JP2784107B2 - Fully automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a fully automatic washing machine.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Publication No. 3-11240, this type of fully automatic washing machine has been used to check whether the rotation speed of a dewatering tub during intermediate dewatering has risen to a predetermined rotation speed within a predetermined time. If it does not detect, and it does not reach the predetermined number of revolutions, it is determined that the dewatering tank has fallen into a bubble-restricted state, the intermediate dewatering process is stopped, the process moves to the next rinsing process, and the foam is diffused by supplying water. Eliminates bubble restraint. Then, the turbidity change of the water is optically detected at the time of rinsing, the rinsing condition is automatically determined, and the rinsing step is completed. In a fully automatic washing machine that controls the time of the rinsing step, the intermediate dehydration is stopped halfway, and the process shifts to the next rinsing step.

[0003]

[Problems to be Solved by the Invention]
Although there is little concern about rinsing due to the suspension of the intermediate dehydration step, it is said that there is little problem in practice, but in our experimental results, when the bubble was restrained, Fine bubbles are generated, and the same or higher rinsing frequency is required.

[0004] In particular, in a time-controlled type fully automatic washing machine without a turbidity detector for detecting a change in turbidity of water, when the foam is restrained, the washing is stopped during the first intermediate dehydration step. The squeezing of the washing water by dehydration and the diffusion of the foam by the rinsing were insufficient once, and the rinsing was insufficient.

[0005] In addition, the imbalance of the laundry during dehydration promotes foaming due to vibration, which also causes the foam to be easily restrained.

[0006]

Means for solving the problems: control means for sequentially executing each step such as washing, intermediate dehydration, and rinsing;
Detecting means for detecting the number of rotations of the aquarium;
A judgment is made as to whether or not a predetermined value has been reached within a certain time after driving.
And a rotation speed of the dehydration tub reaches a predetermined value.
If not, it is determined that the bubble has been trapped and the
In a fully automatic washing machine that stops the intermediate dehydration process,
When the inter-water dewatering step is stopped, the bubbles in the dewatering tank are washed with water.
Eliminating the foam diffusion step to erase and the bias of the cloth in the dewatering tank
Bubble correction correction process consisting of
Thereafter, the process is shifted to the intermediate dehydration step again .

[0007] If the bubble restraint is not eliminated even after the foam restraint correcting step has been performed a predetermined number of times, the operation is stopped and a warning or display is issued. And the cloth shift correction step.
Is the water level one step below the water level in the foam diffusion step.
Theta Ru is operated in a predetermined cycle.

[0008]

[Action] detects the rotational speed of the dewatering tank, the rotary speed within the time does not reach the predetermined value within a predetermined time, it is determined that the dehydration tub falls into bubbles constrained state, it stops during the dehydration step in the running , the process proceeds to bubble restraint correction process, and the water supply to the washing time and the same water level, foam
A diffusion step is performed to dissolve and diffuse the bubbles between the water tank and the dewatering tank in water.

Further, the process shifts to a cloth deviation correction step, in which the water level is lowered to one step below the washing water level at the time of drainage, and the pulsator is moved little by little to correct the cloth deviation.

Then, the process returns to the stopped intermediate dewatering step, and thereafter, the operation is performed according to the initially set program.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention shown in the drawings will be described below in detail. FIG. 1 is a block diagram showing a control system of a fully automatic washing machine in an embodiment of the present invention, and FIGS. 2 and 3 are flowcharts similarly.

1 is a water tank, 2 is a dehydration tank which also serves as a washing tank,
Many holes 2a are opened in the peripheral side wall. 3 is a pulsator, 4 is a water supply hose, 5 is a water supply valve, 6 is a water supply valve control unit,
7 is a drain hose, 8 is a drain valve, 9 is a drain valve control unit, 10
Is a pressure guiding pipe, 11 is a water level detector, 12 is a motor, 13
Is a motor control unit, 14 is a motor pulley, 15 is a pulley belt, 16 is a center pulley, 17 is a mechanical box having a built-in brake, clutch and speed mechanism, 18 is a pulse generator mounted on the same shaft as the center pulley 16, 19 is A rotation speed detection unit that detects the rotation speed from the output signal of the pulse generator 18, and the pulse generator 18 and the rotation speed detection unit 19 form a rotation speed detection device. Reference numeral 20 denotes an outer box which houses the water tank 1 and the control unit. Reference numeral 21 denotes an unbalance detector that detects an imbalance caused by a bias of the cloth during dehydration. Reference numeral 22 denotes a sequence control unit mainly composed of a microcomputer.

In the above configuration, during the washing process, information on the water level in the tank is given as pressure to the water level detector 11 through the pressure guiding pipe 10. When determining that the washing process has been completed, the sequence control unit 22 turns off the output to the motor control unit 13 and stops the motor.

The rotation of the motor 12 is transmitted to a mechanical box 17 by a motor pulley 14, a pulley belt 15, and a center pulley 16. Then, only the pulsator 3 rotates during the washing / rinsing process, and the pulsator 3 and the dewatering tub 2 rotate in the same direction during the dewatering process by the action of the clutch mechanism built in the mechanical box 17. That is, when the motor 12 is stopped at the end of the washing process, the pulsator 3 stops. After the motor stops, the counter of the microcomputer 22 is set to M = 0. Then, an ON signal is output to the drain valve control unit 9, the drain valve 8 is opened, and the water in the tank is drained through the drain hose 7. The water level detector 11 detects completion of drainage, and the signal is sent to the sequence control unit 2.
2, an ON signal to the motor control unit 13 is input,
The motor 12 is driven. The rotation of the motor 12 is linked to the rotation of the dewatering tank 2 and the pulsator 3 from the center pulley 16 by the function of the clutch mechanism built in the mechanical box 17. That is, the dewatering tank 2 rotates and the centrifugal force causes
Intermediate dehydration starts, squeezing out the water contained in the laundry. At the same time, the sequence control unit 22 starts counting the intermediate dewatering time t. Normally, 1 when no bubble constraint occurs
Within 0 seconds, the rotation speed of the dewatering tub 2 rises up to high speed rotation.

On the other hand, in the bubble-constrained state, the dewatering tank 2 only rotates slowly and does not enter high-speed rotation forever. FIG. 4 shows the relationship between the elapsed time and the number of rotations. Therefore, when the intermediate dewatering time t reaches the predetermined time t ₁ ,
From the output of the rotation number detecting unit 19 detects the rotational speed N of the dewatering tank 2, if the comparison between the predetermined rotational speed N _1, can be detection of the presence or absence of the bubble restraint.

The number of rotations of the motor is n ₁ , the motor pulley 14
Assuming that the pulley ratio of the center pulley 16 is P ₁ and the number of magnetic poles of the pulse generator 18 is P ₂ , the center pulley 1
The rotation number 6 is represented by n ₁ × P ₁ , and the rotation number N of the dewatering tank 2 is also represented by N = n ₁ × P ₁ . Since the output pulse number P ₃ of the pulse generator 18 is equal to the number of rotations of the center pulley 16 multiplied by P ₂ , P ₃ = n ₁ × P ₁ × P ₂ = N × P _{2 and} the output pulse of the pulse generator 18 rotational speed of the relationship between the number and dewatering tank 2, if P ₃ = N × P ₂ normal rotational speed N of the dehydrating tub 2 represented by rises to _one or more predetermined rotational speed N, as a predetermined intermediate dehydration continue to intermediate dewatering until time t ₂ comes, it stops driving the motor 12. The spin-drying tub 2 that has been rotating at a high speed rotates by inertia. The sequence control unit 22 counts the inertial dehydration time t ′, and when a predetermined time t ₃ is reached, outputs an OFF signal to the drain valve control unit 9 to close the drain valve 8, and the brake mechanism built in the mechanical box 17 uses The dewatering tank 2 is stopped. Then, an ON signal is output to the water supply valve control unit 6 to open the water supply valve 5, and water is supplied for the first rinse.

On the other hand, when a bubble restrained state is detected,
<Shifts to N ₁ next bubble restraint correcting step. Since the rotation of the dewatering tank 2 is very slow, almost no inertial rotation, stops driving the motor 12 to close the drain valve 8 if the above as well as inertial dewatering time t '= t _3, the brake mechanism To stop the dewatering tank 2.

Then, the operation M = M + 1 is performed in the microcomputer 22 (M = 1 is input since M = 0 is reset when the motor is stopped). M counts the number of shifts to the foam constraint correction process, and if the preset number of shifts to the foam constraint correction process M ₁ (M ₁ = 2 in the embodiment) is M <M ₁ , the water supply valve 5 is opened. Supply water for the first rinse.

In the bubble-constrained state, the bubbles collected between the water tank 1 and the dewatering tank 2 start to be supplied with water.
In the dehydration tub 2 through a, it is dissolved and diffused in water while returning. When the water supply to a predetermined level of foam diffusion process, operating t ₆ hours foam diffusion process (basically set the performs the same motor driving the washing step bubbles in the water flow easily diffused in water).

Next, the cloth skew correction step (the motor drive is operated in small steps with the water level being one step below the water level in the foam diffusion step. For example, clockwise rotation 0.5 seconds-stop 0.5 seconds-counterclockwise rotation 0.
After correcting the deviation of the cloth, the process returns to the original main program, and the rinse I process is repeated. Then, when performing the intermediate dehydrating again, if the rotational speed N is N ≧ N _1, it stopped for a predetermined time t ₂ has elapsed after the motor 12, by closing the drain valve 8, along the following sequential main program performs the water supply Drive.

[0021] However, in the above case, when the rotational speed N is detected the N <is the re-foaming restrained N ₁ and stopping the motor drive to close the inertia time t '= t ₃ after drain valve 8, the microcomputer 22 The counter calculates M = 1 + 1 by the calculation of M = M + 1.
(Because M = 1 was set when shifting to the first bubble constraint correction chart), M = 2 was substituted (M
Set to _{1 = 2), M ≧ M} 1 becomes, and displays a warning on the display unit of the washing machine main body (not shown), to stop the operation performs an operation such as issuing an alarm.

[0022] The like, the number M ₁ to shift to bubble restraint modifications and usage of the washing machine, by determining in advance from results of various experiments, to prevent the transition to bubble restraint correction process unnecessarily In addition to preventing waste of water and electricity, a warning can be displayed because the detergent is overused.

It should be noted that when an abnormal vibration of the water tank occurs due to the imbalance caused by the imbalance of the cloth at the time of dehydration, an unbalance detector 21 for detecting the magnitude of the amplitude is provided. The dehydration process of the main program is stopped, and the process is shifted to a separately provided process.
Stop, close the drain valve, supply water, rinse,
In a washing machine provided with a control method so as to shift to the cloth deviation correction step and return to the dehydration step of the main program again, the unbalance correction step may be used for the foam restriction correction step. In this case, processing can be performed by the same program in the microcomputer 22, which is advantageous in terms of memory capacity and can be inexpensive.

[0024]

As described above, according to the control method of the present invention,
When dewatering tank during interim dehydrating falls into bubbles constrained state, stop intermediate dehydration step, more water injection to foam bubbles constrained correcting step given
The water is erased by the water current, so the laundry is not damaged and noise is generated.
There is no danger. Further, after performing the bubble restraint correcting step, rinsing the Tokoro Teikai number is performed, lack rinsing If you have shifted to conventional next rinsing process is eliminated.

In addition, the number of times of the bubble restraint correction process is set in advance, and when the bubble restraint is not resolved by the set number of times, the operation is stopped, and a warning or display notification means is provided. As well as repeating the extra repair process, preventing wasted water and electricity,
If forced, the user can be notified of excessive use of the detergent.

Furthermore, by incorporating a cloth deviation correction step in the bubble restriction correction step, when intermediate dewatering is performed again after the bubble restriction, the promotion of foaming due to imbalance caused by the cloth deviation is reduced, and the foam restriction is performed again. Can be prevented.

It should be noted that since the bubble restraining correction process of the present invention can be provided without using a rinsing degree detecting device such as a special turbidity detector, there is also an advantage that the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control system of a fully automatic washing machine according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a process from the washing process to the stop of the operation.

FIG. 3 is a continuation flowchart of FIG. 2;

FIG. 4 shows the relationship between the elapsed time during the intermediate dehydration and the rotation speed of the dehydration tub.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water tank 2 Dehydration tank 12 Motor 18 Pulse generator 19 Number of rotations detection part 21 Unbalance detection device

Claims (3)

(57) [Claims] 1. Steps such as washing, intermediate dehydration, and rinsing are sequentially performed.
Control means for executing, a detecting means for detecting the number of rotations of the dewatering tub in the intermediate dewatering step , and a determining means for determining whether or not the number of rotations has reached a predetermined value within a certain time after driving the motor. If the rotation speed of the dehydration tub does not reach a predetermined value,
The intermediate dehydration step that is determined to be in
In the fully automatic washing machine to be stopped, when the intermediate dewatering step is stopped, foam in the dewatering tub is removed.
A foam diffusion step to erase with water, and a shift of the cloth in the dewatering tank
A foam constraint correction process consisting of a cloth piece shift correction process to be corrected
A fully automatic washing machine , wherein after performing the operation, the process shifts to the intermediate dewatering step again . 2. The method according to claim 1, further comprising: an operation stopping means for stopping the operation when the bubble restraint is not resolved even after performing the foam restraint correcting step a predetermined number of times, and a notifying means. Fully automatic washing machine. 3. The method according to claim 2 , wherein the step of correcting the deviation of the piece of cloth includes the step of
The pulsator is set to a water level one step lower than
2. The fully automatic washing machine according to claim 1, wherein the washing machine is operated with a.