EP3358273B1 - Équipement d'utilisation de pompe à chaleur - Google Patents

Équipement d'utilisation de pompe à chaleur Download PDF

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Publication number
EP3358273B1
EP3358273B1 EP16906499.5A EP16906499A EP3358273B1 EP 3358273 B1 EP3358273 B1 EP 3358273B1 EP 16906499 A EP16906499 A EP 16906499A EP 3358273 B1 EP3358273 B1 EP 3358273B1
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EP
European Patent Office
Prior art keywords
refrigerant
heat exchanger
circuit
water
main passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP16906499.5A
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German (de)
English (en)
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EP3358273A1 (fr
EP3358273A4 (fr
Inventor
Yasuhiro Suzuki
Kazutaka Suzuki
Hirokazu Minamisako
Taro Hattori
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication of EP3358273A1 publication Critical patent/EP3358273A1/fr
Publication of EP3358273A4 publication Critical patent/EP3358273A4/fr
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Classifications

    • 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
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/16—Arrangements for water drainage 
    • F24H9/17—Means for retaining water leaked from heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021—Storage heaters
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks

Definitions

  • the present invention relates to a heat pump use apparatus including a refrigerant circuit and a heat medium circuit.
  • Patent Literature 1 there is described an outdoor unit for a heat pump cycle apparatus using flammable refrigerant.
  • the outdoor unit includes a refrigerant circuit including a compressor, an air heat exchanger, an expansion device, and a water heat exchanger, which are connected to one another through pipes, and a pressure relief valve configured to prevent excessive rise of water pressure in a water circuit configured to supply water heated in the water heat exchanger.
  • a load unit including a water circuit chamber configured to accommodate at least a part of a water circuit configured to allow water to flow therethrough, a fan, an air inlet formed at a height positioned different from that of the air inlet and configured to suck indoor air therethrough, an air outlet configured to blow indoors the air sucked through the air inlet, and an air passage formed between the air inlet and the air outlet so as to be isolated from the water circuit chamber.
  • a load-side heat exchanger is provided in the air passage.
  • Document WO 2016/047278 A1 discloses a heat pump use apparatus according to the preamble of claim 1.
  • Patent Literature 1 Japanese Unexamined Patent Application Publication No. 2013-167398
  • a pressure relief valve of the water circuit is provided in an indoor unit.
  • the outdoor unit and the indoor unit in the heat pump use apparatus There are various combinations of the outdoor unit and the indoor unit in the heat pump use apparatus. An outdoor unit and an indoor unit, which are manufactured by the same manufacturer, may be combined. Further, an outdoor unit and an indoor unit, which are manufactured by different manufacturers, may be combined. Therefore, the outdoor unit described in Patent Literature 1 may be combined with the indoor unit including the pressure relief valve.
  • Patent Literature 1 when the refrigerant is leaked to the water circuit, the refrigerant mixed into water inside the water circuit may be discharged not only through the pressure relief valve provided in the outdoor unit, but also through the pressure relief valve provided in the indoor unit. Therefore, there is a problem in that the refrigerant may be leaked to a room through the water circuit.
  • the present invention has been made to solve the problem described above, and has an object to provide a heat pump use apparatus capable of preventing leakage of refrigerant to a room.
  • a heat pump use apparatus includes: a refrigerant circuit configured to circulate refrigerant; a heat medium circuit configured to allow a heat medium to flow therethrough; and a heat exchanger configured to exchange heat between the refrigerant and the heat medium.
  • the heat medium circuit includes a main passage extending through the heat exchanger.
  • the main passage includes: a branching portion to which a plurality of branch passages branched from the main passage are connected, the branching portion being provided at a downstream end of the main passage; and a joining portion at which the plurality of branch passages are connected to each other to be joined to the main passage, the joining portion being provided at an upstream end of the main passage.
  • the heat pump use apparatus further includes a pressure protection device and a refrigerant leakage detection device that are connected to the main passage.
  • the pressure protection device is connected to the main passage at a connecting portion located between the heat exchanger and one of the branching portion and the joining portion.
  • the main passage includes a first interruption device configured to be able to interrupt a flow from the heat exchanger to the connecting portion.
  • the first interruption device is provided between the heat exchanger and the connecting portion.
  • the main passage includes a second interruption device configured to be able to interrupt a flow from the heat exchanger to an other of the branching portion and the joining portion.
  • the second interruption device is provided between the heat exchanger and the other of the branching portion and the joining portion.
  • a flow of the refrigerant mixed into the heat medium can be interrupted by the interruption device. Therefore, the leakage of the refrigerant from the pressure protection device to the room can be prevented.
  • FIG. 1 is a circuit diagram for illustrating a schematic configuration of the heat pump use apparatus according to Embodiment 1.
  • a heat pump water heater 1000 is exemplified as the heat pump use apparatus.
  • a dimensional relationship of components and a shape of each of the components may be different from those of actual components.
  • the heat pump water heater 1000 includes a refrigerant circuit 110 configured to circulate refrigerant and a water circuit 210 configured to allow water to flow therethrough. Further, the heat pump water heater 1000 includes an outdoor unit 100 installed outside, for example, outdoor space, and an indoor unit 200 installed indoor space. The indoor unit 200 is installed, for example, in a kitchen, a bathroom, or a laundry room, or, further, in a storage space such as a closet inside a building.
  • the refrigerant circuit 110 includes a compressor 3, a refrigerant flow switching device 4, a load-side heat exchanger 2, a first pressure reducing device 6, an intermediate pressure receiver 5, a second pressure reducing device 7, and a heat source-side heat exchanger 1, which are annularly connected in order through refrigerant pipes.
  • the heat pump water heater 1000 is capable of a normal operation, for example, heater water heating operation, for heating water flowing through the water circuit 210 and a defrosting operation for circulating the refrigerant reversely to the normal operation to defrost the heat source-side heat exchanger 1.
  • the compressor 3 is a fluid machine configured to compress sucked low-pressure refrigerant and to discharge the low-pressure refrigerant as high-pressure refrigerant.
  • the compressor 3 of Embodiment 1 includes an inverter device, and is configured to change a driving frequency freely selectively, to thereby be able to change a capacity, that is, an amount of the refrigerant to be sent per unit time.
  • the refrigerant flow switching device 4 is configured to switch a flow direction of the refrigerant inside the refrigerant circuit 110 between the normal operation and the defrosting operation.
  • a four-way valve is used as the refrigerant flow switching device 4.
  • the load-side heat exchanger 2 is a water-refrigerant heat exchanger configured to exchange heat between the refrigerant flowing through the refrigerant circuit 110 and the water flowing through the water circuit 210.
  • a plate heat exchanger is used as the load-side heat exchanger 2 as the load-side heat exchanger 2.
  • the load-side heat exchanger 2 includes a refrigerant flow passage for allowing refrigerant to flow therethrough as a part of the refrigerant circuit 110, a water flow passage for allowing water to flow therethrough as a part of the water circuit 210, and a thin plate-like partition wall configured to partition the refrigerant flow passage and the water flow passage.
  • the load-side heat exchanger 2 functions as a condenser (radiator) configured to heat water during the normal operation, and functions as an evaporator (heat absorber) during the defrosting operation.
  • the first pressure reducing device 6 is configured to regulate a flow rate of refrigerant, for example, regulate a pressure of the refrigerant flowing into the load-side heat exchanger 2.
  • the intermediate pressure receiver 5 is located between the first pressure reducing device 6 and the second pressure reducing device 7 in the refrigerant circuit 110, and is configured to accumulate an excess of the refrigerant.
  • a suction pipe 11 connected to a suction side of the compressor 3 passes through the inside of the intermediate pressure receiver 5.
  • heat is exchanged between the refrigerant passing through the suction pipe 11 and the refrigerant inside the intermediate pressure receiver 5. Therefore, the intermediate pressure receiver 5 has a function as an internal heat exchanger for the refrigerant circuit 110.
  • the second pressure reducing device 7 is configured to regulate the pressure of the refrigerant by regulating the flow rate of the refrigerant.
  • the first pressure reducing device 6 and the second pressure reducing device 7 of Embodiment 1 are each an electronic expansion valve capable of changing an opening degree based on an instruction from a controller 101 described later.
  • the heat source-side heat exchanger 1 is an air-refrigerant heat exchanger configured to exchange heat between the refrigerant flowing through the refrigerant circuit 110 and outdoor air sent by an outdoor air-sending fan or other devices (not shown).
  • the heat source-side heat exchanger 1 functions as an evaporator (heat absorber) during the normal operation, and functions as a condenser (radiator) during the defrosting operation.
  • refrigerants used as the refrigerants to be circulated through the refrigerant circuit 110 include a slightly flammable refrigerant such as R1234yf or R1234ze(E) and a strongly flammable refrigerant such as R290 or R1270.
  • Those refrigerants may be each used as a single refrigerant, or may be used as a mixed refrigerant obtained by mixing two or more kinds of the refrigerants with each other.
  • the refrigerant having flammability equal to or higher than a slightly flammable level (for example, 2L or higher in category of ASHRAE34) may be referred to as "refrigerant having flammability" or "flammable refrigerant”.
  • a nonflammable refrigerant such as R407C or R410A having nonflammability (for example, 1 in the category of ASHRAE34) can be used.
  • Those refrigerants have a density larger than that of air under an atmospheric pressure (for example, with a temperature being a room temperature (25 degrees Celsius)).
  • a refrigerant having toxicity such as R717 (ammonia) may also be used.
  • the outdoor unit 100 accommodates the refrigerant circuit 110 including the compressor 3, the refrigerant flow switching device 4, the load-side heat exchanger 2, the first pressure reducing device 6, the intermediate pressure receiver 5, the second pressure reducing device 7, and the heat source-side heat exchanger 1.
  • the outdoor unit 100 includes the controller 101 configured to mainly control an operation of the refrigerant circuit 110, for example, the compressor 3, the refrigerant flow switching device 4, the first pressure reducing device 6, the second pressure reducing device 7, and the outdoor air-sending fan (not shown).
  • the controller 101 includes a microcomputer including a CPU, a ROM, a RAM, and an I/O port.
  • the controller 101 can communicate with a controller 201 and an operation unit 202, which are described later, through a control line 102.
  • the flow direction of the refrigerant in the refrigerant circuit 110 during the normal operation is indicated by solid arrows.
  • the refrigerant circuit 110 is configured so that, during the normal operation, the refrigerant flow passage is switched by the refrigerant flow switching device 4 as indicated by the solid arrows to cause the high-temperature and high-pressure refrigerant to flow into the load-side heat exchanger 2.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 3 passes through the refrigerant flow switching device 4, and flows into the refrigerant flow passage of the load-side heat exchanger 2.
  • the load-side heat exchanger 2 functions as a condenser. That is, in the load-side heat exchanger 2, heat is exchanged between the refrigerant flowing through the refrigerant flow passage and the water flowing through the water flow passage of the load-side heat exchanger 2, and the heat of condensation of the refrigerant is transferred to the water. With this operation, the refrigerant flowing through the refrigerant flow passage of the load-side heat exchanger 2 is condensed to become a high-pressure liquid refrigerant. Further, the water flowing through the water flow passage of the load-side heat exchanger 2 is heated by transfer heat from the refrigerant.
  • the high-pressure liquid refrigerant condensed by the load-side heat exchanger 2 flows into the first pressure reducing device 6, and has the pressure reduced slightly to become a two-phase refrigerant.
  • the two-phase refrigerant flows into the intermediate pressure receiver 5, and is cooled by the heat exchange with a low-pressure gas refrigerant flowing through the suction pipe 11 to become a liquid refrigerant.
  • the liquid refrigerant flows into the second pressure reducing device 7, and has the pressure reduced to become a low-pressure two-phase refrigerant.
  • the low-pressure two-phase refrigerant flows into the heat source-side heat exchanger 1. During the normal operation, the heat source-side heat exchanger 1 functions as an evaporator.
  • the heat source-side heat exchanger 1 heat is exchanged between the refrigerant circulated through the inside and the outdoor air sent by the outdoor air-sending fan, and the heat of evaporation of the refrigerant is received from the outdoor air.
  • the refrigerant that has flowed into the heat source-side heat exchanger 1 evaporates to become the low-pressure gas refrigerant.
  • the low-pressure gas refrigerant passes through the refrigerant flow switching device 4, and flows into the suction pipe 11.
  • the low-pressure gas refrigerant that has flowed into the suction pipe 11 is heated by the heat exchange with the refrigerant inside the intermediate pressure receiver 5, and is sucked by the compressor 3.
  • the refrigerant sucked by the compressor 3 is compressed to become the high-temperature and high-pressure gas refrigerant. In the normal operation, the above-mentioned cycle is repeated.
  • Fig. 1 the flow direction of the refrigerant in the refrigerant circuit 110 during the defrosting operation is indicated by the broken arrows.
  • the refrigerant circuit 110 is configured so that, during the defrosting operation, the refrigerant flow passage is switched by the refrigerant flow switching device 4 as indicated by the broken arrows to cause the high-temperature and high-pressure refrigerant to flow into the heat source-side heat exchanger 1.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 3 passes through the refrigerant flow switching device 4, and flows into the heat source-side heat exchanger 1.
  • the heat source-side heat exchanger 1 functions as a condenser. That is, in the heat source-side heat exchanger 1, the heat of condensation of the refrigerant circulated through the inside is transferred to frost adhering to a surface of the heat source-side heat exchanger 1. With this operation, the refrigerant circulated through the inside of the heat source-side heat exchanger 1 is condensed to become the high-pressure liquid refrigerant. Further, the frost adhering to the surface of the heat source-side heat exchanger 1 is melted by transfer heat from the refrigerant.
  • the high-pressure liquid refrigerant condensed by the heat source-side heat exchanger 1 passes through the second pressure reducing device 7, the intermediate pressure receiver 5, and the first pressure reducing device 6 to become the low-pressure two-phase refrigerant, and flows into the refrigerant flow passage of the load-side heat exchanger 2.
  • the load-side heat exchanger 2 functions as an evaporator during the defrosting operation. That is, in the load-side heat exchanger 2, heat is exchanged between the refrigerant flowing through the refrigerant flow passage and the water flowing through the water flow passage, and heat of evaporation of the refrigerant is received from the water.
  • the refrigerant flowing through the refrigerant flow passage of the load-side heat exchanger 2 evaporates to become the low-pressure gas refrigerant.
  • the gas refrigerant passes through the refrigerant flow switching device 4 and the suction pipe 11, and is sucked by the compressor 3.
  • the refrigerant sucked by the compressor 3 is compressed to become the high-temperature and high-pressure gas refrigerant.
  • the above-mentioned cycle is continuously repeated.
  • the water circuit 210 of Embodiment 1 is a closed circuit configured to circulate water.
  • the water circuit 210 is constructed by a water circuit on the outdoor unit 100 side and a water circuit on the indoor unit 200 side, which are connected to each other.
  • the water circuit 210 includes a main passage 220, a branch passage 221 constructing a hot water circuit, and a branch passage 222 constructing a part of a heater circuit.
  • the main passage 220 constructs a part of the closed circuit.
  • the branch passages 221 and 222 are each connected to the main passage 220 so as to be branched from the main passage 220.
  • the branch passages 221 and 222 are provided in parallel to each other.
  • the branch passage 221 constructs the closed circuit together with the main passage 220.
  • the branch passage 222 constructs the closed circuit together with the main passage 220, a heater 300 connected to the branch passage 222, and other units.
  • the heater 300 is provided indoor space separately from the indoor unit 200.
  • a radiator or a floor heater is used, for example.
  • Embodiment 1 water is taken as an example of a heat medium circulated through the water circuit 210.
  • the heat medium other liquid heat media such as brine may be used.
  • the main passage 220 includes a strainer 56, a flow switch 57, the load-side heat exchanger 2, a booster heater 54, and a pump 53, which are connected to one another through water pipes.
  • a drain outlet 62 configured to drain water inside the water circuit 210 is formed in a halfway part of the water pipes that construct the water circuit 210.
  • a downstream end of the main passage 220 is connected to an inflow port of a three-way valve 55 (example of a branching portion) having one inflow port and two outflow ports.
  • the branch passages 221 and 222 are branched from the main passage 220.
  • An upstream end of the main passage 220 is connected to a joining portion 230.
  • the branch passages 221 and 222 are joined to the main passage 220.
  • the water circuit 210 extending from the joining portion 230 to the three-way valve 55 through the load-side heat exchanger 2 and other units corresponds to the main passage 220.
  • the load-side heat exchanger 2 of the main passage 220 is provided in the outdoor unit 100.
  • units other than the load-side heat exchanger 2 are provided in the indoor unit 200. That is, the main passage 220 of the water circuit 210 is provided across the outdoor unit 100 and the indoor unit 200. A part of the main passage 220 is provided in the outdoor unit 100, and an other part of the main passage 220 is provided in the indoor unit 200.
  • the outdoor unit 100 and the indoor unit 200 are connected to each other through two connecting pipes 211 and 212 constructing parts of the main passage 220.
  • the pump 53 is a device configured to apply pressure to the water inside the water circuit 210 to circulate the water through the inside of the water circuit 210.
  • the booster heater 54 is a device configured to further heat the water inside the water circuit 210 when, for example, the outdoor unit 100 has insufficient heating capacity.
  • the three-way valve 55 is a device configured to switch a flow of the water inside the water circuit 210. For example, the three-way valve 55 switches a destination to which the water inside the main passage 220 is to be circulated between the branch passage 221 side and the branch passage 222 side.
  • the strainer 56 is a device configured to remove scale inside the water circuit 210.
  • the flow switch 57 is a device configured to detect whether or not the flow rate of the water circulated through the inside of the water circuit 210 is equal to or larger than a fixed amount. A flow rate sensor may also be used instead of the flow switch 57.
  • a pressure relief valve 70 (example of a pressure protection device) is connected to the booster heater 54. That is, the booster heater 54 serves as a connecting portion for the pressure relief valve 70 (example of the pressure protection device).
  • the connecting portion for the pressure relief valve 70 may be simply expressed as the "connecting portion”.
  • the pressure relief valve 70 is a protection device configured to prevent excessive rise of the pressure in the water circuit 210, which is caused by temperature change of water.
  • the pressure relief valve 70 is configured to release water to the outside of the water circuit 210 based on pressure in the water circuit 210.
  • the pressure relief valve 70 is opened, and the water inside the water circuit 210 is released to the outside through the pressure relief valve 70.
  • the pressure relief valve 70 is provided in the indoor unit 200.
  • the pressure relief valve 70 is provided in the indoor unit 200 so as to protect the pressure in the water circuit 210 in the indoor unit 200.
  • a pipe 72 which is a water flow passage branched from the main passage 220, is connected to a casing of the booster heater 54.
  • the pressure relief valve 70 is mounted to an other end of the pipe 72. That is, the pressure relief valve 70 is connected to the booster heater 54 through the pipe 72.
  • the booster heater 54 serves as the connecting portion for connecting the pressure relief valve 70 to the main passage 220. In the main passage 220, a water temperature becomes the highest in the booster heater 54. Therefore, the booster heater 54 is optimum as the connecting portion for connecting the pressure relief valve 70. Further, when the pressure relief valve 70 is connected to the branch passages 221 and 222, the pressure relief valve 70 needs to be provided for each of the branch passages 221 and 222. In Embodiment 1, the pressure relief valve 70 is connected to the main passage 220. Therefore, it is only necessary to provide one pressure relief valve 70.
  • a branching portion 72a is provided on a halfway part of the pipe 72.
  • One end of a pipe 75 is connected to the branching portion 72a.
  • the expansion tank 52 is connected to an other end of the pipe 75. That is, the expansion tank 52 is connected to the booster heater 54 through the pipes 75 and 72.
  • the expansion tank 52 is a device configured to control the pressure change inside the water circuit 210, which is caused by temperature change of water, within a predetermined range.
  • An interruption device 77 is provided downstream of the load-side heat exchanger 2 as a first interruption device.
  • the interruption device 77 is provided in the main passage 220 at a portion between the load-side heat exchanger 2 and the booster heater 54, that is, the connecting portion for connecting the pressure relief valve 70.
  • an on-off valve such as a solenoid valve, a flow control valve, or an electronic expansion valve.
  • the interruption device 77 is in a closed state during the normal operation. When the interruption device 77 is in the closed state, the interruption device 77 interrupts a flow from the load-side heat exchanger 2 toward the booster heater 54.
  • the interruption device 77 is controlled by the controller 201 described later.
  • the interruption device 77 is provided as a second interruption device in the main passage 220 at a portion between the load-side heat exchanger 2 and the three-way valve 55 (branching portion).
  • An interruption device 78 is provided upstream of the load-side heat exchanger 2 as the second interruption device.
  • the interruption device 78 is provided in the main passage 220 at a portion between the load-side heat exchanger 2 and the joining portion 230.
  • a check valve configured to allow a flow of water from the joining portion 230 to the load-side heat exchanger 2, and to interrupt a flow from the load-side heat exchanger 2 to the joining portion 230.
  • an on-off valve such as a solenoid valve, a flow control valve, or an electronic expansion valve.
  • the interruption device 78 When the on-off valve is used as the interruption device 78, the interruption device 78 is controlled by the controller 201 described later, or is operated in association with the interruption device 77.
  • the connecting portion for connecting the pressure relief valve 70 is provided between the load-side heat exchanger 2 and the joining portion 230, the interruption device 78 is provided as the first interruption device in the main passage 220 at a portion between the load-side heat exchanger 2 and the connecting portion.
  • a refrigerant leakage detection device 98 is provided downstream of the interruption device 77.
  • the refrigerant leakage detection device 98 is connected to the main passage 220 at a portion between the interruption device 77 and the booster heater 54 (connecting portion).
  • the refrigerant leakage detection device 98 is a device configured to detect leakage of refrigerant from the refrigerant circuit 110 to the water circuit 210. When the refrigerant is leaked from the refrigerant circuit 110 to the water circuit 210, the pressure in the water circuit 210 rises.
  • the refrigerant leakage detection device 98 is capable of detecting the leakage of the refrigerant into the water circuit 210 based on the pressure in the water circuit 210, that is, a value of the pressure or temporal change of the pressure.
  • a pressure sensor or a pressure switch configured to detect the pressure in the water circuit 210 is used.
  • the pressure switch may be an electric pressure switch or a mechanical pressure switch using a diaphragm.
  • the refrigerant leakage detection device 98 is configured to output a detection signal to the controller 201.
  • both of the interruption devices 77 and 78 and the refrigerant leakage detection device 98 are provided in the indoor unit 200.
  • each of the interruption devices 77 and 78 and the refrigerant leakage detection device 98 can be connected to the controller 201 through a control line in the indoor unit 200.
  • All of the interruption devices 77 and 78 and the refrigerant leakage detection device 98 may be provided in the outdoor unit 100.
  • each of the interruption devices 77 and 78 and the refrigerant leakage detection device 98 can be connected to the controller 101 through a control line in the outdoor unit 100. Thus, costs can be reduced.
  • the branch passage 221 constructing the hot water circuit is provided in the indoor unit 200.
  • An upstream end of the branch passage 221 is connected to one outflow port of the three-way valve 55.
  • a downstream end of the branch passage 221 is connected to the joining portion 230.
  • a coil 61 is provided in the branch passage 221.
  • the coil 61 is built in a hot-water storage tank 51 configured to store water therein.
  • the coil 61 is a heating unit configured to heat the water accumulated in the hot-water storage tank 51 through heat exchange with water (hot water) circulated through the branch passage 221 of the water circuit 210.
  • the hot-water storage tank 51 includes an immersion heater 60 built therein.
  • the immersion heater 60 is a heating unit configured to further heat the water accumulated in the hot-water storage tank 51.
  • a sanitary circuit-side pipe 81a (for example, a hot water pipe), which is to be connected to, for example, a shower, is connected to an upper portion inside the hot-water storage tank 51.
  • a sanitary circuit-side pipe 81b (for example, a makeup water pipe) is connected to a lower portion inside the hot-water storage tank 51.
  • a drain outlet 63 configured to drain water in the hot-water storage tank 51 is formed in a lower portion of the hot-water storage tank 51.
  • the hot-water storage tank 51 is covered with a heat insulating material (not shown). Examples of the heat insulating material to be used include felt, Thinsulate (trademark), and a vacuum insulation panel (VIP).
  • the branch passage 222 constructing the part of the heater circuit is provided in the indoor unit 200.
  • the branch passage 222 includes a supply pipe 222a and a return pipe 222b.
  • An upstream end of the supply pipe 222a is connected to the other outflow port of the three-way valve 55.
  • a downstream end of the supply pipe 222a and an upstream end of the return pipe 222b are connected to heater circuit-side pipes 82a and 82b, respectively.
  • a downstream end of the return pipe 222b is connected to the joining portion 230.
  • the supply pipe 222a and the return pipe 222b are connected to the heater 300 through the heater circuit-side pipes 82a and 82b, respectively.
  • the heater circuit-side pipes 82a and 82b and the heater 300 are provided indoor space but outside the indoor unit 200.
  • the branch passage 222 constructs the heater circuit together with the heater circuit-side pipes 82a and 82b and the heater 300.
  • a pressure relief valve 301 is connected to the heater circuit-side pipe 82a.
  • the pressure relief valve 301 is a protection device configured to prevent excessive rise of the pressure in the water circuit 210, and, for example, has the structure similar to that of the pressure relief valve 70. For example, when the pressure in the heater circuit-side pipe 82a is increased to exceed set pressure, the pressure relief valve 301 is opened, and water in the heater circuit-side pipe 82a is released to the outside through the pressure relief valve 301.
  • the pressure relief valve 301 is provided indoor space but outside the indoor unit 200.
  • the heater 300, the heater circuit-side pipes 82a and 82b, and the pressure relief valve 301 in Embodiment 1 are not parts of the heat pump water heater 1000, but units installed by an on-site installation worker depending on circumstances of each building.
  • the heat source device may be replaced by the heat pump water heater 1000.
  • the heater 300, the heater circuit-side pipes 82a and 82b, and the pressure relief valve 301 are used as they are. Therefore, it is desired that the heat pump water heater 1000 be able to be connected to various facilities irrespective of presence or absence of the pressure relief valve 301.
  • the indoor unit 200 includes the controller 201 configured to mainly control an operation of the water circuit 210, for example, the pump 53, the booster heater 54, the three-way valve 55, and the interruption device 77.
  • the controller 201 includes a microcomputer including a CPU, a ROM, a RAM, and an I/O port.
  • the controller 201 can communicate with the controller 101 and the operation unit 202.
  • the controller 201 sets the interruption device 77 to the closed state when the controller 201 detects the leakage of the refrigerant into the water circuit 210 based on the detection signal from the refrigerant leakage detection device 98.
  • the refrigerant leakage detection device 98 When the refrigerant leakage detection device 98 is configured to output a contact signal at the time of the leakage of the refrigerant, the refrigerant leakage detection device 98 may be directly connected to the interruption device 77 without connection through the controller 201.
  • the operation unit 202 allows a user to conduct the operation or various settings of the heat pump water heater 1000.
  • the operation unit 202 of Embodiment 1 includes a display unit 203.
  • the display unit 203 can display various kinds of information including a state of the heat pump water heater 1000.
  • the operation unit 202 is provided, for example, on a surface of the casing of the indoor unit 200.
  • the load-side heat exchanger 2 functions as an evaporator during the defrosting operation. Therefore, the partition wall of the load-side heat exchanger 2 may be broken due to freezing of water or other causes particularly during the defrosting operation.
  • the pressure of the refrigerant flowing through the refrigerant flow passage of the load-side heat exchanger 2 is higher than the pressure of the water flowing through the water flow passage of the load-side heat exchanger 2 both during the normal operation and during the defrosting operation.
  • the refrigerant in the refrigerant flow passage flows out to the water flow passage both during the normal operation and during the defrosting operation, and the refrigerant is mixed into the water inside the water flow passage.
  • the refrigerant mixed into the water is gasified due to pressure decrease.
  • the refrigerant having the pressure higher than that of the water is mixed into the water, with the result that the pressure in the water circuit 210 is increased.
  • the refrigerant mixed into the water inside the water circuit 210 in the load-side heat exchanger 2 not only flows in a direction along a flow of water at a normal time, that is, a direction from the load-side heat exchanger 2 toward the booster heater 5, but, due to a pressure difference, also flows in a direction opposite to the direction along the flow of water at the normal time, that is, a direction from the load-side heat exchanger 2 toward the joining portion 230.
  • the pressure relief valve 70 is provided in the main passage 220 of the water circuit 210 as in Embodiment 1, the refrigerant mixed into the water may be released from the pressure relief valve 70 to a room together with the water.
  • the refrigerant mixed into the water may be released from the pressure relief valve 301 to the room together with the water. That is, both of the pressure relief valves 70 and 301 function as valves configured to release the refrigerant mixed into the water inside the water circuit 210 to the outside of the water circuit 210.
  • the refrigerant has flammability, there is a fear in that a flammable concentration region may be generated in the room due to the refrigerant released to the room.
  • the interruption device 77 is provided between the load-side heat exchanger 2 and the booster heater 54.
  • a flow of the refrigerant from the load-side heat exchanger 2 to the booster heater 54 can be interrupted. Therefore, leakage of the refrigerant from the pressure relief valve 70 to the room can be prevented.
  • the interruption device 78 is provided between the load-side heat exchanger 2 and the joining portion 230.
  • a flow of the refrigerant from the load-side heat exchanger 2 to the joining portion 230 can be interrupted. Therefore, leakage of the refrigerant from the pressure relief valve 301 to the room can be prevented.
  • Fig. 2 is a circuit diagram for illustrating a schematic configuration of a heat pump use apparatus of a modification example of Embodiment 1.
  • this modification example is different from the configuration illustrated in Fig. 1 in that the load-side heat exchanger 2 is accommodated in the indoor unit 200.
  • the refrigerant circuit 110 is provided across the outdoor unit 100 and the indoor unit 200. A part of the refrigerant circuit 110 is provided in the outdoor unit 100, and an other part of the refrigerant circuit 110 is provided in the indoor unit 200.
  • the outdoor unit 100 and the indoor unit 200 are connected to each other through two connecting pipes 111 and 112 constructing parts of the refrigerant circuit 110. Also according to this modification example, effects similar to those of the configuration illustrated in Fig.
  • FIG. 3 to Fig. 6 are explanatory views for illustrating examples of the arrangement position of the refrigerant leakage detection device 98 in the heat pump use apparatus according to Embodiment 1.
  • Fig. 3 as the examples of the arrangement position of the refrigerant leakage detection device 98, four arrangement positions A to D are illustrated.
  • the refrigerant leakage detection device 98 is arranged at the arrangement position A or B, the refrigerant leakage detection device 98 is connected to the pipe 72. That is, similarly to the pressure relief valve 70, the refrigerant leakage detection device 98 is connected to the main passage 220 at the booster heater 54 (connecting portion).
  • the refrigerant leakage detection device 98 is connected to the main passage 220 at the load-side heat exchanger 2, a portion between the load-side heat exchanger 2 and the booster heater 54, or the booster heater 54.
  • the refrigerant is gasified at a time point when the refrigerant is leaked to the water circuit 210. Therefore, due to a difference in specific volume between gas and a liquid, mass velocity when the refrigerant is leaked from the pressure relief valve 70 is reduced to about one thousandth of that when the liquid refrigerant is leaked. Therefore, an amount of the refrigerant, which may be released from the pressure relief valve 70 during a time period from detection of the leakage of the refrigerant to interruption of a flow at the interruption device 77, does not reach an amount which leads to generation of the flammable concentration region in the room.
  • the refrigerant leakage detection device 98 when the refrigerant leakage detection device 98 is arranged at the arrangement position C or D, the refrigerant leakage detection device 98 is connected to the main passage 220 at a portion between the booster heater 54 (connecting portion) and the three-way valve 55. In this case, before the leakage of the refrigerant is detected by the refrigerant leakage detection device 98, the refrigerant may be released from the pressure relief valve 70. However, due to the difference in specific volume between gas and a liquid as described above, the amount of the refrigerant that may be released from the pressure relief valve 70 does not reach the amount which leads to the generation of the flammable concentration region in the room.
  • the refrigerant leakage detection device 98 be connected to the main passage 220 at a portion between the interruption device 77 and the interruption device 78.
  • the refrigerant leakage detection device 98 may be connected to the main passage 220 at a portion between the interruption device 78 and the joining portion 230.
  • the refrigerant leakage detection device 98 is not connected to the branch passage, for example, the heater circuit-side pipe 82a or 82b or the heater 300, which is installed by an on-site installation worker, but is connected to the main passage 220. Therefore, mounting of the refrigerant leakage detection device 98 and connection between the refrigerant leakage detection device 98 and the controller 201 can be carried out by a manufacturer of the indoor unit 200. Therefore, it is possible to avoid such a human error as to forget to mount the refrigerant leakage detection device 98 and connect the refrigerant leakage detection device 98.
  • the heat pump water heater 1000 (example of the heat pump use apparatus) according to Embodiment 1 includes the refrigerant circuit 110 configured to circulate the refrigerant, the water circuit 210 (example of the heat medium circuit) configured to allow water (example of the heat medium) to flow therethrough, and the load-side heat exchanger 2 (example of the heat exchanger) configured to exchange heat between the refrigerant and the water.
  • the water circuit 210 includes the main passage 220 extending through the load-side heat exchanger 2.
  • the main passage 220 includes the three-way valve 55 (example of the branching portion) to which the plurality of branch passages 221 and 222 branched from the main passage 220 are connected, and the joining portion 230 at which the plurality of branch passages 221 and 222 are connected to each other to be joined to the main passage 220.
  • the three-way valve 55 is provided at the downstream end of the main passage 220.
  • the joining portion 230 is provided at the upstream end of the main passage 220.
  • the pressure relief valve 70 (example of the pressure protection device) and the refrigerant leakage detection device 98 are connected to the main passage 220.
  • the pressure relief valve 70 is configured to release water to the outside of the water circuit 210 based on the pressure in the water circuit 210.
  • the refrigerant leakage detection device 98 is configured to detect the leakage of the refrigerant from the refrigerant circuit 110 to the water circuit 210.
  • the pressure relief valve 70 is connected to the main passage 220 at the booster heater 54 (example of the connecting portion) located between the load-side heat exchanger 2 and one of the three-way valve 55 and the joining portion 230.
  • the interruption device 77 (example of the first interruption device) configured to be able to interrupt a flow from the load-side heat exchanger 2 to the booster heater 54 is provided in the main passage 220 at a portion between the load-side heat exchanger 2 and the booster heater 54.
  • the interruption device 78 (example of the second interruption device) configured to be able to interrupt a flow from the load-side heat exchanger 2 to an other of the three-way valve 55 and the joining portion 230 is provided in the main passage 220 at a portion between the load-side heat exchanger 2 and the other of the three-way valve 55 and the joining portion 230.
  • each of the interruption devices 77 and 78 is the on-off valve which is closed when the leakage of the refrigerant into the water circuit 210 is detected. According to this configuration, when the refrigerant is leaked to the water circuit 210, the flow of the refrigerant mixed into the water can further reliably be interrupted.
  • the refrigerant leakage detection device 98 is connected to the main passage 220 at the joining portion 230, a portion between the joining portion 230 and the booster heater 54, or the booster heater 54. According to this configuration, the leakage of the refrigerant can reliably be detected before the refrigerant leaked to the water circuit 210 is released to the room.
  • the interruption device 78 which is provided between the load-side heat exchanger 2 and the joining portion 230, is the check valve. Further, the refrigerant leakage detection device 98 is connected to the main passage 220 at a portion between the check valve and the booster heater 54 or at the booster heater 54. According to this configuration, the leakage of the refrigerant can reliably be detected before the refrigerant leaked to the water circuit 210 is released to the room.
  • the refrigerant leakage detection device 98 is connected to the main passage 220 at a portion between the interruption device 77 and the interruption device 78. According to this configuration, the amount of the refrigerant released from the pressure relief valve can be reduced to almost exactly zero.
  • the refrigerant leakage detection device 98 is configured to detect the leakage of the refrigerant into the water circuit 210 based on the pressure in the water circuit 210. According to this configuration, the leakage of the refrigerant can reliably be detected.
  • the heat pump water heater 1000 according to Embodiment 1 further includes the outdoor unit 100 accommodating the refrigerant circuit 110, a part of the water circuit 210, and the load-side heat exchanger 2, and the indoor unit 200 accommodating an other part of the water circuit 210.
  • One of the outdoor unit 100 and the indoor unit 200 accommodates the interruption devices 77 and 78 and the refrigerant leakage detection device 98.
  • the controller 101 or the controller 201 can be connected to each of the interruption devices 77 and 78 and the refrigerant leakage detection device 98 in the outdoor unit 100 or the indoor unit 200. Thus, costs can be reduced.
  • the heat pump water heater 1000 according to Embodiment 1 further includes the outdoor unit 100 accommodating a part of the refrigerant circuit 110, and the indoor unit 200 accommodating an other part of the refrigerant circuit 110, the water circuit 210, and the load-side heat exchanger 2.
  • the indoor unit 200 accommodates the interruption devices 77 and 78 and the refrigerant leakage detection device 98.
  • the controller 201 can be connected to each of the interruption devices 77 and 78 and the refrigerant leakage detection device 98 in the indoor unit 200. Thus, costs can be reduced.
  • the refrigerant may be flammable refrigerant or toxic refrigerant.
  • FIG. 7 is a circuit diagram for illustrating a schematic configuration of the heat pump use apparatus according to Embodiment 2.
  • a configuration of the indoor unit 200 is mainly illustrated. Components having the same functions and actions as those of Embodiment 1 are denoted by the same reference symbols, and description thereof is omitted.
  • a boiler circuit 240 configured to heat water accumulated inside the hot-water storage tank 51 is provided outside the hot-water storage tank 51.
  • the boiler circuit 240 includes a water flow passage for connecting a lower portion and an upper portion of the hot-water storage tank 51.
  • the boiler circuit 240 includes a boiler pump 241 and a boiler heat exchanger 242 configured to exchange heat between water flowing through the boiler circuit 240 and water flowing through the branch passage 221.
  • a boiler pump 241 When the boiler pump 241 is operated, water in the lower portion of the hot-water storage tank 51 flows into the boiler circuit 240.
  • the water flowing into the boiler circuit 240 is heated through heat exchange in the boiler heat exchanger 242, and is returned to the upper portion of the hot-water storage tank 51. Also according to Embodiment 2, effects similar to those of Embodiment 1 can be obtained.
  • the plate heat exchanger is given as an example of the load-side heat exchanger 2.
  • the load-side heat exchanger 2 may be a heat exchanger other than the plate heat exchanger, such as a double-pipe heat exchanger as long as the heat exchanger is configured to exchange heat between refrigerant and a heat medium.
  • the heat pump water heater 1000 is given as an example of the heat pump use apparatus.
  • the present invention is also applicable to other heat pump use apparatus, such as a chiller.
  • the indoor unit 200 including the hot-water storage tank 51 is given as an example.
  • the hot-water storage tank may be provided separately from the indoor unit 200.

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

Claims (7)

  1. Appareil servant de pompe à chaleur, comprenant :
    un circuit de réfrigérant (110) configuré pour faire circuler un réfrigérant ;
    un circuit de milieu caloporteur (210) configuré pour permettre à un milieu caloporteur de circuler à l'intérieur ; et
    un échangeur thermique (2) configuré pour échanger de la chaleur entre le réfrigérant et le milieu caloporteur,
    le circuit de milieu caloporteur comprenant un passage principal (220) qui s'étend à travers l'échangeur thermique,
    le passage principal comprenant
    une partie de dérivation (55) à laquelle plusieurs passages de dérivation (221, 222) dérivés du passage principal sont reliés, la partie de dérivation étant prévue au niveau d'une extrémité aval du passage principal, et
    une partie de jonction (230) au niveau de laquelle les passages de dérivation sont reliés les uns aux autres afin d'être joints au passage principal, la partie de jonction étant prévue au niveau d'une extrémité amont du passage principal,
    l'appareil servant de pompe à chaleur comprenant en outre un dispositif de protection contre la pression (70) et un dispositif de détection de fuite de réfrigérant (98),
    le dispositif de protection contre la pression étant relié au passage principal au niveau d'une partie de raccordement (54) située entre l'échangeur thermique et l'une (55) de la partie de dérivation et de la partie de jonction, caractérisée par
    le passage principal qui comprend un premier dispositif d'interruption (77) configuré pour interrompre un écoulement entre l'échangeur thermique et la partie de raccordement, le premier dispositif d'interruption étant prévu entre l'échangeur thermique et la partie de raccordement,
    le passage principal comprenant un second dispositif d'interruption (78) configuré pour interrompre un écoulement entre l'échangeur thermique et une autre (230) de la partie de dérivation et de la partie de jonction, le second dispositif d'interruption étant prévu entre l'échangeur thermique et l'autre de la partie de dérivation et de la partie de jonction, et
    le dispositif de détection de fuite de réfrigérant (98) étant relié au passage principal au niveau d'une partie située entre le premier dispositif d'interruption (77) et la partie de raccordement (54), au niveau de la partie de raccordement (54), au niveau d'une partie située entre la partie de raccordement (54) et la partie de dérivation (55), au niveau d'une partie située entre le second dispositif d'interruption (78) et l'échangeur thermique (2), ou au niveau d'une partie située entre la partie de jonction (230) et le second dispositif d'interruption (78) par rapport à une direction d'écoulement du milieu caloporteur.
  2. Appareil servant de pompe à chaleur selon la revendication 1, dans laquelle le premier dispositif d'interruption et le second dispositif d'interruption comprennent chacun une vanne d'arrêt qui est fermée lorsqu'une fuite de réfrigérant dans le circuit de milieu caloporteur est détectée.
  3. Appareil servant de pompe à chaleur selon la revendication 1, dans laquelle un dispositif d'interruption (78) parmi le premier dispositif d'interruption et le second dispositif d'interruption, qui est prévu entre l'échangeur thermique et la partie de jonction, comprend un clapet anti-retour, et
    dans laquelle le dispositif de détection de fuite de réfrigérant est relié au passage principal au niveau d'une partie située entre le clapet anti-retour et la partie de raccordement, ou au niveau de la partie de raccordement.
  4. Appareil servant de pompe à chaleur selon l'une quelconque des revendications 1 à 3, dans laquelle le dispositif de détection de fuite de réfrigérant est configuré pour détecter la fuite de réfrigérant dans le circuit de milieu caloporteur sur la base de la pression dans le circuit de milieu caloporteur.
  5. Appareil servant de pompe à chaleur selon l'une quelconque des revendications 1 à 4, comprenant en outre :
    une unité d'extérieur (100) qui contient le circuit de réfrigérant, une partie du circuit de milieu caloporteur, et l'échangeur thermique, et une unité d'intérieur qui contient une autre partie du circuit de milieu caloporteur,
    dans laquelle l'une de l'unité d'extérieur et de l'unité d'intérieur contient le premier dispositif d'interruption, le second dispositif d'interruption, et le dispositif de détection de fuite de réfrigérant.
  6. Appareil servant de pompe à chaleur selon l'une quelconque des revendications 1 à 4, comprenant en outre :
    une unité d'extérieur (100) qui contient une partie du circuit de réfrigérant ; et
    une unité d'intérieur (200) qui contient une autre partie du circuit de réfrigérant, le circuit de milieu caloporteur, et l'échangeur thermique, dans laquelle l'unité d'intérieur contient le premier dispositif d'interruption, le second dispositif d'interruption, et le dispositif de détection de fuite de réfrigérant.
  7. Appareil servant de pompe à chaleur selon l'une quelconque des revendications 1 à 6, dans laquelle le réfrigérant comprend un réfrigérant inflammable ou un réfrigérant toxique.
EP16906499.5A 2016-12-21 2016-12-21 Équipement d'utilisation de pompe à chaleur Active EP3358273B1 (fr)

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PCT/JP2016/088107 WO2018116404A1 (fr) 2016-12-21 2016-12-21 Équipement d'utilisation de pompe à chaleur

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US (1) US20190301750A1 (fr)
EP (1) EP3358273B1 (fr)
JP (1) JP6664516B2 (fr)
CN (1) CN110073152B (fr)
WO (1) WO2018116404A1 (fr)

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JP7057510B2 (ja) * 2019-06-14 2022-04-20 ダイキン工業株式会社 冷媒サイクル装置
DE102019123513A1 (de) * 2019-09-03 2021-03-04 Vaillant Gmbh Wärmepumpensystem
DE102019130932A1 (de) * 2019-11-15 2021-05-20 Viessmann Werke Gmbh & Co Kg Verfahren zum Betrieb einer Wärmepumpe
DE102021201712A1 (de) * 2021-02-23 2022-08-25 Glen Dimplex Deutschland Gmbh Wärmepumpenanlage sowie Verfahren zum Betreiben einer Wärmepumpenanlage
EP4372288A1 (fr) 2022-11-18 2024-05-22 Ariston S.p.A. Système de pompe à chaleur comprenant un ou plusieurs dispositifs destinés à bloquer toute fuite de fluide frigorigène

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US4580414A (en) * 1985-08-15 1986-04-08 Engelhard Friedrick R Refrigeration system
WO2000060288A1 (fr) * 1999-04-02 2000-10-12 Matsushita Refrigeration Company Pompe à chaleur
JP2001208392A (ja) * 2000-01-31 2001-08-03 Matsushita Electric Ind Co Ltd ヒートポンプ装置
WO2013038577A1 (fr) * 2011-09-13 2013-03-21 三菱電機株式会社 Dispositif de pompe à chaleur et procédé de commande de dispositif de pompe à chaleur
JP5939828B2 (ja) 2012-02-15 2016-06-22 三菱電機株式会社 ヒートポンプサイクル装置
JP2016003783A (ja) * 2014-06-13 2016-01-12 三菱電機株式会社 ヒートポンプ装置
JP6099608B2 (ja) * 2014-09-25 2017-03-22 三菱電機株式会社 ヒートポンプ装置

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Publication number Publication date
CN110073152B (zh) 2021-03-02
EP3358273A1 (fr) 2018-08-08
WO2018116404A1 (fr) 2018-06-28
US20190301750A1 (en) 2019-10-03
JP6664516B2 (ja) 2020-03-13
JPWO2018116404A1 (ja) 2019-07-11
EP3358273A4 (fr) 2018-08-08
CN110073152A (zh) 2019-07-30

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