JPS5820234Y2 - Fully automatic washing machine - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a fully automatic washing machine.

In a fully automatic washing machine, after washing and before rinsing, the inner tank can be rotated at high speed to shake off the detergent from the items to be washed, improving the efficiency of rinsing and saving rinsing water and time. .

However, when the detergent solution is discharged from the inner tank at high speed, it collides with the outer tank and foams, and the foam is agitated by the rotation of the inner tank, making it even more foamy, and not only overflows from the top of the outer tank. The problem arises of overloading the motor.

For this reason, it has conventionally been proposed to start the inner tank at short, equal time intervals, but even in this case, the rotational speed of the inner tank increases sequentially, and if the distance between the inner tank and the outer tank is narrow or the drainage capacity is If it is small, foaming may increase.

This idea controls the rotation of the inner tank to suppress foaming as much as possible, shakes off the detergent solution from the items to be washed without overloading the motor, and then continuously supplies water into the rotating inner tank to detergent. By shaking off the liquid together with water, you can reduce the amount of detergent contained in the items being washed as much as possible.
The purpose is to efficiently carry out the next rinsing operation.

A detailed description will be given below with reference to the drawings.

In Fig. 1, 10 is the outer casing of the washing machine, 11 is an outer tank suspended and supported within the outer casing, and 12 is an inner tank provided within the outer tank, with numerous dewatering holes (not shown) in the peripheral wall. ),
It doubles as a washing tank and a dehydration tank.

A pulsator 13 is a stirring blade provided at the bottom of the inner tank 12.

The inner tank 12 and the pulsator 13 are selectively driven by a motor 14 through pulley and clutch mechanisms, respectively.

15 is an overflow port provided at the top of the outer tank, and 16 is a drain port provided at the bottom of the outer tank, which are led out to the outside via a drain hose 24.

17 is a drain solenoid valve that opens and closes the drain port 16.

A water supply port 18 is provided above the inner tank 12 facing into the tank, and is connected to a water source via a water supply electromagnetic valve 19.

FIG. 2 is an electrical circuit diagram, in which 20 is a power supply, and the part surrounded by a chain line 21 is a time switch.

The PPS is a manual power switch that is opened and closed by pushing and pulling the time switch knob.

S1 to S8 are cam switches opened and closed by a process control cam driven by a timer motor TM.

The process control cam is intermittently advanced by one scale in the horizontal direction in FIG. 3 per minute by a ratchet mechanism.

In FIG. 3, the blacked-out portions in the horizontal direction indicate the closing points of the contacts.

R8 and C8 are switches for time control of one minute or less, and are opened and closed by respective cams provided on a shaft that rotates at a speed of one rotation per minute by a timer motor TM.

In FIG. 4, the distance from the left end to the right end is 1 minute, and the blacked-out area indicates the closed point of the contact.

R5 is an automatic reversing switch that alternately reverses the motor 14, and C3 is an intermittent switch that supplies power to the motor 14 intermittently.

The cam switch S1 is connected in series with the power supply 20 together with the manual power switch PPS to time the entire operation.

Cam switch S3 is connected to cam switch S1 at one fixed contact a, and has a pilot lamp PL at a movable contact.
is connected.

The other fixed contact of the cam switch S3 is connected to a buzzer BZ which is an end notification device.

PS is a water level switch that responds to the water level in the outer tank 11, and its movable contact is connected to the movable contact of the cam switch S3.

A cam switch S4 is connected to a normally closed contact NC of the water level switch PS that is closed when the water level is low, and a cam switch S8 is connected to a normally closed contact NO that is closed when the water level is high.

The water supply solenoid valve 19 is connected to the normally closed contact NC of the water level switch PS via one fixed contact of the cam switch S2.

The timer motor TM is connected in series to both cam switches S4 and S8.

The movable contact of the cam switch S6 is connected in series with the movable contact of the cam switch S3, and one fixed contact is connected to the drain electromagnetic valve 17.

The electromagnet of this drain valve also switches the clutch between the pulsator and the inner tank at the same time as the valve is opened.

The other fixed contact of the cam switch S6 is connected to the water supply solenoid valve 19 via the manual changeover switch 22.

The movable contacts of cam switch S5 are cam switches S4 and S8.
One fixed contact a is connected to the motor 14 via an automatic reversing switch R8.

The other fixed contact S connects the motor 1 through a cam switch S7 that selects between the intermittent switch C3 and a circuit that does not go through it.
4 is connected to the one-way rotation circuit of C5, and is also connected to the intermittent switch C5.
and is connected to the water supply solenoid valve 19 via the other fixed contact a of the cam switch S2.

A lid switch 23 is connected in parallel with the cam switch S3, and is linked to a lid that opens and closes the top opening of the main body 10.

The operation of this washing machine will be explained.

When you put the items to be washed and detergent into the inner tank, close the manual power switch PPS, and move the knob to the closing position of the cam switch S1, one fixed contact a of the cam switch S3
, normally closed contact NC of water level switch PS, cam switch S2
Power is supplied to the water supply solenoid valve 19 through one of the fixed contacts.

When a predetermined amount of water is supplied, the water level switch PS is switched to the normally closed contact NO, and since the cam switch S8 is closed, power is supplied to the timer motor TM.

At this time, since the cam switch S5 is closed to the contact a, the motor 14 is alternately reversed according to the automatic reversing switch R8, and the washing operation in the detergent liquid is started.

At the end of the washing operation, cam switch S5 closes both contacts a and l)
The motor 14 is cut off at a neutral position where it does not come into contact with any of the motors.

At the same time, cam switch S6 is closed at contact a, and drain solenoid valve 17 is opened.

Cam switch S4 and cam switch S during drain operation for 2 minutes
8 are overlapped and closed.

Therefore, when drainage is performed normally, the water level switch PS returns from the normally open contact NO to the normally closed contact NC, but
Power is continuously supplied to the timer motor TM through the cam switch S4.

From the start, the 2-minute diameter cam switch S8 is opened, and the timer motor TM is driven only through the cam switch S4.

When drainage is completed, the cam switch S3 is opened from the contact a to the neutral position, and power is supplied to the timer motor TM through the lid switch 23 from the normally closed contact NC of the pressure switch PS through the cam switch S4.

Since the cam switch S5 and the cam switch S7 have their respective contacts closed, the motor 14 is activated intermittently via the intermittent switch C3.

In addition, since clutch switching between the stirring blade and the inner tank has already been performed in conjunction with the opening of the drain valve, the inner tank 12 is driven intermittently.

The intermittent switch C3 is closed and closed for 12 seconds as shown in FIG.
Open for 2 seconds, closed for 3 seconds, open for 15 seconds, closed for 5 seconds, and released for 20 seconds.

As a result, as shown in FIG. 5, the inner tank 12 reaches approximately 50 Orpm by applying force for 12 seconds, but is decelerated by inertial rotation for 5 seconds, and reaches approximately 50 Orpm by applying force for 3 seconds.
It rises above m, but due to inertial rotation for 15 seconds it is decelerated even more than the previous inertial rotation for 5 seconds, and it rises again after 5 seconds of energization, but it is decelerated even more by inertial rotation for 20 seconds. .

Therefore, although the detergent liquid foams between the inner tank and the outer tank due to the initial rotation of the inner tank, foaming is suppressed by deceleration due to inertial rotation.

However, the next rotation of the inner tank further increases foaming, but since the inertial rotation time becomes longer and the speed is further reduced, further foaming is suppressed and the amount of foam is reduced.

Furthermore, even if the rotational speed of the inner layer increases due to the closing of the next intermittent switch, there is less resistance from the bubbles, and the next inertial rotation time is even longer, so the increase in rotational speed causes This makes it possible to effectively reduce the amount of bubbles generated.

During this dehydration operation, the same opening and closing cycle of the intermittent switch C3 is repeated twice.

The second 12 second energization brings the inner tank closer to its maximum rotational speed.

Since a large amount of detergent liquid has been released by the previous intermittent rotation, the current high-speed rotation will not cause problems with foaming.

After that, the cam switch S7 switches to contact a, and the motor 14
is continuously rotated forward.

Further, the cam switch S2 switches to contact a, and power is supplied to the water supply solenoid valve 19 via the intermittent switch C3.

In other words, fresh water is intermittently supplied to the items to be washed in the inner tank 12 that rotates at high speed, and the detergent solution is shaken off while being diluted with the fresh water.

When the dewatering and rinsing operation is completed, fresh water is supplied in exactly the same way as the initial washing operation, and the stirring blades are rotated to perform the rinsing operation.

Note that during this operation, the cam switch S6 is closed to the contact point, so by closing the manual changeover switch 22 in advance, it is possible to continuously supply fresh water (overflow rinsing) during the rinsing operation. Also, by leaving it open, you can rinse with only the collected clean water.

When the rinsing operation is completed, drainage is performed.

After that, when the cam switch S5 contacts, the cam switch S
7 are respectively closed to contacts a, and the final dehydration operation is started.

Only at the beginning, the cam switch S2 closes the contact a, and fresh water is intermittently supplied to perform final rinsing.

The water supply is then stopped and final dehydration is performed.

One minute before the end, cam switch S3 is switched to contact
Buzzer BZ is activated.

As described above, this invention is capable of continuously rotating the inner tank at high speed during the final dewatering operation by installing a cam switch that switches between inserting an intermittent switch and not inserting an intermittent switch in the power supply circuit of the inner tank drive motor. In addition, after the washing operation and before the rinsing operation, the inner tank can be rotated intermittently to shake off the detergent solution while suppressing foaming.

Moreover, the intermittent switch is opened and closed in such a way that the opening time becomes longer in sequence, and the minimum rotational speed of the inertial rotation of the inner tank while the switch is open does not increase more than the previous minimum rotational speed of the inertial rotation. Therefore, the foaming does not increase as the rotation of the inner tank gradually increases as in the conventional case, and the detergent liquid can be shaken off from the items to be washed by reducing the rotational resistance of the inner tank.

Furthermore, since water is subsequently supplied into the rotating inner tank and the detergent solution is shaken off together with water, the amount of detergent solution contained in the items to be washed is further reduced, allowing the next rinsing operation to be carried out efficiently. Even if the distance between the inner tank and the outer tank is narrow, or the drainage capacity is small, there is no risk of bubbles overflowing from the upper end of the outer tank, so it can be used with confidence.

Since the inner tank does not stop when rotating intermittently, it quickly reaches a sufficient dewatering speed at the next startup and enters the next dewatering rinse operation in which water is supplied while rotating. This has the effect of reducing the time required for the entire process, together with the aforementioned improvement in rinsing efficiency.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the fully automatic washing machine of this invention, Figure 2
The figure is an electric circuit diagram, Figures 3 and 4 are diagrams explaining the opening and closing of the switch,
FIG. 5 is a graph showing changes in the rotational speed of the inner tank. Explanation of numbers 11: Outer tank, 12: Inner tank, 13: Stirring blade,
14: Motor, 21: Time switch, S1 to S8: Power switch, C3: Intermittent switch.

Claims (1)

[Scope of utility model registration request] 1. In a fully automatic washing machine that has an inner tank that functions as both a washing tank and a dewatering function rotatably installed inside an outer tank, and a stirring blade inside the inner tank, the motor circuit for driving the inner tank is opened when draining water after washing operation. A cam switch is provided to form the drain valve circuit.
Continuing with the drainage, the motor circuit for driving the inner tank is formed while the drain valve circuit is formed, and a switch that opens and closes intermittently is inserted in the motor circuit for driving the inner tank, and a switch that opens and closes intermittently is inserted into the motor circuit for driving the inner tank. Another cam switch forming a water supply valve circuit is provided to supply water into the tank, and the intermittently opened/closed switch is opened/closed so that the opening time becomes longer after the inner tank is started. To provide a fully automatic washing machine in which the minimum rotational speed of inertial rotation of an inner tank during opening does not increase more than the previous minimum rotational speed of inertial rotation and does not stop. 2. For switches that open and close intermittently, repeat the same opening and closing cycle at least twice during the dehydration operation after the washing operation and before the rinsing operation.
A fully automatic washing machine as set forth in claim 1 of the utility model registration claim.