EP1925704B1 - Waschmaschinetrommel und Waschmaschine mit einer solchen Trommel. - Google Patents

Waschmaschinetrommel und Waschmaschine mit einer solchen Trommel. Download PDF

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Publication number
EP1925704B1
EP1925704B1 EP20060124786 EP06124786A EP1925704B1 EP 1925704 B1 EP1925704 B1 EP 1925704B1 EP 20060124786 EP20060124786 EP 20060124786 EP 06124786 A EP06124786 A EP 06124786A EP 1925704 B1 EP1925704 B1 EP 1925704B1
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EP
European Patent Office
Prior art keywords
drum
bulges
washing machine
bulge
offset
Prior art date
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Active
Application number
EP20060124786
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English (en)
French (fr)
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EP1925704A1 (de
Inventor
Bernd Luettge
Dieter Grimm
Stefanie Oberkirsch
Kraus Hartmut
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.)
Whirlpool Corp
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Whirlpool Corp
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Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Priority to DE200660020594 priority Critical patent/DE602006020594D1/de
Priority to EP20060124786 priority patent/EP1925704B1/de
Priority to ES06124786T priority patent/ES2362002T3/es
Publication of EP1925704A1 publication Critical patent/EP1925704A1/de
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Publication of EP1925704B1 publication Critical patent/EP1925704B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums

Definitions

  • the present invention relates to a drum adapted to be rotatably mounted in a washing machine or washer-dryer, said drum having a cylindrical wall provided with perforations and with a plurality of bulges.
  • a drum of this kind is shown in EP-A-1028189 in which the bulges or raised sections are oriented towards the interior of the drum.
  • the perforations or openings are provided in indentations between the bulges.
  • DE-A-4437986 discloses a method to form a cylindrical structure with bulges in form of different polygons. Bulges having a square pattern are disclosed, but no detail is given as far as the perforations and bulge shape are concerned.
  • EP-A-935687 discloses a drum for washing machines in which bulges are still oriented towards the interior of the drum, and in which perforations are provided on the edge contours of the bulges.
  • An object of the present invention is to provide a drum of the type mentioned above which increases the gentleness of laundry treatment in high spin speed drums and in which the stiffness of the drum basket is increased.
  • One of the main features of the present invention is to provide bulges which are oriented towards the exterior of the drum and in which the perforations are centred within the bulges, whereby each bulge is punched like a frustum of pyramid from the inside of the drum, and each perforation or hole is in the centre of each punch and whereby each bulge has a pyramid shape with a square base.
  • the pyramid-shape bulges are arranged in a rows/columns matrix, in which the position of a column of bulges to the next column of adjacent bulges is offset of 1/3 of the distance between two adjacent rows, which is also the pitch between bulges.
  • a particular advantage of the drum according to the invention is the possibility to change the distance of one row of pyramid-shaped bulges to the next one without reducing distance of punched areas. Flat space between bulges will not increase by changing offset. Moerover, changing the offset will not change the shape of the bulges.
  • the bulges are shaped in order to avoid substantially flat area between bulges so that water drops will be immediately on an inclined/deformed surface and then driven towards perforations due to the centrifugal force and funnel-shaped bulges.
  • Another important advantage of the present invention is the increase of drum stiffness in bending, which is around 25% if compared to known drums of washing machines.
  • a drum 10 of a washing machine comprises a cylindrical metal wall 12 closed at one end by a substantially flat rear wall (not shown) and presenting, on its other end, an opening 14 for loading/unloading laundry (the opening 14 being aligned with a door - not shown - of the washing machine).
  • the drum shown in figure 1 is for the mounting thereof in the tub of a front loading washing machine, nevertheless the drum can have two opposite end walls and it can be used in a top loading washer as well (in this latter a closable opening for loading/unloading laundry being provided in the cylindrical wall of the drum).
  • the wall 12 of the drum 10 is provided with a plurality of bulges 16 arranged in a sort of row-column matrix as shown in figures 1 and 2 .
  • the columns of the matrix, indicated with reference Y, are all parallel among them and to the rotational axis of the drum 10 as well, indicated with reference R.
  • each column Y is offset 1/3 of the pitch P between each bulge 16.
  • Such offset is indicated with reference K in figure 2 . Due to this offset K of adjacent columns of the matrix, it is not possible to identify parallel rows of the matrix, rather "irregular" rows of the matrix of bulges.
  • the applicant has tested this arrangement with others and it has been considered as the preferred one in term either of drum stiffness or gentle treatment of laundry during washing. Nevertheless also a regular matrix pattern of the bulges, or an offset K of different value (for instance a 1 ⁇ 2 offset) offers many technical advantages compared to the prior art and has to be considered within the scope of the present invention.
  • Each bulge has a square base and has a centred perforation or hole 18 for the passage of water during the washing/drying process.
  • the distance between adjacent bulges is chosen in order to reduce or avoid any flat surface of the drum therebetween.
  • the holes 18 are obtained by punching the metal sheet of the wall 12 and the direction of punching is from the inside of the drum 10 to the outside thereof, in order to avoid burrs.
  • each bulge 16 is shown in figures 3 and 4 . Since the shape is substantially a frustum of pyramid, at least two different regions can be identified: a first region defined by inclined flat walls 16a radiused by corner zones 16b and a second region defined by a bottom flat wall 16c (top of the frustum of pyramid) in which the corresponding hole 18 is centrally located.
  • the above described shape of the bulges 16, together with the hole design, has given a surprising increase of the drum stiffness, particularly with reference to shear and bending.
  • the new design is particularly advantageous in term of its bending stiffness, which is the most important mechanical features when the drum rotates at high speeds, as in the modern high spin speed washers.

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

Claims (6)

  1. Trommel (10), ausgeführt um drehbar in einem Bottich einer Waschmaschine oder einer Waschmaschinen-Trockner Kombination montiert zu sein, besagte Trommel (10) eine zylindrischen Außenwand (12) aufweisend, ausgestattet mit Perforationen (18) und einer Vielzahl von Ausbuchtungen (16), besagte Ausbuchtungen (16) in Richtung der Trommelaußenseite orientiert und die Perforationen (18) im Wesentlichen innerhalb der Ausbuchtungen (16) zentriert, dadurch gekennzeichnet, dass jede Ausbuchtung (16) eine Pyramidenform mit einer rechtwinklige Grundfläche hat.
  2. Trommel nach Anspruch 1, dadurch gekennzeichnet, dass jede Ausbuchtung (16) als stumpfe Pyramide ausgeführt ist.
  3. Trommel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ausbuchtungen (16) in einer Art Zeilen-Spalten Matrix angeordnet sind, in der die Spalten (Y) parallel zur Achse (R) der Trommel (10) sind und sie um einen vorgegebenen anteiligen Versatz in Bezug zur anliegenden Spalte (Y) versetzt sind.
  4. Trommel nach Anspruch 3, dadurch gekennzeichnet, dass der Versatz (K) 1/3 der Teilung (P) ist.
  5. Trommel nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass jede Ausbuchtung (16) geneigte flache Wände (16a) mit abgerundeten Randzonen (16b) hat.
  6. Waschmaschine oder Waschmaschinen-Trockner Kombination, dadurch gekennzeichnet, dass sie eine Trommel (10) entsprechend einem der vorhergehenden Ansprüche umfasst.
EP20060124786 2006-11-24 2006-11-24 Waschmaschinetrommel und Waschmaschine mit einer solchen Trommel. Active EP1925704B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE200660020594 DE602006020594D1 (de) 2006-11-24 2006-11-24 Waschmaschinetrommel und Waschmaschine mit einer solchen Trommel.
EP20060124786 EP1925704B1 (de) 2006-11-24 2006-11-24 Waschmaschinetrommel und Waschmaschine mit einer solchen Trommel.
ES06124786T ES2362002T3 (es) 2006-11-24 2006-11-24 Tambor para una máquina de lavar y máquina de lavar provista de dicho tambor.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060124786 EP1925704B1 (de) 2006-11-24 2006-11-24 Waschmaschinetrommel und Waschmaschine mit einer solchen Trommel.

Publications (2)

Publication Number Publication Date
EP1925704A1 EP1925704A1 (de) 2008-05-28
EP1925704B1 true EP1925704B1 (de) 2011-03-09

Family

ID=37891621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060124786 Active EP1925704B1 (de) 2006-11-24 2006-11-24 Waschmaschinetrommel und Waschmaschine mit einer solchen Trommel.

Country Status (3)

Country Link
EP (1) EP1925704B1 (de)
DE (1) DE602006020594D1 (de)
ES (1) ES2362002T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015027368A1 (zh) * 2013-08-29 2015-03-05 海尔集团公司 一种洗衣机内桶及洗衣机
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 (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101136863B1 (ko) 2007-02-28 2012-04-20 삼성전자주식회사 세탁기
CN101845739B (zh) * 2009-03-23 2013-08-07 海尔集团公司 具有高效率洗涤和脱水结构的洗衣机内桶
GB2473224A (en) * 2009-09-03 2011-03-09 John Vincent Flanagan Detergent-less washing machine
EP2372010B1 (de) * 2010-04-01 2016-09-21 Electrolux Home Products Corporation N.V. Drehtrommel für waschmaschinen und verfahren zur montage der drehtrommel
CZ2010341A3 (cs) * 2010-05-03 2011-03-16 Primus Ce S.R.O. Buben pracky
TR201009624A2 (tr) * 2010-11-23 2011-01-21 Vestel Beyaz Eşya Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇@ Çamaşır makineleri için bir tambur yüzeyi.
EP2628839A1 (de) * 2012-02-18 2013-08-21 Samsung Electronics Co., Ltd Waschmaschine
CN105220404A (zh) * 2014-06-20 2016-01-06 无锡小天鹅股份有限公司 洗衣机及其内筒
CN105063962B (zh) * 2015-08-05 2018-09-18 合肥美的洗衣机有限公司 洗衣机
EP3412823B1 (de) * 2017-06-08 2022-03-30 LG Electronics Inc. Trommel einer waschmaschine
EP3715522B1 (de) * 2019-03-26 2022-05-11 Electrolux Appliances Aktiebolag Waschtrommel für eine wäschewaschmaschine und wäschewaschmaschine mit solch einer trommel
WO2023009096A1 (en) * 2021-07-29 2023-02-02 Vestel Beyaz Esya Sanayi Ve Ticaret Anonim Sirketi A drum for household appliances

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU521357B2 (en) * 1977-09-26 1982-04-01 Fisher & Paykel Limited Bowl or tub
DE29705226U1 (de) 1997-03-22 1998-07-23 Aeg Hausgeraete Gmbh Waschtrommel für eine Waschmaschine

Cited By (5)

* 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
WO2015027368A1 (zh) * 2013-08-29 2015-03-05 海尔集团公司 一种洗衣机内桶及洗衣机
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
DE602006020594D1 (de) 2011-04-21
EP1925704A1 (de) 2008-05-28
ES2362002T3 (es) 2011-06-27

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