EP2281081B1 - Method and device for treating laundry in a washing machine or washing/drying machine or clothes dryer - Google Patents

Method and device for treating laundry in a washing machine or washing/drying machine or clothes dryer Download PDF

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Publication number
EP2281081B1
EP2281081B1 EP08806864A EP08806864A EP2281081B1 EP 2281081 B1 EP2281081 B1 EP 2281081B1 EP 08806864 A EP08806864 A EP 08806864A EP 08806864 A EP08806864 A EP 08806864A EP 2281081 B1 EP2281081 B1 EP 2281081B1
Authority
EP
European Patent Office
Prior art keywords
machine
laundry
steam
washing
drum
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
EP08806864A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2281081A1 (en
Inventor
Costantino Mariotti
Mariano Funari
Giovanni Bombardieri
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
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 Indesit Co SpA filed Critical Indesit Co SpA
Priority to PL08806864T priority Critical patent/PL2281081T3/pl
Publication of EP2281081A1 publication Critical patent/EP2281081A1/en
Application granted granted Critical
Publication of EP2281081B1 publication Critical patent/EP2281081B1/en
Active legal-status Critical Current
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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/30—Drying processes 
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/38—Conditioning or finishing, e.g. control of perfume injection
    • D06F2105/40—Conditioning or finishing, e.g. control of perfume injection using water or steam
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D06F2105/60—Audible signals
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/62—Stopping or disabling machine operation
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • 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
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/40—Steam generating arrangements

Definitions

  • the present invention relates to a method for treating laundry in a washing machine or washing/drying machine or clothes dryer.
  • washing machines In order to eliminate, or at least smooth these creases, washing machines are known, such as the one described in patent application EP 1507028 by LG ELECTRONICS INC., which carry out a crease smoothing step by supplying heat to the laundry within the washing machine itself.
  • the crease smoothing step is subdivided into two distinct cycles: an initial steam cycle, lasting for a preset time (e.g. two minutes) as the drum is rotating, and a subsequent laundry cooling cycle taking place with no steam production as the drum is rotating.
  • a preset time e.g. two minutes
  • the drum is stopped and the user is informed that the crease smoothing step has been completed by an appropriate sound or luminous alarm, so that the laundry can be removed.
  • FIG. 1 This crease smoothing step is illustrated in Fig. 1 , which clearly shows that steam is supplied to the laundry during the steam cycle (from time t p1 to time t p2 ), which is then stopped and followed by the cooling cycle (from time t p2 to time t p3 ), at the end of which (time t p3 ) the alarm goes off.
  • Said cycles comprise a single operational step wherein the laundry is subjected to a steam flow in order to remove any smells and to smooth the creases.
  • the object of the present invention is to provide an alternative method and an alternative laundry washing machine which allow to overcome the above-mentioned problems.
  • the present invention is based on the idea of an alarm going off at the end of an optimal duration of the steam cycle, while however continuing the latter even after the alarm has gone off.
  • the steam cycle goes on until the user stops it manually.
  • the steam cycle ends when a predetermined time has elapsed after the alarm has gone off.
  • Fig. 1 illustrates the above-described crease smoothing cycle according to the prior art; without further repetitions, the alarm signal goes off at the end of the cooling cycle that follows the steam cycle.
  • FIG. 2 With reference to Fig. 2 , there is shown a simplified diagram which is useful to understand the method in accordance with the teachings of the present invention.
  • the following example refers to a washing machine wherein the laundry to be treated is placed inside a drum which is rotated by a motor within a wash tub.
  • the drum rotation and in general the operation of the various machine components are controlled by a control unit adapted to implement the method described below.
  • the laundry treatment method (e.g. used for smoothing creases) starts at time t 1 , when steam is supplied into the tub of the washing machine for the purpose of smoothing the laundry loaded therein.
  • the crease smoothing process begins at time t 1 with a steam cycle 1, which goes on until time t 3 .
  • the machine drum is preferably kept turning, more preferably in alternate directions.
  • Time t 2 corresponds to the instant when it is believed that the creases have been sufficiently smoothed.
  • the time interval between t 1 and t 2 thus corresponds to an optimal duration of the steam cycle; said duration may be preset in the washing machine during the assembly cycle of the machine itself, or it may be chosen by a user through suitable controls fitted on the machine.
  • Said optimal duration t 1 -t 2 may for example be selected as a function of load, in particular of the type and/or quantity of laundry.
  • an alarm signal 2 goes off which preferably lasts until time t 3 ; the alarm may be audible, visual or of any other kind suitable for drawing the user's attention.
  • the alarm may be continuous over time, or else goes off at regular time intervals, e.g. every 30 seconds.
  • Time t 3 is the moment when a machine stop signal is generated.
  • Said signal is preferably generated when the user acts upon an appropriate machine stop control.
  • the stop signal is generated automatically by the machine control unit when the time interval between t 2 and t 3 exceeds a predetermined value preset during the assembly cycle of the machine itself or included in a program selected by the user.
  • the washing or washing/drying machine implementing the method according to the present invention is provided with evaporation means controlled by the machine control unit.
  • Said evaporation means may, for example, comprise a steam producing boiler in which water is evaporated and then delivered into the tub.
  • steam may be produced by the very same electric resistance that warms up the wash water in the tub, as described in patent application EP1275767 , to which reference is made herein.
  • the evaporation means therefore comprise the electric resistance that warms up the water in the tub.
  • the corresponding quantity of steam Q 1 applied to the laundry during this time interval is that which is believed to be most appropriate for the steam cycle.
  • the alarm is activated, while at the same time the steam flow rate is decreased to a value P 2 smaller than P 1 ; said flow rate is required for keeping the creases sufficiently smoothed and to prevent/reduce the formation of new creases.
  • a further variant, which is advantageous in that it reduces the time in which no steam is applied to the laundry before the latter is removed by the user, is that of quickly: discharging the steam immediately after the user has stopped the steam cycle.
  • washing and washing/drying machines are normally fitted with a safety device which will keep the load door of the machine locked if the temperature within the tub is high, e.g. due to the presence of residual steam.
  • the washing or washing/drying machine is provided with means for accelerating the discharge of the steam externally; said means may, for example, comprise a fan specially operated for this purpose, or an additional door preferably located on the rear side of the machine, which opens at the end of the steam cycle.
  • the dry (or slightly damp) laundry is loaded into the drum of the machine (e.g. a clothes dryer) and subjected to a steam flow generated by the machine through evaporation means such as, for example, a boiler.
  • evaporation means such as, for example, a boiler.
  • the machine then carries out a predetermined refresh cycle, at the end of which an alarm signal goes off in order to inform the user that the laundry can be removed from the machine.
  • the treatment is carried out by supplying steam into the drum and to the laundry therein.
  • the evaporation means are activated for at least a non-null time interval (t 2 -t 3 ) after the alarm signal has gone off, thus generating additional steam and subjecting the laundry to a further steam flow following the alarm signal.
  • the refreshing method may also be subject to the very same variations previously described with reference to the crease smoothing method:

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Treatment Of Fiber Materials (AREA)
EP08806864A 2008-04-30 2008-07-31 Method and device for treating laundry in a washing machine or washing/drying machine or clothes dryer Active EP2281081B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08806864T PL2281081T3 (pl) 2008-04-30 2008-07-31 Metoda i urządzenie do traktowania prania w pralce, pralko-suszarce lub suszarce do prania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000327A ITTO20080327A1 (it) 2008-04-30 2008-04-30 Metodo e dispositivo per addolcire le pieghe nei panni in una macchina lavatrice o lavasciuga
PCT/IB2008/001987 WO2009133424A1 (en) 2008-04-30 2008-07-31 Method and device for treating laundry in a washing machine or washing/drying machine or clothes dryer

Publications (2)

Publication Number Publication Date
EP2281081A1 EP2281081A1 (en) 2011-02-09
EP2281081B1 true EP2281081B1 (en) 2011-12-14

Family

ID=40158198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08806864A Active EP2281081B1 (en) 2008-04-30 2008-07-31 Method and device for treating laundry in a washing machine or washing/drying machine or clothes dryer

Country Status (7)

Country Link
EP (1) EP2281081B1 (pl)
AT (1) ATE537288T1 (pl)
ES (1) ES2379166T3 (pl)
IT (1) ITTO20080327A1 (pl)
PL (1) PL2281081T3 (pl)
RU (1) RU2458194C1 (pl)
WO (1) WO2009133424A1 (pl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10443181B2 (en) 2014-12-30 2019-10-15 Whirlpool Emea S.P.A. Washing/drying machine with a spider-shaped device for cleaning an air filter
US10801157B2 (en) 2014-12-30 2020-10-13 Whirlpool Emea S.P.A. Washing/drying machine with a device for cleaning an air filter

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20131099A1 (it) 2013-12-31 2015-07-01 Indesit Co Spa Macchina lavasciugatrice con sistema di prevenzione dell¿intasamento di un filtro dell¿aria
ITTO20131101A1 (it) 2013-12-31 2015-07-01 Indesit Co Spa Macchina lavasciugatrice con dispositivo di pulizia di un filtro dell'aria di asciugatura
WO2015159173A1 (en) 2014-04-17 2015-10-22 Indesit Company S.P.A. Method for cleaning an air filter in a washing/drying machine and machine for its execution

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9126200D0 (en) * 1991-12-10 1992-02-12 Hart Douglas R Automatic cycle terminator for dryers
CH695383A5 (de) * 2001-07-10 2006-04-28 V Zug Ag Wäschetrockner oder Waschautomat mit Bedampfungsvorrichtung.
KR100531379B1 (ko) * 2003-08-13 2005-11-28 엘지전자 주식회사 드럼 세탁기의 세탁물 구김 제거 방법
KR20060055222A (ko) * 2004-11-18 2006-05-23 삼성전자주식회사 세탁기 및 그 제어방법

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10982379B2 (en) 2014-11-30 2021-04-20 Whirlpool Emea S.P.A. Washing/drying machine with a device for cleaning an air filter
US10443181B2 (en) 2014-12-30 2019-10-15 Whirlpool Emea S.P.A. Washing/drying machine with a spider-shaped device for cleaning an air filter
US10801157B2 (en) 2014-12-30 2020-10-13 Whirlpool Emea S.P.A. Washing/drying machine with a device for cleaning an air filter

Also Published As

Publication number Publication date
RU2458194C1 (ru) 2012-08-10
ATE537288T1 (de) 2011-12-15
ITTO20080327A1 (it) 2009-11-01
ES2379166T3 (es) 2012-04-23
EP2281081A1 (en) 2011-02-09
WO2009133424A1 (en) 2009-11-05
PL2281081T3 (pl) 2012-05-31
RU2010148753A (ru) 2012-06-10

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