Washing machine belt pulley loosening detection method and washing machine belt pulley loosening detection device

Abstract

The present invention discloses a washing machine belt pulley loosening detection method and a washing machine belt pulley loosening detection device. The detection method comprises the steps of detecting a load parameter of a motor of a washing machine; if a condition a and / or a condition b is / are satisfied, determining that a belt pulley loosens, wherein the load parameter and the load of the motor are directly proportional, the condition a is that the increase amount of the load parameter within a first time period is less than a first preset value, and the first time period is located at an acceleration rotation stage of the motor; the condition b is that within a second time period after the first time period, the increase speed of the load parameter is greater than a second preset value. The washing machine belt pulley loosening detection method disclosed by the present invention determines whether the belt pulley loosens according to the change condition along with the time of the load parameter which is directly proportional with the load of the motor, so that the loosening of the belt pulley is detected, and accordingly, the potential safety hazards generated by the loosening of the belt pulley can be eliminated.

Description

technical field [0001] The invention relates to the technical field of washing machines, in particular to a detection method and a detection device for a loose belt pulley of a washing machine. Background technique [0002] At present, it is more economical to use a belt transmission mechanism to drive laundry, and it is the choice of most consumers. Specifically, such as figure 1 As shown, the motor 1 is fixed on the outer barrel 6, the belt pulley 3 is fastened to the transmission shaft 5 through the nut 4, the motor 1 drives the belt pulley 3 to rotate through the belt 2, and the belt pulley 3 drives the inner tube 7 to rotate through the transmission shaft 5. When the inner cylinder 7 rotates counterclockwise, the nut 4 will become tighter and tighter; when the inner cylinder 7 rotates clockwise, the nut 4 will become looser and looser, then the inner cylinder 7 will first rotate counterclockwise and then clockwise during washing , so that the loop runs. [0003] Howe...

AI Technical Summary

Problems solved by technology

After the belt pulley 3 is loose, there is no problem when the washing machine runs at low speed, that is, there is no problem during washing. However, there is a safety hazard in the high-speed dehydration operation of the washing machine. Specifically, when the washing machine is dehydrating, if the belt pulley 3 is loose, the motor only drives the belt The disc 3 rotates, but the inner cylinder 7 does not rotate, and the belt on the belt disc 3 is easy to fall off and jam the motor 1, resulting in a safety accident

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