KR950007082B1 - Door lock apparatus and control method thereof - Google Patents

Abstract

a door lock means for mechanically controlling the opening and shutting of a washer tub's door; and a door lock driving means for locking or releasing the door lock means so as to open the door under the control of a micom.

Description

Door lock device and door lock control method of washing machine

1 is a block diagram of a control circuit of a conventional washing machine.

2 is a flowchart showing a washing control process of a conventional washing machine.

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

4 is an exploded perspective view of the washing machine and the door according to the present invention.

5a and 5b are cross-sectional views of the door lock operating state of the present invention.

6 is a flowchart showing the door lock control method of the present invention.

* Explanation of symbols for main parts of the drawings

1: microcomputer 10: door lock means

11: door lock driving means 13: solenoid

14: washing tank door 15: lock groove

The present invention relates to a door lock device and a door lock control method of opening and closing a washing tank (dehydration tank) door of a washing machine of the present invention. The present invention relates to a device and a control method for releasing the door lock after locking it so that it cannot be locked and reaching the safety temperature of the washing water.

In the conventional washing machine, washing is performed in a state in which hot water (60 ° C. or more) is supplied to increase the washing rate. In particular, in the case of a washing machine employing a boil- ing washing course, the laundry is boiled at a high temperature. Inadvertently opening the washing tank (dehydration tank) door has a problem that the high temperature steam that is filled in the washing tank is instantaneously discharged and there is a risk of burns.

1 is such a conventional washing machine control circuit configuration.

That is, the microcomputer 1 for controlling overall washing (including dehydration and rinsing) stroke, the display and display driving unit 2 for displaying the washing machine operating state, the switch operating unit 3 for operating the washing machine, and the washing machine. Water level detection unit (4) for detecting the water level, door switch (5) for detecting the opening and closing of the washing tank door, load driving unit (6) for driving the washing motor, valves, heaters, etc. A unit 7, an interrupt and reset unit 8 for performing interrupt and reset control necessary for washing control, and a power source unit 9 for supplying power. Same as

When the device power is supplied from the power supply unit 9, the microcomputer 1 is initialized by the interrupt and reset unit 8, and when the user instructs washing through the switch operating unit 3, the microcomputer 1 displays and displays the driving unit. Water supply is performed according to the quantity detected by the quantity detecting unit 7 while displaying the current operation state through (2), and washing through the load driving unit 6 while controlling the water supply to a constant level with the water level detecting unit 4. Washing is performed by controlling the motor, supply / drain valve and heater.

When the washing is completed, drainage is performed, and the on / off state of the door switch 5 determines whether the washing tank door is opened or closed.If the washing tank door is opened, it is determined whether the door is closed within a set time (for example, 10 minutes). If it is not closed, alarm sound is generated and notified to the user. If the door of the washing tank is closed, dehydration is performed and then the power is turned off to finish the whole washing administration.

Therefore, in the prior art, only the monitoring of the door opening and closing of the washing tank door in the previous step of the dehydration administration and the alarm is not made to control the opening and closing of the door by monitoring the washing water temperature.

Therefore, the user can open the door of the washing tank arbitrarily even though the steam generated when hot washing water is used in the water supply stage or the heating step of the washing of the washing course is filled in the washing tank. As it is emitted instantaneously, there is a risk of getting burned.

The present invention locks the washing tank door can not be opened arbitrarily when the burn temperature is higher than the burn temperature in the water supply stage of the hot water, release the door lock after proceeding washing and rinsing and dehydration in this state, in the case of boiled laundry course locked the washing tank door first The door lock of the washing machine that eliminates the risk of burns caused by high temperature water vapor by lowering the water temperature and releasing the door lock through the re-water supply after boiling the heater by heating the heater An object of the present invention is to provide an apparatus and a door lock control method, which will be described below with reference to the accompanying drawings.

Referring to FIG. 3, the door lock device of the washing machine of the present invention includes a microcomputer 1 for controlling overall washing (including dehydration and rinsing) stroke, a display and display driver 2 for displaying the washing machine operating state, and a washing machine. Switch operation unit (3) for operation, the water level detection unit (4) for detecting the water level in the washing tank, the door switch (5) for detecting the opening and closing of the washing tank door, load for driving the washing motor, valve, heater, etc. A drive unit 6, a quantity detection unit 7 for detecting a washing quantity, an interrupt and reset unit 8 for performing interrupt and reset control necessary for washing control, a power supply unit 9 for supplying power, Door lock means 10 for physically controlling whether the washing tank door is opened or closed, and the door lock driving means 11 that locks or releases the door lock means 10 so as not to open the washing machine door by driving the door lock means 10 under the control of the microcomputer 1. It is composed of

Meanwhile, referring to FIGS. 4 and 5, the door lock means 10 includes a solenoid 13 performing a door lock / unlock on one side wall of the door of the washing machine 12 and the operation of the solenoid 13. The shaft 13A is thus inserted and separated to constitute a lock groove 15 to control the opening and closing of the washing tub door 14.

Meanwhile, in FIG. 3, the door lock driving means 11 includes an inverter 11A for inverting the door lock driving control signal of the microcomputer 1 and a power switching for supplying or blocking the door lock driving power by the inverted control signal. A part 11B and a rectifying and smoothing part 11C which converts the supplied door lock driving power into direct current and supplies it to the door lock means 10.

In FIG. 3, reference numeral Q1 is a transistor, Q2 is a triac, C1 and C2 are capacitors, R1 to R4 are resistors, and ACV and VCC are power sources. In FIG. 5, 13B is a solenoid shaft 13A restoring spring, and 13C is a solenoid coil.

The door lock control operation by the washing machine door lock device of the present invention configured as described above is as follows.

As shown in FIGS. 3 and 6, when the device power is supplied from the power supply unit 8 and the microcomputer 1 is initialized by the interrupt and reset unit 8, the microcomputer 1 opens the door lock to the door lock driving means 11. The door lock driving means 11 which outputs the drive control signal and receives the control signal releases the door lock means 10 so that the user can open the door.

That is, since the microcomputer 1 outputs a low signal to the inverter 11A, the transistor Q1 is turned off and the triac Q2 of the power switch 11B is turned off. ACV) is cut off, and accordingly, the output of the rectifying and smoothing part 11C becomes 0 volts, so that power is not supplied to the door lock means 10.

That is, since no current flows in the solenoid coil 13C as in FIGS. 4 and 5b, the solenoid 13 does not operate, and the solenoid shaft 13A is operated by the elastic force of the spring 13B. Since it is separated from the door lock groove 15 of the side wall, in this state, the washing tub door 14 can be opened and closed freely.

In this way, when the user puts the laundry in the washing tank, closes the washing tank door 14, and turns on the washing operation key of the switch operating unit 3 in FIG. 3, the microcomputer 1 determines whether the door switch 5 is on or off. do. If the door switch 5 is turned off, the display and the display driver 2 warn that the door 14 is open. If the door switch 5 is turned on, the door 14 is closed to determine that the door 14 is closed. Open the water supply valve through 6) performs water supply in the washing tank to the set water level detected by the water level detection unit (4), at this time detects the amount of water from the quantity detection unit (7) to set the washing time and water level.

Initially, the washing water introduced through the water supply valve is hot water in order to increase the washing rate. Therefore, it is determined whether the temperature of the hot water is a burn hazard temperature (eg, 60 ° C.). 11) by driving the door lock means 10 to lock the washing tank door 14 can not be opened arbitrarily.

That is, since the transistor Q1 is turned on when the microcomputer 1 outputs a high signal, the low signal inverted by the inverter 11A is applied to the gate of the triac Q2 so that the triac Q2 is turned on. The switching unit B supplies the power supply ACV to the rectifying and smoothing unit 11C, rectified by the diodes D1-D4 and smoothed by the capacitor C2, as shown in FIG. 5A, the solenoid coil 13C. Is supplied.

Accordingly, the solenoid 13 is operated so that the solenoid shaft 13A overcomes the elastic force of the spring 13B and enters the door lock groove 15 to lock the washing tank door 14 so that it cannot be opened.

After performing the door lock in this way, after washing, draining, rinsing, and dehydrating through the load driving unit 6, the door lock means 10 is driven through the door lock driving means 11 to open the door as shown in FIG. Release the door lock to open 14) and finish the washing.

On the other hand, if the water supply temperature is determined as the burn risk temperature of 60 ℃ or less, it is determined whether or not the washing course.

If the user selects the boil-off washing through the switch operating unit 3, the microcomputer 1 performs the door lock through the door lock driving unit 11 as shown in FIG. 5A and turns on the heater through the load driving unit 6 to boil it. After the completion of the heating process by intermittent washing while the heating is completed until the completion of the cold water is supplied to lower the water temperature and then release the door lock as shown in 5b.

After the door lock is released, washing and draining are performed, and in order to prevent the user from opening the door 14 during rinsing and dehydration, the door lock is preceded, followed by rinsing and dehydration, and the door lock is released to terminate the washing.

On the other hand, when the boil-off washing course is determined that boil-off washing is not selected, the boil-off washing process is omitted, and the process of washing, draining, door lock, rinsing, dehydration, door lock release, and washing ends.

As described above, according to the present invention, when the water temperature supplied during the washing machine is sensed, if the temperature of the burnable temperature is higher, the door of the washing tank is not opened during washing, and the boil-off washing prevents the door opening during heating. To increase.

Claims (8)

Door lock means (10) for physically controlling the opening and closing of the washing tank door, and the door lock drive means for driving the door lock means (10) under the control of the microcomputer (1) to lock or release to prevent the washing machine door from opening. The door lock device of the washing machine consisting of. According to claim 1, The door lock means 10, the solenoid 13 to perform the door lock / release on one side wall of the door of the washing machine 12, and the shaft 13A according to the operation of the solenoid 13 The door lock device of the washing machine comprising a lock groove (15) which is inserted and separated to control the opening and closing of the washing tank door (14). The door lock driving means (11) is an inverter (11A) for inverting the door lock driving control signal of the microcomputer (1), and a power switch for supplying or blocking the door lock driving power by the inverted control signal. A door lock device for a washing machine comprising a part (11B) and a rectifying and smoothing part (11C) for converting the supplied door lock driving power into a direct current and supplying it to the door lock means (10). Detecting the water temperature supplied to the washing tank and comparing it to a set temperature at which there is a risk of burn; and if the detected temperature is higher than the set temperature, performing a door lock to prevent the washing tank door from opening and setting the detected temperature as a result of the comparison. If the temperature is less than the door lock control method of the washing machine consisting of proceeding the washing course without performing the door lock. The method according to claim 4, wherein when the detected temperature is less than the set temperature as a result of the comparison between the sensing temperature and the set temperature, it is determined whether the washing course is boiled, the door lock is performed in the case of normal washing and the door lock is not performed in the case of general washing. Method of controlling the door lock of a washing machine comprising a course of course. The door lock control method according to claim 4 or 5, wherein the release time of the door lock is set to a step in which a washing process in which a sensing temperature is out of a dangerous temperature of an image is performed. The door lock control method according to claim 6, wherein the release timing of the door lock is set at a stage after the final dewatering process. The door lock control method of a washing machine according to claim 6, wherein the washing machine is set at a stage after the rewatering process in which cold water is supplied to the laundry boiled in the release timing of the door lock.