KR20000008886A - Control device of drain motor for washing machine - Google Patents

Abstract

PURPOSE: A control device of a drain motor for a washing machine is provided to prevent the damage of a combining unit by the mis-operation of a control unit. CONSTITUTION: The control device for the washing machine comprises: a drainage motor(11) to control a lever to deliver the power of a washing motor(2) to a washing tub; an operation end detecting unit of the drainage motor to detect the end of the operation of the drainage motor to control the lever, to open a drainage valve(5) by an operating string, and to deliver the power of the washing motor to the washing tub according to the opening of a dehydrating operation; a control unit to sequentially control the drainage motor and the washing motor by driving and by controlling the washing motor based on the detected signal of the operation end detecting unit of the drainage motor.

Description

Drainage motor control device of washing machine

The present invention relates to a drain motor control apparatus for a washing machine, and more particularly, to open and close the door of the washing machine during the dehydration operation, and again to perform the draining motor and the washing motor in order to sequentially operate the drain motor and the washing motor. It relates to a control device.

In general, a washing machine is a device that performs washing and dehydration by rotating a pulsator and a washing tank by using a rotational force of a motor.

1 is a view showing the bottom of such a general washing machine. As shown in the figure, the bottom of the water tank 1 transmits a washing motor 2, which is a power source for washing and dehydration, and the rotational force of the washing motor 2 to a pulsator (not shown) or a washing tank (not shown). The power transmission device 3 is installed. In addition, a drain hose 4 for draining the wash water is connected to one side of the bottom surface of the water tank 1, and a drain valve 5 is installed in the middle of the drain hose 4. And between the power transmission device 3 and the drain valve 5 is provided with a control device 10 for controlling them to be sequentially operated. In addition, the operation device 10 is connected to them via an operation line 7 via a link 6 to pull or release the operation line 7 to switch the power transmission device 3 and drain valve ( 5) open and close simultaneously.

Referring to the dehydration process of the washing machine configured as described above are as follows.

When the dehydration condition is determined or a dehydration command is input, the control unit (not shown) of the washing machine outputs a control signal to the drain motor driver to operate the drain motor (not shown) in the operating device 10. As a result, the operation line 7 is pulled to open the drain valve 5. At the same time, the link 6 interposed on the operation line 7 is operated so that the lever 8 of the power transmission device 3 bound to the link 6 is operated so that the power of the washing motor 2 is driven by a washing tank (not shown). The shaft coupling is manipulated so that Thereafter, the control unit outputs a control signal to the driving unit of the drainage motor, and when a predetermined time elapses, outputs a control signal to the washing motor driving unit to operate the washing motor 2 to perform a dehydration operation. And when the door (not shown) of the washing machine is opened during the dehydration operation, the power supply to the drainage motor and the washing motor 2 is automatically cut off and the dehydration operation is stopped. That is, the operation line 7 pulled by the rotational force of the draining motor is released by the restoring spring (not shown) of the drain valve 5 so that the drain valve 5 is closed and at the same time a link interposed in the operation line 7. (6) is operated to its original position, the lever 8 of the power transmission device 3 attached to this link (6) is operated so that the shaft coupling to transfer the power of the washing motor (2) to the pulsator (not shown) Manipulated. When the washing machine door is closed within the set dehydration time, power to the drain motor and the washing motor 2 is supplied again to perform the dehydration operation for the set dehydration time.

However, there were the following problems during the dehydration operation of the washing machine configured as described above. That is, when the door of the washing machine is opened and closed again, and the dehydration operation is performed again, power supply to the drainage motor and the washing motor is simultaneously performed due to a malfunction of the control unit, and the power transmission unit and the washing tank of the washing motor are axially coupled by the operation of the draining motor. There was a problem such that the coupling portion is broken as the washing motor rotates before it becomes.

The present invention has been made to solve the above-described problems, the object of which is to open the washing machine door by detecting the completion of the drain motor to open the drain valve during the dehydration operation and to operate the washing motor based on the detection result The present invention provides a drainage motor control apparatus for a washing machine that prevents damage to a coupling part due to a malfunction of a control unit when a closing and dehydration operation is performed.

1 is a view showing the bottom of a typical washing machine,

Figure 2 is a view showing the configuration of the drain valve operating device of the washing machine applied to the present invention,

3 is a plan view of the cam shown in FIG.

4 is a drain motor control block diagram according to the present invention;

5 is a time chart showing the operation of the drain motor according to the present invention.

* Description of the symbols for the main parts of the drawings *

2: washing motor 5: drain valve 11: drain motor

19: Solenoid 18: Drainage motor operation completion detection unit

18a: Cam 18b: Position detection switch 18c: Position detection groove

The configuration of the present invention for achieving the technical problem, the drain valve to maintain the closed state by the spring force, the lever for selectively switching the power of the washing motor to the washing tank or pulsator, the drain valve and the operation with the lever In the washing machine consisting of an operating device including a drain motor for connecting the lever installed so that the drain valve is opened and the power of the washing motor is transferred to the washing tank by pulling the operation line is connected through a string, the dehydration operation is The motor operation completion detection unit for detecting the completion of the operation of the drainage motor for operating the lever so that the drain valve is opened through the operation line and the power of the washing motor is transferred to the washing tank, and the motor operation detection unit The drain motor and the washing motor are sequentially controlled by driving the washing motor based on a detection signal. Characterized in that consisting of a control unit.

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

First, Figure 2 shows the configuration of the operating device applied to the present invention, the position of this operating device and the mechanical operation relationship with the other components are in accordance with the above-described FIG.

In the same drawing, the operating device 10 is largely composed of a pulley 17 in which a part of the operation string 7 is wound, and a drain motor 11 for rotating the pulley 17. A reduction gear part consisting of a plurality of gears is installed between the drainage motor 11 and the pulley 17. The reduction gear part has a driving side 12 connected to the drainage motor 11 and a driven side 15 connected to the pulley 17. Separately configured, the clutch gear 13 is provided between the drive side 12 and the driven side 15 to connect or disconnect them.

That is, the clutch gear 13 is installed to reciprocate in the axial direction by the solenoid 19 and the spring 20. Accordingly, when power is supplied to the solenoid 19, the clutch gear 13 is operated to connect the driving side 12 and the driven side 15, the power of the drain motor 11 is transmitted to the pulley 17 to drain The valve 5 is opened. In addition, when the power supply to the solenoid 19 is cut off, the clutch gear 13 is returned to its original position by the spring 20 so that the driving side 12 and the driven side 15 are separated, and the drain valve 5 has a restoring spring. It is closed by (not shown).

In addition, the drainage motor operation completion detection unit 18 is installed between the pulley 17 and the driven side 15 reduction gear to detect the open state of the drain valve (5).

That is, as shown in Fig. 3, a cam 18a is provided on the rotation shaft of the pulley 17, and a position detecting groove 18c is provided in the cam 18a so that the contact of the position detecting switch 18b is the cam 18a. Maintain constant along the surface and reaches the position detecting groove (18c) to change the contact point to detect the completion of the drain motor operation in the drain valve 5 is open.

Next, Figure 3 is a control block diagram of a washing machine according to the present invention for driving control of the operation device 10 made of the above configuration.

In the figure, 31a is a function setting unit for selecting a washing mode, 32a is a display unit for displaying the selected washing mode and the current state, 33a is a door opening and closing detecting unit for detecting opening and closing of the washing machine door, and 34a. ) Is an alarm unit for warning of washing progress and abnormal state, 18a is a drainage motor 11 operation completion detecting unit for detecting that the drain valve 5 is completely opened by the operation of the drainage motor 11, and 30 is built-in. A control unit for outputting a control signal for controlling each driving unit based on the programmed program, and a washing motor 2 and a washing motor driving unit 2a for forming and dewatering washing water flow based on the control signals of the control unit 30. , A drain motor 11 and a drain motor for operating the water supply valve 21 for supplying the wash water into the water tank 1 and the water supply valve driver 21a, and the drain valve 5 for draining the wash water in the water tank 1; A clutch for selectively switching the power of the drive unit 11a and the drainage motor 11 to the pulley 17. It comprises a solenoid 19 and the solenoid driving unit (19a) and so on for operating the gear 13.

Hereinafter, the operation of the drain motor 11 control apparatus of the washing machine according to the present invention with reference to the above-described configuration.

First, it is determined whether the dehydration start condition, and if the dehydration start condition, the control unit 30 outputs a control signal to the solenoid drive unit 19a and the drain motor 11 drive unit. Accordingly, the clutch gear 13 is operated by the solenoid 19 to connect the driving side 12 and the driven side 15, and the drain motor 5 is operated to transmit the rotational force to the pulley 17. . Thus, the operation line 7 is pulled to open the drain valve 5. At the same time, the link 6 interposed on the operation line 7 is operated so that the lever 8 of the power transmission device 3 bound to the link 6 is operated so that the power of the washing motor 2 is driven by a washing tank (not shown). The shaft coupling is manipulated so that At this time, if the contact of the drainage motor operation completion detection unit 18a is changed by the position detecting groove 18b while the cam 18 coupled to the rotation shaft of the pulley 17 rotates, the electrical signal corresponding thereto is controlled by the control unit 30. Is applied to the control unit 30 determines that this is the completion of the opening of the drain valve 5 and outputs a control signal to the washing motor driving unit (2a). Accordingly, the washing motor 2 is rotated, the rotational force is transmitted to the washing tank (not shown) to perform the dehydration operation.

In addition, when the door of the washing machine is opened during dehydration, it is detected by the door open / close detection unit 33a and an electrical signal is applied to the control unit 30. The control unit 30 detects this as a door opening and outputs a control signal to the washing motor driving unit 2a and the drainage motor driving unit 11a. Accordingly, the power supply to the washing motor 2 and the draining motor 11 is cut off, the dewatering operation is stopped, and the drain valve 5 is closed.

That is, since the clutch gear 13 is returned to its original position by the spring 20, the driving side 12 and the driven side 15 are separated, and the force of the restoring spring of the drain valve 5 overcomes the bite of the gear. The operation line 7 pulled by the pulley 17 is released to close the drain valve 5. In addition, the link 6 interposed between the operation line 7 is operated to its original position, and the lever 8 of the power transmission device 3 coupled to the link 6 is operated to operate the power of the washing motor 2. Axial coupling is manipulated to be delivered from a pulsator (not shown) (not shown).

In addition, when the washing machine door is closed within the set dehydration time, the dehydration operation is further performed for the remaining time.

That is, as described above, the solenoid 19 and the drain motor 11 are operated to open the drain valve 5, and at the same time, the shaft coupling is operated so that the power of the washing motor 2 is transmitted to the washing tank (not shown).

In addition, when it is determined that the operation of the drain motor 11 is completed by the drain motor operation detecting unit 18a, the controller 30 controls the washing motor 2 to perform a dehydration operation.

Then, when the set dehydration time is reached, the control unit 30 cuts off the power supplied to the solenoid 19 and the drain motor 11 and the washing motor 2 to complete the dehydration operation.

Next, Figure 4 shows the operation of the drain motor 11 and the washing motor 2 as a time chart, delay time (D / T; Delay between the driving time of the drain motor 11 and the washing motor 2) Time) to prevent the drainage motor 11 and the washing motor 2 from operating at the same time.

Here, the D / T time is the time when the drain motor 11 is driven and the operation completion of the drain motor 11 is detected by the drain motor operation completion detection unit 18a.

As described in detail above, according to the present invention, the washing machine door is opened and closed so that the washing motor is operated based on the detection result of detecting the completion of the drain motor that opens the drain valve during the dehydration operation. Even in this case, the drainage motor and the washing motor are operated in sequence, thereby preventing the damage of the coupling part due to their simultaneous operation.

Claims (2)

By draining the valve to maintain the closed state by the spring force, the lever for selectively switching the power of the washing motor to the washing tank or pulsator, and the drain valve and the lever and the operating line is installed through the pull In the washing machine comprising an operating device including a drain motor for opening the drain valve and operating the lever so that the power of the washing motor is transferred to the washing tank, As the dehydration operation is started, the drainage valve operation completion detection unit for detecting the completion of the operation of the drainage motor for operating the lever so that the drain valve is opened and the power of the washing motor is transferred to the washing tank through the operation line; And a control unit configured to sequentially control the draining motor and the washing motor by controlling the washing motor based on a detection signal of the draining motor operation completion detecting unit. According to claim 1, The drain motor operation completion detection unit, A cam that rotates in conjunction with a pulley pulling the operation line by the rotational force of the drain motor and has a position sensing groove formed on its outer circumference; The drain motor control device of the washing machine comprising a position detection switch connected to the control unit so that the washing motor is driven and controlled by the control unit by outputting a position detection signal as the contact point is changed by the position detection groove of the cam. .