Eccentricity detection method for washing machine

Abstract

The invention provides an eccentricity detection method for a washing machine. The method comprises the following steps: S1, entering a washing procedure; S2, reading the value of an acceleration sensor to obtain an inclination angle of a corresponding outer drum; S3, judging whether the inclination angle of the outer drum is greater than a preset value; S4, if the judgment result is yes, controlling a motor to perform a certain period of time of eccentric treatment, then returning to S3, and if the judgment result is no, entering next step; S5, judging whether the washing time is ended; and S6, if the judgment result is yes, detecting and correcting the inclination angle and then ending the washing procedure, and if the judgment result is no, returning to S2. The method provides an active detection mode, namely whether the washing machine is eccentric during washing and bleaching is detected by utilizing the acceleration sensor, and the corresponding eccentric treatment is performed if the washing machine is eccentric, so that a drum collision phenomenon caused by high eccentricity during dewatering in the washing machine is avoided, and the service life of the washing machine is prolonged.

Description

technical field [0001] The invention relates to the field of washing machines, in particular to a washing machine eccentricity detection method. Background technique [0002] As a daily household appliance, the washing machine liberates people from the work of washing clothes, so it is popular among users. It mainly includes a cabinet, an outer tub, an inner tub, a pulsator, a motor and a control panel; the pulsator is located in the inner tub. The inner barrel is located in the outer barrel, and the outer barrel is suspended on the box body through a suspender, and the control board controls the motor for washing and dehydration. When the washing is completed, the washing machine dehydrates. The existing dehydration method of the fully automatic pulsator washing machine is that the clothes move under the drive of the inner barrel, and the dehydration effect is achieved through the action of centrifugal force. When the clothes are not evenly distributed, the dehydration is e...

AI Technical Summary

Problems solved by technology

When the washing is completed, the washing machine dehydrates. The existing dehydration method of the fully automatic pulsator washing machine is that the clothes move under the drive of the inner barrel, and the dehydration effect is achieved through the action of centrifugal force. When the clothes are not evenly distributed, the dehydration is easy to vibrate and hit the barrel. , in severe cases, displacement occurs, which affects the quietness of the washing machine, the life of the motor and the mechanical structure

[0003] Most of the traditional eccentric detection is to judge whether it is eccentric by detecting the fluctuation of the motor speed. This method has low precision and poor reliability.

[0004] Most of the existing fully automatic washing machines detect the eccentricity through the stop switch installed on the disk base, and avoid hitting the bucket by hitting the anti-collision bar to trigger the stop switch when the dehydration is unbalanced. The following disadvantages: first, when the eccentricity is too large, due to inertia, the barrel will also be hit when the stop switch is triggered; secondly, the anti-collision bar is fixedly installed in one position, which may also cause the phenomenon of hitting the barrel but not triggering the stop switch , resulting in the failure to detect and avoid vibration; finally, due to the strong randomness of the impact, the outer tub may be eccentric but not hit the stop switch, which will cause "misleading", so that the washing machine will continue to dehydrate and continue to hit The box body will eventually cause the washing machine box to shift or be damaged, reducing the service life of the washing machine

Therefore, this hysteresis-type detection is likely to cause the outer tub of the washing machine to hit the box, and the extra eccentric treatment increases the washing time of the washing machine

[0005] Some existing washing machines use photoelectric sensors to measure the rotational speed and calculate the acceleration to achieve the purpose of controlling the balance of the machine, but they cannot be accurately measured and controlled. When some eccentricity is involved, it is easy to hit the bucket during the dehydration initial velocity stage, and multiple calculations are required to try the appropriate dehydration curve. dehydration

[0006] To sum up, the eccentric detection of the traditional pulsator washing machine is mainly passive detection. This detection method has poor reliability and low accuracy. Long-term impact will reduce the service life of the washing machine.

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