| 摘要 |
The present invention relates to a failure diagnosis device for an electronic expansion valve, and more specifically, to a failure diagnosis device for an electronic expansion valve which detects abnormality of an electronic valve by comparing waveform of a pulse signal, the waveform of a pulse signal generated from a system control board and then transmitted to drive a step motor provided in an electronic expansion valve, with ordinary waveform saved in advance, and transmits such a detected result to an external control device via wired or wireless communications networks or to a smartphone of an after-sales service engineer, thereby a cause of the abnormality of the electronic expansion valve can be accurately and rapidly determined to be an electrical problem or a mechanical problem and follow-up measures can be applied. |
