WO2019026276A1 - Dispositif à cycle frigorifique - Google Patents

Dispositif à cycle frigorifique Download PDF

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Publication number
WO2019026276A1
WO2019026276A1 PCT/JP2017/028380 JP2017028380W WO2019026276A1 WO 2019026276 A1 WO2019026276 A1 WO 2019026276A1 JP 2017028380 W JP2017028380 W JP 2017028380W WO 2019026276 A1 WO2019026276 A1 WO 2019026276A1
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Prior art keywords
refrigerant
temperature
compressor
heat exchanger
heating
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PCT/JP2017/028380
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English (en)
Japanese (ja)
Inventor
康平 名島
Original Assignee
三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2019533860A priority Critical patent/JP6884213B2/ja
Priority to PCT/JP2017/028380 priority patent/WO2019026276A1/fr
Publication of WO2019026276A1 publication Critical patent/WO2019026276A1/fr

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    • 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

Definitions

  • the present invention relates to a refrigeration cycle apparatus that regulates the temperature of a controller using a refrigerant circuit.
  • the refrigeration cycle apparatus includes an air conditioner including a heat source unit (outdoor unit) and a use side unit (indoor unit) and performing heating and cooling of a space to be air-conditioned using the refrigeration cycle.
  • the outdoor unit is disposed outside the building, and includes a compressor, a heat source side heat exchanger, and the like.
  • the indoor unit is disposed inside a building and has a use side heat exchanger, a pressure reducing device, and the like. And each apparatus mounted in the indoor unit and each apparatus mounted in the outdoor unit are connected by piping to form a refrigerant circuit.
  • the refrigerant circulating in the refrigerant circuit dissipates heat to the air supplied to the usage-side heat exchanger of the indoor unit during the heating operation, and the warmed air is sent to the air-conditioned space. Further, the refrigerant circulating in the refrigerant circuit absorbs heat from the air supplied to the use side heat exchanger during the cooling operation, and the cooled air is sent to the air conditioning target space.
  • the air conditioner has a control device that controls each device of the refrigerant circuit, and the control device is generally disposed in the outdoor unit. Since the control device includes electronic components such as semiconductor elements that generate heat, the temperature may be high. Then, the technique which cools a control apparatus using a refrigerant
  • coolant is disclosed (for example, refer patent document 1).
  • a refrigerant pipe is attached to a refrigerant jacket to which the electronic component is attached, and the electronic component is cooled by the refrigerant flowing through the refrigerant pipe.
  • the outdoor unit of the air conditioning apparatus is installed outdoors, when the air conditioning apparatus is used in an area where the outside air temperature is significantly lower than the freezing point in winter, the ambient temperature of the control apparatus disposed in the outdoor unit is the use environment It may deviate from the temperature.
  • the temperature in the outdoor unit becomes lower than the outside air temperature, and the ambient temperature of the control device is further lowered.
  • Patent Document 1 when the electronic component is cooled by the refrigerant, when the heating operation is performed in an extremely low temperature environment, the control device may not operate properly and the heating operation may not be performed. .
  • the present invention has been made to solve the problems as described above, and it is an object of the present invention to provide a refrigeration cycle apparatus that suppresses the occurrence of an abnormality in a control device during heating operation.
  • a refrigeration cycle apparatus includes a compressor, a utilization side heat exchanger, a pressure reducing device, and a heat source side heat exchanger, and a main circuit in which a refrigerant circulates, and a control unit that controls the operation of the compressor.
  • the refrigeration cycle apparatus of the present invention when the heating operation is being performed, a part of the refrigerant discharged from the compressor flows into the temperature controller, so the temperature controller operates the refrigerant of the refrigerant circuit. Use the high temperature refrigerant to heat the control unit. Thereby, during heating operation of the refrigeration cycle device, it is possible to suppress the occurrence of an abnormality in the control device due to the low temperature of the control device.
  • the configuration shown in the first embodiment may be applied to any apparatus provided with a refrigerant circuit.
  • the temperature shown by the following description is an example, Comprising: It shall be suitably decided in the apparatus to apply.
  • FIG. 1 is a schematic configuration view showing an example of a refrigerant circuit configuration of the air conditioning apparatus according to Embodiment 1 of the present invention.
  • the configuration of the air conditioner 100 will be described based on FIG.
  • the air conditioning apparatus 100 is installed, for example, in a building or the like, and can perform heating operation and cooling operation using a refrigeration cycle that circulates a refrigerant.
  • the air conditioning apparatus 100 includes an outdoor unit 1 that is a heat source unit, a plurality of indoor units 5 that are use-side units connected to the outdoor unit 1 via the gas pipe 3 and the liquid pipe 4, and electronic components 7. And a control device 6 and the like.
  • the air conditioning apparatus 100 performs the heating operation and the cooling operation according to the signals from the plurality of indoor units 5.
  • the flow of the refrigerant during the heating operation is indicated by a solid arrow
  • the flow of the refrigerant during the cooling operation is indicated by a broken arrow.
  • the refrigerant a non-azeotropic mixture refrigerant, a pseudo-azeotropic mixture refrigerant, a single refrigerant or the like is used.
  • the non-azeotropic mixed refrigerant includes HFC (hydrofluorocarbon) refrigerant R407C (R32 / R125 / R134a) and the like.
  • the quasi-azeotropic mixed refrigerant includes HFC refrigerants such as R410A (R32 / R125) or R404A (R125 / R143a / R134a).
  • the single refrigerant includes R22 which is a HCFC (hydrochlorofluorocarbon) refrigerant, R134a which is an HFC refrigerant, or R1234yf or R1234ze which is an HFO refrigerant.
  • natural refrigerant such as carbon dioxide, propane, isobutane or ammonia may be used.
  • the outdoor unit 1 is installed outdoors, and has a function of supplying cold or heat to the plurality of indoor units 5.
  • the outdoor unit 1 includes a compressor 11, a check valve 12, a flow path switching device 13, a heat source side heat exchanger 14, an accumulator 15, and the like.
  • the outdoor unit 1 also includes an outdoor fan 16 and an outside air temperature sensor 17 that detects the temperature of the outside air.
  • the compressor 11 sucks a low-temperature low-pressure refrigerant, compresses the sucked refrigerant into a high-temperature high-pressure refrigerant, and discharges the compressed refrigerant.
  • the compressor 11 includes, for example, a rotary compressor, a scroll compressor, a screw compressor, a reciprocating compressor, or the like.
  • the compressor 11 is preferably an inverter compressor capable of capacity control.
  • the check valve 12 is provided on the discharge side of the compressor 11 and allows the flow of the refrigerant in only one direction. The check valve 12 may be omitted.
  • the flow path switching device 13 is provided on the discharge side of the compressor 11 via a check valve 12.
  • the flow path switching device 13 includes, for example, a four-way valve, and switches the flow path of the refrigerant discharged from the compressor 11 in the heating operation and the cooling operation.
  • the flow path switching device 13 may be a combination of a two-way valve or a three-way valve.
  • the air conditioning apparatus 100 is a heating exclusive device, it is not necessary to provide the flow path switching device 13.
  • the heat source side heat exchanger 14 performs heat exchange between the refrigerant and the air, functions as an evaporator during heating operation, and functions as a condenser during cooling operation.
  • the heat source side heat exchanger 14 is, for example, a fin and tube type heat exchanger, a microchannel heat exchanger, a shell and tube type heat exchanger, a heat pipe type heat exchanger, a double pipe type heat exchanger or a plate heat exchanger. It may be any heat exchanger.
  • One of the heat source side heat exchangers 14 is connected to the suction side of the compressor 11 by the flow path switching device 13 during heating operation, and is connected to the discharge side of the compressor 11 by the flow path switching device 13 during cooling operation .
  • the other heat source side heat exchanger 14 is connected to the indoor unit 5 via the liquid pipe 4.
  • the accumulator 15 is provided on the suction side of the compressor 11 and stores surplus refrigerant generated due to transient operation change or load change. In the accumulator 15, the liquid refrigerant and the gas refrigerant are separated, and only the gas refrigerant is supplied to the compressor 11. The accumulator 15 may be omitted.
  • the outdoor fan 16 is, for example, a propeller fan having a plurality of blades, and supplies air to the heat source side heat exchanger 14. In addition, as long as the outdoor fan 16 is installed in the place which can supply air to the heat source side heat exchanger 14, you may be installed anywhere. When water or brine is used as a heat exchange fluid to exchange heat with the refrigerant, a pump or the like is used instead of the outdoor fan 16.
  • the plurality of indoor units 5 are installed indoors, and have a function of cooling or heating each air conditioning target space by cold or warm heat supplied from the outdoor unit 1.
  • Each indoor unit 5 includes a use side heat exchanger 51, an indoor fan 52, a pressure reducing device 53, and the like. Further, although not shown, each indoor unit 5 is provided with a plurality of indoor temperature sensors or the like for detecting the temperature of each air conditioning target space.
  • the use side heat exchanger 51 performs heat exchange between the refrigerant and the air, functions as a condenser during heating operation, and functions as an evaporator during cooling operation.
  • the use side heat exchanger 51 is, for example, a fin and tube type heat exchanger.
  • the refrigerant discharged from the compressor 11 flows into the use-side heat exchanger 51 via the gas pipe 3.
  • the refrigerant discharged from the compressor 11 and passing through the heat source side heat exchanger 14 flows into the use side heat exchanger 51 via the liquid pipe 4.
  • the indoor fan 52 is, for example, a propeller fan having a plurality of wings, and supplies air to the use side heat exchanger 51.
  • the indoor fan 52 may be installed at a place where air can be supplied to the use side heat exchanger 51.
  • a pump for example, is used instead of the indoor fan 52.
  • the pressure reducing device 53 includes, for example, an electric expansion valve or the like capable of adjusting the flow rate of the refrigerant, and is provided in a pipe between the use side heat exchanger 51 and the heat source side heat exchanger 14.
  • the decompression device 53 decompresses and expands the refrigerant flowing from the use side heat exchanger 51 during heating operation, and decompresses and expands the refrigerant flowing from the heat source side heat exchanger 14 during cooling operation.
  • a mechanical expansion valve, a capillary tube or the like in which a diaphragm is employed in the pressure receiving portion may be used.
  • the air conditioner 100 also has a bypass circuit 20 for adjusting the temperature of the control device 6.
  • the bypass circuit 20 includes a temperature controller 21, a first bypass pipe 22, a second bypass pipe 23, a third bypass pipe 24, a pre-cooling heat exchanger 25, a heating side device 26, and a cooling side device 27.
  • the air conditioning apparatus 100 also includes an apparatus temperature sensor 28 that detects the temperature of the control apparatus 6.
  • the temperature controller 21 is made of, for example, a pipe having good heat conductivity such as aluminum, and the like, and has an inlet 21a into which the refrigerant flows and an outlet 21b from which the refrigerant flows out.
  • the temperature controller 21 is installed in the control device 6 and heats or cools the control device 6 by the heat of the circulating refrigerant.
  • FIG. 2 is a rear perspective view showing an example of a state in which the temperature controller according to Embodiment 1 of the present invention is attached to the control device.
  • the temperature controller 21 is attached to the outside of the housing of the control device 6.
  • the temperature controller 21 meanders so that a plurality of curved tubes 21 x are formed, and is attached to the back surface 6 a of the control device 6.
  • the back surface 6a of the control device 6 to which the temperature controller 21 is attached is covered with, for example, a pipe cover or a member having high heat insulation property such as a resin so that the loss of refrigerant heat due to heat radiation is reduced. It is also good.
  • the temperature controller 21 may be installed on any surface of the control device 6, and may be attached to either the outside or the inside of the control device 6. When the temperature controller 21 is attached to the outside, it is preferable that the control device 6 and the temperature controller 21 be connected by a metal or the like having a high thermal conductivity.
  • FIG. 3 is a front perspective view showing another example of the state in which the temperature controller according to Embodiment 1 of the present invention is attached to the control device.
  • the temperature controller 21 may be attached to the inside of the control device 6 as shown in FIG.
  • the temperature controller 21 has a U-shape, and is mounted so as to cover the inner surfaces of both side surfaces 6 b and the upper surface 6 c of the control device 6.
  • the temperature controller 21 is attached so as not to contact the electronic component 7 of the control device 6.
  • the temperature controller 21 functions only as a heating device and does not function as a cooling device.
  • the first bypass pipe 22 is a refrigerant pipe that connects the discharge side of the compressor 11 and the inlet 21 a of the temperature controller 21. Specifically, one of the first bypass pipes 22 is connected to the pipe between the flow path switching device 13 and the gas pipe 3, and the other is connected to the inflow port 21 a.
  • the second bypass pipe 23 is a refrigerant pipe that connects the outlet 21 b of the temperature controller 21 and the suction side of the compressor 11. Specifically, one of the second bypass pipes 23 is connected to the outlet 21 b and the other is connected to the pipe between the flow path switching device 13 and the accumulator 15.
  • the third bypass pipe 24 is provided separately from the first bypass pipe 22, and connects the discharge side of the compressor 11 and the inlet 21 a of the temperature controller 21. Specifically, one of the third bypass piping 24 is connected to the piping between the compressor 11 and the flow path switching device 13, and the other is joined to the other of the first bypass piping 22, so that the temperature control is performed. It is connected to the inlet 21 a of the vessel 21.
  • the pre-cooling heat exchanger 25 is provided in the third bypass pipe 24.
  • the pre-cooling heat exchanger 25 performs heat exchange between the refrigerant and the air, and cools the refrigerant flowing from the main circuit 10 into the third bypass pipe 24.
  • the pre-cooling heat exchanger 25 is integrally configured with the heat source side heat exchanger 14, and a part of the heat source side heat exchanger 14 is used as the pre-cooling heat exchanger 25.
  • the precooling heat exchanger 25 and the heat source side heat exchanger 14 may be comprised separately, when comprised integrally, the air to the heat source side heat exchanger 14 and the precooling heat exchanger 25 is comprised. Can be supplied by one outdoor fan 16.
  • the heating side device 26 is provided in the first bypass pipe 22.
  • the heating side device 26 is constituted by, for example, a solenoid valve or the like, and adjusts the flow rate of the refrigerant flowing to the first bypass pipe 22.
  • the heating side device 26 may be an on-off valve, or may be one whose opening degree can be adjusted.
  • the cooling side device 27 is provided in the third bypass pipe 24.
  • the cooling side device 27 includes, for example, an electric expansion valve capable of adjusting the flow rate of the refrigerant, and decompresses and expands the refrigerant flowing through the third bypass pipe 24.
  • FIG. 4 is a block diagram showing functions of a control device according to Embodiment 1 of the present invention.
  • the control device 6 includes, for example, a microcomputer, and controls the operation of each actuator (drive component).
  • the control device 6 includes an operation control unit 61 and a bypass circuit control unit 62.
  • the operation control unit 61 receives an instruction from a remote controller (not shown), detection values of the indoor temperature sensors, the outside air temperature detected by the outside air temperature sensor 17, the apparatus temperature Ta detected by the apparatus temperature sensor 28, and the like.
  • the operation control unit 61 controls the frequency of the compressor 11, switching of the flow path switching device 13, the number of rotations of the outdoor fan 16, and the indoor fan 52 so that the room temperature of each air conditioning target space becomes a preset set temperature.
  • the operation control unit 61 outputs, to the bypass circuit control unit 62, an operation mode under execution such as a cooling operation or a heating operation and operation information such as the operation or stop of the compressor 11.
  • the bypass circuit control unit 62 receives the information output from the operation control unit 61, the outside air temperature detected by the outside air temperature sensor 17, and the device temperature Ta detected by the device temperature sensor 28.
  • the bypass circuit control unit 62 controls the flow of the refrigerant to the temperature controller 21 based on the input information. Specifically, the bypass circuit control unit 62 operates the heating side device 26 when the operation mode under execution is the heating operation and the device temperature Ta is lower than the lower limit temperature Tmin (for example, ⁇ 28 ° C.) set in advance. Are controlled to close the cooling side device 27. As a result, a part of the high-temperature and high-pressure refrigerant discharged from the compressor 11 flows into the temperature regulator 21 through the first bypass pipe 22, and the control device 6 is heated.
  • Tmin for example, ⁇ 28 ° C.
  • the bypass circuit control unit 62 controls the heating side device 26 to close when the need for heating is eliminated during heating of the control device 6.
  • operation information indicating that the compressor 11 has been stopped is input when the apparatus temperature Ta is equal to or higher than a preset upper limit temperature Tb (for example, -25.degree. C.) And so on.
  • Tb for example, -25.degree. C.
  • the lower limit temperature Tmin and the upper limit temperature Tb at the time of heating are appropriately determined by the heat resistance temperature of the electronic component 7 and the like.
  • the timing at which the refrigerant flows to the bypass circuit 20 may be determined based on the outside air temperature instead of the device temperature Ta.
  • the bypass circuit control unit 62 opens the cooling side device 27 and controls the heating side device 26 to close. Thereby, a part of the high-temperature and high-pressure refrigerant discharged from the compressor 11 passes through the third bypass pipe 24 and is cooled by the pre-cooling heat exchanger 25 provided in the third bypass pipe 24 to the temperature controller 21. It flows in and the control device 6 is cooled.
  • the bypass circuit control unit 62 may perform control to open the cooling side device 27 only when the device temperature Ta becomes the set temperature during the cooling operation.
  • the bypass circuit control unit 62 may control the opening degree of the open valve of the heating side device 26 and the cooling side device 27 to adjust the amount of refrigerant flowing to the temperature regulator 21.
  • the open / close timing and opening degree of the heating side device 26 and the cooling side device 27 may be controlled by the outside air temperature, the device temperature Ta or a combination of the outside air temperature and the device temperature Ta.
  • the bypass circuit control unit 62 adjusts the opening degree of the heating side device 26 according to the outside air temperature while controlling the heating side device 26 to open during the heating operation.
  • the bypass circuit control unit 62 may determine the timing at which the refrigerant flows to the bypass circuit 20 based on the device temperature Ta, and may control the amount of refrigerant flowing to the bypass circuit 20 based on the outside air temperature. Specifically, the bypass circuit control unit 62 controls the opening degree of the heating side device 26 to be larger as the outside air temperature is lower, and increases the amount of refrigerant used for heating the control device 6.
  • the flow of the refrigerant in the main circuit 10 will be described with reference to FIG. (Heating operation)
  • the low-temperature low-pressure refrigerant is compressed by the compressor 11 and discharged as a high-temperature high-pressure gas refrigerant.
  • the refrigerant discharged from the compressor 11 flows into the indoor units 5 through the gas pipe 3 via the check valve 12 and the flow path switching device 13.
  • each use side heat exchanger 51 The refrigerant that has flowed into each indoor unit 5 flows into each use side heat exchanger 51, is heat-exchanged with the air supplied by each indoor fan 52, and becomes a high-temperature high-pressure liquid refrigerant, each use-side heat exchanger 51 Flow out of At this time, the refrigerant dissipates heat to the air in each use side heat exchanger 51, whereby each air conditioning target space is heated.
  • each use side heat exchanger 51 becomes a low temperature low pressure liquid refrigerant (or two-phase refrigerant) by each pressure reducing device 53 and flows into the heat source side heat exchanger 14 of the outdoor unit 1 through the liquid pipe 4 .
  • the refrigerant that has flowed into the heat source side heat exchanger 14 exchanges heat with air supplied by the outdoor fan 16 and becomes a low-temperature low-pressure gas refrigerant and flows out of the heat source side heat exchanger 14.
  • the refrigerant flowing out of the heat source side heat exchanger 14 is again drawn into the compressor 11 via the flow path switching device 13 and the accumulator 15. Hereinafter, this cycle is repeated.
  • the low-temperature low-pressure refrigerant is compressed by the compressor 11 and discharged as a high-temperature high-pressure gas refrigerant.
  • the refrigerant discharged from the compressor 11 flows into the heat source side heat exchanger 14 via the check valve 12 and the flow path switching device 13.
  • the refrigerant that has flowed into the heat source side heat exchanger 14 exchanges heat with air supplied by the outdoor fan 16 and turns out as a high temperature and high pressure liquid refrigerant from the heat source side heat exchanger 14.
  • the refrigerant flowing out of the heat source side heat exchanger 14 flows into the indoor units 5 through the liquid piping 4.
  • the refrigerant that has flowed into each indoor unit 5 becomes a low-temperature low-pressure liquid refrigerant (or a two-phase refrigerant) by each decompression device 53, and flows into each usage-side heat exchanger 51.
  • the refrigerant that has flowed into each use side heat exchanger 51 exchanges heat with air supplied by each indoor fan 52, and turns out as a low-temperature low-pressure gas refrigerant from each use side heat exchanger 51.
  • the refrigerant absorbs heat from the air in each use side heat exchanger 51, whereby each air conditioning target space is cooled.
  • the refrigerant that has flowed out of each use side heat exchanger 51 flows into the outdoor unit 1 again through the gas pipe 3.
  • the refrigerant having flowed into the outdoor unit 1 is again drawn into the compressor 11 via the flow path switching device 13 and the accumulator 15. Hereinafter, this cycle is repeated.
  • FIG. 5 is a flowchart showing refrigerant heating control performed by the control device according to Embodiment 1 of the present invention during heating operation.
  • the refrigerant heating control of FIG. 5 is started.
  • the operation control unit 61 transmits, to the bypass circuit control unit 62, the operation mode under execution and the operation information of the compressor 11 every set time.
  • the bypass circuit control unit 62 determines whether the device temperature Ta detected by the device temperature sensor 28 is less than a preset lower limit temperature Tmin (for example, ⁇ 28 ° C.) (step ST101). When the device temperature Ta is equal to or higher than the lower limit temperature Tmin (step ST101; NO), the bypass circuit control unit 62 determines that the control device 6 does not need to be heated, and stands by until a preset time elapses. When the time set in advance has elapsed, the bypass circuit control unit 62 performs the determination of step ST101 again. Thus, the process of step ST101 is repeated until the device temperature Ta becomes lower than the lower limit temperature Tmin.
  • a preset lower limit temperature Tmin for example, ⁇ 28 ° C.
  • step ST101 when the device temperature Ta is less than the lower limit temperature Tmin (step ST101; YES), the bypass circuit control unit 62 determines that heating of the control device 6 is necessary, and performs control to open the heating side device 26. (Step ST102). At this time, a part of the high-temperature and high-pressure refrigerant discharged from the compressor 11 flows through the first bypass pipe 22 to the temperature regulator 21, and the control device 6 is heated.
  • the bypass circuit control unit 62 determines whether the operation of the compressor 11 is stopped based on the operation information of the compressor 11 received from the operation control unit 61 (step ST103). When the operation of the compressor 11 is stopped (step ST103; YES), the bypass circuit control unit 62 determines that the control device 6 does not need to be heated, and controls the heating side device 26 to close (step ST104). After step ST104 is performed, the refrigerant heating control ends.
  • bypass circuit control unit 62 determines whether or not device temperature Ta is equal to or higher than upper limit temperature Tb (for example, -25 ° C.) (step ST 105). If the device temperature Ta is less than the upper limit temperature Tb (step ST105; NO), the bypass circuit control unit 62 determines that the temperature of the control device 6 has not sufficiently recovered, and maintains the state of the heating side device 26. Wait until a preset time has passed. When the time set in advance has elapsed, the bypass circuit control unit 62 performs the determination of step ST103 again.
  • upper limit temperature Tb for example, -25 ° C.
  • step ST105 when the device temperature Ta becomes equal to or higher than the upper limit temperature Tb (step ST105; YES), the bypass circuit control unit 62 determines that the temperature of the control device 6 has recovered sufficiently, and closes the heating side device 26. (Step ST106). After step ST106 is performed, the bypass circuit control unit 62 returns to the process of ST101, and the refrigerant heating control is continued.
  • the temperature controller 21 functions as a heating device.
  • the heating side device 26 is opened and the cooling side device 27 is closed.
  • the heating of the control device 6 is continued until the high temperature / high pressure refrigerant flows to the temperature controller 21 and the device temperature Ta recovers to the upper limit temperature Tb (-25.degree. C.) or more or the operation of the compressor 11 is stopped. Is done.
  • FIG. 6 is a flowchart showing refrigerant cooling control performed by the control device according to Embodiment 1 of the present invention at the time of cooling operation.
  • the cooling device cools the control device 6 to prevent the electronic component 7 from overheating in a cooling operation in which a high temperature / high pressure refrigerant flows in the heat source side heat exchanger 14 There is a need to.
  • the refrigerant cooling control of FIG. 6 is started. (Refrigerant cooling control)
  • the operation control unit 61 transmits, to the bypass circuit control unit 62, the operation mode under execution and the operation information of the compressor 11 every set time.
  • the bypass circuit control unit 62 performs control to open the cooling side device 27 (step ST201). At this time, a part of the high-temperature and high-pressure refrigerant discharged from the compressor 11 passes through the third bypass pipe 24, is cooled by the pre-cooling heat exchanger 25, flows to the temperature controller 21, and the control device 6 is cooled. .
  • the bypass circuit control unit 62 determines whether the cooling operation is stopped based on the operation mode and the operation information of the compressor 11 received from the operation control unit 61 (step ST202).
  • the bypass circuit control unit 62 determines that the cooling of the control device 6 needs to be continued, and the operation control is performed while maintaining the state of the cooling side device 27. It waits until the next information is received from the unit 61.
  • the process of step ST202 is performed again. While the cooling operation is being performed, the process of step ST202 is repeated.
  • step ST202 when the cooling operation is stopped (step ST202; YES), the bypass circuit control unit 62 determines that the control device 6 does not need to be cooled, and controls the cooling side device 27 to close (step ST203). ). Then, after step ST203 is performed, the refrigerant cooling control ends.
  • the temperature controller 21 functions as a cooling device.
  • the cooling side device 27 is opened and the heating side device 26 is closed.
  • the low-temperature low-pressure refrigerant flows to the temperature controller 21, and cooling of the control device 6 is performed until the cooling operation is stopped.
  • the refrigeration cycle apparatus heats the control apparatus 6 using a part of the refrigerant discharged from the compressor 11 during the heating operation.
  • a temperature controller 21 is provided.
  • the control device 6 can be heated using the refrigerant circulating in the refrigerant circuit, preventing an excessive temperature drop of the control device 6, and the control device 6 and the air conditioner 100 are normal. Operation can be maintained.
  • the use environment temperature (for example, -30.degree. C. or more) is set for the electronic components used in the control device to operate properly. If the outside air temperature becomes extremely low (for example, less than -30.degree. C.) during heating operation, the electronic components of the control device may not operate properly.
  • conventional air conditioners there are some air conditioners in which the specifications of the control device are made to be high-performance so that the ambient temperature of the control device may be lower than the operating environment temperature.
  • the air conditioning apparatus 100 can heat the control device 6 by the heat of the refrigerant, and the specification of the control device 6 does not have to be high performance.
  • the refrigeration cycle apparatus (for example, the air conditioner 100) includes a first bypass pipe 22, a second bypass pipe 23, and a heating device 26 that adjusts the flow rate of the refrigerant in the first bypass pipe 22.
  • the amount of refrigerant necessary for heating the control device 6 can be made to flow into the temperature controller 21, and the amount of refrigerant flowing through the main circuit 10 can be secured to minimize the decrease in heating capacity.
  • control device 6 controls the opening degree of the heating side device 26 in accordance with the device temperature Ta detected by the device temperature sensor 28 during the heating operation. Thereby, during the heating operation, the flow of the refrigerant to the temperature controller 21 can be controlled according to the device temperature Ta, and when heating of the control device 6 is unnecessary, all the refrigerant discharged from the compressor 11
  • the refrigerant can be used for air conditioning.
  • the air conditioning apparatus 100 maintains the ambient temperature of the control device 6 at the operating environment temperature (for example, -30 ° C. or higher) by performing the refrigerant heating control as shown in FIG. It is possible to further suppress the occurrence of the six abnormalities.
  • control device 6 may control the opening degree of the heating side device 26 according to the outside air temperature detected by the outside air temperature sensor 17 during the heating operation.
  • the timing of start and stop of heating, and the amount of refrigerant flowing into the temperature controller 21 can be set, so that adjustment of the heating capacity in the temperature controller 21 can be performed. It can be carried out.
  • the main circuit 10 includes the flow path switching device 13, and the temperature controller 21 cools the control device 6 with the refrigerant during the cooling operation.
  • the control device 6 can be heated to suppress the temperature decrease of the control device 6, and during the cooling operation, the control device 6 can be cooled to suppress the temperature increase of the control device 6. it can.
  • the heat insulation performance of the control device 6 is enhanced in order to suppress the temperature decrease of the control device 6 during heating operation, but in such a configuration, cooling operation is required. Sometimes, the heat dissipation to the outside air is suppressed and the cooling capacity may be reduced. On the other hand, in the air conditioning apparatus 100, since the control device 6 is heated or cooled according to the operation mode being executed, temperature control suitable for each of the cooling operation and the heating operation is performed.
  • a third bypass pipe 24 connecting the discharge side of the compressor 11 and the inlet 21a of the temperature controller 21 via the pre-cooling heat exchanger 25, and a third bypass pipe And 24 a cooling side device 27 provided.
  • the flow of the refrigerant to the temperature controller 21 in the cooling operation can be controlled and the start and stop of the cooling can be controlled by the simple structure and control.
  • the embodiment of the present invention is not limited to the above embodiment, and various modifications can be made.
  • the number of connections and the connection method are not limited to this.
  • the number of outdoor units 1 and the number of indoor units 5 connected to the outdoor unit 1 may be any number, and the indoor units 5 may be connected in series.
  • the refrigerant heating control and the refrigerant cooling control are not limited to those shown in FIG. 5 and FIG.
  • the bypass circuit control unit 62 may control to decrease the opening degree of the heating side device 26 as the device temperature Ta approaches the upper limit temperature Tb. Good.
  • the bypass circuit control unit 62 may perform control using both the apparatus temperature Ta and the outside air temperature.
  • the bypass circuit control unit 62 may control to close the cooling side device 27 when the device temperature Ta is equal to or lower than the outside air temperature when controlling the cooling side device 27 to open. Thereby, the control device 6 can be prevented from being cooled to the outside air temperature or less, and the occurrence of condensation in the control device 6 can be suppressed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Ce dispositif à cycle frigorifique est équipé: d'un circuit principal, qui est pourvu d'un compresseur, d'un échangeur de chaleur côté utilisation, d'un dispositif de décompression, et un échangeur de chaleur côté source de chaleur, et dans lequel un fluide frigorigène est mis en circulation; un dispositif de commande qui commande les opérations du compresseur; et un régulateur de température, dans lequel une partie du fluide frigorigène refoulé par le compresseur s'écoule lors de l'exécution d'opérations de chauffage, l'échangeur de chaleur côté source de chaleur fonctionnant en tant qu'évaporateur, ledit régulateur de température chauffant le dispositif de commande à l'aide de la partie du fluide frigorigène.
PCT/JP2017/028380 2017-08-04 2017-08-04 Dispositif à cycle frigorifique WO2019026276A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2019533860A JP6884213B2 (ja) 2017-08-04 2017-08-04 冷凍サイクル装置
PCT/JP2017/028380 WO2019026276A1 (fr) 2017-08-04 2017-08-04 Dispositif à cycle frigorifique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/028380 WO2019026276A1 (fr) 2017-08-04 2017-08-04 Dispositif à cycle frigorifique

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WO2019026276A1 true WO2019026276A1 (fr) 2019-02-07

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PCT/JP2017/028380 WO2019026276A1 (fr) 2017-08-04 2017-08-04 Dispositif à cycle frigorifique

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JP (1) JP6884213B2 (fr)
WO (1) WO2019026276A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7025086B1 (ja) * 2021-08-24 2022-02-24 株式会社日本イトミック ヒートポンプ装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61133770U (fr) * 1985-02-08 1986-08-20
JP2001251078A (ja) * 2000-03-03 2001-09-14 Denso Corp 発熱体冷却装置
WO2015053016A1 (fr) * 2013-10-07 2015-04-16 ダイキン工業株式会社 Dispositif de réfrigération du type à récupération de chaleur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61133770U (fr) * 1985-02-08 1986-08-20
JP2001251078A (ja) * 2000-03-03 2001-09-14 Denso Corp 発熱体冷却装置
WO2015053016A1 (fr) * 2013-10-07 2015-04-16 ダイキン工業株式会社 Dispositif de réfrigération du type à récupération de chaleur

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7025086B1 (ja) * 2021-08-24 2022-02-24 株式会社日本イトミック ヒートポンプ装置
WO2023026344A1 (fr) * 2021-08-24 2023-03-02 株式会社日本イトミック Dispositif de pompe à chaleur
KR20230033633A (ko) * 2021-08-24 2023-03-08 가부시키가이샤 니혼 이토믹 히트 펌프 장치
KR102563765B1 (ko) * 2021-08-24 2023-08-07 가부시키가이샤 니혼 이토믹 히트 펌프 장치
US11965680B2 (en) 2021-08-24 2024-04-23 Nihon Itomic Co., Ltd. Heat pump device

Also Published As

Publication number Publication date
JP6884213B2 (ja) 2021-06-09
JPWO2019026276A1 (ja) 2020-05-28

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