Operating method of drain valve of washing machine

Abstract

The invention relates to an operating method of a drain valve of a washing machine. The washing machine comprises the drain valve of the washing machine and a start-stop control circuit. The operating method comprises the following drain steps that (1) a power supply is controlled by a control system so as to charge C1 when drainage is prepared, after the C1 is charged, a switch K is connected, a relay K1 is connected, and a motor is controlled to start so as to drain; (2) whether the drainage stage belongs to final drainage is determined; when the drainage stage belongs to non-final drainage, after the non-final drainage is finished, the washing machine enters a first delay procedure, at the moment, the switch K is disconnected, a normally open contact of a time relay S1 is connected, and the motor D is controlled to turn on for T1; after the whole washing process is fully finished, the washing machine enters a final drainage stage, after drainage is finished, the washing machine enters a second delay procedure, at the moment, the switch K is disconnected, a normally open contact of a time relay S2 is connected, and the motor D is controlled to turn on for T2; and the T2 is greater than the T1.

Description

technical field [0001] The invention belongs to the field of washing machines, in particular to a working method of a drain valve of a washing machine. Background technique [0002] Washing machine is a common electrical appliance in the life of residents. In the work of washing machine, there will be a drainage program after the work is completed. In the drainage program, a drain valve is used. The drain valve of the prior art such as CN2890519Y all uses a lifting structure to open and close the valve. Due to the structural limitation of the poppet valve, the protruding valve seat will change the direction of the waterway and cause water hammer. [0003] In the civilian field, there are high requirements for noise and quiet work, and water hammer will bring a certain amount of noise, which will cause discomfort to sensitive people. [0004] When washing the existing washing machines, a considerable part of the washing machines will have multiple drainage processes. There w...

AI Technical Summary

Problems solved by technology

[0004] When washing the existing washing machines, a considerable part of the washing machines will have multiple drainage processes. There will always be some water droplets or residues falling slowly in each drainage, and they will not be discharged in time. The washing machine has high hygiene requirements, so it is inconvenient

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