EP1803846A1 - Procédé d' essorage pour machines à laver - Google Patents

Procédé d' essorage pour machines à laver Download PDF

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Publication number
EP1803846A1
EP1803846A1 EP05113093A EP05113093A EP1803846A1 EP 1803846 A1 EP1803846 A1 EP 1803846A1 EP 05113093 A EP05113093 A EP 05113093A EP 05113093 A EP05113093 A EP 05113093A EP 1803846 A1 EP1803846 A1 EP 1803846A1
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EP
European Patent Office
Prior art keywords
approximately
speed
drum
rpm
rotation
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.)
Withdrawn
Application number
EP05113093A
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German (de)
English (en)
Inventor
Giuseppe Marchitto
Alberto Vassalli
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.)
IAR-SILTAL SpA
Original Assignee
IAR-SILTAL 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 IAR-SILTAL SpA filed Critical IAR-SILTAL SpA
Priority to EP05113093A priority Critical patent/EP1803846A1/fr
Publication of EP1803846A1 publication Critical patent/EP1803846A1/fr
Withdrawn legal-status Critical Current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
    • 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 present invention relates to a spin drying process for laundry washing machines.
  • the present invention relates to a spin drying process applied to laundry washing machines equipped with a control system of the electronic type, preferably for household use.
  • laundry washing machines provide for the possibility of setting different alternative washing cycles depending on the type of laundry to be washed.
  • the chief variables considered in this connection relate to duration of cycle, temperature of water, and quantity of detergent used, which is for example reduced in the case of cycles without pre-wash and/or limited to short rinses.
  • the different programmed cycles provide for a spin phase, in which the rotating drum in which the laundry is placed is made to rotate at high speed so as to eliminate as much of the water as possible and make it possible to hang out the laundry without its dripping.
  • the spin phases in particular the final one that takes place at the end of the washing cycle, is traditionally set to rotate at incremental steps at increasing speeds, which may reach as much as 1800 revs per minute.
  • the laundry itself due to the high speed of rotation, is also subjected to considerable stress which reduces its duration over time.
  • the laundry also tends to "stick" to itself and to the inner walls of the drum, with the consequence that it is more difficult for the water to be eliminated from those parts that are less exposed, and therefore the wringing process is not uniform.
  • the present invention proposes to solve one or more of the above drawbacks.
  • one purpose of the present invention is to provide a spin drying process for laundry washing machines that enables optimal results to be achieved in terms of wringing the laundry, without producing high levels of stress on the mechanical components.
  • Another purpose of the invention is to provide a drying process as defined above that can avoid high stress on the entire structure of the washing machine, also avoiding the consequent vibration and noise.
  • Another purpose of the invention is to provide a spin drying process that avoids subjecting the laundry to wringing stress which would limit its duration over time.
  • Another purpose of the invention is to provide a spin drying process such that it can be easily and economically be implemented.
  • spin drying process for laundry washing machines which comprises a plurality of impulses or steps at increasing speed of the drum containing the laundry, alternated by brief pauses during which the speed tends to zero, or steps during which the rotation of the drum is drastically reduced.
  • the spin drying process according to the present intervention comprises a plurality of phases of rotation of the drum according to impulses or steps at increasing maximum speed, or impulse ramps, alternated by brief pauses during which the speed tends to zero, or steps during which the rotation of the drum is drastically reduced.
  • the maximum speed of the drum in the various phases of the process is approximately between 500 and 1400 revs per minute (rpm).
  • the maximum speed in absolute terms is preferably in the order of 1200 rpm and is reached repeatedly in the second part of the process, or starting from approximately the middle of the spin cycle and until its termination.
  • the minimum speed of rotation is preferably constant, for example between 90 and 100 rpm.
  • the spin impulses or steps at minimum speed configure brief periods during which the speed tends to zero, which occur after each phase of impulses or steps at high speed.
  • Two or more phases at which the maximum speed of rotation of the drum varies in a range between 600 and 850 rpm are programmed in the first part of the spin cycle; preferentially, there are four such phases, the first two at approximate speed of 650 rpm, and the remaining two, subsequent, phases at a speed of approximately 800 rpm.
  • the maximum speeds reached by the drum increase progressively, in the sense that the first impulses produce a rotation of approximately 650 rpm, whereas the last impulses, which are five in number in the example, produce a rotation of approximately 1200 rpm. Between these two groups of impulses there are intermediate and consecutive phases with rotation of approximately 800 rpm.
  • the table in figure 1 also shows the time spans of the various high-speed impulses or steps, that vary from a minimum of a few seconds to a maximum of some minutes and increase progressively; the steps during which the speed tends to zero are, on the contrary, preferably of substantially constant duration.
  • the longest periods of time are those of the phases of rotation at maximum speed during the second part of the process, which vary from two to four minutes (with maximum in the last phase).
  • the shortest periods of time are those concerning the high speed rotation impulses in the first part of the process, that is those at speeds of approximately 650 rpm and 800 rpm, whose duration is roughly between 3 and 15 seconds respectively.
  • the reduced-speed rotation impulses or steps, roughly at about 95 rpm, are of substantially constant duration of approximately one minute.
  • an impulse or step is programmed that brings the drum to a speed of a few revs per minute for a short period of time, which comprises a preliminary phase to rearrange the laundry in the drum uniformly.
  • the speed during this preliminary step is roughly between 40 and 60 rpm, preferably about 55 rpm.
  • This preliminary phase is followed by a phase of drainage and distribution.
  • the overall duration of the spin cycle, according to the preferred embodiment of the process, described above, is between 20 and 25 minutes.
  • Experimental tests carried out by the applicant have shown that, on putting the laundry through the process according to the present invention, residual dampness of the laundry is not above 45%.
  • the various phases of the cycle that activate impulses to rotate at different speeds and the respective times are managed through a microprocessor or electronic card.
  • the spin drying process according to the present invention unlike known solutions in which the spin drying system is of the gradual ramp type and with long periods at which the maximum speed is maintained, utilises a method with impulse ramps, which makes it possible to achieve effective and uniform wringing of the laundry without the need for prolonged periods of rotation of the drum at high speeds. Consequently the process avoids wear and tear on the mechanical components of the washing machine and substantially reduces the stress to which the laundry itself is subjected.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP05113093A 2005-12-30 2005-12-30 Procédé d' essorage pour machines à laver Withdrawn EP1803846A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05113093A EP1803846A1 (fr) 2005-12-30 2005-12-30 Procédé d' essorage pour machines à laver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05113093A EP1803846A1 (fr) 2005-12-30 2005-12-30 Procédé d' essorage pour machines à laver

Publications (1)

Publication Number Publication Date
EP1803846A1 true EP1803846A1 (fr) 2007-07-04

Family

ID=36314052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05113093A Withdrawn EP1803846A1 (fr) 2005-12-30 2005-12-30 Procédé d' essorage pour machines à laver

Country Status (1)

Country Link
EP (1) EP1803846A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295623A1 (fr) * 2009-09-10 2011-03-16 Samsung Electronics Co., Ltd. Machine à laver et son procédé de commande
KR101073500B1 (ko) * 2004-06-02 2011-10-17 삼성전자주식회사 드럼 세탁기

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546540A1 (fr) * 1983-05-27 1984-11-30 Thomson Brandt Lave-linge a essorage de courte duree apres le rincage
EP0542137A1 (fr) * 1991-11-11 1993-05-19 Zanussi Elettrodomestici S.p.A. Procédé de traitement du linge dans une machine à laver et à sécher
US5596889A (en) 1995-10-20 1997-01-28 Electric Power Research Institute Laundry machine with reduced suds spin cycle
EP1281803A1 (fr) * 2001-07-31 2003-02-05 Samsung Electronics Co., Ltd. Machine à laver
US20050044640A1 (en) * 2003-08-26 2005-03-03 Hyeong Do Ki Washer and method of performing spinning operation
EP1526210A2 (fr) * 2003-10-21 2005-04-27 Lg Electronics Inc. Machine à laver et procédé pour commander une telle machine à laver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546540A1 (fr) * 1983-05-27 1984-11-30 Thomson Brandt Lave-linge a essorage de courte duree apres le rincage
EP0542137A1 (fr) * 1991-11-11 1993-05-19 Zanussi Elettrodomestici S.p.A. Procédé de traitement du linge dans une machine à laver et à sécher
US5596889A (en) 1995-10-20 1997-01-28 Electric Power Research Institute Laundry machine with reduced suds spin cycle
EP1281803A1 (fr) * 2001-07-31 2003-02-05 Samsung Electronics Co., Ltd. Machine à laver
US20050044640A1 (en) * 2003-08-26 2005-03-03 Hyeong Do Ki Washer and method of performing spinning operation
EP1526210A2 (fr) * 2003-10-21 2005-04-27 Lg Electronics Inc. Machine à laver et procédé pour commander une telle machine à laver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101073500B1 (ko) * 2004-06-02 2011-10-17 삼성전자주식회사 드럼 세탁기
EP2295623A1 (fr) * 2009-09-10 2011-03-16 Samsung Electronics Co., Ltd. Machine à laver et son procédé de commande

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