KR20090132220A - Method of controlling washing machine - Google Patents

Abstract

PURPOSE: A controlling method of a washing machine is provided to spin-dry laundry by increasing rotational speed and spin-drying time of a drum, thereby removing residual detergent absorbed into the laundry. CONSTITUTION: It is decided whether a water-saving course is selected(300). If so, while rotational speed of a drum is increased to a first rotational speed faster than rotational speed of spin-drying, the spin-drying of the water-saving course is performed(320). The drum is rotated at the first rotational speed during a preset time. The drum is rotated at a second rotational speed faster than the first rotational speed, during a shorter time than a time when the drum is rotated at the first rotational speed.

Description

Control method of washing machine {METHOD OF CONTROLLING WASHING MACHINE}

The present invention relates to a control method of a washing machine, and more particularly, to a control method of a washing machine for saving water used in washing operation.

A washing machine, one of the representative household appliances, includes a washing stroke for separating laundry contamination with dissolved detergent, a rinsing stroke for rinsing foam or residual detergent with water without detergent, and a dewatering stroke for dewatering the laundry at high speed. Proceed with a series of laundry operations.

In such a washing machine, reducing the water consumption is an important measure of the performance of the washing machine, and in recent years, reducing the water consumption due to the concern of running out of water on the earth has emerged as a social issue. Thus, the washing machine determines the degree of contamination of the laundry, and reduces the consumption of water used in the washing machine by proceeding the washing operation by reducing the number of rinsing according to the determined degree of contamination of the laundry.

However, the conventional water-saving method of the washing machine has a problem in that it does not rinse all the residual detergent absorbed in the laundry by reducing the number of rinses and proceeding the rinsing cycle. Accordingly, the rinsing power of the laundry is reduced, which is a problem that does not satisfy the rinsing performance required by the consumer, resulting in consumer complaints.

The present invention is to solve the above problems, an object of the present invention is to control the rotation speed and dehydration time of the drum during dehydration of the washing machine that can reduce the amount of water used in the rinsing stroke while maintaining the rinsing force of the laundry The present invention provides a control method.

Washing machine control method of the present invention for achieving the above object is a step of determining whether the water saving course, and if it is determined that the water saving course, the rotational speed of the drum during the dewatering of the water-saving course than the rotational speed during the dehydration of the other washing course Increasing the high first rotational speed to dewater the water saving course.

In addition, the dewatering of the water saving course is to rotate the drum at the first rotational speed for a predetermined time, and at a second higher rotational speed higher than the first rotational speed for a time shorter than the time for rotating the drum at the first rotational speed. Made to rotate the drum.

In addition, the drum is rotated at the first rotational speed for a preset time, and when the eccentricity is detected, the drum is continuously rotated at the first rotational speed for the remaining dehydration time of the water saving course.

In addition, the amount of water supplied when performing the rinsing stroke of the water saving course is supplied less than the amount of water supplied when performing the rinsing stroke of the other washing course.

Further, if the washing stroke of the water saving course is left for the first time, the drum rotates by increasing the rotational speed of the drum above the rotational speed of the washing stroke.

In addition, when the first time remains, the operation of stopping the drum for a third time longer than the second time is repeated after increasing the rotation speed of the drum to the rotation speed in the washing stroke and rotating for the second time.

Further, dewatering of the water saving course is intermediate dewatering of the washing stroke and the rinsing stroke.

In addition, dehydration of a water saving course is dehydration performed in a dehydration stroke.

Further, another washing machine control method of the present invention for achieving the above object is a step of determining whether dehydration is started, if dehydration is started after rotating the drum at a first rotational speed for a predetermined time, the first rotation of the drum And spinning at a second rotational speed higher than the first rotational speed for a time shorter than the time to rotate at the speed.

In addition, if the washing stroke has a first time remaining, the drum is rotated by increasing the rotational speed of the drum to be higher than that of the washing stroke.

Further, if the first time remains, the rotational speed of the drum is rotated for a second time at a rotational speed increased from the rotational speed in the washing stroke, and then the operation of stopping the drum for a third time longer than the second time is repeated.

In addition, the drum is rotated at the first rotational speed for a preset time, and when the eccentricity is detected, the drum is continuously rotated at the first rotational speed for the remaining dehydration time.

In addition, the supply amount of water in the rinsing stroke is an amount reduced by a predetermined ratio from the supply amount of water based on the weight of the laundry inside the drum.

Dewatering is also the dewatering performed in a water saving course.

In addition, the first rotational speed of the drum is a rotational speed higher by a predetermined ratio than the rotational speed of the drum during dewatering in the standard course.

Dehydration is also an intermediate dehydration of the washing stroke and the rinsing stroke.

Dehydration is also dehydration performed in the dehydration stroke.

In addition, dehydration is dehydration performed in the intermediate dehydration and dewatering strokes of the washing stroke and the rinsing stroke.

As described above, the present invention increases the rotational speed and the dehydration time of the drum during dehydration so that the residual detergent absorbed in the laundry is more desorbed by dehydrating the laundry. Accordingly, even when a small amount of water is used to rinse the laundry, the rinsing power is maintained and the laundry is rinsed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 is a view showing the configuration of a washing machine according to an embodiment of the present invention. As shown in FIG. 1, the washing machine according to the embodiment of the present invention may be installed inside the main body 10 forming an exterior, and may be rotatable in the drum-shaped water tank 11 containing water and inside the water tank 11. It includes a cylindrical drum (12) is installed so as to contain the laundry, the front of the water tank (11) and the drum 12, the opening (13) to put the inside of the drum (12) or to take out the cloth inside The formed door 14 is installed.

The upper part of the water tank 11 is provided with a detergent supply device 19 for supplying a detergent, and a water supply device 20 for supplying water (washing water or rinsing water).

Detergent supply device 19 is divided into a plurality of spaces inside, it is installed on the front side of the main body 10 to facilitate the user to put detergent and rinsing agent in each space.

In addition, the water supply device 20 and the first water supply pipe 22, the detergent supply device 19 and the connection between the external water pipe and detergent supply device (not shown) to supply water into the water tank (11) and The second water supply pipe 23 connecting between the water tank 11, and the main water supply valve 24 (hereinafter referred to as the first water supply valve) is installed on one side of the first water supply pipe 22 to control the water supply. This configuration allows the water supplied into the water tank 11 to be passed through the detergent supply device 19 so that the detergent in the detergent supply device 19 can be supplied to the water tank 11 together with the water.

In addition, the water supply device 20 is provided on one side of the third water supply pipe 25 for supplying water to the door 14 side, the water supply nozzle 26 installed at the outlet of the third water supply pipe 25, and the third water supply pipe 25. A free water supply valve 27 (hereinafter, referred to as a second water supply valve) installed to control the water supply, and a fourth water supply pipe 28 connecting the third water supply pipe 25 and the detergent supply device 19 are further included. This configuration is to supply a certain amount of water to the door 14 when washing or rinsing so that the foam of the door 14 can be removed.

The lower part of the water tank 11 is provided with a drive motor 30 for rotating the drum 12 to perform the washing, rinsing and dehydrating stroke, and a drainage device 40 for draining the water in the water tank 11. The drainage device 40 includes a drain pipe 41 for guiding water in the water tank 11 to the outside, and a drain pump 42 provided in the drain pipe 41.

FIG. 2 is a control configuration diagram of a washing machine according to a first embodiment of the present invention. As shown in FIG. 2, an input unit 100 and an eccentric detection unit 110 are provided at an input side of a controller 140 that controls overall operation of a washing machine. And the water level detector 120 are connected to communicate with the controller 140. The input unit 100 is provided with various buttons to directly receive the operation information such as the type of laundry, washing course, washing temperature, the rotational speed of the drum during the dehydration stroke, rinse addition, etc. In particular, the input unit 100 is a standard The washing course button 103 and the water saving washing course button 106 are provided. A checker switch is used for the eccentric detection unit 110. When the drum 12 presses the checker switch with excessive vibration due to the eccentricity of the laundry, the eccentric detection unit 110 transmits the eccentricity detection information to the control unit 140. . The water level detector 120 detects the water level of the water in the water tank 11.

In addition, the driver 160 for driving the load 180 is connected to the output side of the controller 140 so as to communicate with the controller 140. The load 180 includes the first water supply valve 24, the second water supply valve 27, the motor 30, and the drain pump 42 described with reference to FIG. 1, and the control unit 140 includes the driving unit 160. By controlling this to drive the load 180 so that the desired washing operation is made.

The control unit 140 has a standard laundry course for performing general washing and an algorithm for a water saving washing course for saving water and performing washing, and performs a corresponding washing course according to a user's selection.

The controller 140 performs intermediate dehydration every time the washing stroke of the standard washing course is finished or the set number of rinses of the rinsing stroke is finished. Medium dewatering in a standard washing course rotates the rotational speed of the drum 12 at about 800 rpm for about 1 minute and 30 seconds to remove residual detergent and foam remaining in the laundry. In addition, in the dehydration stroke, the drum 12 is rotated at a rotational speed (for example, 600 rpm, 800 rpm, 1000 rpm, 1200 rpm) input from the user for 6 minutes to dehydrate the laundry.

Meanwhile, when the water saving laundry course is selected by the user, the controller 140 performs a series of operations such as a washing stroke, a rinsing stroke, and a dehydration stroke of the preset water saving laundry course.

The washing process of the water saving washing course is about 10 minutes after the end time is left, and the drum 12 is rotated in the forward direction at about 65 rpm (first rotation speed) for about 5 seconds (second time). Stop operation for a second (third time), rotate the drum 12 in a reverse direction at about 65 rpm (first rotational speed) for about 5 seconds (second time), and then stop for about 10 seconds (third time) It is set to repeat the operation to make. Accordingly, the drum 12 is stirred side to side to prevent tangling of the laundry. In addition, as the drum 12 rotates rapidly at about 65 rpm higher than the rotation speed (about 20 to 30 rpm) of the conventional washing stroke, the laundry inside the drum 12 adheres more firmly to the inner wall surface of the drum 12. Residual detergent and water absorbed in the laundry is more drained into the water tank (11). Then, the residual detergent and the water which has passed out of the laundry will flow down to the bottom of the water tank 11 as the stop time of the drum 12 lasts longer than the rotation time. Thus, the residual detergent and water accumulated at the bottom of the water tank 11 collides strongly with the laundry by rapidly rotating the drum 12 at about 65 rpm, so that the residual detergent melts more quickly.

In addition, the water saving laundry course performs intermediate dewatering every halfway between the end of the washing stroke or the number of rinsing cycles of the rinsing stroke. This intermediate dewatering proceeds longer than the intermediate dewatering of the standard washing course and is set to rotate the drum 12 at a higher speed. In more detail, the intermediate dewatering of the water saving washing course rotates the drum 12 at about 930 rpm (second rotation speed) for about 3 minutes 30 seconds (4 hours) and the eccentricity from the eccentric detection unit 110 is reduced. If not detected, the drum 12 is rotated at about 1200 rpm (third rotational speed) for about one minute and thirty seconds (fifth hour) so that a large amount of detergent water absorbed in the laundry is dehydrated. On the other hand, if the rotational speed of the drum 12 is further increased in the state in which the eccentricity is detected, excessive vibration occurs, so that the drum 12 is rotated at the second rotational speed for the remaining dehydration time of the intermediate dehydration. As such, the intermediate dewatering of the water-saving washing course has a longer rotation time and a higher rotational speed than the middle dewatering of the standard washing course, so that the residual detergent absorbed in the laundry is discharged with the water. It is possible to perform a rinse cycle using less water than the amount of water used in the rinse cycle of the rinse.

On the other hand, in the first embodiment of the present invention, the first rotational speed of the drum 12 during intermediate dewatering of the water saving course is described as about 930 rpm. However, this first rotational speed is set differently according to the capacity of the washing machine, and is usually set to a rotational speed about 15% higher than the rotational speed of the drum during the intermediate dehydration of the standard washing course, and the second rotational speed is Preferably, the speed is set to about 25% increase over the first rotational speed.

In addition, the dehydration stroke of the water saving washing course is also set longer than the dehydration stroke of the standard washing course (about 15 minutes), and the rotational speed of the drum 12 is also set higher so that the residual detergent absorbed in the laundry is water. More discharged to improve the final wash and rinse power of the laundry.

As such, the controller 140 is set to the algorithm for the water-saving laundry course, a detailed control method of the water-saving laundry course will be described in detail with reference to FIGS.

3 is a flowchart illustrating a control method of a washing machine according to a first embodiment of the present invention. When the water-saving washing course is selected in FIG. 3 (300), the controller 140 agitates the drive motor 15 from side to side and detects the weight of the laundry inside the water tank. The controller 60 supplies water to the water tank 11 until the water level of the water in the water tank 11 reaches an appropriate water level according to the weight of the laundry to be detected (305).

The controller 140 drives and stops the driving motor 15 when the water supply is completed, and applies a rotational force to the drum 12. The controller 140 rotates and stops the drum 12 by the rotational force and washes. Begin 310.

If the end of the washing stroke remains about two minutes while performing the washing stroke (315), the controller 140 sets the drum 12 at about 65 rpm higher than the preset rotation speed (about 20 to 30 rpm) of the washing stroke. After rotating for about 5 seconds, the operation of stopping for about 10 seconds is repeated for the remaining time of the washing stroke, so that the residual detergent absorbed in the laundry is dissolved in water. At this time, the drum 12 is alternately repeated in the forward and reverse directions to prevent tangling of the laundry (320).

When the washing stroke is completed and the washing stroke is completed (325), the control unit 140 drains the water in the water tank 11 (330), and performs an intermediate dehydration step. It will be described in detail with reference to Figure 4 (335).

When the intermediate dehydration is completed, the controller 140 starts a rinsing stroke (340).

The controller 140 supplies water into the water tank 11 according to the detected weight of laundry. At this time, the amount of water is supplied in a constant proportion (about 80%) of the amount of water supplied in the rinse stroke of the standard washing course (345).

When the water supply is completed, the controller 140 proceeds to the N-th rinse (350).

When the rinsing time of the ongoing rinsing is finished (355), the controller 140 drains the water in the water tank 11 (360), and determines whether all of the preset rinsing times have been performed (365).

If all of the preset rinsing cycles have not been performed, the control unit 140 performs intermediate dehydration, and returns to step 345 again to supply water to the water tank 11 and proceed with the next rinsing cycle (370).

On the other hand, if all of the predetermined number of rinsing is performed, the controller 140 ends the rinsing stroke (375).

In addition, the control unit 140 performs a dehydration stroke 380 to end the water saving laundry course, which will be described in detail with reference to FIG. 5 below.

Hereinafter, the intermediate dehydration shown in FIG. 3 will be described in detail with reference to FIG. 4.

When the intermediate dehydration is started, the control unit 140 spins the drum 12 at about 930 rpm to dehydrate the laundry (410).

If the dehydration time is about 1 minute and 30 seconds (420), the controller 140 checks whether the eccentricity is detected (430).

If the eccentricity is not detected, the controller 140 rotates the drum 12 at about 1200 rpm for the remaining dehydration time of the intermediate dehydration so that the laundry can be better dehydrated (440).

On the other hand, if eccentricity is detected, the controller 140 determines that the eccentricity has occurred due to the high rotational speed of the drum 12 and continues at about 930 rpm without further increasing the rotational speed of the drum 12 for the remaining dehydration time of intermediate dehydration. Rotation proceeds to dehydration (450).

The controller 140 proceeds with dehydration at about 930 rpm or about 1200 rpm, and when the set dehydration time ends (460), the intermediate dehydration is terminated.

Hereinafter, the dehydration stroke shown in FIG. 3 will be described in detail with reference to FIG. 5.

When the dehydration stroke is started, the control unit 140 rotates the drum 12 at about 930 rpm to dehydrate the laundry (510).

If the dehydration time remains about 4 minutes (520), the controller 140 checks whether the eccentricity is detected (530).

If the eccentricity is not detected, the control unit 140 rotates the drum 12 at about 1200 rpm for the remaining dehydration time of the dehydration stroke so that laundry can be better dehydrated (540).

On the other hand, if the eccentricity is detected, the controller 140 determines that the eccentricity has occurred due to the high rotational speed of the drum 12 and continues at about 930 rpm without further increasing the rotational speed of the drum 12 for the remaining dehydration time of the dehydration stroke. Rotation proceeds to dehydration (550).

The controller 140 proceeds with dehydration at about 930 rpm or about 1200 rpm, and when the set dehydration time ends (560), the dehydration stroke is terminated.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 9.

In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and description is abbreviate | omitted.

FIG. 6 is a control configuration diagram of the washing machine according to the second embodiment of the present invention. As shown in FIG. 6, the input unit 600 is connected to the input side of the controller 640 for controlling overall operation of the washing machine. The input unit 600 is provided with various buttons to directly receive the operation information, such as the type of laundry, washing course, washing temperature, the rotational speed of the drum during the dehydration stroke, rinse addition, in particular, the input unit 600 is a standard The washing course button 603 is provided.

The control unit 640 is set to a standard washing course for automatically washing according to a predetermined algorithm. The control unit 600 increases the rotational speed of the drum 12 in multiple stages according to the capacity of the washing machine (for example, product capacity and motor capacity) when performing the intermediate dehydration and dehydration stroke of the standard washing course (first rotational speed). -> Second rotational speed → third rotational speed). That is, if the washing machine has a capacity of 10KG, the drum 12 is rotated at 800rpm-> 1100rpm-> 1400rpm when the intermediate dehydration and dehydration stroke is performed. If the washing machine has a capacity of 12KG, the drum 12 is performed during the intermediate dehydration and dehydration stroke. It is set to rotate from 900rpm-> 1200rpm-> 1400rpm. As such, as the rotational speed of the drum 12 is increased step by step, the centrifugal force acting on the laundry located inside the drum 12 becomes larger, whereby residual detergent and water absorbed in the laundry are removed from the laundry. Better separation.

On the other hand, the control unit 640 is the rotational speed of the drum 12 to reduce the eccentricity caused by the increase in the centrifugal force of the drum 12 as the rotational speed of the drum 12 increases during the intermediate dewatering and dewatering stroke Lower is set to rotate the drum 12 for a long time. That is, the longest time that the drum 12 is rotated at the first rotational speed, which is the lowest speed at the time of performing the intermediate dewatering and dehydration stroke, and then the longest time that the drum 12 is rotated at the second rotational speed, and last As a result, the rotation time of the drum 12 at the third rotational speed is set to be the shortest. This is because the centrifugal force of the drum 12 and thus the eccentricity are reduced in proportion to the weight of the laundry in the drum 12 and the water absorbed by the laundry, and the rotational speed of the drum 12 to reduce the centrifugal force of the drum 12. To do so. That is, as the drum 12 is rotated for the longest time at a low speed, most of the water absorbed by the laundry inside the drum 12 is discharged to the outside of the drum 12 so as to rotate the drum 12. Reduce the centrifugal force generated. Accordingly, even if the rotational speed of the drum 12 is increased, the weight of the water absorbed by the laundry in the drum 12 is greatly reduced, and the amount of centrifugal force increase of the drum 12 is prevented, thereby reducing the possibility of eccentricity.

On the other hand, the rotation of the drum 12 is typically preferably rotated for a long time at 1000rpm or less to prevent eccentricity. However, if the first and second rotational speeds of the drum 12 are both 1000 rpm or less (for example, the first rotational speed is 700 rpm and the second rotational speed is 900 rpm), then the first rotational speed of the drum 12 is reduced. And the time for rotating at the second rotational speed may be set longer than the time for driving the drum 12 at the second rotational speed according to the capacity of the product and the motor capacity.

Hereinafter, a method of controlling a washing machine according to a second embodiment of the present invention will be described in detail with reference to FIGS. 7 to 9.

7 is a flowchart illustrating a control method of a washing machine according to a second embodiment of the present invention. When the washing course starts in FIG. 7, the control unit 640 agitates the drive motor 30 from side to side and detects the weight of the laundry inside the water tank. Then, the control unit 640 supplies water to the water tank 11 until the water level of the water in the water tank 11 is a proper level according to the weight of the laundry detected, and performs a washing stroke when the proper water level is reached (700). .

When the washing process is completed, the control unit 640 drains the water in the water tank 11 (705) and performs an intermediate dehydration step (710). This intermediate dehydration will be described in detail with reference to FIG. 8 below.

When the intermediate dehydration is completed, the control unit 640 starts a rinsing stroke (715).

The controller 640 supplies water into the water tank 11 according to the weight of the laundry. At this time, the amount of water is supplied to the water at a certain ratio (approximately 80%) of the appropriate amount of water in the rinsing stroke according to the weight of the laundry (720).

When the water supply is completed, the control unit 640 proceeds to the N-th rinse (725).

When the rinsing time of the ongoing rinsing is finished (730), the controller 640 drains the water in the water tank 11 (735), and determines whether all of the preset rinsing times have been performed (740).

If all of the preset rinsing cycles have not been performed, the control unit 640 performs intermediate dehydration, and returns to step 720 to supply water to the water tank 11 and proceed with the next rinsing cycle (745).

On the other hand, if all of the predetermined number of rinsing is performed, the control unit 640 ends the rinsing stroke (750).

In addition, the control unit 640 performs the dehydration stroke 755 to end the water saving laundry course, which will be described in detail with reference to FIG. 9 below.

Hereinafter, the intermediate dehydration shown in FIG. 7 will be described in detail with reference to FIG. 8.

When the intermediate dehydration is started, the control unit 640 rotates the drum 12 at a first rotational speed for about 2 minutes 30 seconds (800).

The controller 640 checks whether the eccentricity is detected after about 2 minutes and 30 seconds (810).

If the eccentricity is not detected, the controller 640 increases the rotational speed of the drum 12 to a second rotational speed higher than the first rotational speed and rotates the drum 12 for about 1 minute and 30 seconds to further dehydrate the laundry. Make it work (820).

The controller 640 checks whether the eccentricity is detected again after about 1 minute and 30 seconds (830).

If the eccentricity is not detected, the control unit 640 increases the rotational speed of the drum 12 to a third rotational speed higher than the second rotational speed and rotates the drum 12 for about 1 minute so that the laundry is dehydrated better. (840), the intermediate dehydration is terminated after about 1 minute.

On the other hand, if the eccentricity is detected in step 810, the control unit 640 determines that the eccentricity has occurred due to the high rotational speed of the drum 12, and does not increase the rotational speed of the drum 12 any more during the remaining dehydration time of intermediate dehydration. The water is kept dehydrated at a first rotational speed (850).

In addition, if the eccentricity is detected in step 830, the controller 640 determines that the eccentricity has occurred due to the high rotational speed of the drum 12, and does not increase the rotational speed of the drum 12 any more during the remaining dehydration time of intermediate dehydration. The water is kept dehydrated at a second rotational speed (860).

Hereinafter, the dehydration stroke shown in FIG. 7 will be described in detail with reference to FIG. 9.

When the dehydration stroke is started, the control unit 640 rotates the drum 12 at a first rotational speed for about 8 minutes to dehydrate the laundry (900).

The controller 640 checks whether eccentricity is detected after about 8 minutes (910).

If the eccentricity is not detected, the control unit 640 increases the rotational speed of the drum 12 to a second rotational speed higher than the first rotational speed to rotate the drum 12 for about 5 minutes to achieve better dehydration of the laundry. It is possible to lose (920).

The controller 640 checks whether the eccentricity is detected again after about 5 minutes (930).

If the eccentricity is not detected, the control unit 640 increases the rotational speed of the drum 12 to a third rotational speed higher than the second rotational speed to rotate the drum 12 for about 2 minutes to achieve better dehydration of the laundry. (940), and the dehydration stroke is terminated after about 2 minutes.

On the other hand, if the eccentricity is detected in step 910, the control unit 640 determines that the rotational speed of the drum 12 is high, so that the rotational speed of the drum 12 is no longer increased for the remaining dehydration time of the intermediate dehydration. Dehydration is continued by maintaining the first rotational speed, and when the remaining time of the dehydration stroke has elapsed, the dehydration stroke is terminated (950).

In addition, if the eccentricity is detected in step 930, the controller 640 determines that the eccentricity has occurred due to the high rotational speed of the drum 12 and does not increase the rotational speed of the drum 12 any more during the remaining dehydration time of intermediate dehydration. The dehydration is continued by maintaining the second rotational speed, and when the remaining time of the dehydration stroke has elapsed, the dehydration stroke is terminated (960).

1 is a cross-sectional view showing the configuration of a washing machine according to an embodiment of the present invention.

2 is a view showing a control configuration of a washing machine according to a first embodiment of the present invention.

3 is a flowchart illustrating a control method of a washing machine according to a first embodiment of the present invention.

4 is a flow chart showing in detail the intermediate dehydration shown in FIG.

FIG. 5 is a flowchart showing the dehydration stroke shown in FIG. 3 in detail.

6 is a view showing a control configuration of a washing machine according to a second embodiment of the present invention.

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

8 is a flow chart showing in detail the intermediate dehydration shown in FIG.

9 is a flowchart showing the dehydration stroke shown in FIG. 7 in detail.

Explanation of symbols on the main parts of the drawings

11: tank 12: drum

14 door 20 water supply

24, 27: water supply valve 22, 23, 25, 28: water supply pipe

30: drive motor 40: drainage

100,600: input unit 103,603: standard washing course button

106: water saving washing course button 110: eccentric detection unit

120: water level detection unit 140,640: control unit

160: drive unit 180: load

Claims (18)

Determining whether it is a water saving course; A washing machine comprising dehydrating the water saving course by increasing the rotational speed of the drum when the water saving course is dewatered to a first rotational speed higher than the rotational speed when dewatering the other washing course. Control method. The method of claim 1, wherein the dewatering of the water saving course, Rotate the drum at the first rotational speed for a preset time; And the drum is rotated at a second rotational speed higher than the first rotational speed for a time shorter than the time for rotating the drum at the first rotational speed. The method of claim 2, And rotating the drum at the first rotational speed for the preset time, and continuously rotating the drum at the first rotational speed for the remaining dehydration time of the water saving course when eccentricity is detected. The method of claim 1, The control method of the washing machine to supply the amount of water supplied when performing the rinsing stroke of the water saving course less than the amount of water supplied when performing the rinsing stroke of the other washing course. The method of claim 1, And if the washing stroke of the water saving course remains for the first time, increasing the rotation speed of the drum to a rotation speed of the washing stroke to rotate the drum. The method of claim 5, wherein Control of the washing machine repeating the operation of stopping the drum for a third time longer than the second time after rotating the drum for a second time by increasing the rotation speed of the drum to a rotation speed of the washing stroke when the first time remains. Way. The method of claim 1, The dehydration of the water saving course is a control method of the washing machine is intermediate dewatering of the washing stroke and rinsing stroke. The method of claim 1, The dewatering of the water saving course is a control method of the washing machine is dehydration performed in the dehydration stroke. Determining whether dehydration starts; When the dehydration starts, the drum is rotated at a first rotational speed for a preset time, and then at a second rotational speed higher than the first rotational speed for a time shorter than the time for rotating the drum at the first rotational speed. The control method of the washing machine comprising the step of performing the dehydration. The method of claim 9, And if the washing stroke has a first time remaining, increases the rotational speed of the drum than the rotational speed of the washing stroke to rotate the drum. The method of claim 10, A washing machine repeating the operation of stopping the drum for a third time longer than the second time after the drum is rotated for a second time at a rotational speed increased from the rotational speed of the washing stroke if the first time remains. Control method. The method of claim 9, And rotating the drum at the first rotational speed for the preset time, and continuously rotating the drum at the first rotational speed for the remaining dehydration time if eccentricity is detected. The method of claim 9, And a supply amount of water in the rinsing stroke is an amount reduced by a predetermined ratio from the supply amount of water based on the weight of the laundry in the drum. The method of claim 9, The dehydration is a control method of the washing machine is dehydration is performed in the water saving course. The method of claim 14, And the first rotational speed of the drum is a rotational speed higher by a predetermined ratio than the rotational speed of the drum when dewatering in a standard course. The method of claim 9, The dehydration is a control method of the washing machine is the intermediate dewatering of the washing stroke and rinsing stroke. The method of claim 9, The dehydration is a control method of the washing machine is dehydration is performed in the dehydration stroke. The method of claim 7, wherein The dehydration is a control method of the washing machine is dehydration is performed in the intermediate dewatering and dewatering stroke of the washing and rinsing stroke.

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