Method and device for controlling dehydration of washing machine

Abstract

The invention provides a method and a device for controlling dehydration of a washing machine. The method comprises the following steps of: at the starting of the dehydration, acquiring acceleration data; calculating displacement of an outer barrel of the washing machine according to the acquired acceleration data; judging whether the displacement of the outer barrel of the washing machine is greater than a displacement limit value; when the displacement is not greater than the displacement limit value, judging whether the current rotating speed of the outer barrel of the washing machine reaches a set maximum rotating speed, if the current rotating speed of the outer barrel of the washing machine does not reach the set maximum rotating speed, controlling a motor driving circuit to increase a target rotating speed, and if the current rotating speed of the outer barrel of the washing machine reaches the set maximum rotating speed, keeping the current rotating speed until the end of the dehydration; and when the displacement is greater than the displacement limit value, judging whether the current rotating speed is greater than a set safety rotating speed, if the current rotating speed is not greater than the set safety rotating speed, controlling the motor driving circuit to stop a motor, and if the current rotating speed is greater than the set safety rotating speed, controlling the motor driving circuit to decrease the target rotating speed and keeping dehydrating. By the invention, the shortcomings of the conventional method and the conventional device for controlling dehydration of the washing machine can be solved, so that the washing machine can get higher counter balance and dehydration performance.

Description

technical field [0001] The invention relates to a domestic washing machine, in particular to a method and device for controlling the dehydration of the washing machine, which is suitable for measuring and controlling the vibration of the outer barrel of the washing machine. Background technique [0002] The dehydration process of the washing machine is an important process in washing. If it is not well controlled, it may cause the machine to hit the bucket, shake violently, shift or even cause dangerous accidents; on the other hand, if it is not dehydrated, the clothes will not be dried. Therefore, how to obtain better dehydration performance and keep the stability of the machine has always been a difficult problem in the industry. [0003] Usually we call the uneven distribution of clothes in the bucket as unbalanced. The traditional washing machine dehydration control method requires a special dehydration stage (around 90rpm), and simulates and calculates the unbalance in...

AI Technical Summary

Problems solved by technology

[0004] However, this method is non-real-time, and the unbalance measured in a special stage cannot represent the constantly changing unbalance during the entire dehydration process; at the same time, due to the long sampling time, the machine will not be able to detect the barrel collision that occurs during the sampling process. Make a timely response; in addition, because the displacement of the barrel is not directly measured, the error of the unbalance amount obtained from the measurement and calculation is very large

Images