KR101690617B1 - Controlling Method of Washing Machine - Google Patents

Abstract

The present invention relates to a control method of a washing machine for providing a control method of a washing machine capable of easily removing a stain on a laundry, And the washing process includes driving the drum in various motions.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a control method for a washing machine, and more particularly, to a control method for a washing machine for easily removing a stain.

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-mentioned 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 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.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art.

Another object of the present invention is to provide a control method for a washing machine including a washing cycle in which the temperature of the washing water is divided into three stages in order to improve the removal performance.

Another object of the present invention is to provide a control method of a washing machine which drives a drum in various motions (defined as a combination of a rotating direction and a rotating speed of the drum) in order to improve a stain removal performance.

In order to solve the above-mentioned problems, the present invention provides a washing machine comprising a cabinet, a tub provided inside the cabinet, a drum rotatably installed inside the tub, a drum accommodating the laundry, a motor connected directly to the rotary shaft of the drum, A plurality of drum driving motions are defined according to a rotational direction and a rotational speed of the drum, and at least one of the drum driving motions defined according to the type of the laundry is selectively Wherein the drum driving motion includes at least one strong motion rotating at a rotational speed having a centrifugal force of 1 G or more in at least a predetermined rotation section when the drum makes one rotation, At least one medicine rotating at a rotational speed having a centrifugal force of 1 G or less Wherein the control unit is configured to drive the drum in accordance with a combination of the strong motion and the standard motion at a predetermined stage included in a washing cycle of a predetermined course selected by the course selecting unit, And a washing step of washing the laundry.

According to the present invention, it is possible to provide an effect of providing a control method of a washing machine which can easily remove a stain on laundry.

In addition, the present invention can provide a control method for a washing machine including a washing cycle when the temperature of the washing water is divided into three levels in order to improve the removal performance at the time of stain.

Further, the present invention can provide an effect of providing a control method of a washing machine that drives a drum in various motions (defined as a combination of a rotating direction and a rotating speed of the drum) in order to improve a stain removal performance.

1 is a perspective view of a washing machine.
2 is a view showing a drum motion used in a control method of the washing apparatus of the present invention.
3 is a detailed view of the step motion.
4 is a detailed view of the scrub motion.
Fig. 5 is a graph comparing cleaning power and vibration level of each motion.
FIG. 6 is a flowchart showing a control method of the washing apparatus of the present invention.

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 control unit (not shown) 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, 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 130 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 130 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 130 rises a predetermined height along the rotating direction of the drum 130, 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 in the drum 130 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 130 by about 46 RPM, the laundry falls in the direction of the lowest point of the drum at a rotation angle of about 90 to 110 degrees from the lowest point of the drum.

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 is dropped after a point 90 degrees in the rotational direction of the drum has passed.

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 after the laundry passes through the 90-degree counterclockwise point of the drum, so that the laundry drops to the lowest point of the drum after passing a 90-degree counterclockwise point 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 after the laundry passes the 90-degree clockwise point of the drum, so that the laundry falls in the direction of the lowest point of the drum at a position passing the 90-degree clockwise position 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 to drop laundry at a position of about 90 degrees or more in the rotating direction of the drum through reverse phase braking.

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 widens the surface area of the laundry in contact with the washing water, and allows the washing water to penetrate through the laundry, so that the washing water can be supplied to the laundry evenly.

The method of spraying the washing water to the drum in the filtration motion may be realized by circulating and circulating washing water stored in the tub by using a circulation channel (not shown) and a pump (not shown).

Meanwhile, the filtration motion may be performed so as to cause the laundry to closely contact with the inner circumferential surface of the drum without spraying the washing water. In order to induce the bubble dispersion, the filtering motion may be applied to induce the bubble dispersion in the post- .

In addition, the filtration motion may be implemented by spraying clean wash water supplied from an external water source without circulating the wash water stored in the tub. In order to distinguish the wash water stored in the tub from the case of circulating the wash water, (Spary Rinse motion). The spray rinse motion is motion suitable for a stroke requiring rinsing because it uses clean wash water.

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-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.

FIG. 6 is a flowchart showing a control method of the washing machine including a stain removal course. FIG. 6 is a flowchart showing a control method of the washing machine including a stain removal course. (S50, 50 '), a rinsing cycle (S60) for rinsing the laundry, and a dewatering cycle (S70) for removing washing water from the laundries, when the drum is rotated to separate the stains from the laundry .

The user can select the stuck-away course through an operation button provided on the control panel 115 of FIG.

When the picked-up course is selected, a picking-up sensing step (S20) for judging the amount (amount of laundry) charged in the drum 130 proceeds. The surplus amount sensing step S20 may be performed through various methods such as a method of using the time taken to rotate the drum 130 to a predetermined position, a method of using the time required for rotating the drum 130 for a predetermined time, have. Also, the surplus amount sensing step (S20) may be performed before the stubbornly removed course selection step (S10).

S50, S60, and S70 are performed for a small amount of laundry when the amount of the laundry measured in the laundry detection step S20 is smaller than the reference value. If the laundry amount is greater than the reference value, The sludge removal course (S40 ', S50', S60, S70) proceeds.

The control method of the washing apparatus of the present invention provides a washing course applicable to both small amount and mass laundry, but the drum motion realized in each washing step is changed according to the measured laundry amount.

First, a case in which the amount of measurement measured in the detection step (S20) is smaller than the reference value will be described.

If it is determined that the quantity is less than the reference value, the controller (microcomputer or the like) controls the water supply device (water supply channel, water supply valve, etc.) connected to the water supply source and the tub so as to supply the washing water to the tub .

In the supplying step S40, the controller controls the motor 140 to advance the drum 130 in the tumbling motion, the step motion, the scrub motion, the filtration motion, and the rolling motion.

The water supply step S40 is a step for supplying washing water required for washing to the tub 120 and wetting the laundry charged in the drum 130 with washing water. Therefore, by providing the filtration motion in the water supply step S40, it is possible to facilitate the filling.

Meanwhile, since the step motion and the scrub motion can easily remove insoluble dirt such as soil by applying a falling impact to laundry laid on the drum, the motor 140 is controlled so that the filtering motion is performed after the step motion and the scrub motion are performed It is possible to remove insoluble dirt in the water supply step, thereby improving the cleaning ability and reducing the washing time.

In addition, since the laundry may be eccentrically rotated when the laundry loaded in the drum is tangled, the water supply step S40 may be controlled so that the drum 130 advances in the tumbling motion before the step motion and the scrub motion are performed. The tumbling motion is a motion to rotate the drum in one direction and drop the laundry to the lowest point of the drum at a position of about 90 degrees in the rotating direction of the drum, so that the laundry tangled can be dispersed.

If the washing water is supplied in the water supply step S40, detergent necessary for washing is also supplied, but it takes a predetermined time for the detergent to dissolve in the laundry. If the washing process is performed while the detergent is not completely dissolved in the washing water, the detergent may remain in the laundry after the washing process. Therefore, it is preferable that the water supply step (S40) drives the drum 130 in a rolling motion suitable for dissolving detergent and covering the washing water before the water supply of the washing water is completed.

After the completion of the water supplying step S40, the washing step S50 is carried out. The washing step S50 is characterized in that the washing water having different temperatures is supplied to the washing step S51, the dirt removing step S52) and the residual dirt removing step (S53), respectively.

The calling step S51 is a step of calling the stain time included in the laundry by using cold water. The use of the cold water (about 15 degrees Celsius) in the above-mentioned step S51 takes into consideration the case where the protein component is contained in the laundry for a long time. When a stain containing a protein component is contacted with hot water, it is fixed to the laundry and is difficult to separate from the laundry. Therefore, the above-mentioned step () is carried out for a predetermined time using cold water in order to prevent the staining of the protein component from sticking to the laundry.

In this case, the control unit controls the motor 140 so that the drum 130 is driven in step motion. Of course, the tumbling motion and the rolling motion may be additionally performed after the step motion. The step motion has an excellent cleaning power and is a motion that can shorten the washing time, so that the stain on the laundry is called and the laundry is shocked to induce the stain to be separated from the laundry.

After the above-mentioned step S51, the washing water is heated to a temperature within the range of 40 degrees to 36 degrees, and a dirt removing step (S52) is performed. In the dirt removing step (), the temperature of the wash water is set between 36 degrees C and 40 degrees C to wash the dirt easily removed at a temperature similar to the body temperature, such as sebum components contained in the batter. The method of raising the temperature of the washing water up to the set temperature can be carried out through a heating device provided on the bottom of the tub or a steam generating device capable of supplying steam to the inside of the tub.

In the dirt removing step S52, the controller may control the motor 140 so that the drum 130 can be driven in the tumbling motion and the rolling motion. The tumbling motion and the rolling motion can be expected to reduce the washing time because the motor load is low, and the high washing power and the washing time can be shortened.

After the dirt removing step (S52), the washing water is heated up to about 60 degrees so as to sterilize and bleach the laundry (S53). In the residual dirt removing step (S53), the temperature of the washing water can be increased to about 60 degrees Celsius or more, so that the laundry can be sterilized and bleached.

In the residual dirt removing step S53, the control unit may control the drum 130 to be driven in step motion, or may control step motion, tumbling motion and rolling motion to proceed sequentially.

The rinsing cycle S60 and the dewatering cycle S70 are continued after the dirty laundry cycle S50, which includes the dubbing step S51, the dirt removing step S52, and the residual dirt removing step S53, The rinsing cycle S60 is a cycle for draining washing water used in the washing cycle () to remove dirt and detergent remaining in the laundry after the washing water is re-supplied, and the dewatering cycle (S70) And the washing water is removed from the completed laundry.

Hereinafter, a control method of the washing apparatus for performing the removal course when the amount of laundry measured in the discharging amount sensing step (S20) is greater than a predetermined reference value will be described.

If the measured quantity is larger than the predetermined reference value as compared with the case where the quantity measured in the quantity sensing step S20 is smaller than the preset reference value, the step motion performed in the laundry stroke (S50) The difference is that it does not proceed.

The step motion is characterized in that the washing force is increased by applying impact to the laundry inside the drum by the dropping. If the laundry is heavy, it is not easy to drop the laundry at the highest point of the drum to impact the laundry. .

If the quantity is greater than or equal to the reference value, the motor 140 controls the drum to be driven in the tumbling motion, the filtration motion, and the tumbling motion in the water supply step S40 '.

The step S51 'of the washing step S50' after the watering step S40 'is driven by the tumbling motion and the rolling motion of the drum, and the step of removing the dirt S52' causes the drum to be driven in the tumbling motion , And the residual dirt removing step (S53 ') drives the drum by the filtration motion and the tumbling motion.

The description of the drum motion performed in each step and each step and the rinsing and dewatering steps performed after the dirty washing step S50 'are the same as those described in the case where the amount is smaller than the reference value .

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.

110 ... cabinet 120 ... tub
130 ... Drum 140 ... Motor
115 ... Control panel

Claims (15)

cabinet;
A tub disposed inside the cabinet;
A drum rotatably installed in the tub to receive an object to be cleaned;
A motor directly connected to the rotary shaft of the drum;
A course selection unit for selecting at least one of a plurality of courses; And
And a control unit for defining a plurality of drum driving motions according to a rotational direction and a rotational speed of the drum and selectively controlling at least one of the drum driving motions according to the type of the laundry to control the motor ,
Wherein the drum driving motion controls the drum to rotate in only one direction and rotates the drum at a speed at which the laundry does not fall off the outer circumferential surface of the drum due to the centrifugal force, And step motion for braking the motor before reaching 180 degrees,
Wherein the control unit includes a step of driving the drum so that the step motion is repeatedly performed in a washing cycle of a predetermined course selected by the course selecting unit. The method according to claim 1,
Wherein the selected course is a course when stained. The method according to claim 1,
Wherein the drum driving motion includes a rolling motion and a swing motion,
Wherein the controller further comprises driving the drum in accordance with at least one of the rolling motion and the swing motion in a washing cycle of a predetermined course selected by the course selecting unit. The method of claim 3,
Wherein the driving time of the step motion is shorter than the driving time of the rolling motion or the swing motion. The method according to claim 1,
Wherein the drum driving motion further comprises a scrub motion. delete delete The method according to claim 1,
Wherein the control unit brakes the drum until the drum stops when the drum is braked to have a centrifugal force of 1G or less. 9. The method of claim 8,
Wherein the controller controls the drum to stop when the rotational angle of the drum reaches substantially 180 degrees with respect to the rotational direction. 9. The method of claim 8,
Wherein the control unit applies a predetermined torque in a direction opposite to a rotating direction of the drum when the drum is braked. delete delete 10. The method of claim 9,
Wherein the laundry in the drum drops when the rotation angle of the drum reaches substantially 180 degrees. The method according to claim 1,
The drum-
The drum is rotated in one direction to rotate the drum at a speed at which the laundry does not fall off the outer circumferential surface of the drum due to the centrifugal force and the laundry is moved between a point of 90 degrees with respect to the rotating direction of the drum and the highest point of the drum And braking the motor to drop the laundry when the washing machine is in operation .
The drum is rotated in the opposite direction and the drum is rotated at a speed at which the laundry does not fall from the outer circumferential surface of the drum due to the centrifugal force so that the laundry is rotated 90 degrees from the lowest point of the drum And braking the motor to drop the laundry when it is between the first and second wheels.
And repeating the steps, wherein the scrub motion comprises:
And the control unit includes a step of driving the drum so that the scrub motion is executed in a washing cycle of a predetermined course selected by the course selecting unit. 15. The method of claim 14,
Wherein the control unit applies a predetermined torque in a direction opposite to a rotating direction of the drum when the drum is rapidly braked.

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