JPS62204792A - Controller of washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a washing machine control device. [Conventional technology] An example of a conventional washing machine control device is shown in FIG. 7 and will be described.

In the figure, 1 is a washing tub motor, 1 m, 1b is 10 windings of this motor, 2 is a starting capacitor, and 3a.

3b is a bidirectional thyristor switch (TRIAC),
4m and 4b are photo-triac light receiving parts, 4c and 4d
is the light emitting part of the photo try book.

In addition, the capacitor 51, the resistor 6a, and the capacitor 5b
and resistor 6b form an absorber.

T is the washing machine control unit, 7m and 7b are each output of this washing machine control unit T, 8 is the power switch, 9 is the contact of the self-holding relay, 10 is the AC100V (50/60H2) power supply, 11 is the to (7) ) This is a varistor connected in parallel to the AC 100V power supply 10.

This washing machine has an agitation rotating body (not shown) in a washing tub (not shown), and this rotating body is powered by the electric motor 1 by means of a V-groove pulley, a V-belt, etc. (not shown). The rotation direction is configured such that the direction of rotation is repeatedly reversed at a predetermined period.

Next, the operation of the washing machine control device shown in FIG. 7 will be explained with reference to FIG. 8.

This FIG. 8 is a time chart of washing machine control to provide an explanation of the operation of FIG.
The respective output voltages of the output cuffs a and γb, (d), (@
) show the voltage waveforms at point A and point B, respectively.

First, the washing tub motor 1 is normally a single-phase induction motor, and has independent windings it and 1b for clockwise rotation and counterclockwise rotation.

Then, the relay contact 9 is self-held by the power switch 8, thereby forming an operating circuit for the washing machine.

Next, signals are alternately sent to the light emitting parts 4c and 4d of the photo triac by the washing machine control part 7, and the bidirectional thyristor switches 3a and 3b are activated by turning on and off the light receiving parts 4m and 4b of the photo triac. It is turned on and off.

As a result, when the directional thyristor switch 3a becomes conductive, the winding 11L becomes the main winding, and the multi-winding 1b
serves as an auxiliary winding, and a current having a phase different from that of the main winding flows through the starting capacitor 2, generating a rotating magnetic field and starting the washing tub motor 1. In addition, the bidirectional cyrisk switch 3b
When becomes conductive, winding 1b becomes the main winding, and winding 1
m becomes the auxiliary winding, and the bidirectional thyristor switch 3
When a is in a conductive state, a rotating magnetic field opposite to that generated is generated, and the washing tub motor 1 is reversed. While the bidirectional thyristor switches 3m and 3b are alternately turned on, they are both turned off for a predetermined period of time.

FIG. 8 shows this as a time chart.

[Problem that the invention seeks to solve]

Since the conventional washing machine control device described above is configured as described above, there is a problem in that the large current consumption of the washing tub motor has an adverse effect on household electrical appliances. Ta.

FIG. 9 is a schematic diagram showing the wiring in a home.

In the figure, 12 is a main breaker, and 13m and 13b are auxiliary breakers after branching, which usually have a capacity of 15A or 20A. 14 a p 14 b are lighting equipment, 15
Todoroki.

15b is a light switch, 16 is an outlet, 17 is a stand, and 18 is a washing machine.

In a typical home, the wiring that is brought indoors is branched into several systems via the main breaker 12.
Each household electrical appliance is connected to a small capacity auxiliary breaker 13m, 13b. For example, when the washing machine 18 is operated with power supplied from the outlet 16, if power is supplied to the stand 17 from the same outlet 16 or the same branched system, the current consumption of the washing machine 18 may cause the wiring The voltage at the outlet 16 drops by the product of the system impedance and the current, and the lighting becomes dark under the influence of the dropped voltage.

Also, like a washing machine, it can be turned on and off every time the electric motor is reversed.
If this is repeated, the power supply voltage at the outlet 16 will repeatedly rise and fall in accordance with the ON-OFF cycle. Therefore, the lighting equipment also flickers in brightness.
will occur at the same period. Furthermore, in homes with poor wiring such as outdoor service lines, rather than indoors, this also affects the lighting fixtures 14m and 14b of other systems in the home, causing flickering of the lighting. Furthermore, like a washing machine, the 0N-OF cycle is relatively easy to perceive with human vision.
It can be said that those that repeat F are at a disadvantage compared to other appliances that exhibit similar power supply voltage drops.

Figure 1O shows the state at this time, where (a) shows the combined current waveform of the washing machine 18 and the stand 17, and (b) shows the combined current waveform of the washing machine 18 and the stand 17. A waveform representing a change in illuminance (C) shows a change in the power supply voltage (effective value) at the outlet 16.

Note that 0) indicates only illumination, and (b) indicates the amount of variation in illuminance 1
Δ1lx(, (c) indicates the variation amount 1Δv1 of the power supply voltage.

According to Fig. 10, the current shows a rapid drop in both the pressure and the illuminance due to the starting current of the washing tub motor 1 (between to-11 and tO'-tl'), and the illuminance shown in (b) The magnitude of the fluctuation amount 1Δlxl of the power supply voltage and the magnitude of the fluctuation amount 1Δv1 of the power supply voltage shown in (c) becomes easier to visually perceive between larger shims as the wiring situation worsens. Then, when the motor eventually rises to the synchronous speed, the motor current becomes a steady current and decreases, and the power supply voltage and illuminance recover somewhat (between tl and tz and between t
l'-t2'). Then, when one rotation of the electric motor is completed and the power supply to the electric motor is stopped (between tz-to' and t
After z', the power supply voltage and illuminance return to their original state, and when the motor enters the reverse state, the same state repeats.

This invention was made to solve this problem, and as in the conventional case, even if a fluctuation amount of 1ΔV1 in the power supply voltage or a fluctuation amount of 1ΔII, l in illuminance occurs, it is difficult for humans to visually perceive it, causing a single flicker in the lighting equipment. The purpose of the present invention is to obtain a washing machine control device that eliminates the feeling of dryness.

[Failure to solve the problem]

The washing machine control device according to the present invention applies half-wave rectified current to the motor before applying current to the motor, applies an alternating current to give rotation to the motor, and repeats this nine times in accordance with the reversal cycle. This is what I did.

In addition, in the washing machine control device according to another aspect of the present invention, even when stopping the energization to the electric motor, the second half wave rectification of the alternating current component that rotates the motor continues after the energization ends. The power is turned on and then the power is turned off.

[Effect]

In this invention, each time an AC voltage is applied to the washing machine motor, a half-wave rectified voltage is applied immediately before or before AC application, or when stopping electricity to the motor.
To reduce the rate of drop in power supply voltage and illuminance of lighting equipment, and eliminate the flickering sensation of lighting from human vision.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a circuit diagram showing an embodiment of a washing machine control device according to the present invention.

In Fig. 1, the same symbols as in Fig. 7 indicate corresponding parts, 9m and 9b are the contacts of the self-holding relay, 19 is the cooling fan, and 20 is the fan motor. The operation of the example will be explained with reference to FIGS. 2 to 4.

Fig. 2 is a time chart when applying half-wave rectification to the electric motor before applying AC current, in which (a) shows the power supply voltage waveform, and (b) shows the output cuff a or 7b output signal, (C) is the voltage waveform at point A or point B,
That is, it shows the voltage waveforms applied to the windings 1m and 1b.

Figure 3 is a waveform diagram showing the current waveform and illuminance change waveform in the case of Figure 2, (→ indicates the current waveform,
(b) shows a waveform of changes in illuminance. and,
) shows only the illumination, (e) shows the inversion, and (f) shows the conventional case.

First, the light emitting parts 4e and 4d of the photo triac are made conductive by the alternating output signals of the output cuff a and the output cuff b of the washing machine control part 7, and the light receiving parts 4m and 4b of the photo triac are alternately ONl, . Basically, the bidirectional thyristor switches 3m and 3b are turned on and the washing tub motor 1 is repeatedly reversed, as in the conventional example shown in FIG.

A washing machine control section 7 that is involved in the rotation of this electric motor 1
The signal at the output cuff a at time t in FIGS. 2 and 3
6 to t7, during which the bidirectional thyrisk switch 3
When m is a conductive state, an AC sine wave is applied to the motor 1 (voltage waveform at point A between t6 and ty)0 Furthermore, the control in this invention is such that an AC voltage is applied to the washing tub motor 1. Also, half-wave rectification is applied several tens of cycles before the power supply frequency (5 cycles in this example), and then the AC voltage is applied.

That is, in FIG. 2, the time t for applying the AC voltage
6, half-wave energization is started from time tx, which is several cycles before the power supply frequency. FIG. 3 shows the current waveform and the change waveform of the illuminance of the lighting equipment at this time. According to Tore,
Changes in illuminance begin to gradually decrease after half-wave energization begins, and the rate of change ("F'E-" or "1AL") is slower than in conventional washing machines, making it difficult to detect with human vision. Furthermore, the longer the half-wave energization time is, the more advantageous it becomes, and if the 200m type to 300m5ec or more, there will be almost no change in the lighting in a general home.

What has been described above is exactly the same regarding the output cuff b of the washing machine control section 7. In addition, since it is half-wave energization, that is, direct current, no starting torque is given to the motor, and the operation of the motor is the same as before, so there is no need to worry about affecting washing performance. As a result, the motor is energized, so the inrush current when starting the motor is small, and the absolute value of fluctuations in power supply voltage and illuminance of lighting equipment can also be kept small, which has great effects. .

In the embodiment shown in FIG. 1, a cooling fan 19 and a seven-arm motor 20 are provided in order to suppress the temperature rise of the motor during half-wave energization.

If the control described above is made into a flowchart, it will become as shown in FIG. 4, with 0101 to 111 representing each step.

In addition, in the above embodiment, a case was explained in which half-wave rectification is applied before applying AC current to the motor, but half-wave energization is also performed when the motor is stopped, and the power supply voltage that has dropped due to the stop of the motor is By slowly returning the illuminance of the lighting equipment, flickering 1 of the lighting equipment can be further eliminated.

In other words, Fig. 5 shows this state, and is a time chart when half-wave rectification is applied before and after AC energization to the motor.In this Fig. 5, (1) shows the waveform of the power supply voltage. (b) shows the output signal of the output cap or output cuff b of the washing machine control section 7, and (C) shows the voltage waveform at point A or point B.

As is clear from the time chart shown in Fig. 5, after stopping AC current to the motor, half-wave rectification current is applied for several cycles to several tens of cycles (5 cycles in the example).
Figure 6 shows the current waveform at this time and the changing waveform of the illuminance of the lighting equipment. In FIG. 6, (&) shows the current waveform, and (b) shows the changing waveform of the illuminance of the lighting equipment. (g) indicates the inversion, and (to) indicates the conventional case.

According to the control shown in Fig. 6, the illuminance rises gradually after the motor stops, eliminating the flickering sensation from human vision, and the longer the half-wave energization time is, the more advantageous it becomes. .

〔Effect of the invention〕

2. As explained above, according to the present invention, the half-wave rectified portion that does not apply rotational torque to the motor before starting the washing machine motor or before starting and after stopping is applied in an electric manner, so that the power supply voltage and lighting Slow down the rate of change in fixture illumination,
It is possible to eliminate the visual sensation of flickering, and the device itself can be processed by simply changing the microcomputer program, which has the effect of keeping the cost down to a lower level than conventional products.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the washing machine control device according to the present invention, Fig. 2 is a time chart when half-wave rectification is applied to the motor before AC current is applied, and Fig. 3 is the case of Fig. 2. FIG. 4 is a flowchart showing the control in FIG. 2, FIG. 5 is a time chart when half-wave rectification is applied before and after AC energization to the motor, and FIG. The figure is a waveform diagram showing the changing waveforms of current and illuminance in Fig. 5, Fig. 7 is a circuit diagram showing an example of a conventional washing machine control device, Fig. 8 is a time chart of conventional washing machine control, and Fig. 9 1 is a diagram showing the wiring state of a general household, and FIG. 10 is a waveform diagram showing current, illuminance, and voltage waveforms during operation of a conventional washing machine. 1...Washing slide electric motor, 3m, 3b...Fist φ/bidirectional thyristor switch, 4@, 4b11 @...Phototriac light receiving section, 4c, 4d...Phototriac light emitting section, T...Φ・Washing machine control section, 19...
...Cooling fan, 2011...Fuon motor.

Claims (2)

[Claims] (1) A rotating body for agitation is provided in the washing tub, and the rotating body is powered by an electric motor and rotates by means such as a V-groove pulley or a V-belt, and the direction of rotation is reversed at a predetermined period. The washing machine is characterized in that, before energizing the electric motor, a half-wave rectified portion is energized, and then an alternating current portion for giving rotation to the motor is applied, and this is repeated in accordance with the reversal period. washing machine control device. (2) A rotating body for agitation is provided in the washing tub, and the rotating body is powered by an electric motor and rotates by means such as a V-groove pulley or V-belt, and the direction of rotation is repeatedly reversed at a predetermined period. In the washing machine, before energizing the electric motor, a half-wave rectified portion is applied, and then an alternating current portion for giving rotation to the electric motor is applied, and this is repeated in accordance with a reversal period, and 1. A washing machine control device characterized in that, even when the energization of the motor is stopped, the current is continuously energized by the rectified half-wave after energization of the alternating current component that rotates the motor, and then the energization is stopped.