WO2021161522A1 - Dispositif de pompe à chaleur et dispositif d'alimentation en eau chaude de type à stockage d'eau chaude - Google Patents

Dispositif de pompe à chaleur et dispositif d'alimentation en eau chaude de type à stockage d'eau chaude Download PDF

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Publication number
WO2021161522A1
WO2021161522A1 PCT/JP2020/005853 JP2020005853W WO2021161522A1 WO 2021161522 A1 WO2021161522 A1 WO 2021161522A1 JP 2020005853 W JP2020005853 W JP 2020005853W WO 2021161522 A1 WO2021161522 A1 WO 2021161522A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
liquid
hot water
heat exchanger
heat
Prior art date
Application number
PCT/JP2020/005853
Other languages
English (en)
Japanese (ja)
Inventor
貴紘 田中
周二 茂木
Original Assignee
三菱電機株式会社
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
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2022500189A priority Critical patent/JP7327630B2/ja
Priority to PCT/JP2020/005853 priority patent/WO2021161522A1/fr
Publication of WO2021161522A1 publication Critical patent/WO2021161522A1/fr

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Classifications

    • 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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water 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
    • F24H9/02—Casings; Cover lids; Ornamental panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • 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

  • This disclosure relates to a heat pump device and a hot water storage type water heater.
  • Patent Document 1 describes heat medium in a unit box provided on the outer surface of the outdoor casing of an outdoor unit having a compressor, an expansion valve, an outdoor heat exchanger, and a blower fan in an air conditioner for heating and cooling with a hot water heating function.
  • the one in which the water supply tank for accommodating the water tank is arranged is disclosed.
  • the present disclosure has been made to solve the above-mentioned problems, and includes a heat pump device capable of providing a circulation pump without enlarging the housing and a hot water storage type water heater equipped with the heat pump device.
  • the purpose is to provide.
  • the heat pump device of the present disclosure includes a housing having an outer wall, a compressor that compresses a refrigerant, a liquid-refrigerator heat exchanger that exchanges heat between a liquid and a refrigerant, and a liquid-liquid refrigerant heat exchanger that exchanges heat between the liquid and the refrigerant.
  • the compressor and the liquid-fluid heat exchanger are arranged inside the housing, and the circulation pump is arranged outside the outer wall of the housing.
  • the hot water storage type water heater of the present disclosure includes the above heat pump device and a hot water storage tank.
  • a heat pump device capable of providing a circulation pump without enlarging the housing, and a hot water storage type water heater equipped with the heat pump device.
  • FIG. 1 It is a circuit diagram which shows the structure of the hot water storage type water heater according to Embodiment 1.
  • FIG. It is an exploded perspective view of the heat pump unit provided in the hot water storage type water heater according to Embodiment 1.
  • water means, in principle, liquid water, and may include low-temperature water to high-temperature hot water.
  • FIG. 1 is a circuit diagram showing a configuration of a hot water storage type water heater 1 according to the first embodiment.
  • FIG. 2 is an exploded perspective view of the heat pump unit 100 included in the hot water storage type water heater 1 according to the first embodiment.
  • the hot water storage type water heater 1 of the present embodiment includes a heat pump unit 100 and a hot water storage tank 200.
  • the heat pump unit 100 corresponds to the heat pump device according to the first embodiment.
  • the hot water storage tank 200 is arranged inside a tank unit housing (not shown) that is separate from the heat pump unit 100.
  • the hot water storage tank 200 is covered with a heat insulating material inside the tank unit housing.
  • the heat pump unit 100 is arranged outside the building.
  • the hot water storage tank 200 may be arranged outside the building or may be arranged inside the building.
  • the hot water storage tank 200 can store hot water heated by the heat pump unit 100.
  • the heat pump unit 100 includes a liquid inlet valve 31 and a liquid outlet valve 32.
  • One end of the external pipe 51 is connected to the liquid inlet valve 31.
  • the other end of the external pipe 51 communicates with the lower part of the hot water storage tank 200.
  • One end of the external pipe 52 is connected to the liquid outlet valve 32.
  • the other end of the external pipe 52 communicates with the upper part of the hot water storage tank 200.
  • the external pipe 51 and the external pipe 52 are arranged outside the heat pump unit 100.
  • the liquid inlet valve 31 and the liquid outlet valve 32 have a structure that can be detached from the external pipe 51 and the external pipe 52.
  • the heat pump unit 100 may be installed at a location away from the hot water storage tank 200. In such a case, the total length of the external pipe 51 and the external pipe 52 becomes long.
  • a water supply pipe (not shown) is connected to the bottom of the hot water storage tank 200.
  • a hot water supply pipe (not shown) is connected to the upper part of the hot water storage tank 200.
  • the downstream of the hot water supply pipe is connected to a hot water supply destination such as a bathtub, a shower, or a faucet.
  • a hot water supply destination such as a bathtub, a shower, or a faucet.
  • the heat pump unit 100 further includes a refrigerant circuit 101, a housing 102, a fan motor 5, a propeller fan 6, a circulation pump 8, and a housing 9.
  • the refrigerant circuit 101, the fan motor 5, and the propeller fan 6 are arranged in the housing 102.
  • the circulation pump 8, the liquid inlet valve 31, and the liquid outlet valve 32 are arranged outside the housing 102.
  • the refrigerant circuit 101 includes a compressor 12, a liquid-refrigerant heat exchanger 2, an expansion valve 3, an evaporator 4, an internal heat exchanger 7, and a refrigerant pipe 15 connecting them.
  • the compressor 12 compresses the refrigerant.
  • the refrigerant may be, for example, carbon dioxide, ammonia, propane, isobutane, HFC or other chlorofluorocarbons, HFO-1123, or HFO-1234yf.
  • the compressor 12 may be covered with a heat insulating material or a soundproofing material.
  • the liquid-refrigerant heat exchanger 2 is housed in the housing 9.
  • a heat insulating material (not shown) covering the liquid-refrigerant heat exchanger 2 may be provided in the housing 9.
  • the liquid-refrigerant heat exchanger 2 has a liquid passage 2a through which a liquid, which is a heat medium, flows, and a refrigerant passage 2b through which a refrigerant flows.
  • the liquid-refrigerant heat exchanger 2 exchanges heat between the liquid flowing through the liquid passage 2a and the refrigerant flowing through the refrigerant passage 2b.
  • the liquid can be heated by exchanging heat between the liquid and the high-temperature high-pressure refrigerant compressed by the compressor 12 in the liquid-refrigerant heat exchanger 2.
  • the circulation pump 8 supplies the liquid to the liquid-refrigerant heat exchanger 2.
  • a case where water is used as a liquid as a heat medium will be described as an example.
  • the heat pump device in the present disclosure may use a liquid other than water such as an aqueous solution of calcium chloride, an aqueous solution of ethylene glycol, an aqueous solution of propylene glycol, and alcohol as a heat medium.
  • the expansion valve 3 expands the high-pressure refrigerant downstream of the refrigerant passage 2b of the liquid-refrigerant heat exchanger 2 to reduce the pressure.
  • the expansion valve 3 is an example of a pressure reducing device.
  • a capillary tube may be used as a pressure reducing device.
  • the evaporator 4 evaporates the low-pressure refrigerant by exchanging heat between the outside air and the low-pressure refrigerant downstream of the expansion valve 3.
  • the fan motor 5 drives the propeller fan 6. When the propeller fan 6 rotates, outside air flows through the evaporator 4.
  • the internal heat exchanger 7 is a high-pressure refrigerant downstream of the refrigerant passage 2b of the liquid-refrigerant heat exchanger 2 and upstream of the expansion valve 3, and downstream of the evaporator 4 and upstream of the compressor 12. Exchanges heat with the low pressure refrigerant.
  • the high-pressure refrigerant downstream of the liquid-refrigerant heat exchanger 2 flows to the expansion valve 3 after passing through the internal heat exchanger 7.
  • the low-pressure refrigerant downstream of the evaporator 4 is sucked into the compressor 12 after passing through the internal heat exchanger 7.
  • the heat pump unit 100 further includes a passage 33, a passage 34, and a passage 35.
  • the passage 33 connects the liquid inlet valve 31 to the suction port of the circulation pump 8.
  • the passage 34 connects the discharge port of the circulation pump 8 to the inlet of the liquid passage 2a of the liquid-refrigerant heat exchanger 2.
  • the passage 35 connects the outlet of the liquid passage 2a of the liquid-refrigerant heat exchanger 2 to the liquid outlet valve 32.
  • the water circuit 201 is provided by the hot water storage tank 200, the external pipe 51, the liquid inlet valve 31, the passage 33, the circulation pump 8, the passage 34, the liquid passage 2a, the passage 35, the liquid outlet valve 32, and the external pipe 52. Is formed.
  • the heat pump unit 100 includes an inlet temperature sensor 21, an outlet temperature sensor 22, a discharge refrigerant temperature sensor 23, an evaporation temperature sensor 24, and an outside air temperature sensor 25.
  • the inlet temperature sensor 21 is attached to the passage 34.
  • inlet temperature the temperature of the liquid at the inlet of the liquid passage 2a
  • outlet temperature the temperature of the liquid at the outlet of the liquid passage 2a
  • outlet temperature the temperature of the liquid at the outlet of the liquid passage 2a
  • the outlet temperature is detected by the outlet temperature sensor 22.
  • the discharge refrigerant temperature sensor 23 is attached to the refrigerant pipe 15 between the compressor 12 and the liquid-refrigerant heat exchanger 2.
  • the temperature of the refrigerant discharged from the compressor 12 will be referred to as “discharged refrigerant temperature”.
  • the discharge refrigerant temperature sensor 23 detects the discharge refrigerant temperature.
  • the evaporation temperature sensor 24 detects the piping temperature of the evaporator 4.
  • the outside air temperature sensor 25 detects the outside air temperature.
  • the outside air temperature sensor 25 is arranged in a portion exposed to the outside of the heat pump unit 100 or a portion exposed to the outside air.
  • the heat pump unit 100 of the present embodiment further includes a refrigerant circuit control unit 26 and a water circuit control unit 27.
  • the refrigerant circuit control unit 26 receives signals from each of the inlet temperature sensor 21, the outlet temperature sensor 22, the discharge refrigerant temperature sensor 23, the evaporation temperature sensor 24, and the outside air temperature sensor 25, and based on these signals, the compressor The rotation speed of the 12 is controlled, the opening degree of the expansion valve 3 is controlled, and the rotation speed of the fan motor 5 is controlled.
  • the water circuit control unit 27 controls the rotation speed of the circulation pump 8.
  • the refrigerant circuit control unit 26 and the water circuit control unit 27 may include at least one memory and at least one processor. The refrigerant circuit control unit 26 and the water circuit control unit 27 may be able to communicate with each other.
  • the refrigerant circuit control unit 26 and the water circuit control unit 27 operate the refrigerant circuit 101 and the water circuit 201 to accumulate hot water in the hot water storage tank 200.
  • the temperature of the high-temperature and high-pressure gas refrigerant discharged from the compressor 12 drops by applying heat to the water in the water circuit 201 in the liquid-refrigerant heat exchanger 2.
  • the pressure of the high-pressure refrigerant is equal to or higher than the critical pressure, the refrigerant remains in the supercritical state, the temperature drops without gas-liquid phase transition, and heat is released.
  • the pressure of the high-pressure refrigerant is equal to or lower than the critical pressure, the refrigerant releases heat while liquefying.
  • the refrigerant decompressed when passing through the expansion valve 3 becomes a gas-liquid two-phase state at low pressure.
  • This low-pressure refrigerant absorbs the heat of the outside air while passing through the evaporator 4, so that it evaporates and gasifies.
  • the low-pressure refrigerant leaving the evaporator 4 is sucked into the compressor 12 through the internal heat exchanger 7 and recirculated. In this way, the refrigeration cycle is formed.
  • the water circuit 201 is as follows. By operating the circulation pump 8, the low-temperature water in the lower part of the hot water storage tank 200 passes through the external pipe 51, the liquid inlet valve 31, the passage 33, the circulation pump 8, and the passage 34, and the liquid-refrigerant heat exchanger. Inflow to 2. The high-temperature water heated by the refrigerant in the liquid-refrigerant heat exchanger 2 flows into the upper part of the hot water storage tank 200 through the passage 35, the liquid outlet valve 32, and the external pipe 52. By performing such a heat storage operation, high-temperature water is sequentially stored inside the hot water storage tank 200 from the upper part to the lower part.
  • the refrigerant circuit control unit 26 controls the rotation speed of the compressor 12 based on the temperature detected by the outside air temperature sensor 25 and the inlet temperature sensor 21, and also controls the outside air temperature sensor 25 and the discharged refrigerant temperature sensor.
  • the opening degree of the expansion valve 3 may be controlled based on the temperature detected by 23.
  • the water circuit control unit 27 may control the rotation speed of the circulation pump 8 so that the outlet temperature detected by the outlet temperature sensor 22 becomes equal to the target temperature.
  • the circulation pump 8 since the circulation pump 8 is provided in the heat pump unit 100, the flow path length from the circulation pump 8 to the liquid-refrigerant heat exchanger 2 is short, so that the flow path resistance is small. Therefore, there is an advantage that the efficiency of water supply from the circulation pump 8 to the liquid-refrigerant heat exchanger 2 is high.
  • the following effects can be obtained by providing the internal heat exchanger 7.
  • the refrigerant circuit 101 it is possible to secure the super heat of the refrigerant returning to the compressor 12, that is, the temperature of the refrigerant sucked into the compressor 12 can be surely made higher than the saturation temperature.
  • the operating efficiency of the heat pump unit 100 is improved, and the refrigerant overflow in the compressor 12 can be reliably prevented.
  • the density of the refrigerant entering the evaporator 4 becomes high, the surplus refrigerant in the refrigerant circuit 101 can be stored in the evaporator 4. As a result, it is possible to reliably prevent the pressure of the high-pressure refrigerant from becoming too high.
  • the heat pump device of the present disclosure may not include the internal heat exchanger 7.
  • the housing 102 in the heat pump unit 100 of the present embodiment includes a base 13, a first panel 40, a second panel 41, and a top panel 42.
  • the housing 102 has a rectangular parallelepiped outer shape.
  • the base 13 forms the bottom of the housing 102.
  • a housing 9 containing the liquid-refrigerant heat exchanger 2 and a compressor 12 are installed on the base 13.
  • the first panel 40 forms the front surface and the right side surface of the housing 102.
  • the second panel 41 forms a left side surface of the housing 102 and a part of the rear surface of the housing 102.
  • the second panel 41 corresponds to the outer wall of the housing 102.
  • the top panel 42 forms the upper surface of the housing 102.
  • a partition wall 10 is installed inside the housing 102.
  • the partition wall 10 projects upward from the upper surface of the base 13.
  • the internal space of the housing 102 is separated by a partition wall 10 into a machine room 103 on the left side and a blower room 104 on the right side.
  • a compressor 12, an expansion valve 3, and an internal heat exchanger 7 are arranged in the machine room 103.
  • the evaporator 4 is arranged so as to cover the rear surface of the blower chamber 104 and the right side surface of the blower chamber 104.
  • a fan motor 5, a propeller fan 6, and a housing 9 are arranged in the blower chamber 104.
  • the fan motor 5 and the propeller fan 6 are located above the housing 9.
  • the electrical component box 20 is arranged below the top panel 42.
  • the control board and other electric components constituting the refrigerant circuit control unit 26 and the water circuit control unit 27 are housed in the electric component box 20.
  • the ice guard 44 and the grill 45 are attached to the first panel 40.
  • An opening 46 is formed in the first panel 40 of the portion corresponding to the front surface of the housing 102.
  • the grill 45 covers the opening 46.
  • a plate-shaped valve bed 47 is attached to the base 13.
  • the valve bed 47 projects upward from the left end of the base 13.
  • the valve bed 47 supports the liquid inlet valve 31 and the liquid outlet valve 32.
  • the liquid inlet valve 31 and the liquid outlet valve 32 project outward from the outer wall of the valve bed 47.
  • a notch 48 having a shape corresponding to the valve bed 47 is formed in the second panel 41. When the second panel 41 is attached to the base 13, the valve bed 47 closes the notch 48.
  • the liquid inlet valve 31 and the liquid outlet valve 32 are arranged outside the second panel 41.
  • the circulation pump 8 is arranged outside the second panel 41.
  • the circulation pump 8 is adjacent to the outer surface of the second panel 41.
  • the circulation pump 8 may be fixed to the second panel 41.
  • the second panel 41 may support the weight of the circulation pump 8.
  • the base 13 may support the weight of the circulation pump 8 by connecting the circulation pump 8 to the base 13 with a bracket (not shown).
  • the circulation pump 8, the liquid inlet valve 31, and the liquid outlet valve 32 are arranged on the left side surface of the housing 102.
  • the service cover 43 is attached to the left side of the housing 102.
  • the service cover 43 covers the circulation pump 8, the liquid inlet valve 31, and the liquid outlet valve 32.
  • the service cover 43 protects the circulation pump 8, the liquid inlet valve 31, and the liquid outlet valve 32 from wind and rain. At the time of maintenance or inspection, the service cover 43 can be removed from the housing 102.
  • the degree of freedom in equipment layout in the housing 102 can be improved.
  • the space of the machine room 103 can be spared, the effective heat exchange length of the internal heat exchanger 7 can be sufficiently secured. Therefore, the heat exchange efficiency of the internal heat exchanger 7 can be sufficiently increased.
  • the operating efficiency of the heat pump unit 100 can be further improved, the refrigerant overflow in the compressor 12 can be prevented more reliably, and the pressure of the high-pressure refrigerant can be prevented from becoming too high.
  • the circulation pump 8 can be maintained or inspected simply by removing the service cover 43 without disassembling the housing 102. Therefore, the workability of maintenance and inspection can be improved.
  • the circulation pump 8, the liquid inlet valve 31, and the liquid outlet valve 32 are covered with one service cover 43, but as a modification, a cover covering the liquid inlet valve 31 and the liquid outlet valve 32 May cover the circulation pump 8 with another cover.
  • the circulation pump 8 by arranging the circulation pump 8, the liquid inlet valve 31, and the liquid outlet valve 32 together on the left side surface of the housing 102, the occupied area of the heat pump unit 100 can be reduced. It will be more advantageous.
  • the circulation pump 8 is arranged above the liquid inlet valve 31 and the liquid outlet valve 32. This is further advantageous in reducing the occupied area of the heat pump unit 100.
  • the heat pump device of the present disclosure is not limited to that for hot water supply.
  • the heat pump device of the present disclosure can also be applied to, for example, a device that heats a liquid that circulates to perform heating.

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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)

Abstract

L'invention concerne un dispositif de pompe à chaleur (100) comprenant : un boîtier (102) ayant un second panneau (41) qui sert de paroi externe ; un compresseur (12) pour compresser un fluide frigorigène ; un échangeur de chaleur liquide-fluide frigorigène (2) pour échanger de la chaleur entre le fluide frigorigène et un liquide ; et une pompe de circulation (8) pour fournir le liquide à l'échangeur de chaleur liquide-fluide frigorigène (2). Le compresseur (12) et l'échangeur de chaleur liquide-fluide frigorigène (2) sont disposés dans le boîtier (102). La pompe de circulation (8) est disposée à l'extérieur du second panneau (41) du boîtier (102).
PCT/JP2020/005853 2020-02-14 2020-02-14 Dispositif de pompe à chaleur et dispositif d'alimentation en eau chaude de type à stockage d'eau chaude WO2021161522A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2022500189A JP7327630B2 (ja) 2020-02-14 2020-02-14 ヒートポンプ装置及び貯湯式給湯機
PCT/JP2020/005853 WO2021161522A1 (fr) 2020-02-14 2020-02-14 Dispositif de pompe à chaleur et dispositif d'alimentation en eau chaude de type à stockage d'eau chaude

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/005853 WO2021161522A1 (fr) 2020-02-14 2020-02-14 Dispositif de pompe à chaleur et dispositif d'alimentation en eau chaude de type à stockage d'eau chaude

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Publication Number Publication Date
WO2021161522A1 true WO2021161522A1 (fr) 2021-08-19

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PCT/JP2020/005853 WO2021161522A1 (fr) 2020-02-14 2020-02-14 Dispositif de pompe à chaleur et dispositif d'alimentation en eau chaude de type à stockage d'eau chaude

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WO (1) WO2021161522A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012251701A (ja) * 2011-06-02 2012-12-20 Panasonic Corp ヒートポンプ温水暖房装置
JP2013053776A (ja) * 2011-09-01 2013-03-21 Mitsubishi Electric Corp 冷媒回路装置
JP2016085029A (ja) * 2014-10-28 2016-05-19 ダイキン工業株式会社 室外機
WO2019130439A1 (fr) * 2017-12-26 2019-07-04 三菱電機株式会社 Unité extérieure d'alimentation en eau chaude de pompe à chaleur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009299973A (ja) 2008-06-12 2009-12-24 Daikin Ind Ltd 床暖房装置用室外機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012251701A (ja) * 2011-06-02 2012-12-20 Panasonic Corp ヒートポンプ温水暖房装置
JP2013053776A (ja) * 2011-09-01 2013-03-21 Mitsubishi Electric Corp 冷媒回路装置
JP2016085029A (ja) * 2014-10-28 2016-05-19 ダイキン工業株式会社 室外機
WO2019130439A1 (fr) * 2017-12-26 2019-07-04 三菱電機株式会社 Unité extérieure d'alimentation en eau chaude de pompe à chaleur

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JP7327630B2 (ja) 2023-08-16
JPWO2021161522A1 (fr) 2021-08-19

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