EP2348944B1 - Fluid pump - Google Patents

Fluid pump Download PDF

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Publication number
EP2348944B1
EP2348944B1 EP09778692.5A EP09778692A EP2348944B1 EP 2348944 B1 EP2348944 B1 EP 2348944B1 EP 09778692 A EP09778692 A EP 09778692A EP 2348944 B1 EP2348944 B1 EP 2348944B1
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EP
European Patent Office
Prior art keywords
pump
heating
electrical appliance
conveyor
domestic electrical
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Application number
EP09778692.5A
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German (de)
French (fr)
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EP2348944B2 (en
EP2348944A1 (en
Inventor
Volker Block
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EGO Elektro Geratebau GmbH
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EGO Elektro Geratebau GmbH
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Application filed by EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to PL09778692.5T priority Critical patent/PL2348944T5/en
Publication of EP2348944A1 publication Critical patent/EP2348944A1/en
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Classifications

    • 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 
    • D06F39/04—Heating arrangements
    • 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
    • A47L15/4225—Arrangements or adaption of recirculation or discharge 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
    • A47L15/4285—Water-heater arrangements
    • 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

Definitions

  • the invention relates to an electric household appliance with a pump or a water-conducting household appliance with a pump such as a dishwasher, a washing machine or a tumble dryer.
  • similar household electrical appliances are from the WO 2006/136819 A1 known.
  • a dishwasher or a washing machine can be operated for introducing and heating water into the interior during operation.
  • a hot tub with a heated pump known in accordance with FIG. 1 always an impeller is provided for conveying liquid.
  • a fan is provided in a housing of a motor as a conveyor for air, which also sits on the same motor shaft and is used for cooling a drive circuit and the motor.
  • a pump is shown with which both air and water can be pumped.
  • two conveyors are provided, namely a conveyor for water and a conveyor for air.
  • Another pump, for a whirlpool tub is from the US 4858255 A known.
  • a single drive motor drives a pump to circulate water with renewed heating.
  • the same drive motor of the pump also carries a separate conveyor for air, which is pumped into a tub in which the water is to generate the air blowing effect.
  • the invention has for its object to provide an aforementioned electric household appliance, which has extended operational and uses, is versatile and allows a particularly advantageous construction of an electric household appliance such as a dishwasher, a tumble dryer or a washing machine.
  • the pump arranged therein and a single conveyor of the pump, which is driven by the drive motor are designed such that both water and air can be pumped or conveyed therewith.
  • an operating mode of the pump or the drive motor can be varied so that the speed, in particular the rated operating speed is correspondingly different, in particular a high nominal operating speed in the promotion of air and a lower rated operating speed in the promotion of Water.
  • the pump or an associated pump housing have different suction points for air and for water.
  • these suction points each lead to the conveyor, advantageously adjacent areas.
  • the suction can each be closed, including, for example, valves, flaps or the like. can be provided.
  • the suction operation can be well controlled and the two suction areas and suction points can be separated from each other and closed.
  • the pump has different outlet points for air and water, which each lead away from the conveyor. Again, flaps, valves or the like. be provided for closing the departure points.
  • the points of departure are also preferably close to each other, but possibly only as a single point of departure.
  • the pump may advantageously have a rotating compressor.
  • a said compressor may be formed in principle similar to a known compressor.
  • it can have a plurality of compressor blades, the angle of attack of which can be adjusted. By this adjustment, an adaptation to the material to be promoted, so either air or water, are made for each best possible promotion.
  • An adjustment of the compressor blades can advantageously be carried out between two end positions without intermediate position in order to keep an adjusting mechanism as simple as possible.
  • An end position can have a relatively steep angle of attack for conveying air, in particular with a relatively high nominal operating speed.
  • Another end position may have a relatively shallow angle of attack to promote water, with a nominal operating speed being relatively low.
  • an adjustment mechanism for adjustable compressor blades may be speed-dependent. Thus, the compressor blades move accordingly without special activators by adjusting a low or high speed or go into their respective end position.
  • a heating which can serve both for heating the water and for heating the air, on the one hand can extend along an outer circumference of the housing.
  • the heating can rotate around a substantial area of the housing, in particular completely around the housing.
  • Such heating can for example also form an area of the wall of the pump or a pump chamber.
  • heating over a large area, in particular from both sides, can be surrounded by the fluid to be delivered, ie air or water, for the best possible heat release.
  • the heating is arranged rather centrally in a pump chamber.
  • combinations of the two above-described heaters are also conceivable, where one or both heaters can be activated depending on the fluid to be delivered and / or the target temperature.
  • a heating or a heating element thereof is designed so that it comes into direct contact with the fluid to be delivered. Thus, the best possible heating effect can be achieved.
  • heating can have layer heating elements, preferably thick-layer heating elements or thin-layer heating elements. These can, as is known per se, be applied to a flat carrier substrate. Alternatively, possibly also in addition, heating may comprise tubular heating elements or a heating element with heating wire. Since tubular heaters of this type are electrically insulated from the outside, they can extend directly into the fluid to be pumped or run within a pump chamber.
  • the heating has at least two separately controllable heating circuits.
  • To control these heating circuits can switch or relay be provided, wherein the heating power can be changed by different control or interconnection of the heating circuits, in particular variations of series and parallel circuits.
  • an adjustment of the heating power in different stages is considered sufficient.
  • a stepless change is not absolutely necessary, so that the circuit complexity can be reduced.
  • With an electronic control but can also be a continuous adjustment of the heating power, if desired.
  • a variable speed electric motor is used as a drive motor for the conveyor. As described above, it can deliver water at a relatively low rated operating speed since it requires significantly more power due to its greater density. For conveying air, the conveyor can run at a significantly higher rated operating speed, even with compressor blades set in the pitch angle.
  • An access to the conveyor from a suction point or from the two aforementioned suction points for air and water can advantageously take place centrally centrally along the axis of rotation of the conveyor. It may, for example, be provided that the two intake points of air and water arrive at this access from the outside and then open in the conveyor in a single opening. A departure from the conveyor to an aforementioned point of departure may be provided radially on the outside of the conveyor. However, this depends significantly on the basic design of the pump and should be adapted to it.
  • a device is provided to remove water from the pump and from the conveying path for fluid to be removed by the pump.
  • a valve may be provided on the pump or on a housing with the conveyor, advantageously, of course, at the lowest possible point. So on the one hand, the disturbing stagnation of residual water can be avoided with the resulting known hygiene problems. Further, for subsequent conveying of air, the efficiency of conveying with complete removal of water can be improved.
  • a second pump may be provided. This can be relatively simple and does not need a particularly large flow rate. Furthermore, it will always be used only for a short time. Alternatively, just some residual water can be selectively left in the pump, which can be used for lubrication of the motor or the drive of the pump, so the stock.
  • Fig. 1 is a highly schematic representation of a pump assembly 11 is shown.
  • This pump assembly 11 is installed in a water-conducting household appliance according to the invention, in particular in a dishwasher, advantageously under the washing chamber.
  • a dishwasher according to the invention is in Fig. 2 shown and below this will be executed even more.
  • the pump arrangement 11 has a pump 12, which has a pump housing 13 and a motor 15.
  • a motor shaft 16 extends from the motor 15 into the pump housing 13 and carries a conveyor 18 which rotates in a pump chamber 19 in the interior of the pump housing 13.
  • the connection of the pump housing 13 and the motor 15 is advantageous fixed, in particular it is a structural unit, the like or the like by releasable screw. of the motor 15 can be made to the pump housing 13. For fixing the pump 12 in a dishwasher, it may then be sufficient to provide attachment points on the pump housing 13 alone.
  • the conveyor 18 is advantageously designed conventionally in the version shown here and corresponds for example to a conveyor, as he from the DE 19903951 A1 is known, to which reference is expressly made. Furthermore, here is the representation of the dimension of the pump housing 13 and the other components not to scale.
  • the pump housing 13 or the pump chamber 19 has a pump access 21, which takes place centrally and axially. Furthermore, a pump outlet 23 is provided, which is arranged laterally or radially. Down to or advantageously at the lowest point of the pump chamber 19, an aforementioned pump drainage 25 is provided with a drain valve 26. By opening the drain valve 26 residual water can be removed from the pump housing 19.
  • the heater 28 shown is formed except for a corresponding, not shown interruption for the pump outlet 23 substantially cylinder-like or inside close to the inner wall of the pump chamber 19 circumferentially. It may be a thin-film or thick-film heating described above, wherein heating elements are arranged on at least one of its sides, advantageously the outside, possibly also on the other or both sides.
  • tubular heaters or the like. be provided, which run closer to the conveyor 18.
  • the pump housing 13 can be heated from the outside. However, this is easily feasible for the expert in the different variants.
  • a water intake point 31 is provided with a valve 32 for shutting off.
  • This Wasseransaugstelle 31 is connected to a conventional flow of a washing chamber of a dishwasher.
  • an air intake 34 is provided with a corresponding valve 35. Water intake 31 and air intake 34 meet in an intersection region 37, which is connected directly to the pump access 21.
  • the pump outlet 23 may, as it should be shown here, be connected to a single access in a washing chamber of the dishwasher.
  • two different dispensing points which can each be opened and closed by valves can be connected.
  • FIG. 2 schematically is a dishwasher 40 according to the invention shown in a lateral section.
  • the dishwasher 40 has an inner rinsing chamber 41 and to the access of a door 42. Inside the rinsing chamber 41 there are three rinsing arms 44a-c rotating in operation, which are supplied via a supply line 45.
  • the supply line 45 is connected to the pump outlet 23 and leads to each rinse arm 44. Possibly, valves may be provided here for selective access to individual rinse arms 44.
  • the Wasseransaugstelle 31 is connected in a manner not shown with a water outlet from the rinsing chamber 41 and, advantageously adjustable by valves, connected to a fresh water inlet.
  • the air intake 34 of the pump assembly 11 is connected to a fresh air supply, advantageously just an opening in the dishwasher 40.
  • the pump drainage 25 is connected to a conventional sewer line from the dishwasher 40.
  • the pump assembly 11 For operation of the pump assembly 11 is essentially to refer to the aforementioned.
  • the valve 35 and the dewatering valve 26 are closed, the valve 32 is opened at the water suction point 31 and the pump 12 is operated.
  • the engine 15 with a first rated operating speed which is the lower of two possible rated operating speeds.
  • the pumped and possibly heated with the heater 28 water leaves through the pump outlet 23, the pump 12 and is guided via the supply line 45 and the rinse arms 44 a-c in the interior of the washing chamber 41.
  • the motor 15 stops and the valve 32 is closed.
  • the pump housing 13 and the pump chamber 19 can run empty.
  • the drain valve 26 is closed again.
  • the valve 35 is opened at the air intake 34 and the motor 15 is operated at a second rated operating speed to convey by means of the conveyor 18 air and from the pump outlet 23 again via the supply line 45 and the rinse arms 44a-c in the interior of the To bring rinsing chamber.
  • This second nominal operating speed may be significantly higher than the aforementioned first rated operating speed, possibly two to three times higher.
  • the introduction of the air, which is heated to the heater 28, serves to dry the dishes towards the end of the rinsing process.
  • the pump assembly 11 then acts as a kind of hair dryer.
  • a synchronous motor If a synchronous motor is used as the motor, it can be speed-controlled. Such a synchronous motor then has no fixed rated operating speed, it can be easily set arbitrarily.
  • Fig. 1 Although illustrated rigid conveyor 18, which is formed substantially in accordance with the prior art, while it is clear that the conveying of air performed much less well or efficiently can be compared to a specially designed fan or fan. At the same time, however, a sufficiently good conveying of air is possible for applications such as, for example, dishwashers, in particular due to the significant increase in speed on the motor 15, so that the advantage by saving an additional fan by far outweighs.

Landscapes

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

Description

Anwendungsgebiet und Stand der TechnikField of application and state of the art

Die Erfindung betrifft ein Elektro-Haushaltsgerät mit einer Pumpe bzw. ein wasserführendes Haushaltsgerät mit einer Pumpe wie eine Geschirrspülmaschine, eine Waschmaschine oder einen Wäschetrockner.The invention relates to an electric household appliance with a pump or a water-conducting household appliance with a pump such as a dishwasher, a washing machine or a tumble dryer.

Ähnliche Elektro-Haushaltsgeräte sind beispielsweise aus der WO 2006/136819 A1 bekannt. Mit einer derartigen Pumpe kann eine Geschirrspülmaschine oder eine Waschmaschine betrieben werden zum Einbringen sowie Erhitzen von Wasser in das Innere bei Betrieb.For example, similar household electrical appliances are from the WO 2006/136819 A1 known. With such a pump, a dishwasher or a washing machine can be operated for introducing and heating water into the interior during operation.

Aus der WO 96/19672 A1 ist ein Whirlpool mit einer beheizten Pumpe bekannt, bei der gemäß Figur 1 immer ein Impeller vorgesehen ist zum Fördern von Flüssigkeit. Gemäß Figur 5 ist in einem Gehäuse eines Motors auch ein Ventilator als Förderer für Luft vorgesehen, der auch auf derselben Motorwelle sitzt und zur Kühlung einer Ansteuerschaltung und des Motors dient. Somit ist eine Pumpe gezeigt, mit der sowohl Luft als auch Wasser gepumpt werden können. Allerdings sind dafür zwei Förderer vorgesehen, nämlich ein Förderer für Wasser und ein Förderer für Luft.From the WO 96/19672 A1 is a hot tub with a heated pump known in accordance with FIG. 1 always an impeller is provided for conveying liquid. According to Figure 5, a fan is provided in a housing of a motor as a conveyor for air, which also sits on the same motor shaft and is used for cooling a drive circuit and the motor. Thus, a pump is shown with which both air and water can be pumped. However, two conveyors are provided, namely a conveyor for water and a conveyor for air.

Eine weitere Pumpe, und zwar für eine Whirlpool-Wanne, ist aus der US 4858255 A bekannt. Hier treibt ein einziger Antriebsmotor eine Pumpe zum Zirkulieren von Wasser mit erneutem Aufheizen an. Derselbe Antriebsmotor der Pumpe trägt auch einen separaten Förderer für Luft, die zum Erzeugen der Luftsprudelwirkung in eine Wanne, in der sich das Wasser befindet, hinein gepumpt wird.Another pump, for a whirlpool tub, is from the US 4858255 A known. Here, a single drive motor drives a pump to circulate water with renewed heating. The same drive motor of the pump also carries a separate conveyor for air, which is pumped into a tub in which the water is to generate the air blowing effect.

Aus der US 2005/0201878 A1 und der WO 2006/136819 A1 sind Impellerpumpen für Elektro-Haushaltsgeräte bekannt, die eine Beheizung aufweisen. Beide Pumpen weisen eine axiale Ansaugstelle und eine radiale Abgangsstelle für zu förderndes Wasser auf.From the US 2005/0201878 A1 and the WO 2006/136819 A1 are known impeller pumps for household electrical appliances that have a heating exhibit. Both pumps have an axial suction point and a radial point of departure for water to be pumped.

Aufgabe und LösungTask and solution

Der Erfindung liegt die Aufgabe zugrunde, ein eingangs genanntes Elektro-Haushaltsgerät zu schaffen, das erweiterte Betriebs- und Einsatzmöglichkeiten aufweist, vielseitig einsetzbar ist und eine besonders vorteilhafte Konstruktion eines Elektro-Haushaltsgeräts wie einer Geschirrspülmaschine, einem Wäschetrockner oder einer Waschmaschine ermöglicht.The invention has for its object to provide an aforementioned electric household appliance, which has extended operational and uses, is versatile and allows a particularly advantageous construction of an electric household appliance such as a dishwasher, a tumble dryer or a washing machine.

Gelöst wird diese Aufgabe durch ein Elektro-Haushaltsgeräte mit einer Pumpe mit den Merkmalen des Anspruchs 1. Vorteilhafte sowie bevorzugte Ausgestaltungen der Erfindung sind Gegenstand der weiteren Ansprüche und werden im folgenden näher erläutert. Der Wortlaut der Ansprüche wird durch ausdrückliche Bezugnahme zum Inhalt der Beschreibung gemacht.This object is achieved by an electric household appliances with a pump having the features of claim 1. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. The wording of the claims is incorporated herein by express reference.

Erfindungsgemäß sind bei einem solchen Elektro-Haushaltsgerät die darin angeordnete Pumpe und ein einziger Förderer der Pumpe, der von dem Antriebsmotor angetrieben wird, derart ausgebildet, dass damit sowohl Wasser als auch Luft gepumpt bzw. gefördert werden können. Hierzu kann beispielsweise eine Betriebsart der Pumpe bzw. des Antriebsmotors so variiert werden, dass die Drehzahl, insbesondere die Nenn-Betriebsdrehzahl, entsprechend unterschiedlich ist, insbesondere eine hohe Nenn-Betriebsdrehzahl bei der Förderung von Luft und eine niedrigere Nenn-Betriebsdrehzahl bei der Förderung von Wasser. Zu diesen Möglichkeiten wird nachfolgend noch näheres ausgeführt.According to the invention, in such a household electric appliance, the pump arranged therein and a single conveyor of the pump, which is driven by the drive motor, are designed such that both water and air can be pumped or conveyed therewith. For this purpose, for example, an operating mode of the pump or the drive motor can be varied so that the speed, in particular the rated operating speed is correspondingly different, in particular a high nominal operating speed in the promotion of air and a lower rated operating speed in the promotion of Water. These options will be explained in more detail below.

Durch diesen möglichen Kombinationsbetrieb der Pumpe bzw. durch diese beiden Verwendungen kann vorteilhaft in einer Geschirrspülmaschine auf einen separaten Ventilator bzw. Förderer für Luft in das Innere der Geschirrspülmaschine hinein verzichtet werden, um gespültes Geschirr zu trocknen bzw. heiße Luft in die Geschirrspülmaschine zum Trocknen des Geschirrs einzublasen. Derzeit wird meistens das Innere der Geschirrspülmaschine durch einen frei liegenden Rohrheizkörper beheizt, also noch nicht einmal die Luft umgewälzt oder verteilt. So ergibt sich durch die Erfindung nicht nur eine erhebliche konstruktive Vereinfachung des wasserführenden Elektro-Haushaltsgeräts, insbesondere einer Geschirrspülmaschine, sondern auch eine erheblich verbesserte Funktion. Vor allem können auch die Kosten gesenkt werden und die Anzahl der ausfallgefährdeten Komponenten kann reduziert werden. Durch das Wegfallen eines weiteren Lüfters kann auch ein kompakterer Aufbau erreicht werden oder aber mehr Platz im Inneren des Gerätes.Through this possible combination operation of the pump or by these two uses can advantageously in a dishwasher to a separate fan or conveyor for air in the Inside the dishwasher be omitted inside to dry washed dishes or blow hot air into the dishwasher to dry the dishes. Currently, most of the interior of the dishwasher is heated by an exposed tubular heater, so not even circulated or distributed the air. Thus, the invention results not only in a considerable structural simplification of the water-conducting domestic appliance, in particular a dishwasher, but also a considerably improved function. Above all, the costs can be reduced and the number of components at risk of failure can be reduced. By eliminating another fan, a more compact design can be achieved or more space inside the device.

Bei der Erfindung ist vorgesehen, dass die Pumpe bzw. ein zugehöriges Pumpengehäuse unterschiedliche Ansaugstellen für Luft und für Wasser aufweisen. Diese Ansaugstellen führen natürlich jeweils zu dem Förderer hin, vorteilhaft an benachbarten Bereichen. Besonders vorteilhaft können die Ansaugstellen jeweils verschlossen werden, wozu beispielsweise Ventile, Klappen odgl. vorgesehen sein können. So kann der Ansaugbetrieb gut gesteuert werden und die beiden Ansaugbereiche bzw. Ansaugstellen können voneinander abgetrennt und verschlossen werden.In the invention, it is provided that the pump or an associated pump housing have different suction points for air and for water. Of course, these suction points each lead to the conveyor, advantageously adjacent areas. Particularly advantageously, the suction can each be closed, including, for example, valves, flaps or the like. can be provided. Thus, the suction operation can be well controlled and the two suction areas and suction points can be separated from each other and closed.

In alternativer oder zusätzlicher Weiterbildung der Erfindung ist ähnlich wie vorstehend beschrieben vorgesehen, dass die Pumpe unterschiedliche Abgangsstellen für Luft und Wasser aufweist, die jeweils von dem Förderer weg führen. Auch hier können Klappen, Ventile odgl. zum Verschließen der Abgangsstellen vorgesehen sein. Auch die Abgangsstellen sind bevorzugt nahe beieinander vorgesehen, möglicherweise aber auch nur als eine einzige Abgangsstelle.In an alternative or additional development of the invention, as described above, it is provided that the pump has different outlet points for air and water, which each lead away from the conveyor. Again, flaps, valves or the like. be provided for closing the departure points. The points of departure are also preferably close to each other, but possibly only as a single point of departure.

Als Förderer kann die Pumpe vorteilhaft einen rotierenden Verdichter aufweisen. Besonders vorteilhaft ist sie als Radialpumpe ausgebildet, wobei ein genannter Verdichter prinzipiell ähnlich wie ein bekannter Verdichter ausgebildet sein kann. Er kann in möglicher Weiterbildung der Erfindung mehrere Verdichterblätter aufweisen, deren Anstellwinkel verstellt werden können. Durch diese Verstellung kann eine Anpassung an das zu fördernde Gut, also entweder Luft oder Wasser, vorgenommen werden für eine jeweils möglichst gute Förderung. Eine Verstellung der Verdichterblätter kann vorteilhaft zwischen zwei Endstellungen ohne Zwischenstellung erfolgen, um einen Verstellmechanismus möglichst einfach zu halten. Eine Endstellung kann einen relativ steilen Anstellwinkel aufweisen zur Förderung von Luft, insbesondere mit einer relativ hohen Nenn-Betriebsdrehzahl. Eine andere Endstellung kann einen relativ flachen Anstellwinkel aufweisen, um Wasser zu fördern, wobei hier eine Nenn-Betriebsdrehzahl eher relativ niedrig liegt. In Ausgestaltung der Erfindung kann ein Verstellmechanismus für verstellbare Verdichterblätter drehzahlabhängig ausgebildet sein. So bewegen sich die Verdichterblätter entsprechend ohne spezielle Aktivierungsmittel durch Einstellen einer niedrigen oder hohen Drehzahl bzw. gehen in die jeweils zugehörige Endstellung.As a conveyor, the pump may advantageously have a rotating compressor. Particularly advantageous it is designed as a radial pump, wherein a said compressor may be formed in principle similar to a known compressor. In a possible development of the invention, it can have a plurality of compressor blades, the angle of attack of which can be adjusted. By this adjustment, an adaptation to the material to be promoted, so either air or water, are made for each best possible promotion. An adjustment of the compressor blades can advantageously be carried out between two end positions without intermediate position in order to keep an adjusting mechanism as simple as possible. An end position can have a relatively steep angle of attack for conveying air, in particular with a relatively high nominal operating speed. Another end position may have a relatively shallow angle of attack to promote water, with a nominal operating speed being relatively low. In an embodiment of the invention, an adjustment mechanism for adjustable compressor blades may be speed-dependent. Thus, the compressor blades move accordingly without special activators by adjusting a low or high speed or go into their respective end position.

Eine Beheizung, die sowohl zum Erwärmen des Wassers als auch zum Erwärmen der Luft dienen kann, kann einerseits entlang eines Außenumfangs des Gehäuses verlaufen. Dabei kann die Beheizung um einen wesentlichen Bereich des Gehäuses umlaufen, insbesondere vollständig um das Gehäuse. Eine solche Beheizung kann beispielsweise auch einen Bereich der Wand der Pumpe bzw. einer Pumpenkammer bilden. Alternativ kann eine Beheizung großflächig, insbesondere von beiden Seiten, von dem zu fördernden Fluid, also Luft oder Wasser, umgeben sein für eine möglichst gute Wärmeabgabe. In diesem Fall ist die Beheizung eher mittig in einer Pumpenkammer angeordnet. In möglicher Ausgestaltung der Erfindung sind auch Kombinationen der beiden vorbeschriebenen Beheizungen denkbar, wo je nach zu förderndem Fluid und/oder Zieltemperatur eine oder beide Beheizungen aktiviert werden können. In vorteilhafter Ausgestaltung der Erfindung ist eine Beheizung bzw. ein Heizelement davon so ausgebildet, dass es mit dem zu fördernden Fluid direkt in Kontakt kommt. So kann eine möglichst gute Heizwirkung erreicht werden.A heating, which can serve both for heating the water and for heating the air, on the one hand can extend along an outer circumference of the housing. In this case, the heating can rotate around a substantial area of the housing, in particular completely around the housing. Such heating can for example also form an area of the wall of the pump or a pump chamber. Alternatively, heating over a large area, in particular from both sides, can be surrounded by the fluid to be delivered, ie air or water, for the best possible heat release. In this case, the heating is arranged rather centrally in a pump chamber. In a possible embodiment of the invention, combinations of the two above-described heaters are also conceivable, where one or both heaters can be activated depending on the fluid to be delivered and / or the target temperature. In an advantageous embodiment of the invention, a heating or a heating element thereof is designed so that it comes into direct contact with the fluid to be delivered. Thus, the best possible heating effect can be achieved.

Eine Beheizung kann in einer Ausführung der Erfindung Schichtheizelemente aufweisen, vorzugsweise Dickschicht-Heizelemente oder Dünnschicht-Heizelemente. Diese können, wie es an sich bekannt ist, auf ein flächiges Trägersubstrat aufgebracht werden. Alternativ, möglicherweise auch zusätzlich, kann eine Beheizung Rohrheizkörper bzw. einen Heizkörper mit Heizdraht aufweisen. Da derartige Rohrheizkörper nach außen elektrisch isoliert sind, können sie direkt in das zu fördernde Fluid reichen bzw. innerhalb einer Pumpenkammer verlaufen.In one embodiment of the invention, heating can have layer heating elements, preferably thick-layer heating elements or thin-layer heating elements. These can, as is known per se, be applied to a flat carrier substrate. Alternatively, possibly also in addition, heating may comprise tubular heating elements or a heating element with heating wire. Since tubular heaters of this type are electrically insulated from the outside, they can extend directly into the fluid to be pumped or run within a pump chamber.

Um mehrere Beheizungen an der Pumpe vorzusehen ist es möglich, dass die Beheizung mindestens zwei getrennt ansteuerbare Heizkreise aufweist. Zur Ansteuerung dieser Heizkreise können Schalter bzw. Relais vorgesehen sein, wobei die Heizleistung durch unterschiedliche Ansteuerung bzw. Zusammenschaltung der Heizkreise, insbesondere Variationen von Reihen- und Parallelschaltungen, verändert werden kann. Hier wird eine Einstellung der Heizleistung in verschiedenen Stufen als ausreichend angesehen. Eine stufenlose Veränderung ist nicht zwingend notwendig, so dass der Schaltungsaufwand reduziert werden kann. Mit einer elektronischen Ansteuerung kann aber auch eine stufenlose Einstellung der Heizleistung erfolgen, falls dies gewünscht ist.To provide several heaters to the pump, it is possible that the heating has at least two separately controllable heating circuits. To control these heating circuits can switch or relay be provided, wherein the heating power can be changed by different control or interconnection of the heating circuits, in particular variations of series and parallel circuits. Here, an adjustment of the heating power in different stages is considered sufficient. A stepless change is not absolutely necessary, so that the circuit complexity can be reduced. With an electronic control but can also be a continuous adjustment of the heating power, if desired.

Als Antriebsmotor für den Förderer wird vorteilhaft ein drehzahlgeregelter Elektromotor verwendet. Wie zuvor beschrieben kann er mit einer relativ niedrigen Nenn-Betriebsdrehzahl Wasser fördern, da dieses aufgrund seiner größeren Dichte erheblich mehr Leistung benötigt. Zur Förderung von Luft kann der Förderer, selbst mit im Anstellwinkel verstellten Verdichterblättern, mit einer erheblich höheren Nenn-Betriebsdrehzahl laufen.As a drive motor for the conveyor advantageously a variable speed electric motor is used. As described above, it can deliver water at a relatively low rated operating speed since it requires significantly more power due to its greater density. For conveying air, the conveyor can run at a significantly higher rated operating speed, even with compressor blades set in the pitch angle.

Ein Zugang zu dem Förderer von einer Ansaugstelle bzw. von den beiden vorgenannten Ansaugstellen für Luft und Wasser kann vorteilhaft mittig zentral entlang der Rotationsachse des Förderers erfolgen. Es kann beispielsweise vorgesehen sein, dass an diesem Zugang von außen die beiden Ansaugstellen von Luft und Wasser ankommen und dann in dem Förderer in einer einzigen Öffnung münden. Ein Abgang von dem Förderer zu einer vorgenannten Abgangsstelle kann radial außen am Förderer vorgesehen sein. Dies hängt aber maßgeblich von der grundsätzlichen Konstruktion der Pumpe ab und sollte daran angepasst sein.An access to the conveyor from a suction point or from the two aforementioned suction points for air and water can advantageously take place centrally centrally along the axis of rotation of the conveyor. It may, for example, be provided that the two intake points of air and water arrive at this access from the outside and then open in the conveyor in a single opening. A departure from the conveyor to an aforementioned point of departure may be provided radially on the outside of the conveyor. However, this depends significantly on the basic design of the pump and should be adapted to it.

Wenn eine Pumpe auf erfindungsgemäße Art und Weise in ein Elektro-Haushaltsgerät wie beispielsweise eine Geschirrspülmaschine, eine Waschmaschine oder einen Wäschetrockner eingebaut wird, so kann vorgesehen sein, dass eine Vorrichtung vorgesehen ist, um Wasser aus der Pumpe sowie aus dem Förderweg für Fluid durch die Pumpe zu entfernen. Dazu kann beispielsweise ein Ventil an der Pumpe bzw. an einem Gehäuse mit dem Förderer vorgesehen sein, vorteilhaft natürlich an einer möglichst tiefen Stelle. So kann zum einen das störende Stehenbleiben von Restwasser mit den sich daraus ergebenden bekannten hygienischen Problemen vermieden werden. Des weiteren kann für ein nachfolgendes Fördern von Luft die Effizienz des Förderns bei vollständigem Entfernen von Wasser verbessert werden. Hierzu kann in Weiterbildung der Erfindung, möglicherweise alternativ zu einem Ventil alleine, eine zweite Pumpe vorgesehen sein. Diese kann relativ einfach ausgebildet sein und braucht keine besonders große Förderleistung. Des weiteren wird sie stets nur kurzzeitig eingesetzt werden. Alternativ kann gerade etwas Restwasser gezielt in der Pumpe belassen werden, welches zur Schmierung des Motors bzw. des Antriebs der Pumpe, also der Lager, dienen kann.When a pump according to the invention is installed in an electric household appliance such as a dishwasher, a washing machine or a tumble dryer, it can be provided that a device is provided to remove water from the pump and from the conveying path for fluid to be removed by the pump. For this purpose, for example, a valve may be provided on the pump or on a housing with the conveyor, advantageously, of course, at the lowest possible point. So on the one hand, the disturbing stagnation of residual water can be avoided with the resulting known hygiene problems. Further, for subsequent conveying of air, the efficiency of conveying with complete removal of water can be improved. For this purpose, in a development of the invention, possibly as an alternative to a valve alone, a second pump may be provided. This can be relatively simple and does not need a particularly large flow rate. Furthermore, it will always be used only for a short time. Alternatively, just some residual water can be selectively left in the pump, which can be used for lubrication of the motor or the drive of the pump, so the stock.

Diese und weitere Merkmale gehen außer aus den Ansprüchen auch aus der Beschreibung und der Zeichnung hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei einer Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. Die Unterteilung der Anmeldung in einzelne Abschnitte sowie Zwischen-Überschriften beschränken die unter diesen gemachten Aussagen nicht in ihrer Allgemeingültigkeit.These and other features will become apparent from the claims but also from the description and the drawings, the individual features each alone or more in the form of sub-combinations in an embodiment of the invention and in other fields be realized and advantageous and protectable Represent embodiments for which protection is claimed here. The subdivision of the application into individual sections as well as intermediate headings does not restrict the general validity of the statements made thereunder.

Kurzbeschreibung der ZeichnungBrief description of the drawing

Ausführungsbeispiele der Erfindung sind in den Zeichnungen schematisch dargestellt und werden im Folgenden näher erläutert. In den Zeichnungen zeigen:

Fig. 1
eine Funktionsdarstellung einer Pumpe mit Beheizung und zwei Ansaugstellen für Luft und Wasser sowie einer Abgabestelle und
Fig. 2
eine erfindungsgemäße Geschirrspülmaschine mit einer solchen Pumpe.
Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings show:
Fig. 1
a functional representation of a pump with heating and two suction points for air and water and a delivery point and
Fig. 2
a dishwasher according to the invention with such a pump.

Detaillierte Beschreibung der AusführungsbeispieleDetailed description of the embodiments

In Fig. 1 ist in stark schematisierter Darstellung eine Pumpenanordnung 11 dargestellt. Diese Pumpenanordnung 11 ist in ein erfindungsgemäßes wasserführendes Elektro-Haushaltsgerät eingebaut, insbesondere in eine Geschirrspülmaschine, vorteilhaft unter deren Spülkammer. Eine solche erfindungsgemäße Geschirrspülmaschine ist in Fig. 2 dargestellt und nachfolgend wird hierzu noch mehr ausgeführt.In Fig. 1 is a highly schematic representation of a pump assembly 11 is shown. This pump assembly 11 is installed in a water-conducting household appliance according to the invention, in particular in a dishwasher, advantageously under the washing chamber. Such a dishwasher according to the invention is in Fig. 2 shown and below this will be executed even more.

Die Pumpenanordnung 11 weist eine Pumpe 12 auf, die ein Pumpengehäuse 13 sowie einen Motor 15 aufweist. Eine Motorachse 16 reicht von dem Motor 15 in das Pumpengehäuse 13 hinein und trägt einen Förderer 18, der sich in einer Pumpenkammer 19 im Inneren des Pumpengehäuses 13 dreht. Die Verbindung von Pumpengehäuse 13 und Motor 15 ist vorteilhaft fest, insbesondere ist es eine Baueinheit, die beispielsweise durch lösbare Schraubverbindung odgl. des Motors 15 an dem Pumpengehäuse 13 hergestellt werden kann. Zur Befestigung der Pumpe 12 in einer Geschirrspülmaschine kann es dann ausreichen, Befestigungspunkte an dem Pumpengehäuse 13 alleine vorzusehen.The pump arrangement 11 has a pump 12, which has a pump housing 13 and a motor 15. A motor shaft 16 extends from the motor 15 into the pump housing 13 and carries a conveyor 18 which rotates in a pump chamber 19 in the interior of the pump housing 13. The connection of the pump housing 13 and the motor 15 is advantageous fixed, in particular it is a structural unit, the like or the like by releasable screw. of the motor 15 can be made to the pump housing 13. For fixing the pump 12 in a dishwasher, it may then be sufficient to provide attachment points on the pump housing 13 alone.

Der Förderer 18 ist in der hier dargestellten Version vorteilhaft konventionell ausgebildet und entspricht beispielsweise einem Förderer, wie er aus der DE 19903951 A1 bekannt ist, auf die diesbezüglich ausdrücklich verwiesen wird. Des weiteren ist hier auch die Darstellung der Dimension von Pumpengehäuse 13 sowie der übrigen Bestandteile nicht maßstabsgetreu.The conveyor 18 is advantageously designed conventionally in the version shown here and corresponds for example to a conveyor, as he from the DE 19903951 A1 is known, to which reference is expressly made. Furthermore, here is the representation of the dimension of the pump housing 13 and the other components not to scale.

Das Pumpengehäuse 13 bzw. die Pumpenkammer 19 weist einen Pumpenzugang 21 auf, der mittig und axial erfolgt. Des weiteren ist ein Pumpenabgang 23 vorgesehen, der seitlich bzw. radial angeordnet ist. Nach unten zu bzw. vorteilhaft an der tiefsten Stelle der Pumpenkammer 19 ist eine vorgenannte Pumpenentwässerung 25 vorgesehen mit einem Entwässerungsventil 26. Durch Öffnen des Entwässerungsventils 26 kann Restwasser aus dem Pumpengehäuse 19 entfernt werden.The pump housing 13 or the pump chamber 19 has a pump access 21, which takes place centrally and axially. Furthermore, a pump outlet 23 is provided, which is arranged laterally or radially. Down to or advantageously at the lowest point of the pump chamber 19, an aforementioned pump drainage 25 is provided with a drain valve 26. By opening the drain valve 26 residual water can be removed from the pump housing 19.

Innerhalb der Pumpenkammer 19 verläuft eine Heizung 28 mit Heizungsanschlüssen 29, die aus dem Pumpengehäuse 13 herausgeführt sind. Die dargestellte Heizung 28 ist bis auf eine entsprechende, nicht dargestellte Unterbrechung für den Pumpenabgang 23 im wesentlichen zylinderartig bzw. innen nahe an der Innenwand der Pumpenkammer 19 umlaufend ausgebildet. Sie kann eine eingangs beschriebene Dünnschicht- oder Dickschichtheizung sein, wobei Heizelemente auf mindestens einer ihrer Seiten, vorteilhaft der Außenseite, angeordnet sind, eventuell auch an der anderen oder beiden Seiten. Alternativ zu einer solchen eher nahe der Pumpenkammerwandung verlaufenden Heizeinrichtung können auch Rohrheizkörper odgl. vorgesehen sein, die näher an dem Förderer 18 verlaufen. Alternativ kann das Pumpengehäuse 13 von außen beheizt werden. Dies ist aber für den Fachmann in den unterschiedlichen Varianten leicht realisierbar.Within the pump chamber 19 extends a heater 28 with heating connections 29, which are led out of the pump housing 13. The heater 28 shown is formed except for a corresponding, not shown interruption for the pump outlet 23 substantially cylinder-like or inside close to the inner wall of the pump chamber 19 circumferentially. It may be a thin-film or thick-film heating described above, wherein heating elements are arranged on at least one of its sides, advantageously the outside, possibly also on the other or both sides. As an alternative to such a heater running near the pump chamber wall, it is also possible to use tubular heaters or the like. be provided, which run closer to the conveyor 18. Alternatively, the pump housing 13 can be heated from the outside. However, this is easily feasible for the expert in the different variants.

Zu dem Pumpenzugang 21 ist noch zu sagen, dass er von zwei Ansaugstellen gespeist werden kann. Einerseits ist eine Wasseransaugstelle 31 vorgesehen mit einem Ventil 32 zum Absperren. Diese Wasseransaugstelle 31 ist mit einem üblichen Ablauf einer Spülkammer einer Geschirrspülmaschine verbunden. Des weiteren ist eine Luftansaugstelle 34 vorgesehen mit einem entsprechenden Ventil 35. Wasseransaugstelle 31 und Luftansaugstelle 34 treffen sich in einem Kreuzungsbereich 37, der direkt mit dem Pumpenzugang 21 verbunden ist. Wie eingangs erläutert worden ist, kann durch jeweiliges Öffnen und Schließen der Ventile 32 und 35 bestimmt werden, ob entweder Wasser an der Wasseransaugstelle 31 oder Luft an der Luftansaugstelle 34 angesaugt bzw. gefördert wird und dann an dem Pumpenabgang 23 abgegeben wird. Der Pumpenabgang 23 kann, was hier dargestellt sein soll, mit einem einzigen Zugang in eine Spülkammer der Geschirrspülmaschine verbunden sein. Dann wird sowohl gefördertes Wasser als auch Luft, insbesondere auch jeweils beheizt, auf dieselbe Art und Weise in die Spülkammer eingebracht. Alternativ können, falls hierfür unterschiedliche Zuführwege vorgesehen sein sollen, am Pumpenabgang 23 ähnlich wie am Pumpenzugang 21 zwei verschiedene, durch Ventile jeweils öffenbare und schließbare Abgabestellen angeschlossen sein.To the pump access 21 is to say that it can be fed by two suction points. On the one hand, a water intake point 31 is provided with a valve 32 for shutting off. This Wasseransaugstelle 31 is connected to a conventional flow of a washing chamber of a dishwasher. Furthermore, an air intake 34 is provided with a corresponding valve 35. Water intake 31 and air intake 34 meet in an intersection region 37, which is connected directly to the pump access 21. As explained above, by opening and closing the valves 32 and 35 respectively, it can be determined whether either water at the water intake point 31 or air is sucked or promoted at the air intake 34 and then discharged at the pump outlet 23. The pump outlet 23 may, as it should be shown here, be connected to a single access in a washing chamber of the dishwasher. Then both conveyed water and air, in particular also each heated, introduced in the same manner in the washing chamber. Alternatively, if different feed paths are to be provided for this, at the pump outlet 23, similar to the pump access 21, two different dispensing points which can each be opened and closed by valves can be connected.

In Fig. 2 ist schematisch eine erfindungsgemäße Geschirrspülmaschine 40 dargestellt in einem seitlichen Schnitt. Die Geschirrspülmaschine 40 weist eine innere Spülkammer 41 sowie zu deren Zugang eine Tür 42 auf. Im Inneren der Spülkammer 41 befinden sich drei im Betrieb rotierende Spülarme 44a-c, die über eine Zuleitung 45 versorgt werden. Die Zuleitung 45 ist an den Pumpenabgang 23 angeschlossen und führt zu jedem Spülarm 44. Möglicherweise können hier noch Ventile vorgesehen sein für einen selektiven Zugang zu einzelnen Spülarmen 44.In Fig. 2 schematically is a dishwasher 40 according to the invention shown in a lateral section. The dishwasher 40 has an inner rinsing chamber 41 and to the access of a door 42. Inside the rinsing chamber 41 there are three rinsing arms 44a-c rotating in operation, which are supplied via a supply line 45. The supply line 45 is connected to the pump outlet 23 and leads to each rinse arm 44. Possibly, valves may be provided here for selective access to individual rinse arms 44.

Die Wasseransaugstelle 31 ist auf nicht dargestellte Art und Weise mit einem Wasserauslass aus der Spülkammer 41 sowie, vorteilhaft durch Ventile umstellbar, mit einem Frischwasserzulauf verbunden. Die Luftansaugstelle 34 der Pumpenanordnung 11 ist an eine Frischluftzufuhr angeschlossen, vorteilhaft einfach eine Öffnung in der Geschirrspülmaschine 40. Die Pumpenentwässerung 25 ist mit einer üblichen Abwasserleitung aus der Geschirrspülmaschine 40 verbunden.The Wasseransaugstelle 31 is connected in a manner not shown with a water outlet from the rinsing chamber 41 and, advantageously adjustable by valves, connected to a fresh water inlet. The air intake 34 of the pump assembly 11 is connected to a fresh air supply, advantageously just an opening in the dishwasher 40. The pump drainage 25 is connected to a conventional sewer line from the dishwasher 40.

Zum Betrieb der Pumpenanordnung 11 ist im wesentlichen auf das eingangs Genannte zu verweisen. Zum Zuführen von Spülwasser in die Spülkammer 41 werden das Ventil 35 und das Entwässerungsventil 26 geschlossen, das Ventil 32 an der Wasseransaugstelle 31 geöffnet und die Pumpe 12 betrieben. Dazu kann der Motor 15 mit einer ersten Nenn-Betriebsdrehzahl betrieben werden, welche die niedrigere von zwei möglichen Nenn-Betriebsdrehzahlen ist. Das geförderte und möglicherweise mit der Heizung 28 aufgeheizte Wasser verlässt durch den Pumpenabgang 23 die Pumpe 12 und wird über die Zuleitung 45 und die Spülarme 44a-c in das Innere der Spülkammer 41 geleitet.For operation of the pump assembly 11 is essentially to refer to the aforementioned. For supplying rinse water into the rinsing chamber 41, the valve 35 and the dewatering valve 26 are closed, the valve 32 is opened at the water suction point 31 and the pump 12 is operated. For this purpose, the engine 15 with a first rated operating speed which is the lower of two possible rated operating speeds. The pumped and possibly heated with the heater 28 water leaves through the pump outlet 23, the pump 12 and is guided via the supply line 45 and the rinse arms 44 a-c in the interior of the washing chamber 41.

Soll nach Beendigung des gewünschten Pumpvorgangs von Wasser Luft gefördert werden, so stoppt der Motor 15 und das Ventil 32 wird geschlossen. Über Öffnen des Entwässerungsventils 26 kann das Pumpengehäuse 13 bzw. die Pumpenkammer 19 leer laufen. Anschließend wird das Entwässerungsventil 26 wieder geschlossen. Dann wird das Ventil 35 an der Luftansaugstelle 34 geöffnet und der Motor 15 mit einer zweiten Nenn-Betriebsdrehzahl betrieben, um mittels des Förderers 18 Luft zu fördern und aus dem Pumpenabgang 23 wieder über die Zuleitung 45 und die Spülarme 44a-c in das Innere der Spülkammer zu bringen. Diese zweite Nenn-Betriebsdrehzahl kann deutlich höher liegen als die vorgenannte erste Nenn-Betriebsdrehzahl, möglicherweise zweimal bis dreimal so hoch. Das Einbringen der Luft, die dazu mit der Heizung 28 aufgeheizt wird, dient zum Trocknen des Geschirrs gegen Ende des Spülvorgangs. Die Pumpenanordnung 11 wirkt dann wie eine Art Fön.If air is to be conveyed after the desired pumping operation has ended, the motor 15 stops and the valve 32 is closed. By opening the drain valve 26, the pump housing 13 and the pump chamber 19 can run empty. Subsequently, the drain valve 26 is closed again. Then, the valve 35 is opened at the air intake 34 and the motor 15 is operated at a second rated operating speed to convey by means of the conveyor 18 air and from the pump outlet 23 again via the supply line 45 and the rinse arms 44a-c in the interior of the To bring rinsing chamber. This second nominal operating speed may be significantly higher than the aforementioned first rated operating speed, possibly two to three times higher. The introduction of the air, which is heated to the heater 28, serves to dry the dishes towards the end of the rinsing process. The pump assembly 11 then acts as a kind of hair dryer.

In beiden Betriebsarten ist es einfach vorstellbar, wie durch Betrieb der Heizung 28 eine gewünschte Temperatur am geförderten Wasser bzw. der geförderten Luft erzeugt werden kann. Dies kann durch Temperatursensoren auch überwacht bzw. genau geregelt werden.In both modes, it is easy to imagine how by operation of the heater 28, a desired temperature at the pumped water or the conveyed air can be generated. This can also be monitored or precisely regulated by temperature sensors.

Wird als Motor ein Synchronmotor verwendet, so kann er drehzahlgesteuert sein. Ein solcher Synchronmotor hat dann keine feste Nenn-Betriebsdrehzahl, sie kann einfach beliebig eingestellt werden.If a synchronous motor is used as the motor, it can be speed-controlled. Such a synchronous motor then has no fixed rated operating speed, it can be easily set arbitrarily.

Bei einem in Fig. 1 dargestellten starr ausgebildeten Förderer 18, der im wesentlichen gemäß dem Stand der Technik ausgebildet ist, ist zwar klar, dass das Fördern von Luft weitaus weniger gut bzw. effizient durchgeführt werden kann im Vergleich zu einem speziell ausgebildeten Ventilator- bzw. Lüfterrad. Gleichzeitig ist aber ein für Anwendungen wie beispielsweise bei Geschirrspülmaschinen ausreichend gutes Fördern von Luft möglich, insbesondere durch die deutliche Drehzahlerhöhung an dem Motor 15, sodass der Vorteil durch die Einsparung eines zusätzlichen Lüfters bei weitem überwiegt.At an in Fig. 1 Although illustrated rigid conveyor 18, which is formed substantially in accordance with the prior art, while it is clear that the conveying of air performed much less well or efficiently can be compared to a specially designed fan or fan. At the same time, however, a sufficiently good conveying of air is possible for applications such as, for example, dishwashers, in particular due to the significant increase in speed on the motor 15, so that the advantage by saving an additional fan by far outweighs.

Claims (14)

  1. Domestic electrical appliance (40) having a pump (12) for fluids, wherein the pump (12) is disposed within the domestic electrical appliance and includes a drive motor (15) and a heating device (28) for heating the fluid during passage through the pump (12) and a single conveyor (18) driven by the drive motor (15), wherein the pump (12) and the single conveyor (18) are configured to pump both air and water,
    characterized in that
    the pump (12) has different intake positions (31, 34) for air and water, each leading towards the conveyor (18), and/or different discharge positions for air and water, each leading away from the conveyor (18).
  2. Domestic electrical appliance according to claim 1, characterized in that the intake positions (31, 34) are capable of being closed, in particular by means of valves (32, 35).
  3. Domestic electrical appliance according to claim 1 or 2, characterized in that the discharge positions are capable of being closed, in particular by means of valves.
  4. Domestic electrical appliance according to any of the preceding claims, characterized in that the conveyor (18) includes a rotating impeller, and in particular is a radial pump, wherein in particular the impeller includes a plurality of impeller blades, with the ascending angles thereof being adjustable, preferably adjustable between two final positions without an intermediate position, wherein one of the final positions has a steep angle for conveying of air and the other one of the final positions has a flat angle for conveying of water.
  5. Domestic electrical appliance according to any of the preceding claims, characterized in that the heating device (28) extends along an outer circumference of a housing (13), wherein the heating device (28) preferably is a heating device (28) extending circumferentially about an essential portion of the housing (13), in particular completely about the housing (13).
  6. Domestic electrical appliance according to any of the preceding claims, characterized in that the heating device (28) is extensively, in particular essentially completely, surrounded by the fluid to be conveyed.
  7. Domestic electrical appliance according to any of the preceding claims, characterized in that the heating device (28) and a heating element of the heating device (28), respectively, makes direct contact to the fluid to be conveyed.
  8. Domestic electrical appliance according to any of the preceding claims, characterized in that the heating device (28) has film heating elements, preferably thick-film or thin-film heating elements.
  9. Domestic electrical appliance according to any of claims 1 to 7, characterized in that the heating device (28) has tubular heaters or wire-heated heaters.
  10. Domestic electrical appliance according to any of the preceding claims, characterized in that the heating device (28) has at least two individually controllable heating circuits, wherein preferably switches and/or relays are provided for controlling the heating circuits to vary the heating power by different controlling and/or combination of the heating circuits.
  11. Domestic electrical appliance according to any of claims 1 to 9, characterized in that the heating device (28) has at least two individually controllable heating circuits, wherein preferably power electronics are provided for controlling the heating circuits to vary the heating power of the heating circuits continuously.
  12. Domestic electrical appliance according to any of the preceding claims, characterized in that a drive motor (15) for the conveyor (18) is a speed-regulated motor, in particular a synchronous motor, preferably with a lower nominal operating speed for conveying of water and with a higher nominal operating speed for conveying of air.
  13. Domestic electrical appliance according to any of the preceding claims, characterized in that an access (21) to the conveyor (18) is provided from an intake position (31, 34) centrally along the rotational axis (16) of the conveyor (18) and an output (23) from the conveyor (18) to a discharge position is provided radially on the exterior of the conveyor (18).
  14. Domestic electrical appliance according to any of the preceding claims, characterized in that a valve (26) is provided on the pump (12) and/or on a housing (13) with the conveyor (18), respectively, in order to remove water from the pump (12) and from the conveying path thereof for fluid through the pump (12) for subsequent conveying of air.
EP09778692.5A 2008-09-25 2009-09-24 Fluid pump Active EP2348944B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09778692.5T PL2348944T5 (en) 2008-09-25 2009-09-24 Fluid pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008050895A DE102008050895A1 (en) 2008-09-25 2008-09-25 Pump for fluids
PCT/EP2009/006894 WO2010034488A1 (en) 2008-09-25 2009-09-24 Pump for fluids

Publications (3)

Publication Number Publication Date
EP2348944A1 EP2348944A1 (en) 2011-08-03
EP2348944B1 true EP2348944B1 (en) 2017-12-20
EP2348944B2 EP2348944B2 (en) 2022-10-26

Family

ID=41507949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09778692.5A Active EP2348944B2 (en) 2008-09-25 2009-09-24 Fluid pump

Country Status (5)

Country Link
EP (1) EP2348944B2 (en)
DE (1) DE102008050895A1 (en)
ES (1) ES2657433T5 (en)
PL (1) PL2348944T5 (en)
WO (1) WO2010034488A1 (en)

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Publication number Priority date Publication date Assignee Title
EP3859071A1 (en) 2020-01-31 2021-08-04 E.G.O. Elektro-Gerätebau GmbH Water-conducting domestic appliance and method for operating a water-conducting domestic appliance

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DE102008050895A1 (en) 2008-09-25 2010-04-01 E.G.O. Elektro-Gerätebau GmbH Pump for fluids
DE102010043727A1 (en) 2010-11-10 2012-05-10 E.G.O. Elektro-Gerätebau GmbH pump
DE102011078017B3 (en) 2011-06-22 2012-06-21 E.G.O. Elektro-Gerätebau GmbH pump
DE102012202065B3 (en) * 2012-02-10 2013-05-29 E.G.O. Elektro-Gerätebau GmbH Pump and method for heating a pump
US9371841B2 (en) 2012-03-05 2016-06-21 Electrolux Home Products, Inc. Safety arrangement for an integrated heater, pump, and motor for an appliance
DE102012108449A1 (en) 2012-09-11 2014-03-13 Ebm-Papst Mulfingen Gmbh & Co. Kg Wall ring of a fan with heating element
DE102012218145B4 (en) * 2012-10-04 2018-12-27 E.G.O. Elektro-Gerätebau GmbH impeller
DE102012025758B3 (en) 2012-10-04 2021-12-02 E.G.O. Elektro-Gerätebau GmbH Impeller pump
DE102013201903A1 (en) 2013-02-06 2014-08-07 E.G.O. Elektro-Gerätebau GmbH Heat pump device, use of a pump with heatable pumping chamber in a heat pump device and method of operating a heat pump device
DE102014215853A1 (en) * 2014-08-11 2016-02-11 BSH Hausgeräte GmbH Pump with a heating device, which has an electric foil heating
DE102019211099A1 (en) 2019-07-25 2021-01-28 E.G.O. Elektro-Gerätebau GmbH Water-bearing household appliance and method for operating a water-bearing household appliance
DE102019212952B4 (en) * 2019-08-28 2023-05-11 Blanco Gmbh + Co Kg Cleaning device and method for operating a cleaning device

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EP3859071A1 (en) 2020-01-31 2021-08-04 E.G.O. Elektro-Gerätebau GmbH Water-conducting domestic appliance and method for operating a water-conducting domestic appliance

Also Published As

Publication number Publication date
PL2348944T5 (en) 2023-02-20
ES2657433T3 (en) 2018-03-05
WO2010034488A1 (en) 2010-04-01
PL2348944T3 (en) 2018-07-31
EP2348944B2 (en) 2022-10-26
ES2657433T5 (en) 2023-02-23
DE102008050895A1 (en) 2010-04-01
EP2348944A1 (en) 2011-08-03

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