JPH01244800A - Method for controlling washer operation - Google Patents

Abstract

PURPOSE:To prevent the outflow of the washing liquid of a washing-dewatering shared tank and to improve a washing performance by providing a rotating speed detecting means to detect the rotating speed of the washing-dewatering shared tank and executing a current flowing control to a motor to rotate-drive the washing-dewatering shared tank according to the output. CONSTITUTION:A speed generator 20 composed of a coil 20a and a magnet 20b at the inverse load side of the driving shaft of a dewatering motor 5 is provided as the rotating speed detecting means of the dewatering motor 5 and, in its turn, a washing-dewatering shared tank 7, the output of the speed generator 20 is introduced into a control device 21 with a microcomputer, and the output of the control device 21 is introduced through an amplifier 30 to the dewatering motor 5. In such a way, the occurrence of a fluctuation to an agitating torque given from the washing-dewatering shared tank to a laundry and the washing liquid due to a difference in inertia torques and a difference in power voltages generated from a difference in quantities of laundry can be prevented. As a result, the washing performance can be improved, and the outflow of the washing liquid can also be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for controlling the operation of a washing machine that allows not only rinsing but also washing of a small amount of clothes on the dehydrator side even in the case of a two-tub washing machine.

[Conventional technology]

Conventionally, two-tub washing machines that have both a washing mechanism and a dehydration mechanism have a washing tub with rotary blades and a dehydration receiving tank adjacent to each other inside the outer box, and a small space inside the dehydration receiving tank. A dehydration tank with holes is installed, washing and rinsing are done in the washing tub, and dehydration is done in the dehydration tank.

In addition, in recent years, it has been practiced to perform so-called water injection rinsing in a dehydration tank, in which water is injected from above during dehydration and detergent is discharged along with the dehydrated water.

By the way, current two-tub washing machines are becoming larger and can wash a large amount of clothes at once in the washing tub, and the operating time limit, the shape of the rotor blades, the rotational force of the rotor blades, etc. Designed based on capacity. Therefore, even if the amount of washing water used to wash a small amount of clothing is kept to a low level, more water and therefore detergent will still be used than necessary. In addition, because the rotation is too violent, there are problems such as damaging the clothing or causing it to lose its shape, and this tendency is particularly noticeable in the case of delicate fibers.

Therefore, the applicant first filed Utility Application No. 160336 (Sho 62-160336) (filed October 20EI, 1988) and Japanese Patent Application No. 1988-
No. 299380 (filed on November 27, 1986), the following washing machine dehydrator was proposed.

As shown in Fig. 5, a washing tub (not shown) having rotary blades and a water receiving tank (3) are provided adjacent to each other inside an outer box (1), and further inside the water receiving tank (3). A washing/drying tank (7) as shown below is installed in the washing machine.

This washing and dehydration tank (7) has a dehydration hole (9) only in the upper part of the surrounding side wall, and the lower part is a gutter-like water storage part (7a) that is completely closed without forming not only a dehydration hole but also a drainage hole. A plurality of vertical blade bodies (8) extending up to the bottom surface were provided protruding from the inner peripheral surface of the water storage portion (7a) at appropriate intervals.

The blade body (8) is a separate body that is used as a washing and dehydrating tank (7).
), or may be integrally molded with the washing/drying tank (7).

A mounting bracket (18) is provided on the outer surface of the bottom of the washing and dehydration tank (7) using bolts (16) and naphts (17).
The dehydration shaft (18) is connected to the dehydration motor (5) via
6) Install. In the figure (19) is the washing and dehydrating tank (7)
A cover disposed inside the bottom of the mounting bracket (18).
The fixing plate (22) is covered with the fixing plate (22).

In the figure, (4) is the drainage hose at the bottom of the tank (3), (13) is the dewatering cover provided on the top opening of the water tank (3), and (10) is the drain hose at the bottom of the tank (3).
) is the dehydration lid above it, and the dehydration lid (10) is linked with the operation wire (15) of the brake mechanism (14) provided in the middle of the dehydration shaft (6), and when the dehydration lid (10) is opened. The brake mechanism (14) operates and the washing and dehydrating tank (7)
Rotation is stopped for safety.

A normal amount of laundry is washed and rinsed in the washing tub, and the washing/drying tub (7) is used for dewatering, rinsing, or only dehydration.

In this case, the washing and dehydration tank (
7) rotates continuously in one direction at high speed.

Then, as rotational force is applied to the washing machine, dehydration is performed by centrifugal force, and the water poured out is discharged from the top opening of the washing/dehydration tank (7) and the dehydration hole (9) to the dehydration receiving tank (3). is,
Furthermore, it is disposed of outside the machine using the drainage hose (4).

On the other hand, if the /9c'tM machine has a small capacity and you want to wash without using the washing tub, first open the spin-drying lid (10), put the clothes in the washing/spin-drying tub (7), and then press the water supply switch cock. (not shown) to the "spin-drying tank side" and move the water flow selector switch (not shown) to the water storage section (
7a) When the water reaches the specified water level, turn off the water supply and add detergent.

Next, by rotating the dewatering motor (5) in the forward and reverse directions, the washing and dehydrating tank (7) is also rotated intermittently or repeatedly in forward and reverse directions, and the impeller (8) in this tank (7) is rotated between clothes and clothes. Washing is done by stirring the water.

After the set time has passed and the washing is finished, the washing and dehydration tank (7) can be continuously rotated in one direction, and the water will flow through the opening top of the washing and dehydration tank (7) and the dehydration hole (9) at the top of the side wall. After the water is drained, further dehydration is performed.

Further, when rinsing is performed in the dehydration tank (7), the process is the same as the case of washing except that no detergent is added.

By the way, in the conventional washing machine having the washing and dehydrating tub (7) shown in FIG.
and a neutral point C (none of which is closed), and by tilting this contact point to any of positions a, b, or c, the washing and dehydration tank (7) is continuously operated by the dehydration motor (5). There are two types of rotational drive: one is rotationally driven, and the other is intermittently driven. In the figure (37) is the dehydration lid (10)
The lid switch is activated by opening and closing the lid.

That is, when washing and rinsing a normal amount of laundry in the washing tub, and performing spin-rinsing or only spin-drying in the washing/drying tub (7), the operation knob of the timer (36) is shown in Fig. 7. When set to the dehydration process, contact T1 of the timer (36) closes to a, and the dehydration motor (5)
As a result, the washing and dewatering tank (7) continuously rotates at high speed.

After a certain period of time, the contact T1 moves to the C position, the dehydration motor (5) is no longer energized, and the dehydration process is completed. Also, when the dehydration lid (10) is opened, the lid switch (37)
Needless to say, it closes and dehydration stops.

Next, set the knob of the timer (36) to "Wash/Rinse" in the program shown in Figure 7, then turn the dehydration lid (1
Close 0).

Now, the contact T1 of the timer (36) intermittently repeats the movement between a, b, and c at the preset time, and the dehydration motor (5) is intermittently driven, and as a result, the washing and dehydration tank (7) is also intermittently rotated and washed.

When the set time has passed and the washing is finished, the process moves to the dehydration process, contact T1 of the timer (36) closes to a, the dehydration motor (5) rotates forward, and the washing and dehydration tank (7) rotates continuously. Drainage and dewatering are performed.

[Problem to be solved by the invention]

If the rotation of the washing and dehydration tank (7) is controlled only by time-limited control using such a cam timer (36), the washing and dehydration tank (7) may )
Fluctuations occur in the agitation rotational force applied to the laundry and washing liquid in the washing machine, which not only causes uneven washing and washing liquid outflow, but also when the inertial rotational speed of the washing and dewatering tub (7) is particularly high, the timer (36 ), there was a risk that the rotation could not be reversed due to insufficient control, resulting in intermittent rotation.

In addition, in order to prevent this, the output torque of the dewatering motor (5) must be designed to be sufficiently larger than the required load torque, resulting in problems such as not only increased size but also increased cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a washing machine which eliminates the disadvantages of the conventional example, prevents the washing liquid from flowing out of the washing and dehydrating tub, has good cleaning performance, and is inexpensive.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a large number of dewatering holes only in the upper part of the side wall, a completely closed water storage part in the lower part, and a vertical blade body protruding inward from the water storage part. A washing machine with a washing and dehydrating tank rotatably installed inside the water receiving tank.
The machine is provided with a rotational speed detection means for directly or indirectly detecting the rotational speed of the washing and dehydrating tub, and energization of the motor that rotationally drives the washing and dehydrating tub is controlled in accordance with the output of the rotational speed detecting means. The gist of this is that

[Effect]

According to the present invention, the rotation of the drive motor of the washing/dehydration tub is controlled according to the detection result of the rotational speed detection means, so that the washing/dehydration tub may rotate at a speed higher than necessary due to the action of centrifugal force or the like. When the motor is about to rotate, the power to the motor is cut off to reduce the rotation speed, and when the rotation speed falls below a certain level, the motor is rotated in the opposite direction, thereby achieving smooth forward and reverse rotation with less influence of inertial rotation.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the washing machine operation control method of the present invention, and FIG. 2 is a block circuit diagram of the same. In FIG. 1, the same reference numerals are given to the same components as in FIG. 5 showing the conventional example.

That is, the washing machine used in the present invention is as described in FIG. (3), a dehydration hole (9) is drilled only in the upper part of the surrounding side wall,
The lower part is a completely closed gutter-shaped water storage part (7a) with no dewatering hole or drainage hole formed, and a plurality of vertical blade bodies (8) reaching the bottom surface are provided on the inner peripheral surface of this water storage part (7a). Washing and dehydration tanks (7) are installed at appropriate intervals.
This washing and dehydrating tub (7) is connected to a dehydrating motor (5) installed in the bottom frame (2) by a dehydrating shaft (6), and is driven to rotate at high speed by the rotation of the motor (5). The blade body (8)
It is also possible to form a separate body integrally with the washing/drying tank (7).

The washing and dehydrating tank (7) has a port (16) on the outer surface of the bottom,
A mounting bracket (18) was provided at the oak 1 (17), and the dewatering shaft (6) was attached via this mounting bracket (18). In the figure (1
9) is a cover disposed inside the bottom of the dehydration tank (7).

The above is the same as the conventional one, but in the present invention, for example, a speed generator (20) consisting of a coil (20a) and a magnet (20b) is installed on the opposite load side of the drive shaft of the dehydration motor (5). 5), and by extension, the washing and dewatering tank (7), the output of this speed generator (20) is introduced into a microcomputer-based control device (21), and the output of the control device (21) is was introduced into the dehydration motor (5) via the amplifier (30).

As shown in FIG. 2, the speed generator (20) has a coil (2
0a) is connected to the diode (23) via the resistor A (22),
It is connected to a waveform shaping circuit composed of a capacitor (24), a transistor (25), and a resistor B (26), and the speed generator generated voltage waveform (34) generated in the coil (20a) as shown in Fig. 3 is a rectangular wave. The period T is detected by the control device (21) and the rotational speed is measured.

In Figure 2, (28) is the power supply, (29) is the display, (31
) indicates an operation switch section, and (32) indicates a part of other sensors.

In accordance with the flowchart of FIG. 4, a case will be described in which a small amount of laundry is washed using the washing and dehydrating tub (7).

First, open the spin-drying lid (10), put the laundry in the washing/spin-drying tank (7), add detergent, and set the water supply switch (not shown) to the "spin-spinning tank side" to start washing/spin. Supply water into the water storage section (7a) of the dewatering tank (7), and when the water reaches a predetermined level, stop the water supply [step (a)], and then press the operation switch section (31).
For example, set 5 minutes for washing and 1 minute for dehydration (including drainage) [Step (B)].

At this time, the flags necessary for washing operation (SONF=0, R&L
It goes without saying that F=1) is set.

Immediately after setting, 5ONF = 0 (step (c)), and since the dewatering motor (5) is not moving, the rotation speed is also 0 [step (d)], and the flow is R&LF.
= 1 (step (e)), so the dehydration motor (
5) is given a signal from the control device (21) via the amplifier (30) to rotate in the normal rotation direction. If the washing time is within the set 5 minutes [Step (S)], the rotation speed of the dehydration motor (5) is set to 20, which has been experimentally determined in advance.
The current is applied until it reaches 0r/m. When it becomes 20 Or/m or more, 5ONF is set and the power supply to the dewatering motor (5) is stopped [step (to)].

Next is the washing and dehydration tank (7), i.e. the dehydration motor (5).
rotates due to inertia, and the 30r/
m or less [Step (G)], 5ONF is reset, R&LF is reset [Step (H)], and then the dehydration motor (5) is energized in the reverse rotation direction [Step (E)]. .

By repeating the above steps, the dewatering motor (5) is driven intermittently. As a result, the washing and dehydrating tank (7) is also rotated forward and backward, and the impeller (8) in the washing and dehydrating tank (7) agitates the clothes and water, and the washing is carried out for 5 minutes [step ( vinegar)〕.

As described above, the rotational speed of the dewatering motor (5) is detected to control the energization, and this is done in the following manner.

In the embodiment of the present invention, the speed generator (20) uses 32 poles, and when the dehydration motor (5) rotates once, the magnet (20b) attached to the motor shaft rotates once, as shown in FIG. Outputs 16 sine waves.

For example, the washing and dehydration tank (7) or the dehydration motor (
5) is rotating at 20 Or/m.
The period T per -sine wave of 0) is calculated as follows.

f 16 200r/mX 1/60 1
6 = 18.75 m5ec This period T = 18 + 75 m5 in the control device (21)
By monitoring ec, it is possible to determine the rotational speed of 200 r/m.

Similarly, rotation speeds other than 30 r/m can be detected.

Resistor A (22), diode (23), capacitor (24), transistor (25), resistor B (26)
It is converted into a 5V rectangular wave using a waveform shaping circuit.

When washing is completed, the process moves to dehydration (including drainage), the dehydration motor (5) is energized in the forward rotation direction [Step (N)], dehydration is carried out for 1 minute, and ends after 1 minute [ step (ru) (o)].

Water is drained and dehydrated from the upper opening of the washing/dehydrating tank (7) and the dehydrating hole (9) at the upper side wall, as in the conventional case. Further, when rinsing is performed in the washing and dehydrating tank (7), the process is the same as when washing, except that no detergent is added.

On the other hand, when performing normal dehydration in the washing and dehydration tank (7),
If only dehydration is set at the cent stage of the process, dehydration will start from step (nu).

In the above embodiment, a 32-pole speed generator fl (20>) was used to detect the rotational speed, but there is no need to be particular about this number of poles, and a photointerrupter, Hall element, reed switch, etc. can be used as the rotational speed detection means. Furthermore, it is also possible to provide a rotational speed detection means not on the drive shaft of the motor but on the dehydration shaft of the washing and dehydration tub to directly detect the rotational speed.

Furthermore, although the case has been described in which a washing and dehydration tank is provided on the dehydration tank side of a two-tank type washing machine, the present invention can also be applied to a fully automatic type washing machine.

〔Effect of the invention〕

As described above, in the washing machine operation control method of the present invention, a large number of dehydration holes are bored only in the upper part of the side wall, the lower part is a completely closed water storage part, and the water storage part is inwardly directed vertically. In a washing machine in which a washing/drying tank with a protruding blade body is rotatably installed in a water receiving tank, the washing/drying/drying tub is rotatably installed in the water receiving tank. It is possible to prevent fluctuations in the stirring rotational force that the dehydration tank applies to the laundry and cleaning liquid.

As a result, the cleaning performance is improved, the outflow of the cleaning liquid can be prevented, and the drive motor can be small and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the method for controlling the operation of a washing machine according to the present invention, FIG. 2 is a block circuit diagram of the same as the above, FIG. FIG. 5 is a partial longitudinal sectional side view of a washing machine according to the conventional example, FIG. 6 is an electric circuit diagram showing the conventional example, and FIG. 7 is an explanatory diagram of the operation of the conventional example. (1)... Outer box (2)... Bottom frame (3
)...Water tank (4)...Drain hose (5
)...Dehydration motor (6)...Dehydration shaft (7)
...Washing/dehydration tank (7a)...Water storage section (8)...
・Blade body (9)...Dehydration hole (10)...
Dehydration lid (13)...Dehydration receiver cover (14)
... Brake mechanism (15) ... Operation wire (
16)...Bolt (17)...Nut (18)...Mounting bracket (19)...Cover (20)...Speed generator (20a)...Coil (20b)... Magnet (21)...Control device (22)...Resistance A (23)...
Diode (24)...Capacitor (25)...Transistor (26)...Resistor B (28)...Power supply (29)...Display (30)...Amplifier (31)... - Operation switch part (32)... Some other sensors (34)... Speed generator generated voltage waveform <35)...
Shaped voltage waveform (36)...Timer (37)...
・Lid Switch Agent Patent Attorney Masuo Ohone Figure 1 Figure 4 Figure 5

Claims (1)

[Claims] A washing/dehydration tank is constructed by drilling a large number of dehydration holes only in the upper part of the side wall, with a completely closed water storage part in the lower part, and vertical blades protruding inward from the water storage part, and a water receiving tank. In a washing machine that is rotatably installed inside the washing machine, a rotation speed detection means for directly or indirectly detecting the rotation speed of the washing and dehydration tub is provided, and the washing and dehydration tub is rotationally driven in accordance with the output of the rotation speed detection means. A method for controlling the operation of a washing machine, the method comprising: controlling energization of a motor.