公开(公告)号：US12140353B2

公开(公告)日：2024-11-12

申请号：US17576030

申请日：2022-01-14

Applicant: DENSO CORPORATION

Inventor： Kouji Inagaki ,  Daiki Katou ,  Hiroaki Kawano ,  Yoshiki Katoh ,  Naoya Makimoto

IPC: F25B41/31 ,  F25B5/02

Abstract: A refrigeration cycle device includes a compressor configured to compress and discharge a refrigerant containing oil, a refrigerant radiator configured to heat the ventilation air using the refrigerant discharged from the compressor as a heat source during a room interior heating, a refrigerant decompression unit configured to decompress the refrigerant having passed through the refrigerant radiator, an evaporator configured to evaporate the refrigerant and to function as a heat absorber during the room interior heating; and a controller configured to control the refrigerant decompression unit and to perform a fluctuation operation at least during the room interior heating. In the fluctuation operation, a throttle opening degree of the refrigerant decompression unit is changed such that a refrigerant state on a refrigerant outlet side of the evaporator is alternately changed to a superheated state having a superheat degree and a wet state containing the wet vapor.