KR20170122615A - Laundry Treating Apparatus - Google Patents

Abstract

The present invention relates to a laundry treating apparatus, and more specifically relates to a laundry treating apparatus which is configured to perform laundry in an inner portion of a sub drum separately from a main drum by detachably installing the sub drum in an inner portion of the main drum. To this end, the present invention comprises: a tub for receiving washing water; a first drum rotatably provided in an inner portion of the tub; a second drum detachably provided in an inner portion of the first drum, in which laundry is being washed by the second drum while the second drum is separated from the first drum; a first projection portion provided on an inner circumferential surface of the first drum; and a second projection portion provided on an outer circumferential surface of the second drum, and configured to be seated while being engaged with the first projection portion.

Description

{Laundry Treating Apparatus}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a garment processing apparatus, and more particularly, to a garment processing apparatus in which a sub-drum is detachably installed in a main drum so that washing in a sub-drum is separated from the main drum.

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 rotary shaft of the drum is formed substantially perpendicular to the paper surface, and the friction between the rotating drum and the laundry and the fall impact of the laundry are received by the driving force of the motor in the state where the detergent, 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 rotating shaft of the drum is formed substantially perpendicular to the paper surface, the drum is provided inside the tub where the washing water is stored, and the washing machine is washed in a state where laundry is immersed in the washing water supplied into the drum. Thereby performing washing. In the pulsator system, washing is performed by the rotation of the drum or the lower part of the drum, and by the rotation of the pulsator forming the water stream, the friction between the washing water and the laundry and the action of the detergent. 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 garment disposal apparatus including a sub-drum detachably installed in the drum has appeared to improve this point.

However, since the sub drum has a small capacity and it is difficult to install a separate device for generating a vortex and the frequency of occurrence of the vortex due to rotation of the sub drum is relatively low as compared with that of the main drum, There was a problem.

In addition, there is a problem in that it is not easy for the user to mount the sub-drum at the precise position because the portion engaged between the sub-drum and the main drum is located in a relatively narrow portion.

In addition, since the sub drum is not only vibrated in the horizontal direction at the time of high-speed rotation to perform the dewatering process, but also vibrated in the vertical direction, there is a problem that the sub drum can be detached from the main drum.

In addition, when water is supplied to the main drum and the sub drum, a water supply device for supplying water to the main drum and a water supply device for supplying water to the sub drum are separately required, which increases the volume of the clothes processing device and requires a large manufacturing cost.

In addition, there has been a problem that the washing water is discharged to the inside of the main drum during the dewatering process including the simple dewatering in the washing process by the sub-drum, i.e., the washing process, the rinsing process and the dewatering process. For example, in order to prevent the contamination of the laundry from being contaminated further by contaminated laundry, the laundry having a low degree of contamination is washed by the main drum, The washing water of the sub drum is discharged to the inside of the main drum during the dehydration process to further contaminate the laundry of the main drum.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a garment disposal apparatus which can be easily installed in a main drum and includes a sub drum in which laundry is separated from a main drum .

In order to achieve the above object, the present invention provides a washing machine comprising: a tub for receiving wash water; A first drum rotatably installed in the tub; And a second drum detachably installed in the first drum, the second drum being detached from the first drum, and the second drum being detachably installed in the first drum, And at least one guide rib for guiding the wash water circulating along the inner circumferential surface of the guide rib upward.

The at least one guide rib may be provided on the inner circumferential surface of the second drum.

The at least one guide rib may be spaced apart from the lower surface of the second drum.

The at least one guide rib includes a rib vertical portion extending downward from an upper surface of the second drum; And a rib inclined portion extending downward from the vertical portion toward the inner circumferential surface of the second drum.

The second drum may further include an inclination guide provided on the upper side of the guide rib to adjust a falling angle of the wash water guided by the guide rib.

The inclined guide may be inclined downward toward the inside of the second drum.

A laundry inlet for charging laundry is formed on the upper surface of the second drum, and the inclined guide may be provided inside the laundry inlet.

The second drum may be formed in an elliptical shape in cross section so as to form a vortex of washing water.

An inner circumferential surface of the second drum is spaced apart from the rotation center by a first distance; And a remote portion spaced a second distance greater than the first distance, and the at least one guide rib may be provided in the near portion.

The second drum may include a friction rib formed on the inner circumferential surface of the drum so as to increase friction with the laundry in the up and down direction.

The second drum includes a second drum body for receiving laundry and wash water; And a second drum cover detachably attached to the body and having a laundry inlet for inputting laundry.

The at least one guide rib may be provided on the lower side of the second drum cover, one side of which is in close contact with the inner circumferential surface of the second drum body, and the lower side of the guide rib may be separated from the lower surface of the second drum body.

The at least one guide rib includes a rib vertical portion extending downward from the second drum cover; And a rib inclined portion extending downward from the vertical portion toward the inner circumferential surface of the second drum body.

The second drum cover may include an inclined guide provided on an upper side of the guide rib to adjust a falling angle of the washing water guided upward by the guide ribs.

The inclined guide may be formed on the inner circumferential surface of the laundry inlet and be inclined downward toward the inside of the second drum.

Further, a tub for receiving wash water; A first drum rotatably installed in the tub; A second drum detachably installed in the first drum, the second drum being washed and separated from the first drum; A guide rib provided on an inner circumferential surface of the second drum and guiding the wash water circulating along the inner circumferential surface of the second drum upward by a centrifugal force when the second drum rotates; And an inclination guide provided at an upper side of the guide rib to adjust a falling angle of the washing water guided by the guide ribs.

The inner circumferential surface of the second drum may have a first curvature portion formed to have a first curvature and a second curvature that is smaller than the first curvature to form a vortex of the washing water.

The guide rib may extend from the first curvature portion toward the center of the second drum.

The thickness of the cross-sectional surface of the guide rib may increase as the guide rib is away from the upper surface of the second drum.

The guide rib may include a rib inclined portion formed to be inclined downward toward the inner circumferential surface of the second drum to prevent the laundry from interfering with the flowing laundry.

Further, a tub for receiving wash water; A first drum rotatably installed in the tub; A second drum detachably installed in the first drum, the second drum being washed and separated from the first drum; A first irregular portion provided on an inner circumferential surface of the first drum; And a second concave-convex portion provided on an outer circumferential surface of the second drum and configured to be seated while being engaged with the first concave-convex portion. The above object can be achieved by providing a clothes processing apparatus.

The second concavo-convex portion may be formed in a shape corresponding to the first concavo-convex portion.

The second concavo-convex portion includes at least one protruding portion; And at least one groove portion formed in a concave shape corresponding to the at least one protrusion portion.

The at least one protrusion and the groove may be curved.

The second concave-convex part further includes an inclined part connecting the protruding part and the groove part, and the inclined part may be inclined by 10 degrees with respect to the gravity direction.

The second drum may be formed in an elliptical shape in cross section so as to form a vortex of washing water.

An outer circumferential surface of the second drum is spaced apart from an inner circumferential surface of the first drum; And an engaging portion having the second concavo-convex portion and engaged with the inner circumferential surface of the first drum.

The first drum includes a first inclination preventing portion extending from both sides of the first concave and convex portion, and the second drum is seated on the first inclination preventing portion to prevent vertical vibration of the separating portion due to centrifugal force due to rotation And a second anti-tilt portion.

The protrusions may be spaced at intervals of 7 degrees.

The first drum may have a balancer at an upper end thereof, and the first concavo-convex part may be provided at an inner circumferential surface of the balancer.

The second drum includes a handle for providing a space for a user to hold, and the first and second concave and convex portions may be provided on the same hardness as the handle.

Further, a tub for receiving wash water; A first drum rotatably installed in the tub; And a second drum detachably installed in the first drum, the second drum being detached from the first drum, and the second drum being selectively detachable in accordance with the magnitude of the centrifugal force due to rotation, And a discharging portion for discharging the clothes from the clothes discharging portion.

The discharge portion may be provided at the upper end of the second drum so that the washing water flowing along the inner circumferential surface of the second drum flows into the drum and is discharged to the outside.

The discharge unit includes a check valve for selectively passing washing water through the discharge port. And a decompression unit for decompressing the wash water having passed through the check valve.

Wherein the check valve comprises: a contraction part contracted by the centrifugal force; And a cutting groove formed to penetrate the shrinkage portion and opened by shrinkage of the shrinkage portion.

The cutting groove may be formed to extend in a direction in which the centrifugal force acts.

The check valve may further include a rotation unit connected to the contraction unit and rotating in a direction in which the centrifugal force acts.

The decompression unit includes a collecting unit for collecting wash water passing through the check valve; A first through hole through which wash water collected in the collecting unit passes; And a second through hole provided on the upper side of the first through hole and through which wash water has passed through the first through hole.

The collecting unit may include a first collecting unit for collecting wash water passing through the check valve; A second collecting part provided above the first collecting part and communicating with the first collecting part through the first through hole; And a third collecting unit provided on the second collecting unit and communicating with the second collecting unit through the second through hole.

The first through holes and the second through holes may be formed on different hardnesses.

The second drum may be formed in an elliptical shape in cross section so as to form a vortex of washing water.

An inner circumferential surface of the second drum is spaced apart from the rotation center by a first distance; And a remote unit spaced a second distance greater than the first distance.

And a locking unit for engaging and disengaging the first drum and the second drum.

The discharge unit may be provided in the remote unit.

Wherein the locking portion includes: a locking portion protruding from an inner circumferential surface of the first drum; And a fixing unit provided to be able to be drawn into and drawn out from the second drum and interfering with the engaging part when the first drum is drawn out to prevent the upward movement of the second drum.

The locking unit may further include a sliding portion slidably coupled to the second drum in a vertical direction while one side of the second drum is exposed to the upper side of the second drum. It can be withdrawn.

Wherein the locking portion comprises: a rack formed on an upper surface of the fixing portion; And a pinion which engages with the rack, and which receives and draws the fixed portion by normal and reverse rotation in conjunction with a vertical sliding movement of the sliding portion.

The pinion may include a pinion connection portion protruding from the sliding portion to be rotatable.

The second drum may further include a handle for providing a space for a user to grip, and the sliding portion may be coupled to the handle to be drawn in and drawn out.

Further, a tub for receiving wash water; A first drum rotatably installed in the tub; A second drum detachably installed in the first drum, the second drum being washed and separated from the first drum; A discharge unit provided in the second drum and discharging wash water when the magnitude of the centrifugal force due to rotation of the second drum is a predetermined value or more; And a locking unit for engaging and disengaging the first drum and the second drum. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings.

The second drum having a first curvature portion having a predetermined curvature to form a swirling flow of the washing water; And a second curvature portion having a curvature smaller than the curvature of the first curvature portion.

The discharge portion may be provided at the upper end of the second curvature portion so that the washing water flowing along the inner circumferential surface of the second drum flows in and is discharged to the outside.

Wherein the discharge portion includes a check valve including a cutting groove extending in a direction in which the centrifugal force acts; And a decompression unit for decompressing the wash water having passed through the check valve.

And a grip portion provided at an upper end of the second drum and having an operation portion for pulling in and pulling out at one side thereof. The locking portion is engaged and disengaged between the first and second drums in conjunction with the pull-in and pull- .

As described above, the drum washing machine of the present invention has the following effects.

First, according to the present invention, a vortex is sufficiently generated in the sub-drum by the rotation of the sub-drum without providing a separate vortex generator, thereby providing an effect of increasing washing power.

Secondly, according to the present invention, by adopting a configuration in which a plurality of protrusions and protrusions made of grooves for accommodating protrusions are widely distributed, the user can more easily mount the sub-drums to the correct positions of the main drums.

Third, according to the present invention, not only does the sub-drum not separate from the main drum during high-speed rotation of the sub-drum, but also provides an effect of engaging and disengaging the sub-drum with the main drum only by gripping the handle.

Fourthly, according to the present invention, it is possible to supply water to the main drum and the sub drum by a single water supply device, thereby reducing the volume of the clothes processing apparatus and reducing the manufacturing cost.

Fifthly, according to the present invention, the washing water is discharged to the outside of the main drum during dewatering by high speed rotation of the sub drum to prevent further contamination of the laundry in the main drum, thereby separating washing of the main drum and washing of the sub drum Can be maximized.

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 second 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 second drum mounted on the first drum;
5 is a partially cutaway perspective view showing the inner circumferential surface of the first drum cover for explaining the first concavo-convex portion.
6 is a partial perspective view showing the outer circumferential surface of the second drum to explain the second concave-convex portion.
Fig. 7 is a partial cross-sectional view along the BB line shown in Fig. 4 for explaining the discharge portion. Fig.
8 is an enlarged view of an enlarged view of a portion D in Fig. 7 for explaining a discharge portion.
9 is a partial cutaway plan view for explaining a discharge portion;
10 is a partial cross-sectional view along the CC line shown in Fig. 4 for explaining the locking portion. Fig.
11 is a perspective view for explaining a locking part.

Hereinafter, a method of cleaning the tub 20 of the drum washing machine and the drum washing machine according to various embodiments of the present invention will be described in detail with reference to the drawings. 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 is noted that the terms "comprise", "comprising", and the like in the present application are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, And does not preclude the presence or addition of one or more other features, integers, 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 to store washing water in the cabinet 10; a motor 14 installed in the tub 20 to generate a driving force; a rotary shaft 17 connected to the motor 14; A first drum 30 connected to the rotary shaft 17 to wash the laundry by the driving force transmitted from the motor 14, a first drum 30 detachably installed in the first drum 30, And a second drum 50 separated from the first drum 30.

In the present specification, the washing water for washing and the washing water for washing the door are all referred to as washing water, and the first drum 30 may be referred to as a main drum and the second drum 50 may be referred to as a sub drum .

1 shows a direct drive type structure in which a motor 14 is directly connected to a rotary shaft 17 to drive a first drum 30. However, the clothes processing apparatus 1 according to an embodiment of the present invention is not necessarily limited thereto It does not.

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 insert laundry into the first drum 30 and the second drum 50 by opening and closing the door, or remove the laundry from the inside of the first drum 30 and the second drum 50.

On the other hand, the water supply part 18 is provided in the cabinet cover 11 so as to supply clean water containing no detergent or clean water to the first drum 30 and the second drum 50. The washing water discharged from the water supply unit 18 is supplied to the first drum 30 through the inside of the tub 20 selectively or to the second drum 50 by the rotation of the second drum 50 Water.

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 first drum 30 and the second 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 bend portion 21a circulates along the inner circumferential surface of the tub 20 by the rotational force of the first drum 30 to allow the washing water to be drawn into the first drum 30 to be dropped. At this time, the second drum 50 is preferably not mounted on the first 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 first drum 30, the tub 20 receives no rotational force from the motor 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 drum is rotatably installed in the tub 20, and the laundry is inserted therein. The drum of the clothes processing apparatus 1 according to an embodiment of the present invention includes a first drum 30 and a second drum 50 detachably installed in the first drum 30.

The first drum 30 is formed into a cylindrical shape having an open upper part and a substantially circular cross section and a rotating shaft 17 connected to a motor 14 composed of a rotor 15 and a stator 16 is directly connected to a lower surface of the first drum 30, (14).

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

The first drum 30 includes a first drum cover 31 provided at an upper end thereof.

The first 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. A discharge passage 47 extending in the horizontal direction is formed by the upper surface of the first 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 second drum 50 to the inside of the tub 20.

The first drum cover 31 is formed with an opening through which the laundry can be inserted or the second drum 50 can be mounted. The first 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 first drum cover 31 includes a first concavo-convex portion 315 formed on an inner circumferential surface thereof so that the second drum 50 can be detached. In addition, the first drum cover 31 is engaged with the fixing portion 93 of the second drum 50 mounted on the first concave / convex portion 315 to prevent the first drum 30 from moving upward, (312). Details of the first irregular portion 315 and the engaging portion 312 will be described later.

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

FIG. 2 is a perspective view showing the second drum 50 shown in FIG. 1, FIG. 3 is a cross-sectional view taken along the line AA shown in FIG. 2, 50).

2 to 4, the second drum 50 is provided at the upper end of the first drum 30 so as to be detachable from the inside of the first drum 30, and has a cylindrical shape with an open top and a substantially elliptical cross- .

Also, the second drum 50 is separated from the first drum 30 so as to perform washing. Accordingly, the laundry can be separated from the first drum 30 and the second drum 50 by washing according to the color or the material, so that the laundry can be washed at the same time, so that the number of times the clothes processing apparatus 1 is operated The washing water, the detergent and the energy can be prevented from being wasted.

Also, since the second drum 50 receives the rotational force from the first drum 30 and rotates to perform washing, a separate driving device is not required.

The second drum 50 includes a second drum body 53 formed in a cylindrical shape with an open upper portion, a second drum cover 51 detachably coupled to an upper end of the second drum body 53, A discharge unit 70 for discharging the washing water in the second drum 50 to the outside and a second drum 50 seated on the first drum 30 are disposed on the first drum 30 And a locking portion 90 for releasing the engagement and disengagement.

The second 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 second drum body 53 is formed in an elliptical shape in cross section, the vortex is generated by rotation more effectively than the drum having a circular cross section. Since the friction between the laundry and the laundry is increased by the vortex, the second drum 50 can increase the washing power by the elliptical cross section.

4, the second 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). ≪ / RTI >

The first curvature portion C1 is formed at a position facing each other of the second drum body 53 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 first drum cover (31).

The second curvature portion C2 is provided at a position facing each other of the second drum body 53, 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.

The inner circumferential surface of the second drum body 53 is larger than the first distance from the center of rotation of the second drum 50 and the near portion C2 spaced a first distance from the center of rotation of the second drum 50 And a remote part C1 spaced apart by a second distance. 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 near portion C2 and the inner circumferential surfaces of the first 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.

A portion of the inner circumferential surface of the second drum body 53 indicated by the second curvature portion C2 is formed as a curved surface. However, 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 second drum body 53 and the second drum cover 51 is named using the above terms.

On the other hand, the second drum body 53 is not provided with the through holes 33 on the circumferential surface of the second drum 50, unlike the case in which the through holes 33 are provided on the circumferential surface of the first drum 30. Therefore, the second drum body 53 can receive the washing water and the laundry, and the washing water is not discharged into the first drum 30 through the circumferential surface or the lower surface. Therefore, the washing water stored in the tub 20 is only drawn into the first drum 30 through the through holes 33 and is not drawn into the second drum 50.

The friction ribs 534 protrude from the inner circumferential surface of the second 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 second drum body 53. The friction rib 534 rotates the washing water in the rotating direction of the second drum body 53 by the frictional force with the washing water when the second 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 second drum cover 51 is coupled to the upper end of the second drum body 53 and has a transverse section identical to the transverse section of the second drum body 53.

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

The second drum cover 51 includes a laundry inlet 580 formed on an upper surface for loading laundry, a slope guide 581 formed along an inner circumferential surface of the laundry inlet 580, a handle portion An inner water supply guide 560 for guiding the wash water discharged from the water supply unit 18 to the inside of the second drum 50 and an inner water supply guide 560 for guiding the wash water discharged from the water supply unit 18 to the second drum 50 An outer water guide 570 for guiding the inside of the first drum 30 through the outside of the drum body 53 and a guide rib 531 for raising washing water circulating around the inner circumferential surface of the second drum body 53 upward.

The handle 510 includes a handle body 511 formed by a pair on the upper surface of the second drum cover 51 and extended by a predetermined length, (971). The operating portion 971 is also a first bend portion 971 constituting the second frame 97 of the locking portion 90 to be described later.

The handle 510 is provided adjacent to the first curvature portion C1 of the second drum cover 51, that is, the remote portion C1. The second drum 50 can vibrate up and down when the washing water leaks due to an impact when the user separates the second drum 50 from the first drum 30. [ When the handle 510 is provided adjacent to the second curvature portion C2, i.e., the near portion C2, the user must exert a lot of force to calibrate the vibration of the second drum 50, 510 are advantageously provided adjacent to the remote part C1.

The inner water supply guide 560 is provided on the upper surface of the second drum cover 51, and is provided at 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 second drum cover 51 so that the wash water discharged from the water supply portion 18 is not scattered to the upper surface of the second drum cover 51 do.

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 formed in the second water supply channel 562 for guiding the wash water to the second drum 50. The water supply hole 562 is formed in the second water supply channel 562).

The washing water discharged from the water supply unit 18 is temporarily stored in the concave portion 561 and is not scattered around the second drum cover 51. Thereafter the water supply hole 562 or the second water supply channel 562 To the laundry loading port 580 and guided into the second drum 50.

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 second drum cover 51.

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

The outer water supply guide 570 is formed such that a corner portion of the spacing portion C2 is recessed inside the second drum cover 51 and the bottom surface is formed to be inclined downward to the outside of the second drum cover 51. [ The washing water discharged from the water supply unit 18 is supplied to the first 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 first drum 30. [ .

The guide ribs 531 are formed in a plate shape and are provided below the upper surface of the second drum cover 51 and extend downward. Further, the guide rib 531 is provided so that one side thereof contacts the inner peripheral surface of the second drum body 53. In other words, the plate-shaped guide ribs 531 are engaged with the second drum cover on the upper side, and one side is in contact with the inner peripheral surface of the second drum bite 53. The washing water in the second drum body 53 rotates along the inner circumferential surface of the second drum body 53 by the rotational force of the second drum 50 and then rises due to the collision with the guide rib 531.

Specifically, the guide ribs 531 extend from the rib vertical portions 975 and 532 and the rib vertical portions 975 and 532 extending downward from the upper surface of the second drum cover 51 to the second drum 50, And a rib inclined portion 533 extending downwardly sloping toward the inner circumferential surface of the rib portion 533.

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

Since the rib inclined portion 533 is formed on one side of the guide rib 531, the laundry that rotates together with the washing water in the second 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 second drum 50 rotates at a high speed, the water surface of the washing water on the inner circumferential surface of the second drum body 53 is higher than the water surface of the washing water in the central portion of the second 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 second drum 50 rotates at a relatively low speed, a sufficient amount of wash water can be raised by arranging the guide ribs 531 in the near portion C2 of the second drum cover 51. [ The amount of washing water passing through the imaginary cross section from the center of the second drum body 53 to the near portion C2 and the imaginary cross section from the center of the second drum body 53 to the remote portion C1 The amount of wash water is the same.

Therefore, when the height of the washing water passes through the imaginary cross section from the center of the second drum body 53 to the near portion C2, a virtual cross section from the center of the second drum body 53 to the far portion C1 The guide ribs 531 can raise a sufficient amount of wash water even if the second 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 ribs 531 are viewed along the radial direction, the width of the lower end face may be smaller 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 second drum 50 is 399 mm and the height is 309.2 mm, the guide ribs 531 are formed such that the height H is 70 mm and the width W is 65 mm And exhibits high washing power with the inclination guide 581 described later. 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 second 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 formed to be inclined downward toward the inside of the second 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 moved horizontally along the lower side of the upper surface of the second drum cover 51 via the upper portion of the inner circumferential surface of the second drum body 53 It generally falls freely into the interior of the second 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 second drum cover 51, and 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 a suddenly changed moving direction collides against the laundry contained in the second drum body 53 more strongly than it is free to fall. 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 washing water is changed is larger. Accordingly, a very strong impact is transmitted to the laundry contained in the second 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 second drum 50 rotates at a very high rotational speed, the washing water contained in the second 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 bounced washing water to the inside of the second drum 50 along the upper surface.

Hereinafter, the structure in which the second drum 50 is attached to and detached from the first drum 30 will be described with reference to FIGS. 5 and 6. FIG. 5 is a partially cutaway perspective view showing the inner circumferential surface of the first drum cover 31 for explaining the first concave-convex portion 315. Fig. 6 is a partially cutaway perspective view of the second drum 50, Fig.

5 and 6, the first drum 30 includes a first concavo-convex portion 315 formed on an inner circumferential surface thereof, and the second drum 50 is formed on an outer circumferential surface thereof and is engaged with the first concavo-convex portion 315 And a second concave-convex portion 535 formed to be seated.

Concretely, the second concave-convex portion 535 is formed on the coupling portion C1 of the outer circumferential surface of the second drum body 53, and the first concave-convex portion 315 is formed on the inner circumferential surface of the first drum cover 31. [ It is preferable that the second concavo-convex portion 535 is not formed on the outer peripheral surface of the second drum cover 51. [ This is because the second drum cover 51 can be separated from the second drum body 53 by the weight of laundry and laundry contained in the second drum body 53.

The first concave-convex portion 315 includes at least one first projection 753 portion 316, at least one first projection portion 753 groove portion 317 and a first projection portion 753 portion 316, And a first projection slope portion 318 connecting the groove portion 317 and formed flat without being bent.

The first protrusions 753 are formed so as to be convexly curved upward and the first protrusions 753 have a shape corresponding to the first protrusions 753, .

The second concavo-convex portion 535 is formed in a shape corresponding to the first concavo-convex portion 315 and includes at least one second projection 754 portion 536, at least one second projection portion 754 portion 536, At least one second protrusion 754 formed in a concave shape corresponding to the first protrusion 754 and the second protrusion 754 and a second protrusion 754 connecting the second protrusion 754 and the second protrusion 754, (538).

The second projection 754 is formed to be convexly curved downward and the second projection 754 has a shape corresponding to the second projection 754 and the groove 537 is recessed downward .

The second concave-convex portion 535 is formed in a shape corresponding to the first concave-convex portion 315. When the second drum 50 is placed on the first drum 30, the second projection 754 portion 536 is seated in the first projection 753 groove portion 317, (537) is seated on the first projection (753) portion (316).

On the other hand, the peak of the second projection 754 and the peak of the first projection 753 form a substantially horizontal portion, respectively. When the user tries to seat the second drum 50 on the first drum 30, the second projection 754 is inserted into the groove portion 317 of the first projection 753 There is a problem in that it does not settle.

For example, when the curvature of the curved portion of the first projection 753 portion 316 and the second projection portion 754 portion 536 is excessively small, the area occupied by each of these horizontal portions is large. Therefore, when the user tries to seat the second drum 50 on the first drum 30, the second projection 754 can not be seated in the groove portion 317 of the first projection 753, A problem may arise that it is seated on the peak of the light emitting portion 753 (316).

However, if the curvature of the curved portion of the curved portions of the first projection 753 and the second projection 754 is sufficiently large, even if these horizontal portions meet each other, the second projection 754 ) Portion 536 slides along the first projection slope portion 318 and can be easily seated in the groove portion 317 of the first projection 753. [

Therefore, the size and shape of the first concave-convex portion 315 and the second concave-convex portion 535 need to be appropriately adjusted. For example, in the second concave-convex portion 535, five second protrusions 754 are formed in each of the pair of engaging portions C1, the distance between the second protrusions 754 is about 35 mm, The length from the lowermost end of the groove portion 537 to the peak of the second projection 754 portion 536 may be about 17.5 mm.

On the other hand, as the second concave-convex part 535 is seated while being engaged with the first concave-convex part 315, the second drum 50 rotates by the rotational force of the first drum 30. In this case, for example, when the first drum 30 rotates at a high speed, the second projection 754 portion 536 can move upward along the first projection slope portion 318. Accordingly, the second drum 50 can be separated from the first drum 30 by the high-speed rotation of the first drum 30. [

This phenomenon may occur because the inclination angle of the first projection slope portion 318 is excessively large with respect to the gravity direction. In order to prevent this, for example, the first projection slope portion 318 may be formed to be inclined by about 10 degrees with respect to the gravity direction.

Likewise, the second projection slope 538 can be tilted by about 10 degrees with respect to the gravity direction to increase the friction between the second projection slope 538 and the first projection slope 318 that are in close contact with each other.

On the other hand, if the second projection slope portion 538 is formed parallel to the gravity direction, the second drum 50 may collide with the first drum 30 when the second drum 50 is seated on the first drum 30, which is not preferable.

The second drum 50 may be prevented from detaching from the first drum 30 by being engaged with the first drum 30 by the locking portion 90 which will be described later while being seated on the first drum 30.

On the other hand, the engaging portion C1 of the second drum cover 51, that is, the remote portion C1 is seated on the inner circumferential surface of the second drum 50, but the spacing C2, i.e., the near portion C2, 50 from the outer circumferential surface. Therefore, when the second drum 50 rotates at a high speed, the near portion C2 can vibrate up and down unlike the remote portion C1 due to a tendency of the laundry and the washing water to lean. In other words, if the longest distance between the distant parts C1 of the second drum body 53 is taken as a length, a kind of rolling phenomenon may occur.

At this time, if the first projection 753, the first projection 753, the third projection 754, and the second projection 754 are formed to be angled The first protrusions 753 and the second protrusions 754 of the first protrusions 754 and the second protrusions 754 are formed in the groove portions 537 and the first protrusions 753 by the rolling phenomenon, As shown in Fig. The second protrusions 754 and the first protrusions 753 are separated from each other by the angled portions of the first protrusions 753 and the second protrusions 754, The stress may concentrate in a part of the brittle fracture. Therefore, the first protrusion 753 and the second protrusion 754 formed in a curved shape and the second protrusion 754 formed in a curved shape to have the same curvature as the first protrusion 753 and the second protrusion 754, The protrusion 753 grooves 317 prevent the stress concentration considerably by allowing the load to be distributed evenly, and the strength is extremely excellent.

The first protrusions 753 and the second protrusions 754 are formed to be curved so that the second protrusions 754 and the first protrusions 753 are formed in a curved shape, And can be relatively easily rotated while being accommodated in the groove portion 317. The first protrusions 753 and the second protrusions 754 are separated from the second protrusions 754 and the first protrusions 753 by the second protrusions 754 and the third protrusions 753, The contact area between the first protrusion 753 portion 316 and the second protrusion portion 754 is slightly reduced because the protrusion slope portion 538 and the first protrusion slope portion 318 are slightly raised . As a result, the stress is still concentrated.

Therefore, in order to prevent the rolling phenomenon, which is a phenomenon in which the remote part C1 of the second drum body 53 vibrates up and down, the first irregular portion 315 and the second irregular portion 535 have first tilts Preventing portion 319 and a second anti-tilt preventing portion 539 which is in surface contact with the first anti-tilt preventing portion 319.

The first anti-tilt portion 319 and the second anti-tilt portion 539 are in surface contact with each other to prevent the rolling phenomenon, thereby preventing local destruction due to stress concentration.

Hereinafter, the discharging portion 70 will be described in detail with reference to Figs. 7 to 9. Fig. FIG. 7 is a partial cross-sectional view along the BB line shown in FIG. 4 for explaining the discharge portion 70, FIG. 8 is an enlarged view of the portion D in FIG. 7 to explain the discharge portion 70, 9 is a partial cutaway plan view for explaining the discharge portion 70;

7 to 9, the discharge unit 70 is formed as a pair in the pair of first curvature portions C1, that is, the remote portion C1, and the second drum 50 is rotated And discharges the washing water selectively to the outside of the second drum 50 according to the magnitude of the centrifugal force generated by the washing water.

The discharge unit 70 includes an inlet hole 77 for introducing washing water rising along the inner circumferential surface of the second drum body 53, a check valve 71 for selectively passing washing water having passed through the inlet hole 77, A depressurizing portion 73 for depressurizing the wash water having passed through the check valve 71, a discharge hole 79 for discharging the wash water having passed through the depressurizing portion 73 to the outside of the second drum 50, (71) and a pressure receiving portion (73).

The seat part (75) is integrally formed at the edge of the second drum cover (51). So that the washing water rising along the inner circumferential surface of the second drum body 53 flows smoothly due to the centrifugal force due to the rotation of the second drum 50.

The height of the discharge portion 70 is determined so that the wash water can flow into the discharge portion 70 even if the wash water rises up to a predetermined height along the inner circumferential surface of the second drum body 53, Thereby being formed at an appropriate height. 7, the lower portion of the seating portion 75 is located on the upper side of the second drum cover 51 in consideration of the fact that the highest water level of the washing water is set to be lower than the height of the second drum cover 51. [ Is formed on the lower side of the face.

The seat portion 75 is provided with a vertical extension portion 751 extending from the upper surface of the second drum cover 51 in the downward direction and an end portion of the vertical extension portion 751 toward the edge of the second drum 50 And a horizontal extending portion 752 extending in the horizontal direction.

Specifically, the vertical extending portion 751 extends downward from the bottom portion of the concave portion 561 and supports one side of the pressure-reducing portion 73 to be described later.

The horizontal extending portion 752 is connected to the lower end of the vertical extending portion 751 and includes a first projection 753 and a second projection 754 protruding upward. The first projection 753 engages with the engagement groove 717 of the check valve 71 to be described later and the second projection 754 interferes with the rotation unit 713 to be described later, .

The inlet hole 77 is formed adjacent to the inner circumferential surface of the second drum body 53 so that the washing water flowing along the inner circumferential surface of the second drum body 53 is easily introduced into the horizontal extending portion 752.

The check valve 71 is provided so as to come in contact with the inner peripheral surface of the second drum body 53 while one end of the check valve 71 is seated on the seat portion 75. The check valve 71 is connected to the contraction portion 711 which is contracted by centrifugal force, the cutout groove 712 which penetrates the contraction portion 711 to allow the washing water to pass therethrough and the contraction portion 711, And a horizontal supporting portion 715. The horizontal supporting portion 715 and the horizontal supporting portion 715 rotate in the horizontal direction.

The contraction portion 711 is provided so as to be in contact with the inner circumferential surface of the second drum body 53 at one end, and is formed of a soft material so as to be contracted by an external force. Here, the force exerted from the outside means the centrifugal force due to the rotation of the second drum 50.

The constricted portion 711 may be provided at various angles within the seating portion 75, but is disposed along a direction in which the centrifugal force acts so as to shrink sufficiently when the same centrifugal force acts. As shown in FIG. 9, the shrinkable portion 711 may be provided along the outer circumferential surface of the second drum cover 51.

The incision groove 712 penetrates the constriction portion 711 and is formed to be opened by contraction of the constriction portion 711. In particular, the incision grooves 712 are formed along the direction in which the centrifugal force acts so as to be effectively opened when the centrifugal force acts.

When the centrifugal force acts on the constricted portion 711, both side portions of the incisional groove 712 move in the direction away from the incisional groove 712, and the incisional groove 712 can be opened. Accordingly, the incision groove 712 allows the wash water to pass therethrough.

The rotation part 713 has one end connected to the contracting part 711 and the other end connected to the horizontal supporting part 715 and extending so as to cross the direction in which the centrifugal force acts. Here, the horizontal support portion 715 to be described later is fixed to the seating portion 75.

If the check valve 71 is formed in the shape of a plate including the constricted portion 711 and is fixed to the seating portion 75 while being arranged substantially horizontally in the direction in which the centrifugal force acts, The horizontal supporting portion 715 pulls the retracted portion 711, so that the retracted portion 711 can not be sufficiently contracted.

To this end, the rotation part 713 is formed so that one end connected to the contracting part 711 is freely movable from a part fixed to the mounting part 75, thereby allowing the contracting part 711 to contract more smoothly .

The horizontal support portion 715 is provided so as to be in surface contact with the horizontal extension portion 752 of the seating portion 75. The horizontal support portion 715 is formed at the lower side with a coupling groove 717 engaging with the first projection 753 of the seating portion 75. [ One end of the horizontal support portion 715 is connected to the other end of the rotation portion 713 and the other end thereof is supported by one side of the seating portion 75 or one side of the decompression portion 73.

The depressurizing portion 73 is detachably coupled to the seat portion 75 and is provided above the check valve 71. The depressurizing portion 73 depressurizes the water pressure of the washing water that has passed through the check valve 71 to discharge the washing water through the discharge hole 79.

The depressurizing portion 73 includes a first collecting portion 731 for collecting wash water passing through the check valve 71, a second collecting portion 732 for collecting washing water moved from the first collecting portion 731, A third collecting portion 733 that collects the wash water that has been moved from the collecting portion 732 before being discharged to the outside through the discharge hole 79 and a third collecting portion 733 that communicates the first collecting portion 731 and the second collecting portion 732 And a second through hole 737 for communicating the first through hole 735 and the second collecting portion 732 with the third collecting portion 733.

The first through hole 735 is located on a different hardness from the incision groove 712 and the second through hole 737 is formed on a different hardness from the first through hole 735. Therefore, even if the washing water passes through the open cut-out groove 712, the washing water must move along the curved flow path to pass through the first through-hole 735, and even if the first through- It is necessary to move along the bent path again in order to pass through the opening 737. The wash water is decompressed every time it moves along the bent path. That is, the decompression unit 73 can regulate the amount of wash water discharged through two depressurization.

On the other hand, the first to third collecting units 733 can collect lint separated from the laundry. The user removes the decompression portion 73 from the seat portion 75 and removes the lint from the first to third collectors 731, 732 and 733, And can be coupled to the seat portion 75.

Hereinafter, the locking portion 90 will be described in detail with reference to FIGS. 10 and 11. FIG. 10 is a partial cross-sectional view along line C-C shown in FIG. 4 for explaining the locking portion 90, and FIG. 11 is a perspective view for explaining the locking portion 90. FIG.

10 and 11, the locking portion 90 prevents the second drum 50 from being separated from the upper portion when it rotates at a high speed after the second drum 50 is seated on the first drum 30.

The locking portion 90 includes a locking portion 312 protruding from the inner circumferential surface of the first drum 30 and a fixing portion 93 coupled to the locking portion 312 to limit the vertical movement of the second drum 50, A first frame 95 provided on the fixing part 93 and a second frame 97 slidable in the vertical direction.

The engaging portion 312 protrudes from the inner circumferential surface of the first drum 30 and includes a downwardly bent portion 313 bent downwardly and extending upwardly and an upper surface of the engaging portion 312, And an upper inclined portion 314 formed to be inclined downward toward the inner circumferential surface of the base plate 314. [

The downward bent portion 313 prevents the fixing portion 93 from moving upward while abutting against the upper surface of the fixing portion 93. [ In addition, the downward bending portion 313 can effectively prevent the second drum 50 from deviating upward even if the engagement portion 312 is bent upward due to the up-and-down vibration of the second drum 50. [

For example, when the engaging portion 312 is bent upward in a certain angle range, the distal end of the downward bent portion 313 rotates upward and moves to the second drum cover 51 side. The point where the engaging portion 312 and the fixing portion 93 abut each other moves to the inside of the second drum cover 51 along the upper surface of the fixing portion 93. [

If the downward bent portion 313 is not formed in the locking portion 312, a point where the locking portion 312 and the fixing portion 93 abut each other as the locking portion 312 is bent upward, It will move to the outside of the second drum cover 51 along the upper surface and then escape from the fixing portion 93 at a specific time.

The upper inclined portion 314 is formed at a lower height than the discharge hole 79. The upper inclined portion 314 rises along the inclined surface of the washing water discharged from the discharge hole 79 without being discharged to the first drum 30 by the falling water on the upper inclined portion 314, To be discharged.

The fixing part 93 is accommodated inside the second drum cover 51 so that a part of the fixing part 93 can be drawn in and drawn out. When the fixing portion 93 is pulled out of the second drum cover 51, the upper surface is interfered with the bent portion of the engaging portion 312. The upward movement of the second drum 50 is restricted.

The fixing portion 93 includes a fixed body 931 formed in a bar shape, a rack 933 formed on the upper surface of the fixed body 931 and engaged with the pinion 934, and a fixed body 931, And an upper protruding portion 937 formed on the upper surface of the base plate 930. [

The fixed body 931 is arranged to protrude to the outside of the second drum cover 51. The fixed body 931 is reciprocated by the forward and reverse rotation of the pinion 934 engaged with the rack 933,

The rack 933 is formed on the upper surface of the distal end of the fixed body 931 and serves to convert the rotational motion of the pinion 934 into linear motion while being engaged with the pinion 934.

The pinion 934 is provided on the lower side of the first frame 95 and rotatably connected to the first frame 95 through the first pin 936. The pinion 934 is connected to the second frame 97 via the pinion connection, And receives the force from the second frame 97.

The pinion connecting portion includes a first first pinion connecting portion 935 formed on one side of the pinion 944 and a second pinion connecting portion 973b coupled to the second frame 97. [

The first first pinion connecting portion 935 is formed so as to protrude in the radial direction on the outer peripheral surface of the pinion 934. The first first pinion connecting portion 935 is fixed on the outer peripheral surface of the pinion 934 and can be manufactured integrally with the pinion 934. [

The second pinion connecting portion 973b is rotatably connected to the first pinion connecting portion 935 through a second pin and is connected to the second frame 97 so as to reciprocate linear motion.

Accordingly, the pinion 934 rotates in conjunction with the reciprocating linear motion of the second frame 97.

The upper protruding portion 937 is interfered by the tension bar 957 of the first frame 95 so that the fixing portion 93 moved to the outside of the second drum cover 51 by the pinion 934 And is then drawn back into the second drum cover 51.

The first frame 95 is provided on the upper side of the fixing part 93 and is formed in a bar shape. The upper surface of the first frame 95 also forms a part of the side surface of the concave portion 561, a part of the bottom portion, and a part of the outer surface of the second drum cover 51. Accordingly, both ends of the first frame 95 are formed with portions bent upward. On the other hand, the flange is formed on both sides of the first frame 95 and engaged with the second drum cover 51.

The first frame 95 has a first bent portion 951 bent at one end thereof, a pair of second bent portions 953 bent upward at the other end thereof, and a first bent portion 951 A tension bar 957 formed on the lower surface of the first frame 95 so as to protrude from the lower surface of the first frame 95; And includes a pair of horizontal guides 958 and a pinion support portion 959 for rotatably supporting the pinion 934.

The first bent portion 951 is once bent upward so that the upper surface thereof forms a part of the bottom portion and the side surface of the concave portion 561. In addition, the first bent portion 951 is formed so that the upper surface thereof is bent downward so as to form a part of the side surface of the second drum cover 51. The first bent portion 951 bent downward is formed with a side hole 955 extending downward to a height at which the fixing portion 93 is located, and the fixing portion 93 can pass through the end.

The tension bar 957 is provided at a downwardly concave portion of the first bent portion 951 and extends downward. The tension bar 957 is made of a material having elasticity, and the length of the tension bar 957 is adjusted according to the height of the concave portion. Accordingly, the elastic force transmitted to the upper protruding portion 937 can also be adjusted.

The horizontal guide 958 extends downward from the lower surface of the first frame 95 and is formed such that the distal end thereof is appropriately spaced from the fixing portion 93. The horizontal guide 958 allows the fixing portion 93 to be horizontal. That is, the horizontal guide 958 prevents any portion of both sides from tilting when the fixing portion 93 reciprocates in the longitudinal direction.

The pinion supporting portions 959 are provided as a pair and rotatably support the first pin 936 passing through the rotation center of the pinion 934. [

The second bent portions 953 are formed as a pair, and the other end of the first frame is formed in a Y-shape and is provided on the lower side of the handle 510. The second bent portion 953 restricts the downward movement of the second frame 97 within a certain range by interfering with the lower side of the first bent portion 971 which will be described later. Therefore, the second bent portion 953 can be referred to as a stopper.

The upper surface of the pair of second bent portions 953 forms a part of the bottom surface and side surface of the concave portion 561. Further, the pair of second bent portions 953 form a water supply hole 562 together with the first curve portion 971.

The second frame 97 is formed in a square frame shape having a hollow and is provided on the lower side of the handle 510. The second frame 97 engages with the second drum cover 51 so as to be vertically slidable.

The second frame 97 includes a first curved portion 971 that contacts the lower side of the handle 510, a pair of vertical portions 975 that support the first curved portion 971, and a pair of vertical portions 975, And a second bend section 973 provided below the first bend section 971.

The first bend section 971 is provided so as to be partially inserted into the concave portion formed on the lower side of the handle 510. That is, the middle portion of the first curve portion 971 is partially inserted into the lower concave portion of the handle portion 510.

The first bending portion 971 is formed such that both ends thereof are supported by the pair of vertical portions 975 and the middle portion thereof is curved toward the outside of the second drum cover 51. [

The vertical portion 975 is provided below the first curve portion 971 and is fixed to both ends of the first curve portion 971. The vertical portion 975 is movably engaged with the second drum cover 51 so that the second frame 97 is movable up and down. In other words. The vertical portion 975 is coupled to the second drum cover 51 through a slit groove 975a extending vertically on one side.

The second curve portion 973 has both ends fixed to the pair of vertical portions 975 to support the pair of vertical portions 975 and to be curved toward the outside of the second drum cover 51. The second bend section 973 is provided with a second pinion connection section 973b at the center thereof.

The second pinion connection portion 973b is coupled to the second curve portion 973 so as to be capable of reciprocating linear motion, and the second pin 973a is rotatably coupled to one side. The second pin 973a is rotatably coupled to one end of the first pinion connection portion 935. [

Accordingly. The second curve portion 973 can rotate the pinion 934 only by ascending with the pair of vertical portions 975 without horizontal movement.

When the user grasps the first bent portion 971 together with the handle 510 and applies a force to the upper portion of the second frame 97, the entire second frame 97 slides upward to rotate the pinion 934, In and out. Therefore, the first curve portion 971 may be referred to as an operating portion 971. [

Hereinafter, the operation of the clothes processing apparatus 1 configured as described above will be sequentially described with reference to the drawings.

First, the user separates the laundry, which is not suitable for washing together, into two groups so as to be accommodated in the first drum 30 and the second drum 50, respectively.

Next, the user holds the second drum 50 on the upper end of the first drum 30 while holding the handle 510 of the second drum 50 to engage with the first drum 30 .

The user applies force to the operating portion 971 when pushing the pull and pushes it into the inside of the pull. As a result, the second frame 97 rises.

The second pinion connection portion 973b rises with the second frame 97 and rises in a curve unlike the second frame 97 which rises with a straight line. That is, the second pinion connecting portion 973b moves upward to the right side in FIG. 11 while moving upward.

The pinion 934 connected to the second pinion connecting portion 973b through the first pinion connecting portion 935 rotates counterclockwise in Fig.

The fixing portion 93 connected to the pinion 934 through the rack 933 is moved to the right in Fig. 11 and the front end of the fixing portion 93 is drawn into the inside of the second drum cover 51. Fig. The second drum 50 can be lowered into the first drum 30 without interference between the fixing portion 93 and the engaging portion 312. When the second drum 50 is lowered, the second concave-convex portion 535 is seated on the first concave-convex portion 315. Through this process, the second drum 50 is seated on the upper end of the first drum 30.

When the second drum 50 is seated on the first drum 30, the user releases the force applied to the operating portion 971. [ The fixing portion 93 is moved to the left side by the elastic force of the tension bar 957 pushing the upper protruding portion 937 to the left. Accordingly, the pinion 934 rotates clockwise on Fig. The pair of vertical portions 975 and the second curved portion 973 descend and the operation portion 971 returns to the home position.

When the second drum 50 is seated on the upper end of the first drum 30 and then engaged with the first drum 30, .

First, the first drum 30 starts to rotate. The second drum 50 receives the rotational force of the first drum 30 through the first concave and convex portions 315 and the second concave and convex portions 535 and rotates together with the first drum 30.

At this time, the first drum 30 is rotated by a predetermined angle so that the inner water supply guide 560 is positioned below the water supply unit 18. When the inside water supply guide 560 is positioned below the water supply unit 18, the water supply unit 18 starts water supply of the wash water in which the detergent is dissolved. The supplied washing water temporarily stays in the concave portion 561 and is supplied to the inside of the second drum body 53 through the second water supplying passage 562.

When the water supply to the second drum body 53 is completed, the first drum 30 rotates again by a predetermined angle to position the outer water supply guide 570 below the water supply unit 18. When the outer water supply guide 570 is positioned below the water supply unit 18, the water supply unit 18 starts water supply. The water supply water is supplied into the tub 20 along the first water supply passage 573 after colliding with the outer water supply guide 570. The washing water supplied into the tub 20 is drawn into the first drum 30 through the through holes 33.

When the water supply is completed, the first drum 30 starts to rotate in order to perform a washing process, i.e., a washing cycle, a rinsing cycle and a dewatering cycle. Since the second drum 50 receives the rotational force from the first drum 30, the second drum 50 rotates at the same rotational speed as the first drum 30.

When the second drum 50 rotates, the washing water contained in the second drum 50 rotates along the inner circumferential surface of the second drum body 53. Since the second drum 50 is formed in an elliptical shape in cross section, a vortex is formed inside. As a result, the frictional force between the laundry is increased and the washing power can be increased.

On the other hand, when the rotational speed of the second drum 50 increases, the washing water gradually rises along the inner circumferential surface while forming the fifth flow as described below.

The washing water which has begun to rise gradually collides with the guide rib 531 and rises at a high speed. The washing water is then horizontally moved along the lower side of the upper surface of the second drum cover 51 through the upper part of the inner circumferential surface of the second drum body 53 and then abruptly moved downward by the lower surface of the inclined guide 581 The direction of movement is changed. The washing water having a suddenly changed moving direction collides with the laundry contained in the second drum body 53 at a high speed. The washing power is increased by the fifth flow of the washing water.

On the other hand, the washing water in the second drum 50 rotating at a high speed partly rises due to collision with each other, falls on the inclined guide 581 formed on the laundry inlet 580, and collected on the second drum 50 Flow 46 is formed. .

Since the second drum 50 is coupled with the first drum 30 only at the remote portion C1, that is, the coupling portion C1, when the laundry or the like rotates at a high speed while being tilted, the near portion C2, May vibrate up and down to cause a rolling phenomenon. At this time, the rolling phenomenon can be relieved by the first and second anti-tilt portions 319 and 539.

On the other hand, the angles of the first projection slope portion 318 and the second projection slope portion 538 are set to about 10 degrees with respect to the gravity direction. Accordingly, even if the first drum 30 rotates at a high speed, the second projection 50 is moved from the first drum 30 to the second projection 30 as the second projection slope 538 rises along the first projection slope 318 It is not easy to escape.

Even if the first drum 30 rotates at a high speed such that the second projection slope 538 rises along the first projection slope 318, So that the second drum 50 does not separate from the first drum 30. As shown in FIG.

When the washing process is performed, simple dehydration may be performed in addition to the dehydration process as well as the dehydration process. At this time, the second drum 50 needs to discharge the washing water to the outside. It is preferable to discharge the washing water of the second drum 50 to the first drum 30 as much as accommodating the laundry to be washed separately I do not.

When the second drum 50 rotates at a high speed for dewatering, the washing water is discharged to the outside through the discharge portion 70.

Specifically, the washing water forms a first flow 41 rising along the inner circumferential surface of the second drum 50.

The wash water then forms a second flow 42 through the inlet hole 77 and into the check valve 71. The second flow 42 does not pass through the check valve 71 until the second drum 50 rotates at a high speed.

When the second drum 50 rotates at a high speed, the check valve 71 opens and the wash water forms the third flow 43 passing through the depressurizing portion 73. The third flow 43 is reduced in pressure twice as it passes through the decompression section 73.

The washing water then forms a fourth flow 44 which is discharged to the outside of the cup of the second drum 50 through the discharge hole 79. A part of the fourth flow 44 rides up the upper slope part 314 and is discharged to the tub 20. [

As described above, the washing water passes through the opened check valve 71 and then is discharged through the side surface of the second drum 50 through the depressurizing portion 73, and is discharged toward the upper side of the first drum cover 31 . The discharged wash water is drawn into the tub 20 beyond the upper side of the first drum cover 31 by the centrifugal force. The washing water of the second drum 50 drawn into the tub 20 is not drawn into the first drum 30 through the through hole 33 and is discharged to the outside of the tub 20 through the drain pump 11 .

On the other hand, the second drum 50 can rotate at high speed for washing, not dehydration. At this time, the wash water of the second drum 50 should be stored for washing, and it is not preferable that the wash water is discharged through the discharge unit 70 as in the case of dewatering. Therefore, the check valve 71 and the depressurizing portion 73 are set such that the wash water can not pass easily at the rotational speed for washing, considering that the rotational speed for washing is lower than the dehydrating rotational speed.

When the washing process is completed, the user can separate the second drum 50 from the first drum 30 in a reverse order to the order in which the second drum 50 is seated on the first drum 30 and coupled.

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: a tub 30: a first drum
31: first drum cover 312:
315: first irregular portion 319: first irregular portion
41 to 46: first to sixth flows 50: second drum
51: second drum cover 560: inner water supply guide
570: outer water supply guide 53: second drum body
531: Guide rib 535: Second concave / convex portion
539: second anti-tilt portion 70:
71: Check valve 73: Pressure reducing portion
75: seat portion 77: inlet hole
79: Exit hole 90: Locking part
93: fixing part 95: first frame,
97: second frame 971: first bend section or operating section

Claims (11)

A tub for receiving wash water;
A first drum rotatably installed in the tub;
A second drum detachably installed in the first drum, the second drum being washed and separated from the first drum;
A first irregular portion provided on an inner circumferential surface of the first drum; And
And a second concave-convex portion provided on an outer circumferential surface of the second drum and configured to be seated while being engaged with the first concave-convex portion. The method according to claim 1,
And the second concavo-convex portion is formed in a shape corresponding to the first concavo-convex portion. 3. The method of claim 2,
The second concavo-
At least one protrusion; And
And at least one groove portion formed in a concave shape corresponding to the at least one protruding portion. The method of claim 3,
Wherein the at least one protruding portion and the groove portion are curved. The method of claim 3,
The second concavo-convex part further includes an inclined part connecting the protruding part and the groove part,
Wherein the inclined portion is inclined by 10 degrees with respect to the gravity direction. The method of claim 3,
Wherein the second drum is formed in an elliptical shape in cross section so as to form a vortex of washing water. The method according to claim 6,
The outer circumferential surface of the second drum
A spacing portion spaced from an inner circumferential surface of the first drum; And
And an engaging portion provided with the second concavo-convex portion and engaged with the inner circumferential surface of the first drum. 8. The method of claim 7,
The first drum includes a first anti-tilt portion extending from both sides of the first concavo-convex portion,
Wherein the second drum includes a second anti-tilt preventing portion that is seated on the first anti-tilt portion to prevent vertical vibration of the separation portion due to centrifugal force due to rotation. 8. The method of claim 7,
Wherein the protrusions are spaced apart at intervals of 7 degrees. The method according to claim 1,
The first drum is provided with a balancer at its upper end.
Wherein the first concavo-convex portion is provided on an inner circumferential surface of the balancer. The method according to claim 1,
The second drum includes a handle for providing a space for a user to hold,
Wherein the first and second concave and convex portions are provided on the same hardness as the handle portion.

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