EP2479334A1 - Verfahren zum Waschen von empfindlichen Textilartikeln unter Verwendung einer Waschmaschine - Google Patents

Verfahren zum Waschen von empfindlichen Textilartikeln unter Verwendung einer Waschmaschine Download PDF

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Publication number
EP2479334A1
EP2479334A1 EP12000273A EP12000273A EP2479334A1 EP 2479334 A1 EP2479334 A1 EP 2479334A1 EP 12000273 A EP12000273 A EP 12000273A EP 12000273 A EP12000273 A EP 12000273A EP 2479334 A1 EP2479334 A1 EP 2479334A1
Authority
EP
European Patent Office
Prior art keywords
drum
articles
washed
washing
washing liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12000273A
Other languages
English (en)
French (fr)
Other versions
EP2479334B1 (de
Inventor
Mauro MANCINI
Mariangiola Dottori
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 EMEA SpA
Original Assignee
Indesit Co SpA
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Publication date
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Publication of EP2479334A1 publication Critical patent/EP2479334A1/de
Application granted granted Critical
Publication of EP2479334B1 publication Critical patent/EP2479334B1/de
Not-in-force legal-status Critical Current
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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
    • 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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for

Definitions

  • This invention relates to a method for washing delicate textile articles using a washing machine comprising a washing compartment in which a rotary drum is positioned.
  • the articles inside the drum are moved when the drum is rotated and, in particular, they are moved both through friction between the articles and the inner wall of the drum which lifts the articles by contact and through a drawing action applied by specific drawing elements located at a certain distance from each other along the full axial extension of the drum.
  • the articles to be washed are lifted to the highest point of the drum and then drop to the bottom again by gravity.
  • the prior art teaches the use of certain measures such as, for example, not heating the water to a particularly high temperature, rotating the drum at a low speed to avoid crumpling the fibres excessively or disabling the spin drying function.
  • tellization Another measure used for washing delicate articles is what is known as “satellization”, that is to say, rotating the drum at a particular speed, slower than the speed used for spin drying but still allowing the centrifugal force transmitted to the articles by the drum to neutralize the force of gravity. This reduces the mechanical action on the articles, forcing the articles to be washed to adhere to the wall of the drum, rotating as one therewith but without moving relative to it and thus preventing the articles from rubbing continuously against the inner wall of the drum.
  • washing programmes have been developed which adopt all or nearly all of the above mentioned measures, the drawbacks linked with the shrinkage and/or relaxation of delicate fabrics continue to constitute a problem, albeit to a lesser extent.
  • This invention has for an aim to overcome the above mentioned washing problems.
  • the aim of this invention is therefore to provide a method for washing delicate textile articles using a washing machine and which reduces damage to the fibres of delicate articles (wool, silk, articles with sequins or inserts of various kinds, and so on), also preventing dimensional alterations (shrinkage and/or relaxation of the fibres) detachment of fabric decorations or surface scuffing making the articles unsuitable for wearing.
  • the numeral 1 denotes in its entirety a washing machine 1 comprising a washing compartment 2 in which a rotary drum 3 that rotates about an axis 3a is positioned and in which the method for washing delicate articles according to this invention can be implemented.
  • a user Before starting any washing cycle, a user must place the articles 4 to be washed into the rotary drum 3 and fill the detergent in the required amount into the drawer 8 or directly into the drum 3.
  • the user also selects the type of wash the washing machine 1 is to carry out.
  • One step in the washing cycle performed by the washing machine 1 is that of introducing washing liquid 5 into the drum 3.
  • Introducing a first quantity of washing liquid advantageously allows soaking of the articles to be washed.
  • the drum 3 is then made to rotate at a predetermined speed, lower than the spin drying speed, so as to facilitate soaking of the articles being washed.
  • the drum 3 is set in rotation after the first predetermined quantity of washing liquid has been introduced into the compartment 2.
  • the drum 3 rotates at a speed such as to make the articles complete at least half a turn, lifting them from the lowermost point to a point near the uppermost point of the drum, where the articles 4 fall down again by gravity.
  • This mechanical action may cause damage to delicate or ultra delicate articles.
  • the use of a step known as "satellization" of the articles 4 is therefore advantageous.
  • the normal speed of rotation of the drum 3 is increased to a value such that the centrifugal force equals or, if necessary, slightly exceeds, the force of gravity.
  • the step of introducing a washing liquid comprises flooding the rotary drum 3 with a further quantity of washing liquid 5.
  • the total quantity of washing liquid inside the drum 3 is such as to impart to the articles to be washed 4 a thrusting action which allows them to come away from the inner wall 6 of the drum 3, since they receive from the washing liquid an Archimedes thrust from the bottom upwards.
  • the step of introducing a washing liquid may therefore be split into two or more different stages (which may be separated at least by the step of making the drum 3 rotate).
  • the thrusting action applied by the drum 3 on the articles is particularly delicate because there is a layer 9 of washing liquid between the wall 6 of the drum 3 as it rotates and the core of articles 4 being washed.
  • the layer 9 of washing liquid 5 transfers to the articles 4 being washed a gentle rotational movement imparted by the drum 3.
  • the amount of water in the washing compartment 2 to achieve this effect of the articles floating in the drum 3 is variable from 24 to 28 litres, preferably 26 litres.
  • the drum 3 rotates at a speed of between 18 and 32 revolutions per minute (rpm), preferably between 22 and 28 rpm.
  • the speed of rotation of the drum 3 must be slow at all times, remaining, for example, at a preferred value of 25 rpm.
  • the method described also comprises at least one pause step during which the drum 3 remains stationary, allowing the washing liquid and the detergent to delicately pass through the fibres.
  • the entire washing cycle comprises a plurality of steps of rotating the drum 3 alternated with a plurality of drum pause steps.
  • the drum 3 rotation and pause steps are suitably combined with each other and their duration varies according to the type of article to be washed.
  • a preferred but non-limiting combination comprises rotation steps with duration of three time units each, alternated with pause steps each having a duration of eight time units.
  • the drum may have drawing bands 7 (known as "lifters” in the jargon of the trade) located on the inner wall 6 of the drum 3, parallel with the axis 3a of rotation of the drum itself,
  • the lifters 7 are located only along a portion of the entire axial length of the inner wall 6 of the drum (typically towards the bottom of the drum, as shown in Figure 2 ) and this may produce in the washing water inside the drum 3 a rotational component according to an axis transversal to the axis 3a of rotation of the drum 3.
  • the washing liquid 5 is heated, during the entire washing cycle, to a temperature between 25°C and 30°C.
  • the method for washing delicate or ultra delicate articles comprises a first step of filling water or washing liquid 5 into the washing compartment 2 up to a first predetermined level with the drum 3 stationary and simultaneously heating the water (through the agency of an electrical heating element in thermal contact with the washing compartment) to a predetermined and preferred washing temperature, for example, 28°C.
  • the amount of water corresponding to the first level is approximately 5 litres.
  • the drum 3 then satellizes the load of articles 4 to be washed (advantageously at approximately 88 rpm) for 2 minutes and, at the same time, approximately 3 litres of water are introduced and heated to a predetermined temperature.
  • the first filling step comprises introducing into the washing compartment 2 water and detergent mixed together (to form the washing liquid 5).
  • the detergent is in a relatively high concentration and is activated when a predetermined temperature threshold is exceeded (in effect, the temperature of the washing liquid 5 is approximately 28 °C and is greater than the predetermined temperature threshold).
  • this step has the purpose of filling approximately 8 litres of washing liquid into the compartment 2 so as to completely soak the articles 4 to be washed and keeping them at the required temperature without subjecting them to any mechanical action: the water and detergent pass through the fibres delicately while satellization forces the articles to adhere to the inner wall 6 of the drum 3 but without moving relative to it as it rotates.
  • the right quantity of foam is formed so as to contribute to making more delicate the light mechanical action which will be applied in the later steps.
  • the drum 3 stops and, if necessary, is allowed to return to the predetermined, preferred washing temperature.
  • a certain quantity of water is added (conveniently until reaching a second predetermined level) to enable the load of articles to be lifted by means of an Archimedes thrust.
  • the reaching of the second predetermined level corresponds to approximately 26 litres of water in the drum.
  • the next step, of floating has a duration variable between 25 and 30 minutes, for example 27 minutes, and at the same time the washing liquid 5 introduced into the drum is heated to the predetermined, preferred washing temperature.
  • the drum is moved at a variable speed between 20 and 27 revolutions per minute (rpm), for example 25 rpm.
  • the washing liquid 5 is drained out with the drum 3 stationary.
  • this is followed by at least one rinse, preferably two rinses, with duration 8-12 minutes, preferably 10 minutes, with rotational movement at the same slow speed, for example approximately 25 rpm, and alternating steps of rotating the drum 3 with steps of pausing it.
  • Rinsing is terminated with a step of satellizing the articles (for example at a variable speed of between 90 and 100 rpm, preferably 96 rpm) with the drain pump running. Satellization of the articles, in combination with the draining out step, helps remove the right quantity of water from the load, so that the articles do not drip when they are taken out, while at the same time preventing the centrifugal force from causing the decorative elements from being pulled off the articles.
  • the washing method according to the invention is selectable from a list of distinct washing cycles for delicate or ultra delicate products.
  • This invention achieves the preset aims and overcomes the above mentioned drawbacks of the prior art.
  • the method according to the invention makes it possible to wash delicate articles (wool, silk, articles with sequins or inserts of various kinds, and so on), considerably reducing damage to the fibres and also preventing dimensional alterations (shrinkage and/or relaxation of the fibres) or surface scuffing of the articles.
  • the method described also prevents decorative items, if any, applied to the articles from being detached during washing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
EP12000273.8A 2011-01-21 2012-01-18 Verfahren zum Waschen von empfindlichen Textilartikeln unter Verwendung einer Waschmaschine Not-in-force EP2479334B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000002A ITRN20110002A1 (it) 2011-01-21 2011-01-21 Metodo di lavaggio di capi tessili delicati mediante lavabiancheria automatica

Publications (2)

Publication Number Publication Date
EP2479334A1 true EP2479334A1 (de) 2012-07-25
EP2479334B1 EP2479334B1 (de) 2017-07-12

Family

ID=43975573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12000273.8A Not-in-force EP2479334B1 (de) 2011-01-21 2012-01-18 Verfahren zum Waschen von empfindlichen Textilartikeln unter Verwendung einer Waschmaschine

Country Status (3)

Country Link
EP (1) EP2479334B1 (de)
IT (1) ITRN20110002A1 (de)
RU (1) RU2605678C2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2835465A3 (de) * 2013-08-02 2015-04-08 Samsung Electronics Co., Ltd Waschmaschine mit Reinigungsmittelversorgungsvorrichtung und Steuerungsverfahren dafür
ITPR20130088A1 (it) * 2013-11-07 2015-05-08 Indesit Co Spa Metodo di trattamento di capi tessili.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09276582A (ja) * 1996-02-15 1997-10-28 Matsushita Electric Ind Co Ltd 洗濯機
EP1433887A1 (de) * 2002-12-26 2004-06-30 Lg Electronics Inc. Trommelwaschmaschine mit einer Vielzahl von Mitnehmern
EP1502982A2 (de) * 2003-07-28 2005-02-02 Lg Electronics Inc. Waschmaschine
EP1860225A1 (de) * 2005-03-15 2007-11-28 Kabushiki Kaisha Kyotosangyo Reinigungsverfahren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09276582A (ja) * 1996-02-15 1997-10-28 Matsushita Electric Ind Co Ltd 洗濯機
EP1433887A1 (de) * 2002-12-26 2004-06-30 Lg Electronics Inc. Trommelwaschmaschine mit einer Vielzahl von Mitnehmern
EP1502982A2 (de) * 2003-07-28 2005-02-02 Lg Electronics Inc. Waschmaschine
EP1860225A1 (de) * 2005-03-15 2007-11-28 Kabushiki Kaisha Kyotosangyo Reinigungsverfahren

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2835465A3 (de) * 2013-08-02 2015-04-08 Samsung Electronics Co., Ltd Waschmaschine mit Reinigungsmittelversorgungsvorrichtung und Steuerungsverfahren dafür
US9970142B2 (en) 2013-08-02 2018-05-15 Samsung Electronics Co., Ltd. Washing machine having detergent supply device and method of controlling the same
ITPR20130088A1 (it) * 2013-11-07 2015-05-08 Indesit Co Spa Metodo di trattamento di capi tessili.
WO2015068109A1 (en) * 2013-11-07 2015-05-14 Indesit Company S.P.A. Treatment method for treating textile articles

Also Published As

Publication number Publication date
EP2479334B1 (de) 2017-07-12
RU2012101860A (ru) 2013-07-27
RU2605678C2 (ru) 2016-12-27
ITRN20110002A1 (it) 2012-07-22

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