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EP1143058B1 - Method for rinsing laundry in a washing machine - Google Patents

Method for rinsing laundry in a washing machine Download PDF

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Publication number
EP1143058B1
EP1143058B1 EP01104097A EP01104097A EP1143058B1 EP 1143058 B1 EP1143058 B1 EP 1143058B1 EP 01104097 A EP01104097 A EP 01104097A EP 01104097 A EP01104097 A EP 01104097A EP 1143058 B1 EP1143058 B1 EP 1143058B1
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EP
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Prior art keywords
rinse
temperature
washing
implementing
water
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EP01104097A
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German (de)
French (fr)
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EP1143058A3 (en
EP1143058A2 (en
Inventor
Walter Dietz
Rudolf Herden
Wilfried Schäffersmann
Dirk Sieding
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Miele und Cie KG
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Miele und Cie KG
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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
    • D06F33/38—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of rinsing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps

Definitions

  • the invention relates to a method for carrying out a washing program section for Washing clothes in a washing machine, especially in a drum washing machine, in the heated washing liquor after the completion of a washing program section used in a tub and then emptied from it, a subset cold rinse water is filled into the tub, being in the lower part of the A temperature sensor.
  • a method for carrying out a washing program section of the type mentioned is basically known in advance and can also be done by a specialist from a printed document the technology (DE 42 19 276 A1 and DE 32 06 563 C2) are essentially taken. Furthermore, DE 39 09 021 A1 shows how the composition of the laundry in Main wash cycle is determined by evaluating their suction behavior. It is also known, other parameters for determining the composition of the laundry item to be used, for example the speed behavior (DE 44 38 760 A1). Beyond that Washing machines known in which the user enters the composition. Dependent Amounts of rinse water are then calculated from the composition for several rinses or given. These are fed to the tub, the laundry in Rinsing water is moved for a set time and then emptied. In connection the bound washing liquor in drum washing machines is attached to the individual rinsing cycles driven out by rapid rotation of the drum (centrifugal force).
  • the basis for optimizing the washing result in known washing processes is the Dilution calculation. It assumes that the detergent and dirt residues in the Laundry diluted to the same extent by the amount of water added in the rinse cycles becomes like substances outside the laundry. According to the dilution calculation The rinse result is therefore the more optimal the more rinse cycles are used.
  • the invention thus presents the problem of a method for washing laundry in one To disclose washing machine of the type mentioned, which has the aforementioned disadvantages avoids and at which leveling processes between washing liquor and laundry can be taken into account in a simple manner without additional sensors.
  • the advantage achievable with the invention is that for controlling the washing process apart from the temperature sensor already present in most washing machines, no additional ones Sensor technology is needed. It is also independent of the detergent used Assessment of the rinsing effect possible.
  • the washing program section divided into at least two rinse cycles and the measurement and evaluation of the temperature profile takes place in the first rinse cycle (claim 2).
  • a relatively large temperature difference expected between laundry and washing liquor which means lower demands on the Resolution of the temperature sensor can be set. This is particularly the case if the temperature profile is measured and evaluated at the beginning of the first rinse cycle (Claim 3) and the rise in temperature of the washing liquor is still very large.
  • the temperature profile in this part can be used to calculate the further temperature profile and on this Basis advantageously the duration (claim 4) and the number (claim 5) of all rinses as well as the amount of rinse water used and the required spin speeds to be determined for intermediate spinning (compare claims 6 and 7).
  • a drawing shows the Temperature course of the wash liquor in the first wash cycle using a temperature-time diagram.
  • the washing machine has a tub in a drum in a known manner is rotatably mounted to hold laundry.
  • a heater for heating the wash liquor is arranged in the lower area of the tub.
  • the drum is driven about an engine.
  • the tub is suspended from the housing by springs and is opposed to damping these vibrations in the lower area by shock absorbers supported the case bottom.
  • a microprocessor control is provided to control the different washing programs, which are connected to various sensors and the control elements via signal lines is. It issues time and status-dependent commands to various control lines Actuators further.
  • a weight sensor under the washing machine's sensors, with which the Load amount of the drum can be determined.
  • a sensor is used in a known manner Position sensor arranged parallel to the shock absorber, with which the weight-dependent Suds container altitude is detected.
  • Other weight sensors for example Strain gauges can also be used. From the static part of the Position sensor signal is determined by the microprocessor control and the load stored in a memory.
  • a tachometer generator coupled to the motor picks up a motor speed signal for control purposes, from which the microprocessor control the control deviation of the speed in the first Reverse cycles determined and also saved.
  • an analog pressure sensor For the water level measurement there is a riser with the drain area of the tub connected, within which an analog pressure sensor is arranged as a level sensor.
  • the fresh water is fed into the tub via a line in which one of the microprocessor control solenoid valve is switched.
  • the microprocessor control determines the analog pressure sensor the pressure curve in the tub by evaluating the pressure difference and the Suction times in the suction phases during the water inlet, in which the solenoid valve is not is open. In addition, it determines the water intake quantity by adding up all Solenoid valve opening times of the respective program section.
  • a temperature sensor in the lower area of the tub allows during the Washing program section the temperature control of the washing liquor, in the washing program section the washing liquor temperature is measured and evaluated, which is described in more detail below
  • the program section "washing" is carried out and in a known manner by the Microprocessor control depending on the setting values and the measured Parameters influenced. Then the washing liquor is emptied from the tub, supported by rotating the drum at increased speed (Zwischenschleudem).
  • Rinse program section, which consists of individual rinse cycles.
  • the wash cycle one of the type of laundry and / or the amount of laundry dependent portion of cold fresh water (rinse water) added, which under Rotation of the drum rinses out the detergent residues from the laundry.
  • Rinse water and Laundry have different temperatures. Machine the cold rinse water after the main wash in contact with the warm laundry, so it will be due to a heat exchange between the washing liquor and the laundry, gradually warm the washing liquor over time. Strive to do so the washing liquor and the laundry at an equilibrium temperature. This is still from the ambient temperature dependent, since additional at lower ambient temperature External heat losses are to be expected.
  • the figure shows the course of the washing liquor temperature as a temperature-time diagram.
  • the temperature initially drops to an initial temperature T 0 due to the inflow of cold rinse water.
  • the warm laundry still containing the washing liquor then causes a temperature rise to the equilibrium temperature T G.
  • the rinsing time is a decisive factor for the rinsing value. Is the equilibrium concentration not reached by alkalis, there are more alkalis on the laundry. Corresponding The temperature of the laundry is also higher than the temperature prevailing in the liquor. you can now determine the equilibrium temperature by measuring the temperature profile of the fleet estimate and put this temperature in relation to the measured temperature. In The alkalis on the laundry with the equilibrium concentration then stand in an analogous relationship. If this ratio is acceptable for the washing result to be expected, the Rinsing process can be canceled. From the course of the first rinse cycle, the Compensation processes in the subsequent rinse cycles are closed. So that is Calculation of the necessary number and duration of further rinses from the temperature profile of the first wash cycle possible.

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

Abstract

The rinsing program execution method has a quantity of cold water supplied to the water sump, which is provided with a temperature sensor for measuring the temperature of the rinsing water as it is heated by heat exchange with the washing and the residual washing liquid, for controlling the duration of the rinsing cycle and/or the overall quantity of rinsing water.

Description

Die Erfindung betrifft ein Verfahren zur Durchführung eines Spülprogrammabschnitts zum Spülen von Wäsche in einer Waschmaschine, insbesondere in einer Trommelwaschmaschine, bei dem nach der Beendigung eines Waschprogrammabschnitts, in dem erwärmte Waschflotte in einem Laugenbehälter verwendet und anschließend aus diesem entleert wird, eine Teilmenge kalten Spülwassers in den Laugenbehälter gefüllt wird, wobei im unteren Bereich des Laugenbehälters sich ein Temperatursensor befindet.The invention relates to a method for carrying out a washing program section for Washing clothes in a washing machine, especially in a drum washing machine, in the heated washing liquor after the completion of a washing program section used in a tub and then emptied from it, a subset cold rinse water is filled into the tub, being in the lower part of the A temperature sensor.

Ein Verfahren zur Durchführung eines Spülprogrammabschnitts der eingangs genannten Art ist grundsätzlich vorbekannt und kann vom Fachmann auch aus druckschriftlich belegtem Stand der Technik (DE 42 19 276 A1 und DE 32 06 563 C2) im Wesentlichen entnommen werden. Ferner geht aus der DE 39 09 021 A1 hervor, wie die Zusammensetzung der Wäsche im Hauptwaschgang durch Auswertung ihres Saugverhaltens bestimmt wird. Es ist außerdem bekannt, andere Parameter zur Bestimmung der Zusammensetzung des Wäschepostens heranzuziehen, beispielsweise das Drehzahlverhalten (DE 44 38 760 A1). Darüber hinaus sind Waschmaschinen bekannt, bei denen der Benutzer die Zusammensetzung eingibt. Abhängig von der Zusammensetzung werden dann Spülwassermengen für mehrere Spülgänge berechnet oder vorgegeben. Diese werden dem Laugenbehälter zugeführt, wobei die Wäsche im Spülwasser für eine festgelegte Zeit bewegt und dieses anschließend entleert wird. Im Anschluss an die einzelnen Spülgänge wird die gebundene Spülflotte bei Trommelwaschmaschinen durch schnelle Drehung der Trommel (Schleudern) mittels Zentrifugalkraft ausgetrieben.A method for carrying out a washing program section of the type mentioned is basically known in advance and can also be done by a specialist from a printed document the technology (DE 42 19 276 A1 and DE 32 06 563 C2) are essentially taken. Furthermore, DE 39 09 021 A1 shows how the composition of the laundry in Main wash cycle is determined by evaluating their suction behavior. It is also known, other parameters for determining the composition of the laundry item to be used, for example the speed behavior (DE 44 38 760 A1). Beyond that Washing machines known in which the user enters the composition. Dependent Amounts of rinse water are then calculated from the composition for several rinses or given. These are fed to the tub, the laundry in Rinsing water is moved for a set time and then emptied. In connection the bound washing liquor in drum washing machines is attached to the individual rinsing cycles driven out by rapid rotation of the drum (centrifugal force).

Als Grundlage der Optimierung des Spülergebnisses dient bei bekannten Spülverfahren die Verdünnungsrechnung. Sie geht davon aus, dass die Waschmittel- und Schmutzreste in der Wäsche in gleichem Maße durch die in den Spülgängen zugesetzten Wassermengen verdünnt wird wie außerhalb der Wäsche befindliche Substanzen. Nach der Verdünnungsrechnung ist das Spülergebnis deshalb um so optimaler, je mehr Spülgänge verwendet werden.The basis for optimizing the washing result in known washing processes is the Dilution calculation. It assumes that the detergent and dirt residues in the Laundry diluted to the same extent by the amount of water added in the rinse cycles becomes like substances outside the laundry. According to the dilution calculation The rinse result is therefore the more optimal the more rinse cycles are used.

Es ist aber bekannt, dass sich in den Kapillaren der Fasern und an der Oberfläche der Wäsche zusätzlich Waschmittelbestandteile anlagern. Aus diesem Grund sind die nach dem Verdünnungsmodell berechneten Werte wesentlich geringer als die tatsächlich gemessenen. Im wesentlichen weist das Verdünnungsmodell folgende grundlegende Unzulänglichkeiten auf:

  • 1. Die Waschmittel- und Schmutzkonzentrationen in der Wäsche sind nicht die gleichen wie in der Flotte. Neben der durch die Restfeuchte nach dem Schleudern in der Wäsche verbleibenden Substanzen befinden sich zusätzlich in den Kapillaren an der Oberfläche der Wäsche gebundene Waschmittel- und Schmutzreste, die das Spülergebnis deutlich verschlechtern.
  • 2. Bei der Verdünnungsrechnung werden zeitliche Austauscheffekte (Transporteffekte) vernachlässigt. Das beste Spülergebnis wird in einem Spülgang erreicht, wenn sich zwischen der Alkalität der Flotte und der Wäsche ein Gleichgewicht gebildet hat. Das Gleichgewicht stellt sich erst nach einer gewissen Zeit ein. Der zeitliche Ausgleich ist aber neben der Waschmechanik auch von den eingesetzten Wassermengen und den vorhandenen Waschmittel- und Schmutzresten abhängig. So liefern bspw. zwei Spülgänge bei gleichen Gesamtzeiten und Spülwassermengen von ca. 42 Litern ein besseres Spülergebnis als drei Spülgänge.
    • However, it is known that detergent constituents also accumulate in the capillaries of the fibers and on the surface of the laundry. For this reason, the values calculated using the dilution model are significantly lower than those actually measured. Essentially, the dilution model has the following basic shortcomings:
  • 1. The detergent and dirt concentrations in the laundry are not the same as in the fleet. In addition to the substances remaining in the laundry due to the residual moisture after spinning, there are also detergent and dirt residues bound to the surface of the laundry in the capillaries, which significantly worsen the washing result.
  • 2. In the dilution calculation, temporal exchange effects (transport effects) are neglected. The best washing result is achieved in one wash cycle if there is a balance between the alkalinity of the liquor and the laundry. The balance is only established after a certain time. In addition to the washing mechanism, the time compensation also depends on the amount of water used and the detergent and dirt residues present. For example, two rinse cycles with the same total times and rinse water quantities of approx. 42 liters deliver a better rinse result than three rinse cycles.

    • Zur Vermeidung der vorgenannten Nachteile ist der Einsatz von Leitwertsensoren und Trübungssensoren zur Steuerung des Spülprozesses bekannt. Diese nehmen jedoch nur unwesentlichen Einfluss auf dessen Ergebnis. Sowohl dem Leitwertsensor als auch dem Trübungssensor ist gemein, dass deren Wirkung im besonderen Maße von den verschiedenen Zusammensetzungen des Waschmittels abhängig ist und daher ein durch diese Sensoren kontrollierter Ablauf von der Waschmittelart abhängt. So befinden sich z.B. in Flüssigwaschmitteln kaum nichtlösliche Bestandteile und wenig Alkalis, so dass von einem Trübungssensor bzw. Leitwertsensor Tenside auf der Wäsche nicht gemäß ihrer tatsächlichen Anteiligkeit erfasst werden. Über die Sensorik kann dann zu wenig Waschmittel erkannt werden, wodurch durch einen Eingriff in den Spülprozess eine Auswaschung der Tenside nicht hinreichend gewährleistet ist.To avoid the aforementioned disadvantages, the use of conductivity sensors and turbidity sensors is necessary known for controlling the rinsing process. However, these take only insignificant Influence on its result. Both the conductance sensor and the Turbidity sensor has in common that its effect is particularly different from the different Compositions of the detergent is dependent and therefore one through these sensors controlled process depends on the type of detergent. For example, in liquid detergents hardly any insoluble components and little alkali, so that from a turbidity sensor or conductivity sensor surfactants on the laundry not according to their actual proportion be recorded. Too little detergent can then be detected via the sensor system, as a result interfering with the rinsing process does not adequately wash out the surfactants is guaranteed.

    Der Erfindung stellt sich somit das Problem, ein Verfahren zum Spülen von Wäsche in einer Waschmaschine der eingangs genannten Art zu offenbaren, welches die vorgenannten Nachteile vermeidet und bei welchem Ausgleichsvorgänge zwischen Spülflotte und Wäsche auf einfache Weise ohne zusätzliche Sensorik berücksichtigt werden.The invention thus presents the problem of a method for washing laundry in one To disclose washing machine of the type mentioned, which has the aforementioned disadvantages avoids and at which leveling processes between washing liquor and laundry can be taken into account in a simple manner without additional sensors.

    Erfindungsgemäß wird dieses Problem durch ein Verfahren mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention, this problem is solved by a method with the features of the patent claim 1 solved. Advantageous refinements and developments of the invention result resulting from the following subclaims.

    Das beanspruchte Spülverfahren beruht auf der Annahme, dass die zeitliche Zunahme der Alkalität in der Spülflotte sehr gut mit der zeitlichen Änderung der Temperatur korreliert. Die Ausgleichsvorgänge der Temperatur hängen im wesentlichen von den Parametern

    • Flottentemperatur im vorherigen Spül- oder Waschgang
    • Restfeuchte der Wäsche
    • Spülwassermenge
    • Spülwassertemperatur
    • Umgebungstemperaturen
    ab und können durch Messung der Temperatur in der Flotte unter eventueller Einbeziehung der Umgebungstemperaturen und Simulation der Restfeuchte aus dem Drehzahlverlauf im vorhergehenden Schleudergang simuliert werden. Sie stehen zwar in keinem direkten physikalischen Zusammenhang mit dem zu erwartenden Spülwert, jedoch kann eine Ähnlichkeitsbeziehung (in beiden Fällen handelt es sich um Transportvorgänge) genutzt werden, um die zur Beendigung der Ausgleichsvorgänge zwischen Spülflotte und Wäsche erforderliche Spülzeit und/oder die dazu erforderliche Spülwassermenge festzulegen.The claimed rinsing process is based on the assumption that the increase in alkalinity in the rinsing liquor correlates very well with the change in temperature over time. The temperature compensation processes essentially depend on the parameters
    • Liquor temperature in the previous rinse or wash cycle
    • Residual moisture in the laundry
    • flush water
    • Wash water
    • ambient temperatures
    and can be simulated by measuring the temperature in the fleet, possibly taking into account the ambient temperatures and simulating the residual moisture from the speed curve in the previous spin cycle. Although they have no direct physical connection with the expected rinsing value, a similarity relationship (in both cases they are transport processes) can be used to determine the rinsing time and / or the amount of rinsing water required to complete the balancing processes between the washing liquor and the laundry set.

    Der mit der Erfindung erreichbare Vorteil besteht darin, dass zur Steuerung des Spülprozesses außer dem in den meisten Waschmaschinen bereits vorhandenen Temperatursensor keine zusätzliche Sensorik benötigt wird. Außerdem ist eine vom verwendeten Waschmittel unabhängige Beurteilung der Spülwirkung möglich.The advantage achievable with the invention is that for controlling the washing process apart from the temperature sensor already present in most washing machines, no additional ones Sensor technology is needed. It is also independent of the detergent used Assessment of the rinsing effect possible.

    In einer vorteilhaften Weiterbildung des erfindungsgemäßen Verfahrens ist der Spülprogrammabschnitt in mindestens zwei Spülgänge unterteilt und die Messung und Auswertung des Temperaturverlaufs erfolgt im ersten Spülgang (Anspruch 2). Zu diesem Zeitpunkt ist aufgrund der Erwärmung der Wäsche im Waschprogrammabschnitt ein relativ großer Temperaturunterschied zwischen Wäsche und Spülflotte zu erwarten, wodurch geringere Anforderungen an die Auflösung des Temperatursensors gestellt werden. Dies ist insbesondere dann der Fall, wenn die Messung und Auswertung des Temperaturverlaufs zu Beginn des ersten Spülgangs erfolgt (Anspruch 3) und der Temperaturanstieg der Spülflotte noch sehr groß ist. Durch Kenntnis des Temperaturverlaufs in diesem Teil kann der weitere Temperaturverlauf errechnet und auf dieser Basis in vorteilhafter Weise die Dauer (Anspruch 4) und die Anzahl (Anspruch 5) aller Spülgänge sowie die dabei verwendete Spülwassermenge und die erforderlichen Schleuderdrehzahlen zum Zwischenschleudern festgelegt werden (vergleiche die Ansprüche 6 und 7).In an advantageous development of the method according to the invention, the washing program section divided into at least two rinse cycles and the measurement and evaluation of the temperature profile takes place in the first rinse cycle (claim 2). At this time, due to the Heating the laundry in the washing program section a relatively large temperature difference expected between laundry and washing liquor, which means lower demands on the Resolution of the temperature sensor can be set. This is particularly the case if the temperature profile is measured and evaluated at the beginning of the first rinse cycle (Claim 3) and the rise in temperature of the washing liquor is still very large. By knowing the The temperature profile in this part can be used to calculate the further temperature profile and on this Basis advantageously the duration (claim 4) and the number (claim 5) of all rinses as well as the amount of rinse water used and the required spin speeds to be determined for intermediate spinning (compare claims 6 and 7).

    Ein Ausführungsbeispiel einer Waschmaschine zur Durchführung des erfindungsgemäßen Spülverfahrens der Erfindung wird nachfolgend näher beschrieben. Eine Zeichnung zeigt den Temperaturverlauf der Spülflotte im ersten Spülgang anhand eines Temperatur-Zeit-Diagramms. Die Waschmaschine besitzt in bekannter Weise einen Laugenbehälter, in dem eine Trommel zur Aufnahme von Wäsche drehbar gelagert ist. Im unteren Bereich des Laugenbehälters ist eine Heizung zur Erwärmung der Waschlauge angeordnet. Der Antrieb der Trommel erfolgt über einen Motor. Der Laugenbehälter ist an Federn schwingbeweglich im Gehäuse aufgehängt und wird zur Dämpfung dieser Schwingungen im unteren Bereich durch Stoßdämpfer gegenüber dem Gehäuseboden abgestützt. An embodiment of a washing machine for performing the invention Flushing method of the invention is described in more detail below. A drawing shows the Temperature course of the wash liquor in the first wash cycle using a temperature-time diagram. The washing machine has a tub in a drum in a known manner is rotatably mounted to hold laundry. In the lower area of the tub is a heater for heating the wash liquor is arranged. The drum is driven about an engine. The tub is suspended from the housing by springs and is opposed to damping these vibrations in the lower area by shock absorbers supported the case bottom.

    Mit Drehwahlschaltern und/oder Druckschaltern eines Bedienfelds kann der Benutzer verschiedene Waschprogramme wählen, die sich hinsichtlich der Wäscheart und der Temperatur der Waschlauge unterscheiden. Weitere Feinabstimmungen durch Zusatzfunktionen sind denkbar. Zur Steuerung der verschiedenen Waschprogramme ist eine Mikroprozessor-Steuerung vorgesehen, die über Signalleitungen mit verschiedenen Messgebern und den Bedienelementen verbunden ist. Sie gibt zeit- und zustandsabhängige Befehle über Steuerleitungen an verschiedene Aktoren weiter.With rotary selector switches and / or pressure switches on a control panel, the user can do different things Select washing programs that differ with regard to the type of laundry and the temperature of the Distinguish wash liquor. Further fine-tuning through additional functions is conceivable. A microprocessor control is provided to control the different washing programs, which are connected to various sensors and the control elements via signal lines is. It issues time and status-dependent commands to various control lines Actuators further.

    Unter den Messgebern der Waschmaschine befindet sich ein Gewichtssensor, mit dem die Beladungsmenge der Trommel ermittelt werden kann. Als Sensor wird in bekannter Weise ein parallel zum Stoßdämpfer angeordneter Lagesensor verwendet, mit welchem die gewichtsabhängige Laugenbehälter-Höhenlage erfasst wird. Andere Gewichtssensoren, beispielsweise Dehnungsmessstreifen, können ebenfalls verwendet werden. Aus dem statischen Anteil des Lagesensor-Signals wird von der Mikroprozessor-Steuerung die Beladungsmenge ermittelt und in einem Speicher abgelegt.There is a weight sensor under the washing machine's sensors, with which the Load amount of the drum can be determined. A sensor is used in a known manner Position sensor arranged parallel to the shock absorber, with which the weight-dependent Suds container altitude is detected. Other weight sensors, for example Strain gauges can also be used. From the static part of the Position sensor signal is determined by the microprocessor control and the load stored in a memory.

    Ein mit dem Motor gekoppelter Tachogenerator greift ein Motordrehzahlsignal zur Regelung ab, aus dem die Mikroprozessor-Steuerung die Regelabweichung der Drehzahl in den ersten Reversierzyklen bestimmt und ebenfalls speichert.A tachometer generator coupled to the motor picks up a motor speed signal for control purposes, from which the microprocessor control the control deviation of the speed in the first Reverse cycles determined and also saved.

    Zur Wasserstandsmessung ist mit dem Abflussbereich des Laugenbehälters eine Steigleitung verbunden, innerhalb der ein analoger Drucksensor als Niveausensor angeordnet ist. Der Zulauf des Frischwassers in den Laugenbehälter erfolgt über eine Leitung, in der sich ein von der Mikroprozessor-Steuerung geschaltetes Magnetventil befindet. Vorzugsweise kommen Magnetventile mit einem geringen Volumenstrom-Toleranzbereich über einen möglichst großen Druckbereich zum Einsatz. Über den analogen Drucksensor bestimmt die Mikroprozessor-Steuerung den Druckverlauf im Laugenbehälter durch Auswertung der Druckdifferenz und der Saugzeiten in den Saugphasen während des Wassereinlaufs, in denen das Magnetventil nicht geöffnet ist. Außerdem ermittelt sie die Wassereinlaufmenge durch Aufsummieren aller Magnetventil-Öffnungszeiten des jeweiligen Programmabschnitts.For the water level measurement there is a riser with the drain area of the tub connected, within which an analog pressure sensor is arranged as a level sensor. The The fresh water is fed into the tub via a line in which one of the microprocessor control solenoid valve is switched. Preferably come Solenoid valves with a small volume flow tolerance range over the largest possible Pressure range for use. The microprocessor control determines the analog pressure sensor the pressure curve in the tub by evaluating the pressure difference and the Suction times in the suction phases during the water inlet, in which the solenoid valve is not is open. In addition, it determines the water intake quantity by adding up all Solenoid valve opening times of the respective program section.

    Da auch das Saugverhalten, das Drehzahlverhalten, der Druckverlauf und die Wassereinlaufmengen von der Beladung und der Wäscheart abhängige Größen sind, können diese zur genaueren Bestimmung der Art und des Gewichts der Trommelbeladung herangezogen werden.Since also the suction behavior, the speed behavior, the pressure curve and the water inlet quantities depending on the load and the type of laundry, these can be used more precise determination of the type and weight of the drum load become.

    Ein Temperatursensor im unteren Bereich des Laugenbehälters ermöglicht während des Waschprogrammabschnitts die Temperaturregelung der Waschflotte, im Spülprogrammabschnitt erfolgt eine erfindungsgemäße Messung und Auswertung der Spülflottentemperatur, welche im Folgenden genauer beschrieben ist A temperature sensor in the lower area of the tub allows during the Washing program section the temperature control of the washing liquor, in the washing program section the washing liquor temperature is measured and evaluated, which is described in more detail below

    Der Programmabschnitt "Waschen" wird durchgeführt und dabei in bekannter Weise von der Mikroprozessor-Steuerung in Abhängigkeit von den Einstellwerten und den gemessenen Parametern beeinflusst. Anschließend erfolgt eine Entleerung der Waschlauge aus dem Laugenbehälter, unterstützt von einer Drehung der Trommel mit erhöhter Geschwindigkeit (Zwischenschleudem).The program section "washing" is carried out and in a known manner by the Microprocessor control depending on the setting values and the measured Parameters influenced. Then the washing liquor is emptied from the tub, supported by rotating the drum at increased speed (Zwischenschleudem).

    Danach erfolgt der Programmabschnitt "Spülen", der aus einzelnen Spülgängen besteht. Im ersten Spülgang wird dem Laugenbehälter eine von der Wäscheart und/oder der Wäschemenge abhängige Teilmenge von kaltem Frischwasser (Spülwasser) zugesetzt, welches unter Drehung der Trommel die Waschmittelreste aus der Wäsche ausspült. Spülwasser und Wäsche haben unterschiedliche Temperatur. Gerät nach der Hauptwäsche das kalte Spülwasser mit der warmen Wäsche in Kontakt, so wird sich aufgrund eines Wärmeaustausches zwischen Spülflotte und Wäsche die Spülflotte mit der Zeit allmählich erwärmen. Dabei streben die Spülflotte und die Wäsche eine Gleichgewichtstemperatur an. Diese ist noch von der Umgebungstemperatur abhängig, da bei niedrigerer Umgebungstemperatur noch zusätzliche Wärmeverluste nach außen zu erwarten sind.This is followed by the "Rinse" program section, which consists of individual rinse cycles. in the the washing compartment is the wash cycle one of the type of laundry and / or the amount of laundry dependent portion of cold fresh water (rinse water) added, which under Rotation of the drum rinses out the detergent residues from the laundry. Rinse water and Laundry have different temperatures. Machine the cold rinse water after the main wash in contact with the warm laundry, so it will be due to a heat exchange between the washing liquor and the laundry, gradually warm the washing liquor over time. Strive to do so the washing liquor and the laundry at an equilibrium temperature. This is still from the ambient temperature dependent, since additional at lower ambient temperature External heat losses are to be expected.

    Die Figur zeigt den Verlauf der Spülflottentemperatur als Temperatur-Zeit-Diagramm. Die Temperatur sinkt zunächst aufgrund des Zulaufs von kaltem Spülwasser auf eine Anfangstemperatur T0. Durch die warme, noch Waschflotte enthaltende Wäsche erfolgt anschließend ein Temperaturanstieg bis zur Gleichgewichtstemperatur TG. Aus dem Anfangsverlauf der Kurve (T1, T2, Δt = t(T1) - t(T2)) können die Gleichgewichtstemperatur TG und eine reziproke Zeitkonstante b, die den Temperaturanstieg ausdrückt, berechnet werden.The figure shows the course of the washing liquor temperature as a temperature-time diagram. The temperature initially drops to an initial temperature T 0 due to the inflow of cold rinse water. The warm laundry still containing the washing liquor then causes a temperature rise to the equilibrium temperature T G. The equilibrium temperature T G and a reciprocal time constant b, which expresses the temperature rise, can be calculated from the initial course of the curve (T 1 , T 2 , Δt = t (T 1 ) - t (T 2 )).

    Ein ähnliche Zeitverlauf stellt sich beim Alkali-Austausch zwischen Spülflotte und Wäsche ein. Der Austausch wird solange erfolgen, bis zwischen den Alkalis der Flotte und der Wäsche eine Gleichgewichtskonzentration vorhanden ist. Aufgrund der physikalischen Ähnlichkeit weist der Temperatur-Austauschvorgang zwischen Spülflotte und Wäsche den gleichen zeitlichen Verlauf wie der Austausch der Alkalis auf. Dies kann durch Messungen des Leitwerts in der Spülbadflotte bestätigt werden und ist somit physikalisch verifizierbar.A similar course of time occurs when the alkali is exchanged between the washing liquor and the laundry. The exchange will continue until there is one between the alkalis of the liquor and the laundry Equilibrium concentration is present. Due to the physical similarity, the Temperature exchange process between the washing liquor and the laundry over the same time course like exchanging the alkali on. This can be done by measuring the conductivity in the rinsing bath be confirmed and is therefore physically verifiable.

    Man kann also durch Messung des zeitlichen Verlaufs der Temperatur, unter Berücksichtigung der Umgebungstemperaturen auf den zeitlichen Austausch der Alkalis in der Flotte schließen. So wird bei einer zu geringen Wassermenge in der Spülflotte die sich einstellende Gleichgewichtstemperatur auf der Wäsche relativ hoch liegen. Im gleichen Maße wird auch die Konzentration von Alkalis auf der Wäsche hoch liegen. Daraus ergeben sich mehrer Möglichkeiten, den Spülprozess über den Temperaturverlauf dynamisch zu steuern: One can therefore take into account the measurement of the temperature over time of the ambient temperatures suggest the temporal exchange of the alkali in the fleet. If the amount of water in the washing liquor is too low, the equilibrium temperature that arises lie relatively high on the laundry. To the same extent also the concentration of alkali lying high on the laundry. This results in several possibilities, the Controlling the rinsing process dynamically via the temperature curve:

    1. Steuerung der Spülzeit1. Control of the rinsing time

    Die Spülzeit ist ein mitentscheidender Faktor für den Spülwert. Ist die Gleichgewichtskonzentration von Alkalis nicht erreicht, befinden sich mehr Alkalis auf der Wäsche. Entsprechend höher ist auch die Temperatur der Wäsche als die in der Flotte herrschende Temperatur. Man kann nun durch Messung des Temperaturverlaufes der Flotte die Gleichgewichtstemperatur abschätzen und diese Temperatur ins Verhältnis zu der gemessenen Temperatur setzen. In einem analogen Verhältnis stehen dann die Alkalis auf der Wäsche mit der Gleichgewichtskonzentration. Ist dieses Verhältnis für das zu erwartende Spülergebnis akzeptabel, kann der Spülvorgang abgebrochen werden. Aus dem Verlauf des ersten Spülgangs kann auf die Ausgleichsvorgänge in den nachfolgenden Spülgängen geschlossen werden. Somit ist die Berechnung der notwendigen Anzahl und Dauer weiterer Spülgänge aus dem Temperaturverlauf des ersten Spülgangs möglich.The rinsing time is a decisive factor for the rinsing value. Is the equilibrium concentration not reached by alkalis, there are more alkalis on the laundry. Corresponding The temperature of the laundry is also higher than the temperature prevailing in the liquor. you can now determine the equilibrium temperature by measuring the temperature profile of the fleet estimate and put this temperature in relation to the measured temperature. In The alkalis on the laundry with the equilibrium concentration then stand in an analogous relationship. If this ratio is acceptable for the washing result to be expected, the Rinsing process can be canceled. From the course of the first rinse cycle, the Compensation processes in the subsequent rinse cycles are closed. So that is Calculation of the necessary number and duration of further rinses from the temperature profile of the first wash cycle possible.

    2. Steuerung der Spülbadmenge und des Drehzahlverlaufes2. Control of the amount of rinsing bath and the speed curve

    Lässt der Temperaturverlauf im Spülbad eine zu hohe Gleichgewichtstemperatur erwarten, so ist davon auszugehen, dass vom Waschautomaten zu wenig Wasser getankt worden ist. Daraus wird dann ebenfalls ein schlechter Spülwert resultieren. In diesem Fall kann der Waschautomat verschiedenartig Einfluss auf den Programmablauf nehmen:

  • 2.1 Der Waschautomat tankt im aktuellen Spülgang soviel Wasser nach, bis eine den Anforderungen zufriedenstellende Gleichgewichtstemperatur erwartet werden kann. Über den zeitlichen Verlauf der Spülbadtemperatur wird dann, wie in 1. beschrieben, die Spüldauer kontrolliert. Ein Nachtanken im ersten Spülgang hat jedoch den Nachteil, dass aufgrund der verkürzten Einwirkzeit die Spülwirkung der nachgetankten Wassermenge nur gering ist.
  • 2.2 Es erfolgt kein Nachtanken im ersten Spülgang. Der Waschautomat schleudert nach dem aktuellen Spülgang mit einem erhöhten Drehzahlprofil, um die gebundene Flotte besser aus der Wäsche auszutreiben und damit die Alkalis auf der Wäsche zu verringern.
  • 2.3 Der Waschautomat tankt im nächsten Spülgang oder in den nächsten Spülgängen mehr Wasser als vom normalen Programmablauf vorgegeben, um eine höhere Ausspülung der Alkalis aus der Wäsche zu gewährleisten.
    • If the temperature curve in the rinsing bath indicates that the equilibrium temperature is too high, it can be assumed that the washing machine has not filled up with enough water. This will also result in a poor rinsing value. In this case, the washing machine can influence the program sequence in various ways:
  • 2.1 The washing machine refills enough water in the current rinse cycle until an equilibrium temperature satisfying the requirements can be expected. The rinsing time is then controlled as described in 1. over the course of the rinsing bath temperature. Refueling in the first rinse cycle has the disadvantage, however, that the rinsing effect of the refilled amount of water is only slight due to the shortened exposure time.
  • 2.2 There is no refueling in the first wash cycle. The washing machine spins after the current rinse cycle with an increased speed profile in order to better drive the bound liquor out of the laundry and thus reduce the alkalis on the laundry.
  • 2.3 The washing machine refills more water in the next rinse cycle or in the next rinse cycles than specified by the normal program sequence in order to ensure a higher rinsing out of the alkalis from the laundry.

    • Eine Kombination von erhöhtem Drehzahlprofil und erhöhter Spülwasserzufuhr in den folgenden Spülgängen ist möglich und sinnvoll.A combination of increased speed profile and increased rinse water supply in the following Rinse cycles are possible and useful.

    Claims (7)

    1. Method for implementing a rinse programme portion for rinsing washing in a washing machine, in particular in a drum washing machine, in which, after the completion of a wash programme portion, in which heated detergent solution in a detergent solution container is used and subsequently emptied therefrom, a partial quantity of cold rinse water is filled into the detergent solution container, a temperature sensor being situated in the lower region of the detergent solution container,
      characterised in that,
      at least in a current programme or time portion, the temperature of the detergent solution, i.e. of the mixture of heated washing or detergent solution which is contained therein and introduced cold rinse water, is measured by the temperature sensor, and the duration of the rinse programme portion and/or the entire quantity of the rinse water is determined dependent upon the measured temperature course.
    2. Method for implementing a rinse programme portion according to claim 1,
      characterised in that
      the rinse programme portion is subdivided into at least two rinse operations and in that the measurement and evaluation of the temperature course is effected in the first rinse operation.
    3. Method for implementing a rinse programme portion according to claim 2,
      characterised in that
      the measurement and evaluation of the temperature course is effected at the beginning of the first rinse operation.
    4. Method for implementing a rinse programme portion according to claim 3,
      characterised in that
      the duration of all rinse operations is determined from the temperature course measured at the beginning of the first rinse operation.
    5. Method for implementing a rinse programme portion according to at least one of the claims 2 or 3,
      characterised in that
      the number of rinse operations is determined from the temperature course measured in the first rinse operation.
    6. Method for implementing a rinse programme portion according to at least one of the claims 2 to 4,
      characterised in that
      a fixed partial quantity of cold rinse water is used in the first rinse operation, and in that the partial quantity/quantities which is/are used in the further rinse operation(s) are determined on the basis of the temperature course of the rinse water in the first rinse operation.
    7. Method for implementing a rinse programme portion according to at least one of the claims 2 to 6,
      characterised in that,
      from the temperature course measured in the first rinse operation, the level and/or the increase in the spin drier rpm is determined in at least one spin operation which is subsequent to a rinse operation.
    EP01104097A 2000-04-06 2001-02-21 Method for rinsing laundry in a washing machine Expired - Lifetime EP1143058B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10017160A DE10017160C1 (en) 2000-04-06 2000-04-06 Rinsing program execution method for drum washing machine uses measured temperature characteristic of rinsing liquid during rinsing cycle for control of rinsing cycle
    DE10017160 2000-04-06

    Publications (3)

    Publication Number Publication Date
    EP1143058A2 EP1143058A2 (en) 2001-10-10
    EP1143058A3 EP1143058A3 (en) 2001-10-31
    EP1143058B1 true EP1143058B1 (en) 2004-01-14

    Family

    ID=7637811

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01104097A Expired - Lifetime EP1143058B1 (en) 2000-04-06 2001-02-21 Method for rinsing laundry in a washing machine

    Country Status (4)

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    EP (1) EP1143058B1 (en)
    AT (1) ATE257870T1 (en)
    DE (2) DE10017160C1 (en)
    ES (1) ES2210046T3 (en)

    Families Citing this family (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102007002184B4 (en) 2007-01-15 2018-03-15 BSH Hausgeräte GmbH Method for washing items of laundry in a program-controlled domestic appliance, and such household appliance
    DE102009002622B4 (en) 2009-04-24 2016-01-14 BSH Hausgeräte GmbH Method for carrying out a rinsing phase in a drum washing machine
    KR101530849B1 (en) 2011-01-04 2015-06-23 삼성전자 주식회사 Washing machine and control method thereof
    DE102015107689A1 (en) * 2015-05-18 2016-11-24 Miele & Cie. Kg Method for controlling a speed of a washing drum of a washing machine, control unit and washing machine
    CN112921588B (en) * 2021-01-25 2022-04-15 珠海格力电器股份有限公司 Washing machine control method, device, equipment and storage medium

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3206563A1 (en) * 1982-02-24 1983-09-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Control device for a washing machine
    DE3909021A1 (en) * 1989-03-18 1990-09-20 Miele & Cie Method for controlling the programme in a washing machine
    DE4219276A1 (en) * 1992-06-12 1993-12-16 Licentia Gmbh Washing or dishwashing machine - has programme control and measurement device for degree of dirtiness of washing or rinsing water
    DE4438760A1 (en) * 1994-10-29 1996-05-02 Miele & Cie Method for determining a load level dependent on the type of laundry and the amount of laundry

    Also Published As

    Publication number Publication date
    DE10017160C1 (en) 2001-04-05
    EP1143058A3 (en) 2001-10-31
    EP1143058A2 (en) 2001-10-10
    ATE257870T1 (en) 2004-01-15
    ES2210046T3 (en) 2004-07-01
    DE50101307D1 (en) 2004-02-19

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