EP2133455A1 - Method and device for detecting foam in a washing machine - Google Patents
Method and device for detecting foam in a washing machine Download PDFInfo
- Publication number
- EP2133455A1 EP2133455A1 EP09100323A EP09100323A EP2133455A1 EP 2133455 A1 EP2133455 A1 EP 2133455A1 EP 09100323 A EP09100323 A EP 09100323A EP 09100323 A EP09100323 A EP 09100323A EP 2133455 A1 EP2133455 A1 EP 2133455A1
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- EP
- European Patent Office
- Prior art keywords
- electrodes
- washing machine
- tub
- foam
- washing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- D06F2105/02—Water supply
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/42—Detergent or additive supply
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- 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
- D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
-
- 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
Definitions
- the invention relates to a method for determining a foam which forms within the washing liquid of a washing machine forming a washing tub using electrodes and to a washing machine having means for carrying out the method.
- DE 101 35 191 A1 also acknowledges a number of prior art, including turbidity sensors as recognition devices for foam ( DE 198 48 248 A1 ) or even on reflections of the lye surface reactive optical sensors ( DE 43 42 272 A1 ) are located. Despite many of the described disadvantages of such systems also uses in DE 101 35 191 A1 described method, a turbidity sensor to expand the possibilities of process monitoring in a washing machine with its use.
- the invention has for its object, especially during a wetting or at the beginning of a wash cycle of a laundry treatment process to recognize the formation of foam in time that measures to prevent - not only for elimination - can be made of harmful foaming before the washing mechanics over long stretches of the treatment process is already impaired.
- this object is achieved by a method described above, in which according to the characterizing part of claim 1 to the electrodes, a measuring voltage is applied, the electric field between the electrodes is determined and the size of the electric field is assigned a measure of the amount of foam.
- a washing machine in which such a method can be carried out, is advantageously characterized in that the electrodes are arranged in a region of the tub of the washing machine, which is known by an intense presence of any resulting foam bubbles.
- Such areas are preferably located in the vicinity of the attached to the bottom of the tub heaters at a low height above them, so that the area of the tub is located according to a further advantageous embodiment, slightly above the lowest point of the tub.
- foam bubbles which are formed directly on the hot heating rods can preferably pass between the electrodes of the measuring arrangement. There, they change the electric field so significantly that this change is available for reliable measurement evaluation.
- the electrodes preferably have such a small mutual distance that only a few foam bubbles (eg only one or two) fit into the spacer space. Then, the change in the electric field between the electrodes compared to the state with completely bubble-free filling of the distance space can amount to a whole or even more than an order of magnitude of the measured variable.
- the washing machine according to the invention can be equipped at the lower end of the distance space of the electrodes with a drogue. Then the guarantee to catch the resulting bubbles at a very early stage is given most likely.
- FIG. 1 The diagram shown on the abscissa shows the time t of the laundry treatment process and on the ordinate axis the values for the drum rotation number (diagram line N), the resulting pressure of the liquor P o in the tub and the conductance G o of the liquor, each measured on a mounted in the tub Measuring arrangement completely without foaming.
- the laundry treatment process is divided into essentially four sections: wetting B, washing W, rinsing R and spinning S.
- wetting section B fresh water and detergent are supplied and the laundry drum is driven at a low speed of, for example, 25 rpm.
- the pressure P in the tub first increases according to the filled amount of water and then reduces (here simplified) within several stages to a constant pressure P o , which is also observed in the washing W section.
- the conductance G of the liquor initially increased rapidly, because almost all the supplied amount of detergent collects in the vicinity of the measuring assembly, while distributing in the course of wetting section B in the entire liquor. Even within the wetting section B, however, the conductance G increases again, because initially not the entire amount of detergent was dissolved, which now happens in section B.
- the conductance G also continues to rise during the washing section W, because the dissolution process still continues until the conductance has finally reached approximately a value G o , after the temperature of the liquor (not shown here) has reached the maximum value and towards the end of the Section W falls slightly again.
- the development of the conductance G o follows the temperature development approximately.
- the laundry drum is driven at a speed of about 55 rpm. Usually drive breaks and reversals of the laundry drum are not considered here.
- the representation in Fig. 1 is an idealized representation in the event that no foam forms.
- a rinsing section R follows, in which first the liquor is pumped out and the laundry is thrown over (increase in the drum speed!). For subsequent rinsing the laundry water is added again, then pumped out again, etc. until the rinsing section is ended.
- the laundry drum accelerates to high speeds of more than 400 rpm, with considerable amounts of lye initially bound in the laundry being thrown off and being pumped out of the tub. Consequently, the graph lines for the conductance G, the lye pressure P and finally also the speed N decrease towards zero.
- FIG. 2 The diagram shown is a corresponding Fig. 1 ongoing laundry treatment process shown in which a normal foam situation exists. That is, the laundry detergent used has a common tendency to foam when a laundry of average mesh and fabric type is used and washed in a standard 60 ° program.
- P S and conductance G S For comparison with the parameters influenced by foaming pressure P S and conductance G S are in the diagram of the Fig. 2 also the comparable diagram lines G o and P o registered without foam.
- the washing machine shown therein houses in its housing 1 a tub 2 with an internal laundry drum 3.
- the bottom drain 4 of the tub 2 is also regularly the place where the Laugentik P is measured in the tub 2 (not shown here). He is connected via a drain pump 5 with the drain line 6, to carry over this the spent liquor from the washing machine.
- a measuring arrangement 14 is mounted, which accommodates within a channel-like housing 15 two electrodes 16, whose spacing can be flooded by the liquor 17 from bottom to top.
- the position of the disproportionately large measuring arrangement 14 shown here is the better recognizability because of left next to the laundry drum 3 indicated. However, since the measuring assembly 14 can actually be made substantially smaller, is their attachment in the tub 2 further in the vicinity of the radiator 20 possible and recommended.
- the electrodes 16 are connected via lines 18 to an evaluation device, not shown, where the measured variable of the electric field formed between the electrodes 16 can be converted into a process measure.
- the housing 15 has a drogue 21 at the lower end of its channel.
- FIG. 3 illustrated embodiment is not a restriction of the invention.
- the representation of the measuring arrangement 14 is to be evaluated only as a principle.
- the method according to the invention also covers the framework for the means for carrying out the method.
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Bestimmen eines innerhalb der in einem Laugenbehälter befindlichen Waschflüssigkeit einer Waschmaschine sich bildenden Schaums unter Einsatz von Elektroden und eine Waschmaschine mit Einrichtungen zur Durchführung des Verfahrens.The invention relates to a method for determining a foam which forms within the washing liquid of a washing machine forming a washing tub using electrodes and to a washing machine having means for carrying out the method.
Zum Bestimmen von Schaum, der sich während der Nassbehandlung insbesondere unter Einwirkung von Waschmitteln innerhalb der Waschflüssigkeit - fortan als Lauge bezeichnet - bildet und insbesondere unter der Einwirkung von Wärme und intensiver Bewegung der Lauge, vor allem unter der Bewegung durch eine im Laugebehälter rotierende Wäschetrommel, sind in der Vergangenheit zahlreiche Verfahren und Einrichtungen bekannt geworden. So schlägt beispielsweise
In
(
(
Schließlich wird bei der Beschreibung eines in
Der Erfindung liegt die Aufgabe zugrunde, vor allem während eines Benetzungs- oder am Beginn eines Waschganges eines Wäschebehandlungsprozesses die Bildung von Schaum so rechtzeitig zu erkennen, dass Maßnahmen zur Verhinderung - nicht erst zur Beseitigung - von schädlicher Schaumbildung getroffen werden können, ehe die Waschmechanik über weite Strecken des Behandlungsprozesses bereits beeinträchtigt wird.The invention has for its object, especially during a wetting or at the beginning of a wash cycle of a laundry treatment process to recognize the formation of foam in time that measures to prevent - not only for elimination - can be made of harmful foaming before the washing mechanics over long stretches of the treatment process is already impaired.
Erfindungsgemäß wird diese Aufgabe durch ein eingangs beschriebenes Verfahren gelöst, bei dem gemäß Kennzeichen des Anspruches 1 an die Elektroden eine Messspannung angelegt wird, das elektrische Feld zwischen den Elektroden bestimmt wird und der Größe des elektrischen Feldes ein Maß für die Menge des Schaums zugeordnet wird. Ein solches Verfahren kann die Entstehung von Schaum beim Waschprozess so frühzeitig erkennbar machen, dass daraufhin eingeleitete Maßnahmen zur Beseitigung der Schaumentstehung bereits greifen, ehe Schaum in einer den Behandlungsprozess störenden Menge entstanden ist.According to the invention this object is achieved by a method described above, in which according to the characterizing part of
Eine Waschmaschine, in der ein solches Verfahren durchgeführt werden kann, ist vorteilhafterweise dadurch gekennzeichnet, dass die Elektroden in einem Bereich des Laugenbehälters der Waschmaschine angeordnet sind, der durch eine intensive Gegenwart von allfällig entstehenden Schaumblasen bekannt ist. Solche Bereiche finden sich vorzugsweise in der Nähe der am Boden des Laugenbehälters angebrachten Heizstäbe in geringer Höhe über ihnen, so dass der Bereich des Laugenbehälters gemäß einer weiteren vorteilhaften Ausbildung wenig oberhalb des tiefsten Punktes des Laugenbehälters lokalisiert ist. So können vorzugsweise unmittelbar an den heißen Heizstäben entstehende Schaumbläschen zwischen den Elektroden der Messanordnung vorbeistreichen. Dort verändern sie das elektrische Feld so signifikant, dass diese Veränderung einer sicheren Messauswertung zur Verfügung steht.A washing machine, in which such a method can be carried out, is advantageously characterized in that the electrodes are arranged in a region of the tub of the washing machine, which is known by an intense presence of any resulting foam bubbles. Such areas are preferably located in the vicinity of the attached to the bottom of the tub heaters at a low height above them, so that the area of the tub is located according to a further advantageous embodiment, slightly above the lowest point of the tub. For example, foam bubbles which are formed directly on the hot heating rods can preferably pass between the electrodes of the measuring arrangement. There, they change the electric field so significantly that this change is available for reliable measurement evaluation.
Vorzugsweise weisen die Elektroden einen so geringen zueinander Abstand auf, dass nur wenige Schaumblasen (z. B. nur eine oder zwei) in den Abstandsraum passen. Dann kann die Veränderung des elektrischen Feldes zwischen den Elektroden gegenüber dem Zustand mit vollständig blasenfreier Füllung des Abstandsraumes eine ganze oder sogar mehr als eine Größenordnung der Messgröße betragen.The electrodes preferably have such a small mutual distance that only a few foam bubbles (eg only one or two) fit into the spacer space. Then, the change in the electric field between the electrodes compared to the state with completely bubble-free filling of the distance space can amount to a whole or even more than an order of magnitude of the measured variable.
In besonders vorteilhafter Weise kann die erfindungsgemäße Waschmaschine am unteren Ende des Abstandsraums der Elektroden mit einem Fangtrichter ausgestattet sein. Dann ist die Gewähr, entstandene Blasen sehr frühzeitig aufzufangen, am ehesten gegeben.In a particularly advantageous manner, the washing machine according to the invention can be equipped at the lower end of the distance space of the electrodes with a drogue. Then the guarantee to catch the resulting bubbles at a very early stage is given most likely.
Merkmale der Unteransprüche können in beliebiger Kombination miteinander und mit denen der Hauptansprüche kombiniert werden, ohne die Erfindung zu verlassen.Features of the subclaims can be combined in any combination with each other and with those of the main claims, without departing from the invention.
Anhand des in der Zeichnung dargestellten Verfahrens und eines Ausführungsbeispiels zur Durchführung des Verfahrens ist die Erfindung nachstehend näher erläutert. Es zeigen
- Fig. 1
- für die Erfindung wesentliche Züge eines Waschprozesses ohne Schaumbildung,
- Fig. 2
- die Vorteile der Eingriffzeitpunkte des erfindungsgemäßen Verfahrens anhand eines entsprechenden Waschprozesses mit Schaumbildung und
- Fig. 3
- eine mit einer erfindungsgemäßen Messanordnung ausgestatteten Waschmaschine in seitlicher Durchsicht durch den Laugenbehälter.
- Fig. 1
- essential features of the invention of a washing process without foaming,
- Fig. 2
- the advantages of the intervention times of the method according to the invention with reference to a corresponding washing process with foaming and
- Fig. 3
- a washing machine equipped with a measuring arrangement according to the invention in a lateral view through the tub.
Das in
Der Wäschebehandlungsprozess gliedert sich in im Wesentlichen vier Abschnitte: Benetzen B, Waschen W, Spülen R und Schleudern S. Im Abschnitt Benetzen B werden Frischwasser und Waschmittel zugeführt und die Wäschetrommel mit einer kleinen Drehzahl von beispielsweise 25 Upm angetrieben. Während dieses Abschnitts steigt der Druck P im Laugenbehälter zunächst entsprechend der eingefüllten Wassermenge und reduziert sich dann (hier vereinfacht dargestellt) innerhalb mehrerer Stufen auf einen gleich bleibenden Druck Po, der auch im Abschnitt Waschen W eingehalten wird. Durch die gleichzeitige Befüllung mit der aus einer Waschmitteleinspüleinrichtung vorgehaltenen Menge Waschmittel erhöht sich der Leitwert G der Lauge zunächst rasant, weil fast die gesamte zugeführte Waschmittelmenge sich in der Nähe der Messanordnung sammelt, während sie sich im Laufe des Benetzungsabschnitts B in der gesamten Lauge verteilt. Schon innerhalb des Benetzungsabschnitts B steigt aber der Leitwert G wieder an, weil zunächst nicht die gesamte Waschmittelmenge gelöst war, was nun im Abschnitt B aber geschieht.The laundry treatment process is divided into essentially four sections: wetting B, washing W, rinsing R and spinning S. In the wetting section B, fresh water and detergent are supplied and the laundry drum is driven at a low speed of, for example, 25 rpm. During this section, the pressure P in the tub first increases according to the filled amount of water and then reduces (here simplified) within several stages to a constant pressure P o , which is also observed in the washing W section. By the simultaneous filling with the held from a Waschmitteleinspüleinrichtung amount of detergent, the conductance G of the liquor initially increased rapidly, because almost all the supplied amount of detergent collects in the vicinity of the measuring assembly, while distributing in the course of wetting section B in the entire liquor. Even within the wetting section B, however, the conductance G increases again, because initially not the entire amount of detergent was dissolved, which now happens in section B.
Der Leitwert G steigt auch noch während des Waschabschnitts W weiter an, weil der Lösungsvorgang immer noch andauert, bis der Leitwert schließlich ungefähr einen Wert Go angenommen hat, nachdem die Temperatur der Lauge (hier nicht dargestellt) den Maximalwert erreicht hat und gegen Ende des Abschnitts W wieder leicht fällt. Die Entwicklung des Leitwerts Go folgt der Temperaturentwicklung in etwa. Im Abschnitt W wird die Wäschetrommel mit einer Drehzahl von ca. 55 Upm angetrieben. Üblich Antriebspausen und Reversierungen der Wäschetrommel sind hier nicht berücksichtigt. Die Darstellung in
Nach dem Waschabschnitt W folgt ein Spülabschnitt R, in dem zunächst die Lauge abgepumpt und die Wäsche vorgeschleudert wird (Anstieg der Trommeldrehzahl!). Zum anschließenden Spülen der Wäsche wird wieder Wasser hinzugeführt, danach wieder abgepumpt usw. bis der Spülabschnitt beendet wird. Im anschließenden Schleuderabschnitt S beschleunigt die Wäschetrommel auf hohe Drehzahlen über 400 Upm, wobei noch erhebliche Mengen von in der Wäsche zunächst gebundener Lauge abgeschleudert und aus dem Laugenbehälter abgepumpt werden. Folglich senken sich die Diagrammlinien für den Leitwert G, den Laugendruck P und schließlich auch die Drehzahl N gegen Null.After the washing section W, a rinsing section R follows, in which first the liquor is pumped out and the laundry is thrown over (increase in the drum speed!). For subsequent rinsing the laundry water is added again, then pumped out again, etc. until the rinsing section is ended. In the subsequent spin section S, the laundry drum accelerates to high speeds of more than 400 rpm, with considerable amounts of lye initially bound in the laundry being thrown off and being pumped out of the tub. Consequently, the graph lines for the conductance G, the lye pressure P and finally also the speed N decrease towards zero.
Bei dem durch
Zunächst verläuft im Abschnitt B alles so wie im Diagramm der
Noch innerhalb des Abschnitts B kann daher (hier zum Zeitpunkt t1) eine Schaumbildung erkannt werden, indem die Differenz ΔGB zum schaumlosen Messwert Go wahrgenommen wird. Man kann deutlich erkennen, dass eine bekannte Messmethode, die den Druck P im Laugenbehälter beobachtet an dieser Stelle versagen würde; denn eine wahrnehmbare Erhöhung des Drucks aufgrund von Schaumbildung zu diesem Zeitpunkt ist nicht vorhanden. Selbst eine optische Messung von Schaumbläschen würde hier noch versagen, weil die hier vorhandenen kleinsten Schaumbläschen die Lauge kaum trüben würden. Eine wahrnehmbare Veränderung des elektrischen Feldes zwischen zwei Elektroden tritt demgegenüber aber ein, woraus ein verwertbares Signal gewonnen werden kann.Even within the section B can therefore (here at the time t 1 ) foam formation are detected by the difference .DELTA.G B to the foamless measured value G o is perceived. It can be clearly seen that a known measuring method, which observed the pressure P in the tub, would fail at this point; because there is no noticeable increase in pressure due to foaming at this time. Even an optical measurement of foam bubbles would still fail here because the smallest foam bubbles present here would scarcely cloud the liquor. A perceptible change in the electric field between two electrodes, however, occurs on the other hand, from which a usable signal can be obtained.
Zum Zeitpunkt t2, zu dem der Waschprozess im vollen Gange sein sollte, was durch Schaumbildung entsprechend der Diagrammlinie GS erheblich beeinträchtigt wird, ist eine Druckmessung immer noch recht unsicher. Dies belegt die geringe Druckdifferenz zwischen den Druckwerten ohne und mit Schaumbildung an dem Schnittpunkt WS, die sogar noch geringer ist als die Leitwertdifferenz ΔGB zum Zeitpunkt t1.Demgegenüber ist die Leitwertdifferenz ΔGW zum Zeitpunkt t2 so groß, dass eine Ableitung einer Reaktionsmaßnahme nicht die geringste Schwierigkeit darstellen würde. Zu einer solchen Maßnahme bestünde zu diesem Zeitpunkt aber gar kein Anlass mehr, weil die bereits genügend große Leitwertdifferenz ΔGB im Abschnitt B schon zu einer Schaum reduzierenden Maßnahme geführt hätte und demzufolge zum Zeitpunkt t2 keine störende Schaumbildung mehr zu erwarten ist.At time t 2 , at which the washing process should be in full swing, which is significantly affected by foaming according to the graph line G S , a pressure measurement is still rather uncertain. This is evidenced by the low pressure difference between the pressure values without and with foaming at the intersection point W S , which is even lower than the conductance difference ΔG B at time t 1. In contrast, the conductance difference ΔG W at time t 2 is so great that a derivative of a Reaction would not pose the slightest difficulty. At this point in time, however, there would no longer be any reason for such a measure because the already sufficiently large conductance difference ΔG B in section B would have already led to a foam-reducing measure and consequently no disturbing foam formation would be expected at time t 2 .
Aus den vorstehenden Erläuterungen ist die deutliche Überlegenheit des erfindungsgemäßen Bestimmungsverfahrens gegenüber den bekannten Messmethoden zu erkennen. Sie ist auch einfach zu realisieren, wie anhand von
Zur Zuführung von Frischwasser und Waschmittel 19 dient eine oben im Laugenbehälter 2 angeordnete Öffnung 7 einer Waschmitteleinspülschale 8, der das Frischwasser über den Netzanschluss 9, die Ventile 10 und 11 sowie die Verteilungsrohre 12 zugeführt wird.For the supply of fresh water and
Im Bodenbereich 13 des Laugenbehälters 2 sind Heizkörper 20 zur Erwärmung der Lauge 17 vorgesehen. Darüber ist eine Messanordnung 14 angebracht, die innerhalb eines kanalartigen Gehäuses 15 zwei Elektroden 16 beherbergt, deren Abstandsraum von der Lauge 17 von unten nach oben durchflutet werden kann.In the
Die Position der überproportional groß dargestellten Messanordnung 14 ist hier der besseren Erkennbarkeit wegen links neben der Wäschetrommel 3 angegeben. Da die Messanordnung 14 tatsächlich jedoch wesentlich kleiner gestaltet werden kann, ist ihre Anbringung im Laugenbehälter 2 weiter in der Nähe der Heizkörper 20 möglich und empfehlenswert.The position of the disproportionately
Die Elektroden 16 sind über Leitungen 18 an eine nicht dargestellte Auswerteeinrichtung angeschlossen, wo die Messgröße des zwischen den Elektroden 16 sich ausbildenden elektrischen Feldes zu einer Prozessmaßnahme umgewandelt werden kann. Damit möglichst viele frühzeitig sich entwickelnde, kleinste Schaumblasen für die Messstrecke im Abstandsraum zwischen den Elektroden 16 eingefangen werden können, hat das Gehäuse 15 am unteren Ende seines Kanals einen Fangtrichter 21.The
Das in
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008028030A DE102008028030A1 (en) | 2008-06-12 | 2008-06-12 | Method and device for determining foam in a washing machine |
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Publication Number | Publication Date |
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EP2133455A1 true EP2133455A1 (en) | 2009-12-16 |
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EP09100323A Ceased EP2133455A1 (en) | 2008-06-12 | 2009-06-08 | Method and device for detecting foam in a washing machine |
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EP (1) | EP2133455A1 (en) |
CN (1) | CN101608391B (en) |
DE (1) | DE102008028030A1 (en) |
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WO2012089471A1 (en) * | 2010-12-29 | 2012-07-05 | Arcelik Anonim Sirketi | A washer comprising a conductivity and temperature sensor |
CN114098582A (en) * | 2021-11-18 | 2022-03-01 | 瀚乐电子机械(南京)有限公司 | System and method for detecting amount of foam in household appliance |
WO2023128971A1 (en) * | 2021-12-29 | 2023-07-06 | Arcelik Anonim Sirketi | A washing machine |
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DE102015205945A1 (en) | 2015-04-01 | 2016-10-06 | BSH Hausgeräte GmbH | Method for operating a washing machine with foam detection by a drum speed evaluation and this suitable washing machine |
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DE102016201450B3 (en) * | 2016-02-01 | 2017-02-09 | BSH Hausgeräte GmbH | Laundry care device with a foam detection device |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101994238A (en) * | 2009-08-25 | 2011-03-30 | 松下电器产业株式会社 | Washing machine |
CN101994238B (en) * | 2009-08-25 | 2015-01-07 | 松下电器产业株式会社 | Washing machine |
WO2012089471A1 (en) * | 2010-12-29 | 2012-07-05 | Arcelik Anonim Sirketi | A washer comprising a conductivity and temperature sensor |
CN114098582A (en) * | 2021-11-18 | 2022-03-01 | 瀚乐电子机械(南京)有限公司 | System and method for detecting amount of foam in household appliance |
WO2023128971A1 (en) * | 2021-12-29 | 2023-07-06 | Arcelik Anonim Sirketi | A washing machine |
Also Published As
Publication number | Publication date |
---|---|
CN101608391B (en) | 2012-07-25 |
CN101608391A (en) | 2009-12-23 |
DE102008028030A1 (en) | 2009-12-24 |
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