EP2792782A1 - Procédé de fonctionnement d'un lave-linge avec dispositif de recirculation et lave-linge - Google Patents

Procédé de fonctionnement d'un lave-linge avec dispositif de recirculation et lave-linge Download PDF

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Publication number
EP2792782A1
EP2792782A1 EP20140164760 EP14164760A EP2792782A1 EP 2792782 A1 EP2792782 A1 EP 2792782A1 EP 20140164760 EP20140164760 EP 20140164760 EP 14164760 A EP14164760 A EP 14164760A EP 2792782 A1 EP2792782 A1 EP 2792782A1
Authority
EP
European Patent Office
Prior art keywords
washing
tub
drum
holding
circulating
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Withdrawn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
EP20140164760
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German (de)
English (en)
Inventor
Dirk Sieding
Marcel Zielke
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP2792782A1 publication Critical patent/EP2792782A1/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
    • 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 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
    • 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
    • D06F34/14—Arrangements for detecting or measuring specific parameters

Definitions

  • the invention relates to a method for operating a washing machine with Umflut Road and a washing machine.
  • washing machines have a tub, which is filled with washing liquid and in which a drum is rotatably mounted.
  • the washing liquid may contain water, detergent and optionally further washing additives.
  • To clean soiled laundry it is filled into the drum and rolled by means of rotational movements of the drum in the washing liquid.
  • a more modern washing machine has a circulating device. This removes a portion of the washing liquid from a first tub area of the tub and reintroduces it in a second tub area of the tub to flooded the laundry.
  • Umflut the Umflut
  • the Umflut is during a whole washing step in continuous operation.
  • the invention has for its object to increase the washing effect of a washing machine with Umflut driven.
  • the invention is based on the recognition that a constant operation of the flooding device does not lead to an optimal washing performance.
  • washing performance or washing action is meant here the degree of cleanliness which reaches the loading amount of laundry with a certain degree of soiling after a washing step.
  • the flooding phase duration is the period during the washing step in which flooding of the laundry takes place by means of the flooding device. Accordingly, the holding phase duration reflects the period during the washing step in which there is a much lower flooding or substantially no flooding.
  • the soak-hold quotient The relationship between the flooding phase duration and the sustain phase duration is referred to herein as the soak-hold quotient.
  • the flooding phases are in the washing step the same length, as well as the holding phases are the same length.
  • the ripple-and-hold quotient can also be calculated as the quotient between the duration of a rerouting phase and the duration of a subsequent holding phase.
  • the hold-flop quotient is the quotient of the sum of all the float-phase durations and the sum of all hold-phase durations in the wash step.
  • the drum has a scooping system, for example in the form of drivers and / or grooves, which run on its inside parallel to the axis of rotation, and / or in the form of holes in the drum wall.
  • the scooping system By the scooping system, the free liquor, that is, not absorbed by the laundry part of the washing liquid is fluidized and moved from outside to inside, so from the circumference of the drum in the direction of the axis of rotation. Seen in this way, the circulating device moves the free liquor from the inside to the outside, ie from the axis of rotation of the drum to its circumference.
  • the Umflut namely the free liquor is removed from a lower tub area, so that the liquid level drops in the tub, and is placed elsewhere in an upper tub area again from the outside into the drum.
  • the drum performs a rotational movement substantially during the entire duration of the washing step, wherein the direction of rotation can change here.
  • a washing step may in particular be a pre-wash or a main wash.
  • the washing step may also be a rinsing phase.
  • the washing step has alternately several Umflutphasen and holding phases, depending on the duration of the washing step more than 2, 3, 4 or 5 Umflutphasen and about as many holding phases.
  • In the holding phase is flooded with much less washing liquid, ie free liquor.
  • the flooding in the holding phase is completely adjusted so that the entire free liquor is available for the scooping process by means of the scooping system of the drum.
  • the circulating device has a circulating pump which, during the circulating phase, pumps the part of the washing liquid out of the first tub area through a circulating line into the second tub area, the circulating pump being throttled or substantially stopped during the holding phase.
  • the circulating pump By throttling the circulating pump ensures that only a small portion of the washing liquid is sent from the tub through the Umflutön. Even with a very low flooding is spoken in the present case of a holding phase. This is useful, for example, if the circulating pump can not be completely switched off due to the technical conditions, or if a constant switching on / off of the circulating pump is harmful.
  • the circulating-holding quotient comprises a circulating-phase duration of the circulating phase and a holding-phase duration of the holding phase during the washing step in a range between 0.1 and 0.9, between 0.2 and 0, 9, between 0.3 and 0.8 or between 0.3 and 0.7.
  • a purge-hold quotient of 0.3 means that the purge device is active or fully active 30% of the time during the wash step, while it is essentially inactive or shut down to a much lower level during the remaining 70% of the time.
  • the above-described optimum relationship between a Umflutphasen duration and a holding phase duration depends on various design factors and operating parameters, for example on the washing machine size, in particular the drum volume of the drum and the size of the tub, the load, ie the weight of in the drum introduced laundry, from the free liquor, that is, the volume of the washing liquid not absorbed by the laundry and the like. It is therefore advantageous if the circulating-holding quotient for controlling the circulating device is set as a function of one or more of the abovementioned and, if appropriate, as a function of further factors and parameters before or during the washing step.
  • the circulating-holding quotient is set as a function of a selected washing program.
  • the choice of the washing program is preferably carried out by the user of the washing machine, for example, based on the type and / or degree of contamination of the laundry.
  • a loading weight is determined as the weight of the laundry located in the drum and the circulating-holding quotient is set as a function of the determined loading weight.
  • a corresponding sensor can be arranged in the washing machine, which detects the loading weight and sends it to a controller.
  • the soak-hold quotient is set lower at a higher load weight than at a lower load weight. For example, there may be a linear dependency between the flood hold ratio and the load weight.
  • a volume of the free liquor in the tub is determined and the circulating-holding quotient is set as a function of the volume of the free liquor.
  • the volume of the free liquor depends on how much washing liquid is introduced into the tub and how much of it is absorbed by the laundry. This volume can therefore be determined as an estimate.
  • a liquid level sensor can be arranged in a lower region of the tub, which measures the liquid level in the tub and determines therefrom the volume of the free liquor or a corresponding parameter.
  • the circulating-holding quotient is set lower with a higher volume of the free liquor, than with a lower loading weight.
  • the dependence of the soak-hold quotient on the load weight and / or the volume of the free liquor may be stored in the controller in the form of a table or mathematical formula that is accessed before or during the wash step.
  • the Umflutphasen duration of a single Umflutphase and / or the holding phase duration of a single holding phase in a range between 30 seconds to 10 minutes, or lie between one and 5 minutes /.
  • the drum is operated at a constant speed during the entire washing step.
  • the drum is operated during the Umflutphase with a lower or higher speed than during the holding phase.
  • a higher speed of the drum has the effect of forming a so-called wash tunnel in the drum. If the drum is turned faster during the circulation phase, this will result in better washing of the laundry from the inside to the outside.
  • the drum may be at a speed of between about 20 and 70 revolutions per minute (RPM), preferably be operated between about 35 to 60 U / min and during the Umflutphase at a speed of between about 50 and 100 U / min, preferably from about 80 U / min.
  • RPM revolutions per minute
  • the speed of the drum during the duration of the holding phase can be ramped increased, for example, from 35 to 60 U / min.
  • the drum is loaded before the washing step with a maximum loading weight of between 5 to 10 kg or between 7 and 9 kg.
  • the washing machines which are controlled by a corresponding control unit so that the present method for treating the laundry is performed, preferably have a drum with a drum volume between 30 and 100 liters, between 40 and 80 liters or between 50 and 75 liters.
  • the ranges of values listed above for the circulating-holding quotient are optimal in particular for such average drum volumes and / or loading weights.
  • a washing machine 1 is shown schematically in cross section.
  • This has a tub 2, in which a drum 3 is rotatably mounted.
  • the laundry 5 to be treated is placed in the drum 3 by a user before selecting a washing program.
  • the washing machine 1 further comprises a drain pump 6, with the washing liquid can be pumped out of the tub 2, and a Umflut driving 4 from a Umflutpumpe 41, a Umflut réelle 42 and a Umflutdüse 43.
  • the bypass nozzle 43 may be a simple opening in the bypass line 42.
  • the drum 3 is rotated at a certain speed to move the laundry 5 in the washing liquid in the tub 2.
  • the circulating pump 41 is turned on during the entire washing step to flood the laundry with the washing liquid. It has been assumed that this achieves an optimum washing effect. However, it has been found that by means of an intermittent flooding, so with changing on / off the Umflutpumpe 41, in most cases better washing effects can be achieved. This is indicated by the diagram in the Fig. 2 illustrated. On the x-axis a circulation-hold quotient is plotted.
  • the value zero at the left edge of the x-axis corresponds to a washing step in which the flooding device is completely switched off, while the value 1 at the right edge of the x-axis corresponds to a washing step in which the flooding device 4 is permanently switched on.
  • the washing effect or washing power achieved with the respective circulating-holding quotient is plotted in percent relative to the washing effect when the flooding device 4 is switched off. This means that the y-axis starts at 100%, that is the washing effect with permanently switched off flooding device 4. With continuous flooding, ie with a circulation-holding quotient of 1, the washing effect is about 107%.
  • the diagram in the Fig. 2 was determined experimentally.
  • the washing machine used for this is designed for a maximum load of 8kg of laundry.
  • the load was about 4 kg, and the tub was filled with washing liquid so far that resulted in a free liquor of 4.5 liters. From the curve it can be seen that the washing effect increases with increasing circulating-holding quotient and decreases again after reaching a maximum value.
  • the liquid exchange due to the scooping system of the drum and the liquid exchange due to the flooding seem to be in equilibrium, so that both effects contribute equally to the washing effect.
  • Fig. 3 represents a first curve 61, the liquid level measured in the tub 2 over time during a washing step for the case in which the circulating-holding quotient is about 0.5.
  • This liquid level is plotted along the y-axis in millimeters (mm), while along the x-axis the time is plotted in seconds.
  • the duration of a flooding phase is equal to the duration of a holding phase and is about 150 seconds.
  • a second curve 62 in the diagram in FIG Fig. 3 shows the control of the flooding device 4, which has a rectangular shape. It is therefore an intermittent or pulsed control of the flooding device. 4
  • the drum 3 rotates at a speed of about 50 U / min.
  • the first curve 61 are superimposed wave-shaped deflections. These regular fluctuations of the liquid level arise due to the scooping system.
  • the curve in the Fig. 2 determined for certain load and free fleet parameters.
  • the optimum circulating-holding quotient ie the circulating-holding quotient at which the washing effect is maximum, was about 0.5.
  • the optimum circulating-holding quotient depends on the loading weight of the laundry introduced into the drum 3 and on the volume of the free liquor in the tub 2. This will be in the Fig. 4 and 5 shown.
  • the Fig. 4 shows the course of the optimal float-hold quotient, which is plotted along the y-axis, as a function of the load weight, which is plotted along the x-axis in kg.
  • the washing machine used here is designed for a maximum load weight of 8kg.
  • the optimal circulating-holding quotient decreases with increasing load weight and varies between about 0.4 for 8 kg of laundry and about 0.5 for 1 kg of laundry.
  • At a loading of 4.5 kg results in an optimal Umflut-Halte quotient of about 0.5, which is the in Fig. 2 illustrated case corresponds.
  • the Fig. 5 shows the course of the optimal float-hold quotient, plotted along the y-axis, as a function of the volume of the free liquor plotted along the x-axis in liters.
  • the volume of the free liquor is hereby measured in the idle state, that is, when the circulating pump 41 and the drain pump 6 are switched off.
  • the optimum circulating-holding quotient increases with increasing volume of the free liquor from about 0.25 at 2 liters to about 0.8 at 8 liters. If the volume is less than 2 liters, it is not sensible to determine the optimum retention / quenching ratio, since it is not possible to exchange the liquor adequately.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP20140164760 2013-04-19 2014-04-15 Procédé de fonctionnement d'un lave-linge avec dispositif de recirculation et lave-linge Withdrawn EP2792782A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013103965.0A DE102013103965A1 (de) 2013-04-19 2013-04-19 Verfahren zum Betreiben einer Waschmaschine mit Umfluteinrichtung und Waschmaschine

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EP2792782A1 true EP2792782A1 (fr) 2014-10-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3640389A1 (fr) * 2018-10-16 2020-04-22 LG Electronics Inc. -1- Appareil de blanchisserie et son procédé de commande
CN111742092A (zh) * 2018-02-22 2020-10-02 Lg电子株式会社 洗衣装置及其控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016206047A1 (de) * 2016-04-12 2017-10-12 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung
DE102019117282A1 (de) * 2019-06-27 2020-12-31 Miele & Cie. Kg Verfahren zum Betreiben einer Waschmaschine und Waschmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742307A1 (fr) * 1995-05-12 1996-11-13 Kabushiki Kaisha Toshiba Machine à laver à tambour et procédé de lavage
DE19908804A1 (de) * 1999-03-01 2000-09-07 Bsh Bosch Siemens Hausgeraete Verfahren zum Betrieb einer Waschmaschine und automatisch gesteuerte Waschmaschine hierfür
EP1502986A1 (fr) * 2003-07-31 2005-02-02 Samsung Electronics Co., Ltd. Machine à laver
EP2314753A1 (fr) * 2009-10-20 2011-04-27 Electrolux Home Products Corporation N.V. Procédé pour effectuer un cycle de rinçage durant un processus de nettoyage dans une machine à laver
EP2348151A1 (fr) * 2010-01-25 2011-07-27 Miele & Cie. KG Procédé de fonctionnement d'un lave-linge, dispositif d'écoulement et lave-linge
WO2013031047A1 (fr) * 2011-09-02 2013-03-07 パナソニック株式会社 Machine à laver du type à tambour
US20130081431A1 (en) * 2011-09-30 2013-04-04 Electrolux Home Products, Inc. Water Recirculation and Drum Rotation Control in a Laundry Washer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113443A1 (de) * 1981-04-03 1982-10-21 Wilh. Cordes GmbH & Co Maschinenfabrik, 4740 Oelde "wasch- oder spuelmaschine"
DE102008055643A1 (de) * 2008-11-03 2010-05-20 Miele & Cie. Kg Verfahren zum Betreiben einer Waschmaschine und Waschmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742307A1 (fr) * 1995-05-12 1996-11-13 Kabushiki Kaisha Toshiba Machine à laver à tambour et procédé de lavage
DE19908804A1 (de) * 1999-03-01 2000-09-07 Bsh Bosch Siemens Hausgeraete Verfahren zum Betrieb einer Waschmaschine und automatisch gesteuerte Waschmaschine hierfür
EP1502986A1 (fr) * 2003-07-31 2005-02-02 Samsung Electronics Co., Ltd. Machine à laver
EP2314753A1 (fr) * 2009-10-20 2011-04-27 Electrolux Home Products Corporation N.V. Procédé pour effectuer un cycle de rinçage durant un processus de nettoyage dans une machine à laver
EP2348151A1 (fr) * 2010-01-25 2011-07-27 Miele & Cie. KG Procédé de fonctionnement d'un lave-linge, dispositif d'écoulement et lave-linge
WO2013031047A1 (fr) * 2011-09-02 2013-03-07 パナソニック株式会社 Machine à laver du type à tambour
US20130081431A1 (en) * 2011-09-30 2013-04-04 Electrolux Home Products, Inc. Water Recirculation and Drum Rotation Control in a Laundry Washer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111742092A (zh) * 2018-02-22 2020-10-02 Lg电子株式会社 洗衣装置及其控制方法
AU2019224719B2 (en) * 2018-02-22 2022-03-24 Lg Electronics Inc. Washing apparatus and method for controlling same
EP3757269A4 (fr) * 2018-02-22 2022-04-06 LG Electronics Inc. Appareil de lavage et son procédé de commande
EP4137630A1 (fr) * 2018-02-22 2023-02-22 LG Electronics Inc. Appareil de lavage et son procédé de commande
EP4141159A1 (fr) * 2018-02-22 2023-03-01 LG Electronics Inc. Appareil de lavage et son procédé de commande
EP3640389A1 (fr) * 2018-10-16 2020-04-22 LG Electronics Inc. -1- Appareil de blanchisserie et son procédé de commande
US11624138B2 (en) 2018-10-16 2023-04-11 Lg Electronics Inc. Laundry apparatus and control method thereof

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