JPS596795Y2 - Washing machine with automatic water supply and drainage device - Google Patents

Description

[Detailed description of the invention] This invention relates to a washing machine, and in particular to a washing machine that starts a washing or rinsing operation following the water supply operation, and automatically performs a draining operation after the washing or rinsing operation.

Conventionally, washing machines using a spring-driven time switch stop after just one washing or rinsing operation, so the washing machine must wait while the water is being supplied and drained.

For this reason, some machines use a Warren motor-driven time switch to automatically perform water supply, washing, draining, rinsing, and draining operations.

This has a structure in which the power switch is opened and closed by pushing and pulling the operating shaft of the time switch, and the device is complicated, large, and expensive.

With a spring-driven time switch, it is conceivable to provide a time section for draining water after washing operation like a Warren motor-driven time switch, but with a spring-driven time switch, the time switch can be operated by rotating the shaft in one direction. Since a time limit is set and the shaft rotates back to expire the set time limit, when setting the time limit, the drain device always passes through the drain time section and operates the drain device.

Therefore, an unpleasant sound is generated during the time setting operation, giving the user a sense of anxiety, and if water has already been pumped into the washing tank, there is also the inconvenience of discharging the water.

This invention aims to solve the above problem and make it possible to automatically control water supply and drainage operations even with a time switch that sets a time limit by rotating a shaft, such as a spring-driven time switch.

This invention will be explained in detail below with reference to a drawing that shows a washing machine with a two-tank dehydrator.

In Fig. 1, 10 is the main body of the washing machine, and the washing tank 11
and the dehydration receiving tank 12 are placed side by side inside.

13 is a pulsator provided at the bottom of the washing tank 11;
It is driven by a motor 14 via a belt and pulley.

15 is a dehydration basket provided in the dehydration receiving tank 12;
6.

Reference numeral 17 denotes a drain hose, which communicates with the floating paddy at the bottom of the washing tank 11 via an electromagnetic drain valve 27, and is always in communication with the overflow port of the tank and the dewatering tank 12.

Reference numeral 18 denotes a control panel installed on the top of the main body, which includes time switches for controlling the washing and dehydrating operation times, a water flow switching device, etc.

FIG. 2 is an electrical circuit diagram, and 22 in the figure is a power plug.

A time switch 21 is a time limit device, and has a main time switch 21a for opening and closing the power supply circuit.

This time switch sets a time limit by rotating the shaft 23 (Figures 3 and 4) in one direction, and expires the set time limit by rotating the shaft back in the other direction using a mainspring as a driving source. Those that do are used.

24 in FIG. 1 is a timer knob.

In this washing machine, water may be supplied to the washing tank using a bucket or the like, but water may also be supplied automatically by setting the time switch 21.

Reference numeral 19 denotes an electromagnetic water supply valve that controls water supply to the washing tank, and is connected to a water source (for example, a water faucet) through a hose 20 (FIG. 1).

25 is a water level switch that responds to the water level in the washing tank 11, and an electromagnetic water supply valve 19 is connected to the contact NC that is closed when the water level is low.
A motor 14 is connected to each contact NO which is closed when the water level is high.

A water flow changeover switch 30 is inserted between the contact NO of the water level switch and the motor 14, and one contact is connected to the automatic reversing switch 21C, and the other contact is connected to the one-way rotation path of the motor.

In FIG. 1, 30a is an operation button for the water flow selector switch 3b.

In the case of this automatic water supply, the mainspring-driven time switch is either structured to close the main time switch at the beginning of the setting operation and stop the clock mechanism with an electromagnetic locking device until water supply is completed, or only for the scheduled time of water supply. A structure is used in which an additional time limit is set, and water is supplied at the beginning of all set time limits, and water is washed during the remainder of the set time limit.

The electromagnetic drain valve 27 is connected to one contact e of a two-contact changeover cam switch 21b connected in series with the main time switch 21a.

The other contact d of the cam switch 21b is the water level switch 2
5 to a motor 14 and an electromagnetic water supply valve 19.

Figure 3 shows the time switch knob 24 and the display provided around it, Figures 4 a-e show the main parts of the time switch viewed from the back, and 2B shows the main time switch 21.
This is a main timer cam that opens and closes the main timer switch 21a via a lever 29, and has four locations 28a that open the main timer switch 21a, and closes the switch when the lever 29 rides on the outer periphery of the cam.

Reference numeral 30 designates a sub-cam that opens and closes the cam switch 21b via a lever 31, and has a recess 30a that closes the electromagnetic drain valve 27 side contact e for the drain operation time (for example, 3 minutes). When the water level switch 25 reaches the outer periphery of the water level switch 25, the water level switch 25 side contact d is closed.

Both cams28. 30 is in a floating state on the shaft 23 with respect to the rotational direction, and one main timer cam 28 is fixed to the shaft 23 in a notch 32a of a disc 32 and a pin 33 protruding from the cam 2B is inserted into a recess 30a of the cam. The other secondary cam 30 engages with the disc 3 for a corresponding drainage operation time with play.
A pin 34 protruding from the cam 30 is engaged with the notch 32b of No. 2 with play for quick turning of the switch.

Since the time switch has the same structure as described above, its display is the operating time of the motor 14, that is, the washing or rinsing time display 35, and the recess 30 of the cam, as shown in FIG.
a and a drainage operation display 36 of a corresponding size in that order in the return rotation direction.

When the time switch is rotated in the direction of arrow A in FIG. 4a in order to set the time limit from the stopped state (FIG. 4a), the pin 34 is first pushed by the notch 32b and the sub cam 3 is rotated.
0 rotates.

As shown in FIG. 4b, the lever 31
When the pin 33 reaches the end of the pin 33 due to the notch 32a,
is pressed, the main timer cam 28 also begins to rotate, and both levers 2
9. 31 rides on the outer circumference of the cam at the same time.

As a result, the contact e of the cam switch 21b is opened, and then the main time switch 21a is closed, and at the same time the contact d of the cam switch 21b is closed.

When an arbitrary time limit is set and the knob 24 is released, the shaft 23 and disk 32 of the time switch return to the direction of arrow B and begin to rotate as shown in FIG. 4C.

By closing the contacts d of the main time switch 21a and the cam switch 21b, power is supplied to the electromagnetic water supply valve 19 via the contact NC of the water level switch 25, and water supply is started.

When the predetermined water level is reached, contact No. is switched to stop the water supply and at the same time, the motor 14 is driven.

The time switch is located at the notch 32 at the beginning of the return rotation.
Since a is larger than the notch 32b, the sub cam 30 begins to rotate in the direction of arrow B first.

When the relative positions of the recesses 28a, 30a of both cams return to their original state, the main timer cam 28 also begins to rotate.

After the set time has expired, the knob 24 will display the motor operation time 3.
When the lever 31 returns to the end of point 5 (FIG. 4 d shows the state slightly before that point), the lever 31 falls into the recess of the sub-cam 30, the cam switch 21b is switched from the contact point d to the contact point e, and the motor 14 is switched on. At the same time as it is stopped, power is supplied to the electromagnetic drain valve 27,
Drainage operation is started.

This drainage operation is performed by the main time switch 2 as shown in Fig. 4e.
1 continues while a is closed.

When the lever 29 falls into the recess 28a of the main timer cam 2B after the drain operation time has elapsed, the main timer switch 21a is opened and the power supply to the electromagnetic drain valve 27 is cut off.

If you want to use the detergent solution again, press the cam switch 21.
A switch 40 connected in series between the contact e of point b and the electromagnetic drain valve 27 is opened in advance to prevent power from being supplied to the electromagnetic drain valve 27 after the washing operation.

In addition, when using a motor instead of a mainspring as a drive source for the time switch, as shown by the two-dot chain line in Fig. 2, the time switch motor TM is connected to the cam switch 21
and contact NO of the water level switch 25.

In this case, a switch 41 interlocked with the switch 40 is inserted between the contact e of the cam switch 21b and the motor TM.

Drainage operation display 3 by keeping switch 41 open
The time switch can be stopped before 6.

In addition, in FIG. 1, 40a is a switch 40. 41
This is a knob for manual operation.

As described above, this invention includes a main time switch in the timer, and when the shaft of the timer rotates in the time setting direction, one contact is opened before the main timer switch is closed, and the other contact is then closed. and a cam switch that opens the other contact and closes one contact at a predetermined time period before opening the main time switch when the coaxial returns, and the main time switch and the cam switch are connected in series. At the same time, an electromagnetic drain valve is connected to one contact of the cam switch, and an electromagnetic water supply valve is connected to the other contact through the low water level contact of the water level switch that responds to the water level in the washing tank, and the electromagnetic water supply valve is connected to the other contact through the high water level contact. Since the pulsator drive motor is connected to each unit, water supply operation is automatically performed by setting a time limit, followed by washing or rinsing operation, and draining operation is performed automatically after the set time limit. can do.

Moreover, since the electromagnetic drain valve does not operate when setting the timer, there is no unpleasant sound that makes the user feel uneasy. There is no inconvenience of draining water.

[Brief explanation of drawings]

Figure 1 is a front view of a washing machine with a two-tank dehydrator that embodies this idea, Figure 2 is an electric circuit diagram, Figure 3 is a front view showing the display part of the timer, and Figures 4 a to e are FIG. 2 is a rear view of the main part of the timer and an explanatory diagram of its operation. Explanation of numbers, 21: Timing device, 21b: Switch, 27
: Solenoid drain valve, 35: Motor operation time display, 36: Drain operation display.

Claims (1)

[Scope of utility model registration request] An electromagnetic water supply valve is installed in the water supply channel of the washing tank, and an electromagnetic drain valve is installed in the drain channel of the same tank, and the time is set by rotating the shaft in one direction, and the time is set by rotating the shaft in the other direction. A timer for expiring a timer has a main timer switch, and when the shaft of the timer is rotated in the timer setting direction, one contact is opened before the main timer switch is closed, and the other contact is then closed. A cam switch is provided that opens the other contact and closes one contact at a predetermined time period before the main time switch is opened during return rotation of the coaxial, and the main time switch and the cam switch are connected in series. Connect an electromagnetic drain valve to one contact of the cam switch, and drive the electromagnetic water supply valve via the low water level contact of the water level switch that responds to the water level in the washing tank to the other contact, and drive the pulsator via the high water level contact. A washing machine with an automatic water supply and drainage device that is connected to each motor.