JPH11262595A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a prescribed rinsing and dehydrating performance by early detecting the generation of a large quantity of bubbles in a rotary drum to carry out a countermeasure against bubbles for a washing machine which carry out washing, rising, and dehydrating in a rotary drum rotatably set centering on a horizontal shaft. SOLUTION: This washing machine is equipped with a rotary drum rotatable in a water receiving tank elastically supported in the washing machine main body and a control means 28 controls a first motor 19 to drive the rotary drum, a second motor 20, a drain pump 16 to drain water in the water receiving tank, etc. The control means 28 judges that the amount of bubbles is excessive when a changing amount of water level per a prescribed time detected by a water level detecting means 24 is higher than a first prescribed quantity driving the drain pump 16 at the completion of the washing process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for washing, rinsing and dehydrating laundry in a rotating drum arranged rotatably about a horizontal axis.

[0002]

2. Description of the Related Art Conventionally, this type of washing machine has been configured as shown in FIG. Hereinafter, the configuration will be described.

[0003] As shown in the figure, a rotary drum 1 is provided with a large number of water passage holes 2 on the entire periphery thereof and is rotatably disposed in a water receiving tank 3. The horizontal axis 4 is set at the rotation center of the rotating drum 1
Is fixed, and a drum pulley 5 is fixed to the other end of the horizontal shaft 4. The motor 6 is connected to the drum pulley 5 by a belt 7 and drives the rotary drum 1 to rotate. A cover 8 is provided at the opening of the rotating drum 1 so as to be openable and closable.

The water receiving tub 3 is provided with a spring body 1 from the washing machine body 9.
The washing machine is suspended at 0, and is supported by an anti-vibration damper 11 so that vibration during dehydration is not transmitted to the main body 9 of the washing machine, and a weight 12 for reducing vibration during dehydration is provided. The heater 13 heats the washing water in the water receiving tub 3. The control device 14 controls operations of the motor 6, the heater 13, and the like, and sequentially controls a series of processes such as washing, rinsing, and dehydration.

[0005] The water supply valve 15 is for supplying water in the water receiving tank 3, and the drainage pump 16 is connected to the water receiving tank 3 with a hose 17 to drain the washing water in the water receiving tank 3. The lint collection filter 18 is connected between the hose 17 connected to the water receiving tank 3 and the drainage pump 16 and removes lint, dust and the like in the drained washing water.

The operation of the above configuration will be described.
, The laundry is put into the rotating drum 1 and the operation is started. When the rotating drum 1 is rotated at a low speed by the motor 6, the laundry in the rotating drum 1 is lifted and dropped, and this operation is continued. Water is supplied from the water supply valve 15. When a predetermined amount of water is supplied, the supply of water is stopped and washing is continued, and the laundry in the rotating drum 1 is lifted and dropped on the water surface. Thus, the washing process proceeds.

After the washing step, the drainage pump 16 is driven to drain the water. If necessary, the rotary drum 1 is rotated at a high speed while the drainage pump 16 is driven to perform intermediate dewatering, and the rinsing step is started. The same operation as the washing process is performed in the rinsing process. In the dehydration process, the rotating drum 1 is driven to rotate at high speed, and the laundry is centrifugally dehydrated. At this time, the rotating drum 1
When the laundry in the interior is shifted, that is, imbalance occurs, the rotating drum 1 and the water receiving tub 3 vibrate, but the vibration is damped by the vibration damper 11 and is not transmitted to the washing machine main body 9.

[0008]

In such a conventional structure, even after draining after the washing process, for example, when a foaming detergent is used or when the amount of the detergent is extremely increased with respect to dirt. When the rotating drum 1 is driven at a high speed, a large amount of bubbles fills the space between the rotating drum 1 and the water receiving tank 3 when a large amount of bubbles is left and intermediate dehydration is started. The foam acts as a brake against the rotation of the rotary drum 1, the rotation speed of the rotary drum 1 does not reach the predetermined rotation speed, and the dewatering performance decreases. As a result, the rinsing performance in the next rinsing process decreases, and Although the rinsing performance cannot be obtained, there is a problem that it is impossible to judge that there is a large amount of bubbles until it is detected that the rotating drum 1 does not reach the predetermined number of revolutions.

[0009] In addition, intermediate dehydration is started, and bubbles are generated on the rotating drum 1.
There is a problem that the user can be notified only after a large amount is generated by stirring due to the rotation of. In addition, since a large amount of bubbles are generated, there is a problem that a defoaming sequence for eliminating bubbles takes time.

When the drainage pump 16 is driven during the drainage process, the water in the water receiving tank 3 enters the drainage pump 16 through the drainage hose 17 and is discharged when the drainage pump 16 is turned on. If a large amount of lint and dust adheres to 18 and it is difficult to drain the water, the user cannot be notified of the abnormality. Had the problem of not being aware.

Also, due to the drainage before the dewatering, the amount of water contained in the clothes is small at the upper part of the clothes and large at the lower part, causing imbalance, and it takes time to start the rotating drum 1 at a predetermined number of rotations and dewater. There was such a problem.

The present invention solves the above-mentioned conventional problems. In order to detect the occurrence of a large amount of foam on the rotating drum at an early stage and to take measures against the foam in a short time, a predetermined rinsing performance and dehydration performance can be obtained. The first purpose is to be able to be used.

[0013] Further, before a large amount of lint adheres to the lint collection filter and the drainage becomes almost impossible, the user is informed of a decrease in drainage capacity, and the user can clean the lint collection filter before the drainage time is extended. The second object is to do so.

In addition, by rotating the rotating drum 1 every predetermined time during drainage performed before the dewatering process, the bias between clothes having a high water content and clothes having a small water content is reduced, and the rotating drum 1 can be rotated in a short time during dewatering. A third object is to increase the number of revolutions to reduce the time.

[0015]

According to the present invention, in order to achieve the first object, a rotary drum is rotatably disposed in a water receiving tank elastically supported in a washing machine body, and is controlled by control means. It controls the operation of a motor that drives the rotating drum, a drainage unit that drains water in the water receiving tank, and the like. At the end of the washing process, the control means determines that the amount of foam is excessive when the amount of change in water level per predetermined time detected by the water level detection means while driving the drainage means is equal to or greater than a first predetermined value. Things.

[0016] This makes it possible to detect bubbles at an early stage before a large amount of bubbles is generated in the rotary drum during the spin-drying operation.
Foam measures can be taken in a short time. Further, predetermined rinsing performance and dehydration performance can be obtained.

Further, in order to achieve the second object,
A lint recovery filter is disposed between the water receiving tank and the drainage means. At the end of the washing process, the control means determines that the amount of change in water level per predetermined time detected by the water level detection means while driving the drainage means is the second. When the value is equal to or less than the predetermined value, it is determined that the drainage capacity is reduced due to clogging of the lint recovery filter.

Thus, the user can be notified of a decrease in drainage capacity before a large amount of lint or dust adheres to the lint recovery filter and drainage becomes almost impossible.

In order to achieve the third object,
The control means drives the drainage means while driving the rotary drum every predetermined time before performing the dewatering process.

Thus, it is possible to eliminate the bias between the clothes having a high water content and the clothes having a low water content, and to start up the rotating drum at a predetermined rotation speed in a short time during dehydration, thereby shortening the time.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a water receiving tank elastically supported in a washing machine main body, and a rotary drum contained in the water receiving tank and rotatably disposed. Controlling the operations of the motor for driving the rotating drum, drainage means for draining water in the water receiving tank, water level detecting means for detecting the water level in the water receiving tank, and the motor, draining means and the like. Control means, wherein at the end of the washing process, when the amount of change in water level per predetermined time detected by the water level detection means while driving the drainage means is equal to or more than a first predetermined value, the amount of foam is excessive. It is designed to judge that a large amount of foam has been generated in the rotating drum at an early stage, and can take a countermeasure for foam in a short time.
Predetermined rinsing performance and dehydration performance can be obtained.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided an informing means for performing an informing operation,
When the control means determines that the amount of foam is excessive, the control means notifies the user of the use of the foaming detergent by mistake, or promptly informs the user that the amount of the detergent has been excessively increased. You can let them know.

According to a third aspect of the present invention, in the first aspect of the present invention, the control means performs a defoaming sequence when it is determined that the amount of bubbles is excessively large. Bubble can be eliminated by a short defoaming sequence before a large amount of foam is generated.

According to a fourth aspect of the present invention, there is provided a water receiving tank elastically supported in the washing machine main body, a rotating drum included in the water receiving tank and rotatably disposed, and driving the rotating drum. A motor, drainage means for draining water in the water receiving tank, a lint recovery filter disposed between the water receiving tank and the drainage means, and a water level detecting means for detecting a water level in the water receiving tank. Control means for controlling the operation of the motor, drainage means, etc., the control means, at the end of the washing process,
When the amount of change in water level per predetermined time detected by the water level detection means while driving the drainage means is equal to or less than a second predetermined value, it is determined that the drainage capacity is reduced due to clogging of the lint recovery filter. In addition, a large amount of lint or dust adheres to the lint recovery filter, so that the user can be notified of a decrease in drainage capacity before almost no drainage is possible.

According to a fifth aspect of the present invention, there is provided a water receiving tank elastically supported in a washing machine main body, a rotating drum included in the water receiving tank and rotatably disposed, and driving the rotating drum. A motor, drainage means for draining water in the water receiving tank, and a water level detecting means for detecting a water level in the water receiving tank,
Control means for controlling the operation of the motor, the drainage means, etc., wherein the control means drives the drainage means while driving the rotary drum every predetermined time before performing a dewatering process. Thus, it is possible to eliminate the bias between the clothes having a high water content and the clothes having a low water content, and to start up the rotating drum to a predetermined number of rotations in a short time during dehydration, thereby shortening the time.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIGS. 2 and 3, a first motor (motor) 19 rotates the rotating drum 1 at a first rotation speed N1 (for example, 53 rpm) to perform washing or washing. The second motor (motor) 20 rotates the rotating drum 1 at a second rotation speed N2.
(Eg, at 1000 rpm) to spin off.
These first motor 19 and second motor 20 are constituted by induction motors,
2, and is connected to a driven pulley 23.

The driven pulley 23 has two types of reduction ratios. The first motor 19 is connected via a belt 21 to a driven pulley 23a having a large reduction ratio.
0 is set via the belt 22 to the driven pulley 2 having a small reduction ratio.
3b, and is fixed to the other end of the horizontal shaft 4 having one end fixed to the rotation center of the rotary drum 1.

The water level detecting means 24 is connected to the water receiving tank 3 and a magnetic material (both not shown) is fixed to a diaphragm which operates at a pressure corresponding to the water level in the water receiving tank 3.
This magnetic body is movably mounted on the center of a coil (not shown), an oscillation circuit is formed using the coil, and the magnetic body and the coil are moved by the movement of the diaphragm by the pressure corresponding to the water level in the water receiving tank 3. The water level in the water receiving tank 3 is detected by changing the positional relationship with the above, changing the inductance of the coil, and detecting a change in the oscillation frequency of the oscillation circuit.

The water supply valve 15 is connected to a water supply hose 25 to supply water to the water receiving tank 3, and a drainage pump (drainage means) 16 drains water to the outside through a drainage hose 26.

The control device 27 includes a first motor 19, a second motor
The motor 20 is controlled as shown in FIG. The control means 28 is constituted by a microcomputer, and includes a heater 13 and a water supply valve 1 via a power switching means 29 constituted by a bidirectional thyristor or the like.
5. Control the drainage pump 16, the first motor 19, the second motor 20, and the like to sequentially control a series of steps of washing, rinsing, and dehydrating. The heater 13 heats the washing water in the water receiving tub 3.

The input setting means 30 is for inputting a necessary setting course, start of operation and the like by the user, and is input to the control means 28. The notifying unit 31 includes a display lamp, a buzzer, and the like, and turns on the display lamp and sounds the buzzer according to a signal from the control unit 28. The rotation speed detecting means 32 detects the rotation speed of the rotary drum 1 by detecting the rotation speed of the first motor 19, and inputs the rotation speed to the control means 28. 33 is a commercial power supply, and 34 is a power switch.

The operation of the above configuration will be described.
Is opened, the laundry is put into the rotating drum 1, the power switch 34 is turned on, and then the operation is started by operating the start switch (not shown) of the input setting means 30 to drive the first motor 19 At the same time, the water supply valve 15 operates to supply water, and when the predetermined water level is detected by the water level detection means 24, the water supply is stopped. In the washing process, the rotating drum 1 is driven by the first motor 19 while replenishing water because water soaks into the laundry.
As a result, the laundry in the rotating drum 1 is lifted, dropped on the water surface, and washed.

At this time, the heater 13 is energized to heat the washing water in the water receiving tub 3. When the washing process is completed, the drainage pump 16 operates to drain the washing water in the water receiving tub 3. Thereafter, in the dewatering process via the rinsing process, the rotary drum 1 is driven to rotate at the second rotation speed N2 by the second motor 20, and the laundry is centrifugally dewatered.

Next, the operation of the drain stroke will be described with reference to FIG. The operation is started in step 40 of FIG. 4, the water level of the water receiving tank 3 is detected by the water level detecting means 24 in step 41, the timer built in the control means 28 is started in step 42, and the drain pump 16 is started in step 43. Turn on to start draining. 1 in step 44
When 0 seconds have elapsed, the water level is detected again by the water level detection means 24 in step 45. If the water levels detected in steps 41 and 45 are A0 and A1 (water column mm), the change in water level is | (A1-A0) | / 10 (unit: water column mm / second).

In step 46, the amount of change in the water level is compared with a first predetermined value t1 (water column mm / sec), and | (A1-A0) |
If / 10 <t1, the detergent is used normally,
Water (including a small amount of foam) has been discharged. Step 47
If the water level is equal to or higher than the reset water level (water column 90 mm), the timer built in the control means 28 is reset in step 48 and then restarted in step 49.

If the water level is equal to or lower than the reset water level in step 47, the timer is reset in step 50, then the drain pump 16 is turned off in step 51, and the process proceeds to the next step of step 52. At step 47, the water level is detected every 10 seconds from steps 44 to 49 until the water level becomes lower than the reset water level.

However, when the amount of the detergent is large with respect to the foaming detergent and dirt, the inside of the rotary drum 1 is filled with bubbles due to the rotation of the rotary drum 1 during washing. At this time, the water level detecting means 24 detects the water level from the pressure of a large amount of bubbles and a small amount of water. Therefore, if the detergent is used normally, water and a small amount of bubbles are discharged, and the water level decreases with a constant change as shown in FIG.

On the other hand, if there is a large amount of bubbles, the water level detecting means 2
Even if the water level is determined to be the same according to 4, there is actually only a small amount of water. When water remains, the change in water level is water column A
It is almost the same as 0 to A4mm, but when water runs out, water column A
It decreases sharply from 4mm to 4mm water column.

This is because the pressure of the bubbles was applied via the water, but the pressure of the bubbles was not transmitted to the water level detecting means 24 because the water was exhausted. Thus, |
When (B1-A4) | / 10> t1, it can be detected in step 53 that a large amount of bubbles have been generated.

As described above, according to this embodiment, at the end of the washing process, the water level detecting means
When the amount of change in the water level per predetermined time is equal to or more than the first predetermined value, it is determined that the amount of bubbles is excessively large. It is possible to take measures against bubbles in a short time. Further, predetermined rinsing performance and dehydration performance can be obtained.

(Embodiment 2) Notification unit 31 in FIG.
Comprises a display lamp, a buzzer, etc., and turns on the display lamp or sounds a buzzer according to a signal from the control means 28. When the control means 28 determines that the amount of bubbles is excessive, the notification means 31 gives a notification. Like that.
Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. The operation from step 40 to step 53 is the same as the operation of the first embodiment, and the description is omitted. When the bubble detection is performed in step 53, the control unit 28
In step 54, the notification means 31 turns on the display lamp or sounds a buzzer to notify the user that the detergent is not used properly.

As described above, according to the present embodiment, the control means 2
8 is to notify by the notification means 31 when it is determined that the foam is excessively large, so that the use of the foaming detergent by mistake, or the fact that the detergent amount is excessively increased before the foam is further increased by dehydration. In addition, the user can be notified early.

(Embodiment 3) Control means 28 in FIG.
, When it is determined that the amount of bubbles is excessive, a defoaming sequence is performed. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. The operation from step 40 to step 53 is the same as the operation of the first embodiment, and the description is omitted. When the bubble detection is performed in step 53, the control unit 28
Performs a defoaming sequence in step 55 and step 56
Then go to the next step. The defoaming sequence is, for example, to provide a rest time of about 2 to 3 minutes in order to erase a large amount of foam filled in the rotating drum 1 and wait for the spontaneous disappearance of bubbles. Since the bubbles are detected before the bubbles are filled in the rotating drum 1 by the dehydration, the amount of the bubbles is small, and the bubbles disappear naturally in a short pause time.

As described above, according to this embodiment, the control means 2
8 is to perform the defoaming sequence when it is determined that the amount of bubbles is excessively large, so that the bubbles can be eliminated in a short defoaming sequence before a large amount of bubbles is generated.

(Embodiment 4) Control means 28 in FIG.
When the amount of change in water level per predetermined time detected by the water level detection means 24 while driving the drain pump 16 at the end of the washing process is equal to or less than a second predetermined value t2, the drainage capacity due to clogging of the lint recovery filter 18 is reduced. It is determined to be lower. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. The operation starts in step 80, and in step 8
In step 1, the water level in the water receiving tank 3 is detected by the water level detecting means 24, and in step 82, the counter is set to zero. At step 83, a timer built in the control means 28 is started, and at step 84, the drain pump 16 is turned on to start draining.

After 10 seconds have passed in step 85, the water level in the water receiving tank 3 is detected by the water level detecting means 24 in step 86. If the water levels detected in steps 81 and 86 are A0 and A1 (water column mm), respectively, the amount of change in the water level is | (A1-A0) | / 10 (unit: water column mm /
Seconds).

In step 87, the amount of change in water level is compared with a second predetermined value t2 (water column mm / sec), and | (A1-A0) |
If / 10> t2, the drainage capacity is normal. If the water level is equal to or higher than the reset water level (water column 90 mm) in step 88, the timer built in the control means 28 is reset in step 89, the counter is set to 0 in step 90, and the timer is restarted in step 91. .

If the water level is lower than the reset water level in step 88, the timer is reset in step 92, the counter is set to 0 in step 93, the drain pump 16 is turned off in step 94, and the next step of step 95 is performed. move on.
Step 85 until the water level falls below the reset level in step 88
The water level is detected every 10 seconds from to.

Normally, when water is drained, the water level decreases as shown by A0, A1,..., A6 (straight line a) as shown in FIG. , The drainage capacity decreases, and the water level every 10 seconds decreases as A0, C1,..., C6 (straight line b). If the lint recovery filter 18 is completely clogged, the water level will not decrease (straight line c).

Therefore, in step 87, the amount of change in the water level is compared with the second predetermined value t2 (water column mm / sec), and | (C1−
A0) If | / 10 <t2, the counter is incremented by one at step 96. When the counter value becomes 3 or more in step 97, the lint collection filter 1 is set in step 98.
8 is detected, and the process proceeds to the next step in step 99.

The change in the water level is continuously changed to the second predetermined value t2.
If not, the counter is cleared at step 90. This is to prevent erroneous detection of clogging of the lint collection filter 18. When the clogging of the lint collecting filter 18 is detected, the user is notified by the notification means 31 or the like after the drainage process or after all the processes are completed.

As described above, according to the present embodiment, the water level is detected by the water level detecting means 23 while the drain pump 16 is driven, and the amount of change in the water level per predetermined time is equal to the second predetermined value t2.
In the following cases, it is determined that the drainage capacity is reduced due to the clogging of the lint collection filter 18, and the lint collection filter 1 is determined.
A large amount of lint or dust adheres to the surface 8 and it is possible to notify the user of a decrease in drainage capacity before almost no drainage is possible.

(Embodiment 5) Control means 28 in FIG.
Is designed to drive the drain pump 16 while driving the rotary drum 1 every predetermined time before performing the dewatering process. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. In step 100, the operation is started. In step 101, the water level in the water receiving tank 3 is detected by the water level detecting means 24. In step 102, as shown in FIG. Step 10
In a step 3, a timer built in the control means 28 is started. In Step 104, the water level is detected again, and Step 10
If the water level is below the reset water level (water column 90 mm) at 5,
In step 106, the timer built in the control means 28 is reset, and in step 107, the drain pump 16 is turned off to end the drain stroke. In step 108, the process proceeds to the next stroke.

After 50 seconds have elapsed in step 109, the timer is reset in step 110, and the first motor 19 is driven to rotate the rotary drum 1. Step 1
The timer is started again at 12 and the water level is detected again at step 113. If the water level is not below the reset water level at step 114, the rotating drum 1 is rotated until 3 seconds have elapsed at step 115. If the water level is below the reset level, steps 106 to 108 are performed in the same manner as described above, and the process proceeds to the next step.

By rotating the rotary drum 1 for 3 seconds, the clothes in the rotary drum 1 are stirred, and the clothes having a high moisture content and the clothes having a low moisture content are substantially equalized. Step 11
In step 6, the first motor 19 is stopped to stop the rotation of the rotary drum 1, and in step 117, the timer is reset. Until the water level in the water receiving tank 3 falls below the reset water level, the rotary drum 1 is repeatedly stopped for 50 seconds and rotated for 3 seconds.

When the rotating drum 1 is not rotated, clothes having a high water content are unbalanced, and imbalance occurs at the time of dehydration, and vibrations increase, and it takes time to reach a predetermined number of rotations. By stirring the clothes, the clothes having a high moisture content and the clothes having a low water content can be made substantially uniform, and the rotating drum 1 can be started up to a predetermined rotation speed in a short time with little vibration.

As described above, according to the present embodiment, while the rotating drum 1 is driven at predetermined time intervals before the dewatering process is performed,
By driving the drain pump 16, the unevenness of the water contained in the clothes can be eliminated, and the rotating drum 1 can be started up to a predetermined number of revolutions in a short time during dehydration, so that the time can be reduced.

[0063]

As described above, according to the first aspect of the present invention, a water receiving tank elastically supported in the main body of the washing machine, and the water receiving tank is rotatably provided in the water receiving tank. A rotating drum, a motor that drives the rotating drum, a drainage unit that drains water in the water receiving tank, a water level detecting unit that detects a water level in the water receiving tank, the motor, a draining unit, and the like. Control means for controlling the operation, wherein at the end of the washing process, when the amount of change in water level per predetermined time detected by the water level detection means while driving the drainage means is greater than or equal to a first predetermined value Since it is determined that the amount of foam is excessive, it is possible to early detect that a large amount of foam has been generated in the rotating drum, and to take a foam countermeasure in a short time,
Further, predetermined rinsing performance and dehydration performance can be obtained.

According to the second aspect of the present invention, there is provided a notifying means for performing a notifying operation, and when the control means determines that the amount of bubbles is excessive, the notifying means notifies the user that the amount of bubbles is excessive. The user can be notified at an early stage that the detergent has been used incorrectly or the detergent amount has been extremely increased.

According to the third aspect of the present invention, the control means performs the defoaming sequence when it is determined that the amount of foam is excessively large, so that the control means can prevent a large amount of foam from being generated by dehydration. The bubbles can be eliminated by a short defoaming sequence.

According to the fourth aspect of the present invention, the water receiving tank elastically supported in the main body of the washing machine, the rotary drum included in the water receiving tank and rotatably disposed, and A motor for driving a drum, drainage means for draining water in the water receiving tank, a lint recovery filter disposed between the water receiving tank and the drainage means, and detecting a water level in the water receiving tank. Water level detecting means, and a control means for controlling the operation of the motor, the drainage means, etc., wherein the control means, at the end of the washing stroke, the water level per predetermined time detected by the water level detecting means while driving the drainage means When the amount of change is equal to or less than the second predetermined value, it is determined that the drainage capacity is reduced due to the clogging of the lint recovery filter. Lost You can inform a decrease in the drainage capacity to the user before.

According to the fifth aspect of the present invention, the water receiving tank elastically supported in the main body of the washing machine, the rotary drum contained in the water receiving tank and rotatably disposed, and Motor for driving the drum, drainage means for draining water in the water receiving tank, water level detecting means for detecting the water level in the water receiving tank, control means for controlling the operation of the motor, drainage means and the like The control means, while driving the rotary drum every predetermined time before performing the dehydration process, so as to drive the drainage means, to eliminate the bias of clothing with a high moisture content and less clothing, At the time of spin-drying, the rotating drum is started up to a predetermined number of revolutions in a short time, and the time can be reduced.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a washing machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the washing machine.

FIG. 3 is a partially cutaway perspective view of the washing machine.

FIG. 4 is an operation flowchart of a main part of the washing machine.

FIG. 5 is a characteristic diagram showing a change in water level during drainage of the washing machine.

FIG. 6 is an operation flowchart of a main part of a washing machine according to a second embodiment of the present invention;

FIG. 7 is an operation flowchart of a main part of a washing machine according to a third embodiment of the present invention.

FIG. 8 is an operation flowchart of a main part of a washing machine according to a fourth embodiment of the present invention.

FIG. 9 is a characteristic diagram showing a change in water level during drainage of the washing machine.

FIG. 10 is an operation flowchart of a main part of a washing machine according to a fifth embodiment of the present invention.

FIG. 11 is a time chart of the operation of the main part when the washing machine is drained.

FIG. 12 is a sectional view of a conventional washing machine.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 rotating drum 3 water receiving tank 9 washing machine main body 16 drain pump (drain means) 19 first motor (motor) 20 second motor (motor) 24 water level detecting means 28 control means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI D06F 39/08 321 D06F 39/08 321

Claims (5)

[Claims] 1. A water receiving tank elastically supported in a washing machine main body, a rotating drum included in the water receiving tank and rotatably disposed, a motor for driving the rotating drum, and the water receiving tank. Drain means for draining water in the water, water level detecting means for detecting a water level in the water receiving tank, and control means for controlling operations of the motor, the drain means, and the like, wherein the control means terminates the washing process. A washing machine configured to determine that the amount of bubbles is excessive when the amount of change in water level per predetermined time detected by the water level detection means while driving the drainage means is greater than or equal to a first predetermined value. 2. The washing machine according to claim 1, further comprising a notifying unit for performing a notifying operation, wherein the control unit notifies the notifying unit when it is determined that the amount of bubbles is excessive. 3. The washing machine according to claim 1, wherein the control means executes a defoaming sequence when it is determined that the amount of foam is excessive. 4. A water receiving tank elastically supported in a washing machine main body, a rotating drum included in the water receiving tank and rotatably disposed, a motor for driving the rotating drum, and the water receiving tank. Drainage means for draining water in the water, a lint recovery filter disposed between the water receiving tank and the drainage means, a water level detecting means for detecting a water level in the water receiving tank, the motor,
Control means for controlling the operation of the drainage means and the like, wherein at the end of the washing process, the amount of change in water level per predetermined time detected by the water level detection means while driving the drainage means is a second predetermined value. When the value is equal to or less than the value, the washing machine is configured to determine that the drainage capacity is reduced due to clogging of the lint recovery filter. 5. A water receiving tank elastically supported in the washing machine main body, a rotating drum included in the water receiving tank and rotatably disposed, a motor for driving the rotating drum, and the water receiving tank. Drainage means for draining water in the water, water level detection means for detecting the water level in the water receiving tank, and a control means for controlling the operation of the motor, drainage means and the like, the control means, the dehydration process A washing machine in which the drainage means is driven while the rotating drum is driven at predetermined time intervals before performing.