The invention provides a method and device for determining refrigerant insufficiency of a vehicle-mounted air conditioner and a vehicle. The method comprises the steps that under the condition that the temperature outside the vehicle is larger than the temperature inside the vehicle, the vehicle-mounted air conditioner is controlled to enter a refrigeration mode, the temperature outside the vehicle is the environment temperature outside the vehicle where the vehicle-mounted air conditioner is located, and the refrigerant insufficiency is determined; the in-vehicle temperature is the environment temperature in the vehicle where the vehicle-mounted air conditioner is located; under the condition that the running duration of the vehicle-mounted air conditioner in the refrigeration mode reaches the first preset duration, the superheat degree, the saturation temperature difference, the opening degree of an electronic expansion valve of the vehicle-mounted air conditioner and the supercooling degree are obtained, and the saturation temperature difference is the difference value between the saturation temperature corresponding to the evaporation pressure of an evaporator of the vehicle-mounted air conditioner and the target saturation temperature; under the condition that at least two of the superheat degree, the saturation temperature difference, the opening degree of the electronic expansion valve and the supercooling degree are within the corresponding preset ranges, it is determined that the refrigerant of the vehicle-mounted air conditioner is insufficient, and the problem that in the prior art, the refrigerant of the vehicle-mounted air conditioner is judged to be insufficient according to experience, and consequently misjudgment is frequent is solved.

    本申请提供了一种车载空调的冷媒不足的确定方法、装置和车辆,该方法包括:在车外温度大于车内温度的情况下,控制车载空调进入制冷模式,车外温度为车载空调所在车辆的外部的环境温度,车内温度为车载空调所在车辆的内部的环境温度;在车载空调处于制冷模式的运行时长达到第一预定时长的情况下,获取过热度、饱和温差、车载空调的电子膨胀阀的开度和过冷度,饱和温差为车载空调的蒸发器的蒸发压力对应的饱和温度与目标饱和温度的差值;在过热度、饱和温差、电子膨胀阀的开度和过冷度中至少两个在对应的预定范围内的情况下,确定车载空调的冷媒不足,解决了现有技术中凭经验判断车载空调的冷媒不足导致误判频繁的问题。


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    Title :

    Method and device for determining insufficient refrigerant of vehicle-mounted air conditioner and vehicle


    Additional title:

    车载空调的冷媒不足的确定方法、装置和车辆


    Contributors:
    WANG RUIQIANG (author) / TAN FENG (author) / TANG LEI (author) / CHEN RONGBIN (author)

    Publication date :

    2023-06-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    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



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