EP3715522B1 - Tambour de lavage d'une machine à laver le linge et machine à laver le linge équipée d'un tel tambour - Google Patents

Tambour de lavage d'une machine à laver le linge et machine à laver le linge équipée d'un tel tambour Download PDF

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Publication number
EP3715522B1
EP3715522B1 EP19165272.6A EP19165272A EP3715522B1 EP 3715522 B1 EP3715522 B1 EP 3715522B1 EP 19165272 A EP19165272 A EP 19165272A EP 3715522 B1 EP3715522 B1 EP 3715522B1
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EP
European Patent Office
Prior art keywords
washing drum
drum
washing
laundry
bulges
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19165272.6A
Other languages
German (de)
English (en)
Other versions
EP3715522A1 (fr
Inventor
Thomas U JOHANSSON
Giovanni Colombera
Luca GUIOTTO
Vittorio Perosa
Marco Rigo
Andrea Putaggio
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.)
Electrolux Appliances AB
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Electrolux Appliances AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP19165272.6A priority Critical patent/EP3715522B1/fr
Priority to PL19165272.6T priority patent/PL3715522T3/pl
Priority to AU2020201474A priority patent/AU2020201474A1/en
Priority to CN202010213586.5A priority patent/CN111748961B/zh
Priority to US16/828,299 priority patent/US20200308752A1/en
Publication of EP3715522A1 publication Critical patent/EP3715522A1/fr
Application granted granted Critical
Publication of EP3715522B1 publication Critical patent/EP3715522B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • D06F21/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement 
    • D06F21/02—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement  about a horizontal axis
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • 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
    • 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 present invention concerns the field of laundry washing techniques.
  • the invention relates to a washing drum adapted to be rotatably mounted in a laundry washing machine.
  • laundry washing machines both "simple” laundry washing machines (i.e. laundry washing machines which can only wash and rinse laundry) and laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry), is widespread.
  • Laundry washing machine will refer to both a simple laundry washing machine and a laundry washing-drying machine.
  • Laundry washing machines generally comprise an external casing, or cabinet, provided with a washing tub which contains a washing drum where the laundry is placed. A loading/unloading door ensures access to the washing drum.
  • Washing drums of known type typically comprise a substantially cylindrical wall closed at one end by a substantially flat rear wall and presenting, on its other end, an opening closed by said loading/unloading door.
  • Cylindrical wall is typically provided with perforations/holes which allow the liquid flowing therethrough.
  • Said holes are typically and preferably homogeneously distributed on the wall of the drum. Furthermore, the cylindrical wall is also typically provided with bulges.
  • bulges and holes are arranged to increase the performance of the washing process.
  • the laundry hits and/or is stuck against the inner surface of the drum wall and water contained in the laundry is ejected outwardly through the holes by means of the centrifugal force for centrifugally dehydrating the laundry.
  • Shape of bulges may affect treatment of the laundry due to interaction with laundry.
  • EP1028189A2 discloses a drum for a washing machine, with a drum shell in which elevations on the inside of the drum shell are advantageously arranged in rows next to one another on the circumference of the drum shell, the elevations pointing towards the axis of rotation of the drum and alternating with depressions, so that so passage openings realized between elevations and depressions are linearly arranged aligned along the rotational axis of the drum.
  • DE102012204560 A1 discloses a drum for a washing machine, which drum shell has a structural pattern based at least in sections on a Penrose tiling to achieve an effective suppression of vibrations of the drum, thereby reducing deformation of the laundry drum compared to drums having a regular structuring and embossing.
  • EP1925704 A1 discloses a drum adapted to be rotatably mounted in a tub of a washing machine or washer dryer, with a cylindrical wall provided with perforations and with a plurality of bulges oriented towards the exterior of the drum and shaped as frustum of pyramid, wherein the perforations of the drum are centered within the bulges.
  • WO2013030394A discloses a drum that is suitable for using in laundry washing or laundry washing-drying machines and that comprises a cylindrical body, at least one hole located on the cylindrical body and at least one bulge which is located on the cylindrical body and extends from the surface of the cylindrical body towards the rotational axis of the drum, and the contour of which is shaped as a polygon.
  • Applicant has found that by providing a laundry washing machine comprising a washing tub external to a washing drum wherein the washing drum comprises a plurality of bulges and by providing said bulges with a squircle-shaped contour, it is possible to reach the mentioned objects.
  • the present invention relates, therefore, to a washing drum which is adapted to be rotatably mounted in a laundry washing machine wherein laundry to be washed may be placed, said washing drum comprising a tubular body wall apt to rotate around a rotational axis and said tubular body wall comprising at least one bulge protruding from said tubular body wall towards said rotational axis and at least one hole, wherein the contour of said at least one bulge at said tubular body wall has the shape of a squircle, wherein the reference axis of said squircle-shaped contour is inclined with respect to said rotational axis.
  • the squircle is preferably composed by four rounded corners joined by four slightly rounded sides.
  • the reference axis divides symmetrically two opposed slightly rounded sides.
  • the reference axis of the squircle-shaped contour is inclined with respect to the rotational axis to form an angle between 22,5° and 67,5° preferably an angle equal to 45°.
  • said at least one bulge comprises side walls extending from said contour and terminating at a bottom wall.
  • the washing drum comprises a plurality of bulges placed side by side, two adjacent bulges defining a channel therebetween.
  • said at least one hole is realized in said channel.
  • said at least one hole is realized in said side walls and/or said bottom wall.
  • the washing drum comprises a plurality of holes.
  • the holes are realized in the channel. In a further preferred embodiment of the invention, the holes are realized in the side walls and/or the bottom wall.
  • the side walls and/or the bottom wall are rounded shaped.
  • the washing drum comprises a plurality of bulges, said plurality of bulges being arranged in a row along a main axis.
  • the washing drum comprises one or more groups of bulges, said one or more groups comprising one or more rows of bulges aligned along a main axis.
  • two of said groups are separated by a smooth area.
  • the smooth area may be considered as a channel having a width preferably equal or larger than the width of a row of bulges.
  • the main axis is parallel to the rotational axis.
  • the main axis is inclined with respect to the rotational axis.
  • the height of the side walls is constant.
  • the height of the side walls varies.
  • the height of said side walls decreases continuously.
  • the bottom wall is parallel to the tubular body wall.
  • the bottom wall is not parallel to the tubular body wall.
  • the bottom wall is inclined with respect to the tubular body wall.
  • the present invention concerns a laundry washing machine comprising a washing tub external to a washing drum, wherein the washing drum is realized as described above.
  • the present invention has proved to be particularly advantageous when applied to laundry washing machines, as described below. It should in any case be underlined that the present invention is not limited to laundry washing machines. On the contrary, the present invention can be conveniently applied to laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry).
  • FIG. 1 a preferred embodiment of a washing drum 1 according to the invention which is adapted to be rotatably mounted in a laundry washing machine is shown.
  • the washing drum 1 preferably comprises a tubular body wall 10 apt to rotate around a rotational axis R, as better visible in Figure 2 .
  • the tubular body wall 10 is preferably cylindrically shaped.
  • the tubular body wall may by differently shaped, for example it may be frustum conical shaped and/or showing a rounded shape.
  • the tubular body wall 10 preferably comprises a rear end 12 closed by a rear wall 12 and a front end 14 presenting an opening 18 for loading/unloading laundry and preferably aligned with a loading/unloading door of the laundry washing machine (not shown).
  • the tubular body wall 10 is preferably made by metallic material, preferably made of stainless steel.
  • the tubular body wall 10 comprises bulges 20 protruding from the tubular body wall 10 towards the rotational axis R.
  • the tubular body wall 10 is metallic and bulges 20 are obtained by punching the tubular body wall 10.
  • the contour 30 of the bulge 20 at said tubular body wall 10 has the shape of a squircle.
  • Figure 4 shows a squircle in a cartesian coordinate system x and y.
  • the squircle substantially shows four rounded corners K1 ⁇ K4 joined by four slightly rounded sides S1 ⁇ S4.
  • the squircle is symmetrical and shows two lines of symmetry coinciding with said axis x and y.
  • the first line of symmetry x as a reference axis X of the squircle.
  • the reference axis as used in the present invention could indicate also the second line of symmetry y.
  • the reference axis X divides symmetrically two opposed slightly rounded sides S2, S4.
  • the squircle may be roughly symmetrical rather than perfectly symmetrical, in particular due to deformation caused by the punching process.
  • the bulge 20 preferably comprises side walls 32 extending from said contour 30 and terminating at a bottom wall 34.
  • Side and bottom walls 32, 34 preferably comprise smooth surfaces advantageously joined therebetween without sharp edges.
  • Side and bottom walls 32, 34 preferably comprise rounded surfaces with proper radii of curvature.
  • Rounded walls advantageously offer gentle treatment of the laundry.
  • the bulge 20 is opportunely oriented at the tubular body wall 10 so that the reference axis X of the squircle-shaped contour 30 is inclined with respect to the rotational axis R, as illustrated in Figure 5 .
  • the washing drum 1 is preferably rotated in clockwise C1 and counterclockwise C2 directions around the rotational axis R for centrifugally dehydrating the laundry placed therein.
  • the reference axis X of the squircle-shaped contour 30 is inclined with respect to the rotational axis R of the washing drum 1 to form an angle A.
  • the angle A is equal to 45°.
  • the angle is comprised between 22,5° and 67,5°.
  • the tubular body wall 10 comprises a plurality bulges 20 placed side by side to define a desired pattern.
  • bulges 20 are preferably defined almost all over the entire tubular body wall 10 and arranged in a sort of inclined row-column matrix. Two adjacent bulges 20 preferably define therebetween a respective channel 50.
  • the channel 50 is defined by side walls 32 of two adjacent bulges 20.
  • Each channel 50 is therefore preferably aligned along a direction inclined with respect to the rotational axis R.
  • Figure 10 shows a first different pattern obtained by bulges 20 displaced in groups G and arranged in inclined row-column spaced one to the other over the tubular body wall 110.
  • Bulges 20 are preferably arranged in rows along a main axis Y.
  • the main axis Y is parallel to the rotational axis R.
  • Each area A may also be considered as a large channel, preferably with a width equal or larger than a corresponding row of bulges, preferably aligned along the rotational axis R.
  • Figure 11 shows a second different pattern obtained by bulges 20 displaced in inclined rows H spaced one to the other over the tubular body wall 210.
  • Bulges 20 are preferably arranged in rows along a main axis Y'.
  • the main axis Y' is inclined with respect to the rotational axis R.
  • Each area A' may also be considered as a channel, preferably with a width equal or larger than a corresponding row of bulges, preferably aligned along a direction inclined with respect to the rotational axis R.
  • the tubular body wall 10 preferably comprises distributed holes 70. Holes 70 are preferably obtained by punching the tubular body wall 10.
  • Holes 70 help discharging of water from inside of the washing drum 4 to the outside to centrifugally dehydrating the laundry placed therein.
  • holes 70 are realized in channels 50, as better visible in Figures 3 and 5 .
  • holes 70 are realized only in channels 50.
  • holes 70 are differently distributed over the tubular body wall.
  • holes 70 in the tubular body wall 310 are additionally or alternatively realized at side walls 32 and/or bottom walls 34 of the bulges 20.
  • the bulges 20 thanks to their shape and orientation, as described above, enhances channelling away of water when the washing drum 1 rotates, either in clockwise direction C1 or counterclockwise direction C2.
  • the bulges 20 thanks to their shape and orientation, as described above, offer gentle treatment of the laundry when the washing drum 1 rotates, either in clockwise direction C1 or counterclockwise direction C2.
  • the height D of the side walls is preferably constant, or substantially constant, and the bottom wall 34 is preferably parallel, or substantially parallel, to the tubular body wall 10.
  • the height of the side walls varies, and the bottom wall preferably is not parallel to the tubular body wall.
  • the height of the side walls 32' decreases continuously and the bottom wall 34' of the bulge 20' is inclined with respect to the tubular body wall 10.
  • the height of the side walls 32' decreases continuously going from the first corner K1 to the third corner K3 (as it can be deduced by comparing distances D1 and D2 depicted in Figure 8A ).
  • the bottom wall 34' of the bulge 20' is therefore preferably sloped going from the first corner K1 to the third corner K3.
  • mechanical treatment of the laundry is differentiated between clockwise and counterclockwise rotations of the washing drum 1.
  • the present invention allows all the set objects to be achieved.
  • it makes it possible to provide a washing drum increasing dehydration performance of the laundry during a washing cycle compared to known laundry washing machines.

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

Claims (15)

  1. Tambour de lavage (1) qui est conçu pour être monté de manière rotative dans une machine à laver le linge dans laquelle le linge à laver peut être placé, ledit tambour de lavage (1) comprenant une paroi de corps tubulaire (10 ; 110 ; 210) pouvant tourner autour d'un axe de rotation (R) et ladite paroi de corps tubulaire (10 ; 110 ; 210) comprenant au moins un renflement (20 ; 20') faisant saillie de ladite paroi de corps tubulaire (10 ; 110 ; 210) vers ledit axe de rotation (R) et au moins un trou (70), le contour dudit au moins un renflement (20 ; 20') au niveau de ladite paroi de corps tubulaire (10 ; 110 ; 210) ayant la forme d'un squircle, caractérisé en ce que l'axe de référence (X) joignant les points médians de côtés opposés dudit contour en forme de squircle est incliné par rapport audit axe de rotation (R) .
  2. Tambour de lavage (1) selon la revendication 1, caractérisé en ce que ledit axe de référence (X) dudit contour en forme de squircle est incliné par rapport audit axe de rotation (R) pour former un angle entre 22,5° et 67,5°, de préférence un angle égal à 45°.
  3. Tambour de lavage (1) selon la revendication 1 ou 2, caractérisé en ce que ledit au moins un renflement (20 ; 20') comprend des parois latérales (32 ; 32') s'étendant depuis ledit contour et se terminant au niveau d'une paroi inférieure (34 ; 34').
  4. Tambour de lavage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une pluralité dudit au moins un renflement (20 ; 20') placé côte à côte, deux renflements (20 ; 20') adjacents définissant un canal (50 ; A ; A') entre eux.
  5. Tambour de lavage (1) selon la revendication 4, caractérisé en ce que ledit au moins un trou (70) est pratiqué dans ledit canal (50).
  6. Tambour de lavage (1) selon l'une quelconque des revendications 3 à 5, caractérisé en ce que ledit au moins un trou (70) est pratiqué dans lesdites parois latérales (32 ; 32') et/ou ladite paroi de fond (34 ; 34').
  7. Tambour de lavage (1) selon l'une quelconque des revendications 3 à 6, caractérisé en ce que lesdites parois latérales (32 ; 32') et/ou ladite paroi de fond (34 ; 34') sont de forme arrondie.
  8. Tambour de lavage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une pluralité dudit au moins un renflement (20 ; 20'), ladite pluralité de renflements (20 ; 20') étant disposée en une rangée le long d'un axe principal (Y ; Y').
  9. Tambour de lavage (1) selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend un ou plusieurs groupes (G ; H) de renflements (20 ; 20'), lesdits un ou plusieurs groupes (G ; H) comprenant une ou plusieurs rangées de renflements (20 ; 20') alignés le long d'un axe principal (Y ; Y').
  10. Tambour de lavage (1) selon la revendication 9, caractérisé en ce que deux groupes (G ; H) desdits un ou plusieurs groupes (G ; H) sont séparés par une zone lisse (A ; A').
  11. Tambour de lavage (1) selon l'une quelconque des revendications 8 à 10, caractérisé en ce que ledit axe principal (Y) est parallèle audit axe de rotation (R).
  12. Tambour de lavage (1) selon l'une quelconque des revendications 8 à 10, caractérisé en ce que ledit axe principal (Y') est incliné par rapport audit axe de rotation (R).
  13. Tambour de lavage (1) selon l'une quelconque des revendications 3 à 12, caractérisé en ce que la hauteur (D) desdites parois latérales (32) est constante.
  14. Tambour de lavage (1) selon l'une quelconque des revendications 3 à 12, caractérisé en ce que la hauteur desdites parois latérales (32') varie.
  15. Machine à laver le linge comprenant une cuve de lavage externe à un tambour de lavage (1), caractérisée en ce que ledit tambour de lavage (1) est réalisé selon l'une quelconque des revendications précédentes.
EP19165272.6A 2019-03-26 2019-03-26 Tambour de lavage d'une machine à laver le linge et machine à laver le linge équipée d'un tel tambour Active EP3715522B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19165272.6A EP3715522B1 (fr) 2019-03-26 2019-03-26 Tambour de lavage d'une machine à laver le linge et machine à laver le linge équipée d'un tel tambour
PL19165272.6T PL3715522T3 (pl) 2019-03-26 2019-03-26 Bęben piorący do urządzenia do prania pranych artykułów i urządzenie do prania pranych artykułów wyposażone w taki bęben
AU2020201474A AU2020201474A1 (en) 2019-03-26 2020-02-28 Washing drum for a laundry washing machine and laundry washing machine equipped with such drum
CN202010213586.5A CN111748961B (zh) 2019-03-26 2020-03-24 用于洗衣机的洗涤滚筒和配备有该滚筒的洗衣机
US16/828,299 US20200308752A1 (en) 2019-03-26 2020-03-24 Washing drum for a laundry washing machine and laundry washing machine equipped with such drum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19165272.6A EP3715522B1 (fr) 2019-03-26 2019-03-26 Tambour de lavage d'une machine à laver le linge et machine à laver le linge équipée d'un tel tambour

Publications (2)

Publication Number Publication Date
EP3715522A1 EP3715522A1 (fr) 2020-09-30
EP3715522B1 true EP3715522B1 (fr) 2022-05-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19165272.6A Active EP3715522B1 (fr) 2019-03-26 2019-03-26 Tambour de lavage d'une machine à laver le linge et machine à laver le linge équipée d'un tel tambour

Country Status (5)

Country Link
US (1) US20200308752A1 (fr)
EP (1) EP3715522B1 (fr)
CN (1) CN111748961B (fr)
AU (1) AU2020201474A1 (fr)
PL (1) PL3715522T3 (fr)

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DE102021200987A1 (de) * 2021-02-03 2022-08-04 BSH Hausgeräte GmbH Verfahren zum Herstellen einer Wäschetrommel mit lagegenauer Positionierung einer Prägestruktur und Flutlöchern zueinander, sowie Wäschetrommel

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IT1259238B (it) * 1992-12-07 1996-03-11 Zanussi Elettrodomestici Lavabiancheria con vasca perfezionata in plastica.
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EP1925704B1 (fr) * 2006-11-24 2011-03-09 Whirlpool Corporation Tambour de machine à laver et machine à laver avec un tel tambour.
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CN207295246U (zh) * 2017-08-23 2018-05-01 上海仕操洗涤有限公司 一种医院用滚筒式洗涤装置

Also Published As

Publication number Publication date
AU2020201474A1 (en) 2020-10-15
PL3715522T3 (pl) 2022-09-12
US20200308752A1 (en) 2020-10-01
EP3715522A1 (fr) 2020-09-30
CN111748961A (zh) 2020-10-09
CN111748961B (zh) 2024-01-19

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