Abnormality detection method, abnormality detection device, electric appliance and readable storage medium

The invention discloses an anomaly detection method, an anomaly detection device, an electric appliance and a nonvolatile computer readable storage medium. The method comprises the following steps: acquiring the operation power of an electric appliance with the operation duration within a preset duration interval, and determining a basic deviation ratio according to the operation power and a preset power threshold value; determining a current deviation rate according to the current power of the electric appliance and a preset power threshold; and performing anomaly detection based on the deviation between the current deviation rate and the basic deviation rate to determine an anomaly detection result. The preset duration interval can be set according to the preset duration corresponding to the working performance of the electric appliance in the reasonable range, so that the basic deviation rate can be understood as the allowable deviation rate of the electric appliance. It can be understood that when the deviation shows that the difference between the current deviation rate and the basic deviation rate is large, it can be confirmed that the working performance of the electric appliance is abnormal at the moment. Therefore, the working performance of the electric appliance can be monitored at any time in the operation process of the electric appliance, so that the abnormal information of the working performance of the electric appliance can be obtained in time.