BE1029833B1 - Machine for washing and/or drying laundry and drum of such a machine - Google Patents

Abstract

The invention relates to a machine (1) for washing and/or drying laundry (2), comprising a drum (4) rotatably mounted about an axis of rotation (3) for receiving the laundry (2), the drum (4) at its inner lateral surface (5) has at least one driver (6) which is raised like ribs, the driver (6) has a bottom surface (7) connected to the inner lateral surface (5) of the drum (4), from which a sliding surface (8) extends into the interior of the drum (4), which merges into a peak (9) on the inside of the drum, with two flanks (10, 11) being formed on the side of the driver (6) opposite the sliding surface (8) which are related to the peak (9) form an undercut (12).

Description

Description

Machine for washing and/or drying laundry and drum of such

machine

The invention relates to a machine for washing and/or drying laundry and a

drum of such a machine.

Machines designed for washing and/or drying laundry of those concerned

Art have a drum mounted rotatably about an axis of rotation for receiving the laundry, the drum having at least one rib-like raised driver on its inner surface.

The machine described in DE 10 2014 204 520 B4 is for example for

Running laundry drying, so it is a tumble dryer.

This has a drum which is rotatably mounted about an axis of rotation. Along the

The inner lateral surface of the drum has several raised ribs

Arranged drivers that run parallel and at an acute angle to the cylinder axis in this example. Any of the existing and made of thermoplastic material

The driver is arranged on an associated flat plate of the inner lateral surface of the drum and is freely pivotable in an associated joint about a pivot axis directed perpendicularly to the inner lateral surface. By rotating the drum around her

Axis of rotation, the laundry is taken along by the drivers, which run the described rotation about the pivot axis, resulting in a stochastic

Mixing of the laundry should lead. As a result, the warm drying air flows through the laundry in an improved manner. This solution offers many advantages, but its structure is expensive and complex, so that the mounting effort for the drivers is also considerable.

Another example of a tumble dryer is described in DE 20 35 825 A. In this case, the drum rotates about its axis of rotation in opposite directions to one another

Directions and has along its inner surface on several parallel to the axis of rotation driver. The drivers, designed in the form of ribs, have an inclined surface parallel to the axis, on which several conveyor plates are arranged, which under one

Conveying angle run to the longitudinal axis. In this solution, two variants are described as special configurations, according to which the conveying plates are designed to be rigid or can be retracted into the drivers. This design is also complex in terms of manufacturing technology and is therefore disadvantageous.

Finally, using the example of a washing machine, EP 0 245 721 B1 shows a drum which is mounted rotatably about its axis of rotation and has numerous dosing reservoirs designed to hold washing liquid along its inner lateral surface.

This metering are designed rib-like raised and run parallel to the axis

Axis of rotation of the drum. The special feature here is that the

Metering memory when rotating the drum in the lower part of the drum initially

Take up the washing liquid and release it onto the laundry that has fallen down as the rotary movement continues. For this purpose, the dosing reservoirs, which also serve as carriers for the laundry, have trough-like depressions on both sides.

A problem has been found that in the previously known machines

Washing and/or drying laundry, the laundry is carried along by the existing carriers when the drum rotates about its axis of rotation only up to a small drop height. As a result, the laundry comes into less contact with the wash water or the drying air than is desired. Both the

The washing process as well as the drying therefore need to be improved. This also requires an optimization of the drum present in such a machine.

Overall, such a machine, like the drum, should be easier to manufacture than previously known designs.

The invention therefore addresses the problem of providing a drum and a machine for washing and/or drying laundry whose structure is compared to known ones

Solutions is much simplified and used during the rotation of the drum around their

Axis of rotation a greater height of fall of the laundry and thus an improvement

Mixing of the laundry allows.

According to the invention, this problem is solved by a washing machine and/or

Drying laundry and a drum for such a machine with the

Features of the independent claims 1 and 13 solved.

Advantageous refinements and developments of the invention result from the following dependent claims.

A machine for washing and/or drying laundry, comprising one by one

The drum, which is rotatably mounted on the axis of rotation, for receiving the laundry, with the drum having at least one rib-like raised driver on its inner lateral surface, was developed according to the invention such that the driver has a bottom surface connected to the inner lateral surface of the drum, from which a sliding surface extends into the interior extends into the drum, which merges into an apex on the inside of the drum, wherein on the side of the

Driver two flanks are formed, which form an undercut with respect to the apex.

The solution according to the invention impresses with its simple structure and its very effective

Improvement of the thorough mixing and the transport height of the laundry to be washed and/or dried. The carriers present on the inner lateral surface of the drum have a sliding surface along which the laundry can slide in a first direction of rotation and, after passing the carrier, is conveyed into the interior of the drum. In the opposite, second direction of rotation, which is also considered preferred

Direction of rotation or main direction of rotation can be considered, each driver has two

Flanks, of which a first flank forms a recessed surface section with respect to this main direction of rotation, which extends radially inward into an in

Main direction of rotation protruding, second surface portion passes, the second

flank forms. The consequence of this is that the resulting undercut of the

Driver the laundry is transported by the driver up to a greater fall height than was previously the case, so that there is an overall improvement

Mixing of the laundry comes. This allows the laundry to come into contact with the warm, dry air or the washing water for longer, so that the

Drying or washing results can be optimized. The inventive

However, the solution also offers the advantage that the energy consumption of such a machine for washing and/or drying laundry can be reduced overall and can be shorter

Washing and drying times apply.

According to a first embodiment of the invention, the undercut is formed in that the flanks, starting from a parting line running coaxially to the axis of rotation, are aligned opposite to one another in a spreading manner. through the

Separating line, an opposite, opening course direction of the flanks is defined, which, in the sense of the invention, leads to an improvement in the entrainment of the laundry when the drum rotates in the corresponding direction.

Accordingly, it can be stated that the flanks have a course that is radially opposite to one another. If one follows the course of the flank, which extends from the bottom surface of the driver into the interior of the drum, it has a projecting or recessed course, while the second flank following the dividing line has a course that is opposite to this according to the invention.

Overall, it should be noted that the driver in the sense of the invention by the

Undercut has a shovel-like contour, leading to the effect described

Improving the entrainment of the laundry and thus increasing the fall height.

A further measure of the invention can also be seen in the fact that each

Flank has a flat, concave or convex geometry. On the one hand, this means that both flanks can have the same geometry. On the other hand, however, the flanks can differ in their geometry. It is thus possible, for example, for the first flank, starting from the bottom surface, to have a concave geometry in cross-section and for the adjoining, second flank to have a convex geometry

has geometry. Likewise, both flanks can be concave or convex

Have geometry or be executed. Furthermore, one of the flanks can also be flat and the other can be equipped with a curved surface. As a result, the shovel-like shape of the drivers can be reinforced or improved overall.

If one looks at the side of the driver opposite the flanks, then there is the sliding surface, which is also of decisive importance for the transport of the laundry within the drum. According to a very advantageous embodiment of the

Invention, it is proposed that the sliding surface as a whole be flat or arcuate

has surface. In particular, the curved design of the sliding surface facilitates the discharge of the laundry into the interior of the drum, since it is guided along the sliding surface without resistance, i.e. “slidingly”.

However, according to a further development of the invention, the movement of the laundry within the drum can be increased in that the arc-shaped sliding surface has a convex or concave cross-sectional geometry. A convex or outwardly curved geometry promotes a

Gliding movement of the laundry, while the concave shape of the sliding surface is more apt to hurl the laundry away from the sliding surface as the drum rotates.

In order to be able to optimally attach the carrier to the inner surface of the drum, it is also advantageous if the bottom surface of the carrier has a geometry that is adapted to the inner surface of the drum. Adaptation to the

Inner surface of the drum also means that the laundry is not under the

Driver can be jammed.

It is possible to permanently connect the driver to the inner surface of the drum. A further, very advantageous embodiment of the invention, however, is that the driver is releasably connected to the inner lateral surface. This variant allows, for example, a replacement of damaged or worn drivers. For example, a screw connection or a locking or snap-in connection can be used as a detachable connection. For example, it is possible to provide mushroom-shaped pegs on the bottom surface of the driver, which are snapped into corresponding recesses in the inner lateral surface of the drum.

If the driver is made from a thermoplastic material, then it is very easy to produce in terms of manufacturing technology and is also light in weight.

In particular, the low weight has proven to be advantageous for the uniformity of the

rotation of the drum exposed.

In order to avoid damage to the laundry during washing or drying, it also represents a significant advantage of the invention when the

Transition geometries between the individual surfaces of the driver are rounded or broken edges. In particular, the transition geometries between the

Sliding surface and the crest as well as between the crest and the inner drum flank. Overall, however, it can be said that rounded transitions on

Drivers reduce the wear of the laundry significantly and are therefore advantageous.

The machine according to the invention for washing and/or drying laundry is, in a particularly preferred manner, a washing machine

Washer dryer or tumble dryer.

The inventive drum of a machine for washing and / or drying

Laundry is characterized in that designed to receive the laundry

Drum on its inner surface at least one rib-like raised running

Has driver, which is connected to the inner surface of the drum

Has bottom surface, starting from a sliding surface in the interior of the

Extends into the drum, which merges into an apex on the inside of the drum, with two flanks being formed on the side of the driver opposite the sliding surface, which form an undercut with respect to the apex.

With regard to the design of the driver, the above statements also apply to the design of the drum as such.

The invention is explained in more detail below with reference to the accompanying drawings. The exemplary embodiment shown does not represent any restriction to the variant shown, but only serves to explain a principle of the invention.

Identical or similar components are always denoted by the same reference numbers. In order to be able to illustrate the mode of operation according to the invention, the figures only show greatly simplified basic representations, in which the components which are not essential for the invention have been omitted. However, this does not mean that such components are not present in a solution according to the invention.

It shows:

FIG. 1: a perspective view of a machine for washing and/or drying laundry,

FIG. 2: an exemplary view of the interior of a machine for washing and/or drying laundry,

Figure 3: a drum as a single part in a perspective view looking into the

interior of the drum,

FIG. 4 shows a greatly simplified sectional view according to section IV-IV

figure 2 of a drum,

FIG. 5: a driver for use in a drum of a machine for washing and/or drying laundry as a separate individual part in a first perspective view and

FIG. 6: a carrier for use in a drum of a machine for washing and/or drying laundry as a separate individual part in a further perspective view.

The machine 1 shown in FIG. 1 for washing and/or drying laundry has a generally known basic structure. It initially consists of a housing 14 with a front side 15, which in turn has various operating elements 18 and a display 19

In the form of a display, which are required to operate the machine 1.

On the front side 15 there is also a loading opening 16 which is formed by a

Joint 29 pivoting door 17 can be closed. The laundry to be washed and/or dried can be introduced into the interior of a drum 4 via the loading opening 16 . The drum 4 has along its inner lateral surface 5 several rib-like raised drivers 6, the course of which is approximately coaxial to the

Axis of rotation 3 of the drum 4 is aligned. The view through the open door 17 of

Machine 1 in Figure 1 also allows a view of the rear, rear end wall 20 of

Drum 4. The drum 4 is, apart from the drivers 6, a conventional drum 4, which means that it has a structure and/or openings for the entry of

Water or the inflow of drying air.

Based on the representation of Figure 2 below is the basic structure of a

Machine 1 for washing and/or drying laundry 2 will be explained. As already in

Was carried out in connection with the description of FIG. 1, the machine 1 shown in FIG. 2 has a drum 4 which can be rotated about an axis of rotation 3 in the

Housing 14 is mounted. The drum 4 has a rear end wall 20, which in the example shown unspecified openings for the passage of

has drying air. Within the drum 4, the existing laundry 2 is whirled around by its rotational movement, so that the existing, warm

Drying air can optimally flow through the laundry 2 and thus dry it. Along the

Inner lateral surface 5 of the drum 4 are arranged several drivers 6, the

Improve the turbulence of the laundry 2 are used. The construction and functioning of these drivers 6 is explained in more detail below in connection with the description of FIGS. 3-6. The loading opening 16 already described above, which is closed by the door 17 here, is used for filling in or for removing the laundry 2 . The

Loading opening 16 is located in the front end wall 21 of the drum 4 and also penetrates part of the housing 14 in the area of the front side 15 of the machine 1.

An electronic control device 28 is provided for controlling the individual processes and units within the machine 1, which is indicated only schematically in the illustration in FIG. Room air is first sucked in by the machine 1 by means of a blower 27 driven by a drive motor 25 and transported within a fluid line system of the machine 1 . The drive motor 25 is used at the same time to drive the drum 4. To transmit the rotary movement from

Drive motor 25 to the drum 4 is used in a conventional manner with the

Drive motor 25 coupled belt 30. The sucked air happens first

Heating element 22, which heats the air to the required operating temperature. In the

The heated air then passes through an air duct 23 and is introduced into the interior of the drum 4, where it completes the drying process. The moist air is then discharged from the drum 4 and passed through a condensation element 26, by means of which the water contained in the air is separated. In addition, the machine 1 has a condensate collection tank 24.

Figure 3 shows a drum 4 as an item in a perspective view looking into the interior of the drum 4. The drum 4 is designed in the example shown as a circular-cylindrical body, which has a rear end wall 20 with openings for the

Air inlet or the supply of water in the interior of the drum 4 has. The rear end wall 20 opposite a ring-shaped, front end wall 21 can be seen, which forms a loading opening 16, which in the

Machine 1 used drum 4 can be closed by the door 17 previously described. Along the inner surface 5 of the drum 4 are several

Arranged driver 6, which are designed rib-like raised and their

Longitudinal extension coaxial to the axis of rotation 3 of the drum 4 runs. The special feature of the drivers 6 used here is that, starting from a bottom surface 7 matching the inner lateral surface 5 of the drum 4, they transition into a sliding surface 8, the shape of which is convex, so that when the drum 4 rotates counter to the

Clockwise laundry can slide along this sliding surface 8 and is thrown into the interior of the drum 4 . The sliding surface 8 is radially inward in a

Apex 9, which is not pointed in the present case, but also designed as a surface. Between the apex 9 and the bottom surface 7 of the driver 6 there are also two flanks 10 and 11 which run in opposite directions to one another and are divided by a dividing line 13 and thus merge into one another. The flanks 10 and 11 form an undercut 12 compared to the crown surface 9. If the drum 4 is rotated clockwise, however, the laundry 2 can be conveyed to a higher level with a driver 6 designed in this way than with previously known ones

was the case. This results in the advantage of better turbulence and

Thorough mixing of the laundry 2, which is subsequently penetrated in an improved manner by the drying air flowing into the drum 4, which entails an accelerated drying process in an energy-saving manner. However, the driver 6 designed according to the invention also has a positive effect with regard to the washing result, since the improved turbulence of the laundry 2 within the drum 4 means that the laundry 2 is optimally wetted with the washing water.

FIG. 4 shows a greatly simplified sectional view according to section IV-

IV from Figure 2 a drum 4 out. In this representation it can be seen that the

Laundry 2 upon rotation of the drum 4 in the direction of the arrow by the as a result of

Undercut 12 shovel-like flanks 10 and 11 of the driver 6 detected and taken over a greater distance than was previously possible. In the example shown in FIG. 4, the inner lateral surface 5 of the drum 4 has a total of two drivers arranged opposite one another.

Finally, FIGS. 5 and 6 each show a driver 6 as is used in a drum 4 of a machine 1 for washing and/or drying laundry 2 .

The driver 6 shown in FIGS. 5 and 6 is shown as a separate individual part in two different, perspective views. As can be seen from FIGS. 5 and 6, the driver 6 has a sliding surface 8 with a convex shape, which, starting from a bottom surface 7, extends radially inward of the drum 4 and radially on the inside merges into a crest 9 designed as a surface . Related to

At the apex 9, the flanks 11 and 10 adjoining in the direction of the bottom surface 7 form an undercut 12. The flanks 11 and 10 are separated from one another by a dividing line 13. In the illustrated embodiment, the flanks 10 and 11 have an arcuate course. All of the existing surfaces merge into one another so that the transitions are rounded or the edges are broken in order to prevent damage to the laundry sliding along the driver 6 . In other words, sharp-edged transitions are avoided in the driver 6 .

LIST OF REFERENCE SYMBOLS: 1 machine 2 laundry 3 axis of rotation 4 drum 5 inner lateral surface 6 driver 7 bottom surface 8 sliding surface 9 vertex 10 flank 11 flank 12 undercut 13 dividing line 14 housing 15 front side 16 loading opening 17 door 18 operating elements 19 display 20 rear end wall 21 front end wall 22 Heating element 23 Air duct 24 Condensate collection tank 25 Drive motor 26 Condensing element 27 Fan 28 Electronic control device 29 Joint 30 Belt

Claims (13)

patent claims 1. Machine (1) for washing and/or drying laundry (2), comprising a drum (4) rotatably mounted about an axis of rotation (3) for receiving the laundry (2), the drum (4) on its inner lateral surface ( 5) has at least one driver (6) raised in the manner of ribs, characterized in that the driver (6) has a bottom surface (7) connected to the inner lateral surface (5) of the drum (4), from which a sliding surface (8) into the interior of the drum (4), which merges into an apex (9) on the inside of the drum, with two flanks (10, 11) being formed on the side of the driver (6) opposite the sliding surface (8), which with reference to the apex (9) form an undercut (12). 2. Machine according to claim 1, characterized in that the undercut (12) is formed in that the flanks (10, 11), starting from a coaxial to the axis of rotation (3) running parting line (13), opposite to each other, in a spreading way, are aligned. 3. Machine according to one of the preceding claims, characterized in that the flanks (10, 11) have a course radially opposite to one another. 4. Machine according to one of the preceding claims, characterized in that the driver (6) has a shovel-like contour due to the undercut (12). 5. Machine according to one of the preceding claims, characterized in that each flank (10, 11) has a planar, concave or convex geometry. 6. Machine according to one of the preceding claims, characterized in that the sliding surface (8) has an overall flat or arcuate surface. 7. Machine according to claim 6, characterized in that the arc-shaped sliding surface (8) has a convex or concave geometry. 8. Machine according to one of the preceding claims, characterized in that the bottom surface (7) of the driver (6) has a geometry which is adapted to the inner lateral surface (5) of the drum (4). 9. Machine according to one of the preceding claims, characterized in that the driver (6) is detachably connected to the inner lateral surface (5). 10. Machine according to one of the preceding claims, characterized in that the driver (6) consists of a thermoplastic material. 11. Machine according to one of the preceding claims, characterized in that the transition geometries between the surfaces of the driver (6) are rounded or broken edges. 12. Machine according to one of the preceding claims, characterized in that the machine is a washing machine, a washer-dryer or a tumble dryer. 13. drum of a machine (1) for washing and / or drying laundry (2) according to any one of the preceding claims, characterized in that for receiving the laundry (2) running drum (4) on its inner lateral surface (5) at least has a rib-like raised driver (6) which has a bottom surface (7) connected to the inner lateral surface (5) of the drum (4), from which a sliding surface (8) extends into the interior of the drum (4), which merges into an apex (9) on the inside of the drum, with two flanks (10, 11) being formed on the side of the driver (6) opposite the sliding surface (8), which form an undercut (12) in relation to the apex (9). .