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WO2024151104A1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
WO2024151104A1
WO2024151104A1 PCT/KR2024/000542 KR2024000542W WO2024151104A1 WO 2024151104 A1 WO2024151104 A1 WO 2024151104A1 KR 2024000542 W KR2024000542 W KR 2024000542W WO 2024151104 A1 WO2024151104 A1 WO 2024151104A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
refrigerant
indoor
outdoor
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2024/000542
Other languages
French (fr)
Korean (ko)
Inventor
류병진
차우호
양홍주
정청우
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Priority to EP24741725.6A priority Critical patent/EP4650678A1/en
Publication of WO2024151104A1 publication Critical patent/WO2024151104A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F24F3/1423—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with a moving bed of solid desiccants, e.g. a rotary wheel supporting solid desiccants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F2003/1458—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification using regenerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
    • F24F2130/30—Artificial light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/02—System or Device comprising a heat pump as a subsystem, e.g. combined with humidification/dehumidification, heating, natural energy or with hybrid system
    • F24F2203/021—Compression cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/06—Several compression cycles arranged in parallel

Definitions

  • the present invention relates to air conditioners.
  • An air conditioner is a device for controlling the temperature, humidity, cleanliness, and/or airflow distribution of air, and may include an indoor unit and an outdoor unit, and a controller that controls their air conditioning.
  • air conditioners with a dehumidifying function are being used to maintain constant humidity inside a building or factory.
  • an air conditioner that performs a dehumidifying function through several stages can be used.
  • first cooling and dehumidification is performed using a refrigerant heat exchanger (or cold water heat exchanger), and second dehumidification is performed using a dehumidifying rotor, and then again using a refrigerant heat exchanger (or cold water heat exchanger).
  • a technology for tertiary cooling and dehumidification using a cold water heat exchanger (or cold water heat exchanger) has been disclosed.
  • prior art 1 has a problem in that the condensation temperature of the refrigerant varies depending on the outside temperature, lowering the operating efficiency of the cooling cycle. In other words, prior art 1 cannot actively respond to conditions that vary depending on the season (for example, temperature conditions or humidity conditions). In addition, prior art 1 has the disadvantage that if the air is supercooled during the third cooling, a heat source must be added to reheat it, and a heat source must also be added to prevent freezing of the cold water heat exchanger.
  • Republic of Korea Patent Registration No. 10-1061944 discloses an air conditioning system that can implement all cooling, heating, dehumidifying, and humidifying functions and operates differently depending on the season.
  • Prior art 2 above dehumidifies indoor air using only a desiccant rotor, it has limitations in lowering the humidity of the indoor space below a certain level and is not suitable for dehumidifying a large space.
  • Prior art 2 also has the problem of lowering operating efficiency because the condensation temperature of the refrigerant varies depending on the outside temperature.
  • high-temperature regenerative dehumidification rotors need to be regenerated by providing high temperatures.
  • a high temperature environment must be created using a regenerative heater, and thus there is a problem of increased power consumption and reduced energy efficiency.
  • the present invention is intended to solve the problems of the prior art as described above.
  • the purpose of the present invention is to increase dehumidification performance by including three or more dehumidification steps and to recycle the waste heat generated in each dehumidification step.
  • Another purpose of the present invention is to enable the air conditioner to actively respond to environmental conditions that vary depending on the season by varying the operating conditions of the air conditioner.
  • Another object of the present invention is to reduce the use of regenerative heaters by regenerating the dehumidification rotor using a regenerative heat exchanger disposed in the indoor unit.
  • Another object of the present invention is to regenerate a dehumidifying rotor in a high temperature environment using a regenerative refrigerant that operates independently of the main refrigerant.
  • Another object of the present invention is to add a heat exchange unit using regenerated refrigerant that is independent of the air conditioning unit using the main refrigerant, and to enable the heat exchange unit to utilize waste heat by exchanging heat between the main refrigerant and the regenerated refrigerant.
  • Another object of the present invention is to vary the refrigerant pressure loss of the refrigerant passing through each path by setting different paths of low-pressure pipes connected to a plurality of indoor heat exchangers.
  • Another object of the present invention is to enable heat exchange between the refrigerant in the low-pressure pipe and the refrigerant in the liquid pipe through a refrigerant heat exchanger disposed between the indoor unit and the outdoor unit.
  • the present invention may include an outdoor unit including a plurality of outdoor units that are independent from each other, and the outdoor unit.
  • the outdoor unit is connected to the plurality of outdoor units and forms an indoor duct that supplies outside air or indoor air to the indoor space, and a dehumidification rotor that dehumidifies the air inside the indoor duct may be disposed inside.
  • a transfer unit is disposed between the outdoor unit and the indoor unit to transfer the main refrigerant between the outdoor unit and the indoor unit.
  • a heat exchange unit may be disposed between the transfer unit and the indoor unit.
  • the heat exchange unit may include a module compressor that compresses regenerated refrigerant that flows independently of the main refrigerant, and a module heat exchanger in which the main refrigerant and the regenerated refrigerant are circulated, respectively.
  • the module heat exchanger can condense the main refrigerant and evaporate the regenerated refrigerant.
  • the module heat exchanger can exchange heat between the main refrigerant and the regenerated refrigerant.
  • the module heat exchanger can further increase the heat dissipation energy of the regenerative heat exchanger by exchanging heat between the regenerative refrigerant and the main refrigerant.
  • a first regenerative heat exchanger that forms a regenerative refrigerant cycle together with the heat exchange unit may be disposed in the indoor unit.
  • the first regenerative heat exchanger may condense the regenerative refrigerant compressed in the module compressor.
  • the first regenerative heat exchanger may condense the regenerated refrigerant and radiate heat to the air flowing into the dehumidifying rotor. Since the first regenerative heat exchanger can regenerate the dehumidification rotor, energy efficiency can be increased by reducing the amount of regenerative heater usage.
  • the indoor unit may include a plurality of indoor heat exchangers that exchange heat with the air inside the indoor duct and the main refrigerant.
  • a first recovery heat exchanger may be disposed at a first exhaust port through which air inside the indoor duct is discharged to the outside.
  • the first recovery heat exchanger may form a main refrigerant cycle together with one of the plurality of outdoor units and the indoor heat exchangers.
  • the first recovery heat exchanger can exchange heat between the main refrigerant and the exhaust discharged to the outside through the first exhaust port. Accordingly, dehumidification in several stages is possible using a plurality of indoor heat exchangers and the dehumidification rotor, and energy efficiency can be increased by recycling waste heat through the first recovery heat exchanger.
  • the module heat exchanger may be configured as a plate-type heat exchanger. Through a plate heat exchanger, refrigerant-to-refrigerant heat exchange between the main refrigerant and the regenerated refrigerant may be possible.
  • the outdoor unit may include a first outdoor unit, a second outdoor unit, and a third outdoor unit that are independent from each other.
  • the main refrigerant may include a first main refrigerant compressed in the first outdoor unit, a second main refrigerant compressed in the second outdoor unit, and a third main refrigerant compressed in the third outdoor unit.
  • the third main refrigerant can implement additional dehumidification/cooling functions.
  • the indoor unit may include a first indoor heat exchanger, a second indoor heat exchanger, and a first recovery heat exchanger that together with the first outdoor unit constitute a first main refrigerant cycle.
  • the indoor unit may include a second recovery heat exchanger that forms a second main refrigerant cycle together with the second outdoor unit, and a third indoor heat exchanger and a fourth heat exchanger that form a third main refrigerant cycle together with the third outdoor unit. It may include an indoor heat exchanger. Since the second recovery heat exchanger is driven by an evaporator, the refrigerant can effectively absorb heat from the air inside the indoor unit.
  • the transfer unit may be disposed between the first outdoor unit and the indoor unit and may include a first transfer module that transfers the first main refrigerant between the first outdoor unit and the indoor unit.
  • the transfer unit may be disposed between the second outdoor unit and the indoor unit and may include a second transfer module that transfers a second main refrigerant between the second outdoor unit and the indoor unit.
  • the transfer unit may be disposed between the third outdoor unit and the indoor unit and may include a third transfer module that transfers a third main refrigerant between the third outdoor unit and the indoor unit.
  • This connection structure can allow a plurality of heat exchangers to be driven as a condenser or as an evaporator.
  • the heat exchange unit may include a first heat exchange module that is disposed between the second transfer module and the indoor unit and operates a first regenerated refrigerant.
  • the heat exchange unit may further include a second heat exchange module that is disposed between the third transfer module and the indoor unit and operates a second regenerated refrigerant.
  • the first heat exchange module may include a first module compressor that compresses the first regenerated refrigerant.
  • the first heat exchange module may further include a first module expansion valve that is connected to the first regenerative heat exchanger and expands the condensed first regenerative refrigerant.
  • the first heat exchange module may include a first module heat exchanger that evaporates the first regenerated refrigerant and condenses the first main refrigerant.
  • the second heat exchange module may include a second module compressor that compresses the second regenerative refrigerant.
  • the second heat exchange module is connected to the second regenerative heat exchanger and may include a two-module expansion valve that expands the condensed second regenerative refrigerant.
  • the second heat exchange module may include a second module heat exchanger that evaporates the second regenerated refrigerant and condenses the second main refrigerant.
  • the plurality of indoor heat exchangers may include a first indoor heat exchanger and a second indoor heat exchanger connected to the first transfer module, and a third indoor heat exchanger and a fourth indoor heat exchanger connected to the third transfer module.
  • the first indoor heat exchanger and the second indoor heat exchanger may be continuously arranged along the path of the indoor duct.
  • the first indoor heat exchanger arranged in this way can remove the sensible heat load that changes the indoor temperature of the air
  • the second indoor heat exchanger can remove the latent heat load that changes the indoor humidity. It can be removed.
  • the third indoor heat exchanger and the fourth indoor heat exchanger may be continuously arranged along the path of the indoor duct, and the third indoor heat exchanger is located on the opposite side of the second indoor heat exchanger with the dehumidification rotor interposed therebetween. can be placed.
  • first recovery heat exchanger may be connected to the first transfer module, the first indoor heat exchanger, and the second indoor heat exchanger through refrigerant pipes, respectively.
  • the first transfer module may include a first refrigerant distribution valve that controls the flow of refrigerant between the first outdoor unit and the indoor unit, and a first refrigerant heat exchanger.
  • the first refrigerant heat exchanger connects the first main refrigerant flowing through the first low-pressure pipe connected between the first indoor heat exchanger and the first outdoor compressor, and the second indoor heat exchanger and the first outdoor heat exchanger. Heat can be exchanged between the first main refrigerant flowing through the first liquid pipe.
  • the first delivery module may transfer the first main refrigerant compressed by the first outdoor compressor to at least one of some of the plurality of indoor heat exchangers or the first recovery heat exchanger.
  • first indoor heat exchanger may be directly connected to the first refrigerant heat exchanger, and the second indoor heat exchanger may be connected to the first refrigerant heat exchanger through the first refrigerant distribution valve.
  • the second delivery module may transfer the second main refrigerant compressed by the second outdoor compressor to the heat exchange unit.
  • a regenerative heater that regenerates the dehumidifying rotor may be disposed between the dehumidifying rotor and the first regenerative heat exchanger.
  • the indoor unit may include the first exhaust port that exhausts air inside the indoor duct to the outside and where the first recovery heat exchanger is disposed.
  • the indoor unit is provided with a second recovery heat exchanger that is independent of the first exhaust port, discharges air inside the indoor duct to the outside, and exchanges heat between the exhaust exhaust discharged to the outside and the second main refrigerant. Additional exhaust ports may be included.
  • the dehumidification rotor may be disposed between the first regenerative heat exchanger and the second recovery heat exchanger.
  • the second transfer module may include a second refrigerant distribution valve that controls the flow of the second main refrigerant between the second outdoor unit and the first heat exchange module, and a second refrigerant heat exchanger.
  • the second refrigerant heat exchanger includes a second main refrigerant flowing through a second low-pressure pipe connected between the second recovery heat exchanger and the second outdoor compressor, and a second main refrigerant connected between the second outdoor heat exchanger and the heat exchange unit. Heat can be exchanged between the second main refrigerant flowing through the liquid pipe.
  • the third indoor heat exchanger may be disposed on the opposite side of the first indoor heat exchanger and the second indoor heat exchanger with the dehumidification rotor interposed therebetween.
  • the first outdoor unit and the first transmission module may be connected through a refrigerant pipe.
  • the refrigerant pipe is a first low pressure pipe connecting between the suction part of the first outdoor compressor and the first delivery module, and a first high pressure pipe connecting between the discharge part of the first outdoor compressor and the first delivery module. It may include a pipe and a first liquid pipe connecting the first outdoor heat exchanger and the first transfer module.
  • the first outdoor unit may include a first main outdoor valve respectively connected to the discharge part of the first outdoor compressor, the recovery part of the first accumulator, and the first outdoor heat exchanger.
  • the first outdoor unit may further include a first sub-outdoor valve connected to the first main outdoor valve and connected to the first delivery module and a recovery unit of the first accumulator, respectively.
  • first outdoor unit, the first transfer module, the first indoor heat exchanger, the second indoor heat exchanger, and the first recovery heat exchanger may constitute a first air conditioning unit.
  • the second outdoor unit, the second transfer module, the first heat exchange module, the first regenerative heat exchanger, and the second recovery heat exchanger may constitute a second air conditioning unit.
  • the third outdoor unit, the third transfer module, the third indoor heat exchanger, the fourth indoor heat exchanger, the second heat exchange module, and the second regenerative heat exchanger may constitute a third air conditioning unit.
  • first indoor heat exchanger, the second indoor heat exchanger, and the first recovery heat exchanger included in the first air conditioning unit may each be composed of a plurality of heat exchangers connected in parallel.
  • the outdoor unit, the indoor unit, the transfer unit, and the heat exchange unit are operated in a first air conditioning mode, a second air conditioning mode, or a third air conditioning mode depending on the outdoor temperature or outdoor humidity conditions, and the first air conditioning mode mode, the second air conditioning mode, or the third air conditioning mode can be controlled by the main control unit.
  • the air conditioner according to the present invention as seen above has the following effects.
  • the air conditioner of the present invention may include a first air conditioning unit to a third air conditioning unit.
  • the first air conditioning unit can cool/heat/dehumidify the air
  • the second air conditioning unit can dehumidify the air and regenerate the dehumidification rotor at the same time.
  • the third air conditioning unit can additionally cool/heat/dehumidify the air and regenerate the dehumidification rotor.
  • a plurality of air conditioning units can dehumidify the air in several stages using a cooling cycle. Therefore, there is an effect of improving the dehumidification performance of the air conditioner.
  • a plurality of indoor heat exchangers may be arranged in series in the indoor unit. If the air passing through the indoor unit passes through these indoor heat exchangers and the dehumidification rotor in that order, dehumidification in five or more stages can be achieved. Therefore, the air conditioner of the present invention can implement an ultra-low dehumidification function.
  • a recovery heat exchanger is disposed in the indoor unit of the air conditioner of the present invention, and the refrigerant in the recovery heat exchanger can radiate heat to the exhaust discharged to the outside or absorb heat from the exhaust.
  • the efficiency of the refrigeration cycle can be increased by using the waste heat of the exhaust, and as a result, the power consumption of the air conditioner can be reduced to increase energy efficiency.
  • each air conditioning unit of the present invention can be configured as an independent heat pump, and the recovery heat exchanger can be operated as a condenser or evaporator.
  • the recovery heat exchanger operates as a condenser
  • the refrigerant can dissipate heat into the exhaust, and when it operates as an evaporator, the refrigerant can absorb heat from the exhaust. Since the heat dissipation and heat absorption of this refrigerant uses indoor air (ventilation), which has better conditions than outdoor air, the air conditioner can actively respond to various seasons and environmental conditions.
  • the regenerative heat exchanger disposed in the indoor unit of the present invention can be driven by a condenser and simultaneously regenerate the dehumidification rotor through heat dissipation of the refrigerant. Accordingly, the regeneration efficiency of the dehumidification rotor can be increased, and the operation of the regeneration heater for regenerating the dehumidification rotor can be reduced. Through this, the energy efficiency of the air conditioner can be increased.
  • the heat exchange unit of the present invention can form an independent regenerative refrigerant cycle using a different type of refrigerant (regenerated refrigerant) within the air conditioning unit.
  • the regenerative heat exchanger that constitutes the regenerative refrigerant cycle radiates heat during the condensation process of the regenerated refrigerant, allowing the dehumidifying rotor to be regenerated in a high temperature environment. Therefore, a high-temperature regenerative dehumidification rotor can be applied to the indoor unit, and an indoor environment of ultra-low humidity can be established.
  • the heat exchange unit can circulate an independent regenerative refrigerant to form a cascade cycle.
  • the module heat exchanger included in the heat exchange unit can further increase the heat dissipation energy of the regenerative heat exchanger by exchanging heat between the regenerative refrigerant and the main refrigerant. Through this, the regeneration efficiency of the dehumidification rotor can be further increased.
  • the second recovery heat exchanger constituting the second air conditioning unit of the present invention may be driven by an evaporator, and the second recovery heat exchanger may be placed on the outlet side of the high temperature dehumidification rotor. Therefore, the refrigerant in the second recovery heat exchanger can be effectively evaporated by absorbing heat from the high-temperature air that is thrown to the outside after passing through the dehumidification rotor, and the waste heat can be recycled, thereby improving energy efficiency.
  • the evaporation efficiency of the second recovery heat exchanger can be greatly increased.
  • the endothermic energy used at this time can be used to drive another heat exchanger (regenerative heat exchanger). Accordingly, the energy efficiency of the second air conditioning unit can be further improved.
  • the refrigerant discharged from the plurality of indoor heat exchangers provided in the indoor unit of the present invention may be delivered to the first outdoor unit through the first transfer module.
  • the low-pressure pipes connected to each of the plurality of indoor heat exchangers have different movement paths, so the refrigerant pressure loss of the refrigerant discharged from the indoor heat exchangers may be different.
  • the control unit has the effect of controlling the cooling/dehumidification function of the air conditioner more precisely by using the temperature difference due to the difference in refrigerant pressure loss.
  • first transfer module, second transfer module, and third transfer module disposed between the indoor unit and the outdoor unit of the present invention may each be provided with a refrigerant heat exchanger.
  • the refrigerant in the low-pressure pipe and the refrigerant in the liquid pipe passing through the refrigerant heat exchanger can exchange heat with each other. Therefore, if the refrigerant passing through the liquid pipe is (i) in a liquid state, it can be additionally supercooled and stabilized, and (ii) if it is in a two-phase state, it can be liquefied.
  • the operational reliability of the air conditioner can be improved through cooling of this refrigerant.
  • FIG. 1 is a structural diagram showing the schematic configuration of an example of an air conditioner of the present invention.
  • Figure 2 is a block diagram showing the configuration of a control unit and structures controlled by the control unit according to an embodiment of the present invention.
  • Figure 3 is a flow chart sequentially showing the process in which the air conditioner is controlled for each mode by the control unit constituting an embodiment of the present invention.
  • Figure 4 is a structural diagram showing the refrigerant flow in one embodiment of the present invention in the first air conditioning mode.
  • Figure 5 is a flow chart showing the refrigerant flow and air flow of the first air conditioning unit constituting an embodiment of the present invention in the first air conditioning mode.
  • Figure 6 is a flow chart showing the refrigerant flow and air flow of the second air conditioning unit constituting an embodiment of the present invention in the first air conditioning mode.
  • Figure 7 is a flow chart showing the refrigerant flow and air flow of the third air conditioning unit constituting an embodiment of the present invention in the first air conditioning mode.
  • Figure 8 is a structural diagram showing the refrigerant flow in one embodiment of the present invention in the second air conditioning mode.
  • Figure 9 is a flow chart showing the refrigerant flow and air flow of the first air conditioning unit constituting an embodiment of the present invention in the second air conditioning mode.
  • Figure 10 is a flow chart showing the refrigerant flow and air flow of the second air conditioning unit constituting an embodiment of the present invention in the second air conditioning mode.
  • Figure 11 is a flow chart showing the refrigerant flow and air flow of the third air conditioning unit constituting an embodiment of the present invention in the second air conditioning mode.
  • Figure 12 is a structural diagram showing the refrigerant flow in one embodiment of the present invention in the third air conditioning mode.
  • Figure 13 is a flowchart showing the refrigerant flow and air flow of the first air conditioning unit constituting an embodiment of the present invention in the third air conditioning mode.
  • Figure 14 is a flow chart showing the refrigerant flow and air flow of the second air conditioning unit constituting an embodiment of the present invention in the third air conditioning mode.
  • Figure 15 is a flow chart showing the refrigerant flow and air flow of the third air conditioning unit constituting an embodiment of the present invention in the third air conditioning mode.
  • Figure 16 is a structural diagram showing the schematic configuration of a second embodiment of the air conditioner of the present invention.
  • Figure 17 is a structural diagram showing the schematic configuration of a third embodiment of the air conditioner of the present invention.
  • FIG. 18 is a structural diagram showing a first embodiment of the first recovery heat exchanger applied to the third embodiment of FIG. 17.
  • FIG. 19 is a structural diagram showing a second embodiment of the first recovery heat exchanger applied to the third embodiment of FIG. 17.
  • Figure 20 is a structural diagram showing a third embodiment of the first recovery heat exchanger applied to the third embodiment of Figure 17.
  • the present invention relates to an air conditioner, particularly an air conditioner capable of dehumidifying an indoor space.
  • the air conditioner can suck in air and discharge it, and control the temperature and humidity of the air in the process.
  • the flow of air into and out of the air conditioner can be divided as follows. First, the air controlled inside the air conditioner is discharged to the outside of the air conditioner by (i) air supplied to the indoor space (hereinafter referred to as “supply air”, SA) and air discharged to the outdoors (hereinafter referred to as “exhaust air”, EA).
  • the outside air that is sucked into the air conditioner is (i) air flowing into the inside of the air conditioner from the outside (hereinafter referred to as "outside air”, OA), and air flowing into the inside of the air conditioner from indoors. It can be divided into air (hereinafter “ventilation”, RA).
  • the waste heat of the exhaust (EA) can be recycled. More specifically, heat from the refrigerant of the indoor heat exchanger may be dissipated toward the exhaust EA, or heat may be absorbed from the exhaust EA toward the refrigerant of the indoor heat exchanger.
  • the energy of the air conditioner can be saved by dissipating or absorbing heat from the main refrigerant by using the exhaust air (EA) discarded after controlling the temperature/humidity of the indoor space.
  • “recovery” means energy recovery.
  • the air conditioner may configure a refrigerant cycle in which the main refrigerant (first refrigerant) and the regenerated refrigerant (second refrigerant) are independent.
  • the main refrigerant and the regenerative refrigerant may exchange heat with each other.
  • waste heat generated in the main refrigerant cycle by the main refrigerant may be absorbed by the regenerative refrigerant toward the regenerative refrigerant cycle.
  • the regenerative refrigerant cycle can save energy in the air conditioner by using waste heat to regenerate the dehumidifying rotor 460 in a higher temperature environment.
  • “regeneration” refers to regeneration of the dehumidification rotor 460.
  • the air conditioner of this embodiment may largely include a first air conditioning unit (U1), a second air conditioning unit (U2), and a third air conditioning unit (U3).
  • the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) may have independent refrigerant cycles.
  • the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) may share an indoor duct (S) that supplies outside air or indoor air to the indoor space.
  • Independent main refrigerant may flow in the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3).
  • the refrigerant of the first air conditioning unit (U1) is the first main refrigerant
  • the refrigerant of the second air conditioning unit (U2) is the second main refrigerant
  • the refrigerant of the third air conditioning unit (U3) is the third main refrigerant. It will be referred to as the main refrigerant.
  • a refrigerant different from the main refrigerant may flow in the heat exchange units 700 and 900 independent of the air conditioning units.
  • Regenerated refrigerant may flow in the heat exchange units 700 and 900.
  • the first regenerated refrigerant flows in the first heat exchange module 700 constituting the heat exchange units 700 and 900, and the second refrigerant flows in the second heat exchange module 900.
  • Regenerated refrigerant can flow.
  • the first air conditioning unit (U1) can cool/heat/dehumidify air and recycle waste heat of exhausted (EA) air.
  • the second air conditioning unit (U2) can recycle waste heat of exhausted (EA) air and regenerate the dehumidification rotor (460).
  • the third air conditioning unit (U3) can cool/dehumidify the air and regenerate the dehumidifying rotor (460).
  • the first air conditioning unit (U1) may include a first outdoor unit (100) and a portion of an indoor unit (400).
  • the second air conditioning unit (U2) may include another part of the second outdoor unit 200 and the indoor unit 400.
  • the third air conditioning unit (U3) may include the remaining part of the third outdoor unit 300 and the indoor unit 400.
  • the first air conditioning unit (U1) may include a first transmission module 500
  • the second air conditioning unit (U2) may include a second transmission module 600
  • the third air conditioning unit (U3) may include ) may include a third transmission module 800.
  • the first transfer module 500 can transfer the first main refrigerant between the first outdoor unit 100 and the indoor unit 400
  • the second transfer module 600 can transfer the first main refrigerant between the second outdoor unit 200 and the indoor unit 400.
  • the second main refrigerant can be transferred between the indoor units 400
  • the third transfer module 800 can transfer the third main refrigerant between the third outdoor unit 300 and the indoor unit 400.
  • the control unit 1000 controls the first outdoor unit 100, the second outdoor unit 200, the third outdoor unit 300, the indoor unit 400, the first transmission module 500, and the third outdoor unit 300.
  • the second transfer module 600, the third transfer module 800, the first heat exchange module 700, and the second heat exchange module 900 can be controlled.
  • the control unit 1000 is configured to control the first outdoor unit 100, the second outdoor unit 200, the third outdoor unit 300, the indoor unit 400, the first transmission module 500, and the second transmission module ( 600), the third transfer module 800, the first heat exchange module 700, and the second heat exchange module 900 are controlled to control both the flow direction and flow amount of the refrigerant.
  • a plurality of heat exchangers included in the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) operate as a condenser or as an evaporator. It can work. This control may be implemented differently depending on the first to third air conditioning modes, which will be described below.
  • the heat exchangers include the first and second outdoor heat exchangers (130,230), the first and fourth indoor heat exchangers (421,422,430,435), the first and second recovery heat exchangers (410,440), and the first and second regenerative heat exchangers (450,470).
  • 1 and 2 module heat exchangers (730, 930) may be included.
  • the first transfer module 500, the second transfer module 600, and the third transfer module 800 include a first refrigerant heat exchanger 530, a second refrigerant heat exchanger 630, and a third refrigerant heat exchanger, respectively. (830) may be included.
  • the first refrigerant heat exchanger 530, the second refrigerant heat exchanger 630, and the third refrigerant heat exchanger 830 do not operate as condensers or evaporators, and the first refrigerant heat exchanger 530 and the second refrigerant heat exchanger 830 do not operate as condensers or evaporators. It helps heat exchange between refrigerants flowing inside the refrigerant heat exchanger (630).
  • the medium temperature/high pressure first main refrigerant condensed by the first indoor heat exchanger 421 in the first air conditioning mode is transferred to the first refrigerant heat exchanger 530 of the first transfer module 500.
  • the low-temperature/low-pressure first main refrigerant evaporated from the first and second indoor heat exchangers (421, 425) is flowing through the first refrigerant heat exchanger (530). Therefore, the medium-temperature/high-pressure first main refrigerant previously condensed by the first indoor heat exchanger 421 radiates heat (heat exchange) to the low-temperature/low-pressure first main refrigerant when passing through the first refrigerant heat exchanger 530. After being converted into liquid refrigerant, it can flow into the first and second indoor heat exchangers (421, 425).
  • the refrigerant pipe may consist of a total of three.
  • the three refrigerant pipes can be divided into low-pressure pipes, high-pressure pipes, and liquid pipes.
  • the low-pressure pipe, the high-pressure pipe, and the liquid pipe may each have a plurality of organs connected to each other to form one continuous low-pressure pipe, one high-pressure pipe, and one liquid pipe.
  • the low-pressure pipe can be seen as referring to institutions through which low-pressure refrigerant flows
  • the high-pressure pipe can be seen as referring to institutions through which high-pressure refrigerant flows.
  • the low-pressure pipe and the high-pressure pipe may be configured differently depending on the operation mode of the air conditioner.
  • the engine used as a high pressure pipe may be used as a low pressure pipe when operated in the second air conditioning mode.
  • This three-pipe structure can allow the flow direction of the refrigerant to vary. The specific structure of the refrigerant pipe will be described again below.
  • first outdoor unit 100, the second outdoor unit 200, and the third outdoor unit 300 may form one outdoor unit (100, 200, and 300).
  • the outdoor units 100, 200, and 300 may be placed outside the building.
  • the indoor unit 400 may be viewed as a corresponding indoor unit 400.
  • the indoor unit 400 may be placed inside a building.
  • the first transfer module, second transfer module, third transfer module 800, first heat exchange module 700, and second heat exchange module 900 may be placed inside or outside the building.
  • the inside of the first outdoor unit 100 includes a first outdoor compressor 110, a first outdoor heat exchanger 130, and a first outdoor expansion valve 135. , a first main outdoor valve 150, a first sub-outdoor valve 160, and a first accumulator 120 may be included. Additionally, the interior of the first outdoor unit 100 may include a plurality of refrigerant pipes through which the first main refrigerant flows.
  • the first outdoor compressor 110 and the first main outdoor valve 150 may be connected by a first compressor discharge pipe (L101).
  • the first compressor discharge pipe (L101) may basically form a part of the first high pressure pipe.
  • the first outdoor heat exchanger 130 and the first main outdoor valve 150 may be connected through a 1-1 outdoor heat exchange connector (L102).
  • the first outdoor unit 100 may include a first main outdoor valve 150 and a first sub-outdoor valve 160.
  • the first main outdoor valve 150 and the first sub-outdoor valve 160 are connected to each other, and the flow direction of the first main refrigerant can be controlled.
  • the first main outdoor valve 150 and the first sub outdoor valve 160 are each configured as a four-way valve.
  • the first main outdoor valve 150 can selectively connect the first compressor discharge pipe (L101) and the 1-1 outdoor heat exchange connection pipe (L102).
  • first main outdoor valve (150) When the first compressor discharge pipe (L101) and the 1-1 outdoor heat exchange connection pipe (L102) are connected to each other by the first main outdoor valve (150), the first outdoor compressor (110) A portion of the discharged high-temperature/high-pressure first main refrigerant may be transferred to the first outdoor heat exchanger 130 (first air conditioning mode and third air conditioning mode)
  • the first main outdoor valve ( 150) when the first compressor discharge pipe (L101) and the 1-1 outdoor heat exchange connection pipe (L102) are blocked from each other, the high temperature/high pressure first main refrigerant discharged from the first outdoor compressor (110) All of the can be transmitted to the second indoor heat exchanger 425, which will be described later, through the first sub-outdoor valve 160. (second air conditioning mode)
  • the first sub-outdoor valve 160 may deliver low-temperature/low-pressure refrigerant delivered from the outside of the first outdoor unit 100 to the first accumulator 120.
  • the first sub-outdoor valve 160 may be connected to the first outdoor compressor 110 through the first compressor discharge pipe (L101), and the first transmission may be transmitted through the 1-1 outdoor unit connection pipe (L103). It can be connected to the module 500. Accordingly, the first sub-outdoor valve 160 can transfer all or part of the high-temperature/high-pressure first main refrigerant discharged from the first outdoor compressor 110 to the first delivery module 500.
  • the first outdoor heat exchanger 130 may operate as a condenser or evaporator.
  • the first outdoor heat exchanger 130 when the air conditioner operates in the first air conditioning mode and the third air conditioning mode, the first outdoor heat exchanger 130 may be a condenser, and when the air conditioner is operated in the second air conditioning mode, the first outdoor heat exchanger 130 may be a condenser. (130) can be an evaporator.
  • the first outdoor expansion valve 135 may be connected to the first outdoor heat exchanger 130 through the 1-2 outdoor heat exchange connector L121. Additionally, the first outdoor expansion valve 135 may be connected to the first transmission module 500 through a first-second outdoor unit connection pipe L122.
  • the second outdoor unit 200 may have a structure similar to the first outdoor unit 100. That is, the second outdoor unit 200 includes a second outdoor compressor 210, a second outdoor heat exchanger 230, a second outdoor expansion valve 235, a second main outdoor valve 250, and a second sub-outdoor valve ( 260) and a second accumulator 220 may be included. Also, the interior of the second outdoor unit 200 may include a plurality of refrigerant pipes through which the second main refrigerant flows.
  • the second outdoor compressor 210 and the second main outdoor valve 250 may be connected by the second compressor discharge pipe L201.
  • the second compressor discharge pipe (L201) may basically form a part of the second high pressure pipe.
  • the second outdoor heat exchanger 230 and the second main outdoor valve 250 may be connected through a 2-1 outdoor heat exchange connector (L202).
  • the second outdoor unit 200 may include a second main outdoor valve 250 and a second sub-outdoor valve 260.
  • the second main outdoor valve 250 and the second sub-outdoor valve 260 are connected to each other, and the flow direction of the second main refrigerant can be controlled.
  • the second main outdoor valve 250 and the second sub outdoor valve 260 are each configured as a four-way valve.
  • the second main outdoor valve 250 can selectively connect the second compressor discharge pipe (L201) and the 2-1 outdoor heat exchange connection pipe (L202). (i) When the second compressor discharge pipe (L201) and the 2-1 outdoor heat exchange connector (L202) are connected to each other by the second main outdoor valve (250), the second outdoor compressor (210) A portion of the discharged high-temperature/high-pressure refrigerant may be transferred to the second outdoor heat exchanger 230.
  • first air conditioning mode If the second main outdoor valve 250 is used, the second compressor When the discharge pipe (L201) and the 2-1 outdoor heat exchange connection pipe (L202) are blocked from each other, all of the high-temperature/high-pressure refrigerant discharged from the second outdoor compressor (210) is transferred to the second sub-outdoor valve (260). ) can be transmitted to the first heat exchange module 700, which will be described later (second air conditioning mode and third air conditioning mode).
  • the second sub-outdoor valve 260 may transmit the low-temperature/low-pressure second main refrigerant delivered from the outside of the second outdoor unit 200 to the second accumulator 220.
  • the second sub-outdoor valve 260 may be connected to the second outdoor compressor 210 through the second compressor discharge pipe (L201), and the second transmission may be transmitted through the 2-1 outdoor unit connection pipe (L203). It can be connected to the module 600. Accordingly, the second sub-outdoor valve 260 can transfer all or part of the high-temperature/high-pressure second main refrigerant discharged from the second outdoor compressor 210 to the second delivery module 600.
  • the second outdoor heat exchanger 230 may operate as a condenser or evaporator.
  • the second outdoor heat exchanger 230 when the air conditioner operates in the first air conditioning mode, the second outdoor heat exchanger 230 may be a condenser, and when the air conditioner operates in the second or third air conditioning mode, the second outdoor heat exchanger 230 may be a condenser. (230) can be an evaporator.
  • the second outdoor expansion valve 235 may be connected to the second outdoor heat exchanger 230 through the 2-2 outdoor heat exchange connector L221.
  • the second outdoor expansion valve 235 may be connected to the second transmission module 600 through a 2-2 outdoor unit connection pipe (L222).
  • the third outdoor unit 300 may have a similar structure to the first outdoor unit 100 and the second outdoor unit 200. That is, the third outdoor unit 300 includes a third outdoor compressor 310, a third outdoor heat exchanger 330, a third outdoor expansion valve 335, a third main outdoor valve 350, and a third sub-outdoor valve ( 360) and a third accumulator 420 may be included. Additionally, the third outdoor unit 300 may include a plurality of refrigerant pipes through which the third main refrigerant flows.
  • the third outdoor compressor 310 and the third main outdoor valve 350 may be connected by a third compressor discharge pipe (L301).
  • the third compressor discharge pipe (L301) may basically form a part of the third high pressure pipe.
  • the third outdoor heat exchanger 330 and the third main outdoor valve 350 may be connected through a 3-1 outdoor heat exchange connector (L302).
  • the third outdoor unit 300 may include a third main outdoor valve 350 and a third sub outdoor valve 360.
  • the third main outdoor valve 350 and the third sub-outdoor valve 360 are connected to each other, and the flow direction of the third main refrigerant can be controlled.
  • the third main outdoor valve 350 and the third sub outdoor valve 360 are each configured as a four-way valve.
  • the third main outdoor valve 350 can selectively connect the third compressor discharge pipe (L301) and the 3-1 outdoor heat exchange connection pipe (L302).
  • the third outdoor compressor (310) A portion of the discharged high-temperature/high-pressure third main refrigerant may be transferred to the third outdoor heat exchanger 330 (first air conditioning mode and third air conditioning mode)
  • the third main outdoor valve When the third compressor discharge pipe (L301) and the 3-1 outdoor heat exchange connection pipe (L302) are blocked from each other by 350), the high temperature/high pressure third main refrigerant discharged from the third outdoor compressor (310) All of the can be transmitted to the second heat exchange module 900, which will be described later, through the third sub-outdoor valve 360. (second air conditioning mode)
  • the third sub-outdoor valve 360 may deliver the low-temperature/low-pressure third main refrigerant delivered from the outside of the third outdoor unit 300 to the third accumulator 420.
  • the third sub-outdoor valve 360 may be connected to the third outdoor compressor 310 through a third compressor discharge pipe (L301), and may be transmitted to the third outdoor compressor through a 3-1 outdoor unit connection pipe (L303). It can be connected to the module 800. Accordingly, the third sub-outdoor valve 360 can transfer all or part of the high-temperature/high-pressure third main refrigerant discharged from the third outdoor compressor 310 to the third delivery module 800.
  • the third outdoor heat exchanger 330 may operate as a condenser or evaporator.
  • the third outdoor heat exchanger 330 when the air conditioner operates in the first air conditioning mode and the third air conditioning mode, the third outdoor heat exchanger 330 may be a condenser, and when the air conditioner is operated in the second air conditioning mode, the third outdoor heat exchanger 330 may be a condenser. (330) may be an evaporator.
  • the third outdoor expansion valve 335 may be connected to the third outdoor heat exchanger 330 through the 3-2 outdoor heat exchange connector L321.
  • the third outdoor expansion valve 335 may be connected to the third transmission module 800 through a 3-2 outdoor unit connection pipe (L322).
  • the indoor unit 400 may form an indoor duct (S). Outside air (OA) or ventilation (RA) may be introduced into the indoor duct (S), and the air inside the indoor duct (S) may be discharged as supply air (SA) or exhaust air (EA).
  • SA supply air
  • EA exhaust air
  • the indoor duct S can be said to be a type of air passage formed by the indoor unit 400.
  • a plurality of air intakes and air outlets may be disposed in the indoor duct (S).
  • a first outdoor device (G1) and a second outdoor device (G2) through which outdoor air (OA), which is external air, flows into the indoor duct (S) are arranged independently of each other.
  • Outdoor air (OA) may flow into the indoor duct (S) through the first external device (G1) and the second external device (G2), respectively.
  • the indoor duct (S) may be provided with a supply opening (G3) through which air controlled within the indoor duct (S) is supplied to the indoor space. Dehumidified, heated, or cooled air can be supplied to the indoor space through the air supply opening G3.
  • the air supply port (G3) may face a direction opposite to the first external device (G1).
  • the indoor duct (S) may be provided with a ventilation port (G4) through which air (ventilation (RA)) from the indoor space flows back into the indoor duct (S). Ventilation (RA) flows into the indoor duct (S) through the ventilation hole (G4) and can be controlled again.
  • ventilation port (G4) through which air (ventilation (RA)) from the indoor space flows back into the indoor duct (S). Ventilation (RA) flows into the indoor duct (S) through the ventilation hole (G4) and can be controlled again.
  • One or more exhaust ports may be disposed in the indoor duct (S).
  • the exhaust port is for discharging air (exhaust air (EA)) that is discarded from the inside of the indoor duct (S) to the external space.
  • the exhaust port includes a first exhaust port (G5) and a second exhaust port (G6).
  • the exhaust port may consist of one exhaust port, or it may consist of three or more exhaust ports.
  • a first recovery heat exchanger 410 and a second recovery heat exchanger 440 may be disposed adjacent to the first exhaust port G5 and the second exhaust port G6, respectively.
  • the refrigerant of the first recovery heat exchanger 410 and the second recovery heat exchanger 440 radiates heat to the outside air (OA) discharged through the first exhaust port (G5) and the second exhaust port (G6), respectively, or It can absorb heat from outside air (OA).
  • the outdoor air (OA) has a lower temperature (summer season) or a higher temperature (winter season or inter-seasonal season) than the air in the outside space.
  • heat dissipation efficiency can be increased if the refrigerant radiates heat to the outside air (OA) with a temperature lower than the outside air temperature
  • the heat absorption efficiency can be increased. It can get higher.
  • the cooling cycle of the air conditioner is performed through the first recovery heat exchanger 410 and the second recovery heat exchanger 440 located adjacent to the first exhaust port (G5) and the second exhaust port (G6). This can increase efficiency.
  • Recovery of the first recovery heat exchanger 410 and the second recovery heat exchanger 440 may mean energy recovery.
  • a plurality of air conditioning fans may be disposed in the indoor duct (S).
  • the air conditioning fan is used to smooth airflow inside the indoor duct (S).
  • the air conditioning fan includes a first air conditioning fan (F1), a second air conditioning fan (F2), and a third air conditioning fan (F3).
  • the first air conditioning fan (F1) is disposed inside the ventilation hole (G4).
  • the second air conditioning fan (F2) is disposed inside the air supply opening (G3).
  • the third air conditioning fan (F3) is disposed inside the second exhaust port (G6).
  • a first indoor heat exchanger 421, a second indoor heat exchanger 425, a third indoor heat exchanger 430, a fourth indoor heat exchanger 435, and a first recovery heat exchanger ( 410), a second recovery heat exchanger 440, a first regenerative heat exchanger 450, a second regenerative heat exchanger 470, a dehumidifying rotor 460, a regenerative heater 465, etc. may be disposed.
  • the internal components of the indoor unit 400 can control outdoor air (OA) or ventilation (RA) together with the first outdoor unit 100 and the second outdoor unit 200. Control here may include heating, cooling, or dehumidifying the air.
  • the first recovery heat exchanger 410 may be operated as a condenser (first and third air conditioning modes) or an evaporator (second air conditioning mode).
  • first and third air conditioning modes first and third air conditioning modes
  • second air conditioning mode second air conditioning mode
  • the refrigerant in the first recovery heat exchanger 410 may dissipate heat into the exhaust EA discharged from the indoor unit 400 to the outside G5.
  • the exhaust air (EA) has a lower temperature than the external air
  • the amount of heat dissipation of the refrigerant may increase. Accordingly, the operating high pressure of the refrigeration cycle by the first air conditioning unit (U1) is lowered, thereby reducing power consumption.
  • the refrigerant of the first recovery heat exchanger 410 can absorb heat from the exhaust EA discharged from the indoor unit 400 to the outside G5. there is. At this time, since the temperature of the exhaust EA is higher than that of the external air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the first air conditioning unit (U1) increases, thereby reducing power consumption.
  • the first recovery heat exchanger 410 utilizes exhaust (EA) when operating as a condenser or as an evaporator, thus consuming the power required to operate the refrigeration cycle of the first air conditioning unit (U1). It can function to reduce .
  • EA exhaust
  • the first recovery heat exchanger 410 may be placed adjacent to the first exhaust port G5 through which the exhaust gas EA is discharged.
  • the first recovery heat exchanger 410 may be disposed inside the indoor duct (S) such that the surface of the first recovery heat exchanger 410 faces the first exhaust port (G5).
  • the exhaust EA that has passed through the first recovery heat exchanger 410 may be discharged to the external space through the first exhaust port G5.
  • a first bypass (B1) may be disposed in the indoor duct (S).
  • the first bypass (B1) may be disposed on the side of the first air conditioning unit (U1).
  • the first bypass (B1) can be viewed as part of a path formed inside the indoor duct (S).
  • the first bypass B1 may include a blowing fan for air flow.
  • the first bypass (B1) is (i) ventilation (RA) introduced through the ventilation port (G4) becomes exhaust (EA) through the first recovery heat exchanger (410) and flows to the first exhaust port (G5).
  • the moving path and (ii) the path of the outside air (OA) introduced through the first outside device (G1) toward the first indoor heat exchanger (421) and the second indoor heat exchanger (425) are connected to each other. You can. Accordingly, part of the ventilation (RA) flowing into the ventilation opening (G4) becomes exhaust (EA) discharged to the outside through the first recovery heat exchanger (410), and the remaining part becomes the first bypass (B1). You can move through.
  • the air moving through the first bypass (B1) is mixed with the outside air (OA) introduced through the first outside device (G1) to form the first indoor heat exchanger (421) and the second indoor heat exchanger (425). ) can flow.
  • all of the ventilation (RA) becomes exhaust (EA) and is not discharged to the first exhaust port (G5), and part of it can be reused through the first bypass (B1).
  • the temperature of ventilation (RA) introduced from an indoor space is lower than the temperature of outdoor air (OA) supplied from outside. Accordingly, the air moving through the first bypass (B1) mixes with the outside air (OA), thereby lowering the temperature of the air and increasing the driving efficiency of the first air conditioning unit (U1).
  • the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be disposed on the opposite side of the first recovery heat exchanger 410.
  • the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may form one primary indoor heat exchanger 420.
  • the primary indoor heat exchanger 420 can cool, heat, or dehumidify outside air (OA) or ventilation (RA).
  • OA outside air
  • RA ventilation
  • the first indoor heat exchanger 420 is composed of a first indoor heat exchanger 421 and a second indoor heat exchanger 425, but the first indoor heat exchanger 421 and the second indoor heat exchanger ( 425), any one of them may be omitted.
  • the first indoor heat exchanger 420 is composed of two heat exchangers (the first indoor heat exchanger 421 and the second indoor heat exchanger 425), so various heat exchangers depending on load conditions or environmental conditions. Control may be possible. For example, (i) cooling/dehumidification performance can be increased by driving both the first indoor heat exchanger 421 and the second indoor heat exchanger 425 (high load environment, first air conditioning mode, or third air conditioning mode) mode), (ii) cooling/dehumidifying performance may be implemented by operating only one of the first indoor heat exchanger 421 and the second indoor heat exchanger 425 (heavy load environment), (iii) the first indoor heat exchanger 425
  • the heat exchanger 421 may be driven as an evaporator and the second indoor heat exchanger 425 may be driven as a condenser to implement dehumidification and heating functions (low load environment, second air conditioning mode). In this way, by controlling the primary indoor heat exchanger 420 differently depending on load conditions or environmental conditions, the power consumption required to drive
  • the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be arranged in series side by side along the air flow direction inside the indoor duct (S). In this way, the first indoor heat exchanger 421 and the second indoor heat exchanger 425 can continuously control air.
  • the first indoor heat exchanger 421 and the second indoor heat exchanger 425 each operate as an evaporator (first air conditioning mode and third air conditioning mode)
  • the first indoor heat exchanger 421 The air that is first cooled/dehumidified as it passes through can be cooled/dehumidified secondarily as it passes through the second indoor heat exchanger (425).
  • the first indoor heat exchanger 421 can remove the sensible heat load that changes the indoor temperature of the air
  • the second indoor heat exchanger 425 can remove the latent heat load that changes the indoor humidity. Latent heat load can be removed.
  • the first indoor heat exchanger 421 operates as an evaporator and the second indoor heat exchanger 425 operates as a condenser (second air conditioning mode)
  • the first indoor heat exchanger 421 operates as an evaporator and the second indoor heat exchanger 425 operates as a condenser (second air conditioning mode)
  • the initially cooled/dehumidified air may be heated while passing through the second indoor heat exchanger 425, thereby increasing its temperature.
  • the first indoor heat exchanger 421 may be connected to the first recovery heat exchanger 410 through the first indoor unit connection pipe (L128) and the 1-1 indoor heat exchange connection pipe (L124). Additionally, a first indoor expansion valve 423 may be disposed on the 1-1 indoor heat exchange connection pipe (L124). The first indoor unit connection pipe (L128) and the 1-1 indoor heat exchange connection pipe (L124) may form a liquid pipe. The first indoor heat exchanger 421 may be connected to the first refrigerant heat exchanger 530 of the first transfer module 500 through a first heat exchange guide pipe (L117). The first heat exchange guide pipe (L117) may be a first low pressure pipe.
  • the first indoor heat exchanger 421 operates as an evaporator (first air conditioning mode, second air conditioning mode, and third air conditioning mode)
  • the first main refrigerant condensed in the first recovery heat exchanger 410 is 1
  • the first indoor expansion valve 423 After being transferred to the first indoor expansion valve 423 through the indoor unit connection pipe (L128) and expanded, it is transferred to the first indoor heat exchanger 421 and evaporated, and the evaporated first main refrigerant is used in the first heat exchanger. It can be delivered to the first refrigerant heat exchanger (530) through the induction pipe (L117).
  • the second indoor heat exchanger (425) is connected to the first recovery heat exchanger (410) through the first indoor unit connection pipe (L128), the first indoor branch pipe (L125), and the 1-2 indoor heat exchange connection pipe (L126). can be connected with Additionally, a second indoor expansion valve 427 may be disposed on the first-second indoor heat exchange connection pipe L126.
  • the second indoor heat exchanger 425 is connected to the first refrigerant heat exchanger 530 of the first transfer module 500 through the first-2 heat exchange connector L123, and is connected to the first outdoor heat exchanger 530 of the first transfer module 500. It may also be connected to the heat exchanger 130.
  • the second indoor heat exchanger 425 may be connected to the first refrigerant distribution valve 510 of the first transfer module 500 through a first-2 distribution connector L119.
  • the first main refrigerant condensed in the first recovery heat exchanger 410 flows into the first indoor unit connection pipe ( L128) and the first indoor branch pipe (L125) are transferred to the second indoor expansion valve 427 and expanded, then transferred to the second indoor heat exchanger 425 and evaporated.
  • the evaporated first main refrigerant is It can be delivered to the first refrigerant distribution valve 510 through the 1-2 distribution connection pipe (L119).
  • the first main refrigerant condensed in the first outdoor heat exchanger 130 may also be transferred to the second indoor heat exchanger 425 through the first-2 heat exchange connection pipe (L123) and evaporated.
  • the 1-2 heat exchange connector (L123), the first indoor unit connector (L128), and the first indoor branch pipe (L125) may constitute a first liquid pipe, and the 1-2 distribution connector (L119) can be the first low pressure pipe.
  • the high-temperature/high-pressure first main refrigerant delivered to the first outdoor compressor 110 is supplied to the first delivery module ( 500) and may be transmitted to the second indoor heat exchanger 425 through the first-second distribution connector (L119).
  • (i) part is 1-2 indoor heat exchange connection pipe (L126) - 1st indoor branch pipe (L125) - 1-1 indoor heat exchange connection pipe (L124) ) can be transferred to the first indoor heat exchanger (421) and evaporated
  • (ii) another part is 1-2 indoor heat exchange connection pipe (L126) - 1st indoor branch pipe (L125) - 1 It can be delivered to the first recovery heat exchanger (410) through the indoor unit connector (L128) and evaporated
  • (iii) the remainder is 1-2 indoor heat exchange connector (L126) - 1-2 heat exchange connector ( L123) - first refrigerant distribution valve (510) - 1-2 outdoor unit connection pipe (L122) - 1-2 outdoor heat exchange connection pipe (L121) to be delivered to the first outdoor heat exchanger (130) and evaporated.
  • the distribution valve 510, the 1st-2nd outdoor unit connection pipe (L122), and the 1st-2nd outdoor heat exchange connection pipe (L121) may each form a first liquid pipe.
  • the first indoor heat exchanger 421 is directly connected to the first refrigerant heat exchanger 530 of the first transfer module 500, but the second indoor heat exchanger 425 is connected to the first refrigerant heat exchanger 530 of the first transfer module 500. After passing through the first refrigerant distribution valve 510 of the module 500, it joins the first refrigerant heat exchanger 530.
  • the refrigerant pressure drop through the first indoor heat exchanger (421) may be smaller than the refrigerant pressure drop through the second indoor heat exchanger (425).
  • the control unit 1000 can more precisely control the cooling/dehumidifying function of the air conditioner using this temperature difference.
  • the first indoor heat exchanger 421 and the second indoor heat exchanger 425 which are the primary indoor heat exchanger 420, include the first outdoor unit 100, the first transfer module 500, and the first recovery unit.
  • the first air conditioning unit (U1) can be formed together with the heat exchanger 410. Additionally, the plurality of indoor heat exchangers 420, 430, and 435 and the first recovery heat exchanger 410 disposed at the first exhaust port G5 of the indoor duct S may be viewed as one first heat exchange unit.
  • a second recovery heat exchanger 440 may be disposed in the indoor unit 400.
  • the second recovery heat exchanger 440 may be disposed in the indoor unit 400 and operate as an evaporator (first air conditioning mode, second air conditioning mode, and third air conditioning mode).
  • the second main refrigerant of the second recovery heat exchanger 440 can absorb heat from the exhaust EA discharged to the outside from the indoor unit 400.
  • the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the second air conditioning unit (U2) increases, thereby reducing power consumption.
  • the second recovery heat exchanger (440) utilizes the temperature of the exhaust (EA) when operating as an evaporator, thereby reducing the power consumption required to operate the refrigeration cycle of the second air conditioning unit (U2). can do.
  • the second recovery heat exchanger 440 may be placed adjacent to the second exhaust port G6 through which the exhaust gas EA is discharged.
  • the second recovery heat exchanger 440 may be disposed inside the indoor duct (S) such that the surface of the second recovery heat exchanger (440) faces the second exhaust port (G6). Referring to FIG. 1, the exhaust EA that has passed through the second recovery heat exchanger 440 may be discharged to the external space through the second exhaust port G6.
  • a first regenerative heat exchanger 450 may be placed in the indoor duct (S).
  • the first regenerative heat exchanger 450 may operate as a condenser.
  • the first regenerative heat exchanger 450, together with the first heat exchange module 700, may form a first regenerative refrigerant cycle that flows the first regenerative refrigerant. That is, the first heat exchange module 700 and the first regenerative heat exchanger 450 operate an independent first regenerative refrigerant inside the second air conditioning unit (U2), so that the second air conditioning unit (U2) operates under high pressure.
  • It can be a type of cascade cycle that connects a cycle and a low-pressure cycle in parallel.
  • the second outdoor unit 200, the second recovery heat exchanger 440, and the first module heat exchanger 730 of the first heat exchange module 700 may constitute a second main refrigerant cycle.
  • a second main refrigerant may flow in the second main refrigerant cycle.
  • the second main refrigerant may be a different type of refrigerant from the first regenerated refrigerant.
  • the second main refrigerant may include R410A refrigerant
  • the first regenerated refrigerant may include R134A refrigerant.
  • the first module heat exchanger 730 of the first heat exchange module 700 may operate as a condenser for the second main refrigerant and an evaporator for the first regenerated refrigerant.
  • the first module heat exchanger 730 is composed of plate heat exchangers and can exchange heat between two different refrigerants while passing them through independent paths. That is, the first module heat exchanger 730 can enable heat exchange between refrigerants.
  • the first heat exchange module 700 may be disposed between the second transfer module 600 and the indoor unit 400.
  • the first heat exchange module 700 may form part of the heat exchange units 700 and 900 together with the second heat exchange module 900, which will be described below.
  • the heat exchange units 700 and 900 can be viewed as a type of outdoor unit and can be placed outdoors.
  • the first heat exchange module 700 may include a first module compressor 710, a first module accumulator 720, a first module heat exchanger 730, and a first module expansion valve 740.
  • the first module expansion valve 740 and the first module compressor 710 may each be connected to the first regenerative heat exchanger 450.
  • the first module heat exchanger 730 can be a condenser for the second main refrigerant and an evaporator for the first regenerated refrigerant at the same time. As described above, this may be possible because the first module heat exchanger 730 has a plate heat exchanger structure.
  • the first module heat exchanger 730 may be a double-tube type heat exchanger rather than a plate-type heat exchanger.
  • the first regenerative refrigerant of the first regenerative heat exchanger 450 can radiate heat to the air delivered toward the dehumidification rotor 460. Air heated by heat dissipation of the first regenerative refrigerant of the first regenerative heat exchanger 450 can be used for regeneration of the dehumidification rotor 460, and thus the regeneration efficiency of the dehumidification rotor 460 can be increased. . Since the first regenerative heat exchanger 450 can regenerate the dehumidifying rotor 460, power consumption for operating the regenerative heater 465 for regenerating the dehumidifying rotor 460 can be reduced.
  • the first regenerated refrigerant may include a refrigerant with a high extraction temperature, for example, R134A refrigerant.
  • the first regenerative heat exchanger 450 can generate a high temperature of 80°C or more during the condensation process and regenerate the high-temperature regenerative dehumidification rotor 460. Since the efficiency of the regenerative heater 465 is very low, the energy efficiency of the entire air conditioner can be greatly increased by regenerating the dehumidification rotor 460 using the first regenerative heat exchanger 450.
  • a dehumidifying rotor 460 and a regenerative heater 465 may be disposed in the indoor duct (S).
  • the dehumidifying rotor 460 dehumidifies air independently of the first indoor heat exchanger 421, the second indoor heat exchanger 425, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435. You can.
  • the dehumidifying rotor 460 may be configured as a commonly used adsorption dehumidifier (desiccant dehumidifier). More precisely, the dehumidifying rotor 460 and the regenerative heater 465 may be viewed as one dehumidifying device. In this case, the dehumidifying rotor 460 becomes a processing unit, and the regeneration heater 465 becomes a regeneration unit.
  • the dehumidifying rotor 460 may have a ring-shaped structure.
  • the dehumidifying rotor 460 may be arranged to surround the indoor duct (S) in a circle.
  • the dehumidification rotor 460 is shown as crossing the indoor unit 400, but the dehumidification rotor 460 surrounds the inside of the indoor unit 400, that is, the inside of the indoor duct (S) in a circle. It can be deployed.
  • the dehumidification rotor 460 may be disposed between the first regenerative heat exchanger 450 and the second recovery heat exchanger 440.
  • the first regenerative heat exchanger 450 is used as a condenser, and the refrigerant in the first regenerative heat exchanger 450 radiates heat in the direction of the dehumidification rotor 460 to regenerate the dehumidification rotor 460.
  • the refrigerant in the second recovery heat exchanger 440 can absorb heat from the very high temperature exhaust air (EA) heated by the dehumidification rotor 460. Accordingly, the evaporation efficiency of the second recovery heat exchanger 440 is increased, and the cooling efficiency of the entire second air conditioning unit (U2) is improved.
  • EA very high temperature exhaust air
  • the second recovery heat exchanger 440 may be disposed between the dehumidification rotor 460 and the second exhaust port (G6).
  • the air heated through the dehumidifying rotor 460 becomes exhaust gas (EA) discharged to the second exhaust port (G6), and this exhaust gas (EA) is used to heat the second recovery heat exchanger (440). Evaporation efficiency can be increased.
  • a plurality of temperature/humidity sensors may be disposed in the air conditioner.
  • a temperature/humidity sensor may be placed respectively.
  • the control unit 1000 can control each component based on temperature and humidity information obtained through the temperature/humidity sensor.
  • a second bypass (B2) may be disposed in the indoor duct (S).
  • the second bypass (B2) may be disposed on the third air conditioning unit (U3).
  • the second bypass (B2) can be viewed as part of a path formed inside the indoor duct (S).
  • the second bypass B2 may include a blowing fan for air flow.
  • the second bypass (B2) (i) allows air that has passed through the first indoor heat exchanger (421), the second indoor heat exchanger (425), and the dehumidifying rotor (460) to be transferred to the third indoor heat exchanger (430).
  • the outside air (OA) flowing in through the second external device (G2) is connected to the second outside air (OA);
  • the paths toward the regenerative heat exchanger 470 can be connected to each other.
  • a part of the air that has passed through the dehumidifying rotor 460 becomes supply air (SA) while passing through the fourth indoor heat exchanger 435 and is supplied to the indoor space through the air supply opening G3, and the remaining part is supplied to the indoor space through the air supply opening G3. It can be moved through the second bypass (B2).
  • the air moving through the second bypass (B2) may be mixed with the outside air (OA) introduced through the second outside mechanism (G2) and flow into the second regenerative heat exchanger (470).
  • all of the air that has passed through the dehumidifying rotor 460 becomes supply air (SA) and is not supplied to the supply opening (G3), and some of it can be reused through the second bypass (B2).
  • SA supply air
  • G3 supply opening
  • B2 second bypass
  • the temperature of the air passing through the dehumidifying rotor 460 is lower than the temperature of external air (OA) supplied from the outside. Accordingly, the air moving through the second bypass (B2) mixes with the outside air (OA), thereby lowering the temperature of the air and increasing the driving efficiency of the third air conditioning unit (U3).
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be disposed on the opposite side of the second regenerative heat exchanger 470.
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 can cool and dehumidify the air that has passed through the dehumidification rotor 460.
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be spaced apart from the primary indoor heat exchanger 420 to form a secondary indoor heat exchanger.
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 include the third outdoor unit 300, the third transfer module 800, the second heat exchange module 900, and the second regenerative heat exchanger ( Together with 470), a third air conditioning unit (U3) can be formed.
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be operated as evaporators.
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 can cool/dehumidify outdoor air (OA) or ventilation (RA) while operating as an evaporator.
  • OA outdoor air
  • RA ventilation
  • the air previously cooled/dehumidified by the first indoor heat exchanger (421) and the second indoor heat exchanger (425) is further cooled/dehumidified by the third indoor heat exchanger (430) and the fourth indoor heat exchanger (435).
  • the humidity in indoor space can be greatly reduced.
  • the dehumidifying rotor 460 which will be described below, is also used together with the first indoor heat exchanger 421, the second indoor heat exchanger 425, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435.
  • OA outside air
  • RA ventilation
  • the third indoor heat exchanger 430 may be connected to the third transfer module 800 through a third heat exchange transfer pipe (L317).
  • the fourth indoor heat exchanger 435 may be connected to the third transfer module 800 through a fourth heat exchange transfer pipe (L324).
  • the third indoor heat exchanger (430) is the third refrigerant heat exchanger (830) of the third transfer module (800) through the third heat exchange transfer pipe (L317) and the third heat exchange connector (L316). can be connected to At this time, the third heat exchange transmission pipe (L317) and the third heat exchange connection pipe (L316) may be the third low pressure pipe. That is, when the third indoor heat exchanger (430) is operated as an evaporator, the low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger (430) is transferred to the third heat exchange transfer pipe (L317) and the third heat exchanger (L317). It flows to the third refrigerant heat exchanger 830 through the third heat exchange connection pipe L316, and the third refrigerant heat exchanger 830 can guide the third main refrigerant to the third outdoor unit 300.
  • the fourth indoor heat exchanger 435 may be connected to the third refrigerant heat exchanger 830 of the third transfer module 800 through the 3-2 distribution connector L319.
  • the fourth indoor heat exchanger 435 may be connected to the second module heat exchanger 930 through the fourth heat exchange transfer pipe L324.
  • the fourth heat exchange transfer pipe (L324) transfers the medium-temperature/high-pressure third main refrigerant condensed in the third outdoor heat exchanger (330) to the fourth heat exchanger (L324). It can be evaporated by passing it to the indoor heat exchanger (435).
  • the low-temperature/low-pressure third main refrigerant discharged from the fourth indoor heat exchanger (435) passes through the third refrigerant distribution valve (810) through the 3-2 distribution connector (L319) to the third refrigerant heat exchanger. It flows to (830), and the third main refrigerant may be guided to the third outdoor unit (300) through the third refrigerant heat exchanger (830).
  • the fourth heat exchange transfer pipe (L324) may constitute a third liquid pipe
  • the 3-2 distribution connection pipe (L319) may constitute a third low pressure pipe.
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 become additional indoor heat exchangers, and the additional indoor heat exchanger forms a second heat exchange unit together with the second regenerative heat exchanger 470. It can be seen that it does.
  • the second regenerative heat exchanger 470 may operate as a condenser, and the second regenerative heat exchanger 470 may flow the second regenerative refrigerant together with the second heat exchange module 900.
  • the second regenerative heat exchanger 470 may be connected to the second module heat exchanger 930 of the second heat exchange module 900 through a second regenerative heat exchange connector 347.
  • the second regenerative heat exchanger 470 may form a second regenerative refrigerant cycle that flows the second regenerative refrigerant. That is, the second heat exchange module 900 and the second regenerative heat exchanger 470 operate an independent second regenerative refrigerant inside the third air conditioning unit (U3), so that the third air conditioning unit (U3) operates under high pressure. It can be a type of cascade cycle that connects a cycle and a low-pressure cycle in parallel.
  • the third outdoor unit 300, the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the second module heat exchanger 930 of the second heat exchange module 900 are A third main refrigerant cycle can be configured.
  • a third main refrigerant may flow in the third main refrigerant cycle.
  • the third main refrigerant may be a different type of refrigerant from the second regenerated refrigerant.
  • the third main refrigerant may include R410A refrigerant
  • the second regenerative refrigerant may include R134A refrigerant.
  • the second module heat exchanger 930 of the second heat exchange module 900 may operate as a condenser for the third main refrigerant and an evaporator for the second regenerated refrigerant.
  • the second module heat exchanger 930 is composed of plate heat exchangers and can exchange heat between two different refrigerants while passing them through independent paths. That is, the second module heat exchanger 930 can enable heat exchange between refrigerants.
  • the second heat exchange module 900 may be disposed between the third transfer module 800 and the indoor unit 400.
  • the second heat exchange module 900 may form part of the heat exchange units 700 and 900 together with the first heat exchange module 700.
  • the heat exchange units 700 and 900 can be viewed as a type of outdoor unit and can be placed outdoors.
  • the second heat exchange module 900 may include a second module compressor 910, a second module accumulator 920, a second module heat exchanger 930, and a second module expansion valve 940.
  • the second module expansion valve 940 and the second module compressor 910 may each be connected to the second regenerative heat exchanger 470.
  • the second module heat exchanger 930 can be a condenser for the third main refrigerant and at the same time an evaporator for the second regenerated refrigerant. As described above, this may be possible because the second module heat exchanger 930 has a plate heat exchanger structure.
  • the second module heat exchanger 930 may be a double pipe type heat exchanger rather than a plate heat exchanger.
  • the second regenerative heat exchanger 470 operates as a condenser, and the second regenerative refrigerant of the second regenerative heat exchanger 470 is supplied to the air delivered in the direction of the dehumidification rotor 460 (direction K3 in FIG. 1). Can dissipate heat. Air heated by heat dissipation of the second regenerative refrigerant flowing through the second regenerative heat exchanger 470 can be used for regeneration of the dehumidification rotor 460, thereby increasing the regeneration efficiency of the dehumidification rotor 460. You can. Since the second regenerative heat exchanger 470 can regenerate the dehumidifying rotor 460, power consumption for operating the regenerative heater 465 for regenerating the dehumidifying rotor 460 can be reduced.
  • an operation mode can be selected (S200).
  • the operating mode may vary depending on the conditions of the location where the air conditioner is installed.
  • the operation mode may be selected depending on conditions such as temperature, humidity, and internal volume of the installation location.
  • the operation mode may be comprised of a first air conditioning mode (S310), a second air conditioning mode (S320), and a third air conditioning mode (S330).
  • the first air conditioning mode, second air conditioning mode, or third air conditioning mode can be automatically selected under different conditions.
  • the first air conditioning mode, the second air conditioning mode, or the third air conditioning mode may be selected depending on the external temperature.
  • the first air conditioning mode can be selected at 27°C or higher (T1)
  • the second air conditioning mode can be selected at 15°C or lower (T2)
  • the third air conditioning mode can be selected at 15°C-27°C (T3).
  • T1 27°C or higher
  • T2 the second air conditioning mode
  • T3 15°C-27°C
  • the temperature conditions may vary depending on the user's choice or environment.
  • humidity conditions may be used as a standard for selecting the operation mode instead of the temperature conditions.
  • the operation of the components constituting the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) can be controlled.
  • S410 the first outdoor compressor 110, the second outdoor compressor 210, and the third outdoor compressor 310 are operated.
  • the first module heat exchanger 730 and the second module heat exchanger 930 may each be operated as a condenser.
  • the first module heat exchanger 730 and the second module heat exchanger 930 may each be operated as an evaporator.
  • the control unit 1000 includes the first main outdoor valve 150, the first sub-outdoor valve 160, the second main outdoor valve 250, the second sub-outdoor valve 260, and the third main valve.
  • the control unit 1000 includes the first main outdoor valve 150, the first sub-outdoor valve 160, the second main outdoor valve 250, the second sub-outdoor valve 260, and the third main valve.
  • the outdoor valve 350, the third sub-outdoor valve 360, the first transmission module 500, the second transmission module 600, and the third transmission module 800 the first air conditioning
  • the refrigerant flow in the unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) can be controlled.
  • each component can be operated as a condenser or evaporator.
  • control unit 1000 controls (i) the first main outdoor valve 150, the first sub-outdoor valve 160, the second main outdoor valve 250, and the second sub-outdoor valve. (260), the third main outdoor valve 350, the third sub-outdoor valve 360, the first delivery module 500, the second delivery module 600, and the third delivery module 800.
  • the flows of the first main refrigerant, the second main refrigerant, and the third main refrigerant can be controlled by controlling (ii) the first heat exchange module 700 and the second heat exchange module 900, respectively.
  • the flow of the first regenerated refrigerant and the second regenerated refrigerant can be controlled.
  • the first air conditioning mode can perform a dehumidifying and air cooling function to lower the indoor temperature.
  • FIG 4 when in the first air conditioning mode, the main refrigerant flow and the regenerative refrigerant flow are indicated by arrows.
  • the first main refrigerant flow in the first air conditioning unit (U1) is shown in the form of a flowchart
  • Figure 6 the second regenerative refrigerant flow and the first regenerative refrigerant flow in the second air conditioning unit (U2) are shown in the form of a flowchart
  • 7 the third refrigerant flow and the second regenerated refrigerant flow in the third air conditioning unit (U3) are shown in the form of a flowchart.
  • the first outdoor compressor 110 compresses the first main refrigerant, High-temperature/high-pressure refrigerant is discharged through the first compressor discharge pipe (L101). Some of the discharged high-temperature/high-pressure first main refrigerant is transferred to the first recovery heat exchanger (410), and the remaining part is transferred to the first outdoor heat exchanger (130). That is, the first recovery heat exchanger 410 and the first outdoor heat exchanger 130 can each be used as a condenser.
  • the path through which the first main refrigerant flows to the first recovery heat exchanger 410 may be the first high pressure pipe.
  • the first high pressure pipe may be the first compressor discharge pipe (L101), the 1-1 outdoor unit connection pipe (L103), and the 1-1 distribution connection pipe (L105).
  • the first refrigerant distribution valve 510 of the first delivery module 500 is disposed between the 1-1 outdoor unit connection pipe (L103) and the 1-1 distribution connection pipe (L105), The first refrigerant distribution valve 510 can connect them.
  • the path through which the first main refrigerant flows to the first outdoor heat exchanger 130 may also be the first high pressure pipe.
  • the first high pressure pipe may be the first compressor discharge pipe (L101)-1-1 outdoor heat exchange connection pipe (L102).
  • L101 first compressor discharge pipe
  • L102 first outdoor heat exchange connection pipe
  • the first main refrigerant may be supplied to the first recovery heat exchanger 410 at a flow rate greater than that of the first outdoor heat exchanger 130. For example, about 70% of the first main refrigerant may be supplied to the first recovery heat exchanger 410, and about 30% of the first main refrigerant may be supplied to the first outdoor heat exchanger 130.
  • the first main refrigerant condensed in the first recovery heat exchanger 410 is in a medium temperature/high pressure state and can be transferred to the first indoor heat exchanger 421 and the second indoor heat exchanger 425.
  • the path of the first main refrigerant flowing to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be the first liquid pipe.
  • the first indoor unit connection pipe (L128) becomes the first liquid pipe through which the refrigerant flows to the first indoor heat exchanger 421, and the first indoor unit connection pipe (L128) - first indoor branch pipe ( L125) becomes the first liquid pipe through which the refrigerant flows to the second indoor heat exchanger (425).
  • the first indoor expansion valve 423 is disposed on the 1-1 indoor heat exchange connection pipe (L124), and the refrigerant is expanded in the first indoor expansion valve 423 in the first indoor heat exchanger 421, which is an evaporator. ) can flow.
  • the second indoor expansion valve 427 is disposed in the first-second indoor heat exchange connection pipe (L126), and the first main refrigerant is expanded in the second indoor expansion valve 427 and is used in the second indoor heat exchanger, which is an evaporator. It can flow into the group 425.
  • first indoor heat exchanger 421 and the second indoor heat exchanger 425 each function as an evaporator, they can cool/dehumidify the air inside the indoor duct (S).
  • Outdoor air (OA) that is primarily cooled/dehumidified while passing through the first indoor heat exchanger 421 may be secondarily cooled/dehumidified while passing through the second indoor heat exchanger 425.
  • the direction K1 in which the outside air (OA) passes through the first indoor heat exchanger 421 and the second indoor heat exchanger 425 and is discharged is indicated by a thick arrow.
  • the first main refrigerant may be supplied to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 at different ratios.
  • a larger amount of first main refrigerant may be supplied to the first indoor heat exchanger 421, which is close to the first recovery heat exchanger 410, than to the second indoor heat exchanger 425. This is because a larger amount of first main refrigerant was supplied to the first recovery heat exchanger 410 than to the first outdoor heat exchanger 130 under the control of the control unit 1000.
  • about 70% of the first main refrigerant may be supplied to the first indoor heat exchanger 421, and about 30% of the first main refrigerant may be supplied to the second indoor heat exchanger 425.
  • the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be arranged side by side along the air flow direction inside the indoor duct (S). Accordingly, the first indoor heat exchanger 421 and the second indoor heat exchanger 425 can continuously cool/dehumidify the outside air (OA).
  • the outdoor air (OA) cooled by the first indoor heat exchanger 421 and the second indoor heat exchanger 425 continues to flow and is dehumidified three times while passing through the dehumidifying rotor 460, and finally, the third indoor heat exchanger 425 It is cooled/dehumidified in the 4th and 5th stages by the indoor heat exchanger 430 and the fourth indoor heat exchanger 435 to become supply air (SA), and can be supplied to the indoor space through the supply opening (G3).
  • SA supply air
  • the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110. Therefore, the first heat exchange induction pipe (L117) - the first heat exchange connection pipe (L116) - the first accumulator connection pipe (L111) - the first accumulator suction pipe (L113) may be the first low pressure pipe.
  • the first refrigerant heat exchanger 530 is a low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 and the second indoor heat exchanger 425, and the first outdoor heat exchanger ( 130), the condensed medium temperature/high pressure refrigerant can be heat exchanged with each other.
  • the medium-temperature/high-pressure first main refrigerant condensed in the first outdoor heat exchanger (130) passes through the first refrigerant heat exchanger (530) to the first indoor heat exchanger (421) and the second indoor heat exchanger (425). Heat can be dissipated (heat exchanged) into the low-temperature/low-pressure first main refrigerant discharged from .
  • the first main refrigerant of medium temperature/high pressure can be supplied to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 in the state of liquid refrigerant.
  • the first recovery heat exchanger 410 operates as a condenser and the first main refrigerant of the first recovery heat exchanger 410 flows toward the exhaust (EA). It can dissipate heat. That is, the first main refrigerant of the first recovery heat exchanger 410 can radiate heat to the exhaust EA while exchanging heat with the exhaust EA discharged through the first exhaust port G5.
  • the ventilation (RA) passes through the first recovery heat exchanger (410), and the first main refrigerant of the first recovery heat exchanger (410) radiates heat to the exhaust (EA), which is represented by a bold arrow. It is done.
  • some of the air supplied to the first recovery heat exchanger 410 is ventilation (RA) drawn from the indoor space and has a temperature lower than the outside air temperature.
  • RA ventilation
  • the exhaust air (EA) that exchanges heat with the first recovery heat exchanger (410) has a lower temperature than the outside air
  • heat dissipation of the first main refrigerant passing through the first recovery heat exchanger (410) can be performed more effectively.
  • the first main refrigerant of the first recovery heat exchanger 410 is more effectively dissipated by using the waste heat of the exhaust (EA). Accordingly, the high operating pressure of the refrigeration cycle of the first air conditioning unit (U1) is lowered, thereby improving efficiency and reducing power consumption.
  • the air that exchanges heat with the first main refrigerant of the first recovery heat exchanger 410 is ventilation (RA) supplied from indoors, so its temperature is lower than that of the outside air, and therefore heat can be dissipated smoothly without overload.
  • RA ventilation
  • the first heat recovery expansion valve 415 may be disposed in the first heat recovery connector L127 connected to the first recovery heat exchanger 410.
  • the control unit 1000 can control the flow rate of the high-temperature/high-pressure first main refrigerant supplied to the first recovery heat exchanger 410 by adjusting the opening rate of the first heat recovery expansion valve 415. Since the high-temperature/high-pressure first main refrigerant flow rate discharged from the first outdoor compressor 110 is determined, when the first main refrigerant flow rate supplied to the first recovery heat exchanger 410 is adjusted, the first outdoor heat exchanger 410 The flow rate of the first main refrigerant supplied to (130) can also be adjusted. By adjusting the refrigerant flow rate, the degree of recovery of waste heat through the first recovery heat exchanger 410 can be adjusted.
  • the first recovery heat exchanger (410) operates as a condenser and the first recovery heat exchanger (410) operates as a condenser. It is more effective for the first main refrigerant of the single recovery heat exchanger (410) to radiate heat to the ventilation (RA) than to radiate heat to the outside air.
  • the first recovery heat exchanger (410) operates as a condenser and the first recovery heat exchanger Dissipation of heat by the first main refrigerant of the unit 410 to the ventilation RA is less efficient than dissipation of heat to external air.
  • the opening rate of the first heat recovery expansion valve 415 is adjusted to reduce the flow rate of the first main refrigerant flowing into the first recovery heat exchanger 410, which is a condenser, and the first outdoor heat exchanger 130, which is another condenser. ), heat dissipation efficiency can be increased by increasing the flow rate of the first main refrigerant flowing into the system.
  • the second outdoor compressor (210)
  • the second main refrigerant is compressed, and the high-temperature/high-pressure second main refrigerant is discharged through the second compressor discharge pipe (L201).
  • Some of the discharged high-temperature/high-pressure second main refrigerant is transferred to the first module heat exchanger (730) through the second transfer module (600), and the remaining part is transferred to the second outdoor heat exchanger (230).
  • the first module heat exchanger 730 and the second outdoor heat exchanger 230 may each be used as a condenser.
  • the path through which the second main refrigerant flows to the first module heat exchanger 730 may be the second high pressure pipe.
  • the second high pressure pipe may be the second compressor discharge pipe (L201) - the 2-1 outdoor unit connection pipe (L203) - the 2-1 distribution connection pipe (L205).
  • the second refrigerant distribution valve 610 of the second delivery module 600 is disposed between the 2-1 outdoor unit connection pipe (L203) and the 2-1 distribution connection pipe (L205), The second refrigerant distribution valve 610 can connect them.
  • the path through which the second main refrigerant flows to the second outdoor heat exchanger 230 may also be a second high-pressure pipe.
  • the second high pressure pipe may be the second compressor discharge pipe (L201) - the 2-1 outdoor heat exchange connection pipe (L202).
  • the second main outdoor valve 250 and the second sub-outdoor valve 260 can be viewed as OFF.
  • the second main refrigerant condensed in the first module heat exchanger 730 and the second outdoor heat exchanger 230 may be mixed with each other and evaporated in the second recovery heat exchanger 440.
  • the second main refrigerant of the second recovery heat exchanger (440) may absorb heat from the exhaust (EA) discharged to the outside from the indoor unit (400). At this time, since the temperature of the exhaust EA is higher than that of the external air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the second air conditioning unit (U2) increases, thereby reducing power consumption.
  • the second recovery heat exchanger (440) utilizes the temperature of the exhaust (EA) when operating as an evaporator, thereby reducing the power consumption required to operate the refrigeration cycle of the second air conditioning unit (U2). can do.
  • the second recovery heat exchanger 440 may be placed adjacent to the second exhaust port G6 through which the exhaust gas EA is discharged.
  • the second recovery heat exchanger 440 may be disposed inside the indoor duct (S) such that the surface of the second recovery heat exchanger (440) faces the second exhaust port (G6).
  • the exhaust EA that has passed through the second recovery heat exchanger 440 may be discharged to the external space through the second exhaust port G6.
  • the second recovery heat exchanger 440 may be disposed between the dehumidification rotor 460 and the second exhaust port G6.
  • the air heated through the dehumidifying rotor 460 becomes exhaust air (EA) discharged through the second exhaust port (G6), and the evaporation efficiency of the second recovery heat exchanger (440) is increased by using this exhaust air (EA). It can go even higher.
  • the first regenerative heat exchanger 450 together with the first heat exchange module 700, may form a separate first regenerative refrigerant cycle that flows the first regenerative refrigerant.
  • heat generated in the first regenerative heat exchanger 450 which operates as a condenser, may be transferred to the dehumidification rotor 460.
  • the air introduced into the second external mechanism (G2), the air delivered through the second bypass (B2), and the air passing through the second regenerative heat exchanger (470) are transferred to the first regenerative heat exchanger (450). ), heat exchange occurs and the temperature may rise further.
  • the heated air can be delivered to the dehumidification rotor 460 to regenerate the dehumidification rotor 460. Accordingly, the amount of use of the regeneration heater 465 for regeneration of the dehumidification rotor 460 can be reduced, and as a result, the power consumption for driving the second air conditioning unit (U2) can be reduced.
  • the air radiated from the first regenerative heat exchanger 450 passing through the dehumidifying rotor 460 is represented by a thick arrow.
  • the second main refrigerant may be supplied to the first module heat exchanger 730 at a flow rate greater than that of the second outdoor heat exchanger 230.
  • about 70% of the second main refrigerant may be supplied to the first heat exchange module 700, and about 30% of the second main refrigerant may be supplied to the second outdoor heat exchanger 230.
  • the first regenerative refrigerant may flow through the first regenerative refrigerant cycle composed of the first heat exchange module 700 and the first regenerative heat exchanger 450.
  • the first module compressor 710 discharges the compressed high-temperature/high-pressure first regenerative refrigerant to the discharge pipe L245 of the first module compressor 710.
  • the discharged high-temperature/high-pressure first regenerative refrigerant is transferred to the first regenerative heat exchanger 450, and the first regenerative heat exchanger 450 can condense the first regenerative refrigerant.
  • the first regenerative refrigerant radiates heat, and after dissipating heat, the first regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. Then, the first regenerative refrigerant is delivered to the first module expansion valve 740 through the first regenerative heat exchange connection pipe (L247) and expanded, and then through the first module heat exchange connection pipe (L248) to the first module heat exchanger. It may be delivered to (730) and evaporated. The evaporated first regenerated refrigerant may be delivered to the first module accumulator 720 through the first module accumulator suction pipe (L241).
  • the second main refrigerant and the first regenerated refrigerant passing through the first module heat exchanger 730 may exchange heat with each other.
  • the second main refrigerant may be condensed in the first module heat exchanger 730, radiating heat to the first regenerated refrigerant, and converted into a liquid phase. Accordingly, the second main refrigerant can dissipate heat more effectively, and the operating high pressure of the second main refrigerant cycle of the second air conditioning unit (U2) is lowered, improving efficiency and reducing power consumption.
  • the first regenerated refrigerant may absorb heat from the second main refrigerant flowing through the first module heat exchanger 730. At this time, because the temperature of the second main refrigerant is high, the amount of heat absorption may increase. Accordingly, the operating low pressure of the first regenerative refrigerant cycle constituting the second air conditioning unit (U2) increases, thereby reducing power consumption.
  • the air blowing temperature of the first regenerative heat exchanger 450 which constitutes the first regenerative refrigerant cycle, can be increased to about 80°C or higher and used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. In this way, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.
  • Air heated while passing through the second regenerative heat exchanger 470 constituting the third air conditioning unit U3 may be transferred in the direction K3 to the first regenerative heat exchanger 450.
  • the air flow is represented by a thick arrow.
  • the air delivered in the direction K3 of the first regenerative heat exchanger 450 may be delivered to the dehumidifying rotor 460 in a state whose temperature is raised again by the first regenerative heat exchanger 450.
  • the air regenerated to high temperature by the dehumidification rotor 460 may be delivered to the second recovery heat exchanger 440. Air that has passed through the second recovery heat exchanger 440 may be exhausted (EA).
  • the third outdoor compressor 310 is the third refrigerant flow.
  • the main refrigerant is compressed, and the high-temperature/high-pressure third main refrigerant is discharged through the third compressor discharge pipe (L301).
  • Some of the discharged high-temperature/high-pressure third main refrigerant is transferred to the second module heat exchanger (930) through the third transfer module (800), and the remaining part is transferred to the third outdoor heat exchanger (330).
  • the second module heat exchanger 930 and the third outdoor heat exchanger 330 may each be used as a condenser.
  • the path through which the third main refrigerant flows to the second module heat exchanger 930 may be the second high pressure pipe.
  • the second high pressure pipe may be the third compressor discharge pipe (L301) - the 3-1 outdoor unit connection pipe (L303) - the 3-1 distribution connection pipe (L305).
  • the third refrigerant distribution valve 810 of the third delivery module 800 is disposed between the 3-1 outdoor unit connection pipe (L303) and the 3-1 distribution connection pipe (L305), The third refrigerant distribution valve 810 can connect them.
  • the third main refrigerant condensed in the second module heat exchanger 930 is in a medium temperature/high pressure state and can be delivered to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.
  • the third main refrigerant condensed by the third outdoor heat exchanger 330 passes through the third refrigerant heat exchanger 830 and is mixed with the third main refrigerant condensed in the second module heat exchanger 930. You can.
  • the third main refrigerant mixed in this way can be delivered to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.
  • the path of the third main refrigerant flowing to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be a third liquid pipe.
  • the 3-2 outdoor unit connection pipe (L322) - the 2nd main connection pipe (L323) - the 4th heat exchange transmission pipe (L324) is connected to the 3rd indoor heat exchanger 430 and the 4th indoor heat exchanger ( 435), which becomes the third liquid pipe through which the refrigerant flows.
  • the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidifying rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are installed in the indoor space. Inside the duct (S), they may be arranged continuously along the direction of air flow. Accordingly, the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidification rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are The humidity of the outdoor air (OA) can be greatly reduced by continuously dehumidifying the outdoor air (OA) a total of five times.
  • the low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 flows into the third transfer module 800 through the third heat exchange transfer pipe (L317), and the third transfer module 800 ) can be transmitted to the third refrigerant heat exchanger (830) through the third heat exchange connection pipe (L316).
  • the low-temperature/low-pressure third main refrigerant discharged from the fourth indoor heat exchanger (435) flows into the third transfer module (800) through the third-2 distribution connector (L319), and the third main refrigerant is discharged from the fourth indoor heat exchanger (435).
  • the refrigerant may be transferred to the third refrigerant heat exchanger 830 via the third refrigerant distribution valve 810.
  • the third main refrigerant that has passed through the third refrigerant heat exchanger (830) is supplied to the third accumulator (420) through the third accumulator connection pipe (L311) and the third accumulator suction pipe (L313). It can be sucked back into the third outdoor compressor (310) through the third compressor suction pipe (L315). Therefore, the 3-2 distribution connection pipe (L319) - the 3rd heat exchange connection pipe (L316) - the 3rd accumulator connection pipe (L311) - the 3rd accumulator suction pipe (L313) can be a third low pressure pipe.
  • the third refrigerant heat exchanger 830 is a low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the third outdoor heat exchanger.
  • the medium temperature/high pressure third main refrigerant condensed at (330) can be heat exchanged with each other.
  • the medium-temperature/high-pressure third main refrigerant condensed in the third outdoor heat exchanger (330) passes through the third refrigerant heat exchanger (830) to the third indoor heat exchanger (430) and the fourth indoor heat exchanger (435). ) can radiate heat to the low-temperature/low-pressure third main refrigerant discharged from ).
  • the third main refrigerant of medium temperature/high pressure can be supplied to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 in the state of a liquid refrigerant.
  • the second regenerative refrigerant may flow through the second regenerative refrigerant cycle composed of the second heat exchange module 900 and the second regenerative heat exchanger 470.
  • the second module compressor 910 discharges the compressed high-temperature/high-pressure second regenerative refrigerant to the discharge pipe L345 of the second module compressor 910.
  • the discharged high-temperature/high-pressure second regenerative refrigerant is transferred to the second regenerative heat exchanger 470, and the second regenerative heat exchanger 470 can condense the second regenerative refrigerant.
  • the second regenerative refrigerant radiates heat, and after dissipating heat, the second regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant.
  • the second regenerative refrigerant may be transferred to the second module expansion valve 940 through the second regenerative heat exchange connection pipe L347 and expanded, and then transferred to the second module heat exchanger 930 to be evaporated.
  • the evaporated second regenerated refrigerant may be delivered to the second module accumulator through the second module accumulator suction pipe (L341).
  • the third main refrigerant and the second regenerative refrigerant passing through the second module heat exchanger 930 may exchange heat with each other.
  • the third main refrigerant may be condensed in the second module heat exchanger 930, radiating heat to the second regenerated refrigerant, and converted into a liquid phase. Accordingly, the third main refrigerant can dissipate heat more effectively, and the operating high pressure of the third main refrigerant cycle of the third air conditioning unit (U3) is lowered, improving efficiency and reducing power consumption.
  • the second regenerated refrigerant can absorb heat from the third main refrigerant flowing through the second module heat exchanger 930.
  • the operating low pressure of the second regenerative refrigerant cycle constituting the third air conditioning unit (U3) increases, thereby reducing power consumption.
  • the air blowing temperature of the second regenerative heat exchanger 470 which constitutes the second regenerative refrigerant cycle, can be increased to about 60°C or higher and delivered in the direction K3 to the first regenerative heat exchanger 450.
  • the air delivered in this way can be used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. Therefore, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.
  • the third main refrigerant cools/dehumidifies the air while evaporating in the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.
  • the second module heat exchanger 930 In order to evaporate the indoor heat exchanger 435, the second module heat exchanger 930 must dissipate heat while condensing the third main refrigerant.
  • the second regenerative refrigerant cycle absorbs the heat dissipation energy generated in this process, and the air discharge temperature generated when the second regenerative heat exchanger 470 radiates heat can be further increased. Accordingly, the amount of use of the dehumidification heater 365 can be further reduced.
  • outside air (OA) sucked in from the outside is heated while passing through the second regenerative heat exchanger (470) constituting the third air conditioning unit (U3), and the heated air is transferred to the first regenerative heat exchanger ( 450) can be transmitted in the direction (K3).
  • the air that previously passed through the dehumidifying rotor 460 is delivered in the direction K2 of the third indoor heat exchanger 430
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 are connected to each other. It goes through in order. In this process, the air undergoes 4th and 5th dehumidification and can have very low humidity. Additionally, air with reduced humidity can be supplied to the indoor space through the air supply opening (G3).
  • the second air conditioning mode can perform a dehumidifying and air heating function to increase the indoor temperature.
  • the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U1) The operation of the components constituting the air conditioning unit (U3) can be controlled (S420). Specifically, the first outdoor compressor 110, the second outdoor compressor 210, the third outdoor compressor 310, the first module compressor 710, and the second module compressor 910 are operated.
  • first regenerative heat exchanger 450, the second regenerative heat exchanger 470, the first module heat exchanger 730, and the second module heat exchanger 930 may each be operated as a condenser.
  • the indoor heat exchanger (435), the first recovery heat exchanger (410) and the second recovery heat exchanger (440) (350), and the first module heat exchanger (730) and the second module heat exchanger (930) are each used as an evaporator. It can work.
  • the first module heat exchanger 730 and the second module heat exchanger 930 may be configured as a plate-type heat exchanger, and therefore are condensers of the second main refrigerant and third main refrigerant and the first regenerative refrigerant and It can be an evaporator for the second regenerated refrigerant.
  • the refrigerant flow in the second air conditioning mode is indicated by an arrow
  • the first main refrigerant flow in the first air conditioning unit (U1) is shown in the form of a flowchart
  • the second air conditioning unit (U1) In U2), the second main refrigerant flow and the first regeneration refrigerant flow are shown in the form of a flowchart
  • the third main refrigerant flow and the second regeneration refrigerant flow in the third air conditioning unit (U3) are shown in the form of a flowchart. there is.
  • the first outdoor compressor 110 compresses the first main refrigerant
  • High-temperature/high-pressure refrigerant is discharged through the first compressor discharge pipe (L101). All of the discharged high-temperature/high-pressure first main refrigerant is transferred to the second indoor heat exchanger (425). That is, the second indoor heat exchanger 425 can be used as a condenser.
  • the first outdoor heat exchanger 130, the first recovery heat exchanger 410, and the first indoor heat exchanger 421 can each serve as an evaporator. there is.
  • the path through which the first main refrigerant flows to the second indoor heat exchanger 425 may be the first high pressure pipe.
  • the first high pressure pipe may be the first compressor discharge pipe (L101), the 1-1 outdoor unit connection pipe (L103), and the 1-2 distribution connection pipe (L119).
  • the first refrigerant distribution valve 510 of the first delivery module 500 is disposed between the 1-1 outdoor unit connection pipe (L103) and the 1-2 distribution connection pipe (L119), The first refrigerant distribution valve 510 can connect them.
  • the first main outdoor valve 150 may be in the OFF state, and the first sub-outdoor valve 160 may be in the ON state.
  • the first main refrigerant condensed in the second indoor heat exchanger (425) is in a medium temperature/high pressure state, and the first outdoor heat exchanger (130), the first recovery heat exchanger (410), and the first indoor heat exchanger It may be transmitted to each group 421.
  • the path of the first main refrigerant flowing to the first outdoor heat exchanger 130, the first recovery heat exchanger 410, and the first indoor heat exchanger 421 may be the first liquid pipe.
  • the 1-2 heat exchange connection pipe (L123) - the 1-2 outdoor heat exchange connection pipe (L121) is the first heat exchanger through which the first main refrigerant flows to the first outdoor heat exchanger (130).
  • the first indoor branch pipe (L125) - first indoor unit connection pipe (L128) becomes a first liquid pipe through which the first main refrigerant flows to the first recovery heat exchanger (410)
  • the first indoor branch pipe (L125)-1-1 indoor heat exchange connection pipe (L124) becomes the first liquid pipe through which the first main refrigerant flows to the first indoor heat exchanger (421).
  • the first outdoor expansion valve 135 is disposed in the first-second outdoor heat exchange connection pipe (L121), and the first main refrigerant is expanded in the first outdoor expansion valve 135 and the first main refrigerant is an evaporator. 1It can flow to the outdoor heat exchanger (130).
  • the first heat recovery expansion valve 415 is disposed in the first heat recovery connection pipe (L127), and the first main refrigerant is expanded in the first recovery expansion valve to the first recovery heat exchanger 410, which is an evaporator. can flow.
  • the first indoor expansion valve 423 is disposed in the 1-1 indoor heat exchange connection pipe (L124), and the first main refrigerant is expanded in the first indoor expansion valve 423 and the first main refrigerant is an evaporator. 1It can flow to the indoor heat exchanger (421).
  • the first indoor heat exchanger 421 Since the first indoor heat exchanger 421 functions as an evaporator, it can cool/dehumidify the air inside the indoor duct (S).
  • the outdoor air (OA) that is primarily cooled/dehumidified while passing through the first indoor heat exchanger 421 may be heated to some extent while passing through the second indoor heat exchanger 425.
  • the direction K1 in which the outside air (OA) passes through the first indoor heat exchanger 421 and the second indoor heat exchanger 425 is indicated by a thick arrow.
  • Refrigerant may be supplied to the first outdoor heat exchanger 130, the first recovery heat exchanger 410, and the first indoor heat exchanger 421 at different ratios.
  • the flow rate of the first main refrigerant condensed in the second indoor heat exchanger (425) is in the following order: first recovery heat exchanger (410) > first indoor heat exchanger (421) > first outdoor heat exchanger (130). can be passed on.
  • more than 50% of the first main refrigerant condensed in the second indoor heat exchanger (425) may be transferred to the first recovery heat exchanger (410).
  • the outdoor air (OA) that has been first and secondarily dehumidified by the primary indoor heat exchanger 420 continues to flow and is dehumidified thirdly while passing through the dehumidifying rotor 460, and finally, the third indoor heat exchanger ( It is dehumidified in the 4th and 5th stages by the 430) and the fourth indoor heat exchanger 435 to become supply air (SA), and can be supplied to the indoor space through the supply opening (G3).
  • SA supply air
  • the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110. Therefore, the first heat exchange induction pipe (L117) - the first heat exchange connection pipe (L116) - the first accumulator connection pipe (L111) - the first accumulator suction pipe (L113) may be the first low pressure pipe.
  • the low-temperature/low-pressure first main refrigerant discharged from the first recovery heat exchanger 410 flows into the first transfer module 500 through the first heat recovery connector (L127), and the first transfer module ( It can be joined to the first refrigerant heat exchanger 530 through the first refrigerant distribution valve 510 inside the 500). And, the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110.
  • the low-temperature/low-pressure first main refrigerant discharged from the first outdoor heat exchanger (130) is sent to the first accumulator (120) through the 1-1 outdoor heat exchange connection pipe (L102) and the first accumulator suction pipe (L113). After being supplied, it can be sucked back into the first outdoor compressor 110 through the first compressor suction pipe (L115).
  • the first refrigerant heat exchanger 530 is a low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 and the first recovery heat exchanger 410, and the second indoor heat exchanger ( The medium temperature/high pressure first main refrigerant condensed in 425) can be heat exchanged with each other.
  • the medium-temperature/high-pressure first main refrigerant condensed in the second indoor heat exchanger (425) passes through the first refrigerant heat exchanger (530) and the first indoor heat exchanger (421) and the first recovery heat exchanger (410). ) can radiate heat to the low-temperature/low-pressure first main refrigerant discharged from ).
  • the first main refrigerant in the medium temperature/high pressure liquid state is additionally supercooled and stabilized by the first refrigerant heat exchanger 530, or if the first main refrigerant from the condenser is in a two-phase state, the first main refrigerant is in a two-phase state. It can be supplied to the first outdoor heat exchanger (130) in a liquefied state by the refrigerant heat exchanger (530).
  • the first main refrigerant of the first recovery heat exchanger 410 can absorb heat from the exhaust EA while evaporating. That is, the first main refrigerant of the first recovery heat exchanger 410 can absorb heat from the exhaust EA while exchanging heat with the exhaust EA discharged through the first exhaust port G5.
  • the ventilation (RA) passing through the first recovery heat exchanger (410) and the refrigerant of the first recovery heat exchanger (410) absorbing heat from the exhaust (EA) are represented by thick arrows.
  • some of the air supplied to the first recovery heat exchanger 410 is ventilation (RA) drawn from the indoor space and has a temperature higher than the outside air temperature.
  • RA ventilation
  • the first main refrigerant of the first recovery heat exchanger (410) absorbs heat from the outside air rather than the ventilation ( It is effective to absorb heat from RA).
  • the first main refrigerant of the first recovery heat exchanger 410 can absorb heat more effectively by using the waste heat of the exhaust (EA). Accordingly, the amount of evaporative heat generated by the first recovery heat exchanger 410 increases, and the low operating pressure of the refrigeration cycle of the first air conditioning unit (U1) increases, thereby improving efficiency.
  • the second outdoor compressor 210 compresses the second main refrigerant , the high-temperature/high-pressure second main refrigerant is discharged to the second compressor discharge pipe (L201).
  • the entire discharged high-temperature/high-pressure second main refrigerant is transferred to the first module heat exchanger 730 of the first heat exchange module 700 through the second transfer module 600.
  • the first module heat exchanger 730 may be a condenser of the second main refrigerant cycle.
  • the path through which the refrigerant flows to the first heat exchange module 700 may be the second high pressure pipe.
  • the second high pressure pipe may be the second compressor discharge pipe (L201) - the 2-1 outdoor unit connection pipe (L203) - the 2-1 distribution connection pipe (L205).
  • the second refrigerant distribution valve 610 of the second delivery module 600 is disposed between the 2-1 outdoor unit connection pipe (L203) and the 2-1 distribution connection pipe (L205), The second refrigerant distribution valve 610 can connect them.
  • the second main outdoor valve 250 and the second sub-outdoor valve 260 can be viewed as OFF.
  • the second main refrigerant may exchange heat with the first regenerated refrigerant flowing through the first module heat exchanger (730).
  • the first regenerative heat exchanger 450 together with the first heat exchange module 700, may form a separate first regenerative refrigerant cycle that flows the first regenerative refrigerant.
  • heat generated in the first regenerative heat exchanger 450 which operates as a condenser, may be transferred to the dehumidification rotor 460.
  • the air introduced into the second external mechanism (G2), the air delivered through the second bypass (B2), and the air passing through the second regenerative heat exchanger (470) are transferred to the first regenerative heat exchanger (450). ), heat exchange occurs and the temperature may rise further.
  • the heated air can be delivered to the dehumidification rotor 460 to regenerate the dehumidification rotor 460. Accordingly, the amount of use of the regeneration heater 465 for regeneration of the dehumidification rotor 460 can be reduced, and as a result, the power consumption for driving the second air conditioning unit (U2) can be reduced.
  • the air radiated from the first regenerative heat exchanger 450 passing through the dehumidifying rotor 460 is represented by a thick arrow.
  • the first regenerative refrigerant may flow through the first regenerative refrigerant cycle composed of the first heat exchange module 700 and the first regenerative heat exchanger 450.
  • the first module compressor 710 discharges the compressed high-temperature/high-pressure first regenerative refrigerant to the discharge pipe L245 of the first module compressor 710.
  • the discharged high-temperature/high-pressure first regenerative refrigerant is transferred to the first regenerative heat exchanger 450, and the first regenerative heat exchanger 450 can condense the first regenerative refrigerant.
  • the first regenerative refrigerant radiates heat, and after dissipating heat, the first regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. Then, the first regenerative refrigerant is delivered to the first module expansion valve 740 through the first regenerative heat exchange connection pipe (L247) and expanded, and then through the first module heat exchange connection pipe (L248) to the first module heat exchanger. It may be delivered to (730) and evaporated. The evaporated first regenerated refrigerant may be delivered to the first module accumulator through the first module accumulator suction pipe (L241).
  • the second main refrigerant and the first regenerated refrigerant passing through the first module heat exchanger 730 may exchange heat with each other.
  • the second main refrigerant may be condensed in the first module heat exchanger 730, radiating heat to the first regenerated refrigerant, and converted into a liquid phase. Accordingly, the second main refrigerant can dissipate heat more effectively, and the operating high pressure of the second main refrigerant cycle of the second air conditioning unit (U2) is lowered, improving efficiency and reducing power consumption.
  • the first regenerated refrigerant may absorb heat from the second main refrigerant flowing through the first module heat exchanger 730.
  • the operating low pressure of the first regenerative refrigerant cycle constituting the second air conditioning unit (U2) increases, thereby reducing power consumption.
  • the air blowing temperature of the first regenerative heat exchanger 450 which constitutes the first regenerative refrigerant cycle, can be increased to about 80°C or higher and used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. In this way, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.
  • the air heated while passing through the second regenerative heat exchanger 470 constituting the third air conditioning unit (U3) may be transferred in the direction K3 to the first regenerative heat exchanger 450.
  • the air flow is represented by a thick arrow.
  • the air delivered in the direction K3 of the first regenerative heat exchanger 450 may be delivered to the dehumidifying rotor 460 in a state in which its temperature is raised again by the first regenerative heat exchanger 450.
  • the air regenerated to high temperature by the dehumidification rotor 460 may be delivered to the second recovery heat exchanger 440. Air that has passed through the second recovery heat exchanger 440 may be exhausted (EA).
  • part of the second main refrigerant condensed while exchanging heat while passing through the second module heat exchanger 930 may be transferred to the second recovery heat exchanger 440 and evaporated, and the remaining part may be transferred to the second outdoor heat exchanger. It can be transmitted and evaporated.
  • the medium-temperature/high-pressure second main refrigerant condensed in the first module heat exchanger (730) may be evaporated in the second recovery heat exchanger (440) and the second outdoor heat exchanger (230).
  • the path of the refrigerant flowing to the second recovery heat exchanger 440 and the second outdoor heat exchanger 230 may be the second liquid pipe.
  • the first main connection pipe (L224) becomes a second liquid pipe through which the second main refrigerant flows to the second recovery heat exchanger (440).
  • the first module connection pipe (L223) - the 2-2 outdoor unit connection pipe (L222) becomes a second liquid pipe through which the second main refrigerant flows to the second outdoor heat exchanger (230).
  • the second main refrigerant of the second recovery heat exchanger (440) may absorb heat from the exhaust (EA) discharged to the outside from the indoor unit (400). Since the exhaust air (EA) has a higher temperature than the outside air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the second air conditioning unit (U2) increases, thereby reducing power consumption.
  • the second recovery heat exchanger (440) utilizes the temperature of the exhaust (EA) when operating as an evaporator, thereby reducing the power consumption required to operate the refrigeration cycle of the second air conditioning unit (U2). can do.
  • the low-temperature/low-pressure second main refrigerant evaporated in the second recovery heat exchanger 440 may flow into the second transfer module 600 through the second heat exchange transfer pipe (L217).
  • the air that has passed through the second indoor heat exchanger 425 may flow in the direction K1 of the dehumidifying rotor 460 and be dehumidified while passing through the dehumidifying rotor 460.
  • the air dehumidified in this way can be delivered in the direction K2 to the third indoor heat exchanger 430.
  • the air passing through the dehumidifying rotor 460 is represented by a thick arrow.
  • a part of the dehumidifying rotor 460 may be disposed along the air flow direction inside the indoor duct (S). Accordingly, the dehumidification rotor 460 re-dehumidifies the outdoor air (OA) that previously passed through the first indoor heat exchanger 421 and the second indoor heat exchanger 425, so that continuous dehumidification is performed a total of three times to maintain the outdoor air.
  • the humidity of (OA) can be lowered to a very low level.
  • the third outdoor compressor 310 compresses the third main refrigerant.
  • the high-temperature/high-pressure third main refrigerant is discharged to the third compressor discharge pipe (L301). All of the discharged high-temperature/high-pressure third main refrigerant is transferred to the second module heat exchanger 930 through the third transfer module 800, and the second module heat exchanger 930 can be used as a condenser.
  • the path through which the third main refrigerant flows to the second module heat exchanger 930 may be the second high pressure pipe.
  • the second high pressure pipe may be the third compressor discharge pipe (L301) - the 3-1 outdoor unit connection pipe (L303) - the 3-1 distribution connection pipe (L305).
  • the third refrigerant distribution valve 810 of the third delivery module 800 is disposed between the 3-1 outdoor unit connection pipe (L303) and the 3-1 distribution connection pipe (L305), The third refrigerant distribution valve 810 can connect them.
  • the third main refrigerant condensed in the second module heat exchanger (930) is in a medium temperature/high pressure state, and the third outdoor heat exchanger (330), the third indoor heat exchanger (430), and the fourth indoor heat exchanger It can be sent to (435).
  • the low-temperature/low-pressure third main refrigerant evaporated from the third and fourth indoor heat exchangers (430, 435) is flowing through the third refrigerant heat exchanger (830). Therefore, the medium-temperature/high-pressure third main refrigerant previously condensed by the second module heat exchanger 930 radiates heat (heat exchange) to the low-temperature/low-pressure third main refrigerant when passing through the third refrigerant heat exchanger 830. ) and then converted into liquid refrigerant, it can be delivered to the third outdoor heat exchanger (330).
  • the path of the third main refrigerant flowing into the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the path of the third main refrigerant flowing into the third outdoor heat exchanger 330 are the third It can be a liquid pipe.
  • the fourth heat exchange transmission pipe (L324) becomes a third liquid pipe through which refrigerant flows to the third indoor heat exchanger (430) and the fourth indoor heat exchanger (435).
  • the second main connection pipe (L323) - the 3-2 outdoor unit connection pipe (L322) becomes a third liquid pipe through which refrigerant flows to the third indoor heat exchanger (430).
  • the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidification rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger ( 435) may be arranged continuously along the air flow direction inside the indoor duct (S). Accordingly, the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidification rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are The humidity of the outdoor air (OA) can be greatly reduced by continuously dehumidifying the outdoor air (OA) a total of five times.
  • the low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 flows into the third transfer module 800 through the third heat exchange transfer pipe (L317), and the third transfer module 800 ) can be transmitted to the third refrigerant heat exchanger (830) through the third heat exchange connection pipe (L316).
  • the low-temperature/low-pressure third main refrigerant discharged from the fourth indoor heat exchanger (435) flows into the third transfer module (800) through the third-2 distribution connector (L319), and the third main refrigerant is discharged from the fourth indoor heat exchanger (435).
  • the refrigerant may be transferred to the third refrigerant heat exchanger 830 via the third refrigerant distribution valve 810.
  • the third main refrigerant that has passed through the third refrigerant heat exchanger (830) is supplied to the third accumulator (420) through the third accumulator connection pipe (L311) and the third accumulator suction pipe (L313). It can be sucked back into the third outdoor compressor (310) through the third compressor suction pipe (L315). Therefore, the 3-2 distribution connection pipe (L319) - the 3rd heat exchange connection pipe (L316) - the 3rd accumulator connection pipe (L311) - the 3rd accumulator suction pipe (L313) can be a third low pressure pipe.
  • the 3-2 outdoor heat exchange connection pipe (L321) and the 3-1 outdoor heat exchange connection pipe (L302) passing through the third outdoor heat exchanger (330) may also serve as third low-pressure pipes.
  • the third refrigerant heat exchanger 830 is a low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the second module heat exchanger.
  • the medium temperature/high pressure liquid third main refrigerant condensed in (930) can be heat exchanged with each other.
  • the medium-temperature/high-pressure third main refrigerant condensed in the second module heat exchanger 930 passes through the third refrigerant heat exchanger 830 and is transferred to the third indoor heat exchanger 430 and the fourth indoor heat exchanger ( Heat can be dissipated in the low temperature/low pressure refrigerant discharged from 435). Accordingly, the third main refrigerant of medium temperature/high pressure can be supplied to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 in the state of a liquid refrigerant.
  • the second regenerative refrigerant may flow through the second regenerative refrigerant cycle composed of the second heat exchange module 900 and the second regenerative heat exchanger 470.
  • the second module compressor 910 discharges the compressed high-temperature/high-pressure second regenerative refrigerant to the discharge pipe L345 of the second module compressor 910.
  • the discharged high-temperature/high-pressure second regenerative refrigerant is transferred to the second regenerative heat exchanger 470, and the second regenerative heat exchanger 470 can condense the second regenerative refrigerant.
  • the second regenerative refrigerant radiates heat, and after dissipating heat, the second regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant.
  • the second regenerative refrigerant may be transferred to the second module expansion valve 940 through the second regenerative heat exchange connection pipe L347 and expanded, and then transferred to the second module heat exchanger 930 to be evaporated.
  • the evaporated second regenerated refrigerant may be delivered to the second module accumulator through the second module accumulator suction pipe (L341).
  • the third main refrigerant and the second regenerative refrigerant passing through the second module heat exchanger 930 may exchange heat with each other.
  • the third main refrigerant may be condensed in the second module heat exchanger 930, radiating heat to the second regenerated refrigerant, and converted into a liquid phase. Accordingly, the third main refrigerant can dissipate heat more effectively, and the operating high pressure of the third main refrigerant cycle of the third air conditioning unit (U3) is lowered, improving efficiency and reducing power consumption.
  • the second regenerated refrigerant can absorb heat from the third main refrigerant flowing through the second module heat exchanger 930.
  • the operating low pressure of the second regenerative refrigerant cycle constituting the third air conditioning unit (U3) increases, thereby reducing power consumption.
  • the air blowing temperature of the second regenerative heat exchanger 470 which constitutes the second regenerative refrigerant cycle, can be increased to about 50°C or higher and delivered in the direction K3 to the first regenerative heat exchanger 450.
  • the air delivered in this way can be used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. Therefore, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.
  • the third main refrigerant cools/dehumidifies the air while evaporating in the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.
  • the second module heat exchanger 930 In order to evaporate the indoor heat exchanger 435, the second module heat exchanger 930 must dissipate heat while condensing the third main refrigerant.
  • the second regenerative refrigerant cycle absorbs the heat dissipation energy generated in this process, and the air discharge temperature generated when the second regenerative heat exchanger dissipates heat can be further increased. Accordingly, the amount of use of the dehumidification heater 365 can be further reduced.
  • outside air (OA) sucked in from the outside is heated while passing through the second regenerative heat exchanger (470) constituting the third air conditioning unit (U3), and the heated air is transferred to the first regenerative heat exchanger ( 450) can be transmitted in the direction (K3).
  • the air that previously passed through the dehumidifying rotor 460 is delivered in the direction K2 of the third indoor heat exchanger 430
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 are connected to each other. It goes through in order. In this process, the air undergoes 4th and 5th dehumidification and can have very low humidity. Additionally, air with reduced humidity can be supplied to the indoor space through the air supply opening (G3).
  • the third air conditioning mode will be described.
  • the third air conditioning mode is selected (S320)
  • the operation of the components constituting the air conditioning unit (U3) can be controlled (S420). Specifically, the first outdoor compressor 110, the second outdoor compressor 210, the third outdoor compressor 310, the first module compressor 710, and the second module compressor 910 are operated.
  • the first module heat exchanger 730 and the second module heat exchanger 930 may each be operated as a condenser.
  • the second outdoor heat exchanger (230), the first indoor heat exchanger (421), the second indoor heat exchanger (425) (322), the third indoor heat exchanger (430), and the fourth indoor heat exchanger (435) ), the second recovery heat exchanger (440) (350), and the first module heat exchanger (730) and second module heat exchanger (930) may each be operated as an evaporator.
  • the first module heat exchanger 730 and the second module heat exchanger 930 may be configured as a plate-type heat exchanger, and therefore are condensers of the second main refrigerant and the third main refrigerant and the first regenerative refrigerant, It may be an evaporator of the regenerated refrigerant of the second regenerated refrigerant.
  • the third air conditioning mode can perform a dehumidifying and air cooling function to lower the indoor temperature.
  • the main refrigerant flow and the regenerative refrigerant flow in the third air conditioning mode are indicated by arrows
  • the first main refrigerant flow in the first air conditioning unit (U1) is shown in the form of a flow chart
  • the second main refrigerant flow and the first regenerated refrigerant in the second air conditioning unit (U2) are shown in the form of a flow chart
  • the third main refrigerant flow and the second regenerative refrigerant flow in the third air conditioning unit (U3) are shown in the form of a flow chart.
  • the first outdoor compressor (110) compresses the first main refrigerant
  • the high-pressure first main refrigerant is discharged through the first compressor discharge pipe (L101).
  • Some of the discharged high-temperature/high-pressure first main refrigerant is transferred to the first recovery heat exchanger (410), and the remaining part is transferred to the first outdoor heat exchanger (130). That is, the first recovery heat exchanger 410 and the first outdoor heat exchanger 130 can each be used as a condenser.
  • the path through which the refrigerant flows into the first recovery heat exchanger 410 may be the first high pressure pipe.
  • the first high pressure pipe may be the first compressor discharge pipe (L101), the 1-1 outdoor unit connection pipe (L103), and the 1-1 distribution connection pipe (L105).
  • the first refrigerant distribution valve 510 of the first delivery module 500 is disposed between the 1-1 outdoor unit connection pipe (L103) and the 1-1 distribution connection pipe (L105), The first refrigerant distribution valve 510 can connect them.
  • the path through which the refrigerant flows into the first outdoor heat exchanger 130 may also be the first high pressure pipe.
  • the first high pressure pipe may be the first compressor discharge pipe (L101)-1-1 outdoor heat exchange connection pipe (L102).
  • L101 first compressor discharge pipe
  • L102 first outdoor heat exchange connection pipe
  • the first main refrigerant may be supplied to the first recovery heat exchanger 410 at a flow rate greater than that of the first outdoor heat exchanger 130. For example, about 70% of the first main refrigerant may be supplied to the first recovery heat exchanger 410, and about 30% of the first main refrigerant may be supplied to the first outdoor heat exchanger 130.
  • the first main refrigerant condensed in the first recovery heat exchanger 410 is in a medium temperature/high pressure state and can be transferred to the first indoor heat exchanger 421 and the second indoor heat exchanger 425.
  • the path of the first main refrigerant flowing to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be the first liquid pipe.
  • the first indoor unit connection pipe (L128) becomes the first liquid pipe through which the refrigerant flows to the first indoor heat exchanger 421, and the first indoor unit connection pipe (L128) - first indoor branch pipe ( L125) becomes the first liquid pipe through which the refrigerant flows to the second indoor heat exchanger (425).
  • the first indoor expansion valve 423 is disposed on the 1-1 indoor heat exchange connection pipe (L124), and the refrigerant is expanded in the first indoor expansion valve 423 in the first indoor heat exchanger 421, which is an evaporator. ) can flow.
  • the second indoor expansion valve 427 is disposed in the first-second indoor heat exchange connection pipe (L126), and the first main refrigerant is expanded in the second indoor expansion valve 427 and is used in the second indoor heat exchanger, which is an evaporator. It can flow into the group 425.
  • first indoor heat exchanger 421 and the second indoor heat exchanger 425 each function as an evaporator, they can cool/dehumidify the air inside the indoor duct (S).
  • Outdoor air (OA) that is primarily cooled/dehumidified while passing through the first indoor heat exchanger 421 may be secondarily cooled/dehumidified while passing through the second indoor heat exchanger 425.
  • the outside air (OA) passing through the first indoor heat exchanger 421 and the second indoor heat exchanger 425 is represented by a thick arrow.
  • the first main refrigerant may be supplied to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 at different ratios.
  • a larger amount of first main refrigerant may be supplied to the first indoor heat exchanger 421, which is close to the first recovery heat exchanger 410, than to the second indoor heat exchanger 425. This is because a larger amount of first main refrigerant was supplied to the first recovery heat exchanger 410 than to the first outdoor heat exchanger 130 under the control of the control unit 1000.
  • about 70% of the first main refrigerant may be supplied to the first indoor heat exchanger 421, and about 30% of the first main refrigerant may be supplied to the second indoor heat exchanger 425.
  • the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be arranged side by side along the air flow direction inside the indoor duct (S). Accordingly, the first indoor heat exchanger 421 and the second indoor heat exchanger 425 can continuously cool/dehumidify the outside air (OA).
  • the outdoor air (OA) cooled by the first indoor heat exchanger 421 and the second indoor heat exchanger 425 continues to flow and is dehumidified three times while passing through the dehumidifying rotor 460, and finally, the third indoor heat exchanger 425 It is cooled/dehumidified in the 4th and 5th stages by the indoor heat exchanger 430 and the fourth indoor heat exchanger 435 to become supply air (SA), and can be supplied to the indoor space through the supply opening (G3).
  • SA supply air
  • the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110. Therefore, the first heat exchange induction pipe (L117) - the first heat exchange connection pipe (L116) - the first accumulator connection pipe (L111) - the first accumulator suction pipe (L113) may be the first low pressure pipe.
  • the first refrigerant heat exchanger 530 is a low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 and the second indoor heat exchanger 425, and the first outdoor heat exchanger ( The medium temperature/high pressure first main refrigerant condensed in 130) can be heat exchanged with each other.
  • the medium-temperature/high-pressure first main refrigerant condensed in the first outdoor heat exchanger (130) passes through the first refrigerant heat exchanger (530) to the first indoor heat exchanger (421) and the second indoor heat exchanger (425). Heat can be dissipated (heat exchanged) into the low-temperature/low-pressure first main refrigerant discharged from .
  • the first main refrigerant of medium temperature/high pressure can be supplied to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 in the state of liquid refrigerant.
  • the first recovery heat exchanger 410 operates as a condenser and the first main refrigerant of the first recovery heat exchanger 410 flows toward the exhaust (EA). It can dissipate heat. That is, the first main refrigerant of the first recovery heat exchanger 410 can radiate heat to the exhaust EA while exchanging heat with the exhaust EA discharged through the first exhaust port G5.
  • the ventilation (RA) passes through the first recovery heat exchanger (410) and the first main refrigerant of the first recovery heat exchanger (410) radiates heat to the exhaust (EA), which is represented by a bold arrow. It is done.
  • some of the air supplied to the first recovery heat exchanger 410 is ventilation (RA) drawn from the indoor space and has a temperature lower than the outside air temperature.
  • RA ventilation
  • the exhaust air (EA) that exchanges heat with the first recovery heat exchanger (410) has a lower temperature than the outside air
  • heat dissipation of the first main refrigerant passing through the first recovery heat exchanger (410) can be performed more effectively.
  • the first main refrigerant of the first recovery heat exchanger 410 is more effectively dissipated by using the waste heat of the exhaust (EA). Accordingly, the high operating pressure of the refrigeration cycle of the first air conditioning unit (U1) is lowered, thereby improving efficiency and reducing power consumption.
  • the air that exchanges heat with the first main refrigerant of the first recovery heat exchanger 410 is ventilation (RA) supplied from indoors, so its temperature is lower than that of the outside air, and therefore heat can be dissipated smoothly without overload.
  • RA ventilation
  • the first heat recovery expansion valve 415 may be disposed in the first heat recovery connector L127 connected to the first recovery heat exchanger 410.
  • the control unit 1000 can control the flow rate of the high-temperature/high-pressure first main refrigerant supplied to the first recovery heat exchanger 410 by adjusting the opening rate of the first heat recovery expansion valve 415. Since the high-temperature/high-pressure first main refrigerant flow rate discharged from the first outdoor compressor 110 is determined, when the first main refrigerant flow rate supplied to the first recovery heat exchanger 410 is adjusted, the first outdoor heat exchanger 410 The flow rate of the first main refrigerant supplied to (130) can also be adjusted. By adjusting the refrigerant flow rate, the degree of recovery of waste heat through the first recovery heat exchanger 410 can be adjusted.
  • the first recovery heat exchanger (410) operates as a condenser and the first recovery heat exchanger (410) operates as a condenser. It is more effective for the first main refrigerant of the single recovery heat exchanger (410) to radiate heat to the ventilation (RA) than to radiate heat to the outside air.
  • the first recovery heat exchanger (410) operates as a condenser and the first recovery heat exchanger Dissipation of heat by the first main refrigerant of the unit 410 to the ventilation RA is less efficient than dissipation of heat to external air.
  • the opening rate of the first heat recovery expansion valve 415 is adjusted to reduce the flow rate of the first main refrigerant flowing into the first recovery heat exchanger 410, which is a condenser, and the first outdoor heat exchanger 130, which is another condenser. ), heat dissipation efficiency can be increased by increasing the flow rate of the first main refrigerant flowing into the system.
  • the second outdoor compressor (210) compresses the second main refrigerant, /Discharge the high-pressure second main refrigerant to the second compressor discharge pipe (L201).
  • the entire discharged high-temperature/high-pressure second main refrigerant is transferred to the first heat exchange module 700 of the first heat exchange module 700 through the second transfer module 600.
  • the first module heat exchanger 730 may be a condenser of the second main refrigerant cycle.
  • the path through which the second main refrigerant flows to the first heat exchange module 700 may be the second high pressure pipe.
  • the second high pressure pipe may be the second compressor discharge pipe (L201) - the 2-1 outdoor unit connection pipe (L203) - the 2-1 distribution connection pipe (L205).
  • the second refrigerant distribution valve 610 of the second delivery module 600 is disposed between the 2-1 outdoor unit connection pipe (L203) and the 2-1 distribution connection pipe (L205), The second refrigerant distribution valve 610 can connect them.
  • the second main outdoor valve 250 and the second sub-outdoor valve 260 can be viewed as OFF.
  • the second main refrigerant may exchange heat with the first regenerated refrigerant flowing through the first module heat exchanger (730).
  • the first regenerative heat exchanger 450 together with the first heat exchange module 700, may form a separate first regenerative refrigerant cycle that flows the first regenerative refrigerant.
  • heat generated in the first regenerative heat exchanger 450 which operates as a condenser, may be transferred to the dehumidification rotor 460.
  • the air introduced into the second external mechanism (G2), the air delivered through the second bypass (B2), and the air passing through the second regenerative heat exchanger (470) are transferred to the first regenerative heat exchanger (450). ), heat exchange occurs and the temperature may rise further.
  • the heated air can be delivered to the dehumidification rotor 460 to regenerate the dehumidification rotor 460. Accordingly, the amount of use of the regeneration heater 465 for regeneration of the dehumidification rotor 460 can be reduced, and as a result, the power consumption for driving the second air conditioning unit (U2) can be reduced.
  • the air radiated from the first regenerative heat exchanger 450 passing through the dehumidifying rotor 460 is represented by a thick arrow.
  • the first regenerative refrigerant may flow through the first regenerative refrigerant cycle composed of the first heat exchange module 700 and the first regenerative heat exchanger 450.
  • the first module compressor 710 discharges the compressed high-temperature/high-pressure first regenerative refrigerant to the discharge pipe L245 of the first module compressor 710.
  • the discharged high-temperature/high-pressure first regenerative refrigerant is transferred to the first regenerative heat exchanger 450, and the first regenerative heat exchanger 450 can condense the first regenerative refrigerant.
  • the first regenerative refrigerant radiates heat, and after dissipating heat, the first regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. Then, the first regenerative refrigerant is delivered to the first module expansion valve 740 through the first regenerative heat exchange connection pipe (L247) and expanded, and then through the first module heat exchange connection pipe (L248) to the first module heat exchanger. It may be delivered to (730) and evaporated. The evaporated first regenerated refrigerant may be delivered to the first module accumulator through the first module accumulator suction pipe (L241).
  • the second main refrigerant and the first regenerated refrigerant passing through the first module heat exchanger 730 may exchange heat with each other.
  • the second main refrigerant may be condensed in the first module heat exchanger 730, radiating heat to the first regenerated refrigerant, and converted into a liquid phase. Accordingly, the second main refrigerant can dissipate heat more effectively, and the operating high pressure of the second main refrigerant cycle of the second air conditioning unit (U2) is lowered, improving efficiency and reducing power consumption.
  • the first regenerated refrigerant may absorb heat from the second main refrigerant flowing through the first module heat exchanger 730.
  • the operating low pressure of the first regenerative refrigerant cycle constituting the second air conditioning unit (U2) increases, thereby reducing power consumption.
  • the air discharge temperature of the first regenerative heat exchanger 450 which constitutes the first regenerative refrigerant cycle, can be increased to about 60°C or higher and used as regenerative energy for the high-temperature regenerative dehumidification rotor 460. In this way, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.
  • air heated while passing through the second regenerative heat exchanger 470 constituting the third air conditioning unit (U3) may be transferred in the direction K3 of the first regenerative heat exchanger 450.
  • the air flow is represented by a thick arrow.
  • the air delivered in the direction K3 of the first regenerative heat exchanger 450 may be delivered to the dehumidifying rotor 460 in a state in which its temperature is raised again by the first regenerative heat exchanger 450.
  • the air regenerated to high temperature by the dehumidification rotor 460 may be delivered to the second recovery heat exchanger 440. Air that has passed through the second recovery heat exchanger 440 may be exhausted (EA).
  • part of the second main refrigerant condensed while exchanging heat while passing through the second module heat exchanger 930 may be transferred to the second recovery heat exchanger 440 and evaporated, and the remaining part may be transferred to the second outdoor heat exchanger. It can be transmitted and evaporated.
  • the medium-temperature/high-pressure second main refrigerant condensed in the first module heat exchanger (730) may be evaporated in the second recovery heat exchanger (440) and the second outdoor heat exchanger (230).
  • the path of the refrigerant flowing to the second recovery heat exchanger 440 and the second outdoor heat exchanger 230 may be the second liquid pipe.
  • first main connection pipe (L224) and the second heat recovery connection pipe (L225) become a second liquid pipe through which the second main refrigerant flows to the second recovery heat exchanger (440).
  • first module connection pipe (L223) - the 2-2 outdoor unit connection pipe (L222) becomes a second liquid pipe through which the second main refrigerant flows to the second outdoor heat exchanger (230).
  • the second main refrigerant of the second recovery heat exchanger (440) may absorb heat from the exhaust (EA) discharged to the outside from the indoor unit (400). At this time, since the temperature of the exhaust EA is higher than that of the external air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the second air conditioning unit (U2) increases, thereby reducing power consumption.
  • the second recovery heat exchanger (440) utilizes the temperature of the exhaust (EA) when operating as an evaporator, thereby reducing the power consumption required to operate the refrigeration cycle of the second air conditioning unit (U2). can do.
  • the low-temperature/low-pressure second main refrigerant evaporated in the second recovery heat exchanger 440 may flow into the second transfer module 600 through the second heat exchange transfer pipe (L217).
  • the second main refrigerant that has passed through the second refrigerant heat exchanger 630 through the second heat exchange connector L216 can be sucked into the second outdoor compressor 210 through the second accumulator. Therefore, the second heat exchange transmission pipe (L217) - the second heat exchange connection pipe (L216) - the second accumulator connection pipe (L211) - the second accumulator suction pipe (L213) may be the second low pressure pipe.
  • the air that has passed through the second indoor heat exchanger 425 may flow in the direction K1 of the dehumidifying rotor 460 and be dehumidified while passing through the dehumidifying rotor 460.
  • the air dehumidified in this way can be delivered in the direction K2 of the third indoor heat exchanger 430. 12 and 14, the air passing through the dehumidifying rotor 460 is represented by a thick arrow.
  • a part of the dehumidifying rotor 460 may be disposed along the air flow direction inside the indoor duct (S). Accordingly, the dehumidification rotor 460 re-dehumidifies the outdoor air (OA) that previously passed through the first indoor heat exchanger 421 and the second indoor heat exchanger 425, so that continuous dehumidification is performed a total of three times to maintain the outdoor air.
  • the humidity of (OA) can be lowered to a very low level.
  • the third outdoor compressor 310 compresses the third main refrigerant.
  • the high-temperature/high-pressure third main refrigerant is discharged to the third compressor discharge pipe (L301).
  • Some of the discharged high-temperature/high-pressure third main refrigerant is transferred to the second module heat exchanger (930) through the third transfer module (800), and the remaining part is transferred to the three outdoor heat exchangers (330).
  • the second module heat exchanger 930 and the third outdoor heat exchanger 330 may each be used as a condenser.
  • the path through which the refrigerant flows into the second module heat exchanger 930 may be the second high pressure pipe.
  • the second high pressure pipe may be the third compressor discharge pipe (L301) - the 3-1 outdoor unit connection pipe (L303) - the 3-1 distribution connection pipe (L305).
  • the third refrigerant distribution valve 810 of the third delivery module 800 is disposed between the 3-1 outdoor unit connection pipe (L303) and the 3-1 distribution connection pipe (L305), The third refrigerant distribution valve 810 can connect them.
  • the third main refrigerant condensed in the second module heat exchanger 930 is in a medium temperature/high pressure state and can be delivered to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.
  • the third main refrigerant condensed by the third outdoor heat exchanger 330 passes through the third refrigerant heat exchanger 830 and is mixed with the third main refrigerant condensed in the second module heat exchanger 930. You can.
  • the third main refrigerant mixed in this way can be delivered to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.
  • the low-temperature/low-pressure third main refrigerant evaporated from the third and fourth indoor heat exchangers (430, 435) is flowing through the third refrigerant heat exchanger (830). Therefore, the medium-temperature/high-pressure third main refrigerant previously condensed by the third outdoor heat exchanger 330 radiates heat (heat exchange) to the low-temperature/low-pressure third main refrigerant when passing through the third refrigerant heat exchanger 830. After being converted to a liquid refrigerant, it can be mixed with the third main refrigerant condensed in the second module heat exchanger (930).
  • the path of the refrigerant flowing into the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be a third liquid pipe.
  • the 3-2 outdoor unit connection pipe (L322) - the 2nd main connection pipe (L323) - the 4th heat exchange transmission pipe (L324) is connected to the 3rd indoor heat exchanger 430 and the 4th indoor heat exchanger ( 435), which becomes the third liquid pipe through which the refrigerant flows.
  • the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidifying rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are installed in the indoor space. Inside the duct (S), they may be arranged continuously along the direction of air flow. Accordingly, the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidification rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are The humidity of the outdoor air (OA) can be greatly reduced by continuously dehumidifying the outdoor air (OA) a total of five times.
  • the low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 flows into the third transfer module 800 through the third heat exchange transfer pipe (L317), and the third transfer module 800 ) can be transmitted to the third refrigerant heat exchanger (830) through the third heat exchange connection pipe (L316).
  • the low-temperature/low-pressure third main refrigerant discharged from the fourth indoor heat exchanger (435) flows into the third transfer module (800) through the third-2 distribution connector (L319), and the third main refrigerant is discharged from the fourth indoor heat exchanger (435).
  • the refrigerant may be transferred to the third refrigerant heat exchanger 830 via the third refrigerant distribution valve 810.
  • the third main refrigerant that has passed through the third refrigerant heat exchanger (830) is supplied to the third accumulator (420) through the third accumulator connection pipe (L311) and the third accumulator suction pipe (L313). It can be sucked back into the third outdoor compressor (310) through the third compressor suction pipe (L315). Therefore, the 3-2 distribution connection pipe (L319) - the 3rd heat exchange connection pipe (L316) - the 3rd accumulator connection pipe (L311) - the 3rd accumulator suction pipe (L313) can be a third low pressure pipe.
  • the third refrigerant heat exchanger 830 is a low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the third outdoor heat exchanger.
  • the medium temperature/high pressure refrigerant condensed in (330) can exchange heat with each other.
  • the medium-temperature/high-pressure refrigerant condensed in the third outdoor heat exchanger (330) passes through the third refrigerant heat exchanger (830) and is discharged from the third indoor heat exchanger (430) and the fourth indoor heat exchanger (435). It can dissipate heat in low temperature/low pressure refrigerant. Accordingly, the third main refrigerant of medium temperature/high pressure can be supplied to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 in the state of a liquid refrigerant.
  • the second regenerative refrigerant may flow through the second regenerative refrigerant cycle composed of the second heat exchange module 900 and the second regenerative heat exchanger 470.
  • the second module compressor 910 discharges the compressed high-temperature/high-pressure second regenerative refrigerant to the discharge pipe L345 of the second module compressor 910.
  • the discharged high-temperature/high-pressure second regenerative refrigerant is transferred to the second regenerative heat exchanger 470, and the second regenerative heat exchanger 470 can condense the second regenerative refrigerant.
  • the second regenerative refrigerant radiates heat, and after dissipating heat, the second regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant.
  • the second regenerative refrigerant may be transferred to the second module expansion valve 940 through the second regenerative heat exchange connection pipe L347 and expanded, and then transferred to the second module heat exchanger 930 to be evaporated.
  • the evaporated second regenerated refrigerant may be delivered to the second module accumulator through the second module accumulator suction pipe (L341).
  • the third main refrigerant and the second regenerative refrigerant passing through the second module heat exchanger 930 may exchange heat with each other.
  • the third main refrigerant may be condensed in the second module heat exchanger 930, radiating heat to the second regenerated refrigerant, and converted into a liquid phase. Accordingly, the third main refrigerant can dissipate heat more effectively, and the operating high pressure of the third main refrigerant cycle of the third air conditioning unit (U3) is lowered, improving efficiency and reducing power consumption.
  • the second regenerated refrigerant can absorb heat from the third main refrigerant flowing through the second module heat exchanger 930.
  • the operating low pressure of the second regenerative refrigerant cycle constituting the third air conditioning unit (U3) increases, thereby reducing power consumption.
  • the air blowing temperature of the second regenerative heat exchanger 470 which constitutes the second regenerative refrigerant cycle, can be increased to about 40°C or higher and delivered in the direction K3 to the first regenerative heat exchanger 450.
  • the air delivered in this way can be used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. Therefore, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.
  • the third main refrigerant cools/dehumidifies the air while evaporating in the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.
  • the second module heat exchanger 930 In order to evaporate the indoor heat exchanger 435, the second module heat exchanger 930 must dissipate heat while condensing the third main refrigerant.
  • the second regenerative refrigerant cycle absorbs the heat dissipation energy generated in this process, and the air discharge temperature generated when the second regenerative heat exchanger dissipates heat can be further increased. Accordingly, the amount of use of the dehumidification heater 365 can be further reduced.
  • outside air (OA) sucked in from the outside is heated while passing through the second regenerative heat exchanger 470 constituting the third air conditioning unit (U3), and the heated air is transferred to the first regenerative heat exchanger ( It can be transmitted in the direction (K3) of 450).
  • the air that previously passed through the dehumidifying rotor 460 is delivered in the direction K2 of the third indoor heat exchanger 430
  • the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 are connected to each other. It goes through in order. In this process, the air undergoes 4th and 5th dehumidification and can have very low humidity. Additionally, air with reduced humidity can be supplied to the indoor space through the air supply opening (G3).
  • FIG 16 shows a schematic configuration of a second embodiment of the air conditioner of the present invention.
  • the third air conditioning unit (U3) can be omitted. That is, the air conditioner of the second embodiment can be composed of only the first air conditioning unit (U1) and the second air conditioning unit (U2).
  • the outside air (OA) may be dehumidified three times as it passes through the first indoor heat exchanger 421, the second indoor heat exchanger 425, and the dehumidification rotor 460.
  • the second air conditioning unit (U2) may include the first heat exchange module 700.
  • the first heat exchange module 700 can flow the independent first regenerative refrigerant and exchange heat with the second main refrigerant discharged from the second outdoor compressor 210.
  • FIG. 17 shows a schematic configuration of a third embodiment of the air conditioner of the present invention.
  • the heat exchangers included in the indoor unit 400 may be two heat exchangers connected in parallel.
  • the first recovery heat exchanger 1410 may include a 1-1 recovery heat exchanger 1410a and a 1-2 recovery heat exchanger 1410b arranged in parallel.
  • the first indoor heat exchanger (1421) can also form one first indoor heat exchanger (1421) by arranging the 1-1 indoor heat exchanger (1421a) and the 1-2 indoor heat exchanger (1421b) in parallel. .
  • the air conditioner can be applied to larger buildings or factories.
  • FIGS. 18 to 20 The structure for configuring a plurality of heat exchangers in parallel like this is shown in FIGS. 18 to 20.
  • the first recovery heat exchanger 1410 is depicted as consisting of a 1-1 recovery heat exchanger 1410a and a 1-2 recovery heat exchanger 1410b.
  • the 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) may have a structure in which they are alternately arranged in the vertical direction (intertwined coils).
  • the 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) which are arranged alternately in this way, secure a larger area through parallel connection, and the cooling/heating/dehumidifying capacity of the air conditioner can increase.
  • the first recovery heat exchanger 1410 is depicted as consisting of a 1-1 recovery heat exchanger 1410a and a 1-2 recovery heat exchanger 1410b.
  • the 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) may have a structure in which they are stacked in the vertical direction.
  • the 1-1 recovery heat exchanger (1410a) may be located relatively upward, and the 1-2 recovery heat exchanger (1410b) may be located below.
  • the 1-1st recovery heat exchanger (1410a) and the 1-2nd recovery heat exchanger (1410b) which are stacked together in this way, secure a larger area through parallel connection and increase the cooling/heating/dehumidification capacity of the air conditioner. can be increased.
  • the first recovery heat exchanger 1410 is depicted as consisting of a 1-1 recovery heat exchanger 1410a and a 1-2 recovery heat exchanger 1410b.
  • the 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) may have a structure arranged to the left and right of each other along the side surface.
  • the 1-1 recovery heat exchanger (1410a) may be placed relatively on the left, and the 1-2 recovery heat exchanger (1410b) may be placed on the right.
  • the 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) may be arranged left and right with respect to the front.

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Abstract

The present invention relates to an air conditioner. The present invention may comprise outdoor units (100, 200, 300) comprising a plurality of independent outdoor devices. The outdoor units (100, 200, 300) are connected to the plurality of outdoor devices, form an indoor duct for supplying external air or indoor air into an indoor space, and may have arranged therein a dehumidifying rotor (460) which dehumidifies the air in the indoor duct. A transfer unit is arranged between the outdoor units (100, 200, 300) and an indoor unit (400), and can transfer a main refrigerant between the outdoor units (100, 200, 300) and the indoor unit (400). Heat exchange units (700, 900) may be arranged between the transfer unit and the indoor unit (400). The heat exchange units (700, 900) may comprise a module compressor which compresses a regenerated refrigerant that flows independently of the main refrigerant, and a module heat exchanger in which each of the main refrigerant and the regenerated refrigerant circulates. Here, the module heat exchanger can carry out heat exchange between the main refrigerant and the regenerated refrigerant.

Description

공기조화기air conditioner

본 발명은 공기조화기에 관한 것이다. The present invention relates to air conditioners.

공기조화기는 공기의 온도, 습도, 청정도 및/또는 기류분포 등을 조절하기 위한 장치로서 실내기와 실외기 및 이들의 공조를 제어하는 컨트롤러를 포함하여 이루어질 수 있다. An air conditioner is a device for controlling the temperature, humidity, cleanliness, and/or airflow distribution of air, and may include an indoor unit and an outdoor unit, and a controller that controls their air conditioning.

최근에는 빌딩 또는 공장 내부의 습도를 일정하게 유지하기 위하여 제습기능을 갖는 공기조화기도 사용되고 있다. 습도를 일정 수준 이하로 낮게 유지하기 위해서는 여러 단계를 거쳐 제습기능을 수행하는 공기조화기가 사용될 수 있다. Recently, air conditioners with a dehumidifying function are being used to maintain constant humidity inside a building or factory. In order to keep the humidity below a certain level, an air conditioner that performs a dehumidifying function through several stages can be used.

예를 들어, 대한민국 등록특허 10-1528640(선행기술1)에는 냉매열교환기(또는 냉수열교환기)을 이용하여 1차로 냉각제습을 하고, 제습로터를 이용하여 2차로 제습한 후에 다시 냉매열교환기(또는 냉수열교환기)을 이용하여 3차로 냉각제습하는 기술이 공개되어 있다. For example, in Republic of Korea Patent No. 10-1528640 (Prior Art 1), first cooling and dehumidification is performed using a refrigerant heat exchanger (or cold water heat exchanger), and second dehumidification is performed using a dehumidifying rotor, and then again using a refrigerant heat exchanger (or cold water heat exchanger). A technology for tertiary cooling and dehumidification using a cold water heat exchanger (or cold water heat exchanger) has been disclosed.

그런데 위 선행기술1은 외기 온도에 따라 냉매의 응축온도가 달라져 냉각사이클의 운전효율이 낮아지는 문제가 있다. 즉, 선행기술1은 계절에 따라 달라지는 조건(예를 들어, 온도조건 또는 습도조건)에 능동적으로 대응할 수 없는 것이다. 또한, 선행기술1은 3차 냉각 시에 공기가 과냉각되면 이를 재열하기 위한 열원이 추가되어야 하고, 냉수열교환기의 동파방지를 위한 열원도 추가되어야 하는 단점이 있다. However, the prior art 1 above has a problem in that the condensation temperature of the refrigerant varies depending on the outside temperature, lowering the operating efficiency of the cooling cycle. In other words, prior art 1 cannot actively respond to conditions that vary depending on the season (for example, temperature conditions or humidity conditions). In addition, prior art 1 has the disadvantage that if the air is supercooled during the third cooling, a heat source must be added to reheat it, and a heat source must also be added to prevent freezing of the cold water heat exchanger.

그리고, 대한민국 등록특허 등록특허 10-1061944(선행기술2)에는 냉난방, 제습 및 가습기능을 모두 구현할 수 있고, 계절별로 다르게 운영되는 공기조화시스템이 공개되어 있다. In addition, Republic of Korea Patent Registration No. 10-1061944 (Prior Art 2) discloses an air conditioning system that can implement all cooling, heating, dehumidifying, and humidifying functions and operates differently depending on the season.

그런데, 위 선행기술2는 데시칸트 로터만을 이용하여 실내공기를 제습하므로, 실내공간의 습도를 일정수준 이하로 낮추는데 한계가 있고, 넓은 공간을 제습하는데는 적합하지 않다. 선행기술2도 외기 온도에 따라 냉매의 응축온도가 달라져 운전효율이 낮아지는 문제가 있다. However, since the prior art 2 above dehumidifies indoor air using only a desiccant rotor, it has limitations in lowering the humidity of the indoor space below a certain level and is not suitable for dehumidifying a large space. Prior art 2 also has the problem of lowering operating efficiency because the condensation temperature of the refrigerant varies depending on the outside temperature.

또한, 선행기술1,2에서 제습로터의 재생을 위해 재생히터를 가동시켜야 하는데, 재생히터의 가동을 위한 에너지로 인해 전체 시스템의 전력소비량을 늘어나는 문제가 있다. In addition, in prior art 1 and 2, a regenerative heater must be operated to regenerate the dehumidifying rotor, but there is a problem that the power consumption of the entire system increases due to the energy required to operate the regenerative heater.

특히, 고온재생형 제습로터는 높은 온도를 제공하여 재생할 필요가 있다. 그런데, 선행기술1,2의 기술은 열교환기를 통해 고온을 발생시키기 어렵기 때문에 재생히터로 고온환경을 만들어야 하고, 따라서 전력소비량이 늘어나고 에너지효율이 떨어지는 문제가 있다. In particular, high-temperature regenerative dehumidification rotors need to be regenerated by providing high temperatures. However, since it is difficult to generate high temperature through a heat exchanger in the technologies of prior art 1 and 2, a high temperature environment must be created using a regenerative heater, and thus there is a problem of increased power consumption and reduced energy efficiency.

본 발명은 상기한 바와 같은 종래기술의 문제점을 해결하기 위한 것으로, 본 발명의 목적은 3차 이상의 제습단계를 포함하여 제습성능을 높이고, 각 제습단계에서 발생되는 폐열을 재활용하는 것이다. The present invention is intended to solve the problems of the prior art as described above. The purpose of the present invention is to increase dehumidification performance by including three or more dehumidification steps and to recycle the waste heat generated in each dehumidification step.

본 발명의 다른 목적은 공기조화기의 운전조건을 달리하여 계절에 따라 달라지는 환경조건에 능동적으로 대응할 수 있게 하는 것이다. Another purpose of the present invention is to enable the air conditioner to actively respond to environmental conditions that vary depending on the season by varying the operating conditions of the air conditioner.

본 발명의 또 다른 목적은 실내기에 배치된 재생열교환기를 이용하여 제습로터를 재생함으로써 재생히터의 사용을 줄이는 것이다. Another object of the present invention is to reduce the use of regenerative heaters by regenerating the dehumidification rotor using a regenerative heat exchanger disposed in the indoor unit.

본 발명의 또 다른 목적은 메인냉매와 독립적으로 운전되는 재생냉매를 이용하여 제습로터를 고온환경에서 재생시키는 것이다. Another object of the present invention is to regenerate a dehumidifying rotor in a high temperature environment using a regenerative refrigerant that operates independently of the main refrigerant.

본 발명의 또 다른 목적은 메인냉매를 이용하는 공조유닛과는 독립된 재생냉매를 이용하는 열교환유닛을 추가하고, 열교환유닛이 메인냉매와 재생냉매를 열교환시켜 폐열을 활용할 수 있게 하는 것이다. Another object of the present invention is to add a heat exchange unit using regenerated refrigerant that is independent of the air conditioning unit using the main refrigerant, and to enable the heat exchange unit to utilize waste heat by exchanging heat between the main refrigerant and the regenerated refrigerant.

본 발명의 또 다른 목적은 복수의 실내열교환기들에 각각 연결된 저압관의 경로를 다르게 설정하여 각 경로를 지나는 냉매의 냉매압손을 다르게 하는 것이다. Another object of the present invention is to vary the refrigerant pressure loss of the refrigerant passing through each path by setting different paths of low-pressure pipes connected to a plurality of indoor heat exchangers.

본 발명이 또 다른 목적은 실내기와 실외기의 사이에 배치된 냉매열교환기를 통해서 저압관의 냉매와 액관의 냉매 사이의 열교환이 이루어지도록 하는 것이다. Another object of the present invention is to enable heat exchange between the refrigerant in the low-pressure pipe and the refrigerant in the liquid pipe through a refrigerant heat exchanger disposed between the indoor unit and the outdoor unit.

상기한 바와 같은 목적을 달성하기 위한 본 발명의 특징에 따르면, 본 발명은 서로 독립된 복수의 실외기들을 포함하는 실외유닛과, 실외유닛을 포함할 수 있다. 상기 실외유닛은 상기 복수의 실외기들과 연결되고, 외부공기 또는 실내공기를 실내공간으로 공급하는 실내덕트를 형성하며, 내부에는 상기 실내덕트 내부의 공기를 제습하는 제습로터가 배치될 수 있다. 상기 실외유닛과 상기 실내유닛의 사이에는 전달유닛이 배치되어, 상기 실외유닛과 상기 실내유닛 사이로 메인냉매를 전달할 수 있다. 이처럼 본 발명에서는 제습로터에 의한 제습과 동시에, 복수의 공조유닛이 냉방사이클을 이용하여 공기를 여러 단계로 제습해줄 수 있다. 따라서, 공기조화기의 제습성능이 향상될 수 있다. According to the characteristics of the present invention for achieving the above-mentioned object, the present invention may include an outdoor unit including a plurality of outdoor units that are independent from each other, and the outdoor unit. The outdoor unit is connected to the plurality of outdoor units and forms an indoor duct that supplies outside air or indoor air to the indoor space, and a dehumidification rotor that dehumidifies the air inside the indoor duct may be disposed inside. A transfer unit is disposed between the outdoor unit and the indoor unit to transfer the main refrigerant between the outdoor unit and the indoor unit. As such, in the present invention, simultaneously with dehumidification by the dehumidification rotor, a plurality of air conditioning units can dehumidify the air in several stages using a cooling cycle. Therefore, the dehumidification performance of the air conditioner can be improved.

상기 전달유닛과 상기 실내유닛의 사이에는 열교환유닛이 배치될 수 있다. 상기 열교환유닛은 상기 메인냉매와 독립적으로 유동하는 재생냉매를 압축하는 모듈압축기와, 상기 메인냉매와 상기 재생냉매가 각각 순환되는 모듈열교환기를 포함할 수 있다. 이때, 상기 모듈열교환기는 상기 메인냉매를 응축시킬 수 있고, 상기 재생냉매를 증발시킬 수 있다. 이 과정에서, 상기 모듈열교환기는 상기 메인냉매와 상기 재생냉매를 서로 열교환시킬 수 있다. 상기 모듈열교환기는 재생냉매와 메인냉매를 서로 열교환시켜줌으로써 재생열교환기의 방열에너지를 더욱 높여줄 수 있다. A heat exchange unit may be disposed between the transfer unit and the indoor unit. The heat exchange unit may include a module compressor that compresses regenerated refrigerant that flows independently of the main refrigerant, and a module heat exchanger in which the main refrigerant and the regenerated refrigerant are circulated, respectively. At this time, the module heat exchanger can condense the main refrigerant and evaporate the regenerated refrigerant. In this process, the module heat exchanger can exchange heat between the main refrigerant and the regenerated refrigerant. The module heat exchanger can further increase the heat dissipation energy of the regenerative heat exchanger by exchanging heat between the regenerative refrigerant and the main refrigerant.

그리고, 상기 실내유닛에는 상기 열교환유닛과 함께 재생냉매사이클을 구성하는 제1재생열교환기가 배치될 수 있다. 상기 제1재생열교환기는 상기 모듈압축기에서 압축된 상기 재생냉매를 응축시킬 수 있다. 상기 제1재생열교환기는 상기 재생냉매를 응축하면서 상기 제습로터로 유동되는 공기에 방열할 수 있다. 상기 제1재생열교환기는 상기 제습로터를 재생할 수 있으므로, 재생히터의 사용량을 줄여 에너지효율을 높일 수 있다. Additionally, a first regenerative heat exchanger that forms a regenerative refrigerant cycle together with the heat exchange unit may be disposed in the indoor unit. The first regenerative heat exchanger may condense the regenerative refrigerant compressed in the module compressor. The first regenerative heat exchanger may condense the regenerated refrigerant and radiate heat to the air flowing into the dehumidifying rotor. Since the first regenerative heat exchanger can regenerate the dehumidification rotor, energy efficiency can be increased by reducing the amount of regenerative heater usage.

또한, 상기 실내유닛에는 상기 실내덕트 내부의 공기를 상기 메인냉매와 열교환시키는 복수의 실내열교환기들이 포함될 수 있다. 상기 실내유닛에는 상기 실내덕트 내부의 공기가 외부로 배출되는 제1배기구에 제1회수열교환기가 배치될 수 있다. 상기 제1회수열교환기는 상기 복수의 실외기들 중 어느 하나 및 상기 실내열교환기들과 함께 메인냉매사이클을 구성할 수 있다. 이때, 상기 제1회수열교환기는 상기 제1배기구를 통해 외부로 배출되는 배기와 상기 메인냉매 사이를 서로 열교환시킬 수 있다. 따라서, 복수의 실내열교환기와 상기 제습로터를 이용하여 여러 단계의 제습이 가능하고, 상기 제1회수열교환기를 통해 폐열을 재활용함으로써 에너지효율을 높일 수도 있다. Additionally, the indoor unit may include a plurality of indoor heat exchangers that exchange heat with the air inside the indoor duct and the main refrigerant. In the indoor unit, a first recovery heat exchanger may be disposed at a first exhaust port through which air inside the indoor duct is discharged to the outside. The first recovery heat exchanger may form a main refrigerant cycle together with one of the plurality of outdoor units and the indoor heat exchangers. At this time, the first recovery heat exchanger can exchange heat between the main refrigerant and the exhaust discharged to the outside through the first exhaust port. Accordingly, dehumidification in several stages is possible using a plurality of indoor heat exchangers and the dehumidification rotor, and energy efficiency can be increased by recycling waste heat through the first recovery heat exchanger.

그리고, 상기 모듈열교환기는 판형 열교환기로 구성될 수 있다. 판형 열교환기를 통해, 메인냉매와 재생냉매 사이의 냉매 대 냉매 열교환이 가능해질 수 있다. Additionally, the module heat exchanger may be configured as a plate-type heat exchanger. Through a plate heat exchanger, refrigerant-to-refrigerant heat exchange between the main refrigerant and the regenerated refrigerant may be possible.

또한, 상기 실외유닛은 서로 독립된 제1실외기, 제2실외기 및 제3실외기를 포함할 수 있다. 상기 메인냉매는 상기 제1실외기에서 압축되는 제1메인냉매, 상기 제2실외기에서 압축되는 제2메인냉매 및 상기 제3실외기에서 압축되는 제3메인냉매를 포함할 수 있다. 상기 제3메인냉매는 추가적인 제습/냉각기능을 구현할 수 있다. Additionally, the outdoor unit may include a first outdoor unit, a second outdoor unit, and a third outdoor unit that are independent from each other. The main refrigerant may include a first main refrigerant compressed in the first outdoor unit, a second main refrigerant compressed in the second outdoor unit, and a third main refrigerant compressed in the third outdoor unit. The third main refrigerant can implement additional dehumidification/cooling functions.

그리고, 상기 실내유닛은 상기 제1실외기와 함께 제1메인냉매사이클을 구성하는 제1실내열교환기, 제2실내열교환기 및 제1회수열교환기를 포함할 수 있다. 상기 실내유닛은 상기 제2실외기와 함께 제2메인냉매사이클을 구성하는 제2회수열교환기를 포함할 수 있고, 상기 제3실외기와 함께 제3메인냉매사이클을 구성하는 제3실내열교환기 및 제4실내열교환기를 포함할 수 있다. 상기 제2회수열교환기는 증발기로 구동하므로, 냉매가 상기 실내유닛 내부의 공기로부터 효과적으로 흡열할 수 있다. Additionally, the indoor unit may include a first indoor heat exchanger, a second indoor heat exchanger, and a first recovery heat exchanger that together with the first outdoor unit constitute a first main refrigerant cycle. The indoor unit may include a second recovery heat exchanger that forms a second main refrigerant cycle together with the second outdoor unit, and a third indoor heat exchanger and a fourth heat exchanger that form a third main refrigerant cycle together with the third outdoor unit. It may include an indoor heat exchanger. Since the second recovery heat exchanger is driven by an evaporator, the refrigerant can effectively absorb heat from the air inside the indoor unit.

그리고, 상기 전달유닛은 상기 제1실외기와 상기 실내유닛 사이에 배치되고, 상기 제1실외기와 상기 실내유닛 사이로 제1메인냉매를 전달하는 제1전달모듈을 포함할 수 있다. 상기 전달유닛은 상기 제2실외기와 상기 실내유닛 사이에 배치되고, 상기 제2실외기와 상기 실내유닛 사이로 제2메인냉매를 전달하는 제2전달모듈을 포함할 수 있다. 상기 전달유닛은 상기 제3실외기와 상기 실내유닛 사이에 배치되고, 상기 제3실외기와 상기 실내유닛 사이로 제3메인냉매를 전달하는 제3전달모듈을 포함할 수 있다. 이러한 연결구조는 복수의 열교환기들이 응축기로 구동되거나, 증발기로 구동되게 할 수 있다. Additionally, the transfer unit may be disposed between the first outdoor unit and the indoor unit and may include a first transfer module that transfers the first main refrigerant between the first outdoor unit and the indoor unit. The transfer unit may be disposed between the second outdoor unit and the indoor unit and may include a second transfer module that transfers a second main refrigerant between the second outdoor unit and the indoor unit. The transfer unit may be disposed between the third outdoor unit and the indoor unit and may include a third transfer module that transfers a third main refrigerant between the third outdoor unit and the indoor unit. This connection structure can allow a plurality of heat exchangers to be driven as a condenser or as an evaporator.

또한, 상기 열교환유닛은 상기 제2전달모듈과 상기 실내유닛 사이에 배치되고, 제1재생냉매를 작동시키는 제1열교환모듈을 포함할 수 있다. 상기 열교환유닛에는 상기 제3전달모듈과 상기 실내유닛 사이에 배치되고, 제2재생냉매를 작동시키는 제2열교환모듈이 더 포함될 수 있다. 이러한 제1,2열교환모듈은 독립된 재생냉매를 운용함으로써, 공조유닛은 고압 싸이클과 저압 싸이클을 병렬로 연결한 일종의 캐스캐이드 싸이클(Cascade cycle)이 될 수 있다. Additionally, the heat exchange unit may include a first heat exchange module that is disposed between the second transfer module and the indoor unit and operates a first regenerated refrigerant. The heat exchange unit may further include a second heat exchange module that is disposed between the third transfer module and the indoor unit and operates a second regenerated refrigerant. By operating independent regenerative refrigerants in these first and second heat exchange modules, the air conditioning unit can become a type of cascade cycle in which a high-pressure cycle and a low-pressure cycle are connected in parallel.

그리고, 상기 제1열교환모듈은 제1재생냉매를 압축하는 제1모듈압축기를 포함할 수 있다. 상기 제1열교환모듈에는 상기 제1재생열교환기와 연결되고, 응축된 제1재생냉매를 팽창시키는 제1모듈팽창변이 더 포함될 수 있다. 상기 제1열교환모듈에는 상기 제1재생냉매를 증발시키고, 상기 제1메인냉매를 응축시키는 제1모듈열교환기가 포함될 수 있다. Additionally, the first heat exchange module may include a first module compressor that compresses the first regenerated refrigerant. The first heat exchange module may further include a first module expansion valve that is connected to the first regenerative heat exchanger and expands the condensed first regenerative refrigerant. The first heat exchange module may include a first module heat exchanger that evaporates the first regenerated refrigerant and condenses the first main refrigerant.

또한, 상기 제2열교환모듈은 상기 제2재생냉매를 압축하는 제2모듈압축기를 포함할 수 있다. 상기 제2열교환모듈은 상기 제2재생열교환기와 연결되고, 응축된 제2재생냉매를 팽창시키는 2모듈팽창변을 포함할 수 있다. 상기 제2열교환모듈은 상기 제2재생냉매를 증발시키고, 상기 제2메인냉매를 응축시키는 제2모듈열교환기를 포함할 수 있다. Additionally, the second heat exchange module may include a second module compressor that compresses the second regenerative refrigerant. The second heat exchange module is connected to the second regenerative heat exchanger and may include a two-module expansion valve that expands the condensed second regenerative refrigerant. The second heat exchange module may include a second module heat exchanger that evaporates the second regenerated refrigerant and condenses the second main refrigerant.

그리고, 상기 복수의 실내열교환기들에는 상기 제1전달모듈과 연결되는 제1실내열교환기 및 제2실내열교환기와, 상기 제3전달모듈과 연결되는 제3실내열교환기 및 제4실내열교환기가 포함될 수 있다. 이때, 상기 제1실내열교환기와 상기 제2실내열교환기는 상기 실내덕트의 경로를 따라 연속적으로 배치될 수 있다. 이처럼 배치된 상기 제1실내열교환기는 공기의 실내온도에 변화를 주는 현열부하(Sensible Heat Load)를 제거할 수 있고, 상기 제2실내열교환기는 실내습도에 변화를 주는 잠열부하(Latent Heat Load)를 제거할 수 있다. In addition, the plurality of indoor heat exchangers may include a first indoor heat exchanger and a second indoor heat exchanger connected to the first transfer module, and a third indoor heat exchanger and a fourth indoor heat exchanger connected to the third transfer module. there is. At this time, the first indoor heat exchanger and the second indoor heat exchanger may be continuously arranged along the path of the indoor duct. The first indoor heat exchanger arranged in this way can remove the sensible heat load that changes the indoor temperature of the air, and the second indoor heat exchanger can remove the latent heat load that changes the indoor humidity. It can be removed.

또한, 상기 제3실내열교환기와 상기 제4실내열교환기는 상기 실내덕트의 경로를 따라 연속적으로 배치될 수 있고, 상기 제3실내열교환기는 상기 제습로터를 사이에 두고 상기 제2실내열교환기의 반대편에 배치될 수 있다. In addition, the third indoor heat exchanger and the fourth indoor heat exchanger may be continuously arranged along the path of the indoor duct, and the third indoor heat exchanger is located on the opposite side of the second indoor heat exchanger with the dehumidification rotor interposed therebetween. can be placed.

그리고, 상기 제1회수열교환기는 상기 제1전달모듈, 제1실내열교환기 및 제2실내열교환기와 각각 냉매배관으로 연결될 수 있다. In addition, the first recovery heat exchanger may be connected to the first transfer module, the first indoor heat exchanger, and the second indoor heat exchanger through refrigerant pipes, respectively.

또한, 상기 제1전달모듈은 상기 제1실외기와 상기 실내유닛 사이의 냉매흐름을 제어하는 제1냉매분배밸브와, 제1냉매열교환기를 포함할 수 있다. 이때 상기 제1냉매열교환기는 상기 제1실내열교환기와 상기 제1실외압축기 사이를 연결하는 제1저압관을 유동하는 제1메인냉매와, 상기 제2실내열교환기와 상기 제1실외열교환기 사이를 연결하는 제1액관을 유동하는 제1메인냉매 사이를 열교환시킬 수 있다. Additionally, the first transfer module may include a first refrigerant distribution valve that controls the flow of refrigerant between the first outdoor unit and the indoor unit, and a first refrigerant heat exchanger. At this time, the first refrigerant heat exchanger connects the first main refrigerant flowing through the first low-pressure pipe connected between the first indoor heat exchanger and the first outdoor compressor, and the second indoor heat exchanger and the first outdoor heat exchanger. Heat can be exchanged between the first main refrigerant flowing through the first liquid pipe.

그리고, 상기 제1전달모듈은 상기 제1실외압축기에 의해 압축된 제1메인냉매를 상기 복수의 실내열교환기들 중 일부 또는 상기 제1회수열교환기 중 적어도 어느 하나로 전달할 수 있다. Additionally, the first delivery module may transfer the first main refrigerant compressed by the first outdoor compressor to at least one of some of the plurality of indoor heat exchangers or the first recovery heat exchanger.

또한, 상기 제1실내열교환기는 상기 제1냉매열교환기와 직접 연결되고, 상기 제2실내열교환기는 상기 제1냉매분배밸브를 거쳐 상기 제1냉매열교환기와 연결될 수 있다. Additionally, the first indoor heat exchanger may be directly connected to the first refrigerant heat exchanger, and the second indoor heat exchanger may be connected to the first refrigerant heat exchanger through the first refrigerant distribution valve.

그리고, 상기 제2전달모듈은 상기 제2실외압축기에 의해 압축된 제2메인냉매를 상기 열교환유닛으로 전달할 수 있다. Additionally, the second delivery module may transfer the second main refrigerant compressed by the second outdoor compressor to the heat exchange unit.

또한, 상기 제습로터와 상기 제1재생열교환기의 사이에는 상기 제습로터를 재생시키는 재생히터가 배치될 수 있다. Additionally, a regenerative heater that regenerates the dehumidifying rotor may be disposed between the dehumidifying rotor and the first regenerative heat exchanger.

그리고, 상기 실내유닛에는 상기 실내덕트 내부의 공기를 외부로 배출하고, 상기 제1회수열교환기가 배치되는 상기 제1배기구가 포함될 수 있다. 이에 더하여 상기 실내유닛에는 상기 제1배기구와 독립되게 구비되고, 상기 실내덕트 내부의 공기를 외부로 배출하며, 외부로 배출되는 배기와 제2메인냉매를 열교환시키는 제2회수열교환기가 배치되는 제2배기구가 더 포함될 수 있다. Additionally, the indoor unit may include the first exhaust port that exhausts air inside the indoor duct to the outside and where the first recovery heat exchanger is disposed. In addition, the indoor unit is provided with a second recovery heat exchanger that is independent of the first exhaust port, discharges air inside the indoor duct to the outside, and exchanges heat between the exhaust exhaust discharged to the outside and the second main refrigerant. Additional exhaust ports may be included.

또한, 상기 제습로터는 상기 제1재생열교환기와 상기 제2회수열교환기의 사이에 배치될 수 있다. Additionally, the dehumidification rotor may be disposed between the first regenerative heat exchanger and the second recovery heat exchanger.

그리고, 상기 제2전달모듈은 상기 제2실외기와 상기 제1열교환모듈 사이에서 제2메인냉매의 흐름을 제어하는 제2냉매분배밸브와, 제2냉매열교환기를 포함할 수 있다. 이때 상기 제2냉매열교환기는 상기 제2회수열교환기와 상기 제2실외압축기 사이를 연결하는 제2저압관을 유동하는 제2메인냉매와, 상기 제2실외열교환기와 상기 열교환유닛 사이를 연결하는 제2액관을 유동하는 제2메인냉매 사이를 열교환시킬 수 있다. Additionally, the second transfer module may include a second refrigerant distribution valve that controls the flow of the second main refrigerant between the second outdoor unit and the first heat exchange module, and a second refrigerant heat exchanger. At this time, the second refrigerant heat exchanger includes a second main refrigerant flowing through a second low-pressure pipe connected between the second recovery heat exchanger and the second outdoor compressor, and a second main refrigerant connected between the second outdoor heat exchanger and the heat exchange unit. Heat can be exchanged between the second main refrigerant flowing through the liquid pipe.

또한, 상기 제3실내열교환기는 상기 제습로터를 사이에 두고 상기 제1실내열교환기 및 제2실내열교환기의 반대편에 배치될 수 있다. Additionally, the third indoor heat exchanger may be disposed on the opposite side of the first indoor heat exchanger and the second indoor heat exchanger with the dehumidification rotor interposed therebetween.

그리고, 상기 제1실외기와 상기 제1전달모듈은 냉매배관을 통해 연결될 수 있다. 이때, 상기 냉매배관은 상기 제1실외압축기의 흡입부와 상기 제1전달모듈 사이를 연결하는 제1저압관, 상기 제1실외압축기의 토출부와 상기 제1전달모듈 사이를 연결하는 제1고압관 및 상기 제1실외열교환기와 상기 제1전달모듈 사이를 연결하는 제1액관을 포함할 수 있다. Additionally, the first outdoor unit and the first transmission module may be connected through a refrigerant pipe. At this time, the refrigerant pipe is a first low pressure pipe connecting between the suction part of the first outdoor compressor and the first delivery module, and a first high pressure pipe connecting between the discharge part of the first outdoor compressor and the first delivery module. It may include a pipe and a first liquid pipe connecting the first outdoor heat exchanger and the first transfer module.

또한, 상기 제1실외기에는 상기 제1실외압축기의 토출부, 제1어큐뮬레이터의 회수부 및 상기 제1실외열교환기에 각각 연결되는 제1메인실외밸브가 포함될 수 있다. 상기 제1실외기에는 상기 제1메인실외밸브와 연결되고, 상기 제1전달모듈 및 상기 제1어큐뮬레이터의 회수부에 각각 연결되는 제1서브실외밸브가 더 포함될 수 있다. Additionally, the first outdoor unit may include a first main outdoor valve respectively connected to the discharge part of the first outdoor compressor, the recovery part of the first accumulator, and the first outdoor heat exchanger. The first outdoor unit may further include a first sub-outdoor valve connected to the first main outdoor valve and connected to the first delivery module and a recovery unit of the first accumulator, respectively.

그리고, 상기 제1실외기, 상기 제1전달모듈, 상기 제1실내열교환기, 제2실내열교환기 및 상기 제1회수열교환기는 제1공조유닛을 구성할 수 있다. 상기 제2실외기, 상기 제2전달모듈, 상기 제1열교환모듈, 상기 제1재생열교환기 및 상기 제2회수열교환기는 제2공조유닛을 구성할 수 있다. 상기 제3실외기, 상기 제3전달모듈, 상기 제3실내열교환기, 제4실내열교환기, 제2열교환모듈 및 상기 제2재생열교환기는 제3공조유닛을 구성할 수 있다. Additionally, the first outdoor unit, the first transfer module, the first indoor heat exchanger, the second indoor heat exchanger, and the first recovery heat exchanger may constitute a first air conditioning unit. The second outdoor unit, the second transfer module, the first heat exchange module, the first regenerative heat exchanger, and the second recovery heat exchanger may constitute a second air conditioning unit. The third outdoor unit, the third transfer module, the third indoor heat exchanger, the fourth indoor heat exchanger, the second heat exchange module, and the second regenerative heat exchanger may constitute a third air conditioning unit.

또한, 상기 제1공조유닛에 포함된 상기 제1실내열교환기, 제2실내열교환기 및 상기 제1회수열교환기는 각각 서로 병렬연결된 복수개의 열교환기들로 구성될 수 있다. Additionally, the first indoor heat exchanger, the second indoor heat exchanger, and the first recovery heat exchanger included in the first air conditioning unit may each be composed of a plurality of heat exchangers connected in parallel.

그리고, 상기 실외유닛, 상기 실내유닛, 상기 전달유닛 및 상기 열교환유닛은 외기온도 또는 외기습도 조건에 따라 구분되는 제1공조모드, 제2공조모드 또는 제3공조모드로 동작되고, 상기 제1공조모드, 제2공조모드 또는 제3공조모드는 메인제어부에 의해 제어될 수 있다. In addition, the outdoor unit, the indoor unit, the transfer unit, and the heat exchange unit are operated in a first air conditioning mode, a second air conditioning mode, or a third air conditioning mode depending on the outdoor temperature or outdoor humidity conditions, and the first air conditioning mode mode, the second air conditioning mode, or the third air conditioning mode can be controlled by the main control unit.

위에서 살핀 바와 같은 본 발명에 의한 공기조화기에는 다음과 같은 효과가 있다. The air conditioner according to the present invention as seen above has the following effects.

본 발명의 공기조화기는 제1공조유닛 내지 제3공조유닛을 포함할 수 있다. 제1공조유닛은 공기를 냉각/가열/제습할 수 있고, 제2공조유닛은 공기를 제습함과 동시에 제습로터를 재생할 수 있다. 제3공조유닛은 공기를 추가로 냉각/가열/제습함과 동시에, 제습로터를 재생할 수 있다. 이처럼 본 발명에서는 제습로터에 의한 제습과 동시에, 복수의 공조유닛이 냉방사이클을 이용하여 공기를 여러 단계로 제습해줄 수 있다. 따라서, 공기조화기의 제습성능이 향상되는 효과가 있다. The air conditioner of the present invention may include a first air conditioning unit to a third air conditioning unit. The first air conditioning unit can cool/heat/dehumidify the air, and the second air conditioning unit can dehumidify the air and regenerate the dehumidification rotor at the same time. The third air conditioning unit can additionally cool/heat/dehumidify the air and regenerate the dehumidification rotor. As such, in the present invention, simultaneously with dehumidification by the dehumidification rotor, a plurality of air conditioning units can dehumidify the air in several stages using a cooling cycle. Therefore, there is an effect of improving the dehumidification performance of the air conditioner.

그리고, 본 발명에서 실내기에는 복수의 실내열교환기들이 직렬로 배치될 수 있다. 실내기를 통과하는 공기가 이들 실내열교환기들과 제습로터를 순서대로 지나면 5단계 이상의 제습이 이루어질 수 있다. 따라서 본 발명의 공기조화기는 초저제습 기능을 구현할 수 있다. Also, in the present invention, a plurality of indoor heat exchangers may be arranged in series in the indoor unit. If the air passing through the indoor unit passes through these indoor heat exchangers and the dehumidification rotor in that order, dehumidification in five or more stages can be achieved. Therefore, the air conditioner of the present invention can implement an ultra-low dehumidification function.

또한, 본 발명의 공기조화기의 실내기에는 회수열교환기가 배치되어, 회수열교환기의 냉매는 외부로 배출되는 배기로 방열하거나 배기로부터 흡열할 수 있다. 이처럼 배기의 폐열을 이용하여 냉동사이클의 효율을 높일 수 있고, 결과적으로 공기조화기의 소비전력을 줄여 에너지효율을 높일 수 있다. In addition, a recovery heat exchanger is disposed in the indoor unit of the air conditioner of the present invention, and the refrigerant in the recovery heat exchanger can radiate heat to the exhaust discharged to the outside or absorb heat from the exhaust. In this way, the efficiency of the refrigeration cycle can be increased by using the waste heat of the exhaust, and as a result, the power consumption of the air conditioner can be reduced to increase energy efficiency.

특히, 본 발명의 각 공조유닛은 독립된 히트펌프를 구성할 수 있고, 회수열교환기는 응축기 또는 증발기로 동작될 수 있다. 회수열교환기가 응축기로 동작되면 냉매가 배기로 방열할 수 있고, 증발기로 동작되면 냉매가 배기에서 흡열할 수 있다. 이러한 냉매의 방열과 흡열은 외부의 공기 보다 조건이 좋은 실내공기(환기)를 이용하는 것이므로, 공기조화기는 다양한 계절과 환경 조건에 능동적으로 대응할 수 있다. In particular, each air conditioning unit of the present invention can be configured as an independent heat pump, and the recovery heat exchanger can be operated as a condenser or evaporator. When the recovery heat exchanger operates as a condenser, the refrigerant can dissipate heat into the exhaust, and when it operates as an evaporator, the refrigerant can absorb heat from the exhaust. Since the heat dissipation and heat absorption of this refrigerant uses indoor air (ventilation), which has better conditions than outdoor air, the air conditioner can actively respond to various seasons and environmental conditions.

그리고, 본 발명의 실내기에 배치된 재생열교환기는 응축기로 구동됨과 동시에, 냉매의 방열을 통해 제습로터를 재생할 수 있다. 따라서, 제습로터의 재생효율이 높아질 수 있고, 제습로터를 재생하기 위한 재생히터의 가동을 줄일 수 있다. 이를 통해 공기조화기의 에너지효율을 높일 수 있다. In addition, the regenerative heat exchanger disposed in the indoor unit of the present invention can be driven by a condenser and simultaneously regenerate the dehumidification rotor through heat dissipation of the refrigerant. Accordingly, the regeneration efficiency of the dehumidification rotor can be increased, and the operation of the regeneration heater for regenerating the dehumidification rotor can be reduced. Through this, the energy efficiency of the air conditioner can be increased.

특히, 본 발명의 열교환유닛은 공조유닛 안에서 다른 종류의 냉매(재생냉매)를 이용하여 독립된 재생냉매사이클을 구성할 수 있다. 재생냉매사이클을 구성하는 재생열교환기는 재생냉매의 응축과정에서 방열하여, 제습로터를 고온환경에서 재생시킬 수 있다. 따라서, 실내기에 고온재생형 제습로터를 적용할 수 있고, 초저습의 실내환경을 구축할 수 있다. In particular, the heat exchange unit of the present invention can form an independent regenerative refrigerant cycle using a different type of refrigerant (regenerated refrigerant) within the air conditioning unit. The regenerative heat exchanger that constitutes the regenerative refrigerant cycle radiates heat during the condensation process of the regenerated refrigerant, allowing the dehumidifying rotor to be regenerated in a high temperature environment. Therefore, a high-temperature regenerative dehumidification rotor can be applied to the indoor unit, and an indoor environment of ultra-low humidity can be established.

그리고, 열교환유닛은 독립된 재생냉매를 순환시켜, 캐스케이드 사이클을 구성할 수 있다. 열교환유닛에 포함된 모듈열교환기는 재생냉매와 메인냉매를 서로 열교환시켜줌으로써 재생열교환기의 방열에너지를 더욱 높여줄 수 있다. 이를 통해 제습로터의 재생효율이 더욱 높아질 수 있다. Additionally, the heat exchange unit can circulate an independent regenerative refrigerant to form a cascade cycle. The module heat exchanger included in the heat exchange unit can further increase the heat dissipation energy of the regenerative heat exchanger by exchanging heat between the regenerative refrigerant and the main refrigerant. Through this, the regeneration efficiency of the dehumidification rotor can be further increased.

또한, 본 발명의 제2공조유닛을 구성하는 제2회수열교환기는 증발기로 구동될 수 있는데, 제2회수열교환기는 고온의 제습로터의 출구 쪽에 배치될 수 있다. 따라서, 제2회수열교환기의 냉매는 제습로터를 통과한 후 외부로 버려지는 고온의 공기로부터 흡열하여 효과적으로 증발될 수 있고, 폐열을 재활용할 수 있으므로 에너지효율을 높일 수 있다. Additionally, the second recovery heat exchanger constituting the second air conditioning unit of the present invention may be driven by an evaporator, and the second recovery heat exchanger may be placed on the outlet side of the high temperature dehumidification rotor. Therefore, the refrigerant in the second recovery heat exchanger can be effectively evaporated by absorbing heat from the high-temperature air that is thrown to the outside after passing through the dehumidification rotor, and the waste heat can be recycled, thereby improving energy efficiency.

특히, 제습로터를 통과한 공기는 매우 고온의 상태이므로, 제2회수열교환기의 증발효율은 매우 높아질 수 있다. 이때 사용한 흡열에너지는 다른 열교환기(재생열교환기)를 구동시키는데 활용할 수 있다. 따라서, 제2공조유닛의 에너지효율이 더욱 향상될 수 있다. In particular, since the air passing through the dehumidification rotor is at a very high temperature, the evaporation efficiency of the second recovery heat exchanger can be greatly increased. The endothermic energy used at this time can be used to drive another heat exchanger (regenerative heat exchanger). Accordingly, the energy efficiency of the second air conditioning unit can be further improved.

또한, 본 발명의 실내기에 구비된 복수의 실내열교환기들에서 배출된 냉매는 제1전달모듈을 통해 제1실외기에 전달될 수 있다. 이때, 복수의 실내열교환기들에 각각 연결된 저압관은 서로 이동경로가 달라, 실내열교환기들에서 배출된 냉매의 냉매압손이 다를 수 있다. 제어부는 냉매압손 차이에 따른 온도차를 이용하여 공기조화기의 냉각/제습 기능을 보다 세밀하게 제어할 수 있는 효과가 있다. Additionally, the refrigerant discharged from the plurality of indoor heat exchangers provided in the indoor unit of the present invention may be delivered to the first outdoor unit through the first transfer module. At this time, the low-pressure pipes connected to each of the plurality of indoor heat exchangers have different movement paths, so the refrigerant pressure loss of the refrigerant discharged from the indoor heat exchangers may be different. The control unit has the effect of controlling the cooling/dehumidification function of the air conditioner more precisely by using the temperature difference due to the difference in refrigerant pressure loss.

그리고, 본 발명의 실내기와 실외기 사이에 배치된 제1전달모듈/제2전달모듈/제3전달모듈에는 각각 냉매열교환기가 구비될 수 있다. 냉매열교환기를 통과하는 저압관의 냉매와 액관의 냉매는 서로 열교환될 수 있다. 따라서, 액관을 통과하는 냉매가 (i) 액상상태인 경우에는 추가적으로 과냉각되어 안정화될 수 있고, (ii) 이상(2-phase) 상태인 경우 액상화될 수 있다. 이러한 냉매의 냉각을 통해 공기조화기의 동작신뢰성을 높일 수 있다. In addition, the first transfer module, second transfer module, and third transfer module disposed between the indoor unit and the outdoor unit of the present invention may each be provided with a refrigerant heat exchanger. The refrigerant in the low-pressure pipe and the refrigerant in the liquid pipe passing through the refrigerant heat exchanger can exchange heat with each other. Therefore, if the refrigerant passing through the liquid pipe is (i) in a liquid state, it can be additionally supercooled and stabilized, and (ii) if it is in a two-phase state, it can be liquefied. The operational reliability of the air conditioner can be improved through cooling of this refrigerant.

도 1은 본 발명의 공기조화기의 일실시례의 개략적인 구성을 보인 구조도. 1 is a structural diagram showing the schematic configuration of an example of an air conditioner of the present invention.

도 2는 본 발명의 일실시례에 따른 제어부와 제어부에 의해 제어되는 구조들의 구성을 보인 블럭도.Figure 2 is a block diagram showing the configuration of a control unit and structures controlled by the control unit according to an embodiment of the present invention.

도 3은 본 발명의 일실시례를 구성하는 제어부에 의해 공기조화기가 각 모드별로 제어되는 과정을 순차적으로 보인 순서도. Figure 3 is a flow chart sequentially showing the process in which the air conditioner is controlled for each mode by the control unit constituting an embodiment of the present invention.

도 4는 제1공조모드일 때 본 발명의 일실시례의 냉매유동을 보인 구조도. Figure 4 is a structural diagram showing the refrigerant flow in one embodiment of the present invention in the first air conditioning mode.

도 5는 제1공조모드일 때 본 발명의 일실시례를 구성하는 제1공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 5 is a flow chart showing the refrigerant flow and air flow of the first air conditioning unit constituting an embodiment of the present invention in the first air conditioning mode.

도 6은 제1공조모드일 때 본 발명의 일실시례를 구성하는 제2공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 6 is a flow chart showing the refrigerant flow and air flow of the second air conditioning unit constituting an embodiment of the present invention in the first air conditioning mode.

도 7은 제1공조모드일 때 본 발명의 일실시례를 구성하는 제3공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 7 is a flow chart showing the refrigerant flow and air flow of the third air conditioning unit constituting an embodiment of the present invention in the first air conditioning mode.

도 8는 제2공조모드일 때 본 발명의 일실시례의 냉매유동을 보인 구조도. Figure 8 is a structural diagram showing the refrigerant flow in one embodiment of the present invention in the second air conditioning mode.

도 9는 제2공조모드일 때 본 발명의 일실시례를 구성하는 제1공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 9 is a flow chart showing the refrigerant flow and air flow of the first air conditioning unit constituting an embodiment of the present invention in the second air conditioning mode.

도 10은 제2공조모드일 때 본 발명의 일실시례를 구성하는 제2공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 10 is a flow chart showing the refrigerant flow and air flow of the second air conditioning unit constituting an embodiment of the present invention in the second air conditioning mode.

도 11은 제2공조모드일 때 본 발명의 일실시례를 구성하는 제3공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 11 is a flow chart showing the refrigerant flow and air flow of the third air conditioning unit constituting an embodiment of the present invention in the second air conditioning mode.

도 12는 제3공조모드일 때 본 발명의 일실시례의 냉매유동을 보인 구조도.Figure 12 is a structural diagram showing the refrigerant flow in one embodiment of the present invention in the third air conditioning mode.

도 13은 제3공조모드일 때 본 발명의 일실시례를 구성하는 제1공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 13 is a flowchart showing the refrigerant flow and air flow of the first air conditioning unit constituting an embodiment of the present invention in the third air conditioning mode.

도 14는 제3공조모드일 때 본 발명의 일실시례를 구성하는 제2공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 14 is a flow chart showing the refrigerant flow and air flow of the second air conditioning unit constituting an embodiment of the present invention in the third air conditioning mode.

도 15는 제3공조모드일 때 본 발명의 일실시례를 구성하는 제3공조유닛의 냉매유동과 공기유동의 흐름을 보인 순서도. Figure 15 is a flow chart showing the refrigerant flow and air flow of the third air conditioning unit constituting an embodiment of the present invention in the third air conditioning mode.

도 16은 본 발명의 공기조화기의 제2실시례의 개략적인 구성을 보인 구조도.Figure 16 is a structural diagram showing the schematic configuration of a second embodiment of the air conditioner of the present invention.

도 17은 본 발명의 공기조화기의 제3실시례의 개략적인 구성을 보인 구조도.Figure 17 is a structural diagram showing the schematic configuration of a third embodiment of the air conditioner of the present invention.

도 18은 도 17의 제3실시례에 적용된 제1회수열교환기의 제1실시례를 보인 구조도. FIG. 18 is a structural diagram showing a first embodiment of the first recovery heat exchanger applied to the third embodiment of FIG. 17.

도 19는 도 17의 제3실시례에 적용된 제1회수열교환기의 제2실시례를 보인 구조도. FIG. 19 is a structural diagram showing a second embodiment of the first recovery heat exchanger applied to the third embodiment of FIG. 17.

도 20은 도 17의 제3실시례에 적용된 제1회수열교환기의 제3실시례를 보인 구조도. Figure 20 is a structural diagram showing a third embodiment of the first recovery heat exchanger applied to the third embodiment of Figure 17.

이하, 본 발명의 일부 실시례들을 예시적인 도면을 통해 상세하게 설명한다. 각 도면의 구성요소들에 참조부호를 부가함에 있어서, 동일한 구성요소들에 대해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 부호를 가지도록 하고 있음에 유의해야 한다. 또한, 본 발명의 실시례를 설명함에 있어, 관련된 공지구성 또는 기능에 대한 구체적인 설명이 본 발명의 실시례에 대한 이해를 방해한다고 판단되는 경우에는 그 상세한 설명은 생략한다.Hereinafter, some embodiments of the present invention will be described in detail through illustrative drawings. When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

본 발명은 공기조화기에 관한 것으로, 특히 실내공간을 제습할 수 있는 공기조화기이다. 본 발명에서 공기조화기는 공기를 흡입하여 배출하고, 그 과정에서 공기의 온도 및 습도를 제어할 수 있다. 상기 공기조화기의 내외부로 공기가 유동되는 것은 다음과 같이 구분될 수 있다. 먼저 공기조화기 내부에서 제어된 공기가 공기조화기의 외부로 배출되는 것은 (i) 실내공간으로 공급되는 공기(이하 "급기", SA)와 실외로 배출되는 공기(이하 "배기", EA)로 구분할 수 있다. 반대로 외부의 공기가 상기 공기조화기의 내부로 흡입되는 것은 (i) 외부에서 공기조화기의 내부로 유입되는 공기(이하 "외기", OA)와, 실내에서 상기 공기조화기의 내부로 유입되는 공기(이하 "환기", RA)로 구분될 수 있다. The present invention relates to an air conditioner, particularly an air conditioner capable of dehumidifying an indoor space. In the present invention, the air conditioner can suck in air and discharge it, and control the temperature and humidity of the air in the process. The flow of air into and out of the air conditioner can be divided as follows. First, the air controlled inside the air conditioner is discharged to the outside of the air conditioner by (i) air supplied to the indoor space (hereinafter referred to as “supply air”, SA) and air discharged to the outdoors (hereinafter referred to as “exhaust air”, EA). It can be divided into: On the contrary, the outside air that is sucked into the air conditioner is (i) air flowing into the inside of the air conditioner from the outside (hereinafter referred to as "outside air", OA), and air flowing into the inside of the air conditioner from indoors. It can be divided into air (hereinafter “ventilation”, RA).

본 실시례에서, 상기 배기(EA)의 폐열은 재활용될 수 있다. 보다 구체적으로는, 상기 배기(EA) 쪽으로 실내열교환기 냉매의 방열이 이루어지거나, 상기 배기(EA)로부터 상기 실내열교환기의 냉매 쪽으로 흡열이 이루어질 수도 있다. 실내공간의 온/습도 제어 후 버려지는 배기(EA)를 이용하여 메인냉매의 방열 또는 흡열을 하면서 공기조화기의 에너지를 절약할 수 있다. 아래에서 "회수"란 에너지회수를 의미한다. In this embodiment, the waste heat of the exhaust (EA) can be recycled. More specifically, heat from the refrigerant of the indoor heat exchanger may be dissipated toward the exhaust EA, or heat may be absorbed from the exhaust EA toward the refrigerant of the indoor heat exchanger. The energy of the air conditioner can be saved by dissipating or absorbing heat from the main refrigerant by using the exhaust air (EA) discarded after controlling the temperature/humidity of the indoor space. Below, “recovery” means energy recovery.

본 실시례에서, 공기조화기는 메인냉매(제1냉매)와 재생냉매(제2냉매)가 독립된 냉매사이클을 구성할 수 있다. 이때, 상기 메인냉매와 상기 재생냉매는 서로 열교환될 수 있다. 이러한 냉매 대 냉매의 열교환 과정에서 상기 메인냉매에 의한 메인냉매사이클에서 발생되는 폐열이 상기 재생냉매에 의한 재생냉매사이클 쪽으로 흡열될 수 있다. 상기 재생냉매사이클은 폐열을 이용하여 제습로터(460)를 보다 고온환경에서 재생시키면서 공기조화기의 에너지를 절약할 수 있다. 아래에서 "재생"이란 제습로터(460)의 재생을 의미한다. In this embodiment, the air conditioner may configure a refrigerant cycle in which the main refrigerant (first refrigerant) and the regenerated refrigerant (second refrigerant) are independent. At this time, the main refrigerant and the regenerative refrigerant may exchange heat with each other. In this refrigerant-to-refrigerant heat exchange process, waste heat generated in the main refrigerant cycle by the main refrigerant may be absorbed by the regenerative refrigerant toward the regenerative refrigerant cycle. The regenerative refrigerant cycle can save energy in the air conditioner by using waste heat to regenerate the dehumidifying rotor 460 in a higher temperature environment. Below, “regeneration” refers to regeneration of the dehumidification rotor 460.

이하에서는 열회수구조 및 재생구조를 중심으로 본 실시례를 살펴보기로 한다. Below, we will look at this embodiment focusing on the heat recovery structure and regeneration structure.

도 1을 보면, 본 실시례의 공기조화기는 크게 제1공조유닛(U1)과 제2공조유닛(U2), 그리고 제3공조유닛(U3)을 포함할 수 있다. 상기 제1공조유닛(U1), 상기 제2공조유닛(U2)과 제3공조유닛(U3)은 서로 독립된 냉매사이클을 가질 수 있다. 상기 제1공조유닛(U1), 상기 제2공조유닛(U2) 및 상기 제3공조유닛(U3)은 외부공기 또는 실내공기를 실내공간으로 공급하는 실내덕트(S)를 공유할 수 있다. Referring to Figure 1, the air conditioner of this embodiment may largely include a first air conditioning unit (U1), a second air conditioning unit (U2), and a third air conditioning unit (U3). The first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) may have independent refrigerant cycles. The first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) may share an indoor duct (S) that supplies outside air or indoor air to the indoor space.

상기 제1공조유닛(U1), 상기 제2공조유닛(U2)과 제3공조유닛(U3)에는 각각 독립된 메인냉매가 유동할 수 있다. 아래에서는 이를 구분하여, 상기 제1공조유닛(U1)의 냉매는 제1메인냉매, 상기 제2공조유닛(U2)의 냉매는 제2메인냉매, 제3공조유닛(U3)의 냉매는 제3메인냉매로 칭하기로 한다. Independent main refrigerant may flow in the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3). Below, the refrigerant of the first air conditioning unit (U1) is the first main refrigerant, the refrigerant of the second air conditioning unit (U2) is the second main refrigerant, and the refrigerant of the third air conditioning unit (U3) is the third main refrigerant. It will be referred to as the main refrigerant.

한편, 상기 공조유닛들과 독립된 열교환유닛(700,900)에는 상기 메인냉매와 다른 냉매가 유동할 수 있다. 상기 열교환유닛(700,900)에는 재생냉매가 유동할 수 있는데, 상기 열교환유닛(700,900)을 구성하는 제1열교환모듈(700)에는 제1재생냉매가 유동하고, 제2열교환모듈(900)에는 제2재생냉매가 유동할 수 있다. Meanwhile, a refrigerant different from the main refrigerant may flow in the heat exchange units 700 and 900 independent of the air conditioning units. Regenerated refrigerant may flow in the heat exchange units 700 and 900. The first regenerated refrigerant flows in the first heat exchange module 700 constituting the heat exchange units 700 and 900, and the second refrigerant flows in the second heat exchange module 900. Regenerated refrigerant can flow.

본 실시례에서, 상기 제1공조유닛(U1)은 공기를 냉각/가열/제습할 수 있고, 배기(EA)되는 공기의 폐열을 재활용할 수 있다. 상기 제2공조유닛(U2)은 배기(EA)되는 공기의 폐열을 재활용할 수 있으며, 제습로터(460)를 재생할 수 있다. 그리고 상기 제3공조유닛(U3)은 공기를 냉각/제습할 수 있고, 제습로터(460)를 재생할 수 있다.In this embodiment, the first air conditioning unit (U1) can cool/heat/dehumidify air and recycle waste heat of exhausted (EA) air. The second air conditioning unit (U2) can recycle waste heat of exhausted (EA) air and regenerate the dehumidification rotor (460). And the third air conditioning unit (U3) can cool/dehumidify the air and regenerate the dehumidifying rotor (460).

상기 제1공조유닛(U1)은 제1실외기(100)와, 실내기(400) 중 일부를 포함할 수 있다. 상기 제2공조유닛(U2)은 제2실외기(200)와 실내기(400) 중 다른 일부를 포함할 수 있다. 상기 제3공조유닛(U3)은 제3실외기(300)와 실내기(400) 중 나머지 일부를 포함할 수 있다. The first air conditioning unit (U1) may include a first outdoor unit (100) and a portion of an indoor unit (400). The second air conditioning unit (U2) may include another part of the second outdoor unit 200 and the indoor unit 400. The third air conditioning unit (U3) may include the remaining part of the third outdoor unit 300 and the indoor unit 400.

그리고, 상기 제1공조유닛(U1)에는 제1전달모듈(500)이 포함될 수 있고, 제2공조유닛(U2)에는 제2전달모듈(600)이 포함될 수 있으며, 상기 제3공조유닛(U3)에는 제3전달모듈(800)이 포함될 수 있다. 상기 제1전달모듈(500)은 상기 제1실외기(100)와 상기 실내기(400) 사이로 제1메인냉매를 전달할 수 있고, 상기 제2전달모듈(600)은 상기 제2실외기(200)와 상기 실내기(400) 사이로 제2메인냉매를 전달할 수 있으며, 상기 제3전달모듈(800)은 상기 제3실외기(300)와 상기 실내기(400) 사이로 제3메인냉매를 전달할 수 있다. In addition, the first air conditioning unit (U1) may include a first transmission module 500, the second air conditioning unit (U2) may include a second transmission module 600, and the third air conditioning unit (U3) may include ) may include a third transmission module 800. The first transfer module 500 can transfer the first main refrigerant between the first outdoor unit 100 and the indoor unit 400, and the second transfer module 600 can transfer the first main refrigerant between the second outdoor unit 200 and the indoor unit 400. The second main refrigerant can be transferred between the indoor units 400, and the third transfer module 800 can transfer the third main refrigerant between the third outdoor unit 300 and the indoor unit 400.

이하에서는, 상기 제1공조유닛(U1), 상기 제2공조유닛(U2) 및 상기 제3공조유닛(U3)을 구성하는 각 세부구조를 순서대로 살펴보기로 한다. 도 2를 보면, 제어부(1000)는 상기 제1실외기(100), 상기 제2실외기(200), 제3실외기(300), 상기 실내기(400), 상기 제1전달모듈(500), 상기 제2전달모듈(600), 제3전달모듈(800), 제1열교환모듈(700) 및 제2열교환모듈(900)을 제어할 수 있다. 상기 제어부(1000)는 상기 제1실외기(100), 상기 제2실외기(200), 제3실외기(300), 상기 실내기(400), 상기 제1전달모듈(500), 상기 제2전달모듈(600), 제3전달모듈(800), 제1열교환모듈(700) 및 제2열교환모듈(900)을 연결하는 밸브들을 제어하여, 냉매의 유동방향과 유동량을 모두 조절할 수 있다. Hereinafter, each detailed structure constituting the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) will be examined in order. Referring to FIG. 2, the control unit 1000 controls the first outdoor unit 100, the second outdoor unit 200, the third outdoor unit 300, the indoor unit 400, the first transmission module 500, and the third outdoor unit 300. The second transfer module 600, the third transfer module 800, the first heat exchange module 700, and the second heat exchange module 900 can be controlled. The control unit 1000 is configured to control the first outdoor unit 100, the second outdoor unit 200, the third outdoor unit 300, the indoor unit 400, the first transmission module 500, and the second transmission module ( 600), the third transfer module 800, the first heat exchange module 700, and the second heat exchange module 900 are controlled to control both the flow direction and flow amount of the refrigerant.

상기 제어부(1000)의 제어에 의해 상기 제1공조유닛(U1), 상기 제2공조유닛(U2) 및 상기 제3공조유닛(U3)에 포함된 복수의 열교환기들은 응축기로 작동하거나 또는 증발기로 작동할 수 있다. 이러한 제어는 아래에서 설명될 제1공조모드 내지 제3공조모드에 따라 각각 다르게 구현될 수 있다. 여기서 열교환기에는 제1,2실외열교환기(130,230), 제1-제4실내열교환기(421,422,430,435), 제1,2회수열교환기(410,440) 및 제1,2재생열교환기(450,470), 제1,2모듈열교환기(730,930)가 포함될 수 있다. Under the control of the control unit 1000, a plurality of heat exchangers included in the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) operate as a condenser or as an evaporator. It can work. This control may be implemented differently depending on the first to third air conditioning modes, which will be described below. Here, the heat exchangers include the first and second outdoor heat exchangers (130,230), the first and fourth indoor heat exchangers (421,422,430,435), the first and second recovery heat exchangers (410,440), and the first and second regenerative heat exchangers (450,470). 1 and 2 module heat exchangers (730, 930) may be included.

상기 제1전달모듈(500), 상기 제2전달모듈(600) 및 제3전달모듈(800)에는 각각 제1냉매열교환기(530), 제2냉매열교환기(630) 및 제3냉매열교환기(830)가 포함될 수 있다. 상기 제1냉매열교환기(530), 상기 제2냉매열교환기(630) 및 제3냉매열교환기(830)는 응축기 또는 증발기로 동작되지는 않고, 상기 제1냉매열교환기(530)와 제2냉매열교환기(630)의 내부를 흐르는 냉매들 사이의 열교환을 돕는다. The first transfer module 500, the second transfer module 600, and the third transfer module 800 include a first refrigerant heat exchanger 530, a second refrigerant heat exchanger 630, and a third refrigerant heat exchanger, respectively. (830) may be included. The first refrigerant heat exchanger 530, the second refrigerant heat exchanger 630, and the third refrigerant heat exchanger 830 do not operate as condensers or evaporators, and the first refrigerant heat exchanger 530 and the second refrigerant heat exchanger 830 do not operate as condensers or evaporators. It helps heat exchange between refrigerants flowing inside the refrigerant heat exchanger (630).

예를 들어, 도 4를 보면, 제1공조모드에서 제1실내열교환기(421)에 의해 응축된 중온/고압의 제1메인냉매는 제1전달모듈(500)의 제1냉매열교환기(530)로 유입될 수 있다. 이때, 상기 제1냉매열교환기(530)에는 제1 및 제2실내열교환기(421,425)에서 증발된 저온/저압의 제1메인냉매가 흐르고 있다. 따라서, 앞서 제1실내열교환기(421)에 의해 응축된 중온/고압의 제1메인냉매는 상기 제1냉매열교환기(530)를 지날 때 상기 저온/저압의 제1메인냉매에 방열(열교환)하여 액상 냉매로 전환된 후, 상기 제1 및 제2실내열교환기(421,425)로 유입될 수 있다. For example, looking at FIG. 4, the medium temperature/high pressure first main refrigerant condensed by the first indoor heat exchanger 421 in the first air conditioning mode is transferred to the first refrigerant heat exchanger 530 of the first transfer module 500. ) can flow into the At this time, the low-temperature/low-pressure first main refrigerant evaporated from the first and second indoor heat exchangers (421, 425) is flowing through the first refrigerant heat exchanger (530). Therefore, the medium-temperature/high-pressure first main refrigerant previously condensed by the first indoor heat exchanger 421 radiates heat (heat exchange) to the low-temperature/low-pressure first main refrigerant when passing through the first refrigerant heat exchanger 530. After being converted into liquid refrigerant, it can flow into the first and second indoor heat exchangers (421, 425).

각 구성에 대해 살펴보기에 앞서, 설명의 편의를 위해 상기 냉매배관에 대해 먼저 설명하기로 한다. 상기 냉매배관은 총 3개로 구성될 수 있다. 상기 3개의 냉매배관은 저압관, 고압관, 액관으로 구분될 수 있다. 이때, 상기 저압관, 상기 고압관 및 상기 액관은 각각 복수의 기관들이 서로 연결되어 연속된 하나의 저압관, 하나의 고압관과 하나의 액관을 구성할 수 있다. 상기 저압관은 저압의 냉매가 흐르는 기관들을 지칭하는 것으로 볼 수 있고, 상기 고압관은 고압의 냉매가 흐르는 기관들을 지칭하는 것으로 볼 수 있다. Before looking at each configuration, the refrigerant piping will first be described for convenience of explanation. The refrigerant pipe may consist of a total of three. The three refrigerant pipes can be divided into low-pressure pipes, high-pressure pipes, and liquid pipes. At this time, the low-pressure pipe, the high-pressure pipe, and the liquid pipe may each have a plurality of organs connected to each other to form one continuous low-pressure pipe, one high-pressure pipe, and one liquid pipe. The low-pressure pipe can be seen as referring to institutions through which low-pressure refrigerant flows, and the high-pressure pipe can be seen as referring to institutions through which high-pressure refrigerant flows.

이때, 상기 저압관과 상기 고압관은 상기 공기조화기의 운전모드에 따라 다르게 구성될 수 있다. 예를 들어, 상기 공기조화기가 제1공조모드로 운전될 때는 고압관으로 사용되던 기관이, 제2공조모드로 운전될 때는 저압관으로 사용될 수도 있는 것이다. 이와 같은 3배관 구조는 냉매의 유동방향이 가변되도록 할 수 있다. 상기 냉매배관의 구체적인 구조는 아래에서 다시 설명하기로 한다. At this time, the low-pressure pipe and the high-pressure pipe may be configured differently depending on the operation mode of the air conditioner. For example, when the air conditioner is operated in the first air conditioning mode, the engine used as a high pressure pipe may be used as a low pressure pipe when operated in the second air conditioning mode. This three-pipe structure can allow the flow direction of the refrigerant to vary. The specific structure of the refrigerant pipe will be described again below.

그리고, 상기 제1실외기(100), 제2실외기(200) 및 제3실외기(300)는 하나의 실외유닛(100,200,300)을 구성할 수 있다. 상기 실외유닛(100,200,300)은 건물 외부에 배치될 수 있다. 그리고 상기 실내기(400)는 이에 대응하는 실내유닛(400)으로 볼 수도 있다. 상기 실내유닛(400)은 건물의 내부에 배치될 수 있다. 상기 제1전달모듈, 제2전달모듈, 제3전달모듈(800), 제1열교환모듈(700), 제2열교환모듈(900)은 건물의 내부 또는 외부에 배치될 수 있다. Also, the first outdoor unit 100, the second outdoor unit 200, and the third outdoor unit 300 may form one outdoor unit (100, 200, and 300). The outdoor units 100, 200, and 300 may be placed outside the building. Additionally, the indoor unit 400 may be viewed as a corresponding indoor unit 400. The indoor unit 400 may be placed inside a building. The first transfer module, second transfer module, third transfer module 800, first heat exchange module 700, and second heat exchange module 900 may be placed inside or outside the building.

도 1를 참고하여 상기 제1실외기(100)를 살펴보면, 상기 제1실외기(100)의 내부에는 제1실외압축기(110), 상기 제1실외열교환기(130), 제1실외팽창변(135), 제1메인실외밸브(150), 제1서브실외밸브(160) 및 제1어큐뮬레이터(120)가 포함될 수 있다. 그리고, 상기 제1실외기(100)의 내부에는 제1메인냉매가 유동되도록 하는 복수의 냉매배관이 포함될 수 있다.Looking at the first outdoor unit 100 with reference to FIG. 1, the inside of the first outdoor unit 100 includes a first outdoor compressor 110, a first outdoor heat exchanger 130, and a first outdoor expansion valve 135. , a first main outdoor valve 150, a first sub-outdoor valve 160, and a first accumulator 120 may be included. Additionally, the interior of the first outdoor unit 100 may include a plurality of refrigerant pipes through which the first main refrigerant flows.

상기 제1실외기(100)의 냉매배관을 보면, 상기 제1실외압축기(110)와 제1메인실외밸브(150) 사이는 제1압축기 토출관(L101)에 의해 연결될 수 있다. 상기 제1압축기 토출관(L101)은 기본적으로 제1고압관의 일부를 구성할 수 있다. 상기 제1실외열교환기(130)와 상기 제1메인실외밸브(150) 사이는 제1-1실외열교환 연결관(L102)으로 연결될 수 있다. Looking at the refrigerant pipe of the first outdoor unit 100, the first outdoor compressor 110 and the first main outdoor valve 150 may be connected by a first compressor discharge pipe (L101). The first compressor discharge pipe (L101) may basically form a part of the first high pressure pipe. The first outdoor heat exchanger 130 and the first main outdoor valve 150 may be connected through a 1-1 outdoor heat exchange connector (L102).

상기 제1실외기(100)에는 제1메인실외밸브(150)와 제1서브실외밸브(160)가 포함될 수 있다. 상기 제1메인실외밸브(150)와 상기 제1서브실외밸브(160)는 서로 연결되고, 제1메인냉매의 유동 방향을 제어할 수 있다. 본 실시례에서 제1메인실외밸브(150)와 제1서브실외밸브(160)는 각각 사방밸브로 구성된다. The first outdoor unit 100 may include a first main outdoor valve 150 and a first sub-outdoor valve 160. The first main outdoor valve 150 and the first sub-outdoor valve 160 are connected to each other, and the flow direction of the first main refrigerant can be controlled. In this embodiment, the first main outdoor valve 150 and the first sub outdoor valve 160 are each configured as a four-way valve.

상기 제1메인실외밸브(150)는 상기 제1압축기 토출관(L101)과, 상기 제1-1실외열교환 연결관(L102)을 선택적으로 연결할 수 있다. (i) 상기 제1메인실외밸브(150)에 의해 상기 제1압축기 토출관(L101)과 상기 제1-1실외열교환 연결관(L102)이 서로 연결되면, 상기 제1실외압축기(110)에서 토출된 고온/고압의 제1메인냉매의 일부는 상기 제1실외열교환기(130)로 전달될 수 있다.(제1공조모드 및 제3공조모드) (ii) 만약 상기 제1메인실외밸브(150)에 의해 상기 제1압축기 토출관(L101)과 상기 제1-1실외열교환 연결관(L102)이 서로 차단되면, 상기 제1실외압축기(110)에서 토출된 고온/고압의 제1메인냉매의 전부는 상기 제1서브실외밸브(160)를 통해 후술할 제2실내열교환기(425)에 전달될 수 있다.(제2공조모드)The first main outdoor valve 150 can selectively connect the first compressor discharge pipe (L101) and the 1-1 outdoor heat exchange connection pipe (L102). (i) When the first compressor discharge pipe (L101) and the 1-1 outdoor heat exchange connection pipe (L102) are connected to each other by the first main outdoor valve (150), the first outdoor compressor (110) A portion of the discharged high-temperature/high-pressure first main refrigerant may be transferred to the first outdoor heat exchanger 130 (first air conditioning mode and third air conditioning mode) (ii) If the first main outdoor valve ( 150), when the first compressor discharge pipe (L101) and the 1-1 outdoor heat exchange connection pipe (L102) are blocked from each other, the high temperature/high pressure first main refrigerant discharged from the first outdoor compressor (110) All of the can be transmitted to the second indoor heat exchanger 425, which will be described later, through the first sub-outdoor valve 160. (second air conditioning mode)

상기 제1서브실외밸브(160)는 제1실외기(100)의 외부에서 전달된 저온/저압의 냉매를 상기 제1어큐뮬레이터(120)로 전달할 수 있다. 그리고, 상기 제1서브실외밸브(160)는 제1압축기 토출관(L101)을 통해 상기 제1실외압축기(110)와 연결될 수 있고, 제1-1실외기 연결관(L103)을 통해 제1전달모듈(500)과 연결될 수 있다. 따라서, 상기 제1서브실외밸브(160)는 상기 제1실외압축기(110)에서 토출된 고온/고압의 제1메인냉매의 전부 또는 일부를 상기 제1전달모듈(500)로 전달할 수 있다. The first sub-outdoor valve 160 may deliver low-temperature/low-pressure refrigerant delivered from the outside of the first outdoor unit 100 to the first accumulator 120. In addition, the first sub-outdoor valve 160 may be connected to the first outdoor compressor 110 through the first compressor discharge pipe (L101), and the first transmission may be transmitted through the 1-1 outdoor unit connection pipe (L103). It can be connected to the module 500. Accordingly, the first sub-outdoor valve 160 can transfer all or part of the high-temperature/high-pressure first main refrigerant discharged from the first outdoor compressor 110 to the first delivery module 500.

상기 제1실외열교환기(130)는 응축기 또는 증발기로 동작될 수 있다. 예를 들어, 상기 공기조화기가 제1공조모드와 제3공조모드로 동작할 때, 상기 제1실외열교환기(130)는 응축기가 될 수 있고, 제2공조모드일 때는 상기 제1실외열교환기(130)는 증발기가 될 수 있다. 이를 위해, 상기 제1실외열교환기(130)에는 제1-2실외열교환 연결관(L121)을 통해 제1실외팽창변(135)이 연결될 수 있다. 그리고, 상기 제1실외팽창변(135)은 제1-2실외기 연결관(L122)을 통해서 상기 제1전달모듈(500)에 연결될 수 있다. The first outdoor heat exchanger 130 may operate as a condenser or evaporator. For example, when the air conditioner operates in the first air conditioning mode and the third air conditioning mode, the first outdoor heat exchanger 130 may be a condenser, and when the air conditioner is operated in the second air conditioning mode, the first outdoor heat exchanger 130 may be a condenser. (130) can be an evaporator. To this end, the first outdoor expansion valve 135 may be connected to the first outdoor heat exchanger 130 through the 1-2 outdoor heat exchange connector L121. Additionally, the first outdoor expansion valve 135 may be connected to the first transmission module 500 through a first-second outdoor unit connection pipe L122.

다음으로 제2실외기(200)를 살펴보면, 상기 제2실외기(200)는 상기 제1실외기(100)와 유사한 구조를 가질 수 있다. 즉, 상기 제2실외기(200)는 제2실외압축기(210), 제2실외열교환기(230), 제2실외팽창변(235), 제2메인실외밸브(250), 제2서브실외밸브(260) 및 제2어큐뮬레이터(220)가 포함될 수 있다. 그리고, 상기 제2실외기(200)의 내부에는 제2메인냉매가 유동되도록 하는 복수의 냉매배관이 포함될 수 있다. Next, looking at the second outdoor unit 200, the second outdoor unit 200 may have a structure similar to the first outdoor unit 100. That is, the second outdoor unit 200 includes a second outdoor compressor 210, a second outdoor heat exchanger 230, a second outdoor expansion valve 235, a second main outdoor valve 250, and a second sub-outdoor valve ( 260) and a second accumulator 220 may be included. Also, the interior of the second outdoor unit 200 may include a plurality of refrigerant pipes through which the second main refrigerant flows.

상기 제2실외기(200)의 냉매배관을 보면, 상기 제2실외압축기(210)와 제2메인실외밸브(250) 사이는 제2압축기 토출관(L201)에 의해 연결될 수 있다. 상기 제2압축기 토출관(L201)은 기본적으로 제2고압관의 일부를 구성할 수 있다. 상기 제2실외열교환기(230)와 상기 제2메인실외밸브(250) 사이는 제2-1실외열교환 연결관(L202)으로 연결될 수 있다. Looking at the refrigerant pipe of the second outdoor unit 200, the second outdoor compressor 210 and the second main outdoor valve 250 may be connected by the second compressor discharge pipe L201. The second compressor discharge pipe (L201) may basically form a part of the second high pressure pipe. The second outdoor heat exchanger 230 and the second main outdoor valve 250 may be connected through a 2-1 outdoor heat exchange connector (L202).

상기 제2실외기(200)에는 제2메인실외밸브(250)와 제2서브실외밸브(260)가 포함될 수 있다. 상기 제2메인실외밸브(250)와 상기 제2서브실외밸브(260)는 서로 연결되고, 제2메인냉매의 유동 방향을 제어할 수 있다. 본 실시례에서 제2메인실외밸브(250)와 제2서브실외밸브(260)는 각각 사방밸브로 구성된다. The second outdoor unit 200 may include a second main outdoor valve 250 and a second sub-outdoor valve 260. The second main outdoor valve 250 and the second sub-outdoor valve 260 are connected to each other, and the flow direction of the second main refrigerant can be controlled. In this embodiment, the second main outdoor valve 250 and the second sub outdoor valve 260 are each configured as a four-way valve.

상기 제2메인실외밸브(250)는 상기 제2압축기 토출관(L201)과, 상기 제2-1실외열교환 연결관(L202)을 선택적으로 연결할 수 있다. (i) 상기 제2메인실외밸브(250)에 의해 상기 제2압축기 토출관(L201)과 상기 제2-1실외열교환 연결관(L202)이 서로 연결되면, 상기 제2실외압축기(210)에서 토출된 고온/고압의 냉매의 일부는 상기 제2실외열교환기(230)로 전달될 수 있다.(제1공조모드) (ii) 만약 상기 제2메인실외밸브(250)에 의해 상기 제2압축기 토출관(L201)과 상기 제2-1실외열교환 연결관(L202)이 서로 차단되면, 상기 제2실외압축기(210)에서 토출된 고온/고압의 냉매의 전부는 상기 제2서브실외밸브(260)를 통해 후술할 제1열교환모듈(700)에 전달될 수 있다.(제2공조모드 및 제3공조모드)The second main outdoor valve 250 can selectively connect the second compressor discharge pipe (L201) and the 2-1 outdoor heat exchange connection pipe (L202). (i) When the second compressor discharge pipe (L201) and the 2-1 outdoor heat exchange connector (L202) are connected to each other by the second main outdoor valve (250), the second outdoor compressor (210) A portion of the discharged high-temperature/high-pressure refrigerant may be transferred to the second outdoor heat exchanger 230. (first air conditioning mode) (ii) If the second main outdoor valve 250 is used, the second compressor When the discharge pipe (L201) and the 2-1 outdoor heat exchange connection pipe (L202) are blocked from each other, all of the high-temperature/high-pressure refrigerant discharged from the second outdoor compressor (210) is transferred to the second sub-outdoor valve (260). ) can be transmitted to the first heat exchange module 700, which will be described later (second air conditioning mode and third air conditioning mode).

상기 제2서브실외밸브(260)는 제2실외기(200)의 외부에서 전달된 저온/저압의 제2메인냉매를 상기 제2어큐뮬레이터(220)로 전달할 수 있다. 그리고, 상기 제2서브실외밸브(260)는 상기 제2실외압축기(210)와 제2압축기 토출관(L201)을 통해 연결될 수 있고, 제2-1실외기 연결관(L203)을 통해 제2전달모듈(600)과 연결될 수 있다. 따라서, 상기 제2서브실외밸브(260)는 상기 제2실외압축기(210)에서 토출된 고온/고압의 제2메인냉매냉매의 전부 또는 일부를 상기 제2전달모듈(600)로 전달할 수 있다. The second sub-outdoor valve 260 may transmit the low-temperature/low-pressure second main refrigerant delivered from the outside of the second outdoor unit 200 to the second accumulator 220. In addition, the second sub-outdoor valve 260 may be connected to the second outdoor compressor 210 through the second compressor discharge pipe (L201), and the second transmission may be transmitted through the 2-1 outdoor unit connection pipe (L203). It can be connected to the module 600. Accordingly, the second sub-outdoor valve 260 can transfer all or part of the high-temperature/high-pressure second main refrigerant discharged from the second outdoor compressor 210 to the second delivery module 600.

상기 제2실외열교환기(230)는 응축기 또는 증발기로 동작될 수 있다. 예를 들어, 상기 공기조화기가 제1공조모드로 동작할 때, 상기 제2실외열교환기(230)는 응축기가 될 수 있고, 제2공조모드 또는 제3공조모드일 때는 상기 제2실외열교환기(230)는 증발기가 될 수 있다. 이를 위해, 상기 제2실외열교환기(230)에는 제2-2실외열교환 연결관(L221)을 통해 제2실외팽창변(235)이 연결될 수 있다. 그리고, 상기 제2실외팽창변(235)은 제2-2실외기 연결관(L222)을 통해서 상기 제2전달모듈(600)에 연결될 수 있다. The second outdoor heat exchanger 230 may operate as a condenser or evaporator. For example, when the air conditioner operates in the first air conditioning mode, the second outdoor heat exchanger 230 may be a condenser, and when the air conditioner operates in the second or third air conditioning mode, the second outdoor heat exchanger 230 may be a condenser. (230) can be an evaporator. To this end, the second outdoor expansion valve 235 may be connected to the second outdoor heat exchanger 230 through the 2-2 outdoor heat exchange connector L221. In addition, the second outdoor expansion valve 235 may be connected to the second transmission module 600 through a 2-2 outdoor unit connection pipe (L222).

다음으로 제3실외기(300)를 살펴보면, 상기 제3실외기(300)는 상기 제1실외기(100) 및 제2실외기(200)와 유사한 구조를 가질 수 있다. 즉, 상기 제3실외기(300)는 제3실외압축기(310), 제3실외열교환기(330), 제3실외팽창변(335), 제3메인실외밸브(350), 제3서브실외밸브(360) 및 제3어큐뮬레이터(420)가 포함될 수 있다. 그리고, 상기 제3실외기(300)의 내부에는 제3메인냉매가 유동되도록 하는 복수의 냉매배관이 포함될 수 있다. Next, looking at the third outdoor unit 300, the third outdoor unit 300 may have a similar structure to the first outdoor unit 100 and the second outdoor unit 200. That is, the third outdoor unit 300 includes a third outdoor compressor 310, a third outdoor heat exchanger 330, a third outdoor expansion valve 335, a third main outdoor valve 350, and a third sub-outdoor valve ( 360) and a third accumulator 420 may be included. Additionally, the third outdoor unit 300 may include a plurality of refrigerant pipes through which the third main refrigerant flows.

상기 제3실외기(300)의 냉매배관을 보면, 상기 제3실외압축기(310)와 제3메인실외밸브(350) 사이는 제3압축기 토출관(L301)에 의해 연결될 수 있다. 상기 제3압축기 토출관(L301)은 기본적으로 제3고압관의 일부를 구성할 수 있다. 상기 제3실외열교환기(330)와 상기 제3메인실외밸브(350) 사이는 제3-1실외열교환 연결관(L302)으로 연결될 수 있다. Looking at the refrigerant pipe of the third outdoor unit 300, the third outdoor compressor 310 and the third main outdoor valve 350 may be connected by a third compressor discharge pipe (L301). The third compressor discharge pipe (L301) may basically form a part of the third high pressure pipe. The third outdoor heat exchanger 330 and the third main outdoor valve 350 may be connected through a 3-1 outdoor heat exchange connector (L302).

상기 제3실외기(300)에는 제3메인실외밸브(350)와 제3서브실외밸브(360)가 포함될 수 있다. 상기 제3메인실외밸브(350)와 상기 제3서브실외밸브(360)는 서로 연결되고, 제3메인냉매의 유동 방향을 제어할 수 있다. 본 실시례에서 제3메인실외밸브(350)와 제3서브실외밸브(360)는 각각 사방밸브로 구성된다. The third outdoor unit 300 may include a third main outdoor valve 350 and a third sub outdoor valve 360. The third main outdoor valve 350 and the third sub-outdoor valve 360 are connected to each other, and the flow direction of the third main refrigerant can be controlled. In this embodiment, the third main outdoor valve 350 and the third sub outdoor valve 360 are each configured as a four-way valve.

상기 제3메인실외밸브(350)는 상기 제3압축기 토출관(L301)과, 상기 제3-1실외열교환 연결관(L302)을 선택적으로 연결할 수 있다. (i) 상기 제3메인실외밸브(350)에 의해 상기 제3압축기 토출관(L301)과 상기 제3-1실외열교환 연결관(L302)이 서로 연결되면, 상기 제3실외압축기(310)에서 토출된 고온/고압의 제3메인냉매의 일부는 상기 제3실외열교환기(330)로 전달될 수 있다.(제1공조모드 및 제3공조모드) (ii) 만약 상기 제3메인실외밸브(350)에 의해 상기 제3압축기 토출관(L301)과 상기 제3-1실외열교환 연결관(L302)이 서로 차단되면, 상기 제3실외압축기(310)에서 토출된 고온/고압의 제3메인냉매의 전부는 상기 제3서브실외밸브(360)를 통해 후술할 제2열교환모듈(900)에 전달될 수 있다.(제2공조모드)The third main outdoor valve 350 can selectively connect the third compressor discharge pipe (L301) and the 3-1 outdoor heat exchange connection pipe (L302). (i) When the third compressor discharge pipe (L301) and the 3-1 outdoor heat exchange connector (L302) are connected to each other by the third main outdoor valve (350), the third outdoor compressor (310) A portion of the discharged high-temperature/high-pressure third main refrigerant may be transferred to the third outdoor heat exchanger 330 (first air conditioning mode and third air conditioning mode) (ii) If the third main outdoor valve ( When the third compressor discharge pipe (L301) and the 3-1 outdoor heat exchange connection pipe (L302) are blocked from each other by 350), the high temperature/high pressure third main refrigerant discharged from the third outdoor compressor (310) All of the can be transmitted to the second heat exchange module 900, which will be described later, through the third sub-outdoor valve 360. (second air conditioning mode)

상기 제3서브실외밸브(360)는 제3실외기(300)의 외부에서 전달된 저온/저압의 제3메인냉매를 상기 제3어큐뮬레이터(420)로 전달할 수 있다. 그리고, 상기 제3서브실외밸브(360)는 상기 제3실외압축기(310)와 제3압축기 토출관(L301)을 통해 연결될 수 있고, 제3-1실외기 연결관(L303)을 통해 제3전달모듈(800)과 연결될 수 있다. 따라서, 상기 제3서브실외밸브(360)는 상기 제3실외압축기(310)에서 토출된 고온/고압의 제3메인냉매의 전부 또는 일부를 상기 제3전달모듈(800)로 전달할 수 있다. The third sub-outdoor valve 360 may deliver the low-temperature/low-pressure third main refrigerant delivered from the outside of the third outdoor unit 300 to the third accumulator 420. In addition, the third sub-outdoor valve 360 may be connected to the third outdoor compressor 310 through a third compressor discharge pipe (L301), and may be transmitted to the third outdoor compressor through a 3-1 outdoor unit connection pipe (L303). It can be connected to the module 800. Accordingly, the third sub-outdoor valve 360 can transfer all or part of the high-temperature/high-pressure third main refrigerant discharged from the third outdoor compressor 310 to the third delivery module 800.

상기 제3실외열교환기(330)는 응축기 또는 증발기로 동작될 수 있다. 예를 들어, 상기 공기조화기가 제1공조모드와 제3공조모드로 동작할 때, 상기 제3실외열교환기(330)는 응축기가 될 수 있고, 제2공조모드일 때는 상기 제3실외열교환기(330)는 증발기가 될 수 있다. 이를 위해, 상기 제3실외열교환기(330)에는 제3-2실외열교환 연결관(L321)을 통해 제3실외팽창변(335)이 연결될 수 있다. 그리고, 상기 제3실외팽창변(335)은 제3-2실외기 연결관(L322)을 통해서 상기 제3전달모듈(800)에 연결될 수 있다. The third outdoor heat exchanger 330 may operate as a condenser or evaporator. For example, when the air conditioner operates in the first air conditioning mode and the third air conditioning mode, the third outdoor heat exchanger 330 may be a condenser, and when the air conditioner is operated in the second air conditioning mode, the third outdoor heat exchanger 330 may be a condenser. (330) may be an evaporator. To this end, the third outdoor expansion valve 335 may be connected to the third outdoor heat exchanger 330 through the 3-2 outdoor heat exchange connector L321. In addition, the third outdoor expansion valve 335 may be connected to the third transmission module 800 through a 3-2 outdoor unit connection pipe (L322).

다음으로, 상기 실내기(400)를 살펴보면, 상기 실내기(400)는 실내덕트(S)를 형성할 수 있다. 상기 실내덕트(S)에는 외기(OA) 또는 환기(RA)가 도입될 수 있고, 상기 실내덕트(S) 내부의 공기는 급기(SA) 또는 배기(EA)로 배출될 수 있다. 즉, 상기 실내덕트(S)는 상기 실내기(400)에 의해 형성된 일종의 공기 통로라고 할 수 있다. Next, looking at the indoor unit 400, the indoor unit 400 may form an indoor duct (S). Outside air (OA) or ventilation (RA) may be introduced into the indoor duct (S), and the air inside the indoor duct (S) may be discharged as supply air (SA) or exhaust air (EA). In other words, the indoor duct S can be said to be a type of air passage formed by the indoor unit 400.

상기 실내덕트(S)에는 복수의 공기 흡입구 및 공기 배출구가 배치될 수 있다. 도 1을 보면, 상기 실내덕트(S)에는 외부의 공기인 외기(OA)가 유입되는 제1외기구(G1) 및 제2외기구(G2)가 서로 독립되게 배치된다. 상기 제1외기구(G1) 및 상기 제2외기구(G2)를 통해 각각 외기(OA)가 상기 실내덕트(S)의 내부로 유입될 수 있다. A plurality of air intakes and air outlets may be disposed in the indoor duct (S). Referring to FIG. 1, a first outdoor device (G1) and a second outdoor device (G2) through which outdoor air (OA), which is external air, flows into the indoor duct (S) are arranged independently of each other. Outdoor air (OA) may flow into the indoor duct (S) through the first external device (G1) and the second external device (G2), respectively.

상기 실내덕트(S)에는 실내덕트(S) 내부에서 제어된 공기가 실내공간으로 공급되는 급기구(G3)가 배치될 수 있다. 상기 급기구(G3)를 통해서 제습, 가열 또는 냉각된 공기가 실내공간으로 공급될 수 있다. 상기 급기구(G3)는 상기 제1외기구(G1)의 반대방향을 향할 수 있다. The indoor duct (S) may be provided with a supply opening (G3) through which air controlled within the indoor duct (S) is supplied to the indoor space. Dehumidified, heated, or cooled air can be supplied to the indoor space through the air supply opening G3. The air supply port (G3) may face a direction opposite to the first external device (G1).

상기 실내덕트(S)에는 실내공간의 공기(환기(RA))가 다시 상기 실내덕트(S) 내부로 유입되는 환기구(G4)가 배치될 수 있다. 상기 환기구(G4)를 통해 환기(RA)가 상기 실내덕트(S)로 유입되어 다시 제어될 수 있다. The indoor duct (S) may be provided with a ventilation port (G4) through which air (ventilation (RA)) from the indoor space flows back into the indoor duct (S). Ventilation (RA) flows into the indoor duct (S) through the ventilation hole (G4) and can be controlled again.

상기 실내덕트(S)에는 하나 또는 복수의 배기구가 배치될 수 있다. 상기 배기구는 상기 실내덕트(S)의 내부에서 외부공간으로 버려지는 공기(배기(EA))의 토출을 위한 것이다. 본 실시례에서, 상기 배기구는 제1배기구(G5)와 제2배기구(G6)를 포함한다. 이와 다르게, 상기 배기구는 하나로 구성되거나, 3개 이상일 수도 있다. One or more exhaust ports may be disposed in the indoor duct (S). The exhaust port is for discharging air (exhaust air (EA)) that is discarded from the inside of the indoor duct (S) to the external space. In this embodiment, the exhaust port includes a first exhaust port (G5) and a second exhaust port (G6). Alternatively, the exhaust port may consist of one exhaust port, or it may consist of three or more exhaust ports.

상기 제1배기구(G5)와 상기 제2배기구(G6)와 인접한 위치에는 각각 제1회수열교환기(410)와 제2회수열교환기(440)가 배치될 수 있다. 상기 제1회수열교환기(410)와 상기 제2회수열교환기(440)의 냉매는 각각 상기 제1배기구(G5)와 상기 제2배기구(G6)를 통해 배출되는 외기(OA)에 방열하거나, 외기(OA)로부터 흡열할 수 있다. A first recovery heat exchanger 410 and a second recovery heat exchanger 440 may be disposed adjacent to the first exhaust port G5 and the second exhaust port G6, respectively. The refrigerant of the first recovery heat exchanger 410 and the second recovery heat exchanger 440 radiates heat to the outside air (OA) discharged through the first exhaust port (G5) and the second exhaust port (G6), respectively, or It can absorb heat from outside air (OA).

상기 외기(OA)는 외부공간의 공기 보다 온도가 낮거나(하절기), 온도가 높다(동절기 또는 간절기). 예를 들어, 하절기에는 외부의 기온 보다 낮은 온도의 외기(OA)로 냉매가 방열하면 방열효율이 높아질 수 있고, 동절기에는 외부의 기온 보다 높은 온도의 외기(OA)로부터 냉매가 흡열하면 흡열효율이 높아질 수 있다. 결과적으로, 상기 제1배기구(G5)와 상기 제2배기구(G6)와 인접한 위치에 있는 상기 제1회수열교환기(410)와 상기 제2회수열교환기(440)를 통해 공기조화기의 냉각사이클 효율을 높일 수 있는 것이다. 상기 제1회수열교환기(410)와 상기 제2회수열교환기(440)의 회수는 에너지회수를 의미할 수 있다. The outdoor air (OA) has a lower temperature (summer season) or a higher temperature (winter season or inter-seasonal season) than the air in the outside space. For example, in the summer, heat dissipation efficiency can be increased if the refrigerant radiates heat to the outside air (OA) with a temperature lower than the outside air temperature, and in the winter, if the refrigerant absorbs heat from the outside air (OA) with a temperature higher than the outside air temperature, the heat absorption efficiency can be increased. It can get higher. As a result, the cooling cycle of the air conditioner is performed through the first recovery heat exchanger 410 and the second recovery heat exchanger 440 located adjacent to the first exhaust port (G5) and the second exhaust port (G6). This can increase efficiency. Recovery of the first recovery heat exchanger 410 and the second recovery heat exchanger 440 may mean energy recovery.

상기 실내덕트(S)에는 복수의 공조팬이 배치될 수 있다. 상기 공조팬은 상기 실내덕트(S) 내부의 공기흐름을 원활하게 하기 위한 것이다. 본 실시례에서, 상기 공조팬은 제1공조팬(F1), 제2공조팬(F2) 및 제3공조팬(F3)을 포함한다. 상기 제1공조팬(F1)은 상기 환기구(G4)의 안쪽에 배치된다. 상기 제2공조팬(F2)은 상기 급기구(G3)의 안쪽에 배치된다. 상기 제3공조팬(F3)은 상기 제2배기구(G6)의 안쪽에 배치된다. A plurality of air conditioning fans may be disposed in the indoor duct (S). The air conditioning fan is used to smooth airflow inside the indoor duct (S). In this embodiment, the air conditioning fan includes a first air conditioning fan (F1), a second air conditioning fan (F2), and a third air conditioning fan (F3). The first air conditioning fan (F1) is disposed inside the ventilation hole (G4). The second air conditioning fan (F2) is disposed inside the air supply opening (G3). The third air conditioning fan (F3) is disposed inside the second exhaust port (G6).

상기 실내기(400)의 내부에는 제1실내열교환기(421), 제2실내열교환기(425), 제3실내열교환기(430), 제4실내열교환기(435), 제1회수열교환기(410), 제2회수열교환기(440), 제1재생열교환기(450), 제2재생열교환기(470), 제습로터(460) 및 재생히터(465) 등이 배치될 수 있다. 이러한 실내기(400) 내부의 구성들은 상기 제1실외기(100) 및 제2실외기(200)와 함께 외기(OA) 또는 환기(RA)를 제어할 수 있다. 여기서 제어란, 공기를 가열, 냉각 또는 제습하는 것을 포함할 수 있다. Inside the indoor unit 400, a first indoor heat exchanger 421, a second indoor heat exchanger 425, a third indoor heat exchanger 430, a fourth indoor heat exchanger 435, and a first recovery heat exchanger ( 410), a second recovery heat exchanger 440, a first regenerative heat exchanger 450, a second regenerative heat exchanger 470, a dehumidifying rotor 460, a regenerative heater 465, etc. may be disposed. The internal components of the indoor unit 400 can control outdoor air (OA) or ventilation (RA) together with the first outdoor unit 100 and the second outdoor unit 200. Control here may include heating, cooling, or dehumidifying the air.

상기 제1회수열교환기(410)는 응축기(제1공조모드 및 제3공조모드) 또는 증발기(제2공조모드)로 동작될 수 있다. 상기 제1회수열교환기(410)가 응축기로 동작되면, 상기 제1회수열교환기(410)의 냉매는 상기 실내기(400)에서 외부(G5)로 배출되는 배기(EA)로 방열할 수 있다. 이때, 상기 배기(EA)는 외부의 공기 보다 온도가 낮기 때문에 냉매의 방열량이 늘어날 수 있다. 이에 따라 제1공조유닛(U1)에 의한 냉동사이클의 운전 고압이 낮아져 전력소모가 줄어들 수 있다. The first recovery heat exchanger 410 may be operated as a condenser (first and third air conditioning modes) or an evaporator (second air conditioning mode). When the first recovery heat exchanger 410 operates as a condenser, the refrigerant in the first recovery heat exchanger 410 may dissipate heat into the exhaust EA discharged from the indoor unit 400 to the outside G5. At this time, because the exhaust air (EA) has a lower temperature than the external air, the amount of heat dissipation of the refrigerant may increase. Accordingly, the operating high pressure of the refrigeration cycle by the first air conditioning unit (U1) is lowered, thereby reducing power consumption.

그리고, 상기 제1회수열교환기(410)가 증발기로 동작되면, 상기 제1회수열교환기(410)의 냉매는 상기 실내기(400)에서 외부(G5)로 배출되는 배기(EA)로부터 흡열할 수 있다. 이때, 상기 배기(EA)는 외부의 공기 보다 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제1공조유닛(U1)에 의한 냉동사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. And, when the first recovery heat exchanger 410 is operated as an evaporator, the refrigerant of the first recovery heat exchanger 410 can absorb heat from the exhaust EA discharged from the indoor unit 400 to the outside G5. there is. At this time, since the temperature of the exhaust EA is higher than that of the external air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the first air conditioning unit (U1) increases, thereby reducing power consumption.

결과적으로, 상기 제1회수열교환기(410)는 응축기로 동작되거나, 증발기로 동작될 때 모두 배기(EA)를 활용하므로, 상기 제1공조유닛(U1)의 냉동사이클을 운전하는데 필요한 전력의 소모를 줄이는 기능을 할 수 있다. As a result, the first recovery heat exchanger 410 utilizes exhaust (EA) when operating as a condenser or as an evaporator, thus consuming the power required to operate the refrigeration cycle of the first air conditioning unit (U1). It can function to reduce .

이를 위해서, 상기 제1회수열교환기(410)는 배기(EA)가 배출되는 제1배기구(G5)에 인접하게 배치될 수 있다. 달리 표현하면, 상기 제1회수열교환기(410)는 상기 제1회수열교환기(410)의 표면이 상기 제1배기구(G5)를 향하도록 상기 실내덕트(S) 내부에 배치될 수 있다. 도 1을 보면, 상기 제1회수열교환기(410)를 거친 배기(EA)는 제1배기구(G5)를 통해 외부 공간으로 배출될 수 있다. To this end, the first recovery heat exchanger 410 may be placed adjacent to the first exhaust port G5 through which the exhaust gas EA is discharged. In other words, the first recovery heat exchanger 410 may be disposed inside the indoor duct (S) such that the surface of the first recovery heat exchanger 410 faces the first exhaust port (G5). Referring to FIG. 1, the exhaust EA that has passed through the first recovery heat exchanger 410 may be discharged to the external space through the first exhaust port G5.

상기 실내덕트(S)에는 제1바이패스(B1)가 배치될 수 있다. 상기 제1바이패스(B1)는 상기 제1공조유닛(U1) 측에 배치될 수 있다. 상기 제1바이패스(B1)는 상기 실내덕트(S) 내부에 형성된 경로의 일부로 볼 수 있다. 상기 제1바이패스(B1)에는 공기의 유동을 위한 송풍팬이 포함될 수 있다.A first bypass (B1) may be disposed in the indoor duct (S). The first bypass (B1) may be disposed on the side of the first air conditioning unit (U1). The first bypass (B1) can be viewed as part of a path formed inside the indoor duct (S). The first bypass B1 may include a blowing fan for air flow.

상기 제1바이패스(B1)는 (i) 상기 환기구(G4)를 통해 유입된 환기(RA)가 상기 제1회수열교환기(410)를 거쳐 배기(EA)가 되어 제1배기구(G5)로 이동하는 경로와, (ii) 상기 제1외기구(G1)를 통해 유입된 외기(OA)가 상기 제1실내열교환기(421) 및 제2실내열교환기(425)를 향하는 경로를 서로 이어줄 수 있다. 따라서, 상기 환기구(G4)로 유입된 환기(RA)의 일부는 상기 제1회수열교환기(410)를 거쳐 외부로 배출되는 배기(EA)가 되고, 나머지 일부는 상기 제1바이패스(B1)를 통해 이동할 수 있다. 상기 제1바이패스(B1)를 통해 이동한 공기는 상기 제1외기구(G1)를 통해 유입된 외기(OA)와 혼합되어 상기 제1실내열교환기(421) 및 제2실내열교환기(425)로 유동될 수 있다. The first bypass (B1) is (i) ventilation (RA) introduced through the ventilation port (G4) becomes exhaust (EA) through the first recovery heat exchanger (410) and flows to the first exhaust port (G5). The moving path and (ii) the path of the outside air (OA) introduced through the first outside device (G1) toward the first indoor heat exchanger (421) and the second indoor heat exchanger (425) are connected to each other. You can. Accordingly, part of the ventilation (RA) flowing into the ventilation opening (G4) becomes exhaust (EA) discharged to the outside through the first recovery heat exchanger (410), and the remaining part becomes the first bypass (B1). You can move through. The air moving through the first bypass (B1) is mixed with the outside air (OA) introduced through the first outside device (G1) to form the first indoor heat exchanger (421) and the second indoor heat exchanger (425). ) can flow.

이처럼, 본 실시례에서 상기 환기(RA)는 모두 배기(EA)가 되어 상기 제1배기구(G5)로 배출되지 않고, 일부가 상기 제1바이패스(B1)를 통해 다시 활용될 수 있다. 하절기를 예로 들면, 실내공간에서 유입된 환기(RA)의 온도는 외부에서 공급되는 외기(OA)의 온도 보다 낮다. 따라서, 상기 제1바이패스(B1)를 통해 이동하는 공기는 외기(OA)와 섞이면서 공기의 온도를 낮출 수 있고, 제1공조유닛(U1)의 구동효율을 높여줄 수 있다. As such, in this embodiment, all of the ventilation (RA) becomes exhaust (EA) and is not discharged to the first exhaust port (G5), and part of it can be reused through the first bypass (B1). Taking the summer as an example, the temperature of ventilation (RA) introduced from an indoor space is lower than the temperature of outdoor air (OA) supplied from outside. Accordingly, the air moving through the first bypass (B1) mixes with the outside air (OA), thereby lowering the temperature of the air and increasing the driving efficiency of the first air conditioning unit (U1).

상기 제1바이패스(B1)를 기준으로, 상기 제1회수열교환기(410)의 반대편에는 상기 제1실내열교환기(421)와 제2실내열교환기(425)가 배치될 수 있다. 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 하나의 1차실내열교환기(420)를 구성할 수 있다. 상기 1차실내열교환기(420)는 외기(OA) 또는 환기(RA)를 냉각, 가열 또는 제습할 수 있다. 본 실시례에서 상기 1차실내열교환기(420)는 제1실내열교환기(421)와 제2실내열교환기(425)로 구성되지만, 상기 제1실내열교환기(421)와 제2실내열교환기(425) 중 어느 하나는 생략될 수도 있다. Based on the first bypass (B1), the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be disposed on the opposite side of the first recovery heat exchanger 410. The first indoor heat exchanger 421 and the second indoor heat exchanger 425 may form one primary indoor heat exchanger 420. The primary indoor heat exchanger 420 can cool, heat, or dehumidify outside air (OA) or ventilation (RA). In this embodiment, the first indoor heat exchanger 420 is composed of a first indoor heat exchanger 421 and a second indoor heat exchanger 425, but the first indoor heat exchanger 421 and the second indoor heat exchanger ( 425), any one of them may be omitted.

이처럼, 본 실시례에서 상기 1차실내열교환기(420)가 두 개의 열교환기(제1실내열교환기(421), 제2실내열교환기(425))로 구성되므로, 부하 조건 또는 환경 조건에 따라 다양한 제어가 가능할 수 있다. 예를 들어, (i) 상기 제1실내열교환기(421) 및 상기 제2실내열교환기(425)를 모두 구동하여 냉각/제습성능을 높일 수 있고(고부하 환경, 제1공조모드 또는 제3공조모드), (ii) 상기 제1실내열교환기(421) 및 상기 제2실내열교환기(425) 중 하나만 구동하여 냉각/제습성능을 구현할 수도 있고(중부하 환경), (iii) 상기 제1실내열교환기(421)는 증발기로 구동하고 상기 제2실내열교환기(425)는 응축기로 구동하여 제습 및 난방기능을 구현할 수도 있다(저부하 환경, 제2공조모드). 이처럼 부하 조건 또는 환경 조건에 따라 상기 1차실내열교환기(420)를 다르게 제어함으로써, 공기조화기의 구동에 필요한 소비전력을 줄일 수 있다. As such, in this embodiment, the first indoor heat exchanger 420 is composed of two heat exchangers (the first indoor heat exchanger 421 and the second indoor heat exchanger 425), so various heat exchangers depending on load conditions or environmental conditions. Control may be possible. For example, (i) cooling/dehumidification performance can be increased by driving both the first indoor heat exchanger 421 and the second indoor heat exchanger 425 (high load environment, first air conditioning mode, or third air conditioning mode) mode), (ii) cooling/dehumidifying performance may be implemented by operating only one of the first indoor heat exchanger 421 and the second indoor heat exchanger 425 (heavy load environment), (iii) the first indoor heat exchanger 425 The heat exchanger 421 may be driven as an evaporator and the second indoor heat exchanger 425 may be driven as a condenser to implement dehumidification and heating functions (low load environment, second air conditioning mode). In this way, by controlling the primary indoor heat exchanger 420 differently depending on load conditions or environmental conditions, the power consumption required to drive the air conditioner can be reduced.

상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 상기 실내덕트(S)의 내부에서 공기의 유동방향을 따라 서로 나란히 직렬배치될 수 있다. 이렇게 되면, 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 공기를 연속적으로 제어할 수 있다. 예를 들어, 상기 제1실내열교환기(421)와 제2실내열교환기(425)가 각각 증발기로 작동하면(제1공조모드 및 제3공조모드), 상기 제1실내열교환기(421)를 지나면서 1차로 냉각/제습된 공기는 상기 제2실내열교환기(425)를 거치면서 2차로 냉각/제습될 수 있다. 이때, 상기 제1실내열교환기(421)는 공기의 실내온도에 변화를 주는 현열부하(Sensible Heat Load)를 제거할 수 있고, 상기 제2실내열교환기(425)는 실내습도에 변화를 주는 잠열부하(Latent Heat Load)를 제거할 수 있다. The first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be arranged in series side by side along the air flow direction inside the indoor duct (S). In this way, the first indoor heat exchanger 421 and the second indoor heat exchanger 425 can continuously control air. For example, when the first indoor heat exchanger 421 and the second indoor heat exchanger 425 each operate as an evaporator (first air conditioning mode and third air conditioning mode), the first indoor heat exchanger 421 The air that is first cooled/dehumidified as it passes through can be cooled/dehumidified secondarily as it passes through the second indoor heat exchanger (425). At this time, the first indoor heat exchanger 421 can remove the sensible heat load that changes the indoor temperature of the air, and the second indoor heat exchanger 425 can remove the latent heat load that changes the indoor humidity. Latent heat load can be removed.

또는, 상기 제1실내열교환기(421)는 증발기로 작동하고, 상기 제2실내열교환기(425)는 응축기로 작동하면(제2공조모드), 상기 제1실내열교환기(421)를 지나면서 1차로 냉각/제습된 공기는 상기 제2실내열교환기(425)를 거치면서 가열되어 온도가 상승할 수 있다. Alternatively, when the first indoor heat exchanger 421 operates as an evaporator and the second indoor heat exchanger 425 operates as a condenser (second air conditioning mode), while passing through the first indoor heat exchanger 421, The initially cooled/dehumidified air may be heated while passing through the second indoor heat exchanger 425, thereby increasing its temperature.

이때, 상기 제1실내열교환기(421)는 제1실내기 연결관(L128) 및 제1-1실내열교환 연결관(L124)을 통해서 상기 제1회수열교환기(410)와 연결될 수 있다. 그리고, 상기 제1-1실내열교환 연결관(L124)에는 제1실내팽창변(423)이 배치될 수 있다. 상기 제1실내기 연결관(L128) 및 제1-1실내열교환 연결관(L124)은 액관을 구성할 수 있다. 상기 제1실내열교환기(421)는 제1열교환 유도관(L117)을 통해서 상기 제1전달모듈(500)의 제1냉매열교환기(530)에 연결될 수 있다. 상기 제1열교환 유도관(L117)은 제1저압관이 될 수 있다. At this time, the first indoor heat exchanger 421 may be connected to the first recovery heat exchanger 410 through the first indoor unit connection pipe (L128) and the 1-1 indoor heat exchange connection pipe (L124). Additionally, a first indoor expansion valve 423 may be disposed on the 1-1 indoor heat exchange connection pipe (L124). The first indoor unit connection pipe (L128) and the 1-1 indoor heat exchange connection pipe (L124) may form a liquid pipe. The first indoor heat exchanger 421 may be connected to the first refrigerant heat exchanger 530 of the first transfer module 500 through a first heat exchange guide pipe (L117). The first heat exchange guide pipe (L117) may be a first low pressure pipe.

만약 상기 제1실내열교환기(421)가 증발기로 작동하면(제1공조모드, 제2공조모드 및 제3공조모드), 상기 제1회수열교환기(410)에서 응축된 제1메인냉매가 제1실내기 연결관(L128)을 통해서 상기 제1실내팽창변(423)으로 전달되어 팽창된 후에, 상기 제1실내열교환기(421)로 전달되어 증발되고, 증발된 제1메인냉매는 상기 제1열교환 유도관(L117)을 통해서 제1냉매열교환기(530)로 전달될 수 있다. If the first indoor heat exchanger 421 operates as an evaporator (first air conditioning mode, second air conditioning mode, and third air conditioning mode), the first main refrigerant condensed in the first recovery heat exchanger 410 is 1 After being transferred to the first indoor expansion valve 423 through the indoor unit connection pipe (L128) and expanded, it is transferred to the first indoor heat exchanger 421 and evaporated, and the evaporated first main refrigerant is used in the first heat exchanger. It can be delivered to the first refrigerant heat exchanger (530) through the induction pipe (L117).

상기 제2실내열교환기(425)는 제1실내기 연결관(L128), 제1실내 분기관(L125) 및 제1-2실내열교환 연결관(L126)을 통해서 상기 제1회수열교환기(410)와 연결될 수 있다. 그리고, 상기 제1-2실내열교환 연결관(L126)에는 제2실내팽창변(427)이 배치될 수 있다. 또한, 상기 제2실내열교환기(425)는 제1-2열교환 연결관(L123)을 통해서는 상기 제1전달모듈(500)의 제1냉매열교환기(530)에 연결되어, 상기 제1실외열교환기(130)와도 연결될 수 있다. 상기 제2실내열교환기(425)는 제1-2분배 연결관(L119)을 통해서 상기 제1전달모듈(500)의 제1냉매분배밸브(510)에 연결될 수 있다.The second indoor heat exchanger (425) is connected to the first recovery heat exchanger (410) through the first indoor unit connection pipe (L128), the first indoor branch pipe (L125), and the 1-2 indoor heat exchange connection pipe (L126). can be connected with Additionally, a second indoor expansion valve 427 may be disposed on the first-second indoor heat exchange connection pipe L126. In addition, the second indoor heat exchanger 425 is connected to the first refrigerant heat exchanger 530 of the first transfer module 500 through the first-2 heat exchange connector L123, and is connected to the first outdoor heat exchanger 530 of the first transfer module 500. It may also be connected to the heat exchanger 130. The second indoor heat exchanger 425 may be connected to the first refrigerant distribution valve 510 of the first transfer module 500 through a first-2 distribution connector L119.

만약 상기 제2실내열교환기(425)가 증발기로 작동하면(제1공조모드 및 제3공조모드), 상기 제1회수열교환기(410)에서 응축된 제1메인냉매가 제1실내기 연결관(L128) 및 제1실내 분기관(L125)을 통해서 상기 제2실내팽창변(427)으로 전달되어 팽창된 후에, 상기 제2실내열교환기(425)로 전달되어 증발되고, 증발된 제1메인냉매는 상기 제1-2분배 연결관(L119)을 통해서 제1냉매분배밸브(510)로 전달될 수 있다. 동시에, 상기 제1실외열교환기(130)에서 응축된 제1메인냉매도 제1-2열교환 연결관(L123)을 통해서 상기 제2실내열교환기(425)로 전달되어 증발될 수 있다. 이때, 상기 제1-2열교환 연결관(L123), 상기 제1실내기 연결관(L128) 및 제1실내 분기관(L125)은 제1액관을 구성할 수 있고, 상기 제1-2분배 연결관(L119)은 제1저압관이 될 수 있다. If the second indoor heat exchanger 425 operates as an evaporator (first air conditioning mode and third air conditioning mode), the first main refrigerant condensed in the first recovery heat exchanger 410 flows into the first indoor unit connection pipe ( L128) and the first indoor branch pipe (L125) are transferred to the second indoor expansion valve 427 and expanded, then transferred to the second indoor heat exchanger 425 and evaporated. The evaporated first main refrigerant is It can be delivered to the first refrigerant distribution valve 510 through the 1-2 distribution connection pipe (L119). At the same time, the first main refrigerant condensed in the first outdoor heat exchanger 130 may also be transferred to the second indoor heat exchanger 425 through the first-2 heat exchange connection pipe (L123) and evaporated. At this time, the 1-2 heat exchange connector (L123), the first indoor unit connector (L128), and the first indoor branch pipe (L125) may constitute a first liquid pipe, and the 1-2 distribution connector (L119) can be the first low pressure pipe.

이와 달리, 만약 상기 제2실내열교환기(425)가 응축기로 작동하면(제2공조모드), 상기 제1실외압축기(110)에 전달되 고온/고압의 제1메인냉매는 상기 제1전달모듈(500)을 거쳐 상기 제1-2분배 연결관(L119)을 통해 상기 제2실내열교환기(425)로 전달될 수 있다. 상기 제2실내열교환기(425)에서 응축된 냉매 중 (i) 일부는 제1-2실내열교환 연결관(L126)-제1실내 분기관(L125)-제1-1실내열교환 연결관(L124)을 통해 상기 제1실내열교환기(421)로 전달되어 증발될 수 있고, (ii) 또 다른 일부는 제1-2실내열교환 연결관(L126)-제1실내 분기관(L125)-제1실내기 연결관(L128)을 거쳐 상기 제1회수열교환기(410)에 전달되어 증발될 수 있으며, (iii) 나머지는 제1-2실내열교환 연결관(L126)-제1-2열교환 연결관(L123)-제1냉매분배밸브(510)-제1-2실외기 연결관(L122)-제1-2실외열교환 연결관(L121)을 거쳐 상기 제1실외열교환기(130)에 전달되어 증발될 수 있다. In contrast, if the second indoor heat exchanger 425 operates as a condenser (second air conditioning mode), the high-temperature/high-pressure first main refrigerant delivered to the first outdoor compressor 110 is supplied to the first delivery module ( 500) and may be transmitted to the second indoor heat exchanger 425 through the first-second distribution connector (L119). Among the refrigerants condensed in the second indoor heat exchanger (425), (i) part is 1-2 indoor heat exchange connection pipe (L126) - 1st indoor branch pipe (L125) - 1-1 indoor heat exchange connection pipe (L124) ) can be transferred to the first indoor heat exchanger (421) and evaporated, and (ii) another part is 1-2 indoor heat exchange connection pipe (L126) - 1st indoor branch pipe (L125) - 1 It can be delivered to the first recovery heat exchanger (410) through the indoor unit connector (L128) and evaporated, and (iii) the remainder is 1-2 indoor heat exchange connector (L126) - 1-2 heat exchange connector ( L123) - first refrigerant distribution valve (510) - 1-2 outdoor unit connection pipe (L122) - 1-2 outdoor heat exchange connection pipe (L121) to be delivered to the first outdoor heat exchanger (130) and evaporated. You can.

이때, (i) 제1-2실내열교환 연결관(L126)-제1실내 분기관(L125)-제1-1실내열교환 연결관(L124), (ii) 제1-2실내열교환 연결관(L126)-제1실내 분기관(L125)-제1실내기 연결관(L128), (iii) 제1-2실내열교환 연결관(L126)-제1-2열교환 연결관(L123)-제1냉매분배밸브(510)-제1-2실외기 연결관(L122)-제1-2실외열교환 연결관(L121)은 각각 제1액관을 구성할 수 있다. At this time, (i) 1-2 indoor heat exchange connector (L126) - 1st indoor branch pipe (L125) - 1-1 indoor heat exchange connector (L124), (ii) 1-2 indoor heat exchange connector ( L126)-1st indoor branch pipe (L125)-1st indoor unit connection pipe (L128), (iii) 1-2 indoor heat exchange connection pipe (L126)-1-2 heat exchange connection pipe (L123)-1st refrigerant The distribution valve 510, the 1st-2nd outdoor unit connection pipe (L122), and the 1st-2nd outdoor heat exchange connection pipe (L121) may each form a first liquid pipe.

본 실시례에서 상기 제1실내열교환기(421)는 상기 제1전달모듈(500)의 제1냉매열교환기(530)로 직접 연결되지만, 상기 제2실내열교환기(425)는 상기 제1전달모듈(500)의 제1냉매분배밸브(510)를 거친 후에 상기 제1냉매열교환기(530)로 합류한다. 이처럼 제1메인냉매의 이동경로가 달라, 상기 제1실내열교환기(421)를 통한 냉매압속(refrigerant pressure drop)이 상기 제2실내열교환기(425)를 통한 냉매압손 보다 작을 수 있다. 그 결과, 상기 제1실내열교환기(421)에 의한 증발온도와 상기 제2실내열교환기(425)에 의한 증발온도는 다르게 제어될 수 있다. 이를 이용하여 상기 제어부(1000)는 이러한 온도차를 이용하여 공기조화기의 냉각/제습 기능을 보다 세밀하게 제어할 수 있다. In this embodiment, the first indoor heat exchanger 421 is directly connected to the first refrigerant heat exchanger 530 of the first transfer module 500, but the second indoor heat exchanger 425 is connected to the first refrigerant heat exchanger 530 of the first transfer module 500. After passing through the first refrigerant distribution valve 510 of the module 500, it joins the first refrigerant heat exchanger 530. As the movement path of the first main refrigerant is different, the refrigerant pressure drop through the first indoor heat exchanger (421) may be smaller than the refrigerant pressure drop through the second indoor heat exchanger (425). As a result, the evaporation temperature by the first indoor heat exchanger 421 and the evaporation temperature by the second indoor heat exchanger 425 can be controlled differently. Using this, the control unit 1000 can more precisely control the cooling/dehumidifying function of the air conditioner using this temperature difference.

상기 1차실내열교환기(420)인 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 상기 제1실외기(100), 상기 제1전달모듈(500) 및 상기 제1회수열교환기(410)와 함께 상기 제1공조유닛(U1)을 구성할 수 있다. 또한, 상기 복수의 실내열교환기들(420,430,435)과, 상기 실내덕트(S)의 제1배기구(G5)에 배치되는 상기 제1회수열교환기(410)를 하나의 제1열교환부로 볼 수도 있다. The first indoor heat exchanger 421 and the second indoor heat exchanger 425, which are the primary indoor heat exchanger 420, include the first outdoor unit 100, the first transfer module 500, and the first recovery unit. The first air conditioning unit (U1) can be formed together with the heat exchanger 410. Additionally, the plurality of indoor heat exchangers 420, 430, and 435 and the first recovery heat exchanger 410 disposed at the first exhaust port G5 of the indoor duct S may be viewed as one first heat exchange unit.

상기 실내기(400)에는 제2회수열교환기(440)가 배치될 수 있다. 상기 제2회수열교환기(440)는 상기 실내기(400)에 배치되어, 증발기(제1공조모드, 제2공조모드 및 제3공조모드)로 동작될 수 있다. 상기 제2회수열교환기(440)가 증발기로 동작되면, 상기 제2회수열교환기(440)의 제2메인냉매는 상기 실내기(400)에서 외부로 배출되는 배기(EA)로부터 흡열할 수 있다. 이때, 상기 배기(EA)는 외부의 공기 보다 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제2공조유닛(U2)에 의한 냉동사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. A second recovery heat exchanger 440 may be disposed in the indoor unit 400. The second recovery heat exchanger 440 may be disposed in the indoor unit 400 and operate as an evaporator (first air conditioning mode, second air conditioning mode, and third air conditioning mode). When the second recovery heat exchanger 440 operates as an evaporator, the second main refrigerant of the second recovery heat exchanger 440 can absorb heat from the exhaust EA discharged to the outside from the indoor unit 400. At this time, since the temperature of the exhaust EA is higher than that of the external air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the second air conditioning unit (U2) increases, thereby reducing power consumption.

결과적으로, 상기 제2회수열교환기(440)는 증발기로 동작될 때 배기(EA)의 온도를 활용하므로, 상기 제2공조유닛(U2)의 냉동사이클을 운전하는데 필요한 전력의 소모를 줄이는 기능을 할 수 있다. As a result, the second recovery heat exchanger (440) utilizes the temperature of the exhaust (EA) when operating as an evaporator, thereby reducing the power consumption required to operate the refrigeration cycle of the second air conditioning unit (U2). can do.

이를 위해서, 상기 제2회수열교환기(440)는 배기(EA)가 배출되는 제2배기구(G6)에 인접하게 배치될 수 있다. 달리 표현하면, 상기 제2회수열교환기(440)는 상기 제2회수열교환기(440)의 표면이 상기 제2배기구(G6)를 향하도록 상기 실내덕트(S) 내부에 배치될 수 있다. 도 1을 보면, 상기 제2회수열교환기(440)를 거친 배기(EA)는 제2배기구(G6)를 통해 외부 공간으로 배출될 수 있다. To this end, the second recovery heat exchanger 440 may be placed adjacent to the second exhaust port G6 through which the exhaust gas EA is discharged. In other words, the second recovery heat exchanger 440 may be disposed inside the indoor duct (S) such that the surface of the second recovery heat exchanger (440) faces the second exhaust port (G6). Referring to FIG. 1, the exhaust EA that has passed through the second recovery heat exchanger 440 may be discharged to the external space through the second exhaust port G6.

상기 실내덕트(S)에는 제1재생열교환기(450)가 배치될 수 있다. 상기 제1재생열교환기(450)는 응축기로 작동될 수 있다. 상기 제1재생열교환기(450)는 상기 제1열교환모듈(700)과 함께 제1재생냉매를 유동시키는 제1재생냉매사이클을 구성할 수 있다. 즉, 상기 제1열교환모듈(700)과 제1재생열교환기(450)는 상기 제2공조유닛(U2)의 내부에서 독립된 제1재생냉매를 운용함으로써, 상기 제2공조유닛(U2)은 고압 싸이클과 저압 싸이클을 병렬로 연결한 일종의 캐스캐이드 싸이클(Cascade cycle)이 될 수 있다. A first regenerative heat exchanger 450 may be placed in the indoor duct (S). The first regenerative heat exchanger 450 may operate as a condenser. The first regenerative heat exchanger 450, together with the first heat exchange module 700, may form a first regenerative refrigerant cycle that flows the first regenerative refrigerant. That is, the first heat exchange module 700 and the first regenerative heat exchanger 450 operate an independent first regenerative refrigerant inside the second air conditioning unit (U2), so that the second air conditioning unit (U2) operates under high pressure. It can be a type of cascade cycle that connects a cycle and a low-pressure cycle in parallel.

구체적으로 보면, 상기 제2실외기(200)와 상기 제2회수열교환기(440), 그리고 상기 제1열교환모듈(700)의 제1모듈열교환기(730)는 제2메인냉매사이클을 구성할 수 있다. 상기 제2메인냉매사이클에는 제2메인냉매가 유동할 수 있다. 상기 제2메인냉매는 제1재생냉매와 서로 상이한 종류의 냉매일 수 있다. 일례로, 상기 제2메인냉매는 R410A 냉매를 포함하고, 상기 제1재생냉매는 R134A 냉매를 포함할 수 있다.Specifically, the second outdoor unit 200, the second recovery heat exchanger 440, and the first module heat exchanger 730 of the first heat exchange module 700 may constitute a second main refrigerant cycle. there is. A second main refrigerant may flow in the second main refrigerant cycle. The second main refrigerant may be a different type of refrigerant from the first regenerated refrigerant. For example, the second main refrigerant may include R410A refrigerant, and the first regenerated refrigerant may include R134A refrigerant.

이때, 상기 제1열교환모듈(700)의 제1모듈열교환기(730)는 제2메인냉매의 응축기 및 제1재생냉매의 증발기로 동작될 수 있다. 상기 제1모듈열교환기(730)는 판형 열교환기(Plate Heat Exchangers)로 구성되어, 서로 다른 두 냉매를 독립된 경로로 통과시키면서, 두 냉매를 열교환시킬 수 있다. 즉, 상기 제1모듈열교환기(730)는 냉매 대 냉매의 열교환을 가능하게 할 수 있다. At this time, the first module heat exchanger 730 of the first heat exchange module 700 may operate as a condenser for the second main refrigerant and an evaporator for the first regenerated refrigerant. The first module heat exchanger 730 is composed of plate heat exchangers and can exchange heat between two different refrigerants while passing them through independent paths. That is, the first module heat exchanger 730 can enable heat exchange between refrigerants.

상기 제1열교환모듈(700)의 구조를 보면, 상기 제1열교환모듈(700)은 상기 제2전달모듈(600)과 상기 실내기(400)의 사이에 배치될 수 있다. 상기 제1열교환모듈(700)은 아래에서 설명될 제2열교환모듈(900)과 함께 열교환유닛(700,900)의 일부를 구성할 수 있다. 상기 열교환유닛(700,900)은 상기 실외유닛(100,200,300)과 마찬가지로 일종의 실외기로 볼 수 있고, 실외에 배치될 수 있다. Looking at the structure of the first heat exchange module 700, the first heat exchange module 700 may be disposed between the second transfer module 600 and the indoor unit 400. The first heat exchange module 700 may form part of the heat exchange units 700 and 900 together with the second heat exchange module 900, which will be described below. Like the outdoor units 100, 200, and 300, the heat exchange units 700 and 900 can be viewed as a type of outdoor unit and can be placed outdoors.

상기 제1열교환모듈(700)은 제1모듈압축기(710), 제1모듈어큐뮬레이터(720), 제1모듈열교환기(730), 제1모듈팽창변(740)을 포함할 수 있다. 상기 제1모듈팽창변(740)과 상기 제1모듈압축기(710)는 각각 상기 제1재생열교환기(450)에 연결될 수 있다. 상기 제1모듈열교환기(730)는 제2메인냉매의 응축기이자, 동시에 제1재생냉매의 증발기가 될 수 있다. 이는 앞서 설명한 바와 같이, 상기 제1모듈열교환기(730)가 판형 열교환기(Plate Heat Exchangers) 구조를 갖기 때문에 가능할 수 있다. 다른 예로는, 상기 제1모듈열교환기(730)는 판형 열교환기가 아니라, 이중관 타입의 열교환기가 될 수도 있다. The first heat exchange module 700 may include a first module compressor 710, a first module accumulator 720, a first module heat exchanger 730, and a first module expansion valve 740. The first module expansion valve 740 and the first module compressor 710 may each be connected to the first regenerative heat exchanger 450. The first module heat exchanger 730 can be a condenser for the second main refrigerant and an evaporator for the first regenerated refrigerant at the same time. As described above, this may be possible because the first module heat exchanger 730 has a plate heat exchanger structure. As another example, the first module heat exchanger 730 may be a double-tube type heat exchanger rather than a plate-type heat exchanger.

한편, 상기 제1재생열교환기(450)는 응축기로 작동하면서, 상기 제1재생열교환기(450)의 제1재생냉매는 상기 제습로터(460) 방향으로 전달되는 공기에 방열할 수 있다. 상기 제1재생열교환기(450)의 제1재생냉매의 방열에 의해 가열된 공기는 상기 제습로터(460)의 재생에 활용될 수 있고, 따라서 상기 제습로터(460)의 재생효율이 높아질 수 있다. 상기 제1재생열교환기(450)가 상기 제습로터(460)를 재생해줄 수 있으므로, 상기 제습로터(460)를 재생하기 위한 재생히터(465)를 가동하기 위한 소비전력이 줄어들 수 있다. Meanwhile, while the first regenerative heat exchanger 450 operates as a condenser, the first regenerative refrigerant of the first regenerative heat exchanger 450 can radiate heat to the air delivered toward the dehumidification rotor 460. Air heated by heat dissipation of the first regenerative refrigerant of the first regenerative heat exchanger 450 can be used for regeneration of the dehumidification rotor 460, and thus the regeneration efficiency of the dehumidification rotor 460 can be increased. . Since the first regenerative heat exchanger 450 can regenerate the dehumidifying rotor 460, power consumption for operating the regenerative heater 465 for regenerating the dehumidifying rotor 460 can be reduced.

특히, 본 실시례에서, 상기 제1재생냉매는 취출온도가 높은 냉매, 예를 들어 R134A 냉매를 포함할 수 있다. 이에 따라, 상기 제1재생열교환기(450)는 응축과정에서 80℃ 이상의 고온을 발생시킬 수 있고, 고온재생형 제습로터(460)를 재생시킬 수 있다. 상기 재생히터(465)는 효율이 매우 낮기 때문에, 상기 제1재생열교환기(450)를 이용하여 제습로터(460)를 재생시켜주면 공기조화기 전체의 에너지효율을 크게 높일 수 있다. In particular, in this embodiment, the first regenerated refrigerant may include a refrigerant with a high extraction temperature, for example, R134A refrigerant. Accordingly, the first regenerative heat exchanger 450 can generate a high temperature of 80°C or more during the condensation process and regenerate the high-temperature regenerative dehumidification rotor 460. Since the efficiency of the regenerative heater 465 is very low, the energy efficiency of the entire air conditioner can be greatly increased by regenerating the dehumidification rotor 460 using the first regenerative heat exchanger 450.

상기 실내덕트(S)에는 제습로터(460)와 재생히터(465)가 배치될 수 있다. 상기 제습로터(460)는 상기 제1실내열교환기(421), 제2실내열교환기(425), 제3실내열교환기(430) 및 제4실내열교환기(435)와는 독립적으로 공기를 제습할 수 있다. 상기 제습로터(460)는 일반적으로 사용되는 흡착식 제습장치(Desiccant dehumidifier)로 구성될 수 있다. 보다 정확하게는, 상기 제습로터(460)와 상기 재생히터(465)를 하나의 제습장치로 볼 수도 있다. 이 경우 상기 제습로터(460)는 처리부가 되고, 상기 재생히터(465)는 재생부가 된다. A dehumidifying rotor 460 and a regenerative heater 465 may be disposed in the indoor duct (S). The dehumidifying rotor 460 dehumidifies air independently of the first indoor heat exchanger 421, the second indoor heat exchanger 425, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435. You can. The dehumidifying rotor 460 may be configured as a commonly used adsorption dehumidifier (desiccant dehumidifier). More precisely, the dehumidifying rotor 460 and the regenerative heater 465 may be viewed as one dehumidifying device. In this case, the dehumidifying rotor 460 becomes a processing unit, and the regeneration heater 465 becomes a regeneration unit.

상기 제습로터(460)는 링형구조일 수 있다. 상기 제습로터(460)는 상기 실내덕트(S)를 원형으로 둘러 배치될 수 있다. 도 1에는 상기 제습로터(460)가 상기 실내기(400)를 가로지르는 것처럼 도시되었으나, 상기 제습로터(460)는 상기 실내기(400)의 내부, 즉 상기 실내덕트(S)의 내부를 원형으로 둘러 배치될 수 있는 것이다. The dehumidifying rotor 460 may have a ring-shaped structure. The dehumidifying rotor 460 may be arranged to surround the indoor duct (S) in a circle. In FIG. 1, the dehumidification rotor 460 is shown as crossing the indoor unit 400, but the dehumidification rotor 460 surrounds the inside of the indoor unit 400, that is, the inside of the indoor duct (S) in a circle. It can be deployed.

본 실시례에서 상기 제습로터(460)는 상기 제1재생열교환기(450)와 상기 제2회수열교환기(440)의 사이에 배치될 수 있다. 상기 제1재생열교환기(450)는 응축기로 사용되면서 상기 제1재생열교환기(450)의 냉매는 상기 제습로터(460) 방향으로 방열하여 제습로터(460)를 재생할 수 있다. In this embodiment, the dehumidification rotor 460 may be disposed between the first regenerative heat exchanger 450 and the second recovery heat exchanger 440. The first regenerative heat exchanger 450 is used as a condenser, and the refrigerant in the first regenerative heat exchanger 450 radiates heat in the direction of the dehumidification rotor 460 to regenerate the dehumidification rotor 460.

상기 제2회수열교환기(440)는 증발기로 동작될 때 제2회수열교환기(440)의 냉매는 상기 제습로터(460)에 의해 가열된 매우 고온의 배기(EA)로부터 흡열할 수 있다. 따라서 상기 제2회수열교환기(440)의 증발효율이 높아지고, 상기 제2공조유닛(U2) 전체의 냉각효율이 향상되는 효과가 있다. When the second recovery heat exchanger 440 is operated as an evaporator, the refrigerant in the second recovery heat exchanger 440 can absorb heat from the very high temperature exhaust air (EA) heated by the dehumidification rotor 460. Accordingly, the evaporation efficiency of the second recovery heat exchanger 440 is increased, and the cooling efficiency of the entire second air conditioning unit (U2) is improved.

상기 제2회수열교환기(440)는 상기 제습로터(460)와 상기 제2배기구(G6)의 사이에 배치될 수 있다. 이렇게 되면, 상기 제습로터(460)를 통해 가열된 공기는 상기 제2배기구(G6)로 배출되는 배기(EA)가 되고, 이러한 배기(EA)를 이용하여 상기 제2회수열교환기(440)의 증발효율이 높아질 수 있는 것이다. The second recovery heat exchanger 440 may be disposed between the dehumidification rotor 460 and the second exhaust port (G6). In this case, the air heated through the dehumidifying rotor 460 becomes exhaust gas (EA) discharged to the second exhaust port (G6), and this exhaust gas (EA) is used to heat the second recovery heat exchanger (440). Evaporation efficiency can be increased.

도시되지는 않았으나, 상기 공기조화기에는 복수의 온도/습도센서가 배치될 수 있다. 예를 들어, 상기 환기구(G4), 상기 제1외기구(G1) 및 제2외기구(G2), 상기 제습로터(460)의 입구측 및 상기 제2실내열교환기(425)의 출구측에 각각 온도/습도센서가 배치될 수 있다. 상기 제어부(1000)는 상기 온도/습도센서를 통해 얻은 온도 및 습도 정보를 기초로 각 구성요소들을 제어할 수 있다. Although not shown, a plurality of temperature/humidity sensors may be disposed in the air conditioner. For example, at the ventilation port (G4), the first external device (G1) and the second external device (G2), the inlet side of the dehumidifying rotor 460, and the outlet side of the second indoor heat exchanger 425. A temperature/humidity sensor may be placed respectively. The control unit 1000 can control each component based on temperature and humidity information obtained through the temperature/humidity sensor.

상기 실내덕트(S)에는 제2바이패스(B2)가 배치될 수 있다. 상기 제2바이패스(B2)는 상기 제3공조유닛(U3) 측에 배치될 수 있다. 상기 제2바이패스(B2)는 상기 실내덕트(S) 내부에 형성된 경로의 일부로 볼 수 있다. 상기 제2바이패스(B2)에는 공기의 유동을 위한 송풍팬이 포함될 수 있다. A second bypass (B2) may be disposed in the indoor duct (S). The second bypass (B2) may be disposed on the third air conditioning unit (U3). The second bypass (B2) can be viewed as part of a path formed inside the indoor duct (S). The second bypass B2 may include a blowing fan for air flow.

상기 제2바이패스(B2)는 (i) 상기 제1실내열교환기(421)와 제2실내열교환기(425) 및 상기 제습로터(460)를 거친 공기가 제3실내열교환기(430)와 제4실내열교환기(435)를 거쳐 급기(SA)가 되어 급기구(G3)로 이동하는 경로와, (ii) 상기 제2외기구(G2)를 통해 유입된 외기(OA)가 상기 제2재생열교환기(470)를 향하는 경로를 서로 이어줄 수 있다. 따라서, 상기 제습로터(460)를 거친 공기의 일부는 상기 제4실내열교환기(435)를 통과하면서 급기(SA)가 되어 상기 급기구(G3)를 통해 실내공간으로 급기되고, 나머지 일부는 상기 제2바이패스(B2)를 통해 이동할 수 있다. 상기 제2바이패스(B2)를 통해 이동한 공기는 상기 제2외기구(G2)를 통해 유입된 외기(OA)와 혼합되어 상기 제2재생열교환기(470)로 유동될 수 있다. The second bypass (B2) (i) allows air that has passed through the first indoor heat exchanger (421), the second indoor heat exchanger (425), and the dehumidifying rotor (460) to be transferred to the third indoor heat exchanger (430). a path through which the fourth indoor heat exchanger (435) becomes supply air (SA) and moves to the supply opening (G3); (ii) the outside air (OA) flowing in through the second external device (G2) is connected to the second outside air (OA); The paths toward the regenerative heat exchanger 470 can be connected to each other. Accordingly, a part of the air that has passed through the dehumidifying rotor 460 becomes supply air (SA) while passing through the fourth indoor heat exchanger 435 and is supplied to the indoor space through the air supply opening G3, and the remaining part is supplied to the indoor space through the air supply opening G3. It can be moved through the second bypass (B2). The air moving through the second bypass (B2) may be mixed with the outside air (OA) introduced through the second outside mechanism (G2) and flow into the second regenerative heat exchanger (470).

이처럼, 본 실시례에서 상기 제습로터(460)를 거친 공기는 모두 급기(SA)가 되어 상기 급기구(G3)로 공급되지 않고, 일부가 상기 제2바이패스(B2)를 통해 다시 활용될 수 있다. 하절기를 예로 들면, 상기 제습로터(460)를 거친 공기의 온도는 외부에서 공급되는 외기(OA)의 온도 보다 낮다. 따라서, 상기 제2바이패스(B2)를 통해 이동하는 공기는 외기(OA)와 섞이면서 공기의 온도를 낮출 수 있고, 제3공조유닛(U3)의 구동효율을 높여줄 수 있다. As such, in this embodiment, all of the air that has passed through the dehumidifying rotor 460 becomes supply air (SA) and is not supplied to the supply opening (G3), and some of it can be reused through the second bypass (B2). there is. Taking the summer season as an example, the temperature of the air passing through the dehumidifying rotor 460 is lower than the temperature of external air (OA) supplied from the outside. Accordingly, the air moving through the second bypass (B2) mixes with the outside air (OA), thereby lowering the temperature of the air and increasing the driving efficiency of the third air conditioning unit (U3).

상기 제2바이패스(B2)를 기준으로, 상기 제2재생열교환기(470)의 반대편에는 상기 제3실내열교환기(430)와 제4실내열교환기(435)가 배치될 수 있다. 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 상기 제습로터(460)를 거친 공기를 냉각 및 제습할 수 있다. Based on the second bypass B2, the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be disposed on the opposite side of the second regenerative heat exchanger 470. The third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 can cool and dehumidify the air that has passed through the dehumidification rotor 460.

상기 제3실내열교환기(430)와 제4실내열교환기(435)는 상기 1차실내열교환기(420)와 이격되어, 2차실내열교환기를 구성할 수 있다. 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 상기 제3실외기(300), 상기 제3전달모듈(800), 제2열교환모듈(900) 및 제2재생열교환기(470)와 함께 제3공조유닛(U3)을 구성할 수 있다. The third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be spaced apart from the primary indoor heat exchanger 420 to form a secondary indoor heat exchanger. The third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 include the third outdoor unit 300, the third transfer module 800, the second heat exchange module 900, and the second regenerative heat exchanger ( Together with 470), a third air conditioning unit (U3) can be formed.

상기 제3실내열교환기(430)와 제4실내열교환기(435)는 증발기로 동작될 수 있다. 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 증발기로 동작하면서 외기(OA) 또는 환기(RA)를 냉각/제습할 수 있다. 앞서 상기 제1실내열교환기(421)와 제2실내열교환기(425)에 의해 냉각/제습된 공기가 제3실내열교환기(430)와 제4실내열교환기(435)에 의해 추가로 냉각/제습되면, 실내공간의 습도를 크게 낮출 수 있다. 또한, 아래에서 설명될 제습로터(460)도 상기 제1실내열교환기(421), 제2실내열교환기(425), 제3실내열교환기(430) 및 제4실내열교환기(435)와 함께 외기(OA) 또는 환기(RA)를 제습하므로, 공기조화기의 제습성능이 높아질 수 있다. The third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be operated as evaporators. The third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 can cool/dehumidify outdoor air (OA) or ventilation (RA) while operating as an evaporator. The air previously cooled/dehumidified by the first indoor heat exchanger (421) and the second indoor heat exchanger (425) is further cooled/dehumidified by the third indoor heat exchanger (430) and the fourth indoor heat exchanger (435). When dehumidified, the humidity in indoor space can be greatly reduced. In addition, the dehumidifying rotor 460, which will be described below, is also used together with the first indoor heat exchanger 421, the second indoor heat exchanger 425, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435. By dehumidifying outside air (OA) or ventilation (RA), the dehumidification performance of the air conditioner can be increased.

상기 제3실내열교환기(430)는 제3열교환 전달관(L317)을 통해 상기 제3전달모듈(800)에 연결될 수 있다. 상기 제4실내열교환기(435)는 제4열교환전달관(L324)을 통해 상기 제3전달모듈(800)에 연결될 수 있다. The third indoor heat exchanger 430 may be connected to the third transfer module 800 through a third heat exchange transfer pipe (L317). The fourth indoor heat exchanger 435 may be connected to the third transfer module 800 through a fourth heat exchange transfer pipe (L324).

구체적으로 보면, 상기 제3실내열교환기(430)는 제3열교환 전달관(L317) 및 제3열교환 연결관(L316)을 통해서 상기 제3전달모듈(800)의 제3냉매열교환기(830)에 연결될 수 있다. 이때, 상기 제3열교환 전달관(L317) 및 제3열교환 연결관(L316)은 제3저압관이 될 수 있다. 즉, 상기 제3실내열교환기(430)가 증발기로 동작될 때, 상기 제3실내열교환기(430)에서 배출된 저온/저압의 제3메인냉매는 상기 제3열교환 전달관(L317) 및 제3열교환 연결관(L316)을 통해 상기 제3냉매열교환기(830)로 유동하고, 제3냉매열교환기(830)는 제3메인냉매를 상기 제3실외기(300)로 안내할 수 있다. Specifically, the third indoor heat exchanger (430) is the third refrigerant heat exchanger (830) of the third transfer module (800) through the third heat exchange transfer pipe (L317) and the third heat exchange connector (L316). can be connected to At this time, the third heat exchange transmission pipe (L317) and the third heat exchange connection pipe (L316) may be the third low pressure pipe. That is, when the third indoor heat exchanger (430) is operated as an evaporator, the low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger (430) is transferred to the third heat exchange transfer pipe (L317) and the third heat exchanger (L317). It flows to the third refrigerant heat exchanger 830 through the third heat exchange connection pipe L316, and the third refrigerant heat exchanger 830 can guide the third main refrigerant to the third outdoor unit 300.

상기 제4실내열교환기(435)는 제3-2분배 연결관(L319)을 통해서 상기 제3전달모듈(800)의 제3냉매열교환기(830)에 연결될 수 있다. 상기 제4실내열교환기(435)는 상기 제4열교환전달관(L324)을 통해서는 상기 제2모듈열교환기(930)에 연결될 수 있다. 상기 제4실내열교환기(435)가 증발기로 동작될 때, 상기 제4열교환전달관(L324)은 상기 제3실외열교환기(330)에서 응축된 중온/고압의 제3메인냉매를 상기 제4실내열교환기(435)에 전달하여 증발시킬 수 있다. 상기 제4실내열교환기(435)에서 배출된 저온/저압의 제3메인냉매는 제3-2분배 연결관(L319)을 통해서 상기 제3냉매분배밸브(810)를 거쳐 상기 제3냉매열교환기(830)로 유동하고, 제3메인냉매는 제3냉매열교환기(830)를 거쳐 상기 제3실외기(300)로 안내될 수 있다. 따라서, 상기 제4열교환전달관(L324)은 제3액관을 구성할 수 있고, 제3-2분배 연결관(L319)은 제3저압관을 구성할 수 있다. The fourth indoor heat exchanger 435 may be connected to the third refrigerant heat exchanger 830 of the third transfer module 800 through the 3-2 distribution connector L319. The fourth indoor heat exchanger 435 may be connected to the second module heat exchanger 930 through the fourth heat exchange transfer pipe L324. When the fourth indoor heat exchanger (435) is operated as an evaporator, the fourth heat exchange transfer pipe (L324) transfers the medium-temperature/high-pressure third main refrigerant condensed in the third outdoor heat exchanger (330) to the fourth heat exchanger (L324). It can be evaporated by passing it to the indoor heat exchanger (435). The low-temperature/low-pressure third main refrigerant discharged from the fourth indoor heat exchanger (435) passes through the third refrigerant distribution valve (810) through the 3-2 distribution connector (L319) to the third refrigerant heat exchanger. It flows to (830), and the third main refrigerant may be guided to the third outdoor unit (300) through the third refrigerant heat exchanger (830). Accordingly, the fourth heat exchange transfer pipe (L324) may constitute a third liquid pipe, and the 3-2 distribution connection pipe (L319) may constitute a third low pressure pipe.

이때, 상기 제3실내열교환기(430) 및 제4실내열교환기(435)는 추가실내열교환기가 되고, 상기 추가실내열교환기는 상기 제2재생열교환기(470)와 함께 하나의 제2열교환부를 구성한다고 볼 수도 있다. At this time, the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 become additional indoor heat exchangers, and the additional indoor heat exchanger forms a second heat exchange unit together with the second regenerative heat exchanger 470. It can be seen that it does.

상기 제2재생열교환기(470)는 응축기로 동작될 수 있고, 상기 제2재생열교환기(470)는 제2열교환모듈(900)과 함께 제2재생냉매를 유동시킬 수 있다. 상기 제2재생열교환기(470)는 제2재생열교환 연결관(347)을 통해서 상기 제2열교환모듈(900)의 제2모듈열교환기(930)에 연결될 수 있다. The second regenerative heat exchanger 470 may operate as a condenser, and the second regenerative heat exchanger 470 may flow the second regenerative refrigerant together with the second heat exchange module 900. The second regenerative heat exchanger 470 may be connected to the second module heat exchanger 930 of the second heat exchange module 900 through a second regenerative heat exchange connector 347.

상기 제2재생열교환기(470)는 상기 제2열교환모듈(900)과 함께 제2재생냉매를 유동시키는 제2재생냉매사이클을 구성할 수 있다. 즉, 상기 제2열교환모듈(900)과 제2재생열교환기(470)는 상기 제3공조유닛(U3)의 내부에서 독립된 제2재생냉매를 운용함으로써, 상기 제3공조유닛(U3)은 고압 싸이클과 저압 싸이클을 병렬로 연결한 일종의 캐스캐이드 싸이클(Cascade cycle)이 될 수 있다. The second regenerative heat exchanger 470, together with the second heat exchange module 900, may form a second regenerative refrigerant cycle that flows the second regenerative refrigerant. That is, the second heat exchange module 900 and the second regenerative heat exchanger 470 operate an independent second regenerative refrigerant inside the third air conditioning unit (U3), so that the third air conditioning unit (U3) operates under high pressure. It can be a type of cascade cycle that connects a cycle and a low-pressure cycle in parallel.

구체적으로 보면, 상기 제3실외기(300)와 상기 제3실내열교환기(430) 및 제4실내열교환기(435), 그리고 상기 제2열교환모듈(900)의 제2모듈열교환기(930)는 제3메인냉매사이클을 구성할 수 있다. 상기 제3메인냉매사이클에는 제3메인냉매가 유동할 수 있다. 상기 제3메인냉매는 제2재생냉매와 서로 상이한 종류의 냉매일 수 있다. 일례로, 상기 제3메인냉매는 R410A 냉매를 포함하고, 상기 제2재생냉매는 R134A 냉매를 포함할 수 있다.Specifically, the third outdoor unit 300, the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the second module heat exchanger 930 of the second heat exchange module 900 are A third main refrigerant cycle can be configured. A third main refrigerant may flow in the third main refrigerant cycle. The third main refrigerant may be a different type of refrigerant from the second regenerated refrigerant. For example, the third main refrigerant may include R410A refrigerant, and the second regenerative refrigerant may include R134A refrigerant.

이때, 상기 제2열교환모듈(900)의 제2모듈열교환기(930)는 제3메인냉매의 응축기 및 제2재생냉매의 증발기로 동작될 수 있다. 상기 제2모듈열교환기(930)는 판형 열교환기(Plate Heat Exchangers)로 구성되어, 서로 다른 두 냉매를 독립된 경로로 통과시키면서, 두 냉매를 열교환시킬 수 있다. 즉, 상기 제2모듈열교환기(930)는 냉매 대 냉매의 열교환을 가능하게 할 수 있다. At this time, the second module heat exchanger 930 of the second heat exchange module 900 may operate as a condenser for the third main refrigerant and an evaporator for the second regenerated refrigerant. The second module heat exchanger 930 is composed of plate heat exchangers and can exchange heat between two different refrigerants while passing them through independent paths. That is, the second module heat exchanger 930 can enable heat exchange between refrigerants.

상기 제2열교환모듈(900)의 구조를 보면, 상기 제2열교환모듈(900)은 상기 제3전달모듈(800)과 상기 실내기(400)의 사이에 배치될 수 있다. 상기 제2열교환모듈(900)은 상기 제1열교환모듈(700)과 함께 열교환유닛(700,900)의 일부를 구성할 수 있다. 상기 열교환유닛(700,900)은 상기 실외유닛(100,200,300)과 마찬가지로 일종의 실외기로 볼 수 있고, 실외에 배치될 수 있다. Looking at the structure of the second heat exchange module 900, the second heat exchange module 900 may be disposed between the third transfer module 800 and the indoor unit 400. The second heat exchange module 900 may form part of the heat exchange units 700 and 900 together with the first heat exchange module 700. Like the outdoor units 100, 200, and 300, the heat exchange units 700 and 900 can be viewed as a type of outdoor unit and can be placed outdoors.

상기 제2열교환모듈(900)은 제2모듈압축기(910), 제2모듈어큐뮬레이터(920), 제2모듈열교환기(930), 제2모듈팽창변(940)을 포함할 수 있다. 상기 제2모듈팽창변(940)과 상기 제2모듈압축기(910)는 각각 상기 제2재생열교환기(470)에 연결될 수 있다. 상기 제2모듈열교환기(930)는 제3메인냉매의 응축기이자, 동시에 제2재생냉매의 증발기가 될 수 있다. 이는 앞서 설명한 바와 같이, 상기 제2모듈열교환기(930)가 판형 열교환기(Plate Heat Exchangers) 구조를 갖기 때문에 가능할 수 있다. 다른 예로는, 상기 제2모듈열교환기(930)는 판형 열교환기가 아니라, 이중관 타입의 열교환기가 될 수도 있다. The second heat exchange module 900 may include a second module compressor 910, a second module accumulator 920, a second module heat exchanger 930, and a second module expansion valve 940. The second module expansion valve 940 and the second module compressor 910 may each be connected to the second regenerative heat exchanger 470. The second module heat exchanger 930 can be a condenser for the third main refrigerant and at the same time an evaporator for the second regenerated refrigerant. As described above, this may be possible because the second module heat exchanger 930 has a plate heat exchanger structure. As another example, the second module heat exchanger 930 may be a double pipe type heat exchanger rather than a plate heat exchanger.

한편, 상기 제2재생열교환기(470)는 응축기로 작동하면서, 상기 제2재생열교환기(470)의 제2재생냉매는 상기 제습로터(460) 방향(도 1의 K3 방향)으로 전달되는 공기에 방열할 수 있다. 상기 제2재생열교환기(470)을 유동하는 제2재생냉매의 방열에 의해 가열된 공기는 상기 제습로터(460)의 재생에 활용될 수 있고, 따라서 상기 제습로터(460)의 재생효율이 높아질 수 있다. 상기 제2재생열교환기(470)가 상기 제습로터(460)를 재생해줄 수 있으므로, 상기 제습로터(460)를 재생하기 위한 재생히터(465)를 가동하기 위한 소비전력이 줄어들 수 있다. Meanwhile, the second regenerative heat exchanger 470 operates as a condenser, and the second regenerative refrigerant of the second regenerative heat exchanger 470 is supplied to the air delivered in the direction of the dehumidification rotor 460 (direction K3 in FIG. 1). Can dissipate heat. Air heated by heat dissipation of the second regenerative refrigerant flowing through the second regenerative heat exchanger 470 can be used for regeneration of the dehumidification rotor 460, thereby increasing the regeneration efficiency of the dehumidification rotor 460. You can. Since the second regenerative heat exchanger 470 can regenerate the dehumidifying rotor 460, power consumption for operating the regenerative heater 465 for regenerating the dehumidifying rotor 460 can be reduced.

다음으로, 도 3을 참고하여 본 실시례에 의한 공기조화기의 제어방법을 설명하기로 한다. 먼저 제어가 시작되면(S100), 운전모드가 선택될 수 있다(S200). 여기서 운전모드란, 상기 공기조화기가 설치된 장소의 조건에 따라 달라질 수 있다. 예를 들어, 설치장소의 온도, 습도, 내부체적 등의 조건에 따라 상기 운전모드가 선택될 수 있다. Next, the control method of the air conditioner according to this embodiment will be described with reference to FIG. 3. First, when control starts (S100), an operation mode can be selected (S200). Here, the operating mode may vary depending on the conditions of the location where the air conditioner is installed. For example, the operation mode may be selected depending on conditions such as temperature, humidity, and internal volume of the installation location.

본 실시례에서 상기 운전모드는 제1공조모드(S310), 제2공조모드(S320) 및 제3공조모드(S330)로 구성될 수 있다. 상기 제1공조모드, 제2공조모드 또는 제3공조모드는 서로 다른 조건에서 자동으로 선택될 수 있다. 예를 들어, 외부의 기온에 따라 상기 제1공조모드, 제2공조모드 또는 제3공조모드가 선택될 수 있다. 상기 제1공조모드는 27℃ 이상(T1)에서 선택되고, 상기 제2공조모드는 15℃ 이하(T2)에서 선택되며, 상기 제3공조모드는 15℃-27℃(T3)에서 선택될 수 있다. 이것은 하나의 예시이며, 상기 온도조건은 사용자의 선택 또는 환경에 따라 달라질 수 있다. 또는 상기 온도조건을 대신하여 습도조건이 상기 운전모드를 선택하는 기준이 될 수도 있다. In this embodiment, the operation mode may be comprised of a first air conditioning mode (S310), a second air conditioning mode (S320), and a third air conditioning mode (S330). The first air conditioning mode, second air conditioning mode, or third air conditioning mode can be automatically selected under different conditions. For example, the first air conditioning mode, the second air conditioning mode, or the third air conditioning mode may be selected depending on the external temperature. The first air conditioning mode can be selected at 27℃ or higher (T1), the second air conditioning mode can be selected at 15℃ or lower (T2), and the third air conditioning mode can be selected at 15℃-27℃ (T3). there is. This is just one example, and the temperature conditions may vary depending on the user's choice or environment. Alternatively, humidity conditions may be used as a standard for selecting the operation mode instead of the temperature conditions.

먼저 상기 제1공조모드가 선택되면(S310), 상기 제1공조유닛(U1), 상기 제2공조유닛(U2), 제3공조유닛(U3)을 구성하는 구성요소의 동작이 제어될 수 있다(S410). 구체적으로는, 상기 제1실외압축기(110)와 제2실외압축기(210) 및 제3실외압축기(310)가 동작된다. 그리고 상기 제1회수열교환기(410), 상기 제1재생열교환기(450), 제2재생열교환기(470), 상기 제1실외열교환기(130), 상기 제2실외열교환기(230), 제1모듈열교환기(730) 및 제2모듈열교환기(930)는 각각 응축기로 동작될 수 있다. 상기 제1실내열교환기(421), 상기 제2실내열교환기(425), 상기 제3실내열교환기(430) 및 제4실내열교환기(435), 그리고 제2회수열교환기(440), 제1모듈열교환기(730) 및 제2모듈열교환기(930)는 각각 증발기로 동작될 수 있다. First, when the first air conditioning mode is selected (S310), the operation of the components constituting the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) can be controlled. (S410). Specifically, the first outdoor compressor 110, the second outdoor compressor 210, and the third outdoor compressor 310 are operated. And the first recovery heat exchanger 410, the first regenerative heat exchanger 450, the second regenerative heat exchanger 470, the first outdoor heat exchanger 130, the second outdoor heat exchanger 230, The first module heat exchanger 730 and the second module heat exchanger 930 may each be operated as a condenser. The first indoor heat exchanger (421), the second indoor heat exchanger (425), the third indoor heat exchanger (430), the fourth indoor heat exchanger (435), and the second recovery heat exchanger (440), The first module heat exchanger 730 and the second module heat exchanger 930 may each be operated as an evaporator.

이처럼 각 구성요소가 응축기 또는 증발기로 동작되는 것은, 상기 제어부(1000)에 의해 제어될 수 있다. 상기 제어부(1000)는 상기 제1메인실외밸브(150), 상기 제1서브실외밸브(160), 상기 제2메인실외밸브(250), 상기 제2서브실외밸브(260), 상기 제3메인실외밸브(350), 상기 제3서브실외밸브(360), 상기 제1전달모듈(500), 상기 제2전달모듈(600), 상기 제3전달모듈(800)을 제어하여, 상기 제1공조유닛(U1), 상기 제2공조유닛(U2) 및 제3공조유닛(U3)의 냉매흐름을 제어할 수 있다. 그리고 상기 냉매흐름이 제어되면, 상기 각 구성요소가 응축기 또는 증발기로 동작되도록 할 수 있다. In this way, the operation of each component as a condenser or evaporator can be controlled by the control unit 1000. The control unit 1000 includes the first main outdoor valve 150, the first sub-outdoor valve 160, the second main outdoor valve 250, the second sub-outdoor valve 260, and the third main valve. By controlling the outdoor valve 350, the third sub-outdoor valve 360, the first transmission module 500, the second transmission module 600, and the third transmission module 800, the first air conditioning The refrigerant flow in the unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U3) can be controlled. And when the refrigerant flow is controlled, each component can be operated as a condenser or evaporator.

보다 구체적으로는, 상기 제어부(1000)는 (i) 상기 제1메인실외밸브(150), 상기 제1서브실외밸브(160), 상기 제2메인실외밸브(250), 상기 제2서브실외밸브(260), 상기 제3메인실외밸브(350), 상기 제3서브실외밸브(360), 상기 제1전달모듈(500), 상기 제2전달모듈(600), 상기 제3전달모듈(800)을 제어하여 제1메인냉매, 제2메인냉매 및 제3메인냉매의 흐름을 제어할 수 있고, 동시에 (ii) 상기 제1열교환모듈(700)과 제2열교환모듈(900)을 각각 제어하여 제1재생냉매와 제2재생냉매의 흐름을 제어할 수 있다. More specifically, the control unit 1000 controls (i) the first main outdoor valve 150, the first sub-outdoor valve 160, the second main outdoor valve 250, and the second sub-outdoor valve. (260), the third main outdoor valve 350, the third sub-outdoor valve 360, the first delivery module 500, the second delivery module 600, and the third delivery module 800. The flows of the first main refrigerant, the second main refrigerant, and the third main refrigerant can be controlled by controlling (ii) the first heat exchange module 700 and the second heat exchange module 900, respectively. The flow of the first regenerated refrigerant and the second regenerated refrigerant can be controlled.

이하에서는 도 4 내지 도 7을 참고하여 제1공조모드를 설명한다. 도 4 내지 도 7에는 상기 제1공조모드일 때 냉매의 흐름이 도시되어 있다. 상기 제1공조모드는 제습과 함께, 실내온도를 낮추기 위한 공기의 냉각기능도 할 수 있다. Hereinafter, the first air conditioning mode will be described with reference to FIGS. 4 to 7. 4 to 7 show the flow of refrigerant in the first air conditioning mode. The first air conditioning mode can perform a dehumidifying and air cooling function to lower the indoor temperature.

이 중에서, 도 4에는 제1공조모드일 때, 메인냉매유동과 재생냉매유동이 화살표로 표시되어 있다. 도 5에는 제1공조유닛(U1)에서 제1메인냉매유동이 순서도 형태로 도시되어 있으며, 도 6에는 제2공조유닛(U2)에서 제2재생냉매유동과 제1재생냉매유동이 순서도 형태로 도시되어 있으며, 도 7에는 제3공조유닛(U3)에서 제3매안냉매유동과 제2재생냉매유동이 순서도 형태로 도시되어 있다. Among these, in Figure 4, when in the first air conditioning mode, the main refrigerant flow and the regenerative refrigerant flow are indicated by arrows. In Figure 5, the first main refrigerant flow in the first air conditioning unit (U1) is shown in the form of a flowchart, and in Figure 6, the second regenerative refrigerant flow and the first regenerative refrigerant flow in the second air conditioning unit (U2) are shown in the form of a flowchart. 7, the third refrigerant flow and the second regenerated refrigerant flow in the third air conditioning unit (U3) are shown in the form of a flowchart.

먼저 도 4와 도 5를 참조하여 제1공조모드일 때 상기 제1공조유닛(U1)에서 제1메인냉매의 흐름을 보면, 상기 제1실외압축기(110)가 제1메인냉매를 압축하여, 고온/고압의 냉매를 제1압축기 토출관(L101)으로 토출한다. 토출된 고온/고압의 제1메인냉매 중 일부는 상기 제1회수열교환기(410)로 전달되고, 나머지 일부는 상기 제1실외열교환기(130)로 전달된다. 즉, 상기 제1회수열교환기(410)와 상기 제1실외열교환기(130)가 각각 응축기로 사용될 수 있다. First, looking at the flow of the first main refrigerant in the first air conditioning unit (U1) in the first air conditioning mode with reference to FIGS. 4 and 5, the first outdoor compressor 110 compresses the first main refrigerant, High-temperature/high-pressure refrigerant is discharged through the first compressor discharge pipe (L101). Some of the discharged high-temperature/high-pressure first main refrigerant is transferred to the first recovery heat exchanger (410), and the remaining part is transferred to the first outdoor heat exchanger (130). That is, the first recovery heat exchanger 410 and the first outdoor heat exchanger 130 can each be used as a condenser.

이때, 상기 제1회수열교환기(410)로 제1메인냉매가 흐르는 경로는 제1고압관이 될 수 있다. 여기서 제1고압관은 상기 제1압축기 토출관(L101)-제1-1실외기 연결관(L103)-제1-1분배 연결관(L105)이 될 수 있다. 이때, 상기 제1-1실외기 연결관(L103)과 상기 제1-1분배 연결관(L105)의 사이에는 상기 제1전달모듈(500)의 제1냉매분배밸브(510)가 배치되고, 상기 제1냉매분배밸브(510)가 이들을 연결해줄 수 있다. At this time, the path through which the first main refrigerant flows to the first recovery heat exchanger 410 may be the first high pressure pipe. Here, the first high pressure pipe may be the first compressor discharge pipe (L101), the 1-1 outdoor unit connection pipe (L103), and the 1-1 distribution connection pipe (L105). At this time, the first refrigerant distribution valve 510 of the first delivery module 500 is disposed between the 1-1 outdoor unit connection pipe (L103) and the 1-1 distribution connection pipe (L105), The first refrigerant distribution valve 510 can connect them.

그리고, 상기 제1실외열교환기(130)로 제1메인냉매가 흐르는 경로도 제1고압관이 될 수 있다. 여기서 제1고압관은 상기 제1압축기 토출관(L101)-제1-1실외열교환 연결관(L102)이 될 수 있다. 참고로, 이때 상기 제1메인실외밸브(150)와 상기 제1서브실외밸브(160)는 OFF상태로 볼 수 있다. In addition, the path through which the first main refrigerant flows to the first outdoor heat exchanger 130 may also be the first high pressure pipe. Here, the first high pressure pipe may be the first compressor discharge pipe (L101)-1-1 outdoor heat exchange connection pipe (L102). For reference, at this time, the first main outdoor valve 150 and the first sub-outdoor valve 160 can be viewed as OFF.

여기서, 상기 제1회수열교환기(410)에는 상기 제1실외열교환기(130) 보다 많은 유량의 제1메인냉매가 공급될 수 있다. 예를 들어, 상기 제1회수열교환기(410)에는 약 70%의 제1메인냉매가 공급되고, 상기 제1실외열교환기(130)에는 약 30%의 제1메인냉매가 공급될 수 있다. Here, the first main refrigerant may be supplied to the first recovery heat exchanger 410 at a flow rate greater than that of the first outdoor heat exchanger 130. For example, about 70% of the first main refrigerant may be supplied to the first recovery heat exchanger 410, and about 30% of the first main refrigerant may be supplied to the first outdoor heat exchanger 130.

상기 제1회수열교환기(410)에서 응축된 제1메인냉매는 중온/고압의 상태가 되어, 상기 제1실내열교환기(421) 및 상기 제2실내열교환기(425)에 전달될 수 있다. 이때, 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)로 유동하는 제1메인냉매의 경로는 제1액관이 될 수 있다. 구체적으로는, 상기 제1실내기 연결관(L128)은 상기 제1실내열교환기(421)로 냉매가 유동하는 제1액관이 되고, 상기 제1실내기 연결관(L128)-제1실내 분기관(L125)은 상기 제2실내열교환기(425)로 냉매가 유동하는 제1액관이 된다. The first main refrigerant condensed in the first recovery heat exchanger 410 is in a medium temperature/high pressure state and can be transferred to the first indoor heat exchanger 421 and the second indoor heat exchanger 425. At this time, the path of the first main refrigerant flowing to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be the first liquid pipe. Specifically, the first indoor unit connection pipe (L128) becomes the first liquid pipe through which the refrigerant flows to the first indoor heat exchanger 421, and the first indoor unit connection pipe (L128) - first indoor branch pipe ( L125) becomes the first liquid pipe through which the refrigerant flows to the second indoor heat exchanger (425).

상기 제1-1실내열교환 연결관(L124)에는 상기 제1실내팽창변(423)이 배치되어, 냉매는 상기 제1실내팽창변(423)에서 팽창된 상태로 증발기인 상기 제1실내열교환기(421)로 유동될 수 있다. 상기 제1-2실내열교환 연결관(L126)에는 상기 제2실내팽창변(427)이 배치되어, 제1메인냉매는 상기 제2실내팽창변(427)에서 팽창된 상태로 증발기인 상기 제2실내열교환기(425)로 유동될 수 있다. The first indoor expansion valve 423 is disposed on the 1-1 indoor heat exchange connection pipe (L124), and the refrigerant is expanded in the first indoor expansion valve 423 in the first indoor heat exchanger 421, which is an evaporator. ) can flow. The second indoor expansion valve 427 is disposed in the first-second indoor heat exchange connection pipe (L126), and the first main refrigerant is expanded in the second indoor expansion valve 427 and is used in the second indoor heat exchanger, which is an evaporator. It can flow into the group 425.

상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 각각 증발기가 되므로, 상기 실내덕트(S) 내부의 공기를 냉각/제습할 수 있다. 상기 제1실내열교환기(421)를 지나면서 1차로 냉각/제습된 외기(OA)는 상기 제2실내열교환기(425)를 지나면서 2차로 냉각/제습될 수 있다. 도 5에서, 외기(OA)가 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)를 지나 배출되는 방향(K1)이 굵은 화살표로 표현되어 있다. Since the first indoor heat exchanger 421 and the second indoor heat exchanger 425 each function as an evaporator, they can cool/dehumidify the air inside the indoor duct (S). Outdoor air (OA) that is primarily cooled/dehumidified while passing through the first indoor heat exchanger 421 may be secondarily cooled/dehumidified while passing through the second indoor heat exchanger 425. In FIG. 5, the direction K1 in which the outside air (OA) passes through the first indoor heat exchanger 421 and the second indoor heat exchanger 425 and is discharged is indicated by a thick arrow.

상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)에는 서로 다른 비율로 제1메인냉매가 공급될 수 있다. 상기 제1회수열교환기(410)에 가까운 상기 제1실내열교환기(421)에는 상기 제2실내열교환기(425) 보다 많은 양의 제1메인냉매가 공급될 수 있다. 앞서 제어부(1000)의 제어에 의해 상기 제1회수열교환기(410)에는 상기 제1실외열교환기(130) 보다 많은 양의 제1메인냉매가 공급되었기 때문이다. 예를 들어, 상기 제1실내열교환기(421)에는 약 70%의 제1메인냉매가 공급되고, 상기 제2실내열교환기(425)에는 약 30%의 제1메인냉매가 공급될 수 있다. The first main refrigerant may be supplied to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 at different ratios. A larger amount of first main refrigerant may be supplied to the first indoor heat exchanger 421, which is close to the first recovery heat exchanger 410, than to the second indoor heat exchanger 425. This is because a larger amount of first main refrigerant was supplied to the first recovery heat exchanger 410 than to the first outdoor heat exchanger 130 under the control of the control unit 1000. For example, about 70% of the first main refrigerant may be supplied to the first indoor heat exchanger 421, and about 30% of the first main refrigerant may be supplied to the second indoor heat exchanger 425.

이때, 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 상기 실내덕트(S)의 내부에서 공기의 유동방향을 따라 서로 나란하게 배치될 수 있다. 따라서, 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 외기(OA)를 연속하여 냉각/제습해줄 수 있다. 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)에 의해 냉각된 외기(OA)는 계속 유동하면서 상기 제습로터(460)를 거치면서 3차로 제습되고, 마지막으로 상기 제3실내열교환기(430)와 제4실내열교환기(435)에 의해 4차 및 5차로 냉각/제습되어 급기(SA)가 되고, 상기 급기구(G3)를 통해 실내공간으로 공급될 수 있다. 상기 3차 내지 5차 제습 구조는 아래에서 다시 설명하기로 한다. At this time, the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be arranged side by side along the air flow direction inside the indoor duct (S). Accordingly, the first indoor heat exchanger 421 and the second indoor heat exchanger 425 can continuously cool/dehumidify the outside air (OA). The outdoor air (OA) cooled by the first indoor heat exchanger 421 and the second indoor heat exchanger 425 continues to flow and is dehumidified three times while passing through the dehumidifying rotor 460, and finally, the third indoor heat exchanger 425 It is cooled/dehumidified in the 4th and 5th stages by the indoor heat exchanger 430 and the fourth indoor heat exchanger 435 to become supply air (SA), and can be supplied to the indoor space through the supply opening (G3). The third to fifth dehumidification structures will be described again below.

상기 제1실내열교환기(421)에서 배출된 저온/저압의 제1메인냉매는 제1열교환 유도관(L117)을 거쳐 상기 제1전달모듈(500)에 유입되고, 상기 제1전달모듈(500)의 내부에서 제1열교환 연결관(L116)을 통해 상기 제1냉매열교환기(530)에 전달될 수 있다. 그리고, 제1메인냉매는 제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)을 통해 상기 제1어큐뮬레이터(120)로 공급된 후에, 제1압축기 흡입관(L115)을 통해 다시 제1실외압축기(110)로 흡입될 수 있다. 따라서 상기 제1열교환 유도관(L117)-제1열교환 연결관(L116)-제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)은 제1저압관이 될 수 있다. The low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 flows into the first transfer module 500 through the first heat exchange induction pipe (L117), and the first transfer module 500 ) can be transmitted to the first refrigerant heat exchanger 530 through the first heat exchange connection pipe (L116). And, the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110. Therefore, the first heat exchange induction pipe (L117) - the first heat exchange connection pipe (L116) - the first accumulator connection pipe (L111) - the first accumulator suction pipe (L113) may be the first low pressure pipe.

상기 제2실내열교환기(425)에서 배출된 저온/저압의 제1메인냉매는 제1-2분배 연결관(L119)을 거쳐 상기 제1전달모듈(500)에 유입되고, 상기 제1전달모듈(500)의 내부의 제1냉매분배밸브(510)를 통해 상기 제1냉매열교환기(530)에 합류될 수 있다. 그리고, 제1메인냉매는 제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)을 통해 상기 제1어큐뮬레이터(120)로 공급된 후에, 제1압축기 흡입관(L115)을 통해 다시 제1실외압축기(110)로 흡입될 수 있다. The low-temperature/low-pressure first main refrigerant discharged from the second indoor heat exchanger (425) flows into the first transfer module (500) through the first-2 distribution connector (L119), and the first transfer module (500) flows into the first transfer module (500). It can be joined to the first refrigerant heat exchanger 530 through the first refrigerant distribution valve 510 inside (500). And, the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110.

이때, 상기 제1냉매열교환기(530)는 상기 제1실내열교환기(421) 및 제2실내열교환기(425)에서 배출된 저온/저압의 제1메인냉매와, 상기 제1실외열교환기(130)에서 응축된 중온/고압의 냉매를 서로 열교환시킬 수 있다. 상기 제1실외열교환기(130)에서 응축된 중온/고압의 제1메인냉매는 상기 제1냉매열교환기(530)를 지나면서 제1실내열교환기(421) 및 제2실내열교환기(425)에서 배출된 저온/저압의 제1메인냉매에 방열(열교환)할 수 있다. 이에 따라 상기 중온/고압의 제1메인냉매는 액상냉매의 상태로 상기 제1실내열교환기(421) 및 제2실내열교환기(425)에 공급될 수 있다. At this time, the first refrigerant heat exchanger 530 is a low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 and the second indoor heat exchanger 425, and the first outdoor heat exchanger ( 130), the condensed medium temperature/high pressure refrigerant can be heat exchanged with each other. The medium-temperature/high-pressure first main refrigerant condensed in the first outdoor heat exchanger (130) passes through the first refrigerant heat exchanger (530) to the first indoor heat exchanger (421) and the second indoor heat exchanger (425). Heat can be dissipated (heat exchanged) into the low-temperature/low-pressure first main refrigerant discharged from . Accordingly, the first main refrigerant of medium temperature/high pressure can be supplied to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 in the state of liquid refrigerant.

앞서 응축기로 동작되는 상기 제1회수열교환기(410)를 보면, 상기 제1회수열교환기(410)는 응축기로 작동하면서 제1회수열교환기(410)의 제1메인냉매는 배기(EA) 쪽으로 방열할 수 있다. 즉, 상기 제1회수열교환기(410)의 제1메인냉매는 상기 제1배기구(G5)를 통해 배출되는 배기(EA)와 열교환하면서 배기(EA)에 방열할 수 있는 것이다. 도 5에서, 환기(RA)가 상기 제1회수열교환기(410)를 지나고, 상기 제1회수열교환기(410)의 제1메인냉매가 상기 배기(EA)로 방열하는 모습이 굵은 화살표로 표현되어 있다. Looking at the first recovery heat exchanger 410 that operates as a condenser, the first recovery heat exchanger 410 operates as a condenser and the first main refrigerant of the first recovery heat exchanger 410 flows toward the exhaust (EA). It can dissipate heat. That is, the first main refrigerant of the first recovery heat exchanger 410 can radiate heat to the exhaust EA while exchanging heat with the exhaust EA discharged through the first exhaust port G5. In Figure 5, the ventilation (RA) passes through the first recovery heat exchanger (410), and the first main refrigerant of the first recovery heat exchanger (410) radiates heat to the exhaust (EA), which is represented by a bold arrow. It is done.

이때, 상기 제1회수열교환기(410)로 공급되는 공기 중 일부는 실내공간에서 흡입된 환기(RA)로, 외부의 기온 보다 낮은 온도를 갖는다. 이처럼 상기 제1회수열교환기(410)와 열교환하는 배기(EA)는 외부의 공기 보다 온도가 낮기 때문에 상기 제1회수열교환기(410)를 지나는 제1메인냉매의 방열이 보다 효과적으로 이루어질 수 있다. 즉, 배기(EA)의 폐열을 이용하여 제1회수열교환기(410)의 제1메인냉매가 보다 효과적으로 방열되는 것이다. 따라서, 상기 제1공조유닛(U1)의 냉동사이클은 운전 고압이 낮아져 효율이 향상되고, 소비전력이 줄어들 수 있다. At this time, some of the air supplied to the first recovery heat exchanger 410 is ventilation (RA) drawn from the indoor space and has a temperature lower than the outside air temperature. In this way, since the exhaust air (EA) that exchanges heat with the first recovery heat exchanger (410) has a lower temperature than the outside air, heat dissipation of the first main refrigerant passing through the first recovery heat exchanger (410) can be performed more effectively. In other words, the first main refrigerant of the first recovery heat exchanger 410 is more effectively dissipated by using the waste heat of the exhaust (EA). Accordingly, the high operating pressure of the refrigeration cycle of the first air conditioning unit (U1) is lowered, thereby improving efficiency and reducing power consumption.

예를 들어, 하절기에 외부의 기온이 매우 높은 환경이라면, 상기 제1회수열교환기(410)의 제1메인냉매는 외부의 공기에 방열하기 어렵고, 냉방 과부하현상이 발생할 수 있다. 그러나 본 실시례에서는 상기 제1회수열교환기(410)의 제1메인냉매와 열교환하는 공기는 실내에서 공급되는 환기(RA)이므로, 외부의 공기 보다 온도가 낮고, 따라서 과부하 없이 원활하게 방열할 수 있는 것이다. For example, in an environment where the outside temperature is very high in the summer, it is difficult for the first main refrigerant of the first recovery heat exchanger 410 to dissipate heat to the outside air, and a cooling overload phenomenon may occur. However, in this embodiment, the air that exchanges heat with the first main refrigerant of the first recovery heat exchanger 410 is ventilation (RA) supplied from indoors, so its temperature is lower than that of the outside air, and therefore heat can be dissipated smoothly without overload. There is.

한편, 상기 제1회수열교환기(410)에 연결된 제1열회수 연결관(L127)에는 상기 제1열회수팽창변(415)이 배치될 수 있다. 상기 제어부(1000)는 상기 제1열회수팽창변(415)의 개도율을 조절하여, 상기 제1회수열교환기(410)에 공급되는 고온/고압의 제1메인냉매 유량을 조절할 수 있다. 상기 제1실외압축기(110)에서 토출되는 고온/고압의 제1메인냉매 유량은 정해져 있으므로, 상기 제1회수열교환기(410)에 공급되는 제1메인냉매 유량이 조절되면 상기 제1실외열교환기(130)로 공급되는 제1메인냉매 유량도 함께 조절될 수 있다. 이러한 냉매유량 조절을 통해서, 상기 제1회수열교환기(410)를 통한 폐열의 회수정도를 조절할 수도 있다. Meanwhile, the first heat recovery expansion valve 415 may be disposed in the first heat recovery connector L127 connected to the first recovery heat exchanger 410. The control unit 1000 can control the flow rate of the high-temperature/high-pressure first main refrigerant supplied to the first recovery heat exchanger 410 by adjusting the opening rate of the first heat recovery expansion valve 415. Since the high-temperature/high-pressure first main refrigerant flow rate discharged from the first outdoor compressor 110 is determined, when the first main refrigerant flow rate supplied to the first recovery heat exchanger 410 is adjusted, the first outdoor heat exchanger 410 The flow rate of the first main refrigerant supplied to (130) can also be adjusted. By adjusting the refrigerant flow rate, the degree of recovery of waste heat through the first recovery heat exchanger 410 can be adjusted.

예를 들어, (i) 상기 환기구(G4)를 통해 유입된 환기(RA)의 온도(실내온도)가 외부의 온도 보다 낮다면, 상기 제1회수열교환기(410)가 응축기로 작동하면서 상기 제1회수열교환기(410)의 제1메인냉매가 상기 환기(RA)에 방열하는 것이 외부의 공기에 방열하는 것 보다 효과적이다. 하지만, (ii) 상기 환기구(G4)를 통해 유입된 환기(RA)의 온도(실내온도)가 외부의 온도 보다 높다면, 상기 제1회수열교환기(410)가 응축기로 작동하면서 제1회수열교환기(410)의 제1메인냉매가 상기 환기(RA)에 방열하는 것은 외부의 공기에 방열하는 것 보다 효율이 낮다. 이 경우에는 상기 제1열회수팽창변(415)의 개도율을 조절하여, 응축기인 제1회수열교환기(410)로 유입되는 제1메인냉매의 유량을 줄이고, 다른 응축기인 제1실외열교환기(130)로 유입되는 제1메인냉매의 유량을 늘려 방열효율을 높일 수 있다. For example, (i) if the temperature (indoor temperature) of the ventilation (RA) introduced through the ventilation opening (G4) is lower than the external temperature, the first recovery heat exchanger (410) operates as a condenser and the first recovery heat exchanger (410) operates as a condenser. It is more effective for the first main refrigerant of the single recovery heat exchanger (410) to radiate heat to the ventilation (RA) than to radiate heat to the outside air. However, (ii) if the temperature (indoor temperature) of the ventilation (RA) introduced through the ventilation opening (G4) is higher than the external temperature, the first recovery heat exchanger (410) operates as a condenser and the first recovery heat exchanger Dissipation of heat by the first main refrigerant of the unit 410 to the ventilation RA is less efficient than dissipation of heat to external air. In this case, the opening rate of the first heat recovery expansion valve 415 is adjusted to reduce the flow rate of the first main refrigerant flowing into the first recovery heat exchanger 410, which is a condenser, and the first outdoor heat exchanger 130, which is another condenser. ), heat dissipation efficiency can be increased by increasing the flow rate of the first main refrigerant flowing into the system.

이어서, 도 4와 도 6을 참조하여 제1공조모드일 때 상기 제2공조유닛(U2)에서 제2메인냉매의 흐름과 제1재생냉매의 흐름을 보면, 상기 제2실외압축기(210)가 제2메인냉매를 압축하여, 고온/고압의 제2메인냉매를 제2압축기 토출관(L201)으로 토출한다. 토출된 고온/고압의 제2메인냉매 중 일부는 상기 제2전달모듈(600)을 통해 제1모듈열교환기(730)로 전달되고, 나머지 일부는 상기 제2실외열교환기(230)로 전달된다. 상기 제1모듈열교환기(730)와 상기 제2실외열교환기(230)가 각각 응축기로 사용될 수 있다. Next, referring to FIGS. 4 and 6 and looking at the flow of the second main refrigerant and the first regenerative refrigerant in the second air conditioning unit (U2) in the first air conditioning mode, the second outdoor compressor (210) The second main refrigerant is compressed, and the high-temperature/high-pressure second main refrigerant is discharged through the second compressor discharge pipe (L201). Some of the discharged high-temperature/high-pressure second main refrigerant is transferred to the first module heat exchanger (730) through the second transfer module (600), and the remaining part is transferred to the second outdoor heat exchanger (230). . The first module heat exchanger 730 and the second outdoor heat exchanger 230 may each be used as a condenser.

이때, 상기 제1모듈열교환기(730)로 제2메인냉매가 흐르는 경로는 제2고압관이 될 수 있다. 여기서 제2고압관은 상기 제2압축기 토출관(L201)-제2-1실외기 연결관(L203)-제2-1분배 연결관(L205)이 될 수 있다. 이때, 상기 제2-1실외기 연결관(L203)과 상기 제2-1분배 연결관(L205)의 사이에는 상기 제2전달모듈(600)의 제2냉매분배밸브(610)가 배치되고, 상기 제2냉매분배밸브(610)가 이들을 연결해줄 수 있다. At this time, the path through which the second main refrigerant flows to the first module heat exchanger 730 may be the second high pressure pipe. Here, the second high pressure pipe may be the second compressor discharge pipe (L201) - the 2-1 outdoor unit connection pipe (L203) - the 2-1 distribution connection pipe (L205). At this time, the second refrigerant distribution valve 610 of the second delivery module 600 is disposed between the 2-1 outdoor unit connection pipe (L203) and the 2-1 distribution connection pipe (L205), The second refrigerant distribution valve 610 can connect them.

그리고, 상기 제2실외열교환기(230)로 제2메인냉매가 흐르는 경로도 제2고압관이 될 수 있다. 여기서 제2고압관은 상기 제2압축기 토출관(L201)-제2-1실외열교환 연결관(L202)이 될 수 있다. 참고로, 이때 상기 제2메인실외밸브(250)와 상기 제2서브실외밸브(260)는 OFF상태로 볼 수 있다. In addition, the path through which the second main refrigerant flows to the second outdoor heat exchanger 230 may also be a second high-pressure pipe. Here, the second high pressure pipe may be the second compressor discharge pipe (L201) - the 2-1 outdoor heat exchange connection pipe (L202). For reference, at this time, the second main outdoor valve 250 and the second sub-outdoor valve 260 can be viewed as OFF.

상기 제1모듈열교환기(730)와 상기 제2실외열교환기(230)에서 각각 응축된 제2메인냉매는 서로 혼합되어 상기 제2회수열교환기(440)에서 증발될 수 있다. 상기 제2회수열교환기(440)의 제2메인냉매는 상기 실내기(400)에서 외부로 배출되는 배기(EA)로부터 흡열할 수 있다. 이때, 상기 배기(EA)는 외부의 공기 보다 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제2공조유닛(U2)에 의한 냉동사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. The second main refrigerant condensed in the first module heat exchanger 730 and the second outdoor heat exchanger 230 may be mixed with each other and evaporated in the second recovery heat exchanger 440. The second main refrigerant of the second recovery heat exchanger (440) may absorb heat from the exhaust (EA) discharged to the outside from the indoor unit (400). At this time, since the temperature of the exhaust EA is higher than that of the external air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the second air conditioning unit (U2) increases, thereby reducing power consumption.

결과적으로, 상기 제2회수열교환기(440)는 증발기로 동작될 때 배기(EA)의 온도를 활용하므로, 상기 제2공조유닛(U2)의 냉동사이클을 운전하는데 필요한 전력의 소모를 줄이는 기능을 할 수 있다. As a result, the second recovery heat exchanger (440) utilizes the temperature of the exhaust (EA) when operating as an evaporator, thereby reducing the power consumption required to operate the refrigeration cycle of the second air conditioning unit (U2). can do.

이를 위해서, 상기 제2회수열교환기(440)는 배기(EA)가 배출되는 제2배기구(G6)에 인접하게 배치될 수 있다. 달리 표현하면, 상기 제2회수열교환기(440)는 상기 제2회수열교환기(440)의 표면이 상기 제2배기구(G6)를 향하도록 상기 실내덕트(S) 내부에 배치될 수 있다. 도 4를 보면, 상기 제2회수열교환기(440)를 거친 배기(EA)는 제2배기구(G6)를 통해 외부 공간으로 배출될 수 있다.To this end, the second recovery heat exchanger 440 may be placed adjacent to the second exhaust port G6 through which the exhaust gas EA is discharged. In other words, the second recovery heat exchanger 440 may be disposed inside the indoor duct (S) such that the surface of the second recovery heat exchanger (440) faces the second exhaust port (G6). Referring to FIG. 4, the exhaust EA that has passed through the second recovery heat exchanger 440 may be discharged to the external space through the second exhaust port G6.

이때, 상기 제2회수열교환기(440)는 상기 제습로터(460)와 상기 제2배기구(G6)의 사이에 배치될 수 있다. 상기 제습로터(460)를 통해 가열된 공기는 상기 제2배기구(G6)로 배출되는 배기(EA)가 되고, 이러한 배기(EA)를 이용하여 상기 제2회수열교환기(440)의 증발효율이 더욱 높아질 수 있다. At this time, the second recovery heat exchanger 440 may be disposed between the dehumidification rotor 460 and the second exhaust port G6. The air heated through the dehumidifying rotor 460 becomes exhaust air (EA) discharged through the second exhaust port (G6), and the evaporation efficiency of the second recovery heat exchanger (440) is increased by using this exhaust air (EA). It can go even higher.

앞서 설명한 바와 같이, 상기 제1재생열교환기(450)는 상기 제1열교환모듈(700)과 함께 제1재생냉매를 유동시키는 별도의 제1재생냉매사이클을 구성할 수 있다. 여기서, 응축기로 동작되는 상기 제1재생열교환기(450)에서 발생된 열은 상기 제습로터(460)에 전달될 수 있다. 상기 제2외기구(G2)로 유입된 공기와, 상기 제2바이패스(B2)를 통해 전달된 공기, 그리고 상기 제2재생열교환기(470)를 지난 공기는 상기 제1재생열교환기(450)를 지나면서 열교환되어 온도가 더욱 상승할 수 있다. As described above, the first regenerative heat exchanger 450, together with the first heat exchange module 700, may form a separate first regenerative refrigerant cycle that flows the first regenerative refrigerant. Here, heat generated in the first regenerative heat exchanger 450, which operates as a condenser, may be transferred to the dehumidification rotor 460. The air introduced into the second external mechanism (G2), the air delivered through the second bypass (B2), and the air passing through the second regenerative heat exchanger (470) are transferred to the first regenerative heat exchanger (450). ), heat exchange occurs and the temperature may rise further.

그리고, 이렇게 가열된 공기가 상기 제습로터(460)로 전달되어 제습로터(460)를 재생시킬 수 있다. 따라서, 제습로터(460)의 재생을 위한 재생히터(465)의 사용량이 줄어들 수 있고, 결과적으로 제2공조유닛(U2)을 구동하기 위한 소비전력이 줄어들 수 있다. 도 6에서, 상기 제1재생열교환기(450)에서 방열된 공기가 상기 제습로터(460)를 지나는 모습이 굵은 화살표로 표현되어 있다. And, the heated air can be delivered to the dehumidification rotor 460 to regenerate the dehumidification rotor 460. Accordingly, the amount of use of the regeneration heater 465 for regeneration of the dehumidification rotor 460 can be reduced, and as a result, the power consumption for driving the second air conditioning unit (U2) can be reduced. In Figure 6, the air radiated from the first regenerative heat exchanger 450 passing through the dehumidifying rotor 460 is represented by a thick arrow.

한편, 상기 제1모듈열교환기(730)에는 상기 제2실외열교환기(230) 보다 많은 유량이 제2메인냉매가 공급될 수 있다. 예를 들어, 상기 제1열교환모듈(700)에는 약 70%의 제2메인냉매가 공급되고, 상기 제2실외열교환기(230)에는 약 30%의 제2메인냉매가 공급될 수 있다. Meanwhile, the second main refrigerant may be supplied to the first module heat exchanger 730 at a flow rate greater than that of the second outdoor heat exchanger 230. For example, about 70% of the second main refrigerant may be supplied to the first heat exchange module 700, and about 30% of the second main refrigerant may be supplied to the second outdoor heat exchanger 230.

동시에, 상기 제1열교환모듈(700)과 상기 제1재생열교환기(450)로 구성된 제1재생냉매사이클에는 제1재생냉매가 흐를 수 있다. 상기 제1모듈압축기(710)는 압축한 고온/고압의 제1재생냉매를 제1모듈압축기(710) 토출관(L245)으로 토출한다. 토출된 고온/고압의 제1재생냉매는 상기 제1재생열교환기(450)로 전달되고, 상기 제1재생열교환기(450)는 제1재생냉매를 응축할 수 있다. At the same time, the first regenerative refrigerant may flow through the first regenerative refrigerant cycle composed of the first heat exchange module 700 and the first regenerative heat exchanger 450. The first module compressor 710 discharges the compressed high-temperature/high-pressure first regenerative refrigerant to the discharge pipe L245 of the first module compressor 710. The discharged high-temperature/high-pressure first regenerative refrigerant is transferred to the first regenerative heat exchanger 450, and the first regenerative heat exchanger 450 can condense the first regenerative refrigerant.

상기 제1재생열교환기(450)가 제1재생냉매를 응축하는 과정에서 제1재생냉매는 방열하게 되고, 방열 후 제1재생냉매는 중온 고압 액상 냉매로 전환될 수 있다. 그리고, 제1재생냉매는 제1재생열교환 연결관(L247)을 통해 상기 제1모듈팽창변(740)으로 전달되어 팽창된 후에, 제1모듈열교환 연결관(L248)을 통해 상기 제1모듈열교환기(730)로 전달되어 증발될 수 있다. 증발된 제1재생냉매는 상기 제1모듈어큐뮬레이터 흡입관(L241)을 통해서 제1모듈어큐뮬레이터(720)로 전달될 수 있다. In the process of the first regenerative heat exchanger 450 condensing the first regenerative refrigerant, the first regenerative refrigerant radiates heat, and after dissipating heat, the first regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. Then, the first regenerative refrigerant is delivered to the first module expansion valve 740 through the first regenerative heat exchange connection pipe (L247) and expanded, and then through the first module heat exchange connection pipe (L248) to the first module heat exchanger. It may be delivered to (730) and evaporated. The evaporated first regenerated refrigerant may be delivered to the first module accumulator 720 through the first module accumulator suction pipe (L241).

이때, 상기 제1모듈열교환기(730)를 통과하는 제2메인냉매와 제1재생냉매는 서로 열교환될 수 있다. 상기 제2메인냉매는 상기 제1모듈열교환기(730)에서 응축되면서 제1재생냉매에 방열하며 액상으로 전환될 수 있다. 따라서, 제2메인냉매가 보다 효과적으로 방열될 수 있고, 상기 제2공조유닛(U2)의 제2메인냉매사이클은 운전 고압이 낮아져 효율이 향상되고, 소비전력이 줄어들 수 있다. At this time, the second main refrigerant and the first regenerated refrigerant passing through the first module heat exchanger 730 may exchange heat with each other. The second main refrigerant may be condensed in the first module heat exchanger 730, radiating heat to the first regenerated refrigerant, and converted into a liquid phase. Accordingly, the second main refrigerant can dissipate heat more effectively, and the operating high pressure of the second main refrigerant cycle of the second air conditioning unit (U2) is lowered, improving efficiency and reducing power consumption.

반대로, 상기 제1재생냉매는 상기 제1모듈열교환기(730)에서 증발되면서, 상기 제1재생냉매는 상기 제1모듈열교환기(730)를 흐르는 제2메인냉매로부터 흡열할 수 있다. 이때, 상기 제2메인냉매의 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제2공조유닛(U2)을 구성하는 제1재생냉매사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. Conversely, as the first regenerated refrigerant evaporates in the first module heat exchanger 730, the first regenerated refrigerant may absorb heat from the second main refrigerant flowing through the first module heat exchanger 730. At this time, because the temperature of the second main refrigerant is high, the amount of heat absorption may increase. Accordingly, the operating low pressure of the first regenerative refrigerant cycle constituting the second air conditioning unit (U2) increases, thereby reducing power consumption.

특히, 상기 제1재생냉매사이클을 구성하는 상기 제1재생열교환기(450)의 공기 취출온도를 약 80℃ 이상으로 높여, 고온재생형의 제습로터(460)의 재생 에너지로 사용할 수 있다. 이렇게 되면, 효율이 낮은 상기 재생히터(465)의 사용량을 줄여 에너지효율을 더욱 높일 수 있다. In particular, the air blowing temperature of the first regenerative heat exchanger 450, which constitutes the first regenerative refrigerant cycle, can be increased to about 80°C or higher and used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. In this way, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.

상기 제3공조유닛(U3)을 구성하는 제2재생열교환기(470)를 통과하면서 가열된 공기는 상기 제1재생열교환기(450) 방향(K3)으로 전달될 수 있다. 도 6을 보면, 공기의 흐름이 굵은 화살표로 표현되어 있다. 상기 제1재생열교환기(450)의 방향(K3)으로 전달된 공기는 상기 제1재생열교환기(450)에 의해 다시 한번 승온된 상태로 상기 제습로터(460)에 전달될 수 있다. 그리고, 상기 제습로터(460)를 고온으로 재생시킨 공기는 상기 제2회수열교환기(440)로 전달될 수 있다. 상기 제2회수열교환기(440)를 거친 공기는 배기(EA)될 수 있다. Air heated while passing through the second regenerative heat exchanger 470 constituting the third air conditioning unit U3 may be transferred in the direction K3 to the first regenerative heat exchanger 450. Looking at Figure 6, the air flow is represented by a thick arrow. The air delivered in the direction K3 of the first regenerative heat exchanger 450 may be delivered to the dehumidifying rotor 460 in a state whose temperature is raised again by the first regenerative heat exchanger 450. In addition, the air regenerated to high temperature by the dehumidification rotor 460 may be delivered to the second recovery heat exchanger 440. Air that has passed through the second recovery heat exchanger 440 may be exhausted (EA).

이어서, 도 4와 도 7을 참조하여 제1공조모드일 때 상기 제3공조유닛(U3)에서 제3메인냉매유동과 제2재생냉매유동을 보면, 상기 제3실외압축기(310)가 제3메인냉매를 압축하여, 고온/고압의 제3메인냉매를 제3압축기 토출관(L301)으로 토출한다. 토출된 고온/고압의 제3메인냉매 중 일부는 상기 제3전달모듈(800)을 통해 제2모듈열교환기(930)로 전달되고, 나머지 일부는 상기 제3실외열교환기(330)로 전달된다. 상기 제2모듈열교환기(930)와 상기 제3실외열교환기(330)가 각각 응축기로 사용될 수 있다. Next, referring to FIGS. 4 and 7 and looking at the third main refrigerant flow and the second regenerative refrigerant flow in the third air conditioning unit (U3) in the first air conditioning mode, the third outdoor compressor 310 is the third refrigerant flow. The main refrigerant is compressed, and the high-temperature/high-pressure third main refrigerant is discharged through the third compressor discharge pipe (L301). Some of the discharged high-temperature/high-pressure third main refrigerant is transferred to the second module heat exchanger (930) through the third transfer module (800), and the remaining part is transferred to the third outdoor heat exchanger (330). . The second module heat exchanger 930 and the third outdoor heat exchanger 330 may each be used as a condenser.

이때, 상기 제2모듈열교환기(930)로 제3메인냉매가 흐르는 경로는 제2고압관이 될 수 있다. 여기서 제2고압관은 상기 제3압축기 토출관(L301)-제3-1실외기 연결관(L303)-제3-1분배 연결관(L305)이 될 수 있다. 이때, 상기 제3-1실외기 연결관(L303)과 상기 제3-1분배 연결관(L305)의 사이에는 상기 제3전달모듈(800)의 제3냉매분배밸브(810)가 배치되고, 상기 제3냉매분배밸브(810)가 이들을 연결해줄 수 있다. At this time, the path through which the third main refrigerant flows to the second module heat exchanger 930 may be the second high pressure pipe. Here, the second high pressure pipe may be the third compressor discharge pipe (L301) - the 3-1 outdoor unit connection pipe (L303) - the 3-1 distribution connection pipe (L305). At this time, the third refrigerant distribution valve 810 of the third delivery module 800 is disposed between the 3-1 outdoor unit connection pipe (L303) and the 3-1 distribution connection pipe (L305), The third refrigerant distribution valve 810 can connect them.

상기 제2모듈열교환기(930)에서 응축된 제3메인냉매는 중온/고압의 상태가 되어, 상기 제3실내열교환기(430) 및 제4실내열교환기(435)에 전달될 수 있다. 이때, 상기 제3실외열교환기(330)에 의해 응축된 제3메인냉매는 제3냉매열교환기(830)를 거쳐, 상기 제2모듈열교환기(930)에서 응축된 제3메인냉매와 혼합될 수 있다. 이렇게 혼합된 제3메인냉매는 제3실내열교환기(430)와 제4실내열교환기(435)로 전달될 수 있다. The third main refrigerant condensed in the second module heat exchanger 930 is in a medium temperature/high pressure state and can be delivered to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435. At this time, the third main refrigerant condensed by the third outdoor heat exchanger 330 passes through the third refrigerant heat exchanger 830 and is mixed with the third main refrigerant condensed in the second module heat exchanger 930. You can. The third main refrigerant mixed in this way can be delivered to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.

상기 제3냉매열교환기(830)에는 제3 및 제4실내열교환기(430, 435)에서 증발된 저온/저압의 제3메인냉매가 흐르고 있다. 따라서, 앞서 제3실외열교환기(330)에 의해 응축된 중온/고압의 제3메인냉매는 상기 제3냉매열교환기(830)를 지날 때 상기 저온/저압의 제3메인냉매에 방열(열교환)하여 액상 냉매로 전환된 후, 제2모듈열교환기(930)에서 응축된 제3메인냉매와 혼합될 수 있다. The low-temperature/low-pressure third main refrigerant evaporated from the third and fourth indoor heat exchangers (430, 435) flows through the third refrigerant heat exchanger (830). Therefore, the medium-temperature/high-pressure third main refrigerant previously condensed by the third outdoor heat exchanger 330 radiates heat (heat exchange) to the low-temperature/low-pressure third main refrigerant when passing through the third refrigerant heat exchanger 830. After being converted to a liquid refrigerant, it can be mixed with the third main refrigerant condensed in the second module heat exchanger (930).

상기 제3실내열교환기(430)와 제4실내열교환기(435)로 유동하는 제3메인냉매의 경로는 제3액관이 될 수 있다. 구체적으로는, 상기 제3-2실외기 연결관(L322)-제2메인연결관(L323)-제4열교환 전달관(L324)은 상기 제3실내열교환기(430)와 제4실내열교환기(435)로 냉매가 유동하는 제3액관이 된다. The path of the third main refrigerant flowing to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be a third liquid pipe. Specifically, the 3-2 outdoor unit connection pipe (L322) - the 2nd main connection pipe (L323) - the 4th heat exchange transmission pipe (L324) is connected to the 3rd indoor heat exchanger 430 and the 4th indoor heat exchanger ( 435), which becomes the third liquid pipe through which the refrigerant flows.

상기 제1실내열교환기(421), 상기 제2실내열교환기(425), 상기 제습로터(460)의 일부와 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 상기 실내덕트(S)의 내부에서 공기의 유동방향을 따라 서로 연속되게 배치될 수 있다. 따라서, 상기 제1실내열교환기(421), 상기 제2실내열교환기(425), 상기 제습로터(460)의 일부와 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 외기(OA)를 총 5차에 걸쳐 연속적으로 제습하면서 외기(OA)의 습도를 크게 낮출 수 있다. The first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidifying rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are installed in the indoor space. Inside the duct (S), they may be arranged continuously along the direction of air flow. Accordingly, the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidification rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are The humidity of the outdoor air (OA) can be greatly reduced by continuously dehumidifying the outdoor air (OA) a total of five times.

상기 제3실내열교환기(430)에서 배출된 저온/저압의 제3메인냉매는 제3열교환 전달관(L317)을 거쳐 상기 제3전달모듈(800)에 유입되고, 상기 제3전달모듈(800)의 내부에서 제3열교환 연결관(L316)을 통해 상기 제3냉매열교환기(830)에 전달될 수 있다. 동시에, 상기 제4실내열교환기(435)에서 배출된 저온/저압의 제3메인냉매는 제3-2분배 연결관(L319)을 거쳐 상기 제3전달모듈(800)에 유입되고, 상기 제3전달모듈(800)의 내부에서 제3냉매분배밸브(810)을 경유하여 상기 제3냉매열교환기(830)에 전달될 수 있다.The low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 flows into the third transfer module 800 through the third heat exchange transfer pipe (L317), and the third transfer module 800 ) can be transmitted to the third refrigerant heat exchanger (830) through the third heat exchange connection pipe (L316). At the same time, the low-temperature/low-pressure third main refrigerant discharged from the fourth indoor heat exchanger (435) flows into the third transfer module (800) through the third-2 distribution connector (L319), and the third main refrigerant is discharged from the fourth indoor heat exchanger (435). Inside the transfer module 800, the refrigerant may be transferred to the third refrigerant heat exchanger 830 via the third refrigerant distribution valve 810.

그리고, 상기 제3냉매열교환기(830)를 통과한 제3메인냉매는 제3어큐뮬레이터 연결관(L311)-제3어큐뮬레이터 흡입관(L313)을 통해 상기 제3어큐뮬레이터(420)로 공급된 후에, 제3압축기 흡입관(L315)을 통해 다시 제3실외압축기(310)로 흡입될 수 있다. 따라서 상기 제3-2분배 연결관(L319)-제3열교환 연결관(L316)-제3어큐뮬레이터 연결관(L311)-제3어큐뮬레이터 흡입관(L313)은 제3저압관이 될 수 있다. And, the third main refrigerant that has passed through the third refrigerant heat exchanger (830) is supplied to the third accumulator (420) through the third accumulator connection pipe (L311) and the third accumulator suction pipe (L313). It can be sucked back into the third outdoor compressor (310) through the third compressor suction pipe (L315). Therefore, the 3-2 distribution connection pipe (L319) - the 3rd heat exchange connection pipe (L316) - the 3rd accumulator connection pipe (L311) - the 3rd accumulator suction pipe (L313) can be a third low pressure pipe.

이때, 상기 제3냉매열교환기(830)는 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 배출된 저온/저압의 제3메인냉매와, 상기 제3실외열교환기(330)에서 응축된 중온/고압의 제3메인냉매를 서로 열교환시킬 수 있다. 상기 제3실외열교환기(330)에서 응축된 중온/고압의 제3메인냉매는 상기 제3냉매열교환기(830)를 지나면서 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 배출된 저온/저압의 제3메인냉매에 방열할 수 있다. 이에 따라 상기 중온/고압의 제3메인냉매는 액상냉매의 상태로 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에 공급될 수 있다. At this time, the third refrigerant heat exchanger 830 is a low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the third outdoor heat exchanger. The medium temperature/high pressure third main refrigerant condensed at (330) can be heat exchanged with each other. The medium-temperature/high-pressure third main refrigerant condensed in the third outdoor heat exchanger (330) passes through the third refrigerant heat exchanger (830) to the third indoor heat exchanger (430) and the fourth indoor heat exchanger (435). ) can radiate heat to the low-temperature/low-pressure third main refrigerant discharged from ). Accordingly, the third main refrigerant of medium temperature/high pressure can be supplied to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 in the state of a liquid refrigerant.

동시에, 상기 제2열교환모듈(900)과 상기 제2재생열교환기(470)로 구성된 제2재생냉매사이클에는 제2재생냉매가 흐를 수 있다. 상기 제2모듈압축기(910)는 압축한 고온/고압의 제2재생냉매를 제2모듈압축기(910) 토출관(L345)으로 토출한다. 토출된 고온/고압의 제2재생냉매는 상기 제2재생열교환기(470)로 전달되고, 상기 제2재생열교환기(470)는 제2재생냉매를 응축할 수 있다. At the same time, the second regenerative refrigerant may flow through the second regenerative refrigerant cycle composed of the second heat exchange module 900 and the second regenerative heat exchanger 470. The second module compressor 910 discharges the compressed high-temperature/high-pressure second regenerative refrigerant to the discharge pipe L345 of the second module compressor 910. The discharged high-temperature/high-pressure second regenerative refrigerant is transferred to the second regenerative heat exchanger 470, and the second regenerative heat exchanger 470 can condense the second regenerative refrigerant.

상기 제2재생열교환기(470)가 제2재생냉매를 응축하는 과정에서 제2재생냉매는 방열하게 되고, 방열 후 제2재생냉매는 중온 고압 액상 냉매로 전환될 수 있다. 그리고, 제2재생냉매는 제2재생열교환 연결관(L347)을 통해 상기 제2모듈팽창변(940)으로 전달되어 팽창된 후에, 상기 제2모듈열교환기(930)로 전달되어 증발될 수 있다. 증발된 제2재생냉매는 상기 제2모듈어큐뮬레이터 흡입관(L341)을 통해서 제2모듈어큐뮬레이터로 전달될 수 있다. In the process of condensing the second regenerative refrigerant by the second regenerative heat exchanger 470, the second regenerative refrigerant radiates heat, and after dissipating heat, the second regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. In addition, the second regenerative refrigerant may be transferred to the second module expansion valve 940 through the second regenerative heat exchange connection pipe L347 and expanded, and then transferred to the second module heat exchanger 930 to be evaporated. The evaporated second regenerated refrigerant may be delivered to the second module accumulator through the second module accumulator suction pipe (L341).

이때, 상기 제2모듈열교환기(930)를 통과하는 제3메인냉매와 제2재생냉매는 서로 열교환될 수 있다. 상기 제3메인냉매는 상기 제2모듈열교환기(930)에서 응축되면서 제2재생냉매에 방열하며 액상으로 전환될 수 있다. 따라서, 제3메인냉매가 보다 효과적으로 방열될 수 있고, 상기 제3공조유닛(U3)의 제3메인냉매사이클은 운전 고압이 낮아져 효율이 향상되고, 소비전력이 줄어들 수 있다. At this time, the third main refrigerant and the second regenerative refrigerant passing through the second module heat exchanger 930 may exchange heat with each other. The third main refrigerant may be condensed in the second module heat exchanger 930, radiating heat to the second regenerated refrigerant, and converted into a liquid phase. Accordingly, the third main refrigerant can dissipate heat more effectively, and the operating high pressure of the third main refrigerant cycle of the third air conditioning unit (U3) is lowered, improving efficiency and reducing power consumption.

반대로, 상기 제2재생냉매는 상기 제2모듈열교환기(930)에서 증발되면서, 상기 제2재생냉매는 상기 제2모듈열교환기(930)를 흐르는 제3메인냉매로부터 흡열할 수 있다. 이때, 상기 제3메인냉매의 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제3공조유닛(U3)을 구성하는 제2재생냉매사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. 특히, 상기 제2재생냉매사이클을 구성하는 상기 제2재생열교환기(470)의 공기 취출온도를 약 60℃ 이상으로 높여, 상기 제1재생열교환기(450) 방향(K3)으로 전달할 수 있다. 이렇게 전달된 공기는 고온재생형의 제습로터(460)의 재생 에너지로 사용할 수 있다. 따라서, 효율이 낮은 상기 재생히터(465)의 사용량을 줄여 에너지효율을 더욱 높일 수 있다. Conversely, while the second regenerated refrigerant is evaporated in the second module heat exchanger 930, the second regenerated refrigerant can absorb heat from the third main refrigerant flowing through the second module heat exchanger 930. At this time, because the temperature of the third main refrigerant is high, the amount of heat absorption may increase. Accordingly, the operating low pressure of the second regenerative refrigerant cycle constituting the third air conditioning unit (U3) increases, thereby reducing power consumption. In particular, the air blowing temperature of the second regenerative heat exchanger 470, which constitutes the second regenerative refrigerant cycle, can be increased to about 60°C or higher and delivered in the direction K3 to the first regenerative heat exchanger 450. The air delivered in this way can be used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. Therefore, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.

특히, 제3메인냉매는 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 증발하면서 공기를 냉각/제습하게 되는데, 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)를 증발시키기 위해 상기 제2모듈열교환기(930)는 제3메인냉매를 응축시키면서 방열해야 한다. 이 과정에서 발생하는 방열에너지를 제2재생냉매사이클이 흡수하여, 상기 제2재생열교환기(470)가 방열할 때 발생하는 공기 취출온도를 더욱 높일 수 있다. 이에 따라, 상기 제습히터(365)의 사용량을 더욱 줄일 수 있다. In particular, the third main refrigerant cools/dehumidifies the air while evaporating in the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435. In order to evaporate the indoor heat exchanger 435, the second module heat exchanger 930 must dissipate heat while condensing the third main refrigerant. The second regenerative refrigerant cycle absorbs the heat dissipation energy generated in this process, and the air discharge temperature generated when the second regenerative heat exchanger 470 radiates heat can be further increased. Accordingly, the amount of use of the dehumidification heater 365 can be further reduced.

도 7을 보면, 외부에서 흡입된 외기(OA)는 상기 제3공조유닛(U3)을 구성하는 제2재생열교환기(470)를 통과하면서 가열되고, 가열된 공기는 상기 제1재생열교환기(450) 방향(K3)으로 전달될 수 있다. 또한, 앞서 제습로터(460)를 통과한 공기가 상기 제3실내열교환기(430)의 방향(K2)으로 전달되면, 제3실내열교환기(430)와 상기 제4실내열교환기(435)를 순서대로 거치게 된다. 이 과정에서 공기는 4차 및 5차 제습이 이루어져 매우 낮은 습도를 가질 수 있다. 그리고, 습도가 낮춰진 공기는 상기 급기구(G3)를 통해서 실내공간으로 공급될 수 있다. Referring to FIG. 7, outside air (OA) sucked in from the outside is heated while passing through the second regenerative heat exchanger (470) constituting the third air conditioning unit (U3), and the heated air is transferred to the first regenerative heat exchanger ( 450) can be transmitted in the direction (K3). In addition, when the air that previously passed through the dehumidifying rotor 460 is delivered in the direction K2 of the third indoor heat exchanger 430, the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 are connected to each other. It goes through in order. In this process, the air undergoes 4th and 5th dehumidification and can have very low humidity. Additionally, air with reduced humidity can be supplied to the indoor space through the air supply opening (G3).

다음으로, 제2공조모드에 대해 설명한다. 도 8 내지 도 11에는 상기 제2공조모드일 때 냉매의 흐름이 도시되어 있다. 상기 제2공조모드는 제습과 함께, 실내온도를 높이기 위한 공기의 가열기능도 할 수 있다. Next, the second air conditioning mode will be described. 8 to 11 show the flow of refrigerant in the second air conditioning mode. The second air conditioning mode can perform a dehumidifying and air heating function to increase the indoor temperature.

먼저 도 3를 참고하여 제2공조모드의 개략적인 운전을 보면, 상기 제2공조모드가 선택되면(S320), 상기 제1공조유닛(U1), 상기 제2공조유닛(U2) 및 상기 제3공조유닛(U3)을 구성하는 구성요소의 동작이 제어될 수 있다(S420). 구체적으로는, 상기 제1실외압축기(110), 제2실외압축기(210), 제3실외압축기(310), 제1모듈압축기(710) 및 제2모듈압축기(910)가 동작된다. First, looking at the schematic operation of the second air conditioning mode with reference to FIG. 3, when the second air conditioning mode is selected (S320), the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U1) The operation of the components constituting the air conditioning unit (U3) can be controlled (S420). Specifically, the first outdoor compressor 110, the second outdoor compressor 210, the third outdoor compressor 310, the first module compressor 710, and the second module compressor 910 are operated.

그리고 상기 제1재생열교환기(450), 제2재생열교환기(470), 제1모듈열교환기(730) 및 제2모듈열교환기(930)는 각각 응축기로 동작될 수 있다. 상기 제1실외열교환기(130), 상기 제2실외열교환기(230), 제3실외열교환기(330), 제1실내열교환기(421), 상기 제3실내열교환기(430), 제4실내열교환기(435), 제1회수열교환기(410) 및 제2회수열교환기(440)(350), 그리고 제1모듈열교환기(730) 및 제2모듈열교환기(930)는 각각 증발기로 동작될 수 있다. In addition, the first regenerative heat exchanger 450, the second regenerative heat exchanger 470, the first module heat exchanger 730, and the second module heat exchanger 930 may each be operated as a condenser. The first outdoor heat exchanger (130), the second outdoor heat exchanger (230), the third outdoor heat exchanger (330), the first indoor heat exchanger (421), the third indoor heat exchanger (430), and the fourth The indoor heat exchanger (435), the first recovery heat exchanger (410) and the second recovery heat exchanger (440) (350), and the first module heat exchanger (730) and the second module heat exchanger (930) are each used as an evaporator. It can work.

앞서 설명한 바와 같이, 상기 제1모듈열교환기(730) 및 제2모듈열교환기(930)는 판형 열교환기로 구성될 수 있고, 따라서 제2메인냉매 및 제3메인냉매의 응축기이자 제1재생냉매 및 제2재생냉매의 증발기가 될 수 있다. As described above, the first module heat exchanger 730 and the second module heat exchanger 930 may be configured as a plate-type heat exchanger, and therefore are condensers of the second main refrigerant and third main refrigerant and the first regenerative refrigerant and It can be an evaporator for the second regenerated refrigerant.

도 8에는 제2공조모드일 때 냉매유동이 화살표로 표시되어 있고, 도 9에는 제1공조유닛(U1)에서 제1메인냉매유동이 순서도 형태로 도시되어 있으며, 도 10에는 제2공조유닛(U2)에서 제2메인냉매유동과 제1재생냉매유동이 순서도 형태로 도시되어 있고, 도 11에는 제3공조유닛(U3)에서 제3메인냉매유동과 제2재생냉매유동이 순서도 형태로 도시되어 있다. In Figure 8, the refrigerant flow in the second air conditioning mode is indicated by an arrow, in Figure 9, the first main refrigerant flow in the first air conditioning unit (U1) is shown in the form of a flowchart, and in Figure 10, the second air conditioning unit (U1) In U2), the second main refrigerant flow and the first regeneration refrigerant flow are shown in the form of a flowchart, and in FIG. 11, the third main refrigerant flow and the second regeneration refrigerant flow in the third air conditioning unit (U3) are shown in the form of a flowchart. there is.

먼저 도 8과 도 9를 참조하여 제2공조모드일 때 상기 제1공조유닛(U1)에서 제1메인냉매의 흐름을 보면, 상기 제1실외압축기(110)가 제1메인냉매를 압축하여, 고온/고압의 냉매를 제1압축기 토출관(L101)으로 토출한다. 토출된 고온/고압의 제1메인냉매는 모두 상기 제2실내열교환기(425)로 전달된다. 즉, 상기 제2실내열교환기(425)가 응축기로 사용될 수 있다. 그리고, 제2공조모드의 제1공조유닛(U1)에서는 상기 제1실외열교환기(130), 상기 제1회수열교환기(410) 및 상기 제1실내열교환기(421)가 각각 증발기가 될 수 있다. First, looking at the flow of the first main refrigerant in the first air conditioning unit (U1) in the second air conditioning mode with reference to FIGS. 8 and 9, the first outdoor compressor 110 compresses the first main refrigerant, High-temperature/high-pressure refrigerant is discharged through the first compressor discharge pipe (L101). All of the discharged high-temperature/high-pressure first main refrigerant is transferred to the second indoor heat exchanger (425). That is, the second indoor heat exchanger 425 can be used as a condenser. And, in the first air conditioning unit (U1) in the second air conditioning mode, the first outdoor heat exchanger 130, the first recovery heat exchanger 410, and the first indoor heat exchanger 421 can each serve as an evaporator. there is.

이때, 상기 제2실내열교환기(425)로 제1메인냉매가 흐르는 경로는 제1고압관이 될 수 있다. 여기서 제1고압관은 상기 제1압축기 토출관(L101)-제1-1실외기 연결관(L103)-제1-2분배 연결관(L119)이 될 수 있다. 이때, 상기 제1-1실외기 연결관(L103)과 상기 제1-2분배 연결관(L119)의 사이에는 상기 제1전달모듈(500)의 제1냉매분배밸브(510)가 배치되고, 상기 제1냉매분배밸브(510)가 이들을 연결해줄 수 있다. 참고로, 이때 상기 제1메인실외밸브(150)는 OFF상태이고, 상기 제1서브실외밸브(160)는 ON상태가 될 수 있다. At this time, the path through which the first main refrigerant flows to the second indoor heat exchanger 425 may be the first high pressure pipe. Here, the first high pressure pipe may be the first compressor discharge pipe (L101), the 1-1 outdoor unit connection pipe (L103), and the 1-2 distribution connection pipe (L119). At this time, the first refrigerant distribution valve 510 of the first delivery module 500 is disposed between the 1-1 outdoor unit connection pipe (L103) and the 1-2 distribution connection pipe (L119), The first refrigerant distribution valve 510 can connect them. For reference, at this time, the first main outdoor valve 150 may be in the OFF state, and the first sub-outdoor valve 160 may be in the ON state.

상기 제2실내열교환기(425)에서 응축된 제1메인냉매는 중온/고압의 상태가 되어, 상기 제1실외열교환기(130), 상기 제1회수열교환기(410) 및 상기 제1실내열교환기(421)에 각각 전달될 수 있다. 이때, 상기 제1실외열교환기(130), 상기 제1회수열교환기(410) 및 상기 제1실내열교환기(421)로 유동하는 제1메인냉매의 경로는 제1액관이 될 수 있다. 구체적으로는, (i) 상기 제1-2열교환 연결관(L123)-제1-2실외열교환 연결관(L121)은 상기 제1실외열교환기(130)로 제1메인냉매가 유동하는 제1액관이 되고, (ii) 상기 제1실내 분기관(L125)-제1실내기 연결관(L128)은 상기 제1회수열교환기(410)로 제1메인냉매가 유동하는 제1액관이 되며, (iii) 상기 제1실내 분기관(L125)-제1-1실내열교환 연결관(L124)은 상기 제1실내열교환기(421)로 제1메인냉매가 유동하는 제1액관이 된다. The first main refrigerant condensed in the second indoor heat exchanger (425) is in a medium temperature/high pressure state, and the first outdoor heat exchanger (130), the first recovery heat exchanger (410), and the first indoor heat exchanger It may be transmitted to each group 421. At this time, the path of the first main refrigerant flowing to the first outdoor heat exchanger 130, the first recovery heat exchanger 410, and the first indoor heat exchanger 421 may be the first liquid pipe. Specifically, (i) the 1-2 heat exchange connection pipe (L123) - the 1-2 outdoor heat exchange connection pipe (L121) is the first heat exchanger through which the first main refrigerant flows to the first outdoor heat exchanger (130). It becomes a liquid pipe, and (ii) the first indoor branch pipe (L125) - first indoor unit connection pipe (L128) becomes a first liquid pipe through which the first main refrigerant flows to the first recovery heat exchanger (410), ( iii) The first indoor branch pipe (L125)-1-1 indoor heat exchange connection pipe (L124) becomes the first liquid pipe through which the first main refrigerant flows to the first indoor heat exchanger (421).

(i) 상기 제1-2실외열교환 연결관(L121)에는 상기 제1실외팽창변(135)이 배치되어, 제1메인냉매는 상기 제1실외팽창변(135)에서 팽창된 상태로 증발기인 상기 제1실외열교환기(130)로 유동될 수 있다. (ii) 제1열회수 연결관(L127)에는 상기 제1열회수팽창변(415)이 배치되어, 제1메인냉매는 상기 제1회수팽창변에서 팽창된 상태로 증발기인 상기 제1회수열교환기(410)로 유동될 수 있다. (iii) 상기 제1-1실내열교환 연결관(L124)에는 상기 제1실내팽창변(423)이 배치되어, 제1메인냉매는 상기 제1실내팽창변(423)에서 팽창된 상태로 증발기인 상기 제1실내열교환기(421)로 유동될 수 있다. (i) The first outdoor expansion valve 135 is disposed in the first-second outdoor heat exchange connection pipe (L121), and the first main refrigerant is expanded in the first outdoor expansion valve 135 and the first main refrigerant is an evaporator. 1It can flow to the outdoor heat exchanger (130). (ii) The first heat recovery expansion valve 415 is disposed in the first heat recovery connection pipe (L127), and the first main refrigerant is expanded in the first recovery expansion valve to the first recovery heat exchanger 410, which is an evaporator. can flow. (iii) The first indoor expansion valve 423 is disposed in the 1-1 indoor heat exchange connection pipe (L124), and the first main refrigerant is expanded in the first indoor expansion valve 423 and the first main refrigerant is an evaporator. 1It can flow to the indoor heat exchanger (421).

상기 제1실내열교환기(421)는 증발기가 되므로, 상기 실내덕트(S) 내부의 공기를 냉각/제습할 수 있다. 상기 제1실내열교환기(421)를 지나면서 1차로 냉각/제습된 외기(OA)는 상기 제2실내열교환기(425)를 지나면서 어느 정도 가열될 수 있다. 도 9에서, 외기(OA)가 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)를 지나는 방향(K1)이 굵은 화살표로 표현되어 있다. Since the first indoor heat exchanger 421 functions as an evaporator, it can cool/dehumidify the air inside the indoor duct (S). The outdoor air (OA) that is primarily cooled/dehumidified while passing through the first indoor heat exchanger 421 may be heated to some extent while passing through the second indoor heat exchanger 425. In FIG. 9, the direction K1 in which the outside air (OA) passes through the first indoor heat exchanger 421 and the second indoor heat exchanger 425 is indicated by a thick arrow.

상기 제1실외열교환기(130), 상기 제1회수열교환기(410) 및 상기 제1실내열교환기(421)에는 서로 다른 비율로 냉매가 공급될 수 있다. 예를 들어, 상기 제2실내열교환기(425)에서 응축된 제1메인냉매의 유량은 제1회수열교환기(410)>제1실내열교환기(421)>제1실외열교환기(130) 순으로 전달될 수 있다. 본 실시례에서 상기 제2실내열교환기(425)에서 응축된 제1메인냉매 중 50% 이상이 상기 제1회수열교환기(410)에 전달될 수 있다. Refrigerant may be supplied to the first outdoor heat exchanger 130, the first recovery heat exchanger 410, and the first indoor heat exchanger 421 at different ratios. For example, the flow rate of the first main refrigerant condensed in the second indoor heat exchanger (425) is in the following order: first recovery heat exchanger (410) > first indoor heat exchanger (421) > first outdoor heat exchanger (130). can be passed on. In this embodiment, more than 50% of the first main refrigerant condensed in the second indoor heat exchanger (425) may be transferred to the first recovery heat exchanger (410).

이때, 상기 1차실내열교환기(420)에 의해 1차 및 2차 제습된 외기(OA)는 계속 유동하면서 상기 제습로터(460)를 거치면서 3차로 제습되고, 마지막으로 상기 제3실내열교환기(430)와 제4실내열교환기(435)에 의해 4차 및 5차로 제습되어 급기(SA)가 되고, 상기 급기구(G3)를 통해 실내공간으로 공급될 수 있다. 상기 3차 내지 5차 제습 구조는 아래에서 다시 설명하기로 한다. At this time, the outdoor air (OA) that has been first and secondarily dehumidified by the primary indoor heat exchanger 420 continues to flow and is dehumidified thirdly while passing through the dehumidifying rotor 460, and finally, the third indoor heat exchanger ( It is dehumidified in the 4th and 5th stages by the 430) and the fourth indoor heat exchanger 435 to become supply air (SA), and can be supplied to the indoor space through the supply opening (G3). The third to fifth dehumidification structures will be described again below.

상기 제1실내열교환기(421)에서 배출된 저온/저압의 제1메인냉매는 제1열교환 유도관(L117)을 거쳐 상기 제1전달모듈(500)에 유입되고, 상기 제1전달모듈(500)의 내부에서 제1열교환 연결관(L116)을 통해 상기 제1냉매열교환기(530)에 전달될 수 있다. 그리고, 제1메인냉매는 제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)을 통해 상기 제1어큐뮬레이터(120)로 공급된 후에, 제1압축기 흡입관(L115)을 통해 다시 제1실외압축기(110)로 흡입될 수 있다. 따라서 상기 제1열교환 유도관(L117)-제1열교환 연결관(L116)-제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)은 제1저압관이 될 수 있다.The low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 flows into the first transfer module 500 through the first heat exchange induction pipe (L117), and the first transfer module 500 ) can be transmitted to the first refrigerant heat exchanger 530 through the first heat exchange connection pipe (L116). And, the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110. Therefore, the first heat exchange induction pipe (L117) - the first heat exchange connection pipe (L116) - the first accumulator connection pipe (L111) - the first accumulator suction pipe (L113) may be the first low pressure pipe.

상기 제1회수열교환기(410)에서 배출된 저온/저압의 제1메인냉매는 상기 제1열회수 연결관(L127)을 거쳐 상기 제1전달모듈(500)에 유입되고, 상기 제1전달모듈(500)의 내부의 제1냉매분배밸브(510)를 통해 상기 제1냉매열교환기(530)에 합류될 수 있다. 그리고, 제1메인냉매는 제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)을 통해 상기 제1어큐뮬레이터(120)로 공급된 후에, 제1압축기 흡입관(L115)을 통해 다시 제1실외압축기(110)로 흡입될 수 있다.The low-temperature/low-pressure first main refrigerant discharged from the first recovery heat exchanger 410 flows into the first transfer module 500 through the first heat recovery connector (L127), and the first transfer module ( It can be joined to the first refrigerant heat exchanger 530 through the first refrigerant distribution valve 510 inside the 500). And, the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110.

상기 제1실외열교환기(130)에서 배출된 저온/저압의 제1메인냉매는 제1-1실외열교환 연결관(L102)과 제1어큐뮬레이터 흡입관(L113)을 거쳐 상기 제1어큐뮬레이터(120)로 공급된 후에, 제1압축기 흡입관(L115)을 통해 다시 제1실외압축기(110)로 흡입될 수 있다. The low-temperature/low-pressure first main refrigerant discharged from the first outdoor heat exchanger (130) is sent to the first accumulator (120) through the 1-1 outdoor heat exchange connection pipe (L102) and the first accumulator suction pipe (L113). After being supplied, it can be sucked back into the first outdoor compressor 110 through the first compressor suction pipe (L115).

이때, 상기 제1냉매열교환기(530)는 상기 제1실내열교환기(421) 및 제1회수열교환기(410)에서 배출된 저온/저압의 제1메인냉매와, 상기 제2실내열교환기(425)에서 응축된 중온/고압의 제1메인냉매를 서로 열교환시킬 수 있다. 상기 제2실내열교환기(425)에서 응축된 중온/고압의 제1메인냉매는 상기 제1냉매열교환기(530)를 지나면서 상기 제1실내열교환기(421) 및 제1회수열교환기(410)에서 배출된 저온/저압의 제1메인냉매에 방열할 수 있다. 이에 따라 상기 중온/고압의 액상상태의 제1메인냉매는 제1냉매열교환기(530)에 의해 추가적으로 과냉각되어 안정화되거나, 응축기에서 나온 제1메인냉매가 이상(2-phase) 상태인 경우 제1냉매열교환기(530)에 의해 액상화된 상태로 상기 제1실외열교환기(130)에 공급될 수 있다. At this time, the first refrigerant heat exchanger 530 is a low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 and the first recovery heat exchanger 410, and the second indoor heat exchanger ( The medium temperature/high pressure first main refrigerant condensed in 425) can be heat exchanged with each other. The medium-temperature/high-pressure first main refrigerant condensed in the second indoor heat exchanger (425) passes through the first refrigerant heat exchanger (530) and the first indoor heat exchanger (421) and the first recovery heat exchanger (410). ) can radiate heat to the low-temperature/low-pressure first main refrigerant discharged from ). Accordingly, the first main refrigerant in the medium temperature/high pressure liquid state is additionally supercooled and stabilized by the first refrigerant heat exchanger 530, or if the first main refrigerant from the condenser is in a two-phase state, the first main refrigerant is in a two-phase state. It can be supplied to the first outdoor heat exchanger (130) in a liquefied state by the refrigerant heat exchanger (530).

앞서 증발기로 동작되는 상기 제1회수열교환기(410)를 보면, 상기 제1회수열교환기(410)의 제1메인냉매는 증발하면서 배기(EA)로부터 흡열할 수 있다. 즉, 상기 제1회수열교환기(410)의 제1메인냉매는 상기 제1배기구(G5)를 통해 배출되는 배기(EA)와 열교환하면서 배기(EA)로부터 흡열할 수 있는 것이다. 도 9에서, 환기(RA)가 상기 제1회수열교환기(410)를 지나고, 상기 제1회수열교환기(410)의 냉매가 상기 배기(EA)로부터 흡열하는 모습이 굵은 화살표로 표현되어 있다. Looking at the first recovery heat exchanger 410, which operates as an evaporator, the first main refrigerant of the first recovery heat exchanger 410 can absorb heat from the exhaust EA while evaporating. That is, the first main refrigerant of the first recovery heat exchanger 410 can absorb heat from the exhaust EA while exchanging heat with the exhaust EA discharged through the first exhaust port G5. In FIG. 9, the ventilation (RA) passing through the first recovery heat exchanger (410) and the refrigerant of the first recovery heat exchanger (410) absorbing heat from the exhaust (EA) are represented by thick arrows.

이때, 상기 제1회수열교환기(410)로 공급되는 공기 중 일부는 실내공간에서 흡입된 환기(RA)로, 외부의 기온 보다 높은 온도를 갖는다. 이처럼 상기 제1회수열교환기(410)와 열교환하는 공기는 외부의 공기 보다 온도가 높기 때문에, 상기 제1회수열교환기(410)의 제1메인냉매가 외부의 공기에서 흡열하는 것 보다 상기 환기(RA)로부터 흡열하는 것이 효과적이다. 즉, 배기(EA)의 폐열을 이용하여 제1회수열교환기(410)의 제1메인냉매가 보다 효과적으로 흡열할 수 있는 것이다. 따라서, 상기 제1회수열교환기(410)에 의한 증발열량이 커지고, 상기 제1공조유닛(U1)의 냉동사이클은 운전 저압이 높아져 효율이 향상될 수 있다. At this time, some of the air supplied to the first recovery heat exchanger 410 is ventilation (RA) drawn from the indoor space and has a temperature higher than the outside air temperature. In this way, since the air that exchanges heat with the first recovery heat exchanger (410) has a higher temperature than the outside air, the first main refrigerant of the first recovery heat exchanger (410) absorbs heat from the outside air rather than the ventilation ( It is effective to absorb heat from RA). In other words, the first main refrigerant of the first recovery heat exchanger 410 can absorb heat more effectively by using the waste heat of the exhaust (EA). Accordingly, the amount of evaporative heat generated by the first recovery heat exchanger 410 increases, and the low operating pressure of the refrigeration cycle of the first air conditioning unit (U1) increases, thereby improving efficiency.

이어서, 도 8과 도 10을 참조하여 제2공조모드일 때 상기 제2공조유닛(U2)에서 제2메인냉매의 흐름을 보면, 상기 제2실외압축기(210)가 제2메인냉매를 압축하여, 고온/고압의 제2메인냉매를 제2압축기 토출관(L201)으로 토출한다. 토출된 고온/고압의 제2메인냉매 전체는 상기 제2전달모듈(600)을 거쳐 상기 제1열교환모듈(700)의 제1모듈열교환기(730)로 전달된다. 상기 제1모듈열교환기(730)는 상기 제2메인냉매사이클의 응축기가 될 수 있다. Next, looking at the flow of the second main refrigerant in the second air conditioning unit (U2) in the second air conditioning mode with reference to FIGS. 8 and 10, the second outdoor compressor 210 compresses the second main refrigerant , the high-temperature/high-pressure second main refrigerant is discharged to the second compressor discharge pipe (L201). The entire discharged high-temperature/high-pressure second main refrigerant is transferred to the first module heat exchanger 730 of the first heat exchange module 700 through the second transfer module 600. The first module heat exchanger 730 may be a condenser of the second main refrigerant cycle.

이때, 상기 제1열교환모듈(700)로 냉매가 흐르는 경로는 제2고압관이 될 수 있다. 여기서 제2고압관은 상기 제2압축기 토출관(L201)-제2-1실외기 연결관(L203)-제2-1분배 연결관(L205)이 될 수 있다. 이때, 상기 제2-1실외기 연결관(L203)과 상기 제2-1분배 연결관(L205)의 사이에는 상기 제2전달모듈(600)의 제2냉매분배밸브(610)가 배치되고, 상기 제2냉매분배밸브(610)가 이들을 연결해줄 수 있다. 참고로, 이때 상기 제2메인실외밸브(250)와 상기 제2서브실외밸브(260)는 OFF상태로 볼 수 있다. At this time, the path through which the refrigerant flows to the first heat exchange module 700 may be the second high pressure pipe. Here, the second high pressure pipe may be the second compressor discharge pipe (L201) - the 2-1 outdoor unit connection pipe (L203) - the 2-1 distribution connection pipe (L205). At this time, the second refrigerant distribution valve 610 of the second delivery module 600 is disposed between the 2-1 outdoor unit connection pipe (L203) and the 2-1 distribution connection pipe (L205), The second refrigerant distribution valve 610 can connect them. For reference, at this time, the second main outdoor valve 250 and the second sub-outdoor valve 260 can be viewed as OFF.

상기 제2메인냉매가 상기 제1모듈열교환기(730)를 거치는 과정에서, 상기 제2메인냉매는 제1모듈열교환기(730)를 유동하는 제1재생냉매와 열교환할 수 있다. 앞서 설명한 바와 같이, 상기 제1재생열교환기(450)는 상기 제1열교환모듈(700)과 함께 제1재생냉매를 유동시키는 별도의 제1재생냉매사이클을 구성할 수 있다. 여기서, 응축기로 동작되는 상기 제1재생열교환기(450)에서 발생된 열은 상기 제습로터(460)에 전달될 수 있다. 상기 제2외기구(G2)로 유입된 공기와, 상기 제2바이패스(B2)를 통해 전달된 공기, 그리고 상기 제2재생열교환기(470)를 지난 공기는 상기 제1재생열교환기(450)를 지나면서 열교환되어 온도가 더욱 상승할 수 있다. As the second main refrigerant passes through the first module heat exchanger (730), the second main refrigerant may exchange heat with the first regenerated refrigerant flowing through the first module heat exchanger (730). As described above, the first regenerative heat exchanger 450, together with the first heat exchange module 700, may form a separate first regenerative refrigerant cycle that flows the first regenerative refrigerant. Here, heat generated in the first regenerative heat exchanger 450, which operates as a condenser, may be transferred to the dehumidification rotor 460. The air introduced into the second external mechanism (G2), the air delivered through the second bypass (B2), and the air passing through the second regenerative heat exchanger (470) are transferred to the first regenerative heat exchanger (450). ), heat exchange occurs and the temperature may rise further.

그리고, 이렇게 가열된 공기가 상기 제습로터(460)로 전달되어 제습로터(460)를 재생시킬 수 있다. 따라서, 제습로터(460)의 재생을 위한 재생히터(465)의 사용량이 줄어들 수 있고, 결과적으로 제2공조유닛(U2)을 구동하기 위한 소비전력이 줄어들 수 있다. 도 10에서, 상기 제1재생열교환기(450)에서 방열된 공기가 상기 제습로터(460)를 지나는 모습이 굵은 화살표로 표현되어 있다. And, the heated air can be delivered to the dehumidification rotor 460 to regenerate the dehumidification rotor 460. Accordingly, the amount of use of the regeneration heater 465 for regeneration of the dehumidification rotor 460 can be reduced, and as a result, the power consumption for driving the second air conditioning unit (U2) can be reduced. In Figure 10, the air radiated from the first regenerative heat exchanger 450 passing through the dehumidifying rotor 460 is represented by a thick arrow.

동시에, 상기 제1열교환모듈(700)과 상기 제1재생열교환기(450)로 구성된 제1재생냉매사이클에는 제1재생냉매가 흐를 수 있다. 상기 제1모듈압축기(710)는 압축한 고온/고압의 제1재생냉매를 제1모듈압축기(710) 토출관(L245)으로 토출한다. 토출된 고온/고압의 제1재생냉매는 상기 제1재생열교환기(450)로 전달되고, 상기 제1재생열교환기(450)는 제1재생냉매를 응축할 수 있다. At the same time, the first regenerative refrigerant may flow through the first regenerative refrigerant cycle composed of the first heat exchange module 700 and the first regenerative heat exchanger 450. The first module compressor 710 discharges the compressed high-temperature/high-pressure first regenerative refrigerant to the discharge pipe L245 of the first module compressor 710. The discharged high-temperature/high-pressure first regenerative refrigerant is transferred to the first regenerative heat exchanger 450, and the first regenerative heat exchanger 450 can condense the first regenerative refrigerant.

상기 제1재생열교환기(450)가 제1재생냉매를 응축하는 과정에서 제1재생냉매는 방열하게 되고, 방열 후 제1재생냉매는 중온 고압 액상 냉매로 전환될 수 있다. 그리고, 제1재생냉매는 제1재생열교환 연결관(L247)을 통해 상기 제1모듈팽창변(740)으로 전달되어 팽창된 후에, 제1모듈열교환 연결관(L248)을 통해 상기 제1모듈열교환기(730)로 전달되어 증발될 수 있다. 증발된 제1재생냉매는 상기 제1모듈어큐뮬레이터 흡입관(L241)을 통해서 제1모듈어큐뮬레이터로 전달될 수 있다. In the process of the first regenerative heat exchanger 450 condensing the first regenerative refrigerant, the first regenerative refrigerant radiates heat, and after dissipating heat, the first regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. Then, the first regenerative refrigerant is delivered to the first module expansion valve 740 through the first regenerative heat exchange connection pipe (L247) and expanded, and then through the first module heat exchange connection pipe (L248) to the first module heat exchanger. It may be delivered to (730) and evaporated. The evaporated first regenerated refrigerant may be delivered to the first module accumulator through the first module accumulator suction pipe (L241).

이때, 상기 제1모듈열교환기(730)를 통과하는 제2메인냉매와 제1재생냉매는 서로 열교환될 수 있다. 상기 제2메인냉매는 상기 제1모듈열교환기(730)에서 응축되면서 제1재생냉매에 방열하며 액상으로 전환될 수 있다. 따라서, 제2메인냉매가 보다 효과적으로 방열될 수 있고, 상기 제2공조유닛(U2)의 제2메인냉매사이클은 운전 고압이 낮아져 효율이 향상되고, 소비전력이 줄어들 수 있다. At this time, the second main refrigerant and the first regenerated refrigerant passing through the first module heat exchanger 730 may exchange heat with each other. The second main refrigerant may be condensed in the first module heat exchanger 730, radiating heat to the first regenerated refrigerant, and converted into a liquid phase. Accordingly, the second main refrigerant can dissipate heat more effectively, and the operating high pressure of the second main refrigerant cycle of the second air conditioning unit (U2) is lowered, improving efficiency and reducing power consumption.

반대로, 상기 제1재생냉매는 상기 제1모듈열교환기(730)에서 증발되면서, 상기 제1재생냉매는 상기 제1모듈열교환기(730)를 흐르는 제2메인냉매로부터 흡열할 수 있다. 이때, 상기 제2메인냉매의 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제2공조유닛(U2)을 구성하는 제1재생냉매사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. 특히, 상기 제1재생냉매사이클을 구성하는 상기 제1재생열교환기(450)의 공기 취출온도를 약 80℃ 이상으로 높여, 고온재생형의 제습로터(460)의 재생 에너지로 사용할 수 있다. 이렇게 되면, 효율이 낮은 상기 재생히터(465)의 사용량을 줄여 에너지효율을 더욱 높일 수 있다. Conversely, as the first regenerated refrigerant evaporates in the first module heat exchanger 730, the first regenerated refrigerant may absorb heat from the second main refrigerant flowing through the first module heat exchanger 730. At this time, because the temperature of the second main refrigerant is high, the amount of heat absorption may increase. Accordingly, the operating low pressure of the first regenerative refrigerant cycle constituting the second air conditioning unit (U2) increases, thereby reducing power consumption. In particular, the air blowing temperature of the first regenerative heat exchanger 450, which constitutes the first regenerative refrigerant cycle, can be increased to about 80°C or higher and used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. In this way, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.

이때, 상기 제3공조유닛(U3)을 구성하는 제2재생열교환기(470)를 통과하면서 가열된 공기는 상기 제1재생열교환기(450) 방향(K3)으로 전달될 수 있다. 도 10을 보면, 공기의 흐름이 굵은 화살표로 표현되어 있다. 상기 제1재생열교환기(450) 방향(K3)으로 전달된 공기는 상기 제1재생열교환기(450)에 의해 다시 한번 승온된 상태로 상기 제습로터(460)에 전달될 수 있다. 그리고, 상기 제습로터(460)를 고온으로 재생시킨 공기는 상기 제2회수열교환기(440)로 전달될 수 있다. 상기 제2회수열교환기(440)를 거친 공기는 배기(EA)될 수 있다. At this time, the air heated while passing through the second regenerative heat exchanger 470 constituting the third air conditioning unit (U3) may be transferred in the direction K3 to the first regenerative heat exchanger 450. Looking at Figure 10, the air flow is represented by a thick arrow. The air delivered in the direction K3 of the first regenerative heat exchanger 450 may be delivered to the dehumidifying rotor 460 in a state in which its temperature is raised again by the first regenerative heat exchanger 450. In addition, the air regenerated to high temperature by the dehumidification rotor 460 may be delivered to the second recovery heat exchanger 440. Air that has passed through the second recovery heat exchanger 440 may be exhausted (EA).

한편, 상기 제2모듈열교환기(930)를 거치면서 열교환되면서 응축된 제2메인냉매 중 일부는 상기 제2회수열교환기(440)로 전달되어 증발될 수 있고, 나머지 일부는 제2실외열교환기로 전달되어 증발될 수 있다. Meanwhile, part of the second main refrigerant condensed while exchanging heat while passing through the second module heat exchanger 930 may be transferred to the second recovery heat exchanger 440 and evaporated, and the remaining part may be transferred to the second outdoor heat exchanger. It can be transmitted and evaporated.

상기 제1모듈열교환기(730)에서 응축된 중온/고압의 제2메인냉매는 상기 제2회수열교환기(440)와 제2실외열교환기(230)에서 증발될 수 있다. 이때, 상기 제2회수열교환기(440)와 제2실외열교환기(230)로 유동하는 냉매의 경로는 제2액관이 될 수 있다. The medium-temperature/high-pressure second main refrigerant condensed in the first module heat exchanger (730) may be evaporated in the second recovery heat exchanger (440) and the second outdoor heat exchanger (230). At this time, the path of the refrigerant flowing to the second recovery heat exchanger 440 and the second outdoor heat exchanger 230 may be the second liquid pipe.

구체적으로는, 상기 제1메인연결관(L224)은 상기 제2회수열교환기(440)로 제2메인냉매가 유동하는 제2액관이 된다. 또한, 제1모듈연결관(L223)-제2-2실외기 연결관(L222)은 상기 제2실외열교환기(230)로 제2메인냉매가 유동하는 제2액관이 된다. Specifically, the first main connection pipe (L224) becomes a second liquid pipe through which the second main refrigerant flows to the second recovery heat exchanger (440). In addition, the first module connection pipe (L223) - the 2-2 outdoor unit connection pipe (L222) becomes a second liquid pipe through which the second main refrigerant flows to the second outdoor heat exchanger (230).

이때, 상기 제2회수열교환기(440)의 제2메인냉매는 상기 실내기(400)에서 외부로 배출되는 배기(EA)로부터 흡열할 수 있다. 상기 배기(EA)는 외부의 공기 보다 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제2공조유닛(U2)에 의한 냉동사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. At this time, the second main refrigerant of the second recovery heat exchanger (440) may absorb heat from the exhaust (EA) discharged to the outside from the indoor unit (400). Since the exhaust air (EA) has a higher temperature than the outside air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the second air conditioning unit (U2) increases, thereby reducing power consumption.

결과적으로, 상기 제2회수열교환기(440)는 증발기로 동작될 때 배기(EA)의 온도를 활용하므로, 상기 제2공조유닛(U2)의 냉동사이클을 운전하는데 필요한 전력의 소모를 줄이는 기능을 할 수 있다. As a result, the second recovery heat exchanger (440) utilizes the temperature of the exhaust (EA) when operating as an evaporator, thereby reducing the power consumption required to operate the refrigeration cycle of the second air conditioning unit (U2). can do.

상기 제2회수열교환기(440)에서 증발된 저온/저압의 제2메인냉매는 제2열교환 전달관(L217)을 통해 상기 제2전달모듈(600)에 유입될 수 있다. 그리고, 제2열교환 연결관(L216)을 통해 상기 제2냉매열교환기(630)를 지난 제2메인냉매는 상기 제2어큐뮬레이터(220)를 통해 상기 제2실외압축기(210)에 흡입될 수 있다. 따라서 상기 제2열교환 전달관(L217)-상기 제2열교환 연결관(L216)-제2어큐뮬레이터 연결관(L211)-제2어큐뮬레이터 흡입관(L213)은 제2저압관이 될 수 있다. The low-temperature/low-pressure second main refrigerant evaporated in the second recovery heat exchanger 440 may flow into the second transfer module 600 through the second heat exchange transfer pipe (L217). In addition, the second main refrigerant that has passed through the second refrigerant heat exchanger 630 through the second heat exchange connector (L216) can be sucked into the second outdoor compressor 210 through the second accumulator 220. . Therefore, the second heat exchange transmission pipe (L217) - the second heat exchange connection pipe (L216) - the second accumulator connection pipe (L211) - the second accumulator suction pipe (L213) may be the second low pressure pipe.

한편, 상기 제2실내열교환기(425)를 통과한 공기는 상기 제습로터(460) 방향(K1)으로 유동하여 상기 제습로터(460)를 통과하면서 제습될 수 있다. 이렇게 제습된 공기는 상기 제3실내열교환기(430) 방향(K2)으로 전달될 수 있다. 도 8과 도 10에서, 공기가 상기 제습로터(460)를 통과하는 모습이 굵은 화살표로 표현되어 있다.Meanwhile, the air that has passed through the second indoor heat exchanger 425 may flow in the direction K1 of the dehumidifying rotor 460 and be dehumidified while passing through the dehumidifying rotor 460. The air dehumidified in this way can be delivered in the direction K2 to the third indoor heat exchanger 430. In FIGS. 8 and 10, the air passing through the dehumidifying rotor 460 is represented by a thick arrow.

이때, 상기 제습로터(460)의 일부는 상기 실내덕트(S)의 내부에서 공기의 유동방향을 따라 배치될 수 있다. 따라서, 상기 제습로터(460)는 앞서 제1실내열교환기(421)와 제2실내열교환기(425)를 거친 외기(OA)를 다시 제습하므로, 총 3차에 걸쳐 연속적인 제습이 이루어지면서 외기(OA)의 습도를 매우 낮게 낮출 수 있다. At this time, a part of the dehumidifying rotor 460 may be disposed along the air flow direction inside the indoor duct (S). Accordingly, the dehumidification rotor 460 re-dehumidifies the outdoor air (OA) that previously passed through the first indoor heat exchanger 421 and the second indoor heat exchanger 425, so that continuous dehumidification is performed a total of three times to maintain the outdoor air. The humidity of (OA) can be lowered to a very low level.

이어서, 도 8과 도 11을 참조하여 제2공조모드일 때, 상기 제3공조유닛(U3)에서 제3메인냉매의 흐름을 보면, 상기 제3실외압축기(310)가 제3메인냉매를 압축하여, 고온/고압의 제3메인냉매를 제3압축기 토출관(L301)으로 토출한다. 토출된 고온/고압의 제3메인냉매 전부는 상기 제3전달모듈(800)을 통해 제2모듈열교환기(930)로 전달되고, 상기 제2모듈열교환기(930)가 응축기로 사용될 수 있다. Next, looking at the flow of the third main refrigerant in the third air conditioning unit (U3) in the second air conditioning mode with reference to FIGS. 8 and 11, the third outdoor compressor 310 compresses the third main refrigerant. Thus, the high-temperature/high-pressure third main refrigerant is discharged to the third compressor discharge pipe (L301). All of the discharged high-temperature/high-pressure third main refrigerant is transferred to the second module heat exchanger 930 through the third transfer module 800, and the second module heat exchanger 930 can be used as a condenser.

이때, 상기 제2모듈열교환기(930)로 제3메인냉매가 흐르는 경로는 제2고압관이 될 수 있다. 여기서 제2고압관은 상기 제3압축기 토출관(L301)-제3-1실외기 연결관(L303)-제3-1분배 연결관(L305)이 될 수 있다. 이때, 상기 제3-1실외기 연결관(L303)과 상기 제3-1분배 연결관(L305)의 사이에는 상기 제3전달모듈(800)의 제3냉매분배밸브(810)가 배치되고, 상기 제3냉매분배밸브(810)가 이들을 연결해줄 수 있다. At this time, the path through which the third main refrigerant flows to the second module heat exchanger 930 may be the second high pressure pipe. Here, the second high pressure pipe may be the third compressor discharge pipe (L301) - the 3-1 outdoor unit connection pipe (L303) - the 3-1 distribution connection pipe (L305). At this time, the third refrigerant distribution valve 810 of the third delivery module 800 is disposed between the 3-1 outdoor unit connection pipe (L303) and the 3-1 distribution connection pipe (L305), The third refrigerant distribution valve 810 can connect them.

상기 제2모듈열교환기(930)에서 응축된 제3메인냉매는 중온/고압의 상태가 되어, 상기 제3실외열교환기(330), 상기 제3실내열교환기(430) 및 제4실내열교환기(435)에 전달될 수 있다. The third main refrigerant condensed in the second module heat exchanger (930) is in a medium temperature/high pressure state, and the third outdoor heat exchanger (330), the third indoor heat exchanger (430), and the fourth indoor heat exchanger It can be sent to (435).

이때, 상기 제3냉매열교환기(830)에는 제3 및 제4실내열교환기(430, 435)에서 증발된 저온/저압의 제3메인냉매가 흐르고 있다. 따라서, 앞서 상기 제2모듈열교환기(930)에 의해 응축된 중온/고압의 제3메인냉매는 상기 제3냉매열교환기(830)를 지날 때 상기 저온/저압의 제3메인냉매에 방열(열교환)하여 액상 냉매로 전환된 후, 상기 제3실외열교환기(330)로 전달될 수 있다. At this time, the low-temperature/low-pressure third main refrigerant evaporated from the third and fourth indoor heat exchangers (430, 435) is flowing through the third refrigerant heat exchanger (830). Therefore, the medium-temperature/high-pressure third main refrigerant previously condensed by the second module heat exchanger 930 radiates heat (heat exchange) to the low-temperature/low-pressure third main refrigerant when passing through the third refrigerant heat exchanger 830. ) and then converted into liquid refrigerant, it can be delivered to the third outdoor heat exchanger (330).

상기 제3실내열교환기(430)와 제4실내열교환기(435)로 유동하는 제3메인냉매의 경로와, 상기 제3실외열교환기(330)로 유동하는 제3메인냉매의 경로는 제3액관이 될 수 있다. 구체적으로는, 상기 제4열교환 전달관(L324)은 상기 제3실내열교환기(430)와 제4실내열교환기(435)로 냉매가 유동하는 제3액관이 된다. 또한, 상기 제2메인연결관(L323)-제3-2실외기 연결관(L322)은 상기 제3실내열교환기(430)로 냉매가 유동하는 제3액관이 된다. The path of the third main refrigerant flowing into the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the path of the third main refrigerant flowing into the third outdoor heat exchanger 330 are the third It can be a liquid pipe. Specifically, the fourth heat exchange transmission pipe (L324) becomes a third liquid pipe through which refrigerant flows to the third indoor heat exchanger (430) and the fourth indoor heat exchanger (435). In addition, the second main connection pipe (L323) - the 3-2 outdoor unit connection pipe (L322) becomes a third liquid pipe through which refrigerant flows to the third indoor heat exchanger (430).

본 실시례에서, 상기 제1실내열교환기(421), 상기 제2실내열교환기(425), 상기 제습로터(460)의 일부와 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 상기 실내덕트(S)의 내부에서 공기의 유동방향을 따라 서로 연속되게 배치될 수 있다. 따라서, 상기 제1실내열교환기(421), 상기 제2실내열교환기(425), 상기 제습로터(460)의 일부와 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 외기(OA)를 총 5차에 걸쳐 연속적으로 제습하면서 외기(OA)의 습도를 크게 낮출 수 있다. In this embodiment, the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidification rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger ( 435) may be arranged continuously along the air flow direction inside the indoor duct (S). Accordingly, the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidification rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are The humidity of the outdoor air (OA) can be greatly reduced by continuously dehumidifying the outdoor air (OA) a total of five times.

상기 제3실내열교환기(430)에서 배출된 저온/저압의 제3메인냉매는 제3열교환 전달관(L317)을 거쳐 상기 제3전달모듈(800)에 유입되고, 상기 제3전달모듈(800)의 내부에서 제3열교환 연결관(L316)을 통해 상기 제3냉매열교환기(830)에 전달될 수 있다. 동시에, 상기 제4실내열교환기(435)에서 배출된 저온/저압의 제3메인냉매는 제3-2분배 연결관(L319)을 거쳐 상기 제3전달모듈(800)에 유입되고, 상기 제3전달모듈(800)의 내부에서 제3냉매분배밸브(810)을 경유하여 상기 제3냉매열교환기(830)에 전달될 수 있다.The low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 flows into the third transfer module 800 through the third heat exchange transfer pipe (L317), and the third transfer module 800 ) can be transmitted to the third refrigerant heat exchanger (830) through the third heat exchange connection pipe (L316). At the same time, the low-temperature/low-pressure third main refrigerant discharged from the fourth indoor heat exchanger (435) flows into the third transfer module (800) through the third-2 distribution connector (L319), and the third main refrigerant is discharged from the fourth indoor heat exchanger (435). Inside the transfer module 800, the refrigerant may be transferred to the third refrigerant heat exchanger 830 via the third refrigerant distribution valve 810.

그리고, 상기 제3냉매열교환기(830)를 통과한 제3메인냉매는 제3어큐뮬레이터 연결관(L311)-제3어큐뮬레이터 흡입관(L313)을 통해 상기 제3어큐뮬레이터(420)로 공급된 후에, 제3압축기 흡입관(L315)을 통해 다시 제3실외압축기(310)로 흡입될 수 있다. 따라서 상기 제3-2분배 연결관(L319)-제3열교환 연결관(L316)-제3어큐뮬레이터 연결관(L311)-제3어큐뮬레이터 흡입관(L313)은 제3저압관이 될 수 있다. 또한, 상기 제3실외열교환기(330)를 통과하는 제3-2실외열교환 연결관(L321)과, 제3-1실외열교환 연결관(L302) 또한 제3저압관이 될 수 있다. And, the third main refrigerant that has passed through the third refrigerant heat exchanger (830) is supplied to the third accumulator (420) through the third accumulator connection pipe (L311) and the third accumulator suction pipe (L313). It can be sucked back into the third outdoor compressor (310) through the third compressor suction pipe (L315). Therefore, the 3-2 distribution connection pipe (L319) - the 3rd heat exchange connection pipe (L316) - the 3rd accumulator connection pipe (L311) - the 3rd accumulator suction pipe (L313) can be a third low pressure pipe. In addition, the 3-2 outdoor heat exchange connection pipe (L321) and the 3-1 outdoor heat exchange connection pipe (L302) passing through the third outdoor heat exchanger (330) may also serve as third low-pressure pipes.

이때, 상기 제3냉매열교환기(830)는 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 배출된 저온/저압의 제3메인냉매와, 상기 제2모듈열교환기(930)에서 응축된 중온/고압의 액상의 제3메인냉매를 서로 열교환시킬 수 있다. 상기 상기 제2모듈열교환기(930)에서 응축된 중온/고압의 제3메인냉매는 상기 제3냉매열교환기(830)를 지나면서 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 배출된 저온/저압의 냉매에 방열할 수 있다. 이에 따라 상기 중온/고압의 제3메인냉매는 액상냉매의 상태로 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에 공급될 수 있다. At this time, the third refrigerant heat exchanger 830 is a low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the second module heat exchanger. The medium temperature/high pressure liquid third main refrigerant condensed in (930) can be heat exchanged with each other. The medium-temperature/high-pressure third main refrigerant condensed in the second module heat exchanger 930 passes through the third refrigerant heat exchanger 830 and is transferred to the third indoor heat exchanger 430 and the fourth indoor heat exchanger ( Heat can be dissipated in the low temperature/low pressure refrigerant discharged from 435). Accordingly, the third main refrigerant of medium temperature/high pressure can be supplied to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 in the state of a liquid refrigerant.

동시에, 상기 제2열교환모듈(900)과 상기 제2재생열교환기(470)로 구성된 제2재생냉매사이클에는 제2재생냉매가 흐를 수 있다. 상기 제2모듈압축기(910)는 압축한 고온/고압의 제2재생냉매를 제2모듈압축기(910) 토출관(L345)으로 토출한다. 토출된 고온/고압의 제2재생냉매는 상기 제2재생열교환기(470)로 전달되고, 상기 제2재생열교환기(470)는 제2재생냉매를 응축할 수 있다. At the same time, the second regenerative refrigerant may flow through the second regenerative refrigerant cycle composed of the second heat exchange module 900 and the second regenerative heat exchanger 470. The second module compressor 910 discharges the compressed high-temperature/high-pressure second regenerative refrigerant to the discharge pipe L345 of the second module compressor 910. The discharged high-temperature/high-pressure second regenerative refrigerant is transferred to the second regenerative heat exchanger 470, and the second regenerative heat exchanger 470 can condense the second regenerative refrigerant.

상기 제2재생열교환기(470)가 제2재생냉매를 응축하는 과정에서 제2재생냉매는 방열하게 되고, 방열 후 제2재생냉매는 중온 고압 액상 냉매로 전환될 수 있다. 그리고, 제2재생냉매는 제2재생열교환 연결관(L347)을 통해 상기 제2모듈팽창변(940)으로 전달되어 팽창된 후에, 상기 제2모듈열교환기(930)로 전달되어 증발될 수 있다. 증발된 제2재생냉매는 상기 제2모듈어큐뮬레이터 흡입관(L341)을 통해서 제2모듈어큐뮬레이터로 전달될 수 있다. In the process of condensing the second regenerative refrigerant by the second regenerative heat exchanger 470, the second regenerative refrigerant radiates heat, and after dissipating heat, the second regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. In addition, the second regenerative refrigerant may be transferred to the second module expansion valve 940 through the second regenerative heat exchange connection pipe L347 and expanded, and then transferred to the second module heat exchanger 930 to be evaporated. The evaporated second regenerated refrigerant may be delivered to the second module accumulator through the second module accumulator suction pipe (L341).

이때, 상기 제2모듈열교환기(930)를 통과하는 제3메인냉매와 제2재생냉매는 서로 열교환될 수 있다. 상기 제3메인냉매는 상기 제2모듈열교환기(930)에서 응축되면서 제2재생냉매에 방열하며 액상으로 전환될 수 있다. 따라서, 제3메인냉매가 보다 효과적으로 방열될 수 있고, 상기 제3공조유닛(U3)의 제3메인냉매사이클은 운전 고압이 낮아져 효율이 향상되고, 소비전력이 줄어들 수 있다. At this time, the third main refrigerant and the second regenerative refrigerant passing through the second module heat exchanger 930 may exchange heat with each other. The third main refrigerant may be condensed in the second module heat exchanger 930, radiating heat to the second regenerated refrigerant, and converted into a liquid phase. Accordingly, the third main refrigerant can dissipate heat more effectively, and the operating high pressure of the third main refrigerant cycle of the third air conditioning unit (U3) is lowered, improving efficiency and reducing power consumption.

반대로, 상기 제2재생냉매는 상기 제2모듈열교환기(930)에서 증발되면서, 상기 제2재생냉매는 상기 제2모듈열교환기(930)를 흐르는 제3메인냉매로부터 흡열할 수 있다. 이때, 상기 제3메인냉매의 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제3공조유닛(U3)을 구성하는 제2재생냉매사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. 상기 제2재생냉매사이클을 구성하는 상기 제2재생열교환기(470)의 공기 취출온도를 약 50℃ 이상으로 높여, 상기 제1재생열교환기(450) 방향(K3)으로 전달할 수 있다. 이렇게 전달된 공기는 고온재생형의 제습로터(460)의 재생 에너지로 사용할 수 있다. 따라서, 효율이 낮은 상기 재생히터(465)의 사용량을 줄여 에너지효율을 더욱 높일 수 있다. Conversely, as the second regenerated refrigerant evaporates in the second module heat exchanger 930, the second regenerated refrigerant can absorb heat from the third main refrigerant flowing through the second module heat exchanger 930. At this time, because the temperature of the third main refrigerant is high, the amount of heat absorption may increase. Accordingly, the operating low pressure of the second regenerative refrigerant cycle constituting the third air conditioning unit (U3) increases, thereby reducing power consumption. The air blowing temperature of the second regenerative heat exchanger 470, which constitutes the second regenerative refrigerant cycle, can be increased to about 50°C or higher and delivered in the direction K3 to the first regenerative heat exchanger 450. The air delivered in this way can be used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. Therefore, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.

특히, 제3메인냉매는 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 증발하면서 공기를 냉각/제습하게 되는데, 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)를 증발시키기 위해 상기 제2모듈열교환기(930)는 제3메인냉매를 응축시키면서 방열해야 한다. 이 과정에서 발생하는 방열에너지를 제2재생냉매사이클이 흡수하여, 상기 제2재새열교환기가 방열할 때 발생하는 공기 취출온도를 더욱 높일 수 있다. 이에 따라, 상기 제습히터(365)의 사용량을 더욱 줄일 수 있다. In particular, the third main refrigerant cools/dehumidifies the air while evaporating in the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435. In order to evaporate the indoor heat exchanger 435, the second module heat exchanger 930 must dissipate heat while condensing the third main refrigerant. The second regenerative refrigerant cycle absorbs the heat dissipation energy generated in this process, and the air discharge temperature generated when the second regenerative heat exchanger dissipates heat can be further increased. Accordingly, the amount of use of the dehumidification heater 365 can be further reduced.

도 11을 보면, 외부에서 흡입된 외기(OA)는 상기 제3공조유닛(U3)을 구성하는 제2재생열교환기(470)를 통과하면서 가열되고, 가열된 공기는 상기 제1재생열교환기(450) 방향(K3)으로 전달될 수 있다. 또한, 앞서 제습로터(460)를 통과한 공기가 상기 제3실내열교환기(430)의 방향(K2)으로 전달되면, 제3실내열교환기(430)와 상기 제4실내열교환기(435)를 순서대로 거치게 된다. 이 과정에서 공기는 4차 및 5차 제습이 이루어져 매우 낮은 습도를 가질 수 있다. 그리고, 습도가 낮춰진 공기는 상기 급기구(G3)를 통해서 실내공간으로 공급될 수 있다. Referring to FIG. 11, outside air (OA) sucked in from the outside is heated while passing through the second regenerative heat exchanger (470) constituting the third air conditioning unit (U3), and the heated air is transferred to the first regenerative heat exchanger ( 450) can be transmitted in the direction (K3). In addition, when the air that previously passed through the dehumidifying rotor 460 is delivered in the direction K2 of the third indoor heat exchanger 430, the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 are connected to each other. It goes through in order. In this process, the air undergoes 4th and 5th dehumidification and can have very low humidity. Additionally, air with reduced humidity can be supplied to the indoor space through the air supply opening (G3).

다음으로, 제3공조모드에 대해 설명한다. 먼저 도 3를 참고하여 제3공조모드의 개략적인 운전을 보면, 상기 제3공조모드가 선택되면(S320), 상기 제1공조유닛(U1), 상기 제2공조유닛(U2) 및 상기 제3공조유닛(U3)을 구성하는 구성요소의 동작이 제어될 수 있다(S420). 구체적으로는, 상기 제1실외압축기(110), 제2실외압축기(210), 제3실외압축기(310), 제1모듈압축기(710) 및 제2모듈압축기(910)가 동작된다. Next, the third air conditioning mode will be described. First, looking at the schematic operation of the third air conditioning mode with reference to FIG. 3, when the third air conditioning mode is selected (S320), the first air conditioning unit (U1), the second air conditioning unit (U2), and the third air conditioning unit (U1) The operation of the components constituting the air conditioning unit (U3) can be controlled (S420). Specifically, the first outdoor compressor 110, the second outdoor compressor 210, the third outdoor compressor 310, the first module compressor 710, and the second module compressor 910 are operated.

상기 제1실외열교환기(130), 상기 제3실외열교환기(330), 제1회수열교환기(410), 상기 제1재생열교환기(450), 제2재생열교환기(470), 그리고 제1모듈열교환기(730) 및 제2모듈열교환기(930)는 각각 응축기로 동작될 수 있다. 그리고, 상기 제2실외열교환기(230), 제1실내열교환기(421), 제2실내열교환기(425)(322), 상기 제3실내열교환기(430), 제4실내열교환기(435), 제2회수열교환기(440)(350), 그리고 제1모듈열교환기(730) 및 제2모듈열교환기(930)는 각각 증발기로 동작될 수 있다. The first outdoor heat exchanger 130, the third outdoor heat exchanger 330, the first recovery heat exchanger 410, the first regenerative heat exchanger 450, the second regenerative heat exchanger 470, and the first regenerative heat exchanger 470. The first module heat exchanger 730 and the second module heat exchanger 930 may each be operated as a condenser. And, the second outdoor heat exchanger (230), the first indoor heat exchanger (421), the second indoor heat exchanger (425) (322), the third indoor heat exchanger (430), and the fourth indoor heat exchanger (435) ), the second recovery heat exchanger (440) (350), and the first module heat exchanger (730) and second module heat exchanger (930) may each be operated as an evaporator.

앞서 설명한 바와 같이, 상기 제1모듈열교환기(730) 및 제2모듈열교환기(930)는 판형 열교환기로 구성될 수 있고, 따라서 제2메인냉매, 제3메인냉매의 응축기이자 제1재생냉매, 제2재생냉매의 재생냉매의 증발기가 될 수 있다. As described above, the first module heat exchanger 730 and the second module heat exchanger 930 may be configured as a plate-type heat exchanger, and therefore are condensers of the second main refrigerant and the third main refrigerant and the first regenerative refrigerant, It may be an evaporator of the regenerated refrigerant of the second regenerated refrigerant.

도 12 내지 도 15에는 상기 제3공조모드일 때 메인냉매의 흐름이 도시되어 있다. 상기 제3공조모드는 제습과 함께, 실내온도를 낮추기 위한 공기의 냉각기능도 할 수 있다. 12 to 15 show the flow of the main refrigerant in the third air conditioning mode. The third air conditioning mode can perform a dehumidifying and air cooling function to lower the indoor temperature.

이 중에서, 도 12에는 제3공조모드일 때 메인냉매유동과 재생냉매유동이 화살표로 표시되어 있고, 도 13에는 제1공조유닛(U1)에서 제1메인냉매유동이 순서도 형태로 도시되어 있으며, 도 14에는 제2공조유닛(U2)에서 제2메인냉매유동과 제1재생냉매이 순서도 형태로 도시되어 있다. 도 15에는 제3공조유닛(U3)에서 제3메인냉매유동과 제2재생냉매유동이 순서도 형태로 도시되어 있다.Among these, in Figure 12, the main refrigerant flow and the regenerative refrigerant flow in the third air conditioning mode are indicated by arrows, and in Figure 13, the first main refrigerant flow in the first air conditioning unit (U1) is shown in the form of a flow chart, In Figure 14, the second main refrigerant flow and the first regenerated refrigerant in the second air conditioning unit (U2) are shown in the form of a flow chart. In Figure 15, the third main refrigerant flow and the second regenerative refrigerant flow in the third air conditioning unit (U3) are shown in the form of a flow chart.

먼저 도 12와 도 13을 참조하여 제3공조모드일 때, 상기 제1공조유닛(U1)에서 냉매의 흐름을 보면, 상기 제1실외압축기(110)가 제1메인냉매를 압축하여, 고온/고압의 제1메인냉매를 제1압축기 토출관(L101)으로 토출한다. 토출된 고온/고압의 제1메인냉매 중 일부는 상기 제1회수열교환기(410)로 전달되고, 나머지 일부는 상기 제1실외열교환기(130)로 전달된다. 즉, 상기 제1회수열교환기(410)와 상기 제1실외열교환기(130)가 각각 응축기로 사용될 수 있다. First, referring to FIGS. 12 and 13, looking at the flow of refrigerant in the first air conditioning unit (U1) in the third air conditioning mode, the first outdoor compressor (110) compresses the first main refrigerant, The high-pressure first main refrigerant is discharged through the first compressor discharge pipe (L101). Some of the discharged high-temperature/high-pressure first main refrigerant is transferred to the first recovery heat exchanger (410), and the remaining part is transferred to the first outdoor heat exchanger (130). That is, the first recovery heat exchanger 410 and the first outdoor heat exchanger 130 can each be used as a condenser.

이때, 상기 제1회수열교환기(410)로 냉매가 흐르는 경로는 제1고압관이 될 수 있다. 여기서 제1고압관은 상기 제1압축기 토출관(L101)-제1-1실외기 연결관(L103)-제1-1분배 연결관(L105)이 될 수 있다. 이때, 상기 제1-1실외기 연결관(L103)과 상기 제1-1분배 연결관(L105)의 사이에는 상기 제1전달모듈(500)의 제1냉매분배밸브(510)가 배치되고, 상기 제1냉매분배밸브(510)가 이들을 연결해줄 수 있다. At this time, the path through which the refrigerant flows into the first recovery heat exchanger 410 may be the first high pressure pipe. Here, the first high pressure pipe may be the first compressor discharge pipe (L101), the 1-1 outdoor unit connection pipe (L103), and the 1-1 distribution connection pipe (L105). At this time, the first refrigerant distribution valve 510 of the first delivery module 500 is disposed between the 1-1 outdoor unit connection pipe (L103) and the 1-1 distribution connection pipe (L105), The first refrigerant distribution valve 510 can connect them.

그리고, 상기 제1실외열교환기(130)로 냉매가 흐르는 경로도 제1고압관이 될 수 있다. 여기서 제1고압관은 상기 제1압축기 토출관(L101)-제1-1실외열교환 연결관(L102)이 될 수 있다. 참고로, 이때 상기 제1메인실외밸브(150)와 상기 제1서브실외밸브(160)는 OFF상태로 볼 수 있다. In addition, the path through which the refrigerant flows into the first outdoor heat exchanger 130 may also be the first high pressure pipe. Here, the first high pressure pipe may be the first compressor discharge pipe (L101)-1-1 outdoor heat exchange connection pipe (L102). For reference, at this time, the first main outdoor valve 150 and the first sub-outdoor valve 160 can be viewed as OFF.

여기서, 상기 제1회수열교환기(410)에는 상기 제1실외열교환기(130) 보다 많은 유량의 제1메인냉매가 공급될 수 있다. 예를 들어, 상기 제1회수열교환기(410)에는 약 70%의 제1메인냉매가 공급되고, 상기 제1실외열교환기(130)에는 약 30%의 제1메인냉매가 공급될 수 있다. Here, the first main refrigerant may be supplied to the first recovery heat exchanger 410 at a flow rate greater than that of the first outdoor heat exchanger 130. For example, about 70% of the first main refrigerant may be supplied to the first recovery heat exchanger 410, and about 30% of the first main refrigerant may be supplied to the first outdoor heat exchanger 130.

상기 제1회수열교환기(410)에서 응축된 제1메인냉매는 중온/고압의 상태가 되어, 상기 제1실내열교환기(421) 및 상기 제2실내열교환기(425)에 전달될 수 있다. 이때, 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)로 유동하는 제1메인냉매의 경로는 제1액관이 될 수 있다. 구체적으로는, 상기 제1실내기 연결관(L128)은 상기 제1실내열교환기(421)로 냉매가 유동하는 제1액관이 되고, 상기 제1실내기 연결관(L128)-제1실내 분기관(L125)은 상기 제2실내열교환기(425)로 냉매가 유동하는 제1액관이 된다. The first main refrigerant condensed in the first recovery heat exchanger 410 is in a medium temperature/high pressure state and can be transferred to the first indoor heat exchanger 421 and the second indoor heat exchanger 425. At this time, the path of the first main refrigerant flowing to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be the first liquid pipe. Specifically, the first indoor unit connection pipe (L128) becomes the first liquid pipe through which the refrigerant flows to the first indoor heat exchanger 421, and the first indoor unit connection pipe (L128) - first indoor branch pipe ( L125) becomes the first liquid pipe through which the refrigerant flows to the second indoor heat exchanger (425).

상기 제1-1실내열교환 연결관(L124)에는 상기 제1실내팽창변(423)이 배치되어, 냉매는 상기 제1실내팽창변(423)에서 팽창된 상태로 증발기인 상기 제1실내열교환기(421)로 유동될 수 있다. 상기 제1-2실내열교환 연결관(L126)에는 상기 제2실내팽창변(427)이 배치되어, 제1메인냉매는 상기 제2실내팽창변(427)에서 팽창된 상태로 증발기인 상기 제2실내열교환기(425)로 유동될 수 있다. The first indoor expansion valve 423 is disposed on the 1-1 indoor heat exchange connection pipe (L124), and the refrigerant is expanded in the first indoor expansion valve 423 in the first indoor heat exchanger 421, which is an evaporator. ) can flow. The second indoor expansion valve 427 is disposed in the first-second indoor heat exchange connection pipe (L126), and the first main refrigerant is expanded in the second indoor expansion valve 427 and is used in the second indoor heat exchanger, which is an evaporator. It can flow into the group 425.

상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 각각 증발기가 되므로, 상기 실내덕트(S) 내부의 공기를 냉각/제습할 수 있다. 상기 제1실내열교환기(421)를 지나면서 1차로 냉각/제습된 외기(OA)는 상기 제2실내열교환기(425)를 지나면서 2차로 냉각/제습될 수 있다. 도 13에서, 외기(OA)가 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)를 지나는 모습이 굵은 화살표로 표현되어 있다. Since the first indoor heat exchanger 421 and the second indoor heat exchanger 425 each function as an evaporator, they can cool/dehumidify the air inside the indoor duct (S). Outdoor air (OA) that is primarily cooled/dehumidified while passing through the first indoor heat exchanger 421 may be secondarily cooled/dehumidified while passing through the second indoor heat exchanger 425. In FIG. 13, the outside air (OA) passing through the first indoor heat exchanger 421 and the second indoor heat exchanger 425 is represented by a thick arrow.

상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)에는 서로 다른 비율로 제1메인냉매가 공급될 수 있다. 상기 제1회수열교환기(410)에 가까운 상기 제1실내열교환기(421)에는 상기 제2실내열교환기(425) 보다 많은 양의 제1메인냉매가 공급될 수 있다. 앞서 제어부(1000)의 제어에 의해 상기 제1회수열교환기(410)에는 상기 제1실외열교환기(130) 보다 많은 양의 제1메인냉매가 공급되었기 때문이다. 예를 들어, 상기 제1실내열교환기(421)에는 약 70%의 제1메인냉매가 공급되고, 상기 제2실내열교환기(425)에는 약 30%의 제1메인냉매가 공급될 수 있다. The first main refrigerant may be supplied to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 at different ratios. A larger amount of first main refrigerant may be supplied to the first indoor heat exchanger 421, which is close to the first recovery heat exchanger 410, than to the second indoor heat exchanger 425. This is because a larger amount of first main refrigerant was supplied to the first recovery heat exchanger 410 than to the first outdoor heat exchanger 130 under the control of the control unit 1000. For example, about 70% of the first main refrigerant may be supplied to the first indoor heat exchanger 421, and about 30% of the first main refrigerant may be supplied to the second indoor heat exchanger 425.

이때, 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 상기 실내덕트(S)의 내부에서 공기의 유동방향을 따라 서로 나란하게 배치될 수 있다. 따라서, 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)는 외기(OA)를 연속하여 냉각/제습해줄 수 있다. 상기 제1실내열교환기(421)와 상기 제2실내열교환기(425)에 의해 냉각된 외기(OA)는 계속 유동하면서 상기 제습로터(460)를 거치면서 3차로 제습되고, 마지막으로 상기 제3실내열교환기(430)와 제4실내열교환기(435)에 의해 4차 및 5차로 냉각/제습되어 급기(SA)가 되고, 상기 급기구(G3)를 통해 실내공간으로 공급될 수 있다. 상기 3차 내지 5차 제습 구조는 아래에서 다시 설명하기로 한다. At this time, the first indoor heat exchanger 421 and the second indoor heat exchanger 425 may be arranged side by side along the air flow direction inside the indoor duct (S). Accordingly, the first indoor heat exchanger 421 and the second indoor heat exchanger 425 can continuously cool/dehumidify the outside air (OA). The outdoor air (OA) cooled by the first indoor heat exchanger 421 and the second indoor heat exchanger 425 continues to flow and is dehumidified three times while passing through the dehumidifying rotor 460, and finally, the third indoor heat exchanger 425 It is cooled/dehumidified in the 4th and 5th stages by the indoor heat exchanger 430 and the fourth indoor heat exchanger 435 to become supply air (SA), and can be supplied to the indoor space through the supply opening (G3). The third to fifth dehumidification structures will be described again below.

상기 제1실내열교환기(421)에서 배출된 저온/저압의 제1메인냉매는 제1열교환 유도관(L117)을 거쳐 상기 제1전달모듈(500)에 유입되고, 상기 제1전달모듈(500)의 내부에서 제1열교환 연결관(L116)을 통해 상기 제1냉매열교환기(530)에 전달될 수 있다. 그리고, 제1메인냉매는 제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)을 통해 상기 제1어큐뮬레이터(120)로 공급된 후에, 제1압축기 흡입관(L115)을 통해 다시 제1실외압축기(110)로 흡입될 수 있다. 따라서 상기 제1열교환 유도관(L117)-제1열교환 연결관(L116)-제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)은 제1저압관이 될 수 있다. The low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 flows into the first transfer module 500 through the first heat exchange induction pipe (L117), and the first transfer module 500 ) can be transmitted to the first refrigerant heat exchanger 530 through the first heat exchange connection pipe (L116). And, the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110. Therefore, the first heat exchange induction pipe (L117) - the first heat exchange connection pipe (L116) - the first accumulator connection pipe (L111) - the first accumulator suction pipe (L113) may be the first low pressure pipe.

상기 제2실내열교환기(425)에서 배출된 저온/저압의 제1메인냉매는 제1-2분배 연결관(L119)을 거쳐 상기 제1전달모듈(500)에 유입되고, 상기 제1전달모듈(500)의 내부의 제1냉매분배밸브(510)를 통해 상기 제1냉매열교환기(530)에 합류될 수 있다. 그리고, 제1메인냉매는 제1어큐뮬레이터 연결관(L111)-제1어큐뮬레이터 흡입관(L113)을 통해 상기 제1어큐뮬레이터(120)로 공급된 후에, 제1압축기 흡입관(L115)을 통해 다시 제1실외압축기(110)로 흡입될 수 있다. The low-temperature/low-pressure first main refrigerant discharged from the second indoor heat exchanger (425) flows into the first transfer module (500) through the first-2 distribution connector (L119), and the first transfer module (500) flows into the first transfer module (500). It can be joined to the first refrigerant heat exchanger 530 through the first refrigerant distribution valve 510 inside (500). And, the first main refrigerant is supplied to the first accumulator (120) through the first accumulator connection pipe (L111) and the first accumulator suction pipe (L113), and then again to the first outdoor through the first compressor suction pipe (L115). It can be sucked into the compressor 110.

이때, 상기 제1냉매열교환기(530)는 상기 제1실내열교환기(421) 및 제2실내열교환기(425)에서 배출된 저온/저압의 제1메인냉매와, 상기 제1실외열교환기(130)에서 응축된 중온/고압의 제1메인냉매를 서로 열교환시킬 수 있다. 상기 제1실외열교환기(130)에서 응축된 중온/고압의 제1메인냉매는 상기 제1냉매열교환기(530)를 지나면서 제1실내열교환기(421) 및 제2실내열교환기(425)에서 배출된 저온/저압의 제1메인냉매에 방열(열교환)할 수 있다. 이에 따라 상기 중온/고압의 제1메인냉매는 액상냉매의 상태로 상기 제1실내열교환기(421) 및 제2실내열교환기(425)에 공급될 수 있다. At this time, the first refrigerant heat exchanger 530 is a low-temperature/low-pressure first main refrigerant discharged from the first indoor heat exchanger 421 and the second indoor heat exchanger 425, and the first outdoor heat exchanger ( The medium temperature/high pressure first main refrigerant condensed in 130) can be heat exchanged with each other. The medium-temperature/high-pressure first main refrigerant condensed in the first outdoor heat exchanger (130) passes through the first refrigerant heat exchanger (530) to the first indoor heat exchanger (421) and the second indoor heat exchanger (425). Heat can be dissipated (heat exchanged) into the low-temperature/low-pressure first main refrigerant discharged from . Accordingly, the first main refrigerant of medium temperature/high pressure can be supplied to the first indoor heat exchanger 421 and the second indoor heat exchanger 425 in the state of liquid refrigerant.

앞서 응축기로 동작되는 상기 제1회수열교환기(410)를 보면, 상기 제1회수열교환기(410)는 응축기로 작동하면서 제1회수열교환기(410)의 제1메인냉매는 배기(EA) 쪽으로 방열할 수 있다. 즉, 상기 제1회수열교환기(410)의 제1메인냉매는 상기 제1배기구(G5)를 통해 배출되는 배기(EA)와 열교환하면서 배기(EA)에 방열할 수 있는 것이다. 도 13에서, 환기(RA)가 상기 제1회수열교환기(410)를 지나고, 상기 제1회수열교환기(410)의 제1메인냉매가 상기 배기(EA)로 방열하는 모습이 굵은 화살표로 표현되어 있다. Looking at the first recovery heat exchanger 410 that operates as a condenser, the first recovery heat exchanger 410 operates as a condenser and the first main refrigerant of the first recovery heat exchanger 410 flows toward the exhaust (EA). It can dissipate heat. That is, the first main refrigerant of the first recovery heat exchanger 410 can radiate heat to the exhaust EA while exchanging heat with the exhaust EA discharged through the first exhaust port G5. In FIG. 13, the ventilation (RA) passes through the first recovery heat exchanger (410) and the first main refrigerant of the first recovery heat exchanger (410) radiates heat to the exhaust (EA), which is represented by a bold arrow. It is done.

이때, 상기 제1회수열교환기(410)로 공급되는 공기 중 일부는 실내공간에서 흡입된 환기(RA)로, 외부의 기온 보다 낮은 온도를 갖는다. 이처럼 상기 제1회수열교환기(410)와 열교환하는 배기(EA)는 외부의 공기 보다 온도가 낮기 때문에 상기 제1회수열교환기(410)를 지나는 제1메인냉매의 방열이 보다 효과적으로 이루어질 수 있다. 즉, 배기(EA)의 폐열을 이용하여 제1회수열교환기(410)의 제1메인냉매가 보다 효과적으로 방열되는 것이다. 따라서, 상기 제1공조유닛(U1)의 냉동사이클은 운전 고압이 낮아져 효율이 향상되고, 소비전력이 줄어들 수 있다. At this time, some of the air supplied to the first recovery heat exchanger 410 is ventilation (RA) drawn from the indoor space and has a temperature lower than the outside air temperature. In this way, since the exhaust air (EA) that exchanges heat with the first recovery heat exchanger (410) has a lower temperature than the outside air, heat dissipation of the first main refrigerant passing through the first recovery heat exchanger (410) can be performed more effectively. In other words, the first main refrigerant of the first recovery heat exchanger 410 is more effectively dissipated by using the waste heat of the exhaust (EA). Accordingly, the high operating pressure of the refrigeration cycle of the first air conditioning unit (U1) is lowered, thereby improving efficiency and reducing power consumption.

예를 들어, 간절기에 외부의 기온이 높은 환경이라면, 상기 제1회수열교환기(410)의 제1메인냉매는 외부의 공기에 방열하기 어렵고, 냉방 과부하현상이 발생할 수 있다. 그러나 본 실시례에서는 상기 제1회수열교환기(410)의 제1메인냉매와 열교환하는 공기는 실내에서 공급되는 환기(RA)이므로, 외부의 공기 보다 온도가 낮고, 따라서 과부하 없이 원활하게 방열할 수 있는 것이다. For example, in an environment where the outside temperature is high between seasons, it is difficult for the first main refrigerant of the first recovery heat exchanger 410 to dissipate heat to the outside air, and a cooling overload phenomenon may occur. However, in this embodiment, the air that exchanges heat with the first main refrigerant of the first recovery heat exchanger 410 is ventilation (RA) supplied from indoors, so its temperature is lower than that of the outside air, and therefore heat can be dissipated smoothly without overload. There is.

한편, 상기 제1회수열교환기(410)에 연결된 제1열회수 연결관(L127)에는 상기 제1열회수팽창변(415)이 배치될 수 있다. 상기 제어부(1000)는 상기 제1열회수팽창변(415)의 개도율을 조절하여, 상기 제1회수열교환기(410)에 공급되는 고온/고압의 제1메인냉매 유량을 조절할 수 있다. 상기 제1실외압축기(110)에서 토출되는 고온/고압의 제1메인냉매 유량은 정해져 있으므로, 상기 제1회수열교환기(410)에 공급되는 제1메인냉매 유량이 조절되면 상기 제1실외열교환기(130)로 공급되는 제1메인냉매 유량도 함께 조절될 수 있다. 이러한 냉매유량 조절을 통해서, 상기 제1회수열교환기(410)를 통한 폐열의 회수정도를 조절할 수도 있다. Meanwhile, the first heat recovery expansion valve 415 may be disposed in the first heat recovery connector L127 connected to the first recovery heat exchanger 410. The control unit 1000 can control the flow rate of the high-temperature/high-pressure first main refrigerant supplied to the first recovery heat exchanger 410 by adjusting the opening rate of the first heat recovery expansion valve 415. Since the high-temperature/high-pressure first main refrigerant flow rate discharged from the first outdoor compressor 110 is determined, when the first main refrigerant flow rate supplied to the first recovery heat exchanger 410 is adjusted, the first outdoor heat exchanger 410 The flow rate of the first main refrigerant supplied to (130) can also be adjusted. By adjusting the refrigerant flow rate, the degree of recovery of waste heat through the first recovery heat exchanger 410 can be adjusted.

예를 들어, (i) 상기 환기구(G4)를 통해 유입된 환기(RA)의 온도(실내온도)가 외부의 온도 보다 낮다면, 상기 제1회수열교환기(410)가 응축기로 작동하면서 상기 제1회수열교환기(410)의 제1메인냉매가 상기 환기(RA)에 방열하는 것이 외부의 공기에 방열하는 것 보다 효과적이다. 하지만, (ii) 상기 환기구(G4)를 통해 유입된 환기(RA)의 온도(실내온도)가 외부의 온도 보다 높다면, 상기 제1회수열교환기(410)가 응축기로 작동하면서 제1회수열교환기(410)의 제1메인냉매가 상기 환기(RA)에 방열하는 것은 외부의 공기에 방열하는 것 보다 효율이 낮다. 이 경우에는 상기 제1열회수팽창변(415)의 개도율을 조절하여, 응축기인 제1회수열교환기(410)로 유입되는 제1메인냉매의 유량을 줄이고, 다른 응축기인 제1실외열교환기(130)로 유입되는 제1메인냉매의 유량을 늘려 방열효율을 높일 수 있다. For example, (i) if the temperature (indoor temperature) of the ventilation (RA) introduced through the ventilation opening (G4) is lower than the external temperature, the first recovery heat exchanger (410) operates as a condenser and the first recovery heat exchanger (410) operates as a condenser. It is more effective for the first main refrigerant of the single recovery heat exchanger (410) to radiate heat to the ventilation (RA) than to radiate heat to the outside air. However, (ii) if the temperature (indoor temperature) of the ventilation (RA) introduced through the ventilation opening (G4) is higher than the external temperature, the first recovery heat exchanger (410) operates as a condenser and the first recovery heat exchanger Dissipation of heat by the first main refrigerant of the unit 410 to the ventilation RA is less efficient than dissipation of heat to external air. In this case, the opening rate of the first heat recovery expansion valve 415 is adjusted to reduce the flow rate of the first main refrigerant flowing into the first recovery heat exchanger 410, which is a condenser, and the first outdoor heat exchanger 130, which is another condenser. ), heat dissipation efficiency can be increased by increasing the flow rate of the first main refrigerant flowing into the system.

이어서, 도 12와 도 14를 참조하여, 제3공조모드일 때 상기 제2공조유닛(U2)에서 냉매의 흐름을 보면, 상기 제2실외압축기(210)가 제2메인냉매를 압축하여, 고온/고압의 제2메인냉매를 제2압축기 토출관(L201)으로 토출한다. 토출된 고온/고압의 제2메인냉매 전체는 상기 제2전달모듈(600)을 거쳐 상기 제1열교환모듈(700)의 제1열교환모듈(700)로 전달된다. 상기 제1모듈열교환기(730)는 제2메인냉매사이클의 응축기가 될 수 있다. Next, referring to FIGS. 12 and 14, looking at the flow of refrigerant in the second air conditioning unit (U2) in the third air conditioning mode, the second outdoor compressor (210) compresses the second main refrigerant, /Discharge the high-pressure second main refrigerant to the second compressor discharge pipe (L201). The entire discharged high-temperature/high-pressure second main refrigerant is transferred to the first heat exchange module 700 of the first heat exchange module 700 through the second transfer module 600. The first module heat exchanger 730 may be a condenser of the second main refrigerant cycle.

이때, 상기 제1열교환모듈(700)로 제2메인냉매가 흐르는 경로는 제2고압관이 될 수 있다. 여기서 제2고압관은 상기 제2압축기 토출관(L201)-제2-1실외기 연결관(L203)-제2-1분배 연결관(L205)이 될 수 있다. 이때, 상기 제2-1실외기 연결관(L203)과 상기 제2-1분배 연결관(L205)의 사이에는 상기 제2전달모듈(600)의 제2냉매분배밸브(610)가 배치되고, 상기 제2냉매분배밸브(610)가 이들을 연결해줄 수 있다. 참고로, 이때 상기 제2메인실외밸브(250)와 상기 제2서브실외밸브(260)는 OFF상태로 볼 수 있다. At this time, the path through which the second main refrigerant flows to the first heat exchange module 700 may be the second high pressure pipe. Here, the second high pressure pipe may be the second compressor discharge pipe (L201) - the 2-1 outdoor unit connection pipe (L203) - the 2-1 distribution connection pipe (L205). At this time, the second refrigerant distribution valve 610 of the second delivery module 600 is disposed between the 2-1 outdoor unit connection pipe (L203) and the 2-1 distribution connection pipe (L205), The second refrigerant distribution valve 610 can connect them. For reference, at this time, the second main outdoor valve 250 and the second sub-outdoor valve 260 can be viewed as OFF.

상기 제2메인냉매가 상기 제1모듈열교환기(730)를 거치는 과정에서, 상기 제2메인냉매는 제1모듈열교환기(730)를 유동하는 제1재생냉매와 열교환할 수 있다. 앞서 설명한 바와 같이, 상기 제1재생열교환기(450)는 상기 제1열교환모듈(700)과 함께 제1재생냉매를 유동시키는 별도의 제1재생냉매사이클을 구성할 수 있다. 여기서, 응축기로 동작되는 상기 제1재생열교환기(450)에서 발생된 열은 상기 제습로터(460)에 전달될 수 있다. 상기 제2외기구(G2)로 유입된 공기와, 상기 제2바이패스(B2)를 통해 전달된 공기, 그리고 상기 제2재생열교환기(470)를 지난 공기는 상기 제1재생열교환기(450)를 지나면서 열교환되어 온도가 더욱 상승할 수 있다. As the second main refrigerant passes through the first module heat exchanger (730), the second main refrigerant may exchange heat with the first regenerated refrigerant flowing through the first module heat exchanger (730). As described above, the first regenerative heat exchanger 450, together with the first heat exchange module 700, may form a separate first regenerative refrigerant cycle that flows the first regenerative refrigerant. Here, heat generated in the first regenerative heat exchanger 450, which operates as a condenser, may be transferred to the dehumidification rotor 460. The air introduced into the second external mechanism (G2), the air delivered through the second bypass (B2), and the air passing through the second regenerative heat exchanger (470) are transferred to the first regenerative heat exchanger (450). ), heat exchange occurs and the temperature may rise further.

그리고, 이렇게 가열된 공기가 상기 제습로터(460)로 전달되어 제습로터(460)를 재생시킬 수 있다. 따라서, 제습로터(460)의 재생을 위한 재생히터(465)의 사용량이 줄어들 수 있고, 결과적으로 제2공조유닛(U2)을 구동하기 위한 소비전력이 줄어들 수 있다. 도 14에서, 상기 제1재생열교환기(450)에서 방열된 공기가 상기 제습로터(460)를 지나는 모습이 굵은 화살표로 표현되어 있다. And, the heated air can be delivered to the dehumidification rotor 460 to regenerate the dehumidification rotor 460. Accordingly, the amount of use of the regeneration heater 465 for regeneration of the dehumidification rotor 460 can be reduced, and as a result, the power consumption for driving the second air conditioning unit (U2) can be reduced. In Figure 14, the air radiated from the first regenerative heat exchanger 450 passing through the dehumidifying rotor 460 is represented by a thick arrow.

동시에, 상기 제1열교환모듈(700)과 상기 제1재생열교환기(450)로 구성된 제1재생냉매사이클에는 제1재생냉매가 흐를 수 있다. 상기 제1모듈압축기(710)는 압축한 고온/고압의 제1재생냉매를 제1모듈압축기(710) 토출관(L245)으로 토출한다. 토출된 고온/고압의 제1재생냉매는 상기 제1재생열교환기(450)로 전달되고, 상기 제1재생열교환기(450)는 제1재생냉매를 응축할 수 있다. At the same time, the first regenerative refrigerant may flow through the first regenerative refrigerant cycle composed of the first heat exchange module 700 and the first regenerative heat exchanger 450. The first module compressor 710 discharges the compressed high-temperature/high-pressure first regenerative refrigerant to the discharge pipe L245 of the first module compressor 710. The discharged high-temperature/high-pressure first regenerative refrigerant is transferred to the first regenerative heat exchanger 450, and the first regenerative heat exchanger 450 can condense the first regenerative refrigerant.

상기 제1재생열교환기(450)가 제1재생냉매를 응축하는 과정에서 제1재생냉매는 방열하게 되고, 방열 후 제1재생냉매는 중온 고압 액상 냉매로 전환될 수 있다. 그리고, 제1재생냉매는 제1재생열교환 연결관(L247)을 통해 상기 제1모듈팽창변(740)으로 전달되어 팽창된 후에, 제1모듈열교환 연결관(L248)을 통해 상기 제1모듈열교환기(730)로 전달되어 증발될 수 있다. 증발된 제1재생냉매는 상기 제1모듈어큐뮬레이터 흡입관(L241)을 통해서 제1모듈어큐뮬레이터로 전달될 수 있다. In the process of the first regenerative heat exchanger 450 condensing the first regenerative refrigerant, the first regenerative refrigerant radiates heat, and after dissipating heat, the first regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. Then, the first regenerative refrigerant is delivered to the first module expansion valve 740 through the first regenerative heat exchange connection pipe (L247) and expanded, and then through the first module heat exchange connection pipe (L248) to the first module heat exchanger. It may be delivered to (730) and evaporated. The evaporated first regenerated refrigerant may be delivered to the first module accumulator through the first module accumulator suction pipe (L241).

이때, 상기 제1모듈열교환기(730)를 통과하는 제2메인냉매와 제1재생냉매는 서로 열교환될 수 있다. 상기 제2메인냉매는 상기 제1모듈열교환기(730)에서 응축되면서 제1재생냉매에 방열하며 액상으로 전환될 수 있다. 따라서, 제2메인냉매가 보다 효과적으로 방열될 수 있고, 상기 제2공조유닛(U2)의 제2메인냉매사이클은 운전 고압이 낮아져 효율이 향상되고, 소비전력이 줄어들 수 있다. At this time, the second main refrigerant and the first regenerated refrigerant passing through the first module heat exchanger 730 may exchange heat with each other. The second main refrigerant may be condensed in the first module heat exchanger 730, radiating heat to the first regenerated refrigerant, and converted into a liquid phase. Accordingly, the second main refrigerant can dissipate heat more effectively, and the operating high pressure of the second main refrigerant cycle of the second air conditioning unit (U2) is lowered, improving efficiency and reducing power consumption.

반대로, 상기 제1재생냉매는 상기 제1모듈열교환기(730)에서 증발되면서, 상기 제1재생냉매는 상기 제1모듈열교환기(730)를 흐르는 제2메인냉매로부터 흡열할 수 있다. 이때, 상기 제2메인냉매의 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제2공조유닛(U2)을 구성하는 제1재생냉매사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. 특히, 상기 제1재생냉매사이클을 구성하는 상기 제1재생열교환기(450)의 공기 취출온도를 약 60℃ 이상으로 높여, 고온재생형의 제습로터(460)의 재생 에너지로 사용할 수 있다. 이렇게 되면, 효율이 낮은 상기 재생히터(465)의 사용량을 줄여 에너지효율을 더욱 높일 수 있다. Conversely, as the first regenerated refrigerant evaporates in the first module heat exchanger 730, the first regenerated refrigerant may absorb heat from the second main refrigerant flowing through the first module heat exchanger 730. At this time, because the temperature of the second main refrigerant is high, the amount of heat absorption may increase. Accordingly, the operating low pressure of the first regenerative refrigerant cycle constituting the second air conditioning unit (U2) increases, thereby reducing power consumption. In particular, the air discharge temperature of the first regenerative heat exchanger 450, which constitutes the first regenerative refrigerant cycle, can be increased to about 60°C or higher and used as regenerative energy for the high-temperature regenerative dehumidification rotor 460. In this way, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.

이때, 상기 제3공조유닛(U3)을 구성하는 제2재생열교환기(470)를 통과하면서 가열된 공기는 상기 제1재생열교환기(450)의 방향(K3)으로 전달될 수 있다. 도 14를 보면, 공기의 흐름이 굵은 화살표로 표현되어 있다. 상기 제1재생열교환기(450) 방향(K3)으로 전달된 공기는 상기 제1재생열교환기(450)에 의해 다시 한번 승온된 상태로 상기 제습로터(460)에 전달될 수 있다. 그리고, 상기 제습로터(460)를 고온으로 재생시킨 공기는 상기 제2회수열교환기(440)로 전달될 수 있다. 상기 제2회수열교환기(440)를 거친 공기는 배기(EA)될 수 있다. At this time, air heated while passing through the second regenerative heat exchanger 470 constituting the third air conditioning unit (U3) may be transferred in the direction K3 of the first regenerative heat exchanger 450. Looking at Figure 14, the air flow is represented by a thick arrow. The air delivered in the direction K3 of the first regenerative heat exchanger 450 may be delivered to the dehumidifying rotor 460 in a state in which its temperature is raised again by the first regenerative heat exchanger 450. In addition, the air regenerated to high temperature by the dehumidification rotor 460 may be delivered to the second recovery heat exchanger 440. Air that has passed through the second recovery heat exchanger 440 may be exhausted (EA).

한편, 상기 제2모듈열교환기(930)를 거치면서 열교환되면서 응축된 제2메인냉매 중 일부는 상기 제2회수열교환기(440)로 전달되어 증발될 수 있고, 나머지 일부는 제2실외열교환기로 전달되어 증발될 수 있다. Meanwhile, part of the second main refrigerant condensed while exchanging heat while passing through the second module heat exchanger 930 may be transferred to the second recovery heat exchanger 440 and evaporated, and the remaining part may be transferred to the second outdoor heat exchanger. It can be transmitted and evaporated.

상기 제1모듈열교환기(730)에서 응축된 중온/고압의 제2메인냉매는 상기 제2회수열교환기(440)와 제2실외열교환기(230)에서 증발될 수 있다. 이때, 상기 제2회수열교환기(440)와 제2실외열교환기(230)로 유동하는 냉매의 경로는 제2액관이 될 수 있다. The medium-temperature/high-pressure second main refrigerant condensed in the first module heat exchanger (730) may be evaporated in the second recovery heat exchanger (440) and the second outdoor heat exchanger (230). At this time, the path of the refrigerant flowing to the second recovery heat exchanger 440 and the second outdoor heat exchanger 230 may be the second liquid pipe.

구체적으로는, 상기 제1메인연결관(L224)-제2열회수연결관(L225)은 상기 제2회수열교환기(440)로 제2메인냉매가 유동하는 제2액관이 된다. 또한, 제1모듈연결관(L223)-제2-2실외기 연결관(L222)은 상기 제2실외열교환기(230)로 제2메인냉매가 유동하는 제2액관이 된다. Specifically, the first main connection pipe (L224) and the second heat recovery connection pipe (L225) become a second liquid pipe through which the second main refrigerant flows to the second recovery heat exchanger (440). In addition, the first module connection pipe (L223) - the 2-2 outdoor unit connection pipe (L222) becomes a second liquid pipe through which the second main refrigerant flows to the second outdoor heat exchanger (230).

이때, 상기 제2회수열교환기(440)의 제2메인냉매는 상기 실내기(400)에서 외부로 배출되는 배기(EA)로부터 흡열할 수 있다. 이때, 상기 배기(EA)는 외부의 공기 보다 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제2공조유닛(U2)에 의한 냉동사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. At this time, the second main refrigerant of the second recovery heat exchanger (440) may absorb heat from the exhaust (EA) discharged to the outside from the indoor unit (400). At this time, since the temperature of the exhaust EA is higher than that of the external air, the amount of heat absorption may increase. Accordingly, the low operating pressure of the refrigeration cycle by the second air conditioning unit (U2) increases, thereby reducing power consumption.

결과적으로, 상기 제2회수열교환기(440)는 증발기로 동작될 때 배기(EA)의 온도를 활용하므로, 상기 제2공조유닛(U2)의 냉동사이클을 운전하는데 필요한 전력의 소모를 줄이는 기능을 할 수 있다. As a result, the second recovery heat exchanger (440) utilizes the temperature of the exhaust (EA) when operating as an evaporator, thereby reducing the power consumption required to operate the refrigeration cycle of the second air conditioning unit (U2). can do.

상기 제2회수열교환기(440)에서 증발된 저온/저압의 제2메인냉매는 제2열교환 전달관(L217)을 통해 상기 제2전달모듈(600)에 유입될 수 있다. 그리고, 제2열교환 연결관(L216)을 통해 상기 제2냉매열교환기(630)를 지난 제2메인냉매는 상기 제2어큐뮬레이터를 통해 상기 제2실외압축기(210)에 흡입될 수 있다. 따라서 상기 제2열교환 전달관(L217)-상기 제2열교환 연결관(L216)-제2어큐뮬레이터 연결관(L211)-제2어큐뮬레이터 흡입관(L213)은 제2저압관이 될 수 있다. The low-temperature/low-pressure second main refrigerant evaporated in the second recovery heat exchanger 440 may flow into the second transfer module 600 through the second heat exchange transfer pipe (L217). In addition, the second main refrigerant that has passed through the second refrigerant heat exchanger 630 through the second heat exchange connector L216 can be sucked into the second outdoor compressor 210 through the second accumulator. Therefore, the second heat exchange transmission pipe (L217) - the second heat exchange connection pipe (L216) - the second accumulator connection pipe (L211) - the second accumulator suction pipe (L213) may be the second low pressure pipe.

한편, 상기 제2실내열교환기(425)를 통과한 공기는 상기 제습로터(460) 방향(K1)으로 유동하여 상기 제습로터(460)를 통과하면서 제습될 수 있다. 이렇게 제습된 공기는 상기 제3실내열교환기(430)의 방향(K2)으로 전달될 수 있다. 도 12과 도 14에서, 공기가 상기 제습로터(460)를 통과하는 모습이 굵은 화살표로 표현되어 있다.Meanwhile, the air that has passed through the second indoor heat exchanger 425 may flow in the direction K1 of the dehumidifying rotor 460 and be dehumidified while passing through the dehumidifying rotor 460. The air dehumidified in this way can be delivered in the direction K2 of the third indoor heat exchanger 430. 12 and 14, the air passing through the dehumidifying rotor 460 is represented by a thick arrow.

이때, 상기 제습로터(460)의 일부는 상기 실내덕트(S)의 내부에서 공기의 유동방향을 따라 배치될 수 있다. 따라서, 상기 제습로터(460)는 앞서 제1실내열교환기(421)와 제2실내열교환기(425)를 거친 외기(OA)를 다시 제습하므로, 총 3차에 걸쳐 연속적인 제습이 이루어지면서 외기(OA)의 습도를 매우 낮게 낮출 수 있다. At this time, a part of the dehumidifying rotor 460 may be disposed along the air flow direction inside the indoor duct (S). Accordingly, the dehumidification rotor 460 re-dehumidifies the outdoor air (OA) that previously passed through the first indoor heat exchanger 421 and the second indoor heat exchanger 425, so that continuous dehumidification is performed a total of three times to maintain the outdoor air. The humidity of (OA) can be lowered to a very low level.

이어서, 도 12와 도 15를 참조하여, 제3공조모드일 때 상기 제3공조유닛(U3)에서 제3메인냉매의 흐름을 보면, 상기 제3실외압축기(310)가 제3메인냉매를 압축하여, 고온/고압의 제3메인냉매를 제3압축기 토출관(L301)으로 토출한다. 토출된 고온/고압의 제3메인냉매 중 일부는 상기 제3전달모듈(800)을 통해 제2모듈열교환기(930)로 전달되고, 나머지 일부는 상기 3실외열교환기(330)로 전달된다. 상기 제2모듈열교환기(930)와 상기 제3실외열교환기(330)가 각각 응축기로 사용될 수 있다. Next, referring to FIGS. 12 and 15, looking at the flow of the third main refrigerant in the third air conditioning unit (U3) in the third air conditioning mode, the third outdoor compressor 310 compresses the third main refrigerant. Thus, the high-temperature/high-pressure third main refrigerant is discharged to the third compressor discharge pipe (L301). Some of the discharged high-temperature/high-pressure third main refrigerant is transferred to the second module heat exchanger (930) through the third transfer module (800), and the remaining part is transferred to the three outdoor heat exchangers (330). The second module heat exchanger 930 and the third outdoor heat exchanger 330 may each be used as a condenser.

이때, 상기 제2모듈열교환기(930)로 냉매가 흐르는 경로는 제2고압관이 될 수 있다. 여기서 제2고압관은 상기 제3압축기 토출관(L301)-제3-1실외기 연결관(L303)-제3-1분배 연결관(L305)이 될 수 있다. 이때, 상기 제3-1실외기 연결관(L303)과 상기 제3-1분배 연결관(L305)의 사이에는 상기 제3전달모듈(800)의 제3냉매분배밸브(810)가 배치되고, 상기 제3냉매분배밸브(810)가 이들을 연결해줄 수 있다. At this time, the path through which the refrigerant flows into the second module heat exchanger 930 may be the second high pressure pipe. Here, the second high pressure pipe may be the third compressor discharge pipe (L301) - the 3-1 outdoor unit connection pipe (L303) - the 3-1 distribution connection pipe (L305). At this time, the third refrigerant distribution valve 810 of the third delivery module 800 is disposed between the 3-1 outdoor unit connection pipe (L303) and the 3-1 distribution connection pipe (L305), The third refrigerant distribution valve 810 can connect them.

상기 제2모듈열교환기(930)에서 응축된 제3메인냉매는 중온/고압의 상태가 되어, 상기 제3실내열교환기(430) 및 제4실내열교환기(435)에 전달될 수 있다. 이때, 상기 제3실외열교환기(330)에 의해 응축된 제3메인냉매는 제3냉매열교환기(830)를 거쳐, 상기 제2모듈열교환기(930)에서 응축된 제3메인냉매와 혼합될 수 있다. 이렇게 혼합된 제3메인냉매는 제3실내열교환기(430)와 제4실내열교환기(435)로 전달될 수 있다. The third main refrigerant condensed in the second module heat exchanger 930 is in a medium temperature/high pressure state and can be delivered to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435. At this time, the third main refrigerant condensed by the third outdoor heat exchanger 330 passes through the third refrigerant heat exchanger 830 and is mixed with the third main refrigerant condensed in the second module heat exchanger 930. You can. The third main refrigerant mixed in this way can be delivered to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435.

이때, 상기 제3냉매열교환기(830)에는 제3 및 제4실내열교환기(430, 435)에서 증발된 저온/저압의 제3메인냉매가 흐르고 있다. 따라서, 앞서 제3실외열교환기(330)에 의해 응축된 중온/고압의 제3메인냉매는 상기 제3냉매열교환기(830)를 지날 때 상기 저온/저압의 제3메인냉매에 방열(열교환)하여 액상 냉매로 전환된 후, 제2모듈열교환기(930)에서 응축된 제3메인냉매와 혼합될 수 있다. At this time, the low-temperature/low-pressure third main refrigerant evaporated from the third and fourth indoor heat exchangers (430, 435) is flowing through the third refrigerant heat exchanger (830). Therefore, the medium-temperature/high-pressure third main refrigerant previously condensed by the third outdoor heat exchanger 330 radiates heat (heat exchange) to the low-temperature/low-pressure third main refrigerant when passing through the third refrigerant heat exchanger 830. After being converted to a liquid refrigerant, it can be mixed with the third main refrigerant condensed in the second module heat exchanger (930).

상기 제3실내열교환기(430)와 제4실내열교환기(435)로 유동하는 냉매의 경로는 제3액관이 될 수 있다. 구체적으로는, 상기 제3-2실외기 연결관(L322)-제2메인연결관(L323)-제4열교환 전달관(L324)은 상기 제3실내열교환기(430)와 제4실내열교환기(435)로 냉매가 유동하는 제3액관이 된다. The path of the refrigerant flowing into the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 may be a third liquid pipe. Specifically, the 3-2 outdoor unit connection pipe (L322) - the 2nd main connection pipe (L323) - the 4th heat exchange transmission pipe (L324) is connected to the 3rd indoor heat exchanger 430 and the 4th indoor heat exchanger ( 435), which becomes the third liquid pipe through which the refrigerant flows.

상기 제1실내열교환기(421), 상기 제2실내열교환기(425), 상기 제습로터(460)의 일부와 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 상기 실내덕트(S)의 내부에서 공기의 유동방향을 따라 서로 연속되게 배치될 수 있다. 따라서, 상기 제1실내열교환기(421), 상기 제2실내열교환기(425), 상기 제습로터(460)의 일부와 상기 제3실내열교환기(430)와 제4실내열교환기(435)는 외기(OA)를 총 5차에 걸쳐 연속적으로 제습하면서 외기(OA)의 습도를 크게 낮출 수 있다. The first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidifying rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are installed in the indoor space. Inside the duct (S), they may be arranged continuously along the direction of air flow. Accordingly, the first indoor heat exchanger 421, the second indoor heat exchanger 425, a portion of the dehumidification rotor 460, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 435 are The humidity of the outdoor air (OA) can be greatly reduced by continuously dehumidifying the outdoor air (OA) a total of five times.

상기 제3실내열교환기(430)에서 배출된 저온/저압의 제3메인냉매는 제3열교환 전달관(L317)을 거쳐 상기 제3전달모듈(800)에 유입되고, 상기 제3전달모듈(800)의 내부에서 제3열교환 연결관(L316)을 통해 상기 제3냉매열교환기(830)에 전달될 수 있다. 동시에, 상기 제4실내열교환기(435)에서 배출된 저온/저압의 제3메인냉매는 제3-2분배 연결관(L319)을 거쳐 상기 제3전달모듈(800)에 유입되고, 상기 제3전달모듈(800)의 내부에서 제3냉매분배밸브(810)을 경유하여 상기 제3냉매열교환기(830)에 전달될 수 있다.The low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 flows into the third transfer module 800 through the third heat exchange transfer pipe (L317), and the third transfer module 800 ) can be transmitted to the third refrigerant heat exchanger (830) through the third heat exchange connection pipe (L316). At the same time, the low-temperature/low-pressure third main refrigerant discharged from the fourth indoor heat exchanger (435) flows into the third transfer module (800) through the third-2 distribution connector (L319), and the third main refrigerant is discharged from the fourth indoor heat exchanger (435). Inside the transfer module 800, the refrigerant may be transferred to the third refrigerant heat exchanger 830 via the third refrigerant distribution valve 810.

그리고, 상기 제3냉매열교환기(830)를 통과한 제3메인냉매는 제3어큐뮬레이터 연결관(L311)-제3어큐뮬레이터 흡입관(L313)을 통해 상기 제3어큐뮬레이터(420)로 공급된 후에, 제3압축기 흡입관(L315)을 통해 다시 제3실외압축기(310)로 흡입될 수 있다. 따라서 상기 제3-2분배 연결관(L319)-제3열교환 연결관(L316)-제3어큐뮬레이터 연결관(L311)-제3어큐뮬레이터 흡입관(L313)은 제3저압관이 될 수 있다. And, the third main refrigerant that has passed through the third refrigerant heat exchanger (830) is supplied to the third accumulator (420) through the third accumulator connection pipe (L311) and the third accumulator suction pipe (L313). It can be sucked back into the third outdoor compressor (310) through the third compressor suction pipe (L315). Therefore, the 3-2 distribution connection pipe (L319) - the 3rd heat exchange connection pipe (L316) - the 3rd accumulator connection pipe (L311) - the 3rd accumulator suction pipe (L313) can be a third low pressure pipe.

이때, 상기 제3냉매열교환기(830)는 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 배출된 저온/저압의 제3메인냉매와, 상기 제3실외열교환기(330)에서 응축된 중온/고압의 냉매를 서로 열교환시킬 수 있다. 상기 제3실외열교환기(330)에서 응축된 중온/고압의 냉매는 상기 제3냉매열교환기(830)를 지나면서 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 배출된 저온/저압의 냉매에 방열할 수 있다. 이에 따라 상기 중온/고압의 제3메인냉매는 액상냉매의 상태로 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에 공급될 수 있다. At this time, the third refrigerant heat exchanger 830 is a low-temperature/low-pressure third main refrigerant discharged from the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435, and the third outdoor heat exchanger. The medium temperature/high pressure refrigerant condensed in (330) can exchange heat with each other. The medium-temperature/high-pressure refrigerant condensed in the third outdoor heat exchanger (330) passes through the third refrigerant heat exchanger (830) and is discharged from the third indoor heat exchanger (430) and the fourth indoor heat exchanger (435). It can dissipate heat in low temperature/low pressure refrigerant. Accordingly, the third main refrigerant of medium temperature/high pressure can be supplied to the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 in the state of a liquid refrigerant.

동시에, 상기 제2열교환모듈(900)과 상기 제2재생열교환기(470)로 구성된 제2재생냉매사이클에는 제2재생냉매가 흐를 수 있다. 상기 제2모듈압축기(910)는 압축한 고온/고압의 제2재생냉매를 제2모듈압축기(910) 토출관(L345)으로 토출한다. 토출된 고온/고압의 제2재생냉매는 상기 제2재생열교환기(470)로 전달되고, 상기 제2재생열교환기(470)는 제2재생냉매를 응축할 수 있다. At the same time, the second regenerative refrigerant may flow through the second regenerative refrigerant cycle composed of the second heat exchange module 900 and the second regenerative heat exchanger 470. The second module compressor 910 discharges the compressed high-temperature/high-pressure second regenerative refrigerant to the discharge pipe L345 of the second module compressor 910. The discharged high-temperature/high-pressure second regenerative refrigerant is transferred to the second regenerative heat exchanger 470, and the second regenerative heat exchanger 470 can condense the second regenerative refrigerant.

상기 제2재생열교환기(470)가 제2재생냉매를 응축하는 과정에서 제2재생냉매는 방열하게 되고, 방열 후 제2재생냉매는 중온 고압 액상 냉매로 전환될 수 있다. 그리고, 제2재생냉매는 제2재생열교환 연결관(L347)을 통해 상기 제2모듈팽창변(940)으로 전달되어 팽창된 후에, 상기 제2모듈열교환기(930)로 전달되어 증발될 수 있다. 증발된 제2재생냉매는 상기 제2모듈어큐뮬레이터 흡입관(L341)을 통해서 제2모듈어큐뮬레이터로 전달될 수 있다. In the process of condensing the second regenerative refrigerant by the second regenerative heat exchanger 470, the second regenerative refrigerant radiates heat, and after dissipating heat, the second regenerative refrigerant can be converted into a medium-temperature and high-pressure liquid refrigerant. In addition, the second regenerative refrigerant may be transferred to the second module expansion valve 940 through the second regenerative heat exchange connection pipe L347 and expanded, and then transferred to the second module heat exchanger 930 to be evaporated. The evaporated second regenerated refrigerant may be delivered to the second module accumulator through the second module accumulator suction pipe (L341).

이때, 상기 제2모듈열교환기(930)를 통과하는 제3메인냉매와 제2재생냉매는 서로 열교환될 수 있다. 상기 제3메인냉매는 상기 제2모듈열교환기(930)에서 응축되면서 제2재생냉매에 방열하며 액상으로 전환될 수 있다. 따라서, 제3메인냉매가 보다 효과적으로 방열될 수 있고, 상기 제3공조유닛(U3)의 제3메인냉매사이클은 운전 고압이 낮아져 효율이 향상되고, 소비전력이 줄어들 수 있다. At this time, the third main refrigerant and the second regenerative refrigerant passing through the second module heat exchanger 930 may exchange heat with each other. The third main refrigerant may be condensed in the second module heat exchanger 930, radiating heat to the second regenerated refrigerant, and converted into a liquid phase. Accordingly, the third main refrigerant can dissipate heat more effectively, and the operating high pressure of the third main refrigerant cycle of the third air conditioning unit (U3) is lowered, improving efficiency and reducing power consumption.

반대로, 상기 제2재생냉매는 상기 제2모듈열교환기(930)에서 증발되면서, 상기 제2재생냉매는 상기 제2모듈열교환기(930)를 흐르는 제3메인냉매로부터 흡열할 수 있다. 이때, 상기 제3메인냉매의 온도가 높기 때문에 흡열량이 늘어날 수 있다. 이에 따라 제3공조유닛(U3)을 구성하는 제2재생냉매사이클의 운전 저압이 높아져 전력소모가 줄어들 수 있다. 상기 제2재생냉매사이클을 구성하는 상기 제2재생열교환기(470)의 공기 취출온도를 약 40℃ 이상으로 높여, 상기 제1재생열교환기(450) 방향(K3)으로 전달할 수 있다. 이렇게 전달된 공기는 고온재생형의 제습로터(460)의 재생 에너지로 사용할 수 있다. 따라서, 효율이 낮은 상기 재생히터(465)의 사용량을 줄여 에너지효율을 더욱 높일 수 있다. Conversely, as the second regenerated refrigerant evaporates in the second module heat exchanger 930, the second regenerated refrigerant can absorb heat from the third main refrigerant flowing through the second module heat exchanger 930. At this time, because the temperature of the third main refrigerant is high, the amount of heat absorption may increase. Accordingly, the operating low pressure of the second regenerative refrigerant cycle constituting the third air conditioning unit (U3) increases, thereby reducing power consumption. The air blowing temperature of the second regenerative heat exchanger 470, which constitutes the second regenerative refrigerant cycle, can be increased to about 40°C or higher and delivered in the direction K3 to the first regenerative heat exchanger 450. The air delivered in this way can be used as regenerative energy for the high-temperature regenerative dehumidifying rotor 460. Therefore, energy efficiency can be further increased by reducing the amount of use of the low-efficiency regenerative heater 465.

특히, 제3메인냉매는 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)에서 증발하면서 공기를 냉각/제습하게 되는데, 상기 제3실내열교환기(430)와 상기 제4실내열교환기(435)를 증발시키기 위해 상기 제2모듈열교환기(930)는 제3메인냉매를 응축시키면서 방열해야 한다. 이 과정에서 발생하는 방열에너지를 제2재생냉매사이클이 흡수하여, 상기 제2재새열교환기가 방열할 때 발생하는 공기 취출온도를 더욱 높일 수 있다. 이에 따라, 상기 제습히터(365)의 사용량을 더욱 줄일 수 있다. In particular, the third main refrigerant cools/dehumidifies the air while evaporating in the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435. In order to evaporate the indoor heat exchanger 435, the second module heat exchanger 930 must dissipate heat while condensing the third main refrigerant. The second regenerative refrigerant cycle absorbs the heat dissipation energy generated in this process, and the air discharge temperature generated when the second regenerative heat exchanger dissipates heat can be further increased. Accordingly, the amount of use of the dehumidification heater 365 can be further reduced.

도 15를 보면, 외부에서 흡입된 외기(OA)는 상기 제3공조유닛(U3)을 구성하는 제2재생열교환기(470)를 통과하면서 가열되고, 가열된 공기는 상기 제1재생열교환기(450)의 방향(K3)으로 전달될 수 있다. 또한, 앞서 제습로터(460)를 통과한 공기가 상기 제3실내열교환기(430)의 방향(K2)으로 전달되면, 제3실내열교환기(430)와 상기 제4실내열교환기(435)를 순서대로 거치게 된다. 이 과정에서 공기는 4차 및 5차 제습이 이루어져 매우 낮은 습도를 가질 수 있다. 그리고, 습도가 낮춰진 공기는 상기 급기구(G3)를 통해서 실내공간으로 공급될 수 있다. Referring to FIG. 15, outside air (OA) sucked in from the outside is heated while passing through the second regenerative heat exchanger 470 constituting the third air conditioning unit (U3), and the heated air is transferred to the first regenerative heat exchanger ( It can be transmitted in the direction (K3) of 450). In addition, when the air that previously passed through the dehumidifying rotor 460 is delivered in the direction K2 of the third indoor heat exchanger 430, the third indoor heat exchanger 430 and the fourth indoor heat exchanger 435 are connected to each other. It goes through in order. In this process, the air undergoes 4th and 5th dehumidification and can have very low humidity. Additionally, air with reduced humidity can be supplied to the indoor space through the air supply opening (G3).

한편, 도 16에는 본 발명의 공기조화기의 제2실시례의 개략적인 구성이 도시되어 있다. 앞선 실시례와의 차이를 보면, 상기 제3공조유닛(U3)이 생략될 수 있다. 즉, 제2실시례의 공기조화기는 제1공조유닛(U1)과 제2공조유닛(U2)으로만 구성될 수 있는 것이다. 이때, 외기(OA)는 제1실내열교환기(421), 제2실내열교환기(425), 제습로터(460)를 지나면서 3차에 걸쳐 제습될 수 있다. Meanwhile, Figure 16 shows a schematic configuration of a second embodiment of the air conditioner of the present invention. Looking at the difference from the previous embodiment, the third air conditioning unit (U3) can be omitted. That is, the air conditioner of the second embodiment can be composed of only the first air conditioning unit (U1) and the second air conditioning unit (U2). At this time, the outside air (OA) may be dehumidified three times as it passes through the first indoor heat exchanger 421, the second indoor heat exchanger 425, and the dehumidification rotor 460.

제2실시례에서도, 상기 제2공조유닛(U2)에는 제1열교환모듈(700)이 포함될 수 있다. 상기 제1열교환모듈(700)은 독립된 제1재생냉매를 유동시키면서, 제2실외압축기(210)에서 토출된 제2메인냉매와 열교환시킬 수 있다. In the second embodiment as well, the second air conditioning unit (U2) may include the first heat exchange module 700. The first heat exchange module 700 can flow the independent first regenerative refrigerant and exchange heat with the second main refrigerant discharged from the second outdoor compressor 210.

다음으로, 도 17에는 본 발명의 공기조화기의 제3실시례의 개략적인 구성이 도시되어 있다. 앞선 실시례와의 차이를 보면, 상기 실내기(400)에 포함된 열교환기들은 두 개의 열교환기들이 병렬로 연결될 수 있다. 예를 들어 제1회수열교환기(1410)는 제1-1회수열교환기(1410a)와 제1-2회수열교환기(1410b)가 병렬로 배치될 수 있다. 제1실내열교환기(1421)도 제1-1실내열교환기(1421a)와 제1-2실내열교환기(1421b)가 병렬로 배치되어 하나의 제1실내열교환기(1421)를 구성할 수 있다. Next, Figure 17 shows a schematic configuration of a third embodiment of the air conditioner of the present invention. In a difference from the previous embodiment, the heat exchangers included in the indoor unit 400 may be two heat exchangers connected in parallel. For example, the first recovery heat exchanger 1410 may include a 1-1 recovery heat exchanger 1410a and a 1-2 recovery heat exchanger 1410b arranged in parallel. The first indoor heat exchanger (1421) can also form one first indoor heat exchanger (1421) by arranging the 1-1 indoor heat exchanger (1421a) and the 1-2 indoor heat exchanger (1421b) in parallel. .

이와 같이, 복수의 열교환기들이 서로 병렬연결되어 하나의 열교환기를 구성하면, 공기조화기의 냉각/가열/제습 용량이 증가할 수 있다. 따라서, 공기조화기를 보다 큰 건물이나 공장에 적용할 수 있다. In this way, when a plurality of heat exchangers are connected in parallel to form one heat exchanger, the cooling/heating/dehumidification capacity of the air conditioner can be increased. Therefore, the air conditioner can be applied to larger buildings or factories.

이처럼 복수의 열교환기를 병렬로 구성하기 위한 구조가 도 18 내지 도 20에 도시되어 있다. 도 18을 보면, 제1회수열교환기(1410)는 제1-1회수열교환기(1410a)와 제1-2회수열교환기(1410b)로 구성된 모습이 표현되어 있다. 상기 제1-1회수열교환기(1410a)와 상기 제1-2회수열교환기(1410b)는 서로 상하방향으로 번갈아 배치되는 구조(intertwined coil)를 가질 수 있다. 이처럼 서로 번갈아 배치된 상기 제1-1회수열교환기(1410a)와 상기 제1-2회수열교환기(1410b)는 병렬 연결을 통해 보다 넓은 면적을 확보하고, 공기조화기의 냉각/가열/제습 용량을 증가시킬 수 있다. The structure for configuring a plurality of heat exchangers in parallel like this is shown in FIGS. 18 to 20. Referring to FIG. 18, the first recovery heat exchanger 1410 is depicted as consisting of a 1-1 recovery heat exchanger 1410a and a 1-2 recovery heat exchanger 1410b. The 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) may have a structure in which they are alternately arranged in the vertical direction (intertwined coils). The 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b), which are arranged alternately in this way, secure a larger area through parallel connection, and the cooling/heating/dehumidifying capacity of the air conditioner can increase.

도 19를 보면, 제1회수열교환기(1410)는 제1-1회수열교환기(1410a)와 제1-2회수열교환기(1410b)로 구성된 모습이 표현되어 있다. 상기 제1-1회수열교환기(1410a)와 상기 제1-2회수열교환기(1410b)는 서로 상하방향으로 적층된 구조를 가질 수 있다. 상기 제1-1회수열교환기(1410a)는 상대적으로 위쪽에 배치되고, 상기 제1-2회수열교환기(1410b)는 아래쪽에 배치될 수 있다. 이처럼 서로 적층된 상기 제1-1회수열교환기(1410a)와 상기 제1-2회수열교환기(1410b)는 병렬 연결을 통해 보다 넓은 면적을 확보하고, 공기조화기의 냉각/가열/제습 용량을 증가시킬 수 있다. Referring to FIG. 19, the first recovery heat exchanger 1410 is depicted as consisting of a 1-1 recovery heat exchanger 1410a and a 1-2 recovery heat exchanger 1410b. The 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) may have a structure in which they are stacked in the vertical direction. The 1-1 recovery heat exchanger (1410a) may be located relatively upward, and the 1-2 recovery heat exchanger (1410b) may be located below. The 1-1st recovery heat exchanger (1410a) and the 1-2nd recovery heat exchanger (1410b), which are stacked together in this way, secure a larger area through parallel connection and increase the cooling/heating/dehumidification capacity of the air conditioner. can be increased.

도 20을 보면, 제1회수열교환기(1410)는 제1-1회수열교환기(1410a)와 제1-2회수열교환기(1410b)로 구성된 모습이 표현되어 있다. 상기 제1-1회수열교환기(1410a)와 상기 제1-2회수열교환기(1410b)는 측면을 따라 서로 좌우로 배치된 구조를 가질 수 있다. 상기 제1-1회수열교환기(1410a)는 상대적으로 왼쪽에 배치되고, 상기 제1-2회수열교환기(1410b)는 오른쪽에 배치될 수 있다. 이처럼 서로 좌우로 나뉘어 배치된 상기 제1-1회수열교환기(1410a)와 상기 제1-2회수열교환기(1410b)는 병렬 연결을 통해 보다 넓은 면적을 확보하고, 공기조화기의 냉각/가열/제습 용량을 증가시킬 수 있다. 도시되지는 않았으나, 상기 제1-1회수열교환기(1410a)와 상기 제1-2회수열교환기(1410b)는 정면을 기준으로 좌우배치될 수도 있다. Referring to FIG. 20, the first recovery heat exchanger 1410 is depicted as consisting of a 1-1 recovery heat exchanger 1410a and a 1-2 recovery heat exchanger 1410b. The 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) may have a structure arranged to the left and right of each other along the side surface. The 1-1 recovery heat exchanger (1410a) may be placed relatively on the left, and the 1-2 recovery heat exchanger (1410b) may be placed on the right. In this way, the 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b), which are arranged to the left and right, secure a larger area through parallel connection, and the cooling/heating/heating/ Dehumidification capacity can be increased. Although not shown, the 1-1 recovery heat exchanger (1410a) and the 1-2 recovery heat exchanger (1410b) may be arranged left and right with respect to the front.

이상의 설명은 본 발명의 기술 사상을 예시적으로 설명한 것에 불과한 것으로서, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 본 발명의 본질적인 특성에서 벗어나지 않는 범위에서 다양한 수정 및 변형이 가능할 것이다. 따라서, 본 발명에 개시된 실시례들은 본 발명의 기술 사상을 한정하기 위한 것이 아니라 설명하기 위한 것이고, 이러한 실시례에 의하여 본 발명의 기술 사상의 범위가 한정되는 것은 아니다. 본 발명의 보호 범위는 아래의 청구범위에 의하여 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these examples. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

Claims (20)

서로 독립된 복수의 실외기들을 포함하는 실외유닛;An outdoor unit including a plurality of outdoor units independent from each other; 상기 복수의 실외기들과 연결되고, 외부공기 또는 실내공기를 실내공간으로 공급하는 실내덕트를 형성하며, 내부에는 상기 실내덕트 내부의 공기를 제습하는 제습로터가 배치된 실내유닛;an indoor unit connected to the plurality of outdoor units, forming an indoor duct for supplying outside air or indoor air to an indoor space, and having a dehumidifying rotor disposed therein to dehumidify the air inside the indoor duct; 상기 실외유닛과 상기 실내유닛의 사이에 배치되고, 상기 실외유닛과 상기 실내유닛 사이로 메인냉매를 전달하는 전달유닛;과A delivery unit disposed between the outdoor unit and the indoor unit and delivering main refrigerant between the outdoor unit and the indoor unit; and 상기 전달유닛과 상기 실내유닛의 사이에 배치되고, 상기 메인냉매와 독립적으로 유동하는 재생냉매를 압축하는 모듈압축기와, 상기 메인냉매와 상기 재생냉매가 각각 순환되는 모듈열교환기를 포함하는 열교환유닛;을 포함하고, A heat exchange unit disposed between the delivery unit and the indoor unit and including a module compressor for compressing regenerative refrigerant flowing independently of the main refrigerant, and a module heat exchanger through which the main refrigerant and the regenerative refrigerant are circulated, respectively. Contains, 상기 모듈열교환기는 상기 메인냉매를 응축시키고, 상기 재생냉매를 증발시키며, The module heat exchanger condenses the main refrigerant and evaporates the regenerated refrigerant, 상기 모듈열교환기는 상기 메인냉매와 상기 재생냉매를 서로 열교환시키는 공기조화기. The module heat exchanger is an air conditioner that exchanges heat between the main refrigerant and the regenerative refrigerant. 청구항 1에 있어서, 상기 실내유닛에는 상기 열교환유닛과 함께 재생냉매사이클을 구성하는 제1재생열교환기가 배치되고, 상기 제1재생열교환기는 상기 모듈압축기에서 압축된 상기 재생냉매를 응축시키며, 상기 제1재생열교환기는 상기 재생냉매를 응축하면서 상기 제습로터로 유동되는 공기에 방열하는 공기조화기. The method according to claim 1, wherein a first regenerative heat exchanger constituting a regenerative refrigerant cycle together with the heat exchange unit is disposed in the indoor unit, the first regenerative heat exchanger condenses the regenerative refrigerant compressed in the module compressor, and the first regenerative heat exchanger condenses the regenerated refrigerant compressed in the module compressor. A regenerative heat exchanger is an air conditioner that condenses the regenerated refrigerant and radiates heat to the air flowing into the dehumidifying rotor. 청구항 1에 있어서, 상기 실내유닛에는 The method according to claim 1, wherein the indoor unit includes 상기 실내덕트 내부의 공기를 상기 메인냉매와 열교환시키는 복수의 실내열교환기들;과A plurality of indoor heat exchangers that heat exchange the air inside the indoor duct with the main refrigerant; and 상기 실내덕트 내부의 공기가 외부로 배출되는 제1배기구에 배치되고, 상기 복수의 실외기들 중 어느 하나 및 상기 실내열교환기들과 함께 메인냉매사이클을 구성하는 제1회수열교환기;가 더 포함되고, A first recovery heat exchanger disposed at a first exhaust port through which air inside the indoor duct is discharged to the outside, and constituting a main refrigerant cycle together with any one of the plurality of outdoor units and the indoor heat exchangers, is further included, 상기 제1회수열교환기는 상기 제1배기구를 통해 외부로 배출되는 배기와 상기 메인냉매 사이를 서로 열교환시키는 공기조화기. The first recovery heat exchanger is an air conditioner that exchanges heat between the main refrigerant and the exhaust discharged to the outside through the first exhaust port. 청구항 1에 있어서, 상기 실외유닛은 서로 독립된 제1실외기, 제2실외기 및 제3실외기를 포함하고, 상기 메인냉매는 상기 제1실외기에서 압축되는 제1메인냉매, 상기 제2실외기에서 압축되는 제2메인냉매 및 상기 제3실외기에서 압축되는 제3메인냉매를 포함하며, The method according to claim 1, wherein the outdoor unit includes a first outdoor unit, a second outdoor unit, and a third outdoor unit that are independent from each other, and the main refrigerant is a first main refrigerant compressed in the first outdoor unit, and a second outdoor unit compressed in the second outdoor unit. It includes a second main refrigerant and a third main refrigerant compressed in the third outdoor unit, 상기 실내유닛은 The indoor unit is 상기 제1실외기와 함께 제1메인냉매사이클을 구성하는 제1실내열교환기, 제2실내열교환기 및 제1회수열교환기; A first indoor heat exchanger, a second indoor heat exchanger, and a first recovery heat exchanger that together with the first outdoor unit constitute a first main refrigerant cycle; 상기 제2실외기와 함께 제2메인냉매사이클을 구성하는 제2회수열교환기;와A second recovery heat exchanger constituting a second main refrigerant cycle together with the second outdoor unit; and 상기 제3실외기와 함께 제3메인냉매사이클을 구성하는 제3실내열교환기 및 제4실내열교환기;를 포함하는 공기조화기. An air conditioner comprising a third indoor heat exchanger and a fourth indoor heat exchanger, which together with the third outdoor unit constitute a third main refrigerant cycle. 청구항 4에 있어서, 상기 전달유닛은The method of claim 4, wherein the delivery unit is 상기 제1실외기와 상기 실내유닛 사이에 배치되고, 상기 제1실외기와 상기 실내유닛 사이로 제1메인냉매를 전달하는 제1전달모듈;a first delivery module disposed between the first outdoor unit and the indoor unit and transferring a first main refrigerant between the first outdoor unit and the indoor unit; 상기 제2실외기와 상기 실내유닛 사이에 배치되고, 상기 제2실외기와 상기 실내유닛 사이로 제2메인냉매를 전달하는 제2전달모듈;과A second delivery module disposed between the second outdoor unit and the indoor unit and transferring a second main refrigerant between the second outdoor unit and the indoor unit; and 상기 제3실외기와 상기 실내유닛 사이에 배치되고, 상기 제3실외기와 상기 실내유닛 사이로 제3메인냉매를 전달하는 제3전달모듈;을 포함하고, A third delivery module is disposed between the third outdoor unit and the indoor unit and transfers a third main refrigerant between the third outdoor unit and the indoor unit, 상기 열교환유닛은The heat exchange unit is 상기 제2전달모듈과 상기 실내유닛 사이에 배치되고, 제1재생냉매를 작동시키는 제1열교환모듈;과A first heat exchange module disposed between the second transfer module and the indoor unit and operating the first regenerated refrigerant; and 상기 제3전달모듈과 상기 실내유닛 사이에 배치되고, 제2재생냉매를 작동시키는 제2열교환모듈;을 포함하는 공기조화기. An air conditioner comprising a second heat exchange module disposed between the third transfer module and the indoor unit and operating a second regenerated refrigerant. 청구항 5에 있어서, 상기 제1열교환모듈은 The method of claim 5, wherein the first heat exchange module is 제1재생냉매를 압축하는 제1모듈압축기;A first module compressor that compresses the first regenerative refrigerant; 상기 제1재생열교환기와 연결되고, 응축된 제1재생냉매를 팽창시키는 제1모듈팽창변;a first module expansion valve connected to the first regenerative heat exchanger and expanding the condensed first regenerative refrigerant; 상기 제1재생냉매를 증발시키고, 상기 제1메인냉매를 응축시키는 제1모듈열교환기;를 포함하는 공기조화기.An air conditioner comprising a first module heat exchanger that evaporates the first regenerated refrigerant and condenses the first main refrigerant. 청구항 6에 있어서, 상기 제2열교환모듈은 The method of claim 6, wherein the second heat exchange module 상기 제2재생냉매를 압축하는 제2모듈압축기;a second module compressor that compresses the second regenerated refrigerant; 상기 실내유닛의 제2재생열교환기와 연결되고, 응축된 제2재생냉매를 팽창시키는 2모듈팽창변;a two-module expansion valve connected to the second regenerative heat exchanger of the indoor unit and expanding the condensed second regenerative refrigerant; 상기 제2재생냉매를 증발시키고, 상기 제2메인냉매를 응축시키는 제2모듈열교환기;를 포함하는 공기조화기.An air conditioner comprising a second module heat exchanger that evaporates the second regenerative refrigerant and condenses the second main refrigerant. 청구항 5에 있어서, 상기 복수의 실내열교환기들에는 The method according to claim 5, wherein the plurality of indoor heat exchangers 상기 제1전달모듈과 연결되는 제1실내열교환기 및 제2실내열교환기;와A first indoor heat exchanger and a second indoor heat exchanger connected to the first transfer module; and 상기 제3전달모듈과 연결되는 제3실내열교환기 및 제4실내열교환기;가 포함되고,A third indoor heat exchanger and a fourth indoor heat exchanger connected to the third transfer module are included, 상기 제1실내열교환기와 상기 제2실내열교환기는 상기 실내덕트의 경로를 따라 연속적으로 배치되는 공기조화기.An air conditioner wherein the first indoor heat exchanger and the second indoor heat exchanger are continuously arranged along a path of the indoor duct. 청구항 8에 있어서, 상기 제3실내열교환기와 상기 제4실내열교환기는 상기 실내덕트의 경로를 따라 연속적으로 배치되고, 상기 제3실내열교환기는 상기 제습로터를 사이에 두고 상기 제2실내열교환기의 반대편에 배치되는 공기조화기. The method according to claim 8, wherein the third indoor heat exchanger and the fourth indoor heat exchanger are continuously arranged along the path of the indoor duct, and the third indoor heat exchanger is located on the opposite side of the second indoor heat exchanger with the dehumidification rotor interposed therebetween. Air conditioner placed in. 청구항 5에 있어서, 상기 제1회수열교환기는 상기 제1전달모듈, 제1실내열교환기 및 제2실내열교환기와 각각 냉매배관으로 연결되는 공기조화기.The air conditioner according to claim 5, wherein the first recovery heat exchanger is connected to the first transfer module, the first indoor heat exchanger, and the second indoor heat exchanger through refrigerant pipes, respectively. 청구항 5에 있어서, 상기 제1전달모듈은The method of claim 5, wherein the first transmission module 상기 제1실외기와 상기 실내유닛 사이의 냉매흐름을 제어하는 제1냉매분배밸브;와A first refrigerant distribution valve that controls the flow of refrigerant between the first outdoor unit and the indoor unit; and 상기 제1실내열교환기와 상기 제1실외기에 구비된 제1실외압축기 사이를 연결하는 제1저압관을 유동하는 제1메인냉매와, 상기 제2실내열교환기와 상기 제1실외열교환기 사이를 연결하는 제1액관을 유동하는 제1메인냉매 사이를 열교환시키는 제1냉매열교환기;를 포함하는 공기조화기.A first main refrigerant flowing through a first low-pressure pipe connecting between the first indoor heat exchanger and a first outdoor compressor provided in the first outdoor unit, and a first main refrigerant flowing between the second indoor heat exchanger and the first outdoor heat exchanger. An air conditioner comprising a first refrigerant heat exchanger that exchanges heat between the first main refrigerant flowing in the first liquid pipe. 청구항 5에 있어서, 상기 제1전달모듈은 상기 제1실외압축기에 의해 압축된 제1메인냉매를 상기 복수의 실내열교환기들 중 일부 또는 상기 제1회수열교환기 중 적어도 어느 하나로 전달하는 공기조화기.The method according to claim 5, wherein the first delivery module is an air conditioner that transfers the first main refrigerant compressed by the first outdoor compressor to at least one of the plurality of indoor heat exchangers or the first recovery heat exchanger. . 청구항 11에 있어서, 상기 제1실내열교환기는 상기 제1냉매열교환기와 직접 연결되고, 상기 제2실내열교환기는 상기 제1냉매분배밸브를 거쳐 상기 제1냉매열교환기와 연결되는 공기조화기.The air conditioner according to claim 11, wherein the first indoor heat exchanger is directly connected to the first refrigerant heat exchanger, and the second indoor heat exchanger is connected to the first refrigerant heat exchanger via the first refrigerant distribution valve. 청구항 5에 있어서, 상기 제2전달모듈은 상기 제2실외기의 제2실외압축기에 의해 압축된 제2메인냉매를 상기 열교환유닛으로 전달하는 공기조화기.The air conditioner according to claim 5, wherein the second transfer module transfers the second main refrigerant compressed by the second outdoor compressor of the second outdoor unit to the heat exchange unit. 청구항 2에 있어서, 상기 제습로터와 상기 제1재생열교환기의 사이에는 상기 제습로터를 재생시키는 재생히터가 배치되는 공기조화기.The air conditioner according to claim 2, wherein a regenerative heater for regenerating the dehumidifying rotor is disposed between the dehumidifying rotor and the first regenerative heat exchanger. 청구항 1에 있어서, 상기 실내유닛에는 The method according to claim 1, wherein the indoor unit includes 상기 실내덕트 내부의 공기를 외부로 배출하고, 제1회수열교환기가 배치되는 상기 제1배기구;와The first exhaust port discharges the air inside the indoor duct to the outside and where the first recovery heat exchanger is disposed; And 상기 제1배기구와 독립되게 구비되고, 상기 실내덕트 내부의 공기를 외부로 배출하며, 외부로 배출되는 배기와 메인냉매를 열교환시키는 제2회수열교환기가 배치되는 제2배기구;가 포함되는 공기조화기.An air conditioner including a second exhaust port, which is provided independently of the first exhaust port, discharges air inside the indoor duct to the outside, and is disposed with a second recovery heat exchanger that exchanges heat between the exhaust exhaust discharged to the outside and the main refrigerant. . 청구항 4에 있어서, 상기 제습로터는 상기 제1재생열교환기와 상기 제2회수열교환기의 사이에 배치되는 공기조화기.The air conditioner according to claim 4, wherein the dehumidification rotor is disposed between the first regenerative heat exchanger and the second recovery heat exchanger. 청구항 5에 있어서, 상기 제2전달모듈은The method of claim 5, wherein the second transmission module 상기 제2실외기와 상기 제1열교환모듈 사이에서 제2메인냉매의 흐름을 제어하는 제2냉매분배밸브;와A second refrigerant distribution valve that controls the flow of the second main refrigerant between the second outdoor unit and the first heat exchange module; 상기 제2회수열교환기와 상기 제2실외기의 제2실외압축기 사이를 연결하는 제2저압관을 유동하는 제2메인냉매와, 상기 제2실외기의 제2실외열교환기와 상기 열교환유닛 사이를 연결하는 제2액관을 유동하는 제2메인냉매 사이를 열교환시키는 제2냉매열교환기;를 포함하는 공기조화기.A second main refrigerant flowing through a second low-pressure pipe connected between the second recovery heat exchanger and the second outdoor compressor of the second outdoor unit, and a second main refrigerant connected between the second outdoor heat exchanger of the second outdoor unit and the heat exchange unit. An air conditioner comprising a second refrigerant heat exchanger that exchanges heat between the second main refrigerant flowing in the two liquid pipes. 청구항 5에 있어서, 상기 제1실외기와 상기 제1전달모듈은 냉매배관을 통해 연결되고, 상기 냉매배관은 The method according to claim 5, wherein the first outdoor unit and the first transmission module are connected through a refrigerant pipe, and the refrigerant pipe is 상기 제1실외기의 제1실외압축기의 흡입부와 상기 제1전달모듈 사이를 연결하는 제1저압관;a first low-pressure pipe connecting between the suction part of the first outdoor compressor of the first outdoor unit and the first transmission module; 상기 제1실외압축기의 토출부와 상기 제1전달모듈 사이를 연결하는 제1고압관;및A first high-pressure pipe connecting the discharge portion of the first outdoor compressor and the first delivery module; And 상기 제1실외기의 제1실외열교환기와 상기 제1전달모듈 사이를 연결하는 제1액관;을 포함하는 공기조화기.An air conditioner including a first liquid pipe connecting the first outdoor heat exchanger of the first outdoor unit and the first transfer module. 청구항 1에 있어서, 상기 실외유닛, 상기 실내유닛, 상기 전달유닛 및 상기 열교환유닛은 외기온도 또는 외기습도 조건에 따라 구분되는 제1공조모드, 제2공조모드 또는 제3공조모드로 동작되고, 상기 제1공조모드, 제2공조모드 또는 제3공조모드는 메인제어부에 의해 제어되는 공기조화기.The method according to claim 1, wherein the outdoor unit, the indoor unit, the transfer unit, and the heat exchange unit are operated in a first air conditioning mode, a second air conditioning mode, or a third air conditioning mode depending on outdoor temperature or outdoor humidity conditions, The first air conditioning mode, second air conditioning mode, or third air conditioning mode is an air conditioner controlled by the main control unit.
PCT/KR2024/000542 2023-01-11 2024-01-11 Air conditioner Ceased WO2024151104A1 (en)

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