KR101634179B1 - 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 another aspect of the present invention, there is provided a method for driving a vehicle, A washing and drying step of driving the drum so that the motion (drum driving motion) of the laundry flows in the drum according to the selected course; A rinsing step in which rinsing is performed; And a dehydration step in which dehydration is performed.

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. Thus, the damage of the laundry of the same material as the cotton is not a big problem, but the damage of the delicate laundry such as wool and synthetic fibers can not be overlooked. Of course, in a conventional drum washing machine, an attempt has been made to drive the drum by varying the actual rate (on time of the drum / off time of the drum) according to the material of the laundry to prevent damage to the laundry of delicate material.

For example, in the case of washing laundry of a cotton material, the driving time of the drum is made longer than the stopping time, and in the case of washing laundry of synthetic fiber material, the driving time of the drum is shorter than that of the cotton material.

However, in spite of these attempts, the tumble drive is still damaged by the tumble driving, and when the actual rate is too low, the washing efficiency is significantly lowered.

Accordingly, there is a demand for a washing machine and a control method thereof that can prevent damage to laundry and improve washing efficiency.

It is an object of the present invention to provide a control method of a washing machine capable of preventing damage to laundry and improving washing efficiency.

More particularly, it is an object of the present invention to provide a washing machine and a control method thereof, in which a user can easily select a washing course that can perform optimal washing depending on the material of the laundry.

Another object of the present invention is to provide a control method of a washing machine which is easy to use by controlling the motion of the laundry in the drum according to a course selected according to the material of the laundry, thereby shortening the washing time.

It is an object of the present invention to provide a washing machine and a control method thereof that can improve the efficiency of a washing course as a whole through optimum efficiency and time reduction at each stage of the washing cycle, .

According to an aspect of the present invention, there is provided a method for driving a drum, the method comprising: selecting a course to be operated among a plurality of driving courses from a user; driving the drum such that a motion (drum driving motion) A washing and rinsing step in which washing is performed; a rinsing step in which rinsing is performed; And a dehydration process step in which dehydration is performed.

Here, it is preferable that the plurality of driving courses are provided according to the type of the laundry. Accordingly, it is possible to expect an optimal washing effect and an effect of preventing laundry damage according to the material of the laundry.

The washing and washing step may include a water supplying step of supplying the washing water and the detergent to the tub or the drum to dissolve the detergent in the washing water. In addition, it is preferable to drive the drum so that the drum driving motion to the water supplying step is changed according to the selected course.

Here, it is preferable that the drum driving motion is a scrub motion, a step motion, or a combination motion of these sequences according to the selected course.

Preferably, the washing and rinsing step includes a rinsing step of supplying washing water and a detergent solution to laundry. The drum driving motion may include a rolling pattern. Preferably, the drying step includes a circulation step in which the washing water and the detergent solution in the tub are circulated and supplied to the laundry in the drum. It is further preferable that the circulation step is performed when the drum driving motion is at least a filtration motion. After the filtering motion is performed in the circulation step, the rolling motion may be performed.

The washing and drying step may include a main washing step of washing the laundry by driving the drum after the filling step.

The washing and drying step may include a heating step of raising the temperature of the washing water or the atmospheric temperature in the drum by driving the steam generator or the tub heater before the main washing step after the seeding step.

The drum driving motion in the main washing step may include a tumbling motion, and the drum driving motion in the main washing step may drive the drum so that the drum driving motion is changed according to the selected course.

The plurality of driving courses may include a cotton course, a mix course and a synthetic course, each of which is provided for a laundry material made of a cotton material, a synthetic fiber material, and a laundry material mixed with the material.

Preferably, in the washing step of the cotton course, the drum driving motion includes rolling motion, and in the washing and washing step of the synthetic fiber course, the drum driving motion preferably includes a swinging motion. It is also preferable that the drum driving motion includes an order combination motion of the rolling motion and the swing motion in the washing step of the mixing course.

The predetermined value is set at least at any one of the drum RPM, the running time of the course or the running rate (on / off ratio of the motor driving the drum) in the spinning course in the cotton course of the cotton course, synthetic fiber course and mixed course A larger one is preferable.

Wherein the washing and drying step includes a water supplying step of supplying the washing water and the detergent to the tub or the drum to dissolve the detergent in the washing water, wherein the drum driving motion in the water supplying step includes a scrubbing motion in the cotton course, Step motion, and the combined motion of the scrub motion and the step motion in the mixed course.

It is preferable that the drum driving in the rinsing step is performed in a tumbling motion at a water level higher than the water level in the washing cycle irrespective of the selected course.

According to the present invention, it is possible to provide a washing machine capable of preventing damage to laundry and improving washing efficiency.

More specifically, the present invention can provide a washing machine and a control method thereof that allow a user to easily select a washing course that can perform optimal washing depending on the material of the laundry.

Also, it is possible to provide a washing machine and its control method which are convenient to use by controlling the motion of the laundry in the drum according to the course selected according to the material of the laundry, thereby shortening the washing time.

It is possible to provide a washing machine and a control method thereof that can enhance the efficiency of the washing course as a whole and improve the satisfaction of the user through optimal efficiency and shortening the time required for each stage of the washing cycle.

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 allowing a 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 dropping point of the drum, Will be 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, friction between laundry, friction between laundry and washing water, and dropping 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 down 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 when the laundry in the drum falls down to the maximum dropping speed. 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 does not brakes the motor, but smoothly changes the rotating direction of the drum.

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 motor driving time to the sum of the driving time and the stopping time of the motor 140, and the actual rate 1 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-mentioned scrub motion is performed by lowering the actual rate since the step 140 causes 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, the 70% As shown in FIG.

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 with reference to FIG.

The present embodiment relates to a control method for performing a laundry course. The washing course herein means the operation of the washing machine in which the washing, rinsing and dewatering processes are automatically performed in sequence. The laundry course can be selected through the course selection unit 117. [

The course selection unit 117 may be provided in the form of a rotary knob. A plurality of courses are printed on the periphery of the rotary knob, and the user can select a specific course among a plurality of courses by rotating the rotary knob. The rotary knob is provided with an LED corresponding to each course, and when a specific course is selected, the corresponding LED emits light so that the user can easily know which course has been selected.

The details of the course selection unit 117 will be apparent to those skilled in the art and will not be described in detail.

The user selects a desired driving course through the course selection unit 117 provided in the control panel 115. [ That is, the control unit receives a course to be operated among a plurality of driving courses from the user (S10). The input driving course includes a washing step of washing the laundry by using washing water and detergent as a washing course, a rinsing step of discharging residual detergent and contaminants from the laundry by using washing water, .

On the other hand, it is preferable that the driving course is provided in various ways. Such a driving course is provided in accordance with the type, material, and specific purpose of the laundry.

According to the embodiment of the present invention, it is preferable that washing is performed by driving the drum such that the motion (drum driving motion) of the laundry flows in the drum according to the selected course. In particular, it is preferable that the drum driving motion in the washing cycle is controlled to be changed. Here, the drum driving motion is different from the drum driving time and the running rate associated with the stopping time. That is, as the drum is driven, it is preferable to control so that the laundry flows in the drum, that is, the traveling distance of the laundry varies depending on the selected course.

When the washing and rubbing step S100 is finished, the rinsing step S200 and the dewatering step S300 are performed in order to complete all the selected driving courses.

Here, the plurality of driving courses may be provided according to the type of laundry. That is, it may be provided according to the material of the laundry. For example, a cotton course for washing cotton fabrics such as towels, tablecloths, T-shirts, a synthetic course or easy care course for washing fabrics of synthetic fibers, A mix course for washing textile fabrics may be provided.

The synthetic fiber material includes materials such as polyamide, acrylic, and polyester.

Cotton fabrics and synthetic fabrics have different characteristics. That is, cotton fabric is strong against friction or impact and less likely to be deformed than synthetic fabric material. And the cotton fabric can absorb more amount of washing water than the fabric of synthetic fiber material. Cotton fabrics are less likely to wrinkle than synthetic fabrics.

Therefore, it is preferable that the washing course prepared according to the material of the cloth is performed in a different manner in accordance with the characteristics of the fabric material, such as the washing, rinsing and dewatering steps.

The washing step S100 includes a water supplying step (S110) 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. Here, in order to initially supply the washing water and the detergent to the laundry, it is preferable to directly supply the washing water and the detergent to the laundry in the drum. That is, the water supply channel of the washing water can be positioned to supply the washing water from the upper front portion of the drum to the inside of the drum, not the lower portion of the tub. In this case, when the detergent is a powder detergent, there is a possibility that the detergent dissolution is not sufficient, but the detergent can be sufficiently dissolved due to the drum driving motion as described later. Therefore, it is possible to reduce the time required for the washing cycle (S100) by supplying the washing water and the detergent to the laundry in the beginning, and to further improve the washing efficiency.

In addition, the washing step includes a main washing step (S130) of washing the laundry by driving the drum. Therefore, the water supply step (S110) 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 (S110), the detergent is dissolved in the washing water. 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 promotion step (S111), it is preferable to perform step motion in which the laundry rising along the rotating drum is repeatedly dropped out of the inner peripheral surface of the drum by 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 initial stage of the water supplying step (S110), thereby promoting the dissolution of the detergent, thereby improving the washing efficiency.

Generally, the drum is driven by the tumbling motion in the water supply step. That is, as the drum continuously rotates in one direction at a constant speed, the laundry is lifted and the falling motion is performed in the water supply step.

According to the inventors' experiment, it was found that the time required for the detergent to dissolve in the washing water through the tumbling motion was about 15 minutes. That is, it took 15 minutes for detergent solubilization saturation.

On the other hand, it was found through the step motion or the scrub motion that the time required for the detergent solution saturation was 9 to 10 minutes. In other words, it was found that the detergent which was faster through step motion or scrubbing motion was dissolved in the washing water. Therefore, it was found that this motion is very effective because it can shorten the time required to perform a specific washing course as a whole.

This can be attributed to the fact that the impulsive force is applied to the step motion or the scrub motion in the same manner, and the vortex is generated more strongly in the wash water due to the sudden change of the drum rotation such as the rotation and the stop.

On the other hand, it is preferable that the drum driving motion in the detergent dissolution facilitating step S111 is performed differently depending on the material of the laundry. For example, it is preferable that the cloth of the cotton material is performed by scrubbing motion, and the cloth of the synthetic fiber material is performed by the step motion. However, the present invention is not limited to this, and either case can be performed in a scrub motion or a step motion.

The scrub motion is not only a drop of laundry but also a motion that causes laundry to bend and cause friction rubbing. Therefore, an effect of scratching can be expected at the beginning of the washing cycle. However, such motion is preferably performed on a fabric resistant to friction. Therefore, in the detergent dissolution facilitating step S111 of the cotton course, it is more preferable that the drum driving motion is a scrub motion.

On the other hand, the fabric of the synthetic fiber material has a smaller specific gravity than that of the cotton fabric material. In other words, it is lighter. In addition, the water content is lower than that of the material, and the fear of damage to the friction is high. Therefore, it is preferable that the detergent dissolution promotion step (S111) is performed in a step-motion manner in order to prevent the damage of the fabric and promote the dissolution of the detergent. That is, in the detergent dissolution facilitating step S111 of the synthetic fibers, the drum driving motion is preferably a stepping motion. It is possible to accelerate the dissolution of the detergent by applying a dropping impact to the light cloth as much as possible and to expect an effect of being washed in the initial stage of the washing cycle.

Generally, it is difficult to separate the cotton fabric and the synthetic fiber fabric, and to perform the washing by a washing course suitable for each. Because, in everyday life, we wear cotton fabric and synthetic fiber material. Also, it is preferable to wear a cloth mixed with cotton and synthetic fibers. Therefore, in response to such a phenomenon, it is preferable to provide a washing course, that is, a mixing course, which combines advantages of a cotton course and a synthetic fiber course.

This mixed course is very useful for the following reasons.

When the user separates the cloth of the cotton material and the cloth of the synthetic fiber material, the laundry may be held until a certain amount of laundry is collected. Therefore, contaminated laundry may be left unattended for a long time. Of course, if a small amount of laundry is separately washed, excessive energy may be wasted. Accordingly, it is possible to prevent the problem of the laundry being left over and the energy wastage problem through the mixed course which can be washed by mixing the laundry of the most common material.

It is preferable that the drum driving motion in the detergent dissolution facilitating step (S111) of the mixing course is a combination of step motion and scrub motion. In other words, by combining the step motion and the scrub motion which are optimum for the surface material and the synthetic fiber material, it is possible to expect an effective washing effect at the initial stage of washing and promoting dissolution of the detergent. 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.

In the water supplying step (S110), a process of sufficiently wetting the laundry with the 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 (S111) 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.

Meanwhile, the detergent dissolution promotion step (S111) may proceed for about two minutes until the water supply is completed. Of course, in the detergent dissolving promotion step S111, all the water supply can be completed and the water level can be lowered through the capillary in the step described later, so that additional water supply can be performed. Therefore, since the detergent dissolving promotion step (S111) is performed for a relatively short time, the laundry damage at this stage can be ignored. Thus, in all of the above courses, the drum driving motion in the detergent dissolution facilitating step S111 may be scrubbing motion.

After the detergent dissolution facilitating step S111, a step S112 of promoting the capturing step may be performed. That is, it is preferable that the capturing step S112 is 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. That is, the capturing step S112 may be considered as a step of performing the capturing completely. Of course, it may also be done after the water supply is fully completed. Preferably, the water level is lowered in the sedimentation step S112 so that additional water supply will be performed.

In the detergent dissolution promoting step S111, a part of the sediment is formed, and the washing water level rises, so that the washing water is also accumulated in the inside of the drum. Therefore, it is preferable that a step of further accelerating the seeding is performed. It is preferable that the drum driving motion in the sedimentation step S123 is controlled differently from the detergent dissolution facilitating step S111.

The drum driving motion in the seeding step S112 may include rolling motion. In addition, the drum driving motion in the seeding stage 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 operation (S112) may be performed by repeating different drum driving motions, i.e., the filtration motion and the rolling motion, in order.

Here, the rolling motion has a smaller frictional force applied between the laundry than the above-described scrub motion. Rolling motion is performed at the time when most of the trailing edges are formed. Therefore, even if friction is applied between wet laundries, there is very little risk of bubble wrap. For this reason, the spinning step S112 performed in the rolling motion can be performed in the same form regardless of the material of the cloth. That is, regardless of the surface material or the synthetic fiber material, the roll ring motion is preferably performed in the wrapping step S112. Therefore, regardless of whether the user selects any one of the cotton course, the mixed course, and the synthetic fiber course, it is preferable that the rolling motion is performed in the forming step S112 performed after the detergent dissolution facilitating step S111.

Meanwhile, the capturing step S112 may be performed in two stages. For example, if the spraying step (S112) is performed for 10 minutes, the spraying step 1 may be performed for 5 minutes and the spraying step 2 may be performed for 5 minutes. Specifically, the additional feed may be performed in the first stage of the seeding step, and the second seeding step may be performed in the state where the feed is completely terminated.

Here, it is preferable that the drum driving motion is controlled in a different manner in order to more effectively make the detergent dissolving and spreading more effective in the first step and the second step, and to supply the washing water and the detergent evenly to the laundry.

For example, the drum-driven motion in the first stage is the rolling motion, and the drum-driven motion in the second stage is the combination of the rolling motion and the filtration motion (including the circulation phase). That is, the rolling motion can be controlled to be performed at a predetermined operating rate in the first sputtering step, and the rolling motion can be controlled to be repeated four times after the filtration motion is performed four times in the second sputtering step.

In the rolling motion, the contact time between the washing water and the detergent is increased by continuously turning the laundry at the bottom of the drum. The filtration motion spreads the laundry so that the washing water and the detergent are uniformly supplied to the laundry. Therefore, it is possible to effectively form a covering. According to the experiment of the present inventor, it has been found that the time required to complete the spraying in the conventional tumbling motion is about 13 minutes, but it takes about 10 minutes in the embodiment of the present invention.

In addition, the drum driving motion in the first stage of the wrapping can be controlled differently depending on the amount of the drum. For this purpose, the surplus amount sensing step S30 may be performed before the washing step S100. The detection method can be performed by using a current value required to reach a target drum RPM or a time required until the target RPM stops, and various other methods are known. Therefore, detailed description thereof will be omitted.

The drum driving motion in the step S 1 may be changed according to the amount of the laundry sensed in the SQ sensing step S30. For example, in the case of the predetermined amount or more, the drum is driven in the rolling motion as described above, and when the level is less than the predetermined drum-level, the step motion and the rolling motion are combined to drive the drum.

Here, since the step motion lifts the laundry and drops it rapidly, if the amount of the laundry is large, the distance of the laundry to be dropped entirely decreases. Therefore, it is more preferable when the amount is small. However, such step motion may cause damage to the laundry. Therefore, in the case of the cotton course, if the amount is less than the predetermined level, one step of the embossing is performed by a combination of the step motion and the rolling motion, and if the embossing is the predetermined level or more, the embossing step may be performed by the rolling motion. In addition, in a synthetic fiber course and a mixed course where there is a risk of damage to the laundry, a single step of rolling in a rolling motion can be performed irrespective of the amount of the laundry.

On the other hand, it is preferable that the circulation step is performed in association with the drum driving in the water feeding step S110 described above. That is, it is preferable that the circulation step is performed in synchronization with the driving of the motor for driving the drum. In this case, the drum is driven, and laundry water circulated when the laundry flows is supplied to the laundry, so that the purpose of the water supply step can be more effectively achieved.

The washing step S100 includes a main washing step 130. Between the main washing step S130 and the water supplying step S110, a heating step S120 ) 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 S120 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 (S120) .

The heating step (S120) is preferably performed differently depending on the selected driving course.

That is, depending on the material of the laundry, the washing water temperature in the heating step is preferably set differently.

In case of cotton material, it is resistant to heat. The higher the temperature of the washing water, the more easily the detergent dissolves in the washing water and the activation of the detergent is further promoted. Therefore, when the cotton course is selected, the washing water temperature in the heating step (S120) is preferably set to about 60 degrees Celsius. Of course, it is preferable that the temperature of the wash water is selected by the user through the option selection unit 118 from the cold water to 95 degrees Celsius. The higher the washing water temperature, the more the detergent activation is promoted, the washing power is further improved, and the sterilization and bleaching effect can be further increased. However, energy will be consumed proportionally.

On the other hand, synthetic fiber materials are vulnerable to heat. Therefore, it is necessary to prevent the laundry from being damaged due to heat in the synthetic fiber course or the mixed course. When a synthetic fiber course or a mixed course is selected for this purpose, the washing water temperature in the heating step (S120) is preferably set to about 40 degrees Celsius. Of course, it is preferable that the temperature of the wash water is selected by the user through the option selecting unit 118 from the cold water to 60 degrees Celsius. It is preferable to exclude the user's selection higher than 60 degrees Celsius.

The drum driving motion in the heating step (S120) is preferably tumbling motion regardless of the selected course. This is because tumbling motion is a motion to release laundry evenly while reducing damage to laundry. Therefore, the laundry can receive heat sufficiently from the steam or the heated washing water. Also, the circulation step can be performed in the heating step. However, as in this case, the drum drive and the cycling steps can be synchronized. However, it is preferable that the circulation step is performed after a certain amount of initial heating has been performed. Therefore, it is preferable that the circulation step after the lapse of a predetermined time after the start of the first drum driving is synchronized with the drum driving.

When the water supply step S110 and the heating step S120 are completed, the main washing step S130 is performed in which the washing is performed in earnest. By the end of the main washing step S130, Lt; / RTI >

The drum driving motion in the main washing step (S130) may be performed in a sequential combination of rolling motion, tumble motion, and swing motion.

In particular, it is preferable that the drum driving motion in the main washing step (S130) is also performed differently depending on the selected course. This is to ensure both the protection of fabric and the improvement of washing power.

That is, in the case of washing cloth of a cotton material, it is preferable that drum driving motion is performed by washing with a strong mechanical force. In case of washing cloth of a synthetic fiber material, drum driving motion in which laundry is washed with low mechanical force is preferably performed.

The main washing step (S130) is the most time-consuming step in the washing cycle (S100). Therefore, it is preferable that the washing is controlled to be performed most efficiently. In addition, it can be regarded as a stage where the damage is most likely to occur due to a long time.

Accordingly, when the cotton course is selected, it is preferable that the drum is controlled to be driven by the combination of the rolling motion and the tumbling motion in the main washing step (S130). The combination of two different motions can add various types of strong mechanical force to the laundry to further improve the washing effect. In other words, it is preferable that the washing effect is further improved by washing with a strong mechanical force since the property of the cotton material is less likely to damage the cloth.

On the other hand, when the synthetic fiber course is selected, it is preferable that the drum is controlled to be driven by a combination of the swing motion and the tumbling motion in the main washing step (S130). Likewise, the combination of different motions can further improve the washing effect. Here, the swing motion is a type of motion in which the laundry is smoothly shaken to the washing water. Therefore, the damage of the laundry due to the frictional force can be minimized. In addition, it is possible to increase the time in which the laundry contacts with the washing water, thereby improving the washing effect.

It is preferable that the course is prepared differently depending on the material of the cloth, and the drum driving motion is controlled so as to be changed during the washing in each course.

On the other hand, in the case of the mixed course, since the course is prepared for effectively washing both the cotton fabric and the synthetic fiber fabric, it is necessary to improve the washing effect regardless of the material and to minimize the damage of the laundry. Therefore, in order to satisfy this, it is preferable that the drum driving motion in the main washing step in the mixed course is performed by a combination of tumbling motion, swing motion, and rolling motion. That is, it is preferable that a swing motion for preventing damage to the cloth is included, and a rolling motion for further improving the washing power is included.

As described above, it is preferable that the drum driving motion in the main washing step (S130) is controlled such that two or more different motions are combined, even if one of the cotton course, the synthetic fiber course and the mixed course is selected. This is to generate various mechanical forces and flow of washing water, but it is intended to increase the satisfaction to the user visually.

The user can see the laundry washed inside the drum through the door from the outside of the washing machine. The user can see that washing is performed in various motions rather than uniform motion in the drum. This will allow the user to feel that washing is done more effectively emotionally. Therefore, the satisfaction of the user can be further increased.

On the other hand, in the main washing step (S130), if the cotton course is selected, the filtration motion and the tumbling motion may be combined. In this case, the circulation step can likewise be synchronized with the drum drive. In the case of the cotton material, since there is less risk of damaging the laundry, the laundry can be continuously supplied to the washing water and the detergent more efficiently through the filtration motion.

On the other hand, when the synthetic fiber course and the mixed course are selected, swing motion and tumbling motion may be combined in the main washing step (S130). In this case, it is preferable that the swing motion is performed instead of the filtration motion because the laundry may be damaged. Likewise, the cycling step can be synchronized with the drum drive.

As described above, the control method according to the embodiment of the present invention varies the drum driving motions in the water supplying step S110, the heating step S120, and the main washing step S130 constituting the washing cycle S100 Thereby improving the efficiency of the washing process. That is, drum driving motions are changed according to the course selected by the user, thereby improving the efficiency of the washing cycle and preventing the laundry from being damaged.

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, the operating rates in the heating step (S120) and the main washing step (S130) are preferably 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 (S110) is not changed according to the selected degree of contamination. This is because in the water supply step (S110), 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.

In addition, increasing the operating rate means increasing the time for applying the mechanical force to the laundry. Therefore, the greater the operating rate, the greater the risk of damage to the laundry. In view of this, it is preferable that the operating ratio in the washing cycle S100 is controlled differently according to the course selected by the user. That is, it is preferable that the working ratio in the cotton course is controlled to be larger than the working ratio in the synthetic fiber course and the mixing course.

When the above-described washing cycle S100 is completed, the rinsing cycle S200 is performed.

In the rinsing step, the process of rinsing the laundry with the washing water and draining the washing water may be repeated. According to the embodiment of the present invention, it is preferable that the rinsing process is repeated three times in the rinsing cycle. That is, the rinsing process is repeated so that residual detergent and contaminants are reliably discharged from the laundry.

Here, it is preferable that the water level in the rinsing step (S200) is controlled to be higher than the water level in the washing step (S200). That is, it is preferable to control the water level so that the water level inside the drum can be seen from the outside. That is, sufficient washing water is used to further improve the rinsing effect.

The drum driving motion in the rinsing step S200 is preferably tumbling motion. The tumbling motion corresponds to repeating the washing of the laundry into the washing water and the washing of the laundry into the washing water. Thus, along with this tumbling motion, the high water level can indicate that the rinsing is visually sufficient. Therefore, it is possible to display the effect that the rinsing is sufficiently performed emotionally to the user.

Here, the execution of the tumbling motion in the rinsing step (S200) can be considered to be intended not only to improve rinsing but also to prevent overheating of the motor. That is, the water level in the rinsing cycle becomes higher than the water level in the washing cycle. Therefore, the load due to the washing water in the rotating drum can not be increased. The above-mentioned step motion, scrub motion and swing motion are motions that repeat rotation and braking of the motor. Therefore, a large load is generated in the motor due to such braking. In addition, when the washing water level is high, the load due to the washing water may be further increased. Therefore, the drum driving motion in the rinsing step (S200) in which the washing water level is high is preferable for the drum driving motion in which the braking is not accompanied to prevent the motor from overheating, and more particularly, the tumbling motion in which the one- do.

Meanwhile, in the rinsing operation (S200), 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.

When the washing cycle (S100) and the rinsing cycle (S200) are completed, a dewatering cycle (S300) for draining the washing water to the maximum extent is performed. In the dewatering step (S300), the number of revolutions of the drum exceeds 1G, and the washing water is discharged by centrifugal force.

The dewatering step (S300) may specifically include the subtraction (S301), the base (S302), and the pruning step (S303). The step S301 is a step of uniformly dispersing the bobbins in the drum or measuring the eccentricity for the purpose of bouncing, and is a step of accelerating to the drum RPM for bouncing. Therefore, the step S301 includes spinning the drum at about 100 RPM, and the like. If the base is not performed, the step S301 will skip the acceleration step for the base and only spin drive at the low spin-spin RPM will be performed.

When the intervening step S301 is completed, the main-tangling step S302 is performed for a predetermined time.

When the main-forming step S302 is completed, the laundry is attached to the inner peripheral surface of the drum due to centrifugal force or tangled with each other. Therefore, it is very inconvenient when the user takes out the laundry. In order to prevent this, it is highly desirable that the deburring step (S303) is performed after the main body step (S302) is completed. This is to release the tangled laundry and minimize the occurrence of tangles when the laundry is left after the end of the course.

The drum driving in the forging step S303 is preferably a step motion. That is, the most impact is applied to the laundry to release the laundry more effectively. Thus, the user can easily take out the laundry from the drum without any trouble.

On the other hand, it is preferable that the drum RPM in the dewatering stroke is set differently according to the course selected by the user. This is in consideration of water content and crease characteristics depending on the material of the cloth.

Cotton fabrics have a high water content and a relatively low risk of rusting. If it is wrinkled, it can be easily removed. On the other hand, in the case of synthetic fabrics, the water content is low and there is a relatively high risk of rusting.

Therefore, in the case of a cotton course, it is preferable that the predetermined dehydration RPM is set to be higher than that of the mixed course and the synthetic fiber course. The predetermined RPM is preferably 1000 or more. Here, the dehydration RPM can be changed by the user through the option selection unit 118.

On the other hand, the predetermined RPM in the synthetic fiber course and the mixed course can be preset to 400 to 600. In this case, due to the nature of the material, it is possible to discharge the washing water sufficiently even if the washing water is dewatered at a low RPM, so as to prevent wrinkling. Even in this case, the dehydration RPM can be changed by the user through the option selection unit 118. However, it is preferable that dehydration RPM exceeding 800 RPM is not selectable.

Hereinafter, the time management option will be described in detail.

Generally, when a specific course is selected, the operation is started according to a predetermined algorithm, and the operation is terminated after a predetermined time elapses. Here, the operation time required for course execution is preliminarily set by summing the times required for the strokes constituting the course. This operation time can be displayed on the display unit 119. [

On the other hand, depending on the current situation of the user, the operation time required when the course operation is performed during the preset time may be too long. For example, after one hour, it is necessary to go out, and the preset time may be 1 hour and 20 minutes. On the contrary, since the contamination of the laundry is severe, washing may not be performed sufficiently for washing for 1 hour and 20 minutes. To solve this problem easily, a washing machine capable of time management will be needed.

The washing unit according to the present invention may include a time management option in the option unit S118 so that the time management can be performed. That is, it is possible to increase or decrease the operation time of a specific course selected through the time management option selection.

The user can select the time save option through the time management option. Conversely, you can choose the intensive option through time management options. If this option is not selected, the operation will be performed with the preset course. Such a time management selection may be made before the execution of the washing cycle S100 after the selection of the driving course S10.

For example, if the time required to select a course is 120 minutes, the time saving option is 100 minutes. If you select the centralized washing option, the time required can be 140 minutes. Of course, there may be some deviation between the preset time and the actual required time.

Here, it is preferable that the time required in the washing and / or rinsing steps varies depending on the selection of the time saving option. That is, it is preferable that the stroke in which the time required varies depending on the selected course.

For cotton, synthetic fiber and mixed courses, it is important to improve the washing power. Therefore, it is preferable that the time required for the time saving option is selected and the time required for the non-normal washing cycle (S100) is not variable. Therefore, it is preferable that the time required for the rinsing step (S200) is variable.

The rinse cycle (S200) repeats the water supply, drainage, and dehydration, and the rinse is performed twice according to the repetition frequency. It can be said that the rinse cycle is performed three times or four times. The dewatering may be performed in the same order as the dewatering step (S300) described above. However, the RPM in the base and the base time may be less than the dehydration stroke (S300).

Therefore, if the time saving option is selected, it is preferable that the rinsing step is omitted.

Conversely, if the concentrated washing option is selected, it is possible to increase the number of rinsing times by one or increase the time required for the washing cycle in the rinsing cycle. Of course, it is also possible to increase both.

Such a time management option would be very convenient, allowing the user to make time management while meeting the purpose of a particular course.

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 motion 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.

≪ Description of reference numerals &

110: cabinet 120: tub

130: drum 140: motor

Claims (26)

Selecting a course to be operated among a plurality of driving courses from a user; A washing and drying step of driving the drum so that the motion (drum driving motion) of the laundry flows in the drum according to the selected course; A rinsing step in which rinsing is performed; And And a dehydration step in which dehydration is performed, Wherein the plurality of driving courses include a cotton course, a mix course and a synthetic course, respectively, for a laundry material of a surface material, a synthetic fiber material, and a laundry material mixed with the material, Wherein the drum driving motion in the washing step of the cotton course includes rolling motion, Wherein the drum driving motion includes a swing motion in the washing and running step of the synthetic fiber course. delete The method according to claim 1, Wherein the washing and rinsing step includes supplying a washing water and a detergent to the tub or the drum to dissolve the detergent in the washing water. The method of claim 3, Wherein the drum driving device drives the drum so that the drum driving motion to the water supplying step is changed according to the selected course. The method of claim 3, Wherein the drum driving motion is a scrub motion, a step motion, or a combined motion of the sequences according to the selected course. The method according to claim 1, Wherein the washing and rinsing step includes a rinsing step of supplying washing water and a detergent solution to the laundry. The method according to claim 6, Wherein the drum driving motion includes a rolling pattern in the seeding step. 8. The method of claim 7, Wherein the step of spraying includes a circulation step of circulating the washing water and the detergent solution in the tub to the laundry in the drum. 9. The method of claim 8, Wherein the circulation step is performed when the drum driving motion is at least a filtration motion. 10. The method of claim 9, Wherein the rolling motion is performed after the filtration motion is performed in the circulation step. The method according to claim 6, Wherein the washing and rinsing step includes a main washing step of washing the laundry by driving the drum after the filling step. 12. The method of claim 11, Wherein the washing and rinsing step includes a heating step of raising the temperature of the washing water or the atmospheric temperature in the drum by driving the steam generator or the tub heater before the main washing step after the filling step, Way. 12. The method of claim 11, Wherein the drum driving motion in the main washing step includes a tumbling motion. 14. The method of claim 13, Wherein the drum driving motion in the main washing step drives the drum so that the drum driving motion is changed according to the selected course. delete delete delete The method according to claim 1, Wherein the drum driving motion includes an order combination motion of a rolling motion and a swing motion in the washing / The method according to claim 1, The predetermined value is set at least at any one of the drum RPM, the running time of the course or the running rate (on / off ratio of the motor driving the drum) in the spinning course in the cotton course of the cotton course, synthetic fiber course and mixed course Wherein the control unit controls the drum washing machine.  The method according to claim 1, The washing and rinsing step includes supplying a washing water and a detergent to the tub or the drum to dissolve the detergent in the washing water, Wherein the drum driving motion in the water supply step is a combination motion of scrub motion in the face course, step motion in the synthetic fiber course, and scrub motion and step motion in the mixed course. 21. The method of claim 20, Wherein the drum driving in the rinsing step is performed in a tumbling motion at a water level higher than the water level in the washing cycle irrespective of the selected course. The method according to claim 1, Wherein the step of detecting the laundry amount is performed before the washing cycle. 23. The method of claim 22, Wherein the controller controls the drum driving motion in the water supplying step for supplying the washing water and the detergent to the drum according to the sensed amount of the laundry to dissolve the detergent in the washing water. 24. The method of claim 23, Wherein the dewatering and discharging step is terminated at a step where the drum is driven in a stepping motion and the pulverizing is performed. The method according to claim 1, Wherein the step of selecting time management is performed so as to vary the time required for at least the washing and rinsing cycles before the washing cycle so as to reduce or extend the entire course driving time. 26. The method of claim 25, Wherein when the course operation time is reduced in the time management selection step, bumping in the rinsing cycle is omitted, and when the course operation time is increased, the time of the washing cycle and the number of times of the rinsing cycle are increased.

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