To collect refrigerants staying in a refrigerant heat medium heat exchanger beforehand to secure amounts of refrigerants for subsequent air-conditioning operation, even when the refrigerant heat medium heat exchanger is installed in a refrigerant circuit that performs hot gas heating operation.SOLUTION: A vehicular air conditioner is provided with a control device that controls a refrigerant circuit, a heat medium circuit and an air conditioning unit, where the refrigerant circuit has a hot gas bypass that decompresses at least a portion of a refrigerant compressed by a compressor and returns the portion to the compressor without going through an indoor heat exchange part and an external heat exchange part. The control device can execute hot gas heating operation by which the refrigerant is prevented from absorbing 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 determines whether or not the refrigerant needs to be collected from a refrigerant heat medium heat exchanger, and when determining that the refrigerant needs to be collected, performs a refrigerant collecting process for collecting the refrigerant from the refrigerant heat medium heat exchanger before or after executing the hot gas heating operation.SELECTED DRAWING: Figure 6
【課題】ホットガス暖房運転を行う冷媒回路に冷媒熱媒体熱交換器が設けられている場合であっても、事前に冷媒熱媒体熱交換器に溜った冷媒を回収して、次回の空調運転の冷媒量を確保する。【解決手段】車両用空調装置は、冷媒回路と熱媒体回路と空調ユニットを制御する制御装置を備え、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ず、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ホットガス暖房運転を実行可能であり、冷媒熱媒体熱交換器からの冷媒回収の要否を判断し、冷媒回収が必要な場合には、ホットガス暖房運転の実行前又は実行後に冷媒熱媒体熱交換器から冷媒を回収する冷媒回収処理を行う。【選択図】図6
VEHICULAR AIR CONDITIONER
車両用空調装置
2024-05-10
Patent
Electronic Resource
Japanese
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 |
VEHICULAR AIR CONDITIONER AND VEHICLE HAVING VEHICULAR AIR CONDITIONER
European Patent Office | 2019
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