JPS5934393B2 - dehydration washing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention has a built-in tapered washing and dehydrating tank, and the washing water is drained by rotating the nuclide and draining the washing water from the upper part of the tank to the water tank side. If the amount of washing water that is pumped up and drained into the water tank is greater than the drainage capacity of the drain hose, this water will accumulate in the water tank during draining, and this will brake the rotation of the washing and spinner tank, causing the water to drain. This focuses on the point where efficiency deteriorates.

To solve this problem, we installed a water reservoir at the bottom of the water tank, and installed a groove here to cover the amount that cannot be drained by the drainage capacity of the drain hose, so that the water level on the water tank side does not become a resistance to the rotation of the washing and dewatering tank. One idea is to do so.

However, according to this, the aquarium is made large, and if forced, the outer tank (the aquarium and the outer tank may also be used).

) itself would have to be made larger, which is not the best idea.

In addition, when the washing and dehydrating tank is continuously rotated when draining water, the washing water that remains at the bottom of the tank is agitated by the washing and dehydrating tank, which foams the detergent mixed into the washing water, and in the extreme, it becomes creamy. This may cause bubbles to form and cause the washing and dehydrating tub to lock up.

Therefore, the present invention has been devised to improve drainage efficiency without intentionally adding any special measures to the water tank.The washing/dehydration tank is rotated during draining, but it is not continuously driven to rotate. This dehydrating washing machine is driven intermittently so that the rotational speed of a washing/dehydrating tank repeats increases and decreases, and the water flows intermittently to the water tank side.

FIG. 1 is a cross-sectional view of essential parts of a one-type fully automatic washing machine that is an embodiment of the present invention. A water tank 1 is suspended in an outer tank by a vibration-proofing mechanism, and a pulsator 2 is placed at the center of the bottom. A conical washing/drying tank 3 is rotatably installed inside the tank, and when draining water, this washing/drying tank 3 has no holes (it is optional to provide a hole in the upper part).

) 3 is rotated to cause the washing water 4 to flow out from the top to the water tank 1 side, and to be discharged from the bottom of the water tank 1 to the outside of the machine via the drain hose 5.

In addition, during dewatering, this washing/dehydrating tank 3 is continuously rotated at high speed to drain water from the laundry 6.

By the way, a type of fully automatic washing machine that is generally available on the market and is equipped with a no-hole washing and dehydrating tub has a washing capacity of 25 kg, a bath ratio of 10, and a washing water volume of 254 kg, and when washing or rinsing, the washing water volume is 254 kg. The pulsator installed at the bottom of the dewatering tank was rotated at a rotation speed of 45 Or, p, m for 2 minutes.
The direction of rotation is alternately changed with a 3-second pause in between, such as clockwise rotation for 7 seconds, stop for 3 seconds, counterclockwise rotation for 27 seconds, and stop for 3 seconds, to perform so-called reverse spiral agitation cleaning.

In addition, when draining water, a drain port is provided at the bottom of the washing and dehydrating tank that communicates with the water tank side, and when dewatering, the washing and dehydrating tank is rotated at high speed and driven to drain water from the top of the tank to the water tank using a pumping method. I'm picking it up.

The fully automatic washing machine shown in FIG. 1 according to the present invention performs washing, rinsing, and dewatering in the same way as conventional ones, and the drainage is not provided with a drain at the bottom of the washing/dehydrating tank 3, but flows from the top to the water tank 1 side by rotation. This pumping and draining system eliminates the conventional drain valve and provides a reliable washing machine that also solves the problem of noise.

FIG. 2 shows an electric circuit built into the fully automatic washing machine shown in FIG. 1, and its cam switches S.

-S4, the contacts are sequentially selected and switched in accordance with the chart in FIG. 3 from the washing step to the final dehydration step, with the hatched portions being shown as closed.

R and S are reversing cam switches for alternately rotating the pulsator 2 in forward and reverse directions during washing or rinsing, and as shown in Figure 4, the contacts a and b are selectively switched with a neutral point of 3 seconds in between. So, each cam switch S above.

~S4 is assembled in the time switch γ and is similarly rotated by timer motors T and M.

Further, in this electric circuit, reference numeral 8 denotes a water level switch, which supplies power to the water supply valve 9 through its NC contact and the a contact of the cam switch S3 as a pre-operation to the washing process, and supplies a predetermined amount of water to the washing and dewatering tank 3. , when a predetermined amount of water is supplied, the NC contact switches to the NC contact, and the timer motor T,
Power is supplied to the washing and dewatering motor 10 through the a contact of the M cam switch S2, and the pulsator 2 is rotated at a rotation speed of 45 Or, p, m to start the washing operation.

During the washing process, the pulsator 2 is rotated clockwise for 27 seconds, paused for 3 seconds, rotated counterclockwise for 27 seconds, paused for 3 seconds, and rotated in reverse with a 3-second pause in between, using reversing cam switches R and S that alternately switch the a and b contacts. This enables efficient washing using the so-called reversed water flow.

When entering the drainage process following the washing process, cam switch S1
Power is supplied to the timer motors T and M and the washing/drying motor 10 through the b contact of the water level switch 8 regardless of the water level switch 8.

Here, the washing/drying motor 10 is continuously supplied with power through the a contact of the cam switch S2, but the cam switch S4 is inserted into the a contact of the reversing cam switches R and S.
is opened during this drainage process, so the motor 10 is supplied with power only from the b contacts of the reversing cam switches R and S.

This means that during the draining process, the motor 10 rotates only in one direction, and intermittently rotates in which power is supplied for 27 seconds and power is not supplied for 33 seconds.

By intermittent driving of the washing and dewatering motor 10 in this manner, the rotation of the washing and dehydrating tank 3 is controlled as shown in the chart of FIG. During the 27 seconds on the B contact side, the rotational speed gradually increases (indicated by
By cutting off the power supply to 1, only inertial rotation occurs,
The number of revolutions will be gradually reduced (indicated by y), and this increase and decrease will be repeated three times during the 3-minute drainage process.

This intermittent rotational drive causes the washing and dewatering tank 3 to collect washing water 4.
is intermittently caused to flow out from the upper part to the aquarium 1 side.

The washing water 4 that has flowed out to the water tank 1 side is drained out of the machine in sequence according to the drainage capacity of the drain hose 5, and the amount exceeding the drainage capacity remains at the bottom side of the water tank 1, but the washing water and dehydration tank 3 rotates. The entire flow is discharged during the inertial rotation period (33 seconds) in which the number decreases, and therefore, the washing water that remains in the water tank 1 places a large load on the rotation of the washing and dewatering tank 3, putting a brake on the rotation. The hook does not lock and rotates smoothly, draining water efficiently.

To further explain this drainage method, the washing and dehydration tub 3 containing laundry and washing water is quite heavy, so when the washing and dehydration tub 3 is rotated by the motor 10 via a transmission mechanism, Since a large load is applied to the motor 10, a certain amount of time is required for the motor 10 to reach the rotational speed necessary to cause the water in the tank 3 to flow out from the upper part.

The width of the driving time and non-driving time and the number of repetitions of the driving time and non-driving time when the washing and dewatering tank 3 is intermittently driven one rotation during the time period allocated for the drainage process, and the number of repetitions thereof are set as described above. It is necessary to take into account the limitations of drainage capacity, unnecessary brakes or foam locks in the washing/dehydration tank 3, and avoidance of unnecessarily lengthening the duration of the drainage process.

We will discuss the results of an experimental investigation focusing on these points.

Here, let the time span of the drainage process be t.1. Drive time t□,
If the non-driving time is t2, then t=n (t, ±t2) where n is an integer, that is, t1 to t2 are repeated n times during the drainage process.

The washing capacity is 2.5 kg, the amount of washing water is 25 t, and the constant rotation speed of the washing and dehydrating tank 3 is 90 Or when continuously rotating.
According to a general fully automatic washing machine structure where , p, and m, if the driving time width t1 is not 15 seconds, residual water will be seen after the draining process is completed after t minutes, tl-27 seconds, t2ζ33 seconds, t= 3 minutes,
Therefore, the intermittent drive of n-3 was obtained as the optimal setting value from the structural standpoint of a fully automatic washing machine.

This experimental data is shown in FIG. This is based on the drive time t1 as the horizontal axis, and how much water remains for various values of tl, and the height of the water remaining in the washing and dehydrating tank 3 as the vertical axis. There is.

The three characteristic curves a, b, and c are for t = 2 minutes. This is the data when set as 3 minutes and 4 minutes, and according to this, in the case of 3 curves, even if t1 is set quite large, there is a lot of residual water, and b, c
In the case of the curve, almost flat results close to zero are obtained when t1≧15 seconds.

Considering that it is preferable that the draining process time width t is not too long, t=3 minutes is the best example.

Therefore, tl needs to be set at least 15 seconds,
tl with the lowest possible number of repetitions of intermittent rotational drive;
The value of t2 is suitable for commercialization, and although it is not directly determined from this experimental data, when compared with the structure of the fully automatic washing machine and the structure of the time switch itself, the value of t2 is suitable for commercialization.
l-? 27 seconds, t2''; 33 seconds were obtained.

Incidentally, the setting time is t=3 minutes, t1=27 seconds, t2=3
The numerical value of how water is drained in 3 seconds, ie, n-3 times, is as follows.

Incidentally, this indicates the ratio of the amount of water remaining in the washing/dehydration tank 3 after washing or rinsing to the amount of water that flows out due to each intermittent rotational drive.

According to this, with a general drainage hose of approximately 1 m, the intended drainage has already been completed by the second intermittent rotation drive, and even with the addition of an extension hose (2 m + 15 (b)), a small amount of water remains. It can be seen that the water is drained by .

Therefore, if only a general drainage hose is used, the third intermittent rotating drive will perform a work equivalent to dewatering work rather than drainage work, but in order to adapt to various embodiments, this time It is necessary to set up

Since the conical washing and dewatering tank 3 has a tapered shape that expands upward, the inner wall of the tank can be successfully raised when draining water by rotation.

Further, the time switch is generally configured to rotate each cam switch one pitch every minute.

Therefore, in the above equation t = n (tI +12), t
is preferably selected as an integer such as 1°2.3..., and furthermore, as mentioned above, tl''-, 27 seconds, t2ζ
It can be seen that the value of 33 seconds can be obtained by using the same reversing cam switches R and S that control the rotation of the pulsator 2 during the washing or rinsing process, or by using them in combination.

This is a very favorable condition for the design of the time switch.
Therefore, a low-cost time switch can be expected.

In the next rinsing process, power is again supplied to the water supply valve 9 via the a contact of the cam switch S1, the cam switch S4 is switched to the a contact again, the pulsator 2 is driven in reverse, and so-called overflow rinsing is performed.

The next drainage process is exactly the same as the previous drainage process, followed by a dewatering process.

For dewatering, contact b of cam switch S1 and cam switch S
The washing and dewatering motor 11 is continuously rotated in a single direction through the b contact of No. 2, regardless of the reversing cam switches R and S, and the washing and dehydration tank 3 is rotated at high speed to remove the object from being dehydrated 6. Drain the water.

The rinsing, draining, and dewatering steps after the dehydration step are work settings for improving cleaning, and the functions of each cam switch are the same as in the previous steps, so explanations will be omitted.

The fully automatic washing machine, which sequentially performs each process and performs predetermined washing, finishes its work when the time switch 8 is turned off.

As described above, according to the present invention, in a fully automatic washing machine that automatically sequentially performs a series of processes such as washing, draining, rinsing, and dehydrating, the draining water is driven intermittently to rotate a conical washing and dehydrating tank. As a result, the water drains from the top to the water tank side, so there is no need to provide a drainage passage at the bottom of the tank as in the past, and it is possible to provide a dehydrating washing machine that does not require a drain valve that causes noise. By performing this by intermittent rotation of the washing and dehydrating tank, efficient drainage work can be carried out without the wastewater stagnating at the bottom of the tank.
This eliminates the situation where the rotation of the washing and dehydrating tub is locked due to the generation of bubbles as in the past.

The intermittent rotation of the washing and dewatering tank is controlled by the reversing cam switches R and S, which reversely control the pulsator during the washing or rinsing process, and the washing and dewatering motor is controlled by another cam switch S4, which is opened during the draining process. Because this is done by intermittent power supply, it is not only structurally and cost-effective compared to, for example, a one-way clutch that continuously supplies power to the motor, but also eliminates unnecessary power supply to the motor, and the reversing cam Since the contact switching time width of the switches R and S provides an optimal value for drainage by intermittent rotation, efficient drainage work can be carried out.

[Brief explanation of the drawings] Fig. 1 is a schematic diagram of a fully automatic washing machine according to the present invention, Fig. 2 is its electric circuit diagram, Fig. 3 is a program chart explaining its washing work contents, and Fig. 4 is a schematic diagram of a fully automatic washing machine according to the present invention. An explanatory diagram of intermittent rotational drive in the drainage process, and Figure 5 shows experimental data. 1: Water tank, 2: Pulsator, 3: Washing and dehydration tank, 4: Washing water, 5: Drain hose, 6: Laundry, 7: Time switch, 8: Water level switch, 9: Water supply valve, 10: Washing and dehydration 5o-84: Cam switch, R, S: Reversing cam switch, T, M: Timer motor.

Claims (1)

[Claims] 1 The water tank is equipped with a rotatable conical washing/dehydration tank without a hole with a pulsator rotatably placed in the center of the bottom, and each process such as washing, draining, rinsing, and dehydration is sequentially transferred using a time switch. In the dehydrating washing machine, the time switch incorporates a reversing cam switch for controlling the reversing drive of the washing and dehydrating motor to reverse the pulsator during the washing and rinsing processes,
A cam switch is inserted into the time switch and is inserted between one contact of the reversing switch and the motor, and is closed at least during the washing and rinsing processes, and opened during the draining process. A dehydrating washing machine configured to supply power to a motor, and by intermittent driving of the motor, a washing/dehydrating tank is intermittently rotated to drain water from the upper part of the tank to the water tank side.