The invention discloses a thermal expansion valve fault diagnosis method and system and a controller, and the method comprises the steps: judging whether a relation value between parameters collected by a first sensor at a refrigerant inflow end of a thermal expansion valve and a second sensor at a refrigerant outflow end of the thermal expansion valve meets a preset condition or not; whether the thermostatic expansion valve is blocked or not can be determined without depending on connection and disconnection of a low-pressure pressure switch, the first sensor and the second sensor are close to the thermostatic expansion valve, and parameters detected by the sensors can be sent to corresponding controllers in time. The controller can obtain the state information of the thermostatic expansion valves in time through the sensors, in addition, due to the fact that the sensors are arranged at the two ends of the thermostatic expansion valves, parameters obtained by the controller are more comprehensive and accurate, the state of each thermostatic expansion valve can be reflected in time and accurately, the refrigerating or heating effect of the air conditioner is guaranteed, and the service life of the air conditioner is prolonged. And the comfort of the user is ensured.

    本申请公开一种热力膨胀阀故障诊断方法、系统及控制器,所述方法根据热力膨胀阀制冷剂流入端的第一传感器和热力膨胀阀制冷剂流出端的第二传感器采集的参数之间的关系值是否满足预设条件,即可确定该热力膨胀阀是否出现堵塞故障,不再依赖低压压力开关的导通和断开来判断热力膨胀阀是否出现故障,并且第一传感器和第二传感器距离热力膨胀阀近,传感器检测到的参数可以及时发送至相应控制器,控制器可以通过传感器及时获取热力膨胀阀的状态信息,另外,由于热力膨胀阀两端都有传感器,所以控制器获得的参数更加全面且准确,从而能够及时且准确的反映每个热力膨胀阀的状态,以保障空调制冷或制热效果,进而保障用户的舒适性。


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    Title :

    Thermal expansion valve fault diagnosis method, system and controller


    Additional title:

    热力膨胀阀故障诊断方法、系统及控制器


    Contributors:

    Publication date :

    2024-02-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES / F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS / G01K MEASURING TEMPERATURE , Messen der Temperatur



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