EP2758582B1 - Laundry drum having a drum profile for optimized spin-drying action - Google Patents
Laundry drum having a drum profile for optimized spin-drying action Download PDFInfo
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- EP2758582B1 EP2758582B1 EP12753511.0A EP12753511A EP2758582B1 EP 2758582 B1 EP2758582 B1 EP 2758582B1 EP 12753511 A EP12753511 A EP 12753511A EP 2758582 B1 EP2758582 B1 EP 2758582B1
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- drum
- structures
- laundry
- axis
- shell
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- 230000009471 action Effects 0.000 title description 2
- 238000001035 drying Methods 0.000 title 1
- 239000013598 vector Substances 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 10
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- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 2
- 238000010981 drying operation Methods 0.000 claims 1
- 238000009987 spinning Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
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- 230000018109 developmental process Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
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- 230000001788 irregular Effects 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Images
Classifications
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- 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
Definitions
- the invention relates to a laundry drum for a laundry treatment machine with a drum shell having circumferentially distributed structures which rise in the radial direction with respect to a rotational axis of the laundry drum with a structure height, the jacket being spaced from the drum axis and a washing ring, in particular is formed in a spin operation of the drum in the laundry treating machine, has a thickness (see FIG. 1 ).
- the invention includes a domestic appliance with the laundry drum according to the invention, wherein the domestic appliance is in particular a washing machine or a washer-dryer.
- a laundry drum for a laundry treating machine which also has distributed structures in the circumferential direction of the drum shell.
- the structures present there are linear. They have elevations, which may extend parallel to the circumferential direction, but may also have different distances from each other.
- the structuring chosen there an advantageous, mechanical laundry treatment with a favorable drainage effect is accompanied. Since the structuring also favors the rigidity of the drum, the use of materials can be kept low. In operation, the drum thus formed was able to convince by a very low-vibration run.
- the structures used in the prior art described above would actually have to be called smaller-scale structures. They point only small elevations of, for example, a height of up to 2.5 mm. These structures are usually tuned to the position of drainage holes in the drum shell so that when spinning parts of the laundry do not get caught with the drainage holes, which could lead to damage of laundry items. The height of the structures is far below the thickness of a Wäscheringes the drum shell, which forms on the drum shell.
- a laundry ring the z. B. When spinning laundry. B. at the end of a washing process, when using a spin speed above a contact speed, arises, essentially - when looking at its cross-sectional shape - form an annular.
- the object of the invention is to get even better results in terms of dewatering in a spin process when spinning laundry or laundry items. In this case, not a further increased spin speed should be sought, but it should be considered the possibilities of a different laundry drum to be trained.
- the invention relates to a laundry drum according to claim 1 and a household appliance according to claim 16.
- a Wäschering As far as in the description of the invention, a Wäschering is mentioned, this is a Wäschering meant with thickness D, which forms at full load or almost at full load according to the operating instructions of the laundry treatment machine at usual laundry.
- the thickness of the scrubbing ring can be determined in test series at rated load in accordance with DIN EN 60456 and at 50% of the maximum final speed, provided that this speed is at least twice as large as an application speed of the drum, in which the laundry in the drum just completely on the drum shell has created.
- the preferred structures used in the invention can be further systematized.
- the cross-sectional profile of the structures along the drum axis A is equal or at least nearly equal.
- this is a one-dimensional structure.
- This one-dimensional structure can be determined by a vector in the sense of mathematics, which works with vectors. An impression created when viewing the interior of such a drum is as if prisms distributed over the circumference are present.
- a drum shell with a one-dimensional structure is unwound over its circumferential length of 2 ⁇ R, then, given a parting of t1 to 2 ⁇ R / t1, a structure height and a structure depth are present.
- the cross-sectional profile of the structures for each cutting plane perpendicular to the drum axis A which is infinitesimally spaced from another, is rotated at least an infinitesimal rotation about the drum axis.
- this is a case of a two-dimensional structure. An impression that may arise when looking at the interior of such a drum is that, as if distributed over the circumference, there would be an impression, as would be provided by a helical gear.
- the structures used in the drum according to the invention are coarse-grained compared with the structures of the conventional type. In particular, they are six-parted (cf. Fig. 1 ). They can also be multi-part in another way. Overall, therefore, the structures are coarse, such as 3 to 30 parts (t1). This forms a roughly textured drum shell.
- the coarse-grained structures have four parts ( Fig. 4 ), seven-part ( Fig. 3 ) or twelve-part ( Fig. 2 ) are.
- the structure elevations are directed substantially inward toward the drum axis A and have a feature height H that is at least 5% and at most 40% of the distance R from the drum axis A.
- the inclination angle I of the structures is 5 ° to 38 °, preferably 10 ° to 20 °.
- a structure or a structural element according to the invention includes an element whose height exceeds at least 5% of the drum radius or 10 mm.
- the inclination angle I shall be based on a minimum value of 5 °. Even if, as stated, an occupancy of the drum shell with 25% of structures or structural elements is sufficient, it is still preferable that a coverage of the drum shell of almost 100% is desired.
- the surface portions formed by depths of the structures at a distance R from the drum axis should be at least 5% of the total area of the drum shell ,
- the structures are symmetrically formed with respect to a hypothetical line S running from their highest elevation to the drum axis A.
- an asymmetric structure is present, wherein a control of a laundry treatment process is executable so that the driver function of a conventional laundry driver is also accepted.
- a control of a laundry treatment process is executable so that the driver function of a conventional laundry driver is also accepted.
- structures other than this asymmetric structure it will usually be assumed that, in particular three, drivers are to be used. Deviating teaches the DE 10 2006 041 431 A1 in that in the presence of structures which are similar to the structures according to the invention, no drivers are to be used.
- the angle of inclination I of the structures, measured against the radius vector can be equal at almost every point of the drum shell, when so-called logarithmic spirals are used to form the structures.
- at least one segment of the structures may all be similar to a logarithmic spiral, that is, within that segment of the structures, the angle of inclination I, measured against the radius vector, is equal to almost every point of the drum shell.
- the structures preferably have drainage holes at their lowest point.
- first structures taught in the circumferential direction of the drum shell over a circumferential length 2 ⁇ R are to be completed by second structures in the axial direction of the drum shell over a length d, so that a two-dimensionally structured drum shell is present.
- the design principle holds that these structures should also be coarse.
- a t1-division and the second structures for a t-2-division are to be defined.
- every single structure is similar.
- t1 is 3 to 30 and the parting t2 is 3 to 30, preferably 2 to 20.
- irregular structures can be recommended in individual cases. It is possible that regular structures are altered by technical means, such as a random number generator. In this case, it may be preferable for the first structures and the second structures, which have an initially regular structure per se, to be able to be finally formed by a random generator. When automated character or plotting to design such pattern is then interposed at a suitable location of the plotter device of the named random number generator.
- first and second structures are formed in the form of periodic or amorphous patterns.
- the structure elevations are directed substantially inward towards the drum axis and should provide a structural height H which is at least 5% and at most 40% of the distance R from the drum axis A, wherein it is necessary to form at least 25% of the drum shell with structures.
- the in the Fig. 1 shown structure 1 of the respective structured drum shell 2 can be considered on the one hand in the actual manufacturing process of the drum T, which is based on metalworking. Then the structure is created by embossing or bending. On the other hand, it is possible to maintain the round cross-sectional shape of the drum, so the cylindrical shell 3, as this is usual on, in the original state and an installation of correspondingly shaped structure-individual elements (see. Fig. 6 ), as is also the case with the known laundry drivers in the interior of the drum to make. With such shaped elements, the structure 1 of the FIGS. 1 to 4 can be simulated very well with displayed segments.
- FIG. 1 is a schematic cross-sectional view of a drum shell 2 of a drum T of a laundry treating machine having six symmetrically constructed structures 1, wherein a structure is hatched.
- Each structure 1 consists of two - actually hypothetical - segments 1 a and 1 b, which is preferably symmetrical with respect to a radial, hypothetical connecting line S from the top of the highest elevation to the axis center A of the laundry drum. That is, a segment (1a, 1b) is defined by the intersections of the radius vector passing through the drum axis (A) and the cross section of a structure (1) having the greatest and least distance from the drum axis (A). Each segment has a partial course 2a and 2b of the structured drum shell 2 assigned to it.
- Fig. 2 is a schematic cross-sectional view of a drum shell with twelve symmetrically constructed structures 1 'shown.
- Each structure or structural cell exists as in Fig. 1 of two segments 1a 'and 1b' which extends symmetrically with respect to a radial hypothetical connecting line S from the top of the highest elevation to the axis center A of the laundry drum. So there are 24 segments 1 a 'and 1 b' before.
- the structure is preferably a value of 1.8 to 2.4 cm, in particular 2.1 cm and for the angle of inclination I', which is characterized by cutting a present or any, concentric with the axis center line extending arc with the structure profile results, preferably a value of 15 ° to 25 °, in particular 20 ° is selected.
- the circular arc line 3 which in this case connects the tips of the coarse-particulate structures according to the invention, can according to Fig. 2 formed cross-sectional area for the washing and spinning process to about 89% to 93% are used. This is cheaper than at Fig. 1 , Also, the volume utilization is about 91% in Relative to a conventional drum with smaller-sized structures also cheaper than at Fig. 1 ,
- Fig. 3 is a schematic cross-sectional view of a drum shell with seven, not symmetrical structure, possessing structural cells 1 "shown for the inclination angle I", which results for the gradually increasing structure over a concentric to the center axis extending, determined by the radius R, arcuate line is preferred a value of 15 ° to 25 °, in particular 20 ° selected.
- the value chosen is preferably 6.0 to 7.0 cm, in particular 6.5 cm
- Fig. 3 formed cross-sectional area is used to about 71% to 75%, the reference value 100% by a drum with small-scale structures, see. the circular arc line 3, which in the present case connects the base of the coarse-part structures according to the invention, is formed.
- the present, saw blade-like structure has the advantage that no entrainment is required in order to be able to lift the laundry during the usual washing process.
- a suitable strategy during the washing process for example the choice of a preferred direction during reversing, a particularly favorable washing result can be achieved.
- a drum shell with four identifiable structural cells 1 "' is shown, with a structure 1"' of the drum shell located close to the square (compare the dotted line without reference numeral).
- a structure 1 "' consists of two, at least hypothetical, segments 1a"' and 1b “'such that the number of segments 1a"' and 1b "'is eight.
- the angle of inclination I "' which results in relation to a concentric to the axial center circular arc line with radius R, is 12 ° to 24 °, in particular 17 ° Fig.
- the structure curves can be easily realized by arcs or straight lines. If so-called logarithmic spirals are used, then the angle of inclination - measured against the radius vector at each point of the drum shell - has the same value.
- the drainage holes are applied with good success. It may also be expedient to supplement the structures created by the invention with conventional, smaller-scale structures (not shown) and thereby provide further drainage holes,
- Fig. 5 is a schematic cross-sectional view of a structured drum shell 2 according to the invention with an indication of a modified laundry ring 4 occurring in the invention.
- the structure height H should be at least one seventh, but usually at least at least half the thickness D of the usually forming laundry ring without deviations in the graphic representation of Fig. 5 could have a meaning.
- it is a modified Wäschering 4, which forms after spinning with a spin speed above the application speed, wherein a laundry ring with the thickness D is meant that at full load or almost at full load according to the operating instructions of the laundry treatment machine in per se usual Laundry is training.
- Fig. 6 shown in a schematic cross-sectional view with respect to the outer drum shell 3 with an unchanged circular cross-section. It can, for example, in the Fig. 1 presented structure are based.
- the individual structures 1, preferably with the segments 1 a and 1 b, which can be created from a material other than the material of the drum shell 3, are introduced on the inside of a drum shell 3 originally present and releasably detachable with the drum shell 3, as by a Clamping, or permanently, for example by welding or gluing, connected.
- the circular ring-like cross section of the original drum shell 3 is therefore retained.
- the distance of the shell 3 to the axle center also corresponds to the above-explained radius R, ie half of the diameter of the drum T.
- the material of the drum shell 3 may be stainless steel, while the material of the individual structures 1 or segments, such as 1a, 1b, a, for example thermoplastic, Plastic can be.
- the effective drum structure 2 with the structure course 2a and 2b determined, for example, via segments 1a and 1b is achieved by the individual structures 1 or segments 1a and 1b projecting inwardly relative to the outer drum shell 3 to the center axis A. It is, as well as on the basis of Fig. 1 explained, an inclination angle I of the structure profile formed, which is shown for example.
- the height H of the structure 1 is given by reference from a distance from the drum shell 3 to its tips projecting furthest inward toward the axis center.
- Measured values of the residual moisture are represented as percentage values along the ordinate as a function of the angle of inclination of an effective at the drum periphery structure 1 of the particular structured drum shell 2 with a certain inclination angle I in degrees (°) along the abscissa. It takes into account the usual definition of the residual moisture, which results as a quotient of the amount of water bound in the laundry after spinning in relation to the dry weight of the laundry.
- the mean values of the residual moisture are recognizable by block diagrams, which are connected with connecting lines. In addition, a fitted logistic function is shown, cf. the arcuate course.
- a particularly strong increase in the dehumidifying effect (reciprocal of which is the residual moisture shown in the diagram along the ordinate) is given at an angle of inclination of 10 ° to 20 °. At an angle of 20 °, there is a good spinning effect without the percentage of useful drum volume falling too much towards lesser values relative to a conventional circular drum cross-section of 100%.
- Fig. 8 a is a cross-sectional view taken on the section line a -a of the developed, structured drum shell 2. Even if only a one-dimensional structure, as previously underlying (cf. Fig. 1 ) would be present, such a presentation would result. However, it is in comparison with Fig. 8b) to see that the representation of Fig. 8 a) would result for each subarea corresponding to the division t2 along the axial direction according to vector V2. The underlying intersection a-a could also be in another series of the representation of Fig. 8b) are located.
- Fig. 8 a Thus, it also shows, as already shown in advance, that a structure 1, with the segments 1 a and 1 b, is present.
- the structure can be constructed symmetrically to a symmetry line S.
- the structure has a height H.
- the structures 1 extend over the unwinding length 2 ⁇ R of the drum shell, where R is the radius of the drum shell 3 in the unstructured state.
- Fig. 8b shows in plan view how an exemplary, two-dimensional structure results.
- Fig. 8c is an example of one of the structures 10 in the direction of the vector V2 in a sectional view corresponding to the section line c - c shown.
- the picked-out structure 10 has segments 10a and 10b. There may be a symmetrical structure symmetrical to a symmetry line S '.
- the structure 10 is with respect to Structure 1 adapted in height H, The upper plateau (without reference numeral) of the structures 1, 10 thus has no discontinuity.
- the structures do not have an upper plateau, but are almost pyramid-shaped.
- a hexagonal pyramid can also be chosen.
- the structures themselves can be constructed very differently.
- known basics about crystal classes of the plane can be used. Deviating from this, non-periodic patterns or amorphous patterns can also be formed. Random distributions or distributions that deliberately deviate at least partially from symmetrical distributions are sought. As an example, a table tennis ball bed (not shown) is given.
- the patterns can also be modified according to random criteria. It could also be a random generator for drawing or plotting used to design such patterns.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Treatment Of Fiber Materials (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Description
Die Erfindung betrifft eine Wäschetrommel für eine Wäschebehandlungsmaschine mit einem Trommelmantel, der in Umfangsrichtung verteilte Strukturen aufweist, die sich in radialer Richtung in Bezug auf eine Drehachse der Wäschetrommel mit einer Strukturhöhe erheben, wobei der Mantel einen Abstand von der Trommelachse und ein Wäschering, der insbesondere bei einem Schleuderbetrieb der Trommel in der Wäschebehandlungsmaschine ausbildbar ist, eine Dicke aufweist (sieheThe invention relates to a laundry drum for a laundry treatment machine with a drum shell having circumferentially distributed structures which rise in the radial direction with respect to a rotational axis of the laundry drum with a structure height, the jacket being spaced from the drum axis and a washing ring, in particular is formed in a spin operation of the drum in the laundry treating machine, has a thickness (see
Ferner gehört zur Erfindung ein Hausgerät mit der erfindungsgemäßen Wäschetrommel, wobei das Hausgerät insbesondere eine Waschmaschine oder ein Waschtrockner ist.Furthermore, the invention includes a domestic appliance with the laundry drum according to the invention, wherein the domestic appliance is in particular a washing machine or a washer-dryer.
Aus der
Aus der
Die bei dem vorab dargelegten Stand der Technik zur Anwendung gelangenden Strukturen müssten eigentlich als kleinteiligere Strukturen bezeichnet werden. Sie weisen nur geringe Erhebungen von beispielsweise einer Höhe von bis zu 2,5 mm auf. Diese Strukturen sind meist auch auf die Position von Drainagelöchern in Trommelmantel so abgestimmt, dass beim Schleudern Teile der Wäsche sich nicht mit den Drainagelöchern verhaken, was zu einer Beschädigung von Wäschestücken führen könnte. Die Höhe der Strukturen liegt weit unterhalb der Dicke eines Wäscheringes am Trommelmantel, der sich am Trommelmantel ausbildet. Gerade wegen den als kleinteilig zu bezeichnenden Strukturen der derzeit im praktischen Einsatz befindlichen Wäschetrommeln wird sich ein Wäschering, der beim Schleudern von Wäsche z. B. am Ende eines Waschvorganges, bei Anwendung einer Schleuderdrehzahl oberhalb einer Anlegedrehzahl, entsteht, im Wesentlichen - bei Betrachtung von dessen Querschnittsform - kreisringartig ausbilden.The structures used in the prior art described above would actually have to be called smaller-scale structures. They point only small elevations of, for example, a height of up to 2.5 mm. These structures are usually tuned to the position of drainage holes in the drum shell so that when spinning parts of the laundry do not get caught with the drainage holes, which could lead to damage of laundry items. The height of the structures is far below the thickness of a Wäscheringes the drum shell, which forms on the drum shell. Just because of the small-scale structures to be designated currently in practical use laundry drums, a laundry ring, the z. B. When spinning laundry. B. at the end of a washing process, when using a spin speed above a contact speed, arises, essentially - when looking at its cross-sectional shape - form an annular.
Es wird noch angegeben, dass es an sich, beispielsweise aus dem Gebrauchsmuster
Ferner wird noch angegeben, dass nach der
Die Aufgabe der Erfindung besteht darin, beim Schleudern von Wäschestücken bzw. von Wäscheposten zu noch besseren Ergebnissen bezüglich der Entwässerung bei einem Schleudervorgang zu gelangen. Dabei soll nicht eine weiter erhöhte Schleuderdrehzahl angestrebt werden, sondern es sollen die Möglichkeiten einer anders auszubildenden Wäschetrommel berücksichtigt werden.The object of the invention is to get even better results in terms of dewatering in a spin process when spinning laundry or laundry items. In this case, not a further increased spin speed should be sought, but it should be considered the possibilities of a different laundry drum to be trained.
Diese Aufgabe wird durch eine Wäschetrommel nach dem unabhängigen Patentanspruch gelöst. Bevorzugte Ausführungsformen sind in den abhängigen Patentansprüchen sowie in nachfolgender Beschreibung angegeben.This object is achieved by a laundry drum according to the independent claim. Preferred embodiments are indicated in the dependent claims and in the following description.
Demgemäß betrifft die Erfindung eine Wäschetrommel gemäß Anspruch 1 und ein Hausgerät gemäß Anspruch 16.Accordingly, the invention relates to a laundry drum according to claim 1 and a household appliance according to claim 16.
Soweit bei der Beschreibung der Erfindung ein Wäschering erwähnt ist, ist hierbei ein Wäschering mit Dicke D gemeint, der sich bei Vollbeladung bzw. nahezu bei Vollbeladung laut Betriebsanleitung der Wäschebehandlungsmaschine bei an sich üblichem Waschgut ausbildet. Die Dicke des Wäscheringes kann in Versuchsreihen bei Nennbeladung gemäß DIN EN 60456 und bei 50% der maximalen Enddrehzahl bestimmt werden, sofern diese Drehzahl mindestens doppelt so groß ist wie eine Anlegedrehzahl der Trommel ist, bei der sich die Wäsche in der Trommel gerade vollständig am Trommelmantel angelegt hat.As far as in the description of the invention, a Wäschering is mentioned, this is a Wäschering meant with thickness D, which forms at full load or almost at full load according to the operating instructions of the laundry treatment machine at usual laundry. The thickness of the scrubbing ring can be determined in test series at rated load in accordance with DIN EN 60456 and at 50% of the maximum final speed, provided that this speed is at least twice as large as an application speed of the drum, in which the laundry in the drum just completely on the drum shell has created.
Bei der erfindungsgemäßen Lösung wird also zunächst davon abgewichen, dass ein Wäschering bei einer Schleuderdrehzahl oberhalb der Anlegedrehzahl sich im Wesentlichen kreisringartig ausbildet, denn durch das signifikant nach innen, mit einer Dimension, die mindestens ein Siebte! des sich üblicherweise ausbildenden Wäscherings entspricht, ausgebildete Trommelprofil entsteht ein von der Ringkontur abweichender Verlauf eines quasi modifizierten Wäscherings, der am Ende eines Schleudervorganges weniger Restfeuchte, insbesondere 10% weniger Restfeuchte bei einen ungefähren Neigungswinkel der Struktur von 20°, enthält als ein üblicher im Wesentlichen kreisringartiger Wäschering bei Wäschetrommeln ohne Strukturen oder mit ausschließlich kleinteiligen Strukturen.In the solution according to the invention, therefore, it is initially deviated from the fact that a laundry ring at a spin speed above the application speed is formed substantially circular, because by the significant inward, with a dimension that at least a seventh! of the usually forming scrubbing trained, formed drum profile results in a deviating from the ring contour course of a quasi-modified scrubber, at the end of a spin cycle less residual moisture, in particular 10% less residual moisture at an approximate inclination angle of the structure of 20 °, contains as a conventional substantially Ring-like laundry ring for laundry drums without structures or with only small-scale structures.
Die bei der Erfindung bevorzugt zum Einsatz gelangenden Strukturen lassen sich weiter systematisieren.The preferred structures used in the invention can be further systematized.
In einem als einfach erscheinenden Fall ist es möglich, dass das Querschnittsprofil der Strukturen entlang der Trommelachse A gleich oder zumindest nahezu gleich ist. In der Terminologie der Erfindung ist dies eine eindimensionale Struktur. Diese eindimensionale Struktur lässt sich im Sinne der Mathematik, die mit Vektoren arbeitet, durch einen Vektor bestimmen. Ein Eindruck, der beim Betrachten des Innenraumes einer solchen Trommel entsteht, ist als ob über den Umfang verteilte Prismen vorliegen.In a seemingly simple case, it is possible that the cross-sectional profile of the structures along the drum axis A is equal or at least nearly equal. In the terminology of the invention, this is a one-dimensional structure. This one-dimensional structure can be determined by a vector in the sense of mathematics, which works with vectors. An impression created when viewing the interior of such a drum is as if prisms distributed over the circumference are present.
Wird ein Trommelmantel mit eindimensionaler Struktur über dessen Umfangslänge von 2πR abgewickelt, so liegt bei einer Teiligkeit von t1 nach je 2πR/t1 eine Strukturhöhe und eine Strukturtiefe vor.If a drum shell with a one-dimensional structure is unwound over its circumferential length of 2πR, then, given a parting of t1 to 2πR / t1, a structure height and a structure depth are present.
In einem weiteren, etwas komplexer erscheinenden Fall, ist vorgesehen, dass das Querschnittsprofil der Strukturen für jede Schnittebene senkrecht zur Trommelachse A, die von einer anderen infinitesimal beabstandet ist, mindestens um eine infinitesimale Drehung um die Trommelachse verdreht ist. In der Terminologie der Erfindung ist dies ein Fall einer zweidimensionale Struktur. Ein Eindruck, der beim Betrachten der Innenraumes einer solchen Trommel entstehen kann, ist der, ist als ob über den Umfang verteilt, ein Abdruck bzw. eine Ausformung, wie durch ein schräg verzahntes Zahnrad bedingt, vorliegen würde.In a further, somewhat more complex case, it is envisaged that the cross-sectional profile of the structures for each cutting plane perpendicular to the drum axis A, which is infinitesimally spaced from another, is rotated at least an infinitesimal rotation about the drum axis. In the terminology of the invention, this is a case of a two-dimensional structure. An impression that may arise when looking at the interior of such a drum is that, as if distributed over the circumference, there would be an impression, as would be provided by a helical gear.
Es kann bei Verwendung von zweidimensionalen Strukturen damit gerechnet werden, dass günstige Ergebnisse bezüglich der Entwässerung auch dann erreicht werden, wenn die Strukturhöhe des Trommelprofils, bezogen auf eine oder mehrere willkürlich herausgegriffene Schnittebenen senkrecht zur Trommelachse, auch erheblich, mindestens etwas, geringer als bei einer eindimensionalen Struktur ist. Dies kann dadurch erklärt werden, dass mehr ansteigende Flanken pro Flächeneinheit des Trommelmantels vorhanden sind als bei einer eindimensionalen Struktur.Using two-dimensional structures, it can be expected that favorable dewatering results will be achieved even if the structural height of the drum profile, relative to one or more arbitrarily selected cutting planes perpendicular to the drum axis, is also significantly less than one one-dimensional structure. This can be explained by having more rising flanks per unit area of the drum shell than in a one-dimensional structure.
Nachfolgend werden zunächst bevorzugte Weiterbildungen der Erfindung angegeben, die sich im Wesentlichen auf eindimensionale Strukturen beziehen.Hereinafter, preferred developments of the invention are given, which relate essentially to one-dimensional structures.
Die bei der erfindungsgemäßen Trommel zur Anwendung gelangenden Strukturen zeigen sich gegenüber den Strukturen herkömmlicher Art als grobteilig. Sie sind insbesondere, sechsteilig (vgl.
In besonderen Fällen ist davon auszugehen, die grobteiligen Strukturen vierteilig (
Die Strukturerhebungen sind im Wesentlichen nach innen in Richtung hin zur Trommelachse A gerichtet und weisen eine Strukturhöhe H auf, die mindestens 5% und höchstens 40%, des Abstandes R von der Trommelachse A betragen.The structure elevations are directed substantially inward toward the drum axis A and have a feature height H that is at least 5% and at most 40% of the distance R from the drum axis A.
Die Wirksamkeit der Strukturen hinsichtlich der Erreichens einer geringeren Restfeuchte ist stets dann gegeben, wenn mindestens 25% des Trommelmantels mit Strukturen versehen sind.The effectiveness of the structures in terms of reaching a lower residual moisture is always given when at least 25% of the drum shell are provided with structures.
Dabei beträgt der Neigungswinkel I der Strukturen 5° bis 38°, bevorzugt 10° bis 20°.The inclination angle I of the structures is 5 ° to 38 °, preferably 10 ° to 20 °.
Um die Angabe, dass die Bedeckung des Trommelmantels mit Strukturen mindestens 25% betragen soll, in ihrer Bedeutung richtig zu sehen, werden noch Angaben betreffend der Strukturen hinzugefügt. Zu einer Struktur bzw. einem Strukturelement nach der Erfindung gehört ein Element, dessen Höhe mindestens 5% des Trommelradius oder 10 mm übersteigt. Als Neigungswinkel I ist ein Mindestwert von 5° zugrunde zu legen. Auch wenn, wie dargelegt, eine Belegung des Trommelmantels mit 25% an Strukturen bzw. Strukturelementen genügt, ist dennoch zu bevorzugen, dass eine Bedeckung des Trommelmantels von nahezu 100% angestrebt wird.In order to correctly state the meaning of the coverage of the drum shell with structures at least 25%, details concerning the structures are added. To a structure or a structural element according to the invention includes an element whose height exceeds at least 5% of the drum radius or 10 mm. The inclination angle I shall be based on a minimum value of 5 °. Even if, as stated, an occupancy of the drum shell with 25% of structures or structural elements is sufficient, it is still preferable that a coverage of the drum shell of almost 100% is desired.
Nach einer anderen, abgrenzenden Betrachtung ist vorzusehen, dass in Bezug auf die höchsten Erhebungen durch ausgebildete Strukturen es so sein soll, dass die Flächenanteile, die durch Tiefen der Strukturen mit Abstand R zur Trommelachse gebildet sind, mindestens 5 % der Gesamtfläche des Trommelmantels betragen soll.According to another, delimiting consideration, it should be provided that, with respect to the highest elevations by structures formed, it should be such that the surface portions formed by depths of the structures at a distance R from the drum axis should be at least 5% of the total area of the drum shell ,
In sehr häufigen Fällen sind die Strukturen in Bezug auf eine von deren höchster Erhebung zur Trommelachse A verlaufende, hypothetische Linie S symmetrisch gebildet.In very frequent cases, the structures are symmetrically formed with respect to a hypothetical line S running from their highest elevation to the drum axis A.
Es ist jedoch auch möglich, dass eine asymmetrische Struktur vorliegt, wobei eine Steuerung eines Wäschebehandlungsvorgangs so ausführbar ist, dass die Mitnehmerfunktion eines üblicher Wäsche- Mitnehmers auch übernommen wird. Bei anderen Strukturen als dieser asymmetrischen Struktur wird meistens davon auszugehen sein, dass, insbesondere drei, Mitnehmer einzusetzen sind. Abweichend davon lehrt die
Ausgenommen für den Fall der asymmetrischen Strukturen kann es zutreffen, dass der Neigungswinkel I der Strukturen, gegen den Radiusvektor gemessen, an nahezu jeder Stelle des Trommelmantels einen gleichen Betrag aufweisen kann, wenn so genannte logarithmische Spiralen zur Ausbildung der Strukturen zugrunde gelegt werden. Im Fall von asymmetrischen Strukturen kann jedoch zumindest jeweils ein Segment der Strukturen einer logarithmischen Spirale ähnlich sein, dass heißt innerhalb dieses Segmentes der Strukturen weist der Neigungswinkel I, gegen den Radiusvektor gemessen, an nahezu jeder Stelle des Trommelmantels einen gleichen Betrag auf.Except in the case of the asymmetrical structures, it may be true that the angle of inclination I of the structures, measured against the radius vector, can be equal at almost every point of the drum shell, when so-called logarithmic spirals are used to form the structures. However, in the case of asymmetric structures, at least one segment of the structures may all be similar to a logarithmic spiral, that is, within that segment of the structures, the angle of inclination I, measured against the radius vector, is equal to almost every point of the drum shell.
Es hat sich als günstig erwiesen, dass die Strukturen bevorzugt an deren tiefster Stelle Drainagelöcher aufweisen.It has proved favorable that the structures preferably have drainage holes at their lowest point.
Ferner ist vorgesehen, dass die vorab angegebenen, erfindungsgemäßen Strukturen durch herkömmliche, kleinteilige Strukturen ergänzt werden und dabei weitere Drainagelöcher, angepasst an die kleinteiligen Strukturen eingebracht werden.Furthermore, it is provided that the structures specified above according to the invention are supplemented by conventional, finely divided structures and, in the process, further drainage holes adapted to the small-scale structures are introduced.
In einer besonderen Weiterbildung der Erfindung hat sich gezeigt, dass die vorausgehend gelehrten erste Strukturen in Umfangsrichtung des Trommelmantels über eine Umfangslänge 2πR durch zweite Strukturen in Achsrichtung des Trommelmantels über eine Länge d zu ergänzen sind, so dass ein zweidimensional strukturierter Trommelmantel vorliegt.In a particular embodiment of the invention, it has been found that the first structures taught in the circumferential direction of the drum shell over a circumferential length 2πR are to be completed by second structures in the axial direction of the drum shell over a length d, so that a two-dimensionally structured drum shell is present.
Es hat sich gezeigt, dass sich eine desto bessere Entfeuchtung einstellen kann, je mehr Flächen unterschiedlicher Ausrichtung am Trommelmantel vorliegen, ohne dass ein signifikanter Verlust an Trommelvolumen einhergeht.It has been found that the better the dehumidification, the more surfaces of different orientation on the drum shell, without a significant loss of drum volume.
Für die zweidimensionalen Strukturen gilt wie für die eindimensionalen Strukturen der Auslegungsgrundsatz, dass auch diese Strukturen grobteilig sein sollen. Nach einer zu bevorzugenden Nomenklatur ist für die ersten Strukturen eine t1- Teiligkeit und die zweiten Strukturen eine t2- Teiligkeit zu definieren. Im Regelfall ist davon auszugehen, dass jede einzelne Struktur gleichartig ist. Für die Teiligkeit t1 liegen zu bevorzugende Ergebnisse vor, wenn insbesondere t1 gleich 3 bis 30 ist und die Teiligkeit t2 gleich 3 bis 30, bevorzugt 2 bis 20, ist.For the two-dimensional structures, as for the one-dimensional structures, the design principle holds that these structures should also be coarse. According to a preferable nomenclature, for the first structures a t1-division and the second structures for a t-2-division are to be defined. As a rule, it can be assumed that every single structure is similar. For the partivity t1, preferable results are obtained when, in particular, t1 is 3 to 30 and the parting t2 is 3 to 30, preferably 2 to 20.
Statt regelmäßig ausgebildeter Strukturen können auch unregelmäßig ausgebildete Strukturen im Einzelfall empfehlenswert sein. Es ist möglich, dass regelmäßige Strukturen durch technische Mittel, wie durch einen Zufallsgenerator verändert werden. Es kann dabei zu bevorzugen sein, dass die ersten Strukturen und die zweiten Strukturen die an sich einen zunächst regelmäßigen Aufbau haben, durch einen Zufallsgenerator final ausbildbar sind. Beim automatisierten Zeichen bzw. Plotten zum Entwurf solcher Muster wird dann an geeigneter Stelle der Plotter- Einrichtung der benannte Zufallsgenerator zwischengeschaltet.Instead of regularly trained structures irregular structures can be recommended in individual cases. It is possible that regular structures are altered by technical means, such as a random number generator. In this case, it may be preferable for the first structures and the second structures, which have an initially regular structure per se, to be able to be finally formed by a random generator. When automated character or plotting to design such pattern is then interposed at a suitable location of the plotter device of the named random number generator.
Bei der Ausrichtung auf unregelmäßig ausgebildete Strukturen kann nach einer Alternative vorgesehen werden, dass die ersten und zweiten Strukturen in Gestalt periodischer oder amorpher Muster ausbildet werden.When aligned with irregularly shaped structures, it can be provided according to an alternative that the first and second structures are formed in the form of periodic or amorphous patterns.
Zurückkommend auf die regelmäßigen Strukturen hat sich in vorteilhafter Weise herausgestellt, dass die Strukturerhebungen im Wesentlichen nach innen in Richtung hin zur Trommelachse gerichtet sind und eine Strukturhöhe H aufwelsen sollen, die mindestens 5% und höchstens 40% des Abstandes R von der Trommelachse A betragen, wobei es notwendig ist, mindestens 25% des Trommelmantels mit Strukturen auszubilden.Returning to the regular structures, it has been found advantageous that the structure elevations are directed substantially inward towards the drum axis and should provide a structural height H which is at least 5% and at most 40% of the distance R from the drum axis A, wherein it is necessary to form at least 25% of the drum shell with structures.
Für die Effizienz einer Struktur soll deren Neigungswinkel I mindestens 5° betragen. es ist sinnvoll Strukturen bis zu einem Neigungswinkel von 38° einzusetzen. Als zu bevorzugen, hat sich ein Neigungswinkel von 10° bis 20° erwiesen.For the efficiency of a structure whose inclination angle I should be at least 5 °. it makes sense to use structures up to an angle of inclination of 38 °. To be preferred, an inclination angle of 10 ° to 20 ° has been found.
Soweit die Erfindung durch auf den unabhängigen Anspruch rückbezogene, nicht selbständige Ansprüche weitergebildet wird, so soll es so sein, dass eine zunächst angegebene Kette von Rückbeziehungen nicht einschränkend in Bezug auf die insgesamt mitgeteilte Lehre zu sehen ist, soweit auch andere Kombinationen von Merkmalen von Ansprüchen sich als geeignet und ausführbar aus Sicht des Fachmanns ergeben.As far as the invention is further developed by the independent claim back-related, non-independent claims, it should be so that a chain of first-mentioned relationships is not restrictive in relation to the overall teaching notified, as far as other combinations of features of claims be found to be suitable and executable from the perspective of the skilled person.
In den nachfolgend beschriebenen Figuren der beigefügten Zeichnung wird die Erfindung anhand von Ausführungsbeispielen schematisch genauer erläutert. Gleiche Bezugszeichen zeigen jeweils gleiche oder vergleichbare Teile. Die Figuren werden zunächst kurz erläutert:
- Fig. 1
- zeigt in schematisierter Querschnittsansicht einen Trommelmantel mit sechs symmetrisch aufgebauten Strukturen;
- Fig. 2
- zeigt in schematisierter Querschnittsansicht einen Trommelmantel mit zwölf symmetrisch aufgebauten Strukturen;
- Fig. 3
- zeigt in schematisierter Querschnittsansicht einen Trommelmantel mit sieben, keinen symmetrischen Aufbau besitzenden Strukturen;
- Fig. 4
- zeigt in schematisierter Querschnittsansicht einen Trommelmantel mit vier erkennbaren Strukturen, wobei eine nahe am Quadrat befindliche Struktur des Trommelmantels vorliegt;
- Fig. 5
- zeigt in schematisierter Querschnittsansicht einen Trommelmantel nach der Erfindung mit Andeutung eines bei seiner Anwendung auftretenden modifizierten Wäscheringes;
- Fig. 6
- zeigt in schematisierter Querschnittsansicht einen Trommelmantel mit Strukturen, die durch Einbau von Struktur-Einzelelementen gebildet sind;
- Fig. 7
- zeigt ein Diagramm bei dem die Restfeuchte in Abhängigkeit des Neigungswinkels von wirksamen Teilen der Strukturen des Trommelmantels dargestellt ist; und
- Fig. 8
- zeigt einen abgewickelten Trommelmantel mit den erfindungsgemäßen Strukturen, wobei in
Fig. 8 a) eine Übersichts- Querschnittsansicht entsprechend einer Schnittlinie a -a, inFig. 8 b) eine Übersichts- Draufsicht und inFig. 8c eine weitere Schnittansicht entsprechend einer Schnittlinie c - c einer beispielhaften Struktur dargestellt ist.
- Fig. 1
- shows a schematic cross-sectional view of a drum shell with six symmetrically constructed structures;
- Fig. 2
- shows a schematic cross-sectional view of a drum shell with twelve symmetrically constructed structures;
- Fig. 3
- shows in a schematic cross-sectional view of a drum shell with seven, no symmetrical structure possessing structures;
- Fig. 4
- shows a schematic cross-sectional view of a drum shell with four recognizable structures, wherein there is a close-squared structure of the drum shell;
- Fig. 5
- shows in a schematic cross-sectional view of a drum shell according to the invention with the indication of a modified laundry ring occurring during its application;
- Fig. 6
- shows a schematic cross-sectional view of a drum shell with structures formed by incorporation of structural single elements;
- Fig. 7
- shows a diagram in which the residual moisture is shown as a function of the angle of inclination of effective parts of the structures of the drum shell; and
- Fig. 8
- shows a developed drum shell with the structures according to the invention, wherein in
Fig. 8 a) an overview cross-sectional view corresponding to a section line a -a, inFig. 8b) an overview top view and inFig. 8c a further sectional view corresponding to a section line c - c of an exemplary structure is shown.
Die in der
In
In
In
In
Die Strukturverläufe können ohne Weiteres durch Bögen oder Geraden realisiert werden. Werden so genannte logarithmische Spiralen verwendet, so weist der Neigungswinkel - gemessen gegen den Radiusvektor an jeder Stelle des Trommelmantels - denselben Wert auf.The structure curves can be easily realized by arcs or straight lines. If so-called logarithmic spirals are used, then the angle of inclination - measured against the radius vector at each point of the drum shell - has the same value.
An der tiefsten Stelle der Strukturen werden mit gutem Erfolg die Drainagelöcher angebracht. Es kann auch zweckmäßig sein, die mit der Erfindung geschaffenen Strukturen um herkömmliche, kleinteiligere Strukturen (nicht dargestellt) zu ergänzen und dabei weitere Drainagelöcher vorzusehen,At the lowest point of the structures, the drainage holes are applied with good success. It may also be expedient to supplement the structures created by the invention with conventional, smaller-scale structures (not shown) and thereby provide further drainage holes,
In
Da die besonderen Strukturen, wie obig erwähnt, auch durch einen Einbau entsprechend geformter Struktur-Einzelelemente geschaffen werden können, ist dies in
Mit dem Diagramm in
Es hat sich also gezeigt, dass bei einem Ansteigen der Neigungswinkel I der Trommelstruktur eine Verbesserung der Restfeuchte von bis zu 10% erreicht werden kann. Damit ist die erfindungsgemäß angestrebte Wirkung bereits gut erreicht. Es wird dabei ein gewisser Verlust von Trommelvolumen akzeptiert.It has thus been shown that with an increase in the inclination angle I of the drum structure, an improvement in the residual moisture of up to 10% can be achieved. Thus, the present invention sought effect is already well achieved. It is thereby accepted a certain loss of drum volume.
Nachfolgend werden noch die im Einleitungsteil der Beschreibung erläuterten, zweidimensionalen Strukturen im Einzelnen für eine ausgewählte Ausführungsform noch genauer beschrieben. Auf den bereits erläuterten Effekt, dass bei einer gleich guter Entfeuchtungswirkung wie bei einer vergleichbaren eindimensionalen Struktur der Verlust an Trommelvolumen noch etwas geringer ausfällt, wurde bereits hingewiesen.In the following, the two-dimensional structures explained in detail in the introductory part of the description will be described in more detail for a selected embodiment. It has already been pointed out that the loss of drum volume is somewhat lower with the same good dehumidifying effect as with a comparable one-dimensional structure.
In
In
In Abänderung des herausgegriffenen Beispiels ist es auch möglich, dass die Strukturen kein oberes Plateau aufweisen, sondern fast Pyramiden- förmig aufgebaut sind. Statt einer vierflächigen Pyramide kann auch eine sechsflächige Pyramide gewählt werden.In a modification of the example outlined, it is also possible that the structures do not have an upper plateau, but are almost pyramid-shaped. Instead of a tetrahedral pyramid, a hexagonal pyramid can also be chosen.
Die Strukturen an sich können sehr verschiedenartig aufgebaut sein. Bei periodischen Strukturen können an sich bekannte Grundlagen über Kristallklassen der Ebene herangezogen werden. Abweichend davon können auch nichtperiodische Muster bzw. amorphe Muster ausgebildet werden. Es werden dabei Zufallsverteilungen oder Verteilungen, die bewusst zumindest partiell von symmetrischen Verteilungen abweichen, angestrebt. Als Beispiel hiezu wird eine Tischtennisballschüttung (nicht dargestellt) angegeben.The structures themselves can be constructed very differently. For periodic structures, known basics about crystal classes of the plane can be used. Deviating from this, non-periodic patterns or amorphous patterns can also be formed. Random distributions or distributions that deliberately deviate at least partially from symmetrical distributions are sought. As an example, a table tennis ball bed (not shown) is given.
Die Muster können auch nach Zufallskriterien abgewandelt werden. Es könnte dabei auch ein Zufallgenerator für das Zeichnen bzw. Plotten zum Entwurf solcher Muster eingesetzt werden.The patterns can also be modified according to random criteria. It could also be a random generator for drawing or plotting used to design such patterns.
Wichtig ist jedoch, dass durch ein durch die beispielsweise angegebenen Grundlagen und technischen Mittel gewonnenes Muster als Grundlage einer zweidimensionalen Struktur mit zwei Vektoren ein guten Drainageeffekt bei Einsatz in einer erfindungsgemäßen Trommel T bedingt, wobei ein grundsätzlicher im Sinne der Erfindung gewonnener Erkenntnisstand dem Fachmann das Rüstzeug gibt, mit sehr wenigen Experimenten zu einer geeigneten Lösung zu gelangen.However, it is important that a good drainage effect when used in a drum T according to the invention is achieved by a pattern obtained by the example given bases and technical means as the basis of a two-dimensional structure with two vectors, with a knowledge of fundamentally obtained in the sense of the invention the expert to arrive at a suitable solution with very few experiments.
- 11
- Strukturstructure
- 1a, 1b1a, 1b
- Segment zu 1Segment to 1
- 22
- strukturierter Trommelmanteltextured drum casing
- 33
- Trommelmantel (unstrukturiert)Drum shell (unstructured)
- 44
- Wäscheringlaundering ring
- II
- Neigungswinkel TrommelmantelTilt angle drum shell
- HH
- Höhe TrommelprofilHeight drum profile
- AA
- Achse bzw. AchsmittelpunktAxis or axis center
- DD
-
Dicke des Wäscherings 4Thickness of the
scrubbing 4 - SS
- Symmetrielinieline of symmetry
- RR
- Abstand Trommelmantel bzw. der Tiefen der StrukturenDistance drum shell or the depths of the structures
- TT
- Trommel von WäschebehandlungsmaschineDrum of laundry treatment machine
- t1t1
- Teiligkeit der Trommel in UmfangsrichtungDivision of the drum in the circumferential direction
- t2t2
- Teiligkeit der Trommel in AchsrichtungDivision of the drum in the axial direction
- dd
- Dimension des Trommelmantels in AchsrichtungDimension of the drum shell in the axial direction
- 1010
- Struktur in Achsrichtung im Trommelmantel (bei Ausführung zweidimensional)Structure in the axial direction in the drum shell (when executed in two dimensions)
- 10a, 10b10a, 10b
- Segment zu 10Segment to 10
- V1V1
- Vektor in UmfangsrichtungVector in the circumferential direction
- V2V2
- Vektor auf Trommelmantel in AchsrichtungVector on drum coat in the axial direction
- a - aa - a
-
Schnittlinie für die Darstellung in
Fig. 8 a) Cutting line for the representation inFig. 8 a) - c - cc - c
-
Schnittlinie für die Darstellung in
Fig. 8 c) Cutting line for the representation inFig. 8c)
Claims (17)
- Laundry drum (T) for a laundry treatment machine having a drum shell (3) which has structures (1) distributed in the circumferential direction and raised in the radial direction in relation to an axis of rotation (A) of the laundry drum with a structure height (H), wherein the shell has a spacing (R) from the drum axis and a ring of laundry (4), which is able to be formed in particular in the laundry treatment machine during a spin-drying operation of the drum, has a thickness (D), wherein at least 25% of the drum shell (3) is configured with the structures (1), characterised in that the structures (1, 1a, 1b) at least have cross-sectional profiles which, relative to the drum shell (3) with a spacing (R) from the drum axis, have at least a slight inclination with an angle of inclination (I), wherein the structure height (H) is at least one-seventh of the thickness (D) of the ring of laundry (4) which forms, the thickness thereof being determined in a series of tests at nominal load of the laundry treatment machine according to DIN EN 60456 and at 50% of the maximum final rotational speed, provided said rotational speed is at least double the value of an application rotational speed of the drum, the laundry in the drum having been completely applied against the drum shell.
- Laundry drum according to claim 1, characterised in that the cross-sectional profile of the structures (1, 1a, 1b) along the drum axis (A) is virtually the same.
- Laundry drum according to claim 1, characterised in that the cross-sectional profile of the structures (1, 1a, 1b) for each cutting plane perpendicular to the drum axis (A), which is very slightly spaced apart from the next, is rotated by at least a very slight rotation about the drum axis.
- Laundry drum according to at least one of claims 1 to 3, characterised in that the structures (1, 1a, 1b) are rough structured, i.e. in 3 to 30 parts, and thus a rough-structured drum shell (3) is formed.
- Laundry drum according to claim 4, characterised in that the structures (1, 1a, 1b) are in four parts, seven parts or twelve parts.
- Laundry drum according to one of claims 1 to 5, characterised in that the structures (1, 1a, 1b) are formed symmetrically relative to a hypothetical line (S) extending from the highest raised portion thereof to the drum axis (A).
- Laundry drum according to one of claims 1 to 5, characterised in that the structures (1, 1a, 1b) are formed asymmetrically relative to a hypothetical line (S) extending from the highest raised portion thereof to the drum axis (A).
- Laundry drum according to one of claims 1 to 7, characterised in that the angle of inclination (I) of at least one segment of the structures measured against the radius vector has the same value at almost every point of the drum shell, in particular the cross-sectional profile of at least one segment of the structures (1, 1a, 1b) for each cutting plane perpendicular to the drum axis (A) is similar to a logarithmic spiral, wherein a segment (1a, 1b) is defined by the points of intersection of the radius vector extending through the drum axis (A) and the cross section of a structure (1) which have the greatest and smallest spacings from the drum axis (A).
- Laundry drum according to at least one of the preceding claims, characterised in that the structures (1, 1a, 1b) preferably have drainage holes at the lowest point thereof.
- Laundry drum according to at least one of the preceding claims, characterised in that the structures (1, 1a, 1b) according to the preceding claims are complemented by structures which protrude only up to 2.5 mm relative to the circular arc line (3) with the drum radius (R) and in this case have further drainage holes adapted to the simple structures.
- Laundry drum according to claim 1, characterised in that in addition to the structures (1, 1a, 1b), the first structures, second structures (10, 10a, 10b) are formed in the circumferential direction (V1) of the drum shell over a circumferential length 2πR in the axial direction (V2) of the drum shell over a length d on the drum shell.
- Laundry drum according to claim 11, characterised in that the structures are rough structured, i.e. the first structures (1, 1a, 1b) are in 3 to 30 parts and the second structures (10, 10a, 10b) are in 3 to 30 parts, wherein each individual structure is similar.
- Laundry drum according to claim 11, characterised in that the first structures and the second structures in terms of shape are configured as periodic or amorphous patterns.
- Laundry drum according to one of claims 1 to 6 and 11 and 12, characterised in that the structural raised portions are oriented substantially to the inside in the direction of the drum axis (A) and have a structure height (H) which is at least 5% and at most 40% of the spacing (R) from the drum axis (A).
- Laundry drum according to one of claims 1 to 6 and 11 and 12, characterised in that the angle of inclination (I) of the structures is 5° to 38°, preferably 10° to 20°.
- Household appliance for laundry treatment comprising a laundry drum, characterised in that the laundry drum (2, 2a, 2b) is configured according to one of claims 1 to 15.
- Household appliance according to claim 16, characterised in that the household appliance is a washing machine or a washer/dryer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL12753511T PL2758582T3 (en) | 2011-09-20 | 2012-09-04 | Laundry drum having a drum profile for optimized spin-drying action |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102011083015.4A DE102011083015B4 (en) | 2011-09-20 | 2011-09-20 | Laundry drum with drum profile for optimized spin effect |
PCT/EP2012/067214 WO2013041370A1 (en) | 2011-09-20 | 2012-09-04 | Laundry drum having a drum profile for optimized spin-drying action |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2758582A1 EP2758582A1 (en) | 2014-07-30 |
EP2758582B1 true EP2758582B1 (en) | 2015-08-19 |
Family
ID=46763117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12753511.0A Active EP2758582B1 (en) | 2011-09-20 | 2012-09-04 | Laundry drum having a drum profile for optimized spin-drying action |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2758582B1 (en) |
CN (1) | CN103814166B (en) |
DE (1) | DE102011083015B4 (en) |
PL (1) | PL2758582T3 (en) |
RU (1) | RU2600054C2 (en) |
WO (1) | WO2013041370A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018112931A1 (en) * | 2018-05-30 | 2019-12-05 | Miele & Cie. Kg | Laundry drum and washing machine |
PL3715522T3 (en) * | 2019-03-26 | 2022-09-12 | Electrolux Appliances Aktiebolag | Washing drum for a laundry washing machine and laundry washing machine equipped with such drum |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1963811U (en) | 1965-03-09 | 1967-07-13 | Constructa Werke G M B H | WASHING DRUM AND SPIN DRUM WITH ELASTIC DRIVING RIBS. |
DE1963811A1 (en) | 1969-12-19 | 1971-06-24 | Kunstatofferk Gebr Anger Gmbh | Prodn of extruded, thermoplastic, integral - foam hollow bodies |
JPS518625Y2 (en) * | 1971-06-14 | 1976-03-08 | ||
DE10162918A1 (en) | 2001-12-20 | 2003-07-03 | Bsh Bosch Siemens Hausgeraete | Drum for a laundry treatment machine |
JP4387812B2 (en) * | 2004-01-23 | 2009-12-24 | 株式会社東芝 | Drum washing machine |
JP3114286U (en) * | 2005-04-06 | 2005-10-27 | 渡辺 忠良 | Baffle that reduces vibration of drum-type washing machine and produces high cleaning power |
JP4610464B2 (en) * | 2005-10-26 | 2011-01-12 | 三洋電機株式会社 | Laundry dehydration drying equipment |
DE102006041431A1 (en) | 2005-12-07 | 2007-06-14 | Heinz Herbertz | Machine and method of textile treatment for washing machines and dryers has corrugations in drum shell with wave-like convex and concave bends parallel to drum axis |
US20090276966A1 (en) * | 2006-07-06 | 2009-11-12 | Bsh Bosch Und Siemens Hausgerate Gmbh | Washing machine with hollow agitators |
KR20080095502A (en) * | 2007-04-24 | 2008-10-29 | 삼성전자주식회사 | Drum type washer and method thereof |
DE102008004661A1 (en) * | 2008-01-16 | 2009-07-23 | BSH Bosch und Siemens Hausgeräte GmbH | Drum for a laundry treatment machine |
DE102008006511A1 (en) | 2008-01-29 | 2009-07-30 | BSH Bosch und Siemens Hausgeräte GmbH | Laundry drum for a laundry treatment machine |
CN201169699Y (en) * | 2008-01-30 | 2008-12-24 | 苏州三星电子有限公司 | Novel internal barrel ring structure of drum-type washing machine |
KR20090096949A (en) * | 2008-03-10 | 2009-09-15 | 엘지전자 주식회사 | Clothes treating machine and control method thereof |
DE102008029911A1 (en) * | 2008-06-24 | 2009-12-31 | BSH Bosch und Siemens Hausgeräte GmbH | Drum for washing machines and dryers comprises a flat catch side having a surface which is partly provided with a material which is gentle to laundry |
-
2011
- 2011-09-20 DE DE102011083015.4A patent/DE102011083015B4/en active Active
-
2012
- 2012-09-04 CN CN201280045895.XA patent/CN103814166B/en active Active
- 2012-09-04 EP EP12753511.0A patent/EP2758582B1/en active Active
- 2012-09-04 WO PCT/EP2012/067214 patent/WO2013041370A1/en active Application Filing
- 2012-09-04 PL PL12753511T patent/PL2758582T3/en unknown
- 2012-09-04 RU RU2014114127/12A patent/RU2600054C2/en active
Also Published As
Publication number | Publication date |
---|---|
CN103814166B (en) | 2016-12-28 |
RU2600054C2 (en) | 2016-10-20 |
DE102011083015B4 (en) | 2019-08-14 |
CN103814166A (en) | 2014-05-21 |
DE102011083015A1 (en) | 2013-03-21 |
PL2758582T3 (en) | 2016-01-29 |
EP2758582A1 (en) | 2014-07-30 |
WO2013041370A1 (en) | 2013-03-28 |
RU2014114127A (en) | 2015-10-27 |
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