To provide a vehicular air conditioner configured so that a compressor can be prevented from being driven in a state where pressure of a suctioned refrigerant is high to improve durability of the compressor.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 and a control device that controls the refrigerant circuit. The refrigerant circuit has a hot gas bypass that decompresses at least a portion of a refrigerant compressed by the compressor and returns the refrigerant to the compressor, without going through the indoor heat exchange part and the external heat exchange part, and a flow volume adjusting part that adjusts flow volumes of the refrigerant flowing through the hot gas bypass. The control device can execute a hot gas heating mode in which the portion of the refrigerant compressed by the compressor is flown to the indoor heat exchange part and the other is flown to the hot gas bypass, which when determining that pressure of the refrigerant suctioned in the compressor overshoots, in the hot gas heating mode, controls an aperture of the flow volume adjusting part so that the aperture becomes a preset first aperture that is smaller than a current aperture.SELECTED DRAWING: Figure 1

    【課題】吸入冷媒圧力が高い状態での圧縮機の駆動を防止し、圧縮機の耐久性を向上させる。【解決手段】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、前記冷媒回路を制御する制御装置と、を備えた車両用空調装置において、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と、ホットガスバイパスを流れる冷媒の流量を調整する流量調整部と、を有し、制御装置は、圧縮機で圧縮した冷媒の一部を室内熱交換部に流し、残りをホットガスバイパスに流すホットガス暖房モードを実行可能であり、ホットガス暖房モードにおいて、圧縮機の吸入冷媒圧力がオーバーシュートすると判定した場合に、流量調整部の開度を、現在の開度よりも小さい開度であって、予め設定された第1開度となるように制御する、車両用空調装置を提供する。【選択図】図1


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    Title :

    VEHICULAR AIR CONDITIONER


    Additional title:

    車両用空調装置


    Contributors:

    Publication date :

    2025-01-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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



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