KR0163517B1 - 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 the drainage pump that is continuously driven when dehydration after washing and rinsing is completed. The present invention is characterized in that the dehydration after washing and rinsing completion in a series of washing administration pumping a predetermined number of drain pumps on and off at a predetermined time interval after the completion of balancing dehydration.

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

The present invention relates to a method for preventing a drain pump vacuum of a washing machine, and more particularly, in a washing machine that drains water with a drain pump, so that dehydration can be performed while preventing the occurrence of a vacuum in the drain pump that is continuously driven after dehydration after washing and rinsing is completed. It relates to a drain pump vacuum prevention method of the washing machine.

When draining the wash water by pumping with a drain pump in a conventional washing machine, the water level sensor is pumped to determine the presence or absence of the wash water in the washing tank to drain.

However, when draining by the pumping action as described above, a large amount of air is introduced just before the start of dehydration by the continuous operation of the pump, and this inlet air remains in the pump by the water from the laundry after the start of dehydration. The air is not pumped out due to the suction force of the pump which continues to be driven, and thus the pumping action is not normally performed, and in severe cases, the pumping action is prevented, thus preventing normal drainage.

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 removed, there is a problem in that the vacuum state cannot be removed.

Therefore, an object of the present invention is to prevent the occurrence of vacuum in the pump by controlling the drain pump to drive to drain when dehydration after washing and rinsing completion.

In order to realize the above object, the present invention is characterized in that the dehydration after washing and rinsing in a series of washing strokes is made to dehydrate while pumping a predetermined number of drain pumps on and off at predetermined time intervals after the completion of balancing dehydration. .

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 applied to the present invention,

A driving signal input unit for inputting a washing operation signal for a series of washing operations;

A microcomputer (b) for controlling each driving unit by controlling the driving signal inputted from the driving signal input unit (a) by a predetermined program and outputting a controlled signal;

A water supply driving unit (C) for receiving a control signal from the microcomputer (b) and supplying water to a washing tank;

A water level detecting unit (D) for detecting the water level of the wash water supplied from the water supply driving unit (c) and the wash water drained;

A motor driving part (e) for washing or rinsing or dehydrating when rinsing is completed by a control signal of the microcomputer (b) when the level detected by the level detecting unit (d) reaches a set level;

When the washing and rinsing is completed in the motor driving part (e), the pump is driven by the control signal of the microcomputer (b), and is configured as a drain pump driving part (bar) for draining water.

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

Dehydration step (20) of dehydration while rotating the washing tank by driving the drain pump and the motor a predetermined number of times when the series of washing and rinsing operation is completed and dewatering,

Balanced dehydration step 21 for dehydrating while driving the drainage pump driving and the washing tank in the dehydration step 20,

In the balance dehydration step 21, a balance dehydration completion determination step 22 for determining whether the balance dehydration is completed, and

When the balance dehydration is completed in the balance dehydration completion determination step 22, the drain pump on and off step 23 of turning on and off the drain pump at a predetermined time interval while dehydrating the pump,

A drain pump on / off completion determination step 24 of determining whether the drain pump on / off driving has been completed a predetermined number of times in the drain pump on / off step 23;

When the on-off operation of the drain pump is completed a predetermined number of times in the drain pump on / off completion determination step 24, the normal dehydration step 25 for proceeding normal dehydration, and

In the normal dehydration step (25) is made to determine the completion of the dehydration step 26 to terminate the dehydration while determining whether the normal dehydration is completed.

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. In the microcomputer (B), the pulsator is rinsed by rotating the pulsator forward and backward while supplying water to complete rinsing.

When the rinsing is completed by a series of washing operations as described above, the microcomputer (b) goes to the dehydration operation (20) to control the motor driving part (e) and the drain pump driving part (bar) to proceed with dehydration while rotating the drain pump and the washing tank. At this time, the microcomputer (b) goes to the balance dewatering step 21 prior to this dehydration and pumps with a drain pump, and also performs a balance dewatering while driving the washing tank intermittently a predetermined number of times at a predetermined time interval. In the microcom (b), go to the balance dehydration completion determination step (22) to determine whether the balance balance in progress is complete, and if the balance balance is not completed at this time, when the balance dewater is completed in the microcomputer (b) Balanced dehydration is to proceed to, and if the balance result is completed, the microcom (b) in the drain pump on, off step While going to 23, dehydration proceeds while the washing tank is rotated at high speed, and the microcomputer (b) controls the drain pump driving part (bar) to turn the drain pump at a predetermined time interval, that is, 3 seconds off and 2 seconds on At this time, turning off the drainage pump for 3 seconds by turning off the drainage pump is performed while the drainage pump is turned off, and the drainage pump exhausts the air introduced into the drainage pump with the naturally drained water. It is to prevent the generation of vacuum.

As described above, while the exhaust pump is driven on and off for a predetermined time, the microcomputer (b) goes to the drain pump on / off completion judging step 24 and the predetermined number of times the on / off driving of the drain pump is preset. (2) If it is determined that the completion, if the on-off drive of the drain pump is not completed a predetermined number of times (2 times), the microcomputer (b) is repeatedly performed until the predetermined number of times After the predetermined number of times, the microcomputer (b) proceeds to the normal dehydration step (25) to control the motor driving part (e) and the drain pump driving part (bar) to drive the drainage pump and proceed with normal dehydration. In (b), go to the dehydration completion judgment step 26 to determine whether the dehydration in progress is completed, and if dehydration is not completed, continue dehydration, and if the dehydration is completed, end the washing. It will be.

As described above, according to the present invention, a series of washing and rinsing strokes are completed, and dehydration is started to exhaust the air introduced during the balance dewatering while driving the drain pump on and off at predetermined time intervals after completion of the balance dewatering. After the normal dehydration, it is to prevent the vacuum phenomenon generated in the drainage pump during dehydration will provide an effect that can smoothly drain the wash water.

Claims (2)

When the dehydration after washing and rinsing in a series of washing administrations, drainage pump vacuum prevention method of washing machine, characterized in that the dehydration while pumping a predetermined number of times the drain pump on and off at a predetermined time interval after the completion of balance dehydration. The method of claim 1, wherein after the balance dehydration is completed, the drainage pump is dehydrated by performing two seconds of turning off the drainage pump for three seconds and turning on for two seconds.