EP2390399B1 - Drum for a washing machine - Google Patents

Drum for a washing machine Download PDF

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Publication number
EP2390399B1
EP2390399B1 EP10401070A EP10401070A EP2390399B1 EP 2390399 B1 EP2390399 B1 EP 2390399B1 EP 10401070 A EP10401070 A EP 10401070A EP 10401070 A EP10401070 A EP 10401070A EP 2390399 B1 EP2390399 B1 EP 2390399B1
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EP
European Patent Office
Prior art keywords
drum
holes
webs
drum according
segments
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EP10401070A
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German (de)
French (fr)
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EP2390399A1 (en
Inventor
Benedikt Fechtel
Felix Rütten
Felix Maßmann
Werner Hunke
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Miele und Cie KG
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Miele und Cie KG
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Priority to EP10401070A priority Critical patent/EP2390399B1/en
Priority to PL10401070T priority patent/PL2390399T3/en
Priority to ES10401070T priority patent/ES2399039T3/en
Publication of EP2390399A1 publication Critical patent/EP2390399A1/en
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Publication of EP2390399B1 publication Critical patent/EP2390399B1/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

Definitions

  • the invention relates to a drum for a washing machine with a tub, in which the drum can be rotatably mounted on a horizontal or inclined axis, comprising a cylindrical shell, which is bounded by an end wall, wherein the jacket has a structure of directed towards the drum interior vaults, which consists of individual curved segments and between the segments formed webs, and further comprises holes for the passage of washing liquid, wherein the bulges are arranged to form a net-like structure of the webs.
  • the laundry For washing laundry in a drum washing machine, the laundry is washed with water with the addition of detergent with strong drum motion.
  • the drum is hereby perforated, so that the water in the tub with the laundry, which is located in the drum, comes into contact.
  • To improve the fürbefuchtung scooping ribs are mounted in the drum, which raise the water from the lower portion of the tub upwards and distribute from there over the laundry.
  • Such a drum for a washing machine is known. So that the laundry is spared during washing, a few holes in the drum shell are arranged with a smaller diameter, here about 2 mm. In the case of small holes, not so many fibers penetrate there during washing or spinning, as a result of which pilling or fiber detachment is avoided.
  • the known drum has a structure of curvatures directed towards the interior of the drum. The holes are arranged in the corner points of the edge contours of the bulges. This ensures good protection of the laundry, as it can slide along the vaults with very little friction.
  • the bulges are in this case uniformly structured, so that the laundry movement is caused by driving ribs which are arranged distributed on the inside of the drum shell over the circumference.
  • the flow of washing liquid or the alkali exchange between the inside of the drum and the tub does not always run optimally.
  • the entrainment effect of the garments on the drum shell may suffer when a film of water forms whereby the garments slide too easily downwards or remain in the lower position, resulting in a reduced mechanical action.
  • the invention is therefore based on the object to provide a drum with buckles, in which the mechanical action and the drainage are improved.
  • the main advantage of the drum according to the invention is that an improved movement of the laundry within the drum is achieved when it is arranged approximately horizontally or inclined and rotated at a normal speed for the washing phase, for example 20 to 70 rpm. Furthermore, the conservation of the laundry items is maintained, so that premature wear or damage can be avoided.
  • the drum according to the invention in particular the drum casing, comprises a structure of curvatures directed towards the interior of the drum, which consists of individual curved segments.
  • the holes are in this case arranged in the webs, such that the webs in the areas of the star points or intersections are free of holes.
  • a weakening of the material of the drum shell is avoided because the area particularly stressed by the deformation of the material is no longer provided with a hole.
  • this arrangement provides the advantage that the holes in the narrower areas of the webs, based on the web width in the crossing areas, are located so that the holes are partially not reached by the laundry.
  • the holes are each arranged in the range of 1/4 to 1/3 of the total web length, which results from the distance between two centers of two adjacent star points or intersections, away from a center of a star point away in the web.
  • the curved segments each have a polygonal shape, wherein the edge contours of two adjacent segments are spaced from each other to form a ridge.
  • the webs between two bulges have an approximately constant width, which on the one hand has a stabilizing effect on the drum shell.
  • a constant flow is achieved within the webs, so that no speed reduction of the liquid flow occurs to the openings.
  • a certain self-cleaning effect of the holes and the areas around the holes is achieved.
  • there is a nearly continuous arch structure which can thereby exert particularly effective movement impulses on the laundry.
  • the corners are rounded with a radius in the range of 2 to 10 mm. Due to the smooth transitions, an improved sliding of the laundry items over the vaults is achieved. It is expedient to arrange the holes in each case in the region of a web, in each of which a rounding begins.
  • the area of a curvature on the casing is about 1000 to 2500 mm 2.
  • three webs always meet at the intersection areas, wherein each web is assigned at least one own through-hole. The flooding is not affected due to the large number of holes when the bulges are formed so large.
  • equilateral form of the curved areas results in a key width in the range between 38 to 55 mm.
  • the diameter of the holes in the range of 1/3 of the web width is up to the entire web width. This ensures that the holes are not in the area of the curvature, so that no sharp edges of the hole edges can occur towards the inside of the drum. This is especially important for the laundry, as thread-pulling or abrasion is reduced.
  • the height of the bulges is suitably about 0.1 to 2 mm.
  • the bulges each have a height which is approximately proportional to the length and width of the surfaces, wherein the height corresponds to about 1/500 to 1/20 of the width or the length of the respective segment. This can be advantageous to avoid exaggerated violent movement impulses and to achieve a gentle laundry treatment.
  • the segments have a polygonal base
  • Fig. 1 is a purely schematic representation of a washing machine 1, shown with a tub 2.
  • the position and direction information refer to the operational installation position of the washing machine 1.
  • a rotatably mounted on a horizontal or inclined axis and driven by an electric motor 13 drum 3 is arranged, which in the tub 2 and in the drum 3 located laundry 8 moves.
  • the drum 3 is made in the present embodiment of stainless steel and with a plurality of holes 25 (FIG. Fig. 3 ) provided for the flooding.
  • the housing 4 has a loading opening 9, via which the interior of the drum 3 can be reached through the sealing sleeve 6.
  • the loading opening 9 can be closed by means of the door 5.
  • a radiator 10 is arranged in the lower region of the tub 2.
  • an inlet valve 15 is sketched, which controls the entry of the water from the supply network.
  • the water is passed through the connecting pipe 14 in the tub 2, wherein in the dispenser 11 entered detergent is flushed into the tub 2.
  • a drain device 12 is arranged, which brings out the spent washing liquid or the rinse water 7 from the tub 2 to the drain line 16, which usually opens into a sewer.
  • the control device 17 controls the water inlet 15, the activity of the drain device 12 and the drive motor 13, which is energized via the power unit or a frequency converter 18.
  • Fig. 2 the drum 3 is shown, which consists of a jacket 19 and two opposite end walls 20, wherein here for better illustration of the inside of the jacket 19, the front end face is removed.
  • On the inside 19a of the shell 19 are distributed over the circumference several scooping ribs 21, in this example, three, attached.
  • the scoop ribs 21 are formed in profile V-shaped or parabolic.
  • the drum 3 is perforated with the holes 25 (FIG. Fig. 3 ) are arranged between the curved segments 22 and a diameter of about 1.8 to 2.5 mm, preferably 2 mm.
  • the drum shell 19 is here divided into three sections 26 which are divided by the scoop ribs 21.
  • a structure of polygonal segments 22, in this example hexagonal, formed with their contours 22a (FIG. Fig. 3 ) are spaced apart to their respective adjacent segments 22 and form a honeycomb-like arrangement.
  • Fig. 3 is a section 26 of the inner side 19 a of the shell 19 shown as outlined development.
  • the curved segments 22 are in this case formed hexagonal with rounded corners 22a.
  • the edge contours of the hexagons of two adjacent bulges 22 do not touch each other, so that the spacing of the contours each forms a web 24.
  • the holes 25 are arranged so that they do not lie at or in the corners of the edge contour of the polygons.
  • Fig. 4 shows a section of the vault-structured lateral surface 19a with three mutually adjacent hexagonal curved segments 22.
  • the segments 22 are spaced from each other, so that in each case forms a web with the web width SB.
  • the area in and around the star point 27 is free of holes, since the holes 25 are only spaced apart from the star point 27.
  • the corners of the polygons are not rounded off, so that a reduced area of the crossing area 27 results, compared to a crossing area 27 with rounded corners.
  • Fig. 5 shows a section along the section line BB of the shell 19.
  • the curved segments 22 are curved towards the central axis A of the drum or that the vertex of the curvature 22 is closer to the central axis A, as the webs 24th or the holes 25.
  • the course of the curvature 22 begins this rising flat and forms a dome in the middle of the shape of a blunt tip.
  • the diameter d of the holes 25 is set in this example about one third and up to half of the web width SB.
  • Fig. 6 shows an embodiment in which the bulge 22 starts from the web 24 or a hole 25, starting steeply and is continuously flattened from this, to the central region, so that this corresponds to an elliptical course.
  • the hole diameter d is set in this example about the entire web width SB.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Description

Die Erfindung betrifft eine Trommel für eine Waschmaschine mit einem Laugenbehälter, in dem die Trommel über eine horizontale oder geneigte Achse drehbar gelagert werden kann, umfassend einen zylinderförmigen Mantel, der mittels einer Stirnwand begrenzt ist, wobei der Mantel eine Struktur aus zum Trommelinneren gerichteten Wölbungen, die aus einzelnen gewölbten Segmenten und zwischen den Segmenten ausgebildeten Stegen besteht, und ferner Löcher zum Durchtritt von Waschflüssigkeit umfasst, wobei die Wölbungen zur Bildung einer netzartigen Struktur der Stege angeordnet sind.The invention relates to a drum for a washing machine with a tub, in which the drum can be rotatably mounted on a horizontal or inclined axis, comprising a cylindrical shell, which is bounded by an end wall, wherein the jacket has a structure of directed towards the drum interior vaults, which consists of individual curved segments and between the segments formed webs, and further comprises holes for the passage of washing liquid, wherein the bulges are arranged to form a net-like structure of the webs.

Zum Waschen von Wäsche in einer Trommelwaschmaschine wird die Wäsche mit Wasser unter Zugabe von Waschmittel mit starker Trommelbewegung gewaschen. Die Trommel ist hierbei gelocht, damit das Wasser im Laugenbehälter mit der Wäsche, die sich in der Trommel befindet, in Kontakt kommt. Zur Verbesserung der Durchfeuchtung sind in der Trommel Schöpfrippen angebracht, die das Wasser aus dem unteren Bereich des Laugenbehälters nach oben heben und von dort aus über die Wäsche verteilen.For washing laundry in a drum washing machine, the laundry is washed with water with the addition of detergent with strong drum motion. The drum is hereby perforated, so that the water in the tub with the laundry, which is located in the drum, comes into contact. To improve the Durchbefuchtung scooping ribs are mounted in the drum, which raise the water from the lower portion of the tub upwards and distribute from there over the laundry.

Aus der EP 0 935 687 B1 , der DE 101 62 918 A1 oder der EP 1 098 189 A2 ist eine derartige Trommel für eine Waschmaschine bekannt. Damit die Wäsche beim Waschen geschont wird, sind wenige Löcher im Trommelmantel mit einem kleineren Durchmesser angeordnet, hierbei etwa 2 mm. Bei kleinen Löchern dringen beim Waschen oder Schleudern nicht so viele Fasern dort ein, wodurch Noppenbildung oder Faserablösungen vermieden werden. Die bekannte Trommel besitzt eine Struktur von Wölbungen, die zum Trommelinneren hin gerichtet sind. Die Löcher sind hierbei in den Eckpunkten der Randkonturen der Wölbungen angeordnet. Dadurch wird eine gute Schonung der Wäsche erreicht, da sie auf den Wölbungen sehr reibungsarm entlang gleiten kann. Die Wölbungen sind hierbei gleichmäßig strukturiert, so dass die Wäschebewegung von Mitnehmerrippen verursacht wird, die auf der Innenseite des Trommelmantels über den Umfang verteilt angeordnet sind. bei dieser Anordnung kann es jedoch vorkommen, dass die Durchflutung der Waschflüssigkeit bzw. der Laugenaustausch zwischen dem Trommelinneren und dem Laugenbehälter nicht immer optimal abläuft. Ferner kann der Mitnahmeeffekt der Wäschestücke am Trommelmantel leiden, wenn sich ein Wasserfilm bildet, wodurch die Wäschestücke zu leicht nach unten gleiten bzw. in der unteren Position verbleiben, wodurch sich eine verminderte mechanische Einwirkung ergibt.From the EP 0 935 687 B1 , of the DE 101 62 918 A1 or the EP 1 098 189 A2 Such a drum for a washing machine is known. So that the laundry is spared during washing, a few holes in the drum shell are arranged with a smaller diameter, here about 2 mm. In the case of small holes, not so many fibers penetrate there during washing or spinning, as a result of which pilling or fiber detachment is avoided. The known drum has a structure of curvatures directed towards the interior of the drum. The holes are arranged in the corner points of the edge contours of the bulges. This ensures good protection of the laundry, as it can slide along the vaults with very little friction. The bulges are in this case uniformly structured, so that the laundry movement is caused by driving ribs which are arranged distributed on the inside of the drum shell over the circumference. In this arrangement, it may happen that the flow of washing liquid or the alkali exchange between the inside of the drum and the tub does not always run optimally. Furthermore, the entrainment effect of the garments on the drum shell may suffer when a film of water forms whereby the garments slide too easily downwards or remain in the lower position, resulting in a reduced mechanical action.

Der Erfindung liegt deshalb die Aufgabe zu Grunde, eine Trommel mit Wölbungen bereitzustellen, bei der die mechanische Einwirkung und die Wasserableitung verbessert sind.The invention is therefore based on the object to provide a drum with buckles, in which the mechanical action and the drainage are improved.

Die Aufgabe wird durch eine Trommel mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausführungen ergeben sich aus den nachfolgenden abhängigen Ansprüchen.The object is achieved by a drum having the features of claim 1. Advantageous embodiments will become apparent from the following dependent claims.

Der wesentliche Vorteil der erfindungsgemäßen Trommel ist, dass eine verbesserte Bewegung der Wäschestücke innerhalb der Trommel erreicht wird, wenn diese etwa horizontal oder geneigt angeordnet und mit einer für die Waschphase üblichen Drehzahl, beispielsweise 20 bis 70 u/min gedreht wird. Ferner wird die Schonung der Wäschestücke beibehalten, so dass vorzeitiger Verschleiß oder Beschädigungen vermieden werden.The main advantage of the drum according to the invention is that an improved movement of the laundry within the drum is achieved when it is arranged approximately horizontally or inclined and rotated at a normal speed for the washing phase, for example 20 to 70 rpm. Furthermore, the conservation of the laundry items is maintained, so that premature wear or damage can be avoided.

Die erfindungsgemäße Trommel, insbesondere der Trommelmantel umfasst hierzu eine Struktur aus zum Trommelinneren gerichteten Wölbungen, die aus einzelnen gewölbten Segmenten besteht. Die Löcher sind hierbei in den Stegen angeordnet, derart, dass die Stege in den Bereichen der Sternpunkte bzw. Kreuzungen frei von Löchern sind. Dadurch wird eine Schwächung des Materials des Trommelmantels vermieden, da der durch die Materialverformung besonders gestresste Bereich nicht mehr mit einem Loch versehen ist. Ferner ergibt sich durch diese Anordnung der Vorteil, dass sich die Löcher in den schmaleren Bereichen der Stege, bezogen auf die Stegbreite in den Kreuzungsbereichen, befinden, so dass die Löcher von den Wäschestücken teilweise nicht erreicht werden.For this purpose, the drum according to the invention, in particular the drum casing, comprises a structure of curvatures directed towards the interior of the drum, which consists of individual curved segments. The holes are in this case arranged in the webs, such that the webs in the areas of the star points or intersections are free of holes. As a result, a weakening of the material of the drum shell is avoided because the area particularly stressed by the deformation of the material is no longer provided with a hole. Furthermore, this arrangement provides the advantage that the holes in the narrower areas of the webs, based on the web width in the crossing areas, are located so that the holes are partially not reached by the laundry.

In einer vorteilhaften Weiterbildung sind die Löcher jeweils im Bereich von 1/4 bis 1/3 der gesamten Steglänge, die sich aus dem Abstand zwischen zwei Mittelpunkten von zwei benachbarten Sternpunkten bzw. Kreuzungen ergibt, entfernt von einem Mittelpunkt eines Sternpunktes entfernt im Steg angeordnet. Dadurch wird eine verbesserte Flüssigkeitsabführung aus den Stegen erreicht, da jeder Steg zumindest ein eigenes Durchflutungsloch besitzt, das keine Flüssigkeit aus einem anderen Steg aufnehmen muss, wie es bei einer Anordnung in den Bereichen der Sternpunkte oder den Kreuzungsbereichen der Fall wäre.In an advantageous development, the holes are each arranged in the range of 1/4 to 1/3 of the total web length, which results from the distance between two centers of two adjacent star points or intersections, away from a center of a star point away in the web. As a result, an improved liquid discharge from the webs is achieved, since each web has at least one own through-hole, which does not have to take up liquid from another web, as would be the case with an arrangement in the regions of the star points or the intersection regions.

Insgesamt ist es vorteilhaft, dass die gewölbten Segmente jeweils eine mehreckige Form besitzen, wobei die Randkonturen zwei benachbarter Segmente beabstandet zueinander angeordnet sind zur Bildung eines Steges. Dadurch haben die Stege zwischen zwei Wölbungen eine etwa konstante Breite, die sich einerseits stabilisierend auf den Trommelmantel auswirkt. Andererseits wird eine konstante Strömung innerhalb der Stege erreicht, so dass zu den Öffnungen hin keine Geschwindigkeitsreduzierung der Flüssigkeitsströmung auftritt. Ein gewisser Selbstreinigungseffekt der Löcher und der Bereiche um die Löcher wird dadurch erreicht. Ferner ergibt sich eine nahezu zusammenhängende Wölbstruktur, die dadurch besonders effektiv die Bewegungsimpulse auf die Wäschestücke ausüben kann.Overall, it is advantageous that the curved segments each have a polygonal shape, wherein the edge contours of two adjacent segments are spaced from each other to form a ridge. As a result, the webs between two bulges have an approximately constant width, which on the one hand has a stabilizing effect on the drum shell. On the other hand, a constant flow is achieved within the webs, so that no speed reduction of the liquid flow occurs to the openings. A certain self-cleaning effect of the holes and the areas around the holes is achieved. Furthermore, there is a nearly continuous arch structure, which can thereby exert particularly effective movement impulses on the laundry.

Bei der mehreckigen Ausführung der Wölbungen ist es vorteilhaft, dass die Bereiche der Eckpunkte der Randkonturen frei von Löchern sind. Dadurch wird der besonders gestresste Bereich der Materialverformung nicht durch Löcher geschwächt.In the case of the polygonal design of the bulges, it is advantageous for the regions of the corner points of the edge contours to be free of holes. As a result, the particularly stressed area of material deformation is not weakened by holes.

In einer vorteilhaften Weiterbildung sind die Ecken mit einem Radius im Bereich von 2 bis 10 mm abgerundet. Aufgrund der sanften Übergänge wird ein verbessertes Gleiten der Wäschestücke über die Wölbungen erreicht. Hierbei ist es zweckmäßig, die Löcher jeweils im Bereich eines Steges anzuordnen, in dem jeweils eine Abrundung beginnt.In an advantageous development, the corners are rounded with a radius in the range of 2 to 10 mm. Due to the smooth transitions, an improved sliding of the laundry items over the vaults is achieved. It is expedient to arrange the holes in each case in the region of a web, in each of which a rounding begins.

In einer zweckmäßigen Weiterbildung beträgt die Fläche einer Wölbung auf dem Mantel etwa 1000 bis 2500 mm^2. Bei einer wabenartigen Anordnung treffen in den Kreuzungsbereichen immer drei Stege aufeinander, wobei jedem Steg jeweils zumindest ein eigenes Durchflutungsloch zugeordnet ist. Die Durchflutung wird aufgrund der Vielzahl von Löchern nicht beeinträchtig, wenn die Wölbungen derart groß ausgebildet werden. Bei einer sechseckigen, gleichseitigen Form der gewölbten Bereiche ergibt sich eine Schlüsselweite im Bereich zwischen 38 bis 55 mm.In an expedient development, the area of a curvature on the casing is about 1000 to 2500 mm 2. In a honeycomb arrangement, three webs always meet at the intersection areas, wherein each web is assigned at least one own through-hole. The flooding is not affected due to the large number of holes when the bulges are formed so large. In a hexagonal, equilateral form of the curved areas results in a key width in the range between 38 to 55 mm.

Insgesamt ist es vorteilhaft, die Breite der Stege zwischen den Wölbungen im Bereich von 3 bis 5 mm auszubilden. Dadurch wird einerseits eine gute Flüssigkeitsabführung zu den Löchern bereitgestellt. Ferner wird in Stegen, die sich quer zur Drehrichtung der Trommel befinden, ein verbesserter Mitnahmeeffekt für die Waschflüssigkeit erreicht, so dass eine unterstützende Schöpfwirkung entsteht.Overall, it is advantageous to form the width of the webs between the bulges in the range of 3 to 5 mm. As a result, on the one hand a good liquid discharge is provided to the holes. Furthermore, in webs, which are transverse to the direction of rotation of the drum, an improved entrainment effect for the washing liquid is achieved, so that a supporting scooping action arises.

In einer vorteilhaften Ausführung liegt der Durchmesser der Löcher im Bereich von 1/3 der Stegbreite bis zu der gesamten Stegbreite. Dadurch ist sichergestellt, dass die Löcher nicht im Bereich der Wölbung liegen, so dass keine scharfen Kanten der Lochränder zum Trommelinneren hin auftreten können. Das ist besonders für die Wäscheschonung wichtig, da Fadenzieher oder Abrieb vermindert werden. Bei den vormals genannten Stegbreiten ist es zweckmäßig, einen Durchmesser für die Löcher im Bereich von 1,8 bis 3 mm, vorzugsweise 2 bis 2,5 mm, vorzusehen.In an advantageous embodiment, the diameter of the holes in the range of 1/3 of the web width is up to the entire web width. This ensures that the holes are not in the area of the curvature, so that no sharp edges of the hole edges can occur towards the inside of the drum. This is especially important for the laundry, as thread-pulling or abrasion is reduced. In the previously mentioned web widths, it is expedient to provide a diameter for the holes in the range of 1.8 to 3 mm, preferably 2 to 2.5 mm.

Die Höhe der Wölbungen beträgt zweckmäßigerweise etwa 0,1 bis 2 mm. In einer anderen Ausführung weisen die Wölbungen jeweils eine Höhe auf, die in etwa proportional zur Länge und Breite der Flächen ist, wobei die Höhe etwa 1/500 bis 1/20 der Breite bzw. der Länge des jeweiligen Segments entspricht. Das kann vorteilhaft sein, um übertrieben heftige Bewegungsimpulse zu vermeiden und eine schonende Wäschebehandlung zu erreichen.The height of the bulges is suitably about 0.1 to 2 mm. In another embodiment, the bulges each have a height which is approximately proportional to the length and width of the surfaces, wherein the height corresponds to about 1/500 to 1/20 of the width or the length of the respective segment. This can be advantageous to avoid exaggerated violent movement impulses and to achieve a gentle laundry treatment.

Bei der Ausführung, bei der die Segmente eine vieleckige Grundfläche haben, ist es vorteilhaft, den Trommelmantel mit Löchern zur Durchflutung von Waschflüssigkeit zu versehen und die Löcher in den Eckpunkten der Randkontur der Segmente anzuordnen. Dadurch wird eine gute Entwässerung erreicht, trotz geringer Anzahl von Flutlöchern.In the embodiment in which the segments have a polygonal base, it is advantageous to provide the drum shell with holes for the flow of washing liquid and the To arrange holes in the corners of the edge contour of the segments. This achieves good drainage despite a small number of flood holes.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigen:

Fig. 1:
eine Waschmaschine in einer skizzierten Schnittdarstellung;
Fig. 2:
die Trommel in einer perspektivischen Ansicht;
Fig. 3 bis 4:
den Trommelmantel in einer skizzierten abgewickelten Ansicht und
Fig. 5 bis 6:
den Trommelmantelausschnitt als Schnittdarstellung.
An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. Show it:
Fig. 1:
a washing machine in a sketched sectional view;
Fig. 2:
the drum in a perspective view;
3 to 4:
the drum casing in a sketched unfolded view and
5 to 6:
the drum shell cutout as a sectional view.

In Fig. 1 ist in rein schematischer Darstellung eine Waschmaschine 1, mit einem Laugenbehälter 2 dargestellt. Die Positions- und Richtungsangaben beziehen sich auf die betriebsgemäße Aufstellposition der Waschmaschine 1. Innerhalb des Laugenbehälters 2 ist eine über eine horizontale oder geneigte Achse drehbar gelagerte und über einen elektrischen Motor 13 angetriebene Trommel 3 angeordnet, die die im Laugenbehälter 2 bzw. in der Trommel 3 befindlichen Wäschestücke 8 bewegt. Die Trommel 3 ist im vorliegenden Ausführungsbeispiel aus Edelstahl hergestellt und mit einer Vielzahl an Löchern 25 (Fig. 3) für die Durchflutung versehen. Das Gehäuse 4 hat eine Beladungsöffnung 9, über die das Innere der Trommel 3 durch die Dichtungsmanschette 6 hindurch erreichbar ist. Die Beladungsöffnung 9 ist mittels der Tür 5 verschließbar. Im unteren Bereich des Laugenbehälters 2 ist die Waschflüssigkeit 7, welche zum Reinigen oder Behandeln der Wäsche 8 benötigt wird. Zur Erwärmung oder zum Erhitzen der Flüssigkeit 7 ist im unteren Bereich des Laugenbehälters 2 ein Heizkörper 10 angeordnet. Im oberen Bereich der Maschine 1 ist ein Einlassventil 15 skizziert, welches das Einlaufen des Wassers aus dem Versorgungsnetz steuert. Über den Einspülkasten 11 wird das Wasser über das Verbindungsrohr 14 in den Laugenbehälter 2 geleitet, wobei im Einspülkasten 11 eingegebenes Waschmittel mit in den Laugenbehälter 2 gespült wird. Unterhalb des Laugenbehälters ist eine Ablaufeinrichtung 12 angeordnet, die die verbrauchte Waschflüssigkeit oder das Spülwasser 7 aus dem Laugenbehälter 2 zur Ablaufleitung 16 herausführt, die in der Regel in einen Abwasserkanal mündet. Die Steuereinrichtung 17 steuert den Wassereinlauf 15, die Aktivität der Ablaufeinrichtung 12 und den Antriebsmotor 13, der über das Leistungsteil oder einen Frequenzumrichter 18 bestromt wird.In Fig. 1 is a purely schematic representation of a washing machine 1, shown with a tub 2. The position and direction information refer to the operational installation position of the washing machine 1. Within the tub 2 a rotatably mounted on a horizontal or inclined axis and driven by an electric motor 13 drum 3 is arranged, which in the tub 2 and in the drum 3 located laundry 8 moves. The drum 3 is made in the present embodiment of stainless steel and with a plurality of holes 25 (FIG. Fig. 3 ) provided for the flooding. The housing 4 has a loading opening 9, via which the interior of the drum 3 can be reached through the sealing sleeve 6. The loading opening 9 can be closed by means of the door 5. In the lower region of the tub 2, the washing liquid 7, which is needed for cleaning or treating the laundry 8. For heating or for heating the liquid 7, a radiator 10 is arranged in the lower region of the tub 2. In the upper part of the machine 1, an inlet valve 15 is sketched, which controls the entry of the water from the supply network. About the Einspülkasten 11, the water is passed through the connecting pipe 14 in the tub 2, wherein in the dispenser 11 entered detergent is flushed into the tub 2. Below the tub, a drain device 12 is arranged, which brings out the spent washing liquid or the rinse water 7 from the tub 2 to the drain line 16, which usually opens into a sewer. The control device 17 controls the water inlet 15, the activity of the drain device 12 and the drive motor 13, which is energized via the power unit or a frequency converter 18.

In Fig. 2 ist die Trommel 3 dargestellt, die aus einem Mantel 19 und zwei gegenüberliegenden Stirnwänden 20 besteht, wobei hier zur besseren Darstellung der Innenseite des Mantels 19 die vordere Stirnseite entfernt ist. Auf der Innenseite 19a des Mantels 19 sind über den Umfang verteilt mehrere Schöpfrippen 21, in diesem Beispiel drei, angebracht. Die Schöpfrippen 21 sind im Profil V-förmig oder parabelförmig geformt. Die Trommel 3 ist gelocht, wobei die Löcher 25 (Fig. 3) zwischen den gewölbten Segmenten 22 angeordnet sind und einen Durchmesser von etwa 1,8 bis 2,5 mm, vorzugsweise 2 mm, haben. Der Trommelmantel 19 ist hierbei in drei Abschnitte 26 unterteilt, die durch die Schöpfrippen 21 unterteilt sind. Hierbei ist in jedem Abschnitt 26 eine Struktur von mehreckigen Segmenten 22, in diesem Beispiel 6-eckig, ausgebildet, die mit ihren Konturen 22a (Fig. 3) zu ihren jeweils benachbarten Segmenten 22 beabstandet angeordnet sind und eine wabenartige Anordnung bilden.In Fig. 2 the drum 3 is shown, which consists of a jacket 19 and two opposite end walls 20, wherein here for better illustration of the inside of the jacket 19, the front end face is removed. On the inside 19a of the shell 19 are distributed over the circumference several scooping ribs 21, in this example, three, attached. The scoop ribs 21 are formed in profile V-shaped or parabolic. The drum 3 is perforated with the holes 25 (FIG. Fig. 3 ) are arranged between the curved segments 22 and a diameter of about 1.8 to 2.5 mm, preferably 2 mm. The drum shell 19 is here divided into three sections 26 which are divided by the scoop ribs 21. Here, in each section 26, a structure of polygonal segments 22, in this example hexagonal, formed with their contours 22a (FIG. Fig. 3 ) are spaced apart to their respective adjacent segments 22 and form a honeycomb-like arrangement.

In Fig. 3 ist ein Abschnitt 26 der Innenseite 19a des Mantels 19 als skizzierte Abwicklung dargestellt. Die gewölbten Segmente 22 sind hierbei sechseckig mit abgerundeten Ecken 22a ausgebildet. Die Randkonturen der Sechsecke von zwei benachbarten Wölbungen 22 berühren sich hierbei nicht, so dass der Abstand der Konturen jeweils einen Steg 24 bildet. Daraus ergibt sich eine netzartige Gesamtstruktur von Stegen 24, wobei die Löcher 25 beabstandet zu den Stern- oder Kreuzungspunkten 27 der Stege 24 angeordnet sind. An den Enden der Wölbstruktur sind die Löcher 25 so angeordnet, dass sie nicht an oder in den Eckpunkten der Randkontur der Vielecke liegen.In Fig. 3 is a section 26 of the inner side 19 a of the shell 19 shown as outlined development. The curved segments 22 are in this case formed hexagonal with rounded corners 22a. The edge contours of the hexagons of two adjacent bulges 22 do not touch each other, so that the spacing of the contours each forms a web 24. This results in a net-like structure of webs 24, wherein the holes 25 are arranged at a distance from the star or crossing points 27 of the webs 24. At the ends of the arch structure, the holes 25 are arranged so that they do not lie at or in the corners of the edge contour of the polygons.

Fig. 4 zeigt einen Ausschnitt der wölbstrukturierten Mantelfläche 19a mit drei zueinander benachbarten sechseckigen gewölbten Segmenten 22. Die Segmente 22 sind beabstandet zueinander angeordnet, so dass sich jeweils ein Steg mit der Stegbreite SB ausbildet. Der Bereich im und um den Sternpunkt 27 ist frei von Löchern, da die Löcher 25 erst beabstandet zum Sternpunkt 27 angeordnet sind. In diesem Beispiel sind die Ecken der Vielecke nicht abgerundet, so dass sich eine verkleinerte Fläche des Kreuzungsbereichs 27 ergibt, gegenüber einem Kreuzungsbereich 27 mit abgerundeten Ecken. Fig. 4 shows a section of the vault-structured lateral surface 19a with three mutually adjacent hexagonal curved segments 22. The segments 22 are spaced from each other, so that in each case forms a web with the web width SB. The area in and around the star point 27 is free of holes, since the holes 25 are only spaced apart from the star point 27. In this example, the corners of the polygons are not rounded off, so that a reduced area of the crossing area 27 results, compared to a crossing area 27 with rounded corners.

Fig. 5 zeigt einen Ausschnitt entlang der Schnittlinie B-B des Mantels 19. Hier ist zu erkennen, dass die gewölbten Segmente 22 in Richtung zur Mittelachse A der Trommel hin gewölbt sind bzw. dass sich der Scheitelpunkt der Wölbung 22 näher zur Mittelachse A befindet, als die Stege 24 bzw. die Löcher 25. Der Verlauf der Wölbung 22 beginnt hierbei flach ansteigend und bildet im Mittenbereich eine Kuppe in der Form einer stumpfen Spitze. Der Durchmesser d der Löcher 25 ist in diesem Beispiel etwa auf ein Drittel bzw. bis auf die Hälfte der Stegbreite SB festgelegt. Fig. 5 shows a section along the section line BB of the shell 19. Here it can be seen that the curved segments 22 are curved towards the central axis A of the drum or that the vertex of the curvature 22 is closer to the central axis A, as the webs 24th or the holes 25. The course of the curvature 22 begins this rising flat and forms a dome in the middle of the shape of a blunt tip. The diameter d of the holes 25 is set in this example about one third and up to half of the web width SB.

Fig. 6 zeigt eine Ausführung, bei der die Wölbung 22 vom Steg 24 oder einem Loch 25 ausgehend steil beginnt und davon ausgehend kontinuierlich abgeflacht ausgebildet ist, bis zum Mittenbereich, so dass dies einem elliptischen Verlauf entspricht. Hierdurch werden ausgeprägte Stege 24 erreicht, die eine deutliche und gute Wasserströmung bereitstellen. Der Lochdurchmesser d ist in diesem Beispiel etwa auf die gesamte Stegbreite SB festgelegt. Fig. 6 shows an embodiment in which the bulge 22 starts from the web 24 or a hole 25, starting steeply and is continuously flattened from this, to the central region, so that this corresponds to an elliptical course. As a result, pronounced webs 24 are achieved, which provide a clear and good flow of water. The hole diameter d is set in this example about the entire web width SB.

Claims (9)

  1. Drum (3) for a washing machine (1) having a suds container (2), in which the drum (3) can be rotatably mounted via a horizontal or inclined shaft (7), comprising a cylindrical casing (19) which is delimited by means of an end wall (20), the casing (19) comprising a structure made up of domes which face the inside of the drum and consist of individual domed segments (22) and webs (24) formed between the segments (22), and further comprising holes (25) to allow washing liquid to enter, the domes (22) being arranged so as to form a net-like structure of the webs (24), the webs (24) having star points or points of intersection (27), characterised in that the holes (25) are arranged in the webs (24) in such a way that the webs are free of holes in the regions of the star points (27) or intersections.
  2. Drum according to claim 1, characterised in that, in each case in the region from 1/4 to 1/3 of the entire web length (SL) produced by the spacing between two central points of two adjacent star points (2) or intersections (27), the holes (25) are remotely arranged in the web (24), remote from a central point of an intersection (27).
  3. Drum according to claim 1, characterised in that the domed segments (22) each have a polygonal shape, the edge contours of two adjacent segments (22) being spaced apart with respect to one another in order to form a web (24).
  4. Drum according to claim 3, characterised in that the regions of the corner points of the edge contours are free from holes.
  5. Drum according to claim 3, characterised in that the corners (22a) of the polygonal, domed segments (22) are rounded off with a radius in the range of from 2 to 10 mm.
  6. Drum according to claim 5, characterised in that the holes (25) are each arranged in the region of a web (24) in which a respective rounding-off starts.
  7. Drum according to claims 1 to 3, characterised in that the surface area of a domed segment (22) on the casing (19) is approximately 1000 to 2500 mm2.
  8. Drum according to any of claims 1 to 7, characterised in that the width (SB) of the webs (24) between the domed segments (22) is in the range of from 3 to 5 mm.
  9. Drum according to any of claims 1 to 8, characterised in that the holes (25) have a diameter (d) in the range of from 1/3 of the web width (SB) up to the entire web width (SB).
EP10401070A 2010-05-31 2010-05-31 Drum for a washing machine Active EP2390399B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10401070A EP2390399B1 (en) 2010-05-31 2010-05-31 Drum for a washing machine
PL10401070T PL2390399T3 (en) 2010-05-31 2010-05-31 Drum for a washing machine
ES10401070T ES2399039T3 (en) 2010-05-31 2010-05-31 Drum for a washing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10401070A EP2390399B1 (en) 2010-05-31 2010-05-31 Drum for a washing machine

Publications (2)

Publication Number Publication Date
EP2390399A1 EP2390399A1 (en) 2011-11-30
EP2390399B1 true EP2390399B1 (en) 2012-12-26

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ES (1) ES2399039T3 (en)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD761501S1 (en) 2013-09-27 2016-07-12 Whirlpool Corporation Container for clothes washing machine
US10036113B2 (en) 2013-07-22 2018-07-31 Whirlpool Corporation Laundry treating appliance with embossed container

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2628839A1 (en) * 2012-02-18 2013-08-21 Samsung Electronics Co., Ltd Washing machine
KR101944366B1 (en) * 2012-10-10 2019-02-07 삼성전자주식회사 Washing Machine
CN104420124B (en) * 2013-08-29 2018-05-22 青岛海尔滚筒洗衣机有限公司 A kind of washing machine inner tub and washing machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954027C2 (en) * 1998-12-18 2003-01-23 Miele & Cie Device and method for producing dent-structured material webs
DE19905534B4 (en) * 1999-02-10 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Drum washing machine with a laundry drum whose drum shell has a structured surface
DE10162918A1 (en) * 2001-12-20 2003-07-03 Bsh Bosch Siemens Hausgeraete Drum for a laundry treatment machine
DE102005026175A1 (en) * 2005-06-06 2006-12-07 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance with a laundry drum embossed
JP4652306B2 (en) * 2006-09-27 2011-03-16 パナソニック株式会社 Washing machine
KR101136863B1 (en) * 2007-02-28 2012-04-20 삼성전자주식회사 Washing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10036113B2 (en) 2013-07-22 2018-07-31 Whirlpool Corporation Laundry treating appliance with embossed container
USD761501S1 (en) 2013-09-27 2016-07-12 Whirlpool Corporation Container for clothes washing machine
USD867700S1 (en) 2013-09-27 2019-11-19 Whirlpool Corporation Container for clothes washing machine
USD878690S1 (en) 2013-09-27 2020-03-17 Whirlpool Corporation Container for a clothes washing machine

Also Published As

Publication number Publication date
ES2399039T3 (en) 2013-03-25
EP2390399A1 (en) 2011-11-30
PL2390399T3 (en) 2013-04-30

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