KR100395951B1 - Control method for device of pumping out in washing machine - Google Patents

Abstract

The present invention relates to a drainage control method of a washing machine, and more particularly, to a drainage control method of a washing machine that can prevent the risk of malfunction even if a short circuit occurs due to moisture infiltration into the drainage device. The present invention prevents the motor from rotating in an abnormal operation state of the switch by using a switch in which the motor in the washing machine drainage is controlled on / off by operation of a cam and a triac connected in series with the switch. That is, even if the two-stage operation switch of the washing machine drainage is shorted by moisture, the triac is controlled to be in an off state, thereby preventing the motor from being forcibly rotated, thereby preventing gear breakage inside the motor.

Description

Control method for device of pumping out in washing machine

The present invention relates to a drainage control method of a washing machine, and more particularly, to a drainage control method of a washing machine that can prevent the risk of malfunction even if a short circuit occurs due to moisture infiltration into the drainage device.

1 is a block diagram of a general washing machine. As shown in the drawing, the washing tub 2 is installed in the washing machine 1, and a laundry cloth is accommodated in the washing tub 2 to accommodate the washing. The bottom surface of the washing tank (2) is formed with a plurality of washing wings that can be rotated together with or separately from the washing tank (2) to increase the washing efficiency.

A cover is provided at an upper end of the washing machine 1 to shield the upper end of the washing tank 2 during washing, and a lower portion of the washing machine 1 has a drain pipe 4 which is a passage through which the washed water is discharged to the outside of the washing machine. It is installed. In addition, the bottom of the washing tank (2) is provided with a drain (3) for controlling the clutch 5 and the water used for washing to be discharged through the drain pipe (4).

Referring to the operation of the general washing machine 1 according to the above configuration is as follows.

When the user operates the washing machine 1 by pressing the power switch after inserting the laundry cloth into the washing tank 2, the washing water is supplied into the washing tank 2 according to the level set to be suitable for the quantity and characteristics of the washing cloth. When the supply of the washing water is completed, the motor (not shown) rotates. As the washing tank 2 and the plurality of washing blades are rotated by the rotational force of the motor, washing is performed while stirring the washing cloth and the washing water together.

On the other hand, in the automatic washing machine 1 as described above, washing and rinsing are performed in the same manner as described above, and a dehydration and drying process is performed to dry the laundry cloth in the following process.

The dehydration process is to rotate the washing tank (2) at high speed to dehydrate by the centrifugal force generated at that time. That is, the centrifugal force generated by the rotational force of the washing tub 2 allows the moisture of the washing cloth to be drained, and the drainage device 3 so that the water used for washing can be discharged to the outside of the washing machine through the drain pipe 4. ) Works.

Next, an operation process of the drainage device 3 in the washing machine operating as described above will be described.

The drainage device 3 is configured to control the drainage operation of the washing machine and the operation of the clutch 5. That is, as shown in FIG. 2, the cam 11 is connected to the output lever 9 and includes first and second switches 6 and 7 which are controlled on / off by the operation of the cam 11. do. A motor 8 for driving the cam 11 is included, and a relay 10 for controlling the operation of the motor 8 is also included.

In the drainage device configured as described above, the first switch 7 serves to release the brake of the clutch 5 to enable rotation of the washing tub 2 in the washing process, and the second switch. (6) opens the drain valve to enable drainage. In the initial state, the output lever 9 is completely removed. At this time, the first switch 7 is turned on, and the second switch 6 is turned off.

Next, a control operation of the drainage device having the above configuration will be described.

As mentioned above, in the initial state the first switch 7 has an on state and the second switch 6 has an off state. Accordingly, the brake of the clutch 5 is released by the first switch 7 to enable the rotation of the washing tub 2 during the washing stroke. In addition, since the second switch 6 maintains the off state, the drain pipe 4 is in a blocked state in which water used for washing cannot be discharged to the outside.

Power is supplied to the motor 8 through the first switch 7 in the on state in the initial state. The motor 8 is operated when power is supplied, and the cam 11 is rotated in accordance with the rotation of the motor 8. At this time, since the clutch 5 brake is released by the ON state of the first switch 7, the washing tub 2 can rotate. That is, the washing tank 2 is rotated as it is controlled in the above state at the washing stroke.

When the cam 11 is rotated such that the output lever 9 is sucked by a predetermined amount, the protrusion of the cam 11 is out of the position engaged with the first switch 7 and the first switch 7 Is switched off. On the contrary, the second switch 6 is turned on while the protrusion of the cam 11 moves to the position of the second switch 6. At this time, the clutch 5 is operated so that the washing tank 2 is controlled in a state in which it cannot rotate.

However, when the second switch 6 is turned on, power is supplied to the motor 8 through the second switch 6, and the water used for washing is washed through the drain pipe 4 while the drain valve is opened. It is discharged to the outside.

The power supplied to the motor 8 through the second switch 6 rotates the cam 11 while continuously driving the motor 8, and at the time when the suction of the lever 9 is completed, the cam ( 11) is disengaged from the position engaged with the second switch 6, the second switch 6 is also turned off to complete the drainage operation.

As described above, the drainage device of the conventional washing machine controls the on / off of the first and second switches 6 and 7 installed in the apparatus by the mechanical operation of the cam 11 according to the rotation of the motor 8. When the switch 7 is in the on state, the clutch brake is released to generate power for the washing tub to rotate. When the second switch 6 is turned on, the water used for washing may be drained through the drain pipe 4.

That is, the conventional drainage device controls the state of the clutch 5 brake and the power of the motor 8 for drainage operation in accordance with the on / off operation of the first and second switches 6 and 7. Therefore, when the first and second switches 6 and 7 are shorted, there is no way to shut off the power of the motor 8.

In particular, in the case of the washing machine, there is a high possibility that water may penetrate into the drainage system during the drainage process, and the motor 8 continues to operate unnecessarily while the second switch 6 for the lower part is shorted from the infiltrated water. Problems can arise. Therefore, the conventional drainage device has a problem that the gear inside the motor 8 is broken along with an operation error.

Accordingly, an object of the present invention is to provide a drainage control method of a washing machine which can prevent the risk of malfunction even if a short circuit of the switch occurs due to water infiltration into the drainage device.

1 is a block diagram of a general washing machine,

2 is a configuration of the drainage shown in FIG.

3 is a drain control circuit diagram of a washing machine according to the present invention;

4 is an operation flowchart for the control of the washing machine drainage device according to the present invention.

Explanation of symbols on the main parts of the drawings

1: washing machine 2: washing tank

3: drainage device 4: drainage pipe

5: clutch 6,7: 1,2 switch

8,50 motor 9: lever

10,55: Relay 60: Microcomputer

Drainage control method of the washing machine according to the present invention for achieving the above object, the first and second switches that are controlled on / off by two-stage operation of the cam according to the rotation of the motor, the first switch is connected in series with the clutch A drainage apparatus for a washing machine having a first triac for controlling the operation of a brake and a second triac for connecting the second switch in series to control drainage operation, the drainage device of the washing machine controlling the current passage to the motor: Monitoring the completion of the two-stage operation of the cam; And stopping the operation of the second triac when the two-stage operation of the cam is completed, thereby preventing abnormal operation of the motor due to a short circuit of the second switch. Drainage control method of the washing machine according to the invention, the motor for driving the cam; First and second switches connected in series to the motor to form an input current path to the motor, and controlled on / off according to the rotation of the cam; A first triac connected to the first switch in series to control an operation of a clutch brake; A second triac connected in parallel with the first triac and in series with the second switch to control an operation of the drain valve; And a microcomputer controlling the gate terminals of the first triac and the second triac, wherein the microcomputer outputs a signal only to the gate terminal of the first triac so that the washing tub is constrained to the drive shaft and rotates when the washing tub is rotated. Is turned on to operate the clutch brake, and when draining, the microcomputer outputs a signal only to the gate terminal of the second triac, and the second switch is turned on by a cam to open the drain valve. Drainage control method of the washing machine according to the present invention for achieving the object, the motor driving the cam, each connected in series with the motor to form a passage to the motor is controlled on / off in accordance with the rotation of the cam First and second switches, first triacs connected in series with the first switch to control an operation of the clutch brake, and In the drain of the washing machine comprising a second triac connected in parallel with the first triac and connected in series with the second switch to control the operation of the drain valve, and a microcomputer to control the gate terminal of the first triac and the second triac : In the initial state, the first switch is turned on and the microcomputer outputs a signal only to the gate terminal of the first triac so that the washing tank is rotated by the operation of the clutch brake, and the second switch is turned off to close the drain valve. A first step of becoming; As the motor rotates from the first step, the first switch is turned off, the washing tank is stopped, and at the same time the second switch is turned on, the microcomputer outputs a signal only to the gate terminal of the second triac and the drain valve is opened. A second step; Upon completion of the second step, the microcomputer breaks a signal applied to the gate terminal of the second triac and breaks the abnormal operation of the motor due to the short circuit of the second switch. The drainage control method of the washing machine is characterized in that a relay is further installed between the first triac and the motor to supply power to the motor when the first switch and the second switch are turned off at the same time.

Hereinafter, a drainage control method of a washing machine according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a drain control circuit diagram of a washing machine according to the present invention.

In the drainage control circuit of the washing machine according to the present invention, as shown in the drawing, two triacs TR1 and TR2 are connected in parallel to the AC power supply terminal, and the microcomputer 60 of the gate terminals of the triacs TR1 and TR2 is connected. Is configured to control.

A first switch (S / W1) for draining the brake of the clutch at the output end of each of the triacs TR1 and TR2 and forming a current path for transmitting power to the motor 50 to allow the washing tank to rotate; In order to control the operation, the second switch S / W2 is connected to form a current path for power transmission to the motor 50. Accordingly, the motor 50 is connected to the first and second switches S / W1 and S / W2 and the other side of the AC power terminal.

The relay 55 is configured to mechanically control the supply power of the motor 50 when all of the first and second switches S / W1 and S / W2 are in an off state.

Next, an operation process for controlling the drainage of the washing machine according to the present invention having the above configuration will be described.

4 is an operation flowchart for controlling the washing machine drainage device according to the present invention. And the configuration of the drainage device required in the drainage control operation of the present invention will be described with reference to Figs.

In the initial state, the first switch S / W1 has an on state, and the second switch S / W2 has an off state (step 100). Accordingly, the brake of the clutch 5 is released by the first switch S / W1 to enable rotation of the washing tub 2 at the washing stroke. In addition, since the second switch S / W2 maintains the off state, the drain pipe 4 is in a blocked state in which water used for washing cannot be discharged to the outside.

In this initial state, power is supplied to the motor 50 through the first switch S / W1 in the on state. Therefore, when the microcomputer 60 is to transmit power to the motor 50 (step 103), the microcomputer 60 outputs a signal to the gate terminal of the triac TR1 (step 106).

The triac TR1 is turned on by the operation, and AC power is supplied to the motor 50 through the triac TR1 and the first switch S / W1 in an on state.

The motor 50 is operated when power is supplied, and the cam 11 is rotated in accordance with the rotation of the motor 50 (step 109). At this time, since the clutch 5 brake is released by the ON state of the first switch 7, the washing tub 2 can rotate. That is, the washing tank 2 is rotated as it is controlled in the above state at the washing stroke.

When the cam 11 is rotated such that the output lever 9 is sucked by a predetermined level (step 112), the protrusion of the cam 11 is out of the position engaged with the first switch S / W1. The first switch S / W1 is turned off. On the contrary, while the protrusion of the cam 11 moves to the position of the second switch S / W2, the second switch S / W2 is turned on (step 115). At this time, the clutch 5 is operated so that the washing tank 2 is controlled in a state in which it cannot rotate.

However, as the second switch S / W2 is turned on, power is supplied to the motor 8 through the second switch S / W2. Therefore, when the microcomputer 60 outputs a signal to the gate terminal of the triac TR2 (step 118), AC power is supplied to the motor through the second switch S / W2 in the on state with the triac TR2. Supplied.

At this time, while the drain valve is opened by driving the motor 50, the water used for washing is discharged to the outside of the washing machine through the drain pipe 4.

In addition, the power supplied to the motor 50 through the second switch S / W2 rotates the cam 11 while continuing to drive the motor 50 (step 121), and the lever 9 When the suction is completed, the cam 11 is released from the position engaged with the second switch S / W2 and the second switch S / W2 is also turned off to complete the drainage operation (step 124). .

As described above, when the second switch S / W2 is turned off according to the rotation of the cam, the microcomputer 60 blocks the gate signal of the triac TR2 (step 127). Therefore, even if the second switch S / W2 is shorted by moisture, the triac TR2 is turned off, and the current path to the motor 50 inside the drainage device is cut off.

In this case, the triac TR1 continues to be in an on state, so that mechanical control of the motor 50 through the relay 55 is performed.

As described above, the present invention may damage the internal gear of the motor 50 by the short state of the second switch even if the second switch is mechanically switched off according to the rotation of the cam. It characterized in that to control the series connected triac in the off state.

Therefore, the present invention provides a safer control method by performing mechanical control by a cam and electric control by a triac.

The present invention described above prevents the motor from rotating in an abnormal operation state of the switch by using a switch in which the motor in the washing machine drainage is controlled on / off by the operation of the cam and a triac connected in series with the switch. That is, even if the two-stage operation switch of the washing machine drainage is shorted by moisture, the triac is controlled to be in an off state, thereby preventing the motor from being forcibly rotated, thereby preventing gear breakage inside the motor.

Claims (4)

The first and second switches controlled on / off by two-stage operation of the cam according to the rotation of the motor, the first triac connected in series with the first switch, and the serial connection with the second switch for controlling the operation of the clutch brake. In the drainage of the washing machine having a second triac for controlling the drainage operation, to control the current path formation to the motor: Monitoring completion of a two-stage operation of the cam; And shutting off the operation of the second triac when the two-stage operation of the cam is completed, thereby preventing abnormal operation of the motor according to a short generation of the second switch. A motor for driving the cam; First and second switches connected in series to the motor to form an input current path to the motor, and controlled on / off according to the rotation of the cam; A first triac connected to the first switch in series to control an operation of a clutch brake; A second triac connected in parallel with the first triac and in series with the second switch to control an operation of the drain valve; A microcomputer controlling the gate terminals of the first triac and the second triac, The microcomputer outputs a signal only to the gate terminal of the first triac, and the first switch is turned on by the cam so that the washing tank is constrained to the driving shaft and rotates. The microcomputer outputs a signal only to the gate terminal of the second triac when draining, and the second switch is turned on by a cam to open the drain valve. The method of claim 2, And a relay is further provided between the first triac and the motor for supplying power to the motor when the first switch and the second switch are in the OFF state at the same time. A motor for driving a cam, first and second switches connected in series with the motor to form a passage to the motor, and controlled on / off according to the rotation of the cam, and connected in series with the first switch for a clutch brake A first triac controlling the operation of the first triac, a second triac connected in parallel with the first triac and connected in series with the second switch to control the operation of the drain valve, and gate terminals of the first triac and the second triac In the drainage of a washing machine consisting of a controlling microcomputer: In the initial state, the first switch is turned on and the microcomputer outputs a signal only to the gate terminal of the first triac so that the washing tank is rotated by the operation of the clutch brake, and the second switch is turned off to close the drain valve. A first step; As the motor rotates from the first step, the first switch is turned off, the washing tank is stopped, and at the same time the second switch is turned on, the microcomputer outputs a signal only to the gate terminal of the second triac and the drain valve is opened. A second step; Upon completion of the second step, the microcomputer cuts off the signal applied to the gate terminal of the second triac and breaks the abnormal operation of the motor according to the short circuit of the second switch. Way.