EP0030602B1 - Method and apparatus of rinsing washed laundry in a programme-controlled washing machine - Google Patents
Method and apparatus of rinsing washed laundry in a programme-controlled washing machine Download PDFInfo
- Publication number
- EP0030602B1 EP0030602B1 EP80106458A EP80106458A EP0030602B1 EP 0030602 B1 EP0030602 B1 EP 0030602B1 EP 80106458 A EP80106458 A EP 80106458A EP 80106458 A EP80106458 A EP 80106458A EP 0030602 B1 EP0030602 B1 EP 0030602B1
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- Prior art keywords
- rinsing
- program
- percentage
- measuring equipment
- pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/22—Condition of the washing liquid, e.g. turbidity
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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
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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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/20—Washing liquid condition, e.g. turbidity
- D06F2103/22—Content of detergent or additives
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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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/08—Draining of washing liquids
Definitions
- the invention is based on a method for rinsing laundry washed in a program-controlled washing machine in several rinsing cycles in succession as a function of output signals from a measuring device which determines the rinsing water pollution and which causes the program control device to terminate the program when determining a rinsing water pollution which is permissible.
- the wash program is only aborted when determining a permissible rinsing water contamination.
- the measuring and comparison device can happen to recognize a badly mixed amount of lye as admissible, although other lye components that are not mixed have an excessively high degree of soiling. In this case, the washing result would not be satisfactory.
- a device for determining the rinsing effect is also known (FR-A-2 023 381), the principle of which, however, is based on the measurement of the light absorption as a function of the pollution of the rinsing liquor that remains in a specific measuring section.
- the object of the invention is to develop a method specified in the preamble of claim 1 in such a way that the measurement of the washing effect becomes more reliable, so that the washing effect can be improved with the optimal use of agents. Furthermore, the use of fabric softeners or other laundry care products must not have any influence on the measurement result and thus on the result of the wash.
- this object is achieved in that the measuring device is activated for a limited period of time at the end of each wash cycle, which is characterized by moving the drum and subsequent pumping out of the wash liquor, and in that the program control device for overriding the program steps until the program ends to end the program Pump down is set before the last rinse.
- the particular advantage of the method according to the invention over the prior art is that, on the one hand, the detergent soiling is measured when the movement is very irregular and the probability of the measuring device responding prematurely is low. On the other hand, a last rinse cycle is also provided to protect against this low probability of the total soiling of the wash liquor, which is still too high, and by means of which this soiling is largely eliminated.
- a further advantage resulting therefrom is achieved in a particularly advantageous circuit arrangement for carrying out the method according to the invention, in which switching means for activating the measuring device are provided, which work at least partially in time connection with switching means for the operation of the drain pump.
- This advantage consists in the fact that, without further circuitry measures, a program part is available in which a fabric softener or other laundry treatment provided for many program types can be carried out.
- the known methods disadvantageously require special program change switching measures. An effective activation of the measuring device in the last rinse cycle is precluded by suitable measures so that an additional laundry care agent cannot falsify the measurement result.
- the level of the washing liquor of the tub is plotted over time.
- the line UM indicates the switched-on operating voltage for the measuring device over time
- the line UK shows the operation of the coupling magnet provided for an electromechanical program control device during the course of the program.
- the measuring device is activated by applying the operating voltage. This time period can either start at a high level N2 and end when pumping down or start and end when pumping down. During this period, there is the greatest probability of determining a degree of purity that affects the entire washing liquor.
- the measuring device does not yet determine the desired high degree of purity - this is illustrated by the blank rectangles of the diagram line UM.
- the measuring device determines that a desired high degree of purity of the washing liquor has been reached (the rectangle in the diagram line UM is filled) and now outputs an output signal to the program control device.
- the electrical circuit of the washing machine shown in extracts in FIG. 2 shows the internal power lines P and Mp, to which the internal equipment of the machine can be switched to voltage via switches P1 to P3 of a program control device.
- the machine's internal equipment is only shown here: A transformer TR for providing the supply voltage for the measuring device M and the downstream amplifier V, the supply voltage switch for the measuring device M, the motor for the drain pump LP and the coupling magnet KM for the electromechanical program control device, not shown .
- the circuit arrangement is designed in such a way that a constant power supply for the measuring device and its amplifier is offered through a program contact P1.
- the measuring device itself is only connected to the voltage converted by the transformer TR by the contact of the relay UM when the drain pump motor LP is switched on by the program contact P2.
- the measuring device M consists essentially of a Wheatstone resistance bridge, one branch of which consists of a partial resistor of an adjustable resistor R1 and a resistor RW and the other branch of which consists of the other partial resistor of the adjusting resistor R1 and the resistor RL.
- the resistors RW and RL result from the conductivity of the fresh water RW flowing through between electrodes arranged at a suitable location or from the conductivity of the rinsing solution RL located between electrodes arranged at a suitable location.
- the partial voltages of the two bridge branches are known to be coupled out via diodes and form the output signals for a differential amplifier V, which is set such that it allows the current to flow through the relay UK at a predetermined small difference in the signals at its inputs (-) and (+) .
- the then excited relay UK switches the coupling magnet KM to voltage by means of its contact uk - the program switch P3 is closed in the rinsing program as required. Therefore, the KM coupling magnet switches the program switching mechanism to the position for the pumping process before the last rinse cycle. There the program switch P3 interrupts the circuit for the coupling magnet.
- the line W is provided, via which the circuit for the coupling magnet can be closed if necessary during the washing program.
- the specified circuit arrangement ensures that the measurement process is only ever carried out in a phase in which the wash liquor is distributed turbulently. This effectively prevents the risk of the program switching mechanism being switched on prematurely.
- a switching on together with the washing drum drive motor (not shown) can also be provided. Then there still has to be a switching dependency, which only enables the measuring device M to be switched on, for example, during the last drum run phase of each rinse cycle, so that wash solution which is not so heavily soiled at the start of the rinse cycle does not falsify the measurement result.
- the switching dependency can also be coupled with a water level sensor switching at level N2.
Abstract
Description
Die Erfindung geht aus von einem Verfahren zum Spülen von in einer programmgesteuerten Waschmaschine gewaschener Wäsche in mehreren Spülgängen nacheinander in Abhängigkeit von Ausgangssignalen einer die Spülwasserverschmutzung ermittelnden Messeinrichtung, die beim Ermitteln einer bestimmungsgemäss zulässigen Spülwasserverschmutzung die Programmsteuereinrichtung zum Beenden des Programms veranlasst.The invention is based on a method for rinsing laundry washed in a program-controlled washing machine in several rinsing cycles in succession as a function of output signals from a measuring device which determines the rinsing water pollution and which causes the program control device to terminate the program when determining a rinsing water pollution which is permissible.
Ein derartiges Verfahren ist durch FR-A-2 412 638 bekannt. Dort ist aber die Ermittlung der Spülwasserverschmutzung nur auf den Ablauf einer bestimmten Zeitspanne nach Beginn der Spülphase festgelegt und auf eine mehrmalige Wiederholung dieser Ermittlung zu ebenfalls vorbestimmten Zeitpunkten. Die Auswahl des am besten geeigneten Zeitpunkts für eine solche Ermittlung lässt das bekannte Verfahren jedoch offen, was für die Messsicherheit eine bedeutende Einschränkung zur Folge hat.Such a method is known from FR-A-2 412 638. There, however, the determination of the rinsing water pollution is only fixed to the expiry of a certain period of time after the start of the rinsing phase and to a repeated repetition of this determination at likewise predetermined times. However, the selection of the most suitable point in time for such a determination leaves the known method open, which results in a significant restriction for the measurement reliability.
Ferner wird beim Ermitteln einer bestimmungsgemäss zulässigen Spülwasserverschmutzung das Spülprogramm lediglich abgebrochen. Dabei kann die Mess- und Vergleichseinrichtung zufällig eine schlecht durchmischte Laugenmenge als zulässig verschmutzt erkennen, obwohl noch andere nicht vermengte Laugenanteile einen zu hohen Verschmutzungsgrad aufweisen. Das Spülergebnis würde in diesem Falle nicht befriedigen.Furthermore, the wash program is only aborted when determining a permissible rinsing water contamination. The measuring and comparison device can happen to recognize a badly mixed amount of lye as admissible, although other lye components that are not mixed have an excessively high degree of soiling. In this case, the washing result would not be satisfactory.
Ferner kann ein Weichspülgang - wie es häufig beim Waschen und Spülen im Haushalt gefordert wird - bei der bekannten Waschmaschine nicht mit dem gewünschten Erfolg angewendet werden. Zwar soll für diesen Fall das Messergebnis des vorletzten Spülganges bereits auf den Erfolg des letzten Spülganges schliessen lassen und diesem letzten Spülgang das Weichspülmittel zugegeben werden. Der Effekt des letzten Spülganges soll daher geschätzt werden, was eben dieselben Unsicherheiten in sich birgt, die auf Seite 1, Zeilen 13 bis 23, der FR-A-2 412 638 beim Stand der Technik gerügt worden sind. Da sich die verschiedenen angewendeten Waschmittel, die mittels der Spülgänge aus der Wäsche gespült werden sollen, hinsichtlich ihrer Rückstände in der Wäsche unterschiedlich verhalten, kann nämlich keine hinlänglich sichere Abschätzung über den Effekt des letzten Spülganges getroffen werden.Furthermore, a fabric softener cycle - as is often required for washing and rinsing in the household - cannot be used with the known washing machine with the desired success. In this case, the measurement result of the penultimate rinse should already indicate the success of the last rinse and the fabric softener should be added to this last rinse. The effect of the last rinse cycle should therefore be estimated, which harbors the same uncertainties that were criticized in the prior art on page 1, lines 13 to 23 of FR-A-2 412 638. Since the various detergents used, which are to be washed out of the laundry by means of the rinse cycles, behave differently with regard to their residues in the laundry, an adequately reliable estimate of the effect of the last rinse cycle cannot be made.
Es ist auch noch eine Einrichtung zum Ermitteln der Spülwirkung bekannt (FR-A-2 023 381), deren Prinzip jedoch auf der Messung der Lichtabsorption in Abhängigkeit von der Verschmutzung der in einer bestimmten Messstrecke verweilenden Spüllauge beruht.A device for determining the rinsing effect is also known (FR-A-2 023 381), the principle of which, however, is based on the measurement of the light absorption as a function of the pollution of the rinsing liquor that remains in a specific measuring section.
Dieses Prinzip lässt jedoch keine sicheren Messwerte bei sehr stark verdünnter Lauge zu, so dass seine Verwirklichung hieran scheitert.However, this principle does not allow reliable measurements with very strongly diluted alkali, so that its implementation fails.
Der Erfindung liegt die Aufgabe zugrunde, ein im Oberbegriff des Anspruches 1 angegebenes Verfahren so auszubilden, dass die Messung der Spülwirkung sicherer wird, damit die Spülwirkung unter optimalem Einsatz von Mitteln verbessert werden kann. Ferner darf der Einsatz von Weichspülmitteln oder sonstigen Wäschepflegemitteln keinen Einfluss auf das Messergebnis und damit auf das Spülergebnis haben.The object of the invention is to develop a method specified in the preamble of claim 1 in such a way that the measurement of the washing effect becomes more reliable, so that the washing effect can be improved with the optimal use of agents. Furthermore, the use of fabric softeners or other laundry care products must not have any influence on the measurement result and thus on the result of the wash.
Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass die Messeinrichtung am Ende eines jeden Spülganges für einen begrenzten Zeitabschnitt wirksam geschaltet wird, der durch Bewegen der Trommel und anschliessendes Abpumpen der Spüllauge gekennzeichnet ist, und dass zum Beenden des Programms die Programmsteuereinrichtung zum Überfahren der Programmschritte bis zum Abpumpen vor dem letzten Spülgang eingestellt wird.According to the invention, this object is achieved in that the measuring device is activated for a limited period of time at the end of each wash cycle, which is characterized by moving the drum and subsequent pumping out of the wash liquor, and in that the program control device for overriding the program steps until the program ends to end the program Pump down is set before the last rinse.
Der besondere Vorteil des erfindungsgemässen Verfahrens gegenüber dem Stand der Technik besteht darin, dass einerseits die Messung der Spüllaugenverschmutzung bei stark ungleichförmiger Bewegung stattfindet und die Wahrscheinlichkeit des vorzeitigen Ansprechens der Messeinrichtung gering ist. Anderseits ist zur Sicherung gegen diese geringe Wahrscheinlichkeit der trotzdem noch zu hohen Gesamtverschmutzung der Spüllauge zusätzlich ein letzter Spülgang vorgesehen, durch den dann auch noch diese Verschmutzung weitgehend beseitigt wird.The particular advantage of the method according to the invention over the prior art is that, on the one hand, the detergent soiling is measured when the movement is very irregular and the probability of the measuring device responding prematurely is low. On the other hand, a last rinse cycle is also provided to protect against this low probability of the total soiling of the wash liquor, which is still too high, and by means of which this soiling is largely eliminated.
Ein weiterer sich daraus ergebender Vorteil wird bei einer besonders vorteilhaften Schaltungsanordnung zur Durchführung des erfindungsgemässen Verfahrens erzielt, bei der Schaltmittel zum Wirksamschalten der Messeinrichtung vorgesehen sind, die mindestens teilweise in zeitlichem Zusammenhang mit Schaltmitteln für den Betrieb der Laugenablaufpumpe arbeiten. Dieser Vorteil besteht darin, dass ohne weitere schaltungstechnische Massnahmen ein Programmteil vorhanden ist, bei dem eine bei vielen Programmarten vorgesehene Weichspül- oder sonstige Wäschebehandlung vollzogen werden kann. Die bekannten Verfahren benötigen dazu nachteiligerweise besondere Programmänderungs-Schaltmassnahmen. Eine Wirksamschaltung der Messeinrichtung im letzten Spülgang wird dabei durch geeignete Massnahmen ausgeschlossen, damit ein zusätzliches Wäschepflegemittel das Messergebnis nicht verfälschen kann.A further advantage resulting therefrom is achieved in a particularly advantageous circuit arrangement for carrying out the method according to the invention, in which switching means for activating the measuring device are provided, which work at least partially in time connection with switching means for the operation of the drain pump. This advantage consists in the fact that, without further circuitry measures, a program part is available in which a fabric softener or other laundry treatment provided for many program types can be carried out. For this purpose, the known methods disadvantageously require special program change switching measures. An effective activation of the measuring device in the last rinse cycle is precluded by suitable measures so that an additional laundry care agent cannot falsify the measurement result.
Anhand der Zeichnung, in der auch ein vorteilhaftes Ausführungsbeispiel für eine erfindungsgemässe Schaltungsanordnung dargestellt ist, ist die Erfindung nachstehend erläutert.The invention is explained below on the basis of the drawing, which also shows an advantageous exemplary embodiment of a circuit arrangement according to the invention.
Es zeigen:
- Fig. 1 ein Zeitablauf-Diagramm für ein beispielsweise angenommenes Spülprogramm,
- Fig. 2 der die Messeinrichtung betreffende Ausschnitt einer elektrischen Schaltungsanordnung für eine erfindungsgemäss ausgestaltete Waschmaschine.
- 1 is a timing diagram for an assumed washing program,
- 2 the section of an electrical circuit arrangement relating to the measuring device for a washing machine designed according to the invention.
In der oberen Zeile der Fig. 1 ist das Niveau der Spülflotte des Laugenbehälters über die Zeit aufgetragen. Die Zeile UM gibt die eingeschaltete Betriebsspannung für die Messeinrichtung über die Zeit an, und die Zeile UK zeigt den Betrieb des für ein elektromechanisches Programmsteuergerät vorgesehenen Kuppelmagneten im Verlaufe des Programmablaufs an. Beim Waschen steigt die Waschflotte bis zum Niveau 1. Am Ende des Waschvorganges wird zumeist in einem sogenannten Durchlaufspül-Programmschritt eine allmähliche Erhöhung des Flottenstandes bis zum Niveau N2 vorgesehen. Dann laufen üblicherweise maximal fünf bis sieben Spülgänge ab, die einerseits durch das Auffüllen des Waschbehälters bis zum Niveau N2 und anderseits durch Bewegen der Trommel und anschliessendes Abpumpen der Spüllauge gekennzeichnet sind.In the upper line of FIG. 1, the level of the washing liquor of the tub is plotted over time. The line UM indicates the switched-on operating voltage for the measuring device over time, and the line UK shows the operation of the coupling magnet provided for an electromechanical program control device during the course of the program. When washing rises the washing liquor up to level 1. At the end of the washing process, a gradual increase in the liquor level up to level N2 is usually provided in a so-called continuous rinse program step. Then usually a maximum of five to seven rinse cycles run, which are characterized on the one hand by filling the washing container up to level N2 and on the other hand by moving the drum and then pumping out the rinsing solution.
In einem schraffiert dargestellten Zeitabschnitt am Ende eines jeden Spülgangs wird die Messeinrichtung durch Anlegen von Betriebsspannung wirksam geschaltet. Dieser Zeitabschnitt kann entweder bei hohem Niveau N2 beginnen und beim Abpumpen enden oder beim Abpumpen beginnen und enden. In diesem Zeitabschnitt besteht die grösste Wahrscheinlichkeit zur Feststellung eines die gesamte Spülflotte betreffenden Reinheitsgrades. Am Ende des ersten und des zweiten Spülganges stellt die Messeinrichtung den gewünschten hohen Reinheitsgrad noch nicht fest - dies ist durch unausgefüllte Rechtecke der Diagrammlinie UM verdeutlicht. Demgegenüber stellt die Messeinrichtung am Ende des dritten Spülganges das Erreichen eines gewünschten hohen Reinheitsgrades der Spülllauge fest (das Rechteck in der Diagrammlinie UM ist ausgefüllt) und gibt nunmehr ein Ausgangssignal an die Programmsteuereinrichtung ab. Diese überfährt nun die im Programm normalerweise noch vorgesehenen vierten bis sechsten Spülgänge und setzt das Programm erst beim Abpumpen vor dem letzten Spülgang fort. Sofern beim Beginn der Überfahr-Schritte die Laugenablaufpumpe bereits ihren Betrieb aufgenommen hat, wird dieser ebenfalls unterbrochen bis der Überfahr-Vorgang beendet ist. Dies ist durch die nach dem dritten Spülgang unter dem Niveau N2 eingezeichnete gestrichelte Linie angedeutet. Dann wird der Laugenbehälter völlig geleert und der letzte Spülgang eingeleitet, dessen Ablauf prinzipiell den vorhergehenden Spülgängen gleicht. Am Ende des gesamten Wasch-und Spülprogramms liegt bei allen möglichen Verschmutzungsgraden und Beladungsmengen des zu behandelnden Wäschepostens ein ausgezeichnetes Spülergebnis vor.In a hatched period at the end of each wash cycle, the measuring device is activated by applying the operating voltage. This time period can either start at a high level N2 and end when pumping down or start and end when pumping down. During this period, there is the greatest probability of determining a degree of purity that affects the entire washing liquor. At the end of the first and second rinse cycle, the measuring device does not yet determine the desired high degree of purity - this is illustrated by the blank rectangles of the diagram line UM. In contrast, at the end of the third rinse cycle, the measuring device determines that a desired high degree of purity of the washing liquor has been reached (the rectangle in the diagram line UM is filled) and now outputs an output signal to the program control device. This now runs over the fourth to sixth rinse cycles normally provided in the program and only continues the program when pumping out before the last rinse cycle. If the drain pump has already started operating at the start of the run-over steps, this will also be interrupted until the run-over process has ended. This is indicated by the dashed line drawn below the level N2 after the third rinse cycle. Then the tub is completely emptied and the last rinse cycle is initiated, the process of which is basically the same as the previous rinse cycle. At the end of the entire washing and rinsing program, there is an excellent rinsing result with all possible degrees of soiling and loading of the laundry item to be treated.
Die in Fig. 2 auszugsweise dargestellte elektrische Schaltung der Waschmaschine zeigt die internen Netzleitungen P und Mp, an die über Schalter P1 bis P3 einer Programmsteuereinrichtung maschineninterne Ausrüstung an Spannung schaltbar ist. Von der maschineninternen Ausrüstung sind hier nur dargestellt: Ein Transformator TR zur Bereitstellung der Versorgungsspannung für die Messeinrichtung M und den nachgeschalteten Verstärker V, der Versorgungsspannungsschalter um für die Messeinrichtung M, der Motor für die Laugenpumpe LP und der Kuppelmagnet KM für die nicht dargestellte elektromechanische Programmsteuereinrichtung.The electrical circuit of the washing machine shown in extracts in FIG. 2 shows the internal power lines P and Mp, to which the internal equipment of the machine can be switched to voltage via switches P1 to P3 of a program control device. The machine's internal equipment is only shown here: A transformer TR for providing the supply voltage for the measuring device M and the downstream amplifier V, the supply voltage switch for the measuring device M, the motor for the drain pump LP and the coupling magnet KM for the electromechanical program control device, not shown .
Die Schaltungsanordnung istso ausgelegt, dass durch einen Programmkontakt P1 ständige Spannungsversorgung für die Messeinrichtung und deren Verstärker angeboten wird. Die Messeinrichtung selbst wird jedoch erst durch den Kontakt des Relais UM beim Einschalten des Laugenpumpen-Motors LP durch den Programmkontakt P2 an die vom Transformator TR umgeformte Spannung gelegt. Die Messeinrichtung M besteht im wesentlichen aus einer Wheatstone'schen Widerstandsbrücke, deren einer Zweig aus einem Teilwiderstand eines einstellbaren Widerstandes R1 und aus einem Widerstand RW und deren anderer Zweig aus dem anderen Teilwiderstand des Einstellwiderstandes R1 und dem Widerstand RL bestehen. Die Widerstände RW und RL ergeben sich aus der Leitfähigkeit des zwischen an geeignetem Ort angeordneten Elektroden hindurchfliessenden Frischwassers RW bzw. aus der Leitfähigkeit der zwischen an geeignetem Ort angeordneten Elektroden befindlichen Spüllauge RL. Die Teilspannungen der beiden Brückenzweige werden bekanntermassen über Dioden ausgekoppelt und bilden die Ausgangssignale für einen Differenzverstärker V, der so eingestellt ist, dass er bei einer vorbestimmten geringen Differenz der Signale an seinen Eingängen (-) und (+) den Stromfluss durch das Relais UK ermöglicht.The circuit arrangement is designed in such a way that a constant power supply for the measuring device and its amplifier is offered through a program contact P1. However, the measuring device itself is only connected to the voltage converted by the transformer TR by the contact of the relay UM when the drain pump motor LP is switched on by the program contact P2. The measuring device M consists essentially of a Wheatstone resistance bridge, one branch of which consists of a partial resistor of an adjustable resistor R1 and a resistor RW and the other branch of which consists of the other partial resistor of the adjusting resistor R1 and the resistor RL. The resistors RW and RL result from the conductivity of the fresh water RW flowing through between electrodes arranged at a suitable location or from the conductivity of the rinsing solution RL located between electrodes arranged at a suitable location. The partial voltages of the two bridge branches are known to be coupled out via diodes and form the output signals for a differential amplifier V, which is set such that it allows the current to flow through the relay UK at a predetermined small difference in the signals at its inputs (-) and (+) .
Das dann erregte Relais UK schaltet mittels seines Kontakts uk den Kuppelmagneten KM an Spannung - der Programmschalter P3 ist im Spülprogramm voraussetzungsgemäss geschlossen. Daher schaltet der Kuppelmagnet KM das Programmschaltwerk im Schnellgang bis in die Position für den Pumpvorgang vor dem letzten Spülgang. Dort unterbricht nämlich der Programmschalter P3 den Stromkreis für den Kuppelmagneten. Zur Gewährleistung der Steuerung des Kuppelmagneten KM ausserhalb des Spülprogramms ist die Leitung W vorgesehen, über die der Stromkreis für den Kuppelmagneten gegebenenfalls beim Waschprogramm geschlossen werden kann.The then excited relay UK switches the coupling magnet KM to voltage by means of its contact uk - the program switch P3 is closed in the rinsing program as required. Therefore, the KM coupling magnet switches the program switching mechanism to the position for the pumping process before the last rinse cycle. There the program switch P3 interrupts the circuit for the coupling magnet. To ensure the control of the coupling magnet KM outside the washing program, the line W is provided, via which the circuit for the coupling magnet can be closed if necessary during the washing program.
Durch die angegebene Schaltungsanordnung sit gesichert, dass der Messvorgang immer nur in einer Phase erfolgt, in der die Spüllauge turbulent verteilt ist. Dadurch kann die Gefahr der vorzeitigen Weiterschaltung des Programmschaltwerks wirksam vermieden werden.The specified circuit arrangement ensures that the measurement process is only ever carried out in a phase in which the wash liquor is distributed turbulently. This effectively prevents the risk of the program switching mechanism being switched on prematurely.
Anstelle der gemeinschaftlich mit dem Laugenpumpenmotor LP erfolgenden Betriebsspannungseinschaltung für die Messeinrichtung M kann auch eine Einschaltung gemeinsam mit dem Waschtrommel-Antriebsmotor (nicht dargestellt) vorgesehen sein. Dann muss aber noch eine Schaltabhängigkeit bestehen, welche die Einschaltung der Messeinrichtung M beispielsweise nur bei der letzten Trommellauf-Phase jedes Spülganges ermöglicht, damit nicht bereits bei Beginn des Spülganges evtl. doch noch nicht so stark verschmutzte Spüllauge das Messergebnis verfälscht. U.U. kann die Schaltabhängigkeit auch noch mit einem beim Niveau N2 schaltenden Wasserstandgeber gekoppelt sein.Instead of the operating voltage switching on for the measuring device M, which is carried out jointly with the drain pump motor LP, a switching on together with the washing drum drive motor (not shown) can also be provided. Then there still has to be a switching dependency, which only enables the measuring device M to be switched on, for example, during the last drum run phase of each rinse cycle, so that wash solution which is not so heavily soiled at the start of the rinse cycle does not falsify the measurement result. U.U. the switching dependency can also be coupled with a water level sensor switching at level N2.
Anstelle einer nach dem Prinzip der Leitwertmessung arbeitenden Messeinrichtung M kann diese auch auf jedem anderen denkbaren Prinzip basieren. Die einschlägige Literatur enthält dafür viele Hinweise. Beispielsweise kann das Messergebnis auf der Trübungsmessung mittels Licht basieren. Dabei wirkt die nicht eingeschaltete, dunkle Lichtquelle ebenfalls so, als wäre maximale Trübung vorhanden. Der Spülvorgang kann dabei ebenfalls nicht vorzeitig abgebrochen werden.Instead of a measuring device M operating on the principle of conductivity measurement, this can also be based on any other conceivable principle. The relevant literature contains many tips for this. For example, the measurement result on the turbidity measurement using light based. The dark light source, which is not switched on, also acts as if maximum cloudiness were present. The rinsing process cannot be stopped prematurely either.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT80106458T ATE9364T1 (en) | 1979-12-18 | 1980-10-23 | METHOD AND DEVICE FOR RINSING LAUNDRY WASHED IN A PROGRAM CONTROLLED WASHING MACHINE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2950929 | 1979-12-18 | ||
DE2950929A DE2950929B1 (en) | 1979-12-18 | 1979-12-18 | Method for rinsing laundry washed in a program-controlled washing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0030602A1 EP0030602A1 (en) | 1981-06-24 |
EP0030602B1 true EP0030602B1 (en) | 1984-09-12 |
Family
ID=6088829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80106458A Expired EP0030602B1 (en) | 1979-12-18 | 1980-10-23 | Method and apparatus of rinsing washed laundry in a programme-controlled washing machine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0030602B1 (en) |
AT (1) | ATE9364T1 (en) |
DE (2) | DE2950929B1 (en) |
ES (1) | ES496802A0 (en) |
NO (1) | NO148383C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4232135A1 (en) * | 1992-09-25 | 1994-03-31 | Bauknecht Hausgeraete | Procedure for monitoring and controlling the program sequence of a household appliance |
EP0748892B1 (en) * | 1995-06-16 | 2001-04-04 | Merloni Elettrodomestici S.p.A. | Washing machine with device and method to control the rinsing |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0058576A1 (en) * | 1981-02-18 | 1982-08-25 | Eaton S.A.M. | Sensor arrangement for a washing machine |
DE3206563A1 (en) * | 1982-02-24 | 1983-09-01 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Control device for a washing machine |
JPS61162974A (en) * | 1985-01-09 | 1986-07-23 | シャープ株式会社 | Advance state display apparatus of washing machine |
DE3907357A1 (en) * | 1989-03-08 | 1990-09-13 | Licentia Gmbh | Method for rinsing laundry washed in a program-controlled drum-type washing machine |
DE19835319A1 (en) | 1998-08-05 | 2000-02-17 | Kuchenmeister Gmbh | Method and device for making cuts in dough pieces or other foods |
DE10042713C2 (en) * | 2000-08-31 | 2003-08-21 | Miele & Cie | Process for controlling a washing program |
ITPN20010067A1 (en) * | 2001-09-20 | 2003-03-20 | Electrolux Zanussi Elettrodome | DOMESTIC RECIRCULATING WASHING MACHINE WITH LOW WATER CONSUMPTION. |
DE10160894A1 (en) * | 2001-12-12 | 2003-07-17 | Aeg Hausgeraete Gmbh | Method and device for removing dirty water from the working area of a washing machine |
DE102007036800A1 (en) * | 2007-05-29 | 2008-12-04 | Herbert Kannegiesser Gmbh | Process for the wet treatment of laundry items |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2430668A (en) * | 1941-06-16 | 1947-11-11 | American Machine & Metals | Washing machine and automatic control mechanism therefor |
DE1410946A1 (en) * | 1960-01-19 | 1968-10-31 | Gerhard Rausch | Method for program control of an automatic washing machine |
FR1292039A (en) * | 1961-06-12 | 1962-04-27 | Laundering cycle control | |
US3114253A (en) * | 1962-09-13 | 1963-12-17 | Gen Electric | Automatic washing machine having means to measure the rate of change of turbidity |
DE1485076A1 (en) * | 1963-06-14 | 1969-05-22 | Philips Patentverwaltung | Process for the automatic determination of the amount of water required for flushing with program-controlled water machines |
DE1259827B (en) * | 1964-04-23 | 1968-02-01 | Siemens Elektrogeraete Gmbh | Washing machine or other household appliance |
JPS4918187B1 (en) * | 1968-11-15 | 1974-05-08 | ||
GB1401426A (en) * | 1971-07-08 | 1975-07-16 | Wira & Mather | Method of and apparatus for determining when a rinsing or washing process should be terminated |
US3888269A (en) * | 1973-07-17 | 1975-06-10 | Whirlpool Co | Control system for dishwasher |
FI773869A (en) * | 1977-12-20 | 1979-06-21 | Asko Upo Oy | FOERFARANDE OCH ANORDNING FOER STYRNING AV SKOELJNINGEN I EN TVAETTMASKIN |
-
1979
- 1979-12-18 DE DE2950929A patent/DE2950929B1/en not_active Ceased
-
1980
- 1980-10-23 EP EP80106458A patent/EP0030602B1/en not_active Expired
- 1980-10-23 AT AT80106458T patent/ATE9364T1/en not_active IP Right Cessation
- 1980-10-23 DE DE8080106458T patent/DE3069174D1/en not_active Expired
- 1980-11-13 ES ES496802A patent/ES496802A0/en active Granted
- 1980-12-17 NO NO803841A patent/NO148383C/en unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4232135A1 (en) * | 1992-09-25 | 1994-03-31 | Bauknecht Hausgeraete | Procedure for monitoring and controlling the program sequence of a household appliance |
DE4244783C2 (en) * | 1992-09-25 | 1997-01-16 | Bauknecht Hausgeraete | Procedure for monitoring and controlling the program sequence in a household appliance with several rinse cycles |
DE4244783C5 (en) * | 1992-09-25 | 2007-02-15 | Bauknecht Hausgeräte GmbH | Method for monitoring and controlling the program sequence in a domestic appliance with several rinses |
EP0748892B1 (en) * | 1995-06-16 | 2001-04-04 | Merloni Elettrodomestici S.p.A. | Washing machine with device and method to control the rinsing |
Also Published As
Publication number | Publication date |
---|---|
ES8202078A1 (en) | 1982-01-01 |
EP0030602A1 (en) | 1981-06-24 |
DE2950929B1 (en) | 1981-04-16 |
NO148383C (en) | 1983-09-28 |
ATE9364T1 (en) | 1984-09-15 |
NO148383B (en) | 1983-06-20 |
ES496802A0 (en) | 1982-01-01 |
DE3069174D1 (en) | 1984-10-18 |
NO803841L (en) | 1981-06-19 |
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