KR20020093274A - drum of drum-type washing machine - Google Patents

Abstract

PURPOSE: A washing drum of a drum type washing machine is provided to improve the washing efficiency by inducing active friction between embossing and the clothing by forming the embossing on an inner surfacer of the washing drum and a lifter. CONSTITUTION: A washing drum of a drum type washing machine includes an embossing part formed on an inner surface with a plurality of embossings(22a-22e,23a-23e) with respect to dehydrating holes(29) by a predetermined interval for guiding water toward the dehydrating holes along the protruded surfaces of the embossings, and the respective embossings are protruded radially inwardly from the washing drum for inducing active friction between clothing and the inner surface of the drum.

Description

Drum of drum-type washing machine

The present invention relates to a drum washing machine, and more particularly, to improve the manufacturing and strength of the washing drum rotatably installed inside the tub of the drum washing machine, the drum washing machine to improve the washing performance and dehydration performance It is about the washing drum.

In general, a drum washing machine is a device that allows washing to be performed by using a rotating drum and a friction force of the laundry by receiving the driving force of the driving unit while detergent, washing water, and laundry are put into the washing drum. This is not tangled well, so the pounding and rubbing can make a laundry effect.

1 is a vertical side cross-sectional view of a washing drum employed in a general drum washing machine, and FIG. 2 is a view illustrating a vertical cross-sectional structure of the washing drum shown in FIG. 1 from the rear. FIG. The structure and operation of the washing drum are as follows.

Inside the outer case 100 is a tub (10, tub) in the lying down state, that is, the axial direction of the tub 10 and the bottom surface of the installation space in which the washing machine is installed is installed in parallel, the tub 10 Inside the cylindrical washing drum 20 is installed coaxially with the tub 10 to be rotatable by receiving the driving force of the drive unit 30.

In addition, a plurality of dehydration holes 29 are provided in the washing drum 20, and a plurality of lifters 40 extending in an axial direction corresponding to the axial length of the washing drum 20 are provided on an inner surface thereof. .

Washing drum 20 of the conventional drum washing machine having the above-described configuration, when the washing drum 20 is rotated by the driving force transmitted by the operation of the drive unit 30, the laundry and washing water put into the washing drum By the action of the lifter 60 in accordance with the rotation of the 20 rises upwards to a predetermined height along the inner surface of the laundry drum 20 and falls down, while repeating this process laundry and laundry drum 20 Friction occurs between the inner surface and the lifter 60, and washing is performed by the friction and the action of the detergent.

However, the laundry drum 20 of the conventional drum washing machine has the following problems.

First, the washing and rinsing administration of the washing drum 20 of the conventional drum washing machine and the lifter 40 protruding surface 41 do not have an uneven surface that can generate active friction with the laundry. When the washing drum 20 and the lifter 40 and the laundry does not occur enough friction there was a limit to improve the washing performance.

Second, in the conventional laundry drum 20, after the dehydration stroke is completed by the centrifugal force generated during the dehydration stroke, the laundry sticks to the state in which the laundry is in close contact with the inner surface of the washing drum 20. There was a problem that is inconvenient to withdraw.

Third, looking at the manufacturing process of the general washing drum 20, after forming a plurality of dehydration holes 29 on the rectangular metal plate, the metal plate formed with the dehydration holes 29 is bent into a hollow cylindrical shape and then edges at both ends It is produced by combining by a bonding method such as welding or curling (curling) processing.

In this case, an irregular processing surface due to the joining process is generated in the connecting portion 25 (see FIG. 2) where the joining by welding or curling processing is performed. Since the processing surface may damage laundry, the processing surface is evenly surfaced. There was a problem that the work process increases due to the treatment and the production cost increases accordingly.

The present invention has been made to solve the above problems, the object of the present invention by improving the structure of the laundry drum and lifter to maximize the friction between the laundry drum and the laundry to improve the washing performance and dehydration performance It is also intended to improve.

In addition, by inducing spacing between the contact surface of the laundry and the laundry drum during dehydration, the laundry is strongly adhered to the inner surface of the laundry drum, thereby reducing the phenomenon of sticking.

In addition, to improve the strength and productivity of the washing drum.

1 is a vertical side cross-sectional view of a washing drum employed in a general drum washing machine,

Figure 2 is a view of the vertical cross-sectional structure of the laundry drum shown in Figure 1 seen from the rear,

Figure 3 is a partially cutaway perspective view showing the washing drum structure of the drum washing machine according to an embodiment of the present invention,

4 is a cross-sectional view taken along line II of FIG. 3;

5 is a cross-sectional view taken along the line II-II of FIG. 3;

6 is a cross-sectional view taken along line III-III of FIG. 3;

* Description of the symbols for the main parts of the drawings *

10 ... tub, 20 ... laundry drum,

21 .... the first embossing part, 22 .... the second embossing part,

23 ... 3rd embossing part, 25 ... connection part,

29 ... dehydrating, 40 ... lifter.

In order to achieve the above object, according to the present invention, a drum washing machine having a tub installed inside the outer case forming the appearance of the washing machine, and a washing drum rotatably installed in the tub and a plurality of dehydration holes perforated on the wall surface thereof. In the washing drum, the inner surface of the washing drum is provided with an embossing portion formed with a plurality of embossing at regular intervals adjacent to the dehydration hole, each embossing so as to project convexly toward the radially inner side of the washing drum. Washing drum of the drum washing machine characterized in that it is provided.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

In the following description, the same elements among the main components of the drum washing machine drum according to the present invention will be given the same reference numbers with reference to the above-described prior art according to Figs. 1 and 2, and the detailed description thereof will be omitted.

Figure 3 is a partially cutaway perspective view showing the washing drum structure of the drum washing machine according to an embodiment of the present invention.

As shown in the figure, a plurality of dehydration holes 29 are formed on the laundry drum 20 at regular intervals, and a plurality of embossings 21a to 21e and 22a on the adjacent side of the dehydration holes 29 are formed. To 22d, 23a to 23e are formed at regular intervals.

At this time, each of the embossing (21a to 21e, 22a to 22d, 23a to 23e) can be integrally formed on the laundry drum 20 by plastic working, such as press working, the embossing is active with the laundry In order to induce friction, it is preferable to protrude convexly toward the radially inner side of the washing drum 20.

In addition, the shape of each of the embossing can be formed in a substantially hemispherical (半球) structure, it can be formed in a variety of different shapes in consideration of the friction with the laundry.

In addition, each of the embossing is preferably formed on the outer side adjacent to the dehydration hole 29 so that the washing water can be easily guided to the dehydration hole 29 side along the protruding surface of the embossing during the dehydration administration.

On the other hand, each of the embossing is formed by varying its size along the axial or circumferential direction of the laundry drum 20, thereby inducing active friction between the laundry and the inner surface of the laundry drum 20, this is Figure 3 4 to be described in more detail as follows.

FIG. 4 is a cross-sectional view taken along the line I-I of FIG. 3 to show the first embossing portion, FIG. 5 is a cross-sectional view taken along the line II-II of FIG. 3, and FIG. 6 is a cross-sectional view taken along the line III-III of FIG. 3. An embossing part is shown.

As shown in the figure, a plurality of embossing (21a to 21e, 22a to 22d, 23a to 23e) on the washing drum 20 is formed at regular intervals along the axial and circumferential direction of the washing drum 20 An embossing portion is formed.

That is, the embossing portion is the first embossing portion 21 which gradually decreases the size of the embossing (21a to 21e) toward the rear portion 20b from the front portion 20a of the washing drum 20 having an opening, As the size of the embossing 23a to 23e gradually increases from the front portion 20a of the washing drum 20 to the rear portion 20b, the front and rear portions 20a and 20b of the washing drum 20 are formed. Each embossing 22a to 22d is composed of a second embossing portion 22 having a constant size.

In addition, the first embossing part 21 and the third embossing part 23 are alternately formed along the circumferential direction of the washing drum 20, and the first embossing part 21 and the third embossing part 23 are formed. The second embossing portion 22 is formed therebetween.

On the other hand, the manufacturing process of the laundry drum 20 by installing a lifter 40 on the connection portion 25 formed along one side of the laundry drum 20 along the axial direction to cover the connection portion 25 by the lifter 40. Can be simplified.

That is, when the connecting part 25 is joined by welding or curling process during the manufacture of the washing drum 20, thermal deformation by welding or local plastic deformation due to the curling process is caused on the machining surface around the connecting part 25. In this case, the separate surface processing process can be omitted by installing and covering the lifter 40 without the need for a separate surface processing such as a trimming process on the processing surface in which the deformation is generated.

And, on the lifter 40, it is preferable to form a plurality of embossing 45 in the hemispherical shape so as to protrude convexly toward the radially inner side of the washing drum 20, which is in contact with the laundry and the embossing 45 In order to improve the washing performance by inducing friction with the laundry more actively by the embossing (45).

In addition, by forming a hole (45a) in the central portion of each of the embossing (45) it is possible to further improve the washing performance by allowing the flow of the wash water in accordance with the rotation of the washing drum (20).

Referring to the effect of the washing drum drum washing machine according to an embodiment of the present invention made of the above-described configuration as follows.

First, when the user puts the laundry to be washed into the washing drum 20 after the washing stroke and the rinsing stroke, and operates the washing machine, the washing water is supplied and power is supplied to the driving unit 30 when the washing water is supplied. The driving unit 30 is applied to the forward and reverse rotation, and the washing drum 20 is the forward and reverse rotation by the forward and reverse rotation of the driving unit 30.

At this time, while the washing drum 20 is rotated, the washing water and the laundry are lifted up to a predetermined height by the lifter 40 and then dropped to the lower side, and the laundry is repeated inside the laundry drum 20 while repeating this process. Will flow in the direction.

As such, the laundry flows in various directions so that the laundry embosses the laundry in contact with the embossings on the inner surface of the laundry drum 20, thereby further increasing the washing and rinsing performance of the laundry.

On the other hand, when explaining the effect of the dehydration administration as follows.

In the conventional case, laundry is adhered to the inner side of the washing drum 20 by the centrifugal force due to the strong rotation of the washing drum 20 during dehydration, and according to the present invention, the centrifugal force due to the strong rotation of the washing drum 20 is Even when acting on the laundry, the embossing formed on the laundry drum 20 may induce spacing between the laundry and the inner surface of the laundry drum 20, thereby minimizing an area in close contact with the laundry and the inner surface of the laundry drum 20.

Therefore, the laundry can be easily separated by minimizing the phenomenon that the laundry sticks to the inner surface of the laundry drum 20 after dehydration is completed.

4 to 6 indicate the discharge state of the washing water discharged through the dehydration hole 29 when dewatering. As shown in the drawing, the arrow is shown adjacent to the dehydration hole 29. By forming the embossed on the outer side, the washing water is easily guided toward the dehydration hole 29 along the protruding surface of the embossing during the dehydration operation, so that the washing water is easily discharged.

On the other hand, as the plurality of embossing 45 is formed on the lifter 40 to protrude toward the radially inner side of the laundry drum 20 to increase the frictional force with the laundry to improve the washing performance.

In addition, the inflow and outflow of the washing water is possible through the hole 45a formed in the embossing 45, and when the washing drum 20 is rotated, the inside of the lifter 40 is introduced through the hole 45a. As the washing water falls into the washing drum 20, the washing performance may be further improved by the frictional force caused by the falling of the washing water.

In addition, by forming a plurality of embossing on the washing drum 20, compared with the conventional washing drum formed of the same thickness, it is possible to further improve the strength of the washing drum 20 itself.

Then, by installing the lifter 40 on the connecting portion 25 of the washing drum 20, by covering the lifter 40 to cover the processing surface on the connecting portion 25 without the need for a separate surface processing such as trimming process, The surface processing process of can be omitted.

On the other hand, the embodiment of the present invention as described above is configured to help the understanding of the present invention is not limited only to the above-described embodiment, various modifications are possible within the scope without departing from the spirit of the present invention.

As described in detail above, the present invention has the following effects.

First, by forming a plurality of embossing on the washing drum inner surface and the lifter, it is possible to improve the washing performance by inducing active friction between the embossing and the laundry.

Second, by inducing the occurrence of gaps between the laundry that has been dewatered and the contact surface of the laundry drum, the effect of making the laundry easily separated by reducing the phenomenon that the laundry strongly adheres to the laundry drum after the dehydration is completed. There is.

Third, there is an effect to improve the strength of the washing drum by forming a plurality of embossing on the washing drum.

Fourth, the separate surface processing process can be omitted by installing a lifter to cover the processing surface on the connecting part of the washing drum without the need for trimming, etc., thereby simplifying the manufacturing process of the washing drum. There is.

Claims (5)

In a drum washing machine having a tub installed inside the outer case forming the appearance of the washing machine, and a washing drum rotatably installed in the tub and a plurality of dehydration holes perforated on the wall thereof, The inner surface of the washing drum is provided with an embossing portion formed at a predetermined interval on the adjacent side around the dehydration hole, each embossing is formed to protrude convexly toward the radially inner side of the washing drum. Washing drums for drum washing machines. The method of claim 1, The embossing portion has a first embossing portion whose size gradually decreases from the front portion of the washing drum having an opening toward the rear portion thereof, and a third embossing portion having an enlarged size of the embossing portion gradually from the front portion of the washing drum toward the rear portion thereof. And an embossing portion having a constant embossing size of the front and rear portions, wherein the first embossing portion and the third embossing portion are alternately formed along the circumferential direction of the washing drum, and between the first and third embossing portions. Drum washing machine drum washing machine characterized in that the embossing portion is formed. The method according to claim 1 or 2, Each of the embossing drum is washing drum, characterized in that formed in a hemispherical shape. The method of claim 1, The laundry drum is coupled to both ends of the corner connecting portion facing each other by bending a hollow cylindrical cylindrical metal plate formed of a plurality of dehydration holes and embossing integrally by a coupling means, by installing a lifter on the connection portion Washing drum of the drum washing machine, characterized in that the connecting portion is not exposed to the inner surface side of the washing drum. The method of claim 4, wherein On the lifter is provided with a plurality of embossing protruding convexly toward the radially inner side of the washing drum, each of the embossing drum washing drum, characterized in that the hole is provided to allow the inflow and outflow of the wash water.