KR0164171B1 - A drain pump vacuum preventing method of a washing machine - Google Patents

Abstract

The present invention relates to a drainage pump vacuum prevention method of a washing machine in which a drainage pump can be drained while preventing the occurrence of a vacuum in a drainage pump driven during drainage and dehydration after washing and rinsing is completed. The present invention detects the current of the drain pump driven when draining and dehydrating after washing and rinsing completion in a series of washing strokes, and drains the vacuum while the vacuum pump is discharged by turning on and off the drain pump according to the detected drainage pump current. Characterized in that made.

Description

Drainage pump vacuum prevention method of washing machine

1 is a schematic control block diagram of a washing machine used in the present invention.

2 is a flow chart for the drain pump vacuum prevention method of the present invention.

* Explanation of symbols for main parts of the drawings

A: Operation signal input part B: Micom

C) Water supply drive part D: Water level detection part

E: Motor drive bar: Drain pump drive

4: Pump current detector

The present invention relates to a method of preventing a drain pump vacuum of a washing machine, and more particularly, in a washing machine drained by a drain pump, after washing and rinsing is completed, drainage can be performed while preventing the generation of a vacuum in the drain pump driven during drainage and dehydration. It relates to a method for preventing a vacuum of a drain pump of a washing machine.

In the conventional washing machine, when washing and rinsing after completion of the drainage or dewatering pumped by the drain pump to drain the wash water, the water level sensor to determine whether the wash water in the washing tank by pumping to drain.

However, when draining and dehydrating by the pumping action of the pump as described above, the pump is introduced by the continuous operation of a lot of air just before the start of the dehydration, this inlet air remains in the pump by the water from the laundry after the start of dehydration The remaining air is not kept out of the air due to the suction force of the pump which keeps running, and it stays inside the pump, and the air is not pumped normally. You won't be able to.

Therefore, a separate exhaust hose is formed in order to remove the vacuum state at the back of the pump generated during the operation of the pump, thereby suppressing the occurrence of the vacuum state generated at the time of pumping, or even by changing the design in various forms. Although the vacuum state is to be removed, there is a problem that the radical state can not be removed.

Therefore, an object of the present invention is to detect the current state of the drain pump to drive to drain when draining and dehydration after washing and rinsing completion, if the detected current is more than a predetermined current so that the drainage is made while the operation of the pump on, off By doing so, it is intended to drain and dewater while preventing the generation of vacuum in the pump.

In order to realize the above object, the present invention drives the pump during drainage and dehydration after washing and rinsing completion in a series of washing strokes, and detects the current state of the driving pump so that the detected current is equal to or less than the idling current. The operation is stopped, the drainage is completed, and if the sensed current is not the idle current or less, it is determined that the vacuum generation current value is applied, and the drainage and dehydration is performed while stopping the pump for a predetermined time.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a control block diagram of a washing machine adapted to the present invention. The driving signal input unit (A) for inputting a washing operation signal for a series of washing operations and a driving signal input from the driving signal input unit (A) are preset. A microcomputer (b) for controlling each drive unit by outputting a signal controlled and controlled by a predetermined program, a water supply driver (c) for receiving a control signal from the microcomputer (b) and supplying water to a washing tank, and the water supply driver ( C) The water level detection unit (D) for detecting the water level of the wash water being drained and the drained water and the control signal of the microcomputer (B) when the water level detected by the water level detection unit (D) reaches a set level. When the washing or rinsing or rinsing is completed by the motor drive unit (e) for dehydration, and when the washing and rinsing is completed in the motor drive unit (e) pumping drive by the control signal of the microcomputer (b) Books and the drain pump driving unit (F) to the drain, to the hayeoseo composed of pump current detector (S) for sensing a drive current of the pump the drain pump driving unit (F).

2 is a flow chart for the method for preventing the drainage pump vacuum of the present invention, the drainage and dehydration operation step 20 for draining and dehydrating operation when the series of washing and rinsing operation is completed, and in the drainage and dewatering operation step 20 A drain pump driving step 21 for driving a drain pump, a drain pump current sensing step 22 for sensing a current state of the drain pump driving in the drain pump driving step 21, and the drain pump current sensing step ( A first pump current judging step 23 determining whether the current of the drain pump sensed in step 22 is less than or equal to the current at idling; and a drain pump if the current detected in the first pump current judging step 23 is less than or equal to the idling current. In the drain pump stop step 24 of stopping the drainage pump, the drainage completion step 25 of completing the drainage if the drainage pump is stopped in the drainage pump stop step 24 and the first pump current determination step 23 are detected. Current exceeds idle current If the current detected in the second pump current determination step 26 and the current detected in the second pump current determination step 26 is a vacuum current, the drainage stops the drain pump for a predetermined time. It is to be made to the pump stop step (29).

Referring to the effects of the present invention made as described above are as follows.

When power is supplied to the washing machine, and then laundry is put in the washing machine for washing, the driving signal for the washing cycle is input through the driving signal input unit of the washing machine. The water supply driving unit (C) is controlled by a predetermined program with respect to the washing operation signal of the water supply by the operation signal input to the washing tank, but the water level is detected by controlling the water level detection unit (D) to detect the water supply level. Done.

Subsequently, when a predetermined water supply is completed by the water level detecting unit (d), the microcomputer (b) controls the motor driving unit (e) to proceed with washing while rotating the pulsator forward and reverse, and then washing is completed. When the microcomputer (b) supplies water, the pulsator is rotated forward and reverse to rinse and complete the rinsing.

When the rinsing is completed by a series of washing administrations as described above, the microcomputer (b) goes to the drainage and dehydration operation (20) and proceeds with drainage and dehydration. Then, the microcomputer (b) goes to the drainage pump driving step (21). The motor driving part (e) and the drain pump driving part (bar) are controlled and pumped by the drainage pump to proceed with the drainage.

As described above, the microcomputer (b) goes to the pump current sensing step 22 and controls the pump current sensing unit to detect the current of the currently operated drain pump in the state where the drain pump is being drained. Subsequently, the microcomputer (b) goes to the first pump current judging step 23 to determine whether the sensed current is less than the idling current, and if the sensed current is less than the idling current, the micom (b) In the drain pump is judged that the drainage is well done without idling, go to the drainage pump stop step 24 to control the drainage pump drive unit (bar) to stop the drainage pump, then drainage completion step (25) Go to and complete the drainage.

However, if the current sensed in the first pump current judging step 23 is not equal to or lower than the idling current, the second pump current judging step 26 determines whether the detected current is a pump current in a vacuum state. As a result of the determination, if the detected pump current does not reach the current in the vacuum state, the microcomputer (b) determines that the pump is driven normally until now, and drains until the drainage is completed, and the second pump current determination step ( If the current sensed in 26) is a pump current in a vacuum state, the microcomputer (b) determines that a vacuum state is generated and drainage is not normally performed, and then the drain pump stops at step 27 and goes to the drain pump for a predetermined time. To stop and then drain and dewater until the drain is completed while repeating the above process from the drain pump current detection step 22 All.

As described above, the present invention detects a current state of a drain pump that is driven when draining after a series of washing and rinsing strokes, and turns off the drain pump at a predetermined time interval when the detected current is a pump current in a vacuum state. By draining while evacuating the vacuum state, it is to provide an effect that can smoothly drain while suppressing the generation of noise during drainage and dehydration.

Claims (2)

After the washing and rinsing is completed in a series of washing strokes, it detects the current of the drain pump that is driven during drainage and dehydration, and turns on and off the drainage pump according to the detected current of the drainage pump to drain the vacuum state. Drain pump vacuum prevention method of washing machine. The method of claim 1, wherein the on / off of the drain pump stops the operation of the pump when the current of the detected drain pump is less than the idle current, completes draining, and when the detected current is a vacuum generation current value, Drainage pump vacuum method of the washing machine characterized in that it is made to drain and dehydrate while stopping for a predetermined time.