WO2013061399A1 - ヒートポンプシステム、制御装置、温調方法及びプログラム - Google Patents
ヒートポンプシステム、制御装置、温調方法及びプログラム Download PDFInfo
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- WO2013061399A1 WO2013061399A1 PCT/JP2011/074466 JP2011074466W WO2013061399A1 WO 2013061399 A1 WO2013061399 A1 WO 2013061399A1 JP 2011074466 W JP2011074466 W JP 2011074466W WO 2013061399 A1 WO2013061399 A1 WO 2013061399A1
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- 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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
- 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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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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
- 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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F3/06—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 arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—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 arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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- 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
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- 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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1917—Control of temperature characterised by the use of electric means using digital means
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0291—Control issues related to the pressure of the indoor unit
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0292—Control issues related to reversing valves
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0314—Temperature sensors near the indoor heat exchanger
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- 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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
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- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21161—Temperatures of a condenser of the fluid heated by the condenser
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present invention relates to a heat pump system, a control device, a temperature control method, and a program.
- a plurality of indoor units arranged for each floor or for each section of the floor are connected to outdoor units installed on the rooftop or the like through refrigerant piping. Is done.
- a heat pump that performs heat exchange between the indoor air and the outside air is configured.
- the capacity (capacity) of the outdoor unit is determined based on the total capacity (total capacity) of the indoor units connected to the outdoor unit.
- the refrigerant is preferentially supplied to the indoor unit that requires the most refrigerant. For this reason, the quantity of the refrigerant
- the present invention has been made under the circumstances described above, and an object of the present invention is to efficiently control the temperature adjustment target according to the priority specified by the user.
- a heat pump system includes: A plurality of indoor units that exchange heat between the temperature control target and the refrigerant; An outdoor unit that exchanges heat between the outside air and the refrigerant; A first circulation system for circulating a refrigerant between the plurality of indoor units and the outdoor unit; Adjusting means for adjusting the amount of refrigerant that is provided for each indoor unit and flows into the indoor unit from the first circulation system; Input means for inputting a priority set in the indoor unit; The sum of the refrigerant flow rates required for each of the plurality of indoor units, obtained based on the temperature control target temperature of each of the plurality of indoor units and the current temperature of the temperature control target, is the outdoor unit.
- Control means for controlling the adjusting means to distribute the refrigerant Is provided.
- the refrigerant is distributed to the indoor unit according to the priority.
- the temperature adjustment target can be efficiently controlled without impairing the comfort of the user.
- FIG. 1 is a block diagram of a heat pump system 10 installed in an office building 100 as an example.
- the office building 100 has three work spaces A1, A2, A3 and a hot water supply room B1.
- the heat pump system 10 includes indoor units 30A to 30C arranged in the work spaces A1 to A3 of the office building 100, an indoor unit 40 arranged in the hot water supply room B1, and an outdoor unit arranged on the roof of the office building 100. 20.
- Each of the indoor units 30A to 30C, 40 is connected to the outdoor unit 20 by a circulation system 50 for circulating the refrigerant.
- FIG. 2 is a diagram showing a piping system of the heat pump system 10.
- the outdoor unit 20 includes a heat exchanger 23, a compressor 21, and a four-way valve 22. Each of the above parts is connected via a refrigerant pipe 26.
- the heat exchanger 23 is, for example, a fin-and-tube heat exchanger of a cross fin type having a heat transfer tube and a heat radiating fin and an electric fan for cooling the heat radiating fin.
- the heat exchanger 23 functions as a condenser when the heat pump system 10 performs a cooling operation, and functions as an evaporator when the heat pump system 10 performs a heating operation.
- the compressor 21 is a positive displacement compressor including an inverter motor, for example.
- the compressor 21 compresses the refrigerant and discharges it to the four-way valve 22.
- the four-way valve 22 is a valve for switching the direction of the refrigerant flowing through the heat exchanger 23.
- the four-way valve 22 circulates in the direction indicated by the arrow Aa when the heat pump system 10 is performing the cooling operation, and when the heat pump system 10 performs the heating operation, the direction of the refrigerant is indicated by the arrow Ab. Is switched to circulate.
- Freon gas R410A is used as the refrigerant.
- the outdoor unit 20 configured as described above is installed on the roof of an office building 100 and is provided between a refrigerant supplied through a circulation system 50 as a first circulation system and the outside air. Perform heat exchange at.
- the indoor unit 30A is a device for cooling or heating indoor air as a temperature control target. As shown in FIG. 2, the indoor unit 30 ⁇ / b> A includes a heat exchanger 31 and an expansion valve 32. The heat exchanger 31 and the expansion valve 32 are connected in series by a refrigerant pipe 35.
- the heat exchanger 31 has the same configuration as the heat exchanger 23 described above.
- the heat exchanger 23 performs heat exchange between the refrigerant flowing through the heat exchanger 23 and indoor air.
- the expansion valve 32 is an electric expansion valve that functions as an adjusting means for adjusting the flow rate of the refrigerant flowing through the heat exchanger 31.
- the expansion valve 42 includes, for example, a valve and a stepping motor that adjusts the opening degree of the valve.
- the indoor unit 30A configured as described above is installed on the ceiling of the work space A1 of the office building 100, for example, as shown in FIG. And indoor unit 30A performs heat exchange between the refrigerant
- the indoor units 30B and 30C have the same configuration as the indoor unit 30A described above. These indoor units 30B and 30C are installed on the ceilings of the work spaces A2 and A3 of the office building 100, respectively. Each of the indoor units 30B and 30C performs heat exchange between the refrigerant supplied via the circulation system 50 and the internal air of the work spaces A2 and A3.
- the indoor unit 40 is a device for cooling or heating tap water as a temperature control target. As shown in FIG. 2, the indoor unit 40 includes a heat exchanger 41 and an expansion valve 42. The heat exchanger 41 and the expansion valve 42 are connected in series by a refrigerant pipe 35.
- the heat exchanger 41 is a plate type heat exchanger.
- the heat exchanger 41 exchanges heat between the tap water flowing through the heat exchanger 41 and the refrigerant by the water supply pump 60.
- the expansion valve 42 is an electronic expansion valve for adjusting the flow rate of the refrigerant flowing through the heat exchanger 41.
- the expansion valve 42 includes, for example, a valve and a stepping motor that adjusts the opening degree of the valve.
- the indoor unit 40 configured as described above is installed in the hot water supply room B1 of the office building 100 as shown in FIG.
- the indoor unit 40 exchanges heat between the refrigerant supplied via the circulation system 50 and the tap water flowing through the water pipe 61. Thereby, for example, tap water flowing from the water pipe 61 to the water heater is preheated.
- the refrigerant pipes 50 a and 50 b constituting the circulation system 50 and the refrigerant pipe 26 constituting the outdoor unit 20 are connected by joints 24 and 25.
- the refrigerant pipes 50a and 50b and the refrigerant pipe 35 constituting the indoor units 30A to 30B are connected by joints 33 and 34, respectively.
- the refrigerant pipes 50 a and 50 b constituting the circulation system 50 and the refrigerant pipe 47 constituting the indoor unit 40 are connected by joints 43 and 44.
- FIG. 3 is a block diagram showing a control system of the heat pump system 10. As shown in FIG. 3, the outdoor unit 20 of the heat pump system 10 includes an outdoor control unit 120.
- the outdoor control unit 120 communicates with the indoor units 30A to 30C and 40, and acquires information (request amount information) indicating a priority P (n) and a request amount Q, which will be described later, from the indoor units 30A to 30C and 40. Then, the outdoor control unit 120 drives the compressor 21 according to the acquired request amount information.
- the outdoor control unit 120 includes a control device 201 and a drive device 202.
- FIG. 4 is a block diagram of the control device 201.
- the control device 201 is a microcomputer having a CPU (Central Processing Unit) 201a, a main storage unit 201b, an auxiliary storage unit 201c, an interface 201d, and a bus 201e that interconnects the above units. .
- CPU Central Processing Unit
- main storage unit 201b main storage unit
- auxiliary storage unit 201c main storage unit
- interface 201d main storage unit
- bus 201e that interconnects the above units.
- the main storage unit 201b has a volatile memory such as DRAM (Dynamic Random Access Memory) or SRAM (Static Random Access Memory).
- the main storage unit 201b is used as a work area for the CPU 201a.
- the auxiliary storage unit 201c has a nonvolatile memory such as a magnetic disk or a flash memory.
- the auxiliary storage unit 201c stores information on programs executed by the CPU 201a and various parameters.
- the interface 201d includes a serial interface, for example.
- the CPU 201a communicates with each of the indoor units 30A to 30C, 40 via the interface 201d.
- the driving device 202 has an inverter circuit for driving the inverter motor included in the compressor 21 and a driving circuit for driving the four-way valve 22.
- the drive device 202 applies a drive voltage having a frequency f that is frequency-modulated based on an instruction from the control device 201 to an inverter motor that constitutes the compressor 21.
- the inverter motor which comprises the compressor 21 rotates with the rotation speed according to the frequency f.
- the driving device 202 drives the four-way valve 22 based on an instruction from the control device 201 to switch the direction of the refrigerant flowing through the heat exchanger 23 to the direction indicated by the arrow Aa or the direction indicated by the arrow Ab. .
- the indoor unit 30A has an indoor control unit 130A.
- the indoor control unit 130A is a device that adjusts the flow rate of the refrigerant flowing through the heat exchanger 31 by controlling the expansion valve 32 of the indoor unit 30A.
- This indoor control unit 130A includes a control device 301, an input unit 302, a temperature sensor 303, and a valve drive circuit 304.
- the input unit 302 is a remote control device arranged on the wall surface of the workspace A1, for example.
- the input unit 302 has a GUI (Graphical User Interface) composed of a liquid crystal display and a touch panel, or an interface composed of input keys and the like.
- the user can input various information to the control device 301 via the input unit 302.
- the information input to the control device 301 is, for example, set temperature for the work space A1, information indicating the air volume from the indoor unit 30A, information indicating the priority P (n) of the indoor unit 30A described later, and the like.
- Priority P (n) can be entered numerically. For example, when the priority is three levels, the indoor unit assigned “3” as the priority has the highest priority, and the indoor unit assigned “2” as the priority has the next highest priority. An indoor unit that is high and assigned “1” as a priority indicates that the priority is the lowest. In the present embodiment, as an example, the priority of each indoor unit is set as shown in the following table.
- the temperature sensor 303 is a sensor for detecting the temperature of the air flowing into the heat exchanger 31 by the electric fan.
- a thermistor whose resistance value changes according to temperature can be used.
- the control device 301 can measure the temperature of the air flowing into the electric fan, that is, the room temperature of the work space A1, by measuring the resistance value of the temperature sensor 303.
- the valve drive circuit 304 drives the stepping motor of the expansion valve 32 to adjust the opening degree of the expansion valve 32 and adjust the flow rate of the refrigerant flowing through the heat exchanger 31. .
- the control device 301 has a CPU, a main storage unit, an auxiliary storage unit, and an interface, like the control device 201 of the outdoor control unit 120.
- the control device 301 obtains the refrigerant flow rate required in the indoor unit 30A from the information input by the user via the input unit 302 and the room temperature of the work space A1 measured by the temperature sensor 303. This flow rate is a flow rate of the refrigerant necessary for the indoor unit 30A to exhibit its intended performance.
- the required flow rate of the refrigerant is obtained by, for example, multiplying the difference (T i ⁇ T r ) between the set temperature T i set by the user and the measured room temperature T r by a specific coefficient a1 determined for each indoor unit. It can ask for.
- the control device 201 obtains the refrigerant flow rate a1 (T i -T r ) necessary for the indoor unit 30A, it outputs information indicating the obtained flow rate to the outdoor unit 20.
- control device 301 obtains the opening degree of the expansion valve 32 based on information from the control device 201 of the outdoor unit 20.
- the opening degree of the expansion valve 32 is obtained by multiplying the supply amount V by a specific coefficient a2 determined for each indoor unit. Can do.
- the control device 201 adjusts the opening degree of the expansion valve 32 to a2 ⁇ V via the valve drive circuit 304.
- the indoor units 30B and 30C have indoor control units 130B and 130C.
- Each of the indoor control units 130B and 130C is a device that adjusts the flow rate of the refrigerant flowing through the heat exchanger 31 by controlling the expansion valve 32 of the indoor units 30B and 30C.
- These indoor control units 130B and 130C include a control device 301, an input unit 302, a temperature sensor 303, and a valve drive circuit 304, similarly to the indoor control unit 130A described above. And it functions similarly to the indoor control unit 130A.
- the indoor unit 40 has an indoor control unit 140.
- the indoor control unit 140 is a device that adjusts the flow rate of the refrigerant flowing through the heat exchanger 41 by controlling the expansion valve 42.
- the indoor control unit 140 includes a control device 401, an input unit 402, and a temperature sensor 403.
- the input unit 402 has an interface made up of, for example, a dial or a push button disposed in the housing of the indoor unit 40.
- the user can input, for example, information indicating a hot water supply temperature and a priority P (n) of an indoor unit 30 ⁇ / b> A (described later) to the control device 401 via the input unit 402.
- the temperature sensor 403 is a sensor for detecting the temperature of tap water after heat exchange with the refrigerant.
- This temperature sensor 303 is provided in the water pipe 61 connected to the secondary side (discharge side) of the heat exchanger 41.
- a thermistor whose resistance value changes according to temperature can be used.
- the control device 401 can measure the temperature (water temperature) of tap water that has passed through the heat exchanger 41 by measuring the resistance value of the temperature sensor 403.
- valve drive circuit 404 When the valve drive circuit 404 receives an instruction from the control device 401, it drives the stepping motor of the expansion valve to adjust the opening of the expansion valve 42 and adjust the flow rate of the refrigerant flowing through the heat exchanger 31.
- the control device 401 includes a CPU, a main storage unit, an auxiliary storage unit, and an interface, like the control units of the outdoor control unit 120 and the indoor control units 130A to 130C.
- the control device 401 obtains the refrigerant flow rate required in the indoor unit 40 from the information input by the user via the input unit 402 and the water temperature measured by the temperature sensor 403. Then, information indicating the obtained flow rate is output to the outdoor unit 20.
- the control device 401 obtains the opening degree of the expansion valve 42 based on an instruction from the control device 201 of the outdoor unit 20. Then, the opening degree of the expansion valve 42 is adjusted via the valve drive circuit 404.
- FIG. 5 is a flowchart showing processing executed by the control device 201 after the outdoor unit 20 is turned on.
- the user can set the set temperature Ti (n) of each indoor unit 30A to 30C, 40 by operating the input units 302, 402 of the indoor units 30A to 30C, 40. .
- an initial value is set as the set temperature Ti (n).
- the user can set the priority P (n) for each of the indoor units 30A to 30C and 40 by operating the input units 302 and 402 of the indoor units 30A to 30C and 40.
- the set temperature Ti (n) and the priority P (n) input by the user are captured and stored by the control devices 301 and 401.
- the control device 201 receives priority information PD (n) indicating the priority P (n) from the control devices 301 and 401 of the indoor units 30A to 30C and 40. ) To get.
- n is determined by the number of indoor units 30A to 30C and 40, and is an integer from 1 to 4 here.
- the priority information PD (1) to PD (4) indicates the priority information of the indoor units 30A to 30C and 40, respectively.
- the priority P (n) indicates the priority order of the indoor units, and is indicated by three numbers 1 to 3 in this embodiment.
- the priority P (n) the higher the priority, the higher the priority.
- an indoor unit with a priority P (n) of “3” is an indoor unit with a priority P (n) of “2” or “1”. This means that the refrigerant is supplied in preference to the unit.
- the user can input the value of the priority P (n) to the control devices 301 and 401 via the input units 302 and 402 of the indoor units 30A to 30C and 40, for example.
- the control device 201 acquires request amount information QD (n) indicating the request amount Q (n) from the control devices 301 and 401 of the indoor units 30A to 30C and 40.
- the requested amount information QD (1) to QD (4) indicates requested amount information of the indoor units 30A to 30C and 40, respectively.
- the required amount Q (n) is the refrigerant flow rate required in the indoor unit, which is obtained by the control devices 301 and 401 of the indoor units 30A to 30C and 40 as described above. For example, this is equivalent to the amount of refrigerant (L / min) passing through each indoor unit in one minute.
- the total required amount QT (k) is the sum of the required amounts Q K (n) from the indoor units whose priority P (n) is k as shown in the following equation (1).
- the value k of the priority P (1) of the indoor unit 30A is “3”
- the value k of the priority P (2) of the indoor unit 30B is “2”
- the value of the priority P (3) of the indoor unit 30C is “1”
- the control device 201 causes the total required amount QT (3) for the priority value “3”.
- Q 3 (1) is obtained as follows.
- Q 2 (2) + Q 2 (3) is obtained as the total required amount QT (2) for the priority value “2”.
- Q 1 (4) is obtained as the total required amount QT (1) for the priority value “1”.
- the value k of the priority P (1) of the indoor unit 30A is “3”
- the value k of the priority P (2) of the indoor unit 30B is “2”
- the priority P (3 of the indoor unit 30C is The description will be continued on the assumption that the value k of “)” is “2” and the value k of the priority P (4) of the indoor unit 40 is “1”.
- the control device 201 determines the total required amount QT (k1) for the highest priority value k1, and the maximum amount (maximum flow rate) QM of refrigerant discharged from the compressor 21 per minute. Compare Specifically, the total required amount QT (3) for the highest priority value “3” is compared with the maximum amount QM. When the control device 201 determines that the total required amount QT (3) is larger than the maximum amount QM (step S204: Yes), the control device 201 proceeds to the next step S205.
- step S205 the control device 201 apportions the maximum amount QM according to the ratio of the requested amount Q k1 (n) by the indoor unit whose priority value is k1.
- the distribution amount QS k1 (n) is calculated for each indoor unit whose priority P (n) is k1. Further, the control device 201 sets the distribution amount QS k (n) for the remaining indoor units to zero.
- step S205 the priority value k1 is “3”. Therefore, by substituting the required amount Q 3 (1) of the indoor unit 30A and the total required amount QT (3) when the priority value k is “3” into the above equation (2), the indoor unit The distribution amount QS 3 (1) of the refrigerant distributed to 30A can be obtained. In step S205, only one indoor unit has a priority value k of “3”. For this reason, the maximum amount QM of refrigerant discharged from the compressor 21 is equal to the distribution amount QS 3 (1) for the indoor unit 30A.
- step S204 when the total required amount QT (k1) is equal to or less than the maximum amount QM in step S204 (step S204: No), the control device 201 proceeds to next step S206.
- step S206 the control device 201 determines an amount equal to the requested amount Q k1 (n) from the indoor unit whose priority value is k1 as the distribution amount QS k1 (n) to the indoor unit.
- an amount equal to the requested amount Q 3 (1) from the indoor unit 30A having the priority value “3” is the distribution amount QS 3 (1) to the indoor unit 30A.
- the surplus amount QM (k1) obtained by subtracting QT (k1) is compared.
- the control device 201 determines that the total required amount QT (k2) is larger than the surplus amount QM (k1) (step S207: Yes)
- the control device 201 proceeds to the next step S208.
- step S208 as shown in the following equation (3), the control device 201 sets the surplus amount QM (k1) according to the ratio of the requested amount Qk2 (n) by the indoor unit having the priority value k2. By apportioning, the distribution amount QS k2 (n) is calculated for each indoor unit. Further, the control device 201 sets the distribution amount QS k (n) for the remaining indoor units to zero.
- step S208 the priority value k2 is “2”. Therefore, the surplus amount QM (k1), the required amount Q 2 (2) of the indoor unit 30B, and the total required amount QT (2) when the priority value k is “2” are expressed by the above equation (3).
- the refrigerant distribution amount QS 2 (2) distributed to the indoor unit 30B can be obtained.
- the surplus amount QM (2), the required amount Q 2 (3) of the indoor unit 30C, and the total required amount QT (2) when the priority value k is “2” are converted into the above equation (3).
- the distribution amount QS 2 (3) of the refrigerant distributed to the indoor unit 30C can be obtained.
- the maximum amount QM is “10”
- the required amount Q 3 (1) of the indoor unit 30A is “6”
- the required amount Q 2 (2) of the indoor unit 30B is “3”
- the distribution amount QS 3 (1) of the indoor unit 30A, the distribution amount QS 2 (2) of the indoor unit 30B, and the distribution amount QS 2 (3) of the indoor unit 30C are obtained as shown in the following table.
- step S207 No
- the control device 201 proceeds to the next step S209.
- step S209 the control device 201 determines an amount equal to the requested amount Q k2 (n) from the indoor unit whose priority value is k2 as the distribution amount QS k2 (n) to the indoor unit.
- the amount equal to the requested amount Q 2 (2) from the indoor unit 30B with the priority value “2” is the distribution amount QS 2 (2) to the indoor unit 30B.
- An amount equal to the required amount Q 2 (3) from the indoor unit 30C is the distribution amount QS 2 (3) to the indoor unit 30C.
- step S211 the control device 201 changes the surplus amount QM (k2) according to the ratio of the requested amount Qk3 (n) by the indoor unit with the priority value k3 as shown in the following equation (4).
- the distribution amount QS k3 (n) is calculated for each indoor unit. Further, the control device 201 sets the distribution amount QS k (n) for the remaining indoor units to zero.
- step S211 the priority value k3 is “1”. Therefore, the surplus amount QM (k2), the required amount Q2 K3 (3) of the indoor unit 40, and the total required amount QT (1) when the priority value k is “1” are expressed by the above equation (4). By substituting into, the distribution amount QS 3 (4) of the refrigerant distributed to the indoor unit 40 can be obtained.
- the maximum amount QM is “10”
- the required amount Q 3 (1) of the indoor unit 30A is “3”
- the required amount Q 2 (2) of the indoor unit 30B is “2”
- the distribution of the indoor units 30A QS 3 (1), volume of distribution of the indoor unit 30B QS 2 (2), volume of distribution of the indoor units 30C QS 2 (3), and volume of distribution QS 1 (4 of the indoor unit 40 ) Is obtained as shown in the following table.
- step S210 when the total required amount QT (k3) is equal to or less than the surplus amount QM (k2) in step S210 (step S210: No), the control device 201 proceeds to the next step S212.
- step S212 the control device 201 determines an amount equal to the requested amount Q k3 (n) from the indoor unit whose priority value is k3 as the distribution amount QS k3 (n) to the indoor unit.
- an amount equal to the requested amount Q 1 (4) from the indoor unit 40 with the priority value “1” is the distribution amount QS 1 (4) to the indoor unit 30B.
- step S213 When the processes in steps S205, S208, S211, and S212 are completed, the control device 201 proceeds to step S213.
- step S213 the control device 201 sets the frequency f of the drive voltage for driving the compressor 21.
- the control device 201 sets the frequency f of the drive voltage to a frequency equal to the rated frequency of the compressor 21 when the determinations in steps S204, S207, and S210 are affirmed. Thereby, the compressor 21 is operated at the rated maximum output.
- the control device 201 sets the frequency f of the drive voltage so that the refrigerant having a flow rate equal to the sum of the requested amount Q (n) from the indoor units 30A to 30C, 40 is discharged from the compressor 21. Set.
- the control device 201 sets the frequency f of the drive voltage
- the control device 201 outputs information indicating the frequency f to the drive device 202.
- the driving device 202 applies a driving voltage having a frequency f to the compressor 21.
- the compressor 21 the inverter motor constituting the compressor 21 rotates at a rotational speed proportional to the frequency f, and an amount of refrigerant corresponding to the request from each indoor unit is discharged from the compressor 21.
- the control device 201 sets the opening degrees R1 to R4 of the expansion valves 32 and 42 constituting the indoor units 30A to 30C and 40, respectively.
- the openings R1 to R4 of the expansion valves 32 and 42 are set by the distribution amount QS k (n) to each indoor unit obtained by the processing of steps S201 to S213.
- step S204 determines whether the sum of the distribution amounts QS k1 (n) for the indoor units having the priority value k1 exceeds the maximum amount QM of the compressor 21.
- the control device 201 sets the opening degree of the expansion valve included in the indoor unit having the priority value k1 to an opening degree corresponding to the required amount required for the indoor unit.
- the control apparatus 201 sets the opening degree of the expansion valve of the remaining indoor units to zero.
- control device 201 sets the opening degree R1 of the expansion valve 32 of the indoor unit 30A according to the required amount Q (1), and the expansion valves 32 of the remaining indoor units 30B, 30C, and 40.
- the opening degrees R2 to R4 of 42 are set to zero.
- the control device 201 When the opening degree of each of the expansion valves 32 and 42 is set, the control device 201 notifies this setting result to the control devices 301 and 401 of the indoor units 30A to 30C and 40. Thereby, the opening degree of the expansion valve 32 of the indoor unit 30A becomes a desired opening degree, and the expansion valves 32, 42 of the indoor units 30B, 30C, 40 are completely closed. Thereby, the refrigerant
- step S207 If the determination in step S207 is affirmative, the total of the distribution amount QS k1 (n) of the indoor unit with the priority value k1 and the distribution amount QS k2 (n) for the indoor unit with the priority value k2. However, the maximum amount QM of the compressor 21 is exceeded. In this case, the control device 201 sets the opening degree of the expansion valve included in the indoor units having the priority values k1 and k2 to an opening degree corresponding to the required amount required for the indoor unit. And the control apparatus 201 sets the opening degree of the expansion valve of the remaining indoor units to zero.
- control device 201 sets the opening degrees R1 to R3 of the expansion valves 32 of the indoor units 30A, 30B, and 30C according to the required amounts Q (1), Q (2), and Q (3). At the same time, the opening R4 of the expansion valve 42 of the remaining indoor units 40 is set to zero.
- the control device 201 When the opening degree of each of the expansion valves 32 and 42 is set, the control device 201 notifies this setting result to the control devices 301 and 401 of the indoor units 30A to 30C and 40. Thereby, the refrigerant corresponding to the required amount is supplied to the indoor units 30A to 30C.
- step S210 If the determination in step S210 is affirmative, the distribution amount QS k1 (n) of the indoor unit with the priority value k1 and the distribution amount QS k2 (n) for the indoor unit with the priority value k2; The sum of the distribution amount QS k3 (n) for the indoor units with the priority value k3 exceeds the maximum amount QM of the compressor 21.
- the control device 201 sets the opening degree of the expansion valve included in the indoor units having the priority values k1, k2, and k3 to an opening degree corresponding to the required amount required for the indoor unit. . And the control apparatus 201 sets the opening degree of the expansion valve of the remaining indoor units to zero.
- the control device 201 sets the opening amounts R1 to R4 of the expansion valves 32 and 42 of the indoor units 30A, 30B, 30C, and 40 to the requested amounts Q (1), Q (2), and Q (3). , Q (4).
- the opening degree of the expansion valve of the remaining indoor unit is set to zero. To do.
- the control device 201 When the opening degree of each of the expansion valves 32 and 42 is set, the control device 201 notifies this setting result to the control devices 301 and 401 of the indoor units 30A to 30C and 40. As a result, the refrigerant corresponding to the required amount is supplied to the indoor units 30A to 30C, 40.
- step S210 If the determination in step S210 is negative, the distribution amount QS k1 (n) of the indoor unit with the priority value k1 and the distribution amount QS k2 (n for the indoor unit with the priority value k2 ) And the distribution amount QS k3 (n) for the indoor unit with the priority value k3 is equal to or less than the maximum amount QM of the compressor 21.
- the control device 201 sets the opening degree of the expansion valve included in the indoor units having the priority values k1, k2, and k3 to an opening degree corresponding to the required amount required for the indoor unit. .
- control device 201 sets the opening amounts R1 to R4 of the expansion valves 32 and 42 of the indoor units 30A, 30B, 30C, and 40 to the requested amounts Q (1), Q (2), and Q (3). , Q (4).
- the control device 201 When the opening degree of each of the expansion valves 32 and 42 is set, the control device 201 notifies this setting result to the control devices 301 and 401 of the indoor units 30A to 30C and 40. As a result, the refrigerant corresponding to the required amount is supplied to the indoor units 30A to 30C, 40.
- the refrigerant discharged from the compressor 21 is distributed based on the priority preset by the user, and the surplus is further distributed based on the priority. Therefore, the user sets the priority of the indoor units 30A to 30B and 40 according to the use of the work spaces A1 to A3 and the hot water supply room B1 of the office building 100, for example, so that the heat pump system can be used according to the purpose of use. 10 can be efficiently operated.
- the user sets the priority for the workspace according to the frequency of use and importance, so that the total maximum cooling capacity of the indoor units exceeds the maximum cooling capacity of the outdoor units.
- the indoor unit of the work space where the necessity for air conditioning is high can be operated at the rated capacity. Thereby, the comfort of the said work space is securable.
- each indoor unit can be efficiently operated within the range of the cooling capacity of the outdoor units.
- the heat pump system 10 includes three indoor units 30A to 30C that exchange heat between the refrigerant and room air, and one indoor unit 40 that exchanges heat between the refrigerant and tap water.
- the heat pump system 10 may include four or more indoor units that exchange heat between the refrigerant and the indoor air.
- FIG. 6 is a diagram illustrating a heat pump system 11 according to the second embodiment. As shown in FIG. 6, the heat pump system 11 is different from the heat pump system 10 according to the first embodiment in that the indoor unit 40 has a secondary refrigeration cycle.
- the indoor unit 40 includes heat exchangers 41 and 51, a compressor 52, and expansion valves 42 and 53.
- the heat exchangers 41 and 51, the expansion valve 53, and the compressor 52 are connected in series by a refrigerant pipe 57.
- a secondary refrigeration cycle is configured, and the heat pump system 11 as a whole configures a two-stage cascade refrigeration cycle.
- the refrigerant in the secondary refrigeration cycle for example, Freon gas R134a having a high critical temperature is used.
- the heat exchanger 41 functions as an evaporation heat source for the secondary refrigeration cycle.
- the refrigerant circulating in the refrigerant pipe 57 passes through the heat exchanger 41, it is heated to the condensation temperature.
- the heat exchanger 51 heat exchange is performed between the refrigerant heated to the condensation temperature and the tap water circulating through the water pipe 61. Thereby, tap water is heated and warm water is made.
- FIG. 7 is a block diagram of the indoor unit 40 constituting the heat pump system 11. As shown in FIG. 7, the indoor unit 40 detects a drive device 405 that drives the compressor 52, a pressure sensor 406 that detects the pressure of the refrigerant flowing into the compressor 52, and the pressure of the refrigerant that flows out of the compressor 52. Pressure sensor 407 is provided.
- the drive device 405 has the same configuration as the drive device 202 described in the first embodiment.
- the driving device 405 drives the compressor 52 based on an instruction from the control device 401.
- control device 401 uses the temperature sensor 403 to monitor the temperature of tap water after heat exchange with the refrigerant in the heat exchanger 51 is completed. And the control apparatus 401 controls the opening degree of the expansion valve 53 while controlling the output of the compressor 52 so that the temperature of tap water may turn into desired temperature. Control of the compressor 52 is performed by changing the frequency f of the drive voltage applied to the compressor 52, for example.
- the amount of heat HQ1 required by the heat exchanger 41 can be obtained by subtracting the input W of the compressor 52 from the amount of heat HQ2 used by the indoor unit 40 for hot water supply, as shown in the following equation (5).
- HQ1 HQ2-WD ... (5)
- HQ1 HQ2 (1-1 / COP) (6)
- the coefficient of performance COP generally includes the temperature of the refrigerant flowing into the compressor 52 (primary side temperature) as ET (° C.), the temperature of the refrigerant discharged from the compressor 52 (secondary side temperature) as CT (° C.), and compression.
- the amount of heat HQ1 required by the heat exchanger 41 is the amount of heat used by the indoor unit 40 for hot water supply as shown in the following equation (8). It can be determined from HQ2, the primary side temperature ET and the secondary side temperature CT of the compressor 52.
- HQ1 HQ2 [1-1 / ⁇ (CT + 273.15) / (CT-ET) ⁇ ⁇ ] (8)
- the control device 401 obtains the primary side temperature ET based on the output from the pressure sensor 406 and obtains the secondary side temperature CT based on the output from the pressure sensor 407. Next, the control device 401 substitutes the calculated temperatures ET, CT and the amount of heat HQ2 used by the indoor unit 40 for hot water supply into the above equation (8), thereby obtaining the amount of heat HQ1 required by the heat exchanger 41. Ask. And the control apparatus 401 notifies the said control apparatus 201 of the request
- control device 201 supplies the refrigerant of the desired required amount Q (n) to the indoor unit 40.
- the amount of heat HQ1 required by the heat exchanger 41 is obtained in real time, and this amount of heat is obtained.
- the required amount Q (n) of the refrigerant in the primary refrigeration cycle defined from HQ1 can be obtained.
- Equation (5) if the input to the compressor 52 is known, the required heat quantity for the first refrigeration cycle can be obtained. Therefore, the input to the compressor 52 may be calculated, and the required heat amount for the first refrigeration cycle may be obtained using the measurement result. Also in this case, the refrigerant distributed by the outdoor unit 20 can be adjusted according to the operating state.
- this invention is not limited by the said embodiment.
- the capacity of the heat exchanger 23 of the outdoor unit 20 is constant.
- the present invention is not limited to this, and when the sum of the requested amounts Q from the indoor units exceeds the maximum amount QM of the refrigerant discharged from the compressor 21, a measure for improving the cooling efficiency of the refrigerant may be performed.
- this measure it is conceivable to increase the thermal conductance indicated as the product of the heat transfer area and the heat passage rate in the outdoor unit or each indoor unit. Specifically, it is conceivable to increase the fan output of the heat exchanger provided in each unit.
- FIG. 8 is a diagram illustrating an example of processing executed by the control device 201 of the outdoor unit 20.
- the outdoor unit 20 compares the total amount ⁇ Q of the requested refrigerant amount Q from the indoor units 30A to 30C, 40 with the maximum amount QM of the compressor 21 (step S301).
- the control device 201 operates the fan of the heat exchanger 23 at the rotation speed N1.
- step S302 determines that the total amount ⁇ Q is larger than the maximum amount QM of the compressor 21 (step S302: No)
- the fan of the heat exchanger 23 has a rotational speed N2 higher than the rotational speed N1. Drive on.
- Freon gas R410A is used as the refrigerant circulating in the primary refrigeration cycle and Freon gas R134a is used as the refrigerant circulating in the secondary refrigeration cycle.
- natural refrigerants such as carbon dioxide (CO 2 ), hydrocarbons, helium, etc.
- refrigerants that do not contain chlorine such as R407C, R404A, HFO1234yf, HFO1234ze, or existing products are used.
- a CFC-based refrigerant such as R22 may be used.
- the refrigerant used in the primary refrigeration cycle and the refrigerant used in the secondary refrigeration cycle may be the same type or different types.
- heat exchange heat exchange is performed between the primary refrigeration cycle and the secondary refrigeration cycle without the refrigerants mixing with each other.
- the hot water supply temperature be 60 ° C or higher in order to suppress the growth of Legionella bacteria in tap water. Therefore, it is desirable that the target temperature for hot water supply is at least 60 ° C. or higher. Based on the above, it is desirable to use a refrigerant having a critical temperature of 60 ° C. or higher as the refrigerant in the secondary refrigeration cycle. It is considered that a high COP can be stably obtained at low cost by using such a refrigerant as a refrigerant for the secondary refrigeration cycle.
- the functions of the outdoor control unit 120 and the indoor control units 130A to 130C, 140 according to the above embodiment can be realized by dedicated hardware or by a normal computer system.
- the programs stored in the auxiliary storage unit 201c of the control device 201 are a flexible disk, a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), and an MO (Magneto-Optical Disk).
- a device that executes the above-described processing may be configured by storing and distributing the program in a computer-readable recording medium such as the computer and installing the program. Further, the program may be stored in a disk device or the like of a predetermined server device on a communication network such as the Internet, and may be downloaded, for example, superimposed on a carrier wave.
- control device 201 of the outdoor unit 20 executes the series of processes shown in FIG.
- an independent control device common to the outdoor unit and the indoor unit controls the compressor 21, the four-way valve 22 and the like of the outdoor unit 20, and the expansion valves 32, 42, and 40 of the indoor units 30A to 30C, 40. 53 or the like may be controlled.
- the processing executed by the control device 201 of the outdoor unit 20 may be executed by the control devices 301 and 401 of the indoor units 30A to 30C and 40.
- the heat pump system, the control device, the temperature adjustment method, and the program of the present invention are suitable for temperature adjustment of a temperature adjustment target.
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Abstract
Description
温調対象と冷媒との間で熱交換を行う複数の室内ユニットと、
外気と冷媒との間で熱交換を行う室外ユニットと、
複数の前記室内ユニットと前記室外ユニットとの間で、冷媒を循環させる第1循環系と、
前記室内ユニットごとに設けられ、前記第1循環系から前記室内ユニットへ流入する冷媒の量を調整するための調整手段と、
前記室内ユニットに設定される優先度を入力するための入力手段と、
複数の前記室内ユニットそれぞれの前記温調対象の温調目標温度と前記温調対象の現在の温度とに基づいて求められる、複数の前記室内ユニットそれぞれで必要な冷媒の流量の合計が、前記室外ユニットから、前記第1循環系へ吐出されうる冷媒の流量を超える場合に、前記優先度が高い前記室内ユニットから順に、前記室内ユニットが必要とする流量の冷媒が前記室内ユニットに供給されるように、前記調整手段を制御して、冷媒を分配する制御手段と、
を備える。
以下、本発明の第1の実施形態を、図面を参照しつつ説明する。図1は、一例としてオフィスビル100に設置されたヒートポンプシステム10のブロック図である。オフィスビル100は、3つのワークスペースA1,A2,A3と、給湯室B1を有している。そして、ヒートポンプシステム10は、オフィスビル100のワークスペースA1~A3に配置される室内ユニット30A~30Cと、給湯室B1に配置される室内ユニット40と、オフィスビル100の屋上に配置される室外ユニット20を有している。各室内ユニット30A~30C,40は、冷媒を循環させるための循環系50によって、室外ユニット20と接続されている。
次に、本発明の第2の実施形態を、図面を参照しつつ説明する。なお、第1の実施形態と同一又は同等の構成については、同等の符号を用いる。図6は、第2の実施形態に係るヒートポンプシステム11を示す図である。図6に示されるように、ヒートポンプシステム11は、室内ユニット40が、2次冷凍サイクルを有している点で、第1の実施形態に係るヒートポンプシステム10と相違している。
20 室外ユニット
21 圧縮機
22 四方弁
23 熱交換器
24,25 継手
26 冷媒配管
30A~30C 室内ユニット
31 熱交換器
32 膨張弁
33 継手
34 継手
35 冷媒配管
40 室内ユニット
41,51 熱交換器
42,53 膨張弁
43,44 継手
47 冷媒配管
50 循環系
50a,50b 冷媒配管
52 圧縮機
57 冷媒配管
60 給水ポンプ
61 水道管
100 オフィスビル
120 室外制御ユニット
130A~130C,140 室内制御ユニット
201 制御装置
201a CPU
201b 主記憶部
201c 補助記憶部
201d インタフェース
201e バス
202 駆動装置
301 制御装置
302 入力部
303 温度センサ
304 弁駆動回路
401 制御装置
402 入力部
403 温度センサ
404 弁駆動回路
405 駆動装置
406,407 圧力センサ
A1~A3 ワークスペース
B1 給湯室
R1~R4 開度
Claims (13)
- 温調対象と冷媒との間で熱交換を行う複数の室内ユニットと、
外気と冷媒との間で熱交換を行う室外ユニットと、
複数の前記室内ユニットと前記室外ユニットとの間で、冷媒を循環させる第1循環系と、
前記室内ユニットごとに設けられ、前記第1循環系から前記室内ユニットへ流入する冷媒の量を調整するための調整手段と、
前記室内ユニットに設定される優先度を入力するための入力手段と、
複数の前記室内ユニットそれぞれの前記温調対象の温調目標温度と前記温調対象の現在の温度とに基づいて求められる、複数の前記室内ユニットそれぞれで必要な冷媒の流量の合計が、前記室外ユニットから、前記第1循環系へ吐出されうる冷媒の流量を超える場合に、前記優先度が高い前記室内ユニットから順に、前記室内ユニットが必要とする流量の冷媒が前記室内ユニットに供給されるように、前記調整手段を制御して、冷媒を分配する制御手段と、
を備えるヒートポンプシステム。 - 前記制御手段は、前記室内ユニットに要求される冷媒の流量の比に応じて、前記冷媒を分配する請求項1に記載のヒートポンプシステム。
- 前記制御手段は、優先度が最も高い前記室内ユニットについては、当該室内ユニットから要求される流量の冷媒が供給されるように、前記調整手段を制御する請求項1又は2に記載のヒートポンプシステム。
- 前記制御手段は、優先度が最も高い前記室内ユニットに、当該室内ユニットから要求される流量の冷媒を供給した後の余剰冷媒を、他の前記室内ユニットに分配する請求項3に記載のヒートポンプシステム。
- 前記余剰冷媒を、他の前記室内ユニットから要求される比に応じて分配する請求項4に記載のヒートポンプシステム。
- 前記第1循環系は、複数の前記室内ユニットに要求される冷媒の流量の合計が、前記室外ユニットから吐出される冷媒の最大流量を超える場合に、前記室外ユニットから吐出される冷媒の熱量を、複数の前記室内ユニットに要求される冷媒の流量の合計が、前記室外ユニットから吐出される冷媒の最大流量以下のときよりも増加させる請求項1乃至5のいずれか一項に記載のヒートポンプシステム。
- 前記室内ユニットは、前記第1循環系を循環する冷媒との間で熱交換が行われる冷媒を循環させるための第2循環系と、
前記第2循環系の冷媒を循環させる圧縮機と、
前記第1循環系の冷媒と、前記第2循環系の冷媒との間で熱交換を行うことで、前記第2循環系の蒸発熱源として機能する第1熱交換手段と、
前記熱交換手段で必要な熱量と、前記圧縮機の運転状態に基づいて、前記室外ユニットへ要求する要求熱量を求める算出手段と、
を備える請求項1乃至6のいずれか一項に記載のヒートポンプシステム。 - 前記算出手段は、前記熱交換手段で必要な熱量と、前記圧縮機への入力とを用いて、前記要求熱量を算出する請求項7に記載のヒートポンプシステム。
- 前記算出手段は、前記熱交換手段で必要な熱量と、前記圧縮機の成績係数を用いて、前記要求熱量を算出する請求項7に記載のヒートポンプシステム。
- 前記室内ユニットは、
前記第2循環系を循環する冷媒と、給湯系統を流れる前記温調対象としての水との間で熱交換を行う第2熱交換手段を備え、
前記第2循環系を循環する冷媒の臨界温度は60℃以上である請求項7乃至9のいずれか一項に記載のヒートポンプシステム。 - 複数の室内ユニットそれぞれの温調対象の温調目標温度と、前記温調対象の現在の温度とによって求められる、複数の前記室内ユニットそれぞれで必要な冷媒の流量を求める手段と、
前記室内ユニットそれぞれで必要な冷媒の流量の合計量を算出する手段と、
前記合計量が、室外ユニットから前記室内ユニットへ供給される冷媒の量を超える場合に、前記室内ユニットに割り当てられた優先度が高い順に、前記室内ユニットが必要とする流量の冷媒が前記室内ユニットに供給されるように、前記室内ユニットの分配手段を制御する手段と、
を備える制御装置。 - 複数の室内ユニットそれぞれの温調対象の温調目標温度と、前記温調対象の現在の温度とによって求められる、複数の前記室内ユニットそれぞれで必要な冷媒の流量を求める工程と、
前記室内ユニットそれぞれで必要な冷媒の流量の合計量を算出する工程と、
前記合計量が、室外ユニットから前記室内ユニットへ供給される冷媒の量を超える場合に、前記室内ユニットに割り当てられた優先度が高い順に、前記室内ユニットが必要とする流量の冷媒が前記室内ユニットに供給されるように、前記冷媒を前記室内ユニットに分配する工程と、
を含む温調方法。 - コンピュータに、
複数の室内ユニットそれぞれの温調対象の温調目標温度と、前記温調対象の現在の温度とによって求められる、複数の前記室内ユニットそれぞれで必要な冷媒の流量を求める手順と、
前記室内ユニットそれぞれで必要な冷媒の流量の合計量を算出する手順と、
前記合計量が、室外ユニットから前記室内ユニットへ供給される冷媒の量を超える場合に、前記室内ユニットに割り当てられた優先度が高い順に、前記室内ユニットが必要とする流量の冷媒が前記室内ユニットに供給されるように、前記室内ユニットの分配手段を制御する手順と、
を実行させるためのプログラム。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201180074372.3A CN103890502B (zh) | 2011-10-24 | 2011-10-24 | 热泵系统、控制装置、调温方法以及程序 |
| EP11874826.8A EP2772703B1 (en) | 2011-10-24 | 2011-10-24 | Heat pump system, temperature adjustment method, and program |
| JP2013540525A JP5774116B2 (ja) | 2011-10-24 | 2011-10-24 | ヒートポンプシステム、制御装置、温調方法及びプログラム |
| PCT/JP2011/074466 WO2013061399A1 (ja) | 2011-10-24 | 2011-10-24 | ヒートポンプシステム、制御装置、温調方法及びプログラム |
| US14/353,558 US9644872B2 (en) | 2011-10-24 | 2011-10-24 | Heat pump system, control device, temperature adjustment method, and program |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/074466 WO2013061399A1 (ja) | 2011-10-24 | 2011-10-24 | ヒートポンプシステム、制御装置、温調方法及びプログラム |
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Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9644872B2 (ja) |
| EP (1) | EP2772703B1 (ja) |
| JP (1) | JP5774116B2 (ja) |
| CN (1) | CN103890502B (ja) |
| WO (1) | WO2013061399A1 (ja) |
Cited By (2)
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| JP2014219152A (ja) * | 2013-05-08 | 2014-11-20 | 三菱電機株式会社 | 空気調和装置 |
| WO2021255884A1 (ja) | 2020-06-18 | 2021-12-23 | 三菱電機株式会社 | 空調システムおよび空調システムの電力量を制御する方法 |
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| JP6021937B2 (ja) * | 2012-11-13 | 2016-11-09 | 三菱電機株式会社 | 空気調和システム及び中央管理装置 |
| EP3032194A1 (en) * | 2014-12-12 | 2016-06-15 | Danfoss A/S | A method for controlling a supply of refrigerant to an evaporator including calculating a reference temperature |
| US12391097B2 (en) | 2015-11-03 | 2025-08-19 | Carrier Corporation | Transport refrigeration system and method of operating |
| JP6624219B2 (ja) * | 2018-02-23 | 2019-12-25 | ダイキン工業株式会社 | 空気調和機 |
| CN115218308B (zh) * | 2022-07-19 | 2025-08-22 | 光之科技(北京)有限公司 | 智能变温控制系统及方法 |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20140297057A1 (en) | 2014-10-02 |
| US9644872B2 (en) | 2017-05-09 |
| JPWO2013061399A1 (ja) | 2015-04-02 |
| EP2772703A1 (en) | 2014-09-03 |
| EP2772703A4 (en) | 2015-07-29 |
| CN103890502A (zh) | 2014-06-25 |
| JP5774116B2 (ja) | 2015-09-02 |
| EP2772703B1 (en) | 2019-11-27 |
| CN103890502B (zh) | 2017-03-01 |
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