EP1540065B1 - Method for operating a programmable washing machine - Google Patents

Method for operating a programmable washing machine Download PDF

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Publication number
EP1540065B1
EP1540065B1 EP03794869A EP03794869A EP1540065B1 EP 1540065 B1 EP1540065 B1 EP 1540065B1 EP 03794869 A EP03794869 A EP 03794869A EP 03794869 A EP03794869 A EP 03794869A EP 1540065 B1 EP1540065 B1 EP 1540065B1
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EP
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Prior art keywords
laundry
user
drum
program
crease
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EP03794869A
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German (de)
French (fr)
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EP1540065A1 (en
Inventor
Ingo Schulze
Martina Wöbkemeier
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005Methods for washing, rinsing or spin-drying
    • D06F35/007Methods for washing, rinsing or spin-drying for spin-drying only
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2101/00User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02Characteristics of laundry or load
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46Drum speed; Actuation of motors, e.g. starting or interrupting
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58Indications or alarms to the control system or to the user

Definitions

  • This example assumes a washing machine with an intelligent expert system and a display on which the important information is made visible to the user, and with which a dialog operation with the user is possible.
  • the program sequence is shown schematically in a speed-time diagram, with specific details being omitted since these are of no significance for the understanding of the invention.
  • the washing machine is during the operations "washing” and "rinsing" beginning at time t ws reversing at low speeds, ie operated with alternating direction of rotation.
  • the flanks of the reversing cycles are shown as vertical in the diagram, in reality the drum is accelerated slowly, ie, energy-saving to the setpoint speed. The same applies to the reversing cycles of the anti-crease operation.

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

Abstract

Operation of the subsequent anti-creasing process can be manipulated by user

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer programmierbaren Waschmaschine mit einer innerhalb eines Laugenbehälters drehbar angeordneten Wäschetrommel, die programmabhängig mit unterschiedlichen Drehzahlprofilen in beiden Drehrichtungen bewegbar ist und mit einer Echtzeituhr, über die der Nutzer Beginn oder Ende des Waschgangs selbst bestimmen kann.The invention relates to a method for operating a programmable washing machine with a washing drum rotatably arranged within a tub, which is program-dependent with different speed profiles in both directions and with a real-time clock over which the user can determine the beginning or end of the wash itself.

Von einer Reihe von Waschmaschinenherstellern werden Geräte angeboten, bei denen eine Knitterschutz-Funktion im Programm als ein dem Endschleudern nachgeordneter Abschnitt fest installiert ist. Bei diesen bekannten Geräten ist der Knitterschutz-Programmabschnitt bzgl. Dauer und Ablauf für alle Wäschearten und alle Beladungsmengen gleich und fest vorgegeben. Der Nutzer der Waschmaschine hat nur die Möglichkeit, den Knitterschutz auszuschalten. Weitere Eingriffe sind nicht vorgesehen.A number of washing machine manufacturers offer equipment in which a crease protection function is permanently installed in the program as a final spooling section. In these known devices, the crease-protection program section with respect to duration and sequence for all types of laundry and all load quantities is the same and fixed. The user of the washing machine has only the opportunity to turn off the crease protection. Further interventions are not planned.

Bei Waschmaschinen kommt es regelmäßig dazu, dass sich beim Schleudern mit den heute üblichen hohen Drehzahlen an der Trommelinnenwand ein Wäschering ausbildet, der sich auch nach dem Anhalten der Trommel oft nicht ablöst. Dies führt zu verstärkter Knitterbildung und erschwert das Entladen der Trommel. Sehr nachteilig wirkt sich der Wäschering aus, wenn in dem Waschautomaten ein Trockner integriert ist. Ein nicht abgelöster Wäschering behindert ein gleichmäßiges und schnelles Trocknen des Waschgutes. Dem zu begegnen, ist bei vielen Waschmaschinen ein Knitterschutz-Arbeitsgang dem Schleudern nachgeschaltet. Dabei wird die Trommel über eine kurze Zeitspanne mit einer Drehzahl unterhalb der Anlegedrehzahl in mehreren Intervallen entgegen der beim Schleudern ausgeführten Drehrichtung bewegt. Dies reicht in vielen Fällen aus, die Wäsche von der Trommel abzulösen und zu entwirren.In washing machines, it usually happens that when spinning with the usual high speeds today on the drum inner wall forms a laundry ring, which often does not peel off even after stopping the drum. This leads to increased creasing and makes it difficult to unload the drum. The washing ring has a very disadvantageous effect if a dryer is integrated in the washing machine. An undone laundry ring impedes a uniform and fast drying of the laundry. To counter this, in many washing machines, a crease-protection operation is followed by centrifuging. In this case, the drum is moved over a short period of time at a speed below the application speed in several intervals against the direction of rotation executed during spin. This is sufficient in many cases, to detach the laundry from the drum and untangle.

Bekannt ist eine solche Drehrichtungsumkehr zum Entwirren des Waschgutes in der Trommel aus der DE 41 15 776 A1 als Zwischenschritt beim Spülen und Schleudern, wobei hier nicht der Knitterschutz im Vordergrund steht, sondern das Umverteilen des Waschgutes in der Trommel zur besseren Aus- bzw. Reinspülung der einzelnen Wäschestücke. In der DE 198 31 617 A1 wird ein Verfahren zur Bestimmung der Wäschemenge in einer Trommel beschrieben, bei dem zur Fehlerkorrektur mehrere Wäscheentwirrungsschritte vorgesehen sind.Known is such a reversal of direction to untangle the laundry in the drum of the DE 41 15 776 A1 as an intermediate step when rinsing and spinning, in which case not the crease protection is in the foreground, but the redistribution of the laundry in the drum for better flushing or pure rinsing of the individual laundry items. In the DE 198 31 617 A1 A method for determining the amount of laundry in a drum is described in which several laundry entanglement steps are provided for error correction.

Die vorbeschriebenen Verfahren mit den fest vorgegebenen Parametern für Drehzahl, Beschleunigung und Bremsgeschwindigkeit sind in Bezug auf einen wirksamen Knitterschutz nicht optimal. Mit den bekannten Verfahren bzw. Verfahrensschritten kann die Knitterschutzfunktion nicht an die unterschiedlichen Bedingungen wie Beladungsmenge und textile Eigenschaften des Waschgutes angepasst werden. Die Verfahren bieten auch keine ausreichende Sicherheit, dass sich der Wäschering wirklich ablöst. Dies ist insbesondere problematisch bei Drehzahlen über 1400 min-1, bei denen der Wäschering an der Trommelinnenwand fest anhaftet und in sich relativ stabil ist.The above-described methods with the fixed parameters for speed, acceleration and braking speed are not optimal in terms of effective crease protection. With the known methods and method steps, the anti-crease function can not be adapted to the different conditions such as load and textile properties of the laundry. The procedures also do not provide sufficient assurance that the laundry ring really peels off. This is particularly problematic at speeds above 1400 min -1 , where the wash ring adheres firmly to the inner wall of the drum and is relatively stable in itself.

In der DE 199 47 307 C1 wird ein Verfahren beschrieben, bei dem nach dem Endschleudern ein Programmabschnitt folgt, in dem das Ablösen eines Wäscheringes von der Trommelinnenwand messtechnisch kontrolliert wird. Dazu werden die mechanischen Erschütterungen des Laugenbehälters durch fallendes Waschgut erfasst. Dies erfolgt durch Auswertung des dynamischen Signalanteils eines Lage- oder Kraftsensors oder durch Auswertung der Signale eines Beschleunigungssensors. Um Fehldeutungen der Messdaten bei sehr geringen Wäschemengen zu vermeiden, wird der Gewichtswert, der während des Waschprozesses ermittelt oder vom Nutzer eingegeben wurde, bei der internen Auswertung durch die Mikroprozessor-Steuerung mit einbezogen. Nach Erkennen eines Wäscheringes wird versucht, durch Ansteuerung des Trommelantriebes mit kurzen und starken Beschleunigungs- bzw. Bremsimpulsen den Wäschering abzulösen. Der Erfolg dieser Maßnahme wird anschließend durch erneute Auswertung des Sensorsignals überprüft.In the DE 199 47 307 C1 a method is described in which after the final spin follows a program section in which the detachment of a laundry ring is controlled by the drum inner wall by measurement. For this purpose, the mechanical vibrations of the tub are detected by falling laundry. This is done by evaluating the dynamic signal component of a position or force sensor or by evaluating the signals of an acceleration sensor. To avoid misinterpretations of the measured data with very small quantities of laundry, the weight value, which was determined during the washing process or entered by the user, is included in the internal evaluation by the microprocessor control. After detecting a Wäscheringes is trying to replace the laundry ring by controlling the drum drive with short and strong acceleration or braking pulses. The success of this measure is then checked by re-evaluation of the sensor signal.

Das beschriebene Verfahren bietet ebenfalls keine Möglichkeit, entsprechend den Nutzerwünschen und -erfahrungen in das automatisch ablaufende Programm einzugreifen und individuell zu manipulieren. Der Erfolg des beschriebenen Verfahrens in Bezug auf die Ablösung eines an der Trommelinnenwand anhaftenden Wäscheringes hängt allein von der Empfindlichkeit und Genauigkeit der Sensorik ab, was bei sehr geringen Wäschemengen oder sehr leichter Wäsche problematisch ist.The described method likewise offers no possibility to intervene in the automatically running program according to the user wishes and experiences and to manipulate it individually. The success of the described method in relation to the detachment of an adhering to the drum inner wall laundry ring depends solely on the sensitivity and accuracy of the sensor, which is problematic for very small amounts of laundry or very light laundry.

Ferner offenbart DE 25 59 044 A ein Verfahren, bei dem unter anderem die Dauer des Abschnitts des Schleudervorgangs, in dem sich die Wäschestücke von der Trommelwand nach dem Fertigschleudern wieder lösen, vom Benutzer bestimmt werden kann.Further disclosed DE 25 59 044 A a method in which, among other things, the duration of the section of the spinning process in which the laundry items detach from the drum wall after spin-drying can be determined by the user.

Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes Verfahren für das Auflockern des Waschgutes nach dem Endschleudern anzugeben, bei dem der Nutzer seinen Wünschen und Erfahrungen gemäß das Knitterschutz-Programm in weiten Grenzen selber bestimmen kann. Es ist weiterhin Aufgabe der Erfindung, den Nutzer bei der Auswahl der einstellbaren und von ihm wählbaren Parametern für den Ablauf des Knitterschutz-Programms weitestmöglich zu unterstützen und das Detektieren eines Wäscheringes zu verbessern.The invention has for its object to provide an improved process for the loosening of the laundry after the final spin, in which the user his wishes and experience according to the anti-crease program within wide limits itself can determine. It is a further object of the invention to assist the user as far as possible in the selection of the adjustable and selectable by him parameters for the course of the anti-crease program and to improve the detection of a laundry ring.

Gemäß der Erfindung wird die Aufgabe durch die im Hauptanspruch aufgeführten Merkmale gelöst. Zusätzliche vorteilhafte Ausgestaltungen des erfinderischen Verfahrens sind in den Unteransprüchen angegeben.According to the invention the object is achieved by the features listed in the main claim. Additional advantageous embodiments of the inventive method are specified in the subclaims.

Die Erfindung stellt eine Erweiterung und weitere Verbesserung bekannter Waschverfahren dar im Hinblick auf ein schonendes Behandeln der Wäsche, insbesondere in bezug auf ein optimales Auflockern der Textilien nach dem Schleudern. Dabei wird dem Nutzer die Möglichkeit geboten, auf das Programm aktiv einzuwirken. Erfindungswesentlich ist, dass das Knitterschutz-Programm nach Maßgabe der Erfindung bzgl. seiner Start- und Endezeit, der Laufdauer und des Ablaufs frei programmiert werden kann. Der Nutzer kann den Knitterschutz entsprechend den gegebenen individuellen Bedingungen, sowie nach seinen persönlichen Wünschen und Erfahrungen eigenständig gestalten. Dabei wird in Ausgestaltung der Erfindung der Nutzer vom Programm unterstützt durch die interne Ermittlung von Vorgabewerten für die manipulierbaren Parameter und durch die Kontrolle des Ablösens von Wäscheringen, die sich beim Schleudern an der Trommelinnenwand bilden.The invention is an extension and further improvement of known washing methods with regard to a gentle treatment of the laundry, in particular with regard to an optimal loosening of the textiles after spinning. The user is offered the opportunity to actively influence the program. It is essential to the invention that the anti-crease program according to the invention can be freely programmed with regard to its start and end time, the running time and the sequence. The user can independently design the anti-crease protection according to the given individual conditions as well as according to his personal wishes and experiences. In this case, in the embodiment of the invention, the user is supported by the program by the internal determination of default values for the manipulable parameters and by the control of the detachment of Wäscheringen that form when spinning on the drum inner wall.

Die Erfindung wird nachstehend an einem in der Zeichnung dargestellten Programmbeispiel ausführlicher erläutert.The invention will be explained in more detail below with reference to a program example shown in the drawing.

Bei diesem Beispiel wird ausgegangen von einer Waschmaschine mit einem intelligenten Expertensystem und einer Displayanzeige, auf der die wichtigen Informationen dem Benutzer sichtbar gemacht werden, und mit der ein Dialogbetrieb mit dem Nutzer möglich ist. Der Programmablauf ist schematisch in einem Drehzahl-Zeit-Diagramm dargestellt, wobei auf spezifische Einzelheiten verzichtet wurde, da diese für das Verständnis der Erfindung ohne Bedeutung sind. Die Waschmaschine wird während der Arbeitsgänge "Waschen" und "Spülen" beginnend zum Zeitpunkt tws mit niedrigen Drehzahlen reversierend, d.h. mit wechselnder Drehrichtung betrieben. Aus Gründen der Vereinfachung sind in dem Diagramm die Flanken der Reversierzyklen als Senkrechte dargestellt, in der Realität wird die Trommel langsam, d.h. energiesparend auf die Solldrehzahl beschleunigt. Das Gleiche gilt auch für die Reversierzyklen des Knitterschutz-Arbeitsganges.This example assumes a washing machine with an intelligent expert system and a display on which the important information is made visible to the user, and with which a dialog operation with the user is possible. The program sequence is shown schematically in a speed-time diagram, with specific details being omitted since these are of no significance for the understanding of the invention. The washing machine is during the operations "washing" and "rinsing" beginning at time t ws reversing at low speeds, ie operated with alternating direction of rotation. For reasons of simplification, the flanks of the reversing cycles are shown as vertical in the diagram, in reality the drum is accelerated slowly, ie, energy-saving to the setpoint speed. The same applies to the reversing cycles of the anti-crease operation.

Der Waschphase nachfolgend sind, erkennbar an den hohen Drehzahlen, ein Spülabschnitt und zwei Schleuder-Arbeitsgänge mit einem zwischengeschalteten Auflockerungs-Arbeitsgang dargestellt, bei dem die Wäschetrommel mit gegenüber dem Schleudern verringerter Drehzahl aber entgegengesetzter Drehrichtung bewegt wird. Nach dem Endschleudern, das mit der maximalen Drehzahl ausgeführt wird, ist zum Zeitpunkt twe das eigentliche Waschprogramm beendet.The washing phase below, recognizable by the high speeds, a rinsing section and two spin operations are shown with an intermediate loosening operation, in which the laundry drum is moved with respect to the spinning reduced speed but opposite direction of rotation. After the final spin, which is carried out at the maximum speed, the actual washing program is ended at time t we .

Der anschließende Knitterschutz-Arbeitsgang soll die Wäsche in der Trommel auflockern und diesen Zustand über die Zeit beibehalten, um zu verhindern, dass die in der Trommel bereits aufgelockerte Wäsche durch zu langes Liegen in unerwünschter Weise wieder zusammen gedrückt wird, sich Falten ausbilden und das Herausnehmen der einzelnen Wäschestücke erschwert wird. Vom kurzen Abschnitt zu Beginn des Knitterschutz-Arbeitsganges abgesehen, ist dieser dem Schleudern nachgeordnete Programmabschnitt bestimmt durch ein Reversieren der Trommel mit konstanter Drehzahl, sowie gleichbleibender Dauer von Dreh- und Ruhephasen bis zum vorbestimmten Ende te. Die Parameter für diesen Abschnitt sind frei auswählbar, dabei wird der Nutzer vom System der Waschmaschine in der Weise unterstützt, dass der Nutzer über das Display geführt wird. Nachfolgend wird die Programmierung des Knitterschutz-Arbeitsganges beschrieben.The subsequent anti-crease operation is to loosen up the laundry in the drum and maintain this state over time to prevent the laundry already loosened in the drum is undesirably pushed back together by too long lying, form wrinkles and the removal the individual laundry is difficult. Apart from the short section at the beginning of the crease-protection operation, this spin-downstream program section is determined by reversing the drum at a constant speed, as well as a constant duration of rotation and resting phases to the predetermined end t e . The parameters for this section are freely selectable, whereby the user is supported by the system of the washing machine in such a way that the user is led over the display. The following describes the programming of the anti-crease operation.

Nach der üblichen Programmauswahl für den Waschprozess und der Eingabe zusätzlicher Parameter zur Manipulation des Waschprogramms wird vom System über das Display abgefragt, ob der Knitterschutz erwünscht ist. Nach der Bestätigung durch den Nutzer wird auf dem Display eine Zeitdauer angezeigt, die textilartabhängig von dem intelligenten Auswertesystem aus einem Vorrat von im Speicher fest hinterlegten Vorgabewerten ermittelt wird und die bestimmt, wie lange der Knitterschutz-Arbeitsgang nach dem Endschleudern dauern soll. Der Nutzer kann diese vorgegebene Zeit durch entsprechende Eingaben verlängern oder verkürzen. Alternativ zu der Laufzeit des Knitterschutzes kann der Nutzer die Funktion "Programmende-Zeit" auswählen und darüber die Uhrzeit bestimmen, zu der das Programm abschaltet. Die Dauer des Knitterschutz-Arbeitsganges ergibt sich dann automatisch aus der Zeitdifferenz zwischen dem Zeitpunkt des Endschleuderns twe und der gewählten Endezeit te. Eine fehlerhafte Eingabe der Endezeit durch den Nutzer, etwa in der Weise, dass die gewählte Endezeit vor dem Ende des Endschleuderns liegt, führt nicht zum Programmabbruch, sondern bewirkt lediglich, dass dem Parameter "Programmdauer" der Wert "Null" zugeordnet wird, der Knitterschutz also gar nicht aktiviert wird. Nachfolgend werden dem Nutzer Werte im Display angezeigt für die Parameter "Drehzahl", "Drehdauer" und "Zeitintervall", die der Nutzer bestätigten oder nach oben bzw. nach unten korrigieren kann.After the usual program selection for the washing process and the input of additional parameters for the manipulation of the washing program is queried by the system via the display, whether the crease protection is desired. After confirmation by the user, a period of time is displayed which, depending on the type of textile, is determined by the intelligent evaluation system from a set of default values stored in the memory and which determines how long the anti-crease operation should last after the final spin. The user can extend or shorten this given time by corresponding entries. As an alternative to the duration of anti-crease protection, the user can select the function "End of program time" and determine the time at which the program switches off. The duration of the anti-crease operation then automatically results from the time difference between the time of the final spin t we and the selected end time t e . An erroneous input of the end time by the user, such that the selected end time before the end of the final spin, does not lead to the program abort, but only causes the parameter "program duration" is assigned the value "zero", the crease protection So not activated. Subsequently, the user will see values in the display for the Parameters "Speed", "Rotation time" and "Time interval", which the user can confirm or correct upwards or downwards.

Die vom Nutzer eingestellten Werte für den Knitterschutz-Arbeitsgang werden steuerungsintern mit dem ausgewählten Wäschepflegeprogramm, einschließlich der Zusatzparameter auf Verträglichkeit überprüft. Wählt der Nutzer bspw. für empfindliche Textilarten eine zu hohe Drehzahl, wird dies im Display angezeigt, bspw. durch wiederholtes Aufblinken des Zahlenwertes.The values set by the user for the anti-crease operation are checked within the control with the selected laundry care program, including the additional parameters for compatibility. If, for example, the user chooses too high a speed for sensitive textile types, this is indicated in the display, for example by repeated flashing of the numerical value.

Alle vom System automatisch angezeigten Vorgabewerte werden abgeleitet aus speicherhinterlegten Messdaten, die aus einer Vielzahl von Vergleichsversuchen gewonnen wurden, aus dem vom Nutzer ausgewählten Waschprogramm einschließlich der zusätzlich eingegebenen Parameter und der von einem geeigneten Sensorsystem festgestellten Beladungsmenge der Trommel. Die vom internen Auswertesystem ermittelten und auf dem Display angezeigten Werte werden unter der Prämisse bestimmt, einen wirksamen, aber auch möglichst energiesparenden Knitterschutz zu gewährleisten. Für den Fall, dass der Knitterschutz vom Nutzer gewünscht, aber durch keinerlei Eingaben spezifiziert wird, läuft das Programm nach Maßgabe der Vorgabewerte ab.All default values automatically displayed by the system are derived from stored measurement data obtained from a plurality of comparison tests, from the user selected washing program including the additionally entered parameters and the drum load determined by a suitable sensor system. The values determined by the internal evaluation system and displayed on the display are determined on the premise of ensuring effective but also energy-saving crease protection. In the event that the crease protection desired by the user, but is specified by any inputs, the program runs in accordance with the default values.

Der erste Abschnitt nach dem Schleudern, beginnend vom Zeitpunkt twe, wird vom intelligenten Expertensystem gesteuert und läuft automatisch ab. Die Dauer dieses ersten Abschnittes ist abhängig vom Erreichen einer Zielfunktion, d.h. vom Erreichen vorbestimmter Zustandsgrößen, die als Kriterium für ein Ablösen des nach dem Endschleudern an der Trommelinnenwand anhaftenden Wäscheringes und für ein lockeres, entwirrtes Waschgut gelten können. Dazu geeignet sind mechanische, akustische und optische Größen wie z.B. Drehzahlverlauf, Drehmoment, Unwucht, Aufschlaggeräusche, Reflexions- und Streulicht. Das Ablösen des Wäscheringes wird dadurch kontrolliert, dass zu Beginn des Knitterschutz-Arbeitsganges in den Reversierphasen eine oder mehrere dieser Zustandsgrößen messtechnisch aufgenommen werden und diese mit Solldaten verglichen werden, die ais Kriterium für aufgelockerte und entwirrte Wäsche ermittelt wurden. Die Sollmesswerte werden ermittelt in einem, dem eigentlichen Beginn des Waschprogramms (Zeitpunkt tws), vorgelagerten kurzen Analyseabschnitt (ta), bei dem die Trommel in zwei kurzen Abschnitten mit verschiedenen Drehzahlen bewegt wird. Die Drehzahl der ersten Phase ist gleich der für den Knitterschutz gewählten Drehzahl, in der zweiten Phase wird die Trommel mit der Anlegedrehzahl A bewegt. Die Messwerte aus dem ersten Abschnitt entsprechen dem durch den Knitterschutz angestrebten Sollzustand einer aufgelockerten, entwirrten Menge von Wäschestücken. Beim Drehen der Trommel mit Anlegedrehzahl wird der Zustand messtechnisch erfasst, der als Endzustand unbedingt vermieden werden soll. Extreme Abweichungen, verursacht durch das Beladen der Trommel mit Nasswäsche, werden steuerungsintern korrigiert. Durch diese Vorgehensweise wird die Kontrollmesseinrichtung bei jedem Waschgang neu kalibriert. Insbesondere durch die Relation zweier Messwerte werden Vergleichswerte ermittelt, mit denen Fehler beim Erkennen eines Wäscheringes, hervorgerufen durch unterschiedliche, insbesondere sehr geringe Beladungsmengen- oder -gewichte, durch textilspezifische Eigenschaften oder anderen eher zufälligen Besonderheiten des Waschgutes, weitestgehend vermieden werden können.The first section after spinning, starting from the point in time t we, is controlled by the intelligent expert system and runs automatically. The duration of this first section depends on the achievement of an objective function, ie on the achievement of predetermined state variables which can be used as a criterion for detachment of the laundry ring adhering to the drum inner wall after the final spin and for a loose, uncoiled laundry. Suitable for this are mechanical, acoustic and optical variables such as speed curve, torque, imbalance, impact noise, reflection and scattered light. The detachment of the laundry ring is controlled by the fact that one or more of these state variables are metrologically recorded at the beginning of the crease-protection operation in the reversing phases and these are compared with target data, which were determined as a criterion for loosened and unraveled laundry. The desired measured values are determined in a short analysis section (t a ) upstream of the actual start of the washing program (time t ws ), in which the drum is moved in two short sections at different speeds. The speed of the first phase is equal to the speed selected for the crease protection, in the second phase, the drum is moved with the application speed A. The measured values from the first section correspond to the target state of a loosened, unraveled desired by the crease protection Amount of laundry items. When rotating the drum at application speed, the condition is recorded by measurement, which is to be avoided as a final condition. Extreme deviations caused by loading the drum with wet scrubbing are corrected within the control. By doing so, the control gauge is recalibrated at each wash. In particular, by comparing two measured values, comparative values are determined with which errors in recognizing a washing ring, caused by different, in particular very low loading quantities or weights, by textile-specific properties or other rather random characteristics of the laundry, can be largely avoided.

Claims (7)

  1. Method of operating a programmable washing machine with a laundry drum, which is rotatably arranged within a solution container and which is movable in dependence on program with different rotational speed profiles in two directions of rotation, and with a real time clock by way of which the user can determine the start or finish of the washing process, as well as with a crease protection procedure, which is downstream of the program segments of washing and spinning, for loosening the laundry in the drum, connected with an intermediate step in which the drum drive is driven by short and strong acceleration or braking pulses so as to produce detaching of a laundry ring which has arisen during spinning and lies against the drum inner wall, and in which the successful detaching of the laundry ring is checked by means of comparative measurement data which are automatically determined by the program control, characterised in that the downstream crease protection procedure can be manipulated by the user, wherein the user is guided and assisted by means of a display in the programming of the crease protection program segment in the manner that the program presets for the user, by way of the display, values for the parameters of rotational speed, duration of rotation, duration of rest phases and total duration, which are derived as favourable mean value internally of the control from a plurality of measurement data determined in comparative tests and filed in the memory, as well as from the washing program, which is selected by the user, inclusive of the additionally input parameters and from the loading of the drum ascertained by sensor, and that these preset values can be changed in upward or downward direction by the user.
  2. Method according to claim 1, characterised in that the start time and finish time of the entire washing program inclusive of the crease protection procedure or the duration of the downstream crease protection procedure are freely selectable by the user, as well as at the rotational speed, the duration of rotation and the time intervals between the rotational phases.
  3. Method according to claim 1 or 2, characterised in that the values, which are set by the user, for the crease protection procedure are compared internally of the control with the selected laundry care program inclusive of the additional parameters and checked for compatibility and that an incompatible value is indicated in the display.
  4. Method according to claim 3, characterised in that reference is made to an incompatible value by repeated flashing of the display presentation.
  5. Method according to any one of the preceding claims, characterised in that for checking the detaching of the laundry ring from the drum inner wall mechanical, acoustic and/or optical measurement data are recorded at the beginning of the crease protection procedure in the reversing phases and these data are compared with corresponding measurement data which are obtained from a short analysis segment upstream of the washing program.
  6. Method according to claim 5, characterised in that the comparison data are recorded during rotation of the laundry drum at spreading rotational speed and at a rotational speed which was fixed by the user for the crease protection.
  7. Method according to claim 1, 2, 5 or 6, characterised in that on recognition of a laundry ring the laundry drum is temporarily moved with high acceleration and braking pulses and that on repeated registration of a laundry ring the laundry drum is, for detaching the laundry ring, moved with acceleration and braking pulses increased in steps.
EP03794869A 2002-09-09 2003-08-12 Method for operating a programmable washing machine Expired - Lifetime EP1540065B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10241682 2002-09-09
DE10241682A DE10241682B4 (en) 2002-09-09 2002-09-09 Method for operating a programmable washing machine
PCT/EP2003/008954 WO2004025012A1 (en) 2002-09-09 2003-08-12 Method for operating a programmable washing machine

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EP1540065A1 EP1540065A1 (en) 2005-06-15
EP1540065B1 true EP1540065B1 (en) 2009-11-11

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US (1) US7446500B2 (en)
EP (1) EP1540065B1 (en)
AT (1) ATE448348T1 (en)
DE (2) DE10241682B4 (en)
PL (1) PL374471A1 (en)
WO (1) WO2004025012A1 (en)

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EP1540065A1 (en) 2005-06-15
US7446500B2 (en) 2008-11-04
US20060125428A1 (en) 2006-06-15
DE10241682A1 (en) 2004-03-25
DE10241682B4 (en) 2006-01-19
PL374471A1 (en) 2005-10-31
DE50312118D1 (en) 2009-12-24
WO2004025012A1 (en) 2004-03-25
ATE448348T1 (en) 2009-11-15

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