The invention discloses a CO2 heat pump system refrigerant leakage control method and a heat pump system.The control method comprises the steps that when the CO2 heat pump system does not operate, a CO2 concentration change value and a CO2 concentration value are obtained; according to the CO2 concentration change value and the CO2 concentration value, whether a CO2 leakage protection mode is started or not is judged; and if it is judged that the system enters the CO2 leakage protection mode, all refrigerant loop valves in the system are closed, conventional fresh air ventilation treatment is carried out, and the conventional fresh air ventilation treatment is stopped and the CO2 leakage protection mode is quitted until the CO2 concentration value is lower than a fourth concentration threshold value. According to the embodiment of the invention, the life safety of people in the vehicle can be fully ensured under the limit condition of CO2 refrigerant leakage; and subsequent leakage point locking can be facilitated, CO2 concentration detection, CO2 heat pump system leakage protection and leakage point positioning are combined, the CO2 leakage amount is reduced, and system safety is protected in time.

    本发明公开了一种CO2热泵系统冷媒泄露控制方法及热泵系统,控制方法包括:在CO2热泵系统未运行时,获取CO2浓度变化值和CO2浓度值;根据CO2浓度变化值和CO2浓度值,判断是否进入CO2泄露保护模式;若判定进入CO2泄露保护模式,则关闭系统内所有冷媒回路阀门,且进行常规新风通风处理,直至CO2浓度值低于第四浓度阈值,则停止常规新风通风处理,退出CO2泄露保护模式。本发明实施例可以在CO2冷媒泄露的极限情况下,充分保证车内人员生命安全;还可方便后续泄漏点锁定,实现CO2浓度检测与CO2热泵系统泄露保护和泄漏点定位结合,既减少CO2的泄露量,还及时保护系统安全。


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    Title :

    CO2 heat pump system refrigerant leakage control method and heat pump system


    Additional title:

    一种CO2热泵系统冷媒泄露控制方法及热泵系统


    Contributors:
    LIN JINHAO (author) / DANG HUA (author)

    Publication date :

    2023-10-31


    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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