EP2145992B1 - Laundry drum for a washing processing machine - Google Patents

Laundry drum for a washing processing machine Download PDF

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Publication number
EP2145992B1
EP2145992B1 EP09165476.4A EP09165476A EP2145992B1 EP 2145992 B1 EP2145992 B1 EP 2145992B1 EP 09165476 A EP09165476 A EP 09165476A EP 2145992 B1 EP2145992 B1 EP 2145992B1
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EP
European Patent Office
Prior art keywords
laundry drum
laundry
drum according
protrusions
drum
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Not-in-force
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EP09165476.4A
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German (de)
French (fr)
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EP2145992A1 (en
Inventor
Johannes Geyer
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP2145992A1 publication Critical patent/EP2145992A1/en
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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 that rise from the cylindrical shape of the mounted in the laundry drum drum shell (see DE-A-23 63 935 ).
  • Such a laundry drum is off DE 44 37 986 A1 known.
  • structures in the jacket sheet of a laundry drum in the form of staggered quadrangular or hexagonal arch surfaces are shown therein.
  • Such structures have been used in laundry drums mainly because they give the structured jacket sheet on the one hand a certain dimensional stability, which affects above all in a reduced acoustic tendency to oscillate.
  • such a structure also has a certain decorative effect.
  • a previously suspected beneficial effect on the mechanical laundry treatment could not be demonstrated in this type of structure.
  • the invention has for its object to find a casing sheet structure for a laundry drum described above, on the one hand has the advantageous properties of structures of the prior art, but also provides the basics for their formation to favorably influence the mechanical laundry treatment during the rotation of the drum.
  • structures are required, in addition to the strength-forming effect exert a certain frictional effect on the laundry, which enables the rotation of the laundry drum to take along the laundry parts over the largest possible angle of rotation.
  • each structure of a line-shaped elevation which is closed in itself, consists, and within the annular closed, linear elevations concentric, lenticular elevations are arranged.
  • projections can in many ways form such that they have a beneficial effect on the frictional effect on the laundry during drum rotation. Since they also stabilize the drum shell to the extent that the material used for the drum plate is reduced to a minimum, that no acoustic oscillation tendencies are to be feared and that the surface properties of such a shaped lateral surface for the laundry treatment are almost ideal, a laundry drum formed according to the invention is an optimum represent the use in the laundry treatment.
  • Such elevations may be arranged in a more or less regular distribution on the drum shell.
  • the stiffening of the drum shell resulting from the provision of the structures according to the invention has the additional advantageous effect that the tendency of the drum shell to form acoustic resonances and a resulting roar is reduced, if it caused by the laundry under normal use or in particular by the drive motor noise from the inside of a laundry treatment machine to which the laundry drum belongs is charged.
  • the annular closed, linear elevations can be arranged in rows, which are oriented in the circumferential direction.
  • the elevations may follow straight rows that extend at least partially parallel or not parallel to each other and / or to the circumferential direction of the drum.
  • the rows may be circumferentially closed or interrupted. They may have equal or unequal distances to each other and may be the same or at least partially unequal or different in width. You can wave lines, z. B. sine waves, zigzag lines or helices follow and in relation to the axial direction of the drum seen in phase with each other or offset from each other.
  • the elevations of a row can be the same size and have a different series of different diameter. Even within a row, the diameters of the surveys may differ.
  • the annularly closed, linear elevations can be circular or elliptical.
  • the drum shell has in particular no holes for the passage of fluid.
  • Fig. 1 is shown as a laundry treatment machine, a laundry drying machine whose mounted on the front side 1 feed opening 2 with the door removed gives an insight into the interior of the laundry drum 3. It has a cylindrical drum shell 4, on the inside of several Wäschemit Meeting 5 are evenly distributed. In addition, the drum shell 4 has inwardly rows 6 of annular bulged elevations, which will be explained in more detail with reference to the following figures. Since Wäschemit Meeting 5 like to be kept flat in drying machines, these surveys on the one hand ensure that a particularly gentle surface texture is achieved, which nevertheless generates an increased friction effect to the laundry out, which despite the flat driver lifted the laundry at the drum rotation very far up from where it can fall freely through the dry air flow in the laundry drum. In addition, the surveys help to form the drum shell mechanically stiff, which otherwise fail to fear acoustic interference. On the other hand can be saved by lower wall thicknesses of the drum shell 4 by the considerable gain in rigidity material.
  • rows 6 of annular ridges 8 may be made according to FIG Fig. 1 seen in cross section of the sheet of such a drum shell 4 a in Fig. 2 or 3 take the form shown.
  • the elevation 8 gradually swings inward from the cylindrical shape of the region 7 of the drum shell 4, forms an annular ridge line with a diameter D and also swings softly back into the cylindrical shape of the region 7.
  • the remaining in the cylindrical shape areas 7 are closed in a laundry drying machine that does not require liquid exchange for the treatment process, ie they have no flood holes.
  • the distances A of the symmetry lines of the elevations 8 in FIGS. 2 and 3 equal to each other. These distances can also be unequal in size. This may play a role in such treatment processes where the laundry within the drum is unevenly distributed during its rotation.
  • Fig. 3 is a variant too Fig. 2 shown in the present invention within each annular elevation 8, a concentric lenticular elevation 9 with a diameter d - hereinafter referred to briefly as lens 9 - embossed into the cylindrical surface 7 of the laundry drum is.
  • lens 9 - embossed into the cylindrical surface 7 of the laundry drum is.
  • Fig. 4 has the drum shell 4 according to the invention on its inner side rows 6 of annular elevations 8 with lenses 9, which wrap around the drum shell in the circumferential direction 10 in a closed circle.
  • the rows 6 in the circumferential direction 10 may also have a limited length, for example in that an elevation 8 is omitted at regular intervals (eg every fifth elevation 8) or at irregular intervals.
  • the rows are shown at regular intervals A.
  • adjacent rows can also be arranged at unequal distances A. It is conceivable, for example, that the rows 6 are more closely spaced in the vicinity of the drum bases of a laundry drum than in the center of the drum.
  • the surveys must also not according to Fig. 4 be circular; their basic form can also be that of an ellipse.
  • the rows 6 also need not necessarily be parallel to the sidelines of the drum shell 4. There may be reasons for the rows 6 to wrap helically around the circumferential direction 10. Likewise, there may be reasons why rows 6 are odd. For example, alignments of the rows 6 in waveform or in zigzag lines are possible.
  • the values of the height H of the annular elevations 8 and of the lenses 9 can also be shaped. They can also be unequal in direct comparison. For example, it can be argued that the value of the height of the lens 9 is greater than the value of the height H of the annular elevation eighth
  • the values of the height H of the annular elevations 8 and / or 9 with each other may differ.
  • this slope can suddenly fall back to the initial value. This creates a discontinuity that leads in one drum rotation to a gentle laundry treatment, but in the other direction of rotation to a more intense treatment, if desired. Otherwise, however, regardless of the direction of rotation control of the laundry drum 3, the value of the height H alternately rise and fall steadily.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (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 aus der Zylinderform des in der Wäschetrommel angebrachten Trommelmantels erheben (siehe DE-A-23 63 935 ).The invention relates to a laundry drum for a laundry treatment machine with a drum shell having circumferentially distributed structures that rise from the cylindrical shape of the mounted in the laundry drum drum shell (see DE-A-23 63 935 ).

Eine derartige Wäschetrommel ist aus DE 44 37 986 A1 bekannt. Darin werden vor allem Strukturen im Mantelblech einer Wäschetrommel in Form von gegeneinander versetzten viereckigen oder sechseckigen Wölbflächen gezeigt. Solche Strukturen sind bei Wäschetrommeln vorwiegend deshalb zur Anwendung gekommen, weil sie einerseits dem strukturierten Mantelblech eine gewisse Formstabilität verleihen, die sich vor allem in einer geminderten akustischen Schwingneigung auswirkt. Andererseits hat aber eine solche Struktur auch eine gewisse dekorative Wirkung. Ein einmal vermuteter vorteilhafter Einfluss auf die mechanische Wäschebehandlung konnte dagegen bei dieser Art der Struktur nicht nachgewiesen werden.Such a laundry drum is off DE 44 37 986 A1 known. In particular, structures in the jacket sheet of a laundry drum in the form of staggered quadrangular or hexagonal arch surfaces are shown therein. Such structures have been used in laundry drums mainly because they give the structured jacket sheet on the one hand a certain dimensional stability, which affects above all in a reduced acoustic tendency to oscillate. On the other hand, such a structure also has a certain decorative effect. On the other hand, a previously suspected beneficial effect on the mechanical laundry treatment could not be demonstrated in this type of structure.

Eine aus WO 2004/072354 A1 bekannte Wäschetrommel enthält ebenfalls am Trommelboden und in Umfangsrichtung am Trommelmantel verteilte Erhebungen, die die mechanische Wäschebehandlung ebenfalls vorteilhaft beeinflussen soll. Ihre Mitnahmewirkung des Trommelmantels auf die Wäscheteile wird jedoch begrenzt sein, weil die Erhebungen uneinheitlich ausgerichtet sind und weil keine Klarheit hinsichtlich der Formung der Erhebungen besteht. Außerdem dürfte ihr Trommelmantel in gleichbleibender Qualität schwierig zu fertigen sein, weil die unregelmäßige Formung, Anordnung und Ausrichtung der Erhebungen aufgrund unvorhersehbarer Materialzüge und -dehnungen während des Prägens der Erhebungen zum Verziehen des Trommelmantelblechs führen.One out WO 2004/072354 A1 Known laundry drum also contains on the drum base and circumferentially distributed on the drum shell surveys, which should also affect the mechanical laundry treatment advantageous. Your entrainment effect of the drum shell on the laundry parts will be limited, however, because the surveys are unevenly aligned and because there is no clarity regarding the formation of the surveys. In addition, their drum casing is expected to be difficult to manufacture with consistent quality because of the irregular shaping, location and orientation of the bumps due to unpredictable material pulls and strains during embossing of the bumps resulting in distortion of the drum shell sheet.

Eine aus DE 23 63 935 A1 bekannte Wäschetrommel weist einen Mantel auf, an dem in gleichen Abständen in das Trommelinnere weisende Wäschemitnehmer befestigt und in den dazwischen liegenden Bereichen Flutlöcher vorgesehen sind, und bei dem in den die Flutlöcher aufweisenden Bereichen nicht gelochte, als Griffe dienende Erhebungen oder Vertiefungen vorgesehen sind. Diese Erhebungen oder Vertiefungen können als Griffmulden ausgestaltet und durch Prägung erzeugt sein.One out DE 23 63 935 A1 Known laundry drum has a jacket attached to the at the same distances in the drum interior laundry lighters and provided in the intermediate areas flood holes, and in which the flood holes having areas not perforated, serving as handles surveys or depressions are provided. These elevations or depressions can be configured as recessed grips and produced by embossing.

Der Erfindung liegt die Aufgabe zugrunde, für eine eingangs beschriebene Wäschetrommel eine Mantelblechstruktur zu finden, die einerseits die vorteilhaften Eigenschaften von Strukturen des Standes der Technik aufweist, zusätzlich aber auch Grundlagen schafft für deren Ausbildung zur vorteilhaften Beeinflussung der mechanischen Wäschebehandlung während der Drehbewegung der Trommel. Insbesondere sind Strukturen gefragt, die neben der Festigkeit bildenden Wirkung eine gewisse Reibwirkung auf die Wäsche ausüben, die bei der Drehung der Wäschetrommel zum Mitnehmen der Wäscheteile über einen möglichst großen Drehwinkel befähigt.The invention has for its object to find a casing sheet structure for a laundry drum described above, on the one hand has the advantageous properties of structures of the prior art, but also provides the basics for their formation to favorably influence the mechanical laundry treatment during the rotation of the drum. In particular, structures are required, in addition to the strength-forming effect exert a certain frictional effect on the laundry, which enables the rotation of the laundry drum to take along the laundry parts over the largest possible angle of rotation.

Erfindungsgemäß wird diese Aufgabe durch das Kennzeichen des Anspruches 1 in der Weise gelöst, dass jede Struktur aus einer linienförmigen Erhebung, die ringförmig in sich geschlossen ist, besteht, und innerhalb der ringförmig geschlossenen, linienförmigen Erhebungen konzentrische, linsenförmige Erhebungen angeordnet sind. Solche Erhebungen lassen sich nämlich - wie nachstehend noch erläutert werden wird - in vielerlei Hinsicht so ausbilden, dass sie während der Trommelrotation einen vorteilhaften Einfluss auf die Reibungswirkung gegenüber der Wäsche haben. Da sie den Trommelmantel außerdem insoweit stabilisieren, dass der Materialeinsatz für das Trommelblech auf ein Minimum reduzierbar ist, dass keine akustischen Schwingneigungen zu befürchten sind und dass die Oberflächeneigenschaften einer solchermaßen geformten Mantelfläche für die Wäschebehandlung geradezu ideal sind, wird eine erfindungsgemäß ausgebildete Wäschetrommel ein Optimum für den Einsatz in der Wäschebehandlung darstellen. Solche Erhebungen können in mehr oder weniger regelmäßiger Verteilung auf dem Trommelmantel angeordnet sein.According to the invention, this object is achieved by the characterizing part of claim 1 in such a way that each structure of a line-shaped elevation, which is closed in itself, consists, and within the annular closed, linear elevations concentric, lenticular elevations are arranged. In fact, such projections, as will be explained below, can in many ways form such that they have a beneficial effect on the frictional effect on the laundry during drum rotation. Since they also stabilize the drum shell to the extent that the material used for the drum plate is reduced to a minimum, that no acoustic oscillation tendencies are to be feared and that the surface properties of such a shaped lateral surface for the laundry treatment are almost ideal, a laundry drum formed according to the invention is an optimum represent the use in the laundry treatment. Such elevations may be arranged in a more or less regular distribution on the drum shell.

Die aus dem Vorsehen der erfindungsgemäßen Strukturen resultierende Versteifung des Trommelmantels hat den zusätzlichen vorteilhaften Effekt, dass die Neigung des Trommelmantels zur Ausbildung akustischer Resonanzen und einem daraus resultierenden Dröhnen reduziert ist, wenn er durch die bei bestimmungsgemäßem Betrieb darin umherfallende Wäsche oder insbesondere vom Antriebsmotor verursachte Geräusche aus dem Inneren einer Wäschebehandlungsmaschine, zu der die Wäschetrommel gehört, belastet wird.The stiffening of the drum shell resulting from the provision of the structures according to the invention has the additional advantageous effect that the tendency of the drum shell to form acoustic resonances and a resulting roar is reduced, if it caused by the laundry under normal use or in particular by the drive motor noise from the inside of a laundry treatment machine to which the laundry drum belongs is charged.

Vorteilhafte Weiterbildungen der erfindungsgemäßen Wäschetrommel sind in den Unteransprüchen angegeben. Deren Merkmale können einzeln oder in jeder beliebigen Kombination untereinander und mit den Merkmalen des Anspruches 1 angewendet werden, ohne den Rahmen der Erfindung zu verlassen.Advantageous developments of the laundry drum according to the invention are specified in the subclaims. Their features can be used individually or in any combination with each other and with the features of claim 1, without departing from the scope of the invention.

Vorteilhafterweise können die ringförmig geschlossenen, linienförmigen Erhebungen in Reihen angeordnet sein, die in Umfangsrichtung orientiert sind. So können die Erhebungen geraden Reihen folgen, die wenigstens partiell parallel oder nicht parallel zueinander und/oder zur Umfangsrichtung der Trommel sich erstrecken. Die Reihen können in Umfangsrichtung geschlossen oder unterbrochen sein. Sie können zueinander gleiche oder ungleiche Abstände haben und gleich oder wenigstens teilweise ungleich oder unterschiedlich breit sein. Sie können Wellenlinien, z. B. Sinuswellen, Zick-Zack-Linien oder Schraubenlinien folgen und in Bezug auf die Achsrichtung der Trommel gesehen zueinander gleichphasig oder gegeneinander versetzt sein. Auch können die Erhebungen einer Reihe gleich groß sein und die einer anderen Reihe davon abweichende Durchmesser aufweisen. Auch innerhalb einer Reihe können die Durchmesser der Erhebungen voneinander abweichen. Die ringförmig geschlossenen, linienförmigen Erhebungen können kreisrund oder elliptisch sein. Der Trommelmantel weist insbesondere keine Löcher zum Durchtritt von Fluid auf. Damit ist die Anwendung der Erfindung in einer Wäschebehandlungsmaschine in Form eines Wäschetrockners erschlossen.Advantageously, the annular closed, linear elevations can be arranged in rows, which are oriented in the circumferential direction. Thus, the elevations may follow straight rows that extend at least partially parallel or not parallel to each other and / or to the circumferential direction of the drum. The rows may be circumferentially closed or interrupted. They may have equal or unequal distances to each other and may be the same or at least partially unequal or different in width. You can wave lines, z. B. sine waves, zigzag lines or helices follow and in relation to the axial direction of the drum seen in phase with each other or offset from each other. Also, the elevations of a row can be the same size and have a different series of different diameter. Even within a row, the diameters of the surveys may differ. The annularly closed, linear elevations can be circular or elliptical. The drum shell has in particular no holes for the passage of fluid. Thus, the application of the invention is developed in a laundry treatment machine in the form of a tumble dryer.

Anhand von in der Zeichnung dargestellten Ausführungsbeispielen wird die Erfindung nachfolgend näher erläutert. Im Einzelnen zeigen

  • Fig. 1 eine perspektivische Ansicht der Frontseite einer Wäschetrockenmaschine, mit freiem Einblick in die Wäschetrommel, deren Mantelblech auf der Innenseite mit reihenförmig angeordneten Erhebungen versehen ist,
  • Fig. 2 einen Querschnitt durch ein Mantelblech parallel zur Achsrichtung der Wäschetrommel mit ringförmigen Erhebungen,
  • Fig. 3 einen Querschnitt wie in Fig. 2 erfindungsgemäß mit zusätzlich konzentrisch zu den ringförmigen Erhebungen angeordneten linsenförmigen Erhebungen und
  • Fig. 4 die Ansicht von Außen auf ein erfindungsgemäßes Mantelblech mit phasengleichen linienförmig angeordneten Reihen von Erhebungen aus Ringen und Linsen.
On the basis of embodiments shown in the drawings, the invention will be explained in more detail below. Show in detail
  • Fig. 1 a perspective view of the front of a laundry drying machine, with free insight into the laundry drum, the jacket plate is provided on the inside with rows arranged elevations,
  • Fig. 2 a cross section through a jacket plate parallel to the axial direction of the laundry drum with annular elevations,
  • Fig. 3 a cross section as in Fig. 2 According to the invention with additionally concentric with the annular elevations arranged lenticular elevations and
  • Fig. 4 the view from the outside on an inventive jacket sheet with in-phase linearly arranged rows of elevations of rings and lenses.

In Fig. 1 ist als eine Wäschebehandlungsmaschine eine Wäschetrockenmaschine dargestellt, deren an der Frontseite 1 angebrachte Beschickungsöffnung 2 bei abgenommener Tür einen Einblick in das Innere der Wäschetrommel 3 gewährt. Sie hat einen zylindrischen Trommelmantel 4, an deren Innenseite mehrere Wäschemitnehmer 5 gleichmäßig verteilt sind. Außerdem hat der Trommelmantel 4 nach innen Reihen 6 von ringförmig ausgewölbten Erhebungen, die anhand der nachfolgenden Figuren noch näher erläutert werden. Da Wäschemitnehmer 5 in Trockenmaschinen gern flach gehalten werden, sorgen diese Erhebungen einerseits dafür, dass eine besonders Wäsche schonende Oberflächengestaltung erzielt wird, die dennoch eine gesteigerte Reibwirkung zur Wäsche hin erzeugt, wodurch trotz der flachen Mitnehmer die Wäsche bei der Trommeldrehung sehr weit nach oben gehoben wird, von wo aus sie frei durch den Trockenluftstrom in der Wäschetrommel fallen kann. Außerdem helfen die Erhebungen, den Trommelmantel mechanisch schwingungssteif auszubilden, wodurch ansonsten zu befürchtende akustische Störungen ausbleiben. Andererseits lässt sich durch den erheblichen Zugewinn an Steifigkeit Material durch geringere Wandstärken des Trommelmantels 4 einsparen.In Fig. 1 is shown as a laundry treatment machine, a laundry drying machine whose mounted on the front side 1 feed opening 2 with the door removed gives an insight into the interior of the laundry drum 3. It has a cylindrical drum shell 4, on the inside of several Wäschemitnehmer 5 are evenly distributed. In addition, the drum shell 4 has inwardly rows 6 of annular bulged elevations, which will be explained in more detail with reference to the following figures. Since Wäschemitnehmer 5 like to be kept flat in drying machines, these surveys on the one hand ensure that a particularly gentle surface texture is achieved, which nevertheless generates an increased friction effect to the laundry out, which despite the flat driver lifted the laundry at the drum rotation very far up from where it can fall freely through the dry air flow in the laundry drum. In addition, the surveys help to form the drum shell mechanically stiff, which otherwise fail to fear acoustic interference. On the other hand can be saved by lower wall thicknesses of the drum shell 4 by the considerable gain in rigidity material.

Beispielweise können Reihen 6 von ringförmigen Erhebungen 8 gemäß Fig. 1 im Querschnitt des Blechs eines solchen Trommelmantels 4 gesehen eine in Fig. 2 oder 3 dargestellte Form annehmen. Dabei schwingt die Erhebung 8 allmählich aus der Zylinderform des Bereichs 7 des Trommelmantels 4 nach innen aus, bildet eine ringförmige Firstlinie mit einem Durchmesser D und schwingt ebenso weich in die Zylinderform des Bereichs 7 zurück. Die in der Zylinderform verbleibenden Bereiche 7 sind bei einer Wäschetrockenmaschine, die zum Behandlungsprozess keinen Flüssigkeitsaustausch benötigt, geschlossen, d. h. sie haben keine Flutlöcher.For example, rows 6 of annular ridges 8 may be made according to FIG Fig. 1 seen in cross section of the sheet of such a drum shell 4 a in Fig. 2 or 3 take the form shown. In this case, the elevation 8 gradually swings inward from the cylindrical shape of the region 7 of the drum shell 4, forms an annular ridge line with a diameter D and also swings softly back into the cylindrical shape of the region 7. The remaining in the cylindrical shape areas 7 are closed in a laundry drying machine that does not require liquid exchange for the treatment process, ie they have no flood holes.

Dabei sind die Abstände A der Symmetrielinien der Erhebungen 8 in Fig. 2 und 3 untereinander gleich groß. Diese Abstände können aber auch ungleich groß sein. Dies kann eine Rolle in solchen Behandlungsprozessen spielen, bei denen sich die Wäsche innerhalb der Trommel während ihrer Rotation ungleichförmig verteilt.The distances A of the symmetry lines of the elevations 8 in FIGS. 2 and 3 equal to each other. These distances can also be unequal in size. This may play a role in such treatment processes where the laundry within the drum is unevenly distributed during its rotation.

In Fig. 3 ist eine Variante zu Fig. 2 dargestellt, bei der erfindungsgemäß innerhalb jeder ringförmigen Erhebung 8 eine konzentrische linsenförmige Erhebung 9 mit einem Durchmesser d - nachfolgend kurz als Linse 9 bezeichnet - in die Zylinderfläche 7 der Wäschetrommel eingeprägt ist. Dadurch ist die Steifigkeit des Trommelmantels noch einmal erhöht und die Reibungswirkung zur Wäsche hin verstärkt.In Fig. 3 is a variant too Fig. 2 shown in the present invention within each annular elevation 8, a concentric lenticular elevation 9 with a diameter d - hereinafter referred to briefly as lens 9 - embossed into the cylindrical surface 7 of the laundry drum is. As a result, the rigidity of the drum shell is increased again and the friction effect reinforced to laundry out.

Gemäß Fig. 4 hat der Trommelmantel 4 erfindungsgemäß an seiner Innenseite Reihen 6 von ringförmigen Erhebungen 8 mit Linsen 9, die in Umfangsrichtung 10 in einem geschlossenen Kreis den Trommelmantel umschlingen. Abweichend davon können die Reihen 6 in Umfangsrichtung 10 auch eine begrenzte Länge haben, beispielsweise dadurch, dass in regelmäßigen Intervallen (z. B. jede fünfte Erhebung 8) oder in unregelmäßigen Intervallen eine Erhebung 8 ausgelassen ist. In Fig. 4 sind die Reihen mit gleichmäßigen Abständen A dargestellt.According to Fig. 4 has the drum shell 4 according to the invention on its inner side rows 6 of annular elevations 8 with lenses 9, which wrap around the drum shell in the circumferential direction 10 in a closed circle. By way of derogation, the rows 6 in the circumferential direction 10 may also have a limited length, for example in that an elevation 8 is omitted at regular intervals (eg every fifth elevation 8) or at irregular intervals. In Fig. 4 the rows are shown at regular intervals A.

Abweichend hiervon können aber benachbarte Reihen auch in ungleichen Abständen A angeordnet sein. Denkbar ist beispielsweise, dass die Reihen 6 in der Nähe der Trommelböden einer Wäschetrommel enger beabstandet sind als in der Trommelmitte. Die Erhebungen müssen auch nicht gemäß Fig. 4 kreisrund sein; ihre Grundform kann auch die einer Ellipse sein.Deviating from this, however, adjacent rows can also be arranged at unequal distances A. It is conceivable, for example, that the rows 6 are more closely spaced in the vicinity of the drum bases of a laundry drum than in the center of the drum. The surveys must also not according to Fig. 4 be circular; their basic form can also be that of an ellipse.

Die Reihen 6 müssen außerdem nicht zwingend parallel zur Seitenlinie des Trommelmantels 4 liegen. Es kann Gründe dafür geben, dass die Reihen 6 sich schraubenförmig um die Umfangsrichtung 10 legen. Ebenso kann es Gründe dafür geben, dass die Reihen 6 ungerade angelegt sind. Beispielsweise sind Ausrichtungen der Reihen 6 in Wellenform oder in Zick-Zack-Linien möglich.The rows 6 also need not necessarily be parallel to the sidelines of the drum shell 4. There may be reasons for the rows 6 to wrap helically around the circumferential direction 10. Likewise, there may be reasons why rows 6 are odd. For example, alignments of the rows 6 in waveform or in zigzag lines are possible.

In gleicher Weise variabel sind auch die Werte der Höhe H der ringförmigen Erhebungen 8 und der Linsen 9 gestaltbar. Sie können im direkten Vergleich auch ungleich hoch sein. Beispielsweise kann es dafür sprechen, dass der Wert der Höhe der Linse 9 größer ist gegenüber dem Wert der Höhe H der ringförmigen Erhebung 8.In the same way, the values of the height H of the annular elevations 8 and of the lenses 9 can also be shaped. They can also be unequal in direct comparison. For example, it can be argued that the value of the height of the lens 9 is greater than the value of the height H of the annular elevation eighth

Aber auch die Werte der Höhe H der ringförmigen Erhebungen 8 und/oder 9 untereinander können differieren. Beispielsweise kann es bei einem wechselnden Drehbetrieb der Wäschetrommel 3 sinnvoll sein, die aufeinander folgenden Erhebungen 8 und/oder 9 einer Reihe 6 mit stetig steigender Höhe gegenüber der Mantelfläche der Wäschetrommel 3 auszustatten. Diese Steigung kann beispielsweise nach einer gewissen Zahl von Erhebungen plötzlich wieder auf den Anfangswert zurückfallen. So entsteht eine Unstetigkeit, die in einer Trommeldrehrichtung zu einer sanften Wäschebehandlung, in der anderen Drehrichtung aber zu einer intensiveren Behandlung führt, wenn dies erwünscht ist. Andernfalls kann aber auch unabhängig von der Drehrichtungssteuerung der Wäschetrommel 3 der Wert der Höhe H abwechselnd stetig steigen und fallen.But also the values of the height H of the annular elevations 8 and / or 9 with each other may differ. For example, it may be useful in an alternating rotary operation of the laundry drum 3 to equip the successive elevations 8 and / or 9 of a row 6 with steadily increasing height relative to the lateral surface of the laundry drum 3. For example, after a certain number of surveys, this slope can suddenly fall back to the initial value. This creates a discontinuity that leads in one drum rotation to a gentle laundry treatment, but in the other direction of rotation to a more intense treatment, if desired. Otherwise, however, regardless of the direction of rotation control of the laundry drum 3, the value of the height H alternately rise and fall steadily.

Claims (13)

  1. Laundry drum for a laundry treatment machine with a drum casing (4), having structures (6) distributed in the circumferential direction, which are raised from the cylindrical shape of the drum casing (4) accommodated in the laundry drum, characterised in that each structure is formed from a linear protrusion (8), which is closed in a ring shape, and arranged within the linear protrusions (8) closed in a ring shape are concentric lens-shaped protrusions (9).
  2. Laundry drum according to claim 1, characterised in that the linear protrusions (8) closed in a ring shape are arranged in rows (6) which are oriented in the circumferential direction (10).
  3. Laundry drum according to claim 2, characterised in that the rows (6) extend in parallel to the circumferential direction (10).
  4. Laundry drum according to one of claims 2 and 3, characterised in that the protrusions (8) of a row (6) are at distances (A) which at least partly differ from one another.
  5. Laundry drum according to one of claims 2 to 4, characterised in that adjacent rows (6) in each case have distances (A) which at least partly differ from each other.
  6. Laundry drum according to one of claims 2 to 5, characterised in that the protrusions (8) have different diameters (D) in relation to each other.
  7. Laundry drum according to one of claims 2 to 6, characterised in that protrusions (8) of adjacent rows (6) extend offset in relation to each other in the direction of the axis (T-T) of the laundry drum (3) in the circumferential direction (10).
  8. Laundry drum according to one of claims 2 to 7, characterised in that the rows (6) do not lie in parallel to the outer line of the drum casing (4) and in relation to each other are at least partly at different distances from each other.
  9. Laundry drum according to one of the previous claims, characterised in that the linear protrusions (8) closed in a ring shape are circular.
  10. Laundry drum according to one of claims 1 to 7, characterised in that the linear protrusions (8) closed in a ring shape are elliptical.
  11. Laundry drum according to one of the previous claims, characterised in that a row (6) of consecutive linear protrusions (8) closed in a ring shape and/or lens-shaped protrusions (9) have a constantly rising and/or falling value of the height (H).
  12. Laundry drum according to claim 11, characterised in that the value of the height (H) before and/or after a certain number of protrusions (8 and/or 9) jumps abruptly to the initial value of the height (H).
  13. Laundry drum according to one of the previous claims, characterised in that the drum casing (4) does not have any holes for the passage of a fluid.
EP09165476.4A 2008-07-18 2009-07-15 Laundry drum for a washing processing machine Not-in-force EP2145992B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810040539 DE102008040539A1 (en) 2008-07-18 2008-07-18 Laundry drum for a laundry treatment machine

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EP2145992A1 EP2145992A1 (en) 2010-01-20
EP2145992B1 true EP2145992B1 (en) 2017-05-24

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN104947373B (en) * 2014-03-24 2018-12-25 青岛海尔洗衣机有限公司 A kind of attached block structure of washing machine inner tub
US20210355622A1 (en) * 2018-08-30 2021-11-18 Lg Electronics Inc. Washing machine and method of controlling the same

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE6606902U (en) * 1967-08-09 1970-12-17 Siemens Elektrogeraete Gmbh DRUM WITH PERFORATED COAT FOR TAPE LUNCHING MACHINES INTENDED FOR SPIN
DE2363935A1 (en) * 1973-12-20 1975-07-03 Bosch Siemens Hausgeraete COAT FOR A CLOTHING DRUM OF A WASHING MACHINE
DE102005026175A1 (en) * 2005-06-06 2006-12-07 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance with a laundry drum embossed

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Publication number Priority date Publication date Assignee Title
DE4437986A1 (en) 1994-10-24 1996-04-25 Frank Dr Mirtsch Structuring a material surface with bulges
DE19603710A1 (en) * 1996-02-02 1997-08-07 Aeg Hausgeraete Gmbh Washer dryer, for minimised noise during washing and spinning
DE10162918A1 (en) * 2001-12-20 2003-07-03 Bsh Bosch Siemens Hausgeraete Drum for a laundry treatment machine
US20070130698A1 (en) 2003-02-12 2007-06-14 Kim Su H Washer method and apparatus
DE102005023444A1 (en) * 2005-05-20 2006-11-23 BSH Bosch und Siemens Hausgeräte GmbH Drum with embossed seam

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6606902U (en) * 1967-08-09 1970-12-17 Siemens Elektrogeraete Gmbh DRUM WITH PERFORATED COAT FOR TAPE LUNCHING MACHINES INTENDED FOR SPIN
DE2363935A1 (en) * 1973-12-20 1975-07-03 Bosch Siemens Hausgeraete COAT FOR A CLOTHING DRUM OF A WASHING MACHINE
DE102005026175A1 (en) * 2005-06-06 2006-12-07 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance with a laundry drum embossed

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EP2145992A1 (en) 2010-01-20
DE102008040539A1 (en) 2010-01-21

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