KR100203861B1 - Method for unbalance detecting of a washing machine - Google Patents

Abstract

The present invention is to detect the unbalance of the washing tank by the twist of the laundry during the dehydration after the completion of washing or rinsing or during the dehydration operation of a series of washing strokes with a safety switch, to quickly detect the unbalance by the on and off time of the safety switch Regarding the unbalance detection method of a washing machine

The present invention washes in the initialization state and drained when the washing is completed, the dehydration step 32 to dehydrate while rotating the washing tank in one direction when the drainage is completed, and the safety switch in the dehydration step 32 A safety switch operation time determination step 34 of sensing a time for switching on and off and determining whether the detected operation time of the safety switch is greater than or equal to a predetermined time, and the safety switch operation time determination step 34 If the operating time of the safety switch is not more than the predetermined predetermined operating time (unbalanced), dehydration while determining whether the main dehydration is completed, if the operating time (unbalanced) of the safety switch is more than the predetermined predetermined operating time, dehydration After stopping, perform a re-rinse, and quickly detect the unbalance, the rapid re-running step 37 repeats until the main dehydration is completed to quickly unbalance And wherein one to detect it.

Description

How to detect unbalance of washing machine

The present invention relates to a method for detecting an unbalance of a washing machine. In particular, in the dehydration after washing or rinsing, or during the dehydration operation during a series of washing operations, the safety switch detects an unbalance of a washing tank caused by twisting of a laundry. The present invention relates to a method for detecting an unbalance of a washing machine, which enables to quickly detect an unbalance with an off time.

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 operation of the detected safety switch. To detect the unbalance, drive the motor for at least 4 seconds and then the next safety switch. 7 seconds until

You must wait to detect unbalance.

As described above, in the prior art, when the dehydration is performed, the unbalance is detected and judged as the operating state of the safety switch, that is, the water tank, by pressing the safety switch in the balance dewatering stroke. The longer the dehydration time is, the longer the overall dehydration time is, the more noise is generated, and the trauma of the reservoir caused by the collision of the reservoir and the safety switch is damaged. There is a problem that adds more unbalance.

An object of the present invention is to detect the unbalance during dehydration more quickly to prevent vibration noise and damage to the reservoir caused by the unbalance.

In order to achieve the above object, the present invention provides a dehydration step of proceeding with dehydration when a series of washing or rinsing strokes are completed and drainage is completed, and detecting the on / off time of the safety switch during dehydration in the step; Determining whether the on / off time of the safety switch detected in the step is greater than or equal to a predetermined time; and if the on / off time of the safety switch is less than or equal to the predetermined time, proceeding with dehydration. When the on / off time of the safety switch is more than a predetermined time, the step of releasing the unbalance while re-rinsing is characterized in that it is 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

end; Operation signal input unit b; Micom

All; Drainage and driving part d; Water level detector

hemp; Motor drive bar; Safety switch

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. It will consist of a hayeoseo East (E), and a safety switch (F) for detecting the unbalance of the washing tub during dehydrating operation of the motor drive unit (E).

3 is a flowchart of the method for detecting the unbalance of the present invention, in which the washing step 30 proceeds with washing when water is completed in the washing tank in the initialization state, and when washing is completed in the washing step 30, When the drainage step 31 for draining the contaminated wash water and the drainage step 31 is completed, the dewatering step 32 for dewatering while rotating the washing tank in one direction at high speed, and in the main dewatering step 32 When the dehydration is started, the safety switch operating time detection step 33 for detecting the time when the safety switch is switched on and off, and the operating time of the safety switch detected in the safety switch operating time detection step 33 is set in advance. The safety switch operation time determination step 34 for determining whether or not a predetermined time or more, and the predetermined operation time (uncommented) in which the operation time of the safety switch is preset in the safety switch operation time determination step 34. If it is not abnormal, the predetermined dehydration completion step 35 for dehydration while determining whether or not the main dehydration is completed, and the predetermined operating time (unbalance) of the safety switch is set in the safety switch operation time determination step 34. Dehydration stop step (36) to stop dehydration in order to release the unbalance when the operation time or more, and when the dehydration is completed while stopping the dehydration in the dehydration stop step (36), re-rinsing, detecting the unbalance It will be made to the re-rinsing step 37 to perform repeatedly.

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), go to the main dehydration step (32) to control the motor drive unit (e) to proceed with dehydration while rotating the washing tank in one direction at high speed, in the microcomputer (b) go to the safety switch operation time detection step (33) Detect the operating time of the switch lever 4 of the safety switch 5 mounted on the outer upper portion of the water storage tank 1 caused by the unbalance of the washing tank caused by the twisting of the laundry during dehydration, that is, the time taken to turn on in the off state. Done.

When the operation time of the safety switch is detected as described above, the microcomputer (b) goes to the safety switch operation time determination step 34 and determines whether the detected operation time of the safety switch is greater than or equal to a predetermined predetermined operation time (unbalance). In this case, if the detected operating time of the safety switch is less than the predetermined predetermined operating time, the microcomputer (b) determines that unbalance has not occurred and proceeds to the main dehydration completion determination step (35). Dehydration is performed until the completion of the dehydration. On the other hand, if the detected operating time of the safety switch is greater than a predetermined predetermined operating time, the microcomputer (b) determines that an unbalance has occurred and goes to the dehydration stop step (36). Stop the dehydration by controlling the motor driving part (e), go to the re-rinsing step (37) and control the water supply and drain driving part (c) to supply to the washing tank After the re-rinsing is completed by controlling the motor driving unit (e), and when the rinsing is completed, the microcomputer (b) goes to the main dehydration step 32 to control the motor driving unit (e) to proceed with main dehydration, but the safety By detecting the switch operation time, and judging and controlling whether the detected operation time of the safety switch is in an unbalanced state, the dehydration is completed while repeatedly performing the dehydration.

As described above, the present invention does not perform a balance dehydration during the dehydration administration, which is performed to improve the washing effect after a series of washing administration completion or rinsing administration completion, and detects the initial safety switch operation time during the dehydration. If the operating time is greater than the predetermined predetermined operating time (unbalanced), stop dehydration and proceed with re-rinsing to release the unbalance and perform this dehydration, so that the unbalance can be detected more quickly and accurately during dehydration. The dehydration time is long due to the detection or vibration noise is greatly generated, and even before the damage to the reservoir is prevented to provide the effect of dehydration.

Claims (1)

In the unbalance detection method of the washing machine, washing in the initialization state and draining when the washing is completed, the dehydration step 32 for dewatering while rotating the washing tank in one direction when the drainage is completed, and the main dehydration step (32) And a safety switch operating time determining step 34 of detecting a time when the safety switch is switched on and off, and determining whether the detected operating time of the safety switch is greater than or equal to a predetermined time, and the safety switch operating time. If the operation time of the safety switch in the determination step 34 is not more than the predetermined predetermined operation time (unbalance), the dehydration completion determination step 35 of dehydration while determining whether the main dehydration is completed and the safety switch operation time If the operating time (unbalance) of the safety switch in the determination step 34 is more than the predetermined predetermined operating time, dehydration is stopped and then re-rinsing is performed. Method of sensing unbalanced washing machine that a rinsing step to consist of a material (37) to perform repeated until the dehydration is complete, be detected with a switch according to claim.

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