EP4145061A1 - Kühlschrank - Google Patents

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Publication number
EP4145061A1
EP4145061A1 EP22191721.4A EP22191721A EP4145061A1 EP 4145061 A1 EP4145061 A1 EP 4145061A1 EP 22191721 A EP22191721 A EP 22191721A EP 4145061 A1 EP4145061 A1 EP 4145061A1
Authority
EP
European Patent Office
Prior art keywords
compressor
bypass passage
receiver
valve
main circuit
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.)
Pending
Application number
EP22191721.4A
Other languages
English (en)
French (fr)
Inventor
Kohei Matsumoto
Yugo SASAYA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Thermal Systems Ltd filed Critical Mitsubishi Heavy Industries Thermal Systems Ltd
Publication of EP4145061A1 publication Critical patent/EP4145061A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0401—Refrigeration circuit bypassing means for the compressor
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0403—Refrigeration circuit bypassing means for the condenser
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0415—Refrigeration circuit bypassing means for the receiver
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/072—Intercoolers therefor
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/16—Receivers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/026—Compressor control by controlling unloaders
    • F25B2600/0261—Compressor control by controlling unloaders external to the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off valves

Definitions

  • the present disclosure relates to a refrigerating apparatus.
  • a typical refrigerating apparatus includes a compressor, a condenser, an expansion valve, and an evaporator.
  • the high-temperature and high-pressure gaseous refrigerant produced by the compressor is first sent to the condenser.
  • the condenser heat exchange between the refrigerant and air is performed, and the refrigerant becomes a high-temperature and high-pressure liquid refrigerant.
  • the temperature and pressure of the refrigerant are lowered, and the refrigerant becomes a low-temperature and low-pressure liquid refrigerant. Further, by exchanging heat with air in the evaporator, the refrigerant becomes a low-temperature and low-pressure gaseous refrigerant. In this process, the temperature of the space where the condenser or evaporator is installed is adjusted.
  • an intermediate heat exchanger is generally disposed between the compressor on the low-pressure side and the compressor on the high-pressure side. The intermediate heat exchanger is provided to improve the efficiency of the refrigerating apparatus.
  • the liquid refrigerant may remain in the intermediate heat exchanger. If this liquid refrigerant is sent to the high-pressure side compressor as it is when the refrigerating apparatus is started, liquid compression occurs, which affects the stable operation of the compressor.
  • the present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide a refrigerating apparatus that can be operated more stably.
  • a refrigerating apparatus includes a main circuit that is a circulation passage through which a refrigerant flows, a first compressor and a second compressor that are arranged in series on the main circuit, an intermediate heat exchanger that is disposed between the first compressor and the second compressor, a condenser that is disposed on a downstream side of the second compressor, a first expansion valve that is disposed on a downstream side of the condenser, a receiver that is disposed on a downstream side of the first expansion valve, a second expansion valve that is disposed on a downstream side of the receiver, an evaporator that is disposed on a downstream side of the second expansion valve, a three-way valve provided between the intermediate heat exchanger and the second compressor on the main circuit, a first bypass passage that couples the three-way valve and the receiver, a second bypass passage that couples the receiver, the three-way valve, and the second compressor, a check valve that is provided in the first bypass passage and allows the refrigerant to
  • the refrigerating apparatus 100 is a heat pump type apparatus that exchanges heat between a refrigerant and air by operating in a refrigeration cycle.
  • the refrigerating apparatus 100 includes a main circuit 90 formed as a circulation passage, a first compressor 1, a second compressor 2, an intermediate heat exchanger 3, a condenser 4, a first expansion valve 5, a receiver 6, a second expansion valve 7, an evaporator 8, a first three-way valve 9, a first bypass passage 10, a second bypass passage 11, a first check valve 12, a first solenoid valve 13, a second solenoid valve 14, an accumulator 15, a third bypass passage 16, a second three-way valve 17, a second check valve 18, a control unit 80, and the like.
  • a main circuit 90 formed as a circulation passage, a first compressor 1, a second compressor 2, an intermediate heat exchanger 3, a condenser 4, a first expansion valve 5, a receiver 6, a second expansion valve 7, an evaporator 8, a first three-way valve 9, a first bypass passage 10, a second bypass passage 11, a first check valve 12, a first solenoid valve 13, a second solenoid valve 14, an accumulator 15, a third bypass passage 16,
  • the main circuit 90 is filled in a state of a refrigerant in a liquid or a gas.
  • the first compressor 1 and the second compressor 2 are arranged in series on the main circuit 90. That is, the discharge side of the first compressor 1 faces the suction side of the second compressor 2.
  • a scroll compressor, a rotary compressor, or a rotary compressor can be used as the first compressor 1 and the second compressor 2.
  • the side on which the second compressor 2 is located when viewed from the first compressor 1 may be referred to as a downstream side, and the opposite side thereof may be referred to as an upstream side.
  • the first three-way valve 9 and the second check valve 18 are arranged in this order on the downstream side of the first compressor 1. The details of the first three-way valve 9 will be described later.
  • the second check valve 18 is configured to allow the refrigerant to flow only in the direction from the upstream side toward the downstream side.
  • the intermediate heat exchanger 3 is disposed between the first compressor 1 and the second compressor 2.
  • the high-temperature refrigerant discharged from the first compressor 1 is cooled by exchanging heat with the external air in the intermediate heat exchanger 3 and then sent to the second compressor 2.
  • the intermediate heat exchanger 3 is provided for improving the efficiency of the refrigerating apparatus 100.
  • the condenser 4 is disposed on the downstream side of the second compressor 2.
  • the condenser 4 is a heat exchanger for exchanging heat between the external air and the refrigerant.
  • a fan (not shown) is provided in the vicinity of the condenser 4, and it is possible to forcibly exchange heat between the air and the refrigerant.
  • the high-temperature and high-pressure gaseous refrigerant produced by the second compressor 2 is condensed by passing through the condenser 4 and becomes a high-temperature and high-pressure liquid refrigerant.
  • the first expansion valve 5 is provided on the downstream side of the condenser 4.
  • the high-temperature and high-pressure liquid refrigerant supplied from the condenser 4 passes through the first expansion valve 5, the pressure and temperature decrease, and the refrigerant becomes a low-temperature and low-pressure liquid refrigerant.
  • the receiver 6 is coupled to the downstream side of the first expansion valve 5.
  • the receiver 6 is a container for storing at least a part of the liquid refrigerant that has passed through the first expansion valve 5.
  • the amount of liquid refrigerant that can exist in the main circuit 90 varies depending on the operating conditions.
  • the receiver 6 is provided to cope with this variation.
  • the second solenoid valve 14 and the second expansion valve 7 are arranged in this order on the downstream side of the receiver 6. As will be described in detail later, the second solenoid valve 14 is provided to switch over to the open state of the main circuit 90.
  • the second expansion valve 7 is provided to further reduce the temperature and pressure of the low-temperature and low-pressure liquid refrigerant that has passed through the receiver 6.
  • the first expansion valve 5 and the second expansion valve 7 are electromagnetic expansion valves that can be switched between the open and closed states by an electric signal from the outside.
  • the evaporator 8 is provided on the downstream side of the second expansion valve 7.
  • the evaporator 8 is a heat exchanger for exchanging heat between the external air and the refrigerant.
  • a fan (not shown) is provided in the vicinity of the evaporator 8 so that heat exchange between air and the refrigerant can be forcibly performed.
  • the low-temperature and low-pressure liquid refrigerant that has passed through the second expansion valve 7 evaporates by exchanging heat with the outside air when passing through the evaporator 8 and becomes a low-temperature and low-pressure gaseous refrigerant.
  • the accumulator 15 is provided on the downstream side of the evaporator 8.
  • the accumulator 15 is a container for storing the liquid refrigerant that could not be completely evaporated by the evaporator 8. After the liquid component is removed by the accumulator 15, the gaseous refrigerant is sent to the first compressor 1 again and compressed. By continuously repeating such a cycle (refrigeration cycle), the refrigerating apparatus 100 is operated.
  • the first bypass passage 10 is a passage coupling the first three-way valve 9 and the receiver 6. That is, the first bypass passage 10 branches from the main circuit 90 via the first three-way valve 9 and extends to the receiver 6.
  • the first check valve 12 is provided on the first bypass passage 10. The first check valve 12 is configured to allow the refrigerant to flow only in the direction from the first three-way valve 9 toward the receiver 6.
  • the second bypass passage 11 couples the above-mentioned second check valve 18 and the second compressor 2, and the receiver 6.
  • the first solenoid valve 13 is provided on the second bypass passage 11. The open and closed states of the first solenoid valve 13 can be switched by an electric signal from the outside.
  • the third bypass passage 16 is a passage that bypasses the downstream side of the accumulator 15 and between the first compressor 1 and the intermediate heat exchanger 3.
  • the second three-way valve 17 is provided on the upstream side of the third bypass passage 16. That is, the third bypass passage 16 branches from the main circuit 90 via the second three-way valve 17.
  • the control unit 80 is provided to switch between the open and closed states of each valve device described above and the operating state of the first compressor 1 and the second compressor 2 by an electric signal. Specifically, the control unit 80 can switch between the open and closed states of the first expansion valve 5, the first three-way valve 9, the second three-way valve 17, the first solenoid valve 13, and the second solenoid valve 14. Further, the control unit 80 can place at least one of the first compressor 1 and the second compressor 2 in an operating state and the other in a stopped state.
  • the control unit 80 closes the first solenoid valve 13. Further, the control unit 80 switches over to the open state of the first three-way valve 9 so that the first three-way valve 9 is opened only in the direction from the intermediate heat exchanger 3 toward the second compressor 2. Further, the control unit 80 switches over to the open state of the second three-way valve 17 so that the second three-way valve 17 is opened only in the direction from the accumulator 15 toward the first compressor 1. As a result, the first bypass passage 10, the second bypass passage 11, and the third bypass passage 16 are closed, and the refrigerant circulates only in the main circuit 90. In the middle of circulating in the main circuit 90, the above-mentioned refrigeration cycle occurs continuously.
  • a part of the gaseous refrigerant may be condensed inside the intermediate heat exchanger 3 to generate a liquid refrigerant.
  • the liquid refrigerant may remain in the intermediate heat exchanger 3. If this liquid refrigerant is sent to the compressor as it is when the refrigerating apparatus 100 is started, liquid compression occurs, which affects the stable operation of the compressor.
  • the first bypass passage 10, the second bypass passage 11, and the third bypass passage 16 are provided, respectively.
  • the control unit 80 switches over to the open state of the first three-way valve 9 so that the first three-way valve 9 is opened only in the direction from the intermediate heat exchanger 3 toward the receiver 6. That is, the first bypass passage 10 is in an open state. Further, the control unit 80 opens the first solenoid valve 13 so that the second bypass passage 11 is opened. Further, the control unit 80 switches over to the open state of the second three-way valve 17 so that the refrigerant flows into the third bypass passage 16.
  • the third bypass passage 16 is placed in an open state in order to prevent the stopped first compressor 1 from being in a reverse pressure state when only the second compressor 2 is started.
  • the state is as shown in FIG. 3 .
  • the control unit 80 closes the first solenoid valve 13 and switches over to the open state of the first three-way valve 9 so that the first bypass passage 10 is opened. Further, the control unit 80 places the second solenoid valve 14 in an open state. Further, the third bypass passage 16 is in a closed state.
  • the refrigerating apparatus 100 it is possible to remove the liquid refrigerant remaining in the intermediate heat exchanger 3 in advance prior to the normal operation. This reduces the possibility of liquid compression occurring in the second compressor 2. As a result, damage to the second compressor 2 is avoided, and the refrigerating apparatus 100 can be operated stably for a longer period of time.
  • the refrigerating apparatus 100 described in each embodiment is grasped as follows, for example.
  • the liquid refrigerant in the intermediate heat exchanger 3 located on the downstream side of the first compressor 1 is pumped through the first bypass passage 10 by the pumping force of the first compressor 1.
  • the liquid refrigerant pumped through the first bypass passage 10 is stored in the receiver 6. In this way, the liquid refrigerant in the intermediate heat exchanger 3 can be recovered to the receiver 6.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP22191721.4A 2021-09-06 2022-08-23 Kühlschrank Pending EP4145061A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021144671A JP2023037868A (ja) 2021-09-06 2021-09-06 冷凍装置

Publications (1)

Publication Number Publication Date
EP4145061A1 true EP4145061A1 (de) 2023-03-08

Family

ID=83049978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22191721.4A Pending EP4145061A1 (de) 2021-09-06 2022-08-23 Kühlschrank

Country Status (2)

Country Link
EP (1) EP4145061A1 (de)
JP (1) JP2023037868A (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100251741A1 (en) * 2007-11-30 2010-10-07 Daikin Industries, Ltd. Refrigeration apparatus
US20140151015A1 (en) * 2011-07-26 2014-06-05 Carrier Corporation Termperature Control Logic For Refrigeration System
US20160272047A1 (en) * 2013-03-21 2016-09-22 Carrier Corporation Capacity modulation of transport refrigeration system
WO2017081782A1 (ja) * 2015-11-11 2017-05-18 富士電機株式会社 排熱回収ヒートポンプ装置
WO2017081781A1 (ja) 2015-11-11 2017-05-18 富士電機株式会社 排熱回収ヒートポンプ装置
JP2021032512A (ja) * 2019-08-27 2021-03-01 ダイキン工業株式会社 熱源ユニット及び冷凍装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100251741A1 (en) * 2007-11-30 2010-10-07 Daikin Industries, Ltd. Refrigeration apparatus
US20140151015A1 (en) * 2011-07-26 2014-06-05 Carrier Corporation Termperature Control Logic For Refrigeration System
US20160272047A1 (en) * 2013-03-21 2016-09-22 Carrier Corporation Capacity modulation of transport refrigeration system
WO2017081782A1 (ja) * 2015-11-11 2017-05-18 富士電機株式会社 排熱回収ヒートポンプ装置
WO2017081781A1 (ja) 2015-11-11 2017-05-18 富士電機株式会社 排熱回収ヒートポンプ装置
JP2021032512A (ja) * 2019-08-27 2021-03-01 ダイキン工業株式会社 熱源ユニット及び冷凍装置

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