EP2238284A1 - Drum for a laundry treatment machine - Google Patents

Drum for a laundry treatment machine

Info

Publication number
EP2238284A1
EP2238284A1 EP09702635A EP09702635A EP2238284A1 EP 2238284 A1 EP2238284 A1 EP 2238284A1 EP 09702635 A EP09702635 A EP 09702635A EP 09702635 A EP09702635 A EP 09702635A EP 2238284 A1 EP2238284 A1 EP 2238284A1
Authority
EP
European Patent Office
Prior art keywords
drum
jacket
rows
width
embossings
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.)
Granted
Application number
EP09702635A
Other languages
German (de)
French (fr)
Other versions
EP2238284B1 (en
Inventor
Christoph Oertel
Uwe Ratfisch
Stephan Sommer
Wilfried Wildung
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2238284A1 publication Critical patent/EP2238284A1/en
Application granted granted Critical
Publication of EP2238284B1 publication Critical patent/EP2238284B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • 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 drum for a laundry treatment machine, wherein the drum is rotatably mounted within the housing of the laundry treatment machine and has at least one bottom plate and a jacket, which are provided individually or both with a bulge structure.
  • Such a drum is known from DE 10 2006 010 179 A1.
  • individual elements of arch structures are arranged in the drum shell in a line along the circumferential direction, the contour of which lies in alignment with the drum shell forming a surface with a plurality of continuous arcuate boundaries and having only a single axis of symmetry which is at least approximately symmetrical extends in the circumferential direction of the drum shell.
  • flood holes are provided, through which an exchange between the interior of the drum and its surroundings can take place.
  • a drum shell with a pure wave or ribbed structure is not stable enough and also represents a not insignificant problem in terms of manufacturing technology because a jacket sheet with a corrugated or ribbed structure can only be connected very difficultly to the bottoms of the drum.
  • the invention is therefore based on the object of combining the advantages of the proposals from the prior art so that a direction of rotation dependent different effect can be achieved that the flood holes laundry Can be arranged and distributed gently and that the structure has its own scooping, can be drawn from the bottom of the tub in stock during the drum rotation water and promoted from the top of the laundry.
  • this object is achieved by the features described in the characterizing part of claim 1 in the manner that the arch structure consists of at least two drum at least partially comprehensive rows of prismatic imprints with a substantially rectangular base, of which the one in A circumferential direction of the drum directed surface at a steep angle, the opposing surface at a shallow angle and of which the side surfaces are at an almost almost right angle to the mantle.
  • Such prism-like embossments which are stamped in dense rows in front of and next to one another in the jacket plate, imitate the customers convincing wash-wave structures of the prior art, are very easy to implement by stamping and are significantly involved due to their large number of the required washing mechanics. Due to the different steepness of the prism surfaces, the laundry distribution within the drum and the drainage of the laundry during the spin cycle improve; because the active surfaces are separated from each other: The flat, unperforated surface with high contact pressure of the laundry for drainage and the steep, perforated surface ensure good and barrier-free water drainage. Due to the increased scooping action of the water level can be lowered at the bottom of the surrounding tub, whereby the so-called dead fleet is reduced.
  • the new structure also shows an increase in the rigidity of the entire drum.
  • the embossing can form a alsölbende on the outside or on the inside of the shell structure.
  • the embossments can be made substantially the same. Only the flood holes should be directed from the inside to the outside, as long as the drum is used in a liquid-handling laundry treatment machine.
  • the decision on the dimensions and the arrangements of the individual embossments to each other must also be the design environment reserved, which should be matched with the processes of the laundry treatment.
  • the width of the rectangular base may be about its length or twice its length, and so on.
  • the adjacent rows may be offset from each other so that adjacent imprints do not correspond to each other.
  • the mixed application of embossments of different dimensions which should be in an even relationship to each other to obtain the desired rib structure, can be considered.
  • FIG. 1 shows a laundry drum of a laundry treatment machine with three
  • FIG. 2 shows the ratio of drum rotation to lye flow in the case of a structure embossed from the outside to the inside on the basis of a section running through the drum casing along the circumferential direction
  • FIG. 3 Drum rotation and liquor flow according to FIG. 2 in the case of a structure stamped from the inside to the outside, FIG.
  • Fig. 4 shows a portion of a drum shell prior to rolling into a cylinder having embossments in a ratio of width (dimension parallel to the drum axis) to length (dimension in the circumferential direction) of the rectangular base of 2: 1 in the distribution of three rows of embossments on the entire width of the drum shell,
  • FIG. 5 shows a section according to FIG. 4 with an aspect ratio of 4: 1 and also three rows of embossings
  • FIG. 6 shows a section according to FIG. 4 with an aspect ratio of 2: 1 and six rows of embossings
  • FIG. 5 shows a section according to FIG. 4 with an aspect ratio of 4: 1 and also three rows of embossings
  • FIG. 6 shows a section according to FIG. 4 with an aspect ratio of 2: 1 and six rows of embossings
  • FIG. 6 shows a section according to FIG. 4 with an aspect ratio of 2: 1 and six rows of embossings
  • FIG. 7 shows a portion of FIG. 4, in which the juxtaposed
  • FIG. 8 shows a portion of FIG. 5, in which the juxtaposed
  • Embossments are offset from each other by half a length
  • FIG. 9 shows a portion of FIG. 7, in which the juxtaposed
  • Embossments are offset from each other by half a length
  • FIG. 10 shows a section according to FIG. 6, in which embossings with different aspect ratios are mixed.
  • the laundry drum 1 shown in FIG. 1 is shown in isolation outside the associated laundry treatment machine, in which it could rotate about an axis 1, and contains a bottom disk 3 with which the drum can be fastened by means of a drum star 4 in the laundry treatment machine can.
  • the drum shell 5 is fixed in a known manner to the bottom plate 3 and carries three circumferential rows of coins 6. Since the drum shell 5 no flood holes can be seen, this drum could be provided for a laundry treatment machine whose treatment processes are not performed with liquid.
  • the dashed lines 7 denote a circumferential line of the drum.
  • the sections shown in Fig. 2 and 3 pass through the drum shell 5, which is equipped in these examples of liquid performed laundry treatment processes with flood holes 8, sitting in the steep flanks 10 of the prismatic embossing 5.
  • the transitions between the steep (10) and the flat flanks 9 are reproduced heavily rounded. However, they can also be sharp-edged, similar to the representation in FIG.
  • In the direction of rotation 11 of the drum draw the inward embossments 6 through their flood holes 8 a large amount of water (arrows 12).
  • water escapes again - then in lower amount at normal treatment speed, but in significant amount at spin speed (against arrow 12).
  • the embossings 5 also have side surfaces 25 which are at least approximately perpendicular to the drum shell 5. In Fig. 2, one of these side surfaces 25 of an embossing 5 is represented by a rasterized surface.
  • the drum shell section shown in Fig. 4 shows coins 13 with a ratio of the edge lengths of its rectangular base of 2: 1, corresponding to the width 14 (parallel to the drum axis 2) to the length 15 (in the circumferential direction).
  • the embossments 13 of this size only three rows on the drum shell width M side by side space.
  • the section in Fig. 5 also has embossings 16 of the width 14. They are compared to the embossments 13 in Fig. 4 but only half as long (length 17). Therefore, their aspect ratio is 4 to 5: 1. From this shape of the embossments 16 also go three rows on the width M of the drum shell. 5
  • embossments 18 go to the width M of the drum shell 5 in Fig. 6; Although these also have the length 17 as in Fig. 5 but a width 19, which is only half as large as that in Fig. 4 and 5. Therefore, the aspect ratio - as in Fig. 4 - 2: 1. In addition are also embossments possible whose width and length at least nearly match. With enough small widths, you can even accommodate twelve or more rows of imprints in the drum shell 5.
  • the fraction of the length does not have to be proportional to the number of rows. The smaller the offset between the rows, the lower the tendency for the drum shell 5 to buckle during the molding of the cylinder.
  • the tendency to buckling can be reduced by sufficiently small lengths 21 of the embossments 20 and 22.
  • the example of FIG. 10 is characterized by another peculiarity: The imprints are not all the same width. In contrast to their length 21, the embossings 20 have twice the width 19. In between, however, embossments 22 are repeatedly arranged whose width 14 is four times their length 21.
  • the additional peculiarity in this example is that these wider embossments 22 are also regularly arranged so that, as the drum rotates, the laundry rolling on its inside is moved in the direction of the regular displacement of the additional embossments 22 in the direction parallel to the drum axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

A drum for a laundry treatment machine that is rotatably mounted within the housing of the laundry treatment machine, and wherein the drum includes a bottom disk and a jacket which are individually or jointly provided with a curved structure. The curved structure includes at least two rows of prism-type embossings that have substantially rectangular base, and the at least two rows encompass at least partially the drum. A surface of embossings that is directed in a circumferential direction of the drum is arranged at a steep angle to the jacket; an opposing surface of the embossings is arranged at a flat angle to the jacket; and lateral surfaces of the embossings are arranged at least nearly at a right angle to the jacket.

Description

Trommel für eine Wäschebehandlungsmaschine Drum for a laundry treatment machine
[0001] Die Erfindung betrifft eine Trommel für eine Wäschebehandlungsmaschine, wobei die Trommel innerhalb des Gehäuses der Wäschebehandlungsmaschine drehbar gelagert ist und mindestens eine Bodenscheibe sowie einen Mantel aufweist, die einzeln oder beide mit einer Wölbstruktur versehen sind.The invention relates to a drum for a laundry treatment machine, wherein the drum is rotatably mounted within the housing of the laundry treatment machine and has at least one bottom plate and a jacket, which are provided individually or both with a bulge structure.
[0002] Eine derartige Trommel ist aus DE 10 2006 010 179 A1 bekannt. Darin sind in den Trommelmantel in jeweils einer Linie entlang der Umfangsrichtung einzelne EIe- mente von Wölbstrukturen angeordnet, deren in der Flucht des Trommelmantels liegende Kontur eine Fläche mit mehreren, stetig ineinander übergehenden, bogenförmigen Grenzen bildet und nur eine einzige Symmetrieachse aufweist, die wenigstens annähernd in Umfangsrichtung des Trommelmantels verläuft. In den am stärksten gegenüber der Flucht des Trommelmantels ansteigenden Wandungsteilen der Elemente sind Flutlöcher angebracht, durch die ein Austausch zwischen dem Inneren der Trommel und ihrer Umgebung stattfinden kann.Such a drum is known from DE 10 2006 010 179 A1. In this arrangement, individual elements of arch structures are arranged in the drum shell in a line along the circumferential direction, the contour of which lies in alignment with the drum shell forming a surface with a plurality of continuous arcuate boundaries and having only a single axis of symmetry which is at least approximately symmetrical extends in the circumferential direction of the drum shell. In the wall parts of the elements which rise the most towards the escape of the drum shell, flood holes are provided, through which an exchange between the interior of the drum and its surroundings can take place.
[0003] In DE-PS 70 397 und in DE-AS 1 174 738 sind Wäschetrommeln beschrieben, deren Trommelmäntel quer zur Umfangsrichtung Leisten bzw. Rippen aufweisen. Diese dadurch gebildete Innen-Struktur soll den Effekt eines Waschbrettes nachahmen, bei dessen Einsatz die Wäsche von Hand über die Wellenstruktur gerieben wurde. Dieser Effekt kann die mechanische Behandlung der Wäsche unterstützen; er wird daher von Wäschereiexperten befürwortet. Die Trommel aus der DE 10 2006 010 179 A1 kann diesen Effekt nicht in ausreichendem Umfang darstellen, well dazu die Zahl der Elemente zu klein ist. Andererseits ist ein Trommelmantel mit reiner Wellen- bzw. Rip- penstruktur nicht stabil genug und stellt auch in fertigungstechnischer Hinsicht ein nicht geringes Problem dar, weil sich ein Mantelblech mit Wellen- oder Rippenstruktur nur sehr schwierig mit den Böden der Trommel verbinden lässt.In DE-PS 70 397 and DE-AS 1 174 738 laundry drums are described, the drum shells have transversely to the circumferential direction strips or ribs. This interior structure formed thereby is intended to mimic the effect of a washboard, in the use of which the laundry was rubbed by hand on the wave structure. This effect can assist the mechanical treatment of the laundry; he is therefore advocated by laundry experts. The drum of DE 10 2006 010 179 A1 can not sufficiently represent this effect, because the number of elements is too small. On the other hand, a drum shell with a pure wave or ribbed structure is not stable enough and also represents a not insignificant problem in terms of manufacturing technology because a jacket sheet with a corrugated or ribbed structure can only be connected very difficultly to the bottoms of the drum.
[0004] Der Erfindung liegt daher die Aufgabe zugrunde, die Vorteile der Vorschläge aus dem Stande der Technik so miteinander zu vereinigen, dass eine Drehrichtungsab- hängig unterschiedliche Wirkung erzielt werden kann, dass die Flutlöcher Wäsche [0005] schonender angeordnet und verteilt werden können und dass die Struktur eine eigene Schöpfwirkung mitbringt, durch die aus einer unten im Laugenbehälter vorrätigen Wassermenge während der Trommeldrehung Wasser geschöpft und von oben auf die Wäsche gefördert werden kann. [0006] Erfindungsgemäß wird diese Aufgabe durch die im Kennzeichen des Anspruches 1 beschriebenen Merkmale in der der Weise gelöst, dass die Wölbstruktur aus mindestens zwei die Trommel wenigstens teilweise umfassenden Reihen von prismenartigen Prägungen mit einer im Wesentlichen rechteckigen Grundfläche besteht, von den die eine in Umfangsrichtung der Trommel gerichtete Fläche in einem steilen Win- kel, die entgegen gerichtete Fläche in einem flachen Winkel und von denen die Seitenflächen in einem wenigstens nahezu rechten Winkel zum Mantel stehen. Solche prismenartigen Prägungen, die in dichten Reihen vor- und nebeneinander in das Mantelblech geprägt sind, ahmen den Kunden überzeugende Waschbett-Wellenstrukturen des Standes der Technik nach, sind durch Prägepressen sehr einfach umzusetzen und sind aufgrund ihrer Vielzahl an der erforderlichen Waschmechanik wesentlich beteiligt. Durch die unterschiedliche Steilheit der Prismenflächen verbessern sich die Wäscheverteilung innerhalb der Trommel und die Entwässerung der Wäsche während des Schleudergangs; denn die Wirkflächen sind voneinander getrennt: Die flache ungelochte Fläche sorgt mit hohem Anpressdruck der Wäsche für die Entwässerung und die stei- Ie, gelochte Fläche für eine gute und barrierefrei Wasserabfuhr. Durch die verstärkte Schöpfwirkung kann der Wasserstand am Boden des umgebenden Laugenbehälters abgesenkt werden, wodurch die sogenannte tote Flotte vermindert wird. Letztendlich lässt die neue Struktur auch eine Erhöhung der Steifigkeit der gesamten Trommel erkennen. [0007] Je nach konstruktiven Umfeldbedingungen können die Prägungen eine auf der Außenseite oder auf die Innenseite des Mantels sich aufwölbende Struktur bilden. Da die Prägungen jedenfalls vor dem Rollen des Trommelmantels hergestellt werden, können die Prägungen im Wesentlichen gleich gestaltet sein. Lediglich die Flutlöcher sollten, sofern die Trommel in einer Flüssigkeit führenden Wäschebehandlungsmaschi- ne angewendet wird, von der Innenseite zur Außenseite gerichtet sein. [0008] Die Entscheidung über die Abmessungen und der Anordnungen der einzelnen Prägungen zueinander muss ebenfalls den konstruktiven Umfeldbedingungen vorbehalten bleiben, die mit den Prozessabläufen der Wäschebehandlung abgestimmt werden sollten. Beispielsweise kann die Breite der rechteckigen Grundfläche etwa ihrer Länge oder dem Doppelten ihrer Länge u.s.w. entsprechen. Auch können die nebeneinander liegenden Reihen so zueinander versetzt sein, dass benachbarte Prägungen nicht miteinander korrespondieren. Auch die gemischte Anwendung von Prägungen unterschiedlicher Abmessungen, die zueinander in einem geradzahligen Verhältnis stehen sollten, um die erwünschte Rippenstruktur zu erhalten, kann erwogen werden. Die in den Unteransprüchen beschriebenen Merkmale können zusammen mit denen des Anspruchs 1 einzeln oder gemeinsam in jeder möglichen Kombination angewendet werden, ohne den gemeinsamen Erfindungsgedanken zu verlassen.The invention is therefore based on the object of combining the advantages of the proposals from the prior art so that a direction of rotation dependent different effect can be achieved that the flood holes laundry Can be arranged and distributed gently and that the structure has its own scooping, can be drawn from the bottom of the tub in stock during the drum rotation water and promoted from the top of the laundry. According to the invention, this object is achieved by the features described in the characterizing part of claim 1 in the manner that the arch structure consists of at least two drum at least partially comprehensive rows of prismatic imprints with a substantially rectangular base, of which the one in A circumferential direction of the drum directed surface at a steep angle, the opposing surface at a shallow angle and of which the side surfaces are at an almost almost right angle to the mantle. Such prism-like embossments, which are stamped in dense rows in front of and next to one another in the jacket plate, imitate the customers convincing wash-wave structures of the prior art, are very easy to implement by stamping and are significantly involved due to their large number of the required washing mechanics. Due to the different steepness of the prism surfaces, the laundry distribution within the drum and the drainage of the laundry during the spin cycle improve; because the active surfaces are separated from each other: The flat, unperforated surface with high contact pressure of the laundry for drainage and the steep, perforated surface ensure good and barrier-free water drainage. Due to the increased scooping action of the water level can be lowered at the bottom of the surrounding tub, whereby the so-called dead fleet is reduced. Finally, the new structure also shows an increase in the rigidity of the entire drum. Depending on the design environment conditions, the embossing can form a aufölbende on the outside or on the inside of the shell structure. In any case, since the embossments are made prior to rolling the drum shell, the embossments can be made substantially the same. Only the flood holes should be directed from the inside to the outside, as long as the drum is used in a liquid-handling laundry treatment machine. The decision on the dimensions and the arrangements of the individual embossments to each other must also be the design environment reserved, which should be matched with the processes of the laundry treatment. For example, the width of the rectangular base may be about its length or twice its length, and so on. Also, the adjacent rows may be offset from each other so that adjacent imprints do not correspond to each other. Also, the mixed application of embossments of different dimensions, which should be in an even relationship to each other to obtain the desired rib structure, can be considered. The features described in the dependent claims can be used together with those of claim 1 individually or collectively in any combination possible, without departing from the common inventive idea.
[0009] Anhand von in der Zeichnung dargestellten Ausführungsbeispielen ist die Erfindung nachstehend erläutert. Es zeigen Fig. 1 eine Wäschetrommel einer Wäschebehandlungsmaschine mit dreiOn the basis of embodiments shown in the drawings, the invention is explained below. 1 shows a laundry drum of a laundry treatment machine with three
Reihen von in den Trommelmantel von innen nach außen geprägten prismenartigen Elementen,Rows of prism-like elements embossed in the drum casing from the inside to the outside,
Fig. 2 anhand eines entlang der Umfangsrichtung verlaufenden Schnitts durch den Trommelmantel das Verhältnis von Trommeldrehung zu Laugenfluss bei einer von außen nach innen geprägten Struktur,FIG. 2 shows the ratio of drum rotation to lye flow in the case of a structure embossed from the outside to the inside on the basis of a section running through the drum casing along the circumferential direction, FIG.
Fig. 3 Trommeldrehung und Laugenfluss entsprechend Fig. 2 bei einer von innen nach außen geprägten Struktur,FIG. 3 Drum rotation and liquor flow according to FIG. 2 in the case of a structure stamped from the inside to the outside, FIG.
Fig. 4 einen Abschnitt eines Trommelmantels vor dem Rollen zu einem Zylinder mit Prägungen in einem Verhältnis von Breite (Abmessung pa- rallel zur Trommelachse) zur Länge (Abmessung in Umfangsrichtung) der rechteckigen Grundfläche von 2 : 1 bei der Verteilung von drei Reihen von Prägungen auf der gesamten Breite des Trommelmantels,Fig. 4 shows a portion of a drum shell prior to rolling into a cylinder having embossments in a ratio of width (dimension parallel to the drum axis) to length (dimension in the circumferential direction) of the rectangular base of 2: 1 in the distribution of three rows of embossments on the entire width of the drum shell,
Fig. 5 einen Abschnitt gemäß Fig. 4 mit einem Seitenverhältnis von 4 : 1 und ebenfalls drei Reihen von Prägungen, Fig. 6 einen Abschnitt gemäß Fig. 4 mit einem Seitenverhältnis von 2 : 1 und sechs Reihen von Prägungen,5 shows a section according to FIG. 4 with an aspect ratio of 4: 1 and also three rows of embossings, FIG. 6 shows a section according to FIG. 4 with an aspect ratio of 2: 1 and six rows of embossings, FIG.
Fig. 7 einen Abschnitt gemäß Fig. 4, bei dem die nebeneinander liegendenFig. 7 shows a portion of FIG. 4, in which the juxtaposed
Prägungen zueinander um eine halbe Länge versetzt sind, Fig. 8 einen Abschnitt gemäß Fig. 5, bei dem die nebeneinander liegendenEmbossments are offset by half a length to each other, Fig. 8 shows a portion of FIG. 5, in which the juxtaposed
Prägungen zueinander um eine halbe Länge versetzt sind,Embossments are offset from each other by half a length,
Fig. 9 einen Abschnitt gemäß Fig. 7, bei dem die nebeneinander liegendenFig. 9 shows a portion of FIG. 7, in which the juxtaposed
Prägungen zueinander um eine halbe Länge versetzt sind, undEmbossments are offset from each other by half a length, and
Fig. 10 einen Abschnitt gemäß Fig. 6, bei dem Prägungen mit unterschiedli- chen Seitenverhältnissen gemischt angeordnet sind.10 shows a section according to FIG. 6, in which embossings with different aspect ratios are mixed.
[00010] Die in Fig. 1 dargestellte Wäschetrommel 1 ist außerhalb der zugeordneten Wäschebehandlungsmaschine isoliert dargestellt, in der sie um eine Achse 1 rotieren könnte, und enthält eine Bodenscheibe 3, mit der die Trommel mittels eines Trommel- sterns 4 in der Wäschebehandlungsmaschine befestigt sein kann. Der Trommelmantel 5 ist in bekannter Weise an der Bodenscheibe 3 befestigt und trägt drei umlaufende Reihen von Prägungen 6. Da am Trommelmantel 5 keine Flutlöcher zu sehen sind, könnte diese Trommel für eine Wäschebehandlungsmaschine vorgesehen sein, deren Behandlungsprozesse nicht mit Flüssigkeit durchgeführt werden. Die gestrichelten Bö- gen 7 kennzeichnen eine Umfangslinie der Trommel.The laundry drum 1 shown in FIG. 1 is shown in isolation outside the associated laundry treatment machine, in which it could rotate about an axis 1, and contains a bottom disk 3 with which the drum can be fastened by means of a drum star 4 in the laundry treatment machine can. The drum shell 5 is fixed in a known manner to the bottom plate 3 and carries three circumferential rows of coins 6. Since the drum shell 5 no flood holes can be seen, this drum could be provided for a laundry treatment machine whose treatment processes are not performed with liquid. The dashed lines 7 denote a circumferential line of the drum.
[0010] Entlang einer solchen Umfangslinie 7 verlaufen die in Fig. 2 und 3 dargestellten Schnitte durch den Trommelmantel 5, der in diesen Beispielen für mit Flüssigkeit durchgeführte Wäschebehandlungsprozesse mit Flutlöchern 8 ausgestattet ist, die in den steilen Flanken 10 der prismatischen Prägungen 5 sitzen. Hier sind die Übergänge zwischen den steilen (10) und den flachen Flanken 9 stark verrundet wiedergegeben. Sie können aber auch ähnlich der Darstellung in Fig. 1 scharfkantiger sein. Bei der Drehrichtung 11 der Trommel schöpfen die nach innen gerichteten Prägungen 6 durch ihre Flutlöcher 8 eine große Menge Wasser (Pfeile 12). In Gegendrehrichtung der Trommel entweicht hier wieder Wasser - in dann geringerer Menge bei normaler Be- handlungsgeschwindigkeit, in erheblicher Menge jedoch bei Schleudergeschwindigkeit (gegen Pfeilrichtung 12). Die Prägungen 5 haben auch Seitenflächen 25, die wenigsten annähernd senkrecht auch dem Trommelmantel 5 stehen. In Fig. 2 ist eine dieser Seitenflächen 25 einer Prägung 5 durch eine gerasterte Fläche dargestellt.Along such a circumferential line 7, the sections shown in Fig. 2 and 3 pass through the drum shell 5, which is equipped in these examples of liquid performed laundry treatment processes with flood holes 8, sitting in the steep flanks 10 of the prismatic embossing 5. Here, the transitions between the steep (10) and the flat flanks 9 are reproduced heavily rounded. However, they can also be sharp-edged, similar to the representation in FIG. In the direction of rotation 11 of the drum draw the inward embossments 6 through their flood holes 8 a large amount of water (arrows 12). In reverse direction of the drum, water escapes again - then in lower amount at normal treatment speed, but in significant amount at spin speed (against arrow 12). The embossings 5 also have side surfaces 25 which are at least approximately perpendicular to the drum shell 5. In Fig. 2, one of these side surfaces 25 of an embossing 5 is represented by a rasterized surface.
[0011] Bei der in Fig. 3 dargestellten Trommel, deren Prägungen 5 nach außen ge- stellt sind, kehren sich die Verhältnisse von Trommeldrehung 11 und Wasserströmung 12 um.[0011] In the drum shown in FIG. 3, whose embossings 5 are set outward, the conditions of drum rotation 11 and water flow 12 are reversed.
[0012] Der in Fig. 4 dargestellte Trommelmantel-Abschnitt zeigt Prägungen 13 mit einem Verhältnis der Kantenlängen seiner rechteckigen Grundfläche von 2 : 1 , entsprechend der Breite 14 (parallel zur Trommelachse 2) zur Länge 15 (in Umfangsrichtung). Von den Prägungen 13 dieser Größe haben nur drei Reihen auf der Trommelmantelbreite M nebeneinander Platz.The drum shell section shown in Fig. 4 shows coins 13 with a ratio of the edge lengths of its rectangular base of 2: 1, corresponding to the width 14 (parallel to the drum axis 2) to the length 15 (in the circumferential direction). Of the embossments 13 of this size, only three rows on the drum shell width M side by side space.
[0013] Der Abschnitt in Fig. 5 hat ebenfalls Prägungen 16 der Breite 14. Sie sind gegenüber den Prägungen 13 in Fig. 4 aber nur halb so lang (Länge 17). Daher ist ihr Seitenverhältnis 4 bis 5 : 1. Von dieser Form der Prägungen 16 gehen ebenfalls drei Reihen auf die Breite M des Trommelmantels 5.The section in Fig. 5 also has embossings 16 of the width 14. They are compared to the embossments 13 in Fig. 4 but only half as long (length 17). Therefore, their aspect ratio is 4 to 5: 1. From this shape of the embossments 16 also go three rows on the width M of the drum shell. 5
[0014] Sechs Reihen von Prägungen 18 gehen auf die Breite M des Trommelmantels 5 in Fig. 6; den diese haben zwar ebenfalls die Länge 17 wie in Fig. 5 aber eine Breite 19, die nur halb so groß ist wie die in Fig. 4 und 5. Daher ist das Seitenverhältnis - wie in Fig. 4 - 2 : 1. Darüber hinaus sind auch Prägungen möglich, deren Breite und Länge mindestens nahezu übereinstimmen. Bei genügend kleinen Breiten kann man sogar zwölf und mehr Reihen von Prägungen im Trommelmantel 5 unterbringen.Six rows of embossments 18 go to the width M of the drum shell 5 in Fig. 6; Although these also have the length 17 as in Fig. 5 but a width 19, which is only half as large as that in Fig. 4 and 5. Therefore, the aspect ratio - as in Fig. 4 - 2: 1. In addition are also embossments possible whose width and length at least nearly match. With enough small widths, you can even accommodate twelve or more rows of imprints in the drum shell 5.
[0015] Beim Rollen eines Trommelmantel-Bandes der Beispiele gemäß Fig. 4 bis 6 wird es, wenn man nicht besondere Vorkehrungen dagegen trifft, voraussichtlich zu Knicken im Trommelmantel 5 kommen, die genau an den Zwischenräumen zwischen zwei aufeinander folgenden Prägungen einer Reihe auftreten werden. Um diese Gefahr abzumildern bzw. gänzlich zu beseitigen, wählt man möglichst kleine Prägungen - daher viele nebeneinander - und versetzt sie von Reihe zu Reihe. Hierfür sind die Beispiele in Fig. 7 bis 9 geeignet, die ansonsten dieselben Merkmale aufweisen wie die Beispiel der Fig. 4 bis 6. In den Beispielen der Fig. 7 bis 9 ist der Versatz, z. B. 0,5 x 15, eine halbe Prägungslänge 15 bzw. 17. Man kann den Versatz aber auch kleiner wählen, z. B. ein Drittel der Länge 15, wenn drei Reihen auf der Mantelbreite M Platz haben, oder ein sechstel, wenn sechs Reihen auf der Mantelbreite M Platz haben. Der Bruchteil der Länge muss jedoch keine Proportionalität zur Zahl der Reihen aufweisen. Je kleiner der Versatz zwischen den Reihen ist, desto geringer wird die Neigung zur Kni- ckung des Trommelmantels 5 beim Formen des Zylinders.When rolling a drum sheath band of the examples of FIG. 4 to 6, it is, unless you take special precautions against it, expected to buckling in the drum shell 5, which will occur exactly at the spaces between two consecutive imprints of a series , To mitigate this danger or to eliminate it altogether, one chooses the smallest possible imprints - therefore many side by side - and moves them from row to row. For this purpose, the examples in FIGS. 7 to 9 are suitable, which otherwise have the same features as the example of FIGS. 4 to 6. In the examples of FIGS. 7 to 9, the offset, e.g. B. 0.5 x 15, a half embossed length 15 or 17. You can also choose the offset smaller, z. B. one-third of the length 15, if three rows on the mantle width M space, or a sixth, if six rows on the mantle width M space. However, the fraction of the length does not have to be proportional to the number of rows. The smaller the offset between the rows, the lower the tendency for the drum shell 5 to buckle during the molding of the cylinder.
[0016] Beim Beispiel der Fig. 10 ist zwar kein Versatz der Reihen gegeneinander möglich, jedoch kann die Knickungsneigung auch durch genügend kleine Längen 21 der Prägungen 20 und 22 vermindert werden. Das Beispiel der Fig. 10 zeichnet sich aber noch durch eine weitere Besonderheit aus: Die Prägungen sind nicht alle gleich breit. Die Prägungen 20 haben gegenüber ihrer Länge 21 eine doppelt so große Breite 19. Dazwischen sind aber immer wieder Prägungen 22 angeordnet, deren Breite 14 das Vierfache ihrer Länge 21 beträgt. Die zusätzliche Besonderheit in diesem Beispiel ist, dass diese breiteren Prägungen 22 ebenfalls regelmäßig so angeordnet sind, dass beim Drehen der Trommel die auf ihrer Innenseite sich entlang wälzende Wäsche in Richtung des regelmäßigen Versatzes der zusätzlichen Prägungen 22 in Parallelrichtung zur Trommelachse bewegt wird. Zur Verdeutlichung dieses regelmäßigen Versatzes ist eine (sich schräg über die Reihen erstreckende) Folge von Prägungen 22 gerastert dargestellt. Dies kann man dazu ausnutzen, die Wäsche bevorzugt gegen die Trommelöffnung oder gegen den Trommelboden hin zu bewegen. [0017] Selbstverständlich sind auch andere Kombinationen von Prägungen unterschiedlicher Abmessungen und Proportionen möglich. Dabei sind auch Mischungen unterschiedlichster Prägungen möglich, die einen Versatz in Umfangsrichtung wie auch eine sich schräg über die Reihen erstreckende Folge von gleichartigen Prägungen zulassen. Auch durch Mischungen von Prägungen, die in unterschiedliche Richtungen gestellt sind, lassen sich vorteilhafte Effekte erzielen. So können beispielsweise inAlthough no offset of the rows against each other is possible in the example of FIG. 10, but the tendency to buckling can be reduced by sufficiently small lengths 21 of the embossments 20 and 22. The example of FIG. 10, however, is characterized by another peculiarity: The imprints are not all the same width. In contrast to their length 21, the embossings 20 have twice the width 19. In between, however, embossments 22 are repeatedly arranged whose width 14 is four times their length 21. The additional peculiarity in this example is that these wider embossments 22 are also regularly arranged so that, as the drum rotates, the laundry rolling on its inside is moved in the direction of the regular displacement of the additional embossments 22 in the direction parallel to the drum axis. To illustrate this regular offset a (extending obliquely over the rows) sequence of imprints 22 is shown rasterized. This can be exploited to move the laundry preferably against the drum opening or towards the drum bottom. Of course, other combinations of imprints of different dimensions and proportions are possible. In this case, mixtures of different embossments are possible, which allow an offset in the circumferential direction as well as an obliquely extending over the series sequence of similar imprints. Even by mixtures of embossments which are placed in different directions, advantageous effects can be achieved. For example, in
Kombination von unterschiedlichen anderweitigen Ausprägungen des Trommelmantels, z. B. durch unterschiedlich geformte Wäschemitnehmer, in bestimmten Trommelmantel- Bereichen unterschiedliche mechanische Einwirkungen erzielt werden, die durch jeweils unterschiedliche Trommeldrehrichtungen noch unterstützt werden können. Combination of different other forms of the drum shell, z. B. by differently shaped Wäschemitnehmer, different mechanical effects are achieved in certain drum shell areas that can be supported by each different drum rotation directions.

Claims

Pate nta ns p rü ch e Pate nta ns p re ch e
1. Trommel (1 ) für eine Wäschebehandlungsmaschine, wobei die Trommel inner- halb eines Gehäuses der Wäschebehandlungsmaschine drehbar gelagert ist und mindestens eine Bodenscheibe (3) sowie einen Mantel (5) aufweist, die einzeln oder beide mit einer Wölbstruktur versehen sind, dadurch gekennzeichnet, dass die Wölbstruktur aus mindestens zwei die Trommel (1 ) wenigstens teilweise umfassenden Reihen von prismenartigen Prägungen (6) mit einer im Wesentlichen rechteckigen Grundfläche besteht, von den die eine in Um- fangsrichtung (7) der Trommel (1 ) gerichtete Fläche (10) in einem steilen Winkel, die entgegen gerichtete Fläche (9) in einem flachen Winkel und von denen die Seitenflächen (25) in einem wenigstens nahezu rechten Winkel zum Mantel (5) stehen.1. Drum (1) for a laundry treatment machine, wherein the drum is rotatably mounted within a housing of the laundry treating machine and at least one bottom disc (3) and a jacket (5), which are provided individually or both with a bulge structure, characterized in that the arching structure consists of at least two rows of prism-like embossings (6) at least partially enclosing the drum (1) with a substantially rectangular base surface, of which the one surface (10) directed in the circumferential direction (7) of the drum (1) ) at a steep angle, the oppositely directed surface (9) at a shallow angle and of which the side surfaces (25) are at at least approximately at right angles to the jacket (5).
2. Trommel nach Anspruch 1 , dadurch gekennzeichnet, dass die Prägungen (6) eine auf der Außenseite des Mantels (5) sich aufwölbende Struktur bilden.2. Drum according to claim 1, characterized in that the embossings (6) on the outside of the jacket (5) form a bulging structure.
3. Trommel nach Anspruch 1 , dadurch gekennzeichnet, dass die Prägungen (6) eine auf der Innenseite des Mantels (5) sich aufwölbende Struktur bilden.3. Drum according to claim 1, characterized in that the embossings (6) form a on the inside of the jacket (5) bulging structure.
4. Trommel für eine Flüssigkeit führende Wäschebehandlungsmaschine nach An- spruch 2 oder 3, dadurch gekennzeichnet, dass die im steilen Winkel auf dem4. drum for a liquid leading laundry treating machine according to claim 2 or 3, characterized in that the steep angle on the
Mantel (5) stehende Fläche (10) der Prägung (6) Flutlöcher (8) enthält.Sheath (5) standing surface (10) of the embossing (6) contains flood holes (8).
5. Trommel nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Breite (14) der rechteckigen Grundfläche etwa ihrer Länge (15) entspricht.5. Drum according to one of the preceding claims, characterized in that the width (14) of the rectangular base corresponds approximately to its length (15).
6. Trommel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Breite (14, 19) der rechteckigen Grundfläche etwa ihrer doppelten (15, 17) Länge entspricht. 6. Drum according to one of claims 1 to 4, characterized in that the width (14, 19) of the rectangular base corresponds approximately to its double (15, 17) length.
7. Trommel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Breite (15) der rechteckigen Grundfläche etwa ihrer vier- bis fünffachen Länge (17) entspricht.7. Drum according to one of claims 1 to 4, characterized in that the width (15) of the rectangular base corresponds approximately to their four to five times the length (17).
8. Trommel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass auf der Breite (M) des Mantels (5) je nach Breite (14, 19) der Grundfläche drei bis zwölf Reihen von Prägungen (6, 16, 18, 20, 22) angeordnet sind.8. Drum according to one of claims 1 to 4, characterized in that on the width (M) of the jacket (5) depending on the width (14, 19) of the base three to twelve rows of embossments (6, 16, 18, 20 , 22) are arranged.
9. Trommel nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Reihen am Trommelumfang so angeordnet sind, dass nebeneinander stehende Prägungen (Fig. 4 bis 6 und 10) miteinander fluchten.9. Drum according to one of the preceding claims, characterized in that the rows are arranged on the circumference of the drum so that adjacent imprints (Fig. 4 to 6 and 10) are aligned.
10. Trommel nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Reihen am Trommelumfang so angeordnet sind, dass nebeneinander stehende Prägungen (Fig. 7 bis 9) zueinander einen Versatz (0,5x15; 0,5x17) aufweisen. 10. Drum according to one of claims 1 to 8, characterized in that the rows are arranged on the circumference of the drum so that juxtaposed imprints (Fig. 7 to 9) to each other an offset (0.5x15, 0.5x17) have.
EP09702635A 2008-01-16 2009-01-02 Drum for a laundry treatment machine Active EP2238284B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008004661A DE102008004661A1 (en) 2008-01-16 2008-01-16 Drum for a laundry treatment machine
PCT/EP2009/050002 WO2009090107A1 (en) 2008-01-16 2009-01-02 Drum for a laundry treatment machine

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EP2238284A1 true EP2238284A1 (en) 2010-10-13
EP2238284B1 EP2238284B1 (en) 2011-05-18

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US (1) US8752404B2 (en)
EP (1) EP2238284B1 (en)
CN (1) CN101910499B (en)
AT (1) ATE510060T1 (en)
DE (1) DE102008004661A1 (en)
EA (1) EA017063B1 (en)
WO (1) WO2009090107A1 (en)

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DE102006010179A1 (en) * 2005-12-28 2007-07-05 BSH Bosch und Siemens Hausgeräte GmbH Drum with a horizontal axis for a washing machine or tumbler drier has drop-shaped surface bulges with only one axis of symmetry in the circumferential direction
EP2325367A1 (en) 2009-11-20 2011-05-25 Vestel Beyaz Esya Sanayi Ve Ticaret A.S. A drum for washing machines and tumble dryers
JP5479277B2 (en) * 2010-09-01 2014-04-23 パナソニック株式会社 Dehydrator
DE102011083015B4 (en) * 2011-09-20 2019-08-14 BSH Hausgeräte GmbH Laundry drum with drum profile for optimized spin effect
DE102013201186A1 (en) * 2013-01-25 2014-07-31 BSH Bosch und Siemens Hausgeräte GmbH Laundry drum for laundry treatment machine e.g. laundry machine, has intense stiffener for adjusting depth and size of embossments arranged in regions of mechanical loads of drum cladding towards longitudinal axis of drum cladding
US10036113B2 (en) 2013-07-22 2018-07-31 Whirlpool Corporation Laundry treating appliance with embossed container
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US20110048080A1 (en) 2011-03-03
EA201070845A1 (en) 2011-02-28
WO2009090107A1 (en) 2009-07-23
ATE510060T1 (en) 2011-06-15
US8752404B2 (en) 2014-06-17
EA017063B1 (en) 2012-09-28
CN101910499A (en) 2010-12-08
DE102008004661A1 (en) 2009-07-23
CN101910499B (en) 2012-07-25
EP2238284B1 (en) 2011-05-18

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