EP2363523B1 - Trommelschaufel für Waschmaschine - Google Patents

Trommelschaufel für Waschmaschine Download PDF

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Publication number
EP2363523B1
EP2363523B1 EP20110154202 EP11154202A EP2363523B1 EP 2363523 B1 EP2363523 B1 EP 2363523B1 EP 20110154202 EP20110154202 EP 20110154202 EP 11154202 A EP11154202 A EP 11154202A EP 2363523 B1 EP2363523 B1 EP 2363523B1
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EP
European Patent Office
Prior art keywords
drum
paddle
laundry
jacket surface
holes
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.)
Active
Application number
EP20110154202
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English (en)
French (fr)
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EP2363523A1 (de
Inventor
Mats Lilja
Anders SAHLÉN
Tobias Stralman
Patrik Jansson
Christine Johansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asko Appliances AB
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Asko Appliances AB
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Publication date
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Publication of EP2363523A1 publication Critical patent/EP2363523A1/de
Application granted granted Critical
Publication of EP2363523B1 publication Critical patent/EP2363523B1/de
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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
    • 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
    • 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

Definitions

  • the invention relates in general to a drum for a washing machine and in particular to the design of the paddles and drainage holes of the drum for ensuring efficient evacuation or removal of undesired particles and/or water from the drum at the same time.
  • Drums, or washing drums, designed for today's washing machines must preferably be designed so as to be able to ensure a good washing action, such that laundry is made clean, and efficient spin-drying, such that the drying of the laundry, after the latter has been washed, is quicker and more energy-efficient.
  • Washing machines can be divided into two main groups, the first group being agitator machines which are provided with an agitator or stirrer that is normally placed in the centre of the drum, in which case the agitator, during rotation, moves round and stirs the laundry in a usually vertical drum.
  • the second type of machine has a rotating drum whose rotation causes the laundry to be stirred and rinsed around in the washing water.
  • a drum with the features of the preamble is disclosed in WO 2005/071154 A1 .
  • the rotating drums are normally placed such that they have a horizontal rotation axis around which they rotate.
  • the inside of the jacket surface of the rotating drum is usually provided with a number of paddles placed equidistantly from one another. During washing, the drum rotates and the paddles help to lift the laundry slightly before its falls from the paddle, thus improving the stirring action compared to the situation if the drum was completely smooth.
  • the drum is also usually provided with perforations in the jacket surface, so-called drainage holes, through which washing and rinsing water can pass in and out. These holes also function for drainage of small particles that may have been present in the laundry when the latter was loaded into the drum. There is normally a requirement that these drainage holes must be relatively large in respect of the actual washing process, in order to achieve good drainage of water and particles and also good mixing of detergent with the water. In spin-drying, however, there is an opposite requirement as regards the size of the drainage holes, i.e. they must be relatively small in order to permit spin-drying that is as gentle as possible.
  • the invention relates to a washing drum that is designed to solve this problem, i.e. a washing drum that ensures efficient drainage and also ensures gentle spin-drying.
  • the invention thus relates to a drum, or washing drum, for a washing machine.
  • the drum comprises a jacket surface provided with drainage holes and at least one paddle.
  • These paddles are preferably placed rotationally symmetrically such that the drum, during rotation, is subjected to the lowest possible rolling forces.
  • a usual construction is for the paddle to extend parallel to the centre axis of the drum, i.e. along generatrices of the drum, and along almost the entire extent of the drum in the axial direction.
  • the paddle can also be shorter and/or slightly angled with respect to the centre axis of the drum.
  • the paddles can vary considerably in appearance.
  • the simplest type of paddle consists of a plate that protrudes from the inside face of the drum.
  • the paddles usually have more sophisticated shapes and can, for example, be substantially V-shaped (seen in a radial cross section of the drum) with two equilateral walls which are secured to the jacket surface of the drum and form the broad base and come together at a top which is usually slightly rounded in order to avoid too sharp an edge pulling too hard on the laundry.
  • the paddle can also be U-shaped with substantially perpendicular walls at its base on the jacket surface of the drum and a gently rounded top or can be of a shape that is a combination of a U-shape and the previously described variants of the V-shape.
  • the shape of the paddle can also resemble a sinus curve or can be of a type that has a more or less cuboid character with walls secured to the jacket surface and, between these, a more clearly defined "roof" which constitutes the top of the paddle at its distal end as seen from the jacket surface of the drum.
  • the shape of the paddle can also vary along its axial extent along the drum, and such variations will be described in more detail below.
  • the paddles can thus be configured in a number of different ways in order to perform their function of stirring the laundry.
  • a drum for a washing machine which drum comprises a jacket surface provided with drainage holes and at least one paddle, wherein the jacket surface is provided with at least one evacuation hole.
  • At least a part of the base of the paddle is wedge-shaped, concave or convex, such that particles are conveyed in the axial direction towards the at least one evacuation hole during rotation of the drum.
  • the evacuation hole is located in the jacket surface adjacent one of the short ends of the paddle. More preferable is to have an evacuation hole located adjacent each short end of the paddle. In this way the particles at the most have to be conveyed in the axial direction half the length of the paddle.
  • At least one of the short ends of the paddle adjacent the evacuation hole protrudes in the axial direction of the drum such that the protruding end is not in contact with the jacket surface.
  • the evacuation hole is covered by this protrusion and thus prevents laundry from being pushed/pressed directly on to the evacuation hole by the centrifugal force upon spin-drying.
  • the protruding end preferably has a flange extending in the radial direction away from the centre and towards the jacket surface of the drum. This flange also helps reducing the opening area created between the jacket surface and the protrusion in the tangential direction of the drum.
  • At least one of the paddles is provided with at least one evacuation hole.
  • the aim of such an evacuation hole is to ensure that coarse particles of dirt, for example grit or small stones, which cannot normally pass through the drainage holes of the washing drum, will be able to pass through the evacuation holes and in this way be evacuated from the drum during washing.
  • the evacuation hole or evacuation holes is/are normally positioned in the paddle near the base thereof on the jacket surface of the drum, such that the undesired particles that have ended up in the drum can easily be conveyed into the evacuation holes during washing.
  • the particles that are freed from the laundry gather in the lower part of the drum and rest against the jacket surface of the drum.
  • Drainage holes mean the holes which are formed in the jacket surface of the drum and which are open and are intended to be in contact with the laundry during washing. Therefore, drainage holes are not holes that lie hidden underneath or behind the paddle and are thus protected from direct contact with the laundry.
  • the evacuation holes are said to lie near the surface of the drum, this means that the holes are placed at most 2 cm from the jacket surface of the drum and more preferably less than 1 cm from the jacket surface of the drum.
  • a normally advantageous position of the evacuation hole is one in which it adjoins the jacket surface.
  • the area of the evacuation hole should be at least twice as great as the mean area of the drainage holes located in the jacket surface of the drum, and the size of the evacuation holes is often up to 3 times as great or even 4 times as great as the mean area of the drainage holes in the jacket surface.
  • the drainage holes in the jacket surface can vary in size and shape but are normally round holes with a diameter of between 2 and 4 mm.
  • the evacuation holes should be larger than the largest drainage holes in the jacket surface of the drum, and the evacuation holes are normally at least twice as large as the largest holes and in many cases at least 3 times as large.
  • the shape of the holes may also be of great importance. While the usual drainage holes in the washing drum are in most cases round, the shape of the evacuation holes can vary from oblong parallelepipeds to rectangular or round, semicircular or oval. In order to achieve good evacuation of different types of particles, it may be an advantage to provide the paddles with evacuation holes of different sizes and different shapes.
  • the evacuation holes should be at least 20 square millimetres, and in many cases it is preferable for them to be larger and the evacuation holes can be at least 30 square millimetres or even 40 square millimetres. As regards the maximum size, it should be small enough to minimize the risk of any laundry becoming stuck in the evacuation hole. In addition to its size, the shape of the hole and the configuration of its opening are also of importance as regards the risk of laundry becoming stuck in the hole. For machines designed for domestic use with great variation in the laundry in the form of different items of clothing and the like, the shape and size of the hole should be adopted such that, for example, buttons or other parts of an item of clothing cannot become stuck in the evacuation holes such that the clothes are torn mechanically by some of them getting caught in the hole. For these machines, the size of the evacuation hole is not normally greater than 1 square centimetre, in order to avoid damage to the laundry. The size of the evacuation holes is normally between 20 and 100 square millimetres, although there may be deviations from this range.
  • the paddle can vary in terms of its shape, and, by adapting the paddle according to the position of the evacuation holes, the evacuation of particles through these holes can be improved. Evacuation can be improved many times over if the angle between the side surface of the paddle, in which the evacuation hole is located, and the jacket surface of the drum is less than 135 degrees, preferably less than 120 degrees and most preferably less than 105 degrees.
  • the evacuation hole located in a wall or side surface of the paddle that is relatively vertical the particles located in the washing drum follow the paddle further than if the side surface of the paddle lies relatively flat along the jacket surface of the drum.
  • the base of the paddle where it bears against the jacket surface of the drum, can be designed such that particles are conveyed in the axial direction towards the evacuation hole during rotation of the drum.
  • the base could be outwardly wedge-shaped or convex in the middle part of the paddle in the longitudinal extent thereof (i.e. the paddle is provided, in its middle part, with an outward curve or wedge in the direction of rotation of the drum), which normally coincides with the axial direction of the drum, such that particles resting against the base of the paddle on the jacket surface of the drum are guided to each end of the paddle towards evacuation holes located relatively near the ends.
  • the base of the paddle such that it is wider at the ends of the paddle, in the longitudinal direction, than at its middle, with the effect that particles are conveyed in towards the middle where one or more evacuation holes are located.
  • the base has an undulating or sawtooth-shaped geometry, such that it bulges out and curves in with uniform (or non-uniform) spaces there between, and that evacuation holes are positioned in the inward curves to which particles are conveyed and can disappear through the evacuation holes.
  • Another possible configuration is one in which the base of the paddle has a contour narrowing in the longitudinal direction, such that the paddle, at its base, is narrower at one end of the drum than at the other end, and such that particles are conveyed towards evacuation holes placed at one end of the drum.
  • a method of further improving the properties of the washing drum can be achieved if the jacket surface of the drum comprises at least one axially limited first zone with drainage holes (3) primarily designed to ensure good drainage during washing (drainage zone), and also an axially limited second zone with drainage holes primarily designed to ensure support of the laundry during spin-drying (spin-drying zone).
  • the drum should be designed such that the laundry is initially guided towards the zone or zones of the drum that are designed for gentle spin-drying. In many cases when it is desirable to have gentle spin-drying, this entails laundry that is quite delicate and, consequently, in many instances such laundry is washed separately or in washes with relatively little detergent in the drum, such that the latter is not full.
  • the laundry can therefore be more or less guided to axially different zones of the drum.
  • Such guiding could, for example, take place if the centre axis of the drum slopes, such that the laundry is guided towards one of the two edges in the axial direction.
  • It is also possible to guide the laundry by having the jacket surface of the drum curved, for example by having the drum narrow slightly at the centre such that it has a smaller radius at its middle, in the axial direction, than at its axial ends, i.e. a contour resembling an hour-glass, which carries the laundry towards the ends in the axial direction.
  • the drum having a greater radius at its middle, in the axial direction, than at its axial ends, such that it has a barrel-shaped contour, and such that the laundry in such a drum is guided away from the ends of the "barrel" towards the middle of the barrel in the axial direction.
  • a further possibility is one in which the drum is slightly conical and has the shape of a truncated cone, such that its radius at one axial end is smaller than at its other axial end, and such that the laundry is thus guided during washing towards the end with the greater radius. It may also be possible to guide the laundry to different zones of the drum by means of the design of the paddles of the drum.
  • the side surface of the paddle can be shaped at its upper part or distal end, i.e.
  • the end of the side surface farthest away from the base on the jacket surface of the drum in such a way that it is concave, convex or wedge-shaped in the longitudinal direction, such that laundry is conveyed in the axial direction, during rotation of the drum, towards the zone of the drum in the axial direction that is designed for spin-drying the laundry. Therefore, at least the upper third of the side surface is preferably designed in this way, and in some cases the entire side surface, from its base to its distal end, can have such a configuration. It will be noted that the paddle does not need to have a special configuration of this kind along the entire longitudinal extent, and in many cases only part of the paddle in the longitudinal extent is designed in this way.
  • Another way of guiding the laundry towards the desired part of the drum in the axial direction can be if the angle between the side surface of the paddle and the jacket surface of the drum differs along the longitudinal extent of the paddle.
  • the ability of the laundry to follow the paddle during rotation differs along the longitudinal extent of the paddle.
  • the angle between the paddle is more or less a right angle, i.e. around 90 degrees or even below 90 degrees, the laundry is guided a relatively long distance.
  • the angle is greater than 90 degrees, for example from 105 degrees and upwards, the laundry will drop from the paddle at an earlier stage. As the laundry drops, laundry lying to the side of the laundry is able to move towards the space that has been emptied, and the laundry is thus guided to the desired part of the drum in the axial direction.
  • the movement of the laundry towards the space that has been emptied often occurs as a result of the fact that the laundry has been partially pressed together, and a spontaneous shifting of the laundry takes place in the direction towards the space that has been emptied when the laundry drops from the paddle.
  • the guiding of the laundry is especially of interest for the spin-drying phase of the wash cycle, and the drum is therefore intended to be designed such that the part of the paddle placed in the spin-drying zone or the spin-drying zones has, on average, a greater angle than the part of the paddle (5) placed in the drainage zone or drainage zones, which means that the laundry, during rotation of the drum, will drop earlier from those parts of the paddle located in the spin-drying zone, and the laundry is thus guided towards the spin-drying zone.
  • the above two principles concerning the design of the paddle for guiding the laundry can be combined, that is to say, on the one hand, the paddle has a different inclination in different parts of its longitudinal extent, such that the laundry drops earlier at those parts that are more angled, and, on the other hand, the paddle is concave, convex or wedge-shaped in the longitudinal extent, such that laundry is conveyed in the axial direction during rotation of the drum.
  • These features are preferably arranged such that they cooperate to guide the laundry towards the desired axial position, which is normally the zone of the drum where the laundry is to be located during spin-drying.
  • the drum comprises paddles provided with evacuation holes
  • these holes can advantageously be placed in the axially defined first zone (first type of zone) that is designed for good drainage (drainage zone).
  • the mean area of the drainage holes in the first zone, the drainage zone is greater than the mean area of the drainage holes in the second zone, the spin-drying zone.
  • the different zones can, for example, consist of round drainage holes, of the same size in each zone, in the jacket surface of the drum, and the holes in the spin-drying zone can, for example, have a diameter of between just below 2 mm and up to 4 mm, while the radius of the holes in the drainage zone is, for example, from ca. 3 mm up to ca. 5 mm.
  • Deviations can of course occur in the size of the holes, especially for washing machines designed for other areas of application.
  • the area of the holes (or, in the case of holes with different areas within each zone, the mean area of the holes in the zone) is preferably at least twice as great for the holes in the drainage zone as for the holes in the spin-drying zone.
  • a drum can therefore be designed such that at least the width of one of its paddles, at the distal end thereof, is narrower in the middle third of the longitudinal extent of the paddle than in the two outer thirds.
  • the paddle in its uppermost part that is to say the part of the paddle or side wall of the paddle farthest from its base, is designed such that, when normally placed in the drum with an extent in the longitudinal direction substantially parallel to the axial direction of the drum and along most of the length of the drum in the axial direction, is wider at its ends placed near the axial ends of the drum than at the axial middle of the drum, i.e. the distal part has a contour resembling an hour-glass.
  • such a contour in the upper, distal part of the paddle is combined with a contour in which the paddle, at its base, curves outwards at the middle in the longitudinal direction of the paddle and narrows at its ends.
  • the design of the paddle at its base and its design at different heights do not always need to be adapted to each other and can be designed independently of each other according to which functions it is desired to achieve.
  • the paddle is provided with evacuation holes, these can in this case be located at one or both of the outer thirds, such that, during rotation of the drum, particles and grit are carried outwards from the middle by the design of the paddle, whereas grit and particles at the distal ends of the drum are conveyed inwards by the shape of the jacket surface of the drum, and, in this way, the particles both from the ends and from the middle are conveyed towards the evacuation hole.
  • FIGS 1 and 2 show a drum 1 designed to be placed in a washing machine, in which it constitutes part of the boundary surface for the laundry that is intended to be washed in the washing machine.
  • the drum is shown with openings at both ends thereof in the axial direction. When mounted in a washing machine, one opening comes to be blocked off by a back piece, while the front end can normally be closed by a door in the front of the washing machine and is used to allow laundry to be loaded into and removed from the drum 1.
  • the drum 1, or wash drum as it can also be called, has a jacket surface 2 that is normally made of stainless metal but can also be made of other materials. As regards the concept of the invention, the choice of material for the drum 1 is not considered to be of particular importance.
  • the jacket surface 2 has been provided with a number of drainage holes 3, 4, which are intended to allow washing water and rinsing water to pass through the jacket surface 2 of the drum and in this way give a good washing and rinsing action.
  • Drums with drainage holes 3, 4 of the same size are presumably most common, but there are also variants with holes of different sizes, and, in the drum 1 shown here, there are two axially outer regions with larger drainage holes 3, and these holes are advantageous primarily on account of their ability to allow particles and water out of the drum 1, while the central region of the drum 1 is provided with smaller drainage holes 4, which means that the surface of the drum is less uneven or does not have such large depressions, thus providing better support during spin-drying of the laundry.
  • These different zones can, for example, function as what are here called spin-drying zones (the central zone with smaller holes) and drainage zones (the zones with larger drainage holes located on both sides of the spin-drying zone).
  • the drum is also provided with three paddles 5, of which only one is seen clearly in the figure, while the others can only be gleaned from the design of the outside of the lower part of the drum in Figure 1 , where the drum has been provided with outlet holes 12 under the paddle, and can be discerned in the upper left part of the figure.
  • the three paddles 5 are placed equidistantly around the jacket surface of the drum 1, such that the paddles 5 are placed rotationally symmetrically.
  • the longitudinal extents of the paddles 5 are parallel to the centre axis of the drum, although it is possible to imagine them having an extent that is at a slight angle with respect to the axial direction of the drum.
  • the paddle that is visible in Figure 1 is shown in an enlarged view in Figure 3 .
  • the evacuation holes 6 are located at the base 8 of the paddle, such that they adjoin the jacket surface 2.
  • the holes are rectangular, as can be seen more clearly from Figure 4 .
  • the latter also shows the general shape of the paddle which, at the base 8 thereof, is uniformly thick at the longitudinal ends but bulges out or is convex at the longitudinal middle part of the paddle, i.e. the central part in the axial direction of the drum.
  • At the upper part and distal end 9 of the paddle i.e.
  • the paddle 5 is uniformly thick at its longitudinal ends, while the longitudinal middle part curves inwards, and the upper part of the paddle 5 is thus reminiscent of the contour of an hour-glass.
  • most of the middle part or middle segment of the paddle 5 is designed with a surface having a shape similar to part of a ball or a sphere which, at the far bottom at the base 8, has been provided with an edge.
  • the aim of this design is, on the one hand, to provide a middle part of the side surface 7 of the paddle that slopes more than the outer parts of the paddle 5 relative to the jacket surface 2 of the drum and, in this way, ensure that the laundry rolls off the paddle 5 at an earlier stage during rotation of the drum 1, and the hollowing-out in the middle part of the drum 1 ensures that the laundry is more easily moved in towards the centre of the drum 1 and thus provides a movement of the laundry in the desired direction.
  • the laundry is thus guided to the middle part of the drum (the spin-drying zone) which, by virtue of its design with the relatively small drainage holes 4, is specially adapted for spin-drying the laundry.
  • the holes in the spin-drying zone are of uniform size and round, with a hole diameter of 2.2 mm, while the round and uniform holes in the outer drainage zones are 3.3 mm. It is of course possible to use other sizes or shapes of the holes in the different zones, and the holes also do not need to be the same size or the same shape within one zone.
  • the paddle 5 according to the first embodiment is shown in a view from above in Figure 4 .
  • the evacuation holes 6 can be seen more clearly here, and it can be seen that they have a rectangular shape.
  • a suitable size of the holes is that they are ca. 10 mm long and 5 mm high, i.e. have an area of ca. 50 square millimetres. This can be compared to the sizes of the drainage holes 3, 4 which measure ca. 7 and 10 square millimetres, respectively. In this case, therefore, the evacuation hole 6 is 5 times as large as the largest drainage holes 3.
  • the difference in size between the drainage holes 3, 4 and the evacuation hole 6 can vary considerably and is usually in the range of 2 to 10 times different.
  • FIG 5 shows the paddle 5 in a perspective view from below. It will be seen here how the evacuation hole 6 is connected via a channel 10 to an outlet 11, where the particles can be conveyed out of the drum 1.
  • the outlet 11 is adapted to fit into specially punched outlet holes 12 in the drum (see Figure 1 ), which are placed under the paddle 5.
  • the channel 10, the outlet 11 and the outlet hole 12 should be designed such that particles and the like that may pass through the evacuation hole 6 do not become stuck in any of them and instead can be conveyed out of the drum 1.
  • FIGs 6 , 7 and 8 correspond substantially to Figures 1 , 2 and 3 but show a paddle 5' according to a second embodiment of the invention.
  • the portion that in the first embodiment was placed in the middle of the drum 1 has been shifted towards one of the edges of the drum 1'.
  • the laundry is therefore moved to the site where the paddle 5' narrows at its distal end 8, which corresponds to a position, in the axial direction of the drum 1', nearer to one edge and has an axially delimited spin-drying zone all around the drum, which is provided with relatively small drainage holes 4 and functions as a good support surface for the laundry during spin-drying.
  • This spin-drying zone is preferably offset toward that end of the drum 1' nearest to the rear part of a washing machine when the drum is mounted in same.
  • the reason for this is that, for a front-load washing machine, the drum is usually suspended and supported in the rear part of the washing machine and, by guiding the laundry towards the rear part, the forces acting on the suspension during spin-drying are lower than if the laundry is placed farther forwards in the drum, i.e. nearer the part that is nearest the loading door.
  • Figure 9 shows a second type of evacuation hole 6' in the form of a semicircular hole in the paddle 5
  • Figure 10 shows a third type of evacuation hole 6" in the form of a triangular hole. It is therefore possible to use a number of different shapes and sizes of holes.
  • Figures 11 and 12 show a part of a drum designed to be placed in a washing machine.
  • the difference from previously described embodiments is that the evacuation holes 6 in this embodiment are placed at the short ends of the paddle 5.
  • the paddle has at both of its short ends protruding parts 12 that from a radial direction of the drum cover the evacuation holes 6.
  • the protruding parts 12 For guiding the particles or conveying the particles towards the evacuation holes 6, the protruding parts 12 have flanges 13 arranged underneath the protruding parts.
  • these flanges 13 make possible the placement of the evacuation holes 6 in a slightly protected location.
  • the flanges 13 further make a limitation for the size of particles being allowed to be conveyed towards the evacuation holes 6. Thus, small parts of the laundry will be prevented (or the risk will be at least minimized) from getting stuck in the evacuation holes 6.
  • each paddle is provided with 2 evacuation holes on each side of the paddle. It is obvious that the paddle can be provided with fewer or more holes if so desired, and that these can have different shapes. For example, one hole could be relatively narrow and one wide, and another hole more square or round, such that the holes can be adapted to allow particles of different shapes to pass through.
  • the paddle, in the lower part thereof can have a system more like bars, such that it resembles a comb which has gap-like openings along part or all of the lower part of the paddle, on the base thereof. Therefore, within the scope of the invention, there are a number of variants as regards the appearance of the evacuation holes.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Claims (14)

  1. Trommel (1) für eine Waschmaschine, welche Trommel (1) eine Mantelfläche (2), die mit Auslauflöchern (3, 4) versehen ist, um den Durchlauf von Waschwasser, Spülwasser und kleinen Partikeln zu ermöglichen, und zumindest eine Schaufel (5) für das Umrühren von Wäsche umfasst, wobei sich die Schaufel (5) im Allgemeinen entlang einer Mittelachse der Trommel (1) erstreckt,
    dadurch gekennzeichnet,
    dass die Mantelfläche mit zumindest einem Entleerungsloch (6) für das Entfernen von Partikeln versehen ist, die zu groß sind, um durch die Auslauflöcher durchzulaufen, wobei der Bereich des Entleerungslochs (6) zumindest zweimal so groß wie der Mittelbereich der Auslauflöcher (3, 4) ist, wobei das Entleerungsloch (6) angrenzend an zumindest ein kurzes Ende der Schaufel (5) in der Mantelfläche (2) angeordnet ist, und wobei zumindest ein Teil der Basis der Schaufel (5) im Mittelteil der Schaufel in der Längsausdehnung davon konvex ist, so dass an der Basis der Schaufel (5) anliegende Partikel während der Drehung der Trommel (1) in der axialen Richtung zu dem wenigstens einen Entleerungsloch (6) befördert werden.
  2. Trommel (1) nach Anspruch 1, wobei die zumindest eine Schaufel (5) mit zumindest einem Entleerungsloch (6) an der Basis der Schaufel (5) versehen ist.
  3. Trommel (1) nach Anspruch 1, wobei ein Entleerungsloch (6) angrenzend an jedes kurze Ende der Schaufel (5) angeordnet ist.
  4. Trommel (1) nach Anspruch 3, wobei zumindest eines der kurzen Enden der Schaufel (5) angrenzend an das Entleerungsloch (6) in der axialen Richtung der Trommel (1) hervorsteht, so dass das hervorstehende Ende (12) mit der Mantelfläche (2) nicht in Kontakt steht.
  5. Trommel (1) nach Anspruch 4, wobei das hervorstehende Ende (12) einen sich in der radialen Richtung weg von der Mitte und zur Mantelfläche (2) der Trommel (1) hin erstreckenden Flansch (13) aufweist, um Partikel dem Entleerungsloch (6) entlang der Mantelfläche (2) zuzuführen.
  6. Trommel (1) nach einem der vorgehenden Ansprüche, wobei der Bereich des Entleerungslochs (6) zumindest dreimal so groß wie der Mittelbereich der Auslauflöcher (3, 4) in der Mantelfläche (2) der Trommel (1), mehr bevorzugt viermal so groß, ist.
  7. Trommel (1) nach einem der vorgehenden Ansprüche, wobei der Bereich des Entleerungslochs (6) größer als das größte Auslaufloch (3) in der Mantelfläche (2) der Trommel und bevorzugt zumindest zweimal so groß wie der Bereich des größten Auslauflochs (3) ist.
  8. Trommel (1) nach einem der vorgehenden Ansprüche, wobei der Bereich des Entleerungslochs (6) zumindest 20 Quadratmillimeter, bevorzugt zumindest 30 Quadratmillimeter und am meisten bevorzugt zumindest 40 Quadratmillimeter beträgt.
  9. Trommel (1) nach Anspruch 2, wobei der Winkel zwischen der Seitenfläche (7) der Schaufel (5), in der das Entleerungsloch (6) angeordnet ist, und der Mantelfläche (2) der Trommel weniger als 135 Grad, bevorzugt weniger als 120 Grad, und am meisten bevorzugt weniger als 105 Grad beträgt.
  10. Trommel nach einem der vorgehenden Ansprüche, wobei die Mantelfläche (2) der Trommel zumindest eine axial begrenzte erste Zone mit Auslauflöchern (3), die hauptsächlich dazu ausgebildet sind, während des Waschens einen guten Auslauf sicherzustellen, und ebenfalls eine axial begrenzte zweite Zone mit Auslauflöchern (4) umfasst, die hauptsächlich dazu ausgebildet sind, die Unterstützung der Wäsche während des Trockenschleuderns sicherzustellen.
  11. Trommel (1) nach einem der vorgehenden Ansprüche, wobei die Seitenfläche (7) der Schaufel (5) am distalen Ende (9) davon konkav, konvex oder keilförmig ist, so dass die Wäsche in der axialen Richtung, während der Drehung der Trommel (1), zur Zone der Trommel in der axialen Richtung befördert wird, die für das Trockenschleudern der Wäsche ausgebildet ist.
  12. Trommel (1) nach Anspruch 11, wobei sich der Winkel zwischen der Seitenfläche (7) der Schaufel (5) und der Mantelfläche (2) der Trommel entlang der Längsausdehnung der Trommel unterscheidet, und dass der in der Trockenschleuder-Zone oder in den Trockenschleuder-Zonen untergebrachte Teil der Schaufel (5) im Durchschnitt einen größeren Winkel als der in der Auslaufzone oder den Auslaufzonen untergebrachte Teil der Trommel (5) aufweist.
  13. Trommel (1) nach einem der vorgehenden Ansprüche, wobei die Trommel (1) in einer Zone, die sich um die Trommel (1) herum im axial mittigen Teil der Trommel (1) erstreckt, hauptsächlich mit Auslauflöchern (4) ausgebildet ist, um die Unterstützung für ein sanftes Trockenschleudern der Wäsche sicherzustellen, und dass die Trommel (1) in einer Zone, die sich um die Trommel (1) in den axial äußeren Zonen zu jeder Seite der Mittelzone erstreckt, hauptsächlich mit Auslauflöchern (3) ausgebildet ist, um einen guten Auslauf der Trommel während des Waschens sicherzustellen.
  14. Trommel (1) nach einem der vorhergehenden Ansprüche, wobei die Durchschnittsbreite der Schaufel (5) an der Basis (8) davon im mittleren Drittel der Länge der Schaufel (5), in der Längsrichtung, weiter als in den beiden äußeren Dritteln ist.
EP20110154202 2010-02-12 2011-02-11 Trommelschaufel für Waschmaschine Active EP2363523B1 (de)

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RU222899U1 (ru) * 2023-11-02 2024-01-23 Федеральное государственное бюджетное образовательное учреждение высшего образования "Пензенский государственный технологический университет" Барабан стиральной машины

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JP2020175168A (ja) * 2018-12-18 2020-10-29 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． ドラム式洗濯機
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CN114717817A (zh) * 2021-11-01 2022-07-08 无锡小天鹅电器有限公司 衣物处理装置的内筒及衣物处理装置

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US11898292B2 (en) 2018-12-18 2024-02-13 Samsung Electronics Co., Ltd. Washing machine
RU222899U1 (ru) * 2023-11-02 2024-01-23 Федеральное государственное бюджетное образовательное учреждение высшего образования "Пензенский государственный технологический университет" Барабан стиральной машины

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DK2363524T3 (da) 2013-09-02
EP2363524B1 (de) 2013-06-19
EP2363524A1 (de) 2011-09-07
EP2363523A1 (de) 2011-09-07

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