WO2009141979A1 - Système de climatisation - Google Patents

Système de climatisation Download PDF

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Publication number
WO2009141979A1
WO2009141979A1 PCT/JP2009/002125 JP2009002125W WO2009141979A1 WO 2009141979 A1 WO2009141979 A1 WO 2009141979A1 JP 2009002125 W JP2009002125 W JP 2009002125W WO 2009141979 A1 WO2009141979 A1 WO 2009141979A1
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WO
WIPO (PCT)
Prior art keywords
water
heat
heat transfer
heat exchanger
storage tank
Prior art date
Application number
PCT/JP2009/002125
Other languages
English (en)
Japanese (ja)
Inventor
谷本啓介
川端克宏
浅井英明
川添政宣
Original Assignee
ダイキン工業株式会社
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
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Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Publication of WO2009141979A1 publication Critical patent/WO2009141979A1/fr

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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
    • 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
    • F24F5/0096—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 combined with domestic apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/31—Air conditioning systems
    • 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]
    • Y02B30/12—Hot water central heating systems using heat pumps

Definitions

  • the present invention relates to an air conditioning system that cools a room using cold heat generated by a refrigeration cycle.
  • Patent Document 1 discloses an air conditioning system that circulates water between an evaporator of a refrigerant circuit and a fan coil unit, and cools the room using cold water supplied from the evaporator to the fan coil unit. (See FIG. 10 of Patent Document 1).
  • the air conditioning system disclosed in Patent Document 1 is configured to store water heated in a condenser of a refrigerant circuit during cooling operation in a tank and use hot water in the tank for hot water supply.
  • cold water tank for storing cold water and temporarily store cold heat in the cold water tank. If such a cold water tank is provided in the air conditioning system, for example, cold water can be stored in the cold water tank at night when the cooling load is small, and the cold water in the cold water tank can be used for cooling in the daytime when the cooling load is large.
  • the present invention has been made in view of such points, and an object thereof is to avoid complication of the configuration of an air conditioning system capable of storing both hot and cold.
  • the first invention includes a heat transfer circuit (30) to which a heat transfer water is circulated and connected to the use side heat exchanger (35), and the heat transfer medium supplied to the use side heat exchanger (35).
  • the target is an air conditioning system that uses water to cool the room.
  • Each includes a heat source side heat exchanger (23) and a heating heat exchanger (82) for exchanging heat between the refrigerant and the heat transfer water, and the heating heat exchanger (82) serves as a radiator.
  • the transfer circuit (30) includes a water storage tank (37) for storing heat transfer water, and supplies the heat transfer water cooled in the heat source side heat exchanger (23) to the lower part of the water storage tank (37).
  • the refrigerant circuit (21) performs an operation for cooling hot water supply during the cooling operation of the air conditioning system (10).
  • the heat transfer circuit (30) In the state where the refrigerant circuit (21) is performing the operation for cooling and hot water supply, in the heat transfer circuit (30), the heat transfer water is cooled in the heat source side heat exchanger (23) operating as an evaporator, The heat transfer water is heated in the operating heat exchanger (82).
  • the heat transfer circuit (30) is performing the cold storage heat operation
  • the heat transfer water cooled in the heat source side heat exchanger (23) is sent to the lower part of the water storage tank (37).
  • the heat transfer water (that is, the low-temperature heat transfer water) cooled in the heat source side heat exchanger (23) has a higher density than the normal temperature heat transfer water, and therefore accumulates in the lower part of the water storage tank (37). Further, in the state where the heat transfer circuit (30) is performing the water boiling operation, the heat transfer water heated in the heating heat exchanger (82) is sent to the upper part of the water storage tank (37). The heat transfer water (that is, high-temperature heat transfer water) heated in the heating heat exchanger (82) has a lower density than the normal temperature heat transfer water, and therefore accumulates in the upper part of the water storage tank (37).
  • the low-temperature heat transfer water is stored in the lower part, and the high-temperature heat transfer water is stored in the upper part. That is, both the cold heat and the warm heat are stored in the water storage tank (37) of the present invention.
  • the heat transfer circuit (30) uses the heat transfer water cooled in the heat source side heat exchanger (23) as the heat transfer side water exchanger (35) and
  • the operation to supply both of the lower part of the water storage tank (37) is performed as a cold storage heat operation, the heat transfer water cooled in the heat source side heat exchanger (23) and the heat stored in the lower part of the water storage tank (37).
  • the operation of supplying both of the medium water to the use side heat exchanger (35) is performed as a use cooling operation, while only the heat transfer water cooled in the heat source side heat exchanger (23) is used as the use side heat exchanger.
  • the normal cooling operation supplied to (35), the cold storage heat operation, and the use cooling operation are selectively executed during the cooling operation.
  • the heat transfer circuit (30) selectively performs a normal cooling operation, a cold storage heat operation, and a use cooling operation.
  • the normal cooling operation only the cooling heat obtained by the refrigeration cycle in the refrigerant circuit (21) is used for indoor cooling. Therefore, the normal cooling operation is suitable for performing in a state where the amount of heat generated by the refrigerant circuit (21) and the indoor cooling load are balanced.
  • the cold storage heat operation part of the cold heat obtained by the refrigeration cycle in the refrigerant circuit (21) is used for indoor cooling, and the remainder is stored in the water storage tank (37).
  • the cold storage heat operation is performed in a state where the amount of cooling heat generated in the refrigerant circuit (21) is too much with respect to the indoor cooling load, excess cooling heat is stored in the water storage tank (37).
  • all of the cold heat obtained by the refrigeration cycle in the refrigerant circuit (21) and the cold heat stored in the water storage tank (37) are used for indoor cooling. If the cooling operation is performed in a state where the amount of heat generated by the refrigerant circuit (21) is insufficient with respect to the indoor cooling load, the amount of heat generated by the refrigerant circuit (21) can be met without increasing the amount of cooling heat. Cooling capacity is obtained.
  • the refrigerant circuit (21) includes an outdoor heat exchanger (25) for exchanging heat between the refrigerant and outdoor air, and the outdoor heat exchanger (25)
  • the cooling-only operation and the cooling hot-water supply operation are selectively executed by circulating the refrigerant so that the heat source side heat exchanger (23) becomes an evaporator and the heat source side heat exchanger (23) becomes an evaporator. .
  • the refrigerant circuit (21) selectively performs the cooling only operation and the cooling hot water supply operation.
  • the refrigerant circuit (21) performs an operation for cooling hot water supply.
  • the refrigerant circuit (21) performs the cooling only operation.
  • the refrigerant radiates heat to the outdoor air.
  • the heat transfer circuit (30) uses the heat transfer water stored in the central portion in the height direction of the water storage tank (37) as described above.
  • the operation of supplying the heat transfer water supplied to the heating heat exchanger (82) and heated by the heating heat exchanger (82) to the upper portion of the water storage tank (37) is performed as the boiling water operation. .
  • the heat transfer water stored in the central portion in the height direction of the water storage tank (37) is heated in the heat exchanger (82) for heating. After that, it is sent to the upper part of the water storage tank (37).
  • the high-temperature heat heated in the heating heat exchanger (82) is located above the position where the heat transfer water flows toward the heating heat exchanger (82). Medium water is stored. Also, most of the low-temperature heat transfer water stored in the lower part of the internal space of the water storage tank (37) from the position where the heat transfer water flows out toward the heat exchanger for heating (82). Stays in the water tank (37).
  • water supplied from the water supply is fed into the heat transfer circuit (30) into the central portion in the height direction of the water storage tank (37) during the tapping operation.
  • a water supply passage (90) is provided.
  • a water supply passage (90) is provided in the heat transfer circuit (30).
  • high-temperature heat transfer water stored in the upper part of the water storage tank (37) is supplied to the water faucet etc. as hot water for hot water supply, Water is supplied to the tank (37).
  • the water supply passage (90) introduces water into the central portion in the height direction of the water storage tank (37) in the internal space of the water storage tank (37).
  • the heating operation of heating the room using the heat transfer water supplied to the use side heat exchanger (35) and the cooling operation are selectively executed.
  • the refrigerant circuit (21) is used for heating that performs a refrigeration cycle by circulating refrigerant so that the heat source side heat exchanger (23) serves as a radiator and the outdoor heat exchanger (25) serves as an evaporator. While the operation is performed during the heating operation, the heat transfer circuit (30) normally supplies only the heat transfer water heated by the heat source side heat exchanger (23) to the use side heat exchanger (35).
  • the air conditioning system (10) selectively performs the cooling operation and the heating operation.
  • the refrigerant circuit (21) performs a heating operation
  • the heat transfer circuit (30) selectively performs a normal heating operation, a heat storage heat operation, and a use heating operation.
  • the normal heating operation only the heat obtained by the refrigeration cycle in the refrigerant circuit (21) is used for indoor heating. Therefore, the normal heating operation is suitable for performing in a state where the amount of heat generated by the refrigerant circuit (21) and the indoor heating load are balanced.
  • the heat storage heat operation part of the heat obtained by the refrigeration cycle in the refrigerant circuit (21) is used for room heating, and the rest is stored in the water storage tank (37). If the heat storage operation is performed in a state where the amount of heat generated by the refrigerant circuit (21) is too much for the indoor heating load, excess heat is stored in the water storage tank (37). In the use heating operation, all of the heat obtained by the refrigeration cycle in the refrigerant circuit (21) and the heat stored in the water storage tank (37) are used for room heating.
  • the heating operation is performed in a state where the amount of heat generated by the refrigerant circuit (21) is insufficient with respect to the indoor heating load, even if the amount of heat generated by the refrigerant circuit (21) is not increased, it is commensurate with the heating load. Heating capacity is obtained.
  • the heat transfer circuit (30) supplies the water supply tank (37) from the water supply to the central portion in the height direction during the hot water operation performed in the cooling operation.
  • the water supply passage (90) for feeding the water supplied from the water supply to the lower part of the water storage tank (37) is provided during the hot water operation performed in the heating operation.
  • the heating medium stored in the central portion in the height direction of the water storage tank (37) is supplied to the heating heat exchanger (82) and heated in the heating heat exchanger (82).
  • the operation of sending water to the upper portion of the water storage tank (37) is performed as a water heater operation.
  • the heat transfer water stored in the lower portion of the water storage tank (37) is transferred to the heat source side heat exchanger (23 ) And heated in the heat source side heat exchanger (23)
  • the operation of sending the medium water to the upper part of the water storage tank (37) is performed as a water heater operation.
  • the heat transfer water stored in the central portion in the height direction of the water storage tank (37) is used as a heat exchanger for heating. After being heated in (82), it is sent to the upper part of the water storage tank (37). In the internal space of the water storage tank (37), the heat transfer water heated in the heating heat exchanger (82) is located above the position where the heat transfer water flows toward the heat exchanger (82) for heating. (That is, high-temperature heat transfer water) is stored. Also, most of the low-temperature heat transfer water stored in the lower part of the internal space of the water storage tank (37) from the position where the heat transfer water flows out toward the heat exchanger for heating (82).
  • the high-temperature heat transfer water stored in the upper part of the water storage tank (37) is supplied as hot water for hot water supply to a water faucet or the like.
  • Water is supplied to the water storage tank (37) through the water supply passage (90).
  • the water supply passage (90) introduces water into the central portion in the height direction of the water storage tank (37) in the internal space of the water storage tank (37).
  • the heat transfer water stored in the lower part of the water storage tank (37) is converted into the heat source side heat exchanger (23). And heated to the upper part of the water storage tank (37).
  • high-temperature heat heated in the heat source side heat exchanger (23) is located above the position where the heat transfer water flows toward the heat source side heat exchanger (23).
  • Medium water is stored. That is, high-temperature heat transfer water is stored in almost the entire internal space of the water storage tank (37).
  • the high-temperature heat transfer water stored in the upper part of the water storage tank (37) is supplied as hot water for hot water supply to a water faucet and the like.
  • Water is supplied to the water storage tank (37) through the water supply passage (90).
  • the water supply passage (90) introduces water into the lower part of the internal space of the water storage tank (37).
  • heat medium water cooled in the heat source side heat exchanger (23) operating as an evaporator (that is, heat medium water having a low temperature and a high density) is supplied to the lower part of the water storage tank (37), Heat transfer water heated in the heating heat exchanger (82) operating as a radiator (ie, high temperature and low density heat transfer water) is supplied to the upper part of the water storage tank (37).
  • Heat transfer water heated in the heating heat exchanger (82) operating as a radiator ie, high temperature and low density heat transfer water
  • the air conditioning system (10) of the present invention it is possible to store both cold and hot heat in one water storage tank (37). Therefore, according to the present invention, there is no need to separately install a tank for storing cold heat and a tank for storing hot heat in the air conditioning system (10), and it is possible to store both cold and hot air while The configuration of the system (10) can be kept simple.
  • the cooling capacity of the air conditioning system (10) can be adjusted using the water storage tank (37). That is, if the cold storage heat operation is performed when the amount of heat obtained by the refrigeration cycle in the refrigerant circuit (21) is too large for the indoor cooling load, excess cold heat is stored in the water storage tank (37). In addition, if the cooling operation is performed when the amount of cooling obtained by the refrigeration cycle in the refrigerant circuit (21) is insufficient with respect to the indoor cooling load, the shortage of cooling obtained by the refrigeration cycle is stored in the water storage tank (37).
  • the cooling capacity of the air conditioning system (10) is matched to the cooling load by using the water storage tank (37). Value can be set.
  • the refrigerant circuit (21) selectively performs the cooling only operation and the cooling hot water supply operation. For this reason, when the storage amount of the high-temperature heat transfer water in the water storage tank (37) is sufficient, the refrigerant circuit (21) performs the cooling only operation in which the outdoor heat exchanger (25) operates as a radiator. The room can be continuously cooled.
  • the heat transfer water stored in the central portion in the height direction of the water storage tank (37) is heated in the heating heat exchanger (82). After that, it is sent to the upper part of the water storage tank (37). Therefore, according to the present invention, the amount of the high-temperature heat transfer water stored in the upper part of the water storage tank (37) can be increased while holding the low-temperature heat transfer water in the lower part of the water storage tank (37). it can.
  • the heat transfer water in the heat transfer circuit (30) during the hot water operation, water supplied from the water supply flows into the central portion in the height direction of the water storage tank (37) through the water supply passage (90). . Therefore, according to the present invention, the heat transfer water can be replenished to the water storage tank (37) during the hot water operation while the low temperature heat transfer water is held in the lower part of the water storage tank (37).
  • the heating capacity of the air conditioning system (10) can be adjusted using the water storage tank (37). That is, if the heat storage operation is performed when the amount of heat obtained by the refrigeration cycle in the refrigerant circuit (21) is too much for the indoor heating load, excess heat is stored in the water storage tank (37). If the heating operation is performed when the amount of heat obtained by the refrigeration cycle in the refrigerant circuit (21) is insufficient for the indoor heating load, the shortage of heat obtained by the refrigeration cycle is stored in the hot water tank. Supplemented by warm heat. Therefore, according to the present invention, even when the amount of heat generated in the refrigerant circuit (21) cannot be adjusted, the heating capacity of the air conditioning system (10) is matched to the heating load by using the water storage tank (37). Value can be set.
  • the heat transfer water stored in the central portion in the height direction of the water storage tank (37) is used for heat exchange for heating. After being heated in the vessel (82), it is fed into the upper part of the water storage tank (37). Therefore, according to the present invention, the amount of the high-temperature heat transfer water stored in the upper part of the water storage tank (37) can be increased while holding the low-temperature heat transfer water in the lower part of the water storage tank (37).
  • the heat transfer water in the heat transfer circuit (30) performing the hot water operation during the cooling operation, water supplied from the water supply is supplied to the central portion in the height direction of the water storage tank (37). Inflow through (90). Therefore, according to the present invention, the heat transfer water can be replenished to the water storage tank (37) during the hot water operation while the low temperature heat transfer water is held in the lower part of the water storage tank (37).
  • the heat transfer water stored in the lower part of the water storage tank (37) is transferred to the heat source side heat exchanger (23 ) And then sent to the upper part of the water storage tank (37). Therefore, according to the present invention, high-temperature heat transfer water can be stored in the entire internal space of the water storage tank (37) during the heating operation in which it is not necessary to store cold heat in the water storage tank (37).
  • FIG. 1 is a piping diagram showing the configuration of the air conditioning system of the embodiment.
  • FIG. 2 is a piping system diagram of an air conditioning system showing a flow of heat source side heat transfer water in a heat transfer circuit that performs a normal cooling operation and a boiling water operation, and a refrigerant flow in a refrigerant circuit that performs an operation for cooling hot water supply.
  • FIG. 3 is a piping system diagram of the air conditioning system showing the flow of heat source side heat transfer water in the heat transfer circuit that performs the cold storage heat operation and the hot water boiling operation, and the flow of the refrigerant in the refrigerant circuit that performs the cooling hot water supply operation.
  • FIG. 1 is a piping diagram showing the configuration of the air conditioning system of the embodiment.
  • FIG. 2 is a piping system diagram of an air conditioning system showing a flow of heat source side heat transfer water in a heat transfer circuit that performs a normal cooling operation and a boiling water operation, and a refrigerant flow in a ref
  • FIG. 4 is a piping system diagram of the air conditioning system showing the flow of the heat source side heat transfer water in the heat transfer circuit that performs the use cooling operation and the hot water boiling operation, and the flow of the refrigerant in the refrigerant circuit that performs the cooling hot water supply operation.
  • FIG. 5 is a piping system diagram of the air conditioning system showing the flow of heat-source-side heat transfer water in the heat transfer circuit that performs the normal cooling operation and the hot water operation, and the refrigerant flow in the refrigerant circuit that performs the cooling-only operation.
  • FIG. 6 is a piping system diagram of the air conditioning system showing the flow of heat-source-side heat transfer water in the heat transfer circuit that performs normal heating operation and the flow of refrigerant in the refrigerant circuit that performs heating operation.
  • FIG. 7 is a piping system diagram of the air conditioning system showing the flow of the heat source side heat transfer water in the heat transfer circuit that performs the heat storage heat operation and the flow of the refrigerant in the refrigerant circuit that performs the heating operation.
  • FIG. 8 is a piping system diagram of the air conditioning system showing the flow of heat source side heat transfer water in the heat transfer circuit performing the heating operation and the flow of refrigerant in the refrigerant circuit performing the heating operation.
  • FIG. 9 is a piping system diagram of the air conditioning system showing the flow of the heat source side heat transfer water in the heat transfer circuit that performs the normal heating operation and the hot water operation, and the flow of the refrigerant in the refrigerant circuit that performs the heating operation.
  • the present embodiment is an air conditioning system (10) including an outdoor unit (15) that is a heat source device and an indoor circuit (70) that is a use side circuit.
  • the air conditioning system (10) is configured to selectively perform a cooling operation and a heating operation.
  • the air conditioning system (10) of the present embodiment is suitable for installation in a general household in a cold region, for example.
  • the indoor circuit (70) may be an existing one. That is, for example, when a heating system in which a boiler is connected to the indoor circuit (70) as a heat source is installed in a house or the like, the outdoor unit (15) is replaced with the indoor circuit (70) instead of the boiler that is the heat source. You may connect.
  • the outdoor unit (15) is provided with a refrigerant circuit (21) and a heat transfer circuit (30) which is a heat source side circuit.
  • the refrigerant circuit (21) is a closed circuit filled with refrigerant. This refrigerant circuit (21) is filled with a so-called chlorofluorocarbon refrigerant.
  • the refrigerant circuit (21) includes a compressor (22), a four-way switching valve (27), a heat source side heat exchanger (23), an expansion mechanism (24), and an outdoor heat exchanger (25). It has been.
  • the compressor (22) has its discharge side connected to the first port of the four-way switching valve (27) and its suction side connected to the second port of the four-way switching valve (27). Yes.
  • the outdoor heat exchanger (25), the expansion mechanism (24), and the heat source side heat exchanger (23) are sequentially arranged from the third port to the fourth port of the four-way switching valve (27). ) And are arranged.
  • a second refrigerant on-off valve (29b) is provided between the third port of the four-way switching valve (27) and the outdoor heat exchanger (25).
  • the refrigerant circuit (21) is provided with a heating pipe (28).
  • One end of the heating pipe (28) is connected to a pipe connecting the third port of the four-way switching valve (27) and the second refrigerant on / off valve (29b), and the other end is connected to the second refrigerant on / off valve. (29b) and a pipe connecting the outdoor heat exchanger (25).
  • a first refrigerant on-off valve (29a) and a heating heat exchanger (82) are arranged in order from the one end to the other end of the heating pipe (28).
  • Compressor (22) is a compressor with a fixed operating capacity. That is, the electric motor provided in the compressor (22) is always operated at a constant rotational speed.
  • the compressor (22) continuously operates without stopping during the operation of the air conditioning system (10). That is, the compressor (22) performs continuous operation without stopping while water is circulating in the heat transfer circuit (30).
  • the heat source side heat exchanger (23) is a plate heat exchanger and includes a plurality of primary side passages (23a) and secondary side passages (23b).
  • the heat source side heat exchanger (23) exchanges heat between the fluid flowing through the primary side passage (23a) and the fluid flowing through the secondary side passage (23b).
  • a primary passage (23a) of the heat source side heat exchanger (23) is connected to the refrigerant circuit (21).
  • the four-way switching valve (27) is in a first state in which the discharge side of the compressor (22) communicates with the outdoor heat exchanger (25) and the suction side of the compressor (22) communicates with the heat source side heat exchanger (23) ( In the second state, the discharge side of the compressor (22) communicates with the heat source side heat exchanger (23), and the suction side of the compressor (22) communicates with the outdoor heat exchanger (25). It is configured to switch to a state (a state indicated by a broken line in FIG. 1).
  • the expansion mechanism (24) is an electronic expansion valve with variable opening.
  • the outdoor heat exchanger (25) is a fin-and-tube heat exchanger that exchanges heat between the refrigerant and air.
  • An outdoor fan (26) for sending outdoor air to the outdoor heat exchanger (25) is provided in the vicinity of the outdoor heat exchanger (25).
  • the heating heat exchanger (82) is a plate heat exchanger, and includes a plurality of primary side passages (82a) and a plurality of secondary side passages (82b).
  • the heating heat exchanger (82) exchanges heat between the fluid flowing through the primary side passage (82a) and the fluid flowing through the secondary side passage (82b).
  • a primary passage (82a) of the heating heat exchanger (82) is connected to the heating pipe (28) of the refrigerant circuit (21).
  • the heat transfer circuit (30) is provided with a heat source side heat exchanger (23), a use side heat exchanger (35), and a heat storage tank (37) which is a water storage tank. In the heat transfer circuit (30), the heat source side heat transfer water flows.
  • the use side heat exchanger (35) is a plate heat exchanger and includes a plurality of primary side passages (35a) and a plurality of secondary side passages (35b).
  • the use side heat exchanger (35) exchanges heat between the fluid flowing through the primary side passage (35a) and the fluid flowing through the secondary side passage (35b).
  • a primary side passage (35a) of the use side heat exchanger (35) and a secondary side passage (23b) of the heat source side heat exchanger (23) are connected to the heat transfer circuit (30).
  • path (35b) of the utilization side heat exchanger (35) is connected to the indoor side circuit (70).
  • the heat transfer circuit (30) is provided with a supply passage (31a) and a return passage (31b).
  • One end of the supply passage (31a) is connected to the outlet end of the secondary passage (23b) of the heat source side heat exchanger (23), and the other end thereof is the primary passage (35a) of the use side heat exchanger (35). ) Is connected to the inlet end.
  • the supply passage (31a) is provided with a first open / close valve (41) that can be freely opened and closed.
  • one end of the return passage (31b) is connected to the outlet end of the primary passage (35a) of the use side heat exchanger (35), and the other end is the secondary passage of the heat source side heat exchanger (23). (23b) connected to the inlet end.
  • the return passage (31b) is provided with a main pump (36) having a variable discharge amount.
  • An outlet temperature sensor (16) for measuring the temperature of the heat-source-side heat transfer water flowing out from the use-side heat exchanger (35) is provided in the upstream portion of the main pump (36) in the return passage (31b). ) Is provided.
  • the heat storage tank (37) is a sealed container formed in a vertically long cylindrical shape.
  • the internal space of the heat storage tank (37) is a single continuous space from the lower end to the upper end.
  • the internal space of the heat storage tank (37) is filled with the heat-source-side heat transfer water, and the water temperature is higher above the internal space.
  • An escape passage (57) for releasing the pressure of the heat storage tank (37) is connected to the top of the heat storage tank (37).
  • a relief valve (56) is provided in the relief passage (57).
  • the heat storage tank (37) is connected to an inlet side passage (61) and an inflow passage (66) which are passages for allowing the heat source side heat transfer water to flow into the heat storage tank (37).
  • the heat storage tank (37) is connected to a hot water supply passage (64) and an outflow passage (67), both of which are passages for allowing the heat source side heat transfer water to flow out of the heat storage tank (37).
  • the inlet side passage (61) has one end branched into a first branch passage (61a) and a second branch passage (61b).
  • the first branch passage (61a) is connected near the upper end of the heat storage tank (37), and the second branch passage (61b) is connected near the lower end of the heat storage tank (37).
  • the first branch passage (61a) is provided with a second openable / closable valve (42), and the second branch passage (61b) is provided with a seventh openable / closable valve (47).
  • the other end of the inlet side passage (61) is connected between the heat source side heat exchanger (23) and the first on-off valve (41) in the supply passage (31a).
  • the inflow passage (66) is connected between the main pump (36) and the heat source side heat exchanger (23) in the return passage (31b).
  • the other end of the inflow passage (66) is connected to a central portion in the height direction of the heat storage tank (37) among the side surfaces of the heat storage tank (37).
  • the inflow passage (66) is provided with a tenth on-off valve (50) that can be freely opened and closed.
  • the hot water passage (64) is connected to the vicinity of the upper end of the heat storage tank (37).
  • the other end of the hot water passage (64) is connected between the first on-off valve (41) and the use side heat exchanger (35) in the supply passage (31a).
  • the hot water passage (64) is provided with a fifth open / close valve (45) that can be freely opened and closed.
  • the outflow passageway (67) is connected to the central portion in the height direction of the heat storage tank (37) on the side surface of the heat storage tank (37).
  • the other end of the outflow passage (67) is connected between the use side heat exchanger (35) and the main pump (36) in the return passage (31b).
  • the outflow passage (67) is provided with a ninth open / close valve (49) that can be freely opened and closed.
  • one end of the first communication passage (62a) is connected between the use side heat exchanger (35) and the main pump (36), and the main pump (36) and the heat source side heat exchanger (23 ) Is connected to one end of the second communication passage (62b).
  • the other ends of the first communication passage (62a) and the second communication passage (62b) are connected to one end of the merge passage (63).
  • the other end of the merge passage (63) is connected to the bottom of the heat storage tank (37).
  • the first communication passage (62a) is a passage for communicating the lower part of the heat storage tank (37) to the suction side of the main pump (36).
  • a fourth open / close valve (44) that can be freely opened and closed is provided in the first communication passage (62a).
  • the second communication passage (62b) is a passage for communicating the lower part of the heat storage tank (37) to the discharge side of the main pump (36).
  • a third open / close valve (43) that can be freely opened and closed is provided in the second communication passage (62b).
  • the cold water passage (65) is a passage for sending the heat source side heat transfer water below the heat storage tank (37) to the use side heat exchanger (35).
  • the water path (80) is provided in the heat transfer circuit (30).
  • the starting end of the water heating passage (80) is connected to the central portion in the height direction of the heat storage tank (37) among the side surfaces of the heat storage tank (37).
  • the end of the hot water passage (80) is connected to the downstream side of the second on-off valve (42) in the first branch passage (61a) of the inlet side passage (61). That is, the other end of the hot water passage (80) is connected to the vicinity of the upper end of the heat storage tank (37) via the first branch passage (61a) of the inlet side passage (61).
  • a sub pump (81), a heat exchanger (82) for heating, and a sixth openable / closable valve (46) that can be opened and closed are arranged in this water heater passage (80) in order from one end to the other end.
  • the heating heat exchanger (82) has a secondary side passage (82b) connected to the hot water passage (80).
  • a hot water supply passage (85) is provided in the heat transfer circuit (30). One end of the hot water supply passage (85) is connected between the heat storage tank (37) and the fifth on-off valve (45) in the hot water supply passage (64). The other end of the hot water supply passage (85) is connected to the water tap (87). A mixing valve (86) is provided in the middle of the hot water supply passage (85).
  • the heat transfer circuit (30) has a water supply passage (90).
  • the water supply passage (90) is a passage for supplying water to the heat transfer circuit (30) including the heat storage tank (37).
  • the water supply passage (90) includes a main passage (94), a first branch passage (91), a second branch passage (92), and a third branch passage (93).
  • the beginning of the main passage (94) is connected to the water supply.
  • a check valve (95) is provided in the main passage (94).
  • the check valve (95) is configured to allow water to flow from the start end to the end of the main passage (94) and to block water flow from the end to the start end of the main passage (94). .
  • the first branch passage (91) and the second branch passage (92) is connected to the end of the main passage (94).
  • the other end of the first branch passage (91) is connected to the merge passage (63).
  • the first branch passage (91) is provided with a first water supply on / off valve (96) that can be opened and closed.
  • the other end of the second branch passage (92) is connected to the central portion in the height direction of the heat storage tank (37) among the side surfaces of the heat storage tank (37).
  • the connection position of the second branch passage (92) of the water supply passage (90) to the heat storage tank (37) is substantially the same height as the connection position of the start end of the water heating passage (80) to the heat storage tank (37).
  • the second branch passage (92) is provided with a second water supply opening / closing valve (97) that can be freely opened and closed.
  • the third branch passage (93) has one end connected to the upstream side of the check valve (95) in the main passage (94) and the other end connected to the mixing valve (86).
  • the mixing valve (86) is configured to be able to adjust the flow rate of water flowing from the third branch passage (93) of the water supply passage (90) into the hot water supply passage (85).
  • the controller (55) is configured to open and close the on-off valves (41 to 50, 96, 97) provided in the heat transfer circuit (30) and to control the operation of the pump (36, 81).
  • the controller (55) also opens and closes the on-off valves (29a, 29b) provided in the refrigerant circuit (21), controls the operation of the compressor (22), adjusts the opening degree of the expansion mechanism (24), and a four-way switching valve. It is configured to switch (27).
  • the indoor side circuit (70) is a closed circuit filled with use side heat transfer water.
  • the indoor circuit (70) is provided with a plurality of indoor heat exchangers (75) that are heat exchangers for air conditioning.
  • An indoor heat exchanger (75) is a radiator for floor heating installed in the back side of the floor material which is a division member which divides a room, and a radiator installed in indoor space.
  • the plurality of indoor heat exchangers (75) are connected in parallel to each other.
  • the supply side header (73) is connected to the outlet end of the secondary side passage (35b) of the use side heat exchanger (35), and the supply side header (73)
  • One end of each indoor heat exchanger (75) is connected.
  • a return header (74) is connected to the inlet end of the secondary passage (35b) of the use side heat exchanger (35), and each return header (74) is connected to each indoor header (74). The other end of the heat exchanger (75) is connected.
  • an indoor pump (76) is provided between the return header (74) and the use side heat exchanger (35).
  • the discharge flow rate of the indoor pump (76) is set to a constant value.
  • a closed container-like expansion tank (78) is connected to the suction side of the indoor pump (76) to absorb the volume change of the use-side heat transfer water.
  • Air conditioning system cooling operation The cooling operation of the air conditioning system (10) will be described.
  • the compressor (22) of the refrigerant circuit (21), the main pump (36) of the heat transfer circuit (30), and the indoor pump (76) of the indoor circuit (70) ) And continuous operation.
  • the heat transfer circuit (30) selectively performs a normal cooling operation, a cold storage heat operation, and a use cooling operation. Further, the heat transfer circuit (30) performs a water heater operation and a hot water operation. In the heat transfer circuit (30), the water boiling operation and the hot water operation are performed independently. In other words, in this heat transfer circuit (30), both the water heater operation and the hot water operation may be executed simultaneously in parallel, or only one of the water heater operation and the hot water operation may be executed. There are cases where both the operation and the hot water operation are not executed. In addition, the heat transfer circuit (30) can perform a water boiling operation and a hot water discharge operation during the normal cooling operation, the cold storage heat operation, and the use cooling operation, respectively.
  • the refrigerant circuit (21) selectively performs a cooling hot water supply operation and a cooling dedicated operation.
  • This refrigerant circuit (21) performs cooling hot water supply operation when the heat transfer circuit (30) is performing a water heater operation, and operates exclusively for cooling when the heat transfer circuit (30) is not performing a water heater operation. I do.
  • the indoor pump (76) is operated, and the utilization side heat transfer water circulates between the utilization side heat exchanger (35) and the indoor heat exchanger (75).
  • the use side heat transfer water flowing into the secondary side passage (35b) of the use side heat exchanger (35) is cooled by the heat source side heat transfer water flowing through the primary side passage (35a).
  • the utilization side heat transfer water cooled by the utilization side heat exchanger (35) flows into the supply side header (73) and is distributed to each indoor heat exchanger (75).
  • the use-side heat transfer water absorbs heat, and the use-side heat transfer water temperature rises.
  • the use-side heat transfer water absorbed by each indoor heat exchanger (75) flows into the return header (74), joins and is sucked into the indoor pump (76), and then the use-side heat exchanger ( It flows into the secondary passage (35b) of 35).
  • the four-way switching valve (27) is set to the first state (the state indicated by the solid line in FIG. 2), and the first refrigerant on-off valve ( 29a) is set to the open state, and the second refrigerant on-off valve (29b) is set to the closed state. Further, the outdoor fan (26) stops during the cooling hot water supply operation of the refrigerant circuit (21).
  • a refrigeration cycle is performed in which the heating heat exchanger (82) operates as a condenser and the heat source side heat exchanger (23) operates as an evaporator.
  • the refrigerant discharged from the compressor (22) flows into the primary side passage (82a) of the heating heat exchanger (82) and flows through the secondary side passage (82b). Heat is condensed and condensed.
  • the refrigerant condensed in the heating heat exchanger (82) flows into the outdoor heat exchanger (25).
  • the outdoor fan (26) is stopped during the cooling hot water supply operation. Therefore, the refrigerant that has flowed into the outdoor heat exchanger (25) flows out of the outdoor heat exchanger (25) almost as it is without exchanging heat with the outdoor air.
  • the refrigerant that has flowed out of the outdoor heat exchanger (25) expands when passing through the expansion mechanism (24), and then flows into the primary passage (23a) of the heat source side heat exchanger (23).
  • the refrigerant absorbs heat from the heat source side heat transfer water flowing through the secondary side passage (23b) and evaporates.
  • the refrigerant evaporated in the heat source side heat exchanger (23) is sucked into the compressor (22) and compressed.
  • the sixth on-off valve (46) is set to the open state and the sub pump (81) is operated. In this state, in the heat transfer circuit (30), the heat source side heat transfer water flows through the water heating passage (80).
  • the sub pump (81) sucks in the heat source side heat transfer water stored in the heat storage tank (37). At that time, the heat source side heat transfer water that exists in the central portion in the height direction of the heat storage tank (37) in the internal space of the heat storage tank (37) flows into the hot water passage (80).
  • the temperature of the heat-source-side heat transfer water flowing into the water heater passage (80) is, for example, about 20 to 40 ° C.
  • the heat source side heat transfer water flowing into the water heater passage (80) flows into the secondary passage (82b) of the heating heat exchanger (82) and is heated by the refrigerant flowing through the primary passage (82a). .
  • the temperature of the heat source side heat transfer water flowing out from the secondary side passage (82b) of the heating heat exchanger (82) is, for example, about 80 to 90 ° C.
  • the heat source side heat transfer water flowing out of the heating heat exchanger (82) flows from the water heating passage (80) into the first branch passage (61a) of the inlet side passage (61), and then the heat storage tank (37). It is sent to near the upper end of the interior space.
  • the refrigerant circuit (21) may perform the cooling only operation.
  • the amount of heat source side heat transfer water stored in the heat storage tank (37) reaches a predetermined value, the operation of the refrigerant circuit (21) changes from the cooling hot water supply operation to the cooling only operation. And the water heating operation of the heat transfer circuit (30) is stopped.
  • the four-way switching valve (27) is set to the first state (the state indicated by the solid line in FIG. 5), and the first refrigerant on-off valve (29a ) Is set to the closed state, and the second refrigerant on-off valve (29b) is set to the open state. Further, during the cooling only operation of the refrigerant circuit (21), the outdoor fan (26) is operated.
  • a refrigeration cycle is performed in which the outdoor heat exchanger (25) operates as a condenser and the heat source side heat exchanger (23) operates as an evaporator.
  • the refrigerant discharged from the compressor (22) flows into the outdoor heat exchanger (25) after passing through the second refrigerant on-off valve (29b), and is sent by the outdoor fan (26). Heat is condensed and condensed.
  • the refrigerant condensed in the outdoor heat exchanger (25) expands when passing through the expansion mechanism (24), and then flows into the primary passage (23a) of the heat source side heat exchanger (23).
  • the refrigerant absorbs heat from the heat source side heat transfer water flowing through the secondary side passage (23b) and evaporates.
  • the refrigerant evaporated in the heat source side heat exchanger (23) is sucked into the compressor (22) and compressed.
  • the state of the sixth on-off valve (46) differs depending on whether or not the heat transfer circuit (30) is performing a water heating operation. As shown in FIG. 2, when the heat transfer circuit (30) is performing both the normal cooling operation and the kettle operation, the sixth on-off valve (46) is set to the open state. On the other hand, when the heat transfer circuit (30) performs the normal cooling operation and does not perform the water heating operation, the sixth on-off valve (46) is set to the closed state, and the refrigerant circuit (21) performs the cooling only operation. Do.
  • the heat source side heat transfer water flowing into the secondary side passage (23b) of the heat source side heat exchanger (23) is caused by the refrigerant flowing through the primary side passage (23a).
  • the heat source side heat transfer water cooled by the heat source side heat exchanger (23) flows into the primary side passage (35a) of the utilization side heat exchanger (35) through the supply passage (31a).
  • the heat source side heat transfer water absorbs heat from the use side heat transfer water in the secondary side passage (35b), and the temperature of the heat source side heat transfer water rises. .
  • the heat source side heat transfer water absorbed by the use side heat exchanger (35) is sucked into the main pump (36) through the return passage (31b), and then the secondary side passage of the heat source side heat exchanger (23).
  • the cold generated by the refrigeration cycle in the refrigerant circuit (21) is given to the heat source side heat transfer water, and the cold given to the heat source side heat transfer water is further given to the use side heat transfer water. . And the cold heat provided to the utilization side heat transfer water is utilized for indoor cooling.
  • the state of the sixth on-off valve (46) differs depending on whether or not the heat transfer circuit (30) is performing a water heating operation. As shown in FIG. 3, when the heat transfer circuit (30) is performing both the cold storage heat operation and the kettle operation, the sixth on-off valve (46) is set to the open state. On the other hand, when the heat transfer circuit (30) performs the cold storage heat operation and does not perform the water boiling operation, the sixth on-off valve (46) is set to the closed state, and the refrigerant circuit (21) performs the cooling only operation. Do.
  • the heat source side heat transfer water flowing into the secondary side passage (23b) of the heat source side heat exchanger (23) is caused by the refrigerant flowing through the primary side passage (23a).
  • a part of the heat-source-side heat transfer water cooled in the heat-source-side heat exchanger (23) flows through the supply passage (31a) into the primary-side passage (35a) of the use-side heat exchanger (35), The rest flows into the inlet passage (61).
  • the heat source side heat transfer water flowing into the primary side passage (35a) of the use side heat exchanger (35) absorbs heat from the use side heat transfer water of the secondary side passage (35b), as in normal cooling operation. It flows into the return passage (31b).
  • the heat-source-side heat transfer water flowing into the inlet-side passage (61) flows into the lower end portion of the internal space of the heat storage tank (37) through the second branch passage (61b).
  • the heat source side heat transfer water present at the center in the height direction of the internal space is pushed out to the outflow passage (67).
  • the amount of heat source side heat transfer water at a low temperature for example, about 5 ° C.
  • the amount of cold heat stored in the heat storage tank (37) increases.
  • the flow rate of the heat source side heat transfer water flowing out from the heat storage tank (37) to the outflow passage (67) is the heat source side heat transfer medium flowing into the heat storage tank (37) from the second branch passage (61b) of the inlet side passage (61). It becomes equal to the flow rate of water.
  • the heat-source-side heat transfer water flowing out from the heat storage tank (37) to the outflow passage (67) joins the heat-source-side heat transfer water absorbed in the use-side heat exchanger (35) and is sucked into the main pump (36). After that, it flows into the secondary passage (23b) of the heat source side heat exchanger (23).
  • the cold generated by the refrigeration cycle in the refrigerant circuit (21) is given to the heat source side heat transfer water.
  • a part of the cold energy given to the heat source side heat transfer water is given to the use side heat transfer water and used for indoor cooling, and the rest is stored in the heat storage tank (37).
  • the first on-off valve (41), the eighth on-off valve (48), and the tenth on-off valve (50) are set to the open state, and the second on-off valve (42)
  • the third on-off valve (43), the fourth on-off valve (44), the fifth on-off valve (45), the seventh on-off valve (47), and the ninth on-off valve (49) are set in a closed state.
  • the discharge flow rate of the main pump (36) is set to a larger value than during normal cooling operation.
  • the state of the sixth on-off valve (46) differs depending on whether or not the heat transfer circuit (30) is performing a water heating operation. As shown in FIG. 4, when the heat transfer circuit (30) is performing both the use cooling operation and the kettle operation, the sixth on-off valve (46) is set to the open state. On the other hand, when the heat transfer circuit (30) performs the use cooling operation and does not perform the water heating operation, the sixth on-off valve (46) is set to the closed state, and the refrigerant circuit (21) performs the cooling only operation. Do.
  • the heat-source-side heat transfer water flowing into the secondary-side passage (23b) of the heat-source-side heat exchanger (23) is cooled by the refrigerant flowing through the primary-side passage (23a). To be cooled.
  • the heat source side heat transfer water cooled by the heat source side heat exchanger (23) flows into the primary side passage (35a) of the utilization side heat exchanger (35) through the supply passage (31a).
  • the heat source side heat transfer water is fed into the heat storage tank (37) from the inflow passage (66) to the center in the height direction of the internal space. For this reason, from the heat storage tank (37), the low-temperature (for example, about 5 ° C.) heat source side heat transfer water present at the bottom of the internal space is pushed out to the junction passage (63).
  • the low-temperature heat-source-side heat transfer water flowing out from the heat storage tank (37) to the junction passage (63) flows into the supply passage (31a) through the cold water passage (65), and then the use-side heat exchanger (35) Into the primary passage (35a).
  • the amount of low-temperature heat source side heat transfer water decreases. That is, the amount of cold heat stored in the heat storage tank (37) decreases.
  • the flow rate of the heat source side heat transfer water flowing out from the heat storage tank (37) to the junction passage (63) is equal to the flow rate of the heat source side heat transfer water flowing into the heat storage tank (37) from the inflow passage (66).
  • the heat source side heat transfer water flowing into the primary side passage (35a) of the use side heat exchanger (35) absorbs heat from the use side heat transfer water of the secondary side passage (35b), as in normal cooling operation. It flows into the return passage (31b).
  • the heat source side heat transfer water flowing into the return passage (31b) is sucked into the main pump (36). Part of the heat source side heat transfer water discharged from the main pump (36) flows into the secondary side passage (23b) of the heat source side heat exchanger (23), and the rest passes through the inflow passage (66).
  • the heat-source-side heat transfer water that has flowed into the secondary-side passage (23b) of the heat-source-side heat exchanger (23) is cooled by the refrigerant in the primary-side passage (23a) as in the normal cooling operation.
  • both the cold heat generated by the refrigeration cycle in the refrigerant circuit (21) and the cold heat stored in the heat storage tank (37) are given to the use-side heat transfer water.
  • the cold heat provided to the utilization side heat transfer water is utilized for indoor cooling.
  • the first water supply opening / closing valve (96) is set to the closed state
  • the second water supply opening / closing valve (97) is set to the open state.
  • the A portion of the normal temperature water that flows from the water supply into the main passage (94) of the water supply passage (90) flows into the second branch passage (92), and the rest flows into the third branch passage (93).
  • the water that has flowed into the second branch passage (92) flows into the central portion in the height direction of the heat storage tank (37) in the internal space of the heat storage tank (37). For this reason, high-temperature (for example, about 80 to 90 ° C.) heat source side heat transfer water present at the upper end of the internal space of the heat storage tank (37) is pushed out to the hot water passage (64).
  • high-temperature for example, about 80 to 90 ° C.
  • the high-temperature heat-source-side heat transfer water flowing into the hot water supply passage (64) flows into the hot water supply passage (85) as hot water for hot water supply and flows toward the water tap (87).
  • the hot water flowing through the hot water supply passage (85) is mixed with normal temperature water supplied from the third branch passage (93) when passing through the mixing valve (86).
  • the flow rate of room temperature water flowing from the third branch passage (93) into the hot water supply passage (85) is the temperature of the hot water flowing out from the mixing valve (86) toward the water tap (87).
  • the temperature is adjusted to a predetermined hot water supply set temperature. And the hot water which became hot-water supply preset temperature is supplied with respect to a water tap (87).
  • the controller (55) receives the measured value (To) of the outlet temperature sensor (16) and the indoor set temperature (Ts). Then, the controller (55) selects one of the normal cooling operation, the cold storage heat operation, and the use cooling operation based on these input values, and causes the heat transfer circuit (30) to execute the selected operation. It is configured as follows.
  • a first determination value (T1c) and a second determination value (T2c) for selecting the operation of the heat transfer circuit (30) during the cooling operation are set in advance.
  • the first determination value (T1c) is a positive value
  • the second determination value (T2c) is a negative value.
  • the first determination value (T1c) and the second determination value (T2c) have the same absolute value.
  • the controller (55) determines the difference (To ⁇ Ts) between the measured value (To) of the outlet temperature sensor (16) and the indoor set temperature (Ts) as the first determination value (T1c) and the second determination value.
  • T2c determines the difference (To ⁇ Ts) between the measured value (To) of the outlet temperature sensor (16) and the indoor set temperature (Ts) as the first determination value (T1c) and the second determination value.
  • the controller (55) indicates that the measured value of the temperature of the heat source side heat transfer water at the outlet of the primary side passage (35a) of the use side heat exchanger (35) is within the reference range (T2c + Ts When it is determined that the value is within the range of T1c + Ts or less), the normal cooling operation is selected.
  • the controller (55) selects the normal cooling operation.
  • the controller (55) sets the first on-off valve (41) to the open state, and the second on-off valve (42), the third on-off valve (43), and the fourth on-off valve (44).
  • the heat transfer circuit (30) is caused to perform a normal cooling operation.
  • the controller (55) indicates that the measured value of the heat source side heat transfer water temperature at the outlet of the primary side passage (35a) of the use side heat exchanger (35) is the upper limit of the reference range.
  • the use cooling operation is selected.
  • the controller (55) selects the use cooling operation.
  • the controller opens the first on-off valve (41), the eighth on-off valve (48), and the tenth on-off valve (50), and opens the second on-off valve (42 ), The third on-off valve (43), the fourth on-off valve (44), the fifth on-off valve (45), the seventh on-off valve (47), and the ninth on-off valve (49) by setting them to the closed state.
  • the heat transfer circuit (30) is caused to perform a use cooling operation.
  • the controller (55) sets the discharge flow rate of the main pump (36) to a larger value than during the normal cooling operation.
  • the controller (55) selects the cold storage heat operation.
  • the controller (55) selects the regenerative heat operation
  • the controller (55) sets the first on-off valve (41), the seventh on-off valve (47), and the ninth on-off valve (49) to the open state, and the second on-off valve (42 ), The third on-off valve (43), the fourth on-off valve (44), the fifth on-off valve (45), the eighth on-off valve (48), and the tenth on-off valve (50) by setting them to the closed state.
  • the heat transfer circuit (30) is caused to perform a cold storage heat operation.
  • the controller (55) sets the discharge flow rate of the main pump (36) to the same value as during normal cooling operation.
  • the heat transfer circuit (30) selectively performs a normal heating operation, a heat storage heat operation, and a use heating operation. Further, the heat transfer circuit (30) performs a water heater operation and a hot water operation. The heat transfer circuit (30) during the heating operation performs the same operation as the heat storage heat operation as a water heater operation. In the heat transfer circuit (30), the water boiling operation and the hot water operation are performed independently. In other words, in this heat transfer circuit (30), both the kettle operation and the tapping operation may be performed simultaneously in parallel, or only one of the kettle operation and the tapping operation may be performed. There are cases where both the operation and the hot water operation are not executed. Further, in the heat transfer circuit (30), the hot water discharge operation can be executed during each of the normal heating operation, the heat storage heat operation, and the use heating operation.
  • the refrigerant circuit (21) performs a heating operation.
  • the refrigerant circuit (21) performs the heating operation regardless of the operation of the heat transfer circuit (30).
  • the indoor pump (76) is operated, and the utilization side heat transfer water circulates between the utilization side heat exchanger (35) and the indoor heat exchanger (75). . Specifically, the use side heat transfer water flowing into the secondary side passage (35b) of the use side heat exchanger (35) is heated by the heat source side heat transfer water flowing through the primary side passage (35a). The utilization side heat transfer water heated by the utilization side heat exchanger (35) flows into the supply side header (73) and is distributed to each indoor heat exchanger (75). In the indoor heat exchanger (75), the use-side heat transfer water dissipates heat, and the temperature of the use-side heat transfer water decreases.
  • each indoor heat exchanger (75) flows into the return header (74), joins it, and is sucked into the indoor pump (76), and then the usage-side heat exchanger ( It flows into the secondary passage (35b) of 35).
  • the four-way switching valve (27) is set to the second state (the state indicated by the solid line in the figure), and the first refrigerant on-off valve (29a ) Is set to the closed state, and the second refrigerant on-off valve (29b) is set to the open state. Further, during the heating operation of the refrigerant circuit (21), the outdoor fan (26) is operated.
  • a refrigeration cycle in which the heat source side heat exchanger (23) operates as a condenser and the outdoor heat exchanger (25) operates as an evaporator is performed.
  • the refrigerant discharged from the compressor (22) flows into the primary side passage (23a) of the heat source side heat exchanger (23) and dissipates heat to the heat source side heat transfer water in the secondary side passage (23b).
  • condense The refrigerant condensed in the heat source side heat exchanger (23) expands when passing through the expansion mechanism (24), and then absorbs heat from the outdoor air sent by the outdoor fan (26) in the outdoor heat exchanger (25). Evaporate.
  • the refrigerant evaporated in the outdoor heat exchanger (25) is sucked into the compressor (22) and compressed.
  • the heat source side heat transfer water flowing into the secondary side passage (23b) of the heat source side heat exchanger (23) is caused by the refrigerant flowing through the primary side passage (23a). Heated.
  • the heat source side heat transfer water heated by the heat source side heat exchanger (23) flows into the primary side passage (35a) of the use side heat exchanger (35) through the supply passage (31a).
  • the heat source side heat transfer water dissipates heat to the use side heat transfer water of the secondary side passage (35b), and the temperature of the heat source side heat transfer water decreases.
  • the heat-source-side heat transfer water radiated by the use-side heat exchanger (35) is sucked into the main pump (36) through the return passage (31b), and then the secondary-side passage of the heat source-side heat exchanger (23) (23b)
  • the heat generated by the refrigeration cycle in the refrigerant circuit (21) is given to the heat source side heat transfer water, and the heat given to the heat source side heat transfer water is further given to the use side heat transfer water. . And the warm heat given to utilization side heat transfer water is used for indoor heating.
  • the first on-off valve (41), the second on-off valve (42), and the fourth on-off valve (44) are set in the open state, and the third on-off valve (43)
  • the discharge flow rate of the main pump (36) is set to the same value as during normal heating operation.
  • the heat source side heat transfer water heated in the heat source side heat exchanger (23) is transferred to both the use side heat exchanger (35) and the heat storage tank (37). Supplied.
  • the heat source side heat transfer water flowing into the secondary side passage (23b) of the heat source side heat exchanger (23) is caused by the refrigerant flowing through the primary side passage (23a). Heated. Part of the heat source side heat transfer water heated by the heat source side heat exchanger (23) flows into the primary side passage (35a) through the supply passage (31a), The rest flows into the inlet passage (61). After the heat source side heat transfer water flowing into the primary side passage (35a) of the use side heat exchanger (35) dissipates heat to the use side heat transfer water of the secondary side passage (35b) as in normal heating operation. It flows into the return passage (31b).
  • the heat-source-side heat transfer water flowing into the inlet-side passage (61) flows into the upper end portion of the internal space of the heat storage tank (37) through the first branch passage (61a).
  • the low-temperature heat source side heat transfer water present at the bottom of the internal space is pushed out to the junction passage (63).
  • the amount of high-temperature heat source side heat transfer water increases. That is, the amount of heat stored in the heat storage tank (37) increases.
  • the flow rate of the heat source side heat transfer water flowing out from the heat storage tank (37) to the junction passage (63) becomes equal to the flow rate of the heat source side heat transfer water flowing into the heat storage tank (37) from the inlet side passage (61).
  • the heat-source-side heat transfer water flowing out from the heat storage tank (37) to the merge passage (63) joins the heat-source-side heat transfer water radiated by the use-side heat exchanger (35) and is sucked into the main pump (36). After that, it flows into the secondary passage (23b) of the heat source side heat exchanger (23).
  • the heat generated by the refrigeration cycle in the refrigerant circuit (21) is given to the heat source side heat transfer water.
  • a part of the heat given to the heat source side heat transfer water is given to the use side heat transfer water and used for indoor heating, and the rest is stored in the heat storage tank (37).
  • the heat transfer circuit (30) performs the same operation as the heat storage heat operation as a water heater operation.
  • the discharge flow rate of the main pump (36) is set to the same value as during the normal heating operation.
  • a part of the heat source side heat transfer water heated in the heat source side heat exchanger (23) is stored in the heat storage tank (37).
  • the first on-off valve (41), the third on-off valve (43), and the fifth on-off valve (45) are set to the open state, and the second on-off valve (42)
  • the discharge flow rate of the main pump (36) is set to a larger value than during normal heating operation.
  • the heat-source-side heat transfer water flowing into the secondary-side passage (23b) of the heat-source-side heat exchanger (23) is caused by the refrigerant flowing through the primary-side passage (23a). Heated.
  • the heat source side heat transfer water heated by the heat source side heat exchanger (23) flows into the primary side passage (35a) of the use side heat exchanger (35) through the supply passage (31a).
  • the heat source side heat transfer water is fed into the heat storage tank (37) from the junction passage (63) to the bottom of the internal space. For this reason, from the heat storage tank (37), the high-temperature heat source side heat transfer water present in the upper part of the internal space is pushed out to the hot water passage (64).
  • the amount of high temperature heat source side heat transfer water decreases. That is, the amount of heat stored in the heat storage tank (37) decreases.
  • the flow rate of the heat source side heat transfer water flowing out from the heat storage tank (37) to the hot water passage (64) is equal to the flow rate of the heat source side heat transfer water flowing into the heat storage tank (37) from the merge passage (63).
  • the heat source side heat transfer water flowing into the primary side passage (35a) of the use side heat exchanger (35) dissipates heat to the use side heat transfer water of the secondary side passage (35b) as in normal heating operation. It flows into the return passage (31b).
  • the heat source side heat transfer water flowing into the return passage (31b) is sucked into the main pump (36). Part of the heat source side heat transfer water discharged from the main pump (36) flows into the secondary side passage (23b) of the heat source side heat exchanger (23), and the rest passes through the junction passage (63).
  • the heat-source-side heat transfer water that has flowed into the secondary-side passage (23b) of the heat-source-side heat exchanger (23) is heated by the refrigerant in the primary-side passage (23a) as in the normal heating operation.
  • both the heat generated by the refrigeration cycle in the refrigerant circuit (21) and the heat stored in the heat storage tank (37) are applied to the use-side heat transfer water. And the warm heat given to utilization side heat transfer water is used for indoor heating.
  • the first water supply on / off valve (96) is set in the open state
  • the second water supply on / off valve (97) is set in the closed state.
  • the A portion of normal temperature water that has flowed from the water supply into the main passage (94) of the water supply passage (90) flows into the first branch passage (91), and the rest flows into the third branch passage (93).
  • the water that has flowed into the first branch passage (91) flows into the lower end of the internal space of the heat storage tank (37) through the merge passage (63). For this reason, high-temperature (for example, about 80 to 90 ° C.) heat source side heat transfer water present at the upper end of the internal space of the heat storage tank (37) is pushed out to the hot water passage (64).
  • high-temperature for example, about 80 to 90 ° C.
  • the high-temperature heat-source-side heat transfer water flowing into the hot water supply passage (64) flows into the hot water supply passage (85) as hot water for hot water supply and flows toward the water tap (87).
  • the hot water flowing through the hot water supply passage (85) is mixed with normal temperature water supplied from the third branch passage (93) when passing through the mixing valve (86).
  • the flow rate of room temperature water flowing from the third branch passage (93) into the hot water supply passage (85) is the temperature of the hot water flowing out from the mixing valve (86) toward the water tap (87).
  • the temperature is adjusted to a predetermined hot water supply set temperature. And the hot water which became hot-water supply preset temperature is supplied with respect to a water tap (87).
  • the controller (55) receives the measured value (To) of the outlet temperature sensor (16) and the indoor set temperature (Ts). Then, the controller (55) selects one of the normal heating operation, the heat storage heat operation, and the use heating operation based on these input values, and causes the heat transfer circuit (30) to execute the selected operation. It is configured as follows.
  • a first determination value (T1h) and a second determination value (T2h) for selecting the operation of the heat transfer circuit (30) are set in advance.
  • the first determination value (T1h) is a positive value
  • the second determination value (T2h) is a negative value.
  • the first determination value (T1h) and the second determination value (T2h) have the same absolute value.
  • the controller (55) determines the difference (To ⁇ Ts) between the measured value (To) of the outlet temperature sensor (16) and the indoor set temperature (Ts) as the first determination value (T1h) and the second determination value.
  • T2h one of the normal heating operation, the heat storage heat operation, and the use heating operation is selected based on the result.
  • the controller (55) indicates that the measured value of the temperature of the heat source side heat transfer water at the outlet of the primary side passage (35a) of the use side heat exchanger (35) is within the reference range (T2h + Ts When it is determined that the value is within the range of T1h + Ts or less, the normal heating operation is selected.
  • the controller (55) selects the normal heating operation.
  • the controller opens the first on-off valve (41), opens the second on-off valve (42), the third on-off valve (43), and the fourth on-off valve (44).
  • the heat transfer circuit (30) is caused to perform a normal heating operation.
  • the controller (55) means that the measured value of the temperature of the heat source side heat transfer water at the outlet of the primary side passage (35a) of the use side heat exchanger (35) is the upper limit of the reference range.
  • the heat storage heat operation is selected.
  • the controller (55) selects the heat storage heat operation.
  • the controller selects the heat storage heat operation
  • the controller sets the first on-off valve (41), the second on-off valve (42), and the fourth on-off valve (44) to the open state, and the third on-off valve (43 ), Fifth on-off valve (45), sixth on-off valve (46), seventh on-off valve (47), eighth on-off valve (48), ninth on-off valve (49), and tenth on-off valve (50) Is set to the closed state, thereby causing the heat transfer circuit (30) to execute the heat storage heat operation.
  • the controller (55) sets the discharge flow rate of the main pump (36) to the same value as during normal heating operation.
  • the controller (55) selects the use heating operation.
  • the controller (55) selects the use heating operation
  • the controller (55) sets the first on-off valve (41), the third on-off valve (43), and the fifth on-off valve (45) to the open state
  • the second on-off valve (42 ), Fourth on-off valve (44), sixth on-off valve (46), seventh on-off valve (47), eighth on-off valve (48), ninth on-off valve (49), and tenth on-off valve (50) Is set to the closed state, thereby causing the heat transfer circuit (30) to execute the use heating operation.
  • the controller (55) sets the discharge flow rate of the main pump (36) to a larger value than during normal heating operation.
  • the refrigerant circuit (21) performs an operation for cooling hot water supply.
  • the heat transfer circuit (30) the heat source side heat transfer water is cooled and condensed in the heat source side heat exchanger (23) operating as an evaporator.
  • the heat-source-side heat transfer water is heated in the heating heat exchanger (82) that operates as a heater.
  • the heat source side heat transfer water cooled in the heat source side heat exchanger (23) is sent to the lower part of the heat storage tank (37).
  • the heat source side heat transfer water cooled in the heat source side heat exchanger (23) (that is, the heat source side heat transfer water at a low temperature of around 5 ° C.) has a higher density than the heat source side heat transfer water at room temperature. Accumulate in the lower part of the tank (37).
  • the heat source side heat transfer water heated in the heat exchanger for heating (82) is sent to the upper part of the heat storage tank (37). It is.
  • the heat source side heat transfer water heated in the heat source side heat exchanger (23) (that is, the heat source side heat transfer water having a high temperature of about 80 to 90 ° C.) has a lower density than the heat source side heat transfer water at room temperature. , Accumulated in the upper part of the heat storage tank (37).
  • the low-temperature heat source side heat transfer water is stored in the lower part, and the high temperature heat source side heat transfer water is stored in the upper part. That is, both the cold heat and the warm heat are stored in the heat storage tank (37) of the present embodiment. Therefore, according to this embodiment, it is possible to store both cold and hot heat in one heat storage tank (37). As a result, there is no need to separately install a tank for storing cold heat and a tank for storing hot heat in the air conditioning system (10), and it is possible to store both cold and hot heat while maintaining the air conditioning system (10).
  • the configuration can be kept simple.
  • a water supply passage (90) is provided in the heat transfer circuit (30).
  • the high-temperature heat transfer water stored in the upper part of the heat storage tank (37) is supplied to the water tap (87) as hot water for hot water supply.
  • water is supplied to the heat storage tank (37) through the second branch passage (92) of the water supply passage (90).
  • path (90) introduce
  • the heat source side heat transfer water stored in the lower part of the heat storage tank (37) is converted into the heat source side heat exchanger. After being heated in (23), it is sent to the upper part of the heat storage tank (37). Therefore, according to the present embodiment, high-temperature heat transfer water can be stored in the entire internal space of the heat storage tank (37) during the heating operation in which it is not necessary to store the cold heat in the heat storage tank (37).
  • the amount of cold and heat obtained by the refrigeration cycle in the refrigerant circuit (21) is determined by the amount of refrigerant circulating in the refrigerant circuit (21).
  • the coefficient of performance (COP) of the refrigeration cycle also changes accordingly. The reason is that the performance of the heat exchanger changes when the flow rate of the refrigerant passing through the heat exchanger changes, or the efficiency of the compressor changes when the rotation speed of the compressor changes.
  • the fluctuation range of the circulation amount of the refrigerant in the refrigerant circuit (21) becomes large.
  • the heating capacity is adjusted only by changing the amount of heat obtained by the refrigeration cycle
  • the fluctuation range of the refrigerant circulation amount in the refrigerant circuit (21) becomes large.
  • the amount of refrigerant circulating in the refrigerant circuit (21) (specifically, the rotational speed of the compressor (22)) must be set to a value that does not provide a high coefficient of performance, and the outdoor The operation efficiency of the unit (15) might be reduced.
  • the heat transfer circuit (30) is configured to selectively perform the normal cooling operation, the cold storage heat operation, and the use cooling operation.
  • normal cooling operation is performed.
  • cold storage heat operation is performed. If the amount is too small for the cooling load, the cooling operation obtained by the indoor heat exchanger (75) can be achieved even if the amount of cooling heat obtained by the refrigerant circuit (21) cannot be actively adjusted by performing the respective cooling operations.
  • the capacity can be adjusted according to the cooling load.
  • the heat transfer circuit (30) is configured to selectively perform the normal heating operation, the heat storage heat operation, and the use heating operation.
  • normal heating operation is performed.
  • heat storage heat operation is performed. If the amount is too small relative to the heating load, the heating operation obtained by the indoor heat exchanger (75) can be achieved even if the amount of heat obtained by the refrigerant circuit (21) cannot be actively adjusted by performing the heating operation.
  • the capacity can be adjusted according to the heating load.
  • the air conditioning capacity obtained by the indoor heat exchanger (75) can be reduced by the cooling load or the heating even though the rotational speed of the compressor (22) of the refrigerant circuit (21) is fixed. It can be adjusted according to the load. Therefore, according to the present embodiment, the cooling capacity and heating capacity in the indoor heat exchanger (75) can be adjusted, and the rotation speed of the compressor (22) can be maintained at a value that provides a high coefficient of performance. It is possible to improve the operating efficiency of the outdoor unit (15).
  • the refrigerant circuit (21) may be configured to perform a refrigeration cycle (so-called supercritical cycle) in which the high pressure is set to a value higher than the critical pressure of the refrigerant. In that case, it is desirable to fill the refrigerant circuit (21) with carbon dioxide as a refrigerant instead of the so-called chlorofluorocarbon refrigerant.
  • the heat exchanger (82) for heating is used during the cooling hot water supply operation
  • the outdoor heat exchanger (25) is used during the cooling only operation
  • the heat source side is used during the heating operation.
  • Each heat exchanger (23) operates as a gas cooler.
  • the indoor side circuit (70) is a closed circuit in which the use side heat transfer water circulating inside does not come into contact with the atmosphere, but the indoor side circuit (70) is used on the use side circulating inside.
  • the heat transfer water may be an open circuit in contact with the atmosphere.
  • the indoor side circuit (70) configured as an open circuit is connected to an open tank in which the water surface inside is in contact with the atmosphere, instead of the expansion container (78) in the form of a sealed container.
  • the present invention is useful for a heat source device provided in an air conditioning system.
  • Air conditioning system 21 Refrigerant circuit 23 Heat source side heat exchanger 25 Outdoor heat exchanger 30 Heat transfer circuit 35 User side heat exchanger 37 Heat storage tank (water storage tank) 82 Heat exchanger for heating 90 Water supply passage

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention porte sur un système de climatisation (10) dans lequel une unité extérieure (15) est reliée à un circuit côté intérieur (70) dans lequel de l'eau de chauffage sur le côté usage est en circulation. Un circuit de refroidissement (21) est disposé dans l'unité extérieure (15). Lorsque le système de climatisation (10) fonctionne en mode de refroidissement, un cycle de refroidissement est effectué, dans lequel un échangeur de chaleur de chauffage (82) sert de condenseur, et un échangeur de chaleur (23) sur le côté source de chaleur sert d'évaporateur dans le circuit de refroidissement (21). L'eau de chauffage qui est chauffée par l'échangeur de chaleur de chauffage (82) est conduite jusqu'à l'extrémité supérieure d'un réservoir de stockage thermique (37), tandis qu'une partie de l'eau de chauffage refroidie par l'échangeur de chaleur (23) sur le côté source de chaleur est conduite jusqu'à l'extrémité inférieure du réservoir de stockage thermique (37). De l'eau de chauffage à température élevée est stockée dans la section proche de l'extrémité supérieure de l'espace à l'intérieur du réservoir de stockage thermique (37), et de l'eau de chauffage basse température est stockée dans la section proche de l'extrémité inférieure de l'espace à l'intérieur du réservoir de stockage thermique (37).
PCT/JP2009/002125 2008-05-21 2009-05-14 Système de climatisation WO2009141979A1 (fr)

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JP2008133244A JP5233405B2 (ja) 2008-05-21 2008-05-21 空調システム

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WO2023149879A1 (fr) * 2022-02-03 2023-08-10 Vilter Manufacturing Llc Système et procédé de chauffage ou de refroidissement utilisant une pompe à chaleur
WO2023149878A1 (fr) * 2022-02-03 2023-08-10 Vilter Manufacturing Llc Système et procédé de chauffage ou de refroidissement utilisant une pompe à chaleur

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CN101788172B (zh) * 2009-01-22 2012-07-25 珠海格力电器股份有限公司 一种蓄能空调机组及其工作方法
JP5333557B2 (ja) * 2011-09-30 2013-11-06 ダイキン工業株式会社 給湯空調システム
JP5327308B2 (ja) * 2011-09-30 2013-10-30 ダイキン工業株式会社 給湯空調システム
KR101236597B1 (ko) 2011-09-30 2013-02-22 한밭대학교 산학협력단 다용도 공기조화시스템
CN103629735A (zh) * 2012-08-29 2014-03-12 昆山开思拓节能技术有限公司 一种全自动中央热泵热水装置
IT201700123450A1 (it) * 2017-10-30 2019-04-30 Frigel Firenze S P A Sistema termodinamico di bilanciamento di carichi termici in impianti e processi industriali e relativo metodo
KR102018218B1 (ko) * 2018-10-12 2019-09-04 김경환 고층건물의 공조 및 용수공급 시스템

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JP2004257586A (ja) * 2003-02-24 2004-09-16 Matsushita Electric Ind Co Ltd 二酸化炭素を冷媒として用いた冷凍装置

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JPH09126500A (ja) * 1995-10-30 1997-05-16 Mitsubishi Heavy Ind Ltd 蓄熱式空気調和機
JP2004257586A (ja) * 2003-02-24 2004-09-16 Matsushita Electric Ind Co Ltd 二酸化炭素を冷媒として用いた冷凍装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023149879A1 (fr) * 2022-02-03 2023-08-10 Vilter Manufacturing Llc Système et procédé de chauffage ou de refroidissement utilisant une pompe à chaleur
WO2023149878A1 (fr) * 2022-02-03 2023-08-10 Vilter Manufacturing Llc Système et procédé de chauffage ou de refroidissement utilisant une pompe à chaleur

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