To secure a heating capability of heat absorbing/heating even when frost is formed on an external heat exchange part.SOLUTION: A vehicular air conditioner is provided with: a refrigerant circuit including a compressor, an indoor heat exchange part and an external heat exchange part; an air conditioning unit in which the indoor heat exchange part is arranged in an air circulation passage; and a control device that controls the refrigerant circuit and the air conditioning unit. The refrigerant circuit has a hot gas bypass that decompresses at least a portion of a refrigerant compressed by the compressor and returns the portion to the compressor without going through the indoor heat exchange part and the external heat exchange part. The control device can execute heat absorbing/heating operation by which the refrigerant is allowed to absorb heat in the external heat exchange part and heat of the portion of the refrigerant compressed by the compressor is radiated in the indoor heat exchange part to heat a vehicle interior, which when detecting frost formed on the external heat exchange part, during the heat absorbing/heating operation, flows the portion of the refrigerant compressed by the compressor to the hot gas bypass.SELECTED DRAWING: Figure 2
【課題】外部熱交換部が着霜した状態であっても吸熱暖房の暖房能力を確保する。【解決手段】車両用空調装置は、圧縮機、室内熱交換部、及び、外部熱交換部を含む冷媒回路と、室内熱交換部を空気流通路に配置した空調ユニットと、冷媒回路及び空調ユニットを制御する制御装置と、を備え、冷媒回路は、圧縮機で圧縮した冷媒の少なくとも一部を、室内熱交換部及び外部熱交換部を経由することなく減圧して圧縮機に戻すホットガスバイパスを有し、制御装置は、外部熱交換部において冷媒に吸熱させ、圧縮機で圧縮した冷媒の一部を室内熱交換部で放熱させて車室内を暖房する吸熱暖房運転を実行可能であり、吸熱暖房運転中に、外部熱交換部への着霜を検出した場合に、圧縮機で圧縮した冷媒の一部をホットガスバイパスに流す。【選択図】図2
VEHICULAR AIR CONDITIONER
車両用空調装置
10.05.2024
Patent
Elektronische Ressource
Japanisch
IPC: | 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 / F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS |
VEHICULAR AIR CONDITIONER AND VEHICLE HAVING VEHICULAR AIR CONDITIONER
Europäisches Patentamt | 2019
|