EP2199449A2 - Method for controlling a household washing machine - Google Patents

Method for controlling a household washing machine Download PDF

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Publication number
EP2199449A2
EP2199449A2 EP09176814A EP09176814A EP2199449A2 EP 2199449 A2 EP2199449 A2 EP 2199449A2 EP 09176814 A EP09176814 A EP 09176814A EP 09176814 A EP09176814 A EP 09176814A EP 2199449 A2 EP2199449 A2 EP 2199449A2
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EP
European Patent Office
Prior art keywords
laundry
pressure
drum
washing machine
exposure time
Prior art date
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Granted
Application number
EP09176814A
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German (de)
French (fr)
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EP2199449B1 (en
EP2199449A3 (en
Inventor
Gundula Czyzewski
Marianne Röhl
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 EP2199449A3 publication Critical patent/EP2199449A3/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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
    • 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
    • D06F34/18—Condition of the laundry, e.g. nature or 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
    • D06F2103/02—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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/06—Type or material
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/10—Temperature of washing liquids; Heating means therefor
    • 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
    • D06F2105/42—Detergent or additive supply
    • 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
    • D06F2105/56—Remaining operation time; Remaining operational cycles

Definitions

  • the invention relates to a method for controlling the exposure time for the factors temperature, washing mechanics and detergent chemistry in a wet process for treating laundry in a program-controlled domestic washing machine in which determines the volume of the laundry to be treated and their nature and absorbency and the laundry in the interior of a an at least approximately horizontal axis within a tub in the bottom near the pressure of the liquor is measured, rotating laundry drum is lifted in sections and falls back to the lowest point of the laundry drum, and a corresponding washing machine.
  • the invention has for its object to provide a method of the type mentioned design, in which in adaptation of at least one of the other three parameters of the Sinner circle the time required for the treatment of the laundry in a washing machine can be shortened without affecting the usual wash results when varying the liquor temperature.
  • this object is achieved by the characterizing features of claim 1 in such a way that the time profile of the pressure readings when falling back of the laundry with a typical course for the set treatment program is compared, and determine the deviations from the typical course that measure, on the duration of the exposure time is set in a reverse to the mechanical effect of the pressure surges when falling back of the laundry behaving manner.
  • a washing machine with a tub, in the bottom of which a pressure transducer is connected, and a therein about an at least approximately horizontal axis rotatable laundry drum with means for lifting the laundry to be treated in it during the drive of the drum of a controlled by a control unit drum drive motor is in training of the method according to the invention arranged so that the pressure transducer is connected via a signal line to the controller, that the pressure transducer (13 to 16) via a signal line (18) to the control unit (17) is connected, that the control unit (17) a Contains memory for pressure readings and a comparison means by which the course of the currently measured pressure readings are compared with a stored history of pressure readings can, and that the exposure time in response to differences in history of pressure readings is changeable.
  • the diagram of Fig. 1 shows within short periods of each drum rotation with washing speed at different laundry items different types of mechanical effects ME on the laundry, measured on the basis of the pressure conditions in the liquor in the tub. Therefore, the pressure p is plotted on the ordinate and the time t on the abscissa. The pressure p0 corresponds to the level of the liquor filled in the tub.
  • Section I of a treatment process records the typical pressure surges in the liquor during a drum revolution, coming from a particular batch of laundry.
  • a drum revolution there are three pressure surges when the laundry drum has three followers, portions of which tumble down during drum rotation after being lifted from the floor to a high point in the laundry drum.
  • This is a laundry of plain cotton fabric with large items of laundry and a maximum load of, for example, 5 kg of dry laundry. If the laundry drum is well filled, individual laundry items no longer fall from a great height completely back to the bottom of the drum, so that the mechanical entry is limited in the laundry.
  • Section II shows more violent pressure surges in the same laundry drum, which, for example, to a laundry of bulky cotton fabric, z. B. from terry, with higher absorbency than the simple cotton fabric and medium-sized laundry parts and lower loading amount indicates, for. B. 3 kg dry laundry.
  • the pressure profile shown in section B is typical; his mechanics entry is correspondingly large against the pressure curve in section I, as the comparison of the amplitudes AI and AII illustrates the same number of pressure surges.
  • a pressure curve according to Section III for a laundry item, which consists of many small parts of simple cotton fabric in a likewise inferior amount of, for example, 3 kg.
  • the mechanical entry is greater overall than in a laundry article according to Section I. Because, although the amplitude AIII is smaller than the amplitude AI in Section I, but the number of pressure surges in Section III is considerably larger.
  • the three examples concern process combinations for the programs of the three types of laundry Cotton with large laundry parts, 5 kg dry laundry Terry towels with medium sized laundry parts, 3 kg dry linen and Cotton with small laundry parts, 3 kg dry laundry.
  • Each of these three programs has a typical pressure curve during drum rotation. Now, if such a program is selected, then the associated pressure profile is expected. If, however, the pressure profile deviates therefrom in such a way that the mechanical input is greater than during the typical pressure curve, then the corresponding treatment section may be shorter than intended.
  • the washing machine has a washing drum 1 mounted in a tub 2 at least approximately horizontally, which is driven by a pulley 3, a belt 4 and an electric motor 5.
  • a washing drum 1 mounted in a tub 2 at least approximately horizontally, which is driven by a pulley 3, a belt 4 and an electric motor 5.
  • the liquor can be discharged via a drain 8, a drain pump 9 and a pumping line 10 into the open.
  • the laundry 12 Due to the rotation of the laundry drum 1 in the direction of the arrow 11, the laundry 12 is detected by the drivers 1.1 to 1.3 and lifted high. Once a driver has lifted the laundry 12 as the driver 1.2 high, it falls from this raised position back down to the bottom of the laundry drum 1, where it is compressed. As a result, a mechanical work on the laundry, which contributes to the success of the washing effect.
  • the impact of the laundry on the bottom of the liquor causes there pressure shocks, which are detected by the measuring system.
  • a measuring line 13 is connected, which opens into a pressure transducer tube 14.
  • the pressure transducer tube 14 is connected to a pressure cell 16 which directs suitable pressure measuring signals via a signal line 18 to a control unit 17.
  • the control unit 17 is capable of the length of a program section according to Fig. 2 depending on the current mechanics entry.

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

Abstract

The method involves lifting a laundry (12) within an inner space of a washing drum (1) rotating about a horizontal axis within a suds tub (2), and rolling back the laundry to a deepest point of the washing drum. A time-based running of a pressure measurement value during rolling back of the laundry is compared with a typical running for a preset handling program. A deviation of the typical running is determined from the comparison result. Duration of an exposure time is adjusted in reciprocal to mechanical action of pressure impulses during rolling back of the laundry. An independent claim is also included for a household washing machine including a control device.

Description

Die Erfindung betrifft ein Verfahren zum Steuern der Einwirkungszeit für die Faktoren Temperatur, Waschmechanik und Waschmittelchemie bei einem Nassverfahren zum Behandeln von Wäsche in einer programmgesteuerten Haushaltwaschmaschine, in der das Volumen der zu behandelnden Wäsche und deren Art und Saugvermögen bestimmt und die Wäsche im Innenraum einer um eine wenigstens annähernd horizontale Achse innerhalb eines Laugenbehälters, in dessen Bodennähe der Druck der Lauge gemessen wird, sich drehenden Wäschetrommel streckenweise hochgehoben wird und wieder zum tiefsten Punkt der Wäschetrommel zurückfällt, und eine entsprechende Waschmaschine.The invention relates to a method for controlling the exposure time for the factors temperature, washing mechanics and detergent chemistry in a wet process for treating laundry in a program-controlled domestic washing machine in which determines the volume of the laundry to be treated and their nature and absorbency and the laundry in the interior of a an at least approximately horizontal axis within a tub in the bottom near the pressure of the liquor is measured, rotating laundry drum is lifted in sections and falls back to the lowest point of the laundry drum, and a corresponding washing machine.

In der Patentliteratur sind Beispiele bekannt, aus denen hervor geht, dass man das Verhältnis der vier aus dem Sinner'schen Kreis bekannten Faktoren Zeit, Temperatur, Waschmechanik und Waschmittelchemie zueinander bewusst jeweils verändert hat. Für einen einschlägigen Fachmann ist klar, dass durch den Sinner'schen Kreis die Summe der für das vollständige Waschverfahren erforderlichen Faktoren einen vollständigen Kreis von 360° bildet. Das bedeutet, dass bei Verkleinerung des Anteils für einen Faktor der Anteil wenigstens eines der anderen Faktoren entsprechend zu erhöhen ist. Damit sind unterschiedlichste Effekte angestrebt worden. Beispielweise ist mit einer bewussten Verlängerung der Einwirkzeit ( DE 30 27 584 A1 ) ein Energiespareffekt erzielt worden. Auch kann die Beladungsmenge, die einen Einfluss auf die Waschmechanik hat, auf die jeweilige Zeitdauer eines Programmabschnittes einen Einfluss ausüben. DE 10 2006 034 190 A1 erwähnt diesen Einfluss zwar, stellt aber nicht klar, in welche Richtung dieser Einfluss wirkt.In the patent literature examples are known from which it is clear that the ratio of the four known from the Sinner circle factors time, temperature, washing mechanics and detergent chemistry each other has deliberately changed. It will be apparent to one of ordinary skill in the art that Sinner's circle makes the sum of the factors required for the complete washing process a complete circle of 360 °. This means that if the fraction is reduced by one factor, the proportion of at least one of the other factors must be correspondingly increased. Thus, the most diverse effects have been sought. For example, with a conscious extension of the exposure time ( DE 30 27 584 A1 ) an energy saving effect has been achieved. Also, the loading amount, which has an influence on the washing mechanism, on the respective duration of a program section exert an influence. DE 10 2006 034 190 A1 Although mentioning this influence, it does not make it clear in what direction this influence works.

Der Stand der Technik gibt keinen Hinweis darauf, in welcher Weise eine Waschmaschinen-Steuerung funktionieren muss, um möglichst kurze Behandlungszeiten für die Wäsche einzuhalten. Benutzer von Waschmaschinen legen zwar Wert darauf, dass die Wäsche sauber gewaschen ist und dass die Einsätze von Wasser, Energie und Waschmittel möglichst gering sind. So zeigen DE 196 23 958 A1 und DE 697 12 380 T2 , auf welche Weise die aktuellen Beladungsmengen bzw. -arten ermittelt werden können, um mittels auf solche Weise gewonnener Werte die Verbrauche für Wasser und Energie zu optimieren. Wie jedoch dem ebenfalls vorhandenen Wunsch nach möglichst kurzer Prozessdauer begegnet werden kann, darüber liegen hieraus keine Vorschläge vor. Lediglich DE 29 51 926 A1 zeigt in Vertretung für eine notorische Maßnahme bei Waschmaschinen, dass eine aktive Variation der Laugentemperatur zur einer Beeinflussung der Dauer der aktiven Waschphase führen kann.The prior art gives no indication of the way in which a washing machine control must work in order to comply with the shortest possible treatment times for the laundry. Users of washing machines attach importance to the fact that the laundry is washed clean and that the use of water, energy and detergent is minimized. To show DE 196 23 958 A1 and DE 697 12 380 T2 how to determine the current load levels or types to optimize the consumption of water and energy using values obtained in this way. However, there are no suggestions as to how this can be countered by the desire to have as short a process as possible. Only DE 29 51 926 A1 In response to a notorious measure in washing machines, shows that active variation of the liquor temperature may affect the duration of the active wash phase.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu konzipieren, bei dem in Anpassung mindestens eines der übrigen drei Parameter des Sinner'schen Kreises der Zeitaufwand für die Behandlung der Wäsche in einer Waschmaschine verkürzt werden kann, ohne bei Variation der Laugentemperatur die sonst üblichen Waschergebnisse zu beeinträchtigen.The invention has for its object to provide a method of the type mentioned design, in which in adaptation of at least one of the other three parameters of the Sinner circle the time required for the treatment of the laundry in a washing machine can be shortened without affecting the usual wash results when varying the liquor temperature.

Gemäß der vorliegenden Erfindung wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruches 1 in der Weise gelöst, dass der zeitliche Verlauf der Druckmesswerte beim Zurückfallen der Wäsche mit einem typischen Verlauf für das eingestellte Behandlungsprogramm verglichen wird, und die Abweichungen vom typischen Verlauf dasjenige Maß bestimmen, auf das die Dauer der Einwirkungszeit in einer umgekehrt zur mechanischen Wirkung der Druckstöße beim Zurückfallen der Wäsche sich verhaltenden Weise eingestellt wird.According to the present invention, this object is achieved by the characterizing features of claim 1 in such a way that the time profile of the pressure readings when falling back of the laundry with a typical course for the set treatment program is compared, and determine the deviations from the typical course that measure, on the duration of the exposure time is set in a reverse to the mechanical effect of the pressure surges when falling back of the laundry behaving manner.

Dieser Idee liegt die Erkenntnis zugrunde, dass einer Zunahme von mechanischer Einwirkung auf die gerade behandelte Wäsche die Druckstöße in einem Wasserstandgeber sich verstärken. Die Waschmechanik resultierend aus dem Wäschevolumen und dem Gewicht der nassen Wäsche (Wäsche plus gebundene Flotte) wird bei geregelten Trommelantrieben durch quasi harmonische Schwingungen aus dem Druckverlauf abgebildet, der sich am tiefsten Punkt des Laugenbehälters einstellt. Regelmäßig wird der Druck mittels eines analogen Drucksensors gemessen. Da es für einen typischen Wäscheposten einen ebenso typischen Druckverlauf gibt, sind beim Vergleich mit einem aktuellen Druckverlauf Abweichungen herauszufiltern und darüber die Einwirkungszeit zu beeinflussen. Der typische Verlauf ist bedingt durch den Wäschefall und im Wesentlichen abhängig von der Trommelgeometrie (u. a. Anordnung und Form der Mitnehmer) und der Trommeldrehzahl. Auf diese Weise soll die Einwirkungszeit gegenüber einem notorischen Normalmaß verkürzt werden, wenn die mechanische Einwirkung auf die Wäsche aufgrund verstärkter Druckstöße erkennbar zunimmt.This idea is based on the knowledge that an increase of mechanical impact on the laundry being treated intensifies the pressure surges in a water level sensor. The washing mechanism resulting from the laundry volume and the weight of the wet laundry (laundry plus bound liquor) is reproduced in controlled drum drives by quasi-harmonic oscillations from the pressure curve, which sets at the lowest point of the tub. Regularly, the pressure is measured by means of an analogue pressure sensor. Since there is an equally typical pressure curve for a typical batch of laundry, deviations must be filtered out and influenced by the exposure time when compared with a current pressure curve. The typical course is due to the laundry case and essentially depends on the drum geometry (including the arrangement and shape of the driver) and the drum speed. In this way, the exposure time to a notorious standard should be shortened if the mechanical action on the laundry due to increased pressure surges noticeably increases.

Eine Waschmaschine mit einem Laugenbehälter, in dessen Bodennähe ein Druckmessgeber angeschlossen ist, und einer darin um eine wenigstens annähernd horizontal stehende Achse drehbaren Wäschetrommel mit Einrichtungen zum Anheben der in ihr zu behandelnden Wäsche während des Antriebs der Trommel von einem durch ein Steuergerät gesteuerten Trommelantriebsmotor, ist in Ausbildung des erfindungsgemäßen Verfahrens so eingerichtet, dass der Druckmessgeber über eine Signalleitung mit dem Steuergerät verbunden ist, dass der Druckmessgeber (13 bis 16) über eine Signalleitung (18) mit dem Steuergerät (17) verbunden ist, dass das Steuergerät (17) einen Speicher für Druckmesswerte und eine Vergleichseinrichtung enthält, durch die der Verlauf der aktuellerweise gemessenen Druckmesswerte mit einem gespeicherten Verlauf der Druckmesswerten verglichen werden können, und dass die Einwirkungszeit in Abhängigkeit von Verlaufs-Differenzen der Druckmesswerte veränderbar ist.A washing machine with a tub, in the bottom of which a pressure transducer is connected, and a therein about an at least approximately horizontal axis rotatable laundry drum with means for lifting the laundry to be treated in it during the drive of the drum of a controlled by a control unit drum drive motor is in training of the method according to the invention arranged so that the pressure transducer is connected via a signal line to the controller, that the pressure transducer (13 to 16) via a signal line (18) to the control unit (17) is connected, that the control unit (17) a Contains memory for pressure readings and a comparison means by which the course of the currently measured pressure readings are compared with a stored history of pressure readings can, and that the exposure time in response to differences in history of pressure readings is changeable.

Nun ist es andererseits möglich, die Druckstöße bewusst zu intensivieren, um damit die mechanische Komponente der Einwirkung auf die Wäsche zu verstärken. Als Folge davon kann dann die Einwirkungszeit gegenüber einem notorischen Normalmaß verkürzt werden.On the other hand, it is now possible to deliberately intensify the pressure surges in order to reinforce the mechanical component of the action on the laundry. As a result, the exposure time can then be shortened to a notorious normal.

Anhand von in der Zeichnung dargestellten Ausführungsbeispielen ist die Erfindung nachstehend näher erläutert. In der Zeichnung zeigen

  • Fig. 1 Druckverläufe während jeweils einer Trommelumdrehung bei unterschiedlichen Wäscheposten,
  • Fig. 2 ein Behandlungsprogramm-Abschnitt, der mit zwei unterschiedlich intensiven mechanischen Einwirkungen abläuft und
  • Fig.3 eine in einem Laugenbehälter drehbar gelagerte Wäschetrommel einer Waschmaschine mit Wasserwegen, einem Druckmessgeber und einem Steuergerät, die zum Durchführen des erfindungsgemäßen Verfahrens geeignet ist.
Reference to exemplary embodiments illustrated in the drawing, the invention is explained in more detail below. In the drawing show
  • Fig. 1 Pressure curves during each drum rotation at different laundry items,
  • Fig. 2 a treatment program section that runs with two different intense mechanical actions and
  • Figure 3 a washing drum rotatably mounted in a tub of a washing machine with waterways, a pressure transducer and a control unit, which is suitable for carrying out the method according to the invention.

Das Diagramm der Fig. 1 zeigt innerhalb kurzer Zeitabschnitte jeweils einer Trommelumdrehung mit Waschdrehzahl bei unterschiedlichen Wäscheposten unterschiedliche Arten von mechanischen Einwirkungen ME auf die Wäsche, gemessen anhand der Druckzustände in der im Laugenbehälter befindlichen Lauge. Daher ist auf der Ordinate der Druck p aufgetragen und auf der Abszisse die Zeit t. Der Druck p0 entspricht dem Niveau der im Laugenbehälter eingefüllten Lauge.The diagram of Fig. 1 shows within short periods of each drum rotation with washing speed at different laundry items different types of mechanical effects ME on the laundry, measured on the basis of the pressure conditions in the liquor in the tub. Therefore, the pressure p is plotted on the ordinate and the time t on the abscissa. The pressure p0 corresponds to the level of the liquor filled in the tub.

Im Abschnitt I eines Behandlungsprozesses sind die typischen Druckstöße in der Lauge während einer Trommelumdrehung aufgezeichnet, die von einem bestimmten Wäscheposten stammen. Während einer Trommelumdrehung sind drei Druckstöße zu verzeichnen, wenn die Wäschetrommel drei Mitnehmer hat, von denen Wäscheteile während der Trommeldrehung herabfallen, nachdem sie vom Boden bis zu einem hohen Punkt in der Wäschetrommel angehoben worden sind. Hier handelt es sich um einen Wäscheposten von einfachem Baumwollgewebe mit großen Wäscheteilen und einer maximalen Beladungsmenge von beispielsweise 5 kg Trockenwäsche. Wenn die Wäschetrommel gut gefüllt ist, fallen einzelne Wäscheteile nicht mehr aus großer Höhe vollständig bis zum Boden der Trommel zurück, so dass der mechanische Eintrag in die Wäsche begrenzt ist.Section I of a treatment process records the typical pressure surges in the liquor during a drum revolution, coming from a particular batch of laundry. During a drum revolution, there are three pressure surges when the laundry drum has three followers, portions of which tumble down during drum rotation after being lifted from the floor to a high point in the laundry drum. This is a laundry of plain cotton fabric with large items of laundry and a maximum load of, for example, 5 kg of dry laundry. If the laundry drum is well filled, individual laundry items no longer fall from a great height completely back to the bottom of the drum, so that the mechanical entry is limited in the laundry.

Der Abschnitt II zeigt demgegenüber heftigere Druckstöße in derselben Wäschetrommel, was beispielsweise auf einen Wäscheposten aus bauschigem Baumwollgewebe, z. B. aus Frottier, mit höherem Saugvermögen als das einfache Baumwollgewebe und mit mittelgroßen Wäscheteilen und minderer Beladungsmenge hinweist, z. B. 3 kg Trockenwäsche. Für einen solchen Wäscheposten ist der im Abschnitt B gezeigte Druckverlauf typisch; sein Mechanikeintrag ist entsprechend groß gegen den Druckverlauf im Abschnitt I, wie der Vergleich der Amplituden AI und AII derselben Zahl von Druckstößen verdeutlicht.In contrast, Section II shows more violent pressure surges in the same laundry drum, which, for example, to a laundry of bulky cotton fabric, z. B. from terry, with higher absorbency than the simple cotton fabric and medium-sized laundry parts and lower loading amount indicates, for. B. 3 kg dry laundry. For such a laundry item, the pressure profile shown in section B is typical; his mechanics entry is correspondingly large against the pressure curve in section I, as the comparison of the amplitudes AI and AII illustrates the same number of pressure surges.

Entsprechend typisch ist ein Druckverlauf gemäß Abschnitt III für einen Wäscheposten, der aus vielen kleinen Teilen einfachen Baumwollgewebes in einer ebenfalls minderen Menge von beispielsweise 3 kg besteht. Bei einem solchen Wäscheposten fallen bei jeder Anhebung durch einen der drei Mitnehmer mehrere Wäscheteile von diesem Mitnehmer herab, die jeweils einzelnen Druckstöße verursachen. Auch hier ist der mechanische Eintrag insgesamt größer als in einem Wäscheposten gemäß Abschnitt I. Denn, obwohl die Amplitude AIII kleiner ist als die Amplitude AI im Abschnitt I, ist doch die Zahl der Druckstöße im Abschnitt III erheblich größer.Accordingly typical is a pressure curve according to Section III for a laundry item, which consists of many small parts of simple cotton fabric in a likewise inferior amount of, for example, 3 kg. In such a laundry fall fall at each increase by one of the three drivers several laundry parts of this driver, each causing individual pressure surges. Again, the mechanical entry is greater overall than in a laundry article according to Section I. Because, although the amplitude AIII is smaller than the amplitude AI in Section I, but the number of pressure surges in Section III is considerably larger.

Die drei Beispiele betreffen Prozesszusammenstellungen für die Programme der drei Wäschearten
Baumwolle mit großen Wäscheteilen, 5 kg Trockenwäsche
Frottiertücher mit mittelgroßen Wäscheteilen,3 kg Trockenwäsche und
Baumwolle mit kleinen Wäscheteilen, 3 kg Trockenwäsche.The three examples concern process combinations for the programs of the three types of laundry
Cotton with large laundry parts, 5 kg dry laundry
Terry towels with medium sized laundry parts, 3 kg dry linen and
Cotton with small laundry parts, 3 kg dry laundry.

Jedes dieser drei Programme kennt einen typischen Druckverlauf während der Trommeldrehung. Ist nun ein solches Programm gewählt, dann wird der zugehörige Druckverlauf erwartet. Weicht allerdings der Druckverlauf davon in der Weise ab, dass der Mechanikeintrag größer ist als beim typischen Druckverlauf, dann kann der entsprechende Behandlungsabschnitt kürzer sein als vorgesehen.Each of these three programs has a typical pressure curve during drum rotation. Now, if such a program is selected, then the associated pressure profile is expected. If, however, the pressure profile deviates therefrom in such a way that the mechanical input is greater than during the typical pressure curve, then the corresponding treatment section may be shorter than intended.

Diesen Zusammenhang zeigt das Diagramm in Fig. 2. Ist das auf der Ordinate aufgetragene Verhältnis MEakt/MEtyp des aktuellen Mechanikeintrags MEakt zum typischen Mechanikeintrag MEtyp des gewählten Programms gleich 1, dann wird der zugeordnete Programmabschnitt bis zum Zeitpunkt T1 eingehalten. Dieser Programmabschnitt kann auf bis auf den Zeitpunkt T1,6 verkürzt werden, wenn der aktuelle Mechanikeintrag MEakt um das 1,6-fache über dem typischen Mechanikeintrag MEtyp liegt, ohne die Waschwirkung negativ zu beeinflussen.This relationship is shown in the diagram in Fig. 2 , If the ratio MEakt / MEtyp of the current mechanical entry MEakt, which is plotted on the ordinate, is equal to 1 for the typical mechanical entry MEtyp of the selected program, then the assigned program section is maintained until the time T1. This program section can be shortened to the point in time T1,6, if the current mechanical input MEact is 1.6 times higher than the typical mechanical entry MEtyp without negatively influencing the washing effect.

Zur Durchführung des erfindungsgemäßen Verfahrens bedarf es keiner materiellen Änderung an der betreffenden Waschmaschine. Vielmehr kann eine Waschmaschine gemäß Fig. 3 in notorischer Weise ausgestattet sein. Die Darstellung des erfindungsgemäßen Verfahrens ist lediglich eine Maßnahme, die an der Software des Steuergerätes zu treffen ist.To carry out the method according to the invention, there is no need for a material change to the washing machine in question. Rather, a washing machine according to Fig. 3 be equipped in a notorious way. The representation of the method according to the invention is merely a measure that has to be taken on the software of the control unit.

Die Waschmaschine weist eine in einem Laugenbehälter 2 wenigstens annähernd horizontal gelagerte Wäschetrommel 1 auf, die von einer Riemenscheibe 3, einem Riemen 4 und einem Elektromotor 5 angetrieben wird. Am Boden des Laugenbehälters 2, der über eine Einfüllleitung 6 mit Lauge 7 - grau schattiert - gefüllt ist, kann die Lauge über einen Abfluss 8, eine Laugenpumpe 9 und eine Abpumpleitung 10 ins Freie entlassen werden. Aufgrund der Drehung der Wäschetrommel 1 in Richtung des Pfeils 11 wird die Wäsche 12 von den Mitnehmern 1.1 bis 1.3 erfasst und hoch gehoben. Sobald ein Mitnehmer die Wäsche 12 wie der Mitnehmer 1.2 hoch gehoben hat, fällt sie aus dieser angehobenen Position wieder zum Boden der Wäschetrommel 1 hinab, wo sie gestaucht wird. Dadurch wirkt auf die Wäsche eine mechanische Arbeit ein, die zum Erfolg der Waschwirkung beiträgt. Der Aufschlag der Wäsche auf die am Boden befindliche Lauge bewirkt dort Druckschläge, die vom Messsystem wahrgenommen werden.The washing machine has a washing drum 1 mounted in a tub 2 at least approximately horizontally, which is driven by a pulley 3, a belt 4 and an electric motor 5. At the bottom of the tub 2, which is filled via a filling line 6 with liquor 7 - shaded gray - the liquor can be discharged via a drain 8, a drain pump 9 and a pumping line 10 into the open. Due to the rotation of the laundry drum 1 in the direction of the arrow 11, the laundry 12 is detected by the drivers 1.1 to 1.3 and lifted high. Once a driver has lifted the laundry 12 as the driver 1.2 high, it falls from this raised position back down to the bottom of the laundry drum 1, where it is compressed. As a result, a mechanical work on the laundry, which contributes to the success of the washing effect. The impact of the laundry on the bottom of the liquor causes there pressure shocks, which are detected by the measuring system.

Am Abfluss 8 ist nämlich eine Messleitung 13 angeschlossen, die in ein Druckgeberrohr 14 mündet. Über eine Druckleitung 15 ist das Druckgeberrohr 14 an eine Druckmessdose 16 angeschlossen, die geeignete Druckmesssignale über eine Signalleitung18 an ein Steuergerät 17 leitet. Aufgrund der Anpassung seiner Software an das erfindungsgemäße Verfahren ist das Steuergerät 17 in der Lage, die Länge eines Programmabschnitts gemäß Fig. 2 in Abhängigkeit vom aktuellen Mechanikeintrag zu verkürzen.At the outlet 8, namely, a measuring line 13 is connected, which opens into a pressure transducer tube 14. Via a pressure line 15, the pressure transducer tube 14 is connected to a pressure cell 16 which directs suitable pressure measuring signals via a signal line 18 to a control unit 17. Due to the adaptation of its software to the method according to the invention, the control unit 17 is capable of the length of a program section according to Fig. 2 depending on the current mechanics entry.

Claims (3)

Verfahren zum Steuern der Einwirkungszeit für die Faktoren Temperatur, Waschmechanik und Waschmittelchemie bei einem Nassverfahren zum Behandeln von Wäsche in einer programmgesteuerten Haushaltwaschmaschine, in dem das Volumen der zu behandelnden Wäsche (12) und deren Art und Saugvermögen bestimmt werden und die Wäsche im Innenraum einer um eine wenigstens annähernd horizontale Achse innerhalb eines Laugenbehälters (2), in dessen Bodennähe der Druck der Lauge (7) gemessen wird, sich drehenden Wäschetrommel (1) streckenweise hochgehoben wird und wieder zum tiefsten Punkt der Wäschetrommel (1) zurückfällt, dadurch gekennzeichnet, dass der zeitliche Verlauf der Druckmesswerte beim Zurückfallen der Wäsche mit einem typischen Verlauf für das eingestellte Behandlungsprogramm verglichen wird, und die Abweichungen vom typischen Verlauf dasjenige Maß bestimmen, auf das die Dauer der Einwirkungszeit in einer umgekehrt zur mechanischen Wirkung der Druckstöße beim Zurückfallen der Wäsche sich verhaltenden Weise eingestellt wird.A method for controlling the exposure time for the factors temperature, washing mechanics and detergent chemistry in a wet process for treating laundry in a program-controlled domestic washing machine, in which the volume of the laundry to be treated (12) and their nature and absorbency are determined and the laundry in the interior of a an at least approximately horizontal axis within a tub (2), in the bottom near the pressure of the liquor (7) is measured, rotating laundry drum (1) is lifted in sections and back to the lowest point of the laundry drum (1), characterized in that the time course of the pressure readings when falling back of the laundry with a typical course for the set treatment program is compared, and determine the deviations from the typical course of the extent to which the duration of the exposure time in a reverse to the mechanical effect of the pressure surges when falling back d he laundry is set behaving manner. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Druckstöße gegenüber dem Normalmaß verstärkt werden und als Folge davon die Einwirkungszeit gegenüber einem notorischen Normalmaß verkürzt wird.A method according to claim 1, characterized in that the pressure surges are amplified compared to the normal measure and as a result of which the exposure time is shortened compared to a notorious standard. Haushaltwaschmaschine mit einem Laugenbehälter (2), in dessen Bodennähe ein Druckmessgeber (13 bis 16) angeschlossen ist, und einer darin um eine wenigstens annähernd horizontal stehende Achse drehbaren Wäschetrommel (1) mit Einrichtungen (1.1 bis 1.3) zum Anheben der in ihr zu behandelnden Wäsche (12) während des Antriebs der Trommel (1) von einem durch ein Steuergerät (17) gesteuerten Trommelantriebsmotors (5), und zum Durchführen eines Verfahrens zum Steuern der Einwirkungszeit für die Faktoren Temperatur, Waschmechanik und Waschmittelchemie bei einem Nassverfahren zum Behandeln von Wäsche in der Waschmaschine, in dem das Volumen der zu behandelnden Wäsche (12) und deren Art und Saugvermögen bestimmt werden, die Wäsche im Innenraum der sich drehenden Wäschetrommel (1) streckenweise hochgehoben wird und wieder zum tiefsten Punkt der Wäschetrommel (1) zurückfällt, und in Bodennähe des Laugenbehälters (2) der Druck der Lauge (7) gemessen wird, dadurch gekennzeichnet, dass der Druckmessgeber (13 bis 16) über eine Signalleitung (18) mit dem Steuergerät (17) verbunden ist, dass das Steuergerät (17) einen Speicher für Druckmesswerte und eine Vergleichseinrichtung enthält, durch die der zeitliche Verlauf der aktuellerweise gemessenen Druckmesswerte mit einem gespeicherten Verlauf der Druckmesswerte verglichen werden kann, und dass das Steuergerät (17) eingerichtet ist, um die Einwirkungszeit in Abhängigkeit von Verlaufs-Differenzen der Druckmesswerte zu verändern.Household washing machine with a tub (2), in the bottom near a pressure transducer (13 to 16) is connected, and therein about an at least approximately horizontally stationary axis rotatable laundry drum (1) with means (1.1 to 1.3) for lifting in her to be treated Laundry (12) during the drive of the drum (1) from a drum drive motor (5) controlled by a controller (17), and for performing a method of controlling the exposure time for the factors temperature, washing mechanics and detergent chemistry in a wet process for treating laundry in the washing machine, in which the volume of the laundry to be treated (12) and their type and speed are determined, the laundry in the interior of the rotating laundry drum (1) is lifted in sections and back to the lowest point of the laundry drum (1) falls back, and near the bottom of the tub (2) the pressure of the liquor (7) is measured, characterized that the pressure transducer (13 to 16) via a signal line (18) is connected to the control unit (17), that the control unit (17) contains a memory for pressure measurements and a comparison means by which the time course of the currently measured pressure readings can be compared with a stored history of pressure readings, and in that the control unit (17) is set up in order to change the action time as a function of the course differences of the pressure measured values.
EP09176814A 2008-12-18 2009-11-24 Method for controlling a household washing machine Not-in-force EP2199449B1 (en)

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CN103290650A (en) * 2012-02-24 2013-09-11 博西华电器（江苏）有限公司 Control method of washing machine
CN112746439A (en) * 2019-10-30 2021-05-04 Bsh家用电器有限公司 Laundry care appliance with control device

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Publication number Priority date Publication date Assignee Title
DE102010028141B4 (en) * 2009-05-08 2018-11-15 BSH Hausgeräte GmbH Process for treating laundry in a drum washing machine under improved scooping conditions
DE102021212649A1 (en) 2021-11-10 2023-05-11 BSH Hausgeräte GmbH METHOD OF DETERMINING A MECHANICAL ACTION ON LAUNDRY ITEMS AND LAUNDRY CARE MACHINE FOR PERFORMING ITS PERFORMANCE

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DE3027584A1 (en) 1980-07-21 1982-02-11 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart WASHING MACHINE
DE19623958A1 (en) 1996-06-15 1997-12-18 Aeg Hausgeraete Gmbh Program controlled drum washing machine
DE69712380T2 (en) 1996-02-05 2003-01-09 Wrap Spa Method for determining the amount of laundry and / or the type of laundry in a washing machine
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DE2951926A1 (en) 1979-12-21 1981-07-02 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart METHOD FOR WASHING LAUNDRY AND AUTOMATICALLY WORKING DRUM WASHING MACHINE
DE3027584A1 (en) 1980-07-21 1982-02-11 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart WASHING MACHINE
DE69712380T2 (en) 1996-02-05 2003-01-09 Wrap Spa Method for determining the amount of laundry and / or the type of laundry in a washing machine
DE19623958A1 (en) 1996-06-15 1997-12-18 Aeg Hausgeraete Gmbh Program controlled drum washing machine
DE102006034190A1 (en) 2006-07-24 2008-01-31 BSH Bosch und Siemens Hausgeräte GmbH A method for determining a loading amount of a laundry treating appliance and a laundry treating appliance suitable therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103290650A (en) * 2012-02-24 2013-09-11 博西华电器（江苏）有限公司 Control method of washing machine
CN112746439A (en) * 2019-10-30 2021-05-04 Bsh家用电器有限公司 Laundry care appliance with control device
CN112746439B (en) * 2019-10-30 2024-02-02 Bsh家用电器有限公司 Washware care implement with control device

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DE102008054931A1 (en) 2010-07-15
EP2199449B1 (en) 2011-12-28
EP2199449A3 (en) 2010-09-01
ATE539189T1 (en) 2012-01-15
DE102008054931B4 (en) 2012-03-08

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