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公开(公告)号：US10315488B2
公开(公告)日：2019-06-11
申请号：US15304942
申请日：2015-03-16
发明人： Ryo Miyakoshi , Kenichi Suzuki , Kouhei Yamashita
摘要： There is disclosed a refrigeration device which is capable of inexpensively improving durability of an electronic expansion valve (an outdoor expansion valve) for use in a refrigerant circuit. A vehicle air conditioner 1 has a refrigerant circuit R including an outdoor expansion valve 6. The vehicle air conditioner includes a controller which controls energization to a coil of the outdoor expansion valve 6, and this controller executes operation limit control to limit an operation of the outdoor expansion valve 6 so that a temperature of the coil of the outdoor expansion valve 6 is not in excess of a predetermined value. The controller lengthens a control period of the outdoor expansion valve 6 and suppresses an operation amount of the outdoor expansion valve 6 within a predetermined limit value to limit a duty factor, in the operation limit control.
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公开(公告)号：US10279654B2
公开(公告)日：2019-05-07
申请号：US14914587
申请日：2014-09-02
发明人： Ryo Miyakoshi , Kenichi Suzuki
摘要： There is disclosed an air conditioning device for vehicle in which in a defrosting mode to defrost an outdoor heat exchanger, the defrosting of the outdoor heat exchanger can be achieved without hindrance while maintaining heating of a vehicle interior. A refrigerant discharged from a compressor 2 radiates heat in a radiator 4 and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in an outdoor heat exchanger 7 to heat the vehicle interior. The air conditioning device for vehicle includes an injection circuit 40 which distributes a part of the refrigerant flowing out from the radiator 4 to return the part to the compressor 2. When a controller 32 passes the high-temperature refrigerant through the outdoor heat exchanger 7 to perform defrosting, the controller operates the injection circuit 40 to return the refrigerant to the compressor 2.
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公开(公告)号：US10252600B2
公开(公告)日：2019-04-09
申请号：US15513843
申请日：2015-09-18
发明人： Ryo Miyakoshi , Kenichi Suzuki , Kouhei Yamashita
摘要： There is disclosed an air-conditioning apparatus for vehicle which is capable of selecting an appropriate operation mode while inhibiting the operation mode from being unnecessarily changed, and achieving rapid and stable vehicle interior air conditioning. A controller has respective operation modes of a heating mode, a dehumidifying and heating mode, a dehumidifying and cooling mode, and a cooling mode, and selects and executes these operation modes. The controller has a dehumidifying and heating mode maximum radiator temperature MAP and a dehumidifying and cooling mode maximum radiator temperature MAP. The controller selects an operation mode in which a radiator target temperature TCO is achievable by heat radiation in a radiator 4 with reference to each MAP, on startup or at a time of change of the operation mode.
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公开(公告)号：US10131208B2
公开(公告)日：2018-11-20
申请号：US15703415
申请日：2017-09-13
发明人： Kenichi Suzuki , Megumi Shigeta
摘要： There is disclosed a vehicle air-conditioning device in which a heating qualification by gas injection can sufficiently be obtained. The vehicle air-conditioning device comprises a compressor 2 which compresses a refrigerant, an air flow passage 3 through which air to be supplied into a vehicle interior flows, a radiator 4 disposed in the air flow passage to let the refrigerant radiate heat, a heat absorber 9 disposed in the air flow passage to let the refrigerant absorb heat, an outdoor heat exchanger 7 disposed outside the vehicle interior to let the refrigerant radiate or absorb heat, and a controller. The controller executes a heating mode in which the refrigerant discharged from the compressor 2 radiates heat in the radiator 4 and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the outdoor heat exchanger 7. The vehicle air-conditioning device comprises an injection circuit 40 which distributes a part of the refrigerant flowing out from the radiator 4 to return the refrigerant to the middle of compression by the compressor 2, and the injection circuit 40 has an expansion valve 30, and a discharge side heat exchanger 35 which performs heat exchange between the refrigerant decompressed by the expansion valve 30 and the refrigerant discharged from the compressor 2 before flowing into the radiator 4.
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公开(公告)号：US10059168B2
公开(公告)日：2018-08-28
申请号：US15512409
申请日：2015-09-18
发明人： Kenichi Suzuki , Ryo Miyakoshi , Kouhei Yamashita
CPC分类号： B60H1/00978 , B60H1/00921 , B60H1/2221 , B60H3/024 , B60H2001/00928 , B60H2001/00949 , B60H2001/00957 , F25B5/00 , F25B40/00 , F25B41/04
摘要： There is disclosed a vehicle air conditioner device which is capable of continuing an air conditioning operation also in a case where a disconnection failure occurs in a solenoid valve to change a flow of a refrigerant in each operation mode. Respective solenoid valves 17, 20, 21 and 22 to change the respective operation modes of a vehicle air conditioner device 1 are constituted so that the flow of the refrigerant changes to a cooling mode when all the solenoid valves 17, 20, 21 and 22 are non-energized. The vehicle air conditioner device executes a cooling mode during failure in which a controller adjusts all the solenoid valves 17, 20, 21 and 22 to be non-energized and operates a compressor 2, in a case where the disconnection failure occurs in one of the solenoid valves 17, 20, 21 and 22.
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公开(公告)号：US10040337B2
公开(公告)日：2018-08-07
申请号：US14909353
申请日：2014-08-05
发明人： Ryo Miyakoshi , Kenichi Suzuki , Kouhei Yamashita
摘要： There is disclosed a vehicle air conditioner in which a refrigerant subcool degree of a radiator to satisfy both a high pressure and a refrigerant flow rate during heating can appropriately be controlled to achieve improvement of a heating capability. The vehicle air conditioner comprises a compressor 2 which compresses a refrigerant, a radiator 4 which lets the refrigerant radiate heat, an outdoor heat exchanger 7 disposed outside the vehicle interior to let the refrigerant radiate or absorb heat, and a controller. The controller executes a heating mode to let the refrigerant discharged from the compressor 2 radiate heat in the radiator 4, decompress the refrigerant by which heat has been radiated and then absorb heat in the outdoor heat exchanger 7. The controller 32 has a high pressure priority mode to increase a target radiator subcool degree TGSC of the radiator 4 in a direction in which the high pressure is set to a predetermined high value, and a revolution number priority mode to decrease the target radiator subcool degree of the radiator in a direction in which the revolution number of the compressor 2 is set to a predetermined high value.
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公开(公告)号：US09944256B2
公开(公告)日：2018-04-17
申请号：US14441319
申请日：2013-11-11
IPC分类号： F25D21/02 , B60S1/66 , F25B47/02 , B60H1/00 , F25B5/04 , F25B6/04 , F25B47/00 , F25B49/02 , F25B40/00
CPC分类号： B60S1/66 , B60H1/00921 , B60H1/00978 , B60H2001/00957 , F25B5/04 , F25B6/04 , F25B40/00 , F25B47/006 , F25B47/022 , F25B49/022 , F25B2341/0662 , F25B2347/023 , F25B2700/02 , F25B2700/1933 , F25B2700/2106 , F25B2700/21161 , F25B2700/21171
摘要： A vehicle air conditioner which improves the frost formation judging precision of an outdoor heat exchanger, acquires the heating performance, and avoids unnecessary defrosting. A controller executes a heating mode. The controller (32) judges frost formation onto the outdoor heat exchanger (7) on the basis of a refrigerant evaporation pressure PXO of the outdoor heat exchanger (7) and a refrigerant evaporation pressure PXObase of the outdoor heat exchanger (7) during non-frost formation or on the basis of a refrigerant evaporation temperature TXO of the outdoor heat exchanger (7) and a refrigerant evaporation temperature TXObase of the outdoor heat exchanger (7) during the non-frost formation, and allows a high-temperature refrigerant gas to flow through the outdoor heat exchanger (7), thereby performing defrosting of the outdoor heat exchanger (7).
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公开(公告)号：US09944151B2
公开(公告)日：2018-04-17
申请号：US14889129
申请日：2014-05-19
发明人： Kenichi Suzuki
CPC分类号： B60H1/00921 , F25B5/04 , F25B6/04 , F25B40/00 , F25B40/02 , F25B41/04 , F25B49/02 , F25B2400/0409 , F25B2400/0411 , F25B2400/13 , F25B2600/2507 , F25B2700/02 , F25B2700/1933 , F25B2700/195 , F25B2700/197 , F25B2700/2106 , F25B2700/21152 , F25B2700/21163 , F25B2700/21173
摘要： There is disclosed a vehicle air conditioner capable of preventing or inhibiting deterioration of a vehicle interior heating capability which is caused by frost formation to an outdoor heat exchanger. The vehicle air conditioner includes a compressor 2, an air flow passage 3, a radiator 4, a heat absorber 9, and an outdoor heat exchanger 7, and executes a heating mode in which a refrigerant discharged from the compressor radiates heat in the radiator, is decompressed and then absorbs heat in the outdoor heat exchanger. The vehicle air conditioner includes an accumulator 12 disposed on a suction side of the compressor, and a bypass circuit 24B disposed from a refrigerant outlet side of the radiator to an inlet side of the accumulator. A controller has a mode in which the refrigerant flowing out from the radiator is passed through the bypass circuit, does not flow through the outdoor heat exchanger, but flows into the accumulator.
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9.发明授权公开(公告)号：US09878595B2
公开(公告)日：2018-01-30
申请号：US14441128
申请日：2013-11-11
发明人： Ryo Miyakoshi , Kenichi Suzuki , Kouhei Yamashita
CPC分类号： B60H1/3213 , B60H1/00385 , B60H1/00921 , B60H1/00978 , B60H1/3207 , B60H2001/00957 , F25B41/04 , F25B49/027
摘要： There is disclosed a vehicle air conditioner which can realize a desirable outlet temperature even when a refrigerant subcool degree of a radiator varies. A controller executes a heating mode to let a refrigerant discharged from a compressor 2 radiate heat in a radiator 4, decompress the refrigerant by which heat has been radiated, and then let the refrigerant absorb heat in an outdoor heat exchanger 7, thereby heating the vehicle interior. The controller controls the compressor 2 on the basis of a radiator target pressure, and corrects the radiator target pressure in such a direction as to heighten when a target subcool degree enlarges, on the basis of the target subcool degree (the refrigerant subcool degree) of the radiator 4.
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10.发明授权公开(公告)号：US09796247B2
公开(公告)日：2017-10-24
申请号：US14441303
申请日：2013-11-11
CPC分类号： B60H1/3213 , B60H1/00921
摘要： A vehicle air conditioner which can enlarge an effective range of a dehumidifying and cooling mode to realize comfortable air condition in a vehicle interior. A controller changes and executes at least one of a heating mode, a dehumidifying and heating mode, a dehumidifying and cooling mode, and a cooling mode. In at least the dehumidifying and cooling mode, the controller controls a capability of a compressor (2) on the basis of a temperature of a heat absorber (9), and controls a valve position of an outdoor expansion valve (6) on the basis of a temperature or a pressure of the radiator (4), and executes a radiator temperature prior mode to enlarge the capability of the compressor (2), in a case where heat radiation in the radiator (4) runs short.
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