CZ2010341A3 - Washing machine drum - Google Patents

Abstract

The belt (2) of the drum (1) is provided with pulse-shaped recesses (3) punched from the outside of the drum inwardly, wherein the recesses (3) are arranged in rows parallel to the drum axis (1), wherein the orientation of the recess (3) with each the series changes by 180 degC, giving rise to the left seams (4) and right seams (5), with one increment less in each other row. In rows with a smaller number of embossments, these embossments are arranged at the gap level between the two embossments in the adjacent row.

Description

Washing machine drum

Technical field

The invention relates to a washing drum, in particular to its peripheral surface.

BACKGROUND OF THE INVENTION

For better mixing of the laundry during washing, the peripheral surface of the drum is provided with various openings and other modifications.

WO 03 054-275 discloses a performance of a washing drum consisting of spherical indentations pushed into the inner side of the drum in rows along the circumference of the drum, mutually offset by the radius of the indentation so as to cover the drum as perfectly as possible. Six holes for water inlet and outlet are located around each recess, symmetrically along the perimeter.

WO 98 20j195 discloses a performance of a washing drum consisting of composite hexagons dome-pushed into the inside of the drum. The space between them is in several places supplemented with holes for water inlet and outlet.

WO 03 054276 discloses a washing drum similar to the above. Cylindrical surface of the drum; as well as its forehead, it is formed by dome-shaped embossments towards the inside of the drum. The plan shape of these indentations is circular, of different diameters and distributed over the entire surface of the drum.

EP 1 293 594 discloses a washing machine drum with perforations formed by notches in the form of a rounded honeycomb structure formed into the outer surface of the drum.

DE 197 31 666 discloses a washer or dryer drum which is undulating all over its surface, which results in both an increase in stability and a reduction in the weight of the drum.

DE 44 45 669 discloses a washing machine drum formed by indentations for reducing the moisture content of a laundry, between which a plurality of water inlets are located.

GB 2 268 939 discloses an embodiment of a washing drum comprising air pockets for picking up water in the bottom of the washing machine and for pouring it in higher positions.

It is an object of the present invention to provide a new type of drum provided with a treatment which ensures a sufficiently gentle washing of the laundry and effective distribution of water during the washing.

SUMMARY OF THE INVENTION

The aforementioned drawbacks of existing types of washing drums are largely eliminated by the drum of the washing machine according to the invention, characterized in that the drum belt has crescent-shaped indentations pushed inwardly from the outside of the drum, the indentations being arranged in rows parallel to the drum axis. the punches change by 180 ° with each row, resulting in left punches and right punches, with one punch less in each other row, with rows with fewer punches. series.

In a preferred embodiment, the left indentation row comprises four indentations, while the right indentation row comprises three indentations.

In a further preferred embodiment, the deepest embossing of the embossments is at the location of the crescent arc of the embossments, and at the location of the half-moon embossments of the embossments, it passes smoothly into the surface of the drum belt.

In a further preferred embodiment, in the space between the recesses, the strip is additionally punched through openings located in rows parallel to the drum axis to allow water inlet and outlet.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be further illustrated by the drawings in which: Fig. 1 is an expanded peripheral strip of a scrubbing drum with depressions shown; Fig. 2 is a schematic view of the drum in vertical section; on the drum shell.

y

An example of an embodiment of the invention

It is evident that there is a crescent-shaped indentation 3 pushed from the outside of the drum inwards to a depth of, for example, 2 mm, the deepest indentation being at the location of the crescent arc of the indentations 3, This is best seen in FIG. 3. At the crescent point of the indentations 3, it passes continuously to the surface of the belt 2 of the drum 1. The indentations 3 are arranged in rows parallel to the axis of the drum 1. The orientation of the indentations 3 varies by 180 ° with each row. This results in left indentations 4 and right indentations 5, depending on whether the crescent curvature is oriented left or right. In the exemplary embodiment, it can be seen that the left indentation row 4 comprises four indentations, while the right indentation row has three indentations. It will be appreciated that this adjustment may also be effected such that the left-hand moldings 4 three and the right-hand moldings 5 four. However, other combinations are also conceivable.

The drum itself has an inside diameter of 620 mm. In addition, in the space between the recesses 3, the belt is perforated by apertures 6 located in rows parallel to the axis of the drum to allow water inlet and outlet, for example eighteen and nineteen. This number alternates with each row. Here again, other combinations can be imagined.

The surface of the drum 7 also comprises three rows of five openings 7 in the direction of the drum axis serving to take up water into the three ribs (not shown) in the interior of the drum 1. The two outer rows of half-holes are joined into one after folding the washing drum. During washing, the water is then poured out of the holes in the ribs and the laundry is showered, which is not shown in the figures. The ribs are attached to the drum shell y by means of rectangular holes 8 in the drum 7 into which the rib tongues engage.

It has been verified that the shape of the indentation reduces the possibility of laundry damage due to sharper edges of the indentations in the previous techniques, without compromising the quality of mixing, and vice versa, improves work load uniformity, makes washing more efficient and thus makes it more economical.

Claims (4)

A washing machine drum, characterized in that the belt (2) of the drum (1) is provided with crescent-shaped indentations (3) pushed inwardly from the outside of the drum, the indentations (3) being arranged in rows parallel to the drum axis (1), wherein the orientation of the indentations (3) varies by 180 ° with each row, resulting in left indentations (4) and right indentations (5), alternately one indentation in each second row, with less rows by the number of punches, these punches are arranged at the level of the gap between two punches in the adjacent row. Washing drum according to claim 1, characterized in that the deepest indentations of the indentations (3) are at the location of the crescent arc of the indentations (3) and, at the crescent point of the indentations (3), pass smoothly into the belt (2) of the drum (1). ). Washing machine drum according to claim 1, characterized in that the left-hand row (4) comprises four indentations, while the right-hand row (5) comprises three indentations. Washing machine drum according to claim 1, characterized in that in the space between the indentations (3), the belt (2) of the drum (1) is punched through holes (6) located in parallel rows with the axis of the drum (1).