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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
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.
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公开(公告)号：US20240239158A1
公开(公告)日：2024-07-18
申请号：US18413746
申请日：2024-01-16
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , DENSO CORPORATION
Inventor： Ryo MICHIKAWAUCHI , Hidefumi AIKAWA , Masanari NUMATA , Yu OFUNE , Satoshi ITO , Naoki KATO , Tatsuhito MATSUMOTO
CPC classification number: B60H1/32284 , B60H1/00278 , B60H2001/00307 , B60H1/323 , B60H2001/3255 , B60H2001/3285
Abstract: A system includes a refrigeration circuit, low-temperature circuit and controller. The refrigeration circuit includes: a tiller for absorbing heat from a colling water to a refrigerant; and a condenser for releasing heat from the refrigerant to an outside, and realizes a refrigeration cycle by circulating the refrigerant therethrough. The low-temperature circuit includes the tiller and an external heat exchanger for absorbing heat from an outside to the first heat medium, and circulate the cooling water therethrough. The controller can change a heat absorption amount of the refrigerant at the tiller. The controller controls the device so that a change in the heat absorption amount of the refrigerant at the first heat exchanger in accordance with a change in a temperature of the first heat medium is reduced, if the temperature of the cooling water flowing through the first heat exchanger changes by a reference value or more.
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公开(公告)号：US20240239157A1
公开(公告)日：2024-07-18
申请号：US18407988
申请日：2024-01-09
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , DENSO CORPORATION
Inventor： Ryo MICHIKAWAUCHI , Hidefumi AIKAWA , Masanari NUMATA , Yu OFUNE , Satoshi ITO , Naoki KATO , Tatsuhito MATSUMOTO
CPC classification number: B60H1/3228 , B60H1/00899
Abstract: A system includes: a low-temperature circuit having a chiller and in which a cooling water circulates therethrough; a heat dissipation unit for dissipating heat to an air; a refrigeration circuit in which a refrigerant circulates and for absorbing heat from the cooling water to the refrigerant at the chiller and dissipating heat from the refrigerant at the heat dissipation unit; a ratio adjusting device for adjusting a heat dissipation unit passing ratio; and a controller for controlling an heat transfer amount adjusting apparatus capable of adjusting the heat transfer amount in the refrigeration circuit and the ratio adjusting device. If it is predicted that the temperature of the cooling water decreases, the controller controls the apparatus so that the heat transfer amount is increased and controls the ratio adjusting device so that the ratio is decreased, before the temperature of the cooling water flowing through the chiller decreases.
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公开(公告)号：US20230070430A1
公开(公告)日：2023-03-09
申请号：US17847519
申请日：2022-06-23
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Ryo MICHIKAWAUCHI , Hidefumi AIKAWA , Tatsuhito MATSUMOTO
IPC: B60H1/00
Abstract: A refrigerant circuit system includes a compressor configured to compress refrigerant, a condenser configured to cause the compressed refrigerant to radiate heat, first and second evaporators each configured to decompress and expand the heat-radiated refrigerant by regulating a valve opening degree, first and second evaporators provided in parallel and configured to cause the refrigerant, respectively decompressed and expanded by the first and second expansion valves, to absorb heat, and a controller configured to, based on first information related to a temperature of a first temperature regulated object, regulated by the first evaporator, second information related to a temperature of a second temperature regulated object, regulated by the second evaporator, and third information related to a degree of superheat of the refrigerant at an inlet of the compressor, control the valve opening degrees of the first and second expansion valves and a compression ratio of the refrigerant by the compressor.
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