JPH11179088A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make able to judge that the amount of laundry is small by a different judgement standard from an unbalance value at the time of judging the unbalance of the laundry in a drum type washing machine for washing the laundry inside a drum disposed freely rotatably with a horizontal axis as the center. SOLUTION: The drum is included and freely rotatably disposed in a water receiving tank elastically supported inside the washing machine main body, the drum is driven by a first motor 18 and a second motor 19, the operations of the first motor 18 and the second motor 19, etc., are controlled by a control means 24 and the respective processes of washing, rinsing and dehydration are executed. The control means 24 is provided with the process of judging the unbalance of the laundry by the bias of the laundry at the time of starting the dehydration and judges that the amount of the laundry is small when the unbalance value becomes more than a first prescribed value for at least one time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

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

[0003] As shown in the figure, a drum 1 has a large number of water passage holes 2 provided on the entire outer peripheral portion thereof, and is rotatably disposed in a water receiving tank 3. One end of a horizontal shaft 4 is fixed to the rotation center of the drum 1, 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 drum 1 to rotate. A door 8 is provided at the opening of the drum 1 so as to be freely opened and closed.

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 water supply valve 14 is for supplying water to the water receiving tub 3 when washing is easy, and the drainage pump 15 is connected to the water receiving tub 3 with a hose 16 to drain the washing water in the water receiving tub 3. The control device 17 controls operations of the motor 6, the heater 13, the water supply valve 14, the drainage pump 15, and the like, and sequentially controls a series of steps such as washing, rinsing, and dehydration.

The operation of the above construction will be described. When the door 8 is opened, laundry is put into the drum 1 and operation is started, and the drum 1 is rotated at a low speed by the motor 6, the laundry in the drum 1 is lifted. The water is supplied from the water supply valve 14 while continuing this operation. When a predetermined amount of water is supplied, the supply of water is stopped and washing is continued, and the laundry in the drum 1 is lifted and dropped on the water surface. Thus, the washing process proceeds.

The rinsing process includes a rinsing process and an intermediate dewatering process. In the rinsing process, the same operation as in the washing process is performed. In the intermediate dehydration step before the rinsing step, when the laundry in the drum 1 is biased, that is, when imbalance occurs, the drum 1 and the water receiving tub 3 vibrate.
The number of revolutions of the drum 1 is slowly increased, a balance control process for uniformly attaching the laundry to the inner surface of the drum 1 is performed, and then an unbalance determination process for determining the imbalance of the laundry due to the unevenness of the laundry is performed. If the imbalance value is equal to or more than the predetermined value, the balance control process is performed again to correct the imbalance.

If the unbalance value is equal to or less than a predetermined value, the drum 1 is rotated at a high speed, and the laundry is centrifugally dehydrated. At this time, the vibration is damped by the vibration isolating damper 11 to make it difficult to transmit the vibration to the main body 9 of the washing machine. When the number of times of imbalance correction reaches a predetermined number, the process proceeds to the next rinsing step without performing intermediate dehydration. In the dehydration process, the same operation as in the intermediate dehydration process is performed, the imbalance is corrected when the imbalance value is equal to or more than the predetermined value, and if the number of times of imbalance correction reaches the predetermined number, it is determined that start-up cannot be performed. Notify. If the value is equal to or less than the unbalance value, the laundry is centrifugally dehydrated, and the dehydration is completed.

[0008]

In such a conventional structure, when a small amount of laundry is dehydrated, there is not enough amount of laundry to adhere to the entire inner surface of the drum 1, so that the balance control step is performed. Go to drum 1
The unbalance value generated by a small amount of laundry becomes more than a predetermined value as a result, and even if the balance control process is performed a predetermined number of times, the unbalance value is set to a predetermined value. However, there was a problem that dehydration could not be started in the intermediate dehydration or final dehydration process.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is possible to determine that the amount of laundry is small based on another determination criterion from the unbalance value when determining the imbalance of the laundry. Is the first object.

When it is determined that the amount of laundry is small,
A second object of the present invention is to make it possible to start dehydration even if a small amount of laundry causes imbalance, and to proceed without any trouble.

[0011]

According to the present invention, in order to achieve the first object, a drum is contained in a water receiving tank elastically supported in a washing machine body, and is rotatably disposed. The drum is driven by the motor, and the operations of the motor and the like are controlled by the control means to execute the washing, rinsing, and dewatering steps.
The control means has a step of determining the imbalance of the laundry due to the bias of the laundry at the time of dehydration startup, and when the imbalance value reaches at least once, the first predetermined value or more,
The amount of laundry is determined to be small.

Thus, when determining the imbalance of the laundry, it is possible to determine that the amount of the laundry is small based on another determination criterion from the unbalance value.

In order to achieve the second object, the control means changes the predetermined value for determining the imbalance when it is determined that the amount of laundry is smaller than the imbalance value. .

Thus, when the amount of laundry is small,
Even if there is an imbalance due to a small amount of laundry, dehydration can be started by not determining the imbalance, and the process can proceed without any trouble.

[0015]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, there is provided a water receiving tank elastically supported in a washing machine body, a drum contained in the water receiving tank and rotatably disposed. A motor for driving the drum; and control means for controlling operations of the motor and the like to execute washing, rinsing, and dehydration steps. And determining the amount of laundry as a small amount when the unbalance value has reached a first predetermined value or more at least once. In the process of determining the balance, it is possible to determine that the amount of laundry is small based on another criterion from the unbalance value, and the amount of laundry is accurately reduced without providing a process for determining the small amount. Can be determined.

According to a second aspect of the present invention, there is provided a water receiving tank elastically supported in a washing machine main body, a drum included in the water receiving tank and rotatably disposed, and a motor for driving the drum. Control means for controlling the operation of the motor and the like to execute each of washing, rinsing, and dehydration steps, wherein the control means determines the imbalance of the laundry due to the bias of the laundry at the start of dehydration. And the imbalance value is the second
When the number of times of imbalance correction performed when the number of unbalances reaches a predetermined value reaches a predetermined number, the amount of laundry is determined to be small, and when the amount of laundry is small, unbalance is determined. Even if the correction is performed, the unbalance value is less than or equal to the second predetermined value. In this case, the amount of the laundry can be determined to be small based on the number of times the laundry is unbalanced. It is possible to accurately determine that the amount of laundry is small.

According to a third aspect of the present invention, there is provided a water receiving tank elastically supported in a washing machine main body, a drum included in the water receiving tank and rotatably disposed, and a motor for driving the drum. Control means for controlling the operation of the motor and the like to execute each of washing, rinsing, and dehydration steps, wherein the control means determines the imbalance of the laundry due to the bias of the laundry at the start of dehydration. When the unbalance correction number reaches a predetermined number of times when the unbalance value reaches at least once, the first predetermined value or more, and the unbalance value reaches the second predetermined value or more, Since the amount of the laundry is determined to be small, it is possible to accurately determine that the amount of the laundry is small.

The invention described in claim 4 is the above-mentioned claim 1-
In the invention described in Item 3, when the amount of laundry is determined to be small from the unbalance value, the control means changes the predetermined value for determining the unbalance, and the amount of laundry is small. At this time, even if there is an imbalance due to a small amount of laundry, dehydration can be started up by not determining the imbalance, and the process can proceed without any trouble.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, when the control means determines that the amount of the laundry is small from the unbalance value, the control means performs the second dehydration step and the second dehydration step. The number of rotations of the drum is changed to 2, and by changing the number of rotations of the drum in the intermediate dehydration step and the dehydration step, the resonance point of the vibration coming from the structure and the floor can be avoided. Can be reduced.

According to a sixth aspect of the present invention, in the fourth aspect of the present invention, when the control means determines that the amount of the laundry is small based on the unbalance value, the control means performs the second dehydration step and the second dehydration step. When the number of drum rotations reaches 2, the rotation is stopped, and the imbalance determination is performed again. Water is drained from the laundry to reduce the unevenness of the laundry. The probability of raising can be increased.

The invention described in claim 7 is the above-mentioned claim 1
In the invention described in Item 3, the control means, when it is determined that the amount of laundry is small from the unbalance value, eliminates the subsequent intermediate dehydration process. The time required for imbalance correction and the time required for intermediate dehydration performed by determining balance can be reduced.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, the control means changes the rinsing operation time when the amount of laundry is determined to be small from the unbalance value. This can compensate for a decrease in the rinsing rate when the intermediate dehydration is eliminated.

According to a ninth aspect of the present invention, in the above-mentioned seventh aspect, the control means changes the water level of the rinsing when the amount of the laundry is determined to be small from the unbalance value. It is possible to supplement a decrease in the rinsing rate when the intermediate dehydration is eliminated.

According to a tenth aspect of the present invention, there is provided the above-mentioned seventh aspect.
In the invention described in the above, when the amount of laundry is determined to be a small amount from the unbalance value, the control means is configured to change the rinsing operation time and the water level, the rinsing when the intermediate dehydration is eliminated It can compensate for the drop in rates.

[0025]

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. 1 to 3,
The first motor (motor) 18 drives the drum 1 at a low speed N1.
(For example, at 53 r / min) for washing or rinsing. The second motor (motor) 19
In this case, the drum 1 is rotated at a high speed N2 (for example, 1000 r / min) to perform dehydration. The first motor 18 and the second motor 19 are constituted by induction motors, and are connected to driven pulleys 22 via belts 20 and 21, respectively.

The driven pulley 22 has two kinds of reduction ratios. The first motor 18 is connected via a belt 20 to a driven pulley 22a having a large reduction ratio.
9 through a belt 21 to a driven pulley 2 having a small reduction ratio.
2b, and is fixed to the other end of the horizontal shaft 4 having one end fixed to the rotation center of the drum 1.

The control device 23 includes a heater 13, a water supply valve 1,
4, for controlling the drain pump 15, the first motor 18, the second motor 19, and the like, and is configured as shown in FIG. The control means 24 is constituted by a microcomputer, and includes a heater 13, a water supply valve 14, a drainage pump 15, a first motor 18, a second motor 19, and the like via a power switching means 25 constituted by a bidirectional thyristor or the like. , And sequentially controls a series of steps of washing, rinsing, and dewatering.

The input setting means 26 is for inputting a required setting course, operation start, and the like by the user, and is input to the control means 24. The display unit 27 displays the settings made by the input setting unit 26, the operating state, and the like. The water level detecting means 28 detects the water level in the water receiving tank 3.
It is input to the control means 24.

The water level detecting means 28 is connected to the water receiving tank 3, and a magnetic body (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 temperature detecting means 29 is for detecting the water temperature in the water receiving tank 3 and is input to the control means 24. The rotation speed detecting means 30 is built in the first motor 18 and detects the rotation speed of the drum 1 by detecting the rotation speed.
4 is input. The storage means 31 stores data necessary for a series of controls. The notification unit 32 generates a notification sound according to the signal of the control unit 24. 33 is a commercial power supply, and 34 is a power switch.

The control means 24 has a step of judging the imbalance of the laundry due to the unevenness of the laundry at the start of dehydration. Is 13r / min) or more, the amount of laundry is determined to be small. When it is determined that the amount of laundry is small, the intermediate dehydration process thereafter is eliminated. Control means 2
In No. 4, when it is determined that the amount of laundry is small from the unbalance value, the predetermined value for determining the imbalance in a subsequent process is changed.

Here, the process of determining the imbalance of the laundry due to the bias of the laundry at the start of dehydration will be described. The rotation of the drum 1 is reduced by the first motor 18 from the low speed N1 (53 r / min). Slowly starts at a rotation speed (for example, 100 r / min) at which the laundry adheres to the inner surface of the drum 1, performs a balance control process of uniformly attaching the laundry to the inner surface of the drum 1, and then performs the rotation speed (1
00 r / min), the conduction angle of the power switching means 24 is determined, and the fluctuation of the rotation speed of the drum 1 when the operation is fixed at the conduction angle is correlated with the imbalance of the laundry due to the bias of the laundry. Therefore, the imbalance of the laundry is determined.

The operation of the above configuration will be described with reference to FIG. Steps 50 to 52 are intermediate dehydration steps of the rinsing step 1 performed in step 53. In step 50, the control means 24 performs balance control to operate the first motor 18 to gradually increase the rotation speed of the drum 1, and to perform washing. An object is stuck on the drum 1 uniformly. Next, step 5
If the rotation speed fluctuation of the drum 1 due to the unevenness of the laundry stuck in 1 is 3 r / min or less, it is determined that there is no problem due to the imbalance of the laundry even if the drum 1 is rotated at a high speed during spin-drying. The second motor 19 is operated, dehydration is performed for a predetermined time, and the operation is completed. Next, in step 53, rinsing for operating the water supply valve 14 while rotating the drum 1 is performed.

Next, if the fluctuation in the rotation speed of the drum 1 is 3 r / min or more in step 51, the process proceeds to step 54. If the fluctuation in the rotation speed of the drum 1 is 13 r / min or more in step 54, Is determined to be a small amount (referred to as small amount detection), and the routine proceeds to step 53. Drum 1 in step 54
If the rotation speed fluctuation is less than 13 r / min, the routine proceeds to step 56, where the drum 1 is stopped and the balance control is performed again from the beginning to perform the balance control. Unbalance correction is performed up to a predetermined number of times (for example, six times). If the number exceeds the predetermined number, the process proceeds to step 53.

After performing the rinsing in step 53, in step 57, if the small amount is detected in step 55, the control means 24 skips the intermediate dehydration process of steps 58 to 60 and shifts to rinse 2 of step 61. If the small amount is not detected, steps 58 to 60 and steps 62 to 6
As in Step 4, the same operation as in the process of Rinse 1 is performed.

Steps 65 to 68 are final dehydration steps.
If a small amount is detected in the rinsing process, after the balance control is completed in step 65, a predetermined value for determining imbalance in step 71, that is, the rotation speed fluctuation is increased (for example, 10 r / min), and dehydration is performed in step 68 and the process is completed I do.

If a small amount is not detected, an imbalance determination is made in step 67. If the rotation speed fluctuation is 3 r / min or less, final dehydration is performed and the process is terminated. If the rotation speed fluctuation is 3 r / min or more, the process proceeds to step 69, where the drum 1
If the rotation speed fluctuation is equal to or more than 13 r / min, it is determined in step 70 that the amount of laundry is small, and the process proceeds to step 71.

In step 69, the fluctuation in the number of revolutions of the drum 1 is 1
If it is 3 r / min or less, the process proceeds to step 72, where the drum 1 is stopped and the balance control is performed again from the beginning to perform the balance control. Unbalance correction is performed a predetermined number of times (6
Times), and if the number of times exceeds a predetermined number, the process proceeds to step 73, where an abnormality is notified to notify the user.

As described above, according to this embodiment, the control means 2
4 has a step of determining the imbalance of the laundry due to the bias of the laundry at the start of dehydration, and when the unbalance value reaches at least a first predetermined value, the amount of the laundry is reduced by a small amount. In the process of determining the imbalance of the laundry, the amount of the laundry can be determined to be small based on another determination criterion from the unbalance value. It is possible to accurately determine that the amount of the laundry is small without providing the washing machine.

When the amount of the laundry is determined to be small, the intermediate dehydration process thereafter is eliminated, so that the imbalance correction performed by determining that the laundry is unbalanced in the intermediate dehydration process is performed. This time and the time required for intermediate dehydration can be reduced. Also, when the amount of laundry is determined to be small from the unbalance value, the predetermined value for determining the imbalance is changed. Therefore, when the amount of laundry is small, the unbalance is caused by a small amount of laundry. Even if there is, it is possible to start dehydration by not determining the imbalance, and the process can proceed without any trouble.

(Embodiment 2) Control means 24 in FIG.
Has a step of determining the imbalance of the laundry due to the bias of the laundry at the start of dehydration.
When the number of imbalance corrections performed when the number of rotations of the drum 1 reaches or exceeds a predetermined value (3 r / min) reaches a predetermined number (for example, 6 times), the amount of laundry is determined to be small. ing. When the amount of laundry is determined to be small, the rinsing operation time is changed. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. Steps 74 to 76 are intermediate dehydration steps of the rinsing step 1 performed in step 77. In step 74, the control means 24 performs balance control for operating the first motor 18 to gradually increase the rotation speed of the drum 1, An object is stuck on the drum 1 uniformly. Next, step 7
If the change in the number of revolutions of the drum 1 due to the unevenness of the laundry stuck in 5 is 3 r / min or less, the second motor 19 is operated in step 76 to perform dehydration for a predetermined time and to end. Next, in step 77, the water supply valve 1 is rotated while rotating the drum 1.
Rinse to operate 4.

Next, in step 75, if the variation in the number of revolutions of the drum 1 is 3 r / min or more, the process proceeds to step 78, where the drum 1 is stopped, and the imbalance correction for performing the balance control again from the beginning is performed. Unbalance correction is performed up to a predetermined number of times (six times). If the predetermined number is exceeded, step 53
Then, the amount of laundry is determined to be a small amount (a small amount is detected), and the rinsing time is changed to 4 minutes in step 80 to perform rinsing.
This is complemented by changing the rinsing time, as described later, because the rinsing rate becomes worse when the intermediate dehydration is skipped.

In step 81, if the control means 24 first detects a small amount in the previous rinsing step 1, the control means 24 skips the intermediate dehydration step in steps 82 to 83 and proceeds to rinse 2 in step 85, where the small amount is detected. If not, step 8
Rinse 1 as in 2-84 and steps 86-88
The same operation as the step is performed.

Steps 89 to 97 are final dehydration steps.
If a small amount is detected in the rinsing process, after the balance control is completed in step 89, a predetermined value for determining imbalance is determined in step 95, that is, the rotation speed fluctuation is increased (for example, 10 r / min), and the determination is performed. If so, dehydration is performed in step 92 and the processing is terminated.

If there is no small amount detection, an imbalance determination is made in step 91. If the rotation speed fluctuation is 3 r / min or less, final dehydration is performed and the process is terminated. If the rotation speed fluctuation is 3 r / min or more, the process proceeds to step 93, and the imbalance correction is performed up to a predetermined number of times (six times). If the predetermined number is exceeded, the process proceeds to step 94, where the amount of laundry is determined to be small (a small amount is detected),
Proceed to step 95.

In step 95, the fluctuation of the rotation speed of the drum 1 is 1
If it is 0 r / min or less, dehydration is performed in step 92 as described above, and the process is terminated. Rotational speed fluctuation of drum 1 is 10r / mi
If n or more, the process proceeds to step 96, and the imbalance correction is performed up to a predetermined number of times (six times). After a certain number of times,
Proceed to step 97 to inform the user of the abnormality.

As described above, according to this embodiment, the control means 2
No. 4 has a step of determining the imbalance of the laundry due to the bias of the laundry at the time of dehydration startup, and when the unbalance value reaches a second predetermined value (fluctuation in the rotation speed of the drum 1 is 3 r / min) or more. The number of imbalance corrections to be performed
Times), the amount of laundry is determined to be a small amount. Therefore, the number of times of correcting the imbalance of the laundry is determined to be a small amount of the laundry, so that the laundry amount is accurately determined. Can be determined to be small.

When it is determined that the amount of laundry is small,
Since the rinsing operation time is changed, a decrease in the rinsing rate when intermediate dehydration is eliminated can be complemented.

In this embodiment, when the amount of laundry is determined to be small, the rinsing operation time is changed. However, the rinsing water level may be changed. The same operation and effect can be obtained by changing the water level.

(Embodiment 3) The control means 24 in FIG.
Has a step of determining the imbalance of the laundry due to the bias of the laundry at the time of dehydration start-up. The imbalance value is at least once, and the first predetermined value (the rotation speed fluctuation of the drum 1 is 1).
3r / min) or more and the unbalance value reaches a second predetermined value (fluctuation in the rotation speed of the drum 1 is 3r / min) or more.
(6 times), the amount of laundry is determined to be small. Other configurations are the same as those in the first or second embodiment.

The operation of the above configuration will be described with reference to FIG. The operations of steps 74 to 79 and steps 81 to 87 are the same as the operations of the second embodiment, and thus the description is omitted.

Steps 98 to 101 are performed in the final dehydration step, and when a small amount is detected in the rinsing step, step 9 is performed.
After the balance control is completed in step 8, the predetermined value for determining the imbalance in step 102, that is, the fluctuation of the rotation speed is lower than the small amount detection at the time of rinsing (for example, 12 r / min).
If the rotation speed fluctuation of the drum 1 exceeds 12 r / min, it is determined in step 104 that the amount of laundry is small.

If a small amount is not detected, an imbalance determination is made in step 100. If the rotation speed fluctuation is 3 r / min or less, final dehydration is performed and the process is terminated. If the rotation speed fluctuation is 3 r / min or more, the process proceeds to step 103. If the rotation speed fluctuation of the drum 1 exceeds 13 r / min, it is determined in step 104 that the amount of laundry is small, and the process proceeds to step 105. Step 1
In step 101, the predetermined value for determining imbalance, that is, the rotation speed fluctuation is increased (for example, 10 r / min).
To finish the dehydration.

If the fluctuation of the rotation speed of the drum 1 is 12 r / min or less at step 102 and the fluctuation of the rotation speed of the drum 1 is 13 r / min or less at step 103, the process proceeds to step 106.
The drum 1 is stopped and the balance control is performed again from the beginning to perform the balance control. Unbalance correction is performed up to a predetermined number of times (six times). If the number of times exceeds the predetermined number, the process proceeds to step 107, where an abnormality is notified and the user is notified.

As described above, according to the present embodiment, the unbalance value reaches at least one time, the first predetermined value (fluctuation in the number of rotations of the drum 1 is 13 r / min) or more, and the unbalance value is the second value. When the number of imbalance corrections performed when the rotation speed of the drum 1 has reached a predetermined value (3 r / min or more) has reached a predetermined number (six times), the amount of laundry is determined to be small. It is possible to accurately determine that the amount of laundry is small.

(Embodiment 4) The control means 24 in FIG.
When the amount of laundry is determined to be small based on the unbalance value, the rotation speed of the drum 1 is changed to a second rotation speed (for example, 500 r / min) in the intermediate dewatering process and the dewatering process. . Other configurations are the same as those of the first to third embodiments.

The operation of the above configuration will be described with reference to FIG. Steps 108 to 115 are operations in the dehydration step after detecting a small amount in the rinsing step.
Means that after the balance control in step 109, the imbalance is determined in step 110, and the rotation speed fluctuation is 3r / min.
If not, at step 111, the drum 1 is set to the high-speed N2
(1000 r / min) to complete the final dehydration and finish.

If the rotation speed fluctuation is 3 r / min or more, the process proceeds to step 112. If the rotation speed fluctuation is 10 r / min or less, in step 113, the resonance which does not reach the resonance from the floor strength and the product strength is performed. By changing the rotation speed to 2 (500 r / min), the vibration of the washing machine main body 9 is reduced.

In step 112, the rotation speed fluctuation is 10 r / mi.
If n is greater than or equal to n, the routine proceeds to step 114, where the drum 1 is stopped and the balance control is performed again from the beginning to perform the balance control. Unbalance correction is performed a predetermined number of times (6
Times), and if the number of times exceeds a predetermined number, the process proceeds to step 115 to notify the user of the abnormality by notifying it.

As described above, according to this embodiment, when the amount of laundry is determined to be small from the unbalance value, the rotation speed of the drum 1 is changed to the second rotation speed (for example, Since it is changed to 500 r / min), the resonance point of the vibration coming from the structure and the floor can be avoided, and the swing of the washing machine main body can be reduced.

(Embodiment 5) Control means 24 in FIG.
When the amount of laundry is determined to be small from the unbalance value, the rotation is stopped when the second drum rotation speed (500 r / min) is reached in the intermediate dehydration step and the dehydration step, and the unbalance determination is performed again. Like that. Other configurations are the same as those in the first to fourth embodiments.

The operation of the above configuration will be described with reference to FIG. Steps 116 to 125 are operations in the dehydration step after detecting a small amount in the rinsing step.
After balance control in step 117, step 1
In step 119, if the rotational speed fluctuation is 3 r / min or less, the drum 1 is moved to the high speed N2 (1
(000 r / min) to perform the final dehydration and finish.

If the rotation speed fluctuation is 3 r / min or more, the process proceeds to step 120. If the rotation speed fluctuation is 10 r / min or less, in steps 121 and 122, the rotation that does not reach resonance coming from the floor strength and the product strength is performed. After the start-up and dehydration at a speed of 500 r / min, the flow proceeds to step 123 when the rotation speed fluctuates at 10 r / min or more. After stopping, the balance control of step 117 is performed.
Is performed up to a predetermined number of times (six times). If the predetermined number is exceeded, step 12
Proceed to step 4 to notify the user of the abnormality.

As described above, according to the present embodiment, when the amount of laundry is determined to be small based on the unbalance value, the rotation that does not reach resonance coming from the strength of the floor and the strength of the product in the intermediate dewatering process and the dewatering process. By starting up to a few (500 r / min) and dewatering, for example, the weight difference between cotton containing much water and synthetic fiber containing little water is reduced, and imbalance is corrected, and then imbalance correction The drum 1 at high speed N2 (1000r
/ min) for spinning to dehydrate and ensure a dehydration rate.

[0067]

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. Drum, a motor for driving the drum, and control means for controlling the operation of the motor and the like to execute each step of washing, rinsing, and spin-drying. A step of determining the imbalance of the laundry due to the bias; and determining that the amount of the laundry is small when the unbalance value reaches a first predetermined value or more at least once. In the process of determining the imbalance of
It is possible to determine that the amount of laundry is small based on another criterion from the unbalance value, and accurately determine that the amount of laundry is small without providing a process for determining the small amount. Can be.

According to the second aspect of the present invention, the water receiving tank elastically supported in the washing machine main body, the drum contained in the water receiving tank and rotatably disposed, and the drum A motor to be driven, and control means for controlling the operation of the motor and the like to execute each step of washing, rinsing, and spin-drying. When the number of times of imbalance correction performed when the unbalance value has reached the second predetermined value has reached the predetermined number, the amount of laundry is determined to be small. When the amount of the article is small, the imbalance value is rarely less than the second predetermined value even if the imbalance is corrected. Is determined to be small. It can be determined that it is possible, a minor amount of accuracy laundry.

According to the third aspect of the present invention, the water receiving tank elastically supported in the washing machine main body, the drum contained in the water receiving tank and rotatably disposed, and the drum A motor to be driven, and control means for controlling the operation of the motor and the like to execute each step of washing, rinsing, and spin-drying. And the number of times of imbalance correction performed when the unbalance value reaches at least a first predetermined value and the unbalance value reaches a second predetermined value or more reaches a predetermined number of times. When
Since the amount of laundry is determined to be small, it is possible to accurately determine that the amount of laundry is small.

According to the fourth aspect of the present invention, when the control means determines that the amount of laundry is small from the unbalance value, the control means changes the predetermined value for determining the imbalance. When the amount of laundry is small, even if there is an imbalance due to a small amount of laundry, the dehydration can be started by not determining that the laundry is unbalanced, and the process can proceed without any trouble.

According to the fifth aspect of the present invention, when the control means determines that the amount of laundry is small from the imbalance value, the control means performs the second dehydration step and the second dehydration step.
Since the number of rotations of the drum was changed to that of
The resonance point of the vibration coming from the structure and the floor can be avoided, and the shaking of the main body of the washing machine can be reduced.

According to the invention, when the control means determines that the amount of the laundry is small from the unbalance value, the control means performs the second dehydration step and the second dehydration step.
When the rotation speed of the drum is reached, the rotation is stopped and the imbalance determination is performed again, so that the water is drained from the laundry, the unevenness of the laundry is reduced, and the probability of rising to the first drum rotation speed is increased. be able to.

According to the seventh aspect of the present invention, when the control means determines that the amount of laundry is small from the unbalance value, it eliminates the intermediate dehydration process thereafter. It is possible to reduce the time required for the imbalance correction performed by determining that the laundry is unbalanced in the dehydration process and the time required for the intermediate dehydration.

According to the eighth aspect of the present invention, when the control means determines that the amount of laundry is small based on the unbalance value, the control section changes the rinsing operation time. It is possible to compensate for a decrease in the rinsing rate when it is lost.

According to the ninth aspect of the present invention, when the control means determines that the amount of laundry is small from the unbalance value, the control means changes the rinsing water level, thereby eliminating intermediate dehydration. It is possible to supplement the decrease in the rinsing rate when performing.

According to the tenth aspect of the present invention,
The control means changes the rinsing operation time and the water level when the amount of the laundry is determined to be small from the unbalance value, so that the decrease in the rinsing rate when the intermediate dehydration is eliminated can be complemented. it can.

[Brief description of the drawings]

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

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

FIG. 3 is a partially cutaway rear view of the drum type washing machine.

FIG. 4 is an operation flowchart of the drum type washing machine.

FIG. 5 is an operation flowchart of a drum type washing machine according to a second embodiment of the present invention.

FIG. 6 is an operation flowchart of a drum type washing machine according to a third embodiment of the present invention.

FIG. 7 is an operation flowchart of a drum type washing machine according to a fourth embodiment of the present invention.

FIG. 8 is an operation flowchart of a drum type washing machine according to a fifth embodiment of the present invention.

FIG. 9 is a sectional view of a conventional drum type washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drum 3 Water receiving tank 9 Washing machine main body 18 1st motor (motor) 19 2nd motor (motor) 24 Control means

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Wataru Uchiyama 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (10)

[Claims] 1. A water receiving tank elastically supported in a washing machine main body, a drum included in the water receiving tank and rotatably disposed, a motor for driving the drum, and operations of the motor and the like. Control means for controlling and executing washing, rinsing, and dehydration steps, wherein the control means has a step of determining the imbalance of the laundry due to the bias of the laundry at the start of dehydration, A drum-type washing machine configured to determine that the amount of laundry is small when at least once reaches a first predetermined value or more. 2. A water receiving tank elastically supported in a washing machine main body, a drum included in the water receiving tank and rotatably disposed, a motor for driving the drum, and operations of the motor and the like. Control means for controlling and executing washing, rinsing, and dehydration steps, wherein the control means has a step of determining the imbalance of the laundry due to the bias of the laundry at the start of dehydration, When the number of imbalance corrections performed when the number of times reaches a second predetermined value or more reaches a predetermined number of times,
A drum type washing machine in which the amount of laundry is determined to be small. 3. A water receiving tank elastically supported in the washing machine main body, a drum included in the water receiving tank and rotatably disposed, a motor for driving the drum, and operations of the motor and the like. Control means for controlling and executing washing, rinsing, and dehydration steps, wherein the control means has a step of determining the imbalance of the laundry due to the bias of the laundry at the start of dehydration, When the number of times of imbalance correction reaches a predetermined number of times when the unbalance value reaches a first predetermined value or more and the unbalance value reaches a second predetermined value or more, it is determined that the amount of laundry is small. A drum-type washing machine designed to be used. 4. The control device according to claim 1, wherein the control means changes a predetermined value for determining the unbalance when the amount of the laundry is determined to be small from the unbalance value. Drum type washing machine. 5. The drum according to claim 4, wherein when the control means determines that the amount of laundry is small based on the unbalance value, the control unit changes the rotation speed to the second drum speed in the intermediate dewatering step and the dewatering step. Type washing machine. 6. The control means, when determining that the amount of laundry is small from the unbalance value, stops the rotation when the second drum rotation speed is reached in the intermediate dehydration step and the dehydration step, and again determines the unbalance. 5. The drum type washing machine according to claim 4, wherein the washing is performed. 7. The drum according to claim 1, wherein the control means, when judging that the amount of the laundry is small from the unbalance value, eliminates the intermediate dewatering process thereafter. Type washing machine. 8. The drum type washing machine according to claim 7, wherein the control means changes the rinsing operation time when the amount of laundry is determined to be small from the unbalance value. 9. The drum type washing machine according to claim 7, wherein the control means changes the water level of the rinsing when the amount of the laundry is determined to be small from the unbalance value. 10. The drum type washing machine according to claim 7, wherein the control means changes the rinsing operation time and the water level when the amount of the laundry is determined to be small from the unbalance value.