公开(公告)号：US12215903B2

公开(公告)日：2025-02-04

申请号：US17947935

申请日：2022-09-19

Applicant: DENSO CORPORATION

Inventor： Tatsurou Kyuto ,  Yasuhiro Yokoo ,  Yoshinori Yanagimachi

IPC: F25B41/20 ,  F25B5/02 ,  F25B43/02

Abstract: A refrigeration cycle device includes: a switching valve configured to switch between a battery mode in which refrigerant flows to a battery heat exchanger and a non-battery mode in which the refrigerant bypasses the battery heat exchanger; and a controller controlling a compressor and the switching valve. The controller includes an estimation unit configured to estimate an oil stagnation amount, which is an amount of lubricating oil accumulated in the battery heat exchanger in accordance with execution of the non-battery mode. The controller includes a determination unit configured to determine whether lubricating oil in the battery heat exchanger needs to be recovered on the basis of the oil stagnation amount. The controller includes an execution unit configured to execute an oil recovery mode for recovery of lubricating oil in the battery heat exchanger when the determination unit determines that lubricating oil needs to be recovered.

公开(公告)号：US12043090B2

公开(公告)日：2024-07-23

申请号：US17509684

申请日：2021-10-25

Applicant: DENSO CORPORATION

Inventor： Tatsurou Kyuto

IPC: B60H1/32 ,  B60H1/00 ,  F25B1/00 ,  F25B6/04 ,  F25B39/00 ,  F25B39/04 ,  F25B41/00 ,  F25B41/40 ,  F28F9/02

CPC classification number: B60H1/3228 ,  B60H1/00328 ,  B60H1/00485 ,  B60H1/00899 ,  B60H1/00921 ,  B60H1/3227 ,  F25B1/00 ,  F25B6/04 ,  F25B39/00 ,  F25B39/04 ,  F25B41/00 ,  F28F9/02 ,  B60H1/00807 ,  F25B41/40

Abstract: An outdoor heat exchanger is installed in a refrigerant circuit and has a heat exchange core portion providing refrigerant flow paths different in a cooling operation and a heating operation. A flow path switching device switches the flow path of the refrigerant in the heat exchange core portion of the outdoor heat exchanger between a cooling mode flow path during the cooling operation and a heating mode flow path during the heating operation. The refrigerant flows down in one direction in the heating mode flow path. The refrigerant flows in one direction and then flows down in an opposite direction in the cooling mode flow path.