KR20070117388A - Dehydration Control Method of Washing Machine - Google Patents

Abstract

A method for controlling a spin-drying operation of a washing machine is provided to decrease an eccentricity sensing process of a washing tub after finishing a rinsing process. A method for controlling a spin-drying operation of a washing machine includes a step of supplying water to a washing tub; a step of rotating the washing tub after a rinsing process and sensing eccentricity of the washing tub(S110,S120); a step of injecting the water to laundries of an inside for the washing tub according to a degree of eccentricity for the washing tub(S130); a step of rotating the washing tub and sensing the degree of eccentricity for the washing tub(S140); and a step of performing a main spin-drying process by increasing rotating speed of the washing tub as the detected degree of the eccentricity for the washing tub is lower than a set value(S150,S160).

Description

Dehydration control method of washing machine {DEHYDRATION CONTROL METHOD FOR WASHING MACHINE}

1 is a cross-sectional view of a conventional washing machine,

2 is a view for explaining a dehydration control method of the washing machine of FIG.

3 is a cross-sectional view of a washing machine for implementing the dehydration control method of the washing machine according to an embodiment of the present invention;

4 is a control block diagram of the washing machine of FIG.

5 is a flowchart illustrating a dehydration control method of a washing machine according to an embodiment of the present invention;

6 is a flowchart illustrating a dehydration control method of a washing machine according to another embodiment of the present invention;

7 is a flowchart illustrating a dehydration control method of a washing machine according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110: cabinet 121: tub

127: drive motor 131: drainage passage

133: drain pump 135: circulation passage

137: circulation pump 141: water supply

143: water supply pipe 145: water supply valve

151: washing tank 161: control unit

163: eccentricity detection unit 165: detection frequency calculation unit

The present invention relates to a dehydration control method of the washing machine, and more particularly, to a dehydration control method of the washing machine to shorten the eccentricity detection process of the washing tank after the end of the rinsing process.

1 is a cross-sectional view of a conventional washing machine, Figure 2 is a view for explaining the dehydration control method of the washing machine of FIG. As shown in FIG. 1, the washing machine includes a cabinet 11 forming an exterior, a tub 21 installed inside the cabinet 11 to accommodate washing water therein, and a tub 21 of the tub 21. A washing tub 31 is rotatably installed therein.

The cabinet 11 is formed to have a tubular shape of a rectangular parallelepiped, and a door 15 is provided at one side so that laundry can enter and exit. The tub 21 is formed to have an open cylindrical shape on one side, and is suspended by the spring 23 and the damper 25 in the cabinet 11. A driving motor 27 is installed at the rear end of the tub 21 so as to rotate and drive the washing tub 31, and a drain passage for draining the washing water therein in the lower region of the tub 21. 28) is connected. The drain passage 28 is provided with a drain pump 29.

The washing tub 31 has a cylindrical shape and is rotated about a rotation axis arranged almost horizontally. A plurality of through-holes 33 are formed on the circumferential surface of the washing tank 31, and a plurality of lifts 35 protruding inward to transfer the laundry to the upper region are provided on the inner surface thereof.

The dehydration control method of the conventional washing machine having such a configuration will be described with reference to FIG. 2.

When the rinsing process is finished (S10), the control unit (not shown) controls the drainage pump 29 to open the drainage passage 28 so that the washing water inside the tub 21 is discharged to the outside along the drainage passage 28 ( S20).

The control unit causes power to be applied to the drive motor 27 so that the washing tank 31 is rotated at a predetermined low speed so that the eccentric amount UB _i of the washing tank 31 is sensed (S30), and the eccentric amount sensing frequency n _i. ) Is calculated (S40). Next, the detected eccentric amount (UB _i ) and the set value (UB _set ) set to the extent that the main dehydration is possible to compare with each other (S50), and if the detected amount of the eccentricity of the washing tank 31 is less than the set value, the control unit washing tank 31 By controlling the drive motor 27 of the) to increase the number of revolutions so that the main dehydration is carried out (S50). On the other hand, if the detected eccentricity exceeds the set value, the above-described eccentricity detection process is repeated, and when the number of eccentricity detection is greater than or equal to the maximum set frequency (n _max ), an error is displayed externally (S80), and the driving motor 27 The driving stops (S90).

However, the dehydration control method of the conventional washing machine, since the laundry inside the washing tank 31 contains sufficient water in the initial stage of detecting the eccentric amount of the washing tank 31, The laundry has a space to tumble, but as time passes, the moisture contained in the laundry decreases due to centrifugal force, thereby increasing the volume of the laundry, and when the volume of the laundry increases, the laundry is positioned inside the washing tank 31. The space to fluctuate becomes small. Accordingly, it is difficult for the laundry to be uniformly balancing inside the washing tub 31, and it takes a long time to enter the main dehydration. In particular, depending on the type and the amount of laundry, there is a problem that can not enter the main dehydration while repeating only the above-described balancing process and the eccentricity detection process.

In order to solve the above problems, an object of the present invention is to provide a dehydration control method of the washing machine to shorten the eccentric amount detection process of the washing tank after the end of the rinsing.

Another object of the present invention is to provide a method for controlling dehydration of a washing machine that not only shortens the overall dehydration time of laundry but also improves the degree of washing of the laundry.

The present invention provides a method for controlling dehydration of a washing machine in order to achieve the object as described above, comprising: a first sensing step of sensing an eccentric amount of the washing tank while rotating the washing tank after the rinsing process is finished; A water spraying step of spraying water on the washing water in the washing tank according to the eccentric amount of the washing tank; A second sensing step of sensing an eccentric amount of the washing tank while rotating the washing tank after the water spraying step; It provides a dehydration control method of a washing machine comprising.

This is to distribute the laundry evenly in the washing tank before the present dewatering process, which rotates at a high speed such as 800 rpm to 1200 rpm in order to dewater the laundry more quickly and stably, and between 80 rpm and 130 rpm. When the water inside the washing tank that rotates at the same low speed is not evenly distributed in the washing tank, the water is separated, and the space between the laundry increases and there is less space for the laundry inside the washing tank to tumble. If the amount of rotation eccentricity is higher than the set value, the laundry is recognized as being locally concentrated in the washing tank and is not evenly distributed. By spraying water on the laundry inside, the volume of the laundry is prevented from increasing so that the laundry is distributed evenly in the washing tank. To ensure that the laundry is inside, It is to to reduce the time to be uniformly disposed.

Here, the dehydration control method of the washing machine is preferably a dehydration control method of the drum washing machine in which the washing tank is rotated.

Before the water spraying step, it is effective to compare the detected eccentricity with a set value so that water is sprayed on the laundry inside the washing tank only when the detected eccentric amount exceeds the set value. Through this, it is possible to prevent unnecessary water injection or increase the dehydration time.

When the detection result of the eccentric amount of the washing tank is less than or equal to the set value, the spin speed of the washing tank is increased to 800 rpm to 1200 rpm to perform main dehydration.

It may be configured to further include the step of watering the water inside the tub before the water spraying step. Thereby, the rinsing effect or washing | cleaning effect of laundry with the water supplied further can be improved.

The method may further include stopping the drainage of the tub before the water spraying step, and in the water spraying step, the water that is not drained by the drainage stop is circulated and sprayed. At this time, since the non-drained water is present inside the tub after the last rinsing, there is no problem of recontamination and the washing degree of the laundry can be improved without causing an increase in the amount of water used.

The method may further include calculating a cumulative number of times of detecting the eccentric amount after the sensing of the respective eccentric amounts, and stopping the drainage of the tub may be performed when the cumulative number of times is greater than or equal to a set number of times. In the initial stage of detecting the amount of eccentricity of the washing tank, the amount of water released from the laundry by centrifugal force is much larger than the amount of water circulating to spray water into the washing tank, so that some of the washing tank is drained and the remaining water is circulated. It is preferable that unnecessary washing water is not left in the tub so as to be sprayed on the laundry.

On the other hand, according to another field of the present invention, the first sensing step of detecting the eccentric amount of the washing tank while rotating the washing tank after the end of the rinsing; Repeating the first sensing step when the detected eccentricity exceeds a set value and calculating a sensing frequency; A water spraying step of spraying water into the washing tank when the number of times of detection is more than a predetermined number of times; A second sensing step of sensing an eccentric amount of the washing tank after the water spraying step; A dewatering control method for a washing machine is provided.

This prevents the laundry from increasing the volume of the laundry and reduces the space for moving the laundry by supplying moisture to the laundry at a time when the volume of the laundry decreases, thereby increasing the volume of the laundry. This is to prevent the laundry from being shortened to uniformly arrange the laundry inside the washing tank.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

3 is a cross-sectional view of the washing machine for implementing the dehydration control method of the washing machine according to an embodiment of the present invention, Figure 4 is a control block diagram of the washing machine of Figure 3, Figure 5 is a washing machine according to an embodiment of the present invention 6 and 7 are flowcharts illustrating a dehydration control method of the washing machine according to another embodiment of the present invention. As shown in FIG. 3, the washing machine includes a cabinet 110 that forms an exterior and a tub that is suspended by a spring 123 and a damper 125 inside the cabinet 110 to accommodate washing water therein. And a washing tub 151 rotatably installed in the tub 121.

The cabinet 110 is formed to have a substantially rectangular parallelepiped shape, and a door 115 is provided at a front side thereof to allow laundry to enter and exit.

The tub 121 has a cylindrical shape in which one side is opened and is suspended by a spring and a damper. The tub 121 has a cylindrical shape and a washing tub 151 having a plurality of through holes 153 formed on a circumferential surface thereof is rotatably installed. The inside of the washing tank 151 is provided with a plurality of lifts 155 protruding inward so that the laundry can be transported to the upper region during rotation. The rear end of the tub 121 is provided with a drive motor 127 to rotate the washing tank 151.

A drain passage 131 is formed at one lower side of the tub 121 so as to drain the washing water therein, and the drain passage 131 is provided with a drain pump 133. The other end of the tub 121 has a circulation passage 135 is formed to draw the washing water inside and to be sprayed in the upper region of the tub 121, the circulation passage 135, the circulation pump 137 is provided. The water supply unit 141 is installed in the upper region of the tub 121 so as to supply water into the tub 121. The water supply part 141 is provided with the water supply pipe 143 connected to the water pipe, and the water supply valve 145 which opens and closes the said water supply pipe 143. The water supply pipe 143 is provided with a detergent supply unit 147 to supply detergent to the inside of the tub 121.

On the other hand, the washing machine, by detecting the amount of eccentricity of the washing tank 151 according to the distribution of the laundry inside the washing tank 151 and sprays water on the laundry based on the detection result to shorten the eccentric amount detection time of the washing tank Eccentricity detection unit 163 for detecting the amount of eccentricity of the washing tank 151, the detection recovery unit 165 for accumulating the number of eccentricity detection and the detection result and the detection of the eccentric amount detection unit 163 A control unit 161 for controlling the driving motor 127, the water supply valve 145, the drainage pump 133, and the circulation pump 137, respectively, based on the calculation result of the recovery calculation unit 165. It is composed.

Hereinafter, a dehydration control method of the present washing machine having the above-described structural features will be described with reference to FIGS. 5 and 6.

First, referring to FIG. 5, when the rinsing process is finished (S110), the controller 161 drives the drain pump 133 to drain the washing water inside the washing tank 151 (S120). Next, the control unit 161 controls the drive motor 127 so that the washing tank 151 rotates at a low speed (for example, about 80 rpm to about 130 rpm) (S130), and controls the eccentricity sensing unit 163. The eccentric amount (UB _i ) of the washing tank 151 to be detected (S140). In addition, the control unit 161 controls the detection frequency calculation unit 165 to accumulate the eccentricity detection frequency n _i (S150).

The eccentricity sensed by the eccentricity sensing unit 163 is compared with the set value (UB _set ) (S160), and if the detected eccentricity is less than the set value, the driving speed is increased so that the rotation speed of the washing tank (151) The motor 127 is controlled to perform main dehydration (S170).

On the other hand, if the detected eccentricity exceeds the set value (S160), the controller 161 compares the accumulated eccentricity detection frequency and the maximum set frequency (n _max ) (S180). Here, the maximum set frequency means an upper limit of the number of detection times that can allow the eccentricity detection process to prevent the eccentricity detection process from repeating indefinitely. When the number of times of detection is greater than or equal to the maximum set number of times, the controller 161 causes an error such as a warning to be displayed to the outside by the display means (not shown) (S181), and the driving of the driving motor 127 is stopped (S182). ).

When the accumulated eccentricity detection frequency is less than or equal to the maximum set frequency (S180), the controller 161 controls to stop the driving motor 127 (S190), and controls the water supply valve 145 to the tub ( In step 121, an additional water supply of a predetermined amount is performed (S200). Next, the control unit 161 drives the circulation pump 137 so that a predetermined amount of water is injected into the laundry of the washing tank 151 (S210). Here, as shown in FIG. 6, when the eccentricity detection frequency n _i is greater than or equal to the set frequency n _set after stopping the driving motor 127 (S190) (S195), the controller 161 may include a drain pump ( Stop driving of the 133 (S205), it is also possible to circulate the water that is not drained to spray water to the laundry.

The controller 161 calculates the driving time T _2i of the circulation pump 137 (S220), and compares the calculated driving time with the set time (S230). If the calculated driving time is greater than or equal to the set time, the predetermined amount of water is regarded as being injected into the laundry, and the driving of the circulation pump 137 is stopped (S240). When the process is terminated, the control unit 161 controls the drive motor 127 to rotate at low speed (S130), and controls the eccentric amount detecting unit 163 to detect the eccentric amount of the washing tank 151. Allow a process to be performed repeatedly.

Hereinafter, a dehydration control method of the washing machine according to another embodiment of the present invention will be described with reference to FIG. 7. The same and equivalent parts as the above-described process will be omitted for convenience of description.

As shown in FIG. 7, when the rinsing process is finished (S110), the controller 161 drives the drain pump 133 to drain the washing tank 151 (S110). S120). Next, the washing tank 151 is rotated at a low speed by controlling the driving motor 127 (S130), and the eccentric amount UB _I of the washing tank 151 is controlled by controlling the eccentric amount detecting unit 163. In addition to the control box (S140) to control the detection recovery unit 165 to accumulate the eccentricity detection frequency (n _i ) (S150).

When the detected eccentricity is compared with the _set value UB _set (S160), and if the detected eccentricity exceeds the set value, the control unit 161 calculates the eccentricity detection frequency calculated by the detection recovery unit 165. _i ) and the maximum set frequency (n _max ) is compared (S190). If the eccentricity detection frequency is less than the maximum set frequency, the drive motor 127 is stopped (S190). When the detected eccentricity detection frequency n _i is less than the set frequency n _set (S300), the driving motor 127 is driven at a low speed (S130), and the following process of detecting the eccentric amount is repeated.

On the other hand, if the eccentricity detection frequency is more than the predetermined number of times (S300), a predetermined amount of water is sprayed into the washing tank 151 (S310). Here, in spraying the water into the washing tank 151, as described above with reference to FIG. 5, after the additional water supply (S200), the circulation pump 137 may be driven to allow water to be injected, As described above with reference to FIG. 6, after the driving of the drain pump 133 is stopped to stop the drainage, the circulation pump 137 may be driven to circulate the non-drained water while allowing the water to be injected.

When a predetermined amount of water is injected into the washing tank 151, the controller 161 controls the driving motor 127 to detect the eccentric amount of the washing tank 151 while rotating the washing tank 51 at a low speed. Repeat this process until the main dehydration process is performed.

As described above, according to the present invention, after the rinsing process, the first sensing step of detecting the eccentric amount of the washing tank while rotating the washing tank, and water spray for spraying water to the laundry inside the washing tank according to the eccentric amount of the washing tank And a second sensing step of sensing an eccentric amount of the washing tank while rotating the washing tank after the water spraying step; thereby supplying moisture to the laundry in which water is released by the rotation of the washing tank to increase the volume of the laundry. The dehydration control method of the washing machine can be suppressed to increase and shorten the eccentricity detection process of the washing tank.

In addition, according to the present invention, after calculating the eccentricity detection frequency of the washing tank and stops the tub drain on the basis of the calculation result, by circulating the non-drained water to be sprayed into the laundry inside the washing tank unnecessary water to the laundry It is possible to prevent the injection is provided in the dehydration control method of the washing machine that can shorten the overall dehydration time.

In addition, according to the present invention, before the water is sprayed to the laundry inside the washing tank, a predetermined amount of water is first supplied to the inside of the tub, and the circulated water is circulated to be sprayed on the washing water, thereby detecting an eccentric amount of the washing tank. Also provided is a dehydration control method of the washing machine to obtain a rinsing effect. As a result, the rinsing process can be shortened while maintaining the same rinsing effect, thereby reducing the overall washing time. In addition, if the rinsing process is not shortened, washing degree of the laundry may be further improved.

Further, according to the present invention, the first sensing step of detecting the eccentricity of the washing tank while rotating the washing tank after the end of the rinsing, and repeating the first sensing step when the detected eccentricity exceeds a set value and calculates the number of times of detection And a water injection step of spraying water into the washing tank when the number of times of detection is equal to or greater than a set number of times, and a second sensing step of sensing an eccentricity of the washing tank after the water spraying step. Control method of washing machine to reduce the movement space of the laundry by increasing the number of the washing machine and to prevent the process of spraying water unnecessarily and to shorten the time for the laundry to be uniformly arranged in the washing tank. This is provided.

Claims (8)

As a dehydration control method of the washing machine, A first sensing step of sensing an eccentric amount of the washing tank while rotating the washing tank after the rinsing process is finished; A water spray step of spraying water on the laundry inside the washing tank according to an eccentric amount of the washing tank; A second sensing step of sensing the eccentricity of the washing tank while rotating the washing tank after the water spraying step; Dehydration control method of a washing machine comprising. The method of claim 1, If the detected amount of eccentricity of the washing tank is lower than the set value, increasing the rotational speed of the washing tank further comprising the step of performing the dehydration process of the washing machine. The method according to claim 1 or 2, Dewatering control method of the washing machine further comprising the step of watering the tub before the step of detecting the eccentric amount of the washing tank by spraying water on the laundry. The method according to claim 1 or 2, Stopping the drain of the tub before the water spraying step, the dewatering control method of the washing machine, characterized in that for circulating the non-drained water is supplied to the laundry. The method of claim 4, wherein And calculating a cumulative number of times of detecting the eccentricity after the first sensing step and the second sensing step, wherein stopping the drainage of the tub is performed when the cumulative number of times is greater than or equal to a set number of times. Dewatering control method of the washing machine. A first sensing step of sensing an eccentricity of the washing tub while rotating the washing tub after the rinsing end; Repeating the first sensing step when the detected eccentricity exceeds a set value and calculating a sensing frequency; A water spray step of spraying water into the washing tank when the number of times of detection is greater than or equal to a set number of times; A second sensing step of sensing an eccentric amount of the washing tank after the water spraying step; Dehydration control method of a washing machine comprising. The method of claim 6, Dewatering control method of the washing machine further comprising the step of watering the tub before the water spraying step. The method of claim 6, Stopping the drainage of the tub before the water spraying step, the dewatering control method of the washing machine, characterized in that for circulating and spraying the stopped water in the water spraying step.

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