JP3423295B2 - Drum type washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substantially horizontal axis.
Drum type washing machine having a drum driven to rotate
More specifically, the outer tank that houses the drum is an elastic body.
Drum type washing machine having a structure held more oscillatably
About. Here, "dehydration" refers to the use of petroleum solvents and the like.
"Drainage" in the used washing is also included. [0002] 2. Description of the Related Art Drum type washing machines store wet laundry.
High-speed rotation of the cylindrical cage-shaped drum around the horizontal axis
To remove the water contained in the laundry by scattering it around
have. A major problem in such centrifugal dehydration
One is that the laundry is unevenly distributed on the inner peripheral wall of the drum.
When the drum is rotated at high speed in a state where
Unbalanced distribution causes abnormal vibration and noise
It is to be. [0003] In order to solve the above problem, the circumference of the drum
Eccentric load by dispersing laundry in a well-balanced manner
Weight reduction method, fixed weight or weight on a part of the drum
A variable weight is provided, and the weight is balanced with the laundry.
Such as a method to reduce the eccentric load
Various proposals have been made regarding the adjustment of the impedance. These subordinates
According to the conventional drum type washing machine, the laundry is moved in the circumferential direction of the drum.
Disperse or concentrate moderately so that the eccentric load of the entire drum
Set the drum rotation speed to a
It can be raised to the speed for cardiac dehydration. [0004] However, these conventional methods
The balance of the drum
The direction, that is, the balance around the rotation axis is taken into account
The extension direction of the rotating shaft, that is, the depth direction of the cylindrical drum
The balance of direction is not taken into account. With a drum type washing machine
The drum is rotated by a rotating shaft fixed to the rear end face.
The cantilever is supported almost horizontally, and its rotation axis is a bearing.
It is rotatably supported by bearings made of the same. That
Therefore, even if the same eccentric load is seen in the circumferential direction,
Eccentric load exists at the front of the drum when viewed in the direction
If there is an eccentric load at the rear of the drum,
The distance from the bearing to the eccentric load is longer than
The load on the bearing when rotating the
It will be good. In addition, the outer tank containing the drum is
If the body is suspended by the body to absorb vibration,
The outer tank oscillates as the core load is located farther from the bearing
Was also found to be large. [0005] The present invention has been developed to solve such a problem.
The purpose of the
Not only the magnitude of the eccentric load seen in the circumferential direction
Considering the position of the eccentric load in the axial direction,
Vibration and noise during rotation can be reduced.
A drum-type washing machine. [0006] Means for Solving the Problems, Embodiments of the Invention, and
According to the present invention, which has been made to solve the above problems,
The drum-type washing machine rotates the shaft using bearings provided in the outer tub.
Supports freely and has a substantially cylindrical peripheral surface at one end of the shaft
And the drum is attached via the shaft.
By rotating at high speed about its central axis,
Drum type for centrifugally dewatering the laundry stored in the ram
In the washing machine,The drum having a substantially cylindrical peripheral surface is
The central axis is inclined downward toward the attachment part side with the shaft body
At the time of dehydration start-up,
After performing the balance adjustment operation, the laundry in the drum
Equilibrium rotation speed such that the centrifugal force acting on the object balances the gravity
Maintain a slightly higher rotation speed than
All the laundry to the inner peripheral wall of the drum by centrifugal force.
A configuration for determining the amount of eccentricity by attaching
Acts on the laundry in the drum as a balance adjustment operation
Than the equilibrium rotation speed at which the centrifugal force
Wash the drum by rotating the drum at a slightly lower rotation speed.
An object is offset in the drum to the side near the attachment part
In order to further disperse in the circumferential direction, control the rotation of the drum.
Perform via the inverter control unitIt is characterized by: [0007] According to the configuration of the drum type washing machine according to the present invention.
If the drum moves toward the attachment side (usually the rear end face)
Because it is arranged so as to be inclined downward, for example,
Stir the laundry in the drum by rotating the drum
Then, the laundry gradually moves along the slope and eventually
Offset to the end face side. Therefore, the drum in this state
The centrifugal force acting on the laundry is proportional to the gravity
Rotation speed (hereinafter referred to as "balanced rotation speed")
The laundry is unevenly distributed around the drum.
Even if there is an eccentric load,
The position of the eccentric load can be on the above attachment part side
Sex is very high. Therefore, this eccentric load and the bearing
Distance is relatively short, and when the drum rotates at high speed, the bearing
Load on the bearing can be relatively small,
Can be reduced. Also, rotate the drum at high speed
Vibration of the drum and the outer tub at the time of this can also be suppressed. In the drum type washing machine according to the present invention,
Due to uneven distribution of laundry around the central axis in the drum
To obtain an index value corresponding to the large eccentric load
It is preferable to provide a configuration including eccentric load detection means.
As one embodiment of this eccentric load detection means, the drum is
Rotate the drum while rotating at a predetermined rotation speed
Based on the torque current component of the current flowing through the driving motor
Thus, the eccentric load can be detected. Sand
If there is an imbalance around the axis of the drum,
Since the load torque fluctuates within one rotation,
Accordingly, the torque current component fluctuates. This variation is due to the eccentric load
Because it corresponds to the size and the position in the drum circumferential direction,
It is possible to obtain the magnitude of the eccentric load, that is, the amount of eccentricity.
it can. If the eccentric load detecting means is provided,
The magnitude of the eccentric load obtained by
By comparing the standard value with the specified value, the rotation speed can be increased further.
Structure to determine whether centrifugal dehydration can be performed
Can be achieved. According to this configuration, during centrifugal dehydration
When the vibration can be assumed to fall within the predetermined tolerance range.
Centrifugal removal
Vibration during water can be reliably suppressed. [0010] In the drum type washing machine according to the present invention,
As described above, even if an eccentric load exists,
The eccentric load is located far from the bearing
The above specified value, which is the standard when permitting centrifugal dehydration,
Can be increased. In other words, the allowable range of the eccentricity
Has traditionally spent a considerable amount of time
The time required to adjust the balance of the laundry
You. [0011] [Embodiment 1] Hereinafter, one embodiment of the present invention (hereinafter referred to as "Example 1")
FIG. 1 illustrates a drum-type washing machine as “Example 1”).
A description will be given with reference to a plane. FIG. 1 shows the entire drum type washing machine of the first embodiment.
FIG. 2 is a side vertical sectional view showing the configuration of the drum type washing machine.
It is a front perspective view. Inside the machine frame 1, an outer tank having a substantially cylindrical peripheral surface is provided.
2 is swingable by four springs 3 and four dampers 4
Is held. The laundry is stored inside the outer tub 2
The drum 5 having a substantially cylindrical shape on the peripheral surface thereof is
Supported. On the front of the machine casing 1, the clothes on the front of the drum 5
A door 7 for opening and closing the class input opening 5a is provided.
The door 7 is opened and the laundry is put into the drum 5.
It has become. A large number of water holes 6 are provided on the peripheral wall of the drum 5.
Are provided in the outer tank 2 during washing and rinsing.
The water flows into the drum 5 through the water holes 6 and
The water discharged from the laundry in the drum 5 during the dehydration is
Scattered to the outer tub 2 side through the water passage hole 6. Also the drum
A baffle 9 is provided on the inner peripheral wall for scraping up the laundry.
Is located at an appropriate position (in this example, about 120 °
At a position where the gap is maintained). The main shaft 8 is supported by a bearing 10 mounted on the outer tub 2.
The main shaft 8 has a large diameter
The main pulley 11 is attached. On the bottom of outer tank 2
The motor 12 is attached, and the rotation axis of the motor 12 is
Has a motor pulley 13 attached thereto.
The rotational power of the main pulley 11 is
Is transmitted to. Water supply pipe connection provided on the back of machine frame 1
A water pipe (not shown) leading to an external water tap is connected to 15.
The water supplied through the water supply pipe is connected to a water supply valve.
16 through the water inlet provided on the back of the outer tub 2
Released into the tank 2. A drain pipe is provided at the bottom of the outer tank 2.
17 is connected and provided in the middle of the drain pipe 17.
When the drainage pump 18 operates, the water is stored in the outer tank 2.
The discharged water is discharged outside through a drain pipe 17. The rotation sensor 19 is provided with the main pulley 11 interposed therebetween.
The light emitting unit installed on the outer tank 2 side and the receiving unit installed on the machine frame 1 side
And an optical unit. Located between the light emitting unit and the light receiving unit
The ring body of the main pulley 11 has one opening on the circumference.
The light emitted from the light emitting unit is provided to the drum 5.
The light passes through the opening only once during one rotation to reach the light receiving unit.
Reach. The light receiving unit detects the drum 5 based on the received light signal.
A rotation pulse signal synchronized with the rotation is generated. In addition, rotation
Even the configuration of the sensor 19 can detect the rotational position of the drum 5
However, the present invention is not limited to this. For example, using a magnetic sensor
To detect the rotational position of the drum 5
No. One of the features of the drum type washing machine according to the present invention.
Is tilted in the direction in which the outer tub 2 containing the drum 5 stands.
It is to be arranged. That is, as shown in FIG.
In addition, the center axis C of the drum 5 is predetermined with respect to the horizontal line H.
The outer tub 2 is attached so as to be inclined by an angle θ.
Such an arrangement is based on the following reasons. FIG. 11 shows that the drum 5 is supported substantially horizontally.
In a conventional general drum type washing machine, the drum 5
Indicates that eccentric load is generated due to uneven distribution of laundry inside
FIG. Conventionally, balance adjustment in drum 5
That is, in FIG. 11 (a) or (b),
Distribution of laundry around the main shaft 8 as viewed from the side, that is, FIG.
Eccentricity caused by distribution of laundry as shown in FIG. 11 (c)
This meant reducing W. However,
Even if there is an eccentric load of the same eccentric amount W,
Where the laundry is distributed on the drum 5
Therefore, when there is an eccentric load at the front of the drum 5 (see FIG.
11 (a)) and an eccentric load is applied to the rear of the drum 5
It may be present (the case of FIG. 11B).
Of course, there may be an eccentric load in the middle
However, only the extremes are assumed here. The drum 5 is mainly used as in the drum type washing machine.
When supported by a bearing 10 that receives the shaft 8, the bearing 10
, A larger load is applied to the drum 5 side. Dora
When there is an eccentric load on the
The greater the separation L, the greater the force to swing the drum 5
Becomes larger. This force is a force that bends the main shaft 8
As shown in FIG.
Then, a larger force is applied to the bearing 10 than in the case of FIG.
Works. The bearing 10 includes a bearing and the like.
However, it is easy to break when subjected to such a large force.
Causes problems such as shortening the service life even if it is not damaged.
You. Furthermore, the outer tub 2 is swung by an elastic body such as a spring or a damper.
When held freely, the force received through bearing 10
Is larger, the swing of the outer tub 2 becomes larger, and the vibration and
May cause noise. For this reason, the eccentricity amount W
In addition to reducing the
Force, an eccentric load on the rear of the drum 5 as shown in FIG.
It is desirable to have weight. Conventional drum type washing as shown in FIG.
The drum 5 is arranged substantially horizontally,
There is no control over the distribution of the laundry in the direction. So
On the other hand, in the drum type washing machine of the first embodiment, the drum 5
Is inclined downward and backward, so that the laundry in the drum 5
Is easy to move to the rear side of the drum 5 by gravity.
You. FIG. 3 shows a centrifuge in the drum type washing machine of the first embodiment.
It is a schematic diagram which shows the distribution state of the laundry at the time of dehydration. drum
5 Do not mix the laundry contained in
When the ram 5 is rotated, as shown in FIG.
The laundry moves rearward in the room 5. as a result,
Even if an eccentric load exists, it is shown in FIG.
As shown in the drawing, the laundry is unevenly distributed around the axis at the rear of the drum 5.
Eccentric load due to the object, the position of which is
The position is close to the ball bearing 10. Thus, this dora
According to the structure of the washing machine, with a very high probability,
The drum 5 where the eccentric load is a desired position as described above
Can be created at the rear. FIG. 4 shows a drum type washing machine according to the first embodiment.
It is a block diagram which shows an electric system structure. Take control of the whole
The control unit 20 performs each washing process such as washing, rinsing, and dehydrating.
A memory in which an operation program to be executed is stored in advance
Is provided. The control unit 20 includes an operation unit 31 and a display unit 3
2, load drive unit 33, inverter control unit 34, motor
The flow detection unit 35 is connected. The operation unit 31 is
Operation by user including operation panel provided on the front
Is input to the control unit 20. The display unit 32
Similarly, it includes a display panel provided on the front of
Controls information related to work and information related to driving conditions
Received from the unit 20 and displayed. The control unit 20 is functionally connected to the rotation speed control unit 2.
1. It includes an eccentric load determination unit 22. Rotation speed control unit
21 sends a rotation speed instruction signal to the inverter control unit 34
The inverter control unit 34 outputs this instruction signal to the PWM signal
And the drive voltage corresponding to this PWM signal is
12 is applied. As a result, the motor 12
Degrees and in the desired direction (right or left), the drum 5
It rotates at a reduced speed at a predetermined reduction ratio. Motor electric
The flow detection unit 35 receives a signal from the inverter control unit 34
The torque current component of the drive current supplied to the
You. The laundry is stretched on the inner peripheral wall of the drum 5 by centrifugal force.
Even at a rotation speed that sticks (that is, above the equilibrium rotation speed)
When the drum 5 is rotating, the circumferential direction of the drum 5
If the laundry is unevenly distributed, the drum 5 rotates once
The load torque fluctuates. Therefore, the torque of the motor current
Current component of the laundry within a period of one rotation of the drum 5.
It fluctuates according to the eccentric load caused by the uneven distribution. FIG. 5 shows the rotation obtained by the rotation sensor 19.
Inversion pulse signal (rotation marker in Fig. 5) and eccentric load
FIG. 9 is a waveform diagram illustrating an example of a change in a torque current component. G
The maximum peak Vmax of the lux current component is one rotation of the drum 5
Appears when the load torque reaches its maximum during the period.
You. Usually, the load torque is applied to the laundry that causes the eccentric load.
When trying to lift above the drum 5 against gravity
Eccentric load passes through the lowest position of the drum 5
It is within the rotation position range from reaching
Sometimes a maximum peak Vmax appears. Conversely, torque
The minimum peak Vmin of the flow component indicates that the eccentric load
Rotational position from passing the highest position to reaching almost right beside
Occurs when within range. Such torque current components
Minute fluctuation amplitude, that is, the difference between the maximum peak value and the minimum peak value
α (= Vmax−Vmin) is the magnitude of the eccentric load
Eccentricity). Therefore, eccentricity and torque
The relationship between the current component fluctuation amplitude α and the
If the criterion is set based on the eccentricity,
Judgment of the magnitude relation of quantity by judgment of fluctuation amplitude
Can be. In FIG. 4, the eccentric load determination unit 22
The waveform shown in FIG.
And receives a rotation pulse signal from the rotation sensor 19.
Take the above-mentioned processing to reduce the eccentricity.
It is determined whether the value is equal to or less than a predetermined value. Next, in the drum type washing machine of the first embodiment,
Dehydration operation performed after the washing operation or rinsing operation
Control (including so-called intermediate dehydration and final dehydration)
Details about the work. Fig. 6 shows the start-up operation of the dehydration process.
It is a flowchart which shows control. When the dewatering process is started, first, the control unit 2
0 activates the drainage pump 18 via the load drive unit 33.
And draining is started (step S11). Then times
The rotation speed control unit 21 is in a mode via an inverter control unit 34.
The drum 12 is driven and the balance adjustment operation is performed.
Balance of centrifugal force and gravity acting on all laundry
Equilibrium rotation speed (in this example, the equilibrium rotation speed is assumed to be 90 rpm).
The drum 5 at a rotation speed slightly lower than
Rotate (step S12). Here, for example, 60
Fluctuate rotation speed in the range of rotation speed of ~ 85 rpm
Shall be. The rotation speed at this time is higher than the equilibrium rotation speed.
Although the laundry is low,
Larger centrifugal force is applied to the laundry on the outer periphery
The laundry works on the inner peripheral wall of the drum 5
And rotates with the rotation of the drum 5, while
The laundry located on the drum 5 rotates without sticking
It is said that it is lifted halfway and then falls
Repeat the operation. In the process of such stirring,
Thus, the laundry is entirely below the inclination of the drum 5, that is, on the rear side.
, And it is moderately dispersed in the circumferential direction. After the balance adjustment operation has been performed for a predetermined time,
And the eccentricity is determined (step S13). sand
That is, the rotation speed control unit 21 is connected via the inverter control unit 34.
And make the rotation speed of the drum 5 slightly higher than the equilibrium rotation speed.
Rotation speed, for example, to 100 rpm,
The rotation speed is maintained (Step S14). At this time,
All the laundry in the ram 5 is centrifugal force
It sticks to the wall surface side and rotates integrally with the drum 5. This state
In this state, the eccentric load determination unit 22
Based on the torque current component detected by the
And the magnitude of the eccentric load occurring at that time,
It is determined whether the amount of eccentricity is equal to or less than a predetermined value (step
S15). In the drum type washing machine of the present embodiment,
The laundry in drum 5 leans to the rear of drum 5
There was an eccentric load due to uneven distribution of laundry around the axis
However, as shown in FIG.
The probability of being the back of 5 is quite high. Therefore, the eccentric load
The separation distance between the weight and the bearing 10 is short, and the eccentricity is somewhat large.
Even if it is difficult, the load on the bearing 10 is relatively small
As well as the vibration of the outer tub 2 and the drum 5
Small enough. Here, the judgment criterion is set at 4 kg.
In step S15, it is determined whether the amount of eccentricity is 4 kg or less.
If the weight is 4 kg or less, the rotation of the drum 5
The speed is rapidly increased to 350 rpm (Step S1)
6). In this washing machine, the unique resonance that the outer tub 2 itself has
The rotation speed (resonance rotation speed) corresponding to the point is about 250 rp.
m. At this resonance rotational speed, the outer tub 2 vibrates greatly.
However, in the above control, the drum 5 is suddenly accelerated.
Since the resonance speed is quickly passed, the drum 5 and the outer tank 2
Can be largely prevented from vibrating due to the resonance action. Uh
Wait for 5 seconds to elapse (step S17).
To the dewatering rotation speed of 800 rpm.
Step S18). And dehydration while maintaining the rotation speed
To complete. On the other hand, in step S15, the amount of eccentricity is 4 kg.
If it is determined that the speed exceeds the
Abnormal vibration and noise occur when the rotation speed is increased
Judge that the possibility is high. Therefore, the above eccentricity
It is determined whether the fixed number of times is the third time (step S1).
9) If the number has not reached three times, return to step S12.
And restart the dehydration startup process. That is, the drum 5
Speed once lower than the equilibrium speed.
By sticking to the inner peripheral wall of the drum 5
Removes the laundry and encourages the laundry to be relocated. Also,
If the number of determinations is the third in step S19,
It is determined that there is an abnormality in the dehydration startup, and the display unit 32
Error display (alert by sound such as buzzer if necessary)
May be performed) (step S20).
Then, a process of stopping the operation is performed (step S21). As described above, the drum type according to the first embodiment
According to the washing machine, due to uneven distribution of the laundry around the axis of the drum 5,
Even if there is an eccentric load, the position is
Is located closer to the bearing 10 in the
The load on 10 can be relatively small.
It is possible to increase the criterion in step S15.
Wear. In other words, the allowable range of the eccentricity is expanded,
The probability of retrying the air conditioning operation is reduced,
In between. Also, an error occurs because dehydration cannot be performed.
Probability is also reduced. Embodiment 2 Next, another embodiment of the present invention.
(Hereinafter referred to as "Example 2").
I will tell. In the drum type washing machine of the second embodiment, the mechanical
Since the structure is the same as that of the first embodiment, the description is omitted.
FIG. 7 shows an electric system configuration of a drum type washing machine according to the second embodiment.
FIG. The basic configuration is the same as in the first embodiment.
The difference is that the control unit 20 is provided with a deceleration position indicating unit 23.
It is to include. Therefore, first, the deceleration position indicating unit 2
Function 3 will be described. As described with reference to FIG.
When an eccentric load exists, the torque current component of the motor current
Causes a fluctuation with a cycle of substantially one rotation of the drum 5, and the fluctuation
The maximum peak is within one rotation period of the drum 5.
This occurs at the timing when the load torque becomes maximum. Through
Normally, the load torque is on the drum 5 against the eccentric load against gravity.
It is maximum when trying to lift to a part. Accordingly
In most cases, the eccentric load passes through the lowest position in the drum 5.
Exists within the rotational position range from passing to reaching almost the side
The maximum peak of the torque current component appears.
Disperse the laundry as evenly as possible around the axis of the drum 5
To avoid eccentric loads, the
It is effective to drop some objects separately. There
Then, the deceleration position indicating unit 23 outputs the fluctuation signal of the torque current component.
The maximum peak is detected from the
A pulse signal is generated at a later timing. At this time
By setting the distance appropriately, the eccentric load is
A pulse signal can be generated when the upper part of the
Wear. This pulse signal is the deceleration instruction signal, and the rotation speed
When receiving the deceleration instruction signal, the control unit 21 temporarily
Control is performed so that the rotation speed of the ram 5 is reduced. In the drum type washing machine according to the second embodiment, the
The basic control during the water stroke is shown in FIG. 6 used in the description of the first embodiment.
Is the same as step S1 in this flowchart.
2 are different in the content of the balance adjustment operation. FIG.
The balance adjustment operation in the drum type washing machine of the second embodiment
4 shows a control flowchart. Hereinafter, along with FIG.
FIG. 9 and FIG.
The balance adjustment operation will be described. FIG. 9 shows in the drum 5
FIG. 1 is a schematic diagram showing the distribution of laundry in the circumferential direction of FIG.
0 indicates the distribution of the laundry in the drum 5 in the axial direction.
FIG. The rotation speed control unit 21 includes the inverter control unit 3
4, the motor 12 is driven, and the rotation speed of the drum 5 is reduced.
A rotation speed slightly higher than the equilibrium rotation speed (for example,
100 rpm) (step S1).
21). When the drum 5 rotates at 100 rpm,
The laundry is pressed against the inner peripheral wall of the drum 5 by centrifugal force.
(See FIG. 9A). At this time,
Eccentric load when the laundry is unevenly distributed around the axis of
Weight, and the torque current component depends on the position of the eccentric load.
Minutes fluctuate. This eccentric load passes right beside the drum 5
While being lifted further up (ie eccentric load
When the weight is above the drum 5), the deceleration position indicating unit 2
3, a deceleration instruction signal is input to the rotation speed control unit 21.
(Step S122). When this signal is input,
Rotation speed so that the rotation speed of
Degree control unit 21 at a predetermined rotation speed (for example, 60 rpm)
A rotation speed instruction signal for rotating the drum 5 is reduced by a predetermined amount.
Output is performed only during the fast time (step S123). Such rapid deceleration is caused by the inner circumference of the drum 5.
Acting on laundry that rotates while pressed against the wall
The purpose is to temporarily reduce the centrifugal force that is
And That is, the stacked laundry is
When the drum 5 reaches the upper part, the drum 5 is decelerated.
Then, the laundry falls by gravity and is dispersed (FIG. 9).
(B)). Centrifugal force acting on each laundry in drum 5
Is proportional to the distance from the rotation axis.
The centrifugal force that acts on the laundry is smaller. others
The centrifugal force acting on all the laundry is superior to gravity
When the drum 5 is decelerated from the state, the overlapping laundry
The laundry that is close to the axis of rotation falls first.
You. Therefore, the predetermined rotation speed and deceleration time are set appropriately.
The speed of the drum 5
Rotate the laundry on the wall while sticking it to the surface
Drop and disperse only the laundry on the rotating shaft side
Can be. After a short deceleration as described above, the drum 5
Is quickly returned to 100 rpm (step
S124). In this case, the eccentric load
The amount of eccentricity is caused by the moderate dispersion of the laundry
Is smaller than before deceleration (see FIG. 9C). In the drum type washing machine of the second embodiment, a certain washing
The rinsing is rotated from the bottom to the top integrally with the drum 5.
When turning, the trajectory of the laundry is indicated by an arrow U in FIG.
It becomes as shown by. On the other hand, this laundry
Centrifugal force is lower than gravity when
When the laundry falls naturally, the falling trajectory of the laundry is indicated by arrow D.
I will become. In other words, this laundry is on the rear side of the drum 5.
At the position moved by the distance m. this
As described above, according to the configuration of the drum type washing machine,
The laundry is moved to the rear side of the drum 5 every time it falls due to such deceleration.
The balance adjustment around the axis is not enough.
Even if the eccentric load remains,
It is located at the rear of the drum 5 with a higher probability. As described above, according to the drum type washing machine of the second embodiment,
If you wash the laundry that is causing the eccentric load,
Since the material can be dispersed, the drum type of Example 1 is used.
Eccentric load has a higher probability of being smaller than a washing machine,
Vibration can be suppressed and the time required for dehydration
Can also be shortened. The above embodiment is merely an example and the present invention
It is clear that modifications and corrections can be made within the spirit of
is there. For example, in the above embodiment, the outer tub 2 is
It is a structure that is suspended and supported swingably by the
The outer tank 2 is mounted on the spring provided in
It may be. Also, the machine frame 1 is set so that the outer tank 2 does not swing.
May be fixed to the structure. Further, in each of the above embodiments, the use of water
The ram-type washing machine has been described.
Those skilled in the art will be able to apply the present invention to dry cleaners.
If there is, it will come easily.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side longitudinal sectional view of a drum type washing machine according to a first embodiment which is one embodiment of the present invention. FIG. 2 is a front perspective view of the drum type washing machine of the first embodiment. FIG. 3 is a schematic diagram showing a distribution state of laundry during centrifugal dehydration in the drum type washing machine of the first embodiment. FIG. 4 is a block diagram showing an electric system configuration of the drum type washing machine of the first embodiment. FIG. 5 is a waveform diagram showing an example of a rotation pulse signal obtained by a rotation sensor and a change in a torque current component due to an eccentric load in the drum type washing machine of the first embodiment. FIG. 6 is a flowchart illustrating control during a start-up operation of a dehydration process in the drum-type washing machine according to the first embodiment. FIG. 7 is a block diagram showing an electric configuration of a drum type washing machine according to Embodiment 2 which is another embodiment of the present invention. FIG. 8 is a control flowchart of a balance adjustment operation of a dehydration process in the drum type washing machine of the second embodiment. FIG. 9 is a schematic diagram showing a distribution state of laundry in a circumferential direction in a drum in the drum type washing machine of the second embodiment. FIG. 10 is a schematic diagram showing the distribution of laundry in the drum in the axial direction in the drum type washing machine of the second embodiment. FIG. 11 is a schematic view showing an example of a state in which an eccentric load is generated in a conventional general drum type washing machine. [Description of Signs] 1 ... Machine frame 2 ... Outer tub 3 ... Spring 4 ... Damper 5 ... Drum 5a ... Clothes opening 7 ... Door 8 ... Main shaft 10 ... Bearing 11 ... Main pulley 12 ... Motor 13 ... Motor pulley 14 ... V belt Reference numeral 15: Water supply pipe connection unit 16: Water supply valve 17 ... Drainage pipe 18 ... Drainage pump 19 ... Rotation sensor 20 ... Control unit 21 ... Rotation speed control unit 22 ... Eccentric load determination unit 23 ... Deceleration position instruction unit 33 ... Load drive unit 34 ... Inverter control unit 35 ... Motor current detection unit

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-86197 (JP, A) JP-A-5-293289 (JP, A) JP-A-64-32893 (JP, A) JP-A-11-111 216296 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) D06F 49/04 D06F 23/06 D06F 33/02

Claims (1)

(57) Claims 1. A shaft body is rotatably supported by a bearing provided in an outer tank, and a drum having a substantially cylindrical peripheral surface is attached to one end of the shaft body. made, the drum washing machine for centrifugally dehydrated the laundry accommodated in the said drum by high speed about its central axis the drum through the shaft body, said drum peripheral surface substantially cylindrical shape Is its center
So that the axis line is inclined downward toward the attachment portion side with the shaft body.
At the start of dehydration, and
After performing the lance adjustment operation, the laundry on the drum
Than the equilibrium speed at which the centrifugal force used balances the gravity
Maintaining a slightly higher rotational speed,
Laundry is attached to the inner peripheral wall of the drum by centrifugal force
The eccentricity is determined.
Acts on the laundry in the drum as an adjustment operation
Slightly faster than the equilibrium speed at which centrifugal force balances gravity
By rotating the drum at a low rotation speed, the laundry
In the drum, it is shifted to a side close to the attachment portion.
The rotation control of the drum is installed so that it is distributed in the circumferential direction.
A drum-type washing machine characterized in that the washing is performed via a barter control unit .