KR20110022495A - Spinning course control method of laundry machine - Google Patents

Abstract

PURPOSE: A dehydrating processing control method of a laundry machine is provided to reduce dehydrating processing time and to reduce noise and vibration of the laundry machine. CONSTITUTION: A control unit senses laundry weight of a drum(S110). The control unit disperses clothes of the drum(S130). The control unit senses eccentricity of the drum(S150). In case the eccentricity quantity is less than reference eccentricity quantity, the control unit performs an excessive area passage stage(S210). The control unit performs an acceleration stage(S230). The control unit performs a clothes distribution stage.

Description

Spinning course control method of laundry machine

The present invention relates to a dehydration stroke control method of a laundry machine.

The washing machine generally includes a washing stroke, a rinsing stroke and a dehydrating stroke. Here, the rotational speed of the drum in the dehydration stroke includes the step of rotating the fastest. Therefore, the noise and vibration is increased in the dehydration stroke, there is a need for a solution to solve this problem.

The present invention provides a control method for solving the above problems.

An object of the present invention as described above includes a dewatering step including an effusion step including an eccentricity detection step and an acceleration step, and in the dehydration administration control method of a washing apparatus in which vibrations of a tub and a drum are separated, the acceleration step When the occurrence of eccentricity in the front of the drum is detected by the dewatering stroke control method of the laundry machine, characterized in that to perform the dispersion step again.

According to this control method, when performing the dehydration stroke, it is possible to reduce the time of the dehydration stroke while reducing the noise and vibration of the washing machine.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. First, an embodiment of a washing apparatus to which a control method according to the present invention can be applied will be described with reference to the drawings, and then the control method will be described.

1 is a partially exploded perspective view of a washing apparatus according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the combination of FIG.

1 and 2, in the washing apparatus, a tub 12 is fixedly supported to a cabinet. The tub 12 includes a tub front 100 constituting the front portion and a tubair 120 constituting the rear portion. The tub front 100 and the tubular 120 are assembled by screws, and form a space in which the drum is accommodated. Tubular 120 has an opening in the rear. The inner circumference of the rear side of the tuber 120 is connected to the outer circumference of the rear gasket 250. The inner circumference of the rear gasket 250 is connected to the tub back 130. Tub back 130 has a through-hole is formed through the rotation axis in the center. The rear gasket 250 is made of a flexible material so that the vibration of the tubback 130 is not transmitted to the tubere 120.

The tubular 120 has a rear surface 128. The rear surface 128, the tub back 130, and the rear gasket 250 of the tubular 120 constitute a rear wall surface of the tub. The rear gasket 250 is connected to the tub back 130 and the tubular 120 so as to be respectively sealed to prevent the wash water from leaking in the tub. The tubback 130 vibrates with the drum when the drum rotates, and is spaced apart from the tubere 120 at a sufficient interval so as not to interfere with the tubere 120. Since the rear gasket 250 is made of a flexible material, the tubback 130 allows relative movement without interfering with the tubular 120. The back gasket 250 may have a pleat 252 that may extend to a sufficient length to allow such relative movement of the tubback 130.

The front portion of the tub front 100 is connected to the foreign matter prevention member 200 for preventing foreign matter from flowing between the tub and the drum. Foreign matter trapping member 200 is made of a flexible material, is fixed to the tub front (100). Foreign matter trapping member 200 may be made of the same material as the rear gasket (250). Foreign matter trapping member 200 is referred to as a front gasket for convenience.

The drum 32 includes a drum front 300, a drum center 320, a drum bag 340, and the like. In addition, ball balancers 310 and 330 are installed at the front and rear portions of the drum, respectively. The drum bag 340 is connected to the spider 350, and the spider 350 is connected to the rotation shaft 351. The drum 32 rotates in the tub 12 by the rotational force transmitted through the rotation shaft 351.

The rotary shaft 351 is directly connected to the motor 170 through the tub back 130. Specifically, the rotor 174 and the rotation shaft 351 of the motor 170 are directly connected. The bearing housing 400 is coupled to the rear surface of the tub back 130. The bearing housing 400 rotatably supports the rotation shaft 351 between the motor 170 and the tub back 130.

The stator 172 is fixed to the bearing housing 400. Then, the rotor 174 is positioned surrounding the stator 172. As described above, the rotor 174 is directly connected to the rotation shaft 351. The motor 170 is an outer rotor type motor and is directly connected to the rotation shaft 351.

The bearing housing 400 is supported through the suspension unit from the cabinet base 600. The suspension unit 180 includes three vertical supports and two inclined supports that are inclinedly supported in the front-rear direction.

The suspension unit 180 may include a first cylinder spring 520, a second cylinder spring 510, a third cylinder spring 500, a first cylinder damper 540, and a second cylinder damper 530. .

The first cylinder spring 520 is connected between the first suspension bracket 450 and the base 600. The second cylinder spring 510 is connected between the second suspension bracket 440 and the base 600.

The third cylinder spring 500 is directly connected between the bearing housing 400 and the base 600.

The first cylinder damper 540 is inclined between the first suspension bracket 450 and the base rear portion, and the second cylinder damper 530 is inclined between the second suspension bracket 440 and the base rear portion. have.

The cylinder springs 520, 510, 500 of the suspension unit 180 may not be connected to the cabinet base 600 in a completely fixed manner but may be connected to allow a certain degree of elastic deformation to allow the drum to move forward and backward and to the left and right. That is, it is elastically supported to allow some degree of rotation in the front and rear and left and right with respect to the support point connected to the base 600.

The vertical installation of the suspension can be configured to elastically dampen the vibration of the drum and the tilted installation can be configured to damp the vibration. That is, the vertically installed in the vibration system including the spring and the damping means serves as the spring and the obliquely installed may act as the damping means.

The tub front 100 and the tubular 120 are fixedly installed in the cabinet 110, and the vibration of the drum 32 is buffered and supported by the suspension unit 180. Substantially, the support structure of the tub 12 and the drum 32 may be separated, and the tub 12 may not be oscillated even when the drum 32 vibrates. In other words, the vibration of the tub 12 and the drum 32 can be referred to as a washing machine separated.

The bearing housing 400 and the suspension brackets are connected by the first weight 431 and the second weight 430.

On the other hand, when the laundry object 1 is accommodated inside the drum 32 and the drum 32 rotates in the washing apparatus according to the above-described embodiment, noise and vibration may be greatly generated depending on the position of the laundry object 1. There is a possibility. For example, when the drum 32 rotates (hereinafter referred to as 'eccentric rotation') in a state in which laundry objects are not evenly distributed in the drum 32, vibration and noise may be greatly generated. In particular, vibration and noise may be a problem when the drum 32 is accelerated at high speed for dewatering.

Therefore, the washing apparatus may be provided with ball balancers (310, 330) to prevent vibration and noise caused by the eccentric rotation of the drum (32). In the present embodiment, the front ball balancer 310 is mounted to the front of the drum, and the rear ball balancer 330 is mounted to the rear of the drum. In order to mount the ball balancer, the front portion of the drum 32 may have a front mounting groove (not shown) recessed to the rear to form a groove, and the rear wall of the drum 32 may be recessed to the front to be formed as a groove. It may have a rear mounting groove.

In this embodiment, the front ball balancer 310 and the rear ball balancer 330 are the same. However, the same ball balancer does not necessarily have to be mounted at the front and rear of the drum.

The ball balancers 310 and 330 have internal spaces to form a path through which the balls 312 and 332 move, respectively. Here, the number of balls accommodated in the inner space, the diameter of the ball is determined in consideration of the amount of eccentricity to be offset, but may consider the vibration characteristics of the washing machine.

In addition, the inner space is filled with oil (not shown). Since the amount and viscosity of the oil to be filled affects the movement of the ball, it is preferable to consider this. That is, the amount and viscosity of the oil can be determined so that the ball of the ball balance has the required movement. In addition, the vibration characteristics of the washing apparatus may be considered.

Specifically, the balls are rotated by the friction force as the drum is rotated. The balls rotate at a different speed than the drum because they are not constrained to the drum when the drum is rotating. However, eccentric laundry can adhere to the drum inner wall and rotate at about the same speed as the drum due to sufficient friction and lift of the drum inner wall. Thus, the rotational speed of the laundry and the rotational speed of the balls are different. As a result, the rotational speed of the laundry becomes faster than the rotational speed of the balls at the relatively low speed of rotation when the drum starts to rotate. Precisely, the rotational angular velocity is fast. In addition, the phase difference between the ball and the laundry, that is, the phase difference with respect to the center of rotation of the drum, is continuously changed.

Then, as the rotational speed of the drum becomes faster, the balls are brought into close contact with the outer circumferential surface of the movement path by centrifugal force. At the same time, the balls are aligned to the position where the laundry and phase difference are approximately 180 degrees. When the rotational speed of the drum is greater than or equal to a predetermined value, the centrifugal force is increased so that the frictional force between the circumferential surface and the balls becomes a predetermined value or more, and the balls rotate with the same rotational speed as the drum. In this case, the balls are rotated at the same speed as the drum while maintaining the position where the phase difference is approximately 180 ° from the laundry. In the present specification, when the balls are rotated with a predetermined position on the drum as described above, it will be referred to as an 'eccentric counterpart' or 'ball balanced'.

Therefore, when the load by the laundry object is biased on one side of the drum 32, the balls inside the ball balancers 310 and 330 can be moved to the eccentric counterpart to reduce the eccentricity.

Hereinafter, a control method of laundry machines having the above configuration will be described. The washing apparatus generally includes a washing stroke, a rinsing stroke, and a dehydrating stroke. In the control method according to the present invention, the dehydrating stroke will be described in detail with reference to the drawings.

Figure 3 is a graph showing the RPM change of the drum over time in the dehydration stroke control method according to the present invention. In the graph of FIG. 3, the horizontal axis represents time, and the vertical axis represents the rotational speed, that is, the RPM change of the drum 32.

Referring to Figure 3, the dehydration administration control method of the present invention includes a large dispersion step (S100) and dehydration step (S200).

Foam dispersing step (S100) is to rotate the drum at a relatively low speed and to evenly distribute the cloth inside, dehydration step (S200) to rotate the drum at a relatively high speed to remove the water of the laundry. However, the podispersion step and the dehydration step are named mainly for their main functions, and the functions in each step are not limited according to the name. For example, in the foaming step, water may be removed from the fabric by the rotation of the drum as well as the foaming.

In the present control method, the dispersion step (S100) includes a wet bubble detection step (S110), a swollen bubble step (S130), and an eccentric detection step (S150), and the dehydration step (S200) includes a transient area passing step (S210) and acceleration. Step S230 is included. Hereinafter, each step will be described in detail.

When the rinsing stroke is finished, the cloth inside the drum 32 is wetted by moisture. When the control unit starts the dehydration stroke, first, the controller detects the quantity of the inside of the drum 32, that is, the amount of the wet bubbles (S110).

The reason for detecting the amount of wet bubble is that the weight of the water-containing cloth is different from the weight of the dry cloth even if the amount of non-wet amount, that is, the amount of dry matter, is detected at the beginning of the washing administration. The detected amount of foam determines the allowable conditions for accelerating the drum 32 in the transient region passing step (S210) to be described later, or decelerates the drum 32 by the eccentric condition in the transient region passing step (S210). It will act as a factor to decide to perform the dispersion step again.

In the present control method, the amount of compressing the inside of the drum 32 is measured when the drum 32 is accelerated at a first rotational speed RPM 1, for example, about 100 to 110 RPM, and the drive speed is decelerated for a predetermined time. . When the drum 32 is decelerated, power generation braking is used. Specifically, the acceleration section rotation amount, the deceleration section rotation amount, and application of the driving motors 40 and 170 to rotate the drum 32 are accelerated. The amount of wet air is detected by using the motor DC power.

On the other hand, after detecting the amount of wet foam, the control unit performs an inflating step to disperse the fabric inside the drum 32 (S130).

The inflating step is to prevent the foams from being concentrated in a specific area inside the drum 32 to increase the eccentricity of the drum 32 by uniformly distributing the foams in the drum 32. This is because when the eccentricity increases, the noise and vibration increase when the RPM of the drum 32 is raised. Specifically, the inflating step is performed until the drum 32 is accelerated in one direction by a predetermined inclination until the rotation speed of the eccentric sensing step described later is reached.

Subsequently, the controller detects the eccentricity of the drum (S150).

If the inside of the drum 32 is not evenly distributed and concentrated in a predetermined area within the drum 32, the amount of eccentricity is increased, which may cause noise and vibration when the RPM of the drum 32 is increased later. Thus, the controller determines whether the drum is accelerated by sensing the eccentric amount of the drum.

Eccentricity detection uses the difference in acceleration when the drum 32 rotates. That is, when the drum rotates according to the degree of eccentricity, there is a difference in acceleration when the drum rotates downward along the gravity and when the drum rotates upward in the opposite direction to the gravity. The controller detects the amount of eccentricity by measuring the acceleration difference by using a speed sensor such as a hall sensor provided in the driving motors 40 and 170. Therefore, in the case of detecting the eccentricity, even if the drum rotates, the inside of the drum does not fall and the state of being attached to the drum must be maintained, and the drum rotates at a rotational speed of approximately 100 to 110 RPM. do.

When the sensed eccentricity of the drum at a predetermined wet amount is equal to or greater than the reference eccentricity, the drum is accelerated at high speed, and the vibration and noise of the drum are significantly increased, making it difficult to accelerate the drum. Therefore, the controller may store the predetermined data in a table form in which the reference eccentricity allowing acceleration according to the amount of the wet bubble is predetermined. Therefore, it is possible to determine whether to accelerate by applying the detected amount of eccentricity and the amount of eccentricity to the table. That is, when the amount of eccentricity according to the detected amount of wet bubble is greater than the reference amount of eccentricity, the eccentric amount is too large to accelerate the drum, and thus the above-described wet bubble detection step, inflated step, and eccentric detection step are repeated.

Meanwhile, as described above, the repeating process of the wet bubble detection step, the inflating step, and the eccentric detection step may be repeated until the detected eccentricity satisfies the reference eccentricity or less. However, when an abnormality occurs in the washing machine or when the fabrics in the drum are extremely agglomerated, the detected eccentricity does not satisfy the reference eccentricity or less, and the wet bubble detection step, the inflating step, and the eccentric detection step may be repeated. . Therefore, preferably, if the drum is not accelerated after the dehydration stroke starts and exceeds a predetermined time, for example, approximately 20 to 30 minutes, the control unit stops the rotation of the drum and informs the user that the dehydration stroke has not been completed normally. do.

When the amount of eccentricity according to the detected wet amount is equal to or less than the reference amount of eccentricity, the acceleration tolerance condition is satisfied, so that the subsequent transient area passing step (S210) is performed.

Here, the transient region may be defined as a predetermined RPM band including one or more resonance frequencies in which resonance occurs according to a system of a washing apparatus. The transient area is an inherent vibration characteristic that occurs when the system of the washing machine is determined. The transient area varies according to the system of the washing machine, for example, has a range of about 200 to 270 RPM in the washing machine according to the first embodiment, and about 200 to 350 RPM for the washing machine according to the second embodiment. It can have a range.

That is, when the rotational speed of the drum 32 passes through the transient region, resonance occurs in the washing apparatus, and the noise and vibration of the washing apparatus are significantly increased. In the washing apparatus, noise and vibration cause discomfort to the user, and further, disturb the acceleration of the drum. Therefore, when passing through the transient region, it is preferable to properly adjust the acceleration slope to keep the noise and vibration to a minimum when accelerating the drum 32.

Following the transient region passing step, the controller performs an acceleration step S230. When passing through the transition zone, the drum 32 is accelerated at a relatively high speed to drain water from the fabric inside the drum. That is, in the acceleration step, the RPM of the drum 32 is raised above a predetermined speed to remove water from the cloth inside the drum 32. However, in the acceleration step, since the RPM of the drum 32 is increased at high speed, noise and vibration of the washing apparatus may be greatly generated. In particular, the noise and vibration are increased in proportion to the amount of eccentricity of the drum 32.

On the other hand, as described above, the washing apparatus to which the control method is applied is provided with a ball balancer (310, 330) to prevent noise and vibration caused by the eccentricity, and included in the ball balancer (310, 330) The balls move to the eccentric counterpart to reduce the amount of eccentricity. However, the balls of the ball balancer are smoothly moved at a low speed rather than a high speed when the drum rotates at a constant speed rather than when the drum is accelerated. Therefore, when the drum 32 is accelerated at a relatively high speed, the balls cannot move to the eccentric counterpart properly. Therefore, in the present control method, the ball may be moved and the ball balancing step may be performed so that the balls may move smoothly to the eccentric counterpart after passing through the transient region.

In this case, the RPM for performing ball balancing is set to be larger than the transient area of the washing apparatus. Ball balancing is advantageous as the RPM of the drum 32 is lower, but if the RPM of the drum 32 is lowered below the transient region again for ball balancing, noise and vibration may occur due to resonance. Therefore, ball balancing is preferably performed at RPM above the transient region. Therefore, ball balancing in the present control method may be performed at, for example, about 350 to 400 RPM (RPM 2).

After performing the ball balancing, the controller is to raise the RPM of the drum 32 to the target RPM to remove the water. In this case, the controller can implement a constant speed rotation for a predetermined time at the target RPM can smoothly withdraw water from the gun.

On the other hand, as described above, the amount of eccentricity of the drum must be equal to or less than the reference eccentricity in order to proceed from the podis dispersion step (S100) to the dehydration step (S200).

If the reference eccentricity is set too large, the vibration and noise increase when passing through the transient region, especially when the target RPM is reached in the dehydration step, the vibration and noise are significantly increased. However, if the reference eccentricity is set too small, noise and vibration can be reduced in the subsequent process, but it may take too much time to move from the podis dispersion step (S100) to the dehydration step (S200). That is, when the reference eccentricity is too small, the detected eccentricity does not satisfy the reference eccentricity or less, and the wet detection step, the inflating step, and the eccentric detection step may be repeated. As a result, the dehydration administration time is increased, which may lead to user dissatisfaction.

Therefore, in the control method according to the present invention, while setting the reference eccentricity relatively high so as to pass through the dispersing step (S100) to the desorption system (S200) in a relatively fast time, further reducing vibration and noise in a subsequent step. I came up with a way to do it.

That is, when the reference eccentricity allowing acceleration in the eccentric detection step (S150) is set relatively high, it is easier to enter the dehydration step (S200) in the dispersing step (S100). As a result, it is possible to shorten the time from the dispersing step (S100) to the dehydration step (S200). Hereinafter, a method of reducing noise and vibration in a subsequent step will be described.

In the laundry machine in which the vibration of the tub and the drum is separated, the drum 32 is connected to the tub bag 130. The tub back 130 is not supported by the tub 12, but is supported by the suspension unit 180 through the bearing housing 400. Accordingly, the tub bag 130 is directly connected to the tub 12 to increase the degree of freedom of the drum 32 as compared to the conventional laundry machine that supports the load of the drum 120, and in particular, the front part of the drum 32. The degree of freedom is increased. Therefore, in the washing apparatus in which the vibration of the tub and the drum is separated, when the laundry is concentrated in the front part of the drum 32, the eccentric (hereinafter referred to as 'drum front eccentric') occurs in front of the drum 32 Negative vibration can be very large. As a result, it is very important to determine whether the eccentricity is located in front of the drum 32 in addition to releasing the laundry or performing eccentric compensation in the case where the vibration of the tub and the drum is separated.

To this end, the washing machine is provided with a vibration sensor to detect the vibration value of the drum by the vibration sensor to determine the location of the eccentricity in the drum (32). That is, in the washing apparatus in which the vibration of the tub and the drum is separated, when the bag inside the drum 32 is driven forward and an eccentricity is generated, the vibration becomes greater than a predetermined value. Therefore, the control unit may determine that an eccentricity has occurred in the front of the drum 32 when it detects a value of the vibration sensor and becomes larger than a predetermined value. Furthermore, since the vibration due to the eccentricity is reduced toward the rear from the center of the drum, the controller can determine the occurrence of the central and rear eccentricity of the drum based on the vibration value.

On the other hand, the vibration sensor may be located in the rear portion of the drum 32, thereby detecting the vibration of the drum (32). In particular, in the washing apparatus in which the vibration of the tub and the drum is separated, the degree of freedom of the front of the drum is increased as described above, so that the noise is increased when vertical vibration and front and rear vibration occur rather than the left and right vibration of the drum. Therefore, when the drum front eccentricity is generated, since the up and down and front and rear vibration values of the drum 32 are increased, the controller can determine whether the drum front eccentricity is generated based on the vibration value and / or the front and rear vibration values. On the other hand, according to the type of vibration sensor provided in the laundry machine, it is possible to detect both the above-mentioned up and down vibrations and front and rear vibrations, or to detect any one of the up and down vibrations and the front and rear vibrations to determine the location of the eccentricity.

On the other hand, the rotational speed (RPM 2) for detecting the vibration in order to determine the location of the eccentric occurrence of the drum is preferably more than the transient region. Since the vibration and noise of the drum may increase due to resonance in the transient region, it is difficult to accurately determine whether the drum is caused by resonance or caused by the eccentric position of the drum when the vibration of the drum increases above a predetermined value. Therefore, the second rotational speed RPM 2 is preferably an RPM over the transient region, for example, about 350 to 400 RPM. In addition, since the eccentric occurrence position of the drum is determined by the vibration sensor, it is preferable that the drum performs constant speed operation for accurate vibration detection. As a result, the vibration value is sensed by the vibration sensor while the drum rotates at a constant speed in the 350 to 400 RPM band outside the transient region, and it is determined that the eccentricity is generated in front of the drum when the predetermined value is moved. When it is determined that eccentricity is generated in front of the drum, the dispersion step (S100) is performed again.

In addition, the front eccentric detection of the drum by the vibration sensor may be performed in the above-described ball balancing (S232) section. As described above, since the rotational speed for performing ball balancing (S232) is approximately 350 to 400 RPM, and the constant speed driving section, it is possible to detect the drum front eccentricity by the vibration sensor.

On the other hand, in the control method according to another embodiment of the present invention, the vibration detection step for determining the eccentric position of the drum described above may be performed in both the eccentric detection step and the acceleration step. That is, in the eccentric sensing step, the eccentricity is sensed and compared with the reference eccentricity allowing the acceleration. Furthermore, the eccentric position of the drum is determined by the vibration value of the drum, and the podispersion step is performed again. Here, if the detected eccentricity is less than or equal to the reference eccentricity, or if the drum front eccentricity occurs, the dispersion process is performed again without going to the dehydration step. On the other hand, the method for determining the eccentric position of the drum in the eccentric detection step is similar to the method for identifying the eccentric position in the acceleration step in the above-described embodiment, and thus repeated description is omitted.

On the other hand, in the control method according to another embodiment of the present invention it is possible to adjust the reference eccentricity that allows acceleration according to the eccentric position of the drum. That is, when the eccentricity occurs in the front, center and rear of the drum, it is possible to determine a different amount of reference eccentricity to allow acceleration according to each position. In this case, the reference eccentricity when the eccentricity occurs in the front of the drum is the smallest, the reference eccentricity when the eccentricity occurs in the rear of the drum is the largest, and the reference eccentricity when the eccentricity occurs in the center of the drum corresponds to approximately an intermediate value. do. Therefore, in the present embodiment, by varying the reference eccentricity in accordance with the eccentric occurrence position of the drum, it becomes possible to further reduce the noise in the subsequent step.

According to the above-described control method, when performing the dehydration stroke, it is possible to reduce the time of the dehydration stroke while reducing the noise and vibration of the washing apparatus.

1 is an exploded perspective view of a washing apparatus to which a control method according to the present invention is applied;

2 is a cross-sectional view of FIG. 1, and

3 is a graph showing a change in the rotational speed of the drum according to the control method of the dehydration stroke according to the present invention.

Claims (18)

In the dewatering administration control method of the laundry machine comprising a dispersion step including an eccentric detection step, and a dehydration step including an acceleration step, the vibration of the tub and drum is separated, When the occurrence of eccentricity is detected in the front of the drum in the acceleration step, the dewatering stroke control method of the laundry machine, characterized in that for performing a dispersion step again. The method of claim 1, Dehydration administration control method of a laundry machine, characterized in that for detecting the vibration of the drum to determine whether the front eccentricity of the drum occurs. The method of claim 2, Dehydration operation control method of the laundry machine, characterized in that for detecting the front and rear direction vibration of the drum to determine whether the front eccentricity of the drum. The method of claim 2, The vibration detection control method of the dehydration operation of the laundry machine, characterized in that carried out at the RPM of the transient area or more. The method of claim 4, wherein The vibration detection method for controlling the dehydration operation of a washing machine, characterized in that the drum is detected when the constant speed operation. The method of claim 4, wherein The vibration detection is carried out in the region of 350 to 400 RPM dehydration administration control method of the laundry machine. In the dewatering administration control method of the laundry machine comprising a dispersion step including an eccentric detection step, and a dewatering step including an acceleration step, the vibration of the tub and drum is separated, When the eccentricity is detected in the front of the drum in the eccentric detection step and the acceleration step, the dewatering stroke control method of the laundry machine, characterized in that for performing a dispersion step again. The method of claim 7, wherein Dehydration administration control method of a laundry machine, characterized in that for determining whether the eccentricity in front of the drum by the vibration of the drum. The method of claim 8, Dehydration operation control method of the laundry machine, characterized in that for detecting the front and rear direction vibration of the drum to determine whether the front eccentricity of the drum. 10. The method of claim 9, The vibration detection method for controlling the dehydration operation of a washing machine, characterized in that the drum is detected when the constant speed operation. In the dewatering administration control method of the laundry machine comprising a dispersion step including an eccentric detection step, and a dewatering step including an acceleration step, the vibration of the tub and drum is separated, Detecting eccentricity in the eccentric detection step, grasps the eccentric position inside the drum to perform the dispersion step according to the detected amount of eccentricity and the eccentric position inside the drum again dehydration administration control method . The method of claim 11, When the detected eccentricity is more than the reference eccentricity, or if the front eccentric occurs in the drum, the dispersion dispersion control method of the laundry machine, characterized in that for performing a dispersion step again. The method of claim 12, Dehydration stroke control method of the laundry machine, characterized in that the occurrence of the front eccentric inside the drum is determined by the front and rear vibration value of the drum. In the dewatering administration control method of the laundry machine comprising a dispersion step including an eccentric detection step, and a dewatering step including an acceleration step, the vibration of the tub and drum is separated, Detecting the eccentricity in the eccentric detection step, by detecting the eccentric position inside the drum to adjust the amount of eccentricity that allows the acceleration according to the eccentric position in the drum, the dehydration administration control method of the laundry machine. The method of claim 14, The eccentric position inside the drum is determined by the vibration value of the front and rear vibration of the drum. The method of claim 15, And a reference eccentricity for allowing acceleration in the case where an eccentricity occurs in front, center and rear of the drum is set separately. The method of claim 16, The reference eccentricity when the eccentricity occurs in the front of the drum is smaller than the reference eccentricity when the eccentricity occurs in the center and the rear portion of the drum. The method according to any one of claims 1 to 17, The washing device, cabinet; A tub fixed to the cabinet; A drive unit including a rotating shaft connected to the drum, a bearing housing rotatably supporting the rotating shaft, and a motor connected to the rotating shaft; A connection member for flexibly connecting the driving unit and the rear opening of the rear of the tub; And And a suspension unit connected to the driving unit to support the buffer.

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