The invention provides a method and device for avoiding dry burning of a PTC water heater, and the method is applied to a vehicle control unit and comprises the steps: receiving a PTC heating request, and obtaining the operation parameters of a water pump and the working parameters of the PTC; the mass of the anti-freezing solution is calculated based on the operation parameters of the water pump, and the heating power of the PTC is calculated based on the working parameters of the PTC; calculating to obtain a theoretical inlet and outlet temperature difference in unit time based on the mass of the anti-freezing solution and the heating power of the PTC; and the actual inlet and outlet temperature difference of the PTC in unit time is obtained, and whether the PTC is in a dry burning state or not is judged based on the theoretical inlet and outlet temperature difference and the actual inlet and outlet temperature difference. According to the invention, the heating state of the PTC can be judged more accurately, and the use effect of the PTC is improved.

    本发明提供了一种避免PTC水加热器干烧的方法及装置,该方法应用于整车控制器,包括:接收PTC加热请求,并获取水泵的运行参数和PTC的工作参数;基于水泵的运行参数计算得到防冻液质量,以及基于PTC的工作参数计算得到PTC的发热功率;基于防冻液质量和PTC的发热功率计算得到单位时间内的理论进出口温度差;获取单位时间内PTC的实际进出口温度差,并基于理论进出口温度差和实际进出口温度差判断PTC是否处于干烧状态。本发明能够更加精确地判断PTC的加热状态,提升PTC的使用效果。


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    Title :

    Method and device for avoiding dry burning of PTC (Positive Temperature Coefficient) water heater


    Additional title:

    避免PTC水加热器干烧的方法及装置


    Contributors:
    YAN QUANZHONG (author) / LI JIECHEN (author)

    Publication date :

    2023-10-03


    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 / F24H FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, IN GENERAL , Erhitzer für flüssige oder gasförmige Stoffe, z.B. Wasser- oder Lufterhitzer mit Vorrichtungen zur Wärmeerzeugung, allgemein



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