A heat pump vehicle air conditioning system passes hot gas to a condenser and a vaporizer for the vehicle cabin exterior. Even with low outside air temperature, it can efficiently defrost using the cooling cycle. The system includes a cabin-interior condenser downstream of a cabin-interior vaporizer within an HVAC unit connected via refrigerant switching means to a cooling cycle. Cooling is accomplished by a compressor, cabin-exterior condenser, first decompression unit with on-off valve function, the cabin-interior vaporizer, and an accumulator. A cabin-exterior vaporizer disposed outside of the vehicle cabin is connected with a second decompression unit via an on-off valve function and to the exit-side liquid refrigerant pipe of the cabin-exterior condenser. A bypass circuit having a third decompression unit with on-off function is connected between the accumulator and the exit-side liquid refrigerant pipe of the cabin-exterior condenser.


    Access

    Download


    Export, share and cite



    Title :

    Heat-pump-type vehicle air conditioning system and defrosting method thereof


    Contributors:

    Publication date :

    2018-08-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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



    HEAT-PUMP-TYPE VEHICLE AIR CONDITIONING SYSTEM AND DEFROSTING METHOD THEREOF

    MORISHITA MASATOSHI / ISHIDA TOSHIYUKI | European Patent Office | 2016

    Free access

    Vehicle heat pump with defrosting mode

    HAMAMOTO HIROSHI / FUKAWATASE KOHEI / OTAKE YOSHIHIKO et al. | European Patent Office | 2018

    Free access

    Electric automobile heat storage defrosting heat pump system and defrosting method

    WANG SHUANG / YONG ANJIAO / LIN LINI et al. | European Patent Office | 2022

    Free access

    Vehicle heat pump defrosting method and device and vehicle

    CHEN MING / ZHAO LINCHEN | European Patent Office | 2024

    Free access

    Defrosting device, air conditioning system and vehicle

    ZHANG YINGYING / CHEN CHONG / LING XUEFENG | European Patent Office | 2022

    Free access