EP2719809A2 - Washing machine - Google Patents
Washing machine Download PDFInfo
- Publication number
- EP2719809A2 EP2719809A2 EP13187765.6A EP13187765A EP2719809A2 EP 2719809 A2 EP2719809 A2 EP 2719809A2 EP 13187765 A EP13187765 A EP 13187765A EP 2719809 A2 EP2719809 A2 EP 2719809A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- washing machine
- protrusions
- protrusion
- polygons
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005406 washing Methods 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 230000001965 increasing effect Effects 0.000 abstract description 7
- 230000002708 enhancing effect Effects 0.000 abstract description 4
- 239000003599 detergent Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/26—Casings; Tubs
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry
- D06F23/02—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and rotating or oscillating about a horizontal axis
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
- D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/12—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a vertical axis
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/12—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a vertical axis
- D06F37/14—Ribs or rubbing means forming part of the receptacle
Definitions
- the present invention relates to a washing machine, and more particularly, to a washing machine including a drum for enhancing the washing efficiency.
- washing machines are a pulsator type washing machine or a drum type washing machine depending on a washing method.
- Each of the pulsator type washing machine and the drum type washing machine includes a tub and a drum.
- a rotary shaft of the drum where washing is performed may be provided to be perpendicular to the ground.
- a pulsator may be installed at a lower portion of the drum to generate water current.
- the pulsator stirs the laundry put into the drum together with wash water, thereby removing dirt from the laundry.
- lifters may be disposed inside the drum to lift laundry upward.
- the drum may be formed at a circumferential part thereof with through-holes that allow water of the tub to be introduced to the drum during a washing operation, and the water of the drum to be discharged during a drainage and spin dry operation.
- the through-holes are arranged on an inner surface of the drum, which is flat.
- the laundry does not easily encounter substantial friction with the inner surface of the drum, and thus resulting in a limitation to the washing efficiency.
- a washing machine includes a body, a tub, a drum, a driving apparatus, a plurality of protrusions, and at least one through-hole.
- the tub may be provided inside the body to store wash water therein.
- the drum may be rotatably provided at an inner side of the tub to accommodate laundry therein.
- the driving apparatus may be configured to rotate the drum.
- the plurality of protrusions may protrude inward from the drum.
- the protrusion may be formed by a plurality of polygons that may each have a polygonal shape.
- the at least one through-hole may be provided between adjacent protrusions among the plurality of protrusions to drain water.
- the protrusions may be spaced apart from one another.
- Each of the polygons may have a different angle with respect to a surface of the drum.
- the polygon may be a triangle having three sides.
- the plurality of triangles may gather at a center of the protrusion, to form a hexagonal shape.
- An outline of the protrusion may be a curved line such that the protrusion has an approximately circular shape.
- the plurality of through-holes may be formed at depressions that are provided more outwardly of the drum than the protrusion, that is to say further from the centre or central axis of the drum.
- the depression may be substantially flat.
- the depression may include a concave part formed by recessing at least one portion of the depression.
- An arrangement of the through-holes provided around the protrusion may have an approximately hexagonal shape.
- a washing machine includes a body, a tub, a drum, a driving apparatus, a plurality of protrusions and through-holes.
- the tub may be provided at an inside of the body to store wash water.
- the drum may be rotatably provided at an inner side of the tub to accommodate laundry therein.
- the driving apparatus may be configured to rotate the drum.
- the plurality of protrusions may protrude from the drum toward one side.
- the protrusion may be formed by a plurality of polygons that may be each provided on a different plane.
- the through-holes may be provided at an outermost area of the drum while being provided on a same plane.
- Each of the plurality of protrusions may have a predetermined pattern.
- the plurality of protrusions may be provided in a first row and a second row such that a protrusion forming the first row is disposed between protrusions forming the second row.
- Each of the plurality of through-holes may be provided between respective protrusions.
- a closest distance between the protrusions may be between d and d+10.
- Each of the plurality of polygons may be a triangle having three sides, the plurality of triangles may gather to form a hexagonal, and triangles may be disposed at a circumference of the hexagonal to form a single protrusion of the plurality of protrusions.
- a portion between the polygons may be rounded.
- An exemplary drum of the washing machine in accordance with the an embodiment of the present invention includes a protrusion having a plurality of polygons that generate frictional force between laundry and the drum, thereby increasing the washing power.
- the through-holes may be uniformly located around the protrusion, thereby preventing a spin dry water bottleneck phenomenon that occurs when water from spin dry is concentrated on a certain through-hole, and thus enhancing the spin dry efficiency.
- FIG. 1 is a cross-sectional view illustrating a washing machine in accordance with an embodiment of the present invention.
- FIG. 2 is an exploded perspective view of an exemplary drum of a washing machine in accordance with an embodiment of the present invention.
- a washing machine 1 includes a body 10 provided at a front side thereof with an inlet 11 through which laundry is put into, a tub 20 installed at an inside the body 10 to store wash water, and a drum 30 rotatably provided at an inner side of the tub 20 to accommodate laundry.
- the washing machine 1 includes a door 122 to open and close the inlet 11 of the body 10.
- the tub 20 may be slantingly installed at a predetermined angle ⁇ with respect to an installation surface of the washing machine 1 such that a front side part 20a in which an inlet thereof is formed is disposed to be higher than a rear side part 20b of the tub 20.
- the drum 30 inside the tub 20 may be slantingly installed in the same way as the tub 20.
- the configurations of the tub 20 and the drum 30 are not limited thereto, and therefore the tub 20 and/or the drum 30 may be not slantingly installed.
- the drum 30 may be rotatably supported by a rotary shaft 13 that may be coupled to a rear side part 30a of the drum 30 while passing through the rear side part 20b of the tub 20.
- a driving motor 14 may be installed at an outer side of the rear side part 20b of the tub 20 to rotate the rotary shaft 13. As the driving motor 14 rotates the rotary shaft 13, the drum 30 inside the tub 20 rotates. The driving motor 14 rotates the drum 30 at a low speed during a washing operation, and may rotate the drum 30 in one direction at a high speed during a spin dry operation.
- a detergent supply apparatus 15 may be provided to supply the inside of the tub 20 with detergent
- a water supply apparatus 16 may be provided to supply the inside of the tub 20 with wash water.
- the detergent supply device 15 may be installed adjacent to a front side of the body 20.
- the water supply apparatus 16 includes a first water supply pipe 16 connecting an external water supply pipe i6a to the detergent supply apparatus 15, a second water supply pipe 16c connecting the detergent supply apparatus 15 to the tub 20, and a water supply control valve 16d installed on the first water supply pipe i6d to control supply of water.
- a heater 17 may be installed at a lower portion of the inside of the tub 20 to heat the wash water of the tub 20.
- a heater receiving part 20c may be provided at a lower portion of the tub 20 while protruding downward to receive the heater 17 while collecting wash water therein.
- a drainage apparatus 40 may be installed to drain wash water of the tub 20, and a wash water circulation apparatus 50 may be installed to supply wash water in the tub 20 to the inside of the drum 30.
- the drainage apparatus 40 includes a first drain pipe 42 connecting to a drain port 41 formed at a lower portion of the tub 20, a drain pump 43 installed on the first drain pipe 42, and a second drain pipe 44 connecting to an outlet of the drain pump 43.
- the wash water circulation apparatus 50 includes a bypass valve 51 installed on the second drain pipe 44 at a side of the outlet of the drain pump 43, a wash water circulation pipe 52 extending from the bypass valve 51 to an inlet 31 of the drum 30, and a spray nozzle 53 installed at an outlet of the wash water circulation pipe 52.
- the bypass valve 51 converts a passage such that wash water of the outlet of the drain pump 43 is drained to the outside or flows toward the wash water circulation pipe 52.
- the bypass valve 51 may be an electromotive three way valve. If the drain pump 43 is driven in a state in which the bypath valve 51 operates to allow wash water to flow toward the wash water circulation pipe 52, the wash water in the tub 20 may be sprayed to the inside of the drum 30 through the first drain pipe 42 and the wash water circulation pipe 52. If the drain pump 43 is driven in a state in which the bypath valve 51 operates to allow wash water to flow toward the second drain pipe 44 that guides wash water to the outside, the wash water in the tub 20 may be drained.
- the drum 30 includes a rear side part 30a that may be coupled to the rotary shaft 13, a front side part 30b having an inlet 31, and a circumference part 30c provided in a cylindrical shape and having both ends coupled to the front side part 30b and the rear side part 30a, respectively.
- a plurality of lifters 33 may be installed at an inner surface of the circumference part 30c of the drum 30 to lift and drops laundry inside the drum 30 when the drum 30 rotates.
- a plurality of stirring protrusions 32 may be installed at an inner surface of the rear side part 30a of the drum 30 to improve the cleaning power.
- a plurality of protrusions 34 and a plurality of through-holes 36 are arranged on an inner surface of the drum 30.
- FIG. 3 is a drawing illustrating an exemplary drum in accordance with an embodiment.
- FIGs. 4A and 4B illustrate exemplary cross sections of protrusions that are illustrated in FIG. 3 in accordance with an embodiment.
- FIG. 4A illustrates a cross-section along A-A'
- FIG. 4B illustrates a cross-section along B-B'.
- the plurality of protrusions 34 may be provided at an inner side of the drum 30, and the plurality of through-holes 36 may be provided around the protrusions 34.
- each of the protrusions 34 may be provided to protrude from the outer side to the inner side of the drum 30, but the present invention is not limited thereto.
- the protrusion 34 includes a plurality of polygons 35 having a polygonal shape. As illustrated in the FIG. 3 , the polygons 35 each may have a triangular shape having three sides, but the present invention is not limited thereto.
- the protrusion 34 may be provided in any other polygonal shape.
- the polygons 35 may be disposed to have different angles with respect to a surface of the drum 30. That is, each of the polygons 35 may exist on a different plane. Accordingly, the protrusion 34 may be formed by the polygons 35 existing on respectively different planes.
- first protrusion 34a may protrude more inward the drum 30 than the second protrusion 34b.
- the polygon 35 may be provided as a regular triangle, or an isosceles triangle.
- a maximum distance between a point P1 and a point P2 of the protrusion 34 in a direction of a rotary shaft of the drum 30 may be defined as Si
- a maximum distance between a point P3 and a point P4 of the protrusion 34 in a circumferential direction of the drum 30 may be defined as S2.
- S1 is equal to S2.
- S1 may have a size of half to two times a size of S2.
- S2 may have a size four times a height of the triangle. When the number of triangles used exceeds twenty-four, S2 may be increased in units of multiplication by 2. For example, in a case in which the protrusion 34 is composed of forty-eight triangles, S2 may have a size six times a height of the triangle. A depth of the protrusion 34 formed on the surface of the drum 30 may be defined as S3. In a case in which the polygon 35 is a regular triangle, S1 and S2 each may have sizes five times to thirty times a size of S3.
- a larger one of S1 and S2 may have a size five times to thirty times a size of S3.
- S3 is 2mm
- one of S1 and S2 may have a size within a range between 10mm to 60mm.
- a single protrusion 34 may include a maximum number of polygons. Accordingly, the cleaning power may be increased while minimizing the damage of laundry that occurs as a result of the laundry coming into contact with the inner side of the protrusion 34.
- the polygon 35 is not limited to the triangle.
- the polygon 35 may be provided as a quadrangle, and a hexagon, for example. Sides of the polygon 35 forming an outline of the protrusion 34 may be provided in a curved line. Accordingly, the protrusion 34 may have an approximately circular shape.
- a portion between the polygons 35 forming the protrusion 34 may be rounded.
- a portion between the polygons 35 may have a radius of curvature (r) of about 0.2r to 0.5r. Accordingly, the surface of the drum 30 may be smoothly formed to prevent laundry from being damaged.
- the protrusions 34 may be spaced apart from each other.
- the protrusions 34 may have various arrangements.
- the plurality of through-holes 36 may be provided around the protrusion 34. At least one through-hole 36 may be provided between the protrusions 34.
- the through-hole 36 is illustrated as being provided in one unit thereof between the protrusions 34, but the number of the through-holes 36 provided between the protrusions 34 is not limited thereto.
- the plurality of through-holes 36 may be provided in a depression 37 that is provided further outward from the drum 34 than the protrusion 34.
- the depression 37 may be provided to be flat when the drum 30 is extended ie. the surface of the drum is laid out flat. However, in a case in which the drum 37 is rolled and bonded, the depression 37 corresponds to a curved surface.
- the through-hole 36 may be provided in the depression 37. Accordingly, the through-hole 36 may be located distant from the center of the drum 30, so that wash water is efficiently introduced and discharged due to a centrifugal force.
- the through-hole 36 may have a diameter (see, for example, d1 in FIG. 4 ) of about 1.8mm to 3.5mm.
- a gap (see, for example, G in FIG. 3 ) between adjacent portions of the protrusions 34 may have a size of the diameter (d1) of the through-hole 36 or larger and the diameter (d1) of the through-hole plus about 10mm or smaller.
- the protrusion 34 may have various arrangements.
- the protrusion 34 may be provided in a plurality of rows L1 and L2 and a plurality of columns R1 and R2.
- a row located at an upper side (see, for example, FIG. 3 ) between the rows L1 and L2 forming protrusions 34 may be defined as a first row L1
- a row located at a lower side between the rows L1 and L2 may be defined as a second row L1.
- the protrusion 34 forming the second row L2 may be located between the protrusions 34 forming the first low L1.
- the protrusion 34 forming the second row L2 may be arranged between the protrusions 34 of the first row L1 such that the protrusion 34 forming the first row L1 is provided in a zig-zag manner with the protrusion 34 forming the second row L2.
- At least one through-hole 36 is provided between the protrusions 34.
- four through-holes 36 may be provided around a single protrusion 34, but the number of the through-holes 36 around the protrusion 34 is not limited thereto.
- the four through-holes 36 connected to one another with a dotted line form a quadrangle shape F2.
- FIGS. 5 to 8 are drawings illustrating drums in accordance with various embodiments of the present invention.
- protrusions 44 and through-holes 46 may be arranged in various schemes.
- protrusions 44 of rows L3 and L4 are provided to be in alignment with each other, and protrusions 44 of columns R3 and R4 are provided to be in alignment with each other.
- the protrusion 44 in one row is not disposed between the protrusions 44 in an other row such that the protrusions 44 in a zig-zag manner, different from FIG. 3 .
- a total of four through-holes 46 are arranged around a single protrusion 44, and the rows L3 and L4 are disposed in alignment with each other and the columns R3 and R4 are disposed in alignment with each other, so that only one through-hole 46 is located between one protrusion 44 and another protrusion 44. That is, the through-holes 46 are also arranged along the rows and columns of the protrusions 44.
- the through-holes 46 may be formed around a single protrusion 54, as illustrated by a dotted line forming a quadrangle shape F2.
- through-holes 56 are provided in a different arrangement than FIG. 5 .
- a protrusion 54 forming a first row L5 is located between protrusions 54 forming a second row L6 such that protrusion 54 of the first low L5 and the protrusion 54 of the second row L6 are provided in a zig-zag manner.
- the through-holes 56 may be located around the protrusion 54.
- a total of twelve through-holes 56 are located around a single protrusion 54.
- the through-holes 56, connected by a dashed line form an approximately hexagonal shape F3. That is, the through-holes 56 are arranged to surround the protrusion 54 in a hexagonal shape.
- the through-holes 56 are arranged in a uniform pattern, and when compared to other embodiments, may be provided in a larger number thereof, thereby preventing a spin dry water bottleneck phenomenon that occurs due to a small number of through-holes during a spin dry operation, and thus the spin dry efficiency is improved.
- a bubble bottle neck phenomenon occurring in a through-hole is improved, so that the time taken for bubbles to be introduced and the amount of bubbles introduced are improved.
- the through-holes are uniformly provided in a predetermined pattern, thereby preventing the washing extent of laundry from being varied depending on the position of the laundry.
- protrusions 64 are provided in alignment with one another. That is, the protrusions 64 are not provided in a zig-zag manner, different from the FIGS. 3 and 6 .
- Through-holes 66 are arranged to have a hexagonal shape around the protrusion 64.
- the through-hole 66 is provided as a burring hole that is formed through a burring process.
- a rim 68 that is, an outer rim 68 protrudes around the through-hole 66 toward the outer side of the drum 30.
- Rims 67 and 68 provided on the drum 30 include an inner rim 67 and the outer rim 68.
- the inner rim 67 has a diameter decreasing outwardly in the drum 30, and the outer rim 68 has a diameter increasing outwardly in the drum 30.
- the outer rim 68 is located more outward the drum 30 than the inner rim 67.
- a gap G between the most adjacent portions of the protrusions 64 may have a size of the diameter (d3) or larger and the diameter (d3) plus about 10mm or smaller.
- a cross section of a depression 69 may be determined in consideration of the diameter (d3) of the through-hole 66 that is increased due to the diameter d2, referred to as an inner diameter, during the burring process. Accordingly, when compared to a case without having a burring process, the gap G between the most adjacent portions of the protrusions 64 is increased.
- the laundry may be torn due to a cutting surface of the through-hole.
- a cutting surface may be formed outside the drum 30, thereby preventing the laundry from being damaged.
- FIG. 9 is a drawing illustrating a drum in accordance with an exemplary embodiment.
- a depression 77 may include a concave part 79 formed by recessing at least one portion thereof. That is, the concave part 79 is recessed from the inner side to the outer side of the drum 30.
- a through-hole 76 is provided at a portion of the concave part 79.
- the through-hole 76 may be provided at the center of the recess part 79.
- the through-hole 76 may be located at an outermost area of the drum 30, so that wash water is smoothly introduced and discharged due to a centrifugal force during rotation of the drum 30.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
Description
- The present invention relates to a washing machine, and more particularly, to a washing machine including a drum for enhancing the washing efficiency.
- Generally, washing machines are a pulsator type washing machine or a drum type washing machine depending on a washing method. Each of the pulsator type washing machine and the drum type washing machine includes a tub and a drum.
- However, in a case of the pulsator type washing machine, a rotary shaft of the drum where washing is performed may be provided to be perpendicular to the ground. A pulsator may be installed at a lower portion of the drum to generate water current. In a pulsator type washing machine, when the drum and the pulsator are rotated by a motor in a state in which laundry and detergent water are put into the drum, the pulsator stirs the laundry put into the drum together with wash water, thereby removing dirt from the laundry.
- In a case of the drum type washing machine, lifters may be disposed inside the drum to lift laundry upward.
- In both of the pulsator type washing machine and the drum type washing machine, the drum may be formed at a circumferential part thereof with through-holes that allow water of the tub to be introduced to the drum during a washing operation, and the water of the drum to be discharged during a drainage and spin dry operation.
- Conventionally, the through-holes are arranged on an inner surface of the drum, which is flat. Thus, the laundry does not easily encounter substantial friction with the inner surface of the drum, and thus resulting in a limitation to the washing efficiency.
- It is an aspect of the present invention to provide a washing machine having an improved structure of drum that is capable of enhancing the washing power of laundry while efficiently introducing and discharging wash water to, and from, the drum. Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
- In accordance with an aspect of the present invention, a washing machine includes a body, a tub, a drum, a driving apparatus, a plurality of protrusions, and at least one through-hole. The tub may be provided inside the body to store wash water therein.
- The drum may be rotatably provided at an inner side of the tub to accommodate laundry therein. The driving apparatus may be configured to rotate the drum. The plurality of protrusions may protrude inward from the drum. The protrusion may be formed by a plurality of polygons that may each have a polygonal shape. The at least one through-hole may be provided between adjacent protrusions among the plurality of protrusions to drain water.
- The protrusions may be spaced apart from one another.
- Each of the polygons may have a different angle with respect to a surface of the drum.
- The polygon may be a triangle having three sides.
- The plurality of triangles may gather at a center of the protrusion, to form a hexagonal shape.
- An outline of the protrusion may be a curved line such that the protrusion has an approximately circular shape.
- The plurality of through-holes may be formed at depressions that are provided more outwardly of the drum than the protrusion, that is to say further from the centre or central axis of the drum.
- The depression may be substantially flat.
- The depression may include a concave part formed by recessing at least one portion of the depression.
- An arrangement of the through-holes provided around the protrusion may have an approximately hexagonal shape.
- The plurality of protrusions may be provided in a plurality of rows and columns. In accordance with an aspect of the present invention, a washing machine includes a body, a tub, a drum, a driving apparatus, a plurality of protrusions and through-holes.
- The tub may be provided at an inside of the body to store wash water. The drum may be rotatably provided at an inner side of the tub to accommodate laundry therein. The driving apparatus may be configured to rotate the drum. The plurality of protrusions may protrude from the drum toward one side. The protrusion may be formed by a plurality of polygons that may be each provided on a different plane. The through-holes may be provided at an outermost area of the drum while being provided on a same plane.
- Each of the plurality of protrusions may have a predetermined pattern.
- The plurality of protrusions may be provided in a first row and a second row such that a protrusion forming the first row is disposed between protrusions forming the second row.
- Each of the plurality of through-holes may be provided between respective protrusions.
- Assuming that the through-hole has a diameter of d, a closest distance between the protrusions may be between d and d+10.
- Each of the plurality of polygons may be a triangle having three sides, the plurality of triangles may gather to form a hexagonal, and triangles may be disposed at a circumference of the hexagonal to form a single protrusion of the plurality of protrusions.
- A portion between the polygons may be rounded.
- An exemplary drum of the washing machine in accordance with the an embodiment of the present invention includes a protrusion having a plurality of polygons that generate frictional force between laundry and the drum, thereby increasing the washing power. The through-holes may be uniformly located around the protrusion, thereby preventing a spin dry water bottleneck phenomenon that occurs when water from spin dry is concentrated on a certain through-hole, and thus enhancing the spin dry efficiency.
- Additional aspects and/or advantages will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the invention.
- These and/or other aspects of the invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
-
FIG. 1 is a cross-sectional view illustrating a washing machine in accordance with an embodiment of the present invention. -
FIG. 2 illustrates an exemplary drum of a washing machine in accordance with an embodiment of the present invention. -
FIG. 3 is a drawing illustrating an exemplary drum in accordance with an embodiment. -
FIGs. 4A -4B are cross-sectional views illustrating an exemplary drum in accordance with an embodiment. -
FIGS. 5 to 7 are drawings illustrating drums in accordance with various embodiments. -
FIG. 8 is a cross-sectional view illustrating a drum in accordance with an embodiment. -
FIG. 9 is a drawing illustrating a drum in accordance with an embodiment. - Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below to explain the present invention by referring to the figures.
-
FIG. 1 is a cross-sectional view illustrating a washing machine in accordance with an embodiment of the present invention.FIG. 2 is an exploded perspective view of an exemplary drum of a washing machine in accordance with an embodiment of the present invention. - Referring to
FIGS. 1 and2 , awashing machine 1 includes abody 10 provided at a front side thereof with aninlet 11 through which laundry is put into, a tub 20 installed at an inside thebody 10 to store wash water, and adrum 30 rotatably provided at an inner side of the tub 20 to accommodate laundry. Thewashing machine 1 includes a door 122 to open and close theinlet 11 of thebody 10. - The tub 20 may be slantingly installed at a predetermined angle α with respect to an installation surface of the
washing machine 1 such that afront side part 20a in which an inlet thereof is formed is disposed to be higher than arear side part 20b of the tub 20. Thedrum 30 inside the tub 20 may be slantingly installed in the same way as the tub 20. However, the configurations of the tub 20 and thedrum 30 are not limited thereto, and therefore the tub 20 and/or thedrum 30 may be not slantingly installed. - The
drum 30 may be rotatably supported by a rotary shaft 13 that may be coupled to arear side part 30a of thedrum 30 while passing through therear side part 20b of the tub 20. A drivingmotor 14 may be installed at an outer side of therear side part 20b of the tub 20 to rotate the rotary shaft 13. As the drivingmotor 14 rotates the rotary shaft 13, thedrum 30 inside the tub 20 rotates. The drivingmotor 14 rotates thedrum 30 at a low speed during a washing operation, and may rotate thedrum 30 in one direction at a high speed during a spin dry operation. - At an upper side of the tub 20, a
detergent supply apparatus 15 may be provided to supply the inside of the tub 20 with detergent, and awater supply apparatus 16 may be provided to supply the inside of the tub 20 with wash water. Thedetergent supply device 15 may be installed adjacent to a front side of the body 20. Thewater supply apparatus 16 includes a firstwater supply pipe 16 connecting an external water supply pipe i6a to thedetergent supply apparatus 15, a secondwater supply pipe 16c connecting thedetergent supply apparatus 15 to the tub 20, and a watersupply control valve 16d installed on the first water supply pipe i6d to control supply of water. Such a configuration allows water to be supplied to the inside of the tub 20 via thedetergent supply apparatus 15 such that detergent is supplied to the tub 20 together with water. - A
heater 17 may be installed at a lower portion of the inside of the tub 20 to heat the wash water of the tub 20. To facilitate installation of theheater 17, aheater receiving part 20c may be provided at a lower portion of the tub 20 while protruding downward to receive theheater 17 while collecting wash water therein. - At a lower portion of an outer side of the tub 20, a drainage apparatus 40 may be installed to drain wash water of the tub 20, and a wash
water circulation apparatus 50 may be installed to supply wash water in the tub 20 to the inside of thedrum 30. The drainage apparatus 40 includes a first drain pipe 42 connecting to adrain port 41 formed at a lower portion of the tub 20, a drain pump 43 installed on the first drain pipe 42, and asecond drain pipe 44 connecting to an outlet of the drain pump 43. - The wash
water circulation apparatus 50 includes abypass valve 51 installed on thesecond drain pipe 44 at a side of the outlet of the drain pump 43, a washwater circulation pipe 52 extending from thebypass valve 51 to aninlet 31 of thedrum 30, and aspray nozzle 53 installed at an outlet of the washwater circulation pipe 52. Thebypass valve 51 converts a passage such that wash water of the outlet of the drain pump 43 is drained to the outside or flows toward the washwater circulation pipe 52. Thebypass valve 51 may be an electromotive three way valve. If the drain pump 43 is driven in a state in which thebypath valve 51 operates to allow wash water to flow toward the washwater circulation pipe 52, the wash water in the tub 20 may be sprayed to the inside of thedrum 30 through the first drain pipe 42 and the washwater circulation pipe 52. If the drain pump 43 is driven in a state in which thebypath valve 51 operates to allow wash water to flow toward thesecond drain pipe 44 that guides wash water to the outside, the wash water in the tub 20 may be drained. - The
drum 30 includes arear side part 30a that may be coupled to the rotary shaft 13, afront side part 30b having aninlet 31, and acircumference part 30c provided in a cylindrical shape and having both ends coupled to thefront side part 30b and therear side part 30a, respectively. A plurality oflifters 33 may be installed at an inner surface of thecircumference part 30c of thedrum 30 to lift and drops laundry inside thedrum 30 when thedrum 30 rotates. A plurality of stirringprotrusions 32 may be installed at an inner surface of therear side part 30a of thedrum 30 to improve the cleaning power. A plurality ofprotrusions 34 and a plurality of through-holes 36 are arranged on an inner surface of thedrum 30. -
FIG. 3 is a drawing illustrating an exemplary drum in accordance with an embodiment.FIGs. 4A and 4B illustrate exemplary cross sections of protrusions that are illustrated inFIG. 3 in accordance with an embodiment.FIG. 4A illustrates a cross-section along A-A' , andFIG. 4B illustrates a cross-section along B-B'. - Referring to
FIGS. 3 ,4A and 4B , the plurality ofprotrusions 34 may be provided at an inner side of thedrum 30, and the plurality of through-holes 36 may be provided around theprotrusions 34. As illustrated inFIGS. 4A and 4B , each of theprotrusions 34 may be provided to protrude from the outer side to the inner side of thedrum 30, but the present invention is not limited thereto. Theprotrusion 34 includes a plurality ofpolygons 35 having a polygonal shape. As illustrated in theFIG. 3 , thepolygons 35 each may have a triangular shape having three sides, but the present invention is not limited thereto. For example, theprotrusion 34 may be provided in any other polygonal shape. Thepolygons 35 may be disposed to have different angles with respect to a surface of thedrum 30. That is, each of thepolygons 35 may exist on a different plane. Accordingly, theprotrusion 34 may be formed by thepolygons 35 existing on respectively different planes. - As illustrated in the
FIG. 3 , for example, six triangles form a hexagonal pyramid F1, and eighteen triangles are formed around the hexagonal pyramid F1, forming asingle protrusion 34 including a total of twenty-four triangles . The hexagonal pyramid F1 located at the center of theprotrusion 34 may be referred to as afirst protrusion 34a, and protrusions, which are provided as triangles, around the hexagonal pyramid may be referred to assecond protrusions 34b. Thefirst protrusion 34a may protrude more inward thedrum 30 than thesecond protrusion 34b. - The
polygon 35 may be provided as a regular triangle, or an isosceles triangle. With respect to asingle protrusion 34, a maximum distance between a point P1 and a point P2 of theprotrusion 34 in a direction of a rotary shaft of thedrum 30 may be defined as Si, and a maximum distance between a point P3 and a point P4 of theprotrusion 34 in a circumferential direction of thedrum 30 may be defined as S2. In a case in which apolygon 35 is provided as a regular triangle, S1 is equal to S2. In a case in which apolygon 35 is provided as an isosceles triangle, S1 may have a size of half to two times a size of S2. In accordance with an embodiment of the present invention in which theprotrusion 34 is composed of twenty-four triangles, S2 may have a size four times a height of the triangle. When the number of triangles used exceeds twenty-four, S2 may be increased in units of multiplication by 2. For example, in a case in which theprotrusion 34 is composed of forty-eight triangles, S2 may have a size six times a height of the triangle. A depth of theprotrusion 34 formed on the surface of thedrum 30 may be defined as S3. In a case in which thepolygon 35 is a regular triangle, S1 and S2 each may have sizes five times to thirty times a size of S3. In a case in which thepolygon 35 is an isosceles triangle, a larger one of S1 and S2 may have a size five times to thirty times a size of S3. As an example, in a case in which S3 is 2mm, one of S1 and S2 may have a size within a range between 10mm to 60mm. - In a case in which the
polygon 35 is a triangle, asingle protrusion 34 may include a maximum number of polygons. Accordingly, the cleaning power may be increased while minimizing the damage of laundry that occurs as a result of the laundry coming into contact with the inner side of theprotrusion 34. However, thepolygon 35 is not limited to the triangle. Thepolygon 35 may be provided as a quadrangle, and a hexagon, for example. Sides of thepolygon 35 forming an outline of theprotrusion 34 may be provided in a curved line. Accordingly, theprotrusion 34 may have an approximately circular shape. A portion between thepolygons 35 forming theprotrusion 34 may be rounded. For example, a portion between thepolygons 35 may have a radius of curvature (r) of about 0.2r to 0.5r. Accordingly, the surface of thedrum 30 may be smoothly formed to prevent laundry from being damaged. - The
protrusions 34 may be spaced apart from each other. Theprotrusions 34 may have various arrangements. The plurality of through-holes 36 may be provided around theprotrusion 34. At least one through-hole 36 may be provided between theprotrusions 34. In accordance with an embodiment of the present invention, the through-hole 36 is illustrated as being provided in one unit thereof between theprotrusions 34, but the number of the through-holes 36 provided between theprotrusions 34 is not limited thereto. - The plurality of through-
holes 36 may be provided in adepression 37 that is provided further outward from thedrum 34 than theprotrusion 34. Thedepression 37 may be provided to be flat when thedrum 30 is extended ie. the surface of the drum is laid out flat. However, in a case in which thedrum 37 is rolled and bonded, thedepression 37 corresponds to a curved surface. - The through-
hole 36 may be provided in thedepression 37. Accordingly, the through-hole 36 may be located distant from the center of thedrum 30, so that wash water is efficiently introduced and discharged due to a centrifugal force. For example, when the through-hole 36 is provided in a piercing scheme, the through-hole 36 may have a diameter (see, for example, d1 inFIG. 4 ) of about 1.8mm to 3.5mm. A gap (see, for example, G inFIG. 3 ) between adjacent portions of theprotrusions 34 may have a size of the diameter (d1) of the through-hole 36 or larger and the diameter (d1) of the through-hole plus about 10mm or smaller. - The
protrusion 34 may have various arrangements. In accordance with an embodiment of the present invention, theprotrusion 34 may be provided in a plurality of rows L1 and L2 and a plurality of columns R1 and R2. A row located at an upper side (see, for example,FIG. 3 ) between the rows L1 andL2 forming protrusions 34 may be defined as a first row L1, and a row located at a lower side between the rows L1 and L2 may be defined as a second row L1. Theprotrusion 34 forming the second row L2 may be located between theprotrusions 34 forming the first low L1. That is, theprotrusion 34 forming the second row L2 may be arranged between theprotrusions 34 of the first row L1 such that theprotrusion 34 forming the first row L1 is provided in a zig-zag manner with theprotrusion 34 forming the second row L2. At least one through-hole 36 is provided between theprotrusions 34. As illustrated inFIG. 3 , for example, four through-holes 36 may be provided around asingle protrusion 34, but the number of the through-holes 36 around theprotrusion 34 is not limited thereto. As illustrated inFIG. 3 , the four through-holes 36 connected to one another with a dotted line form a quadrangle shape F2. -
FIGS. 5 to 8 are drawings illustrating drums in accordance with various embodiments of the present invention. - As illustrated in
FIGS. 5 to 8 ,protrusions 44 and through-holes 46 may be arranged in various schemes. - In accordance with an embodiment of the present invention as illustrated in
FIG. 5 ,protrusions 44 of rows L3 and L4 are provided to be in alignment with each other, andprotrusions 44 of columns R3 and R4 are provided to be in alignment with each other. - That is, the
protrusion 44 in one row is not disposed between theprotrusions 44 in an other row such that theprotrusions 44 in a zig-zag manner, different fromFIG. 3 . A total of four through-holes 46 are arranged around asingle protrusion 44, and the rows L3 and L4 are disposed in alignment with each other and the columns R3 and R4 are disposed in alignment with each other, so that only one through-hole 46 is located between oneprotrusion 44 and anotherprotrusion 44. That is, the through-holes 46 are also arranged along the rows and columns of theprotrusions 44. The through-holes 46 may be formed around asingle protrusion 54, as illustrated by a dotted line forming a quadrangle shape F2. - In an embodiment of the present invention illustrated in
FIG. 6 , through-holes 56 are provided in a different arrangement thanFIG. 5 . Aprotrusion 54 forming a first row L5 is located betweenprotrusions 54 forming a second row L6 such thatprotrusion 54 of the first low L5 and theprotrusion 54 of the second row L6 are provided in a zig-zag manner. The through-holes 56 may be located around theprotrusion 54. A total of twelve through-holes 56 are located around asingle protrusion 54. The through-holes 56, connected by a dashed line form an approximately hexagonal shape F3. That is, the through-holes 56 are arranged to surround theprotrusion 54 in a hexagonal shape. - The through-
holes 56 are arranged in a uniform pattern, and when compared to other embodiments, may be provided in a larger number thereof, thereby preventing a spin dry water bottleneck phenomenon that occurs due to a small number of through-holes during a spin dry operation, and thus the spin dry efficiency is improved. In addition, in a case of a product that washes laundry by use of bubbles, a bubble bottle neck phenomenon occurring in a through-hole is improved, so that the time taken for bubbles to be introduced and the amount of bubbles introduced are improved. In addition, the through-holes are uniformly provided in a predetermined pattern, thereby preventing the washing extent of laundry from being varied depending on the position of the laundry. - In an embodiment of the present invention illustrated in
FIGS. 7 and8 ,protrusions 64 are provided in alignment with one another. That is, theprotrusions 64 are not provided in a zig-zag manner, different from theFIGS. 3 and6 . Through-holes 66 are arranged to have a hexagonal shape around theprotrusion 64. - In accordance with an embodiment of the present invention, the through-
hole 66 is provided as a burring hole that is formed through a burring process. Through the burring processing, arim 68, that is, anouter rim 68 protrudes around the through-hole 66 toward the outer side of thedrum 30.Rims drum 30 include aninner rim 67 and theouter rim 68. Theinner rim 67 has a diameter decreasing outwardly in thedrum 30, and theouter rim 68 has a diameter increasing outwardly in thedrum 30. Theouter rim 68 is located more outward thedrum 30 than theinner rim 67. - When a diameter including the
rims hole 64 is determined as d3, a gap G between the most adjacent portions of theprotrusions 64 may have a size of the diameter (d3) or larger and the diameter (d3) plus about 10mm or smaller. In the burring process, a cross section of adepression 69 may be determined in consideration of the diameter (d3) of the through-hole 66 that is increased due to the diameter d2, referred to as an inner diameter, during the burring process. Accordingly, when compared to a case without having a burring process, the gap G between the most adjacent portions of theprotrusions 64 is increased. - In a case in which the burring process is not performed, the laundry may be torn due to a cutting surface of the through-hole. However, in a case in which the burring process is performed, a cutting surface may be formed outside the
drum 30, thereby preventing the laundry from being damaged. -
FIG. 9 is a drawing illustrating a drum in accordance with an exemplary embodiment. In accordance with an embodiment of the present invention, adepression 77 may include aconcave part 79 formed by recessing at least one portion thereof. That is, theconcave part 79 is recessed from the inner side to the outer side of thedrum 30. A through-hole 76 is provided at a portion of theconcave part 79. The through-hole 76 may be provided at the center of therecess part 79. The through-hole 76 may be located at an outermost area of thedrum 30, so that wash water is smoothly introduced and discharged due to a centrifugal force during rotation of thedrum 30. - Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles of the invention, the scope of which is defined in the claims.
Claims (14)
- A washing machine comprising:a drum to accommodate laundry therein;a driving apparatus to rotate the drum;a plurality of protrusions protruding inwards from the drum, each of the protrusions comprising a plurality of polygons; andat least one through-hole provided between adjacent protrusions to drain water.
- The washing machine of claim 1, wherein the protrusions are spaced apart from one another.
- The washing machine of claim 1 or 2, wherein each of the polygons has a different angle with respect to a surface of the drum.
- The washing machine of any one of the preceding claims, wherein each of the polygons is a triangle.
- The washing machine of claim 4, wherein a plurality of triangles at a centre of the protrusion form a hexagonal shape.
- The washing machine of any one of the preceding claims, wherein an outline of each of the protrusions is provided in a curved line such that the protrusion has an approximately circular shape.
- The washing machine of any one of the preceding claims, wherein the plurality of through-holes are formed at depressions that are provided further from the centre of the drum than the protrusions.
- The washing machine of claim 7, wherein the depressions are provided to be substantially flat.
- The washing machine of claim 7, wherein the depression includes a concave part formed by recessing at least one portion of the depression.
- The washing machine of any one of the preceding claims, wherein an arrangement of the through-holes provided around the protrusion has an approximately hexagonal shape.
- The washing machine of any one of the preceding claims, wherein the plurality of protrusions are provided in a first row and a second row such that a protrusion forming the first row is disposed between protrusions forming the second row.
- The washing machine of any one of the preceding claims, wherein when assuming that the through-hole has a diameter of d, a closest distance between the protrusions is between d and d+10.
- The washing machine of any one of the preceding claims, wherein each of the plurality of polygons is a triangle, the plurality of triangles form a hexagon and triangles are disposed at a circumference of the hexagonal to form a single protrusion.
- The washing machine of any one of the preceding claims, wherein a portion between the polygons is rounded.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120112649A KR101944366B1 (en) | 2012-10-10 | 2012-10-10 | Washing Machine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2719809A2 true EP2719809A2 (en) | 2014-04-16 |
EP2719809A3 EP2719809A3 (en) | 2015-08-05 |
EP2719809B1 EP2719809B1 (en) | 2017-03-15 |
Family
ID=49322259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP13187765.6A Active EP2719809B1 (en) | 2012-10-10 | 2013-10-08 | Washing machine |
Country Status (4)
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US (1) | US20140096570A1 (en) |
EP (1) | EP2719809B1 (en) |
KR (1) | KR101944366B1 (en) |
CN (1) | CN103820973B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106661795A (en) * | 2014-08-04 | 2017-05-10 | 海尔亚洲株式会社 | Drum washing machine |
Families Citing this family (7)
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WO2014058202A1 (en) * | 2012-10-10 | 2014-04-17 | Samsung Electronics Co., Ltd. | Washing machine |
KR102396321B1 (en) | 2016-07-12 | 2022-05-10 | 삼성전자주식회사 | Washing machine |
CN106637819A (en) * | 2016-10-19 | 2017-05-10 | 珠海格力电器股份有限公司 | Washing machine inner barrel and washing machine comprising same |
KR102367887B1 (en) * | 2017-06-08 | 2022-02-25 | 엘지전자 주식회사 | drum of the washing machine |
EP3412823B1 (en) * | 2017-06-08 | 2022-03-30 | LG Electronics Inc. | Drum of laundry machine |
CN111172692A (en) * | 2020-03-03 | 2020-05-19 | 无锡远诚机械有限公司 | Dyeing and washing integrated machine roller |
CN112478487A (en) * | 2020-11-04 | 2021-03-12 | 章鸿扬 | Automatic garbage classification box and classification method thereof |
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DE19603710A1 (en) * | 1996-02-02 | 1997-08-07 | Aeg Hausgeraete Gmbh | Washer dryer, for minimised noise during washing and spinning |
EP1118704B1 (en) * | 1996-11-02 | 2003-07-02 | Miele & Cie. GmbH & Co. | Drum washing machine |
JPH1190084A (en) * | 1997-07-25 | 1999-04-06 | Kazuo Nakada | Electronic washing machine |
DE10162918A1 (en) * | 2001-12-20 | 2003-07-03 | Bsh Bosch Siemens Hausgeraete | Drum for a laundry treatment machine |
DE102006062189B4 (en) * | 2006-12-22 | 2009-03-19 | Dr. Mirtsch Gmbh | Method for producing a structured material web for the passage of fluid media, structured material web and use thereof |
JP4620137B2 (en) * | 2008-03-12 | 2011-01-26 | 株式会社東芝 | Washing machine |
CN201546063U (en) * | 2009-10-15 | 2010-08-11 | 康佳集团股份有限公司 | Inner barrel structure of washing machine |
CZ2010341A3 (en) * | 2010-05-03 | 2011-03-16 | Primus Ce S.R.O. | Washing machine drum |
EP2390399B1 (en) * | 2010-05-31 | 2012-12-26 | Miele & Cie. KG | Drum for a washing machine |
JP5479277B2 (en) * | 2010-09-01 | 2014-04-23 | パナソニック株式会社 | Dehydrator |
CN201972010U (en) * | 2010-12-17 | 2011-09-14 | 苏州三星电子有限公司 | Inner barrel of washing machine |
EP2474659B1 (en) * | 2011-01-11 | 2013-01-09 | Miele & Cie. KG | Drum with curved structure for a washing machine |
-
2012
- 2012-10-10 KR KR1020120112649A patent/KR101944366B1/en active IP Right Grant
-
2013
- 2013-10-08 EP EP13187765.6A patent/EP2719809B1/en active Active
- 2013-10-09 US US14/049,598 patent/US20140096570A1/en not_active Abandoned
- 2013-10-10 CN CN201310753687.1A patent/CN103820973B/en active Active
Non-Patent Citations (1)
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106661795A (en) * | 2014-08-04 | 2017-05-10 | 海尔亚洲株式会社 | Drum washing machine |
EP3178981A4 (en) * | 2014-08-04 | 2018-03-28 | Haier Asia Co., Ltd | Drum washing machine |
CN106661795B (en) * | 2014-08-04 | 2019-01-08 | 海尔亚洲株式会社 | Roller washing machine |
Also Published As
Publication number | Publication date |
---|---|
EP2719809B1 (en) | 2017-03-15 |
US20140096570A1 (en) | 2014-04-10 |
EP2719809A3 (en) | 2015-08-05 |
CN103820973B (en) | 2018-02-09 |
KR20140046718A (en) | 2014-04-21 |
CN103820973A (en) | 2014-05-28 |
KR101944366B1 (en) | 2019-02-07 |
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