EP0943287B1 - Dishwasher and method for operating the latter - Google Patents
Dishwasher and method for operating the latter Download PDFInfo
- Publication number
- EP0943287B1 EP0943287B1 EP98120202A EP98120202A EP0943287B1 EP 0943287 B1 EP0943287 B1 EP 0943287B1 EP 98120202 A EP98120202 A EP 98120202A EP 98120202 A EP98120202 A EP 98120202A EP 0943287 B1 EP0943287 B1 EP 0943287B1
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- EP
- European Patent Office
- Prior art keywords
- working container
- receiver
- dishwasher
- transmitter
- transmitters
- 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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- 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
- A47L15/4295—Arrangements for detecting or measuring the condition of the crockery or tableware, e.g. nature or quantity
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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
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
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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
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/006—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control using wireless communication between internal components of the machine
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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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/04—Crockery or tableware details, e.g. material, quantity, condition
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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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/30—Variation of electrical, magnetical or optical quantities
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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
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/32—Vibration or sound detection
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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
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions
Definitions
- the invention relates to a dishwasher according to the the preamble of claim 1 and a method for Operate this dishwasher according to the generic term of claim 7.
- a disadvantage of such Design for load detection in the dishwasher is that variable in the dishwasher Noises are evaluated.
- a broadband spectrum is to be evaluated, which one be overlaid at any time by outside noise can. Therefore, for such a load detection Signal correction or signal processing is very complex.
- a washing machine is known, which with a Transducer, the ultrasonic signals in the transmitter-receiver alternating operation transmits or receives their echoes. For recognition the level change in the washing machine the transit time differences of the generated signals and the Echo signals evaluated.
- a sensor and / or a measuring device for determining the type and / or the amount of this wash items.
- the sensor is particularly good at determining the load so designed that it is electromagnetic Can recognize waves.
- a Work container which is used to hold the dishes, at least one sender and at least one receiver from arranged electromagnetic waves. If the transmitter now sends signals, these will be partially reflected by the items to be washed or, if necessary, arrive on time delayed to the side of the transmitter opposite the transmitter Work container.
- Transmitter and receiver are preferably within the working container at a large distance, especially on a space diagonal of the work container arranged, so the received signal can be better analyzed. This is essentially because the direct and the reflected Signals at a greater time interval from each other lie than in a shorter spaced arrangement of sender and receiver. It is still favorable that the emitted signals pulse-like and especially in not too short distance from each other. In this way can directly incoming and reflected signals do not overlay or only slightly.
- a dishwasher has two or more baskets on, the different loads of these Dish baskets can be determined independently by the transmitter and the receiver together on a diagonal a surface parallel to the bottom of the work container lie. In this way, every basket is through preferably a transmitter / receiver pair on its load examined.
- Light waves can be used as electromagnetic waves become.
- the load of dishes to be registered and a this washing program treating washware is in its sequence affected. This can be done in a known manner, for example by filling the device with one of the loads appropriate amount of liquid and a to this load adapted heating of the rinsing liquid happen.
- the load detection is at the beginning of each wash program carried out. This is done immediately after Program start a capacity measurement. Through the brought in Loading changes the capacitance of the capacitor on. A difference value formation of this measured value the reference value indicates the loading.
- the program sequence of a household dishwasher can be adapted to the type and amount of items to be washed.
- electromagnetic wave transmitters S 1 , S 2 and receivers E 1 , E 2 , E 3 are arranged within their working container 1.
- One pair of transmitters / receivers is arranged at the level of each of the two crockery baskets 3, 5.
- the arrangement of transmitter S 1 or S 2 and receiver E 1 or E 2 takes place both for the upper basket 3 and for the lower basket 5 in the corner areas of the working container, so that transmitter S 1 , S 2 and receiver E 1 , E 2 face each other in pairs diagonally.
- Another electromagnetic wave receiver E 3 is located at a height between the two crockery baskets 3, 5 in a further corner area of the work container 1.
- the transmitters S 1 , S 2 and receiver E 3 are attached to a common side of the work container. This side is preferably parallel to flat pieces of crockery which are introduced vertically into the crockery baskets 3, 5.
- a load measurement is carried out immediately after the device is started.
- the electromagnetic wave transmitter S 1 assigned to the upper crockery basket 3 first emits a pulse-like signal.
- This signal is received by the receiver E 1, which is likewise assigned to the upper crockery basket 3 and is diagonally opposite the transmitter S 1 , the loss of intensity depending on the density of the load.
- the signal is partially reflected by the items to be washed in the crockery basket 3. With simple reflection, these reflected signals reach the receiver E 3 .
- a multiply reflected signal is received by the receivers E 1 and E 2 , with a time delay compared to a signal arriving directly at E 1 .
- the signal received by the receiver E 3 is of a high intensity, this indicates a high loading density. If, on the other hand, a strong direct signal is received by the receiver E 1 , there are few items to be washed in the upper basket 3. Thus, the ratio of the directly received signal to the simply reflected signal gives an indication of the loading density.
- Such a load detection also helps to make a statement about the type of washware parts introduced. This can be determined from the sum of the signals received by the three receivers. In the case of a high proportion of plastic tableware parts, a large proportion of the intensity of the signal emitted by the transmitter S 1 is absorbed by these tableware parts. Porcelain and metal parts, on the other hand, reflect most of an incoming signal, so that the signal is only slightly attenuated.
- the same measurement is carried out on the lower crockery basket 5 by emitting one or more electromagnetic wave pulses by the transmitter S 2 assigned to the lower crockery basket 5 , In this case, taking the transmitter S to the major part of the direct light passing through the lower basket 5 signals 2 diagonally opposite lower receiver E. 2 Single-reflected signals also arrive at the receiver E 3 , multiple-reflected signals are in turn forwarded to the receivers E 2 and E 1 after a time delay.
- the two transmitter / receiver pairs E 1 , S 1 and E 2 , S 2 are provided on the two opposite side walls of the working container directly in the area of a loading opening.
- the load measurement takes place immediately when the respective loaded crockery basket 3 or 5 is inserted.
- the intensity of the signals received is recorded as a function of time during the insertion process, so that the entire crockery basket surface is scanned in this way.
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- Washing And Drying Of Tableware (AREA)
Description
Die Erfindung betrifft eine Geschirrspülmaschine nach dem dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zum Betreiben dieser Geschirrspülmaschine nach dem Oberbegriff des Anspruchs 7.The invention relates to a dishwasher according to the the preamble of claim 1 and a method for Operate this dishwasher according to the generic term of claim 7.
Um eine Geschirrspülmaschine mit möglichst geringen Verbrauchsdaten, also wenig Wasser und Energie, zu betreiben, ist es bekannt, die Menge des eingebrachten Spülgutes abzuschätzen. Dazu wird die Menge der für die im Verlauf eines Spülprogrammes erste Befüllung benötigte Flüssigkeit sowie die Dauer der für die Beladung benötigten Heizphase ermittelt. Anhand dieser Daten erfolgt die Abschätzung der Art und Menge der Beladung, wobei die Füllmenge einen Grad der Benetzung und die Aufheizgeschwindigkeit ein Maß für die Wärmekapazität des Geschirrs angibt. Mit Hilfe dieser Werte wird der weitere Programmablauf eingestellt. Aus EP 0 793 939 A1 ist eine Geschirrspülmaschine bekannt, die einen akustischen Detektor umfasst, welcher die im Spülbehälter erzeugten Geräusche während eines Spülganges auswertet, welche insbesondere vom Wasserdruck und Geräuschen der Betriebsmittel abhängig sind. Nachteilig an einer derartigen Ausgestaltung zur Beladungserkennung in der Geschirrspülmaschine ist, dass im Geschirrspüler entstehende, variable Geräusche ausgewertet werden. Wobei von besonderem Nachteil ist, dass ein breitbandiges Spektrum auszuwerten ist, welches jederzeit durch Geräusche von aussen überlagert sein kann. Deshalb ist für eine derartige Beladungserkennung die Signalkorrektur bzw. Signalverarbeitung sehr aufwendig. Aus US 5 305 485 ist eine Waschmaschine bekannt, die mit einem Transducer, der im Sender-Empfänger-Wechselbetrieb Ultraschallsignale aussendet bzw. deren Echos empfängt. Zur Erkennung der Änderung der Füllhöhe in der Waschmaschine werden die Laufzeitunterschiede der erzeugten Signale und der Echosignale ausgewertet.To a dishwasher with the lowest possible Operate consumption data, i.e. little water and energy, it is known the amount of items to be washed estimate. To do this, the amount of for the course of a washing program the first filling required liquid and the duration of the heating phase required for loading determined. The data is estimated on the basis of this data Type and amount of loading, the filling amount being one degree the wetting and the heating rate a measure for indicates the heat capacity of the dishes. With the help of this Values the further program sequence is set. From EP 0 793 939 A1, a dishwasher is known, the one acoustic detector, which includes the in the rinse tank evaluates generated noise during a rinse cycle, which in particular of the water pressure and noise of the equipment are dependent. A disadvantage of such Design for load detection in the dishwasher is that variable in the dishwasher Noises are evaluated. Of particular disadvantage is that a broadband spectrum is to be evaluated, which one be overlaid at any time by outside noise can. Therefore, for such a load detection Signal correction or signal processing is very complex. Out US 5 305 485 a washing machine is known, which with a Transducer, the ultrasonic signals in the transmitter-receiver alternating operation transmits or receives their echoes. For recognition the level change in the washing machine the transit time differences of the generated signals and the Echo signals evaluated.
Die im Stand der Technik aufgezeigten Beladungserkennungen liefern jedoch nur eine grobe Abschätzung über die Art und Menge der eingebrachten Spülgutteile. Eine Reduzierung der Verbrauchsdaten ist daher nur in beschränktem Umfang sinnvoll, um nicht zu riskieren, daß infolge der Ungenauigkeit der Abschätzung ein Spülgang mit einem schlechten Spülergebnis abgeschlossen wird. The load detections shown in the prior art however only provide a rough estimate of the type and Quantity of items to be washed. A reduction in Consumption data is therefore only meaningful to a limited extent, so as not to risk that due to the inaccuracy the estimation of a wash cycle with a poor wash result is completed.
Es ist daher Aufgabe der Erfindung, eine Geschirrspülmaschine anzugeben, bei welcher mit besonders niedrigem Wasser- und Energieverbrauch ein zufriedenstellendes Reinigungsergebnis erzielbar ist, und darüberhinaus ein Verfahren zum Betreiben einer Geschirrspülmaschine anzugeben, durch welches die Art und/oder die Menge eines Spülgutes ermittelt wird.It is therefore an object of the invention to provide a dishwasher to indicate at which with particularly low water and energy consumption a satisfactory cleaning result is achievable, and also a method specify to operate a dishwasher, by which the type and / or the quantity of a wash ware is determined.
Die Lösung dieser Aufgabe erfolgt bei einer Geschirrspülmaschine zum Spülen von Spülgut nach dem kennzeichnenden Merkmal des Anspruchs 1, sowie bei einem Verfahren zur Ermittlung der Art und/oder der Menge eines Spülgutes gem. dem kennzeichnenden Merkmal des Anspruchs 7.This problem is solved in a dishwasher for washing dishes according to the characteristic Feature of claim 1, as well as in a method for determination the type and / or the amount of items to be washed according to the characteristic feature of claim 7.
In einer Geschirrspülmaschine zum Spülen von Spülgut ist ein Sensor und/oder ein Meßmittel zum Ermitteln der Art und/oder der Menge dieses Spülgutes angeordnet. Um diese Beladung besonders gut ermitteln zu können, ist der Sensor so beschaffen, daß es elektromagnetische Wellen erkennen kann. In a dishwasher for washing dishes a sensor and / or a measuring device for determining the type and / or the amount of this wash items. Around The sensor is particularly good at determining the load so designed that it is electromagnetic Can recognize waves.
Um jedoch bereits vor Beginn eines Spülprogrammes die Beladungserkennung durchführen zu können, ist innerhalb eines Arbeitsbehälters, der zur Aufnahme des Spülgutes dient, mindestens ein Sender und mindestens ein Empfänger von elektromagnetischen Wellen angeordnet. Schickt der Sender nun Signale aus, so werden diese von den eingebrachten Spülgutteilen teilweise reflektiert oder gelangen andernteils gegebenenfalls zeitlich verzögert an die dem Sender gegenüberliegenden Seite des Arbeitsbehälters. Die zeitliche Auswertung des vom Empfänger empfangenen Signales, an welchem ein emittiertes Signal teilweise direkt, aber auch infolge einfacher oder mehrfacher Reflektionen zeitlich verzögert ankommt, gibt über die angeordneten Spülgutteile Aufschluß.However, in order to detect the load even before the start of a washing program To be able to perform is within a Work container, which is used to hold the dishes, at least one sender and at least one receiver from arranged electromagnetic waves. If the transmitter now sends signals, these will be partially reflected by the items to be washed or, if necessary, arrive on time delayed to the side of the transmitter opposite the transmitter Work container. The temporal evaluation of the recipient received signal on which an emitted signal partly directly, but also as a result of single or multiple Reflections arrives with a time delay, gives about the arranged items to be washed out.
Werden Sender und Empfänger in bevorzugter Weise innerhalb des Arbeitsbehälters in großem Abstand, insbesondere auf einer Raumdiagonalen des Arbeitsbehälters angeordnet, so läßt sich das empfangene Signal besser analysieren. Dies liegt im Wesentlichen daran, daß das direkte und die reflektierten Signale in größerem zeitlichen Abstand voneinander liegen als bei einer kürzer distanzierten Anordnung von Sender und Empfänger. Es ist weiterhin günstig, daß die ausgesandten Signale impulsartig und vor allem in nicht zu kurz bemessenem Abstand voneinander sind. Auf diese Weise können sich direkt ankommende und reflektierte Signale nicht oder nur wenig überlagern.Transmitter and receiver are preferably within the working container at a large distance, especially on a space diagonal of the work container arranged, so the received signal can be better analyzed. This is essentially because the direct and the reflected Signals at a greater time interval from each other lie than in a shorter spaced arrangement of sender and receiver. It is still favorable that the emitted signals pulse-like and especially in not too short distance from each other. In this way can directly incoming and reflected signals do not overlay or only slightly.
Weist eine Geschirrspülmaschine zwei oder mehr Geschirrkorbe auf, so können die unterschiedlichen Beladungen dieser Geschirrkörbe unabhängig voneinander ermittelt werden, indem der Sender und der Empfänger gemeinsam auf einer Diagonalen einer zum Boden des Arbeitsbehälters parallelen Fläche liegen. Auf diese Weise wird jeder Geschirrkorb durch vorzugsweise ein Sender/Empfänger-Paar auf seine Beladung hin untersucht.A dishwasher has two or more baskets on, the different loads of these Dish baskets can be determined independently by the transmitter and the receiver together on a diagonal a surface parallel to the bottom of the work container lie. In this way, every basket is through preferably a transmitter / receiver pair on its load examined.
Als elektromagnetische Wellen können dabei Lichtwellen verwendet werden.Light waves can be used as electromagnetic waves become.
Mit Hilfe dieses ermittelten zeitlichen Verlaufes der empfangenen Signale wird von einer Auswerteeinheit, die beispielsweise innerhalb einer elektronischen Programmsteuerung umfaßt ist, die Spülgutbeladung registriert und ein dieses Spülgut behandelndes Spülprogramm wird in seinem Ablauf beeinflußt. Dies kann beispielsweise in bekannter Weise durch ein Befüllen des Gerätes mit einer der Beladung entsprechenden Flüssigkeitsmenge und ein an diese Beladung angepaßtes Aufheizen der Spülflüssigkeit geschehen.With the help of this determined time course of the received Signals from an evaluation unit, for example within an electronic program control is included, the load of dishes to be registered and a this washing program treating washware is in its sequence affected. This can be done in a known manner, for example by filling the device with one of the loads appropriate amount of liquid and a to this load adapted heating of the rinsing liquid happen.
Alternativ oder zusätzlich zur Messung von elektromagnetischen Wellen ist auch eine kapazitive Analyse des Arbeitsbehälters der Geschirrspülmaschine denkbar. Dazu werden an zwei vorzugsweise gegenüberliegenden Seiten des nichtmetallischen Arbeitsbehälters je eine Elektrode angeordnet. Vor der ersten Inbetriebnahme der Geschirrspülmaschine wird eine Messung der Kapazität des so gebildeten Kondensators durchgeführt, wobei dies ohne Beladung mit Spülgutteilen und lediglich mit regelmäßig im Arbeitsbehälter angeordneten, zur Spülgutaufnahme dienenden Geschirrund ggf. Besteckkörben erfolgt. Der so erhaltene Meßwert dient als Bezugswert.Alternatively or in addition to measuring electromagnetic waves is also a capacitive analysis of the working container of the dishwasher is conceivable. To are on two preferably opposite sides of the non-metallic work container each arranged an electrode. Before using the dishwasher for the first time is a measurement of the capacitance of the thus formed Condenser performed, this without loading with Dishwashing parts and only with regular in the work container arranged dishes and for serving items if necessary cutlery baskets. The measured value thus obtained serves as a reference value.
Die Beladungerkennung wird zu Beginn eines jeden Spülprogrammes durchgeführt. Dazu erfolgt unmittelbar nach dem Programmstart eine Kapazitätsmessung. Durch die eingebrachte Beladung stellt sich eine veränderte Kapazität des Kondensators ein. Eine Differenzwertbildung dieses Meßwertes zum Bezugswert läßt auf die eingebrachte Beladung schließen.The load detection is at the beginning of each wash program carried out. This is done immediately after Program start a capacity measurement. Through the brought in Loading changes the capacitance of the capacitor on. A difference value formation of this measured value the reference value indicates the loading.
Die Erfindung ist im Folgenden anhand der Zeichnungen eines Ausführungsbeispiels näher erläutert.The invention is based on the drawings Embodiment explained in more detail.
Dabei zeigen:
- Fig. 1
- eine Haushalts-Geschirrspülmaschine mit Ultraschall-Sendern und -Empfängern in der Seitenansicht und
- Fig. 2
- die Geschirrspülmaschine gem. Fig. 1, jedoch in der Draufsicht.
- Fig. 1
- a household dishwasher with ultrasonic transmitters and receivers in the side view and
- Fig. 2
- the dishwasher acc. Fig. 1, but in plan view.
Eine Haushalts-Geschirrspülmaschine ist in ihrem Programmablauf
an die Art und die Menge des eingebrachten
Spülgutes anpassbar. Dazu sind innerhalb ihres Arbeitsbehälters
1 elektromagnetische Wellen-Sender S1, S2 und -Empfänger E1, E2, E3
angeordnet. Jeweils ein Sender/Empfänger-Paar ist in Höhe
eines jeden der beiden Geschirrkörbe 3, 5 angeordnet. Die
Anordnung von Sender S1 bzw. S2 und Empfänger E1 bzw. E2 erfolgt
dabei sowohl für den Oberkorb 3 als auch für den Unterkorb
5 in den Eckbereichen des Arbeitsbehälters, so daß
Sender S1, S2 und Empfänger E1, E2 sich jeweils paarweise
diagonal gegenüberliegen. Ein weiterer elektromagnetische Wellen-Empfänger
E3 befindet sich auf einer Höhe zwischen den beiden
Geschirrkörben 3, 5 in einem weiteren Eckbereich des
Arbeitsbehälters 1. Dabei sind die Sender S1, S2 und Empfänger
E3 auf einer gemeinsamen Seite des Arbeitsbehälters angebracht.
Vorzugsweise liegt diese Seite parallel zu flächigen
Geschirrteilen, welche senkrecht in die Geschirrkörbe
3, 5 eingebracht sind.The program sequence of a household dishwasher can be adapted to the type and amount of items to be washed. For this purpose, electromagnetic wave transmitters S 1 , S 2 and receivers E 1 , E 2 , E 3 are arranged within their working container 1. One pair of transmitters / receivers is arranged at the level of each of the two
Zu Beginn eines jeden Spülprogrammes wird unmittelbar nach
dem Starten des Gerätes eine Beladungsmessung durchgeführt.
Dazu sendet bei geschlossenem Arbeitsbehälter 1 zunächst
der dem oberen Geschirrkorb 3 zugeordnete elektromagnetische Wellen-Sender
S1 ein impulsartiges Signal aus. Dieses Signal wird
von dem ebenfalls dem oberen Geschirrkorb 3 zugeordneten
und den Sender S1 diagonal gegenüberliegenden Empfänger E1
abgeschwächt empfangen, wobei der Intensitätsverlust von
der Dichte der Beladung abhängt. Teilweise wird das Signal
jedoch von den Spülgut-Gegenständen im Geschirrkorb 3 reflektiert.
Diese reflektierten Signale erreichen bei einfacher
Reflexion den Empfänger E3. Ein mehrfach reflektiertes
Signal wird dagegen von den Empfängern E1 und E2 aufgenommen,
wobei sich im Vergleich zu einem direkt bei E1 ankommenden
Signal eine zeitlich Verzögerung ergibt. At the beginning of each washing program, a load measurement is carried out immediately after the device is started. For this purpose, when the work container 1 is closed, the electromagnetic wave transmitter S 1 assigned to the
Ist das vom Empfänger E3 empfangene Signal von einer hohen
Intensität, so läßt dies auf eine hohe Beladungsdichte
schließen. Wird dagegen vom Empfänger E1 ein starkes direktes
Signal empfangen, so befinden sich wenig Spülgutteile
im Oberkorb 3. Somit ergibt sich durch das Verhältnis von
direkt empfangenem Signal zu einfach reflektiertem Signal
ein Hinweis auf die Beladungsdichte.If the signal received by the receiver E 3 is of a high intensity, this indicates a high loading density. If, on the other hand, a strong direct signal is received by the receiver E 1 , there are few items to be washed in the
Eine derartige Beladungserkennung verhilft aber auch zu einer Aussage über die Art der eingebrachten Spülgutteile. Diese läßt sich aus der Summe der von den drei Empfängern aufgenommenen Signale ermitteln. Bei einem hohen Anteil von Geschirrteilen aus Kunststoff wird von diesen Geschirrteilen ein großer Anteil der Intensität des vom Sender S1 emittierten Signales absorbiert. Porzellan- und Metallteile dagegen reflektieren den größten Teil eines auftreffenden Signals, so daß eine Abschwächung des Signals nur in geringem Maße stattfindet.Such a load detection also helps to make a statement about the type of washware parts introduced. This can be determined from the sum of the signals received by the three receivers. In the case of a high proportion of plastic tableware parts, a large proportion of the intensity of the signal emitted by the transmitter S 1 is absorbed by these tableware parts. Porcelain and metal parts, on the other hand, reflect most of an incoming signal, so that the signal is only slightly attenuated.
Nachdem die Beladung des oberen Geschirrkorbs 3 durch Aussenden
von einem oder mehreren Signalen vom oberen Sender S2
erfaßt worden ist, erfolgt die gleiche Messung am unteren
Geschirrkorb 5 durch Aussenden eines oder mehrerer elektromagnetische Wellen
-Impulse durch den dem unteren Geschirrkorb 5 zugeordneten
Sender S2. In diesem Fall nimmt der dem Sender S2
diagonal gegenüberliegende untere Empfänger E2 den überwiegenden
Teil der direkt durch den unteren Geschirrkorb 5
hindurchtretenden Signale auf. Einfach reflektierte Signale
gelangen ebenfalls zum Empfänger E3, mehrfach reflektierte
Signale werden wiederum nach zeitlicher Verzögerung den
Empfängern E2 und E1 zugeleitet. After the loading of the
Bei einer weiteren, nicht dargestellten Ausführungsform der
Erfindung sind die beiden Sender/Empfänger-Paare E1, S1 bzw.
E2, S2 auf den beiden einander gegenüberliegenden Seitenwänden
des Arbeitsbehälters unmittelbar im Bereich einer Beschickungsöffnung
vorgesehen. In diesem Fall erfolgt die
Beladungsmessung unmittelbar beim Einschieben des jeweiligen
beladenen Geschirrkorbes 3 bzw. 5. Hierbei wird während
des Einschubvorganges die Intensität der empfangenen Signale
als zeitliche Funktion aufgenommen, so daß auf diese
Weise die gesamte Geschirrkorbfläche abgetastet wird.In a further embodiment of the invention, not shown, the two transmitter / receiver pairs E 1 , S 1 and E 2 , S 2 are provided on the two opposite side walls of the working container directly in the area of a loading opening. In this case, the load measurement takes place immediately when the respective loaded
Claims (12)
- Dishwasher for washing goods, with means to determine the type and/or quantity of the goods to be washed, characterized in that the means consist of at least one transmitter (S1, S2) and one receiver (E1, E2, E3), and/or include measuring means, the electromagnetic waves which are emitted by the at least one transmitter being detectable by the at least one receiver (E1, E2, E3), and the electrical capacitance of a working container being detectable by the measuring means, by evaluating a specified current or voltage value (1).
- Dishwasher according to Claim 1, characterized in that the goods to be washed can be arranged in a working container (1), the working container (1) having as sources of electromagnetic waves at least two transmitters (S1, S2) and a number of receivers (E1, E2, E3) which is at least the number of transmitters increased by one, by which receivers the emitted electromagnetic waves can be detected.
- Dishwasher according to Claim 1 or 2, characterized in that transmitters (S1, S2) and receivers (E1, E2, E3) are fixed within the working container (1) with a large gap between them.
- Dishwasher according to one of Claims 1 to 3, characterized in that one transmitter (S1, S2) and one receiver (E1, E2) lie on a common three-dimensional diagonal of the working container (1).
- Dishwasher according to one of Claims 1 to 3, characterized in that one transmitter (S1, S2) and one receiver (E1, E2) lie on a common diagonal of a surface which is parallel to the floor of the working container (1).
- Dishwasher according to one of Claims 1 to 5, characterized in that the working container (1) consists of a non-metallic material, and that on each of two opposite walls of the working container (1) one electrode of an electrode pair in the form of measuring means is arranged, so that the electrical capacitance of the space which is formed between the electrodes can be measured.
- Method of determining the type and/or quantity of the goods to be washed in a dishwasher, characterized in that electromagnetic waves are emitted by at least one transmitter (S1, S2), and are detected by at least one receiver (E1, E2, E3), and/or the electrical capacitance of a working container (1) is detected by provided measuring means, by evaluating a specified current or voltage value.
- Method according to Claim 7, characterized in that at least two transmitters (S1, S2) emit electromagnetic waves, the signals of which are received by a number of receivers (E1, E2, E3) which is the number of transmitters increased by one, into a working container (1) which holds the goods to be washed.
- Method according to Claim 7 or 8, characterized in that the electromagnetic waves are emitted by the transmitters (S1, S2) in pulses.
- Method according to one of Claims 7 to 9, characterized in that the course of the signals of the electromagnetic wave which are received by the receiver or receivers (E1, E2, E3) over time is recorded by an evaluation unit.
- Method according to one of Claims 7 to 10, characterized in that an electrode pair, which bounds the working container (1) of the dishwasher on two sides, measures the capacitance which is formed by this arrangement, a differential capacitance resulting from a measurement without the working container being loaded, and a measurement with a load to be analysed, being determined.
- Method according to one of Claims 7 to 11, characterized in that a washing programme is influenced depending on those signals of the emitted electromagnetic wave which are captured by the receiver (E1, E2, E3), and/or their courses over time, and/or the differential capacitance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19812230 | 1998-03-20 | ||
| DE19812230A DE19812230A1 (en) | 1998-03-20 | 1998-03-20 | Dishwasher and method for operating the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0943287A1 EP0943287A1 (en) | 1999-09-22 |
| EP0943287B1 true EP0943287B1 (en) | 2004-01-07 |
Family
ID=7861644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98120202A Expired - Lifetime EP0943287B1 (en) | 1998-03-20 | 1998-10-24 | Dishwasher and method for operating the latter |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0943287B1 (en) |
| DE (2) | DE19812230A1 (en) |
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| CN104224079A (en) * | 2008-03-14 | 2014-12-24 | 浦瑞玛柯Feg有限责任公司 | Conveyor dishwasher and method of operating a conveyor |
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| ITPN960015A1 (en) * | 1996-03-04 | 1997-09-04 | Zeltron Spa | WASHING MACHINE |
-
1998
- 1998-03-20 DE DE19812230A patent/DE19812230A1/en not_active Withdrawn
- 1998-10-24 EP EP98120202A patent/EP0943287B1/en not_active Expired - Lifetime
- 1998-10-24 DE DE59810547T patent/DE59810547D1/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104224079A (en) * | 2008-03-14 | 2014-12-24 | 浦瑞玛柯Feg有限责任公司 | Conveyor dishwasher and method of operating a conveyor |
| CN104224079B (en) * | 2008-03-14 | 2018-02-06 | 浦瑞玛柯Feg有限责任公司 | Conveying type dish-washing machine and its application method |
| US10080477B2 (en) | 2009-05-29 | 2018-09-25 | BSH Hausgeräte GmbH | Dishwasher with dish detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19812230A1 (en) | 1999-09-23 |
| DE59810547D1 (en) | 2004-02-12 |
| EP0943287A1 (en) | 1999-09-22 |
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