EP0542137B1 - Method for the treatment of laundry in a laundry washer/drier combination - Google Patents

Method for the treatment of laundry in a laundry washer/drier combination Download PDF

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Publication number
EP0542137B1
EP0542137B1 EP92118987A EP92118987A EP0542137B1 EP 0542137 B1 EP0542137 B1 EP 0542137B1 EP 92118987 A EP92118987 A EP 92118987A EP 92118987 A EP92118987 A EP 92118987A EP 0542137 B1 EP0542137 B1 EP 0542137B1
Authority
EP
European Patent Office
Prior art keywords
drum
rotated
rpm
laundry
speed
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.)
Expired - Lifetime
Application number
EP92118987A
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German (de)
English (en)
French (fr)
Other versions
EP0542137A1 (en
Inventor
Emanuele Sacconato
Silvano Cimetta
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 Zanussi Elettrodomestici SpA
Original Assignee
Zanussi Elettrodomestici 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 Zanussi Elettrodomestici SpA filed Critical Zanussi Elettrodomestici SpA
Publication of EP0542137A1 publication Critical patent/EP0542137A1/en
Application granted granted Critical
Publication of EP0542137B1 publication Critical patent/EP0542137B1/en
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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/007—Methods for washing, rinsing or spin-drying for spin-drying only

Definitions

  • the invention relates to a method for the treatment of laundry in a laundry washer/drier combination, as defined in the preamble part of claim 1.
  • Known laundry washer/drier combinations are designed for the sequential execution of laundering and drying operations.
  • the drum containing the laundry is rotated at a low laundering speed in alternating directions, and during the final rinsing operation, it is rotated at an increased spin-drying speed for effectively squeezing the laundry partly dry prior to its being dried in the conventional manner.
  • a laundry and dryer machine which is able to operate at speeds between 500 and 780 rpm is known.
  • a plurality of operational steps is executed to prepare the laundry for the drying operation.
  • the drum is rotated at a comparatively low speed of 50 to 120 rpm
  • the second step is characterized by several bursts in which the drum is rotated for a short time with a rotational speed of up to 480 rpm.
  • a third step follows in which after a slowly increasing rotational speed from 50 to 150 rpm, the drum is rotated at a constant speed of about 780 rpm.
  • the drum is rotated in alternating directions at a low speed of about 50 rpm.
  • the rotation of the drum at the spin-drying speed may, particularly in the case of machines operating at very high spin-drying speeds of the order of 1200 to 1500 rpm, lead to the undesirable result of the laundry adhering to the inner walls of the drum, giving rise to difficulties with regard to detaching the laundry from the drum walls at the end of the spin-drying operation.
  • the laundry may exhibit the tendency to accumulate in separate areas of the drum's inner wall, rather than being evenly distributed over the entire area of the inner wall surface of the drum as would be desirable for permitting it to be rapidly and substantially uniformly dried.
  • the uneven distribution of the laundry may again result in its being yellowed and/or partially scorched in the course of the subsequent drying operation.
  • This laundry treatment method is particularly applicable to laundry washer/drier combinations operating at elevated spin-drying speeds of the drum and includes the execution at the end of the various laundering operations of any selected laundering cycle of the operative steps to be described as follows:
  • the operative steps of the present laundry treatment method are initiated subsequent to the charge of water for the final rinsing operation having been admitted to the tub enclosing the drum containing the laundry, by rotating the drum at a low speed in alternating directions.
  • this final rinsing operation is indicated at A and has a duration of for example three minutes, during which the drum is rotated at a speed of 55 rpm. with its direction of rotation being reversed at 8 sec. intervals.
  • the rinsing water is completely discharged from the tub during a first step indicated as phase B and having a maximum duration of for example 20 to 40 sec..
  • the drum continues to be alternatingly rotated at low speed, in the present example for a period of 4 sec. in one direction and for 12 sec. in the opposite direction, at a speed of 55 rpm..
  • the drum is rotated in a series of short bursts of progressively increasing spin-drying speeds separated from one another by intervals during which the drum is rotated at low speed in alternating directions.
  • the present method provides the execution of four such spin-drying bursts at rotary speeds of 400, 600, 800 and 1000 rpm..
  • the drum is initially rotated at a low speed of in the present example 55 rpm, with only a single rotation in each direction for a duration of 3 sec., followed by a short burst, in the present example of a duration of 4 sec., of rotation at the spin-drying speed rapidly attaining a maximum of 400 rpm., whereupon the electric motor of the machine acting to rotate the drum is deenergized to permit the rotary speed of the drum to drop to the previous value.
  • the drum is initially rotated at the same low speed of in the present example 55 rpm, the direction of rotation being reversed five times at 3 sec. intervals, followed by a short burst, with a uniform duration of 4 sec., of spin-drying rotation at maximum speeds of 600, 800 and 1000 rpm, respectively, whereupon the rotary speed is again reduced to the previous value.
  • phase G In the first part of the third step of the present treatment method, generally indicated as phase G and having a duration of 45 sec. in the present example, the drum is initially rotated at the low laundering speed of in the present example 55 rpm, with the direction of rotation being reversed at intervals of 12 and 4 sec. respectively, followed by its rotary speed being gradually and linearly increased to a value of in the present example 85 rpm, which is then maintained for the remainder of this phase for permitting a uniform distribution of the laundry over the inner walls of the drum to be established.
  • the second part of the third step is in the present case further sub-divided into seven consecutive phases designated by reference letters H, I, L, M, N, O, P, the first of these phases having a duration of 10 sec, while the duration of the remaining phases is 50 sec each.
  • the rotary speed of the drum is rapidly increased from the previously attained value of 85 rpm to a spin-drying speed of 650 rpm, which is held for a short instance, to be subsequently again rapidly increased to the higher spin-drying speed of 85o rpm, which is then again held for a short instance.
  • the rotary speed of the drum is rapidly increased from the previously attained value to a faster spin-drying speed of in the present example 900 rpm, which is then held constant for the remainder of this phase of the third step.
  • the rotary speed of the drum is rapidly increased from the previously attained value to a somewhat faster spin-drying speed of successively 1000, 1100, 1200, 1400 and 1500 rpm, the respective rotary speeds thus attained being maintained constant throughout the respective phases of this step.
  • the present treatment method finally provides the execution of a fourth and a fifth step indicated respectively with phases Q and R and having a duration each of 10 min in the present example.
  • the drum is rotated at a low speed of about 30 to 35 rpm in alternating directions, in the present example for 4 sec in one direction and for 12 sec in the opposite direction, while during the fifth step, the drum is still rotated at a low, albeit somewhat higher speed of 55 rpm, the direction of rotation being reversed at regular 10 sec intervals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP92118987A 1991-11-11 1992-11-05 Method for the treatment of laundry in a laundry washer/drier combination Expired - Lifetime EP0542137B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN910073 1991-11-11
ITPN910073A IT1256274B (it) 1991-11-11 1991-11-11 Procedimento di trattamento della biancheria per macchina lavatrice e asciugatrice di biancheria.

Publications (2)

Publication Number Publication Date
EP0542137A1 EP0542137A1 (en) 1993-05-19
EP0542137B1 true EP0542137B1 (en) 1995-08-02

Family

ID=11394594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92118987A Expired - Lifetime EP0542137B1 (en) 1991-11-11 1992-11-05 Method for the treatment of laundry in a laundry washer/drier combination

Country Status (3)

Country Link
EP (1) EP0542137B1 (it)
DE (1) DE69203829T2 (it)
IT (1) IT1256274B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101111635B (zh) * 2005-01-26 2010-09-29 Bsh博世和西门子家用器具有限公司 防水处理后纺织物脱水的方法
US9695537B2 (en) 2009-07-27 2017-07-04 Lg Electronics Inc. Control method of a laundry machine

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1285703B1 (it) * 1996-05-14 1998-06-18 Merloni Antonio Spa Procedimento di lavaggio anti-incollamento della biancheria al cestello, nelle macchine lavabiancheria
US5890247A (en) * 1997-12-22 1999-04-06 Maytag Corporation Automatic washing machine incorporating a suds detection and control system
KR100504481B1 (ko) * 2002-11-25 2005-08-03 엘지전자 주식회사 세탁기의 모터 감속 제어장치 및 그 방법
AU2004202639B2 (en) * 2003-06-20 2011-01-27 Lg Electronics Inc. Washing method in washing machine including semi-drying cycle and control apparatus therefor
EP1803846A1 (en) * 2005-12-30 2007-07-04 IAR-SILTAL S.p.A. Spin drying process for washing machines
US8713736B2 (en) 2008-08-01 2014-05-06 Lg Electronics Inc. Control method of a laundry machine
US9416478B2 (en) 2009-03-31 2016-08-16 Lg Electronics Inc. Washing machine and washing method
US8763184B2 (en) 2008-08-01 2014-07-01 Lg Electronics Inc. Control method of a laundry machine
US8966944B2 (en) 2008-08-01 2015-03-03 Lg Electronics Inc. Control method of a laundry machine
US8746015B2 (en) 2008-08-01 2014-06-10 Lg Electronics Inc. Laundry machine
ES2605027T3 (es) 2009-02-11 2017-03-10 Lg Electronics Inc Máquina de lavar
KR101731330B1 (ko) * 2009-11-02 2017-04-28 엘지전자 주식회사 세탁 방법 및 세탁기
US9822473B2 (en) 2009-07-27 2017-11-21 Lg Electronics Inc. Control method of a laundry machine
US9234307B2 (en) 2009-07-27 2016-01-12 Lg Electronics Inc. Control method of a laundry machine
US10533275B2 (en) 2009-07-27 2020-01-14 Lg Electronics Inc. Control method of a laundry machine
KR20110048345A (ko) * 2009-11-02 2011-05-11 엘지전자 주식회사 세탁 방법 및 세탁기
MX2011012606A (es) * 2009-08-11 2011-12-14 Lg Electronics Inc Metodo de control de una maquina de lavanderia.
US8776297B2 (en) 2009-10-13 2014-07-15 Lg Electronics Inc. Laundry treating apparatus and method
US9045853B2 (en) 2009-10-13 2015-06-02 Lg Electronics Inc. Laundry treating apparatus
WO2012020898A1 (en) * 2010-08-11 2012-02-16 Lg Electronics Inc. Control method of a laundry machine
EP2666904A1 (en) * 2012-05-22 2013-11-27 Electrolux Home Products Corporation N.V. Method of operating a machine for treating laundry and machine for treating laundry
DE102020108677A1 (de) * 2020-03-30 2021-09-30 Miele & Cie. Kg Verfahren und Steuereinheit zum Durchführen eines Schleuderprogramms für ein Reinigungsgerät und Reinigungsgerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2045514A1 (de) * 1970-09-08 1972-03-09 Siemens Elektrogeraete Gmbh Verfahren zum Schleudern von Wäsche in Trommelwaschmaschinen
DE2153858A1 (de) * 1971-10-28 1973-05-03 Siemens Ag Arbeitsverfahren zum gleichmaessigen verteilen von waesche ueber den innenumfang einer, um eine waagerechte achse umlaufenden wasch- und schleudertrommel einer automatisch arbeitenden waschmaschine sowie fluidisch arbeitendes programmsteuergeraet zur durchfuehrung des verfahrens
FR2501736A1 (fr) * 1981-03-10 1982-09-17 Thomson Brandt Machine a laver et a essorer le linge, a tambour
FR2546540B1 (fr) * 1983-05-27 1985-07-05 Thomson Brandt Lave-linge a essorage de courte duree apres le rincage
DE3838997A1 (de) * 1988-11-18 1990-05-23 Licentia Gmbh Verfahren und vorrichtung zur optimierung des schleuderdrehzahl-zeit-profils, insbesondere bei haushaltwaschmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101111635B (zh) * 2005-01-26 2010-09-29 Bsh博世和西门子家用器具有限公司 防水处理后纺织物脱水的方法
US9695537B2 (en) 2009-07-27 2017-07-04 Lg Electronics Inc. Control method of a laundry machine

Also Published As

Publication number Publication date
IT1256274B (it) 1995-11-29
ITPN910073A1 (it) 1993-05-11
EP0542137A1 (en) 1993-05-19
DE69203829D1 (de) 1995-09-07
ITPN910073A0 (it) 1991-11-11
DE69203829T2 (de) 1995-11-23

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