JPS5818117B2 - automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a two-tank type automatic washing machine that automatically sequentially executes a series of cleaning operations in the washing tank side, including washing, draining, etc., and at least two rinsing steps in appropriate combinations. It's about machines.

Generally, if the water in the washing tub is agitated with strong force during the rinsing process, foaming will occur even if the amount of detergent contained is extremely small, and many water bubbles will also be generated.

Therefore, if the water surface of the washing tub is always visible to the user, such as in a two-tub automatic washing machine, and the water in the tub is agitated with strong force during the final rinsing process, which is the finishing stage, Although the rinsing effect is actually sufficient, the user feels that the rinsing effect is visually insufficient due to foaming and blistering, and has had doubts about the rinsing effect.

If you perform rinsing while supplying water like water rinsing,
Floating objects such as bubbles and lint on the surface can be flushed away as the water overflows, but even in that case, it is more efficient if the water surface is close to a standstill, and from the point of view of saving water, there are other methods. need to be proposed.

The present invention has been made in view of this point, and will be described below with reference to the drawings.

Figure 1 shows an electric circuit built into a two-tank automatic washing machine, which uses the washing tank side to execute a series of washing operations according to the program chart shown in Figure 2. The explanation will be given along the progression of the program chart.

The time switch TSW incorporates cam switches 81 to S7 and selectively opens and closes their contacts in sequence as each process moves, as shown in the chart in Figure 2. ``6 washes''.

When aligned, the main switch cam switch S1
→Water level S] The water supply valve 4 is first supplied with power via the NC contact of switch 1 →B contact of cam switch S2.

When the specified amount of water is supplied to the washing tub, the water level switch 1 turns to NO.
Switches to the contact side, stops the water supply, uses this as an opportunity to supply power to the timer motor 7, and starts rotating the cams of each cam switch 81 to S7, and the a contact of the cam switch S5 → water flow strength changeover switch 2 → cam switch Power is supplied to the motor 6 via S6 or 87 to rotate the pulsator and agitate the washing water mixed with detergent.

This water flow strength changeover switch 2 sets a weak water flow via the cam switch S7 when the a contact is closed, and a strong water flow via the cam switch S6 when the b contact is closed, and each cam switch S6° S7 is its a as shown in Figure 2.
, B contacts are selected alternately.

In other words, the cam switch S6 switches once per minute.
7 performs two switching operations and rotates the pulsator in reverse during the washing process.

Therefore, by using the cam switch S7, which has a relatively short closing time, the rotation of the pulsator is stopped before the flow reaches a constant velocity, so that a weak water flow can be set.

In the next drainage process, the cam switch S3 supplies power to the drain valve, and the washing water is discharged to the outside of the machine via the drain hose, and the timer motor 7 continues to be supplied with power via the cam switch S4 to time the drain process. let it happen.

The next rinsing process is automatically carried out as the timer motor 7 rotates each cam switch 81 to S7, and now the NC
Water level switch 1 that is closed on the contact side → cam switch S
Power is supplied to the water supply valve 4 through the B contact of No. 2 to supply water to the washing tub, and when the prescribed water supply is completed and the water level switch 1 is switched to the NO contact side as described above, power is supplied to the timer motor 7 and the motor 6. do.

The water flow in this rinsing step can be set to be strong or weak by using the water flow strength changeover switch 2, as in the previous washing step.

In addition, a water supply valve changeover switch 3 is provided, and when this switch is closed, power is supplied to the water supply valve 4 through the a contact of the cam switch S2 during the rinsing process, and so-called water injection rinsing can be performed. ing.

Thereafter, two rinsing steps (either reservoir rinsing or water injection rinsing) are set depending on whether the water supply valve changeover switch 3 is opened or closed.

) is provided between the draining process and the series of cleaning operations is completed.

) differs in content from the previous rinsing process.

To explain this, in this rinsing process, as in the previous rinsing process, water is first dynamically supplied after the drain, and when the NO contact of the water level switch 1 is switched, power supply to the timer motor 7 and motor 6 is started. , the rinsing process starts, but for example, if the rinsing process is set to 3 minutes, the cam switch S is pressed for the final 1 minute.
The contact No. 5 switches from the A to the B contact side, and therefore, for the past one minute, the mokro has been powered through either the cam switch S6 for setting the strong water flow or the cam switch S7 for setting the weak water flow. The cam switch S7 for setting the weak water flow is forcibly set to perform rinsing with a weak water flow.

In this way, in the final rinsing process, the water flow is set to a weak water flow for all or part of the period, so it is possible to suppress the foaming of the detergent and the generation of blisters.Especially when rinsing with water, the water surface is almost at a standstill. This allows floating objects such as bubbles and lint on the surface to be successfully flushed out along with overflowing water.

Even if this final rinsing process is a reservoir rinse and the water flow strength selector switch 2 is closed to the b contact side, which is the cam switch S6 side, the detergent will still foam because the weak water flow is forcibly set. The generation of water and blisters is suppressed to a small extent, and the user can visually recognize that a sufficient rinsing effect has been achieved, and the user can obtain a sudden result.

As described above, according to the present invention, by setting all or part of the final rinsing step in a series of washing operations to weak water flow operation, the rinsing of laundry can be performed according to the desired water flow selected by the strong/weak water flow changeover switch. After the water flow is efficiently carried out, the detergent can be finished with less foaming and water bubbles, and therefore a high rinsing effect can be achieved through several rinsing steps, while at the same time the user is visually It can be recognized that a high rinsing effect has been obtained, eliminating the previous doubts, and by using water pouring as the final rinsing step, a higher rinsing effect can be expected.

[Brief explanation of the drawing]

FIG. 1 shows an electric circuit installed in a two-tub type automatic washing machine which is an embodiment of the present invention, and FIG. 2 shows its program chart. 1: Water level switch, 2: Water flow strength/weakness changeover switch, 4:
Water supply valve, 5: Drain valve, 6: Motor, 7: Timer motor,
TSW: Time switch.

Claims (1)

[Scope of Claims] 1. A two-tank automatic washing machine that automatically sequentially executes a series of cleaning operations by suitably combining steps such as washing, draining, etc. and at least two rinsing steps on the washing tub side using a time switch. The machine is equipped with a manual strong/weak water flow changeover switch for switching the operation of the motor that rotates the pulsator between strong water flow operation and weak water flow operation, and the time switch is used to switch the water flow during the entire or part of the final rinsing process. The sled is characterized by having a built-in cam switch which supplies power to the sled to execute weak water flow operation without using a switch, and which supplies power to the motor via the water flow changeover switch during other rinsing periods other than the operating period. automatic washing machine.