JPS5861790A - Control apparatus of electronically controlled washer - 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 The present invention relates to a washing machine motor control device suitable for automatically reversing the washing machine motor in short cycles.

In recent years, instead of a method in which the rotor blades are rotated at high speed over a long period (so-called pulsator method), a method in which the rotor blades are rotated forward and backward in short periods (the so-called agitator method) has been developed.

Generally, in order to rotate the rotor blades forward or reverse, the washing machine motor that drives the rotor blades is rotated forward or reverse. To reverse the washing machine motor, a reversing switch is used which switches the contacts using a cam plate rotated by a timer motor.

When the contacts of the reversing switch are switched in short cycles using a single cam plate, the following public auction occurs.

The drawbacks will be explained (2) using (a), (b), (c), and (c) in FIG. 1, which show the operating states of the reversing switch 1 and the cam plate 2. Three types of cam surfaces are formed on the cam plate 2: a cam surface X for forward rotation, a cam surface Y for stopping, and a cam surface Z for reverse rotation. 1a
As the contact point C slides, the contact point C, which is moved up and down by the contact leg 1a, is brought into contact with the contact point a and the contact point 1) alternately. With this configuration, the inclined surface W is required when the armature leg A moves from the forward rotation cam surface X to the pause cam surface Y, and from the pause cam surface Y to the reverse rotation cam surface Z. However, when the armature leg 1a moves from the reverse rotation cam surface Z to the forward rotation cam surface X, an inclined surface W is required to hold the armature leg 1a.

If the slope W is steep, the sliding resistance between the armature leg 1a and the slope W will be large, and the operability of the cam plate 2 will be extremely poor. On the other hand, if the slope W is gentle, the pause time of the single reversal switch 1 becomes longer, so that the forward and reverse rotation time of the washing machine motor connected to the reversal switch 1 becomes shorter.

The purpose of the present invention is to address the drawbacks mentioned in F and create a single cut,
Even if you use a reversing switch that changes the contacts and rotates the washing machine motor in the forward or reverse direction, it will not work.

To provide a control device for a motor for an auxiliary machine which can set a short pause time for a reversing switch and which does not deteriorate the operability of a cam plate.

The feature of the present invention is that a plurality of reversing switches are provided, and the plurality of reversing switches are connected in parallel to alternately energize the washing machine motor. This is in the control device for the motor for a washing machine.

EMBODIMENT OF THE INVENTION Hereinafter, this invention will be explained in detail based on Example drawing.

FIG. 2 is an electrical control circuit diagram of the washing machine. In FIG. 2, a timer 3 indicated by a dotted line is connected to a timer motor 4,
Cam switches T4, T2 . T8. T4. ']”,
and two reversing switches S1., which are automatically reversed in short cycles by a cam plate rotated by the timer motor 4.
S2.

A washing machine motor 5 is connected in series to the reversing switch S1. The reversing switch S2 is connected in parallel to the one reversing switch S. The manual changeover switch 6 is connected so that only the reversing switch S2 can be released.

The power source 7 is connected to a timer motor 4, a washing machine motor 5, a drain valve 8 for draining washing water in the washing tub, and a water supply valve 9 for supplying washing water into the washing tub. A pressure switch 10 is provided which opens a water supply valve 9 when a specified amount of washing water is supplied into the washing tub.

Cam switch T□* 'r, 1 T8 * T4 i
T5 opens and closes according to the time chart shown in FIG.

Reversing switch S1. S2 opens and closes according to the time chart shown in FIG. The reversing switches S□ and Sl set the reversing period to 0.8 seconds for forward rotation, 0.8 seconds for integral stop and 0.8 seconds for reverse rotation, and alternately energize them.

In the above configuration, when washing and rinsing, the cam switch T8. The contact a of T4 and the cam switch T are closed, and the water supply valve 9 is operated.

When a specified amount of washing water is fed into the washing tub by the water supply valve 9, the normally closed contact NC of the pressure switch 10 opens and the normally open contact NO closes.

When the normally open contact NO closes, the reversing switch S,.

8.2 causes the washing machine motor 5 to rotate in the forward and reverse directions, and the rotary blades connected to the washing machine motor 5 to rotate in the forward and reverse directions. Washing or rinsing is performed by rotating the washing water and the washing material in the washing tub by forward and reverse rotation of the rotary blades.

When selecting strong washing or strong rinsing, close the manual selector switch 6 and press the two reversing switches S1. S2
The washing machine motor 5 is rotated in forward and reverse directions. When selecting gentle washing or gentle rinsing, the manual changeover switch 6 is opened and the washing machine motor 5 is rotated in the forward and reverse directions using only the 1-reverse switch S1. If only the reversing switch S□ is energized, the washing machine motor will have to rest for a long time, so the number of forward and reverse rotations of the rotary blade will decrease, and the washing power or rinsing power will become weaker.

When draining water, the cam switch T opens to release the washer motor 5 from IEF4, and the contact a of the cam switch T3 opens to open the water supply valve 9, and the cam switches 1 and 2 close to operate the drain valve 8. do. Drain valve 8 operates,
When the washing water in the washing tub is drained, the normally closed contact NC of the pressure switch 10 is closed, and the process moves to the next step.

During dehydration, the cam switch Ill, , 1.12
and cam switch J13. The contact 1) of l114 is closed, releasing the cam switch 'J'5, and through the contact 1) of the cam switch A]) - the contact 1 of the reversing switch S2].
A washing machine motor 5 continuously rotates in one direction at high speed. When the washing machine motor 5 continuously rotates in one direction at high speed, the rotation is transmitted to the clutch mechanism and is transmitted to the washing tub.The washing tub rotates, centrifuging the water contained in the washed mahjong. Then, dehydration work is carried out.

During fk feeding or rinsing, the contacts a, 1 of the reversing switch S1 and the contacts a, 1) of the reversing switch S2 are alternately energized as shown in FIG.

Compared to using only the reversing switch S1.

Contact life can be doubled. Furthermore, since it is possible to take a long pause time between switching from the contact 1) of the reversing switch S to the contact a again, and to operate the reversing switch S2 during this pause time, as shown in FIG. The angle of inclination of the inclined surface W can be set sufficiently small. Since contact a of the reversing switch S2 can be closed at any time during the resting time of the reversing switch S1, it is possible to set the resting time of the washing machine motor 5 to a very small value of 1 second or less. be.

Since the inclination angle of the inclined surface (slanted surface W in Fig. 1) of the cam plate that opens and closes the reversing switch SI+ SG can be set small, the contact leg (f, contact leg la in Fig. 1) of the reversing switch SI+ SQ can be set to a small value. Smoothly slides on the cam surface of the cam plate. Therefore, the operability of the cam plate is extremely excellent.

In this embodiment, two reversing switches are used, but the present invention is not limited to this. If three or more reversing switches are provided, the life of each reversing switch can be further extended, and it is possible to select even weaker washing or rinsing.

As described above, according to the present invention, the rest time of the reversing switch can be set short, and the operability of the cam plate for opening and closing the reversing switch does not deteriorate.
A washing machine motor control device suitable for short-cycle operation can be provided.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the operating states of the reversing switch and cam plate, Fig. 2 is an electrical control circuit diagram of a washing machine showing an embodiment of the present invention, and Figs. 3 and 4 are time charts of the timer. be. 5-Washing machine motor, 6...manual selector switch, etc.
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Claims (1)

[Claims] 1. A plurality of reversing switches are provided whose contacts are switched by a single cam plate to rotate the washing machine motor in the forward and reverse directions, and the plurality of reversing switches are connected in parallel and energized alternately. A control device for a washing machine motor, characterized in that: 2. The washing machine motor control device according to claim 1, wherein two reversing switches are provided, and the two reversing switches are connected in parallel and energized alternately. . 3. To either one of the two reversing switches. 3. The washing machine motor control device according to claim 2, further comprising a manual changeover switch connected in series. 4. The washing machine motor control device according to claim 2, wherein the two reversing switches are set to the same reversing cycle. 5. Set the reversal cycle to forward rotation for 0.8 seconds, stop for 08 seconds - reverse rotation (1
) Claim 4 is characterized in that the time is set to 0.08 seconds.
A control device for a washing machine motor as described in 1.