公开(公告)号：US20190241044A1

公开(公告)日：2019-08-08

申请号：US16390234

申请日：2019-04-22

Applicant: DENSO CORPORATION

Inventor： Satoshi ITO ,  Atsushi INABA

IPC: B60H1/00 ,  F25B1/00 ,  F25B13/00 ,  F25B39/00 ,  B60H1/22

CPC classification number: B60H1/00899 ,  B60H1/00021 ,  B60H1/00392 ,  B60H1/00485 ,  B60H1/00821 ,  B60H1/00885 ,  B60H1/00907 ,  B60H1/00921 ,  B60H1/22 ,  B60H1/32 ,  B60H2001/00935 ,  F25B1/00 ,  F25B13/00 ,  F25B39/00

Abstract: A refrigerant cycle provides a heat pump cycle apparatus. An outdoor heat exchanger, a control valve, and a refrigerant container are arranged in series in this order. The outdoor heat exchanger provides a passage in which a passage cross-sectional area of the refrigerant changes. When the outdoor heat exchanger is used as a condenser, the flow direction of the refrigerant is a direction in which the passage cross-sectional area becomes relatively small. When the outdoor heat exchanger is used as an evaporator, the flow direction of the refrigerant is a direction in which the passage cross-sectional area becomes relatively large. In both flow directions, the refrigerant container acts as a receiver.

公开(公告)号：US20250164163A1

公开(公告)日：2025-05-22

申请号：US19034345

申请日：2025-01-22

Applicant: DENSO CORPORATION

Inventor： Satoshi ITO ,  Hiroyuki KOBAYASHI ,  Takeru KANAZAWA

IPC: F25B41/31

Abstract: A refrigeration cycle device includes a compressor, a radiator, an expansion valve, an evaporator and a controller controlling an opening degree of the expansion valve. The controller determines an increase/decrease amount of the opening degree of the expansion valve, to a first amount, when a superheat degree of the refrigerant flowing out from the evaporator is equal to or lower than a predetermined superheat degree. In addition, the controller determines the increase/decrease amount of the opening degree of the expansion valve, to a second amount that is set to more suppress an increase of the superheat degree of the refrigerant flowing out from the evaporator, than that of the first amount, when the superheat degree of the refrigerant flowing out from the evaporator is higher than the predetermined superheat degree.

公开(公告)号：US20240337420A1

公开(公告)日：2024-10-10

申请号：US18745661

申请日：2024-06-17

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masanari NUMATA ,  Yu OFUNE ,  Satoshi ITO ,  Naoki KATO ,  Nobuharu KAKEHASHI ,  Tatsuhito MATSUMOTO ,  Kaoru OHTSUKA ,  Yasuhiro OI ,  Hidefumi AIKAWA ,  Ryo MICHIKAWAUCHI

IPC: F25B30/02 ,  F25B49/02

CPC classification number: F25B30/02 ,  F25B49/02

Abstract: A heat pump system includes a heat pump cycle, a heating unit, a low-temperature side heat medium circuit, and a control unit. The heat pump cycle includes a compressor, a condenser, and an evaporator. The heating unit heats ventilation air with heat released form refrigerant in the condenser. The low-temperature side heat medium circuit circulates a low-temperature side heat medium such that the refrigerant in the evaporator absorbs heat of the low-temperature side heat medium, and includes a heat source device and a heat amount adjustment unit. The control unit causes an amount of heat transfer in the heating unit for heating the ventilation air to approach a predetermined target value via adjustment in temperature of the low-temperature side heat medium by controlling a rotation speed of the compressor and an operation of at least one of the heat source device and the heat amount adjustment unit.

公开(公告)号：US20210101451A1

公开(公告)日：2021-04-08

申请号：US17125387

申请日：2020-12-17

Applicant: DENSO CORPORATION

Inventor： Hiroyuki KOBAYASHI ,  Satoshi ITO ,  Yuichi KAMI ,  Kengo SUGIMURA

IPC: B60H1/32 ,  F25B49/02

Abstract: A first evaporator cools air-conditioning air. A second evaporator cools an object. A first orifice unit and a second orifice unit are capable of changing a refrigerant amount of the first evaporator and the second evaporator, respectively. A control unit controls both the first orifice unit and the second orifice unit so that a temperature of the second evaporator approaches a target temperature. The control unit, in a first mode, performs control not to evaporate a refrigerant at the first evaporator and to evaporate the refrigerant at the second evaporator. The control unit, in a second mode, performs control to evaporate the refrigerant at both the first evaporator and the second evaporator. The control unit sets the target temperature in a first mode higher than that in a second mode.

公开(公告)号：US20190128569A1

公开(公告)日：2019-05-02

申请号：US16225444

申请日：2018-12-19

Applicant: DENSO CORPORATION

Inventor： Kazuhiro TADA ,  Hiroya HASEGAWA ,  Satoshi ITO ,  Mikiharu KUWAHARA

IPC: F25B9/08 ,  F25B41/00 ,  F25B41/04 ,  F25B49/02

Abstract: An ejector refrigeration circuit includes a compressor, a heating heat exchanger, a first decompressor, an exterior heat exchanger, a second decompressor, a cooling heat exchanger, a heating ejector, a heating-side gas-liquid separator, and a refrigerant circuit switch. The refrigerant circuit switch switches between a refrigerant circuit in a first dehumidifying-heating mode and a refrigerant circuit in a second dehumidifying-heating mode. A flow direction of the refrigerant through the exterior heat exchanger in the first dehumidifying-heating mode is the same as a flow direction of the refrigerant through the exterior heat exchanger in the second dehumidifying-heating mode. The flow direction of the refrigerant through the exterior heat exchanger in the first dehumidifying-heating mode is different from a flow direction of the refrigerant through the exterior heat exchanger in the heating mode.