KR101888954B1 - Dehydration control method for washing machine - Google Patents

Abstract

In the method of controlling the dewatering of a washing machine of the present invention, the inner tank is accelerated in a state where the water level in the outer tank is a predetermined set water level, and the washing water passes through the resonance point and is drained during passage through the resonance point. The generated vibration amount can be reduced.

Description

TECHNICAL FIELD [0001] The present invention relates to a dehydration control method for a washing machine,

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

Generally, a washing machine is a device for removing contamination from clothing, bedding, etc. (hereinafter referred to as "foam") by using water, detergent, and mechanical action. In the washing tub, And the laundry introduced into the inner tank is washed.

Such a washing machine includes a washing machine which removes contaminants from a capsule using a detergent, a rinsing device which removes the detergent from the capsule by applying washing water to the laundry, and a dehydrating device which dehydrates the capsule by rotating the inner tank at a high speed after the washing or rinsing . At the time of dewatering, the inner tank rotates at a high speed, and a considerable amount of vibration is generated. In particular, since the inner tank accelerates to a speed equal to or higher than the resonance point during dewatering, it is necessary to appropriately control the vibration occurring near the resonance point.

In addition, when dewatering is performed after washing, bubbles are generated by the detergent remaining in the washing water, and the process of rinsing the foam again to remove bubbles has to be repeated.

The object of the present invention is to provide a dehydration control method of a washing machine which can reduce a vibration occurring when passing through the resonance point by lowering a resonance point through which the tub is accelerated during dehydration.

Another object of the present invention is to provide a dehydration control method of a washing machine capable of preventing foam from being generated during dehydration.

A method of controlling a dewatering machine of a washing machine according to the present invention is characterized in that dewatering is carried out in which the inner tank is rotated at a predetermined speed in a state in which the water level in the outer tank is a predetermined set water level and the washing water in the outer tank is drained, Accelerated rotation passes through the resonance point.

Alternatively, the method for controlling the dewatering of the washing machine of the present invention comprises the steps of (a) draining wash water in the outer tank; (B) stopping the drainage when the level in the outer tank reaches the airflow; (C) injecting washing water into the inner tank and rotating the inner tank at a first speed (a rate sensing rate) lower than the first resonance point; And (d) stopping the spraying of the washing water and performing drainage when the water level in the outer tank reaches a set water level, and operating the inner tank at a higher speed than the first speed.

The dewatering control method of the washing machine of the present invention has the effect of reducing vibration and noise generated when passing through the resonance point.

The dewatering control method of the washing machine of the present invention is capable of passing the resonance point at a relatively low speed compared with the conventional method of accelerating the inner tank after draining all the water in the inner tank even if the same amount of dewatering water is dewatered .

Further, the dewatering control method of the washing machine of the present invention has an effect of reducing the generation of bubbles.

1 is a side sectional view of a washing machine according to an embodiment of the present invention.
FIG. 2 is a perspective view of a portion of the washing machine shown in FIG. 1. FIG.
FIG. 3 is a block diagram showing the control relationship between the main components of the washing machine shown in FIG. 1. FIG.
FIG. 4 shows a method of controlling the dewatering of the washing machine according to the first embodiment of the present invention.
FIG. 5 illustrates a method of controlling the dewatering of a washing machine according to a second embodiment of the present invention.
6 shows a method of controlling the dewatering of the washing machine according to the third embodiment of the present invention.
FIG. 7 illustrates a method of controlling the dewatering of a washing machine according to a fourth embodiment of the present invention.
FIG. 8 illustrates a method of controlling the dewatering of the washing machine according to the fifth embodiment of the present invention.
9 shows a method of controlling the dewatering of a washing machine according to a sixth embodiment of the present invention.
FIG. 10 illustrates a method of controlling the dewatering of a washing machine according to a seventh embodiment of the present invention.

1 is a side sectional view of a washing machine according to an embodiment of the present invention. FIG. 2 is a perspective view of a portion of the washing machine shown in FIG. 1. FIG. FIG. 3 is a block diagram showing the control relationship between the main components of the washing machine shown in FIG. 1. FIG.

1 to 3, a washing machine 100 according to an embodiment of the present invention includes casings 2 and 3, an outer tub 4 suspended in casings 2 and 3 by a suspension 15, And an inner tank (6) rotatably provided in the outer tank (4).

The casings 2 and 3 are formed so as to open on the upper and lower surfaces thereof and include a cabinet 2 constituting a side surface of the washing machine and a top cover 3 connected to one end of the suspension 15 covering the open top surface of the cabinet 2 ). The top cover 3 is provided with a pod entrance and exit hole for allowing the pod to enter and exit, and a door for opening and closing the pod entrance and exit hole is rotatably provided on the top cover 3. Further, the top cover 3 is provided with a detergent box 32 for receiving the detergent.

The control panel 7 may include an input unit for receiving various control commands from a user and a display unit for displaying an operating state of the washing machine 100.

The washing water supplied from an external water source such as a faucet flows along the water supply flow passage 11 and is supplied into the inner tank 6 via the detergent box 32 or is supplied to the inner tank 6 ). ≪ / RTI > For this purpose, the water supply flow path 11 may be constituted by a plurality of flow paths including a flow path for guiding the washing water to the side of the detergent box 32 and a flow path for guiding to the spray nozzle 33 side. In this case, And a flow path switching device for selectively supplying the flow path switching device. A plurality of water supply valves 12 are provided on the water supply flow passage 11 for switching the flow of the fluid and the operations of the respective water supply valves 12 are controlled by the control of the controller 51, And the washing water is supplied to the spray nozzle 33 side or the spray nozzle 33 side.

The jetting section 57 injects washing water into the inner tank 6 and includes a water supply valve 12 and an injection nozzle 33. The water supply valve 12 is controlled by the control of the control section 51, The injection of water is controlled.

A balancer 14 for compensating the eccentricity of the inner tank 6 may be provided on the inner tank 6 at its upper end. The balancer 14 is annularly formed around the inner tank 6 and filled with a fluid or a mass so that the fluid or mass moves in accordance with eccentric rotation of the inner tank 6 to compensate for the eccentricity.

The driving unit 56 provides a driving force for rotating the inner tub 6 or the pulsator 9 and includes a rotary shaft selectively meshed with the inner tub 6 or the pulsator 9 in this embodiment, An outer rotor type induction motor including an inductor stator and a rotor which is a rotor provided to rotate together with the rotation shaft in accordance with a magnetic force induced between the stator and the stator, ) As an example.

The water level sensing unit 52 senses the water level of the wash water so that the water level of the wash water in the outer tank 4 is detected. It is obvious that the level detected by the level detecting unit 52 reflects the level in the inner tank 6 as well.

The eccentricity sensing unit 53 senses the unbalance of the inner tank 6. The eccentricity sensing portion 53 can sense the amount of eccentricity based on the rotational speed variation amount of the driving portion 56 that varies depending on the distribution state of the bubble in the inner tank 6. [ For this, the speed sensing unit for sensing the rotational speed of the driving unit 56 may be provided separately from the driving unit 56. Alternatively, the speed sensing unit may be provided separately from the driving unit 56 using a current sensing unit such as an encoder, It is also possible to measure the output current value of the output shaft 56 and to detect the eccentric amount based on the change of the output current value.

The amount detection unit 54 is for sensing the amount of the bubble charged into the inner tank 6 and is configured to detect the driving characteristics of the driving unit 56 that varies depending on the amount of discharged wastes, It is possible to detect the discharge amount based on the acceleration slope or speed increase amount of the time, the deceleration slope or the speed decrease amount of the braking, and the time taken until the braking.

The vibration sensing unit 55 is for sensing the vibration generated when the inner tank 6 rotates and is provided separately from the eccentric sensing unit 53. [ The vibration sensing unit 55 can sense the amount of vibration based on the displacement or vibration period of the mass which moves according to the vibration generated when the inner tank 6 rotates.

The drainage section 20 includes drainage passages 21 and 25 communicated with the outer tub 4, a drain valve 22 for interrupting the drainage passages 21 and 25, And a drain pump 24. Here, the drain valve 22 is not necessarily provided, and it is also possible for the drainage flow paths 21 and 25 to be interrupted by the drainage pump 24 itself. In this case, the drainage passages 21 and 25 are opened when the drain pump 24 is operated, and shut off when the operation is stopped.

2, the washing water sprayed through the spray nozzle 33 forms a thin water film S. The boundary P where the water film S meets the inner tank 6 is connected to the side wall 6 of the inner tank 6, From the bottom to the bottom. In this case, the spraying area of the washing water is widened so that more can be wetted.

The dewatering control methods exemplified throughout the specification are not limited to the dewatering process but are generally referred to as intermittent dewatering or simple dewatering. In the course of rotating the inner tank 6 at a high speed in order to dehydrate the fabric during the washing or rinsing cycle It is stated that it can be applied.

In the embodiments described below, dehydration entering is performed while rotating the inner tank 6 at a predetermined speed while the water level in the outer tank 4 is lower than a predetermined set water level, And controlling the water to pass through the resonance point while accelerating the inner tank 6 while draining the water.

FIG. 4 shows a method of controlling the dewatering of the washing machine according to the first embodiment of the present invention.

Referring to FIG. 4, the method for controlling the dewatering of the washing machine according to the first embodiment of the present invention includes the steps of driving the inner tank 6 at a first speed V1 while draining the laundry in the inner tank 6 (S1). The first speed V1 is a speed equal to or lower than the resonance point while the inner volume 6 can be sensed by the volume sensing unit 54 while the inner tank 6 is operating at the first speed V1, V2, V3, V4, and V5 at the time of the internal tank 6 operation can be set in accordance with the detection value of the controller 54. [

When the water level detected by the water level sensing unit 52 reaches a predetermined set water level while the inner tank 6 is operated at the first speed V1, the controller 51 controls the inner tank 6, The second speed V2, the third speed V3, the fourth speed V4 and the fifth speed V5 in steps S2 to S7.

Since the amount of the washing water corresponding to the set water level remains in the outer tub 4 at the time when the speed of the inner tank 6 is accelerated from the first speed V1 to the second speed V2, The total weight of the inner tank 6 including the first speed operation S1 is increased compared to the airworthiness, and thus the resonance point that comes after the first speed operation S1 can be lowered. This means that the amount of vibration generated when passing through the resonance point can be reduced.

Throughout the following description, a first resonance point, which is the first resonance point that comes after the first speed (V1) operation, is formed between the second speed (V2) and the third speed (V3), and the second resonance point is the third speed V3 and the fourth speed V4 and the third resonance point is formed between the fourth speed V4 and the fifth speed V5. The inner tank 6, which passes through the respective resonance points, It is of course possible to accelerate the speed of the inner tank 6 from the first speed V1 to the third speed V3 in order to pass the first resonance point, ), The rotational speed of the inner tub 6 is directly set to the third speed V3 after the first speed V1 operation in order to show that the speed of the inner tank 6 may increase stepwise It is not accelerated but accelerates stepwise through a section that operates at a second speed (V2) lower than the first resonance point And a lift.

On the other hand, when the inner tank 6 is continuously rotated in one direction in the state where the washing water is filled in the inner tank 6 (for example, when the water level of the inner tank 6 is the set water level) 4 and the inner tank 6 so as to be poured into the inner tank 6 again. This water flow is formed by the centrifugal force due to the rotation of the inner tank 6 and the water flow poured into the inner tank 6 forms a circulating flow which flows to the outer tank 4 through the through holes formed in the inner tank 6, It is defined as centrifugal circulation throughout the specification. A guide portion 14 is provided at the upper end of the outer tank 4 so as to convert the direction of the water flow raised between the outer tank 4 and the inner tank 6 toward the inner tank 6 so that centrifugal circulation flow can be smoothly formed .

It is preferable that the set water level is set at a speed at which centrifugal circulation water is not generated when the inner tank 6 is rotated at the first speed V1 or more. The speed at which the centrifugal circulation flow is formed can be determined on the basis of the centrifugal force, the water level, the rotational speed of the inner tank 6, and the like, and the rotational speed of the inner tank 6 is accelerated from the first speed V1 to the second speed V2 Since the time taken for the internal tank 6 to operate is very small compared to the time for which the internal tank 6 is operated at the second speed V2, the set water level should be considered such that centrifugal circulation water is not formed during operation of the internal tank 6 at the second speed V2 Particularly, in order to maximize the total load of the inner tank 6 within a range in which the centrifugal circulation flow is not formed, the set water level is set such that the inner tank 6 is operated at the second speed V2, It is preferable to set the maximum value within a range where the film is not formed.

Particularly when considering that the rotational speed of the inner tank 6 passes through the first resonance point in the section S3 in which the rotational speed of the inner tank 6 is accelerated from the second speed V2 to the third speed V3, 6), it is necessary to secure sufficient centrifugal force to disperse the bag in the S3 section. Therefore, in order to maximize the dispersion of the bubble due to the centrifugal force and also to maximize the total load (including the load of the washing water and the washing water) of the inner tank 6 at the time of passing through the first resonance point, In addition, it is preferable that the set water level has a maximum value within a range in which centrifugal circulation flow is not formed in the S3 section.

After S3, the inner tank 6 is operated at the third speed V3 (S4), the rotating speed is gradually accelerated from the third speed V3, and the second speed (V5), and the internal tank 6 is braked after operating at the fifth speed V5 for a predetermined time (S5 to S7).

When the vibration sensed by the vibration sensing unit 55 is detected to be equal to or greater than a predetermined value, that is, when excessive vibration is sensed in the section S3 passing the first resonance point, the control unit 51 controls the operation of the inner tank 6 Is stopped. In this section, a considerable amount of water is still present in the bottle, and the dehydration is continuously performed, so that the accuracy of the eccentric sensing portion 53 is lowered. Accordingly, in this interval, the controller 51 determines whether to accelerate or stop the inner tank 6 according to the detection value of the vibration sensing unit 55.

In FIG. 4, drainage is continuously performed in the section from S1 to S7 (pump ON), and the above description has been made accordingly. However, the drain pump 24 does not necessarily have to be continuously operated in this section. That is, it is also possible that the drain pump 24 is operated discontinuously, for example, the operation and the stopping are repeated at regular intervals, and the operation can be controlled according to the detection value of the water level sensing unit 52. Therefore, in the section from S1 to S7, the water dehydrated from the captive water is drained to the outside of the outer tank 4 with the lapse of time, so that the moisture content of the capsule or the total load of the inner tank 6 is gradually reduced. The multiple in the embodiments is also the same.

FIG. 5 illustrates a method of controlling the dewatering of a washing machine according to a second embodiment of the present invention.

Referring to FIG. 5, the method for controlling the dewatering of the washing machine according to the second embodiment of the present invention includes driving the inner tank 6 at the first speed V1 while draining the washing water in the inner tank 6 (S11). The first speed V1 is a speed equal to or lower than the resonance point while the inner volume 6 can be sensed by the volume sensing unit 54 while the inner tank 6 is operating at the first speed V1, V2, V3, V4, and V5 at the time of the internal tank 6 operation can be set in accordance with the detection value of the controller 54. [

If the water level sensed by the water level sensing unit 52 reaches a predetermined set water level while the inner tank 6 is operated at the first speed V1 and the control unit 51 determines that the water level in the inner tank 6 is low, To the second speed (V2) and the third speed (V3), and then brakes them (S12 to S13).

Thereafter, after a predetermined time has elapsed (S14), the rotational speed of the inner tank 6 is set to the first speed V1, the second speed V2, the third speed V3, the fourth speed V4, (S15 to S19), and passes through the first resonance point, the second resonance point, and the third resonance point in order.

In the present embodiment, if the preceding sections S11 to S13 are referred to as first dehydration on the basis of S14 and the trailing sections S15 to S19 are referred to as second dehydration, The control unit 51 determines whether to accelerate or stop the internal tank 6 according to the detection value of the vibration sensing unit 55. Since the drainage is progressed to some extent during the secondary dehydration period, The control unit 51 determines whether to accelerate or stop the inner tank 6 based on the detection value of the eccentric sensing unit 53. In this case,

6 shows a method of controlling the dewatering of the washing machine according to the third embodiment of the present invention.

Referring to FIG. 6, in the method of controlling the dewatering of the washing machine according to the third embodiment of the present invention, the washing water in the inner tank 6 is drained (S21). The control unit 51 controls the drainage unit 20 to operate so as to discharge the wash water in the outer tub 4 and controls the drainage unit 20 when the water level sensed by the water level sensing unit 52 reaches the airflow. (Drainage OFF).

Thereafter, the inner tank 6 is rotated at a first speed V1 having a value equal to or smaller than the first resonance point, and the spray water is sprayed into the inner tank 6 by the sprayer 57 (S22). The spraying of the washing water S22 is stopped when the water level sensed by the water level sensing unit 52 reaches a predetermined water level.

The volume can be sensed by the bulk amount sensing unit 54 while the inner tank 6 is being rotated at the first speed V1 and the rotation speeds V2, V3, V4 , V5) can be set.

After the washing water injection (S22) is completed, the rotational speed of the inner tank (6) is raised to the second speed (V2) while the washing water in the outer tub (4) (S23). The second velocity V2 is a velocity that does not reach the first resonance point.

After the second speed V2 operation, the rotational speed of the inner tank 6 is accelerated from the second speed V2 to the third speed V3 (S24) while passing through the first resonance point. The total load of the inner tank 6 is increased by the washing water sprayed in S2 so that the first resonance point is relatively low as compared with the case where the water level is in air. Accordingly, since the inner tank 6 can pass through the first resonance point in a state where the rotational speed of the inner tank 6 is lower than that in the idle state, and the dehydration is continuously performed while passing through the first resonance point, It becomes lighter and less vibration is generated.

On the other hand, the set water level serving as a reference for accelerating the rotation speed of the inner tank 6 from the first speed V1 is a speed at which the centrifugal circulation water is not generated when the inner tank 6 is rotated at the first speed V1 or more . The speed at which the centrifugal circulation flow is formed can be determined on the basis of the centrifugal force, the water level, the rotational speed of the inner tank 6, and the like, and the rotational speed of the inner tank 6 is accelerated from the first speed V1 to the second speed V2 Since the time taken for the internal tank 6 to operate is very small compared to the time for which the internal tank 6 is operated at the second speed V2, the set water level should be considered such that centrifugal circulation water is not formed during operation of the internal tank 6 at the second speed V2 Particularly, in order to maximize the total load of the inner tank 6 within a range in which the centrifugal circulation flow is not formed, the set water level is set such that the inner tank 6 is operated at the second speed V2, It is preferable to set the maximum value within a range where the film is not formed.

Particularly when considering that the rotational speed of the inner tank 6 passes through the first resonance point in the section S24 in which the rotational speed of the inner tank 6 is accelerated from the second speed V2 to the third speed V3, 6), it is necessary to secure enough centrifugal force to disperse the bag in S24 section. Therefore, in order to maximize the dispersion of the bubble due to the centrifugal force and also to maximize the total load of the inner tank 6 at the time of passing through the first resonance point (including the load of the washing water and the washing water) In addition, it is preferable that the set water level has a maximum value within a range in which centrifugal circulation flow is not formed in the S24 section.

After passing the first resonance point in S24, the inner tank 6 is operated at the third speed V3 for a predetermined time (S25), and the inner tank 6 is moved to the fourth speed V4 to pass the second resonance point (S26).

Meanwhile, when the vibration sensed by the vibration sensing unit 55 during the second speed operation (S23) and the third speed operation (S24) is detected as a predetermined value or more, that is, when the transient vibration is sensed, So that the operation of the inner tank 6 is stopped.

During the second speed operation (S23) and the third speed operation (S24), there is still a considerable amount of water in the bottle, and the dehydration is continuously performed, and the accuracy of the eccentric sensing portion (53) deteriorates. Accordingly, in this interval, the controller 51 determines whether to accelerate or stop the inner tank 6 according to the detection value of the vibration sensing unit 55. In particular, when the sensed value of the vibration sensing unit 55 is detected to be equal to or greater than a predetermined magnitude, the control unit 51 determines that excessive vibration has occurred, and brakes the inner tank 6 in the step S24 passing the first resonance point.

However, after the fourth speed operation (S26), the valve is dehydrated to a considerable level, so that the accuracy of the eccentric sensor 53 can be ensured. Whether the acceleration to the fifth speed (V5) Is determined according to the amount of eccentricity sensed by the sensing unit 53, and thus accelerates from the fourth speed V4 to the fifth speed V5 and passes through the third resonance point. Thereafter, the inner tank 6 is operated for a predetermined time at the fifth speed V5, and then braking is performed to end dehydration. (S27 to S28)

FIG. 7 illustrates a method of controlling the dewatering of a washing machine according to a fourth embodiment of the present invention.

Referring to FIG. 7, in the method of controlling the dewatering of the washing machine according to the fourth embodiment of the present invention, the washing water in the inner tank 6 is drained (A1). The control unit 51 controls the drainage unit 20 to operate so as to discharge the wash water in the outer tub 4 and controls the drainage unit 20 when the water level sensed by the water level sensing unit 52 reaches the airflow. (Drainage OFF).

Thereafter, the inner tank 6 is accelerated and rotated at a first speed V1 having a value equal to or lower than the first resonance point, and washing water is sprayed into the inner tank 6 (A2, injection ON). The spray A2 of the washing water is stopped when the water level sensed by the water level sensing unit 52 reaches the set water level (injection OFF).

The volume can be sensed while the inner tank 6 is being rotated at the first speed V1 and the rotational speeds V2, V3, V4 and V5 of the inner tank 6 can be set according to the sensed volume .

As described above, the washing water injection in A2 is stopped when the water level in the outer tank 4 reaches the set water level, and the set water level is lower than the first speed V1 when the inner tank 6 rotates, 4 and the inner tank 6 is set so as not to exceed the upper end of the inner tank 6.

After the washing water injection A2 is completed, the rotation speed of the inner tank 6 is raised to the second speed V2 while the washing water in the outer tank 4 is drained again, (A3). The second velocity V2 is a velocity that does not reach the first resonance point.

After the second speed V2 operation, the rotational speed of the inner tank 6 is accelerated from the second speed V2 to the third speed V3 (A4) while passing through the first resonance point. The total load of the inner tank 6 is increased by the wash water sprayed from the nozzle A2, and the first resonance point is relatively lower than that in the case where the water level is in the air-flow. Accordingly, since the inner tank 6 can pass through the first resonance point in a state where the rotational speed of the inner tank 6 is lower than that in the idle state, and the dehydration is continuously performed while passing through the first resonance point, It becomes lighter and less vibration is generated. The inner tank 6 is operated for a predetermined time at the third speed V3 and then braked.

On the other hand, the set water level serving as a reference for accelerating the rotation speed of the inner tank 6 from the first speed V1 is a speed at which the centrifugal circulation water is not generated when the inner tank 6 is rotated at the first speed V1 or more . The speed at which the centrifugal circulation flow is formed can be determined on the basis of the centrifugal force, the water level, the rotational speed of the inner tank 6, and the like, and the rotational speed of the inner tank 6 is accelerated from the first speed V1 to the second speed V2 Since the time taken for the internal tank 6 to operate is very small compared to the time for which the internal tank 6 is operated at the second speed V2, the set water level should be considered such that centrifugal circulation water is not formed during operation of the internal tank 6 at the second speed V2 Particularly, in order to maximize the total load of the inner tank 6 within a range in which the centrifugal circulation flow is not formed, the set water level is set such that the inner tank 6 is operated at the second speed V2, It is preferable to set the maximum value within a range where the film is not formed.

Particularly when considering that the rotational speed of the inner tank 6 is accelerated from the second speed V2 to the third speed V3 and passes through the first resonance point, The centrifugal force must be sufficiently secured to disperse the plow in the section accelerated from the second speed V2 to the third speed V3. Therefore, in order to maximize the dispersion of the bubble due to the centrifugal force and to make the total load of the inner tank 6 at the time of passing through the first resonance point (including the load of the bubbles and wash water) In addition, it is preferable that the set water level has a maximum value within a range in which centrifugal circulation flow is not formed in the A4 section.

After the primary dewatering (A1 to A4) is completed and the predetermined time has elapsed (A5), secondary dehydration (A6 to A10) is performed.

During the second dewatering, the speed of the inner tank 6 is stepwise raised to the first speed V1, the second speed V2, the third speed V3, the fourth speed V4 and the fifth speed V5 . Particularly, a section accelerated from the second speed V2 to the third speed V3, a section accelerated from the third speed V3 to the fourth speed V4 and a section accelerated from the fourth speed V4 to the fifth speed V5 ) Through the resonance point.

Therefore, it is preferable that the eccentricity is detected by the eccentric sensing unit 53 at a speed before passing through the resonance point of each section, and it is determined whether or not to accelerate to the next speed according to the detected eccentricity. For example, when the inner tank 6 is operated at the second speed V2, when the eccentricity detected by the eccentricity sensing unit 53 is lower than the predetermined value, the acceleration operation is performed at the third speed V3, When the detected eccentricity is higher than the predetermined value, the rotational speed of the inner tub 6 is reduced or stopped to reduce the vibration due to the eccentricity.

FIG. 8 illustrates a method of controlling the dewatering of the washing machine according to the fifth embodiment of the present invention. Hereinafter, a method of dewatering the washing machine according to the fifth embodiment of the present invention will be described with reference to FIG. A 1 to A 10 have already been described above, so that detailed description thereof will be omitted.

The dewatering control method of the washing machine according to the present embodiment differs from the fourth embodiment of the present invention described above with reference to FIG. 7 in that B1 to B4 are performed before A1 to A10 are performed.

B1 to B4 are processes for lowering the concentration of the detergent water to prevent excessive bubbles from being generated due to residual detergent while the inner tank 6 is rotated for dehydration. Hereinafter, the dewatering control method according to the present embodiment will be described as applied to dewatering a fabric having been previously washed using a detergent.

After the washing or rinsing is completed, the wash water (hereinafter referred to as "detergent water") in which the detergent dissolved in the inner tank 6 or the outer tank 4 is discharged (B1).

While the detergent water is being drained, the rotating speed of the inner tank 6 is accelerated to the sixth speed V6 (B2). At this time, the drainage is stopped while the inner tank 6 is rotating at the sixth speed V6, and the washing water is sprayed into the inner tank 6 by the sprayer 57 for a predetermined time (B3). The detergent stuck in the cloth is washed by the sprayed washing water, and the concentration of the detergent water is lowered. Here, the sixth speed V6 is a value between the second speed V2 and the third speed V3, and is set so as not to exceed the first resonance point.

Thereafter, the detergent solution containing the outer tub 4 is drained, and the rotation of the inner tub 6 is braked (B4).

Thereafter, when the water level detection unit 52 detects that the water level in the outer tub 4 is above the airflow, the water drain is stopped (A1) and A2 to A10 are performed.

9 shows a method of controlling the dewatering of a washing machine according to a sixth embodiment of the present invention. Hereinafter, a method of controlling the dewatering of the washing machine according to the sixth embodiment of the present invention will be described with reference to FIG. Steps A1 to A10 have already been described above, so that the description thereof will be omitted.

The dewatering control method of the washing machine according to the present embodiment differs from the fourth embodiment of the present invention described above with reference to FIG. 7 in that the steps C1 to C3 are performed before the steps A1 to A10 are performed.

C1 to C3 are steps for lowering the concentration of the detergent water to prevent excessive foaming due to the remaining detergent while the inner tank 6 is rotated for dehydration. Hereinafter, the dewatering control method according to the present embodiment will be described as applied to dewatering a fabric having been previously washed using a detergent.

After the washing or rinsing is completed, the detergent water contained in the inner tank 6 or the outer tank 4 is discharged (C1).

The inner tank 6 is accelerated to the seventh speed V7 while the drainage is being performed by the drainage section 20 and is operated at the seventh speed V7 for a predetermined time (C2), and again from the seventh speed V7 Accelerates to the sixth speed V6, and operates at the sixth speed V6 for a predetermined time (C3). Here, the sixth speed V6 is a speed lower than the first resonance point, and the seventh speed V7 is set to a value between the second speed V2 and the sixth speed V6.

Thereafter, when it is detected by the water level sensing unit 52 that the water level has reached the water level, the water drain is stopped (A1) and A2 to A10 are performed.

In the present embodiment, before the execution of A1 to A10, the rotary speed of the inner tank 6 is gradually accelerated (C2 to C3) within the range below the first resonance point, whereby the dehydration of the dehydrated deodorant is sufficiently performed, The washing water is sprayed into the inner tank 6 again (A2), and bubbles are prevented from being generated even if the inner tank 6 is rotated for dehydration.

FIG. 10 illustrates a method of controlling the dewatering of a washing machine according to a seventh embodiment of the present invention. Hereinafter, a dewatering control method of a washing machine according to a seventh embodiment of the present invention will be described with reference to FIG. Steps A1 to A10 have already been described above, so that the description thereof will be omitted.

The dewatering control method of the washing machine according to the present embodiment is different from the fourth embodiment of the present invention described above with reference to FIG. 7 in that the steps D1 to D5 are performed before the steps A1 to A10 are performed.

D1 to D5 are steps for lowering the concentration of the detergent water to prevent excessive foaming due to residual detergent while the inner tank 6 is rotated for dehydration. Hereinafter, the dewatering control method according to the present embodiment will be described as applied to dewatering a fabric having been previously washed using a detergent.

After the washing or rinsing is completed, the detergent water contained in the inner tank 6 or the outer tank 4 is discharged (D1). The inner tank 6 is accelerated to the sixth speed V6 while the drainage is being performed by the drainage section 20 and is operated at the sixth speed V6 for a predetermined time before braking (D2). The water drains D1 to D4 can be detected and stopped by the water level sensing unit 52 as the water level in the outer tank 4 is above the water level.

Then, the inner tank 6 is operated at the first speed V1 while spraying the washing water into the inner tank 6 by the jetting unit 57 (D4). The concentration of the washing water contained in the outer tub 4 is lowered by the sprayed washing water.

Thereafter, the jetting of the washing water is stopped, the rotational speed of the inner tank 6 is accelerated from the first speed V1 to the sixth speed V6, and then the brake is operated to perform the drainage. (D5) The sixth speed V6 is a value between the second speed V2 and the third speed V3 and is set so as not to exceed the first resonance point.

Thereafter, when it is detected by the water level sensing unit 52 that the water level has reached the water level, the water drain is stopped (A1) and A2 to A10 are performed.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

Claims (15)

delete delete delete (A) draining washing water in the outer tub;
(B) stopping the drainage when the level in the outer tank reaches the airflow;
(C) injecting washing water into the bathtub and rotating the bathtub at a first speed lower than the first resonance point in a state where drainage is stopped; And
Wherein when the water level in the outer tank rises and reaches the set water level due to the washing water sprayed in the step (c), the spraying of the washing water is stopped and drainage is performed, and the inner tank is operated at a higher speed than the first speed (d)
The step (d)
And passing the first resonance point while increasing the velocity of the inner resonance,
The set water level,
The washing tub having a maximum value within a range in which the maximum rising height of the washing water that rises along the interval between the outer tub and the inner tub does not exceed the upper end of the inner tub by the centrifugal force acting by the rotation of the inner tub while passing through the first resonance point Dehydration control method. delete 5. The method of claim 4,
The step (d)
And operating the inner tank at a second speed that is equal to or higher than the first speed and lower than the first resonance point,
Wherein the step of passing through the first resonance point is performed after the second speed operation. delete 5. The method of claim 4,
Further comprising the step of: (e) decelerating the inner tank after the step (d), and further accelerating the speed of the inner tank step by step. 9. The method of claim 8,
The step (e)
Sensing an eccentricity while the inner tank is operated at a predetermined resonance point or lower; And
And accelerating the inner tank according to the detected amount of eccentricity to pass the resonance point while the inner tank is accelerating. 5. The method of claim 4,
Before the step (a)
Further comprising the step of operating the inner tank at a speed greater than the first speed while keeping the inner tank below the first resonance point while draining the wash water in the outer tank. 11. The method of claim 10,
Further comprising the step of stopping the drainage and spraying the washing water into the inner tank during operation of the inner tank before the step (a). 12. The method of claim 11,
Further comprising the step of stopping the spraying of the washing water before the step (a) and performing the drainage again. 5. The method of claim 4,
Further comprising the step of accelerating the inner tank in a stepwise manner within a range below the first resonance point and draining the washing water in the outer tank before the step (a). 5. The method of claim 4,
Further comprising the step (f) of driving the inner tank at a speed lower than the first resonance point before the step (a)
(F) discharging the wash water in the outer tank; (f-1) discharging the wash water in the outer tank;
(F-2) stopping the drainage in the step (f-1), spraying washing water into the inner tank while driving the inner tank at a lower speed than in the step (f-1); And
(F-3) stopping the spraying in the step (f-2) and discharging the washing water in the outer tub while driving the inner tub at a higher speed than in the step (f-2) Control method. A dewatering control method for a washing machine according to any one of claims 10, 13 and 14,
A method of controlling dewatering of a washing machine performed after washing with detergent.

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