JP3536565B2 - Washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to resiliently support the water receiving rotating freely disposed within the tank to the washing machine body, laundry
The present invention relates to a washing machine for washing, rinsing, and dehydrating laundry in a drum.

[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 drum 1 has a large number of water passage holes 2 provided on the entire outer periphery 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 cover 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 a vibration isolator 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.

The operation of the above configuration will be described.
, The laundry is put into the drum 1 and the operation is started. In the washing process, the drum 1 is driven to rotate at a low speed by the motor 6, and the laundry in the drum 1 is lifted and dropped on the water surface. . Thus, the washing process proceeds. The same operation as the washing process is performed in the rinsing process. In the dehydration process, the drum 1 is driven to rotate at high speed, and the laundry is centrifugally dehydrated. At this time, the laundry in the drum 1 is biased,
That is, when imbalance occurs, the drum 1 and the water receiving tub 3 vibrate, but the vibration is attenuated by the vibration damper 11 and is not transmitted to the washing machine main body 9.

[0006]

In such a conventional configuration, the rotation speed of the drum 1 is about 53 rpm during the washing process.
In the dehydration process, the rotation speed is about 1000 rpm. When the laundry in the drum 1 enters the dehydration process in a tangled state in the washing process, the imbalance occurs because the laundry in the drum 1 is not evenly distributed in the dehydration process. When dehydration is started in an unbalanced state, a large vibration is generated at a rotation speed corresponding to a vibration resonance point of the water receiving tub 3 or the like, and when the vibration of the water receiving tub 3 is large, the vibration hits the washing machine main body 9 and an impact sound is generated. There is a problem that abnormal sound is generated, and further, the rotation speed of the drum 1 cannot be accelerated from the rotation speed corresponding to the vibration resonance point,
There was a problem that predetermined dehydration performance could not be obtained.

Further, even if the rotation speed of the drum 1 can be accelerated from the rotation speed corresponding to the vibration resonance point, when the drum 1 is rotated at a high speed, the laundry in the drum 1 may be unbalanced. Vibration of the water receiving tub 3 and the like becomes large, and this vibration is transmitted to the floor on which the washing machine is installed, and the whole floor vibrates, and this vibration has a problem that loud noise is generated.

The present invention solves the above-mentioned conventional problems. Before starting the spin-drying process, the state of the laundry in the drum is detected to determine whether or not the process can be shifted to the spin-drying process. The purpose is to avoid noise.

[0009]

SUMMARY OF THE INVENTION The present invention, in order to achieve the above object, the washing machine body elastically supported by the drum enclosing the water tub in its washing houses the laundry to the drum
Laundry is lifted by rotation and dropped
The motor can be rotated by the rotation speed detection means.
Speed, and input the signal from the speed detection means.
That Gyosu control by the control unit the rotational speed of the Rutotomoni motor.
The control means corresponds to the vibration resonance point of the drum such as a water receiving tank
Dehydration process driven at a second rotation speed higher than the rotation speed
Before running, and dehydration can be the lower than the second rotational speed
After driving in the fourth speed low KuKatsu washing than the fourth rotation speed
Driving at a third speed at which the rinsing material sticks to the inner wall of the drum
And, Amba of laundry in the drum at a rotation speed variation width when the
Perform the unbalance judgment process to judge the condition of the lance
It is obtained as that.

By driving the drum at a rotational speed capable of dehydrating before the dehydration process, the laundry in the drum is dehydrated and adhered to the inner wall of the drum, and in this state, the laundry is unbalanced. By detecting the presence / absence of the laundry based on the rotation speed fluctuation width at the third rotation speed, it is possible to accurately detect the condition, determine the state of the laundry in the drum, and determine whether to shift to the dehydration process. Can be determined.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, laundry is stored and the laundry is lifted by rotation.
A rotatable drum for washing by dropping, a water tub containing the drum and elastically supported by the main body of the washing machine, a motor for driving the drum, and a rotation of the motor
Rotation number detecting means for detecting the rotation number, and the rotation number detecting means
Control means for inputting a signal from the motor and controlling the number of rotations of the motor, wherein the control means sets the drum based on a number of rotations corresponding to a vibration resonance point of the water receiving tank or the like.
Before performing the dehydration stroke driven at a high second speed ,
After driving at a rotational speed of the second lower than the rotational speed and dewatering possible fourth, the fourth low KuKatsu laundry than the rotational speed of
It is driven at a third rotation speed stuck to the inner wall of the drum, and
Unbalanced signals of the laundry in said drum at a rotation speed variation width when the
An unbalance determination step for determining a state of the drum is performed .
By driving 2 a possible and lower than the dehydration rotation speed fourth in speed, it is possible to stick the laundry in the drum to the inner wall of the drum as well as dewatering, the laundry is tension
With laundry attached , the laundry speed is lower than the fourth
The state of the laundry in the drum is changed at the third rotation speed without changing the state of the laundry stuck to the inner wall of the drum by driving at the third rotation speed stuck to the inner wall of the drum. Runode can determine, it is possible to improve the determination accuracy.

[0012] The invention described in claim 2 is the invention according to the claim 1, the fourth rotation speed was set to the number of rolling Kai have lower than the rotational speed corresponding to the vibration resonance point such as water tub When the laundry in the drum is dehydrated and attached to the inner wall of the drum, no large vibration is generated even when the laundry in the drum is unbalanced, and the drum rotation speed is reduced. Can be started up to the fourth rotation speed, and the laundry can be reliably adhered to the inner wall of the drum.

According to a third aspect of the present invention, laundry is stored.
By lifting the laundry by rotation and dropping it
A rotatable drum for washing
A water receiving tank elastically supported by the rinsing body, and the drum
Motor to be driven and rotation for detecting the number of rotations of the motor
Number detection means, and a signal from the rotation number detection means.
And control means for controlling the number of rotations of the motor.
And the control unit includes the drum in the water receiving tank or the like.
At a second rotation speed higher than the rotation speed corresponding to the vibration resonance point of
Before performing the dehydrating operation for driving, after driving at low KuKatsu dehydration possible fourth rotational speed than the speed corresponding to the vibration resonance point such as the water receiving tank, or lower than the fourth rotational speed
At the third number of revolutions at which the laundry sticks to the inner wall of the drum
The laundry in the drum is driven at the rotation speed fluctuation width at that time.
First unbalance judgment for determining the state of unbalance
A constant stroke, rotation of the low had fifth from coincide with high the second rotational speed than the speed corresponding to the vibration resonance point such as the water tub
After driving by the number, the third driven at a rotational speed, a second unbalance determines <br/> state of imbalance of the laundry in said drum <br/> engine speed fluctuation width when the Execute the judgment process
That way is obtained by, by driving the drum at a fourth rotation speed possible dehydration causes stick to the inner wall of the drum as well as dehydrating the laundry in the drum, by detecting the state of the laundry, It is determined whether or not driving can be performed at a fifth rotation speed higher than the rotation speed corresponding to the vibration resonance point of the water receiving tank or the like.
If it is possible to drive at the rotation speed of 5, the motor is driven at the fifth rotation speed, and then the state of the laundry is detected, so that at the second rotation speed higher than the rotation speed corresponding to the vibration resonance point of the washing machine body or the like. It is possible to determine whether or not it is possible to drive, and it is possible to improve the accuracy of determining whether or not to shift to the dehydration process.

[0014]

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

Embodiment 1 As shown in FIGS. 1 and 2, a first motor (motor)
15 drives the drum 1 at a first rotational speed N1 (for example, 53
rpm) for washing or rinsing, and the second motor (motor) 16
At a rotation speed N2 (for example, 1000 rpm) for dehydration. The first motor 15 and the second motor 16 are constituted by induction motors, and are connected to driven pulleys 19 via belts 17 and 18, respectively.

The driven pulley 19 has two kinds of reduction ratios. The first motor 15 is connected via a belt 17 to a driven pulley 19a having a large reduction ratio.
6 through the belt 18 to the driven pulley 1 having a small reduction ratio
9b, 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 20 includes a first motor 15, a second motor 15,
The motor 16 is controlled as shown in FIG. The control means 21 is constituted by a microcomputer, and includes a heater 13, a first motor 15, a second motor 16, a water supply valve 23, a drain pump 2 through a power switching means 22 constituted by a bidirectional thyristor or the like.
4 and the like, and sequentially controls a series of steps of washing, rinsing, and dehydration. The heater 13 heats the washing water in the water receiving tub 3, the water supply valve 23 supplies water to the water receiving tub 3, and the drainage pump 24 drains the washing water in the water receiving tub 3.

The input setting means 25 is for inputting a required setting course, operation start, and the like by the user, and is input to the control means 21. The display means 26 displays the contents set by the input setting means 25, the operation state, and the like. The water level detecting means 27 detects the water level in the water receiving tank 3, and the water temperature detecting means 28 detects the water temperature in the water receiving tank 3, and inputs the detected temperatures to the control means 21. The rotation speed detecting means 29
The number of rotations of the drum 1 is detected by detecting the number of rotations of the first motor 15, and is input to the control unit 21. The storage means 30 stores data necessary for a series of controls. In addition, 31 is a commercial power supply, and 32 is a power switch.

Before the dehydration process of driving the drum 1 at the second rotation speed N2, the control means 21 performs a cloth loosening process of driving the drum 1 at the first rotation speed N1, as shown in FIG.
From the first rotation speed N1 to the third rotation speed N3 (for example, 1
00 rpm), and a fourth rotation speed N at which dehydration is possible after the cloth balance process.
4 (for example, 200 rpm), and enters the dehydration process through a pre-dehydration process and an unbalance determination process in which the pre-dehydration process is performed at the third rotation speed N3 to detect and determine the imbalance of the laundry. Like that.

The rotation direction of the drum 1 in the cloth loosening process is set opposite to the rotation direction after the cloth balance process, and the third rotation speed N3 is set to the rotation speed at which the laundry sticks to the inner wall of the drum 1. The fourth rotation speed N4 is a rotation speed lower than the rotation speed corresponding to the vibration resonance point of the water receiving tank 3 or the like.
Is driven by the second motor 16.

In the unbalance determination step, first, the rotation speed of the first motor 15 is detected by the rotation speed detecting means 29, and the first motor 15 is controlled to the third rotation speed N3 by this detection output. The first motor 15 is driven with the conduction angle of the power switching means 22 fixed at this time. The state of the laundry in the drum 1 is determined on the basis of the rotation speed fluctuation width of the first motor 15 when driven by the fixed conduction angle. When the rotation speed fluctuation width is large, the laundry in the drum 1 is unbalanced. It is determined to be in the state.

The operation of the above configuration will be described.
Is opened and the laundry is put into the drum 1, and the power switch 3
After turning on the water supply valve 23, the start switch (not shown) of the input setting means 25 is operated to start the operation.
Operates to supply water, and when a predetermined water level is detected by the water level detection means 27, the water supply is stopped and the first motor 15 is driven. In the washing process, the drum 1 is rotated at a first rotation speed by the first motor 15 while replenishing water because the laundry contains water, and the laundry in the drum 1 is lifted and falls on the water surface. Is done.

At this time, the heater 13 is energized to heat the washing water in the water receiving tub 3 and the water temperature in the water receiving tub 3 is detected by the water temperature detecting means 28, so that the temperature of the washing water is substantially constant. To control. When the washing process is completed, the drainage pump 24
Operates to drain the washing water in the water receiving tank 3. afterwards,
In the dehydration step via the rinsing step, the drum 1 is driven to rotate at the second rotation speed, and the laundry is centrifugally dehydrated.

Next, the operation before the washing step or the rinsing step and before the dehydration step is started will be described with reference to FIGS. When the operation is started after the washing process or the rinsing process is completed in step 40 of FIG. 5, a timer built in the control means 21 is started in step 41, and a step 4 is started.
In step 2, the first motor 15 is turned on. At this time, the rotation speed of the drum 1 is set to the first rotation speed N1 (53 rpm), the rotation speed of the first motor 15 is detected by the rotation speed detecting means 29, and the first motor 15 Control. Therefore, the drum 1 is, as shown in FIG.
The cloth rotates at the first rotation speed N1 and the cloth loosening process is started.

At step 43, every predetermined time (for example,
The first motor 15 is turned on and off (8 seconds on, 3 seconds off), and when the time t1 has elapsed in step 44, the cloth balance process starts. At this time, the rotation direction of the drum 1 is opposite to the rotation direction of the drum 1 in the cloth loosening process.

When the time t2 has elapsed in step 45, the rotation speed of the drum 1 is increased at a first increasing speed (for example, 5 rpm per second) in step 46. When the time t3 has elapsed in step 47, the rotation speed of the drum 1 at this time has reached the rotation speed (for example, 83 rpm) stuck to the inner wall of the drum 1 when the amount of laundry in the drum 1 is small.

After the time t3 has elapsed in step 47, the rotational speed of the drum 1 is increased in step 48 to a second rising speed lower than the first rising speed (for example, 2 rpm per second).
And the laundry can be uniformly stuck to the inner wall of the drum 1 even if the amount of the laundry in the drum 1 is the rated capacity. When the time t4 has elapsed in step 49, the rotation speed of the drum 1 at this time should have reached the third rotation speed N3. In step 50, the rotation speed of the drum 1
If the rotation speed N3 has not been reached, the timer is reset in step 51 and the process returns to step 41.

If the rotation speed of the drum 1 has reached the third rotation speed N3 in step 50, the first motor 15 is turned off in step 52, and then a preliminary dewatering process is performed.
In step 3, the second motor 16 is turned on. At this time, the second motor 16 drives the commercial power supply 31 with full conduction. Therefore, the laundry in the drum 1 is dehydrated and can be firmly adhered to the inner wall of the drum 1. Further, the second motor 16 is connected to the first motor 15 via belts 17 and 18, and the drum 1 is driven by the second motor 16.
Is detected by the rotation speed detecting means 29.

When the rotation speed of the drum 1 reaches the fourth rotation speed N4 in step 54, the second motor 1
6 is turned off, and in step 56, the rotation speed of the drum 1 is N4 '.
When the number of rotations reaches 110 rpm, for example, the process returns to step 53 until the predetermined number of times, the second motor 16 is driven with the commercial power supply 31 in full conduction, and the operation up to step 56 is repeated to change the laundry in the drum 1. Is further dehydrated and firmly adhered to the inner wall of the drum 1. Step 5
When the process is repeated a predetermined number of times (for example, three times) in step 7, the preliminary dewatering process is completed.

Thereafter, an unbalance determination process is started. In step 58, the first motor 15 is turned on, and the rotation speed of the drum 1 is set to the third rotation speed N3.
The number of rotations of the first motor 15 is detected by 9 and the detection output controls the first motor 15 to control the number of rotations of the drum 1 to the third number of rotations N3. When the time t5 has elapsed in step 59, the conduction angle of the power switching means 22 when the rotation speed of the drum 1 is controlled to the third rotation speed N3 is detected in step 60, and the conduction angle is fixed at the detected conduction angle. The first motor 15 is driven. Then, in step 61, the rotation speed fluctuation width at this time is detected by the rotation speed detection means 29.

The fluctuation range of the rotational speed detected in step 62 is compared with a predetermined value.
It is determined that the vibration and noise do not increase even in the dehydration process, and after the time t6 has elapsed in step 63, the process proceeds to the next process, that is, the dehydration process in step 64. If the fluctuation range of the rotation speed detected in step 62 is equal to or larger than the predetermined value, it is determined that the vibration and noise increase in the dehydration process, the timer is reset in step 65, and the process returns to step 41. Note that, when performing again, the number of times of driving at the fourth rotation speed N4 in the preliminary dehydration process is one.

As described above, according to the present invention, the laundry in the drum 1 is dehydrated and the inner wall of the drum 1 is dehydrated by driving the drum 1 at the fourth rotational speed N4 at which the drum 1 can be dehydrated before the dehydration process is started. In this state, the state of the laundry in the drum 1 can be determined based on the rotation speed fluctuation width at the third rotation speed N3, and whether the transition to the dehydration process is possible or not can be determined. Can be.

In addition, since the drum 1 is driven a plurality of times at the fourth rotation speed N4, the laundry in the drum 1 can be dehydrated and adhered to the inner wall of the drum 1 at the first time. By driving at the fourth rotation speed N4 a plurality of times after the first rotation, it is possible to further dehydrate and firmly adhere to the inner wall of the drum 1, and to wash the inside of the drum with the rotation speed fluctuation width at the third rotation speed N3. It is possible to improve determination accuracy when determining the state of an object.

In this embodiment, if the rotation speed of the drum 1 has reached the third rotation speed N3 in step 50, the first motor 15 is turned off in step 51, and then the preliminary dehydration process is started. However, the first motor 15 is controlled to control the rotation speed of the drum 1 to the third rotation speed N3, the conduction angle of the power switching means 22 at this time is detected, and the detected conduction angle is fixed. If the first motor 15 is driven to detect the fluctuation range of the rotation speed and to compare it with a predetermined value, the accuracy of determination of the state of the laundry in the drum is further improved. be able to.

Although the first motor 15 and the second motor 16 are constituted by induction motors, they may be commutator motors or the like.

(Embodiment 2) As shown in FIG. 6, the control means 21 in FIG. 3 controls the drum 1 to the first rotation speed N1 before the dehydration process in which the drum 1 is driven at the second rotation speed N2. Cloth loosening process driven by
From the first rotation speed N1 to the third rotation speed N3 (for example, 1
00 rpm), and after the cloth balancing process, the cloth is driven at a fourth rotation speed N4 (for example, 150 rpm) lower than the rotation speed corresponding to the vibration resonance point of the water receiving tank 3 or the like. A first pre-dehydration step,
After the first preliminary dehydration step, a first unbalance determination step that is driven at the third rotation speed N3 to detect and determine the imbalance of the laundry, and after the first unbalance determination step,
A second preliminary spin-drying step driven at a fifth rotational speed N5 (for example, 500 rpm) higher than the rotational frequency corresponding to the vibration resonance point of the water receiving tank 3 and the like; , And enters a dehydration process through a second imbalance determination process which is driven at the rotation speed N3 to detect and determine the imbalance of the laundry. Other configurations are the same as those of the first embodiment.
Is the same as

The operation of the above configuration will be described with reference to FIGS. Note that the operations from step 40 to step 52 are the same as the operations of the first embodiment, and thus the description will be omitted.

In step 66, the first pre-dehydration step is started, and the second motor 16 is driven with full conduction.
And the rotation speed of the drum 1 becomes the fourth rotation speed N4 (150 rpm).
m), the second motor 16 is turned off in step 68, and in step 69, the rotation speed of the drum 1 becomes N3 (100
rpm), the first motor 15 is turned on in step 70, and the process enters a first unbalance determination step. At this time, the rotation speed of the drum 1 is changed to the third rotation speed N3 (100 rpm).
m), the number of revolutions of the first motor 15 is detected by the number of revolutions detecting means 29, and the first motor 15 is controlled by the detection output to control the number of revolutions of the drum 1 to the third number of revolutions N
Control to 3.

When the time t5 has elapsed in step 71, the conduction angle of the power switching means 22 when the rotation speed of the drum 1 is controlled to the third rotation speed N3 is detected in step 72. Fixed to the first motor 1
5 is driven. Then, the rotation speed fluctuation width at this time is detected by the rotation speed detecting means 29.

The rotational speed fluctuation width detected in step 73 is compared with a predetermined value.
It is determined that the imbalance of the laundry in the drum 1 is small, and that the laundry can be driven at a fifth rotation speed higher than the rotation speed corresponding to the vibration resonance point of the water receiving tub 3 or the like.
After 6 has elapsed, the first motor 15 is turned off in step 75, the second motor 16 is driven in full conduction, and the second pre-dehydration step is started. If the rotational speed fluctuation width detected in step 73 is equal to or larger than the predetermined value, it is determined that the motor cannot be driven at the fifth rotational speed higher than the rotational speed corresponding to the vibration resonance point of the water receiving tank 3 or the like. And returns to step 41.

In the second pre-dehydration step, step 77
And the rotation speed of the drum 1 becomes the fifth rotation speed N5 (500 rpm).
m), the second motor 16 is turned off in step 78, and in step 79, the rotation speed of the drum 1 becomes N3 (100
rpm), the first motor 15 is turned on in step 80, and the second unbalance determination process is started. At this time, the rotation speed of the drum 1 is changed to the third rotation speed N3 (100 rpm).
m), the number of revolutions of the first motor 15 is detected by the number of revolutions detecting means 29, and the first motor 15 is controlled by the detection output to control the number of revolutions of the drum 1 to the third number of revolutions N
Control to 3.

When the time t7 has elapsed in step 81, in step 82, the conduction angle of the power switching means 22 when the rotation speed of the drum 1 is controlled to the third rotation speed N3 is detected. Fixed to the first motor 1
5 is driven. Then, the rotation speed fluctuation width at this time is detected by the rotation speed detecting means 29.

The rotational speed fluctuation width detected in step 83 is compared with a predetermined value.
Since it is determined that the imbalance of the laundry in the drum 1 is small and the vibration and noise do not increase even in the dehydration process, after the time t8 has elapsed in step 84, the process proceeds to the next process, that is, the dehydration process in step 85. I do. If the rotational speed fluctuation width detected in step 83 is equal to or larger than the predetermined value, it is determined that vibration and noise increase when entering the dehydration process, and step 8 is performed.
In step 6, the timer is reset, and the process returns to step 41.

As described above, according to the present invention, the drum 1 is driven at the fourth rotation speed N4 lower than the rotation speed corresponding to the vibration resonance point of the water receiving tank 3 or the like before the dehydration process, and then the third rotation is performed.
The state of the laundry in the drum 1 is determined based on the rotation speed fluctuation width at the rotation speed of, and after driving at a fifth rotation speed N5 higher than the rotation speed corresponding to the vibration resonance point of the water receiving tub 3 or the like, Since the state of the laundry in the drum 1 is determined based on the rotation speed fluctuation width at the third rotation speed, the drum 1
Is driven at the fourth rotation speed N4 to dehydrate the laundry in the drum 1 and stick the laundry to the inner wall of the drum 1. By detecting the state of the laundry in this state, the water receiving tub 3 and the like are detected. It is possible to determine whether or not the motor can be driven at a fifth rotational speed higher than the rotational speed corresponding to the vibration resonance point, and if it can be driven at the fifth rotational speed N5, the motor can be driven at the fifth rotational speed N5. By detecting the state of the laundry again, it is possible to determine whether the driving can be performed at the second rotation speed N2 higher than the rotation speed corresponding to the vibration resonance point of the washing machine main body or the like, and to the dehydration process. The accuracy of the determination of whether or not to make a transition can be improved.

(Embodiment 3) When the control means 21 in FIG. 3 determines that the unbalance of the laundry is larger than a predetermined value in the unbalance determination step, the control means 21 changes the on / off time or the number of reversals of the cloth loosening step. When the number of times that the imbalance due to the laundry in the drum 1 is determined to be larger than the predetermined value reaches a predetermined number (for example, three times), the drum 1 is rotated at the second rotation speed. The driving dehydration process is eliminated. Other configurations are the same as those in the first or second embodiment.

The operation of the above arrangement will be described. One of the causes of the imbalance of the laundry in the drum 1 being larger than a predetermined value is that the cloth is not sufficiently loosened in the cloth loosening process. If it is determined in the process that the imbalance of the laundry is greater than a predetermined value, the cloth is sufficiently loosened by changing the on / off time or the number of reversals of the fabric loosening process, and the washing is performed in the fabric balancing process and the preliminary dewatering process. Objects can be evenly stuck to the inner wall of the drum.

When the number of times that the imbalance due to the laundry in the drum 1 is determined to be larger than the predetermined value reaches a predetermined number, it is extremely difficult to attach the laundry to the inner wall of the drum 1 evenly. By judging and eliminating the dehydration process and proceeding to the next process, it is possible to prevent vibration and noise during dehydration due to imbalance of the laundry.

In the dehydration process in which the drum 1 is driven at the second rotation speed, if the laundry in the drum 1 is unbalanced, the rotation speed corresponding to the vibration resonance point of the washing machine body 9 or the like is reduced. Because it is difficult to accelerate to high rpm,
When the rate of increase in the number of revolutions per unit time is less than or equal to a predetermined value,
When it is determined that the laundry in the drum 1 is unbalanced, the laundry is re-balanced by performing the cloth loosening process, and the laundry can be started up to the second rotation speed.

[0049]

As described above, according to the first aspect of the present invention, laundry is stored and the laundry is rotated by rotation.
A rotatable drum for laundry by dropping lifted, the water tub which is resiliently supported in the washing machine main body enclosing the drum, a motor for driving the drum, the
Rotation speed detection means for detecting the rotation speed of the motor;
Control means for inputting a signal from number detection means and controlling the number of rotations of the motor, wherein the control means
The drum corresponds to a vibration resonance point of the water receiving tank or the like.
Execute the dehydration process driven at the second rotation speed higher than the rotation speed
Before, the said a second lower than the rotational speed and possible dehydration
After driving in the fourth speed low Cucamonga than the fourth rotation speed
At the third number of revolutions at which the laundry sticks to the inner wall of the drum
Driven, imbalance determination step determines the state of the imbalance of the laundry in said drum at a rotation speed variation width when the
It is so arranged that the execution, the inner wall of the drum with drum by driving the second rotation and the rotational speed of the dehydrating possible fourth lower than the number, dewatering laundry in the drum before entering the dehydration step This laundry can be stuck to
In the stuck state, the speed is lower than the fourth rotation speed and the laundry is
The state of the laundry in the drum is changed by the rotation speed fluctuation width at the third rotation speed without changing the state of the laundry stuck to the inner wall of the drum by driving at the third rotation speed stuck to the inner wall of the drum. Runode can determine, it is possible to improve the determination accuracy.

[0050] According to the invention described in claim 2, the
Rotational speed of 4, since the the rolling speed than the rotational speed corresponding to the vibration resonance point such as water tub Kai have low, when causing stick to the inner wall of the drum as well as dehydrating the laundry in the drum, the drum Even if the laundry is in an unbalanced state, the drum rotation speed can be raised to the fourth rotation speed without generating a large vibration, and the laundry is securely stuck to the inner wall of the drum. be able to.

According to the third aspect of the present invention, the washing
Store the laundry, lift the laundry by rotation and drop it.
A rotatable drum for washing by
A water receiving tank that contains a storage system and is elastically supported by the main body of the washing machine ;
A motor for driving the drum, and a rotation speed of the motor.
A rotation speed detecting means for detecting the rotation speed;
Inputting a signal and controlling the number of rotations of the motor
Control means, wherein the control means
No. higher than the rotation speed corresponding to the vibration resonance point of the water receiving tank, etc.
Before performing the dehydration step of driving at the second rotational speed, low than the rotational speed corresponding to the vibration resonance point such as the water tub KuKatsu
After being driven at a fourth rotation speed at which dehydration is possible , the fourth rotation
Lower than the number and the laundry sticks to the inner wall of the drum
The drive is performed at the rotation speed of 3, and the drive speed is varied at that time.
The first method for determining the state of imbalance of the laundry in the
And imbalance determination step, after driving at a rotational speed of the low <br/> physician fifth from coincide with high the second rotational speed than the speed corresponding to the vibration resonance point such as the water receiving tank, the third Drive at the number of rotations
And, A laundry in said drum at a rotation speed variation width when the
Second unbalance determination line for determining imbalance state
The drum is driven at a fourth rotational speed capable of dehydrating, and the laundry in the drum is dehydrated and adhered to the inner wall of the drum to detect the state of the laundry. Then, it is determined whether or not it is possible to drive at a fifth rotation speed higher than the rotation speed corresponding to the vibration resonance point of the water receiving tank or the like, and if it can be driven at the fifth rotation speed, it is driven at the fifth rotation speed. After that, by detecting the state of the laundry, it is possible to determine whether or not it is possible to drive at a second rotation speed higher than the rotation speed corresponding to the vibration resonance point of the washing machine main body, etc. It is possible to improve the determination accuracy for determining whether or not the transition is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view of a washing machine according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway rear view of the washing machine.

FIG. 3 is a block circuit diagram of the washing machine.

FIG. 4 is an operation time chart of main parts of the washing machine.

FIG. 5 is an operation flowchart of main parts of the washing machine.

FIG. 6 is an operation time chart 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 the washing machine.

FIG. 8 is a cross-sectional view of a conventional dehydrating and washing machine.

[Explanation of symbols]

1 drum 3 water receiving tank 9 Washing machine body 15 First motor (motor) 16 Second motor (motor) 21 Control means

Continuation of the front page (72) Inventor Yoshikazu Hariji 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-3-86197 (JP, A) JP-A-5-31292 ( JP, A) JP-A-5-293289 (JP, A) JP-A-4-152974 (JP, A) JP-A-5-146580 (JP, A) JP-A-62-292995 (JP, A) 47-38114 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 33/02 D06F 23/02 D06F 37/38

Claims (3)

(57) [Claims] 1. The laundry is stored and the laundry is rotated.
A rotatable drum for laundry by dropping lifted, the water tub which is resiliently supported in the washing machine main body enclosing the drum, a motor for driving the drum, the
Rotation speed detection means for detecting the rotation speed of the motor;
Control means for inputting a signal from number detection means and controlling the number of rotations of the motor, wherein the control means
The drum corresponds to a vibration resonance point of the water receiving tank or the like.
Execute the dehydration process driven at the second rotation speed higher than the rotation speed
Before, the said a second lower than the rotational speed and possible dehydration
After driving in the fourth speed low Cucamonga than the fourth rotation speed
At the third number of revolutions at which the laundry sticks to the inner wall of the drum
Driven, imbalance determination step determines the state of the imbalance of the laundry in said drum at a rotation speed variation width when the
Washing machine to run . 2. A fourth rotation speed, the washing machine according to claim 1, wherein the a number of rolling Kai have lower than the rotational speed corresponding to the vibration resonance point such as water tub. 3. The laundry is stored and the laundry is rotated.
A rotatable door that is washed by lifting and dropping
The ram and the drum are contained and elastically supported by the washing machine body
A water receiving tank, a motor for driving the drum,
Rotation speed detection means for detecting the rotation speed of the motor;
Input the signal from the number detection means and
Control means for controlling the number of rotations, the control means,
The drum corresponds to a vibration resonance point of the water receiving tank or the like.
Execute the dehydration process driven at the second rotation speed higher than the rotation speed
Before, driven by the fourth rotation speed than the rotational speed provides low KuKatsu dehydration corresponding to the vibration resonance point such as the water tub
After that, when the rotation speed is lower than the fourth rotation speed and the laundry
Drive at the third rotation speed stuck to the inner wall of the
The state of imbalance of the laundry in the drum with the number fluctuation range
A first unbalance determination step determines, coincide with high the than the rotational speed corresponding to the vibration resonance point such as the water tub
After driving in the fifth speed have low than the second rotational speed, the <br/> third driven at a rotational speed, the state of unbalance of the laundry in said drum at a rotation speed variation width when the The second to determine
Washing machines, which was to run and unbalanced decision stroke.