[go: up one dir, main page]

WO2019146502A1 - Dispositif de climatisation - Google Patents

Dispositif de climatisation Download PDF

Info

Publication number
WO2019146502A1
WO2019146502A1 PCT/JP2019/001336 JP2019001336W WO2019146502A1 WO 2019146502 A1 WO2019146502 A1 WO 2019146502A1 JP 2019001336 W JP2019001336 W JP 2019001336W WO 2019146502 A1 WO2019146502 A1 WO 2019146502A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
indoor
radiation
circuit
refrigerant
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/JP2019/001336
Other languages
English (en)
Japanese (ja)
Inventor
宏 海老名
長谷川　隆
聡通 仲山
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of WO2019146502A1 publication Critical patent/WO2019146502A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/009—Indoor units, e.g. fan coil units characterised by heating arrangements
    • F24F1/0093—Indoor units, e.g. fan coil units characterised by heating arrangements with additional radiant heat-discharging elements, e.g. electric heaters
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible 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
    • F25B13/00—Compression machines, plants or systems, with reversible 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel

Definitions

  • the present disclosure relates to an air conditioner.
  • Patent Document 1 discloses an air conditioner provided with a radiation type indoor unit and a convection type indoor unit.
  • the radiation type indoor unit and the convection type indoor unit are connected in series to the refrigerant circuit.
  • the refrigerant dissipates heat and condenses in the heating element of the radiation type indoor unit.
  • the refrigerant further dissipates heat and condenses in the convection side indoor unit.
  • An object of the present disclosure is to provide an air conditioner that can individually control the flow rate of the refrigerant flowing through the indoor heat exchanger and the flow rate of the refrigerant flowing through the radiant heat exchanger.
  • An air conditioner comprising a refrigerant circuit (11) including an indoor circuit (13) and a radiation circuit (15) to which the radiant heat exchanger (52) and the second control valve (51) are connected, In the refrigerant circuit (11), the indoor circuit (13) and the radiation circuit (15) are connected in parallel.
  • the refrigerant is diverted to the indoor circuit (13) and the radiation circuit (15).
  • the flow rates of the refrigerant flowing through the indoor heat exchanger (31) and the flow rates of the refrigerant flowing through the radiant heat exchanger (52) are controlled by controlling the opening degree of the first control valve (32) and the second control valve (51) respectively. And can be adjusted individually.
  • a 2nd aspect is a 1st aspect
  • the said outdoor circuit (12) is provided in the outdoor unit (20)
  • the said indoor circuit (13) is provided in the indoor unit (30)
  • the said radiation circuit ( 15) is an air conditioner characterized in that the radiation panel (40) is provided.
  • the capacity of the indoor unit (30) and the capacity of the radiation panel (40) are individually controlled by controlling the opening degree of the first control valve (32) and the second control valve (51) respectively. Can be controlled.
  • the refrigerant circuit (11) branches from a gas communication pipe (16) connected to the outdoor heat exchanger (22), and the gas communication pipe (16) And a gas pipe (54) connected to the radiant heat exchanger (52), wherein the inside diameter of the gas pipe (54) is smaller than the inside diameter of the gas communication pipe (16) It is a harmony device.
  • the flow velocity of the refrigerant flowing through the gas pipe (54) can be suppressed from becoming too small.
  • the refrigerant circuit (11) comprises at least one of the indoor heat exchanger (31) and at least one of the radiant heat exchanger (52).
  • the air conditioner is characterized in that it is configured to perform a refrigeration cycle in which the heat sink becomes a radiator.
  • the heating capacity of the indoor heat exchanger (31) and the heating capacity of the radiant heat exchanger (52) can be individually controlled.
  • the refrigerant circuit (11) includes at least one of the indoor heat exchanger (31) and at least one of the radiant heat exchanger (52).
  • the air conditioner is characterized in that it is configured to perform a refrigeration cycle in which the one and the other become an evaporator.
  • the cooling capacity of the indoor heat exchanger (31) and the cooling capacity of the radiant heat exchanger (52) can be controlled separately.
  • one of the indoor heat exchanger (31) and the radiant heat exchanger (52) is a radiator. It is an air conditioner characterized in that it is configured to perform a refrigeration cycle in which the other is an evaporator.
  • the refrigerant on the outflow side of the radiant heat exchanger (52) has an excess during the refrigeration cycle in which the radiant heat exchanger (52) is a radiator.
  • a control unit (C2) for controlling the degree of opening of the second control valve (51) such that the degree of cooling reaches a predetermined value is an air conditioner characterized in that
  • the degree of supercooling of the opening degree of the second control valve (51) is controlled during the refrigeration cycle in which the heating operation is performed by the radiant heat exchanger (52).
  • the superheat degree of the refrigerant on the outflow side of the radiant heat exchanger (52) during the operation in which the radiant heat exchanger (52) becomes an evaporator is provided.
  • a control unit (C2) is provided to control the opening degree of the second control valve (51) so that the value of d becomes a predetermined value.
  • the degree of superheat control of the opening degree of the first control valve (32) is performed during the refrigeration cycle in which the cooling operation is performed by the radiant heat exchanger (52).
  • a ninth aspect is the air conditioning apparatus according to any one of the second to eighth aspects, wherein the rated cooling capacity of the entire air conditioning apparatus is 7.1 kW or more.
  • the total of the rated capacities of the indoor unit (30) and the radiation panel (40) is in the range of 50% to 200% of the rated capacity of the outdoor unit (20). It is an air conditioner characterized by things.
  • the cooling operation is performed only with the radiant heat exchanger (52) among the indoor heat exchanger (31) and the radiant heat exchanger (52).
  • An air conditioning apparatus characterized by performing a cooling operation to be performed.
  • the twelfth aspect is the heating according to any one of the first to eleventh, wherein the heating operation is performed only with the radiant heat exchanger (52) among the indoor heat exchanger (31) and the radiant heat exchanger (52). It is an air conditioner characterized by performing operation.
  • FIG. 1 is a piping system diagram showing a schematic configuration of the air conditioning apparatus according to the first embodiment.
  • FIG. 2 is a front view showing a schematic configuration of the radiation panel according to the first embodiment.
  • FIG. 3 is a schematic block diagram of the air conditioning apparatus according to the first embodiment.
  • FIG. 4 is a piping system diagram showing a schematic configuration of the air conditioning apparatus according to the second embodiment.
  • FIG. 5 is a piping system diagram showing a schematic configuration of the air conditioning apparatus according to Embodiment 2, to which the flow of the refrigerant in the cooling operation is applied.
  • FIG. 6 is a piping system diagram showing a schematic configuration of the air conditioning apparatus according to Embodiment 2, to which a flow of refrigerant for heating operation is applied.
  • FIG. 1 is a piping system diagram showing a schematic configuration of the air conditioning apparatus according to the first embodiment.
  • FIG. 2 is a front view showing a schematic configuration of the radiation panel according to the first embodiment.
  • FIG. 3 is a schematic
  • FIG. 7 is a piping system diagram showing a schematic configuration of the air conditioning apparatus according to Embodiment 2, to which the flow of the refrigerant in the first simultaneous heating and cooling operation is given.
  • FIG. 8 is a piping diagram showing a schematic configuration of the air conditioning apparatus according to Embodiment 2, to which the flow of the refrigerant in the second simultaneous heating and cooling operation is given.
  • FIG. 9 is a piping diagram showing a schematic configuration of the air conditioning apparatus according to the third embodiment.
  • Embodiment 1 An air conditioner (10) of the first embodiment will be described with reference to the drawings.
  • the air conditioner (10) switches between cooling and heating of the room.
  • the air conditioner (10) includes an outdoor unit (20), an indoor unit (30), and a radiation panel (40).
  • the outdoor unit (20) is installed outdoors.
  • the outdoor unit (20) constitutes a heat source unit.
  • the outdoor unit (20) is provided with a compressor (21), an outdoor heat exchanger (22), an outdoor expansion valve (23), a four-way switching valve (24), and an outdoor fan (25).
  • the indoor unit (30) is provided near the ceiling of the room.
  • the indoor unit (30) constitutes a convection type indoor unit that performs cooling or heating by the air conveyed by the indoor fan (33).
  • the number of indoor units (30) is one or more.
  • Each indoor unit (30) is provided with an indoor heat exchanger (31), an indoor expansion valve (32), and an indoor fan (33).
  • the radiation panel (40) is installed on the floor of the room.
  • the radiation panel (40) constitutes a radiation type indoor unit that performs cooling or heating by the movement of radiant heat.
  • the number of radiation panels (40) is one or more.
  • the air conditioner (10) is configured with a refrigerant circuit (11) in which the filled refrigerant circulates. Details of the refrigerant circuit (11) will be described later.
  • the radiation panel (40) includes a pair of support columns (41), a panel body (52) (also referred to as a radiation heat exchanger (52)), and a bottom plate (42).
  • the columns (41) are provided one each at the left and right ends of the radiation panel (40).
  • Each support post (41) is erected on the floor surface and extends in the vertical direction.
  • the panel body (52) is provided between the pair of columns (41). The front and back surfaces of the panel body (52) are exposed to the indoor space.
  • the bottom plate (42) extends laterally between the pair of columns (41) so as to be connected to the lower ends of the pair of columns (41).
  • the bottom plate (42) is fixed to the floor of the room via a fastening member (not shown) such as an anchor bolt.
  • the upper ends of the pair of columns (41) are connected to a ceiling side suspension bolt (not shown) via a fixing portion (43).
  • a lower accommodation room (44) is formed below the panel body (52).
  • the lower accommodation chamber (44) is provided with a drain pan (45) for recovering the dew condensation water generated from the panel body (52).
  • the open front and rear sides of the lower accommodation chamber (44) are covered by the lower cover (46), respectively.
  • Each lower cover (46) is removably attached, for example, to the lower part of a pair of support posts (41).
  • an upper storage chamber (47) is formed on the upper side of the panel body (52).
  • a liquid pipe (53) and a gas pipe (54) of the refrigerant pipe are accommodated in the upper accommodation chamber (47).
  • a radiation expansion valve (50) (not shown in FIG. 2) is connected to the liquid pipe (53).
  • the open front and rear sides of the upper accommodation chamber (47) are covered by the upper cover (48), respectively.
  • Each upper cover (48) is removably attached, for example, to the top of a pair of support posts (41).
  • the refrigerant circuit (11) includes an outdoor circuit (12), an indoor circuit (13), and a radiation circuit (15).
  • the outdoor circuit (12) is provided in the outdoor unit (20)
  • the indoor circuit (13) is provided in the indoor unit (30)
  • the radiation circuit (15) is provided in the radiation panel (40).
  • the indoor unit (30) and the radiation panel (40) are connected to the outdoor unit (20) via the two connection pipes (16, 17).
  • the indoor circuit (13) and the radiation circuit (15) are connected to the outdoor circuit (12) via a gas communication pipe (16) and a liquid communication pipe (17) as communication pipes.
  • a compressor (21), an outdoor heat exchanger (22), an outdoor expansion valve (23), and a four-way switching valve (24) are connected to the outdoor circuit (12).
  • the compressor (21) is configured as a variable displacement type. More specifically, the amount of refrigerant circulation in the refrigerant circuit (11) can be adjusted by controlling the operating frequency of the compressor (21) by the inverter device.
  • an outdoor fan (25) for conveying outdoor air is provided in the vicinity of the outdoor heat exchanger (22).
  • the outdoor expansion valve (23) is a flow control valve having a variable opening degree, and is formed of, for example, an electronic expansion valve.
  • the four-way switching valve (24) constitutes a switching mechanism for switching between the heating operation and the cooling operation.
  • the four-way switching valve (24) is configured to be switchable between a first state (a state shown by a solid line in FIG. 1) and a second state (a state shown by a broken line in FIG. 1).
  • the four-way switching valve (24) switches to the first state in the cooling operation.
  • the four-way switching valve (24) in the first state communicates the discharge side of the compressor (21) with the gas end of the outdoor heat exchanger (22), and at the same time, makes gas communication with the suction side of the compressor (21). Bring the pipe (16) into communication.
  • the four-way switching valve (24) switches to the second state in the heating operation.
  • the four-way switching valve (24) in the second state brings the discharge side of the compressor (21) into communication with the gas communication pipe (16), and at the same time the suction side of the compressor (21) and the outdoor heat exchanger (22) Communicate with the end of the gas.
  • the outdoor circuit (12) is provided with a discharge pressure sensor (61) and a suction pressure sensor (62).
  • the discharge pressure sensor (61) is provided on the discharge side of the compressor (21).
  • the discharge pressure sensor (61) detects the pressure (the high pressure pressure of the refrigerant circuit (11)) of the refrigerant discharged from the compressor (21).
  • the suction pressure sensor (62) detects the pressure of the suction refrigerant of the compressor (21) (the low pressure of the refrigerant circuit (11)).
  • the number of indoor circuits (13) corresponds to the number of indoor units (30).
  • One end (liquid end) of the indoor circuit (13) is connected to the liquid communication pipe (17).
  • the other end (gas end) of the indoor circuit (13) is connected to a gas communication pipe (16).
  • the indoor expansion valve (32) and the indoor heat exchanger (31) are connected to the indoor circuit (13) in order from the liquid end to the gas end.
  • the indoor expansion valve (32) is a flow control valve (first control valve) having a variable opening degree, and is formed of, for example, an electronic expansion valve.
  • an indoor fan (33) for conveying indoor air is provided in the vicinity of the indoor heat exchanger (31).
  • the refrigerant flowing inside thereof exchanges heat with the indoor air conveyed by the indoor fan (33).
  • the indoor circuit (13) is provided with a first liquid side temperature sensor (63) and a first gas side temperature sensor (64).
  • the first liquid side temperature sensor (63) is provided on the liquid side of the indoor heat exchanger (31), and detects the temperature of the liquid refrigerant flowing through the indoor circuit (13).
  • the first gas side temperature sensor (64) is provided on the gas side of the indoor heat exchanger (31) and detects the temperature of the gas refrigerant flowing through the indoor circuit (13).
  • the number of radiation circuits (15) corresponds to the number of radiation panels (40).
  • One end (liquid end) of the radiation circuit (15) is connected to the liquid communication pipe (17).
  • the other end (gas end) of the radiation circuit (15) is connected to a gas communication pipe (16).
  • a radiation expansion valve (51) and a radiation heat exchanger (52) are connected to the radiation circuit (15) in order from the liquid end to the gas end.
  • the radiation expansion valve (51) is a flow control valve (second control valve) having a variable opening degree, and is formed of, for example, an electronic expansion valve.
  • a fan for conveying air is not provided. That is, the radiant heat exchanger (52) exchanges heat between the refrigerant and the indoor air by the transfer of radiant heat.
  • the radiation circuit (15) is provided with a second liquid side temperature sensor (65) and a second gas side temperature sensor (66).
  • the second liquid side temperature sensor (65) is provided on the liquid side (liquid pipe (53)) of the radiant heat exchanger (52), and detects the temperature of the liquid refrigerant flowing through the radiation circuit (15).
  • the second gas side temperature sensor (66) is provided on the gas side (gas pipe (54)) of the radiant heat exchanger (52), and detects the temperature of the gas refrigerant flowing through the radiation circuit (15).
  • the gas pipe (54) branches from the gas communication pipe (16).
  • the inner diameter of the gas pipe (54) of the present embodiment is smaller than the inner diameter of the gas communication pipe (16).
  • the gas pipe (54) is constituted by a so-called three-minute pipe (a pipe having a 3/8 inch diameter), and the gas connection pipe (16) is a so-called four-minute pipe (a piping having a 4/8 inch diameter) It consists of For this reason, the gas communication pipe (16) and the gas pipe (54) are connected to each other via a different diameter joint (not shown).
  • the air conditioner (10) is provided with a remote controller (70) for operating the air conditioner (10).
  • the remote controller (70) is provided with a display unit such as a liquid crystal monitor, operation buttons, and the like.
  • the remote control (70) can set the indoor set temperature Ts.
  • the remote controller (70) of the present embodiment is provided with an indoor temperature sensor (71) for detecting the indoor temperature Tr.
  • the remote controller (70) is preferably arranged in the vicinity of the radiation panel (40). In the example of FIG. 3, the remote controller (70) is disposed closer to the radiation panel (40) than the other indoor units (30).
  • the indoor unit (30) of the present embodiment is provided with an indoor controller (34), and the radiation panel (40) is provided with a radiation controller (55) (control unit).
  • a radiation controller 55) (control unit).
  • Each of the indoor controller (C1) and the radiation controller (C2) is configured by using a microcomputer and a memory device (specifically, a semiconductor memory) storing software for operating the microcomputer. .
  • the indoor controller (C1) and the radiation controller (C2) can input and output detection signals of various sensors, control signals, and the like.
  • the indoor controller (C1) controls the start / stop (so-called thermo on / thermo off) of the indoor unit (30). More specifically, the indoor controller (C1) stops (thermo-off) the indoor unit (30) when the temperature Tr of the indoor air reaches a predetermined value based on the set temperature Ts.
  • the indoor controller (C1) controls the opening degree of the indoor expansion valve (32) in a so-called superheat degree in the cooling operation. Specifically, in the cooling operation, the opening degree of the indoor expansion valve (32) is adjusted such that the degree of superheat SH1 of the refrigerant after evaporation in the indoor heat exchanger (31) approaches the target degree of superheat.
  • the degree of superheat SH1 is determined, for example, by the difference between the temperature of the refrigerant detected by the first gas side temperature sensor (64) and the saturation temperature corresponding to the low pressure detected by the suction pressure sensor (62).
  • the indoor controller (C1) controls the degree of opening of the indoor expansion valve (32) in so-called supercooling in the heating operation. Specifically, in the heating operation, the degree of opening of the indoor expansion valve (32) is adjusted such that the degree of subcooling SC1 of the refrigerant after condensation in the indoor heat exchanger (31) approaches the target degree of subcooling .
  • the degree of subcooling SC1 is determined, for example, by the difference between the temperature of the refrigerant detected by the first liquid side temperature sensor (63) and the saturation temperature corresponding to the high pressure detected by the discharge pressure sensor (61).
  • the radiation controller (C2) controls the radiation expansion valve (51) to control start / stop of the radiation panel (40) (so-called thermo on / thermo off).
  • the radiation controller (C2) of the present embodiment performs so-called group control in which thermo-on / thermo-off is switched in conjunction with a previously set indoor unit (30). Details of this control will be described later.
  • the radiation controller (C2) controls the opening degree of the radiation expansion valve (51) in a so-called superheat degree in the cooling operation. Specifically, in the heating operation, the opening degree of the radiation expansion valve (51) is adjusted so that the degree of superheat SH2 of the refrigerant after evaporation in the radiant heat exchanger (52) approaches the target degree of superheat.
  • the degree of superheat SH2 is determined, for example, by the difference between the temperature of the refrigerant detected by the second gas side temperature sensor (66) and the saturation temperature corresponding to the low pressure detected by the suction pressure sensor (61).
  • the radiation controller (C2) controls the degree of opening of the radiation expansion valve (51) in so-called supercooling in the heating operation. Specifically, in the heating operation, the degree of opening of the radiation expansion valve (51) is adjusted such that the degree of subcooling SC2 of the refrigerant after condensation in the radiant heat exchanger (52) approaches the target degree of subcooling.
  • the degree of subcooling SC2 is determined, for example, by the difference between the temperature of the refrigerant detected by the second liquid side temperature sensor (65) and the saturation temperature corresponding to the high pressure detected by the discharge pressure sensor (61).
  • the operation of the air conditioner (10) according to the first embodiment will be described with reference to FIG.
  • the air conditioner (10) switches between cooling operation and heating operation.
  • ⁇ Cooling operation> In the cooling operation, the compressor (21), the outdoor fan (25), and the indoor fan (33) are operated.
  • the four-way switching valve (24) is in the first state.
  • the outdoor expansion valve (23) is opened at a predetermined opening (for example, fully open).
  • the degree of superheat of the opening degree of the indoor expansion valve (32) and the radiation expansion valve (51) is controlled.
  • a refrigeration cycle is performed in which the refrigerant condensed and radiated by the outdoor heat exchanger (22) is evaporated by the indoor heat exchanger (31) and the radiant heat exchanger (52).
  • the refrigerant compressed by the compressor (21) flows through the outdoor heat exchanger (22).
  • the refrigerant releases heat to the outdoor air and condenses.
  • the refrigerant condensed by the outdoor heat exchanger (22) passes through the outdoor expansion valve (23) and then flows through the liquid communication pipe (17).
  • the refrigerant flowing through the liquid communication pipe (17) is branched into the indoor circuit (13) and the radiation circuit (15).
  • the refrigerant flowing into the indoor circuit (13) flows through the indoor heat exchanger (31) after being depressurized by the indoor expansion valve (32).
  • the indoor heat exchanger (31) the refrigerant absorbs heat from the air conveyed by the indoor fan (33) and evaporates.
  • the refrigerant evaporated in the indoor heat exchanger (31) flows out to the gas connection pipe (16).
  • the refrigerant flowing into the radiation circuit (15) is reduced in pressure by the radiation expansion valve (51) and then flows through the radiation heat exchanger (52).
  • the radiation heat exchanger (52) the refrigerant absorbs heat from room air around the radiation panel (40) and evaporates.
  • the refrigerant evaporated in the radiant heat exchanger (52) flows out to the gas connection pipe (16).
  • the refrigerant merged in the gas communication pipe (16) is sucked into the compressor (21) and compressed again.
  • ⁇ Heating operation> In the heating operation, the compressor (21), the outdoor fan (25), and the indoor fan (33) are operated. The four-way switching valve (24) is in the second state. The outdoor expansion valve (23) is superheated controlled. The degree of opening of the indoor expansion valve (32) and the radiation panel (40) is subcooled. In the heating operation, a refrigeration cycle is performed in which the refrigerant condensed and radiated by the indoor heat exchanger (31) and the radiant heat exchanger (52) is evaporated by the outdoor heat exchanger (22).
  • the refrigerant compressed by the compressor (21) flows through the gas connection pipe (16) and is branched into the outdoor circuit (12) and the radiation circuit (15).
  • the refrigerant flowing into the indoor circuit (13) flows through the indoor heat exchanger (31).
  • the refrigerant releases heat to the air conveyed by the indoor fan (33) and condenses.
  • the refrigerant condensed by the indoor heat exchanger (31) passes through the indoor expansion valve (32) and then flows out to the liquid communication pipe (17).
  • the refrigerant releases heat to room air around the radiation panel (40) and condenses.
  • the refrigerant condensed by the radiant heat exchanger (52) flows out to the liquid communication pipe (17) after passing through the radiant expansion valve (51).
  • the refrigerant joined in the liquid communication pipe (17) flows into the outdoor circuit (12), is decompressed by the outdoor expansion valve (23), and then flows through the outdoor heat exchanger (22).
  • the outdoor heat exchanger (22) the refrigerant absorbs heat from the outdoor air and evaporates.
  • the refrigerant evaporated in the outdoor heat exchanger (22) is sucked into the compressor (21) and compressed again.
  • Group control In the cooling operation and the heating operation described above, group control is performed in which switching of the heat on / heat off of the radiation panel (40) is performed in conjunction with a predetermined indoor unit (30). This group control will be described with reference to FIG.
  • the second indoor unit (30B) and the radiation panel (40) are set in the same group. For this reason, the radiation panel (40) is switched between thermo on / thermo off so as to interlock with the second indoor unit (30B). On the other hand, in the second indoor unit (30B), the thermo on / thermo off is switched based on the indoor temperature Tr detected by the indoor temperature sensor (71) of the remote controller (70).
  • the indoor temperature Tr detected by the indoor temperature sensor (71) is appropriately input to the indoor controller (C1) of the second indoor unit (30B). For example, it is assumed that the room temperature Tr reaches a predetermined value in the heating operation. In this case, the indoor controller (C1) turns off the second indoor unit (30B). Along with this, for example, the indoor controller (C1) of the second indoor unit (30B) outputs a control signal to the radiation controller (C2). This control signal is a control signal for thermo-off of the radiation panel (40). Therefore, the radiation controller (C2) that received this control signal causes the radiation panel (40) to heat off. As a result, the radiation panel (40) performs the thermo-off at a timing substantially the same as or slightly delayed from the thermo-off of the second indoor unit (30B).
  • the second indoor unit (30B) is again turned on.
  • a control signal is output from the indoor controller (C1) of the second indoor unit (30B) to the radiation controller (C2).
  • This control signal is a control signal for causing the radiation panel (40) to heat on. Therefore, the radiation controller (C2) receiving this control signal causes the radiation panel (40) to heat on.
  • the radiation panel (40) performs thermo-on substantially at the same time as or slightly later than the thermo-on of the second indoor unit (30B).
  • the remote controller (70) (strictly, the indoor temperature sensor (71)) is disposed closer to the radiation panel (40) than the second indoor unit (30B). Therefore, for example, in the heating operation, it is possible to reliably warm the air around the radiation panel (40) while suppressing the frequency of start / stop of the radiation panel (40). This point will be described in detail.
  • the remote controller (70) is disposed closer to the second indoor unit (30B) than the radiation panel (40).
  • the second indoor unit (30B) may be thermo-off even though the air around the radiation panel (40) is not sufficiently warmed up. This is attributed to the fact that the heating capacity of the second indoor unit (30B) is higher than the heating capacity of the radiation panel (40) and that warm air tends to gather on the ceiling side.
  • the radiation panel (40) is also interlocked and the thermo-off, so the comfort around the radiation panel (40) closer to the occupants is impaired.
  • the number of times of starting and stopping of the second indoor unit (30B) and the radiation panel (40) may also increase.
  • the second indoor unit since the indoor temperature sensor (71) is disposed in the vicinity of the radiation panel (40), the second indoor unit (until the air around the radiation panel (40) is sufficiently warmed 30B) and the radiation panel (40) do not heat off. For this reason, it is possible to avoid the loss of comfort around the radiation panel (40), and to reduce the number of start / stop times of the second indoor unit (30B) and the radiation panel (40). The same applies to the cooling operation.
  • the indoor unit (30) is configured with a ceiling-mounted type (strictly, a ceiling-hanging type or a ceiling-embedded type), but this indoor unit (30) is installed on the floor of the room It is good also as a floor-standing type.
  • the indoor unit (30) and the radiation panel (40) share the indoor temperature sensor (71) as described above, the surroundings of both the indoor unit (30) and the radiation panel (40) It is easy to make the temperature converge to the target temperature. As a result, the comfort of the occupant can be further improved.
  • the indoor circuit (13) to which the indoor heat exchanger (31) and the indoor expansion valve (32) are connected, and the radiation circuit to which the radiant heat exchanger (52) and the radiant expansion valve (51) are connected 15) are provided in parallel. For this reason, in the cooling operation and the heating operation described above, the flow rates of the refrigerant flowing through the radiant heat exchanger (52) and the indoor heat exchanger (31) can be individually adjusted.
  • the adjustment range of the capacity of the radiant heat exchanger (52) and the capacity of the indoor heat exchanger (31) is larger than in the case of flowing in series.
  • the lower limit of the capacity of the radiant heat exchanger (52) can be made relatively small. Thereby, for example, a relatively low capacity radiant heat exchanger (52) can be applied to the air conditioner (10).
  • the indoor circuit (13) is provided in the indoor unit (30)
  • the radiation circuit (15) is provided in the radiation panel (40)
  • the indoor unit (30) and the radiation panel (40) are provided in the refrigerant circuit (11). Connected in parallel). Therefore, each capability of the indoor unit (30) and the radiation panel (40) can be individually controlled.
  • the inner diameter of the gas pipe (54) of the radiation circuit (15) is smaller than the inner diameter of the gas connection pipe (16). Since the radiation panel (40) tends to have a smaller capacity than the indoor unit (30), the flow rate of the refrigerant sent to the radiation panel (40) is higher than the flow rate of the refrigerant sent to the indoor unit (30) Less. Therefore, when the inner diameter of the gas pipe (54) is too large, the flow velocity of the refrigerant flowing through the gas pipe (54) becomes excessively small. As a result, for example, refrigeration oil tends to remain inside the gas pipe (54).
  • both the indoor heat exchanger (31) and the radiant heat exchanger (52) are used as radiators, and a refrigeration cycle is performed in which the refrigerant flows in parallel to these. Therefore, in the heating operation, the heating capacity of the indoor unit (30) and the heating capacity of the radiation panel (40) can be adjusted individually.
  • both the indoor heat exchanger (31) and the radiant heat exchanger (52) are used as evaporators, and a refrigeration cycle is performed in which the refrigerant flows in parallel to these. Therefore, in the cooling operation, the cooling capacity of the indoor unit (30) and the cooling capacity of the radiation panel (40) can be adjusted individually.
  • the indoor unit (13) and the radiation circuit (15) are connected in parallel, when only the radiation expansion valve (51) of the radiation expansion valve (51) and the indoor expansion valve (32) is closed, the indoor unit The cooling operation and the heating operation can be executed only by (30). Further, when only the indoor expansion valve (32) of the radiation expansion valve (51) and the indoor expansion valve (32) is closed, the cooling operation and the heating operation of only the radiation panel (40) can be performed. As described above, in the air conditioner (10), the operation for operating both the indoor unit (30) and the radiation panel (40), the operation for operating only the indoor unit (30), and the operation only for the radiation panel (40) It can be easily switched to driving.
  • the cooling capacity of the rating as the whole of an air conditioning apparatus (10) is 7.1 kW or more.
  • the sum total of the rated capacity of the indoor unit (30) and the radiation panel (40) is 50% or more and 200% or less of the rated capacity of the outdoor unit (20).
  • the "rated capacity" as used herein means the larger one of the capacity for cooling operation (cooling capacity) and the capacity for heating operation (heating capacity). Therefore, for example, in the air conditioner (10), when the cooling capacity is larger than the heating capacity, the total of the rated cooling capacities of the indoor unit (30) and the radiation panel (40) in the cooling operation is the outdoor unit in the cooling operation. 50% or more and 200% or less of the rated capacity of 20).
  • the total of the rated heating capacities of the indoor unit (30) and the radiation panel (40) in the heating capacity is the outdoor unit in the heating operation. 50% or more and 200% or less of the rated capacity of 20).
  • the degree of superheat of the opening degree of the radiation expansion valve (51) is controlled in the cooling operation. Therefore, the cooling capacity of the radiant heat exchanger (52) can be optimally adjusted, and the liquid compression of the compressor (21) can be avoided.
  • the degree of supercooling of the opening degree of the radiation expansion valve (51) is controlled in the heating operation.
  • the heating capacity of the radiant heat exchanger (52) can be optimally adjusted.
  • Embodiment 2 The air conditioner (10) according to the second embodiment differs from the first embodiment in the configuration of the refrigerant circuit (11).
  • the air conditioning apparatus (10) according to the second embodiment is configured to be able to execute simultaneous cooling and heating operation (details will be described later) in addition to the cooling operation and the heating operation of the first embodiment. The differences from the first embodiment will be mainly described below.
  • the refrigerant circuit (11) of the first embodiment is provided with three connection pipes (16, 17). Specifically, the first gas communication pipe (16A), the second gas communication pipe (16B), and the liquid communication pipe (17) are connected to the refrigerant circuit (11). That is, the air conditioning apparatus (10) is configured as a so-called three-tube type heating and cooling free type.
  • the air conditioner (10) may be a so-called two-tube cooling / heating free type having two connecting pipes and capable of simultaneous heating and cooling operation.
  • the outdoor circuit (12) includes a first outdoor heat exchanger (22A), a second outdoor heat exchanger (22B), a first outdoor expansion valve (23A), a second outdoor expansion valve (23B), and a first four-way switching.
  • a valve (24A) and a second four-way switching valve (24B) are provided.
  • the first outdoor heat exchanger (22A) and the second outdoor heat exchanger (22B) are connected in parallel to the outdoor circuit (12) so as to approach each other.
  • an outdoor fan (25) shared by these is installed in the vicinity of the first outdoor heat exchanger (22A) and the second outdoor heat exchanger (22B).
  • the first outdoor expansion valve (23A) is connected in series to the liquid side of the first outdoor heat exchanger (22A).
  • the second outdoor expansion valve (23B) is connected in series to the liquid side of the second outdoor heat exchanger (22B).
  • the first four-way switching valve (24A) and the second four-way switching valve (24B) constitute a switching mechanism for switching each operation which will be described in detail later. Specifically, the first four-way switching valve (24A) and the second four-way switching valve (24B) are in the first state (the state shown by the solid line in FIG. 4) and the second state (the state shown by the broken line in FIG. 4). Each is switchable.
  • the first four-way switching valve (24A) and the second four-way switching valve (24B) have one port closed and function substantially as a three-way valve.
  • the first four-way switching valve (24A) in the first state brings the discharge side of the compressor (21) into communication with the gas end of the first outdoor heat exchanger (22A).
  • the second four-way switching valve (24B) in the second state brings the suction side of the compressor (21) into communication with the gas end of the second outdoor heat exchanger (22B).
  • the first four-way switching valve (24A) in the second state brings the suction side of the compressor (21) into communication with the gas end of the first outdoor heat exchanger (22A).
  • the second four-way switching valve (24B) in the second state brings the discharge side of the compressor (21) into communication with the gas end of the second outdoor heat exchanger (22B).
  • the refrigerant circuit (11) of the second embodiment is connected to a first switching circuit (80) corresponding to the indoor circuit (13) and a second switching circuit (90) corresponding to the radiation circuit (15).
  • the first switching circuit (80) and the second switching circuit (90) are switching mechanisms for achieving simultaneous heating and cooling operation.
  • the indoor circuit (13) is connected to the three connection pipes (16A, 16B, 17) via the first switching circuit (80).
  • the radiation circuit (15) is connected to the three connection pipes (16A, 16B, 17) via the second switching circuit (90).
  • the first switching circuit (80) includes a first branch pipe (81), a second branch pipe (82), and a first relay pipe (83).
  • One end of the first branch pipe (81) is connected to the first gas communication pipe (16A), and one end of the second branch pipe (82) is connected to the second gas communication pipe (16B).
  • the other ends of the first branch pipe (81) and the second branch pipe (82) are connected to the gas end of the indoor circuit (13).
  • One end of the first relay pipe (83) is connected to the liquid communication pipe (17).
  • the other end of the first relay pipe (83) is connected to the liquid end of the indoor circuit (13).
  • the first branch pipe (81) is provided with a first on-off valve (84), and the second branch pipe (82) is provided with a second on-off valve (85).
  • the second switching circuit (90) includes a third branch pipe (91), a fourth branch pipe (92), and a second relay pipe (93).
  • One end of the third branch pipe (91) is connected to the first gas communication pipe (16A), and one end of the fourth branch pipe (92) is connected to the second gas communication pipe (16B).
  • the other ends of the third branch pipe (91) and the fourth branch pipe (92) are connected to the gas end of the radiation circuit (15).
  • One end of the second relay pipe (93) is connected to the liquid communication pipe (17).
  • the other end of the second relay pipe (93) is connected to the liquid end of the radiation circuit (15).
  • the third branch pipe (91) is provided with a third on-off valve (94), and the fourth branch pipe (92) is provided with a fourth on-off valve (95).
  • the indoor circuit (13) and the radiation circuit (15) are connected in parallel with each other.
  • the number of indoor circuits (13) and the number of first switching circuits (80) corresponding thereto may be two or more.
  • the number of the radiation circuit (15) and the corresponding second switching circuit (90) may be two or more.
  • the cooling operation, the heating operation, and the simultaneous heating and cooling operation are configured to be switchable.
  • the simultaneous heating and cooling operation includes at least two operations (first simultaneous heating and cooling operation and second simultaneous cooling and heating operation) described later.
  • the indoor unit (30) and the radiation panel (40) perform the cooling operation as in the first embodiment.
  • the compressor (21), the outdoor fan (25), and the indoor fan (33) are operated.
  • the first four-way switching valve (24A) is in the first state
  • the second four-way switching valve (24B) is in the first state.
  • the opening degree of the first outdoor expansion valve (23A) is opened to a predetermined opening degree (for example, full opening).
  • the degree of superheat of the opening degree of the indoor expansion valve (32) and the radiation expansion valve (51) is controlled.
  • the first on-off valve (84) and the third on-off valve (94) are closed, and the second on-off valve (85) and the fourth on-off valve (95) are open.
  • a refrigeration cycle is performed in which the refrigerant condensed and radiated by the outdoor heat exchanger (22) is evaporated by the indoor heat exchanger (31) and the radiant heat exchanger (52).
  • the refrigerant compressed by the compressor (21) flows through the first outdoor heat exchanger (22A).
  • the refrigerant condensed by the first outdoor heat exchanger (22A) flows through the liquid communication pipe (17) after passing through the outdoor expansion valve (23).
  • the refrigerant flowing through the liquid communication pipe (17) is branched into the indoor circuit (13) and the radiation circuit (15).
  • the refrigerant flowing through the indoor circuit (13) is reduced in pressure by the indoor expansion valve (32) and then evaporated in the indoor heat exchanger (31).
  • a cooling operation is performed to cool the indoor air.
  • the refrigerant evaporated in the indoor heat exchanger (31) flows out to the second gas connection pipe (16B) via the second branch pipe (82).
  • the refrigerant flowing through the radiation circuit (15) is depressurized by the radiation expansion valve (51) and then evaporated by the radiation heat exchanger (52). Thereby, in the radiation panel (40), a cooling operation is performed to cool the indoor air.
  • the refrigerant evaporated by the radiation panel (40) flows out to the second gas connection pipe (16B) via the fourth branch pipe (92).
  • the refrigerant joined in the second gas connection pipe (16B) is sucked into the compressor (21) and compressed again.
  • the indoor unit (30) and the radiation panel (40) perform the heating operation as in the first embodiment.
  • the compressor (21), the outdoor fan (25), and the indoor fan (33) are operated.
  • the first four-way switching valve (24A) is in the second state
  • the second four-way switching valve (24B) is in the first state.
  • the opening degree of the first outdoor expansion valve (23A) is subjected to superheat degree control.
  • the degree of supercooling control of the opening degree of the indoor expansion valve (32) and the radiation expansion valve (51) is performed.
  • the first on-off valve (84) and the third on-off valve (94) are opened, and the second on-off valve (85) and the fourth on-off valve (95) are closed.
  • a refrigeration cycle is performed in which the refrigerant condensed and radiated by the indoor heat exchanger (31) and the radiant heat exchanger (52) is evaporated by the outdoor heat exchanger (22).
  • the refrigerant compressed by the compressor (21) flows through the first gas connection pipe (16A) and is diverted to the first switching circuit (80) and the second switching circuit (90).
  • the refrigerant of the first switching circuit (80) flows into the indoor circuit (13) via the first branch pipe (81).
  • the refrigerant of the second switching circuit (90) flows into the radiation circuit (15) via the third branch pipe (91).
  • the refrigerant flowing into the indoor circuit (13) condenses and dissipates heat in the indoor heat exchanger (31).
  • a heating operation is performed in which the indoor air is heated.
  • the refrigerant condensed by the indoor heat exchanger (31) flows out to the liquid communication pipe (17) via the first relay pipe (83).
  • the refrigerant flowing into the radiation circuit (15) condenses and dissipates heat in the radiant heat exchanger (52). Thereby, in the radiation panel (40), a heating operation in which the indoor air is heated is performed.
  • the refrigerant condensed by the radiant heat exchanger (52) flows out to the liquid communication pipe (17) via the second relay pipe (93).
  • the refrigerant joined in the liquid communication pipe (17) flows into the outdoor circuit (12), and is decompressed by, for example, the first outdoor expansion valve (23A), and then evaporated in the first outdoor heat exchanger (22A).
  • the refrigerant evaporated in the first outdoor heat exchanger (22A) is sucked into the compressor (21) and compressed again.
  • the radiation panel (40) performs the cooling operation at the same time as the indoor unit (30) performs the heating operation.
  • the indoor unit (30) and the radiation panel (40) are disposed in different indoor spaces.
  • the first simultaneous cooling operation can also be performed while arranging the indoor unit (30) and the radiation panel (40) in the same indoor space.
  • the compressor (21), the outdoor fan (25), and the indoor fan (33) are operated.
  • the first four-way switching valve (24A) is in the first state
  • the second four-way switching valve (24B) is in the first state.
  • the opening degree of the first outdoor expansion valve (23A) is opened to a predetermined opening degree (for example, full opening).
  • the degree of opening of the indoor expansion valve (32) is subjected to subcooling control.
  • the degree of opening of the radiation expansion valve (51) is controlled at the degree of superheat.
  • the first on-off valve (84) and the fourth on-off valve (95) are opened, and the second on-off valve (85) and the third on-off valve (94) are closed.
  • a refrigeration cycle is performed in which the refrigerant condensed and dissipated in the first outdoor heat exchanger (22A) and the indoor heat exchanger (31) evaporates in the radiant heat exchanger (52).
  • the second outdoor heat exchanger (22B) may be used as an evaporator while controlling the degree of superheat of the opening degree of the second outdoor expansion valve (23B).
  • a part of the refrigerant compressed by the compressor (21) is condensed in the first outdoor heat exchanger (22A), and the rest flows out to the first gas communication pipe (16A).
  • the refrigerant of the first gas connection pipe (16A) flows into the indoor circuit (13) via the first branch pipe (81).
  • the refrigerant flowing into the indoor circuit (13) condenses and dissipates heat in the indoor heat exchanger (31).
  • a heating operation is performed in which the indoor air is heated.
  • the refrigerant condensed by the indoor heat exchanger (31) flows out to the liquid communication pipe (17) via the first relay pipe (83).
  • the refrigerant condensed in the first outdoor heat exchanger (22A) flows out to the liquid communication pipe (17), and joins with the refrigerant condensed in the indoor heat exchanger (31).
  • the refrigerant merged in the liquid communication pipe (17) flows into the radiation circuit (15) via the second relay pipe (93).
  • the refrigerant flowing into the radiation circuit (15) is reduced in pressure by the radiation expansion valve (51) and then evaporated in the radiation heat exchanger (52). Thereby, in the radiation panel (40), a cooling operation is performed to cool the indoor air.
  • the refrigerant evaporated by the radiation panel (40) flows out to the second gas connection pipe (16B) via the fourth branch pipe (92).
  • the refrigerant in the second gas connection pipe (16B) is sucked into the compressor (21) and compressed again.
  • the indoor unit (30) performs the cooling operation and the radiation panel (40) performs the heating operation at the same time.
  • the indoor unit (30) and the radiation panel (40) are arranged in different indoor spaces.
  • the second cooling simultaneous operation can also be performed while arranging the indoor unit (30) and the radiation panel (40) in the same indoor space.
  • the compressor (21), the outdoor fan (25), and the indoor fan (33) are operated.
  • the first four-way switching valve (24A) is in the first state
  • the second four-way switching valve (24B) is in the first state.
  • the opening degree of the first outdoor expansion valve (23A) is opened to a predetermined opening degree (for example, full opening).
  • the degree of opening of the indoor expansion valve (32) is controlled to the degree of superheat.
  • the degree of opening of the radiation expansion valve (51) is subjected to subcooling control.
  • the second on-off valve (85) and the third on-off valve (94) are opened, and the first on-off valve (84) and the fourth on-off valve (95) are closed.
  • a refrigeration cycle is performed in which the refrigerant condensed and dissipated in the first outdoor heat exchanger (22A) and the radiant heat exchanger (52) evaporates in the indoor heat exchanger (31).
  • the second outdoor heat exchanger (22B) may be used as an evaporator while controlling the degree of superheat of the opening degree of the second outdoor expansion valve (23B).
  • a part of the refrigerant compressed by the compressor (21) is condensed in the first outdoor heat exchanger (22A), and the rest flows out to the first gas communication pipe (16A).
  • the refrigerant of the first gas connection pipe (16A) flows into the radiation circuit (15) via the third branch pipe (91).
  • the refrigerant flowing into the radiation circuit (15) condenses and dissipates heat in the radiant heat exchanger (52). Thereby, in the radiation panel (40), a heating operation in which the indoor air is heated is performed.
  • the refrigerant condensed by the radiant heat exchanger (52) flows out to the liquid communication pipe (17) via the second relay pipe (93).
  • the refrigerant condensed in the first outdoor heat exchanger (22A) flows out to the liquid communication pipe (17), and merges with the refrigerant condensed in the radiant heat exchanger (52).
  • the refrigerant joined in the liquid communication pipe (17) flows into the indoor circuit (13) via the second branch pipe (82).
  • the refrigerant flowing into the indoor circuit (13) is depressurized by the indoor expansion valve (32) and then evaporated in the indoor heat exchanger (31).
  • a cooling operation is performed to cool the indoor air.
  • the refrigerant evaporated in the indoor heat exchanger (31) flows out to the second gas connection pipe (16B) via the second branch pipe (82).
  • the refrigerant in the second gas connection pipe (16B) is sucked into the compressor (21) and compressed again.
  • the refrigerant joined in the liquid communication pipe (17) flows into the indoor circuit (13) via the second relay pipe (93).
  • the refrigerant flowing into the indoor circuit (13) is depressurized by the indoor expansion valve (32) and then evaporated in the indoor heat exchanger (31).
  • a heating operation is performed in which the indoor air is heated.
  • the refrigerant evaporated in the indoor unit (30) flows out to the second gas connection pipe (16B) via the second branch pipe (82).
  • the refrigerant in the second gas connection pipe (16B) is sucked into the compressor (21) and compressed again.
  • the indoor circuit (13) and the radiation circuit (15) are connected in parallel. For this reason, in the cooling operation, the flow rates of the refrigerant evaporated in the indoor heat exchanger (31) and the radiant heat exchanger (52) can be individually controlled. Similarly, in the heating operation, the flow rates of the refrigerant condensed in the indoor heat exchanger (31) and the radiant heat exchanger (52) can be individually controlled.
  • the second embodiment it is possible to perform a refrigeration cycle in which one of the indoor heat exchanger (31) and the radiant heat exchanger (52) is a radiator and the other is an evaporator.
  • the indoor heat exchanger (31) is a radiator and the radiation heat exchanger (52) is an evaporator. Therefore, the heating operation can be performed by the indoor unit (30) and the cooling operation can be realized by the radiation panel (40) at the same time.
  • the second simultaneous cooling and heating operation it is possible to perform a refrigeration cycle in which the radiant heat exchanger (52) is a radiator and the indoor heat exchanger (31) is an evaporator. Therefore, the heating operation can be performed by the radiation panel (40) and the cooling operation can be realized by the indoor unit (30) at the same time.
  • Embodiment 3 In the air conditioner (10) according to the third embodiment shown in FIG. 9, the indoor circuit (13) and the radiation circuit (15) are provided in one air conditioning unit (U).
  • the air conditioning unit (U) is configured to be installed on a floor surface in a room.
  • the outdoor unit (20) having the same configuration as that of the first embodiment and the air conditioning unit (U) are connected via the gas communication pipe (16) and the liquid communication pipe (17). Connected to each other.
  • the four-way switching valve (24) is in the first state (state shown by the solid line in FIG. 9) in the cooling operation, and is in the second state (state shown by the broken line in FIG. 9) in the heating operation.
  • the cooling operation and the heating operation of the third embodiment are basically the same as the first embodiment. That is, in the cooling operation, the refrigerant compressed by the compressor (21) is condensed by the outdoor heat exchanger (22) and is evaporated by the indoor heat exchanger (31) and the radiant heat exchanger (52). In the heating operation, the refrigerant compressed by the compressor (21) is condensed by the indoor heat exchanger (31) and the radiant heat exchanger (52), and is evaporated by the outdoor heat exchanger (22).
  • the indoor circuit (13) and the radiation circuit (15) are connected in parallel with each other. Therefore, in the cooling operation and the heating operation, the flow rate of the refrigerant flowing through the indoor circuit (13) and the radiation circuit (15) can be individually controlled by the indoor expansion valve (32) and the radiation expansion valve (51).
  • the cooling operation is performed only with the radiation panel (40) by setting the opening degree of the indoor expansion valve (32) to fully close or zero or opening the radiation expansion valve (51) at a predetermined opening degree. It is possible to Similarly, in the cooling operation, the opening degree of the radiation expansion valve (51) is fully closed or to zero, and the indoor expansion valve (32) is opened at a predetermined opening degree, so that only the indoor heat exchanger (31) cools. It is also possible to perform an operation.
  • the heating operation is performed only with the radiation panel (40) by setting the opening degree of the indoor expansion valve (32) to fully close or zero, and opening the radiation expansion valve (51) at a predetermined opening degree. It is possible to Similarly, in the heating operation, the opening degree of the radiation expansion valve (51) is fully closed or zero, and the indoor expansion valve (32) is opened at a predetermined opening degree, so that heating is performed only with the indoor heat exchanger (31). It is also possible to perform an operation.
  • the indoor unit (30) is a floor-standing type installed on the floor surface or a wall-mounted type installed on a wall surface besides ceiling-mounted type (strictly, ceiling-hanging type or ceiling-embedding type) provided on the ceiling side It may be a formula.
  • the radiation panel (40) may be a ceiling-mounted type provided on the ceiling side or a wall-mounted type provided on a wall surface.
  • the air conditioner (10) may be controlled as in the following embodiments 1 to 3 and other embodiments.
  • the cooling operation of the air conditioner (10) includes a first operation, a second operation, and a third operation.
  • the indoor unit (30) of the indoor unit (30) and the radiation panel (40) performs the cooling operation.
  • the indoor heat exchanger (31) and the radiant heat exchanger (52) only the indoor heat exchanger (31) performs the cooling operation.
  • the indoor expansion valve (32) corresponding to the indoor heat exchanger (31) is opened.
  • the degree of opening of the indoor expansion valve (32) is controlled based on the degree of superheat SH1 of the refrigerant flowing out of the indoor heat exchanger (31).
  • the opening degree of the radiation expansion valve (51) corresponding to the radiation panel (40) is controlled to be fully closed or slightly open.
  • the "small opening degree” referred to herein is an opening degree at which the radiation heat exchanger (52) substantially does not perform the cooling operation.
  • the indoor fan (33) is operated.
  • the outdoor heat exchanger (22) is a condenser or a radiator
  • the indoor heat exchanger (31) is an evaporator
  • the radiation cycle (52) is stopped Is done.
  • the radiation expansion valve (51) corresponding to the radiation heat exchanger (52) is opened.
  • the opening degree of the radiation expansion valve (51) is controlled based on the degree of superheat SH2 of the refrigerant flowing out of the radiation heat exchanger (52).
  • the opening degree of the indoor expansion valve (32) corresponding to the indoor unit (30) is controlled to be fully closed or slightly open.
  • the "small opening degree” referred to herein is an opening degree at which the cooling operation is not substantially performed in the indoor heat exchanger (31).
  • the indoor fan (33) is stopped.
  • the indoor unit (30) and the radiation panel (40) perform a cooling operation.
  • the indoor heat exchanger (31) and the radiant heat exchanger (52) perform the cooling operation.
  • the indoor expansion valve (32) corresponding to the indoor heat exchanger (31) is opened.
  • the degree of opening of the indoor expansion valve (32) is controlled based on the degree of superheat SH1 of the refrigerant flowing out of the indoor heat exchanger (31).
  • the radiation expansion valve (51) corresponding to the radiation heat exchanger (52) is opened.
  • the opening degree of the radiation expansion valve (51) is controlled based on the degree of superheat SH2 of the refrigerant flowing out of the radiation heat exchanger (52).
  • the indoor fan (33) is operated.
  • the air conditioning apparatus (10) includes a control unit that switches the first operation, the second operation, and the third operation based on an index indicating a cooling load in the room.
  • the control unit includes the indoor controller (C1) and the radiation controller (C2) described above.
  • the index indicating the cooling load is the difference (Tr ⁇ Ts) between the temperature Tr of the indoor air described above and the set temperature Ts.
  • the indoor temperature sensor (71) constitutes a load detection unit that detects a cooling load. The index indicating the cooling load is not limited to this.
  • the air conditioner (10) performs the third operation at the start of the cooling operation.
  • the indoor unit (30) and the radiation panel (40) perform a cooling operation.
  • the cooling load in the room can be rapidly reduced.
  • the third operation is switched to the second operation when a condition is established in which the cooling load in the room is lower than a predetermined value.
  • the radiation panel (40) performs the cooling operation. This second operation can suppress the room temperature from becoming excessively low. In addition, cold air blown from the indoor unit (30) can be reliably avoided from hitting the occupants.
  • the third operation may not necessarily be performed only at the start of the cooling operation. After the start of the cooling operation, the third operation is performed when the condition for the indoor cooling load to become higher than a predetermined value is satisfied. By the third operation, the cooling load in the room can be rapidly reduced. Also in this case, the third operation is switched to the second operation when a condition is established in which the cooling load in the room is lower than a predetermined value during the third operation. In the second operation, only the radiation panel (40) performs the cooling operation. This second operation can suppress the room temperature from becoming excessively low. In addition, cold air blown from the indoor unit (30) can be reliably avoided from hitting the occupants.
  • the heating operation of the air conditioner (10) includes a fourth operation, a fifth operation, and a sixth operation.
  • the indoor unit (30) of the indoor unit (30) and the radiation panel (40) performs a heating operation.
  • the indoor heat exchanger (31) and the radiant heat exchanger (52) only the indoor heat exchanger (31) performs the heating operation.
  • the indoor expansion valve (32) corresponding to the indoor heat exchanger (31) is opened.
  • the degree of opening of the indoor expansion valve (32) is controlled based on the degree of supercooling SC1 of the refrigerant flowing out of the indoor heat exchanger (31).
  • the opening degree of the radiation expansion valve (51) corresponding to the radiation panel (40) is controlled to be fully closed or slightly open.
  • the "small opening degree” referred to here is an opening degree at which the heating operation is not substantially performed by the radiation heat exchanger (52).
  • the indoor fan (33) is operated.
  • the radiation panel (40) of the indoor unit (30) and the radiation panel (40) performs a heating operation.
  • the radiant heat exchanger (52) performs the heating operation.
  • the radiation expansion valve (51) corresponding to the radiation heat exchanger (52) is opened.
  • the opening degree of the radiation expansion valve (51) is controlled based on the degree of subcooling SC2 of the refrigerant flowing out of the radiation heat exchanger (52).
  • the opening degree of the indoor expansion valve (32) corresponding to the indoor unit (30) is controlled to be fully closed or slightly open.
  • the "small opening degree” referred to here is an opening degree at which the heating operation is not substantially performed by the indoor heat exchanger (31).
  • the indoor fan (33) is stopped.
  • the radiation heat exchanger (52) is a condenser or a radiator
  • the outdoor heat exchanger (22) is an evaporator
  • the refrigeration cycle for stopping the indoor heat exchanger (31) Is done.
  • the indoor unit (30) and the radiation panel (40) perform a heating operation.
  • the indoor heat exchanger (31) and the radiant heat exchanger (52) perform the heating operation.
  • the indoor expansion valve (32) corresponding to the indoor heat exchanger (31) is opened.
  • the degree of opening of the indoor expansion valve (32) is controlled based on the degree of supercooling SC1 of the refrigerant flowing out of the indoor heat exchanger (31).
  • the radiation expansion valve (51) corresponding to the radiation heat exchanger (52) is opened.
  • the opening degree of the radiation expansion valve (51) is controlled based on the degree of subcooling SC2 of the refrigerant flowing out of the radiation heat exchanger (52).
  • the indoor fan (33) is operated.
  • a refrigeration cycle is performed in which the indoor heat exchanger (31) and the radiant heat exchanger (52) are a condenser or a radiator and the outdoor heat exchanger (22) is an evaporator. .
  • the air conditioner (10) includes a control unit that switches the fourth operation, the fifth operation, and the sixth operation based on the index indicating the heating load in the room.
  • the control unit includes the indoor controller (C1) and the radiation controller (C2) described above.
  • the index indicating the heating load is the difference (Ts ⁇ Tr) between the set temperature Ts and the indoor temperature Tr.
  • the indoor temperature sensor (71) constitutes a load detection unit that detects a heating load. The index indicating the heating load is not limited to this.
  • the air conditioner (10) performs the sixth operation at the start of the heating operation.
  • the indoor unit (30) and the radiation panel (40) perform a heating operation.
  • the heating load in the room can be rapidly reduced.
  • the sixth operation is switched to the fifth operation when a condition for the indoor heating load to fall below a predetermined value is satisfied.
  • the fifth operation only the radiation panel (40) performs the heating operation. This fifth operation can suppress the room temperature from becoming excessively high. In addition, it is possible to reliably prevent the warm air blown out from the indoor unit (30) from hitting the occupants.
  • the sixth operation may not necessarily be performed only at the start of the heating operation. After the start of the heating operation, the sixth operation is performed when a condition is established in which the indoor heating load is higher than a predetermined value. By the sixth operation, the heating load in the room can be rapidly reduced. Also in this case, the sixth operation is switched to the fifth operation when the condition for the indoor heating load to fall below a predetermined value is satisfied during the sixth operation. In the fifth operation, only the radiation panel (40) performs the heating operation. This fifth operation can suppress the room temperature from becoming excessively high. In addition, it is possible to reliably prevent the warm air blown out from the indoor unit (30) from hitting the occupants.
  • the present disclosure is useful for an air conditioner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Un circuit de fluide frigorigène (11) comprend un circuit extérieur (12) auquel sont connectés un compresseur (21) et un échangeur de chaleur extérieur (22), un circuit intérieur (13) auquel sont connectées un échangeur de chaleur intérieur (31) et une première soupape de réglage (32), et un circuit de rayonnement (15) auquel sont connectés un échangeur de chaleur de rayonnement (52) et une seconde soupape de réglage (51). Dans le circuit de fluide frigorigène (11), le circuit intérieur (13) et le circuit de rayonnement (15) sont connectés en parallèle.
PCT/JP2019/001336 2018-01-29 2019-01-17 Dispositif de climatisation Ceased WO2019146502A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-012469 2018-01-29
JP2018012469 2018-01-29

Publications (1)

Publication Number Publication Date
WO2019146502A1 true WO2019146502A1 (fr) 2019-08-01

Family

ID=67395467

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/001336 Ceased WO2019146502A1 (fr) 2018-01-29 2019-01-17 Dispositif de climatisation

Country Status (2)

Country Link
JP (1) JP2019132575A (fr)
WO (1) WO2019146502A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112539453A (zh) * 2020-12-18 2021-03-23 珠海格力电器股份有限公司 一种多联机空调及其控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110486904B (zh) * 2019-08-19 2021-03-12 珠海格力电器股份有限公司 风阀开度动态调节方法、装置及空调设备
CN111609479B (zh) * 2020-04-23 2021-05-28 海信（山东）空调有限公司 一种空调器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05312428A (ja) * 1992-05-11 1993-11-22 Daikin Ind Ltd 空気調和装置の運転制御装置
JPH07280376A (ja) * 1995-03-13 1995-10-27 Daikin Ind Ltd 空気調和装置
JPH08278051A (ja) * 1995-04-05 1996-10-22 Sanyo Electric Co Ltd 冷凍装置
JP2003322388A (ja) * 2002-05-02 2003-11-14 Toshiba Kyaria Kk 空気調和機
JP2017067320A (ja) * 2015-09-28 2017-04-06 パナソニックＩｐマネジメント株式会社 空気調和装置
WO2017068909A1 (fr) * 2015-10-21 2017-04-27 三菱電機株式会社 Conditionneur d'air

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0448138A (ja) * 1990-06-14 1992-02-18 Sanyo Electric Co Ltd 空気調和装置
JP2012141113A (ja) * 2011-01-06 2012-07-26 Daikin Industries Ltd 空気調和温水機器システム
JP5898568B2 (ja) * 2012-05-23 2016-04-06 シャープ株式会社 輻射式空気調和機
JP6526398B2 (ja) * 2014-09-10 2019-06-05 リンナイ株式会社 ヒートポンプシステム

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05312428A (ja) * 1992-05-11 1993-11-22 Daikin Ind Ltd 空気調和装置の運転制御装置
JPH07280376A (ja) * 1995-03-13 1995-10-27 Daikin Ind Ltd 空気調和装置
JPH08278051A (ja) * 1995-04-05 1996-10-22 Sanyo Electric Co Ltd 冷凍装置
JP2003322388A (ja) * 2002-05-02 2003-11-14 Toshiba Kyaria Kk 空気調和機
JP2017067320A (ja) * 2015-09-28 2017-04-06 パナソニックＩｐマネジメント株式会社 空気調和装置
WO2017068909A1 (fr) * 2015-10-21 2017-04-27 三菱電機株式会社 Conditionneur d'air

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112539453A (zh) * 2020-12-18 2021-03-23 珠海格力电器股份有限公司 一种多联机空调及其控制方法
CN112539453B (zh) * 2020-12-18 2021-09-07 珠海格力电器股份有限公司 一种多联机空调及其控制方法

Also Published As

Publication number Publication date
JP2019132575A (ja) 2019-08-08

Similar Documents

Publication Publication Date Title
US10760832B2 (en) Air-conditioning apparatus
US11519623B2 (en) Air-conditioning apparatus
JP5992088B2 (ja) 空気調和装置
JP5772904B2 (ja) 熱回収型冷凍装置
WO2011099074A1 (fr) Dispositif à cycle frigorifique
SE1451397A1 (sv) Radiation-type air conditioner
JP6038382B2 (ja) 空気調和装置
WO2019146502A1 (fr) Dispositif de climatisation
WO2014132433A1 (fr) Dispositif de climatisation
JP6246394B2 (ja) 空気調和装置
JP5949831B2 (ja) 冷凍装置
JP6017048B2 (ja) 空気調和装置
US20210180802A1 (en) Air-conditioning system
EP2339267B1 (fr) Appareil à cycle de réfrigération, climatiseur d'air alimenté en eau chaude de type pompe à chaleur et unité d'extérieur correspondante
JP2016020784A (ja) 空気調和装置
WO2020189586A1 (fr) Dispositif à cycle de réfrigération
JP6612652B2 (ja) 空気調和機
JP6017049B2 (ja) 空気調和装置
JP2021055876A (ja) 熱源ユニット及び冷凍装置
JP2002174465A (ja) 冷凍装置
JP6627900B2 (ja) 空気調和装置
JP6627899B2 (ja) 空気調和装置
JP3279235B2 (ja) 冷凍装置
JP2003172556A (ja) 冷凍システム
JPH04198674A (ja) 空気調和装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19743109

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19743109

Country of ref document: EP

Kind code of ref document: A1