EP1527223B1 - Method for accelerating the wetting of washing in a drum washing machine - Google Patents

Method for accelerating the wetting of washing in a drum washing machine Download PDF

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Publication number
EP1527223B1
EP1527223B1 EP03783991A EP03783991A EP1527223B1 EP 1527223 B1 EP1527223 B1 EP 1527223B1 EP 03783991 A EP03783991 A EP 03783991A EP 03783991 A EP03783991 A EP 03783991A EP 1527223 B1 EP1527223 B1 EP 1527223B1
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EP
European Patent Office
Prior art keywords
drum
phase
washing
water
laundry
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.)
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EP03783991A
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German (de)
French (fr)
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EP1527223A1 (en
Inventor
Gundula Czyzewski
Ingo Schulze
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP1527223A1 publication Critical patent/EP1527223A1/en
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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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/34—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed

Definitions

  • the invention relates to a method for accelerated wetting of laundry in a speed-controlled driven drum of a program-controlled drum washing machine with means for detecting the amount of filled into the drum laundry and with a controllable fresh water filling device and a measuring device for the amount of water and for the level of Washing liquid and with a control device for influencing the course of movement of the loaded drum.
  • the invention is therefore based on the object to make sure in a method described above under acceleration of the mesh phase that the subsequent washing in each case sufficient washing liquid is available and that depending on the load and the Absorbency of the Wäschepostens only as much water is consumed, as is absolutely necessary.
  • the program section for wetting comprises at least three phases in which in the first phase dependent on the absorbency, to be introduced amount of fresh water is or is determined.
  • a ratio between the degree of the current amount of water and the current liquor level is carried out to measure the amount of fresh water to be filled and this relationship is set in relation to the gradient of the leach level increase. Then no overfilling of the tub of the washing machine will take place, because at the beginning too much water for a possibly below average absorbent laundry items was already filled.
  • the drum In another phase, after reaching the amount of water introduced into the tub, the drum is moved for a first certain time in a manner that achieves uniform moistening of the laundry load, and in the last phase the drum is stopped and / or at a Wet the laundry suitable speed a second certain time continuously driven and driven in one direction and set the required amount of washing liquid required for the subsequent washing phase until the end of the second specific time and possibly filled and then the drum at a suitable speed for washing intermittently and reversing driven.
  • intelligent control systems can learn from data on the completed filling processes to better calculate the amount of laundry estimated before the start of the filling process. Overall, this results in a finer adjustment of the amount of water to be filled even at higher loadings.
  • Fig. 1 illustrated by the dashed line diagram 1 for the amount q of the filled water.
  • the solid line 2 shows the drum movement on the basis of speed levels n.
  • the first phase A in which the inflowing water quantity and the liquor level are measured continuously, lasts about two minutes and is characterized by rapid filling with fresh water and by slow drum rotation with approx. 25 rpm continuously in one direction.
  • the ratio of the measured values of the liquor quantity and the liquor level or their difference contain an indication of the absorbency capacity of the laundry lot. Together with the value for the gradient of the Laugenstandzuddling during the rotation of the laundry drum can be calculated from these measurements quite accurately .der the value of the amount of laundry costs or for its Automatsaugschreib and thus the amount for the initial filling with fresh water. Instead of the calculation, a predetermined amount for the first filling may have been set, which is based on a minimum absorbency of a laundry item to be treated.
  • the drum begins to rotate about three times at intervals and reversing at about 50 rpm.
  • This phase serves to intensify the wetting of the laundry, which is expressed in a sinking over the duration of the phase B Laugenstand. Instead of or in addition to this measure, other measures to intensify wetting may also be used.
  • the gradient of this Laugenstandsenkung can turn very sure close to the amount of laundry, whereby the accuracy of the estimated value in the first phase A value can be significantly improved.
  • the measured value of the current liquor level also gives the possibility of determining the type of washing via the absorbency capacity in comparison to the total amount of water that has flowed.
  • the phase B lasts about three minutes and ends with the transition of the drum movement from the reversing operation in the continuous operation with again only about 25 rpm. In the transition may also be a more or less long drum standstill phase.
  • the settling phase C any level control of the washing liquid is avoided.
  • the laundry has time to continue to fill with water, absorbing water to a certain extent.
  • the superficial fiber wetting penetrates deeper into the fibers.
  • the direction of rotation of the drum may advantageously be chosen that in which the water is distributed by scooping the drum particularly effective over the laundry.
  • Phase C lasts about half a minute, but despite its brevity, it is very important because it avoids the need for an additional refueling process later, for example, when the absorption process has been delayed.
  • the controller has gained so much data on the course of the suction processes from the measurements of the inflowing water quantity and the liquor level that it was possible to calculate a specific quantity for a final fresh water supply that seldom exceeds 0.5 liters.
  • phase D the subsequent washing process
  • the drum can be stopped again for a more or less short time.
  • the comparison of the method according to the invention with methods of the prior art in Fig. 2 For the sake of simplicity, only the level characteristics for the liquor container filling are shown.
  • the horizontal dashed lines show the upper and lower switching points of the level control.
  • the middle thick dashed and the thick solid line respectively shows the Level characteristic for a load of 3 kg or 5 kg dry laundry and filling process according to the invention.
  • the thin dotted line shows the level line in a prior art filling process, with different loading levels being expressed only in the number of refueling operations. From this comparison, the advantage of the method according to the invention can be clearly seen.
  • the filling with washing liquid required for washing is much more complete than in the prior art. Therefore, the actual washing process, which begins with reaching the required level and the required temperature, has recently begun much earlier and is also freed of additional cold water and associated temperature drops.

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

Description

Die Erfindung betrifft ein Verfahren zum beschleunigten Benetzen von Wäsche in einer drehzahlgeregelt angetriebenen Trommel einer programmgesteuerten Trommelwaschmaschine mit einer Einrichtung zum Feststellen der Menge der in die Trommel eingefüllten Wäsche und mit einer regelbaren Frischwasser-Einfüllvorrichtung und einer Messeinrichtung für die eingefüllte Wassermenge und für das Niveau der Waschflüssigkeit sowie mit einer Steuereinrichtung zum Beeinflussen des Bewegungsverlaufs der beladenen Trommel.The invention relates to a method for accelerated wetting of laundry in a speed-controlled driven drum of a program-controlled drum washing machine with means for detecting the amount of filled into the drum laundry and with a controllable fresh water filling device and a measuring device for the amount of water and for the level of Washing liquid and with a control device for influencing the course of movement of the loaded drum.

Ein derartiges Verfahren ist aus der EP 0 318 761 A1 bekannt. Darin wird durch Schöpfeinrichtungen am Trommelmantel beim Drehen der Trommel mit einer erheblich unterhalb der Drehzahl, die zum Waschen geeignet ist, liegenden Netzdrehzahl erreicht, dass die vorher trocken eingefüllte Wäsche in relativ kurzer Zeit benetzt wird. Allerdings ist das bekannte Verfahren zu starr und nimmt keine Rücksicht auf unterschiedlich saugfähige Wäscheposten. Dadurch wird in den meisten Fällen mehr Wasser eingesetzt, als für den gerade vorliegenden Wäscheposten nötig wäre. Außerdem kann auch die Dauer der Netzphase mit ihren erheblich mehr als fünf Minuten nicht befriedigen.Such a method is known from EP 0 318 761 A1 known. This is achieved by scooping the drum shell during rotation of the drum at a considerably below the speed, which is suitable for washing, lying net speed that the previously dry-filled laundry is wetted in a relatively short time. However, the known method is too rigid and takes no account of differently absorbent laundry items. As a result, more water is used in most cases than would be necessary for the currently available laundry items. In addition, the duration of the network phase can not satisfy with their considerably more than five minutes.

Auch das Verfahren aus EP 0 787 848 A1 erlaubt keine zufriedenstellende Benetzung. Hier wird zwar die Beladung bei der Zufuhr des Frischwasser mit berücksichtigt, allerdings wird immer eine festgelegte Wassermenge zugeführt und dann abgewartet, bis die Wäsche Wasser aufgesaugt hat. Es wird keinerlei Beziehung ermittelt zwischen dem Laugenstand und dem zugelaufenen Wasser. Somit kann auch hier die benötigte Wassermenge nur ungefähr bestimmt werden.Also the procedure off EP 0 787 848 A1 does not allow satisfactory wetting. Here, although the load in the supply of fresh water is taken into account, however, a fixed amount of water is always supplied and then waited until the laundry has absorbed water. There is no relationship between the liquor level and the accumulated water. Thus, even here, the required amount of water can only be determined approximately.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einem eingangs beschriebenen Verfahren unter Beschleunigung der Netzphase sicher zu stellen, dass zum nachfolgenden Waschen in jedem Falle genügend Waschflüssigkeit zur Verfügung steht und dass in Abhängigkeit von der Beladung und der Saugfähigkeit des Wäschepostens nur soviel Wasser verbraucht wird, wie unbedingt nötig ist.The invention is therefore based on the object to make sure in a method described above under acceleration of the mesh phase that the subsequent washing in each case sufficient washing liquid is available and that depending on the load and the Absorbency of the Wäschepostens only as much water is consumed, as is absolutely necessary.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren gelöst, bei dem der Programmabschnitt zum Benetzen mindestens drei Phasen umfasst, bei denen in der ersten Phase eine von der Saugfähigkeit abhängige, einzuführende Menge Frischwasser bestimmt ist oder wird. Hierbei wird zur Bemessung der Menge des einzufüllenden Frischwassers eine Verhältnisbildung zwischen dem Maß der aktuellerweise zugeflossenen Wassermenge und dem aktuellen Laugenstand vorgenommen und dieses Verhältnis mit dem Gradienten des Laugenstandzuwachses in Beziehung gesetzt. Dann wird in keinem Fall eine Überfüllung des Laugenbehälters der Waschmaschine stattfinden, weil etwa bereits anfangs zu viel Wasser für einen vielleicht unterdurchschnittlich saugfähigen Wäscheposten eingefüllt worden war. In einer weiteren Phase wird nach Erreichen der in den Laugenbehälter eingefüllten Wassermenge die Trommel eine erste bestimmte Zeit lang in einer Weise bewegt, durch die eine gleichmäßige Durchfeuchtung des Wäschepostens erreicht wird, und in der letzten Phase wird die Trommel angehalten und/oder mit einer zum Benetzen der Wäsche geeigneten Drehzahl eine zweite bestimmte Zeit lang dauernd und in einer Richtung angetrieben und die erforderliche Menge der für die anschließende Waschphase benötigten Waschflüssigkeit erst nach Ende der zweiten bestimmten Zeit festgelegt und ggf. aufgefüllt und danach die Trommel mit einer zum Waschen geeigneten Drehzahl intervallartig und reversierend angetrieben.This object is achieved by a method in which the program section for wetting comprises at least three phases in which in the first phase dependent on the absorbency, to be introduced amount of fresh water is or is determined. In this case, a ratio between the degree of the current amount of water and the current liquor level is carried out to measure the amount of fresh water to be filled and this relationship is set in relation to the gradient of the leach level increase. Then no overfilling of the tub of the washing machine will take place, because at the beginning too much water for a possibly below average absorbent laundry items was already filled. In another phase, after reaching the amount of water introduced into the tub, the drum is moved for a first certain time in a manner that achieves uniform moistening of the laundry load, and in the last phase the drum is stopped and / or at a Wet the laundry suitable speed a second certain time continuously driven and driven in one direction and set the required amount of washing liquid required for the subsequent washing phase until the end of the second specific time and possibly filled and then the drum at a suitable speed for washing intermittently and reversing driven.

Die erfindungsgemäßen Maßnahmen haben sich nach zahlreichen Versuchen als sehr geeignet erwiesen. In nahezu allen Beladungsvarianten konnten Vorteile in den vorstehend beschriebenen Kriterien der Aufgabenstellung gefunden werden.The measures according to the invention have proved to be very suitable after numerous attempts. In almost all loading variants advantages could be found in the criteria of the task described above.

Das erfindungsgemäße Verfahren kann durch zahlreiche Variationen, wie sie in den Unteransprüchen angegeben sind, vorteilhaft ausgestaltet werden.The method according to the invention can be advantageously designed by numerous variations, as indicated in the subclaims.

Aber auch die anderen in den Unteransprüchen angegebenen Maßnahmen tragen je für sich zur Verbesserung der aufgabengemäßen Wirkung bei. Dabei wird auch verhindert, dass durch unkalkulierte und nicht zu definierende Nachfüllschritte wie bei bekannten Verfahren zum Bemessen der Waschflüssigkeitsmenge die Wascheffizienz beeinträchtigt wird, weil Temperaturschocks und Schwankungen der Waschmittelkonzentration etwa den gleichmäßigen Ablauf des Waschprozesses stören können. Außerdem kann die Heizung der Waschflüssigkeit in den meisten Fällen früher beginnen und gleichmäßiger erfolgen als beim Stand der Technik, weil das die Heizkörper bedeckende Niveau des eingefüllten Wassers schneller erreicht wird.But the other measures specified in the dependent claims each contribute to improve the task-related effect. It is also prevented that by unpredictable and not to be defined refilling steps as in known methods for measuring the amount of washing liquid, the washing efficiency is impaired, because temperature shocks and fluctuations in the detergent concentration can disturb about the smooth flow of the washing process. In addition, the heating of the washing liquid in most cases can begin sooner and be more uniform than in the prior art, because the radiator-covering level of the filled water is reached faster.

Ferner können intelligente Steuerungssysteme aus Daten über die abgewickelten Einfüllprozesse lernen, die vor Beginn des Einfüllvorgangs abgeschätzte Wäschemenge besser zu kalkulieren. Insgesamt ergibt sich dadurch eine feinere Anpassung der einzufüllenden Wassermengen auch bei höheren Beladungsmengen.Furthermore, intelligent control systems can learn from data on the completed filling processes to better calculate the amount of laundry estimated before the start of the filling process. Overall, this results in a finer adjustment of the amount of water to be filled even at higher loadings.

Anhand von in der Zeichnung dargestellten Diagrammen sind das erfindungsgemäße Verfahren und einzelne Ausgestaltungen des Verfahrens näher erläutert. Es zeigen

Fig. 1
einen Ablauf der Frischwasserzufuhr am Beginn eines Waschprozesses zusammen mit den zugeordneten Trommelbewegungsphasen und
Fig. 2
eine Gegenüberstellung der Abläufe des erfindungsgemäßen Verfahrens bei zwei unterschiedlichen Beladungen im Vergleich zum starren aber dennoch unkalkulierbaren Verfahren gemäß dem Stand der Technik.
On the basis of diagrams shown in the drawing, the inventive method and individual embodiments of the method are explained in detail. Show it
Fig. 1
a flow of fresh water at the beginning of a washing process along with the associated drum motion phases and
Fig. 2
a comparison of the processes of the method according to the invention at two different loads in comparison to the rigid but incalculable method according to the prior art.

Zu Beginn eines Waschprozesses wird nach dem Verfahren gemäß der Erfindung in drei Stufen Frischwasser in den Laugenbehälter eingeführt, zunächst 0,5 Liter, dann 1,5 Liter und schließlich ca. 2,5 Liter. Dies ist in Fig. 1 durch die gestrichelte Diagrammlinie 1 für die Menge q des eingefüllten Wassers verdeutlicht. Im selben Diagramm wird durch die ausgezogene Linie 2 die Trommelbewegung anhand von Drehzahlniveaus n dargestellt. Die erste Phase A, in der ständig die zugeflossene Wassermenge und der Laugenstand gemessen werden, dauert etwa zwei Minuten und ist durch schnelles Befüllen mit Frischwasser und durch langsames Trommeldrehen mit ca. 25 Upm ständig in einer Richtung gekennzeichnet.At the beginning of a washing process fresh water is introduced into the tub in three stages according to the method according to the invention, initially 0.5 liter, then 1.5 liters and finally about 2.5 liters. This is in Fig. 1 illustrated by the dashed line diagram 1 for the amount q of the filled water. In the same diagram, the solid line 2 shows the drum movement on the basis of speed levels n. The first phase A, in which the inflowing water quantity and the liquor level are measured continuously, lasts about two minutes and is characterized by rapid filling with fresh water and by slow drum rotation with approx. 25 rpm continuously in one direction.

Das Verhältnis der Messwerte der Laugenmenge und des Laugenstandes oder deren Differenz enthalten einen Hinweis auf die Saugfähigkeitskapazität des Wäschepostens. Zusammen mit dem Wert für den Gradienten der Laugenstandzunahme während der Drehung der Wäschetrommel kann aus diesen Messwerten schon verhältnismäßig genau .der Wert für die Menge des Wäschepostens bzw. für dessen Gesamtsaugfähigkeit und damit auch die Menge für die Erstbefüllung mit Frischwasser errechnet werden. Anstelle der Berechnung kann auch eine vorher festgesetzte Menge fürdie Erstbefüllung festgelegt worden sein, die sich an einer Mindestsaugfähigkeit eines zu behandelnden Wäschepostens orientiert.The ratio of the measured values of the liquor quantity and the liquor level or their difference contain an indication of the absorbency capacity of the laundry lot. Together with the value for the gradient of the Laugenstandzunahme during the rotation of the laundry drum can be calculated from these measurements quite accurately .der the value of the amount of laundry costs or for its Gesamtsaugfähigkeit and thus the amount for the initial filling with fresh water. Instead of the calculation, a predetermined amount for the first filling may have been set, which is based on a minimum absorbency of a laundry item to be treated.

Sobald die dritte Teilmenge Frischwasser eingefüllt ist, beginnt in der weiteren Phase B die Trommel ca. dreimal intervallartig und reversierend mit ca. 50 Upm zu drehen. Diese Phase dient dazu, die Benetzung der Wäsche zu intensivieren, was sich in einem über die Dauer der Phase B sinkenden Laugenstand ausdrückt. Anstelle oder zusätzlich zu dieser Maßnahme können auch andere Maßnahmen zur Intensivierung der Benetzung angewendet werden. Der Gradient dieser Laugenstandsenkung lässt wiederum sehr sicher auf die Wäschemenge schließen, wodurch die Genauigkeit des in der ersten Phase A abgeschätzten Wertes wesentlich verbessert werden kann. Der Messwert des aktuellen Laugenstands gibt außerdem im Vergleich zu der insgesamt zugeflossenen Wassermenge die Möglichkeit, über die Saugfähigkeitskapazität die Wäscheart zu bestimmen.As soon as the third subset of fresh water is filled, in the further phase B, the drum begins to rotate about three times at intervals and reversing at about 50 rpm. This phase serves to intensify the wetting of the laundry, which is expressed in a sinking over the duration of the phase B Laugenstand. Instead of or in addition to this measure, other measures to intensify wetting may also be used. The gradient of this Laugenstandsenkung can turn very sure close to the amount of laundry, whereby the accuracy of the estimated value in the first phase A value can be significantly improved. The measured value of the current liquor level also gives the possibility of determining the type of washing via the absorbency capacity in comparison to the total amount of water that has flowed.

Die Phase B dauert ungefähr drei Minuten und endet mit dem Übergang der Trommelbewegung vom reversierenden Betrieb in den kontinuierlichen Betrieb mit abermals nur ca. 25 Upm. Im Übergang kann auch noch eine mehr oder weniger lange Trommelstillstandsphase liegen. Während dieser letzten Phase, der Beruhigungsphase C, wird jegliche Niveauregulierung der Waschflüssigkeit vermieden. In dieser Phase C hat die Wäsche Zeit, sich weiterhin mit Wasser zu füllen, Wasser gewissermaßen zu Absorbieren. Dabei dringen die vorerst oberflächlichen Faserbenetzungen tiefer in die Fasern ein. Als Drehrichtung der Trommel kann vorteilhafterweise diejenige gewählt sein, bei der das Wasser durch Schöpfeinrichtungen an der Trommel besonders wirksam über die Wäsche verteilt wird.The phase B lasts about three minutes and ends with the transition of the drum movement from the reversing operation in the continuous operation with again only about 25 rpm. In the transition may also be a more or less long drum standstill phase. During this last phase, the settling phase C, any level control of the washing liquid is avoided. In this phase C the laundry has time to continue to fill with water, absorbing water to a certain extent. The superficial fiber wetting penetrates deeper into the fibers. As the direction of rotation of the drum may advantageously be chosen that in which the water is distributed by scooping the drum particularly effective over the laundry.

Die Phase C dauert etwa eine halbe Minute, ist aber trotz ihrer Kürze sehr wichtig, weil sie vermeidet, dass später noch ein zusätzlicher Nachtankvorgang eingeschaltet wird, wenn sich etwa der Absorptionsvorgang verzögert hatte. Inzwischen hat die Steuerung aus den Messungen der zugeflossenen Wassermenge und des Laugenstandes so viele Daten über den Ablauf der Saugvorgänge gewonnen, dass daraus eine bestimmte Menge für eine letzte Frischwassergabe errechnet werden konnte, die selten größer als 0,5 Liter ist. Mit dieser letzten Füllung ist die benötigte und gerade ausreichende Menge an insgesamt erforderlicher Waschflüssigkeit tatsächlich so genau definiert, dass der folgende Waschvorgang (Phase D), während dem die Trommel wieder intervallartig und reversierend mit ca. 50 Upm gedreht wird, durch keine weiteren kalten Frischwassergaben mehr gestört wird. Auch vor oder während der letzten Frischwasserzugabe kann die Trommel nochmals für eine mehr oder weniger kurze Zeit angehalten werden.Phase C lasts about half a minute, but despite its brevity, it is very important because it avoids the need for an additional refueling process later, for example, when the absorption process has been delayed. In the meantime, the controller has gained so much data on the course of the suction processes from the measurements of the inflowing water quantity and the liquor level that it was possible to calculate a specific quantity for a final fresh water supply that seldom exceeds 0.5 liters. With this last filling the required and just sufficient amount of total required washing liquid is actually defined so precisely that the subsequent washing process (phase D), during which the drum is again rotated intermittently and reversing at about 50 rpm, by no further cold fresh water more is disturbed. Also before or during the last fresh water addition, the drum can be stopped again for a more or less short time.

Die Gegenüberstellung des erfindungsgemäßen Verfahrens mit Verfahren aus dem Stand der Technik in Fig. 2 zeigt der Einfachheit halber nur die Niveaukennlinien für die Laugenbehälterfüllung. Die waagerechten gestrichelten Linien zeigen den oberen und den unteren Schaltpunkt der Niveauregelung. Die mitteldicke gestrichelte bzw. die dicke durchgezogene Linie zeigt jeweils die Niveaukennlinie für eine Beladung mit 3 kg bzw. 5 kg trockener Wäsche und Befüllungsvorgang gemäß der Erfindung. Die dünne punktierte Linie zeigt dagegen die Niveaulinie bei einem Befüllungsvorgang gemäß dem Stand der Technik, wobei unterschiedliche Beladungsmengen sich lediglich in der Zahl der Nachtankvorgänge ausdrücken. Aus dieser Gegenüberstellung ist der Vorteil des erfindungsgemäßen Verfahrens deutlich zu erkennen. Die zum Waschen benötigte Füllung mit Waschflüssigkeit ist viel eher abgeschlossen als beim Stand der Technik. Daher kann der eigentliche Waschvorgang, der mit Erreichen des erforderlichen Niveaus und der erforderlichen Temperatur beginnt, neuerdings viel früher beginnen und ist zudem von zusätzlichen Kaltwassergaben und damit einhergehenden Temperaturstürzen befreit.The comparison of the method according to the invention with methods of the prior art in Fig. 2 For the sake of simplicity, only the level characteristics for the liquor container filling are shown. The horizontal dashed lines show the upper and lower switching points of the level control. The middle thick dashed and the thick solid line respectively shows the Level characteristic for a load of 3 kg or 5 kg dry laundry and filling process according to the invention. The thin dotted line, on the other hand, shows the level line in a prior art filling process, with different loading levels being expressed only in the number of refueling operations. From this comparison, the advantage of the method according to the invention can be clearly seen. The filling with washing liquid required for washing is much more complete than in the prior art. Therefore, the actual washing process, which begins with reaching the required level and the required temperature, has recently begun much earlier and is also freed of additional cold water and associated temperature drops.

Claims (10)

  1. Method for accelerated wetting of laundry in a drum, which is driven with rotational speed regulation, of a program-controlled drum washing machine with equipment for ascertaining the amount of laundry filled into the drum and with a regulable fresh water filling device and a measuring device for the introduced water quantity (q) and for the level of the washing liquid as well as with control equipment for influencing the course of movement of the loaded drum, wherein the program segment for wetting comprises at least three phases, in which:
    in the first phase (A) a quantity of fresh water which is dependent on the absorption capability and which is to be introduced is or will be determined,
    in a further phase (B) after attainment of the water quantity introduced into the solution container the drum is moved for a first determined time, for example approximately 3 minutes, in a manner by which uniform moistening through of the laundry batch is achieved and
    in the last phase (C) the drum is stopped and/or driven at a rotational speed, for example approximately 25 rpm, suitable for wetting the laundry for a second determined time, for example approximately 30 seconds, and in one direction and
    the requisite quantity of washing liquid needed for the subsequent washing phase (D) is established and optionally added only after the end of the second determined time and thereafter the drum is periodically and reversibly driven at a rotational speed, for example approximately 50 rpm, suitable for washing,
    characterised in that in the first phase (A) formation of a ratio between the size of the water quantity that has currently flowed in and the current solution state is undertaken for measuring the quantity (q) of the fresh water to be introduced and this ratio is correlated with the gradient of the increase in the solution state.
  2. Method according to claim 1, characterised in that the introduction of the fresh water on the first occasion is carried out in at least two steps.
  3. Method according to claim 1 or 2, characterised in that the drum is periodically and reversibly driven in the further phase (B) at a rotational speed, for example approximately 50 rpm, suitable for the washing.
  4. Method according to any one of claims 1 to 3, characterised in that in the last phase (C) that drum rotational direction is selected in which the water is distributed particularly effectively over the laundry by scoop devices at the drum.
  5. Method according to any one of claims 1 to 4, characterised in that the first determined time of the further phase (B) is or will be determined by a gradient limit value of the decline in the solution state in this further phase (B).
  6. Method according to claim 5, characterised in that the first determined time preferably permits three reversing cycles for the drum movement.
  7. Method according to claim 6, characterised in that the second predetermined time lies below 1 minute.
  8. Method according to any one of the preceding claims, characterised in that the duration of the last phase (C) and/or of the drive in the last phase (C) is or will be determined by the absorption behaviour of the laundry batch introduced into the drum.
  9. Method according to any one of the preceding claims, characterised in that the quantity of washing liquid needed for the washing phase (D) subsequent to the last phase (C) is produced by a single defined addition of water at the start of the washing phase (D).
  10. Method according to any one of the preceding claims, characterised in that during the first introduction of water in the first phase (A) the drum is already moved at a rotational speed, for example 25 rpm, at which the effect of scoop devices at the drum circumference is particularly large.
EP03783991A 2002-07-29 2003-06-26 Method for accelerating the wetting of washing in a drum washing machine Expired - Lifetime EP1527223B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10234473 2002-07-29
DE10234473A DE10234473A1 (en) 2002-07-29 2002-07-29 A method for acceleration of the absorption of water in the dry wash load of an automatic washing machine, using a controlled sequence of alternate direction tumbles at different speeds
PCT/EP2003/006769 WO2004015187A1 (en) 2002-07-29 2003-06-26 Method for accelerating the wetting of washing in a drum washing machine

Publications (2)

Publication Number Publication Date
EP1527223A1 EP1527223A1 (en) 2005-05-04
EP1527223B1 true EP1527223B1 (en) 2013-01-23

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EP03783991A Expired - Lifetime EP1527223B1 (en) 2002-07-29 2003-06-26 Method for accelerating the wetting of washing in a drum washing machine

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US (1) US8510886B2 (en)
EP (1) EP1527223B1 (en)
KR (1) KR100758443B1 (en)
CN (1) CN100549276C (en)
DE (1) DE10234473A1 (en)
PL (1) PL373325A1 (en)
WO (1) WO2004015187A1 (en)

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Publication number Publication date
CN100549276C (en) 2009-10-14
CN1671908A (en) 2005-09-21
PL373325A1 (en) 2005-08-22
US20050204481A1 (en) 2005-09-22
KR100758443B1 (en) 2007-09-14
WO2004015187A1 (en) 2004-02-19
KR20050027119A (en) 2005-03-17
US8510886B2 (en) 2013-08-20
EP1527223A1 (en) 2005-05-04
DE10234473A1 (en) 2004-02-12

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