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公开(公告)号：US11117445B2
公开(公告)日：2021-09-14
申请号：US16420257
申请日：2019-05-23
Applicant: DENSO CORPORATION
Inventor： Tatsuro Kyuto , Hiroyuki Kobayashi , Yoshiharu Endo
Abstract: A vehicle air conditioning device includes a compressor, a radiator, an outside heat exchanger, an evaporator, a first decompressor, a second decompressor, a switching portion, and a controller. The radiator exchanges heat between a refrigerant discharged from the compressor and air. The outside heat exchanger exchanges heat between outside air and the refrigerant flowing out of the radiator. The evaporator is exchanges heat between the refrigerant flowing out of the outside heat exchanger and the air flowing through the radiator. The switching portion switches between a series dehumidifying-heating mode and a parallel dehumidifying-heating mode. The controller is configured to control the switching portion to switch from the parallel dehumidifying-heating mode to the series dehumidifying-heating mode when the amount of the refrigerant oil flowing from the outside heat exchanger to the compressor is insufficient in the parallel dehumidifying-heating mode.
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公开(公告)号：US10933717B2
公开(公告)日：2021-03-02
申请号：US16288476
申请日：2019-02-28
Applicant: DENSO CORPORATION
Inventor： Hiroyuki Kobayashi
Abstract: A refrigeration cycle device has a cooling heat exchanger, an evaporation-pressure control valve, an inside-air ratio adjuster, and a controller. The evaporation-pressure control valve controls an evaporation pressure of a refrigerant in the cooling heat exchanger. The inside-air ratio adjuster changes a ratio of an inside air to an entire volume of the air exchanging heat with the refrigerant in the cooling heat exchanger. The controller controls the inside-air ratio adjuster. The evaporation-pressure control valve increases the evaporation pressure of the refrigerant as a flow rate of the refrigerant flowing through the evaporation-pressure control valve increases. The controller, in a first mode, increases the ratio of the inside air as an evaporation temperature of the refrigerant in the cooling heat exchanger falls.
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Patent Agency Ranking
公开(公告)号：US10000108B2
公开(公告)日：2018-06-19
申请号：US14783963
申请日：2014-04-09
Applicant: DENSO CORPORATION
Inventor： Hiroyuki Kobayashi , Atsushi Yamada
CPC classification number: B60H1/3223 , B60H1/00921 , B60H1/3213 , F25B5/04 , F25B6/04 , F25B40/00 , F25B49/02 , F25B2341/0662 , F25B2400/23 , F25B2600/2509 , F25B2600/2513 , F25B2700/195 , F25B2700/21163
Abstract: A refrigeration cycle device includes an interior condenser that exchanges heat between a high-pressure refrigerant and ventilation air to heat the ventilation air, an exterior heat exchanger that exchanges heat between outside air and the refrigerant downstream of the interior condenser, an interior evaporator that exchanges heat between a low-pressure refrigerant downstream of the exterior heat exchanger and the ventilation air before passing through the interior condenser, and an internal heat exchanger that exchanges heat between the refrigerant flowing out of the exterior heat exchanger and the refrigerant flowing out of the interior evaporator. The refrigeration cycle device further includes a gas-liquid separator that separates the refrigerant at a downstream side of the interior condenser into gas and liquid phase refrigerants. In a dehumidification heating mode of evaporating the refrigerant at the exterior heat exchanger, the liquid-phase refrigerant separated by the gas-liquid separator flows into the exterior heat exchanger.
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公开(公告)号：US11525611B2
公开(公告)日：2022-12-13
申请号：US17110641
申请日：2020-12-03
Applicant: DENSO CORPORATION
Inventor： Kengo Sugimura , Satoshi Ito , Yuichi Kami , Hiroyuki Kobayashi
Abstract: A refrigerant cycle device includes a compressor, a radiator, a first expansion valve, a second expansion valve, a first evaporator, a second evaporator, and a controller. The controller is configured to switch between a first evaporator priority control and a second evaporator priority control. During the first evaporator priority control, the controller controls a throttle opening of the second expansion valve based on at least one of a temperature of a first evaporator, a temperature of a refrigerant flowing through the first evaporator, and a temperature of an air having exchanged heat in the first evaporator. During the second evaporator priority mode, the controller controls the throttle opening based on a refrigerant state of the second evaporator. When the at least one of the temperatures is equal to or greater than a switching temperature, the second priority mode is switched to the first priority mode.
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公开(公告)号：US11506404B2
公开(公告)日：2022-11-22
申请号：US17110058
申请日：2020-12-02
Applicant: DENSO CORPORATION
Inventor： Satoshi Ito , Kengo Sugimura , Yuichi Kami , Hiroyuki Kobayashi
Abstract: A refrigeration cycle device includes a heating unit, an air-heating expansion valve, an outdoor heat exchanger, an air-cooling expansion valve, an indoor evaporator, and a cooler-unit expansion valve, a cooler unit, and a refrigerant circuit switching unit. In a heating series cooler-unit mode, refrigerant is circulated in order of the heating unit, the air-heating expansion valve, the outdoor heat exchanger, the cooler-unit expansion valve, and the cooler unit. In a heating parallel cooler-unit mode, refrigerant is circulated in order of the heating unit, the air-heating expansion valve, and the outdoor heat exchanger, and refrigerant is circulated in order of the heating unit, the cooler-unit expansion valve, and the cooler unit.
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公开(公告)号：US12038207B2
公开(公告)日：2024-07-16
申请号：US17191487
申请日：2021-03-03
Applicant: DENSO CORPORATION
Inventor： Kazuhiro Tada , Kengo Sugimura , Hiroyuki Kobayashi , Yuichi Kami , Satoshi Ito
Abstract: The refrigeration cycle device includes a compressor, an outside heat exchanger, a cooling pressure reducing unit, an evaporator, a branch portion, a cool down pressure reducing unit, a temperature adjusting unit, a merging portion, a bypass passage, and a first on-off valve. The temperature adjusting unit includes a temperature adjusting heat exchange unit and adjusts a temperature of a temperature adjustment target object. During a cooling and cool down mode, the outside heat exchanger functions as a radiator, and the evaporator and the temperature adjusting heat exchange unit function as heat absorbers. During a target object warm up mode, the refrigerant discharged from the compressor is guided to the temperature adjusting heat exchange unit via the bypass passage, and the heat of the discharged refrigerant is used as a heat source for heating the temperature adjustment target object.
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公开(公告)号：US11718156B2
公开(公告)日：2023-08-08
申请号：US17110086
申请日：2020-12-02
Applicant: DENSO CORPORATION
Inventor： Hiroyuki Kobayashi , Yuichi Kami , Kengo Sugimura , Satoshi Ito
CPC classification number: B60H1/3205 , B60H1/04 , B60H1/323 , B60H1/3223 , B60H1/00278 , B60H2001/325 , B60H2001/3242 , B60H2001/3257
Abstract: A refrigeration cycle device includes a compressor, a radiator, an air-conditioning heat exchanger, a cooling heat exchanger, an air-conditioning decompression unit, a cooler-unit decompression unit, a refrigerant flow rate detector, and a controller. The radiator is configured to radiate heat of refrigerant discharged from the compressor. The air-conditioning heat exchanger absorbs heat from air to evaporate the refrigerant. The cooling heat exchanger is arranged in parallel with the air-conditioning heat exchanger in the flow of refrigerant. The air-conditioning decompression unit adjusts a decompression amount of the refrigerant flowing into the air-conditioning heat exchanger. The cooler-unit decompression unit adjusts a decompression amount of the refrigerant flowing into the cooling heat exchanger. The controller controls the operation of the cooler-unit decompression unit so that the flow rate of the refrigerant detected by the refrigerant flow rate detector exceeds a predetermined reference flow rate.
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