EP1411164B1 - Method for filling the workspace of a domestic appliance and domestic appliance - Google Patents

Method for filling the workspace of a domestic appliance and domestic appliance Download PDF

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Publication number
EP1411164B1
EP1411164B1 EP03017024A EP03017024A EP1411164B1 EP 1411164 B1 EP1411164 B1 EP 1411164B1 EP 03017024 A EP03017024 A EP 03017024A EP 03017024 A EP03017024 A EP 03017024A EP 1411164 B1 EP1411164 B1 EP 1411164B1
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EP
European Patent Office
Prior art keywords
pump
water
speed
feed rate
rotation
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.)
Expired - Fee Related
Application number
EP03017024A
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German (de)
French (fr)
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EP1411164A1 (en
Inventor
Winfried Steiner
Karlheinz Kohles
Rolf Stahlmann
Stefan Füglein
Klaus-Martin Forst
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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Publication of EP1411164A1 publication Critical patent/EP1411164A1/en
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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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/085—Arrangements or adaptations of pumps
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/088—Liquid supply arrangements

Definitions

  • the invention relates to a method for filling the working space of a household appliance, in particular a dishwasher or a washing machine, with water, in which the water of the household machine is supplied from a faucet via a hose. Furthermore, the invention relates to a household appliance.
  • BE-A-645 123 discloses a method according to the preamble of claim 1 and a household machine according to the preamble of claim 6.
  • An exact filling volume of the workspace of the Haushalsmaschine can be achieved by running in a static state, a certain volume of water, which is stored in the machine in respective tanks, run into the machine (static filling). However, only a multiple of the tank volume can be filled.
  • Another method uses dynamic water filling at a given pump speed, where the filling process is performed by a pressure monitor or pressure sensor is monitored. With the help of a vane meter, the feed rate of the water can be measured from a line and thus the duration of the filling can be determined (dynamic filling).
  • the present invention seeks to propose a method for filling the working space of a generic household appliance and a household appliance, with which it is possible or to ensure an improved running behavior of the pump; In particular, it should be prevented that unwanted noise during operation of the pump arise.
  • the solution of this problem by the invention according to the method is characterized in that the water is fed to a pump and conveyed by the pump in the working space of the household machine, that the pump is designed as a controllable in its rotational speed according to a predetermined function curve pump is, and that the rotational speed or speed of the pump, the feed rate, ie the flow rate per time, the water is adjusted in the region upstream of the pump.
  • the rotational speed of the pump when filling the working space is increased from zero to a maximum rotational speed substantially linear.
  • the course of the resulting ramp function of the rotational speed of the pump can be selected so that the pump is a sufficient supply of water for operation with virtually no air bubbles available.
  • the definition of the function curve of the rotational speed of the pump takes place on the basis of the once measured flow speed of the water in the region upstream of the pump.
  • the rotational speed of the pump is adjusted as a function of the feed rate of the water, which is determined by a feed speed measuring element arranged in the region upstream of the pump, in particular an impeller counter.
  • the household machine the water is supplied from a faucet via a hose or is supplied, is characterized by a pump, which is supplied to the water or feedable, and a working space that can be filled by means of the pump, the pump as a pump controllable in terms of its rotational speed in accordance with a predeterminable functional profile is formed.
  • a Zulauf fürsmesselement can be arranged in the region upstream of the pump, which is suitable for determining the feed rate of the water in the pump;
  • An inflow speed measuring element is preferably an impeller counter.
  • control or regulating means may be provided which are suitable for controlling the rotational speed of the pump and which receive as input the flow velocity determined by the inlet velocity measuring element.
  • a household machine 2 is sketched in the form of a washing machine, which has a working space 1, which must be filled for washing with water.
  • the water is supplied from a tap 7 via a hose 8 of the washing machine 2.
  • the water is fed via an unspecified pipe section of a pump 3, which is electrically operated. It promotes the water into the working space 1 with a predefinable rotational speed or speed n.
  • the pump 3 is designed as a controllable pump, that is, the course of the rotational speed n as a function of the time t, the pump 3 can be specified.
  • the pump with a rotational speed-time profile, as exemplified in Fig. 3 outlined.
  • the rotational speed n of the pump 3 is raised linearly beginning at time zero, until a maximum rotational speed n max is reached; This results in a "ramp function".
  • a desired start-up behavior ie, a desired "ramp function”
  • This is done according to the invention as a function of the feed rate Q of the water in the pump 3 - seen in the flow direction of the water - upstream region. 4
  • the slope of the in Fig. 3 "starting ramp” is set so as to avoid a critical water level at which the pump 3 would draw and convey air - which causes the unwanted noise.
  • the increase of the pump rotation speed n is adjusted to the water supply speed Q in a noise optimized manner.
  • Fig. 3 is a critical area outlined 9, which is intended to suggest that the pump 3 would then, if the rotational speed n is ramped up too fast, in the "snorkeling" operation would get what it should be avoided according to the invention.
  • a further embodiment of the invention is outlined.
  • a Zulauf Anlagensmesselement 5 is arranged in the form of a wellgelradnourisheers.
  • the measured by the impeller 5 signal for the feed rate Q is fed to a control or regulating means 6.
  • the permissible function curve of the rotational speed n is stored as a function of the time t as a function of the feed rate Q, ie stored.
  • the control or regulating means 6 is therefore able to control the pump 3 so that the permissible operating range is not left, ie that in particular the in Fig. 3 sketched critical area 9 is not reached.
  • the feed rate Q can be used directly to determine the startup speed or the rotational acceleration of the pump 3.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Füllen des Arbeitsraumes einer Haushaltsmaschine, insbesondere einer Geschirrspülmaschine oder einer Waschmaschine, mit Wasser, bei dem das Wasser der Haushaltsmaschine von einem Wasserhahn über einen Schlauch zugeführt wird. Des weiteren betrifft die Erfindung eine Haushaltsmaschine.The invention relates to a method for filling the working space of a household appliance, in particular a dishwasher or a washing machine, with water, in which the water of the household machine is supplied from a faucet via a hose. Furthermore, the invention relates to a household appliance.

BE-A-645123 offenbart ein Verfahren gemäβ dem Oberbegriff des Anspruchs 1 und eine Haushaltmaschine gemäβ dem Oberbegriff des Anspruchs 6. BE-A-645 123 discloses a method according to the preamble of claim 1 and a household machine according to the preamble of claim 6.

Haushaltsmaschinen, wie Geschirrspülmaschinen oder Waschmaschinen, benötigen für ihren Betrieb Wasser, das mittels einer Pumpe dem Arbeitsraum der Haushaltsmaschine zugeführt wird. Um einer solchen Maschine ausreichend Wasser zur Verfügung zu stellen, sind im Stand der Technik im wesentlichen zwei verschiedene Füllstrategien bekannt:Domestic machines, such as dishwashers or washing machines, require water for their operation, which is supplied by means of a pump to the working space of the household appliance. In order to provide sufficient water to such a machine, essentially two different filling strategies are known in the prior art:

Ein exaktes Füllvolumen des Arbeitsraumes der Haushalsmaschine kann dadurch erreicht werden, dass man in einem statischen Zustand ein bestimmtes Wasservolumen, das in der Maschine in entsprechenden Tanks bevorratet wird, in die Maschine einlaufen lässt (statisches Füllen). Dabei kann allerdings nur ein Vielfaches des Tankvolumens eingefüllt werden.An exact filling volume of the workspace of the Haushalsmaschine can be achieved by running in a static state, a certain volume of water, which is stored in the machine in respective tanks, run into the machine (static filling). However, only a multiple of the tank volume can be filled.

Ein anderes Verfahren bedient sich des dynamischen Wasserfüllens mit vorgegebener Pumpendrehzahl, bei dem der Füllvorgang durch einen Druckwächter oder Drucksensor überwacht wird. Mit Hilfe eines Flügelradzählers kann die Zulaufgeschwindigkeit des Wassers aus einer Leitung gemessen und damit die Zeitdauer des Füllens ermittelt werden (dynamisches Füllen).Another method uses dynamic water filling at a given pump speed, where the filling process is performed by a pressure monitor or pressure sensor is monitored. With the help of a vane meter, the feed rate of the water can be measured from a line and thus the duration of the filling can be determined (dynamic filling).

Bekannt ist auch, die beiden vorgenannten Füllstrategien miteinander zu kombinieren. So wird bei der DE 198 28 768 A1 bei ausgeschalteter Umwälzpumpe zunächst Frischwasser in einen Spülbehälter einer Geschirrspülmaschine eingefüllt. Der Wasserzulauf wird so lange aufrecht erhalten, bis ein minimales Arbeitsniveau erreicht ist. Bei diesem minimalen Arbeitsniveau ist sichergestellt, dass beim Zuschalten der Umwälzpumpe dieser ausreichend Flüssigkeit zur Verfügung steht. Anschließend wird die Umwälzpumpe eingeschaltet und der Wasserzulauf fortgesetzt, bis ein mittleres Arbeitsniveau erreicht ist. Die Niveausteuerung erfolgt dabei über einen Drucksensor, der das Erreichen der einzelnen Niveaustufen erfasst und einer Programmsteuerung übermittelt.It is also known to combine the two aforementioned filling strategies with each other. So will the case of DE 198 28 768 A1 When the circulating pump is switched off, first of all fresh water is filled into a washing container of a dishwasher. The water supply is maintained until a minimum working level is reached. This minimum working level ensures that sufficient liquid is available when the circulating pump is connected. Subsequently, the circulation pump is turned on and the water supply continued until a mean working level is reached. The level control takes place via a pressure sensor, which detects the achievement of the individual levels and transmits a program control.

Nachteilig ist beim rein statischen Füllen, dass dieses sehr stark von der Durchflussrate des Wassers abhängig ist, was ein genaues bedarfsabhängiges Füllen sehr stark beeinflusst. Befindet sich zuwenig Wasser in der Maschine, zieht die Umwälzpumpe Luft und fährt in einen lauten "schnorchelnden" Betrieb. Füllt man mehr Wasser ein, um dieses Geräusch zu unterbinden, beeinflusst man dadurch andere Betriebsparameter - insbesondere die Verbrauchswerte für Energie und Wasser - in negativer Weise. Ein optimales Füllen ist damit nur selten möglich.The disadvantage of purely static filling that this is very dependent on the flow rate of the water, which greatly influences an exact demand-dependent filling. If there is too little water in the machine, the circulation pump takes air and goes into a noisy "snorkelling" mode. If you fill more water in order to prevent this noise, this affects other operating parameters - especially the consumption values for energy and water - in a negative way. An optimal filling is thus rarely possible.

Beim dynamischen Füllen benutzt man einen Druckwächter oderFor dynamic filling, use a pressure switch or

Drucksensor, um ein bestimmtes Wasserniveau zu erreichen. Solange der Schaltpunkt einer bestimmten Fülldrehzahl nicht erreicht wurde, bleibt das Wasserventil der Maschine geöffnet. Damit ist die benötigte Wassermenge sehr genau einstellbar.Pressure sensor to reach a certain water level. As long as the switching point of a certain filling speed has not been reached, the water valve of the machine remains open. Thus, the required amount of water is very precisely adjustable.

Allerdings hat diese Füllstrategie folgenden Nachteil: Bekannte Pumpen werden stets nur im Ein/Aus-Betrieb gefahren, d. h. die Pumpe wird immer so angesteuert, dass sie im aktivierten Zustand stets mit ihrer vorgegebenen Maximaldrehzahl arbeitet. Dabei ergibt sich, dass die Pumpe beim Einschalten schneller auf die gewünschte Maximaldrehzahl hoch beschleunigt, als es der Wasserstand für einen nicht "schnorchelnden" Betrieb zulassen würde.However, this filling strategy has the following disadvantage: Known pumps are always driven only in on / off operation, d. H. the pump is always controlled so that it always operates at its maximum speed when activated. It turns out that the pump accelerates faster when switching on to the desired maximum speed, as it would allow the water level for a not "snorkeling" operation.

Dabei einsteht ein unerwünschtes Geräusch, das als sehr störend empfunden wird.In doing so, there is an unwanted noise, which is perceived as very disturbing.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, ein Verfahren zum Füllen des Arbeitsraums einer gattungsgemäßen Haushaltsmaschine sowie eine Haushaltsmaschine vorzuschlagen, mit dem bzw. mit der es möglich ist, ein verbessertes Laufverhalten der Pumpe sicherzustellen; insbesondere soll verhindert werden, dass unerwünschte Geräusche beim Betrieb der Pumpe entstehen.Proceeding from this, the present invention seeks to propose a method for filling the working space of a generic household appliance and a household appliance, with which it is possible or to ensure an improved running behavior of the pump; In particular, it should be prevented that unwanted noise during operation of the pump arise.

Die Lösung dieser Aufgabe durch die Erfindung ist verfahrensgemäß dadurch gekennzeichnet, dass das Wasser einer Pumpe zugeleitet und mittels der Pumpe in den Arbeitsraum der Haushaltsmaschine gefördert wird, dass die Pumpe als eine in ihrer Drehgeschwindigkeit gemäß einem vorgebbaren Funktionsverlauf regelbare Pumpe ausgebildet ist, und dass die Drehgeschwindigkeit bzw. Drehzahl der Pumpe der Zulaufgeschwindigkeit, also dem Volumenstrom pro Zeit, des Wassers in den der Pumpe vorgelagerten Bereich angepasst wird.The solution of this problem by the invention according to the method is characterized in that the water is fed to a pump and conveyed by the pump in the working space of the household machine, that the pump is designed as a controllable in its rotational speed according to a predetermined function curve pump is, and that the rotational speed or speed of the pump, the feed rate, ie the flow rate per time, the water is adjusted in the region upstream of the pump.

Bevorzugt ist vorgesehen, dass die Drehgeschwindigkeit der Pumpe beim Füllen des Arbeitsraumes von Null bis zu einer maximalen Drehgeschwindigkeit im wesentlichen linear gesteigert wird. Dabei kann dann insbesondere der Verlauf der sich ergebenden Rampenfunktion der Drehgeschwindigkeit der Pumpe so gewählt werden, dass der Pumpe ein ausreichendes Wasserangebot für einen Betrieb nahezu ohne Luftblasen zur Verfügung steht.It is preferably provided that the rotational speed of the pump when filling the working space is increased from zero to a maximum rotational speed substantially linear. In this case, in particular the course of the resulting ramp function of the rotational speed of the pump can be selected so that the pump is a sufficient supply of water for operation with virtually no air bubbles available.

Mit Vorteil erfolgt die Festlegung des Funktionsverlaufs der Drehgeschwindigkeit der Pumpe unter Zugrundelegung der einmalig gemessenen Zulaufgeschwindigkeit des Wassers in den der Pumpe vorgelagerten Bereich.Advantageously, the definition of the function curve of the rotational speed of the pump takes place on the basis of the once measured flow speed of the water in the region upstream of the pump.

Weiterhin hat es sich als sehr vorteilhaft erwiesen, dass die Drehgeschwindigkeit der Pumpe in Abhängigkeit der Zulaufgeschwindigkeit des Wassers angepasst wird, die von einem im der Pumpe vorgelagerten Bereich angeordneten Zulaufgeschwindigkeitsmesselement, insbesondere einem Flügelradzähler, ermittelt wird.Furthermore, it has proven to be very advantageous for the rotational speed of the pump to be adjusted as a function of the feed rate of the water, which is determined by a feed speed measuring element arranged in the region upstream of the pump, in particular an impeller counter.

Die Haushaltsmaschine, der Wasser von einem Wasserhahn über einen Schlauch zugeführt wird oder zuführbar ist, ist gekennzeichnet durch eine Pumpe, der das Wasser zugeleitet wird oder zuleitbar ist, und einen Arbeitsraum , der mittels der Pumpe befüllt werden kann, wobei die Pumpe als eine in ihrer Drehgeschwindigkeit gemäß einem vorgebbaren Funktionsverlauf regelbare Pumpe ausgebildet ist.The household machine, the water is supplied from a faucet via a hose or is supplied, is characterized by a pump, which is supplied to the water or feedable, and a working space that can be filled by means of the pump, the pump as a pump controllable in terms of its rotational speed in accordance with a predeterminable functional profile is formed.

Dabei kann im der Pumpe vorgelagerten Bereich ein Zulaufgeschwindigkeitsmesselement angeordnet sein, das zur Bestimmung der Zulaufgeschwindigkeit des Wassers in die Pumpe geeignet ist; als Zulaufgeschwindigkeitsmesselement kommt bevorzugt ein Flügelradzähler zum Einsatz.In this case, a Zulaufgeschwindigkeitsmesselement can be arranged in the region upstream of the pump, which is suitable for determining the feed rate of the water in the pump; An inflow speed measuring element is preferably an impeller counter.

Ferner können Steuerungs- oder Regelungsmittel vorgesehen sein, die zur Ansteuerung der Drehgeschwindigkeit der Pumpe geeignet sind und als Eingangssignal die vom Zulaufgeschwindigkeitsmesselement ermittelte Zulaufgeschwindigkeit erhalten.Furthermore, control or regulating means may be provided which are suitable for controlling the rotational speed of the pump and which receive as input the flow velocity determined by the inlet velocity measuring element.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Es zeigen:

Fig. 1
schematisch eine Waschmaschine in der Vorderansicht,
Fig. 2
eine zu Fig. 1 alternative Ausgestaltung und
Fig. 3
beispielhaft den Verlauf der Drehgeschwindigkeit n der Pumpe über der Zeit t.
In the drawings, embodiments of the invention are shown. Show it:
Fig. 1
schematically a washing machine in front view,
Fig. 2
one too Fig. 1 alternative embodiment and
Fig. 3
as an example the course of the rotational speed n of the pump over the time t.

In Fig. 1 ist eine Haushaltsmaschine 2 in Form einer Waschmaschine skizziert, die einen Arbeitsraum 1 aufweist, der zum Waschen mit Wasser gefüllt werden muss. Das Wasser wird von einem Wasserhahn 7 über einen Schlauch 8 der Waschmaschine 2 zugeführt. Am Ende des Schlauchs 8 wird das Wasser über ein nicht bezeichnetes Rohrstück einer Pumpe 3 zugeleitet, die elektrisch betrieben ist. Sie fördert mit einer vorgebbaren Drehgeschwindigkeit bzw. Drehzahl n das Wasser in den Arbeitsraum 1.In Fig. 1 a household machine 2 is sketched in the form of a washing machine, which has a working space 1, which must be filled for washing with water. The water is supplied from a tap 7 via a hose 8 of the washing machine 2. At the end of the hose 8, the water is fed via an unspecified pipe section of a pump 3, which is electrically operated. It promotes the water into the working space 1 with a predefinable rotational speed or speed n.

Zur Vermeidung unerwünschter Geräusche beim Fördern von Wasser durch die Pumpe 3 wird wie folgt vorgegangen:To avoid unwanted noise when pumping water through the pump 3, the procedure is as follows:

Zunächst lässt man statisch Wasser bis zum Schaltpunkt eines nicht dargestellten Druckwächters bzw. Drucksensors zulaufen und misst die Zeit bis zum Erreichen desselben. Dadurch ermittelt man eine durch die Festlegung des Schaltpunktes relativ genaue Wassermenge und die zum Füllen dieser Menge benötige Zeit. Hieraus lässt sich wiederum die Zulaufgeschwindigkeit Q (Volumen pro Zeit) des Wassers errechnen.First, static water is allowed to run in until the switching point of a pressure monitor or pressure sensor, not shown, and measures the time until it reaches the same. This determines a relatively accurate by the determination of the switching point amount of water and the time required to fill this amount. From this, in turn, the feed rate Q (volume per time) of the water can be calculated.

Die Pumpe 3 ist als regelbare Pumpe ausgebildet, d. h. der Verlauf der Drehgeschwindigkeit n als Funktion der Zeit t kann der Pumpe 3 gezielt vorgegeben werden. Damit ist es möglich, die Pumpe mit einem Drehgeschwindigkeits-ZeitProfil zu beaufschlagen, wie es beispielhaft in Fig. 3 skizziert ist. Wie hier zu erkennen ist, wird die Drehgeschwindigkeit n der Pumpe 3 zum Zeitpunkt Null beginnend linear hochgefahren, bis eine maximale Drehgeschwindigkeit nmax erreicht ist; es ergibt sich eine "Rampenfunktion". Beim Anlauf der Pumpe 3 kann also ein gewünschtes Anlaufverhalten, d. h. eine gewünschte "Rampenfunktion", vorgegeben werden, bis die Zieldrehzahl nmax erreicht ist. Dies erfolgt erfindungsgemäß in Abhängigkeit der Zulaufgeschwindigkeit Q des Wassers in den der Pumpe 3 - in Fließrichtung des Wassers gesehen - vorgelagerten Bereich 4.The pump 3 is designed as a controllable pump, that is, the course of the rotational speed n as a function of the time t, the pump 3 can be specified. Thus, it is possible to apply the pump with a rotational speed-time profile, as exemplified in Fig. 3 outlined. As can be seen here, the rotational speed n of the pump 3 is raised linearly beginning at time zero, until a maximum rotational speed n max is reached; This results in a "ramp function". When starting the pump 3, therefore, a desired start-up behavior, ie, a desired "ramp function", can be specified until the target speed n max is reached. This is done according to the invention as a function of the feed rate Q of the water in the pump 3 - seen in the flow direction of the water - upstream region. 4

Dabei wird die Steigung der in Fig. 3 skizzierten "Anlauframpe" so festgelegt, dass ein kritisches Wasserniveau, bei dem die Pumpe 3 Luft ziehen und fördern würde - was die unerwünschten Geräusche verursacht -, vermieden wird.The slope of the in Fig. 3 "starting ramp" is set so as to avoid a critical water level at which the pump 3 would draw and convey air - which causes the unwanted noise.

Somit wird der Anstieg der Pumpen-Drehgeschwindigkeit n geräuschoptimiert an die Wasserzulaufgeschwindigkeit Q angepasst.Thus, the increase of the pump rotation speed n is adjusted to the water supply speed Q in a noise optimized manner.

In Fig. 3 ist ein kritischer Bereich 9 skizziert, der andeuten soll, dass die Pumpe 3 dann, wenn die Drehgeschwindigkeit n zu schnell hochgefahren wird, in den "schnorchelnden" Betrieb geraten würde, was es erfindungsgemäß zu vermeiden gilt.In Fig. 3 is a critical area outlined 9, which is intended to suggest that the pump 3 would then, if the rotational speed n is ramped up too fast, in the "snorkeling" operation would get what it should be avoided according to the invention.

In Fig. 2 ist eine weitergehende Ausgestaltung der Erfindung skizziert. Am Ende des Schlauchs 8 ist ein Zulaufgeschwindigkeitsmesselement 5 in Form eines Flügelradzählers angeordnet. Mit diesem kann die. Zulaufgeschwindigkeit Q des Wassers in die Waschmaschine 2 direkt gemessen werden. Das vom Flügelradzähler 5 gemessene Signal für die Zulaufgeschwindigkeit Q wird einem Steuerung- oder Regelungsmittel 6 zugeleitet. In diesem ist der zulässige Funktionsverlauf der Drehgeschwindigkeit n als Funktion der Zeit t in Abhängigkeit der Zulaufgeschwindigkeit Q hinterlegt, d. h. abgespeichert. Das Steuerungs- oder Regelungsmittel 6 ist daher in der Lage, die Pumpe 3 so anzusteuern, dass der zulässige Betriebsbereich nicht verlassen wird, d. h. dass insbesondere der in Fig. 3 skizzierte kritische Bereich 9 nicht erreicht wird.In Fig. 2 a further embodiment of the invention is outlined. At the end of the tube 8 a Zulaufgeschwindigkeitsmesselement 5 is arranged in the form of a Flügelradzählers. With this, the. Feed rate Q of the water in the washing machine 2 are measured directly. The measured by the impeller 5 signal for the feed rate Q is fed to a control or regulating means 6. In this, the permissible function curve of the rotational speed n is stored as a function of the time t as a function of the feed rate Q, ie stored. The control or regulating means 6 is therefore able to control the pump 3 so that the permissible operating range is not left, ie that in particular the in Fig. 3 sketched critical area 9 is not reached.

Bei der Ausgestaltung der Drehgeschwindigkeit-Zeit-Funktion gemäß Fig. 3 kann also die Zulaufgeschwindigkeit Q direkt zur Bestimmung der Anlaufgeschwindigkeit bzw. der Drehbeschleunigung der Pumpe 3 verwendet werden.In the embodiment of the rotational speed-time function according to Fig. 3 Thus, the feed rate Q can be used directly to determine the startup speed or the rotational acceleration of the pump 3.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Arbeitsraumworking space
22
Haushaltsmaschine (Geschirrspülmaschine, Waschmaschine)Appliance machine (dishwasher, washing machine)
33
Pumpepump
44
der Pumpe vorgelagerter Bereichthe pump upstream area
55
Flügelradzähler (Zulaufgeschwindigkeitsmesselement)Impeller counter (inflow speed measuring element)
66
Steuerungs- oder RegelungsmittelControl or regulation means
77
Wasserhahnwater tap
88th
Schlauchtube
99
kritischer Bereichcritical area
n(t)n (t)
Drehgeschwindigkeit/DrehzahlRotational speed / speed
tt
ZeitTime
QQ
Zulaufgeschwindigkeit (Volumenstrom)Feed rate (volume flow)
nmax n max
maximale Drehgeschwindigkeit/Drehzahlmaximum speed of rotation / speed

Claims (9)

  1. Method for filling a work chamber (1) of a domestic appliance (2), in particular of a dishwasher or a washing machine, with water, wherein the water is supplied to the domestic appliance (2) from a water tap (7) via a hose (8), the water is led to a pump (3) and conveyed by means of the pump (3) into the work chamber (1) of the domestic appliance (2), characterised in that the pump is designed as a pump which can be regulated as regards its speed of rotation according to a presettable function course, and in that the speed of rotation (n(t)) of the pump (3) is adapted to the feed rate (Q) of the water to the region (4) upstream of the pump (3).
  2. Method according to claim 1, characterised in that the speed of rotation (n(t)) of the pump (3) during filling of the work chamber (1) is increased essentially linearly from zero to a maximum speed of rotation (nmax).
  3. Method according to claim 2, characterised in that the course of the resulting ramp function of the speed of rotation (n(t)) of the pump (3) is selected such that a sufficient water supply for cavitation-free operation is available for the pump (3).
  4. Method according to one of claims 1 to 3, characterised in that the establishing of the function course of the speed of rotation (n(t)) of the pump (3) is effected on the basis of the feed rate (Q) of the water to the region (4) upstream of the pump (3) that is measured one time.
  5. Method according to one of claims 1 to 4, characterised in that the speed of rotation (n(t)) of the pump (3) is adapted as a function of the feed rate (Q) of the water which is ascertained by a feed rate measuring element (5), in particular an impeller meter, arranged in the region (4) upstream of the pump (3).
  6. Domestic appliance (2), in particular dishwasher or washing machine, comprising a hose (8), to which water is supplied from a water tap (7) via the hose (8), having a pump (3), to which the water is led or can be led, and a work chamber (1) which can be filled by means of the pump (3), characterised in that the pump (3) is designed as a pump which can be regulated as regards its speed of rotation (n(t)) according to a presettable function course.
  7. Domestic appliance according to claim 6, characterised in that a feed rate measuring element (5), which is suitable for determining the feed rate (Q) of the water to the pump (3), is arranged in the region (4) upstream of the pump (3).
  8. Domestic appliance according to claim 7, characterised in that the feed rate measuring element (5) is an impeller meter.
  9. Domestic appliance according to claim 7 or 8, characterised by control means or regulating means (6) which are suitable to control the speed of rotation (n(t)) of the pump (3) and receive the feed rate (Q) of the water ascertained by the feed rate measuring element (5) as an input signal.
EP03017024A 2002-10-16 2003-07-26 Method for filling the workspace of a domestic appliance and domestic appliance Expired - Fee Related EP1411164B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10248268 2002-10-16
DE10248268A DE10248268A1 (en) 2002-10-16 2002-10-16 Method for filling the working space of a household machine and household machine

Publications (2)

Publication Number Publication Date
EP1411164A1 EP1411164A1 (en) 2004-04-21
EP1411164B1 true EP1411164B1 (en) 2011-12-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03017024A Expired - Fee Related EP1411164B1 (en) 2002-10-16 2003-07-26 Method for filling the workspace of a domestic appliance and domestic appliance

Country Status (3)

Country Link
EP (1) EP1411164B1 (en)
DE (2) DE10248268A1 (en)
ES (1) ES2378230T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783264A3 (en) * 2005-11-04 2008-10-15 Fisher & Paykel Appliances Ltd. Improvements relating to washing machines
EP1959043B1 (en) 2007-02-19 2018-11-14 Electrolux Home Products Corporation N.V. Domestic appliance with external water supply
BRPI0903480A2 (en) * 2009-09-18 2011-05-24 Whirlpool Sa pressurizer device for a washing machine and washing machine
DE102011000287B4 (en) * 2011-01-24 2014-09-11 Miele & Cie. Kg Method for adjusting a volume flow delivered by a circulating pump in a water-conducting domestic appliance
US10335012B2 (en) 2015-10-19 2019-07-02 Electrolux Home Products, Inc. Dishwasher spray fill

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024914A (en) * 1959-10-02 1962-03-13 Toledo Scale Corp Anti-vortex device for dishwashing machines
DE19748706A1 (en) * 1997-11-04 1999-05-06 Bosch Siemens Hausgeraete Automatically controlled washing machine with a lye circulation system
DE19828768C2 (en) 1998-06-27 2002-12-05 Aeg Hausgeraete Gmbh Method for operating a dishwasher with a circulation pump
DE10008318B4 (en) * 2000-08-10 2008-01-10 AEG Hausgeräte GmbH A water-conducting domestic appliance with an emptying system and method for filling and monitoring an emptying of a working container

Also Published As

Publication number Publication date
EP1411164A1 (en) 2004-04-21
DE10248268A1 (en) 2004-04-29
ES2378230T3 (en) 2012-04-10
DE20321884U1 (en) 2012-02-08

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