KR101611279B1 - Controlling Method of Washing Machine - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a control method of a washing machine, and more particularly, to a control method of a washing machine that is convenient to use by various drum driving motions and can satisfy various consumer demands.

According to the present invention, there is provided a control method of a washing machine for performing a rinsing cycle including a rinsing step of rinsing laundry by supplying washing water to a tub or a drum, and a drain step of draining washing water, Wherein the drum driving motion is repeated in which the laundry is lifted and then dropped in the drum driving motor.

Washing machine, drum driving motion, washing course, washing cycle, rinse cycle, dehydration cycle

Description

[0001] The present invention relates to a control method of a washing machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a control method of a washing machine, and more particularly, to a control method of a washing machine that is convenient to use by various drum driving motions and can satisfy various consumer demands.

Generally, a washing device is a device for removing dirt buried in laundry through the action of water and a detergent.

The washing machine is roughly classified into a stirring type, a vortex type and a drum type washing machine.

In the agitation type, the washing rods rising in the center of the washing tub are washed by rotating the washing rods to the left and right, and the swirl type washing is performed by using the frictional force between the water and the laundry to rotate the disk- Put the water, detergent and laundry in the drum and wash it.

The drum type washing machine includes a tub having an inside of a cabinet forming an outer appearance, a tub accommodating washing water, a drum accommodating the laundry in the tub, and a motor and a shaft for rotating the drum are provided on a rear surface of the tub .

The drum type washing machine having the above-described structure removes the dirt contained in the laundry by the chemical action of the detergent stored in the washing water, the frictional force of the laundry stored in the drum, and the laundry water stored in the tub.

Therefore, the combination of the rotational direction and the rotational speed of the drum is closely related to the washing performance of the washing machine.

Meanwhile, since the drum is supplied with power from the motor provided on the rear surface of the tub, the combination of the rotational direction and the rotational speed of the drum, which is designed to improve the washing performance of the washing machine, must take into account the load on the motor.

In the case of the drum washing machine, as the drum rotates, the laundry inside the drum flows and is washed. It is generally known that the damage of laundry in a drum washing machine is less than that of agitation type or vortex type.

In the conventional drum type washing machine, washing and rinsing were carried out by tumble driving in which the laundry in the drum was lifted and dropped. Such tumble driving is a type of sucking laundry by tapping softly. As a result, the laundry is washed in a specific form, so that there is a limit to improvement in washing performance.

In addition, the washing cycle includes various steps such as water supply, detergent dissolution, spraying, or heating as well as the main washing step. In this step, tumble driving is uniformly performed, and a certain limit is imposed on the efficiency improvement and the time saving in each step Inevitably.

In addition, since the space inside the drum is constant in the tumble driving, there is a problem that the washing efficiency can not be changed according to the amount of the drum. The reason for this is that because the laundry is knocked on the laundry, the mechanical power applied to the laundry is inevitably changed.

In addition, the need for improvement in efficiency and time saving in the washing and rinsing and dehydrating operations can not be overemphasized. That is, the same is true not only in a course in which these strokes are combined, but also when one stroke is independent.

An object of the present invention is to provide a control method of a washing machine capable of improving washing efficiency and reducing washing time.

More particularly, it is an object of the present invention to provide a control method of a washing machine which can improve the washing efficiency and reduce the time required for washing, rinsing and dewatering which are performed independently or as part of a course.

It is another object of the present invention to provide a control method of a washing machine which can meet the demand of a user by improving the washing efficiency and shortening the required time by varying the drum driving motions in each of the detailed steps performed in the washing cycle .

It is another object of the present invention to provide a control method for a washing machine, which improves the washing efficiency and shortens the time required for washing regardless of the laundry amount, thereby improving reliability.

An object of the present invention is to provide a control method of a washing machine capable of shortening the time required for the rinsing and dewatering strokes and removing the remaining detergent from the laundry as much as possible to enhance the satisfaction of the user.

It is an object of the present invention to provide a control method of a washing machine in which the efficiency in a washing cycle, a rinse cycle and a dewatering cycle is enhanced, and efficiency in a washing course is also enhanced by combining these processes.

According to an aspect of the present invention, there is provided a method of controlling a washing machine including a water supply step of supplying washing water and a detergent to a tub or a drum to dissolve the detergent in washing water, (Drum driving motion) in which the laundry flows in the drum controls the driving of the drum so as to include step motion, thereby performing the detergent dissolution promotion step.

Here, the water supply step is a step in which wash water is supplied from the outside to the inside of the washing machine and supplied to the drum or tub together with the detergent to be completed. Therefore, the water supply step may be a preliminary step performed before the main washing step in which washing is performed in the drum in earnest. The step of accelerating the dissolution of detergent may be performed such that the detergent is uniformly mixed with the washing water in the initial stage of the water supply step.

In the detergent dissolution facilitating step, the drum driving motion may include scrub motion. In the detergent dissolution promotion step, the drum driving motion may be performed in a sequential combination of the step motion and the scrub motion. That is, the scrub motion may be performed after the step motion is performed for a predetermined time. The step motion and the scrub motion may be repeated a predetermined number of times.

Since the step motion and the scrub motion are motions in which the drums stop rapidly after rotating, the flow direction of the laundry is rapidly changed. Therefore, it can be said that a strong impact force is applied to the laundry. In addition, such a motion is a motion that applies a strong impact force to washing water. Furthermore, the flow pattern of the laundry and the flow pattern of the washing water can be changed by the combination of the step motion and the scrub motion. Accordingly, the detergent is rapidly dissolved in the washing water, so that the time required for dissolving the detergent can be shortened, thereby improving the washing efficiency.

Here, the braking of the drum is preferably a reverse phase braking which applies a torque in a direction opposite to the rotating drum. This makes it possible to switch the flow direction of the laundry more rapidly.

In the meantime, a step of determining whether the supplied detergent is a liquid detergent or a powder detergent by rotating the drum at the beginning of the water supply step may be performed. This can be said to be a step performed to determine the drum driving motion or the number of times of rinsing in the rinsing cycle which can be performed after the washing cycle is completed. It is preferable that the matters related to the washing and rinsing operations are displayed to the user at the beginning of the driving of the washing machine. Therefore, it is preferable that the step of judging the type of the detergent is performed at the beginning of water supply, particularly before the step of promoting dissolution of the detergent.

In the detergent dissolution promotion step, a circulation step of circulating the washing water in the tub and re-supplying the washing water into the drum may be performed. In the case of a drum type washing machine, the laundry is completely immersed in the washing water, so washing is not performed. Therefore, it is more preferable that the circulation step is performed to uniformly supply the washing water in which the detergent is dissolved to the laundry. Of course, this circulation step is to supply the washing water outside the lower portion of the drum to the inside of the drum, thereby flowing the washing water as a whole. Therefore, it is more advantageous in promoting dissolution of detergent.

After the step of accelerating the dissolution of detergent, a step of promoting the seeding may be performed. This step can be performed after a certain number of watering steps have been performed and until the watering step has ended.

In some detergent dissolution promoting steps, a part of the dead space is formed, and the washing water level rises and the washing water is accumulated in the drum. Therefore, it is preferable that a step of further accelerating the seeding is performed. The drum driving motion in the step of accelerating the seeding can be controlled unlike the step of promoting dissolution of the detergent.

The drum driving motion in the step of expelling the spot may include rolling motion. In addition, the drum driving motion in the seeding promoting step may include a filtration motion. These filtration motions and rolling motions may be performed in order.

Meanwhile, the drum driving motion in the washing cycle can be controlled to vary depending on the amount of laundry in the drum, that is, the laundry amount. More specifically, the drum driving motion in the water supply step can be controlled so as to vary depending on the amount of discharged water. In order to accomplish this, a step of determining the amount of discharged water in the drum before the water supply step is performed may be performed. Such a determination of the amount of waste can be performed by measuring the current required to rotate the drum. For example, it can be performed by measuring a current required while performing tumble motion.

The detergent dissolution promotion step may be controlled so as not to be performed when the amount of the laundry determined in the detachment determination step is equal to or greater than a predetermined detergent level. That is, the detergent dissolution promotion step may be controlled to be performed when the detergent dissolution promotion step is performed at a predetermined levitation level or lower. This is because the drum-driven motion that supplies the mechanical force is more effective in the case of a small amount of the laundry, and the laundry is sufficiently contacted with the washing water because of a small amount of laundry. On the other hand, in the case of a large quantity of the laundry, the mechanical strength may not be sufficient, and laundry may not be in contact with the washing water sufficiently.

Therefore, when the amount of the laundry is equal to or higher than the predetermined amount of the laundry, the step of promoting dissolution of the detergent may be omitted and the step of accelerating the step of expelling the soap may be performed immediately. It is more preferable that the laundry is brought into contact with the washing water sufficiently when the laundry is at a predetermined level or more, thereby further promoting dissolution of the detergent. To this end, the circulation step of circulating the washing water in the tub and supplying the washing water to the inside of the drum is performed in the water supplying step.

It is preferable that the drum driving motion is controlled so as to include the filtering motion in the step of accelerating the seedling. This tilting motion as well as the filtering motion can be performed. That is, the washing water is supplied by widening the surface area of the laundry through the filtration motion, and the laundry is uniformly dispersed without tangling through the tumbling motion, so that the laundry can be supplied evenly to the laundry.

The washing step includes a main washing step, and a heating step of heating the inside of the drum to prepare the main laundry may be performed between the main washing step and the water supplying step.

Here, the heating step is a step of heating the washing water through the heater provided in the lower part of the tub, or supplying the steam into the drum to raise the temperature of the washing water or the temperature inside the drum. Thus, the heating step may be performed or omitted as needed.

The heating step may include a heating preparation step for heating preparation after the water supply step.

After the watering stage, it can be said that the spraying is completed. Therefore, it is possible to determine a more accurate quantity after the water supply step. The reason for this is that the post mortem is closer to the actual post mortem than to the previous post mortem. For example, there is a problem that wet laundry is judged to be larger than the actual amount of laundry before it is dried.

Therefore, in the heating step or the heating preparation step, it is possible to perform the precise amount determination step before the main washing. In the case where the heating step is omitted, the step corresponding to the heating preparation step may be performed for determining the amount of fine particles.

The drum driving motion in the main washing step may be performed in an order combination of step motion, tumble motion and rolling motion. In addition, the drum driving motion in the main washing step may be performed in a sequential combination of a filtration motion and a tumble motion.

More preferably, the drum driving may be controlled so that the drum driving motion in the main washing step varies depending on the amount of laundry. In this case, the amount discharged may be the volume determined before the water supply, and may be the volume determined before the main washing after the water supply.

When the amount of the drum is equal to or greater than a predetermined drum-level, the drum-driving motion is preferably performed including a filtration motion. Preferably, the drum driving motion is performed including step motion when the amount of the laundry is less than a predetermined empty amount level.

The present invention also provides a method of controlling a washing machine that performs a rinsing cycle including a rinsing step of supplying washing water to a tub or a drum to rinse laundry and a drain step of draining the washing water, Wherein the drum driving motion is repeated in which the laundry is lifted and then dropped in the drum in the drainage step.

Here, the rinsing cycle may be performed independently, and may be performed as one washing cycle together with the above-described washing cycle.

According to another aspect of the present invention, there is provided a control method for a washing machine that performs a washing cycle including a washing cycle and a rinsing cycle, wherein the washing cycle includes a step of rotating the drum to determine a replenishment amount in the drum, Accordingly, the drum driving motion is performed differently in the rinsing step of the rinsing cycle.

According to the present invention, there is provided a washing machine capable of improving washing efficiency and reducing washing time.

More specifically, it is possible to provide a washing machine capable of improving washing efficiency in a washing cycle performed independently or in a part of a course and reducing the time required.

According to the present invention, it is possible to provide a washing machine which improves the washing performance irrespective of the laundry amount and shortens the time required to improve the reliability. In addition, it is possible to visually provide satisfaction to the user by varying the drum driving motions in each of the detailed steps performed in the washing cycle.

According to the present invention, it is possible to provide a washing machine that can optimize a standard course having the highest frequency of use by a user, thereby enhancing the user's satisfaction with various clothes.

According to the present invention, it is possible to provide a washing machine capable of shortening the time required for the rinsing and dewatering strokes and removing the residual detergent from the laundry as much as possible to enhance the satisfaction of the user.

According to the present invention, it is possible to provide a washing machine which improves the efficiency in each of the washing, rinsing and dewatering stages, while improving the efficiency in the washing course in which these strokes are performed in combination.

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

Unless defined otherwise, all terms herein are the same as the general meaning of the term as understood by one of ordinary skill in the art to which this invention belongs, and if the terms used herein conflict with the general meaning of the term Are as defined herein.

It is to be understood that the present invention is not limited to the details of the embodiments described below, .

1 is a perspective view of a washing machine to be controlled by the washing machine of the present invention.

The washing machine includes a cabinet 110 forming an outer appearance, a tub 120 provided in the cabinet and supported by the cabinet, a drum 130 rotatably installed in the tub and into which laundry is introduced, A motor 140 for applying a torque to the drum to rotate the drum, and a control panel 115 for allowing the user to select and execute a washing course.

The cabinet 110 includes a main body 111, a cover 112 attached to a front surface of the main body, and a top plate 116 coupled to an upper portion of the main body. The cover 112 may include an opening 114 that allows the laundry to enter and exit, and a door 113 that selectively opens and closes the opening.

The drum 130 forms a space for washing the laundry. The drum 130 is rotated by receiving power from the motor 140. Since the drum 130 has a plurality of through holes 131, the washing water stored in the tub 120 can be introduced into the drum 130 through the through holes 131, The number can be leaked to the turbine. Therefore, when the drum rotates, the laundry introduced into the drum is removed from the washing water in the process of rubbing against the washing water stored in the tub.

The control panel 115 is a configuration that allows a user to input information related to washing, as well as to confirm information relating to washing. That is, it is a configuration for interfacing with a user.

Accordingly, the control panel 115 includes an operation unit 117 and 118 for allowing a user to input a control command, and a display unit 119 for displaying control information according to the control command. The control panel may include a controller for controlling the operation of the washing machine including the operation of the motor according to the control command.

According to the control method of the washing machine of the present invention, the drum can be driven in various forms. That is, drum driving is performed in various forms as well as general tumble driving and spin driving. The tumble driving is a drum driving motion in which a laundry is lifted after the laundry is rinsed or rinsed in a general drum washing machine, and the spin driving is a drum driving motion in which the laundry continues to rotate while being attached to the inside of the drum.

The drum driving motion in the present invention means the RPM in which the drum rotates, as well as the motion in which the laundry flows in the drum. Accordingly, the present invention provides a method of controlling a motor that generates rotation of a drum, particularly a drum, for driving the drum in various drum driving motions.

Hereinafter, various drum driving motions that can be applied to the embodiment of the present invention will be described in detail.

2 is a view showing various drum driving motions used in a control method of the washing apparatus of the present invention.

The drum driving motion means a combination of the rotating direction and the rotating speed of the drum. The laundry moving in the drum moves in the falling direction and the falling time point of the drum, and therefore the flow of the laundry in the drum is different . The drum driving motion is implemented by controlling the motor.

Since the laundry is raised by the lift 135 provided on the inner peripheral surface of the drum when the drum rotates, the shock applied to the laundry can be changed by controlling the rotating speed and the rotating direction of the drum. That is, the mechanical force such as friction between laundry, friction between laundry and washing water, and falling impact of laundry can be different. In other words, the laundry can be knocked or rubbed for washing, and the laundry can be dispersed or turned upside down at different degrees.

Accordingly, it is an object of the present invention to provide a control method for a washing machine having various drum driving motions, and to provide a control method of a washing machine having various drum driving motions by varying drum driving motions according to the type of laundry, the contamination degree of laundry, So that the laundry can be processed by the mechanical force of the washing machine. This makes it possible to improve the washing efficiency of the laundry. In addition, it is possible to prevent an excessive washing time from being consumed due to the consistent drum driving motion, thereby reducing the time required.

Meanwhile, in order to realize the various drum driving motions, the motor 140 is preferably a direct drive type motor. That is, it is preferable that the stator of the motor is fixed to the rear of the tub 120 and the rotor of the motor rotates to drive the drum 120 directly. This is because, by controlling the rotation direction, the torque, and the like of the motor, it is possible to instantaneously control the drum driving motion by preventing time delay or backlash as much as possible.

On the other hand, in the case of transmitting the rotational force of the motor to the rotating shaft through a pulley or the like, drum driving motions in which time delay or backlash is allowed, for example, tumbling driving or spinning driving, etc., will be possible. Therefore, it becomes undesirable to realize various drum driving motions. The driving mode of the motor and the drum is obvious to those skilled in the art and thus a detailed description thereof will be omitted.

Fig. 2 (a) is a view showing a rolling motion. The rolling motion is a motion in which the motor 140 rotates the drum 140 in one direction and the laundry on the inner circumferential surface of the drum is controlled to drop to a lowest point of the drum at a position less than about 90 degrees in the rotational direction of the drum.

That is, when the motor 140 rotates the drum at about 40 RPM, the laundry located at the lowest point of the drum 140 rises a predetermined height along the rotating direction of the drum 140, So as to roll to the lowest point of the drum. Visually, when the drum rotates clockwise, the laundry continuously rolls in the third quadrant of the drum.

The laundry is washed through the rolling motion by friction with the washing water, friction between the laundry, and friction with the inner surface of the drum. In addition, the sweeping of the laundry is sufficiently generated through the motion, so that the laundry can be smoothly rubbed.

Here, the drum RPM is determined in relation to the radius of the drum. That is, as the RPM of the drum becomes larger, centrifugal force is generated in the laundry in the drum. The flow of the laundry in the drum changes due to the difference in magnitude between the centrifugal force and the gravity. Of course, the rotational force of the drum and the friction between the drum and the laundry must also be considered.

Therefore, the RPM of the drum is determined so that the centrifugal force and the frictional force are less than the gravitational force (1G).

Figure 2 (b) shows a tumbling motion.

The tumbling motion is a motion in which the motor 140 rotates the drum 130 in one direction so that the laundry on the inner circumferential surface of the drum falls to the lowest point of the drum at a position of about 90 to 110 degrees in the rotating direction of the drum. The tumbling motion is drum driving motion which is generally used in washing and rinsing since a mechanical force is generated only by controlling the drum to rotate in one direction with an appropriate RPM.

That is, the laundry loaded into the drum 140 is positioned at the lowest point of the drum 130 before the motor 140 is driven. When the motor 140 provides a torque to the drum 130, the drum 130 rotates, and the lift 135 provided on the inner circumferential surface of the drum moves the laundry to a predetermined height from the lowest point in the drum . If the motor 140 rotates the drum 140 by about 46 RPM, the laundry falls from the lowest point of the drum to the lowest point of the drum at a rotation angle of about 90 to 110 degrees.

The tumbling motion determines the RPM of the drum so that centrifugal force is generated rather than centrifugal force in rolling motion, but less than gravity.

Visually, the tumbling motion is such that when the drum rotates clockwise, it moves from the third quadrant to the second quadrant at the lowest point of the drum, then falls off the inner periphery of the drum and falls to the lowest point of the drum.

Accordingly, the tumbling motion allows the laundry to be washed by the impact force caused by the friction with the wash water and the falling water, so that the laundry is rinsed and rinsed with a mechanical force greater than the mechanical force in the rolling motion. In addition, since it is a motion to fall to some extent from the inside of the drum, there is an effect of separating the entangled laundry and dispersing the laundry.

Fig. 2 (c) is a view showing a step motion. The step motion is a motion in which the motor 140 rotates the drum 130 in one direction so that the laundry on the inner circumferential surface of the drum falls down to the lowest point of the drum at the highest rotational point of the drum (about 180 degrees).

When the motor 140 rotates the drum 130 by about 60 RPM or more, the laundry can be rotated without falling due to the centrifugal force. In the step motion, the laundry is rotated at a speed at which the laundry does not fall off the inner peripheral surface of the drum due to the centrifugal force. The drum is rotated, and then the drum is rapidly braked to maximize the impact force on the laundry.

In the step motion, the motor 140 rotates the drum at a speed (about 60 RPM or more) at which the laundry does not fall off the outer circumferential surface of the drum due to the centrifugal force. When the laundry is located near the highest point of the drum And is controlled to supply the reverse torque to the drum 130. [

Accordingly, the laundry rises along the rotational direction of the drum at the lowest point of the drum 130 and falls to the lowest point at the highest point of the drum 130 as the drum stops due to the reverse torque of the motor 140, Is a motion that is washed by the impact force generated in the course of the laundry falling in the drum falling to a maximum falling level. The mechanical force generated by such step motion becomes larger than the above-described rolling motion or tumbling motion.

Visually, the step motion is such that when the drum rotates clockwise, it moves from the third quadrant to the highest point of the drum from the third quadrant to the highest point of the drum, and suddenly falls off the inner periphery of the drum and falls to the lowest point of the drum. Therefore, since the distance of falling from the inside of the drum in the step motion is the largest, it is possible to more effectively provide the mechanical force when the amount is small.

Meanwhile, the motor 140 is preferably reverse-phase braked for braking the drum. The reverse phase braking is a method of generating a rotational force in a direction opposite to the direction in which the motor is rotating, thereby braking the motor. The phase of the current supplied to the motor can be reversed in order to induce a rotational force in a direction opposite to the direction in which the motor is rotating, and the reverse phase braking enables rapid braking of the motor. Therefore, the reverse phase braking is the most suitable braking method for the step motion in which strong impact is given to laundry.

Thereafter, the motor 140 again applies torque to the drum 130 to raise the laundry at the lowest point of the drum to the highest point. That is, a step motion is implemented by applying a torque so as to rotate clockwise and then instantaneously counterclockwise by applying a torque, and then applying a torque to rotate clockwise again.

As a result, the step motion is a motion in which the washing water and the laundry that have flowed into the through hole 131 are washed by rubbing the laundry while rotating the drum, and the laundry is dropped when the laundry is located at the highest point of the drum.

Fig. 2 (d) is a view showing a swing motion. The swing motion is a motion in which the motor 140 rotates the drum 130 in both directions and the laundry falls down at a position less than about 90 degrees in the rotating direction of the drum.

That is, when the motor 140 rotates the drum 130 counterclockwise at about 40 RPM, the laundry located at the lowest point of the drum 130 is raised counterclockwise by a predetermined height. At this time, the motor stops the rotation of the drum before the laundry reaches the position of about 90 degrees in the counterclockwise direction of the drum so that the laundry moves in the direction of the lowest point of the drum at a position less than about 90 degrees counterclockwise of the drum.

Thereafter, the motor 140 rotates the drum 130 clockwise at about 40 RPM to cause the falling laundry to rise in a clockwise direction along the rotating direction of the drum. Meanwhile, the motor 140 stops the rotation of the drum before the laundry reaches the position of about 90 degrees in the clockwise direction of the drum, so that the laundry falls in the direction of the lowest point of the drum at a position less than about 90 degrees in the clockwise direction of the drum.

That is, the swing motion is a motion in which the one-way rotation and the stop of the drum and the reverse rotation and stop are repeated, and visually, the laundry rises from the third quadrant of the drum to the second quadrant and smoothly falls, And it is a form of repeatedly dropping smoothly.

At this time, the braking of the motor 140 minimizes the load generated in the motor 140 by using the power generation braking, minimizes the mechanical wear of the motor 140, and adjusts the impact applied to the laundry.

The power generation braking is a braking system that uses a motor to serve as a generator due to rotational inertia when a current to be applied to the motor is turned off. When the current applied to the motor is turned off, the direction of the current flowing through the coil of the motor is opposite to the direction of the current before the power is turned off, so the force (right hand rule of Flemming) acts in the direction that interferes with the rotation of the motor. Unlike the reverse braking, the power generation braking smoothes the rotation direction of the drum without braking the motor.

Thus, visually, the swing motion becomes a form in which the laundry flows in an eight-letter form lying sideways over the third quadrant and the fourth quadrant of the drum.

FIG. 2 (e) is a view showing a scrub motion. The scrub motion is a motion in which the motor 140 rotates the drum 130 in both directions and is controlled such that laundry is dropped at a position of about 90 degrees or more in the rotational direction of the drum.

That is, when the motor 140 rotates the drum 130 counterclockwise at about 60 RPM or more, the laundry located at the lowest point of the drum 130 is raised in a counterclockwise direction by a predetermined height. At this time, the motor provides a reverse torque to the drum after the laundry passes the position of about 90 degrees counterclockwise of the drum, thereby temporarily stopping the rotation of the drum. Then, the laundry on the inner circumferential surface of the drum drops rapidly.

Then, the motor 140 rotates the drum clockwise at about 60 RPM to raise the dropped laundry in the clockwise direction by a predetermined height. The motor 140 provides a reverse torque to the drum 130 when the laundry passes the position of 90 degrees in the clockwise direction of the drum, thereby temporarily stopping the rotation of the drum. Thus, the laundry on the inner circumferential surface of the drum falls to the lowest point of the drum at a position of 90 degrees or more in the clockwise direction of the drum.

Accordingly, the scrubbing motion causes the laundry to be washed down by allowing the laundry to drop rapidly at a predetermined height. Meanwhile, the motor 140 is preferably reverse-phase braked for braking the drum.

The rotating direction of the drum is rapidly changed so that the laundry does not deviate greatly from the inner circumferential surface of the drum, and the effect of rubbing very strongly is obtained. In the scrub motion, the laundry which has moved to the second quadrant through the third quadrant falls rapidly, then moves again to the quadrant of the fourth quadrant, and then drops. Thus, the visually ascending laundry may be repeatedly lowered along the inner circumferential surface of the drum.

Fig. 2 (f) is a diagram showing filtration motion. The filtration motion is a motion in which the motor 140 rotates the drum 130 so that the laundry is not separated from the inner circumferential surface of the drum by the centrifugal force, and the wash water is sprayed into the drum.

That is, since the filtration motion spreads the washing water into the drum while the laundry is spread on the inner circumferential surface of the drum after the laundry is unfolded, the washing water is transferred to the tub 120 through the through holes 131 of the laundry and drum by the centrifugal force . Therefore, the filtration motion widenes the surface area of the laundry, and allows the laundry to penetrate through the laundry, so that the washing water can be supplied to the laundry evenly.

FIG. 2 (g) is a diagram showing a squeeze motion. The squeeze motion repeats the operation of rotating the drum 130 by the motor 140 so that the laundry is not separated from the inner circumferential surface of the drum by the centrifugal force, lowering the rotational speed of the drum 130 to separate the laundry from the inner circumferential surface of the drum , And the washing water is sprayed into the drum during the rotation of the drum.

That is, although the filtration motion is continuously rotated at a speed at which the laundry does not fall from the inner circumferential surface of the drum, the squeeze motion changes the rotating speed of the drum so that the laundry is repeatedly contacted and separated from the inner circumferential surface of the drum 130, .

The process of spraying wash water into the drum 130 during the filtration motion and the squeeze motion may be realized by a circulation flow path and a pump although not shown in FIG. The pump is connected to the bottom surface of the tub 120 to pressurize the washing water. One end of the circulating flow path is connected to the pump, and the other side of the circulating flow path is provided to discharge washing water from the upper portion of the drum to the inside of the drum. .

However, since the circulation flow path and the pump described above are necessary for spraying the washing water stored in the tub, it is preferable to exclude the case where the washing water is sprayed into the drum through the spray water passage connected to the water supply source outside the cabinet no.

That is, if the spray water supply channel is provided with a nozzle connected to the water supply source at one side and connected to the tub and capable of spraying the washing water into the drum, the washing water is supplied to the inside of the drum during filtration motion and squeeze motion. . ≪ / RTI >

FIG. 3 is a view showing the step motion in more detail. When the motor 140 applies a torque to the drum 130 in a predetermined direction, the drum rotates in a predetermined direction, so that the laundry is brought into close contact with the inner circumferential surface of the drum 130. At this time, it is preferable that the drum is rotated at about 60 RPM or more so that the laundry can be closely attached to the inner circumferential surface of the drum. Here, the rotational speed of the drum is determined in relation to the inner diameter of the drum, and is determined as the rotational speed at which the centrifugal force becomes larger than the gravitational force.

The motor 140 is reverse-phase braked to temporarily stop the rotation of the drum just before the laundry reaches the highest point in the drum beyond the 90-degree rotation direction of the drum 130. [ Since the reverse phase braking timing of the motor 140 is closely related to the position of the laundry in the drum 130, it is preferable that a device capable of judging or predicting the position of the laundry is provided. A sensing device having a Hall effect sensor may be an example.

Through the Hall sensor, the control unit can determine not only the rotation angle of the rotor but also the rotation direction. The details of which will be obvious to those skilled in the art, so that a detailed description thereof will be omitted.

The control unit is able to determine the rotation angle of the drum through the sensing device and controls the motor 140 to reverse-phase brakes before the drum reaches 180 degrees. Here, reverse phase braking means applying a reverse current so that the drum rotates in the opposite direction. For example, the current is applied to the motor so as to rotate clockwise, and then the current is suddenly rotated counterclockwise.

Therefore, the drum rotating in the clockwise direction is instantaneously stopped, and the angle at this time is substantially 180 degrees, so that the laundry falls to the lowest point inside the drum at the highest point inside the drum. Then, the current is continuously applied so that the drum rotates clockwise continuously.

FIG. 3 shows a case in which the drum rotates in the clockwise direction, but step motion may be performed during the counterclockwise rotation. However, since the step motion generates a high load to the motor 140, it is preferable to perform the step motion with lowering the actual rate.

The actual rate means the ratio of the driving time and the stopping time of the motor 140 to the sum of the driving time of the motor and the actual rate 1, which means that the motor is driven without stopping time. In the case of the step motion, it is preferable that the actual motion rate is controlled to about 70% in consideration of the load of the motor, and it is an example to stop for 4 seconds after driving for 10 seconds.

4 is a view showing the scrub motion in more detail. When the motor 140 applies torque to the drum 130, the laundry in the drum rotates clockwise. It is preferable that the drum 130 controls the motor 140 to have a rotation speed of about 60 RPM or more so that the laundry can be closely contacted to the inner circumferential surface of the drum. Then, when the laundry passes through a point of 90 degrees in the rotational direction of the drum, the motor 140 is reverse-phase braked, so that the laundry adhering to the inner circumferential surface of the drum falls to the lowest point of the drum.

When the laundry falls to the lowest point, the motor 140 provides a torque to rotate the drum counterclockwise. Therefore, the dropped laundry is brought into close contact with the inner circumferential surface of the drum and rotated in the counterclockwise direction. When the laundry is located between the point 90 degrees counterclockwise from the lowest point of the drum and the highest point of the drum, The laundry is dropped to the lowest point of the drum.

It is preferable that the above-described scrub motion is performed by lowering the actual rate because it generates a high load on the motor 140 as in the step motion. After stopping for 4 seconds after the execution of the scrub motion for 10 seconds, It can be an example that it is controlled.

Although not shown, the swing motion changes the braking system of the motor to the power generation braking in the scrub motion, and the timing of the power generation braking is changed when the laundry reaches the point 90 degrees in the rotational direction of the drum.

FIG. 5 is a graph comparing the degrees of cleaning force and vibration of each motion shown in FIG. 2. FIG. The axis of abscissa is the axis indicating the washing power, and it is easy to separate the dirt contained in the laundry as it goes to the left. The axis of ordinate indicates the level of vibration or noise, and the vibration level becomes higher as it goes to the upper part, but the washing time for the same laundry decreases.

The step motion and the scrub motion are motions suitable for a washing course in order to shorten the washing time and the case where the laundry is contaminated with an excellent cleaning power. In addition, the step motion and scrub motion are motions with high levels of vibration and noise. Thus, it is undesirable motion for a laundry course where the laundry is sensitive or when the laundry course needs to minimize noise and vibration.

The rolling motion is a motion characterized by excellent cleaning power, low vibration level, minimization of laundry damage, and low motor load. Therefore, it can be applied to all washing courses, but it is especially suitable for the initial detergent dissolving and laundry wetting.

The tumbling motion has a lower cleaning force than the scrub motion but a vibration level is a middle level motion between the scrub motion and the rolling motion. Since the rolling motion takes a longer washing time than the tumbling motion instead of a low vibration level, the tumbling motion is applicable to all washing courses, but is particularly useful for a step for dispersing the foam.

The squeeze motion is similar to the tumbling motion in the three-tipping force, and the vibration level is higher than the tumbling motion. The squeeze motion is a motion useful for the step of rinsing since the washing water is discharged to the outside of the drum through the laundry in the process of repeating the contact and separation of the laundry on the inner circumferential surface of the drum.

In the filtration motion, the cleaning force is lower than the squeeze motion, and the degree of noise is motion similar to rolling motion. The filtration motion is a motion that is useful for the step where the laundry is adhered to the inner circumferential surface of the drum and the laundry is discharged to the outside of the drum through the laundry so that the laundry is required.

The swing motion is the lowest vibration level and the lowest cleaning force. Therefore, swing motion is a motion that is useful for low noise or low vibration washing courses, and is suitable for sensitive clothes washing.

As described above, each drum driving motion has advantages and disadvantages. Therefore, it would be desirable to properly use these various drum driving motions. Also, each drum driving motion will have advantages and disadvantages in relation to the quantity of drum. Therefore, in the case of the same course, the same stroke, etc., it is desirable to appropriately use various drum driving motions in relation to the amount of the drum.

Hereinafter, a method of controlling a washing machine according to an embodiment of the present invention will be described in detail.

The present embodiment relates to a control method in a washing cycle. Here, the washing cycle may be a washing cycle as a part of the washing cycle or an independent washing cycle. The washing course may be selected through the course selection unit 117, and the independent washing cycle may be selected through the option selection unit 118. [

The washing step S100 includes a water supplying step S120 for supplying the washing water and the detergent to the tub 120 or the drum 130 to dissolve the detergent in the washing water. That is, the washing water is supplied from the outside of the washing machine together with the detergent for washing. In addition, the washing step includes a main washing step (S140) of washing the laundry by driving the drum. Therefore, the water supply step (S120) may be regarded as a preparation step for the main washing. Therefore, in order to increase the efficiency of the washing process (including the washing efficiency and the time reduction effect), it is desirable to improve the efficiency in the water supply step.

In the water supply step (S120), a process of dissolving the detergent in the washing water will be performed. In order to increase the efficiency of the washing cycle, it is desirable that the detergent dissolution is effectively completed at the early stage of the water supply step. Therefore, it is preferable that the step S122 for promoting dissolution of detergent is performed in the water supply step.

In order to promote detergent dissolution, a motion (drum driving motion) in which the laundry flows in the drum is preferably a motion to supply strong mechanical force to washing water and laundry. Therefore, in the detergent dissolution facilitating step (S122), it is preferable to perform a step motion in which the laundry rising along the rotating drum is repeatedly dropped out of the inner peripheral surface of the drum by the braking of the drum. Of course, a scrub motion may be performed in which the laundry rising along the rotating drum, which is not the step motion, is repeatedly lifted after the drum is braked and reversed due to the reverse rotation. Since the step motion and the scrub motion are motions in which the drums stop rapidly after rotating, the flow direction of the laundry is rapidly changed. Therefore, it can be said that a strong impact force is applied to the laundry. In addition, such a motion is a motion that applies a strong impact force to washing water. Accordingly, strong mechanical force is provided at the beginning of the water supplying step (S120), thereby promoting the dissolution of the detergent, thereby improving the washing efficiency.

Further, by repeating the sequential combination of the step motion and the scrub motion, the detergent dissolution promotion step (S122) can be performed. In this case, since different types of drum driving motions are combined, the flow mode of the laundry, the flow mode of the washing water, and the like can be further diversified to further improve the efficiency of the washing cycle.

Meanwhile, it is preferable that the step of determining whether the supplied detergent is a liquid detergent or a powder detergent by rotating the drum at the beginning of the water supplying step (S120) is performed (S121). This can be said to be a step performed to determine the drum driving motion or the number of times of rinsing in the rinsing cycle which can be performed after the washing cycle is completed. It is preferable that the items related to the washing and rinsing operations are visually displayed to the user through the display unit 119 at the beginning of the driving of the washing machine. Therefore, it is preferable that the step S121 of judging the type of the detergent is performed at the beginning of water supply, particularly before the detergent dissolution promotion step (S122).

In the water supplying step (S120), a process of sufficiently wetting the laundry with washing water as well as dissolving the detergent should be performed. This is because, in the case of the drum type washing machine, the laundry is not washed in a state in which the laundry is immersed in the washing water. Therefore, it can not be overstated to emphasize that it is necessary to be able to quickly carry out the spraying in the early stage of the laundry administration.

For this, a circulation step of circulating the washing water in the tub in the detergent dissolution facilitating step (S122) and supplying the washing water to the inside of the drum may be performed. In this circulation step, the washing water outside the lower portion of the drum is supplied into the drum, so that the washing water flows as a whole. Therefore, it is possible to rapidly dry the sachets and to further promote the dissolution of the detergent.

After the detergent dissolution facilitating step (S122), the step of promoting the capturing depth (S123) may be performed. This step may be performed after the watering step is performed to some extent and may be performed until the watering step (S120) is finished. In other words, the step S123 of promoting the sedimentation can be regarded as a step of performing the sedimentation completely.

In the detergent dissolution promotion step (S122), a part of the sediment is formed, and the washing water level rises, so that the washing water is also accumulated in the drum. Therefore, it is preferable that a step of further accelerating the seeding is performed. The drum driving motion in the sediment-expediting step S123 may be controlled differently from the detergent dissolving promotion step S122.

The drum driving motion in the seeding promoting step S123 may include rolling motion. In addition, the drum driving motion in the seeding promoting step may include a filtration motion. These filtration motions and rolling motions may be performed in order.

Here, the filtration motion is a motion for widening the surface area of the laundry by widely dispersing the laundry, and therefore, it is highly desirable to uniformly carry the laundry. In addition, since the rolling motion continuously reverses the laundry, the washing water accumulated in the lower portion of the drum can be evenly contacted with the laundry, which is highly desirable for uniformly performing the laundry.

In order to utilize such effects to the maximum, the drum driving motions (i.e., the filtration motions and the rolling motions) may be repeated in order to perform the step S123.

As described above, the water supplying step (S120) is a step of preparing the main washing step (140). Therefore, detergent dissolution, capillary action, etc. must be performed quickly and completely. This should be done irrespective of whether the quantity is large or small. However, considering the limit of the drum capacity, the limit of the wash water that can be supplied into the drum, and the like, it is preferable that the drum driving motion in the water supplying step S120 is controlled differently depending on the laundry amount. This is because, depending on the amount of drum, the drum driving motion, which can maximize the detergent dissolution and saturation effect, may be different.

Therefore, it is preferable that the step S110 is performed to determine the amount of laundry, that is, the amount of laundry contained in the drum, before the water supply step S1200. In addition, it is preferable that the drum driving motion in the water supplying step S120 is controlled differently according to the result of the determination in the step S110.

Such a determination of the amount of waste can be performed by measuring the current required to rotate the drum. For example, it can be performed by measuring a current required while performing tumble motion. In order to perform the tumble motion, the control unit controls the drum to rotate at 46 RPM, and the current value applied will vary depending on the amount of the drum. This can be used to determine the amount of waste.

The detergent dissolution facilitating step S122 may be controlled so as not to be performed when the amount of the laundry determined in the amount-of-detainment determining step S110 is equal to or greater than a predetermined amount of laundry. That is, the detergent dissolution promotion step may be controlled to be performed when the detergent dissolution promotion step is performed at a predetermined levitation level or lower. This is because the drum-driven motion that supplies the mechanical force is more effective in the case of a small amount of the laundry, and the laundry is sufficiently contacted with the washing water because of a small amount of laundry. That is, the small amount of laundry means that the surface area of the laundry to be in contact with the washing water is small, and it means that detergent dissolution and wrapping can be performed in a short time by applying mechanical force such as turning the laundry over. Therefore, the washing effect can be obtained to some extent through the step motion or the scrub motion, and the effect of shortening the washing time can be anticipated.

On the other hand, in the case of a large quantity of the laundry, the mechanical strength may not be sufficient, and laundry may not be in contact with the washing water sufficiently. This is because the washing water may not be supplied to the laundry in the case where the laundry is gathered.

Therefore, when the amount of the laundry is equal to or higher than the predetermined amount of the laundry, the step of promoting dissolution of the detergent may be omitted and the step of accelerating the step of expelling the soap may be performed immediately. It is more preferable that the laundry is brought into contact with the washing water sufficiently when the laundry is at a predetermined level or more, thereby further promoting dissolution of the detergent. To this end, in the water supply step (S120), a circulation step of circulating the washing water in the tub and supplying the washing water to the inside of the drum is performed.

It is preferable that the drum driving motion is controlled so as to include the filtering motion in the step S123. This tilting motion as well as the filtering motion can be performed. That is, the washing water is supplied by widening the surface area of the laundry through the filtration motion, and the laundry is uniformly dispersed without tangling through the tumbling motion, so that the laundry can be supplied evenly to the laundry.

Therefore, when the amount of the laundry is large, the washing water can be sufficiently supplied to the washing water from the beginning of the water supplying step (S120) to further improve the washing effect in the main washing.

As a result, in the water supplying step S120, the drum driving motion is controlled differently according to the amount of discharged water, so that the result required in the water supplying step can be optimally performed.

The washing step S100 includes a main washing step 140. During the main washing step S140 and the water supplying step S120, a heating step S 130 ) Can be performed.

Here, the heating step is a step of heating the washing water through the heater provided in the lower part of the tub, or supplying the steam into the drum to raise the temperature of the washing water or the temperature inside the drum. Thus, the heating step may be performed or omitted as needed. That is, in the case of washing with cold water, the heating step S130 will not be performed. However, if the temperature of the wash water is preset to be higher than the cold water by default during the course selection, or if the temperature of the wash water is selected to be higher than the cold water through the option selection unit 118, the heating step (S130) .

The heat generated in the heating step (S130) must be sufficiently transferred to the laundry in any form. Therefore, it is preferable that the drum driving motion in the heating step S130 is controlled differently depending on the amount of the drum driving motion. Of course, a general tumble motion can be performed regardless of the amount. However, as described above, it is more preferable that the rolling motion is performed when the amount is less than the predetermined bulk amount level. That is, in the case of a small amount of laundry, it is more effective to heat and wash the laundry repeatedly in the lower portion of the drum rather than the laundry dispersion.

Therefore, in the heating step (S130), it is preferable that the combination of the tumble motion and the rolling motion is performed when the quantity is small, and the tumble motion is performed when the quantity is large.

The heating step (S130) may include a heating preparation step for preparing for heating after the water supply step.

After the watering step (S120), it can be seen that the filling is completed. Therefore, it is possible to make a more accurate determination after the water supply step (S120). This is because it is difficult to distinguish between wet and dry laundry. For example, there is a problem that wet laundry is judged to be larger than the actual amount of laundry before it is dried.

Therefore, it is possible to perform the precise amount determination step before the main washing in the heating step (S130) before the main washing (S140). In the case where the heating step is omitted, the step corresponding to the heating preparation step may be performed for determining the amount of fine particles. That is, if the heating step is omitted, the step of performing the accurate squeezing amount determination before the main washing step (S140) after the watering step (S120) may be performed.

When the water supply step S120 and the heating step S130 are completed, the main washing step S140 is performed in which the washing operation is performed in earnest. After the main washing step S140 is completed, the washing step S100 is terminated .

The drum driving motion in the main washing step S140 may be performed in an order combination of step motion, tumble motion and rolling motion. This drum-driven motion provides strong mechanical force while allowing the laundry to flow in various forms, further enhancing the efficiency of washing. In addition, the drum driving motion in the main washing step S140 may be performed in a sequential combination of the filtration motion and the tumble motion. The drum driving motion continuously supplies washing water to the laundry to improve washing efficiency due to the detergent, and additionally applies a mechanical force to the laundry to improve washing efficiency due to the mechanical force.

Therefore, it is preferable that the drum driving motion in the main washing step S140 is controlled so as to vary depending on the laundry amount. This is because, as described above, drum driving motions, which can exhibit optimal washing effects depending on the amount of laundry, can be changed.

Here, the amount discharged may be determined before the watering step (S120), and may be the amount determined in the heating step (S130). It is more preferable to control the drum driving motion according to the laundry amount determined after the water supplying step S120 in the main washing step S140 because there is a possibility that a small amount of wet laundry may be mistaken.

When the amount of the drum is equal to or greater than a predetermined drum-level, the drum-driving motion is preferably performed including a filtration motion. It is preferable that the tumble motion is performed in addition to the filtration motion. Of course, if there is no configuration for washing water circulation, only tumble motion may be performed. This is because, in the case of a large amount of laundry, it is preferable to continuously supply washing water to the laundry and to increase the washing efficiency by adding mechanical force.

It is preferable that the drum driving motion is performed in the step motion or the rolling motion when the amount of the laundry is less than the predetermined empty amount level. This is because it is desirable to increase washing efficiency by applying a strong mechanical force and generating flow of laundry in various forms. In addition, tumbling motion may be performed together with such motion.

As described above, the control method of the washing cycle according to the embodiment of the present invention is a method of controlling the washing cycle in the water supplying step S120, the heating step S1300, and the main washing step S140, So as to improve the efficiency of the washing process. In addition, it is possible to vary the drum driving motions in the respective steps depending on the amount of the laundry to perform the washing cycle (S100) optimized according to the laundry quantity.

On the other hand, the degree of contamination of the laundry can be selected through the option selection unit S118. According to such a selection, it is preferable that the operating rates in the heating step (S130) and the main washing step (S140) are controlled differently. This is because, if the degree of contamination is low, the laundry may be unnecessarily damaged if the operating rate is increased.

However, it is preferable that the operating rate in the water supplying step (S120) is not changed according to the selected degree of contamination. This is because in the water supply step (S120), since the operating rate is preset so as to optimize the detergent dissolution and the sedimentation, unnecessary damage to the laundry can be neglected. And there is a risk that the detergent dissolving and spreading may not be performed sufficiently to reduce the operating rate.

As described above, the washing cycle S100 according to the present embodiment may be a part of the laundry course. Here, the laundry course is preferably a standard course. That is, it is preferable that the course is a general course, which is generally used by a user for washing clothes without any optional operation. This is because the washing cycle according to the present embodiment can cover various clothes and contamination degree.

The drum washing machine can see the inside of the drum from the outside through the door 113. Various types of drum driving motions are performed in the washing cycle or the laundry course including the washing cycle according to the present embodiment. Thus, the user can directly see various drum driving motions performed inside the drum. That is, it is possible to visually confirm the type of washing (tumbling motion) by tapping lightly, the form of stamper (stem motion), the form of gentle rinsing (rolling motion), and the form of strong rubbing washing (scrub motion). Through this, the user judges that the washing is performed well in an emotional manner. This results in an improvement in practical laundry performance and an effect of further enhancing the emotional satisfaction of the user.

Hereinafter, a method of controlling the rinsing cycle according to the embodiment of the present invention will be described in detail with reference to FIG. The above embodiment may be performed as one course together with the above-described washing cycle S100, and may be performed independently. For convenience of explanation, a control method of the rinse cycle (S200) performed after completion of the above-described washing cycle in one course will be described.

In the washing course consisting of the washing step (S100), the rinsing step (S200) and the dewatering step (S300), several dewatering steps are performed. First, dehydration in the dehydration and rinse cycle (S200) can be performed after the completion of the washing cycle (S100), which can be referred to as depletion so as to be distinguished from the dehydration cycle (S300) at the end of the washing cycle.

Dehydration or dehydration is determined by the RPM of the drum. Typically the runoff is performed at about 200 to 400 RPM and the RPM in the dewatering run is set to delicate (about 400 RPM), about (about 600 RPM), about (about 800 RPM) and about 1000 RPM. Such dephasing is performed at a higher RPM than the low resonance frequency, and dehydration (S300) is performed at higher RPM than the higher resonance frequency.

Here, the resonance frequency is a physical value inherent to the washing machine, and the vibration of the washing machine sharply increases near the resonance frequency. If the drum rotates around the resonance frequency in a state where the laundry is not dispersed uniformly in the drum, the vibration of the washing machine becomes very large.

Therefore, in general, in the case of dehydration at a resonance frequency or more, a washing process is performed to perform an unwrapping step for uniformly dispersing the laundry in the drum, and an acceleration step for quickly deviating the resonance frequency band is performed.

Accordingly, as the water supply and rinsing are repeated several times in the rinsing step (S200), there is a problem that much time is required for the interruption to be performed in the middle. Particularly, in recent years, there is a growing demand from users for solving the problem that the detergent residue remains after the washing is completed. In order to solve such a problem, the rinsing step (S200) may be performed at least three times. In this case, it takes a lot of time to perform the rinsing, and thus takes a long time in the rinsing step (S200). This also causes a problem that the laundry course including the rinsing step (S200) takes a lot of time.

In this embodiment, the RPM of the liver tank set in the middle of the case where water supply and rinsing are repeated several times in the washing cycle (S200) is set differently. That is, the drum is rotated at a RPM of less than a low resonance frequency in a specific abstraction, and the drum is rotated at a RPM of at least a high resonance frequency in a specific abscissa.

In the case where the insufficiency is performed below the low resonance frequency, the time required for the forging, the vibration amount sensing, and the acceleration step is not required, and the time required for the rinsing step (S200) can be shortened. The RPM in such an inflow may be set at about 100 to 110 RPM.

However, in the case of performing the deprivation at the RPM lower than the low resonance frequency, the time can be shortened, but the washing water containing the detergent may not be sufficiently discharged from the laundry.

On the other hand, the time when the detergent residue and the contaminant residue are most remained in the washing water will be the time when the washing cycle (S100) ends. Therefore, it is highly desirable to discharge the washing water from the laundry as much as possible after the completion of the washing cycle (S100).

Therefore, in this embodiment, it is preferable to perform the high-speed dehydration (S210) after the washing cycle (S100). In the high-speed dehydration (S210), the drum is rotated at a RPM higher than a high resonance frequency to discharge the washing water from the laundry as much as possible. The RPM at this time is preferably about 1000 RPM.

When the high-speed dehydration (S210) is completed, a first rinsing step (S220) is performed in which water is supplied and the drum is driven to perform rinsing. It is preferable that the rinsing water level here is a level that allows the water level to be seen even outside the door, that is, the degree to which the laundry is immersed in the washing water. That is, at the beginning of the rinsing cycle (S200), the rinsing is sufficiently performed with a large amount of washing water.

In the rinse cycle S200, the drum driving motion is preferably a scrubbing motion or a swinging motion. That is, in order to improve the rinsing performance by allowing the laundry to flow while the laundry is as much as possible in the wash water. Such scrub motion or swing motion corresponds to rubbing the laundry continuously in the wash water after immersing the laundry in the wash water. In contrast, tumbling motion and step motion correspond to repeating the process of dipping laundry into the wash water. Therefore, it is preferable that the first rinsing step (S220) is controlled so that the drum is driven by scrub motion or swing motion above the high water. In addition to this scrub motion or swing motion, the high water level can indicate that the rinse is visually sufficient. Therefore, it is possible to display the effect that the rinsing is sufficiently performed emotionally to the user.

Meanwhile, in the first rinsing step (S220), a circulation step of circulating the washing water in the tub into the drum may be performed. That is, it is possible to realize that the rinsing is performed with the flowing water by spraying the washing water into the drum. This can be referred to as a spray rinse, and this also has the effect of indicating that the user is sensitive enough to rinse.

After the first rinsing step (S220) is finished, the first drainage and insufficiency (S230) are performed. Here, it is preferable that the drum is driven by step motion or tumbling motion in the course of draining. This is to improve the washing efficiency while lifting and dropping the laundry while improving the rinsing efficiency by removing the generated foam. Here, it is preferable that the drum driving motion is controlled so as to vary depending on the amount of the drum. That is, in the case where the amount is small, it is preferable to drive the tumbling motion in the step motion in which the difference in dropping can be maximized.

Preferably, the first drainage and siphoning (S230) is performed at about 100 to 110 RPM, i.e., 1 G or more and at a RPM of less than the low resonance frequency. Therefore, it is possible to exclude the unwrapping step, the vibration sensing step, and the acceleration step, thereby greatly shortening the time required.

On the other hand, in the first drainage and shedding (S230), the tripping can be performed at about 400 RPM which is a low speed resonance frequency or more. Here, since the step motion or the tumbling motion is performed at the time of draining to sufficiently disperse the laundry, the forging step can be excluded. Thus, a short period of time can be accomplished with a vibration sensing step and a single acceleration step. Such a fouling is performed at a relatively high RPM to discharge the detergent residues and contaminants that have not been discharged through the high-speed dehydration (S210). However, if the amount of vibration measured in the vibration sensing step is out of the allowable range, the vibration sensing step may be repeated to prevent the user from entering the acceleration step. This may cause a problem that the rinse time is increased. Accordingly, it is preferable that the vibration sensing step is performed at about 100 to 110 RPM, and when the acceleration step is not performed within the predetermined number of times, the first drainage and the step of removing (S230) may be terminated.

When the first draining and inserting step S230 is completed, a second rinsing step S240 is performed. The second rinsing step S240 may be performed in the same manner as the first rinsing step S240 described above.

When the second rinsing step (S240) is completed, a second drainage and insolation step (S250) is performed. The second draining and inserting step S250 may be performed in the same manner as the first draining and inserting step S250. However, it is preferable that the second drainage and shedding step S250 is carried out at about 100 to 110 RPM. This is to shorten the rinse time because the detergent sufficiently drained in the high-speed dehydration (S210) and the first drainage and intermittent step (S250).

On the other hand, the determination result of the detergent type determination step (S121) in the above-described washing step (S100) can be used in the rinsing step (S200). That is, as a result of the judgment, when the liquid detergent is used, the detergent hardly remains. Therefore, in order to shorten the time spent in the rinsing step (S200), the second rinsing step (S240) is preferably omitted. As a result of the determination, when the powdery detergent is used, the first rinsing step (S220) and the second rinsing step (S230) may be performed by default as described above.

As a result of the determination, if it is the liquid detergent, it is preferable that the third rinsing step (S260) is performed as the final rinsing step as the final rinsing step after the first rinsing step (S220). As a result of the determination, it is preferable that the third rinsing step (S260) is performed as the final rinsing step when the powdery detergent is the final rinsing step after the second rinsing step (S240). However, if bubbles are detected in the third rinsing step (S260), a fourth rinsing step may be performed as a final rinsing step.

Here, in the final rinsing step, the wash water level is preferably low. That is, in the case of a tilting drum type washing machine in which the drum is inclined at a predetermined angle, it is preferable that the number of washings is such that the washing water can be collected only in a part of the rear portion of the drum. Therefore, it can be said that the water level can not be detected outside the washing machine.

This level is intended to prevent any more bubbles from being generated in the laundry, and even if the bubbles are generated, it is generated in the tub, not inside the drum, so that the bubbles are removed from the laundry. Thus, the user can visually confirm that no bubbles are generated in the final rinsing step, and the satisfaction with the rinsing performance can be enhanced emotionally.

On the other hand, after the final rinsing step, a third drainage step (S270) for performing the dewatering step (S300) is performed. In the drainage step (S270), the drum is preferably driven by step motion or scrubbing motion for dispersing the laundry.

Hereinafter, a control method of the dehydration stroke according to the embodiment of the present invention will be described in detail with reference to FIG. The above embodiment may be performed as one course together with the above-described washing cycle S100 and rinse cycle S200, and may be performed independently. For convenience of explanation, a control method of the dewatering step (S300), which is performed after completion of the washing and rinsing steps described above in one course, will be described.

The dewatering step (S300) includes normal dewatering (S350) in which dewatering is performed by continuously rotating the drum with dehydrating RPM. Here, it can be set as a default to be about 1000 RPM in normal dehydration. That is, the amount of water is minimized so as to minimize residual detergent.

The dewatering step (S300) may be performed in the same manner as the high-speed dewatering step (S210). However, it is preferable that the high-speed dehydration step (S210) is such that the drum is always rotated at a high speed dehydration, that is, about 1000 RPM irrespective of the user's selection. That is, regardless of the user's selection, the residual detergent is discharged as much as possible before rinsing. However, it is preferable that the RPM in the dewatering step (S300) can be changed according to the selection of the degree of dehydration of the user as described above. Because the RPM in the final dehydration is related to the water content after final dehydration and the wrinkling of the laundry. Therefore, it is desirable for the user to be able to select the RPM in the final dehydration in relation to the moisture content and the degree of wrinkling of the laundry.

The dewatering step (S300) may include a deburring step (S310) of driving the drum to loosen the tangled laundry and dispersing the laundry. This is to minimize the occurrence of vibration when the drum is rotated at high speed. However, since the drum is driven in step motion or scrubbing motion at the time of draining just before the dewatering step (S300) as described above, the time required for the ripening step (S310) can be greatly shortened.

Then, in step S310, the rotation of the drum may be accelerated to measure the eccentricity while rotating the drum for a predetermined time at a RPM below the low-resonance frequency (S320). This is a step of determining whether the laundry is uniformly dispersed in the drum by measuring the amount of vibration.

Here, the eccentricity measurement step S320 may be performed before the forging step S310. This is because it is very likely that the blowing in the rinsing step (S200) is sufficiently performed. Therefore, in order to shorten the time required for the dewatering step (S300), the dewatering step (S300) may be started from the eccentricity measuring step (S320). At this time, if the measured eccentricity amount is compared with the reference eccentricity amount (S330), the acceleration step S340 to be described later is performed. Otherwise, the unblowing step S310 can be performed. Of course, in the forging step S310, the drum driving may be performed in step motion to promote the unwinding. The eccentricity measuring step S320 is performed again after the unwinding step S310.

After the eccentricity measuring step S320, a step S340 of accelerating the drum rotation with the normal spin-drying RPM is performed. Thereafter, a normal spin-spinning operation S350 is performed in which the spinning drum is rotated by the normal spin- ) Is terminated.

The above-described washing step (S100), rinsing step (S200) and dewatering step (S300) can independently or in association with each other can improve the efficiency and shorten the time required for each stroke. In addition, it is possible to provide a washing course with a combination of these strokes, which improves the washing efficiency, removes residual detergent, and shortens the time required.

The present invention may be embodied in various forms without departing from the scope of the invention. Accordingly, it is to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.

Included in the Detailed Description of the Invention.

1 is a perspective view of a washing machine to which an embodiment of the present invention can be applied;

FIG. 2 is a schematic view showing various drum driving motions that can be utilized in a control method of the washing apparatus of the present invention; FIG.

3 is a detailed view of the step caption of FIG. 2;

4 is a detailed view of the scrub motion of FIG. 2;

FIG. 5 is a graph comparing cleaning power and vibration level of each motion shown in FIG. 2; FIG.

6 is a flowchart of a control method according to an embodiment of the present invention;

7 is a flowchart of a control method according to another embodiment of the present invention; And

8 is a flowchart of a control method according to another embodiment of the present invention.

≪ Description of reference numerals &

110: cabinet 120: tub

130: drum 140: motor

Claims (17)

1. A control method of a washing machine for performing a rinsing cycle including a rinsing step of rinsing laundry by supplying washing water to a laundry, a tub, or a drum, and a drain step of draining washing water, Wherein the washing step includes the step of rotating the drum to determine the amount of the laundry in the drum, In the drainage step, drum driving motion is performed in which laundry is lifted up to a predetermined height in the drum and then dropped down, The drum driving motion is a motion in which the laundry rising along the drum rotating in one direction or both directions is repeatedly dropped out of the inner peripheral surface of the drum by the braking of the drum, The drum driving motion is a motion in which the laundry rising along the drum rotating in one direction is repeatedly dropped out of the inner circumferential surface of the drum when the determined laundry amount is equal to or larger than the predetermined laundry amount level, Wherein the predetermined height is set to be lower when the determined laundry amount is greater than a predetermined laundry amount level than when the determined laundry amount is less than a predetermined laundry amount level. The method according to claim 1, Wherein the drum driving motion includes a stepping motion in which laundry that rises along a rotating drum is repeatedly dropped out of the inner peripheral surface of the drum by braking of the drum. The method according to claim 1, Wherein the drum driving motion includes a tumbling motion in which laundry that rises along a rotating drum repeats dropping off the inner circumferential surface of the drum. 4. The method according to any one of claims 1 to 3, Wherein a high-speed dehydration step of dehydrating the drum by rotating the drum at a high RPM or higher frequency at an initial stage of the rinsing cycle is performed. 5. The method of claim 4, Wherein the high-speed dehydration step is performed irrespective of the user's selection of the dehydration RPM option. 4. The method according to any one of claims 1 to 3, Wherein the rinsing step is performed at least twice. The method according to claim 6, Wherein the water level in the first rinsing step is a high water level that can be confirmed from the outside and the water level in the final rinsing step is a low water level that can not be confirmed from the outside. 4. The method according to any one of claims 1 to 3, Wherein the rinsing step is performed three times and the first and second rinsing steps are performed after the first and second rinsing steps. 9. The method of claim 8, Wherein after the first rinsing step, the drum is rotated at a low resonance frequency and at a RPM of less than a high resonance frequency to perform a detoxification step. 9. The method of claim 8, Wherein the drum is rotated at an RPM of 1 G or more and less than a low resonance frequency. 9. The method of claim 8, Wherein the circulation step of circulating the wash water in the tub to the inside of the drum is performed in the first rinsing step. A control method of a washing machine for performing a washing cycle including a washing cycle and a rinsing cycle, Wherein the washing step includes the step of rotating the drum to determine the amount of the laundry in the drum, The drum driving motion is performed in the rinsing step of the rinsing cycle in accordance with the determined amount, In the drainage step of the rinsing cycle, drum driving motion is performed in which laundry is lifted up to a predetermined height in the drum and then dropped down, The drum driving motion is a motion in which the laundry rising along the drum rotating in one direction or both directions is repeatedly dropped out of the inner peripheral surface of the drum by the braking of the drum when the determined laundry amount is less than the predetermined laundry amount level, The drum driving motion is a motion in which the laundry rising along the drum rotating in one direction is repeatedly dropped out of the inner circumferential surface of the drum when the determined laundry amount is equal to or larger than the predetermined laundry amount level, Wherein the predetermined height is set to be lower when the determined laundry amount is greater than a predetermined laundry amount level than when the determined laundry amount is less than a predetermined laundry amount level. 13. The method of claim 12, Wherein a high-speed dehydration step of dehydrating the drum by rotating the drum at a high RPM or more at a high resonance frequency is performed at the beginning of the rinsing cycle after completion of the washing cycle. delete 13. The method of claim 12, Wherein the drum driving motion in the drainage step is a step motion or a scrub motion in which the rotation and stop of the drum are repeated and the tumbling motion when the determined amount is less than the predetermined drum volume level, Way. 13. The method of claim 12, Wherein the washing step includes the step of judging the kind of the supplied detergent, Wherein the number of rinsing steps performed in the rinsing cycle is controlled differently according to the determined result. 17. The method of claim 16, Wherein the water level in the first rinsing step is a high water level that can be confirmed from the outside and the water level in the final rinsing step is a low water level that can not be confirmed from the outside.

Images