EP3421902A1 - Klimatisierungsvorrichtung - Google Patents

Klimatisierungsvorrichtung Download PDF

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Publication number
EP3421902A1
EP3421902A1 EP16891433.1A EP16891433A EP3421902A1 EP 3421902 A1 EP3421902 A1 EP 3421902A1 EP 16891433 A EP16891433 A EP 16891433A EP 3421902 A1 EP3421902 A1 EP 3421902A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
heat
pipe
plate
power conversion
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.)
Granted
Application number
EP16891433.1A
Other languages
English (en)
French (fr)
Other versions
EP3421902B1 (de
EP3421902A4 (de
Inventor
Yoshihiro Taniguchi
Shigeo Takata
Shinsaku Kusube
Takahiko Kobayashi
Kazuyoshi Shinozaki
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP3421902A1 publication Critical patent/EP3421902A1/de
Publication of EP3421902A4 publication Critical patent/EP3421902A4/de
Application granted granted Critical
Publication of EP3421902B1 publication Critical patent/EP3421902B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/006—Cooling of compressor or motor

Definitions

  • the present invention relates to an air-conditioning apparatus using refrigerant and particularly relates to a technology to reject heat loss generated by a component of a power conversion device that drives a compressor or a fan.
  • the air-conditioning apparatus includes another cooling energy device using refrigerant and a compressor.
  • An air-conditioning apparatus that performs a refrigeration cycle often uses a compressor that compresses refrigerant and a fan that generates wind for exchanging heat with outdoor air through a heat exchanger.
  • An electric motor is typically used to rotationally drive the compressor and the fan, and a power conversion device is used to control operation of the electric motor.
  • Driving of the power conversion device is associated with heat generation of components, such as a power module, forming the power conversion device, and thus it is necessary to cool the components to prevent abnormally high temperatures.
  • an air cooling method in which a heat rejecting surface of each component of the power conversion device is brought into close contact with a finned heat sink mounted on a controller including the power conversion device in the air-conditioning apparatus, heat loss is transmitted and rejected to air, and wind at the heat exchanger secondary side is used to cool each component.
  • a refrigerant cooling method in which a pipe that is used in a refrigeration cycle and through which refrigerant flows and the heat rejecting surface of each component of the power conversion device are brought into close contact with each other with a plate interposed between the pipe and the component, and heat loss is transmitted to the refrigerant.
  • the refrigerant for cooling in a state where the compressor is not driven, the refrigerant for cooling does not flow to a refrigerant cooler.
  • a refrigerant pipe at a heat rejecting surface of each component of a power conversion device is bent on the outside of an electrical component box to avoid any component that inhibits heat rejection in the vertical direction, and natural heat rejection from the bent portion is promoted in a state where no refrigerant flows (for example, Patent Literature 1).
  • Patent Literature 1 Japanese Patent No. 5125355 (pages 5 to 7, Fig. 2 , Fig. 3 )
  • Patent Literature 1 heat loss generated in a state where the compressor is not driven is rejected to the atmosphere via a pipe or a plate forming a part of the refrigerant cooler. Consequently, a pipe and a plate surface area need to be designed in consideration of maximum heat loss and the temperature of the use environment such that generated heat loss can be sufficiently rejected, and complication of the configuration, an increase in size, and an increase in material cost and processing cost of the refrigerant cooler are problems.
  • the present invention has been made to address the above problem, and a main object of the present invention is to allow heat (also referred to as heat loss) generated in a component of a power conversion device to be cooled, even in a state where a compressor of an air-conditioning apparatus is not driven, by using a refrigerant cooler having as simple configuration as possible and as small size as possible.
  • An air-conditioning apparatus includes a refrigerant circuit in which a compressor driven by an electric motor, a use side heat exchanger, at least one expansion device, and a heat source side heat exchanger are connected to each other by a pipe and through which refrigerant circulates to execute a refrigeration cycle, a power conversion device configured to supply driving force to the electric motor, and a refrigerant cooler through which the refrigerant flowing through the refrigerant circuit flows to cause the refrigerant to receive heat rejected from a component of the power conversion device.
  • the refrigerant cooler has a heat rejecting plate and a heat rejecting pipe through which the refrigerant flows, the heat rejecting pipe has a refrigerant inlet pipe, a refrigerant outlet pipe, and at least one bent portion connecting the refrigerant inlet pipe and the refrigerant outlet pipe, the component of the power conversion device is in surface contact with one surface of the heat rejecting plate, the heat rejecting pipe is in surface contact with the other surface of the heat rejecting plate, and a path of the heat source side heat exchanger is located above a contact portion between the refrigerant cooler and the component of the power conversion device.
  • the air-conditioning apparatus is able to cool heat generated by the component of the power conversion device by causing the refrigerant used in the refrigeration cycle to flow to the refrigerant cooler.
  • the component of the power conversion device and the refrigerant cooler are brought into surface contact with each other such that thermal resistance is low, and the pipe that forms a part of the refrigerant cooler is provided with the bent portion to allow liquid refrigerant to easily accumulate in the refrigerant cooler. Furthermore, the positional relationship between the refrigerant cooler and the heat exchanger is established such that the path of the heat source side heat exchanger is present above the contact portion between the refrigerant cooler and the component of the power conversion device.
  • the compressor does not operate, it is possible to move refrigerant remaining in the refrigerant cooler, between the refrigerant cooler and the heat source side heat exchanger by natural convection. Consequently, it is possible to cool the component of the power conversion device with a smaller size of the refrigerant cooler than that in the related art without complicating the configuration of the refrigerant cooler.
  • Fig. 1 is a refrigerant circuit diagram of an air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the air-conditioning apparatus according to Embodiment 1 has a refrigerant circuit 17 in which a compressor 1, a four-way valve 2, a use side heat exchanger 3, a use side expansion device 4a, a heat source side expansion device 4b, a heat source side heat exchanger 5, and an accumulator 14 are connected to each other by refrigerant pipes.
  • the use side heat exchanger 3 is normally provided with a fan 3a that sends air to the use side heat exchanger 3
  • the heat source side heat exchanger 5 is normally provided with a fan 5a that sends air to the heat source side heat exchanger 5.
  • the accumulator 14 is provided.
  • the accumulator 14 is not necessarily needed in the present invention.
  • only either the use side expansion device 4a or the heat source side expansion device 4b may be used.
  • a refrigerant cooler 6 is disposed on a point of the refrigerant circuit between the use side expansion device 4a and the heat source side expansion device 4b.
  • the refrigerant cooler 6 will be described in detail later.
  • the compressor 1 and the fans 3a and 5a are driven by respective electric motors, and these electric motors are driven by use of a power conversion device 7.
  • the power conversion device 7 has components such as a power semiconductor, a reactor, a coil, a cement resistor, a power relay, and a transformer that are heat sources. In these heat sources, heat loss is caused due to switching loss, Joule heat, and iron loss. Thus, in the case where no radiator is present, a high temperature of 100 degrees C or higher may be caused, so that there is a possibility that the temperature exceeds the heat-resistant temperature of an insulating element of the component, leading to destruction.
  • the components of the power conversion device 7 are collectively called, the components are designated by reference sign 8, a compressor component of the power conversion device 7 is designated by reference sign 8a, and a fan component of the power conversion device 7 is designated by reference sign 8b.
  • the components 8, 8a, and 8b of the power conversion device are disposed on a power conversion device sheet metal 71.
  • the power conversion device sheet metal 71 is preferably mounted on the refrigerant cooler 6 with heat transfer parts 13, 13a, and 13b interposed between the power conversion device sheet metal 71 and the refrigerant cooler 6.
  • the refrigerant cooler 6 includes a first plate 16 to which the components 8 of the power conversion device are fixed, and a second plate 9 to which a pipe through which refrigerant flows is fixed.
  • the pipe that forms a part of the refrigerant cooler 6 and through which the refrigerant flows includes a refrigerant inlet pipe 10, a refrigerant outlet pipe 11, and a bent portion 15 connecting the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 and has a shape in which the bent portion 15 is located at a lower end.
  • a heat rejecting part 18 may be provided between the first plate 16 and the second plate 9 and a heat rejecting part 19 may be provided between the first plate 16 and the power conversion device sheet metal 71.
  • Examples of the heat rejecting parts 18 and 19 include heat rejecting sheets and heat rejecting grease.
  • the components 8 of the power conversion device placed on the power conversion device sheet metal 71 are disposed to be in surface contact with the first plate 16 with the power conversion device sheet metal 71 interposed between the components 8 and the first plate 16, and heat is exchanged between the first plate and the components 8 of the power conversion device.
  • the heat of the first plate 16 is transmitted to the second plate 9, and further the heat of the second plate 9 is transmitted through the pipe that forms a part of the refrigerant cooler 6, to the refrigerant in the pipe.
  • the second plate 9 and the pipe through which the refrigerant in the refrigerant circuit flows are brought into contact with each other such that thermal resistance is low.
  • the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 are fixed to the second plate 9 to be in contact with each other in as large area as possible.
  • half or more of the peripheral surfaces of the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 is brought into contact with the second plate 9.
  • grooves are preferably formed in the second plate 9, and the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 are preferably inserted into the grooves.
  • the second plate 9 and the first plate 16 of the refrigerant cooler 6 are made of a metal having a high thermal conductivity, such as aluminum and copper.
  • the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 that form parts of the refrigerant cooler 6 are similarly made of a metal having a high thermal conductivity, such as aluminum and copper.
  • the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 may be brought into contact with the second plate 9 by use of brazing or pressure welding or with a heat rejecting sheet, heat rejecting grease, or other material interposed between the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 and the second plate 9.
  • the second plate 9 and the first plate 16 are preferably detachably brought into contact with each other with a heat rejecting sheet or heat rejecting grease that is a heat rejecting part, to be easily serviced.
  • the surfaces of components that generate heat are thermally brought into contact with the first plate 16, and thus it is possible to cool the components 8 of the power conversion device.
  • the components 8 are preferably detachably brought into contact with the first plate 16 with the heat rejecting part 19 such as a heat rejecting sheet and heat rejecting grease between the components 8 and the first plate 16.
  • the first plate 16 may be omitted, and the components 8 of the power conversion device may be mounted directly on the second plate 9. It is possible to decrease the thermal resistance by an amount corresponding to the first plate 16 and the heat rejecting part 19, accordingly.
  • first plate 16, the second plate 9, and the power conversion device sheet metal 71 that form parts of the refrigerant cooler 6 may be fixed by using a fastening part such as a screw and by using a fixing tool or other instrument as necessary, such that thermal contact is not lost due to vibration or external force.
  • the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 are formed in a U shape to be connected by one turn (bent portion).
  • the number of turns of the refrigerant pipe that forms a part of the refrigerant cooler 6 is not limited to one, and may be a plural number as in a W shape. By increasing the number of turns, it is possible to increase the area of contact between the second plate 9 and the pipe through which the refrigerant flows, thereby increasing the heat rejection efficiency.
  • the purpose of providing a turn to the refrigerant pipe that forms a part of the refrigerant cooler 6 is to obtain the effect of increasing the area of contact and is also to allow liquid refrigerant to easily accumulate in a state where the compressor stops.
  • the diameter of the pipe may be increased and a groove may be provided on the second plate surface that is in contact with the pipe, to be formed along the shape of the pipe.
  • a pipe having a shape that can increase the area of contact with the second plate such as a flattened pipe, may be used.
  • the refrigerant cooler 6 As, in a state where the compressor of the air-conditioning apparatus stops, a mechanism that forcedly circulates the refrigerant is not present, liquid refrigerant is caused to accumulate in the refrigerant cooler 6 due to gravity. To this end, the refrigerant pipe that forms a part of the refrigerant cooler 6 has one or more bent portions 15 at the lower end portion between the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11.
  • the pipe that forms a part of the refrigerant cooler 6 has a U shape having one bent portion 15 at the lower end between the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11. Furthermore, to accumulate a large amount of the refrigerant, the refrigerant cooler 6 is mounted such that a contact portion between the refrigerant cooler 6 and the components 8 of the power conversion device is present below a heat source side heat exchanger path.
  • the liquid refrigerant accumulates in the refrigerant cooler 6, and in a state where the compressor 1 stops, even if heat is generated in the components of the power conversion device, thermal contact with the refrigerant cooler 6 is maintained, so that the heat generated in the components 8 of the power conversion device is transmitted to the liquid refrigerant.
  • the refrigerant pipe from the refrigerant cooler 6 to the use side heat exchanger 3 is preferably extended as perpendicularly as possible to the ground such that the refrigerant flows through a shortest path and easily accumulates in the refrigerant cooler 6.
  • the bent portion 15 may be provided depending on the structure of an outdoor unit.
  • the refrigerant cooler 6 causes the entire flow amount of the refrigerant used in the refrigeration cycle to flow through the pipe of the refrigerant cooler 6 to cool the components 8 of the power conversion device.
  • the refrigerant cooler 6 it is possible to adjust the cooling ability of the refrigerant cooler 6 by adjusting the temperature of the refrigerant flowing into the refrigerant cooler 6, using an electronic expansion valve, a capillary tube, a double pipe, a solenoid valve, or a thin pipe on the refrigerant circuit. Consequently, it is possible to avoid condensation and insufficiency of the cooling ability.
  • High-temperature and high-pressure refrigerant having flowed out from the compressor 1 becomes high-pressure liquid at the heat source side heat exchanger 5, flows through the pipe of the refrigerant cooler 6 to cool the components of the power conversion device, and is sent to the use side heat exchanger 3 side.
  • the refrigerant becomes low-temperature and low-pressure liquid at the use side expansion device 4a, exchanges heat and becomes low-temperature and low-pressure gas at the use side heat exchanger 3, flows through the accumulator 14, and returns to the compressor 1.
  • the pipe of the refrigerant cooler 6 allows the entire flow amount of the refrigerant used in the refrigeration cycle to flow through the pipe of the refrigerant cooler 6 to cool the components 8 of the power conversion device.
  • the snow sensor operation mode in (1) is a mode in which only the fan 5a for the heat source side heat exchanger 5 is driven in a state where the compressor 1 stops such that snow does not accumulate or accumulated snow is blown away. As the power conversion device for driving the fan 5a operates, heat loss of the component 8b of the power conversion device occurs.
  • the inverter superheat operation mode in (2) is operation in which, when the refrigerant accumulates in the compressor 1 in a state where the outdoor unit stops, the liquid refrigerant in the compressor 1 is gasified by heating the compressor 1, and the compressor 1 is heated by applying a current to a motor winding in the compressor 1 without rotating the compressor 1. At this time as well, the power conversion device operates, and thus heat loss of the component 8a of the power conversion device occurs.
  • the heat loss is removed in the vicinity of a heat generating portion 30 by liquid refrigerant remaining in a pipe interior 31 that forms a part of the refrigerant cooler 6, and the refrigerant that has received the heat changes in state to become gas.
  • the gas refrigerant 32 flows upward through a pipe center portion and reaches the heat source side heat exchanger 5.
  • a plurality of fins are typically mounted on a pipe at a heat source side heat exchanger path to reject heat, so that a wide area in which heat can be rejected to the air is provided. Thus, it is possible to efficiently reject heat loss when gas refrigerant moves into the path of the heat source side heat exchanger 5.
  • Natural circulation is repeated in which the refrigerant that has rejected the heat becomes liquid refrigerant 33, and flows on a pipe inner wall surface 34, and returns to the refrigerant cooler 6 due to gravity. Consequently, even in a state where the compressor 1 stops, it is possible to move the heat loss of the components 8 of the power conversion device to the heat exchanger and reject the heat loss.
  • gasified refrigerant may reject the heat loss from the pipe surface and return to liquid before reaching the heat source side heat exchanger 5. In this case as well, the liquid refrigerant returns to the refrigerant cooler 6 due to gravity, and thus continuous cooling is possible.
  • Fig. 5 is a refrigerant circuit diagram of an air-conditioning apparatus according to Embodiment 2 of the present invention.
  • the air-conditioning apparatus according to Embodiment 2 is basically the same as in Embodiment 1 and is different from Embodiment 1 in the following points.
  • bypass 17A that branches from a point of a refrigerant circuit 17 between a heat source side heat exchanger 5 and a use side expansion device 4a and is connected to the suction side of a compressor 1 (via the accumulator, in the case where the accumulator 14 is provided) is provided.
  • a refrigerant cooler 6 that is the same as in Embodiment 1 is provided on the bypass 17A, and a bypass expansion device 4c and a bypass expansion device 4d are provided in front and in rear of the refrigerant cooler 6.
  • the configuration of the refrigerant cooler 6, the position at which the refrigerant cooler 6 is mounted, and other aspects may be the same as in Embodiment 1.
  • the refrigerant cooler 6 cools components 8 of a power conversion device through the refrigerant that has branched from any point between the use side expansion device 4a and the heat source side heat exchanger 5 in the refrigerant circuit 17 and has flowed through the bypass expansion device 4c.
  • the refrigerant having passed through the refrigerant cooler 6 is further throttled by the bypass expansion device 4d and enters the accumulator 14 at the low pressure side.
  • An electronic expansion valve, a capillary tube, a double pipe, a solenoid valve, a thin pipe, or other component may be used as the expansion device in this case.
  • High-temperature and high-pressure refrigerant having flowed out from the compressor 1 becomes high pressure liquid at the heat source side heat exchanger 5 and is sent to the use side heat exchanger 3 side.
  • the refrigerant becomes low-temperature and low-pressure liquid at the use side expansion device 4a, exchanges heat and becomes low-temperature and low-pressure gas at the use side heat exchanger 3, flows through the accumulator 14, and returns to the compressor 1.
  • an amount of the refrigerant having flowed out from the heat source side heat exchanger 5 flows through the bypass 17A depending on amounts of throttling of the bypass expansion devices 4c and 4d, and flows into the pipe of the refrigerant cooler 6.
  • the refrigerant having passed through the refrigerant cooler 6 cools the components 8 of the power conversion device, then flows through the bypass expansion device 4d and the accumulator 14, and returns to the compressor 1.
  • An electronic expansion valve, a capillary tube, a double pipe, a solenoid valve, a thin pipe, or other component may be used as the expansion device in this case.
  • Cooling the components 8 of the power conversion device during operation of the above (1) to (3) in Embodiment 2 is performed by the following action.
  • bypass expansion device 4c is present between the refrigerant cooler 6 and the heat source side heat exchanger 5, it is necessary to bring the bypass expansion device 4c into an opened state to circulate the refrigerant.
  • the bypass expansion device 4d at the rear stage is connected to the suction side of the compressor 1 or the path leading to the inlet of the accumulator 14, the bypass expansion device 4d is preferably brought into a closed state to continuously cool the refrigerant.
  • Fig. 6 is a refrigerant circuit diagram of an air-conditioning apparatus according to Embodiment 3 of the present invention.
  • Embodiments 1 and 2 in a state where the compressor 1 stops, movement of heat is made by the liquid refrigerant and the gas refrigerant moving in the same pipe interior.
  • the configuration, heating operation, and cooling operation of the air-conditioning apparatus of Embodiment 3 are basically the same as in Embodiment 1 and are different from Embodiment 1 in the following points.
  • bypass 17B that branches from a point of a refrigerant circuit 17 between the refrigerant cooler 6 and a use side expansion device 4a and is connected to the inlet of a heat source side heat exchanger for the refrigerant during cooling operation is provided.
  • a bypass expansion device 42 is provided on the bypass 17B.
  • an opening-closing valve 43 for blocking flow of the refrigerant is provided on a point of the refrigerant circuit between the connection point of the bypass 17B with the refrigerant inlet side of the heat source side heat exchanger 5 and the discharge side of a compressor 1 during cooling operation.
  • the configuration of the refrigerant cooler 6, the position at which the refrigerant cooler 6 is mounted, and other aspects may be the same as in Embodiment 1.
  • Cooling the components 8 of the power conversion device during operation of the above (1) to (3) in Embodiment 3 is performed as described below.
  • the heat source side expansion device 4b is present between the heat source side heat exchanger 5 and the refrigerant cooler 6, it is necessary to bring the heat source side expansion device 4b into an opened state to circulate the refrigerant.
  • the use side expansion device 4a is connected to the path leading to the use side heat exchanger 3, the use side expansion device 4a is preferably brought into a closed state to continuously cool the refrigerant.
  • the opening-closing valve 43 is preferably closed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
EP16891433.1A 2016-02-24 2016-02-24 Klimatisierungsvorrichtung Not-in-force EP3421902B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/055348 WO2017145276A1 (ja) 2016-02-24 2016-02-24 空気調和装置

Publications (3)

Publication Number Publication Date
EP3421902A1 true EP3421902A1 (de) 2019-01-02
EP3421902A4 EP3421902A4 (de) 2019-03-13
EP3421902B1 EP3421902B1 (de) 2020-04-22

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EP16891433.1A Not-in-force EP3421902B1 (de) 2016-02-24 2016-02-24 Klimatisierungsvorrichtung

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EP (1) EP3421902B1 (de)
JP (1) JP6689359B2 (de)
WO (1) WO2017145276A1 (de)

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US12309983B2 (en) 2022-02-01 2025-05-20 Thermo King Llc Refrigeration system or a heat pump and method of operating a refrigeration system or a heat pump

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CN104596142A (zh) * 2015-01-21 2015-05-06 广东美的制冷设备有限公司 空调器及其控制方法
CN204693625U (zh) * 2015-05-20 2015-10-07 广东志高暖通设备股份有限公司 变频空调及空调室外机散热装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111140938A (zh) * 2019-12-04 2020-05-12 浙江大学山东工业技术研究院 空调外机热管理用散热装置
EP3926254B1 (de) 2020-06-10 2025-01-01 ebm-papst Mulfingen GmbH & Co. KG Kraftwärmemaschine
US12309983B2 (en) 2022-02-01 2025-05-20 Thermo King Llc Refrigeration system or a heat pump and method of operating a refrigeration system or a heat pump

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WO2017145276A1 (ja) 2017-08-31
EP3421902A4 (de) 2019-03-13
JP6689359B2 (ja) 2020-04-28
JPWO2017145276A1 (ja) 2018-09-13

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