WO2017145276A1 - 空気調和装置 - Google Patents

空気調和装置 Download PDF

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Publication number
WO2017145276A1
WO2017145276A1 PCT/JP2016/055348 JP2016055348W WO2017145276A1 WO 2017145276 A1 WO2017145276 A1 WO 2017145276A1 JP 2016055348 W JP2016055348 W JP 2016055348W WO 2017145276 A1 WO2017145276 A1 WO 2017145276A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
heat
cooler
heat exchanger
power converter
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.)
Ceased
Application number
PCT/JP2016/055348
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English (en)
French (fr)
Japanese (ja)
Inventor
喜浩 谷口
▲高▼田　茂生
真作 楠部
貴彦 小林
万誉 篠崎
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 Electric Corp
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Mitsubishi Electric Corp
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 Electric Corp filed Critical Mitsubishi Electric Corp
Priority to EP16891433.1A priority Critical patent/EP3421902B1/de
Priority to JP2018501460A priority patent/JP6689359B2/ja
Priority to PCT/JP2016/055348 priority patent/WO2017145276A1/ja
Publication of WO2017145276A1 publication Critical patent/WO2017145276A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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 conditioner using a refrigerant, and more particularly to a technique for radiating heat loss generated by components of a power conversion device that drives a compressor and a fan.
  • an air conditioning apparatus shall also contain the other cooling-heat apparatus using a refrigerant
  • An air conditioner that performs a refrigeration cycle often uses a compressor that compresses a refrigerant and a fan that generates air to exchange heat with the outside air via a heat exchanger.
  • An electric motor is generally used for rotationally driving the compressor and the fan, and a power converter is used to control the operation of the electric motor. Since driving of the power converter is accompanied by heat generation of components such as a power module constituting the power converter, it is necessary to cool the power converter so as not to cause an abnormally high temperature.
  • heat sinks with fins attached to a controller that encloses a power converter in an air conditioner are brought into close contact with the heat dissipation surface of the power converter component parts, and heat loss is transferred to the air for release and heat exchange.
  • air cooling method in which cooling is performed using the wind on the secondary side of the vessel.
  • refrigerant cooling system in which a pipe for passing a refrigerant used in the refrigeration cycle and a heat radiating surface of a power converter component are brought into close contact with each other through a plate to transmit heat loss to the refrigerant.
  • the refrigerant cooling method even when the compressor is not driven, the wind passes through the finned heat sink as long as the fan is driven. Therefore, it is possible to cool the heat generated by the power converter component that drives the fan. is there.
  • the refrigerant for cooling does not flow to the refrigerant cooler when the compressor is not driven. Therefore, for example, when the power converter that rotates the fan is driven, the power converter component may exceed the heat-resistant temperature range due to the generated heat loss.
  • Japanese Patent No. 5125355 (pages 5-7, FIGS. 2 and 3)
  • Patent Document 1 radiates heat loss generated in a state where the compressor is not driven to the atmosphere through piping and plates constituting the refrigerant cooler. Therefore, it is necessary to design the piping and plate surface area in advance in consideration of the maximum heat loss and the operating environment temperature so that the generated heat loss can be sufficiently dissipated, making the configuration of the refrigerant cooler complex, increasing the size, material costs, etc. Increasing processing costs is an issue.
  • the present invention has been made in response to the above problems, and its main object is to use a refrigerant cooler having the simplest possible structure and the smallest possible size even when the compressor of the air conditioner is not driven.
  • the heat generation (also referred to as loss heat) of the components of the power conversion device can be cooled.
  • One aspect of the air conditioner of the present invention is a refrigeration cycle 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 by piping, and refrigerant circulates.
  • a refrigerant circuit that performs the operation, a power converter that supplies driving force to the electric motor, and a refrigerant cooler that distributes the refrigerant flowing through the refrigerant circuit and causes the refrigerant to absorb heat from the components of the power converter
  • the refrigerant cooler includes a heat radiating plate and a heat radiating pipe through which the refrigerant flows, and the heat radiating pipe includes a refrigerant inlet pipe, a refrigerant outlet pipe, and the refrigerant inlet pipe.
  • At least one bent portion connecting the refrigerant outlet pipe, the component of the power converter is in surface contact with one surface of the plate, and the heat radiating pipe is on the other surface of the plate Contacted Ri, the above the contact portion between the components of the refrigerant cooler and the power converter, a path of the heat source-side heat exchanger has to be positioned, is intended.
  • the air conditioner described above can cool the heat generated by the components of the power converter by circulating the refrigerant used in the refrigeration cycle through the refrigerant cooler.
  • the components of the power converter and the refrigerant cooler are brought into surface contact so that the thermal resistance is reduced, and the pipes constituting the refrigerant cooler are provided with bent portions so that the liquid refrigerant can easily stay.
  • the positional relationship between the refrigerant cooler and the heat exchanger is configured such that the path of the heat source side heat exchanger exists above the contact portion between the refrigerant cooler and the components of the power converter. For this reason, even when the compressor is not driven, the refrigerant remaining in the refrigerant cooler can be moved between the heat source side heat exchanger by natural convection. Therefore, the components of the power converter can be cooled without complicating the configuration of the refrigerant cooler and with a smaller size than the conventional one.
  • FIG. 1 is a refrigerant circuit diagram of an air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the air conditioner of Embodiment 1 includes 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 as refrigerant piping.
  • the refrigerant circuit 17 is connected.
  • each heat exchanger 3 and 5 is equipped with the fans 3a and 5a which usually send air to each heat exchanger 3 and 5, as shown in FIG.
  • the accumulator 14 is provided, but the accumulator 14 is not necessarily required in the present invention.
  • a refrigerant cooler 6 is arranged in 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 3 a and 5 a are each driven by an electric motor, and these electric motors are driven by a power converter 7.
  • the power conversion device 7 includes components such as a power semiconductor, a reactor, a coil, a cement resistor, a power relay, and a transformer that are heat sources. These heat sources generate heat loss due to switching loss, Joule heat, and iron loss. Therefore, when there is no heat radiator, it may become high temperature of 100 degreeC or more, and it may exceed the heat resistance temperature of the insulation seed
  • the components of the power conversion device 7 are collectively denoted by reference numeral 8, and the compressor component of the power conversion device 7 is denoted by reference numeral 8a and the fan component is denoted by 8b.
  • the power converter component parts 8, 8 a, 8 b are arranged on the power converter sheet metal 71.
  • the power converter sheet metal 71 is preferably attached to the refrigerant cooler 6 via the heat transfer members 13, 13a, 13b.
  • the refrigerant cooler 6 includes a first plate 16 on the side to which the component 8 of the power converter is fixed, and a second plate 9 to which the pipe through which the refrigerant flows is fixed. It has.
  • coolant cooler 6 flows is comprised by the refrigerant
  • thermal radiation members 18 and 19 between the 1st plate 16 and the 2nd plate 9, and between the 1st plate 16 and the power converter device metal plate 71, respectively.
  • heat radiating members 18 and 19 include a heat radiating sheet and a heat radiating grease.
  • the component 8 of the power converter mounted on the power converter sheet metal 71 is disposed so as to be in surface contact with the first plate 16 via the power converter sheet metal 71. Heat exchange is performed with the component 8. The heat of the first plate 16 is transferred to the second plate 9, and further the heat of the second plate 9 is transferred to the refrigerant therein through a pipe constituting the refrigerant cooler 6.
  • the refrigerant cooler 6 brings the second plate 9 and the pipe through which the refrigerant in the refrigerant circuit flows into contact with each other so that the thermal resistance is small. Therefore, it fixes so that the refrigerant
  • more than half of the peripheral surfaces of the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 are in contact with the second plate 9.
  • a groove is formed in the second plate 9, and the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 are inserted into the groove.
  • the second plate 9 and the first plate 16 of the refrigerant cooler 6 are made of a metal having good thermal conductivity such as aluminum or copper.
  • the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 constituting the refrigerant cooler 6 are made of a metal having good thermal conductivity such as aluminum and copper.
  • the contact may be made by brazing or pressure welding, or through a heat radiation sheet or heat radiation grease. From the viewpoint of service, it is better to configure the second plate 9 and the first plate 16 so that they can be brought into contact with each other via a heat dissipation sheet or heat dissipation grease, which is a heat dissipation member, and removed.
  • the component 8 of the power converter can be cooled by bringing the surface of the component 8 of the power converter 8 that generates heat into thermal contact with the first plate 16. At this time, it is preferable that the components 8 are brought into contact with each other via a heat dissipating sheet or a heat dissipating member 19 of heat dissipating grease so that the component 8 can be removed.
  • the first plate 16 may be omitted, and the power converter component 8 may be directly attached to the second plate 9. By doing so, the thermal resistance can be reduced by the amount of the first plate 16 and the heat radiating member 19.
  • the first plate 16, the second plate 9 and the power converter sheet metal 71 constituting the refrigerant cooler 6 use a fastening member such as a screw, and if necessary, use a fixture or the like to generate vibration or external force. It is preferable to fix so that thermal contact is not lost.
  • FIG. 2 shows a U-shaped configuration in which the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11 are connected by one turn (bending portion).
  • the number of turns of the refrigerant pipe constituting the refrigerant cooler 6 is not limited to one turn, and may be a plurality of turns such as a W shape. By increasing the number of turns, the contact area between the second plate 9 and the pipe through which the refrigerant flows can be increased, and the heat dissipation efficiency can be increased.
  • the purpose of providing a turn in the refrigerant pipe constituting the refrigerant cooler 6 is to make it easier for liquid refrigerant to stay when the compressor is stopped, in addition to the effect of increasing the contact area.
  • the diameter of the pipe may be increased, and the second plate surface in contact with the pipe may be provided with a groove in accordance with the pipe shape. You may employ
  • the refrigerant pipe constituting the refrigerant cooler 6 has one or more bent parts 15 at the lower end part between the refrigerant inlet pipe 10 and the refrigerant outlet pipe 11.
  • the pipe constituting 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.
  • the refrigerant cooler 6 is attached so that the contact portion between the refrigerant cooler 6 and the component 8 of the power conversion device exists below the heat source side heat exchanger path. By doing so, the liquid refrigerant stays in the refrigerant cooler 6, and even if the components of the power conversion device generate heat when the compressor 1 is stopped, thermal contact with the refrigerant cooler 6 can be maintained. The heat generated by the component 8 of the power converter is transferred to the liquid refrigerant.
  • the refrigerant pipe from the refrigerant cooler 6 to the use side heat exchanger 3 is routed as perpendicular to the ground as possible so that the refrigerant can be connected through the shortest path and the refrigerant can easily stay in the refrigerant cooler 6. It is good. However, you may provide the bending part 15 according to the structure of an outdoor unit. In addition, heat can be efficiently and efficiently transferred as the distance between the heat source side heat exchanger 5 and the pipe end 10a of the refrigerant inlet pipe 10 connected thereto or the pipe end 11a of the refrigerant outlet pipe 11 is shorter.
  • the high-temperature and high-pressure refrigerant that has flowed out of the compressor 1 is condensed in the use-side heat exchanger 3, radiates heat to the use side at that time, and further, the refrigerant is brought into a low-temperature low-pressure liquid or gas-liquid two-phase state by the use-side expansion device 4a. Become. Thereafter, the refrigerant becomes low-temperature and low-pressure gas by the heat source side heat exchanger 5, passes through the accumulator 14, and returns to the compressor 1.
  • the refrigerant cooler 6 allows the entire flow rate used in the refrigeration cycle to flow to the piping of the refrigerant cooler 6, where the component 8 of the power converter is cooled.
  • the refrigerant cooler 6 In the cooling by the refrigerant cooler 6, by adjusting the temperature of the refrigerant flowing into the refrigerant cooler 6 on the refrigerant circuit using an electronic expansion valve, a capillary tube, a double tube, an electromagnetic valve, or a thin tube, The cooling capacity of the refrigerant cooler 6 can be adjusted. By doing in this way, lack of cooling capacity and dew condensation can be avoided.
  • the high-temperature and high-pressure refrigerant that has flowed out of the compressor 1 becomes a high-pressure liquid by the heat source side heat exchanger 5 and flows to the piping of the refrigerant cooler 6 to cool the components of the power converter and to the use side heat exchanger 3 side. Sent.
  • the refrigerant becomes a low-temperature and low-pressure liquid by the use-side expansion device 4a, exchanges heat in the use-side heat exchanger 3 to become a low-temperature and low-pressure gas, and returns to the compressor 1 through the accumulator 14.
  • the piping of the refrigerant cooler 6 passes the entire flow rate of the refrigerant used in the refrigeration cycle, and cools the component 8 of the power converter.
  • the cooling capacity of the refrigerant cooler 6 can be adjusted. By doing in this way, lack of cooling capacity and dew condensation can be avoided.
  • the snow sensor operation mode (1) is a mode in which only the fan 5a for the heat source side heat exchanger 5 is driven while the compressor 1 is stopped so that the snow does not accumulate or the accumulated snow is blown away. Since the power conversion device that drives the fan 5a operates, heat loss of the component 8b of the power conversion device occurs.
  • the inverter overheating operation mode (2) when the refrigerant is accumulated in the compressor 1 while the outdoor unit is stopped, the compressor 1 is heated to gasify the liquid refrigerant in the compressor 1. This is an operation in which the motor winding in the compressor 1 is energized and heated without rotating the compressor 1. Also at this time, since the power conversion device operates, heat loss of the component 8a of the power conversion device is generated.
  • the operation mode of driving a compressor connected to another system in (3) is, for example, a first system provided with a refrigerant cooler 6 that cools the power converter for trial operation or operation check of the air conditioner.
  • a compressor connected to another second system is driven using the power conversion device used in the first system, the refrigerant does not circulate in the first system where the compressor is not driven.
  • Equipment components generate heat loss.
  • the heat loss can be efficiently radiated by moving the gas refrigerant into the path of the heat source side heat exchanger 5.
  • the refrigerant that has dissipated the heat becomes liquid refrigerant 33 and repeats the natural circulation of returning to the refrigerant cooler 6 by gravity through the inner wall surface 34 of the pipe.
  • the gasified refrigerant may release the heat loss from the pipe surface before reaching the heat source side heat exchanger 5 and return to the liquid. Since it returns to the refrigerant cooler 6, continuous cooling is possible.
  • the fan 5a is driven to allow the wind to flow, the heat exchange capability in the heat source side heat exchanger 5 is improved, so that the gas refrigerant can be efficiently changed to the liquid refrigerant. Furthermore, when the component 8 of the power conversion device is generating heat by driving the fan 5a, the heat source side heat exchanger 5 is in a forced air cooling state, so that the lost heat is more efficiently transferred to the outside air. Has the effect of releasing. These effects can also be obtained in embodiments described later.
  • FIG. FIG. 5 is a refrigerant circuit diagram of the air-conditioning apparatus according to Embodiment 2 of the present invention.
  • the air conditioner of Embodiment 2 is basically the same as that of Embodiment 1, and is different from Embodiment 1 in the following points. That is, there is no heat source side expansion device, branching from the refrigerant circuit 17 between the heat source side heat exchanger 5 and the use side expansion device 4a, and the suction side of the compressor 1 (if the accumulator 14 is provided, the accumulator is A bypass circuit 17A is provided which leads to the suction side of the compressor 1).
  • the refrigerant cooler 6 similar to Embodiment 1 is installed in the middle of the bypass circuit 17A, and the bypass throttle device 4c and the bypass throttle device 4d are provided before and after the refrigerant cooler 6. is there.
  • the configuration of the refrigerant cooler 6 and the mounting position of the refrigerant cooler 6 may be the same as those in the first embodiment.
  • a heating operation operation of the air-conditioning apparatus will be described.
  • the high-temperature and high-pressure refrigerant that has flowed out of the compressor 1 is condensed in the use side heat exchanger 3 and radiated to the use side. Thereafter, the refrigerant becomes a low-temperature low-pressure liquid or a gas-liquid two-phase state by the use side expansion device 4a, and further becomes a low-temperature low-pressure gas by the heat source side heat exchanger 5, and returns to the compressor 1 through the accumulator 14.
  • the refrigerant cooler 6 branches the refrigerant from any position between the use side expansion device 4a and the heat source side heat exchanger 5 in the refrigerant circuit 17, and converts power through the refrigerant after passing through the bypass expansion device 4c.
  • the component 8 of the device is cooled.
  • the refrigerant that has passed through the refrigerant cooler 6 is further throttled by the bypass throttle device 4d and enters the accumulator 14 on the low pressure side.
  • the bypass expansion devices 4c and 4d to control the intermediate pressure, it is possible to avoid insufficient cooling capacity and condensation.
  • an electronic expansion valve, a capillary tube, a double tube, a solenoid valve, a thin tube, or the like can be used as the throttling device.
  • the high-temperature and high-pressure refrigerant that has flowed out of the compressor 1 becomes a high-pressure liquid by the heat source side heat exchanger 5 and is sent to the use side heat exchanger 3 side.
  • the refrigerant that has become a low-temperature and low-pressure liquid by the use-side expansion device 4a exchanges heat in the use-side heat exchanger 3, becomes a low-temperature and low-pressure gas, returns to the compressor 1 through the accumulator 14.
  • a part of the refrigerant that has exited the heat source side heat exchanger 5 flows through the bypass circuit 17A according to the throttle amount of the bypass throttle devices 4c and 4d, and flows to the pipe of the refrigerant cooler 6.
  • the refrigerant that has passed through the refrigerant cooler 6 cools the component 8 of the power converter, and then returns to the compressor 1 through the bypass expansion device 4d and the accumulator 14.
  • the bypass expansion devices 4c and 4d to control the intermediate pressure, it is possible to avoid insufficient cooling capacity and condensation.
  • an electronic expansion valve, a capillary tube, a double tube, a solenoid valve, a thin tube, or the like can be used as the throttling device.
  • Cooling of the component 8 of the power conversion device during the operations (1) to (3) described in the second embodiment is performed as follows.
  • the heat loss is absorbed by the liquid refrigerant remaining in the pipe constituting the refrigerant cooler 6, and the refrigerant changes its state to become gas. Since the specific gravity of the refrigerant turned into gas is smaller than that of air, it rises through the bypass circuit 17 ⁇ / b> A and the refrigerant circuit 17 and reaches the heat source side heat exchanger 5.
  • the gas refrigerant that has moved into the path of the heat source side heat exchanger 5 dissipates lost heat and becomes liquid refrigerant.
  • the liquid refrigerant repeats the natural circulation of returning to the refrigerant cooler 6 through the refrigerant circuit 17 and the bypass circuit 17A due to gravity. Thereby, even when the compressor 1 is stopped, it is possible to dissipate heat by moving the heat loss of the component 8 of the power converter to the heat source side heat exchanger 5.
  • the front-stage bypass expansion device 4c is located between the refrigerant cooler 6 and the heat source side heat exchanger 5, it is necessary to open the refrigerant circulation.
  • the downstream bypass throttle device 4d is connected to a path leading to the suction side of the compressor 1 or the inlet of the accumulator 14, it is preferably closed in order 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.
  • the liquid refrigerant and the gas refrigerant move in the same pipe to move the heat.
  • the configuration of FIG. By changing the path, the refrigerant in the refrigerant cooler 6 can be circulated efficiently.
  • the configuration of the air-conditioning apparatus of the third embodiment, and heating and cooling operations are basically the same as those of the first embodiment, and are different from the first embodiment in the following points.
  • a bypass circuit 17B which branches from the refrigerant circuit 17 between the refrigerant cooler 6 and the use side expansion device 4a and reaches the inlet of the heat source side heat exchanger for the refrigerant during the cooling operation.
  • a bypass throttle device 42 is provided in the middle of the bypass circuit 17B.
  • An on-off valve that shuts off the refrigerant flow in the middle of the refrigerant circuit between the connection point between the bypass circuit 17B and the refrigerant inlet side of the heat source side heat exchanger 5 and the discharge side of the compressor 1 during the cooling operation. 43 is provided. Note that the configuration of the refrigerant cooler 6 and the mounting position of the refrigerant cooler 6 may be the same as those in the first embodiment.
  • Cooling of the component 8 of the power conversion device during the operations (1) to (3) described above in the third embodiment is performed as follows.
  • the heat loss is absorbed by the liquid refrigerant remaining in the pipe constituting the refrigerant cooler 6, and the refrigerant changes its state to become gas. Since the specific gravity of the refrigerant turned into gas is smaller than that of air, if the expansion device 42 is opened, the gas refrigerant 32 rises through the bypass circuit 17B and reaches the piping in the heat source side heat exchanger 5.
  • a plurality of fins are attached to the heat source side heat exchanger 5 path piping for heat radiation, and a large area for heat radiation to the air is provided.
  • the heat loss is efficiently dissipated by moving the gas refrigerant into the heat source side heat exchanger path, and the gas refrigerant becomes a liquid refrigerant.
  • the liquid refrigerant 33 repeats the natural circulation of returning to the refrigerant cooler 6 through the refrigerant circuit 17 by gravity. Thereby, even when the compressor 1 is stopped, it is possible to dissipate heat by moving the heat loss of the component 8 of the power converter to the heat source side heat exchanger 5.
  • the heat source side expansion device 4b is located between the heat source side heat exchanger 5 and the refrigerant cooler 6, it is necessary to open the refrigerant so that the refrigerant is circulated.
  • the use side expansion device 4a is connected to a path connected to the use side heat exchanger 3, it is preferable to close the use side expansion device 4a in order to continuously cool the refrigerant. Further, when the refrigerant flowing through the bypass circuit 17B moves toward the inlet side of the accumulator 14 or the suction side of the compressor 1 during heating and toward the discharge side of the compressor 1 during cooling, the on-off valve 43 is closed. It is good to.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
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  • Combustion & Propulsion (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
PCT/JP2016/055348 2016-02-24 2016-02-24 空気調和装置 Ceased WO2017145276A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16891433.1A EP3421902B1 (de) 2016-02-24 2016-02-24 Klimatisierungsvorrichtung
JP2018501460A JP6689359B2 (ja) 2016-02-24 2016-02-24 空気調和装置
PCT/JP2016/055348 WO2017145276A1 (ja) 2016-02-24 2016-02-24 空気調和装置

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CN108759193A (zh) * 2018-06-20 2018-11-06 广东美的暖通设备有限公司 空调系统及其冷媒散热装置和方法
WO2019058464A1 (ja) * 2017-09-20 2019-03-28 三菱電機株式会社 空気調和装置
JP2019148417A (ja) * 2019-06-04 2019-09-05 日立ジョンソンコントロールズ空調株式会社 空気調和機
JPWO2021166753A1 (de) * 2020-02-21 2021-08-26
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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CN111140938B (zh) * 2019-12-04 2021-04-09 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
DE102020115492A1 (de) 2020-06-10 2021-12-16 Ebm-Papst Mulfingen Gmbh & Co. Kg Kraftwärmemaschine
US11937400B2 (en) * 2021-03-04 2024-03-19 Nidec Corporation Heat dissipation device and cooling unit

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