EP1208790A2 - Dishwasher provided with a device for impeding the accumulation of air bubbles and foam in the measurement area of a turbidity sensor - Google Patents
Dishwasher provided with a device for impeding the accumulation of air bubbles and foam in the measurement area of a turbidity sensor Download PDFInfo
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- EP1208790A2 EP1208790A2 EP01125828A EP01125828A EP1208790A2 EP 1208790 A2 EP1208790 A2 EP 1208790A2 EP 01125828 A EP01125828 A EP 01125828A EP 01125828 A EP01125828 A EP 01125828A EP 1208790 A2 EP1208790 A2 EP 1208790A2
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- measuring zone
- turbidity sensor
- dishwasher according
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
Definitions
- Dishwasher with a device for preventing foam or air bubble accumulation in the measuring zone of a turbidity sensor
- the invention relates to a dishwasher with a device for preventing Foam or air bubbles accumulate in the flow-reduced measuring zone in the flushing water circuit arranged turbidity sensor.
- the invention has for its object a foam or air bubbles in the To prevent rinsing liquid in the area of the measuring zone of the turbidity sensor.
- the invention advantageously separates foam and / or air bubbles from the Turbidity liquid to be sensed in the area of the measuring zone of the optical sensor possible. This significantly simplifies the signal evaluation, whereby the measurement path of the optical sensor "floating" particles, each for a short moment the light of the Absorb optics, actually only recognized as signal jumps by dirt particles, filtered out and can be converted into usable signals.
- the digitized signal jumps can then through the computer's electronic device program control for program control of the dishwasher with regard to the respectively determined
- the type and amount of contamination can be precisely evaluated without being in the rinsing liquid transported foam or air bubbles can influence it.
- the invention is based on an electronically program-controlled dishwasher (1), whose manually or automatically selectable wash programs each have program sections, such as Have pre-rinse, clean, rinse and rinse, depending on what is found Degree of soiling of the dishes or dishwashing liquid loaded into the machine Pre-rinse and / or intermediate rinse cycles can be controlled or additionally controlled.
- program sections such as Have pre-rinse, clean, rinse and rinse, depending on what is found Degree of soiling of the dishes or dishwashing liquid loaded into the machine Pre-rinse and / or intermediate rinse cycles can be controlled or additionally controlled.
- To The final rinse program section is regularly followed by a program section Drying.
- Such dishwashers belong to the general state of the art and essentially have components and accessories, as shown in Fig. 1 in the Household appliance is shown in simplified form.
- the program control (P) of the device shown in the block diagram is for the sake of clarity been waived.
- the (1) designated and schematically shown front-loading household dishwasher has a rinsing tank (2) and several spray arms (3, 4, 5), which over and between crockery baskets (6, 7) and a separate cutlery basket (8) in different Wash levels are arranged in the wash tank (2).
- the spray arms (3, 4, 5) are assigned via Supply lines (11, 12) from the circulating rinsing liquid of an upstream circulation pump (9) fed, the rinsing liquid in the rinsing mode constantly via a filter screen combination (10) is guided out of a fine sieve arranged in the bottom of the washing compartment as well as a coarse sieve and a fine sieve. There are leftovers from the Filtered out rinsing liquid (17).
- the cutlery basket (8) is designed as a cutlery drawer and in a washing level separated from the crockery baskets (6, 7) above the two one above the other lying separate crockery baskets (6, 7) in the washing compartment (2) with their own spray arm (5) arranged.
- the supplied to the washing container (2) for dishwashing via a fresh water connection (15)
- the amount of washing liquid is largely dependent on the amount of dishes to be cleaned controlled dependent.
- flushing water quantities to be supplied in the flushing operation or change of liquid also depends on the soiling of the dishes.
- rinsing water contamination for example from not or only dirt particles that are difficult to dissolve, such as spinach residues or the like "swim", touch, negatively affect the washing result.
- the dishwasher (1) has an optical sensor in the form of a known turbidity sensor (13), which is connected to the program control (P) to predetermined Points in time in the aforementioned program sections, such as pre-rinsing, cleaning and / or Intermediate rinsing, for example after fresh water has been fed into the rinsing container (2) determines the turbidity of the moving rinsing liquid and the determined degree of contamination provides the corresponding measurement signal.
- a known turbidity sensor 13
- P program control
- the turbidity sensor (13) is advantageous in the feed line to form the calmed measuring section (12) to the upper spray arm (5).
- the calmed measuring zone (14) can also in the feed line to another spray arm (3 or 4) of the dishwasher (1) be installed.
- the measurement zone (14) may also be arranged in a bypass or in parallel Side path to a spray arm feed line (11 or 12), in which only a small part of the Flushing liquid (16) flows calmly, advantageously.
- the Cross-sectional enlargement in the flow direction of the rinsing liquid (16) calms the liquid flow.
- the measuring zone (14) combines a calm flow with one Foam or air bubble separator.
- the enlarged flow cross-section is compared to a horizontal plane (14a) of the measuring zone (14) increasingly increasing line course (line path 14b) for the Flushing liquid (16) formed.
- the air bubbles (17) collect in this line path (14b) thus above or outside the measuring range of the turbidity sensor (13). This ensures that the pure liquid transport in the plane (Eu) of the measuring zone and the air or Foam bubble transport takes place in the upper level (Eo) of the device (13, 14).
- the Turbidity sensor (13) can thus optimally detect the actual degree of contamination.
- the cross-sectional shape of the measuring zone (14) is preferably approximately trapezoidal, the turbidity sensor (13) in the area of the largest cross-sectional expansion in the lower one Level (Eu or floor area 14a) of the measuring zone (14) is arranged.
- the one described Measuring zone (14) can be easily manufactured and assembled as a separate plastic injection molded part.
- the calmed measuring zone (14) can, however, also in a horizontal conduit (12) Spray arm supply in the lower area of the device or in the water pipe (11; 12) or be arranged behind a speed-adjustable circulation pump (9).
- a speed controlled Circulation pump (9) advantageously causes a particularly calm at low speed Flow in front of the turbidity sensor (13).
- the device described here for a program-controlled dishwasher is equally applicable to a washing machine that can be controlled by a device program.
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- Washing And Drying Of Tableware (AREA)
- Optical Measuring Cells (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Bei einer Geschirrspülmaschine mit einer Einrichtung zur Verhinderung einer Schaum- oder Luftblasenansammlung in der strömungsberuhigten Messzone (14) eines im Spülwasserkreislauf angeordneten Trübungssensors (13) ist die Messzone mit dem Trübungssensor in einem waagerecht verlaufenden Leitungsweg der Spülflüssigkeit angeordnet, welcher gegenüber der vorgeschalteten Zuleitung (12) einen sich stetig vergrößernden Strömungsquerschnitt besitzt. Eine solche Ausbildung der Messzone ermöglicht vorteilhaft eine Trennung von Schaum und/oder Luftblasen (17) aus der auf Trübung zu sensierenden Spülflüssigkeit (16) und vereinfacht die Signalauswertung. Die durch die Mess-Strecke des optischen Sensors "schwimmenden" Partikel, die für kurze Augenblicke jeweils das Licht der Optik absorbieren, werden auch tatsächlich nur als Signalsprünge von Schmutzpartikeln erkannt, herausgefiltert und in verwertbare Signale umgewandelt. <IMAGE>In a dishwasher with a device for preventing foam or air bubbles from accumulating in the flow-reduced measuring zone (14) of a turbidity sensor (13) arranged in the rinsing water circuit, the measuring zone with the turbidity sensor is arranged in a horizontal conduit path of the rinsing liquid, which is opposite the upstream feed line (12 ) has a steadily increasing flow cross-section. Such a design of the measuring zone advantageously enables foam and / or air bubbles (17) to be separated from the rinsing liquid (16) to be detected for turbidity and simplifies signal evaluation. The particles "floating" through the measuring section of the optical sensor, each of which absorbs the light from the optics for a brief moment, are actually only recognized as signal jumps by dirt particles, filtered out and converted into usable signals. <IMAGE>
Description
Geschirrspülmaschine mit einer Einrichtung zur Verhinderung einer Schaum- oder Luftblasenansammlung in der Messzone eines TrübungssensorsDishwasher with a device for preventing foam or air bubble accumulation in the measuring zone of a turbidity sensor
Die Erfindung betrifft eine Geschirrspülmaschine mit einer Einrichtung zur Verhinderung einer Schaum- oder Luftblasenansammlung in der strömungsberuhigten Messzone eines im Spülwasserkreislauf angeordneten Trübungssensors.The invention relates to a dishwasher with a device for preventing Foam or air bubbles accumulate in the flow-reduced measuring zone in the flushing water circuit arranged turbidity sensor.
Bei programmgesteuerten Geschirrspülmaschinen, welche zur Optimierung des Spülprogrammlaufs Trübungssensoren einsetzen, besteht das Problem, dass sowohl in der Spülflüssigkeit schwimmende Schmutzpartikel als auch durch abgelöste Speisereste verursachte Schaum- und Luftblasen die Messstrecke des Sensors durchwandern, wobei entsprechend den Verunreinigungen und Luftbeimengungen der Spülflüssigkeit verrauschte analoge Mess-Signale von mehr oder weniger hohen Spannungspegeln am Ausgang des Lichtempfängers erzeugt werden. Die verrauschten Mess-Signale kennzeichnen den jeweiligen Grad der Verschmutzung der Spülflüssigkeit, werden aber gravierend durch den mittransportierten Blasenund/oder Schaumanteil verfälscht. Dies erschwert eine dem tatsächlichen Laugenverschmutzungsgrad entsprechende digitale Signalaufbereitung zur Steuerung des Spülprozesses. Zur Lösung dieses Problems wurde bereits vorgeschlagen, die umlaufende Spülflüssigkeit innerhalb der Messzone strömungsberuhigt zu transportieren.For program-controlled dishwashers, which are used to optimize the washing program run Using turbidity sensors, there is the problem that both in the rinsing liquid floating dirt particles as well as caused by detached food residues Foam and air bubbles travel through the measuring section of the sensor Contamination and air admixtures in the rinsing liquid noisy analog measurement signals of more or less high voltage levels at the output of the light receiver be generated. The noisy measurement signals indicate the degree of contamination the rinsing liquid, but become serious due to the bubbles and / or Foam content adulterated. This complicates the actual degree of lye pollution Corresponding digital signal processing to control the washing process. to Solution to this problem has already been suggested, the circulating irrigation fluid within to transport the measuring zone with reduced flow.
Der Erfindung liegt die Aufgabe zugrunde, eine Schaum- oder Luftblasenansammlung in der Spülflüssigkeit im Bereich der Messzone des Trübungssensors zu verhindern.The invention has for its object a foam or air bubbles in the To prevent rinsing liquid in the area of the measuring zone of the turbidity sensor.
Erfindungsgemäß wird diese Aufgabe mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte
Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden
Unteransprüchen.According to the invention, this object is achieved with the features of
Durch die Erfindung ist vorteilhaft eine Trennung von Schaum und/oder Luftblasen aus der auf Trübung zu sensierenden Spülflüssigkeit im Bereich der Messzone des optischen Sensors möglich. Dies vereinfacht wesentlich die Signalauswertung, wobei durch die Mess-Strecke des optischen Sensors "schwimmenden" Partikel, die für kurze Augenblicke jeweils das Licht der Optik absorbieren, auch tatsächlich nur als Signalsprünge von Schmutzpartikeln erkannt, herausgefiltert und in verwertbare Signale umgewandelt werden können. Die digitalisierten Signalsprünge können anschließend durch den Rechner der elektronischen Geräte-Programmsteuerung zur Programmlaufsteuerung der Geschirrspülmaschine hinsichtlich der jeweils ermittelten Verschmutzungsart und -menge exakt ausgewertet werden, ohne dass in der Spülflüssigkeit mittransportierte Schaum- oder Luftblasen darauf Einfluss nehmen können. The invention advantageously separates foam and / or air bubbles from the Turbidity liquid to be sensed in the area of the measuring zone of the optical sensor possible. This significantly simplifies the signal evaluation, whereby the measurement path of the optical sensor "floating" particles, each for a short moment the light of the Absorb optics, actually only recognized as signal jumps by dirt particles, filtered out and can be converted into usable signals. The digitized signal jumps can then through the computer's electronic device program control for program control of the dishwasher with regard to the respectively determined The type and amount of contamination can be precisely evaluated without being in the rinsing liquid transported foam or air bubbles can influence it.
Die Erfindung ist nachstehend anhand von Zeichnungen rein schematisch dargestellt und näher beschrieben. Es zeigt
Figur 1- eine programmgesteuerte Geschirrspülmaschine im Querschnitt mit der vereinfachten Darstellung ihrer Bauelemente und ihrem Zubehör, wobei für die Feststellung des Verschmutzungsgrades der Spülflüssigkeit ein Trübungssensor im Wasserlauf des Gerätes vorgesehen ist,
Figur 2- eine Einrichtung zur Verhinderung einer Schaum- oder Luftblasenansammlung in der Messzone des Trübungssensors,
- Figure 1
- a program-controlled dishwasher in cross section with the simplified representation of its components and accessories, a turbidity sensor being provided in the water flow of the device for determining the degree of contamination of the washing liquid,
- Figure 2
- a device for preventing foam or air bubble accumulation in the measuring zone of the turbidity sensor,
Die Erfindung geht aus von einer elektronisch programmgesteuerten Geschirrspülmaschine (1), deren manuell oder automatisch anwählbare Spülprogramme jeweils Programmabschnitte, wie Vorspülen, Reinigen, Zwischenspülen und Klarspülen aufweisen, wobei je nach festgestelltem Verschmutzungsgrad des in die Maschine geladenen Geschirrs bzw. der Spülflüssigkeit die Vorspül- und/oder Zwischenspülgänge aus- oder zusätzlich eingesteuert werden können. Nach dem letzten Programmabschnitt Klarspülen schließt sich regelmäßig ein Programmabschnitt Trocknen an. Solche Geschirrspülmaschinen gehören zum allgemeinen Stand der Technik und weisen im wesentlichen Bauelemente und Zubehör auf, wie dies in Fig. 1 bei dem gezeigten Haushaltgerät vereinfacht dargestellt ist. Auf die konkrete Darstellung der nur beispielhaft als Blockbild gezeigten Programmsteuerung (P) des Gerätes ist der besseren Übersicht halber verzichtet worden.The invention is based on an electronically program-controlled dishwasher (1), whose manually or automatically selectable wash programs each have program sections, such as Have pre-rinse, clean, rinse and rinse, depending on what is found Degree of soiling of the dishes or dishwashing liquid loaded into the machine Pre-rinse and / or intermediate rinse cycles can be controlled or additionally controlled. To The final rinse program section is regularly followed by a program section Drying. Such dishwashers belong to the general state of the art and essentially have components and accessories, as shown in Fig. 1 in the Household appliance is shown in simplified form. On the concrete presentation of the example only as The program control (P) of the device shown in the block diagram is for the sake of clarity been waived.
Die mit (1) bezeichnete und schematisch dargestellte frontseitig zu beladende Haushalt-Geschirrspülmaschine besitzt einen Spülbehälter (2) und mehrere Sprüharme (3, 4, 5), die über und zwischen Geschirrkörben (6, 7) und einem separaten Besteckkorb (8) in unterschiedlichen Spülebenen im Spülbehälter (2) angeordnet sind. Die Sprüharme (3, 4, 5) werden über zugeordnete Zuleitungen (11, 12) von der umlaufenden Spülflüssigkeit einer vorgeschalteten Umwälzpumpe (9) gespeist, wobei die Spülflüssigkeit im Spülbetrieb ständig über eine Filtersiebkombination (10) geführt wird, die aus einem im Spülbehälterboden angeordneten Feinsieb sowie aus einem Grobsieb und einem Feinstsieb besteht. Dort werden Speisereste aus der Spülflüssigkeit (17) herausgefiltert. Der Besteckkorb (8) ist als Besteckschublade ausgebildet und in einer von den Geschirrkörben (6, 7)getrennten Spülebene über den beiden übereinander liegenden separaten Geschirrkörben (6, 7) im Spülbehälter (2) mit einem eigenen Sprüharm (5) angeordnet.The (1) designated and schematically shown front-loading household dishwasher has a rinsing tank (2) and several spray arms (3, 4, 5), which over and between crockery baskets (6, 7) and a separate cutlery basket (8) in different Wash levels are arranged in the wash tank (2). The spray arms (3, 4, 5) are assigned via Supply lines (11, 12) from the circulating rinsing liquid of an upstream circulation pump (9) fed, the rinsing liquid in the rinsing mode constantly via a filter screen combination (10) is guided out of a fine sieve arranged in the bottom of the washing compartment as well as a coarse sieve and a fine sieve. There are leftovers from the Filtered out rinsing liquid (17). The cutlery basket (8) is designed as a cutlery drawer and in a washing level separated from the crockery baskets (6, 7) above the two one above the other lying separate crockery baskets (6, 7) in the washing compartment (2) with their own spray arm (5) arranged.
Die dem Spülbehälter (2) zum Geschirrspülen über einen Frischwasseranschluss (15) zugeführte Spülflüssigkeitsmenge ist weitestgehend von der Menge des zu reinigenden Geschirrs abhängig gesteuert. Darüber hinaus sind im Spülbetrieb zuzuführende Spülwassermengen oder Flüssigkeitswechsel auch von sich einstellenden Geschirrverschmutzungen abhängig. Insbesondere können sich Spülwasserverschmutzungen, die beispielsweise von nicht oder nur schwer auflösbaren Schmutzteilchen, wie Spinatreste oder ähnl., die in der Spülflüssigkeit "schwimmen", herrühren, negativ auf das Spülergebnis auswirken. Um auch solche Schmutzpartikel zu erkennen und in Abhängigkeit davon den Programmlauf automatisch zu steuern, weist die Geschirrspülmaschine (1) einen optischen Sensor in Form eines bekannten Trübungssensors (13) auf, welcher mit der Programmsteuerung (P) verbunden zu vorgegebenen Zeitpunkten in den vorerwähnten Programmabschnitten, wie Vorspülen, Reinigen und/oder Zwischenspülen, beispielsweise nach dem Zuführen von Frischwasser in den Spülbehälter (2) jeweils die Trübung der bewegten Spülflüssigkeit feststellt und ein dem ermittelten Verschmutzungsgrad entsprechendes Mess-Signal liefert. Hierfür ist der Trübungssensor (13), welcher aus einem lichtgebenden Element (Leuchtdiode LED), sowie aus einem lichtaufnehmenden Element (Fototransistor) besteht, innerhalb einer Messzone (14) angeordnet, durch welche die auf Verunreinigung zu sensierende Spülflüssigkeit (16), sh. Fig. 2, strömungsberuhigt, d. h. mit mäßiger Bewegung, geleitet wird.The supplied to the washing container (2) for dishwashing via a fresh water connection (15) The amount of washing liquid is largely dependent on the amount of dishes to be cleaned controlled dependent. In addition, flushing water quantities to be supplied in the flushing operation or change of liquid also depends on the soiling of the dishes. In particular, rinsing water contamination, for example from not or only dirt particles that are difficult to dissolve, such as spinach residues or the like "swim", touch, negatively affect the washing result. To such dirt particles to recognize and to control the program run automatically, the dishwasher (1) has an optical sensor in the form of a known turbidity sensor (13), which is connected to the program control (P) to predetermined Points in time in the aforementioned program sections, such as pre-rinsing, cleaning and / or Intermediate rinsing, for example after fresh water has been fed into the rinsing container (2) determines the turbidity of the moving rinsing liquid and the determined degree of contamination provides the corresponding measurement signal. For this, the turbidity sensor (13), which from a light-emitting element (light-emitting diode LED) and from a light-receiving element Element (phototransistor) is arranged within a measuring zone (14) through which the Flushing liquid to be sensed for contamination (16), sh. Fig. 2, calmed down, d. H. With moderate movement.
Zur Ausbildung der beruhigten Mess-Strecke ist der Trübungssensor (13) vorteilhaft in der Zuleitung (12) zum oberen Sprüharm (5) angeordnet. Die beruhigte Messzone (14) kann aber auch in der Zuleitung zu einem anderen Sprüharm (3 bzw. 4) der Geschirrspülmaschine (1) installiert werden. Auch ist ggf. die Anordnung der Messzone (14) in einem Bypass oder parallelen Nebenweg zu einer Sprüharm-Zuleitung (11 bzw. 12), in welcher nur ein geringer Teil der Spülflüssigkeit (16) beruhigt fließt, vorteilhaft.The turbidity sensor (13) is advantageous in the feed line to form the calmed measuring section (12) to the upper spray arm (5). The calmed measuring zone (14) can also in the feed line to another spray arm (3 or 4) of the dishwasher (1) be installed. The measurement zone (14) may also be arranged in a bypass or in parallel Side path to a spray arm feed line (11 or 12), in which only a small part of the Flushing liquid (16) flows calmly, advantageously.
Um sicherzustellen, dass ggf. in der umlaufenden Spülflüssigkeit (16) vorhandene Luftblasen (17) separiert und nicht als Schmutzpartikel detektiert werden können, ist die Messzone (14) mit dem Trübungssensor (13) im waagerecht verlaufenden Teil der Sprüharm-Zuleitung (12) angeordnet und besitzt gegenüber der vorgeschalteten Leitung erfindungsgemäß einen sich stetig vergrößernden Strömungsquerschnitt, wie ausführlich durch Fig. 2 dargestellt ist. Die Querschnittsvergrößerung in Strömungsrichtung der Spülflüssigkeit (16) beruhigt den Flüssigkeitsstrom. Darüber hinaus kombiniert die Messzone (14) eine beruhigte Strömung mit einem Schaum- oder Luftblasenabscheider.To ensure that any air bubbles present in the circulating rinsing liquid (16) (17) separated and cannot be detected as dirt particles, the measuring zone (14) with the turbidity sensor (13) in the horizontal part of the spray arm feed line (12) arranged and has one according to the invention compared to the upstream line steadily increasing flow cross-section, as shown in detail by Fig. 2. The Cross-sectional enlargement in the flow direction of the rinsing liquid (16) calms the liquid flow. In addition, the measuring zone (14) combines a calm flow with one Foam or air bubble separator.
Der vergrößerte Strömungsquerschnitt wird durch einen gegenüber einer horizontalen Ebene
(14a) der Messzone (14) zunehmend ansteigenden Leitungsverlauf (Leitungsweg 14b) für die
Spülflüssigkeit (16) ausgebildet. In diesem Leitungsweg (14b) sammeln sich die Luftblasen (17)
somit oberhalb bzw. außerhalb des Messbereichs des Trübungssensors (13). Hierdurch ist sichergestellt,
dass der reine Flüssigkeitstransport in der Ebene (Eu) der Messzone und der Luftoder
Schaumblasentransport in der oberen Ebene (Eo) der Einrichtung (13, 14) erfolgt. Der
Trübungssensor (13) kann somit den tatsächlichen Verschmutzungsgrad optimal erfassen. Der
Querschnittsverlauf der Messzone (14) ist vorzugsweise annähernd trapezförmig ausgebildet,
wobei der Trübungssensor (13) im Bereich der größten Querschnittserweiterung in der unteren
Ebene (Eu oder Bodenbereich 14a) der Messzone (14) angeordnet ist. Die beschriebene
Messzone (14) kann als separates Kunststoffspritzteil einfach gefertigt und montiert werden.The enlarged flow cross-section is compared to a horizontal plane
(14a) of the measuring zone (14) increasingly increasing line course (
Die beruhigte Messzone (14) kann jedoch auch in einem waagerechten Leitungsweg (12) der Sprüharmversorgung im unteren Gerätebereich oder auch im Wasserleitungsweg (11; 12) vor oder hinter einer drehzahlregelbaren Umwälzpumpe (9) angeordnet werden. Eine drehzahlgeregelte Umwälzpumpe (9) bewirkt bei niedriger Drehzahl vorteilhaft eine besonders beruhigte Strömung vor dem Trübungssensor (13).The calmed measuring zone (14) can, however, also in a horizontal conduit (12) Spray arm supply in the lower area of the device or in the water pipe (11; 12) or be arranged behind a speed-adjustable circulation pump (9). A speed controlled Circulation pump (9) advantageously causes a particularly calm at low speed Flow in front of the turbidity sensor (13).
Die hier bei einer programmgesteuerten Geschirrspülmaschine beschriebene Einrichtung ist gleichermaßen bei einer per Geräteprogramm steuerbaren Waschmaschine anwendbar.The device described here for a program-controlled dishwasher is equally applicable to a washing machine that can be controlled by a device program.
Claims (8)
dadurch gekennzeichnet, dass die Messzone (14) mit dem Trübungssensor (13) in einem waagerecht verlaufenden Leitungsweg der Spülflüssigkeit angeordnet ist und gegenüber der vorgeschalteten Zuleitung (12) einen sich stetig vergrößernden Strömungsquerschnitt besitzt.Dishwasher with a device for preventing foam or air bubbles from accumulating in the flow-reduced measuring zone of a turbidity sensor arranged in the rinsing water circuit,
characterized in that the measuring zone (14) with the turbidity sensor (13) is arranged in a horizontal conduit path of the rinsing liquid and has a continuously increasing flow cross-section compared to the upstream feed line (12).
dadurch gekennzeichnet, dass der vergrößerte Strömungsquerschnitt durch einen gegenüber einer horizontalen Ebene (Eu; 14a) der Messzone (14) zunehmend ansteigend verlaufenden Leitungsweg (14b) für die Spülflüssigkeit ausgebildet ist.Dishwasher according to claim 1,
characterized in that the enlarged flow cross-section is formed by a line path (14b) for the rinsing liquid which increases increasingly with respect to a horizontal plane (Eu; 14a) of the measuring zone (14).
dadurch gekennzeichnet, dass der Querschnittsverlauf im Strömungsweg der Spülflüssigkeit eine beruhigte Messzone (14) mit einem Luft- oder Schaumblasentransport in einer oberen Ebene (Eo) und einem davon getrennten Flüssigkeitstransport in einer darunter liegenden Ebene (Eu) bildet.Dishwasher according to claims 1 and 2,
characterized in that the cross-sectional profile in the flow path of the rinsing liquid forms a calmed measuring zone (14) with an air or foam bubble transport in an upper level (Eo) and a separate liquid transport in an underlying level (Eu).
dadurch gekennzeichnet, dass der Querschnittsverlauf der Messzone (14) annähernd trapezförmig ausgebildet ist.Dishwasher according to at least one of claims 1 to 3,
characterized in that the cross-sectional profile of the measuring zone (14) is approximately trapezoidal.
dadurch gekennzeichnet, dass der Trübungssensor (13) im Bereich der größten Querschnittserweiterung in der unteren Ebene (Eu) der Messzone (14) angeordnet ist.Dishwasher according to at least one of claims 1 to 4,
characterized in that the turbidity sensor (13) is arranged in the area of the largest cross-sectional expansion in the lower plane (Eu) of the measuring zone (14).
dadurch gekennzeichnet, dass die beruhigte Messzone (14) in einem parallelgeschalteten Nebenweg einer Spülwasserzuleitung (11 bzw. 12) angeordnet ist.Dishwasher according to at least one of claims 1 to 5,
characterized in that the calmed measuring zone (14) is arranged in a parallel side path of a rinse water supply line (11 or 12).
dadurch gekennzeichnet, dass die beruhigte Messzone (14) in einem waagerechten Leitungsweg (12) der Sprüharmversorgung im unteren Gerätebereich angeordnet ist. Dishwasher according to at least one of claims 1 to 6,
characterized in that the calmed measuring zone (14) is arranged in a horizontal line path (12) of the spray arm supply in the lower area of the device.
dadurch gekennzeichnet, dass die beruhigte Messzone (14) im Wasserleitungsweg (11; 12) vor oder hinter einer drehzahlregelbaren Umwälzpumpe (9) ausgebildet ist.Dishwasher according to at least one of claims 1 to 7,
characterized in that the calmed measuring zone (14) is formed in the water pipe path (11; 12) in front of or behind a speed-adjustable circulation pump (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10059112 | 2000-11-28 | ||
| DE10059112A DE10059112C1 (en) | 2000-11-28 | 2000-11-28 | Electric dishwashing machine has turbidity sensor measuring zone provided with gradually increasing flow cross-section for preventing collection of foam or air bubbles |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1208790A2 true EP1208790A2 (en) | 2002-05-29 |
| EP1208790A3 EP1208790A3 (en) | 2005-03-02 |
| EP1208790B1 EP1208790B1 (en) | 2006-10-25 |
Family
ID=7665013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01125828A Expired - Lifetime EP1208790B1 (en) | 2000-11-28 | 2001-10-30 | Dishwasher provided with a device for impeding the accumulation of air bubbles and foam in the measurement area of a turbidity sensor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7246625B2 (en) |
| EP (1) | EP1208790B1 (en) |
| AT (1) | ATE343344T1 (en) |
| DE (2) | DE10059112C1 (en) |
| ES (1) | ES2272395T3 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1297780A2 (en) * | 2001-09-21 | 2003-04-02 | Miele & Cie. GmbH & Co. | Device with a turbidity sensor for a dishwasher or a washing machine |
| EP1472967A2 (en) * | 2003-04-29 | 2004-11-03 | Miele & Cie. KG | Device with a turbidity sensor for a dishwasher or a washing machine |
| US20090028700A1 (en) * | 2007-07-23 | 2009-01-29 | Clinton Coker | Appliance pump |
| DE102008020475A1 (en) | 2008-04-23 | 2009-11-05 | Miele & Cie. Kg | Rinse cycle executing method for program-controlled household dishwasher, involves draining liquid from container at end of rinse cycle, and operating draining device and pump number of times alternatively during exchange |
| EP2201885B2 (en) † | 2008-12-22 | 2020-07-08 | Whirlpool EMEA S.p.A | Dishwasher |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7032604B2 (en) * | 2002-05-28 | 2006-04-25 | Maytag Corporation | Three rack dishwasher |
| DE10248538A1 (en) * | 2002-10-17 | 2004-04-29 | Aweco Appliance Systems Gmbh & Co. Kg | Water dirtiness measurement method for use with a dishwasher, whereby the heating rate of an electrical heating element is used as an indicator, in conjunction with a computation or look-up function, of water dirtiness |
| DE102007052332A1 (en) | 2007-10-31 | 2009-05-07 | Miele & Cie. Kg | Dishwasher with a turbidity sensor |
| US9918609B2 (en) * | 2009-12-21 | 2018-03-20 | Whirlpool Corporation | Rotating drum filter for a dishwashing machine |
| DE102011053545A1 (en) | 2011-09-13 | 2013-03-14 | Miele & Cie. Kg | Method for operating a washing machine with a rinsing liquor storage tank |
| DE102011053548A1 (en) | 2011-09-13 | 2013-03-14 | Miele & Cie. Kg | Process for cleaning a rinse liquor storage tank |
| DE102012200612A1 (en) * | 2011-09-20 | 2013-03-21 | Dürr Ecoclean GmbH | Cleaning system for workpieces with automatic process parameter setting |
| US20160370287A1 (en) * | 2015-06-17 | 2016-12-22 | Flodesign Sonics, Inc. | Turbidity sensor with improved flow path |
| US9661980B2 (en) * | 2015-10-09 | 2017-05-30 | Bsh Home Appliances Corporation | Pre-soak option for dishwashers |
| US11399690B2 (en) | 2019-09-30 | 2022-08-02 | Midea Group Co., Ltd. | Dishwasher with cam-based position sensor |
| US11484183B2 (en) | 2019-09-30 | 2022-11-01 | Midea Group Co., Ltd. | Dishwasher with image-based object sensing |
| US11259681B2 (en) | 2019-09-30 | 2022-03-01 | Midea Group Co., Ltd | Dishwasher with image-based diagnostics |
| US11464389B2 (en) | 2019-09-30 | 2022-10-11 | Midea Group Co., Ltd. | Dishwasher with image-based detergent sensing |
| US11026559B2 (en) * | 2019-09-30 | 2021-06-08 | Midea Group Co., Ltd. | Dishwasher with image-based fluid condition sensing |
| US11191416B2 (en) | 2019-09-30 | 2021-12-07 | Midea Group Co., Ltd. | Dishwasher with image-based position sensor |
| US11185209B2 (en) | 2019-11-20 | 2021-11-30 | Midea Group Co., Ltd. | Dishwasher steam generator |
| US11202550B2 (en) | 2019-11-20 | 2021-12-21 | Midea Group Co., Ltd. | Dishwasher thermal imaging system |
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| US5140168A (en) * | 1990-12-03 | 1992-08-18 | Great Lakes Instruments, Inc. | Turbidimeter signal processing circuit using alternating light sources |
| US5331177A (en) * | 1993-04-26 | 1994-07-19 | Honeywell Inc. | Turbidity sensor with analog to digital conversion capability |
| US5800628A (en) * | 1996-10-22 | 1998-09-01 | Honeywell Inc. | Continuous cycle operation for dishwashers using turbidity sensor feedback |
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| US5555583A (en) * | 1995-02-10 | 1996-09-17 | General Electric Company | Dynamic temperature compensation method for a turbidity sensor used in an appliance for washing articles |
| DE19705927A1 (en) * | 1997-02-17 | 1998-08-20 | Aeg Hausgeraete Gmbh | Dishwasher with a device for determining the degree of contamination of a washing liquid |
| US5831727A (en) * | 1997-04-29 | 1998-11-03 | Hach Company | Bubble elimination from liquid |
| DE19831688C1 (en) * | 1998-07-15 | 2000-04-06 | Whirlpool Co | Optical sensor |
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| DE10040483A1 (en) * | 2000-08-18 | 2002-03-07 | Miele & Cie | Method for determining the degree of contamination of the washing liquid in a program-controlled dishwasher equipped with a turbidity sensor |
-
2000
- 2000-11-28 DE DE10059112A patent/DE10059112C1/en not_active Expired - Fee Related
-
2001
- 2001-10-30 EP EP01125828A patent/EP1208790B1/en not_active Expired - Lifetime
- 2001-10-30 DE DE50111309T patent/DE50111309D1/en not_active Expired - Lifetime
- 2001-10-30 AT AT01125828T patent/ATE343344T1/en not_active IP Right Cessation
- 2001-10-30 ES ES01125828T patent/ES2272395T3/en not_active Expired - Lifetime
- 2001-11-27 US US10/001,838 patent/US7246625B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5140168A (en) * | 1990-12-03 | 1992-08-18 | Great Lakes Instruments, Inc. | Turbidimeter signal processing circuit using alternating light sources |
| US5331177A (en) * | 1993-04-26 | 1994-07-19 | Honeywell Inc. | Turbidity sensor with analog to digital conversion capability |
| US5800628A (en) * | 1996-10-22 | 1998-09-01 | Honeywell Inc. | Continuous cycle operation for dishwashers using turbidity sensor feedback |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1297780A2 (en) * | 2001-09-21 | 2003-04-02 | Miele & Cie. GmbH & Co. | Device with a turbidity sensor for a dishwasher or a washing machine |
| EP1297780A3 (en) * | 2001-09-21 | 2006-04-12 | Miele & Cie. KG | Device with a turbidity sensor for a dishwasher or a washing machine |
| EP1472967A2 (en) * | 2003-04-29 | 2004-11-03 | Miele & Cie. KG | Device with a turbidity sensor for a dishwasher or a washing machine |
| EP1472967A3 (en) * | 2003-04-29 | 2007-08-08 | Miele & Cie. KG | Device with a turbidity sensor for a dishwasher or a washing machine |
| US7392813B2 (en) | 2003-04-29 | 2008-07-01 | Miele & Cie. Kg | Device for a turbidity sensor for a dishwasher or washing machine |
| US20090028700A1 (en) * | 2007-07-23 | 2009-01-29 | Clinton Coker | Appliance pump |
| US8397736B2 (en) * | 2007-07-23 | 2013-03-19 | Fisher & Paykel Appliances Limited | Appliance pump |
| DE102008020475A1 (en) | 2008-04-23 | 2009-11-05 | Miele & Cie. Kg | Rinse cycle executing method for program-controlled household dishwasher, involves draining liquid from container at end of rinse cycle, and operating draining device and pump number of times alternatively during exchange |
| EP2201885B2 (en) † | 2008-12-22 | 2020-07-08 | Whirlpool EMEA S.p.A | Dishwasher |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE343344T1 (en) | 2006-11-15 |
| ES2272395T3 (en) | 2007-05-01 |
| US7246625B2 (en) | 2007-07-24 |
| DE10059112C1 (en) | 2002-05-08 |
| US20020062849A1 (en) | 2002-05-30 |
| EP1208790B1 (en) | 2006-10-25 |
| EP1208790A3 (en) | 2005-03-02 |
| DE50111309D1 (en) | 2006-12-07 |
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