JPH0361463B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coin timer type automatic washing machine.

FIG. 1 shows an electrical circuit diagram of a conventional washing machine of this type, and FIG. 2 shows an operating program for the time switch shown in FIG.

In the figure, 1 is a time switch, 2 is a coin unit for inserting coins, 3 is a water supply valve, 4 is a pressure switch, 5 is a safety switch, and 6 is a valve magnet for a drain valve. In this embodiment, the coin is for 150 yen, and when 100 yen is inserted into the coin unit 2, the contact _S1 is closed, the relay coil _Mg1 is energized, the contact _R1 is closed, and it is self-held.

Next, when you insert 50 yen, contact S ₂ closes and relay coil Mg ₂ is energized, contact R ₂ closes and self-holds.

In the timer program shown in Fig. 2, when the timer is in the off state, through the contacts T2 _and b of the time switch 1, and through the contacts _R1 and _R2 of the coin unit 2,
The relay magnet 1a built into the time switch 1 is energized, the contact _R3 is switched to the NO side, and the timer motor TM is energized. At this time, the timer motor TM switches the gear series that drives the cam by the relay magnet 1a to perform fast forwarding.
After cutting, it is sent to the cleaning process.

Thereafter, according to the program shown in Figure 2, cleaning, draining, dehydration, and rinsing are completed, and the machine is turned off. 7
is a motor that rotates a pulsator during washing and rinsing, and rotates a washing layer that also serves as a dehydration tank during spin-drying.

During the process of the above program, if there is an abnormality in the drainage route and insufficient drainage occurs, that is, if the drainage hose is clogged or the drainage hose is simply not set to allow drainage, This drainage process is as follows. First, we will discuss the normal drainage process in detail. contact
The CO (common terminal) of pressure switch 4 is energized from T _2a . When entering the draining step from the washing step (same as when entering the draining step from the rinsing step), there is water in the washing tub, so the pressure switch 4
is on the NO (normally open contact) side, and energizes the timer motor TM through contact T _4a and contact R ₃ . At this time, the valve magnet 6 that controls the drain valve is energized through the contact _T1 to drain water. pressure switch 4
When the water is drained to the reset water level, the pressure switch ₄ switches to the NC (normally closed contact) side, and the timer motor TM and valve Magnet 6 is energized and drainage continues for 2 minutes 50 minutes.
After a few seconds, the dehydration process begins.

The above process is performed when normal drainage is being performed, but if there is an abnormality, if the pressure switch 4 does not switch to the NC side during the 1 minute and 50 seconds when contact T _4a switches to contact T _4b , Since the contact T _4a is open after the pressure switch 4 is switched to the NO side, neither the timer motor TM nor the valve magnet 6 is energized, and the process cannot proceed to the next step.

In the above state, time switch 1 cannot be advanced by external operation, and
Even if the drain path is unclogged or the drain hose is set so that it can drain, the valve magnet 6 that opens the drain valve cannot be opened, so the water cannot be drained, and the pressure switch 4 cannot be opened.
Until the machine is reset, the only option is to pump out the water with a bucket and throw it away, which will cause the machine to lose its function as an automatic washing machine and cause a major problem in terms of product value.

According to the present invention, when there is an abnormality in the drainage route, by removing the abnormality in the drainage route, it is possible to perform programmed operation up to the final process without using a bucket.An example of the present invention will be described below. .

In Fig. 3, 8 is an externally operable push button switch whose common terminal is connected to the valve magnet 6, whose normally closed contact NC is connected to the drain contact _T1 which is closed during the drain process during normal program operation.
The normally open contact NO is connected to the main contact _T2 a.

The configuration other than the above is the same as that shown in FIG. 1, and its operation is also the same.

In the above configuration, the operation when there is no abnormality in the drainage path is the same as that described in FIG. 1, but when there is an abnormality in the drainage path, contact T _4a opens 1 minute and 50 seconds after entering the drainage process. If the pressure switch 4 is not switched to the NC side by this time, the progress of the program will be stopped as in the conventional case. Here, the abnormality in the drainage path is removed and, for example, an externally operable push button switch 8 provided at the rear of the product is pressed. As a result, the push button switch 8 is closed to the NO side and connected to the contact point _T2 a, so that the valve magnet 6 is energized and water can be drained. Pressure switch 4
After switching to the NC side, when the push button switch 8 is released, the push button switch 8 switches to the NC side and forms a normal circuit, enters the normal drainage process, and from then on, program operation is automatically performed. Ru.

FIG. 4 shows another embodiment, in which the common terminal and normally closed contact of an externally operable pushbutton switch 8 is shown.
NC has the same connection as in Figure 3, but normally open contact.
NO is connected to the normally open contact NO of the pressure switch 4. This also produces effects similar to those of this embodiment.

In this embodiment, a push-button type switch has been described as an externally operable switch, but it goes without saying that the switch is not limited to the push-button type.

In addition, in Fig. 3, by connecting the normally closed contact NC of the push button switch 8 to the main contact _T2 a of the time switch 1, the contact
In the off state where T _2a is open, even if a child presses the push button switch 8 for mischief, the valve magnet 6 for the drain valve will not be energized.

In addition, as shown in Fig. 4, the normally open contact NO of the pressure switch 4 is connected to the normally open contact NO of the push button switch 8.
Even in a configuration where NO is connected, water will not be drained in the OFF state.

Also, by connecting the common contact of the push button switch 8 to the valve magnet 6 of the drain valve, and turning on the switch 8, the valve magnet 6 is energized, so that the timer motor TM is not energized. Since the water can be drained, the dewatering process will not start when the timer motor TM is energized and water still remains in the washing tub, that is, when the pressure switch 4 is at the normally open contact NO.

Fig. 5 shows another embodiment, which is the same as Fig. 3 in that the normally open contact NO of the push button switch 8 is connected to the a of the main contact _T2 , but the common terminal of the push button switch 8 is The difference from FIG. 3 is that the valve magnet 6 is indirectly connected to the valve magnet 6. Also in FIG. 5, the same effect as in the case of FIG. 3 is produced.

As described above, according to the present invention, by connecting a switch for external operation to the circuit that energizes the valve magnet for the drain valve, drainage abnormalities such as failure to drain water to a predetermined water level in the drainage process can be prevented. In some cases, the abnormality can be easily corrected by operating the switch, and a coin timer type automatic washing machine with excellent serviceability can be provided.
In addition, while the external operation switch is operated to drain water, the time switch in the control unit is configured to cut off power to the timer motor, so the time switch in the control unit operates loads other than the drainage means, such as motors, etc. This can be prevented and safety can be improved.

[Brief explanation of drawings]

Fig. 1 is an electrical circuit diagram of a conventional coin timer type automatic washing machine, Fig. 2 is a diagram showing the timer program of the time switch, and Fig. 3 is an electrical circuit diagram of a coin timer type automatic washing machine according to an embodiment of the present invention. FIGS. 4 and 5 are electrical circuit diagrams showing other embodiments. 1...Time switch, 6...Valve magnet, 8...Push button switch for external operation.

Claims (1)

[Scope of Claims] 1. A time switch that controls a series of processes such as washing, draining, rinsing, etc., and a draining means controlled by the time switch during the draining process, The time switch is configured to prevent the transition to the next step when the water is not drained to a predetermined level, and the drain means is connected to a switch that can be opened and closed by external operation, and the external operation switch is , a coin timer type automatic washing machine which, by its operation, electrically cuts off the energizing circuit to the timer motor of the time switch and the drainage means, and also enables the energization to the drainage means. 2. The coin timer type automatic washing machine according to claim 2, wherein a common terminal of a switch for external operation is connected to the drainage means, and a normally closed contact is connected to the timer motor side.