EP2746442B1 - Procédé de commande d'une machine à laver pour l'élimination des odeurs - Google Patents

Procédé de commande d'une machine à laver pour l'élimination des odeurs Download PDF

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Publication number
EP2746442B1
EP2746442B1 EP13197656.5A EP13197656A EP2746442B1 EP 2746442 B1 EP2746442 B1 EP 2746442B1 EP 13197656 A EP13197656 A EP 13197656A EP 2746442 B1 EP2746442 B1 EP 2746442B1
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EP
European Patent Office
Prior art keywords
speed
drum
value
temperature
water
Prior art date
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Application number
EP13197656.5A
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German (de)
English (en)
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EP2746442A1 (fr
Inventor
Danilo Cascia
Giuliana Latini
Mauro MANCINI
Gioia Rossetti
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 EP2746442A1 publication Critical patent/EP2746442A1/fr
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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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only

Definitions

  • the present invention relates to a method for controlling a washing machine.
  • the washing machines have the purpose to clean the fabrics and remove any stains on the same.
  • This aim is typically obtained through suitable washing cycles, selected according to the type of clothes to be washed.
  • Document EP2423368 discloses a washing machine including: a housing, a tub elastically supported in the housing, a drum rotatably provided in the tub, a motor for driving the drum to rotate and a control device for controlling the driving of the motor.
  • the control section controls: a first agitation washing step of rotating the drum at a low speed so that the laundry can tumble in the drum, a high-speed rotation step of rotating the drum at a high speed so that the laundry clings to the inner periphery of the drum and a second agitation washing step of rotating the drum at a low speed so that the laundry can tumble in the drum.
  • the Applicant has therefore known that by means of a new washing program, studied in a focused manner to the elimination of bad smells, the results obtained from washing machines could be significantly improved.
  • Aim of the present invention is to provide a method for controlling a washing machine that is capable not only to eliminate the stains, but which also allows to eliminate the bad smells that sometimes remain in the fabrics.
  • the object of the present invention is a method for controlling a washing machine, including the execution of a washing step in which the rotation speed of the drum of said machine is subject to a plurality of increases alternated with respective decreases, each increase and each decrease being performed by keeping or bringing the temperature of the wash water contained in said drum at/to certain values.
  • step d the following operations are performed:
  • said first speed is comprised between 25 rpm and 45 rpm.
  • said second speed is comprised between 50 rpm and 70 rpm.
  • said first temperature value is comprised between 35 °C and 45 °C.
  • said second temperature value is comprised between 40 °C and 50 °C.
  • said third temperature value is comprised between 50 °C and 70 °C.
  • a topping up of water in said drum is carried out, preferably with a amount of water comprised between 5 liters and 10 liters.
  • a plurality of rinse steps is carried up, preferably three rinse steps, in particular after said topping up step.
  • the method according to the invention has the main purpose to eliminate the bad smells that can remain in the fabrics.
  • the method includes the execution of a washing step provides, that is a step in which the clothes are subject in a substantially simultaneous manner to a mechanical, chemical and thermal action.
  • the mechanical action is mainly due to the rotation of the drum in which the clothes are located. The more the rotation speed is high, the greater is the mechanical action to which the fabrics are subject.
  • the chemical action is due to the use of cleaning substances, such as, for example, the detergents, which attack chemically the substances deposited on the fabrics and, reacting with the same, facilitate their detachment.
  • cleaning substances such as, for example, the detergents
  • the thermal action is performed by the wash water, which is suitably heated, as provided in each washing cycle.
  • the washing step according to the invention provides that the rotation speed of the drum is subject to a plurality of increases alternated with respective decreases; advantageously each increase and each decrease are performed by keeping or by bringing the temperature of the wash water contained in said drum at/to determined values.
  • washing step involves the execution of the following operations:
  • the fabrics are subjected to an alternating mechanical action, in which the drum is rotated in an alternating manner between a speed equal to, for example, 40 rpm, and a second speed equal to, for example, 60 rpm.
  • the controlled and alternating water heating causes a relaxation of the fibers of which the clothes are composed and contributes to make the water associated with the clothes themselves is released, bringing with itself the substances that cause bad smells.
  • the values of the water temperature in the various iterations of the method are increasing over time.
  • a topping up of water in the drum is carried out.
  • the amount of water used in this topping up step can be preferably comprised between 5 and 10 liters, for example, equal to 7 liters.
  • the topping up step has the purpose to bring in a condition of substantial suspension the unwanted substances extracted from the fabrics, so as to facilitate the elimination during the subsequent rinse steps.
  • the method can be completed with a plurality of rinse steps, for example three rinse steps. These steps are preferably carried out after said topping up step, and before the final spin step.
  • Figure 1 shows by way of example representative graphs of the implementation of the method according to the invention.
  • the x-axis represents the time
  • on the y-axis are represented the water consumption of the machine (A), the electric power absorbed by the machine (B), the temperature of the wash water (C) and the drum speed rotation (D).
  • the time interval T1 ends when the water temperature reaches a determined value, corresponding to said first value, in this case about 30 °C.
  • the speed of rotation drum is kept low, for example at 40 rpm (the first rotation speed).
  • the time interval T3 therefore ends when the water reaches a temperature of about 40 °C.
  • the physical quantities have variations fully similar to that at the time interval T2: the power absorption is low, the temperature decreases and the speed of rotation drum is high (60 rpm), that is equal to the second rotation speed.
  • the intervals T5, T6 propose again qualitative trends similar to the ones of the intervals T1, T3 and T2, T4, respectively: the water temperature increases to 60 °C, with high power absorption and low rotation speed, and then the temperature and the power absorption decrease, while the speed of rotation drum becomes again high.
  • the segment marked A1 represents the topping up step, while the segments A2-A4 represent the three rinse steps carried out after the topping up step.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (9)

  1. Procédé de commande d'une machine à laver, comprenant la réalisation d'une étape de lavage dans laquelle la vitesse de rotation du tambour de ladite machine est soumise à une pluralité d'accélérations et de décélérations respectivement alternées, chaque accélération et chaque décélération étant exécutée en maintenant ou en amenant la température de l'eau de lavage contenue dans ledit tambour à/jusqu'à des valeurs déterminées, caractérisé en ce que ladite étape de lavage comprend les opérations suivantes :
    a) la température de l'eau de lavage est accrue jusqu'à une première valeur alors que le tambour tourne à une première vitesse ;
    b) lorsque ladite température atteint ladite première valeur, le chauffage de l'eau de lavage est arrêté et le tambour tourne à une seconde vitesse de rotation plus élevée que ladite première vitesse ;
    c) lorsque la température de l'eau diminue pour atteindre une première valeur de seuil ou après un laps de temps prédéterminé, la température de l'eau est de nouveau remontée jusqu'à une deuxième valeur, de préférence plus élevée que ladite première valeur, tandis que le tambour tourne à une vitesse inférieure à ladite seconde vitesse et, de préférence, essentiellement égale à ladite première vitesse ;
    d) lorsque ladite température atteint ladite deuxième valeur, le chauffage de l'eau de lavage est arrêté et le tambour se déplace à une vitesse de rotation supérieure à ladite première vitesse et, de préférence, essentiellement égale à ladite seconde vitesse.
  2. Procédé selon la revendication 1, caractérisé en ce que, après l'étape d) :
    e) lorsque la température de l'eau diminue jusqu'à une deuxième valeur de seuil ou après un laps de temps prédéterminé, la température de l'eau est augmentée jusqu'à une troisième valeur, de préférence plus élevée que ladite deuxième valeur, tandis que le tambour tourne à une vitesse inférieure à ladite seconde vitesse et, de préférence, essentiellement égale à ladite première vitesse ;
    f) lorsque ladite température atteint ladite troisième valeur, le chauffage de l'eau de lavage est arrêté et le tambour se déplace à une vitesse de rotation supérieure à ladite première vitesse et, de préférence, essentiellement égale à ladite seconde vitesse.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite première vitesse est comprise entre 25 tours par minute et 45 tours par minute.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite seconde vitesse est comprise entre 50 tours par minute et 70 tours par minute.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite première valeur de température est comprise entre 35°C et 45°C.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite deuxième valeur de température est comprise entre 40°C et 50°C.
  7. Procédé selon la revendication 2 ou selon l'une quelconque des revendications 3 à 6 lorsqu'elles sont dépendantes de la revendication 2, caractérisé en ce que ladite troisième valeur de température est comprise entre 50°C et 70°C.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que une fois que ladite étape de lavage est terminée et avant une ou plusieurs étape(s) d'essorage, une remise en eau dudit tambour est réalisée, de préférence, avec une quantité d'eau comprise entre 5 litres et 10 litres.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que une pluralité d'étapes de rinçage est réalisée, de préférence, trois étapes de rinçage, en particulier après ladite étape de remise en eau.
EP13197656.5A 2012-12-21 2013-12-17 Procédé de commande d'une machine à laver pour l'élimination des odeurs Active EP2746442B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001137A ITTO20121137A1 (it) 2012-12-21 2012-12-21 Metodo di controllo di una macchina lavabiancheria per l¿eliminazione di cattivi odori

Publications (2)

Publication Number Publication Date
EP2746442A1 EP2746442A1 (fr) 2014-06-25
EP2746442B1 true EP2746442B1 (fr) 2015-10-28

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Application Number Title Priority Date Filing Date
EP13197656.5A Active EP2746442B1 (fr) 2012-12-21 2013-12-17 Procédé de commande d'une machine à laver pour l'élimination des odeurs

Country Status (2)

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EP (1) EP2746442B1 (fr)
IT (1) ITTO20121137A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102587227B1 (ko) * 2016-05-30 2023-10-11 엘지전자 주식회사 세탁기의 제어 방법
EP3339490B1 (fr) 2016-12-22 2022-12-28 Whirlpool EMEA S.p.A. Procédé de traitement d'articles textiles dans une machine à laver et machine à laver mettant en uvre le procédé

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3651595B2 (ja) * 2001-12-13 2005-05-25 株式会社東芝 洗濯機のインバータ装置及び洗濯乾燥機のインバータ装置
DE10326551A1 (de) * 2003-06-12 2005-01-05 BSH Bosch und Siemens Hausgeräte GmbH Wasch- und Spülverfahren für eine Waschmaschine
JP4711914B2 (ja) * 2006-08-31 2011-06-29 日立アプライアンス株式会社 ドラム式洗濯機
EP2169102B1 (fr) * 2007-09-04 2014-12-31 Panasonic Corporation Machine a laver, procede et programme pour commander la vitesse de rotation du tambour
JP4325736B1 (ja) * 2008-04-28 2009-09-02 パナソニック株式会社 ドラム式洗濯機
JP2012040083A (ja) * 2010-08-17 2012-03-01 Panasonic Corp ドラム式洗濯機
EP2423368B1 (fr) * 2010-08-17 2016-08-24 Panasonic Corporation Machine à laver de type tambour

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EP2746442A1 (fr) 2014-06-25
ITTO20121137A1 (it) 2014-06-22

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