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Method for controlling safe on-off of washing machine

A technology of safety control and safety switch, applied in the control device of washing machine, other washing machines, washing devices, etc., can solve the problems of low control precision of safety switch, automatic movement of outer tub washing machine, impact of dewatering tub, etc. Simple structure and convenient installation

Inactive Publication Date: 2012-05-30
PANASONIC HOME APPLIANCES R&D CENT HANGZHOU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for controlling the safety switch of the washing machine to solve the problems that the control accuracy of the safety switch in the current washing machine is not high, the dehydration bucket hits the outer bucket easily during dehydration, and the washing machine automatically moves during the dehydration process.

Method used

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  • Method for controlling safe on-off of washing machine
  • Method for controlling safe on-off of washing machine
  • Method for controlling safe on-off of washing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The block diagram of the washing machine safety switch control method is as follows: figure 1 As shown, the washing machine is equipped with a rotation speed detection device for the dehydration bucket. The rotation speed detection device is arranged on the body near the power shaft that swings relatively small when the dehydration bucket rotates. The rotation speed detection device is a Hall element, which is similar to the Hall element. A magnet is set on one side of the corresponding power shaft, and the Hall element is connected to the main control chip of the washing machine. The detection device will send a position signal to the control chip every time the dehydration bucket rotates. After the dehydration bucket starts to work, the main control chip starts to detect and calculate The rotation speed of the dehydration bucket, its detection and calculation program flow is as follows: image 3 As shown, when the dehydration bucket does not rotate or the rotation spe...

Embodiment 2

[0020] The Hall element of embodiment 2 is connected with an auxiliary control chip set up separately. When the dehydration bucket starts to rotate, the auxiliary control chip starts to detect and calculate the rotation speed of the dehydration bucket. When setting the value, the auxiliary control chip disconnects the safety switch of the washing machine, and the rest are the same as in Embodiment 1.

Embodiment 3

[0022] The rotation speed detection device adopted in embodiment 3 is a photoelectric element, and the photoelectric element is arranged near the power shaft that swings relatively small when the dehydration bucket rotates. The main control chip of the washing machine is connected with the receiving element, and a light reflector is arranged on one side of the power shaft corresponding to the generation of light and the receiving element, and the rest are the same as in Embodiment 1.

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Abstract

The invention discloses a control method of a safety switch of a washing machine, which comprises the following steps: a dehydration cylinder rotating speed detecting device is arranged on the washing machine and connected with the control chip of the washing machine, when the dehydration cylinder starts working, the control chip detects and calculates the rotating speed of the dehydration cylinder, and when the rotating speed of the dehydration cylinder is lower than a set value, the control chip disconnects the safety switch of the washing machine. The method effectively solves the problemsof the existing washing machines that the control precision of the safety switch is low, the phenomenon that the dehydration cylinder impacts the outer cylinder is easy to happen, and the washing machine automatically moves during the dehydration process, and also the problem that the safety switch fails to function and the motor is easily damaged when the dehydration cylinder is hard to be started or rotates extremely slowly. The method has simple structure, low cost and good control effect, thus being worthy of generalization and application.

Description

technical field [0001] The invention relates to a washing machine, in particular to a method for controlling a safety switch of the washing machine which can improve the safety performance of the washing machine. Background technique [0002] Household washing machines have been very popular, and it combines washing water, detergent and mechanical force to achieve the purpose of washing clothes. The mechanical force of modern washing machines is to drive the pulsator at the bottom of the washing tub through the motor to alternately rotate clockwise and counterclockwise to drive the clothes to roll and rotate, so that the clothes and clothes, clothes and pulsator, and clothes and the barrel rub against each other to achieve the best effect of washing clothes. Purpose. [0003] During the washing process, the clothes tend to be unbalanced during the tumbling and spinning process, especially in the dehydration process of the washing machine, the unbalanced state of the dehydra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06F33/00D06F37/42D06F39/00G01P3/00
Inventor 徐丁英
Owner PANASONIC HOME APPLIANCES R&D CENT HANGZHOU