KR19990004064A - How to detect unbalance of washing machine - Google Patents

Abstract

The present invention relates to a method for detecting an unbalance of a washing machine, which is capable of quickly and accurately detecting the unbalance of a washing tank by a safety switch when dehydration of a washing tank caused by twisting of laundry during dehydration. After the completion of the drainage, the dehydration step 32 for dehydration, the safety switch off determination step 33 for determining whether the off state of the safety switch in the dehydration step 32, and the safety switch-off If the off state of the safety switch is not generated in the determination step 33, the dehydration completion determination step 34 of dehydration until dehydration is completed, and the off state of the safety switch occurs in the safety switch off determination step 33 If so, the safety switch-off frequency determination step 35 for judging whether the OFF frequency of the safety switch has been generated more than the arbitrarily set OFF frequency (three times), and the If the safety switch off frequency determination step 35 does not occur more than the number of randomly set off (three times), the unbalance release step 36 for dehydration while canceling the unbalance generation, and the safety switch off frequency In the determination step 35, if the number of times of off of the safety switch is arbitrarily set more than the number of off (three times) is characterized in that the unbalance error alarm step 37 for alerting the unbalance error.

Description

How to detect unbalance of washing machine

The present invention relates to a method for detecting an unbalance of a washing machine, and in particular, in detecting the unbalance of a washing tank by twisting laundry when dewatering after washing or rinsing, or dehydrating a series of washing strokes, by using a safety switch. The present invention relates to a method for detecting an unbalance of a washing machine so as to quickly and accurately detect the number of times of off.

In general, the unbalance detection of the washing machine was detected by the number of operations in the safety switch mounted on the outer top of the water tank of the washing machine. That is, the unbalance detection of the safety switch detects the operation of the first (7 seconds) safety switch by performing the washing tank four times for a predetermined time (4 seconds on, 3 seconds off) when the balance is dewatered after draining in a series of washing strokes. And then detect the presence or absence of the safety switch for the second (7 seconds) and detect the unbalance by the number of times the detected safety switch is operated.For example, to detect the unbalance, the motor is driven for at least 4 seconds and then You have to wait 7 seconds for the next safety switch to activate the unbalance.

As described above, in detecting unbalance as the number of operation of the safety switch, the number of operation of the safety switch is off when the balance switch hits the lever of the safety switch when the balance switch is dehydrated or dehydrated, that is, the safety switch is turned off. Is detected by the operation of the safety switch to detect and determine the unbalance.

Therefore, if the laundry is severely twisted to cause large unbalance, the operation time of the on-off-on of the safety switch becomes long, and thus the time for detecting the unbalance becomes long, so that the detection time of the unbalance becomes long. In addition to the longer the dehydration time, the greater the noise, and also damage the trauma of the reservoir caused by the collision of the reservoir and the safety switch, and in severe cases to move by the shaking of the washing machine to increase the unbalance more and more I have a problem.

An object of the present invention is to be able to more quickly and accurately detect the unbalance during dehydration, to maximize the prevention of vibration noise and reservoir damage due to unbalance.

In order to achieve the above object, the present invention is a step of proceeding to dehydration when a series of washing or rinsing stroke is completed and drainage is completed, and determining whether the safety switch is turned off when dehydration in the step, and the step Determining whether dehydration is complete if the off state of the safety switch does not occur in the step, and if the off state of the safety switch occurs in the above step, determining whether the off frequency of the safety switch has been generated at a randomly set off number And disabling the unbalance if the off frequency of the safety switch has not been generated at a randomly set off frequency in the step, and alerting the unbalance error if the off frequency of the safety switch has been generated at a randomly set off frequency in the step. Characterized in that made.

1 is a partial side cross-sectional view of a washing machine equipped with a safety switch used in the present invention

2 is a schematic control block diagram of a washing machine used in the present invention;

Figure 3 is a flow chart for the unbalance detection method of the washing machine of the present invention

Explanation of symbols for main parts of the drawings

A; Operation signal input; Micom

All ; Drainage and drainage drive; Water level detector

E; Motor drive part bar; Safety switch

Four; Error display part

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

1 is a partial side cross-sectional view of a washing machine equipped with a safety switch used in the present invention, the opening and closing state of the door (2) in front of the upper side of the reservoir (1) for storing the water to be washed when washing and rinsing It is to be equipped with a safety switch (5) having a door lever (3) and a switch lever (4) for detecting the unbalance of the reservoir (1) generated by the twisting of the laundry when dewatering downward.

Figure 2 is a schematic control block diagram of a washing machine used in the present invention, a driving signal input unit (a) for setting and inputting a series of washing operation, washing, rinsing, dehydration operation and from the operation signal input unit (a) Receives a microcomputer (b) for controlling a series of washing operations by controlling the input operation signal by a predetermined program and outputting the controlled signal to each drive unit, and receiving a control signal output from the microcomputer (b). Water supply and drainage drive unit (C) for supplying the wash water to the washing tank and draining the supplied water, and the level of the wash water supplied and drained from the water supply and drain unit (C) by the control signal output from the microcomputer (B). The water level detecting unit (D) and a motor for washing and rinsing the pulsator by rotating the pulsator forward and reverse according to the control signal of the microcomputer (B), and rotating the high speed after the washing and rinsing is completed. Eastern (e), safety switch unit (bar) for detecting the unbalance of the washing tank during dehydration operation by the control signal of the microcomputer (b), and error display unit for warning the unbalance error by the control signal of the microcomputer (b) It consisted of (g).

3 is a flowchart illustrating a method for detecting an unbalance of a washing machine according to the present invention, in which a washing step 30 proceeds with washing when water is completed in a washing tank in an initialization state, and when washing is completed in the washing step 30, when washing In the draining step 31 for draining the contaminated washing water generated and the draining step 32 when the draining step is completed in the draining step 31, the washing tank is dewatered while rotating at a high speed in one direction, and in the dewatering step 32. When the dehydration starts, the safety switch off determination step 33 for determining whether the safety switch off state has occurred, and if the safety switch off state does not occur in the safety switch off determination step 33, is the dehydration completed? Dehydration completion determination step 34 to dehydrate until the dehydration is completed while judging, and if the safety switch off state occurs in the safety switch off determination step 33, The safety switch off frequency determination step 35 for determining whether the off frequency of all the switches has been generated more than the arbitrarily set off frequency (3 times) and the safety switch off frequency determination step 35 are arbitrarily selected. If it does not occur more than the set number of off times (three times), the debalance release step 36 for dehydration while canceling the unbalance generation, and the number of off times of the safety switch in the safety switch off frequency determination step 35 If more than 3) is generated, the unbalance error alarm step 37 is provided to alert the unbalance error.

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

First, the power source is supplied to the washing machine, and the laundry to be washed is put in the washing machine while the microcomputer (b) of the washing machine is initialized. Then, the driving signal for the series of washing administrations to be washed through the driving signal input unit (A) is input to the micom ( B) If the input to the microcomputer (b) goes to the washing step 30 to determine the water level for the laundry by a predetermined program, and to control the water supply and drainage drive (c) to supply water to the determined water level The water supply level is sensed through the water level detection unit d, and the water supply is completed at the determined water level.

When the water supply is completed as described above, the microcomputer (b) controls the motor driving part (e) to form the washing water flow while washing the pulsator forward and reverse, and proceeds to washing, but washes until a predetermined washing time is completed. Will proceed.

When the washing is completed, the microcomputer (b) goes to the draining step 31 to control the water supply and drain driving unit (c) to drain and complete the contaminated washing water generated during the washing, and when the draining is completed, the In the microcomputer (B), to dehydrate the contaminated water in the laundry, go to the dehydration step 32 to control the motor driving part (e) to start dehydration while rotating the washing tank in one direction at high speed.

When dehydration starts as described above, the microcomputer (b) goes to the safety switch off determination step 33 to detect unbalance of the washing tank and controls the safety switch unit (bar) to eccentric the washing tank by twisting the laundry during washing. Therefore, when the reservoir 1 hits the switch lever 4 of the safety switch 5, it is determined whether the contact of the safety switch 5 is turned off momentarily.

In this case, if the safety switch is not turned off in the safety switch off determination step 33 during the dehydration, it is determined whether the dehydration in progress is completed by going to the dehydration completion determination step 34, and if the dehydration is not completed, Go to the dehydration step 32 to determine the off state of the safety switch to dehydrate until the dehydration is completed.

However, if the safety switch is turned off in the safety switch off determination step 33, the microcomputer (b) goes to the safety switch off frequency determination step 35, and the off frequency of the safety switch is arbitrarily set (3 times). If it is determined that the abnormality has occurred, and the determination result is that the off number of the safety switch does not occur more than the arbitrarily set number of off times (3 times), the microcomputer (b) goes to the unbalance release step (36). Control the eastern part (C) to supply water to 1/2 of the determined water level, and control the motor driving part (M) to release the unbalance for a randomly set time (7 minutes) while shortly turning the pulsator forward and reverse. Go back to the dehydration step 32 to proceed with the dehydration, go to the safety switch off judging step 33 to determine the occurrence of the safety switch to proceed with dehydration All.

On the other hand, if the number of times of safety switch off in the safety switch off determination step 35 is more than the randomly set number of off (three times), the microcomputer (b) causes the twist of the laundry to be severely generated, even though the unbalance is released. And it is determined that the reservoir (1) continues to turn off the safety switch (5) to go to the unbalance error alarm step 37 to control the error display unit (G) to alert the user that the unbalance has been badly generated. .

As described above, the present invention determines whether dehydration is completed when the safety switch is not turned off by determining whether a series of washing or rinsing strokes is completed and draining is completed, so that the safety switch is turned off. When the safety switch is turned off, on the other hand, if the safety switch is turned off, it is determined whether the safety switch off number is a randomly set number of times. On the other hand, if the number of offs of the safety switch is set to a randomly set number of offs, an unbalance error can be alerted, so that the unbalance can be detected more quickly and accurately when dewatering, thereby preventing the vibration noise caused by the unbalance and the damage of the reservoir to the maximum. Will be provided.

Claims (1)

When washing is completed and drainage is completed, a dehydration step 32 for dehydrating while rotating the washing tank at high speed, and a safety switch-off determination step 33 for determining whether an off state of the safety switch is generated in the dehydration step 32. And, if the off state of the safety switch does not occur in the safety switch off determination step 33, the dehydration completion determination step 34 to dehydrate until dehydration is completed, and the safety switch off determination step 33 If the off state of the switch is generated, the safety switch-off frequency determination step 35 for judging whether the OFF number of the safety switch has occurred more than the arbitrarily set OFF number (three times), and the safety switch-off frequency determination step 35 In the case that the off frequency of the safety switch does not occur more than the arbitrarily set off frequency (3 times), the unbalance release step 36 of dewatering while canceling the unbalance generation, and the safety switch Unbalance of the washing machine, characterized in that the non-balance error alarm step (37) to alert the unbalance error if the off-off frequency of the safety switch in the position-off frequency determination step (35) is more than the number of randomly set off (three times) Detection method.