KR20180130482A - Control Method for Laundry Treating Apparatus - Google Patents

Abstract

The present invention relates to a garment processing apparatus control method, and more specifically, to a garment processing apparatus control method for preventing motor overload. According to an embodiment of the present invention, a garment processing apparatus includes: a tub storing washing water; a drum which is arranged in the tub to rotate; a pulsator arranged in the drum to rotate; a sub-drum which is detachably coupled to the inner peripheral surface of the drum while storing the washing water; and a driving unit for rotating the drum and the pulsator. The garment processing method which executes a washing or rinsing operation by executing a basket motion of generating flows of the washing water in the sub-drum and the drum at the same time based on driving of the drum and the sub-drum together, and a pulsator motion of generating flows of the washing water in the drum based on driving of the pulsator, includes: a water flow step of generating the basket motion and the pulsator motion; and a cooling step for executing after the water flow step to lower the temperature of the driving unit raised in the water flow step. In the cooling step, the driving unit operates with a load lower than that of the basket motion and the pulsator motion or stops an operation.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a control method of a garment processing apparatus, and more particularly, to a control method of a garment processing apparatus for preventing motor overload.

Generally, a clothes processing apparatus includes a washing machine for performing washing, a dryer for performing drying, and a drying and washing machine for drying and washing together.

When the clothes processing apparatus is used as a washing apparatus, the clothes processing apparatus includes a cabinet forming an outer appearance, a tub accommodated in the cabinet for receiving the washing water, a drum rotatably installed inside the tub to accommodate the laundry, and a cabinet So that the laundry can be drawn in and out.

The clothes processing apparatus may be divided into a top loading type in which the rotary shaft of the drum is perpendicular to the paper surface and a front loading type in which the rotary shaft of the drum is arranged to be horizontal with respect to the paper surface.

In the front loading type, the rotating shaft of the drum is formed substantially horizontally with respect to the paper surface, and the detergent, the washing water, and the drum are rotated by receiving the driving force of the motor in the state that the laundry is put in the drum, So that the laundry is washed by the drum washing method. The drum washing method has almost no damage to the laundry, the laundry is not tangled with each other, and the washing effect of tapping and rubbing can be obtained.

In the top loading type, the rotary shaft of the drum is formed substantially perpendicular to the paper surface, the drum is provided inside the tub where the wash water is stored, the laundry is washed in the state where the laundry is immersed in the wash water supplied into the drum, It is divided into a pulsator method and an agitator method. The pulsator method is a method of performing washing by rotating washing water and laundry with a pulsator rotatably provided on the bottom of a drum to receive laundry and washing water from inside of the washing machine, The washing water and the laundry to be washed are rotated by the agitator protruding upward to execute washing.

The top loading type is provided at the lower part of the drum or the rotation of the drum, and washing is performed by the friction between the laundry and the laundry and the action of the detergent by the rotation of the pulsator or the agitator forming the water stream. Therefore, since washing can be performed only when washing water is supplied to the laundry so as to be submerged in the washing water, a large amount of washing water is used.

In the conventional clothes processing apparatus, the laundry is washed in one drum, that is, washing, rinsing and dewatering. Therefore, if the laundry is separated and washed according to the color or the material of the laundry, the number of times of operating the clothes processing apparatus is increased because at least two washing processes must be performed, thereby wasting washing water, detergent and energy.

In recent years, a sub-drum, which is detachably installed in the drum, has been added and used to improve this point. The sub-drum can store the wash water separately from the tub, and the water can be formed in the sub-drum by the rotation of the sub-drum to perform the washing process separately from the drum.

However, it is difficult to provide a separate device for generating a vortex such as a pulsator installed in a conventional drum because the capacity of the sub-drum is small, and the occurrence frequency of the vortex due to the rotation of the sub-drum is relatively low as compared with that of the main drum , There is a problem that the washing performance by the sub drum is not sufficient.

Further, in order to perform a washing or rinsing cycle by rotating the sub-drum after the washing water is supplied to the tub and the sub-drum, the drum coupled with the sub-drum must be rotated. Therefore, when the drum is rotated to rotate the sub-drum after supplying the washing water to the drum and the sub-drum, respectively, friction between the drum and the tub contained in the tub and friction between the inner surface of the sub- Further, since a force as much as the weight of the washing water accommodated in the sub-drum is additionally applied to the motor, a load is applied to the motor for rotating the drum so that the temperature of the motor is excessively increased.

An object of the present invention is to provide a control method for a garment processing apparatus which prevents overheating of the motor due to overload when the drum and the sub drum are simultaneously rotated while the washing water is received in the tub and the sub drum.

It is another object of the present invention to provide a control method of a clothes processing apparatus in which the washing power is maintained while preventing the temperature of the motor from rising excessively.

According to an aspect of the present invention, there is provided a washing machine comprising a tub for receiving washing water, a drum rotatably installed in the tub, a pulsator rotatably installed in the drum, And a driving unit for rotating the drum and the pulsator, the method comprising the steps of: rotating the drum and the sub-drum such that the drum and the sub- A basket movement in which a washing water flow is simultaneously formed in the inside of the drum, and a pouring water flow in which a washing water flow is formed in the drum as the pulsator rotates, step; And a cooling operation which is performed after the start of the water flow forming step and in which the driving part is stopped so that the temperature of the driving part raised by the execution of the water flow forming step is lowered or the output amount is less than a reference value applied to the driving part in the water flow forming step, The method comprising the steps of:

The water flow forming step may be such that the total sum of times during which the pulsator motion is performed is greater than the total sum of times during which the basket motion is performed.

The cooling step may include an additional watering step including an operation in which the drum and the pulsator do not rotate when washing water is added to the drum.

The additional watering step may be performed between the basket motion and the pearl effect motion.

The additional feed step may be performed between the basket motions.

The additional feed step may be performed between the pulsator motions.

Measuring the water level of the tub while the stop motion is performed such that the drum and the pulsator are not rotated for a predetermined time; And an angle control unit for controlling the drum to rotate and braking the drum so that the water supply guide formed on the sub drum and guiding the wash water to the drum is positioned below the single water supply unit when the measured level of the tub is lower than the reference value, And supplying wash water to the tub while motion is being performed.

Wherein the cooling step includes a stopping step in which at least one of a stop motion in which the drum and the pulsator are not rotated and a low-speed rotation motion in which the drum repeats forward rotation and reverse rotation at rpm below the reference value is performed have.

The dormant step may be performed between the basket motion and the pulsator motion.

The cooling step includes an operation in which the drum and the pulsator do not rotate when washing water is added to the drum; And a dormant step in which at least one of a stop motion in which the drum and the pulsator are not rotated and a low-speed rotation motion in which the drum repeats normal rotation and reverse rotation at rpm less than the reference value is performed, And the dormant step are each performed one or more times, and at least one of the basket motion and the pulsator motion may be performed between the additional watering step and the dormant step.

The cooling step may further include a deburring step in which the pulsator repeatedly performs forward rotation and reverse rotation so that the laundry contained in the drum is uniformly dispersed in the drum.

Wherein the balancing motion is performed at least once and the additional watering step is performed in an early stage washing process that ends before a later (late) washing process or a later (late) washing process in which the forging process is performed, May be carried out in an administrative or early rinse cycle.

Wherein the cooling step further comprises at least one of a stop motion in which the drum and the pulsator are not rotated and a low-speed rotation motion in which the drum repeats normal rotation and reverse rotation at rpm less than the reference value, , The forging step may be performed between the pearlizing motion and the dormant step.

The water flow forming step may further include a dehydrating step of dehydrating the washing water from the tub and the sub drum after the basket motion is performed last and after the end of the water flow forming step.

In the dewatering step, a drain pump may be operated to drain laundry water from the turbine to reduce a load applied to the driving unit.

The washing machine includes a tub for receiving the washing water, a drum rotatably installed in the tub, a pulsator rotatably installed in the drum, a detachable coupling member for detachably connecting the drum to the inner circumferential surface of the drum, A method of controlling a clothes processing apparatus including a drum and a driving unit for rotating the drum and the pulsator, wherein the water and the water are simultaneously formed in the drum and the sub-drum as the drum and the sub-drum rotate together A first water flow forming step in which a washing or rinsing stroke is performed by basket motion; And a second water flow forming step in which a washing or rinsing step is performed by pearl sequential motion in which water is generated in the drum as the pulsator rotates, And the second water flow forming steps are performed a plurality of times, respectively, so as to solve the above-described problems.

The total sum of times during which the second water flow forming step is performed may be greater than the total time during which the first water flow forming step is performed.

And an additional water supplying step including an operation in which the drum and the pulsator are not rotated when washing water is added to the drum.

The additional water supplying step may be performed at least once between the first water flow forming step and the second water flow forming step.

The additional feed step may be performed more than once between the basket motions of the first water flow forming step.

The additional feed step may be performed more than once between the pulsator motions of the second water flow forming step.

Measuring the water level of the tub while the stop motion is performed such that the drum and the pulsator are not rotated for a predetermined time; And an angle control unit for controlling the drum to rotate and braking the drum so that the water supply guide formed on the sub drum and guiding the wash water to the drum is positioned below the single water supply unit when the measured level of the tub is lower than the reference value, And supplying the wash water to the tub after the motion is performed.

Wherein the drum and the pulsator are rotated between a first water flow forming step and a second water flow forming step, wherein the drum and the pulsator are rotated at a low speed rotating motion in which the drum repeats forward rotation and reverse rotation at rpm less than the reference value, May be further performed.

The additional watering step and the dormant step are each performed one or more times, and at least one of the first water stream forming step and the second water stream forming step may be performed between the additional water supplying step and the dormant step.

Further comprising a deburring step in which balance pulsing is performed such that the pulsator repeatedly rotates forward and reverse to uniformly disperse the laundry contained in the drum in the drum, wherein the pulverizing step is performed at least once, The additional water supply step may be performed in an early (early) rinse cycle or in an early (early) rinse cycle that ends before the start of a later (late) or later (late) rinse cycle in which the forging process is performed.

The capturing step may be performed before the dormant step after the second water flow forming step.

A drainage step of draining the wash water by operating a drain pump after performing the first water flow forming step; And a dehydrating step of dehydrating the wash water from the tub and the sub drum after performing the step of draining the wash water.

The dehydrating step may drain the washing water from the tub by operating the drain pump to reduce the load applied to the driving unit.

The present invention provides a control method of a clothes processing apparatus that prevents a temperature of a motor from rising excessively when a drum and a sub drum are simultaneously rotated while accommodating washing water in a tub and a sub drum.

Further, the present invention has an effect of providing a control method of a clothes processing apparatus in which the washing power is maintained while preventing the temperature of the motor from rising excessively.

1 is a cross-sectional view schematically showing a configuration of a clothes processing apparatus according to an embodiment of the present invention.
Fig. 2 is a perspective view showing the sub-drum shown in Fig. 1. Fig.
3 is a cross-sectional view along the line AA shown in Fig.
4 is a plan view showing a sub-drum mounted on the drum.
5 is a block diagram showing a configuration of a clothes processing apparatus according to an embodiment of the present invention.
6 is a flowchart illustrating a step of determining whether a sub-drum is mounted on the drum.
7 is a flowchart showing a control method of a garment processing apparatus according to an embodiment of the present invention.
FIG. 8 and FIG. 9 are graphs schematically illustrating changes in temperature of a driving unit when a control method of a garment processing apparatus according to another embodiment of the present invention is applied.

It is to be understood that the embodiments described below are provided for illustrative purposes only, and that the present invention may be embodied with various modifications and alterations. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention. In addition, the attached drawings are not drawn to scale in order to facilitate understanding of the invention, but the dimensions of some of the components may be exaggerated.

The first and second terms used in the present application can be used to describe various elements, but the elements should not be limited by terms. Terms are used only to distinguish one constituent from another constituent.

Furthermore, the terms used in the present application are used only to describe specific embodiments and are not intended to limit the scope of the rights. The singular expressions include plural expressions unless the context clearly dictates otherwise. It should be understood that the terms "comprises", "comprising" or "comprising" in this application are intended to specify the presence of stated features, integers, steps, operations, components, components, But do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

1 is a cross-sectional view schematically showing a configuration of a clothes processing apparatus 1 according to an embodiment of the present invention.

Referring to FIG. 1, a clothes processing apparatus 1 according to an embodiment of the present invention includes a cabinet 10 having an opening to allow laundry to be loaded therein, a door 10, A tub 20 installed in the tub 20 to store washing water in the cabinet 10 and a drum 30 and a pulsator 35 to generate a driving force, A drum 30 connected to the driving unit 14 and washing the laundry while being rotated by the driving force transmitted from the driving unit 14, a driving unit 14 rotatably installed in the drum 30, And a sub drum 50 detachably installed in the drum 30 and separated from the drum 30 by the washing of the laundry 30, do.

In this specification, the washing water for washing and the washing water for washing the door are all called washing water, and the drum 30 can be called a main drum.

1 is a direct drive type structure in which a motor is directly connected to a rotary shaft 17 to drive the drum 30, but the garment processing apparatus 1 according to an embodiment of the present invention is not necessarily limited to this.

The cabinet 10 forms an outer appearance of the clothes processing apparatus 1 and includes a cabinet cover 11 having an opening communicating the inside and the outside of the cabinet 10 for inputting laundry.

The cabinet cover 11 is provided at an upper end of the cabinet 10, and a door (not shown) is rotatably provided on the cabinet 10 so as to selectively open and close the opening. Accordingly, the user can open or close the door to put the laundry into the drum 30 and the sub-drum 50, or to remove the laundry from the drum 30 and the sub-drum 50.

On the other hand, the water supply portion 18 is provided on the cabinet cover 11 to supply clean water containing no detergent or clean water to the drum 30 and the sub drum 50. The wash water discharged from the water supply unit 18 is selectively supplied to the drum 30 or supplied to the sub drum 50 through the inside of the tub 20 according to the rotation of the sub drum 50 to be described later.

The tub 20 is formed in a cylindrical shape with an open upper part and is formed to receive the washing water while being provided in the cabinet 10. The tub 20 includes a tub cover 21 provided at an upper end thereof.

The tub cover 21 is formed with a laundry inlet 580 at a position corresponding to the opening of the cabinet 10 so that the drum 30 and the sub-drum 50 communicate with the outside.

The tub cover 21 includes a cover bent portion 21a formed on the inner circumferential surface of the laundry inlet 580 and inclined downward toward the inside of the tub cover 21. [

The cover bent portion 21a circulates along the inner circumferential surface of the tub 20 by the rotational force of the drum 30, and the rising wash water is drawn into the drum 30 to be dropped. At this time, the sub-drum 50 is preferably not mounted on the drum 30. [

The lower surface of the tub 20 is elastically supported by a spring 24 and a damper 23 installed inside the cabinet 10. [ Further, since the lower surface of the tub 20 is directly supported by the spring 24 and the damper 23, it can not rotate itself. Therefore, unlike the drum 30, the tub 20 does not receive a separate rotational force from the driving unit 14. 1, the spring 24 and the damper 23 are connected in series to the lower surface of the tub 20, but the present invention is not limited thereto. The spring 24 and the damper 23 may be connected in parallel The damper 23 is connected to the lower surface of the tub 20 and the spring 24 is connected to the upper surface of the tub 20 and vice versa.

A drainage device for draining water is connected to the lower surface of the tub 20. The drainage device includes a drain pump 11 for supplying power for discharging the washing water accommodated in the tub 20, a laundry pump 20 connected to the lower side of the one end of the tub 20 and the other end connected to the drain pump 11, A first drain pipe 12 for guiding the water to the drain pump 11 and one end connected to the drain pump 11 and the other end connected to one side of the cabinet 10 to supply the wash water from the drain pump 11 to the cabinet 10, And a second water pipe 13 for discharging the water to the outside. The first drain pipe 12 may be formed of a bellows pipe so that the vibration of the tub 20 is not transmitted to the drain pump 11.

The driving unit 14 includes a motor composed of the rotor 15 and the stator 16 and a rotary shaft 17 connected to the rotor 15. The driving unit 14 includes a clutch (not shown) And to the pulsator 35. For example, as the rotary shaft 17 selectively engages the drum 30 while being fixed to the pulsator 35, the driving unit 14 transmits the driving force to the pulsator 35 or the pulsator 35 and the drum 30, It is possible to transmit the driving force to the motor 30 together. As another example, as the rotary shaft 17 is selectively fixed to the pulsator 35 while being fixed to the drum 30, the driving unit 14 transmits the driving force to the drum 30 or the pulsator 35 and the drum 30 as well.

The rotary shaft 17 is fixed to one of the pulsator 35 and the drum 30 and is selectively coupled to the other one of the pulsator 35 and the drum 30. However, The structure for selectively coupling to only one of the first and second substrates 30 is not excluded.

The clothes processing apparatus 1 according to an embodiment of the present invention includes a drum 30 that is rotatably provided in the tub 20 to be charged with laundry and a sub drum 30 that is detachably installed in the drum 30, (50).

The lower surface of the drum 30 is directly connected to the rotary shaft 17 and receives rotational force from the driving unit 14. The drum 30 has a cylindrical shape with a substantially circular cross section.

The drum 30 is formed in a cylindrical shape with an open top, and a plurality of through holes 33 are formed on the side wall, that is, the main surface of the drum. The drum 30 communicates with the tub 20 through a plurality of through holes 33. Accordingly, when the washing water is supplied to the tub 20 at a certain level or more, the drum 30 is immersed in the washing water, and some washing water is drawn into the drum through the through holes 33.

The drum 30 includes a drum cover 31 provided at an upper end thereof. The drum cover 31 is formed in the shape of a ring having a hollow and is disposed on the lower side of the tub cover 21. The discharge passage 47 extending in the horizontal direction is formed by the upper surface of the drum cover 31 and the lower surface of the tub cover 21. [ The discharge flow path 47 guides the wash water discharged to the outside through the side surface of the sub drum 50 into the inside of the tub 20.

The drum cover 31 is formed with an opening through which the laundry can be inserted or the sub drum 50 can be mounted. The drum cover 31 is provided with a balancer 311 on the inner side for eliminating unbalance caused by the load of the laundry in the first drum.

The drum cover 31 is provided with a first concavo-convex portion 315 on the inner circumferential surface thereof so that the sub-drum 50 can be detached from the first concavo-convex portion 315. The fixed portion 93 of the sub- So that the drum 30 is prevented from moving upward. Here, the fixing part 93 is capable of being pulled out from the sub drum 50 in a flexible manner in conjunction with the handle 510.

5) and the braking unit 110 (refer to FIG. 5) for controlling the entire washing process, as well as a water supply unit And further includes a first sensor portion 54 and a second sensor portion 25 in an arrangement for controlling the angle of the sub drum 50 concerned.

The first sensor unit 54 includes a first hall sensor 55 and a first magnet unit 56 for sensing the number of revolutions of the sub drum 50. The first hall sensor 55 is provided on the upper surface of the cover of the tub 20 or on the inner rim surface of the cover of the tub 20 so that the first magnet part 56 is detected by the first hall sensor 55 And is installed on one side of the upper surface of the sub drum 50. Accordingly, when the sub drum 50 rotates, the first hall sensor 54 senses the first magnet portion 56 and then sends a signal to the controller 100. [ In the present embodiment, the first sensor unit 54 including a single hall sensor and a single magnet is shown for convenience of explanation, but the present invention is not limited to this. The first sensor unit 54 may include a plurality of hall sensors, It can be made of magnets.

The second sensor unit 25 includes a single second hall sensor 26 and a second magnet unit 27 for sensing the rotation angle of the drum 30. The second hall sensor 26 is connected to the tub 20, And a plurality of second magnets 27 are provided along the outer circumference of the upper surface of the rotor 15 so as to be sensed by the second hall sensor 26. [ Accordingly, when the drum 30 rotates, the second hall sensor 26 senses the rotation angle of the drum 30, and then sends a signal to the controller 100. The second sensor unit 25 is provided with the magnets of the second magnet unit 27 at equal intervals in the rotor 15 in order to sense the accurate rotation angle of the drum 30 and the larger the number of the magnets The rotation angle of the drum 30 can be precisely detected. That is, the rotation angle of the drum 15 is detected by the second sensor unit 25, and the rotation angle of the drum 30 is determined.

On the other hand, the rotation angle of the rotor 15 can be sensed without a separate sensor. That is, the rotation angle of the drum 30 can be determined by sensing the rotation angle of the rotor 15 in a sensorless manner without a sensor. In this sensorless method, the position of the rotor 15 can be estimated by estimating the rotor position of the motor based on the output current detected while a current of a certain frequency flows through the motor after allowing a phase current of a predetermined frequency to flow to the motor have. Such a sensorless system corresponds to a known technology, and a detailed description thereof will be omitted.

The control unit 100 controls the overall operation of the clothes processing apparatus (e.g., the laundry process, the rinsing process, the dewatering process, etc.) and operates the clothes processing apparatus according to the setting of the user.

In particular, the control unit 100 includes a driving unit 14 that receives signals generated by the first sensor unit 54 and the second sensor unit 25 and rotates the drum 30 on the basis of the signals generated by the first sensor unit 54 and the second sensor unit 25, (18) and a braking unit (110) for braking the rotating drum (30).

The braking unit 110 acts to stop the drum 30 by applying a braking force to the rotating drum 30.

Hereinafter, the sub drum 50 will be described in detail with reference to Figs. 2 to 4. Fig.

FIG. 2 is a perspective view showing the sub-drum 50 shown in FIG. 1, FIG. 3 is a cross-sectional view showing the sub-drum 50 mounted on the drum 30, FIG.

2 to 4, the sub-drum 50 is provided at the upper end of the drum 30 so as to be detachable in the drum 30, and is formed into a cylindrical shape having an open top and a substantially elliptical cross-section.

In addition, the sub-drum 50 is separated from the drum 30 to perform washing. Accordingly, it is possible to separate laundry according to color or material and separate laundry in the drum 30 and the sub drum 50, and then perform washing at the same time, so that the number of operations of the clothes processing apparatus 1 is reduced At the same time, washing water, detergent and energy waste can be prevented.

Further, since the sub drum 50 receives the rotational force from the drum 30 and rotates to perform washing, a separate driving device is not necessary.

The sub-drum 50 includes a sub-drum body 53 formed in a cylindrical shape with an open top, a sub-drum cover 51 detachably coupled to the upper end of the sub-drum body 53, A discharge unit 70 for discharging washing water in the sub drum 50 to the outside during rotation and a fixing unit 93 for coupling and disassembling the sub drum 50 mounted on the drum 30 to and from the drum 30 .

The sub drum body 53 is formed in an elliptical shape in cross section so as to form a vortex of washing water, and a friction rib 534 is provided on the inner circumferential surface to form water flow of washing water.

 In the case of the top loading type such as the clothes processing apparatus 1 according to the embodiment of the present invention, not only the washing is performed by the action of the detergent, but also the friction between the washing water and the laundry, . Since the sub drum body 53 is formed in an elliptical shape in cross section, the vortex is generated more effectively by rotation than a drum having a circular cross section. Since the swirling increases the friction between the washing water and the laundry, the sub drum 50 can increase the washing power by the elliptical cross section.

4, the sub drum body 53 has a first curvature portion C1 formed to have a first curvature and a second curvature portion C1 formed to have a second curvature smaller than the first curvature, (C2).

The first curvature portion C1 is formed at a position where the sub drum bodies 53 are opposed to each other, and is formed as a pair. The first curvature is formed so as to coincide with the curvature of the inner circumferential surface of the opening formed in the drum cover (31).

The second curvature portion C2 is provided at a position where the sub drum bodies 53 are opposed to each other, and is positioned between the pair of first curvature portions C1 to form a pair. The second curvature is formed to be smaller than the first curvature.

That is, the first curvature portion C1 and the second curvature portion C2 are alternately repeatedly provided along the circumference of the transverse section of the sub drum body 53.

The inner circumferential surface of the sub drum body 53 includes a near portion C2 spaced a first distance from the center of rotation of the sub drum 50 and a second distance larger than the first distance from the center of rotation of the sub drum 50. [ As shown in FIG. The far portion C1 corresponds to the first curvature portion C1 and the near portion C2 corresponds to the second curvature portion C2.

On the other hand, as the inner circumferential surfaces of the near portion C2 and the drum cover 31 are spaced apart from each other by a sufficient distance, a first water supply passage 573 to be described later is formed.

The portion of the inner circumferential surface of the sub drum body 53 indicated by the second curvature portion C2 is formed as a curved surface, but the present invention is not limited thereto. It may be more appropriate to designate it as the near portion C2 rather than the second curvature portion C2.

The first curvature portion C1, the second curvature portion C2, the remote portion C1, the near portion C2, the engaging portion C1, and the spacing portion C2 in the present specification indicate specific areas. If they are included in the specific area above, they are all labeled with the above terms. In this specification, a part of each of the sub drum body 53 and the sub drum cover 51 is referred to using the above terms.

The sub drum body 53 is not provided with the through holes 33 on the circumferential surface of the sub drum 50, unlike the case where the through holes 33 are provided on the circumferential surface of the drum 30. Accordingly, the sub drum body 53 can receive the washing water and the laundry, and the washing water is not discharged into the drum 30 through the circumferential surface or the lower surface. Therefore, the washing water stored in the tub 20 is only drawn into the drum 30 through the through holes 33 and is not drawn into the sub drum 50.

The friction ribs 534 protrude from the inner circumferential surface of the sub drum body 53 and extend upward and downward. The plurality of friction ribs 534 are spaced apart from each other at regular intervals and may be integrally formed with the sub-drum body 53. The friction rib 534 rotates the wash water in the rotating direction of the sub drum body 53 by the frictional force with the wash water when the sub drum body 53 rotates. The shape and function of the friction rib 534 are different from those of the guide rib 531 to be described later.

The sub-drum cover 51 is coupled to the upper end of the sub-drum body 53, and the cross-section thereof is the same as the cross-section of the sub-drum body 53.

Therefore, the circumferential surface of the sub drum cover 51 is also divided into the first curvature portion C1 and the second curvature portion C2, the first curvature portion C1 can be referred to as the remote portion C1, The second curvature portion C2 can be referred to as a near portion C2. Unlike the first curvature portion C1 and the second curvature portion C2 of the sub drum body 53, the sub-drum cover 51 has the first curvature portion C1 coupled to the inner peripheral surface of the drum cover 31 And the second curvature portion C2 is spaced from the inner circumferential surface of the drum cover 31. The second curvature portion C2 may be referred to as a spacing portion C2.

The sub drum cover 51 includes a laundry inlet 580 formed on the upper surface for loading laundry, a slope guide 581 formed along the inner circumferential surface of the laundry inlet 580, a handle 510 for providing space for the user to grip An inner water supply guide 560 for guiding the wash water discharged from the water supply unit 18 to the inside of the sub drum 50 and an inner water supply guide 560 for guiding the wash water discharged from the water supply unit 18 through the outside of the sub drum 50 The direction of the washing water circulating on the inner peripheral surface of the outer water guide 570 and the inner peripheral surface of the sub drum body 53 guiding to the inside of the drum 30 is changed by the collision, And guide ribs 531 formed to fall downward.

The handle 510 is formed on the upper surface of the sub drum cover 51 and has an operation part (not shown) in the form of a bar which is vertically movable. The pulling-out or pulling-in operation of the fixing part 93 is performed in conjunction with the vertical movement of the operating part.

The handle 510 is provided adjacent to the first curvature portion C1 of the sub drum cover 51, that is, the remote portion C1. When the washing water leaks due to the impact when the user separates the sub drum 50 from the drum 30, the sub drum 50 is rotated about the imaginary axis passing through the pair of the remote parts C1 So that rolling may occur in the left and right directions. When the handle 510 is provided adjacent to the second curvature portion C2, that is, the near portion C2, the user must apply a large force to calibrate the vibration of the sub drum 50, Is advantageously provided adjacent to the remote part C1.

The inner water supply guide 560 is provided on the upper surface of the sub drum cover 51 and is provided in the remote part C1, i.e., the engaging part C1. The inner water supply guide 560 includes a concave portion 561 and a water supply hole 562,

The concave portion 561 is formed by recessing a part of the upper surface of the sub drum cover 51 so that the wash water discharged from the water supply portion 18 is not scattered around after colliding with the upper surface of the sub drum cover 51.

The water supply hole 562 is formed on the inner surface of the concave portion 561 toward the laundry inlet 580 so as to communicate the laundry inlet 580 and the recess 561. The water supply hole 562 is connected to the second water supply channel 562 for guiding the wash water to the sub drum 50. The water supply hole 562 is formed in the water supply hole 562, ).

The washing water discharged from the water supply unit 18 is not scattered around the sub drum cover 51 as it is temporarily stored in the concave portion 561 and then the water supply hole 562 or the second water supply channel 562, And is guided to the inside of the sub drum 50 through the laundry inlet 580. [

The concave portion 561 and the water supply hole 562 are formed on the lower side of the handle 510 to maximize the space efficiency of the sub drum cover 51.

The outer water supply guide 570 is provided on the sub drum cover 51 and is provided in the near portion C2, that is, the spacing C2. That is, the outer water supply guide 570 is separated from the inner water supply guide 560 and provided. The sub drum 50 rotates together with the drum 30 by a predetermined angle so that the inner water supply guide 560 and the outer water supply guide 570 are positioned below the single water supply unit 18. Therefore, even if the outer water supply guide 570 is separated from the inner water supply guide 560, the wash water discharged from the single water supply unit 18 can be supplied to the drum 30 and the sub drum 50, respectively.

The outer water supply guide 570 is formed such that a corner portion of the spacing portion C2 is recessed to the inner side of the sub drum cover 51 and the bottom surface is inclined downward to the outside of the sub drum cover 51. The washing water discharged from the water supply unit 18 is guided to the inside of the drum 30 through the first water supply channel 573 formed as a space formed between the spacing C2 and the outer peripheral surface of the drum 30 .

The guide ribs 531 are formed in a plate shape and are provided below the upper surface of the sub drum cover 51 and extend downward. The guide rib 531 is provided so that one side thereof is in contact with the inner peripheral surface of the sub drum body 53. In other words, the plate-shaped guide ribs 531 are engaged with the sub drum cover on the upper side and one side is in contact with the inner peripheral surface of the sub drum body 53. The washing water in the sub drum body 53 rotates along the inner circumferential surface of the sub drum body 53 by the rotational force of the sub drum 50 and the direction of the flow changes due to the collision with the guide rib 531, The direction of the flow after the collision is changed and the parabolic curve can be dropped toward the center of the sub drum 50. [

Specifically, the guide ribs 531 are formed on one side face of the sub drum body 53 and extend downward from the upper surface of the sub drum cover 51, and a sub-drum body 53 And a rib inclined portion 533 extending from the rib vertical portion 532 toward the inner circumferential surface of the sub drum 50 in a downward sloping manner.

The rib inclined portion 533 is formed at an acute angle with the inner circumferential surface of the sub drum 50 and spaced apart from the lower surface of the sub drum body 53.

Since the rib inclined portion 533 is formed on the lower side of the guide rib 531, the laundry that rotates together with the wash water in the sub drum body 53 is less interfered with. Accordingly, the flow of the laundry is more smoothly performed, thereby increasing the friction between laundry and increasing the washing power.

On the other hand, even if the rib inclined portion 533 is formed on the guide rib 531, a sufficient amount of wash water can be raised. For example, when the sub drum 50 rotates inward, the water surface of the washing water on the inner peripheral surface of the sub drum body 53 is higher than the water surface of the washing water in the central portion of the sub drum body 53. Therefore, even if the rib inclined portion 533 is formed on the guide rib 531, a sufficient amount of wash water can be collided against the guide rib 531 and can be raised.

On the other hand, when the sub drum 50 rotates at a relatively low speed, a sufficient amount of wash water can be raised by disposing the guide ribs 531 on the near portion C2 of the sub drum cover 51. [ The amount of washing water passing through a virtual cross section from the center of the sub drum body 53 to the near portion C2 and the amount of washing water passing through the imaginary cross section from the center of the sub drum body 53 to the remote portion C1 Are the same. Therefore, when the height of the washing water passes through the imaginary cross section from the center of the sub drum body 53 to the near portion C2, it passes through a virtual section from the center of the sub drum body 53 to the remote portion C1 The guide rib 531 can raise a sufficient amount of wash water even if the sub drum 50 rotates at a relatively low speed.

In addition, the guide ribs 531 may be formed on one surface of the guide rib 531, which is in contact with the wash water, and on the opposite surface of the guide rib 531, That is, when the guide rib 531 is viewed along the radial direction at the central portion of the sub drum body 53, the width of the lower end face may be greater than the width of the upper end face. As a result, the wash water can more easily rise along one side and the other side of the guide ribs 531.

3, when the width of the sub drum 50 is 399 mm and the height is 309.2 mm, the guide ribs 531 are formed to have a height H of 70 mm and a width W of 65 mm, And exhibits a high washing power with the inclined guide 581. Experiments were carried out under the same conditions except that the height H of the guide ribs 531 was set to 50 mm and 90 mm, respectively. However, the average value was slightly higher than the height of the guide ribs 531 H) is set to 70 mm. However, the numerical values are only examples by experiments, and the specific values of the shapes of the sub drum 50 and the guide ribs 531 are not limited thereto.

The guide ribs 531 are provided in the near portion C2 as described above, but are not limited thereto. The guide ribs 531 may be additionally provided in the remote portion C1 to form a total of two pairs.

The inclined guide 581 is provided on the upper side of the guide rib 531 and is inclined downward toward the inner side of the sub drum 50. Specifically, the inclined guide 581 is formed along the inner side, that is, the inner peripheral surface, of the laundry inlet 580 located above the guide ribs 531.

The washing water raised by the guide ribs 531 is supplied to the sub drum body 53 along the lower side of the upper surface of the sub drum cover 51 via the upper portion of the inner peripheral surface of the sub drum body 53, And then drops freely into the sub drum body 53 while drawing a parabola.

When the inclined guide 581 is provided, the washing water does not fall freely. That is, the washing water moves in the horizontal direction along the lower side of the upper surface of the sub drum cover 51, and forms a flow 45 in which the moving direction is suddenly changed downward by the lower surface of the inclined guide 581. That is, a part of the velocity of the horizontal direction component is converted to the velocity of the vertical direction component. The washing water having the suddenly changed moving direction collides with the laundry contained in the sub drum body 53 more strongly than the free falling. At this time, the inclination guide 581 may be formed such that the inclination angle? With respect to the direction in which the gravity acts is set to approximately 10 degrees, and the angle at which the direction of movement of the wash water is changed is larger. Thus, a very strong impact is transmitted to the laundry contained in the sub drum body, thereby increasing the washing power.

The angle of incidence [theta] is approximately 10 degrees, but the numerical values are merely examples and are not limited to these numerical values.

On the other hand, when the sub drum 50 is rotated at a high rotation speed, the washing water contained in the sub drum 50 collides against each other, and the laundry rushes toward the laundry inlet 580 side. At this time, the inclined guide 581 serves to guide the flow 46 of the washing water to flow into the sub drum 50 along the upper surface thereof.

A second concavo-convex portion 535 is formed on the outer circumferential surface of the sub drum 50 so that the first concavo-convex portion 315 is engaged with the inner circumferential surface of the balancer 311. The second concavo-convex portion 535 is formed in the engaging portion C1 on the outer peripheral surface of the sub-container body 53. [ It is preferable that the second concave-convex portion 535 is not formed on the outer peripheral surface of the sub-container cover 51. [ This is because the sub-container cover 51 can be separated from the sub-container body 53 by the weight of the washing water and laundry contained in the sub-container body 53.

Meanwhile, the control method of the garment processing apparatus 1 according to an embodiment of the present invention determines whether or not the sub drum 50 is mounted on the drum 30 before water supply is performed, ) Is supplied to at least one of the drum (30) and the sub drum (50). This process may be performed by the first sensor unit 54, the second sensor unit 25, the control unit 100, the water supply unit 18, the driving unit 14, and the braking unit 110.

The control unit 100 may be configured to determine whether the sensing signal generated by the first sensor unit 54 and the second sensor unit 25 or the current sensed by the first sensor unit 54, The motor 14, and the braking unit 110 through a predetermined determination process based on the output current detected during the current flowing through the water supply unit 18, the motor 14, and the braking unit 110. Both the sensing signal generated by the second sensor unit 25 and the output current detected while the current of a predetermined frequency flows through the motor are used for the control unit 100 to measure the rotation angle of the drum 30, The second sensor unit 25 will be described as an example of a configuration for sensing the rotation angle of the drum. For the sake of brevity, the detailed description will be omitted in order to avoid redundant description.

6, whether or not the sub drum 50 is mounted on the drum 30 depends on whether the drum 30 should be supplied with the washing water or on the drum 30 and the sub drum 50, Is to be supplied.

Specifically, the control unit 100 first controls the driving unit 14 to rotate the drum 30 (S610). When the drum 30 rotates, the second sensor unit 25 senses the rotation angle of the drum 30 and sends a signal to the controller 100.

If the signal is not received from the first sensor unit 54 while the rotation angle of the drum 30 is detected by the second sensor unit 25 to be 360 degrees, (Step S630-N).

If it is determined that the sub drum 50 is not mounted on the drum 30, the controller 100 performs water supply from the water supply unit 18 to the drum 30 (S670) Or the inner water supply guide 560 does not control the driving unit 18 and the braking unit 110 so as to be positioned below the water supply unit.

If a signal is received from the first sensor unit 54 while the second sensor unit 25 senses that the rotation angle of the drum 30 is 360 degrees, the controller 100 controls the sub drum 50 to rotate in the drum 30 (S630-Y).

When the sub drum 50 is judged to be mounted on the drum 30, the controller 100 controls the main water supply and the main water supply, which are located below the water supply unit 18 and supply water to the drum 30, After the water supply, the sub drum 50 is rotated at a predetermined angle so that the inner water supply guide 560 is positioned below the water supply unit 18, and then the sub water supply is performed to supply water to the sub drum 50 (S650).

In the meantime, although it has been described that the sub-series are performed after the main series, it is for convenience of explanation, and the main series may be performed after the sub series.

When the water supply is started, the washing water is discharged through the water supply unit 18 first. The discharged washing water is supplied to the sub drum 50 through the inner water supply guide 560 and supplied to the drum 30 or the tub 20 through the outer water supply guide 570. That is, water supply by angle control is performed by rotating the sub drum 50 so that the inner water supply guide 560 and the outer water supply guide 570 are positioned below the water supply unit 18, respectively.

For example, the control unit 100 can control the driving unit 14 so that the sub-drum 50 rotates at a very low rpm for supplying water. Here, the rpm can be set to 3 rpm, for example. When the first sensor unit 54 sends a detection signal to the control unit 100, the control unit 100 sets the sub drum 50 in advance from the time when the first sensor unit 54 sends the detection signal to the control unit 100 The outer water supply guide 570 can be positioned below the water supply portion 18 by rotating the water supply guide 570 by one rotation angle. The rotation angle is set in advance according to the arrangement relationship of the first sensor unit 54, the outer water supply guide 570, and the water supply unit 18. [

The rotation angle of the sub drum 50 is measured by the second sensor unit 25 while the sub drum 50 rotates at a very low rpm and is transmitted to the control unit 100. [ When the controller 100 determines that the measured rotation angle has reached the predetermined rotation angle, the controller 100 controls the braking unit 110 to stop the sub-drum 50.

Since the rpm of the sub drum 50 is very low, the distance that the sub drum 50 slides from the time when the braking unit 110 is operated is negligibly small. When the sub drum 50 is braked by the braking unit 110, the outer water supply guide 570 is positioned substantially under the water supply unit 18. Therefore, the washing water discharged from the water supply unit 18 can be supplied to the drum 50 through the outer water supply guide 570 without the position of the sub drum 50 being corrected.

The rotation and braking of the sub drum 50 for supplying water through the inner water supply guide 560 is the same as the principle of rotating and braking the sub drum 50 in order to feed water through the outer water supply guide 570, .

Meanwhile, in another example, the control unit 100 may raise the rpm of the sub-drum 50 to control the driving unit 14 to slide from the point where the sub-drum 50 starts braking. Here, the rpm can be set to, for example, 15 to 25 rpm, but is not limited thereto. The rotation angle at which the outer water supply guide 570 is positioned below the water supply unit 18 when the first sensor unit 54 sends a sensing signal to the controller 100 is also detected by the first sensor unit 54, The outer water supply guide 570, and the water supply section 18, as shown in Fig. However, the predetermined rotation angle of this example may be set to have the same value as the predetermined rotation angle of the example, but it may be set to a value smaller than the preset rotation angle of the above example in consideration of the sliding distance of the sub drum Can be set to have.

The rotation angle of the sub drum 50 is measured by the second sensor unit 25 during the rotation of the sub drum 50 and transmitted to the controller 100. [ When the controller 100 determines that the measured rotation angle has reached the predetermined rotation angle, the controller 100 controls the braking unit 110 to stop the sub-drum 50.

The sub drum 50 has various sliding angles to slide from a point where braking is started due to the weight of the laundry and the laundry water contained therein as well as its own weight. When the second sensor unit 25 measures the sliding angle of the sub drum 50 and transmits it to the controller 100, the controller 100 corrects the predetermined rotation angle. For example, if the sliding angle of the sub drum 50 is large enough to allow the outer water supply guide 570 to pass under the water supply unit 18, the control unit 100 corrects the predetermined rotation angle value to be small, The sub drum 50 is rotated at a very low rotational speed such as 3 rpm or higher, for example, at 15 to 25 rpm, for example, as described above, So that a very small load is applied to the driving unit 14. [

When the driving unit 14 rotates the drum 30 and the sub drum 50 to perform the washing process after the water is supplied to the drum 30 and the sub drum 50, 50 and the washing water contained in the washing water and the washing water may cause a high load on the driving unit 14 and cause the temperature of the driving unit 14 to rise excessively.

Hereinafter, a control method of the clothes processing apparatus 1 according to an embodiment of the present invention, which can solve the problem that the temperature of the driving unit 14 rises excessively, will be described in detail with reference to FIG. 7 is a flowchart showing a control method of the clothes processing apparatus 1 according to the embodiment of the present invention.

The clothes processing apparatus 1 according to an embodiment of the present invention is configured such that water supply, washing, rinsing, drainage, and dewatering of the tub 20 and the sub drum 50 are separated from each other. For this purpose, the drum 30 and pulsator 35 can be driven in various forms. The driving motion of the drum 30 and the pulsator 35 in the control method of the garment processing apparatus 1 according to the embodiment of the present invention is carried out in such a manner that the drum 30 and the pulsator 35 rotate, As well as to the magnitude of the load applied to the driver 14 in connection therewith.

The control method of the garment processing apparatus 1 according to the embodiment of the present invention may be applied to a variety of applications such as basket motion, pearl sphere pulsate motion, stop motion, angular control motion, balancing motion, And includes rotational motion. Hereinafter, various driving motions in which the drum 30 and pulsator 35 are driven, which can be applied to an embodiment of the present invention, will be described in detail.

The basket motion is a motion for forming the water flow of the washing water accommodated in the drum 30 and the sub drum 50. When the driving unit 14 rotates the drum 30 and the sub drum 50 together, So that the water streams of the washing water supplied to the drum 30 and the sub drum 50 are simultaneously formed. At this time, the pulsator 35 does not rotate.

That is, the basket motion is performed as the driving unit 14 transmits the rotational force to the drum 30 after the washing water is supplied to the laundry contained in the tub 20 and the sub drum 50, respectively. The driving unit rotates the drum 30 at a high rpm so that the laundry contained in the drum 30 and the drum 50 is washed or rinsed while the basket motion is being performed. For example, the drum 30 rotates at about 90 rpm, and may rotate in the range of about 75 to 90 rpm, depending on the weight of laundry and laundry contained therein. Accordingly, when the basket motion is performed, the temperature of the driving unit 14 rapidly increases.

On the other hand, when the pulsator 35 and the drum 30 transmit the driving force in the case where the rotating motion of the pulsator 35 and the pulsator 35 is selectively engaged with the drum 30 as described above, Accept and rotate with the same rpm. In the case where the rotary shaft 17 selectively engages only one of the pulsator 35 and the drum 30, the drum 30 is rotated by transmitting the driving force, and the pulsator 35 transmits the driving force But can only be rotated by friction with water flow.

The pulsate motion is a motion for forming the water flow of the washing water contained in the drum 30 only when the driving unit 14 is rotated by only forward pulsator 35 in the forward and reverse directions to supply the drum 30 Is a motion that is performed to form a stream of wash water. At this time, the drum 30 and the sub drum 50 do not rotate.

That is, in the pearl set motion, the washing water is individually supplied to the laundry contained in the tub 20 and the sub drum 50, or after the washing water is supplied only to the tub 20, As shown in FIG. The driving unit rotates the pulsator 35 at a high rpm so that the laundry contained in the drum 30 is washed or rinsed while the Pearl Settle motion is performed.

The rpm of the pulsator 35 is set to approximately 165 rpm, but is not limited thereto, and may be variously set according to the weight of the laundry and the washing water accommodated in the drum 30. For example, if the dry laundry contained in the drum 30 is about 5 kg, the rpm of the pulsator 35 may be set in the range of approximately 145 to 165 rpm. When the Pearl Set motion is performed, the temperature of the driving unit 14 is rapidly increased. However, the temperature of the driving unit 14 does not rise sharply more than when the basket motion is performed.

The balance motion is a motion for dispersing the laundry evenly inside the drum 30, in which the pulsator 35 repeats positive rotation and reverse rotation. At this time, the drum 30 and the sub drum 50 do not rotate. While the balance motion is performed, the driving unit rotates the pulsator 35 at a rpm lower than the rpm at which the pulsator 35 rotates in the pearl set motion. For example, the rpm of the pulsator 35 is set at approximately 140 rpm, and may be set to approximately 130 to 140 rpm, depending on the weight of the laundry and the washing water accommodated in the drum 30. Therefore, if the basket motion or the pearlite motion is performed before the balance motion is performed and the driving unit 14 is elevated, the temperature of the driving unit 14 can be lowered as the balance motion is performed thereafter.

The stop motion is a motion in which the driving section temporarily stops operation so that the drum 30, the sub drum 50, and the pulsator 35 are not rotated. Since the driving unit 14 is not operated, the effect of lowering the temperature of the raised driving unit 14 is much greater than that of the other motions.

The angle control motion is a step in which the drum 30 is repeatedly rotated and braked to position the outer water supply guide 570 and the inner water supply guide 560 formed on the sub drum 50 below the single water supply unit. The rotation speed of the drum 30 in the angle control motion is set to a range of approximately 15 rpm to 25 rpm or a low speed of approximately 3 rpm so that the basket motion or the pearlite motion is performed to lower the temperature of the driving unit 14 Effect can be achieved.

The slow rotation motion is a motion in which the drum 30 rotates at a very low speed. For example, the rpm of the drum may be set within a range of approximately 19 to 21 rpm, and may be set at 20 rpm in particular. Water flow is hardly formed in the washing water accommodated in the drum 30 and the sub drum 50 by the low-speed rotation motion. And is mainly used for lowering the temperature of the driven portion.

On the other hand, washing or rinsing of the laundry contained in the drum 30 is mainly performed by rotating the pulsator 35. Washing or rinsing can be performed by rotating the drum 30, but its effect is lower than when the pulsator 35 is rotated to perform washing or rinsing.

Washing or rinsing of the laundry contained in the sub drum 50 is performed by rotating the drum 30. In other words, the sub-drum 50 performs washing or rinsing while rotating together with the drum 30 by using the rotational force of the drum 30. The pulsator 35 is not connected to the sub-drum 50.

When the drum 30 is rotated forward and reverse to perform washing or rinsing by rotating the sub drum 50, not only the frictional force between the drum 30 and the washing water accommodated in the tub 20, Friction between the inner surface of the sub drum 50 and the laundry contained in the sub drum 50 is additionally generated and a force as much as the weight of the washing water stored in the sub drum is additionally applied to the motor, A positive load is applied.

If a high load is applied to the driving part 14, the temperature of the driving part 14 may rise sharply, and the suddenly rising temperature may cause the driving part 14 to fail.

The phenomenon in which the temperature of the driving unit 14 rises is a phenomenon in which either the drum 30 or pulsator 35 is rotated for a long time or the pulsator 35 is rotated plural times This is especially common. Accordingly, the control method of the garment processing apparatus 1 according to the embodiment of the present invention provides the following control method.

The control method of the garment processing apparatus 1 according to an embodiment of the present invention may include the water flow forming steps S722 and S725 and the cooling steps S723, S724, S730, and S740.

The water flow forming steps S722 and S725 form the water flow of the washing water supplied to the drum 30 and the sub drum 50, respectively, so that the drum 30 and the pulsator 35 are repeatedly rotated As shown in Fig. Accordingly, in the water flow forming steps S722 and S725, the basket motion and the pearl set motion can be repeated and the temperature of the driving unit 14 can be raised.

In addition, the water flow forming steps S722 and S725 may include a first water flow forming step S722 and a second water flow forming step S725.

In the first water flow forming step S722, as the basket motion is performed, the driving unit 14 rotates the drum 30 and the sub-drum 50 together so that the laundry 30 supplied to the drum 30 and the sub- Is repeatedly performed so that a water stream of water is formed at the same time. That is, in the first water flow forming step S722, after the washing water is respectively supplied to the laundry accommodated in the tub 20 and the sub drum 50, the driving unit 14 rotates the drum 30 and the sub drum 50 . However, as described above, the driving unit 14 can transmit the rotational force to the pulsator 35 as well as the drum 30.

Here, in the first water flow forming step S722, the drum 30 and the sub drum 50 coupled to the inner peripheral surface of the drum 30 are repeatedly rotated forward and reverse together. At this time, the frictional force between the surface of the drum 30 and the laundry contained in the tub 20, the wash water, the weight of the drum 30 and the weight of the sub drum 50, And the washing water accommodated in the drum 30 acts as a resistance against the normal rotation and the reverse rotation of the drum 30.

Accordingly, the first water flow forming step S722 includes the second water flow forming step S725, which will be described later, so that the amount of the load applied to the driving part 14 is the largest compared to other washing and rinsing steps, Is the most dramatic rise. Accordingly, the first water flow forming step S722 is not performed over a predetermined time to prevent the temperature of the driving unit 14 from rapidly rising to cause a failure. The predetermined time may be set to, for example, about 1 minute, but is not limited thereto, and is set differently depending on the capacity of the drum 30 and the sub drum 50, the performance of the driving unit 14, and the like. After the first water flow forming step S722, a second water flow forming step S725 and a cooling step S723, S724, S730, and S740 described below may be performed.

The second water flow forming step S725 is repeatedly performed with the first water flow forming step S722 and the pulsating motion is performed by the driving unit 14 so that the pulsator 35 rotates forward and reverse So that a water flow is formed in the washing water inside the drum 30. That is, the second water flow forming step S725 is a step in which the driving unit 14 transmits the rotational force to the pulsator 35 after the washing water is supplied to the tub 20 and the sub drum 50. The present invention does not exclude that the driving unit 14 transmits rotational force to the pulsator 35 after washing water is supplied only to the tub 20 in a state in which the washing water is mounted on the sub drum 50. [ In this second water flow forming step (S725), the Pearl Settle motion may be performed more than once.

In the second water flow forming step S725, the frictional force between the surface of the pulsator 35 and the laundry and washing water inside the drum 30 acts as a resistance against forward rotation and reverse rotation of the pulsator 35. Accordingly, the second water flow forming step S725 is performed such that a load smaller than the load applied to the driving unit 14 by the first water flow forming step S722 is applied to the driving unit 14, and in the first water flow forming step S722, The temperature of the driving unit 14 rises in accordance with the temperature increase rate that is smaller than the temperature rise rate of the driving unit 14.

The second water flow forming step S725 may be performed after the first water flow forming step S722 when the temperature of the driving unit 14 is excessively increased in the first water flow forming step S722, The temperature can be reduced. Accordingly, when the first water flow forming step S722 is continuously performed, the driving unit 14 is subjected to a large load to raise the temperature of the driving unit 14, but the first water flow forming step S722 and the second water flow forming step S725 Is repeatedly performed, the temperature of the driving unit 14 is prevented from being excessively increased.

The cooling steps S723, S724, S730 and S740 are performed in such a manner that at least one of the drum 30 and the pulsator 35 is maintained for a certain period of time such that the temperature of the driving section 14, which rises during the execution of the water flow forming steps S722 and S725, It does not rotate. The cooling step is a step of securing time for releasing heat while the driving unit 14 is not operated for a predetermined time.

This cooling step may be performed in a period from the start of the water flow forming step (S722, S725) to the end thereof. After the start of the water flow forming steps S722 and S725, the temperature of the driving unit 14 sharply increases at least once until the end of the water flow forming steps S722 and S725, so that the driving unit 14 is cooled at an appropriate time. In addition, after the water flow forming steps S722 and S725 are completed, the drainage and dehydration steps in which the drum 30 and the sub drum 50 are rotated while discharging the washing water are performed. Is lower than the load applied to the driving unit 14 in the water flow forming steps S722 and S725. Therefore, after the water flow forming steps S722 and S725 are completed, the driving unit can be cooled only by performing the drainage and dehydration steps.

This cooling step includes additional watering steps S723 and S724, a populating step S730 and a pause, S740.

The additional water supply steps S723 and S724 include the steps of measuring the water level of the tub 20 while the rotation of the drum 30 and the pulsator 35 is stopped and measuring the water level of the tub 20 when the water level of the measured tub 20 is lower than the reference value And the washing water is supplied to the tub 20. [

The step of measuring the water level of the tub 20 is performed such that the water level sensor accurately measures the water level of the tub 20 by performing the stop motion so that the water is not formed in the washing water accommodated in the tub 20 And the pulsator 35 do not rotate. Therefore, heat can be released from the driving unit 14 while the driving unit 14 is not operating.

The washing water is supplied to the tub 20 from the water supply unit 18 when the water level measured in the measuring step of the tub 20 is lower than the reference value. The drum 30 performs the rotation and stopping operations as the angle control motion is performed so as to set the water supply position for supplying the washing water to the tub 20 further. This drum 30 rotates, for example, in the range of about 3 rpm or about 15 to 25 rpm, as described above. Since the rotational speed of the drum 30 is very low, the amount of heat generated by the driving unit 14 is very small.

Therefore, if the temperature of the driving unit 14 rises excessively, the temperature of the driving unit 14 can be lowered by the operation of rotating the drum 30 at a very low rotational speed.

The pulping step S730 is performed so that the pulsator 35 is very low in order to evenly disperse the laundry entangled by the rotation of the pulsator 35 in washing or rinsing, Speed rotation and reverse rotation.

The rotational speed of the pulsator in the unwinding step S730 is much lower than the rotational speed of the pulsator 35 in the second water flow forming step S725. The amount of heat generated in the driving unit 14 is smaller in the forging step S730 than in the second water flow forming step S725. Therefore, when the temperature of the driving unit 14 is excessively increased in the second water flow forming step S725, the temperature of the driving unit 14 can be lowered by performing the forging step S730.

In the dormant step S740, as the stop motion is performed, the operation of the driving unit 14 is stopped so that the drum 30 and the pulsator 35 are not rotated, or the drum 30 is extremely low And rotating at a rotational speed. The temperature lowering effect of the driving unit 14 is the largest. In the resting step S740, the drum 30 is rotated forward and backward at a very low rotational speed so that the user can confirm whether or not the washing process is performed in order to prevent the user from misunderstanding that the washing machine is not functioning properly .

The control method of the garment processing plant according to the embodiment of the present invention can be performed according to a predetermined pattern as shown in FIG.

First, when the sub drum 50 is mounted on the inner circumferential surface of the drum 30, the water supply step S710 for supplying the washing water to the tub 20 and the sub drum 50 is performed.

The water supply step S710 adjusts the amount of washing water supplied to the tub 20 by the water level sensor for measuring the water level of the tub 20, .

Thereafter, a first water flow forming step S722 for rotating the drum 30 to perform washing or rinsing of laundry contained in the sub-drum 50 is performed.

The first water flow forming step S722 may be performed by the sub drum 50. The first water flow forming step S722 may be performed in the same manner as the first water flow forming step S722, And washing or rinsing laundry contained in the drum 30 is also performed.

In the first water flow forming step S722, as the driving unit 14 causes the drum 30 to rotate forward and reverse, a very large load is applied to the driving unit 14, so that the temperature of the driving unit 14 is suddenly It goes up. Therefore, the first water flow forming step (S722) is not performed beyond a predetermined time. This predetermined time may be set to approximately one minute as described above.

On the other hand, the laundry contained in the drum 30 can continuously absorb the washing water in the first water flow forming step S722 as well as the water feeding step S710 depending on the type thereof. Therefore, since the washing water measured by the water level sensor in the water supplying step (S710) may not have sufficient washing power, the water level is measured again and the washing water is further supplied.

That is, it is determined whether or not the water level of the tub 20 is lower than the reference value after the first water flow forming step S722 is performed (S723). If the measured water level is less than the reference value (S723-Y) (S723, S724) including the step S724 of supplying the wash water in addition to the water supply step (S724).

In the additional water supply steps S723 and S724, the driving unit 14 is not operated to measure the water level, and the rotational speed of the drum 30 for setting the water supply position is very low. Therefore, the temperature of the driving unit 14 can be lowered have.

On the other hand, the second water flow forming step (S725) is performed after the measured water level is above the reference value (S723-N) or after the wash water is further supplied in the additional water supplying steps (S723, S724).

The pulsator 35 rotates in order to perform washing or rinsing of the laundry inside the drum 30 in the second water flow forming step S725. The temperature of the driving unit 14 which has been lowered by the execution of the additional water supply steps S723 and S724 rises again by the second water flow forming step S725.

A series of procedures in which the first water flow forming step (S722), the additional water supplying step (S723, S724), and the second water flow forming step (S725) shown in FIG. 7 are sequentially performed can be repeatedly performed several times. That is, if 0 is stored first in the n value and the second water flow forming step S725 is performed, 1 is added to the n value (S726). If the n value does not reach the reference value (S727-N) The formation step S722 is performed and if the n value is the reference value, the step S727-Y is performed. Here, the reference value is preset and stored in accordance with factors such as the type of laundry, the amount of laundry, the amount of wash water, the temperature of wash water, etc. The forging step S730 is performed. The unwinding step S730 is generally performed after a series of procedures in which the first water flow forming step S722, the additional water supplying steps S723 and S724, and the second water stream forming step S725 are sequentially performed are repeated several times . That is, after the laundry is somewhat entangled.

Since the pulsator 35 repeats the normal rotation and the reverse rotation at a very low rotational speed, the temperature of the driving unit 14 which has risen due to the above series of procedures can be lowered.

The dormancy step S740 is performed after the execution of the compounding step S730. In addition, the dormancy step S740 is the greatest temperature lowering effect of the driving unit 14 and can be performed before the first water flow forming step S722. The temperature rise of the driving unit 14 in the first water flow forming step S722 (step S722) may be reduced by performing the resting step S740 in advance to sufficiently lower the temperature of the driving unit 14 and then performing the first water flow forming step S722. The temperature of the driving unit 14 may not reach the temperature at which the driving unit 14 fails.

On the other hand, since the intensity of the water flow in the sub drum 50 formed in the first water flow forming step S722 is lower than the intensity of the water flow in the drum 30 formed in the second water flow forming step S725, (S722) can be performed more than the second water flow forming step (S725).

In this case, the first water flow forming step (S722) may be performed before the drainage and dewatering step (S760). In other words, the water-forming steps S722 and S725 for performing washing or rinsing can be terminated with the end of the first water-stream forming step S722.

Even if the driving unit 14 rotates the drum 30 and the pulsator 35 at a high speed in the dehydrating step, the washing water is discharged from the tub 20 and the sub drum 50 in the drainage step, The applied load is smaller than the load applied to the driving unit 14 in the first water flow forming step S722 as well as the second water flow forming step S725.

Therefore, the first water flow forming step S722 is performed before the drainage and dewatering step S760 is performed when the temperature of the driving unit 14 raised in the first water flow forming step S722 during the drainage and dewatering step S760 is It can fall.

Therefore, after the first water flow forming step (S722), that is, after the water flow forming steps (S722, S725) are performed, a separate cooling step is not performed and the drainage and dehydration step (S760) can be performed.

When the first water flow forming step S722 and the second water flow forming step S725 are performed for washing, dehydration in the water drainage and dehydration step S760 is simple dehydration, and the first water flow forming step S722 and the second water flow forming step If the water-forming step S725 is performed for rinsing, dehydration in the drainage and dehydration step (S760) is essentially dehydration.

Another embodiment of the pattern in which the water-forming steps (S722, S725) and the cooling step are performed during the course of performing washing or rinsing is shown in Figures 8 and 9. 8 and 9 are graphs schematically showing changes in temperature of the driving unit 14 when the control method of the garment processing apparatus 1 according to another embodiment of the present invention is applied.

Referring to FIG. 8, the washing process is shown. Here, the first water flow forming step S722 is represented by S1, the second water stream forming step S725 is represented by S4, the additional water supplying steps S723 and S724 are represented by S2, and the unwinding step S730 is represented by S7, the dormancy step (S740) is represented by S5, and the drainage and dewatering step (S760) is represented by S9.

A second water flow forming step S4 is first performed and a series of procedures S10 in which the first water flow forming step S1, the additional water supplying step S2 and the first water flow forming step S1 are sequentially performed, Is repeated in turn. The temperature of the driving unit 14 rises in the first water flow forming step S1 and the temperature of the driving unit 14 falls or the temperature increasing rate becomes slow in the additional water supplying step S2.

Meanwhile, a second water flow forming step S4 and a resting step S5 are performed between the series of procedures S10 described above.

The above-described series of steps S10 is repeated three times as shown in FIG. 8, and then a second water flow forming step S4 is performed. Since the temperature of the driving unit 14 is excessively raised as the series of procedures S10 is repeated three times, the temperature of the driving unit 14 is lowered even though the second water flow forming step S4 is performed.

Thereafter, the unwrapping step S7 and the dormant step S5 are sequentially performed.

The first water flow forming step S1 and the second water flow forming step S4 are sequentially performed to raise the temperature of the driving unit 14 when the unwinding step S7 and the resting step S5 are performed.

Thereafter, the unwrapping step S7 and the resting step S5 are performed sequentially. As the dormant step S5 is performed after the unwinding step S7, the temperature of the driving part 14 is sufficiently lowered.

After the first water-stream forming step (S1) is finally performed, a drainage step and a dehydration step are performed. As the drainage step and the dehydration step are performed, the temperature of the driving part 14 raised in the first water flow forming step S1 may be lowered.

Referring to FIG. 9, a rinsing process is shown. The first water flow forming step S1 is first performed and then the second water flow forming step S4 and the additional water supplying step S2 and the first water flow forming step S1 are performed again.

Thereafter, the unwrapping step S7 for loosening the laundry is performed, and then the additional water supply step S2 is performed to sufficiently lower the temperature of the driving unit 14, and then the first water flow forming step S1 is performed.

In the case of performing the rinsing process, the dormant step S5 is not performed unlike the case of performing the washing process. Since the rinsing process is shorter than the washing process, the temperature rising width of the driving unit 14 is relatively small and the detergent does not need to be dissolved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

1: garment processing apparatus 10: cabinet
20: tub 30: drum
50: Sub drum 560: Inner water supply guide
570: outer water supply guide 51: sub drum cover
53: Sub-drum body 531: Guide rib
70:

Claims (20)

A drum rotatably installed in the tub, a pulsator rotatably installed in the drum, a sub drum detachably coupled to the inner circumferential surface of the drum and receiving laundry water, And a driving unit for rotating the drum and the pulsator, wherein a basket motion in which water flows in the drum and the sub-drum are formed simultaneously when the drum and the sub-drum are driven together, And a washing machine for washing the washing machine, the washing machine comprising: a washing machine for washing laundry,
A water flow forming step in which basket motion and pulsator motion are performed; And
And a cooling step performed after the start of the water flow forming step and in which the temperature of the driving part raised in the water flow forming step is lowered,
Wherein in the cooling step, the driving unit is operated or stopped at a load lower than the load in the basket motion and pulsator motion. The method according to claim 1,
Wherein a time point at which the cooling step is performed is pre-set in the washing or rinsing cycle. The method according to claim 1,
Wherein the basket motion is a drive in which the driving unit rotates the drum and the sub drum together in the forward and reverse directions,
Wherein the pulsator motion is a drive in which the driving unit rotates only the pulsator forward and reverse. The method according to claim 1,
Wherein the cooling step is performed after the first basket motion is performed. 5. The method according to any one of claims 1 to 4,
Wherein a total time in which the pulsator motion is performed is greater than a total time in which the basket motion is performed in the water flow forming step 5. The method according to any one of claims 1 to 4,
Wherein the execution time of the water flow forming step is greater than the execution time of the cooling step. 5. The method according to any one of claims 1 to 4,
Wherein in the water flow forming step, the number of times of performing the basket motion is greater than the number of times of the pulse motor motion. 5. The method according to any one of claims 1 to 4,
Wherein in the water flow forming step, the maximum duration of the basket motion is set to be equal to or smaller than a maximum duration of the pulsator motion. 5. The method according to any one of claims 1 to 4,
Wherein the cooling step includes an additional water supplying step of additionally supplying water to the tub to determine whether the water is to be additionally supplied to the tub. 10. The method of claim 9,
Wherein in the additional water supplying step, a stop motion is performed in which the drum and the pulsator are not rotated. 10. The method of claim 9,
Wherein the additional watering step comprises:
Between the basket motion and the pulsator motion,
Between the basket motion and the basket motion, or
And wherein the step of performing the motion control is performed between the pulsator motion and the pulsator motion. 10. The method of claim 9,
Wherein in the additional water supplying step, an angle control motion is performed to control rotation of the drum to move the sub drum to a predetermined position. 5. The method according to any one of claims 1 to 4,
The cooling step includes:
And a balancing step of balancing motion in which the pulsator repeatedly rotates forward and reverse to uniformly disperse the laundry contained in the drum in the drum. 14. The method of claim 13,
When the washing water is divided into an initial stage of washing and a late stage of washing based on a time point at which the water supply of washing water is finally completed into the tub in the washing cycle,
Wherein the unwrapping step is performed in the washing machine. 14. The method of claim 13,
The cooling step includes:
A stopping step in which at least one of a low-speed rotation motion in which the drum and the pulsator do not rotate, and a low-speed rotation motion in which the drum repeats forward rotation and reverse rotation at rpm smaller than rpm in the basket motion is performed Of the clothes processing apparatus. 16. The method of claim 15,
Wherein the unwrapping step is performed between the pulsator motion and the dormant step. 16. The method of claim 15,
Wherein the dormant step is performed between the basket motion and the pulsator motion. 5. The method according to any one of claims 1 to 4,
When the washing cycle is divided into an initial stage of washing and a late stage of washing based on a time point at which the water supply of washing water is finally completed into the tub,
Wherein the number of times of the basket motion and the total execution time of the basket motion performed at the beginning of the laundry are greater than the total number of times of the basket motion and the basket motion performed at the late stage of the laundry. 5. The method according to any one of claims 1 to 4,
It is excluded that the basket motion is continuously performed after the pulsator motion is performed,
Wherein the controller is configured to perform the cooling step after performing the pulsator motion when the pulsator motion is continuously performed after the basket motion is performed. 4. The method according to any one of claims 1 to 3,
The water flow forming step is finally completed by performing the basket motion,
Wherein the drain pump is driven in a stop motion in which the drum and the pulsator are not driven, thereby discharging drainage.

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