EP2792779B1 - Procédé pour laver du linge dans une machine de lavage par pulvérisation - Google Patents

Procédé pour laver du linge dans une machine de lavage par pulvérisation Download PDF

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Publication number
EP2792779B1
EP2792779B1 EP13164308.2A EP13164308A EP2792779B1 EP 2792779 B1 EP2792779 B1 EP 2792779B1 EP 13164308 A EP13164308 A EP 13164308A EP 2792779 B1 EP2792779 B1 EP 2792779B1
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EP
European Patent Office
Prior art keywords
heating device
water
laundry
drum
tub
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.)
Revoked
Application number
EP13164308.2A
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German (de)
English (en)
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EP2792779A1 (fr
Inventor
Sylvia Guzman
Claudio Civanelli
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 Corp
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Whirlpool Corp
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Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Priority to PL13164308T priority Critical patent/PL2792779T3/pl
Priority to EP13164308.2A priority patent/EP2792779B1/fr
Priority to US14/250,746 priority patent/US20140310885A1/en
Publication of EP2792779A1 publication Critical patent/EP2792779A1/fr
Application granted granted Critical
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Revoked 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
    • D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only

Definitions

  • the present invention relates to a method for washing laundry in a horizontal axis washing machine comprising a drum rotatably mounted in a tub, a recirculation pump for recirculating a washing liquid on the laundry and a heating device placed in the tub for heating washing liquid.
  • So called "jet” or “spray” washing machines are well known in which the washing liquor is sprayed onto the laundry while the drum is rotated at a predetermined tumbling speed or spinning speed.
  • the main advantage of such known washing method is an increase of washing efficiency due to the high detergent concentration and the overall reduction of water amount.
  • Document EP 1 961 854 A1 discusses the problem of having a predetermined heater safety water level, and solves it with the provision of a control unit that supplies the water in the water through the circulation unit to wet laundry after the supply of a predetermined amount of wash water, rotates the rotary drum at the minimum RPM at which the laundry may be spin-dried to squeeze out water from the laundry, and detects the water level of the squeezed water.
  • the control unit controls the motor, the heater, the water supply unit and the circulation unit such that, when the detected water level is below a predetermined heater safety water level, water is supplied through the water supply unit until the water level reaches the heater safety water level, and, when the detected water level reaches the predetermined heater safety water level, water is heated by activating the washing heater until the temperature of the water reaches a target temperature, and the heated water is resupplied into the rotary drum.
  • the present invention it is possible to increase water level in the tub so that heater can be switched on without safety problems (entire heater submerged). Water already warmed can be distributed efficiently by recirculating it directly onto the laundry. According to a preferred feature of the invention, an increase of water level up to 20 mm is obtained in the tub so that heater can be safely switched on.
  • One of the main feature of the invention is the application of a low speed spinning sufficiently high to generate a centrifugal force which forms and maintains at least partially an annular layer of clothes against the drum wall to free water from laundry and to increase water level in the wash tub.
  • a low speed spinning phase which can be defined also as a high speed tumbling phase
  • water recirculation is interrupted.
  • water heating in the tub is carried out preferably with a slow motion movement (tumbling).
  • Such water heating is preferably carried out for a predetermined period of time (and not on the basis of a temperature feedback). This predetermined time is set on the basis of the total energy which has to be transferred to the laundry (as it will be clear in the following detailed description).
  • Temperature in the sump of the tub is therefore not monitored (a part from its sensing for safety reasons).
  • the drum is rotated again at a low spinning speed during which water already warmed is recirculated directly to the laundry.
  • a spray washing machine having a tub 12, a rotating drum 14 inside the tub 12 and driven by a motor 16, an electric heater 18 in the lower portion of the tub 12, a recirculation conduit 20 provided with a circulation pump 22 and a spray nozzle 24 for spraying washing liquid onto the laundry L.
  • washing liquid we mean either water or a mixture of water plus detergents or the like.
  • the washing machine has other components, as the drain pump, possible water storage tank, detergent distributors, water level sensors etc. but these will not be described in the following since they are not specifically related to the invention.
  • the heater 18, the motor 16 and the pump 22 are electrically connected to a control unit 26 which drives all such components according to a predetermined sequence.
  • a general advantage of using a recirculation system as shown in figure 1 is an improvement of the cleaning performances, for instance when such performances are tested according to the "red wine stain" standard procedure. Such advantage in cleaning performances is mainly due to a higher concentration of detergent.
  • the slow spin phase S at a speed preferably comprised between 80 and 120 rpm, and more preferably around 100 rpm, is carried out after detergent is added in the tub 12.
  • the method according to the invention can be carried out by adding detergent at the end of the heating phase, or at any time during the heating phase.
  • the overall duration of the spinning phase S is preferably comprised between 10 and 50 s, more preferably between 20 and 40 s.
  • control unit 26 of the washing machine 10 is running an algorithm for assessing the heating time after the slow spin phase S.
  • the first step of such algorithm is the measure of ambient temperature T1 by means of a NTC temperature sensor 15 placed in the tub. Such measure is carried out before feeding any water in the tub. This temperature is also assumed to be the temperature of the laundry dry load L. If a washing cycle has been recently terminated , the control unit 26 will assume as ambient temperature the T1 of the previous washing cycle.
  • Figures 5-7 show a comparison of the traditional spray washing cycle (dotted lines) and a washing cycle according to the invention (solid lines), and in which the same target temperature of laundry is used.
  • the applicant has discovered that in above condition, i.e. if it is desired to reach the same temperature of the laundry at the end of the heating phase, a lower energy is needed in the method according to the invention.
  • the applicant has measured an energy saving of at least 0,06 kWh for each washing cycle (this is shown in figure 7 ).
  • a horizontal axis washing machine is loaded with a cotton load Ml (thermal capacity 1,26 kJ/kg°C, specific absorption 2 I/kg).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (15)

  1. Procédé de lavage de linge dans une machine à laver (10), de préférence une machine à laver à axe horizontal, comprenant un tambour (14) monté à rotation dans un bac (12), une pompe de recirculation (22) pour remettre en circulation un liquide de lavage sur le linge (L) et un dispositif de chauffage (18) pour chauffer le liquide de lavage, caractérisé en ce qu'il comprend les étapes consistant à augmenter la vitesse du tambour jusqu'à une faible vitesse d'essorage prédéterminée (S), tandis que la pompe de recirculation (22) est déconnectée de manière à augmenter le niveau d'eau (W) dans le bac (12), à s'assurer que le dispositif de chauffage (18) est complètement immergé et connecter ensuite le dispositif de chauffage (18).
  2. Procédé selon la revendication 1, dans lequel le dispositif de chauffage (18) est connecté pendant une période de temps prédéterminée.
  3. Procédé selon la revendication 2, dans lequel ladite période de temps prédéterminée est basée sur l'énergie réelle à transférer au linge (L).
  4. Procédé selon la revendication 3, dans lequel ladite période de temps est calculée selon la formule suivante : t = Ml * A + Mwl * Cw * Tt - T ⁢ 2 + ( Ml * Cl * Tt - T ⁢ 1 + Tt - T ⁢ 1 * k V 2 * R
    Figure imgb0015
    où :
    MI = masse de linge dans le bac ;
    A = absorption spécifique du linge ;
    Mwl = masse d'eau libre ;
    Cw = capacité thermique de l'eau ;
    Tt = température cible de la charge + eau ;
    T2 = température de l'eau chargée dans le bac ;
    Cl = capacité thermique de la charge ;
    T1 = température ambiante ;
    K = coefficient expérimental pour tenir compte de la perte de chaleur ;
    R = résistance du dispositif de chauffage dans le bac ;
    V = tension du courant électrique utilisé par le dispositif de chauffage.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel ladite faible vitesse d'essorage est comprise entre 80 et 120 tr/min.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel la faible vitesse d'essorage (S) est maintenue pendant un temps global compris entre 10 et 50 s.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel, au cours de la phase dans laquelle le dispositif de chauffage (18) est connecté, le tambour (14) est mis en rotation au moins par intermittence à une vitesse de culbutage (G).
  8. Procédé selon la revendication 6, dans lequel la vitesse de culbutage (G) est comprise entre 10 et 70 tr/min.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel, une fois que le dispositif de chauffage (18) est déconnecté, le tambour (14) est entraîné en rotation à une seconde faible vitesse d'essorage (B) pendant une période de temps prédéterminée.
  10. Procédé selon la revendication 8, dans lequel la seconde faible vitesse d'essorage (B) est sensiblement identique à la première vitesse d'essorage (S).
  11. Machine à laver (10), de préférence machine à laver à axe horizontal, comprenant un tambour (14) monté à rotation dans un bac (12), une pompe de recirculation (22) pour remettre en circulation un liquide de lavage sur le linge (L), un moteur (16) pour faire tourner le tambour (14) et un dispositif de chauffage (18) pour chauffer le liquide de lavage, caractérisée en ce qu'elle comprend une unité de commande (26) qui est à même d'entraîner le moteur (16) pour augmenter la vitesse du tambour jusqu'à une faible vitesse d'essorage prédéterminée (S), tandis que la pompe de recirculation (22) est déconnectée de manière à augmenter le niveau d'eau (W) dans le bac (12), s'assurer que le dispositif de chauffage (18) est complètement immergé et connecter ensuite le dispositif de chauffage (18).
  12. Machine à laver selon la revendication 11, dans laquelle l'unité de commande (26) est à même d'entraîner le dispositif de chauffage (18) pendant une période de temps prédéterminée.
  13. Machine à laver selon la revendication 12, dans laquelle ladite période de temps prédéterminée est calculée par l'unité de commande (26) sur la base du transfert ou non de l'énergie réelle au linge (L).
  14. Machine à laver selon la revendication 11, dans laquelle l'unité de commande (26) est à même d'entraîner le tambour (14) au moins par intermittence à une vitesse de culbutage (G), tandis que ledit dispositif de chauffage (18) est connecté.
  15. Machine à laver selon la revendication 11, dans laquelle l'unité de commande (26) est à même d'entraîner le moteur (16) une fois que le dispositif de chauffage (18) est déconnecté de sorte que le tambour (14) tourne à une seconde faible vitesse d'essorage (B) pendant une période de temps prédéterminée.
EP13164308.2A 2013-04-18 2013-04-18 Procédé pour laver du linge dans une machine de lavage par pulvérisation Revoked EP2792779B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL13164308T PL2792779T3 (pl) 2013-04-18 2013-04-18 Sposób prania w pralce natryskowej
EP13164308.2A EP2792779B1 (fr) 2013-04-18 2013-04-18 Procédé pour laver du linge dans une machine de lavage par pulvérisation
US14/250,746 US20140310885A1 (en) 2013-04-18 2014-04-11 Method for washing laundry in a spray washing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13164308.2A EP2792779B1 (fr) 2013-04-18 2013-04-18 Procédé pour laver du linge dans une machine de lavage par pulvérisation

Publications (2)

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EP2792779A1 EP2792779A1 (fr) 2014-10-22
EP2792779B1 true EP2792779B1 (fr) 2015-09-30

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EP13164308.2A Revoked EP2792779B1 (fr) 2013-04-18 2013-04-18 Procédé pour laver du linge dans une machine de lavage par pulvérisation

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EP (1) EP2792779B1 (fr)
PL (1) PL2792779T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211412A1 (fr) * 2016-06-08 2017-12-14 Arcelik Anonim Sirketi Lave-linge à efficacité de nettoyage améliorée et à rendement énergétique amélioré
DE102019209149A1 (de) * 2019-06-25 2020-12-31 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Pumpvorrichtung und ein Verfahren zum Betreiben des Wäschepflegegeräts
KR20210004339A (ko) * 2019-07-04 2021-01-13 엘지전자 주식회사 세탁기의 제어방법

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159204A1 (fr) 1984-02-17 1985-10-23 Esswein S.A. Lave-linge dont la cuve contient de l'eau à une faible hauteur au-dessus du fond du tambour
EP0182364A2 (fr) 1984-11-20 1986-05-28 INDUSTRIE ZANUSSI S.p.A. Machine à laver le linge
US20070283510A1 (en) 2006-06-09 2007-12-13 Hoi Jin Jeong Washing machine and operating method thereof
EP1961854A1 (fr) 2007-02-26 2008-08-27 Samsung Electronics Co., Ltd. Machine à laver et son procédé de commande de lavage
EP2161365A2 (fr) 2008-09-09 2010-03-10 MIELE & CIE. KG Procédé de fonctionnement d'un lave-linge et lave-linge
EP2246469A1 (fr) 2010-02-16 2010-11-03 V-Zug AG Lave-linge doté d'une pompe à circulation et d'une phase d'essorage
US20120151689A1 (en) 2009-08-27 2012-06-21 Sang Il Hwang Control method of laundry machine
WO2013118999A1 (fr) 2012-02-07 2013-08-15 Lg Electronics Inc. Procédé de commande d'un dispositif lave-linge

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100565251B1 (ko) * 2004-07-19 2006-03-30 엘지전자 주식회사 드럼세탁기의 절수세탁방법
US20070118997A1 (en) * 2005-08-23 2007-05-31 Choi Du H Washing machine
KR20090035898A (ko) * 2007-10-08 2009-04-13 엘지전자 주식회사 세탁장치의 세탁방법
US8713736B2 (en) * 2008-08-01 2014-05-06 Lg Electronics Inc. Control method of a laundry machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159204A1 (fr) 1984-02-17 1985-10-23 Esswein S.A. Lave-linge dont la cuve contient de l'eau à une faible hauteur au-dessus du fond du tambour
EP0182364A2 (fr) 1984-11-20 1986-05-28 INDUSTRIE ZANUSSI S.p.A. Machine à laver le linge
US20070283510A1 (en) 2006-06-09 2007-12-13 Hoi Jin Jeong Washing machine and operating method thereof
EP1961854A1 (fr) 2007-02-26 2008-08-27 Samsung Electronics Co., Ltd. Machine à laver et son procédé de commande de lavage
EP2161365A2 (fr) 2008-09-09 2010-03-10 MIELE & CIE. KG Procédé de fonctionnement d'un lave-linge et lave-linge
US20120151689A1 (en) 2009-08-27 2012-06-21 Sang Il Hwang Control method of laundry machine
EP2246469A1 (fr) 2010-02-16 2010-11-03 V-Zug AG Lave-linge doté d'une pompe à circulation et d'une phase d'essorage
WO2013118999A1 (fr) 2012-02-07 2013-08-15 Lg Electronics Inc. Procédé de commande d'un dispositif lave-linge

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PL2792779T3 (pl) 2015-12-31
US20140310885A1 (en) 2014-10-23
EP2792779A1 (fr) 2014-10-22

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