JPH03140192A - washing machine control device - Google Patents

Abstract

PURPOSE:To suppress the occurrence of an abnormal tone in a restart operation and to improve goods performance by detecting the revolution of a motor when the temporary stoppage of the motor occurs in dehydration, and controlling delay time. CONSTITUTION:While the dehydration is being performed, the motor 6 and a dehydration valve driving means 8 are energized, however, when a cover 12 is opened and a cover switch 13 is opened, a control means 14 stops the energizing of the motor 6 and the dehydration valve driving means 8, and simultaneously, the output of a rotation detecting means 21 is monitored. In the case of expressing the revolution state of the motor 6 with the output of the rotation detecting means 21 when the cover 12 is closed again, the restart of the energizing of the dehydration valve driving means 8 is awaited, and the energizing of the dehydration valve driving means 8 is performed after the output of the rotation detecting means 21 shows the stoppage of the motor 6. Furthermore, the time is delayed by a time (t), and the energizing of the motor 6 is performed after a switching mechanism 7 is completely switched, which suppresses the occurrence of the abnormal tone.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for an electric washing machine using a control means such as a microcomputer.

BACKGROUND ART Conventionally, in a control device for this type of washing machine, for example,
When the lid is opened during dewatering, the power to the drain valve driving means and motor is cut off, and the lid is closed again.

The power to the drain valve drive means and the motor will be restarted, but if you do not energize the motor after the drain valve drive means has completely switched between washing and dewatering, there is a risk that a loud noise will be generated. Ta.

Therefore, as shown in FIG. 9(a), when the lid is opened and then closed again, the drain valve is first opened (energized to the drain valve driving means) as shown in FIG. 9(b). Then, as shown in FIG. 9(c), the motor was energized after a delay long enough to completely switch to dehydration.

Problems to be Solved by the Invention However, in recent years, attention has been focused on making washing machines quieter, and it has become necessary to reduce even the momentary sound when switching, so the structure described above is not sufficient. lost.

In other words, if the lid was opened during dewatering, the motor completely stopped, and then the lid was closed again, there would be no problem with the conventional method shown in Figure 9. If the lid is closed before stopping, the drain valve driving means will be energized while the motor is rotating.

In this case, the problem has become clear that loud noises are generated from the clutch portion of the switching mechanism. In particular, in order to reduce noise, a geared motor type was used instead of the conventional plunger type as the drain valve drive means.
It takes time to switch the mechanism and it is pulled slowly,
The sound when switching was more noticeable, which was a problem.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a washing machine control device that suppresses the generation of abnormal noise when the motor is temporarily stopped due to opening and closing of the lid during dehydration.

Means for Solving the Problems In order to solve the above problems, 1. the washing machine control device of the present invention comprises: a motor for rotationally driving a washing and dehydration tub; a switching means for switching between washing and dehydration; and 5. the switching means. and a drain valve driving means for driving the drain valve.

a switch for instructing the motor to temporarily stop; a rotation detecting means for detecting rotation of the motor; controlling energization of the motor and drain valve driving means, and when the switch instructs the motor to temporarily stop; The apparatus further includes a control means for controlling a delay time when re-energizing the drain valve driving means and the motor in accordance with an output signal of the rotation detecting means.

Effect With the above-described configuration, for example, the output signal of the motor rotation detection means is monitored after the lid is opened during dehydration, and if the motor is still rotating when the lid is closed again, Switching means for switching between washing and dewatering by controlling the drain valve driving means to resume energization after waiting for the motor to stop rotating or after the motor has slowed down to a speed that does not cause problems with the generation of noise. This prevents noise from being generated from the clutch part.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram of a control device in a washing machine according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a main part of the control device, and FIG. 3 is a sectional view showing the configuration of the washing machine.

In Fig. 3, 1 is a washing and dehydration tank, 2 is a rotary blade provided at the bottom of the washing and dehydration tank 1, 3 is a tube provided on the outside of the washing and dehydration tank 1, 4 is a support rod, 5 is a main body, 6 is a motor provided at the bottom of the main body 5, 7 is a switching mechanism for switching between washing and dehydration, and 8 is a drain valve 10 connected to a drain hole 9 at the bottom of the tube 3 and a switching switch. A drain valve driving means for operating the mechanism 7, 12 a lid, 13 a lid switch that opens and closes in conjunction with the opening and closing of M12, and 14 a control means.

In this configuration, during washing, the motor 6 is energized, the drain valve driving means 8 is not energized, the switching mechanism 7 is switched to the washing side, and the rotation of the motor 6 is transmitted only to the rotary blade 2. On the other hand, when the dewatering operation starts, both the motor 6 and the drain valve drive means 8 are energized, the switching mechanism 7 is switched to the dewatering side, and the rotation of the motor 6 is transmitted to the washing/spindle tank 1, causing the entire tank to rotate. , the drain valve 10 is opened to drain water. At that time, when the lid 12 is opened, the lid switch 13 is opened,
The signal is transmitted to the control means 14, and dehydration is temporarily stopped.

In FIG. 1, the motor 6, drain valve driving means 8, lid switch 13, and control means 14 are the same as the respective elements explained in FIG. 3. 15 is a water supply valve for supplying washing water; 16 is a switching device for controlling energization of the motor 6, drain valve drive means 8, and water supply valve 15 in response to a signal from the control means 14;

17 is a power supply; 18 is a power supply circuit that creates a low-voltage power source for driving the control means 14 from the power supply 17; 19 is a water level detection means for detecting the water level in the tank; and 20 is an operation display device consisting of SW, LED, etc. . Reference numeral 21 denotes rotation detection means for transmitting the rotational state of the motor 6 to the control means 14.

Fig. 4 is a timing chart showing the state of control when M12 is opened and closed during dewatering, Fig. 4(a) shows the state of the output signal of the lid switch 13, and Fig. 4(b) shows the drain valve driving means. 4(c) is a waveform diagram showing the state of energization to the motor 6, and FIG. 4(d) is a waveform diagram showing the state of the rotation detection output signal of the rotation detection means 21.

Next, the operation in the above configuration will be explained. During dewatering, the motor 6 and the drain valve driving means 8 are energized, but when the MI 2 is opened or the nine-lid switch 13 is opened.

The control means 14 stops energizing the motor 6 and the drain valve drive means 8, and at the same time monitors the output of the one-rotation detection means 21. When the lid 12 is closed again, if the output of the rotation detection means 21 still indicates the rotation state of the motor 6 as shown in FIG. Wait until the output of the rotation detection means 21 is detected by the motor 6.
After indicating the stoppage of the drain valve drive means 8, the drain valve driving means 8 is energized, a time delay is further delayed, and after the switching mechanism 7 has completely switched, the energization to the motor 6 is resumed, thereby suppressing the generation of noise.

FIG. 2 is a circuit diagram showing an example of the rotation detection means 21,
The voltage at the terminals of bidirectional thyristors 22 and 23 connected to the motor 6 to control the rotation of the motor 6 is transmitted to the control means 14 via the photocoupler 24. 5 and 6 show the specific waveform diagrams, (a) is the output signal of the lid switch 13, (b)
is the voltage at the terminals of bidirectional thyristor 22゜23, CC)
indicates an output signal from the photocoupler 24 to the control means 14. In FIG. 5, the output signal (a
) is opened, the energization to the motor 6 is stopped, the voltage (b) of the bidirectional thyristor 22, 23 gradually decreases as the motor 6 rotates, and the output signal (c) of the photocoupler 24 decreases as the motor 6 rotates. Until it stops, it becomes a pulse-like waveform as shown in the figure.

In other words, it is only necessary to wait for this output signal (c) to disappear before outputting it to the drain valve driving means 8.

FIG. 7 is a flowchart showing the state of this control.

FIG. 6 shows a waveform diagram of another example of bidirectional thyristor 2.
The period of the voltage (b) of 2.23 gradually expands as the rotation speed of the motor 6 decreases, and the voltage (b) of the photocoupler 2
The width of the pulse of the output signal (c) of No. 4 is expanded. Therefore, it is possible to suppress the sound generation by monitoring the waveform of the output signal (c) of the photocoupler 24 and moving to the next control after the rotation of the motor 6 has decreased to a speed that does not cause any problem in the generation of sound. It becomes possible.

FIG. 8 is a flowchart showing the state of this control.

The above explanation has been about the control when temporarily stopping water dehydration by opening and closing the lid 12, but it is also possible to temporarily stop and restart water dehydration using a pause switch connected to the control means. The same thing can be done for control, and similar effects can be obtained.

Effects of the Invention As described above, according to the washing machine control device of the present invention, when the motor is temporarily stopped during dehydration, by detecting the rotation of the motor and controlling the delay time, it is possible to detect the rotation of the motor and control the delay time. The generation of abnormal noise can be suppressed, making washing machines quieter.
Furthermore, marketability can be improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a control device in a washing machine according to an embodiment of the present invention, Fig. 2 is a main circuit diagram of the control device, Fig. 3 is a sectional view showing the configuration of the washing machine, and Fig. 4 is a block diagram of a control device in a washing machine according to an embodiment of the present invention. 5 and 6 are waveform diagrams of the main parts of the control device, FIG. 7 and 8 are flowcharts showing the control state of the control device, and FIG. 9 is a conventional example. FIG. 6... Motor, 7... Switching mechanism, 8... Drain valve driving means, 9... Drain valve, Summer 2... Lid, 13... Lid switch, 14... Control means, 16... Switching device 521... Rotation detection means, 22.23... Bidirectional thyristor, 24... Photo coupler

Claims (1)

[Claims] 1. A motor for rotationally driving a washing and dehydrating tank, a switching means for switching between washing and dehydration, a drain valve driving means for driving the switching means and a drain valve, and a switch for instructing the motor to temporarily stop; A rotation detecting means for detecting the rotation of the motor, controlling energization of the motor and the drain valve driving means, and when the switch instructs temporary stop of the motor, the rotation detecting means detects the rotation of the motor according to an output signal of the rotation detecting means. A washing machine control device comprising a drain valve drive means and a control means for controlling a delay time when re-energizing the motor.