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公开(公告)号：US20240271844A1
公开(公告)日：2024-08-15
申请号：US18642281
申请日：2024-04-22
Applicant: DENSO CORPORATION
Inventor： Yuichi KAMI , Kota TAKEICHI
CPC classification number: F25B49/02 , F25B30/02 , F25B41/20 , F25B2400/04
Abstract: A heat pump cycle device includes a compressor, a branch part, a heating unit, a heating-unit side decompression unit, a bypass passage, a bypass flow rate adjustment unit, a mixing part, a target temperature determination part configured to determine a target temperature that is a target value of an object temperature of the heating object heated by the heating unit, and a target low-pressure determination part configured to determine a target low pressure that is a target value of a sucked refrigerant pressure of the refrigerant to be sucked into the compressor. When the object temperature is lower than the target temperature during execution of a hot gas mode, a high-pressure rise control is performed to raise a discharged refrigerant pressure of the refrigerant flowing into the heating unit.
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公开(公告)号：US20170211857A1
公开(公告)日：2017-07-27
申请号：US15500646
申请日：2015-07-27
Applicant: DENSO CORPORATION
Inventor： Kota TAKEICHI , Yoshiaki TAKANO , Haruyuki NISHIJIMA , Yoshiyuki YOKOYAMA
CPC classification number: F25B39/00 , B60H1/3227 , B60H2001/3298 , F25B31/002 , F25B39/02 , F25B41/00 , F25B2341/0011 , F25B2341/0012 , F25B2400/23 , F28D1/0435 , F28D1/053 , F28D1/05391 , F28D2021/0071 , F28D2021/0085 , F28F9/02 , F28F9/0204 , F28F9/22
Abstract: An evaporator includes an inlet side space of a leeward side upper tank into which a refrigerant flows from a refrigerant inlet port, and an inlet side turn path that is formed of a group of tubes and connected to the inlet side space. A ratio of a total passage cross-sectional area AT1 of the group of tubes forming the inlet side turn path to an inlet passage cross-sectional area Ain of the refrigerant inlet port is set at 3.5 or less, and a ratio of a longitudinal direction length Lg1 of the inlet side space to an inlet equivalent diameter Din of the refrigerant inlet port is set at 25 or less. Further, a Reynolds number Re of the refrigerant that has flowed into the inlet side turn path is set at 1800 or more.
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公开(公告)号：US20240361050A1
公开(公告)日：2024-10-31
申请号：US18732258
申请日：2024-06-03
Applicant: DENSO CORPORATION
Inventor： Kengo SUGIMURA , Yuichi KAMI , Kota TAKEICHI
CPC classification number: F25B30/02 , F25B49/02 , F25B2400/04
Abstract: A heat pump cycle device includes a compressor, a branch portion, a heating unit, a heating-unit side decompression unit, a bypass passage, a bypass-side flow-rate regulating unit, a mixing portion, and a target temperature determination unit. When a regulating performance determination unit determines that a flow rate regulating performance of one of the heating-unit side decompression unit or the bypass-side flow-rate regulating unit is equal to or less than the reference regulating performance, a throttle opening of the other of the heating-unit side decompression unit or the bypass-side flow-rate regulating unit is set to be equal to or less than an upper limit opening.
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公开(公告)号：US20240219086A1
公开(公告)日：2024-07-04
申请号：US18602846
申请日：2024-03-12
Applicant: DENSO CORPORATION
Inventor： Kota TAKEICHI , Atsushi INABA , Yuichi KAMI , Kengo SUGIMURA , Daiki KATO
Abstract: A heat pump cycle device includes a compressor, a branching unit, a heating unit, a heating-unit-side depressurizing unit, a bypass passage, a bypass flow-rate adjusting unit, a mixing unit, and a target pressure difference determining unit. The target pressure difference determining unit determines a target pressure difference as a target value of a pressure difference determined by subtracting a suctioned refrigerant pressure from a discharge refrigerant pressure. An operation of at least one of the compressor, the heating-unit-side depressurizing unit, or the bypass flow-rate adjusting unit is controlled so that the pressure difference comes close to the target pressure difference.
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