A method and detection system for detecting abnormal driving of washing machine

Abstract

The invention discloses a method for detecting driving abnormity of a washing machine. The method comprises the following steps: judging the working state of the washing machine through a detection system; if the washing machine is in a washing or rinsing state, detecting the water level change through a water level detection device of the detection system and acquiring the water level change amount delta a in the process that a motor is powered on, comparing the water level change amount delta a with a water level change comparison amount A through a comparison module of the detection system, and if delta a is less than or equal to A, transmitting a motor driving abnormity signal; if the washing machine is in a dewatering state, in the process that the motor is powered on, detecting through a vibration amount detection device of the detection system so as to obtain a vibration amount delta b, comparing the vibration amount delta b with a vibration comparison amount B through the comparison module of the detection system, and if delta b is less than or equal to B, transmitting a motor driving abnormity signal. By adopting the method, the motor driving abnormity situation of the washing machine in the washing, rinsing and dewatering states can be simply and effectively detected.

Description

technical field [0001] The invention relates to the detection of the abnormal operation of the washing machine, in particular to the detection of the abnormality of the motor drive in the washing machine in which the drum is driven by the motor-driven belt and the pulsator rotates. Background technique [0002] In the existing washing machines, the more common driving method is to drive the motor to drive the barrel or the pulsator to rotate through the belt. When the washing machine adopts this driving method, the belt may fall off or break and cause the motor to idle; or, If the bucket is blocked by clothes or other foreign matter, causing the motor to stall and other abnormal conditions, not only the washing machine cannot work normally, but also there is a safety hazard of the motor burning out and catching fire. [0003] At present, there is a method to detect the abnormality of the motor stall or idling by detecting the change of the water level in the washing state, b...

AI Technical Summary

Problems solved by technology

[0002] In the existing washing machines, the more common driving method is to drive the motor to drive the barrel or the pulsator to rotate through the belt. When the washing machine adopts this driving method, the belt may fall off or break and cause the motor to idle; or, If the bucket is blocked by clothes or other foreign objects, causing the motor to stall and other abnormal conditions, not only the washing machine cannot work normally, but also there is a safety hazard of the motor burning out and catching fire.

[0003] At present, there is a method to detect the abnormality of the motor stall or idling by detecting the change of the water level in the washing state, but this method is insufficient. In the dehydration state, the water has been discharged and the water level is zero, so the detected water level The amount of change is also zero, which shows that this method is not applicable in the dehydration state. In other words, this method cannot detect abnormal conditions that occur in the motor drive in the dehydration state

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