To effectively recover refrigerator oil accumulated in an evaporator.SOLUTION: A refrigeration cycle device comprises: a compressor 11 sucking and compressing a refrigerant, and delivering the compressed refrigerant; heat radiation units 12, 20 and 22 which exchanges heat between the refrigerant delivered from the compressor and air to be supplied to an air-conditioning object and releases the exchanged heat; a first depressurization unit 13 which depressurizes the refrigerant and can close a flow passage of the refrigerant; a first evaporation unit 14 which exchanges heat between the refrigerant depressurized by the first depressurization unit and air, absorbs heat from the air thereby evaporating the refrigerant; a second depressurization unit 16 arranged in parallel with the first depressurization unit in a flow of the refrigerant, and depressurizing the refrigerant; a second evaporation unit 17 causing the refrigerant depressurized by the second depressurization unit to absorb heat thereby evaporating the refrigerant; and a control unit 60 performing oil recovery control for controlling the first decompression portion in such a manner that a flow passage is opened when the first depressurization unit closes the flow passage, and it is determined that refrigerator oil mixed in the refrigerant stays in the first evaporation unit.SELECTED DRAWING: Figure 7
【課題】蒸発器に溜まった冷凍機油を効果的に回収する。【解決手段】冷媒を吸入して圧縮し吐出する圧縮機11と、圧縮機から吐出された冷媒と空調対象空間へ送風される空気とを熱交換させて空気に放熱させる放熱部12、20、22と、冷媒を減圧させるとともに、冷媒の流路を閉じることが可能な第1減圧部13と、第1減圧部で減圧された冷媒と空気とを熱交換させて空気から吸熱させることによって冷媒を蒸発させる第1蒸発部14と、冷媒の流れにおいて第1減圧部と並列に配置され、冷媒を減圧させる第2減圧部16と、第2減圧部で減圧された冷媒に吸熱させることによって冷媒を蒸発させる第2蒸発部17と、第1減圧部が流路を閉じており、且つ冷媒に混入している冷凍機油が第1蒸発部に滞留していると判定された場合、流路を開けるように第1減圧部を制御するオイル回収制御を実行する制御部60とを備える。【選択図】図7
REFRIGERATION CYCLE DEVICE
冷凍サイクル装置
2022-04-15
Patent
Electronic Resource
Japanese
IPC: | F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |