EP3104016B1 - Pump assembly - Google Patents

Pump assembly Download PDF

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Publication number
EP3104016B1
EP3104016B1 EP16020220.6A EP16020220A EP3104016B1 EP 3104016 B1 EP3104016 B1 EP 3104016B1 EP 16020220 A EP16020220 A EP 16020220A EP 3104016 B1 EP3104016 B1 EP 3104016B1
Authority
EP
European Patent Office
Prior art keywords
liquid
siphon
wall
container
pump
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.)
Active
Application number
EP16020220.6A
Other languages
German (de)
French (fr)
Other versions
EP3104016A1 (en
Inventor
Ralf Ellersiek
Vikram Bangalore Nagendra
Markus Wensel
Sebastian Spier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miele und Cie KG
Hanning Elektro Werke GmbH and Co KG
Original Assignee
Miele und Cie KG
Hanning Elektro Werke GmbH and Co KG
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Publication of EP3104016A1 publication Critical patent/EP3104016A1/en
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Publication of EP3104016B1 publication Critical patent/EP3104016B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4293—Details of fluid inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet

Definitions

  • the invention relates to a pump arrangement comprising an electric motor-driven pump for pumping a liquid optionally containing solids with a pump wheel held on a rotating shaft and a pump housing that encompasses the pump wheel at least in sections, on which an inlet opening for the liquid optionally mixed with the solids and a discharge nozzle for the liquid optionally mixed with the solids are provided, a liquid container designed to receive the liquid optionally containing the solids with a container bottom, with a side wall and with an opening opposite the container bottom, with a connection section for an external supply line and one for receiving on the liquid container of the pump wheel and the pump housing are provided, and a siphon-like line section serving as an odor stop for the F, optionally mixed with the solids liquid.
  • Generic pump arrangements are used today in large numbers, for example in household appliances carrying water such as washing machines or dishwashers, in cooking appliances and in the field of sanitary engineering. It is customary here to provide a sump, which is deep in relation to an installation position, on the liquid container, in which the liquid, optionally mixed with solids, preferably collects.
  • the pump wheel of the liquid pump and the pump housing encompassing the pump wheel are arranged in this sump.
  • the special arrangement ensures that the liquid optionally mixed with the solids can be conveyed as completely as possible from the liquid container.
  • a siphon-like line section is usually provided as an odor stop in the area of a feed line for the liquid that is led to the liquid container.
  • the liquid optionally mixed with solids first flows through the feed line and the siphon-like line section and then passes through the connection section into the liquid container, which is arranged in front of the feed line and the siphon-like line section in relation to a flow direction of the liquid optionally mixed with solids.
  • the siphon-like line section is, for example, U-shaped and arranged in such a way that a residual amount of liquid remains in the U-shaped line section even after the liquid container has been completely emptied. This liquid reservoir closes the supply line in a gas-tight manner, with the result that an odor trap is formed and an unacceptable, undesirable odor formation is prevented.
  • a pump arrangement is known in which a siphon-like line section, viewed in a direction of flow of the liquid, is provided in front of the connection section of the liquid container, so that, during operation, first the connection section and then the siphon-like line section is flowed through,
  • the object of the present invention is to provide an alternative structural design for the pump arrangement which meets the requirement for cost reduction and has a particularly compact design.
  • this object is achieved in a generic pump arrangement according to the preamble of claim 1 by the features specified in the characterizing part of claim 1.
  • the liquid optionally mixed with solids flows through the feed line in the direction of the liquid container.
  • it can be actively promoted through the supply line or, for example, due to the installation situation, it can flow passively through the supply line over a gradient implemented in the supply line or a height difference.
  • the supply line is connected to the connection section of the liquid container.
  • the connection section lies in front of the feed line, viewed in the direction of flow of the liquid.
  • the liquid reaches the interior of the liquid container via the connection section.
  • the liquid optionally mixed with solids is then pumped out of the liquid container via the electric motor-driven pump. For example, it is fed back into an active circuit or conveyed away.
  • the liquid optionally mixed with solids thus initially flows through the feed line (not shown) and then reaches the connection section arranged upstream of the feed line in relation to the direction of flow.
  • the connection section viewed in the direction of flow, lies the siphon-like line section into which the liquid reaches after flowing through the connection section.
  • a floating body is implemented in the pump arrangement, which is arranged in the liquid container in a height-adjustable or pivotable manner.
  • a magnet is embedded in the floating body and interacts with an active body provided in an active body recess.
  • the active body recess is implemented as part of the closure cover.
  • the position of the floating body is defined as a function of the filling level of the liquid container, a control signal for the pump being generated as soon as the floating body assumes a defined position relative to the active body.
  • a siphon-like line section within the meaning of the invention is any curved or labyrinth-like line section which, due to its geometry, defines a liquid reservoir in a suitable installation position, which prevents the passage of gases when a sufficient amount of liquid is received and thus serves as an odor trap.
  • the tube siphon which is often U-shaped, and the bottle or pocket siphon are frequently used.
  • the liquid can optionally have solids or solids can be added.
  • the siphon-like line section designed as an odor trap is spatially integrated in the liquid container.
  • this advantageously results in a particularly compact design of the pump arrangement according to the invention, which simplifies the integration of the pump arrangement into existing and newly developed devices (washing machines, dishwashers, cooking appliances, ).
  • the liquid container with the spatially integrated siphon-like line section can be geometrically adapted to the installation space that the device provided for receiving the pump arrangement makes available. The space required for the supply line can be significantly reduced by dispensing with the provision of the external siphon.
  • walls arranged in a labyrinthine manner are provided as part of the siphon-like line section, which walls extend between the side wall of the liquid container.
  • the side wall of the liquid container and at least some of the labyrinthine-like walls of the siphon-like line section are designed in one piece.
  • the special arrangement of the walls advantageously favors the compact design.
  • the one-piece implementation reduces the number of components and the assembly effort. It also prevents incorrect assembly and counteracts failure of the odor stop function, for example due to the loosening of a connection or a leak in the seal.
  • a first rising wall extending from the container base in the direction of the opening and a drop wall extending from the closure cover in the direction of the container base are provided as part of the siphon-like line section.
  • the rising wall is made in one piece with the container bottom.
  • a seal is provided between the first rising wall and the container bottom.
  • the case wall and the closure cover can be realized in one piece or a seal is provided between the case wall and the closure cover in order to realize the gas-tight connection of the case wall to the closure cover.
  • a gas-tight connection of the drop wall to the side wall is realized, for example, by a seal.
  • a very compact design is advantageously obtained in front of the siphon-like line section.
  • the one-piece implementation results in a construction suitable for production when the first rising wall from the container base or the drop wall from the closure cover protrudes vertically or without an undercut in the direction of an opening of an injection molding tool and the liquid container or closure cover is implemented as an injection-molded part, preferably as a plastic injection-molded part become.
  • the first rising wall and the falling wall are annular and / or are assigned to one another concentrically.
  • the assignment can be provided in such a way that the first rising wall, with a free end facing the closure lid, encompasses a free end of the drop wall facing the container bottom on the shell side. It defines or limits here the first rising wall is the liquid reservoir formed by the siphon-like line section, into which the falling wall protrudes with the free ends.
  • a second rising wall can optionally be provided.
  • This second rising wall can also be designed in an annular manner or be provided concentrically to the first rising wall and / or the falling wall.
  • the second rising wall can directly adjoin the connection section of the liquid container.
  • the at least one rising wall and the falling wall define the siphon-like line section through their labyrinth-like association.
  • Their special geometry and arrangement make it possible to design the line section without undercuts and curved line passages in such a way that inexpensive mass production and a one-piece realization of the liquid container on the one hand and the closure lid on the other hand are favored, with part of the walls being molded onto the liquid container and the closure lid is.
  • the drop wall and the rising walls can be designed in a ring shape or have a different diameter or cross section exhibit.
  • the walls can be cascaded into one another in such a way that a next larger wall always encompasses a smaller wall.
  • the drop wall can in particular be provided between the first rising wall and the second rising wall.
  • the siphon-like line section can be formed between the container base on the one hand and an intermediate base provided at a distance from the container base.
  • a circumferential web is preferably provided on the intermediate floor, with a likewise circumferential seal being provided between the web of the intermediate floor and the side wall.
  • the circumferential seal serves in particular to design the siphon-like line section in a gas-tight manner as an odor trap.
  • An inventive pump arrangement comprises, as essential components, a liquid container 1, an electric motor-driven pump 2 provided in sections in the liquid container 1, as well as a closure cover 3 for the liquid container 1.
  • the liquid container 1 provides a container base 4 and a circumferential side wall 5 which is formed on the container base 4 and is made in one piece with this.
  • the closure cover 3 is provided for closing an opening of the liquid container 1.
  • a circumferential seal 6 is provided to seal the closure cover 3 against the side wall 5 of the liquid container 1 .
  • the closure cover 3 and the liquid container 1 are positively fixed to one another via a latching connection 7.
  • a sump 8 is formed at the lowest point of the liquid container 1 in the area of the container bottom 4 in the orientation (installation position) of the pump arrangement shown, in which liquid optionally mixed with solids collects.
  • the sump 8 is assigned a pump housing 9 and an impeller of the pump 2 (not shown) provided in the pump housing 9. Furthermore, a connection section 10 is provided on the liquid container 1, to which an external feed line (not shown) for the liquid can be connected. The connection section 10 is provided above the sump 8.
  • the line section 11 has three annular walls 12, 13, 14 arranged concentrically to one another.
  • An outer wall 12 is formed in one piece with the container base 4 of the liquid container 1 and protrudes from the container base 4 as a first rising wall 12 in the direction of the closure cover 3.
  • a free end face 15 of the first rising wall 12 faces the closure cover 3.
  • the case wall 13 is made in one piece with the closure cover 3. It protrudes from the closure cover 3 in the direction of the container bottom 4.
  • a free end face 16 of the case wall 13 faces the container bottom 4. With a free end having the free end face 16, the drop wall 13 protrudes into the first rising wall 12 of the siphon-like line section 11.
  • the drop wall 13 includes a second rising wall 14 in the area of a free end having the free end face 16, which, like the first rising wall 12, protrudes from the container bottom 4 in the direction of the closure lid 3 and is provided concentrically to the first rising wall 12.
  • a free end face 17 of the second rising wall 14 faces the closure cover 3.
  • the free end face 17 of the second rising wall 14 is - based on the installation position - arranged at the same level as the free end face 15 of the first rising wall 12.
  • the second rising wall 14 directly adjoins the connection section 10 of the liquid container 1. Like the first rising wall 12, the second rising wall 14 is also made in one piece with the container bottom 4 of the liquid container 1.
  • the pump 2 has an electric motor (not shown) and a motor housing 18 that accommodates the electric motor.
  • the electric motor As part of the electric motor, one is in particular in the Motor housing 18 arranged control is provided, as well as a connection contact 19 leading out of the motor housing.
  • the electric motor provides a stator and a rotor which is rotatably held in relation to the stator on a shaft carrying the pump wheel.
  • An inlet opening and an outlet connection 20 are provided on the pump housing 9 adjacent to the container bottom 4.
  • a floating body 21 is implemented as part of the pump arrangement, which is arranged in the liquid container 1 in a height-adjustable or pivotable manner.
  • a magnet 44 is embedded in the floating body 21.
  • the magnet 44 interacts with an active body (not shown), for example a Hall sensor or reed switch, which is provided in an active body recess 22 that is implemented as part of the closure cover 3.
  • an active body for example a Hall sensor or reed switch
  • two connection pieces 23, 24 are formed on the closure cover 3, which are used to connect the pump arrangement to additional lines, for example condensate lines.
  • the liquid optionally mixed with solids is fed to the liquid container 1 via the feed line (not shown) and the connection section 10.
  • the liquid flows in a flow direction 25 and, after passing through the connection section 10, reaches the effective area of the siphon-like line section 11, which is arranged in front of the feed line and the connection section 10 and is designed as an odor trap, relative to the flow direction 25, and optionally flows through it
  • Liquid mixed with solids thus first enters the feed line (not shown) and then reaches the connection section 10, which is arranged upstream of the feed line in relation to the flow direction 25 of the connection section 10 arrives.
  • the walls 12, 13, 14 of the siphon-like line section 11 interact here like a labyrinth.
  • the liquid flows through an annular opening 29 defined by the free end face 15 and the jacket of the drop wall 13 into the Storage area 28 of the liquid container 1.
  • the liquid initially collects at the lowest point, i.e. in the area of the sump 8 of the liquid container 1.
  • the position of the float 21 is defined depending on the fill level of the liquid container 1. As soon as the float 21 has a defined position relative to the in The active body provided for the active body recess 22 assumes a control signal for the pump 2 is generated.
  • the pump 2 starts up and the liquid, which enters the same via the inlet opening of the pump housing 9, is pumped out via the drain connection 20 and a drain line (not shown).
  • a pump arrangement according to the invention for cooking appliances is shown as an example.
  • the liquid mixed with solids for example roasting residues
  • a pump arrangement according to the invention can alternatively be provided in domestic appliances which carry water, for example in dishwashers or washing machines, in commercial appliances which carry water or in sanitary facilities.
  • FIG. 1 and 2 While according to the first embodiment of the invention according to the Fig. 1 and 2 the siphon-like line section 11 of the pump arrangement is formed by the three concentrically associated, labyrinthine cooperating walls 12, 13, 14, provides a second embodiment of a pump arrangement according to the invention according to FIG Fig. 3 two disk-like walls 32, 33 in front.
  • a first wall 32 is implemented as a drop wall 32 which is formed in one piece with the closure cover 3 and extends parallel to a side wall section 5 ′ having the connection section 10 of the pump arrangement.
  • a free edge 34 of the case wall 32 is provided facing the container bottom 4.
  • a second wall 33 is implemented as a rising wall 33. The rising wall 33 protrudes from the container bottom 4 in the direction of the closure cover 3 of the pump arrangement.
  • a free edge 36 of the rising wall 33 is provided above the free edge 34 of the drop wall 32 in relation to the installation position of the pump arrangement shown.
  • the rising wall 33 is oriented parallel to the falling wall 32. While the rising wall 33 is preferably connected in one piece to the side wall 5, seals (not shown) are provided between the drop wall 32 and the side wall 5 to realize a gas-tight connection of the drop wall 32 with the side wall 5 of the liquid container 1.
  • the horizontal level of the free edge 36 of the rising wall 33 relative to the sump 8 of the liquid container 1 ensures that the liquid reservoir 35 is also filled with the liquid optionally mixed with solids when the liquid is completely or almost completely conveyed away from the storage area 28 is.
  • the siphon-like line section 11 designed as an odor stop, is formed in the region of the container bottom 4.
  • an intermediate base 40 extending essentially parallel to the container base 4 is provided.
  • a circumferential web 41 is formed on the edge of the intermediate floor 40.
  • the web 41 serves to accommodate a circumferential seal 42, which is provided between the side wall 5 and the web 41 of the intermediate floor 40 in the assembly position shown.
  • the siphon-like, angled line section 11 is consequently formed gas-tight between the container bottom 4, the side wall 5 and the intermediate bottom 40.
  • a passage opening 43 for the liquid optionally mixed with solids is provided in the intermediate base 40.
  • the liquid reaches the sump 8 of the liquid container 1 formed above the intermediate floor 40. If the pump 2 of the pump arrangement is operated and the liquid optionally mixed with solids is conveyed away from the storage area 28 of the liquid container 1, residual liquid always remains in the deep lying part of the siphon-like line section 11, which serves as a liquid reservoir.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft eine Pumpenanordnung umfassend eine elektromotorisch antreibbare Pumpe zum Fördern einer optional Feststoffe aufweisenden Flüssigkeit mit einem an einer rotierenden Welle gehaltenen Pumpenrad und einem das Pumpenrad jedenfalls abschnittsweise umgreifenden Pumpengehäuse, an dem eine Zulauföffnung für die optional mit den Feststoffen versetzte Flüssigkeit und ein Ablaufstutzen für die optional mit den Feststoffen versetzte Flüssigkeit vorgesehen sind, einen zur Aufnahme der optional die Feststoffe aufweisenden Flüssigkeit ausgebildeten Flüssigkeitsbehälter mit einem Behälterboden, mit einer Seitenwand und mit einer dem Behälterboden gegenüberliegenden Öffnung, wobei an dem Flüssigkeitsbehälter ein Anschlussabschnitt für eine externe Zuleitung und ein zur Aufnahme des Pumpenrads und des Pumpengehäuses ausgebildeter Sumpf vorgesehen sind, und einen als Geruchsstopp dienenden, siphonartig ausgebildeten Leitungsabschnitt für die optional mit den Feststoffen versetzte Flüssigkeit. Gattungsgemäße Pumpenanordnungen werden heute in großer Stückzahl beispielsweise in Wasser führenden Haushaltsgeräten wie Waschmaschinen oder Geschirrspülern, in Gargeräten und im Bereich der Sanitärtechnik eingesetzt. Üblich ist hierbei, an dem Flüssigkeitsbehälter einen bezogen auf eine Einbaulage tief liegenden Sumpf vorzusehen, in dem sich die optional mit Feststoffen versetzte Flüssigkeit bevorzugt sammelt. Das Pumpenrad der Flüssigkeitspumpe sowie das das Pumpenrad umgreifende Pumpengehäuse sind in diesem Sumpf angeordnet. Die spezielle Anordnung stellt dabei sicher, dass die optional mit den Feststoffen versetzte Flüssigkeit möglichst vollständig aus dem Flüssigkeitsbehälter abgefördert werden kann. Um auch im Falle eines nahezu vollständig entleerten Flüssigkeitsbehälters einer nicht erwünschten Geruchsbildung vorzubeugen, wird heute üblicherweise im Bereich einer zu dem Flüssigkeitsbehälter geführten Zuleitung für die Flüssigkeit ein siphonartig ausgebildeter Leitungsabschnitt als Geruchsstopp vorgesehen. Die optional mit Feststoffen versetzte Flüssigkeit strömt insofern zunächst durch die Zuleitung und den siphonartigen Leitungsabschnitt und gelangt dann durch den Anschlussabschnitt in den Flüssigkeitsbehälter, welcher bezogen auf eine Fließrichtung der optional mit Feststoffen versetzten Flüssigkeit vor der Zuleitung und dem siphonartig ausgebildeten Leitungsabschnitt angeordnet ist. Der siphonartige Leitungsabschnitt ist beispielsweise U-förmig ausgebildet und so angeordnet, dass auch nach dem vollständigen Entleeren des Flüssigkeitsbehälters eine Restmenge an Flüssigkeit in dem U-förmigen Leitungsabschnitt verbleibt. Dieses Flüssigkeitsreservoir verschließt die Zuleitung gasdicht mit der Folge, dass ein Geruchsstopp gebildet und einer nicht akzeptablen, unerwünschten Geruchsbildung vorgebeugt ist.The invention relates to a pump arrangement comprising an electric motor-driven pump for pumping a liquid optionally containing solids with a pump wheel held on a rotating shaft and a pump housing that encompasses the pump wheel at least in sections, on which an inlet opening for the liquid optionally mixed with the solids and a discharge nozzle for the liquid optionally mixed with the solids are provided, a liquid container designed to receive the liquid optionally containing the solids with a container bottom, with a side wall and with an opening opposite the container bottom, with a connection section for an external supply line and one for receiving on the liquid container of the pump wheel and the pump housing are provided, and a siphon-like line section serving as an odor stop for the F, optionally mixed with the solids liquid. Generic pump arrangements are used today in large numbers, for example in household appliances carrying water such as washing machines or dishwashers, in cooking appliances and in the field of sanitary engineering. It is customary here to provide a sump, which is deep in relation to an installation position, on the liquid container, in which the liquid, optionally mixed with solids, preferably collects. The pump wheel of the liquid pump and the pump housing encompassing the pump wheel are arranged in this sump. The special arrangement ensures that the liquid optionally mixed with the solids can be conveyed as completely as possible from the liquid container. In order to prevent undesired odor formation even in the case of an almost completely emptied liquid container, a siphon-like line section is usually provided as an odor stop in the area of a feed line for the liquid that is led to the liquid container. The liquid optionally mixed with solids first flows through the feed line and the siphon-like line section and then passes through the connection section into the liquid container, which is arranged in front of the feed line and the siphon-like line section in relation to a flow direction of the liquid optionally mixed with solids. The siphon-like line section is, for example, U-shaped and arranged in such a way that a residual amount of liquid remains in the U-shaped line section even after the liquid container has been completely emptied. This liquid reservoir closes the supply line in a gas-tight manner, with the result that an odor trap is formed and an unacceptable, undesirable odor formation is prevented.

Grundsätzlich hat sich die gattungsgemäße Pumpenanordnung in der Praxis über viele Jahre bewährt. Gleichwohl besteht stets der Wunsch, die Kosten der Pumpenanordnung zu senken und den Bauraumbedarf zu reduzieren.In principle, the generic pump arrangement has proven itself in practice over many years. At the same time, there is always the desire to lower the costs of the pump arrangement and to reduce the space required.

Aus der Druckschrift US 5 868 011 A ist eine Pumpenanordnung bekannt, bei welcher ein siphonartiger Leitungsabschnitt in eine Fließrichtung der Flüssigkeit betrachtet vor dem Anschlussabschnitt des Flüssigkeitsbehälters vorgesehen ist, sodass im Betrieb zunächst der Anschlussabschnitt und dann der siphonartige Leitungsabschnitt durchströmt wird ,From the pamphlet U.S. 5,868,011 A a pump arrangement is known in which a siphon-like line section, viewed in a direction of flow of the liquid, is provided in front of the connection section of the liquid container, so that, during operation, first the connection section and then the siphon-like line section is flowed through,

Aufgabe der vorliegenden Erfindung ist es insofern, eine alternative konstruktive Ausführung für die Pumpenanordnung anzugeben, welche der Forderung nach Kostenreduzierung genügt und eine besonders kompakte Bauform aufweist.The object of the present invention is to provide an alternative structural design for the pump arrangement which meets the requirement for cost reduction and has a particularly compact design.

Erfindungsgemäß wird diese Aufgabe bei einer gattungsgemäßen Pumpenanordnung gemäß dem Oberbegriff des Patentanspruchs 1 gelöst durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale..According to the invention, this object is achieved in a generic pump arrangement according to the preamble of claim 1 by the features specified in the characterizing part of claim 1.

Bei der Pumpenanordnung wird erreicht, dass durch die Positionierung des siphonartigen Leitungsabschnitts vor dem Anschlussabschnitt der Montageaufwand zur Installation der Pumpenanordnung reduziert wird. Die externe Zuleitung muss nunmehr allein mit dem Anschlussabschnitt des Flüssigkeitsbehälters verbunden werden. Eine Integration des siphonartigen Leitungsabschnitts in die Zuleitung entfällt. Zudem reduziert sich der Aufwand bei der Kontrolle der Dichtigkeit, da nur noch eine und nicht wie heute üblich wenigstens zwei Verbindungsstellen zu prüfen sind.In the case of the pump arrangement, it is achieved that by positioning the siphon-like line section in front of the connection section, the assembly effort for installing the pump arrangement is reduced. The external supply line now has to be connected solely to the connection section of the liquid container. There is no need to integrate the siphon-like line section into the supply line. In addition, the effort involved in checking the tightness is reduced, since only one and not, as is common today, at least two connection points need to be checked.

Im Rahmen der Erfindung gilt hierbei, dass die optional mit Feststoffen versetzte Flüssigkeit durch die Zuleitung in Richtung des Flüssigkeitsbehälters fließt. Sie kann hierbei aktiv durch die Zuleitung gefördert oder beispielsweise aufgrund der Einbausituation über ein in der Zuleitung realisiertes Gefälle beziehungsweise eine Höhendifferenz passiv durch die Zuleitung strömen. Die Zuleitung ist mit dem Anschlussabschnitt des Flüssigkeitsbehälters verbunden. Der Anschlussabschnitt liegt insofern in die Flussrichtung der Flüssigkeit betrachtet vor der Zuleitung. Über den Anschlussabschnitt gelangt die Flüssigkeit ins Innere des Flüssigkeitsbehälters. Im Sprachgebrauch der Erfindung gilt insofern, dass bezogen auf die Fließrichtung der Flüssigkeit der Flüssigkeitsbehälter und der siphonartige Leitungsabschnitt vor dem Anschlussabschnitt liegen. Aus dem Flüssigkeitsbehälter wird die optional mit Feststoffen versetzte Flüssigkeit dann über die elektromotorisch betriebene Pumpe abgepumpt. Beispielsweise wird sie einem Wirkkreislauf erneut zugeführt oder abgefördert.In the context of the invention, it applies here that the liquid optionally mixed with solids flows through the feed line in the direction of the liquid container. In this case, it can be actively promoted through the supply line or, for example, due to the installation situation, it can flow passively through the supply line over a gradient implemented in the supply line or a height difference. The supply line is connected to the connection section of the liquid container. In this respect, the connection section lies in front of the feed line, viewed in the direction of flow of the liquid. The liquid reaches the interior of the liquid container via the connection section. In the linguistic usage of the invention, the following applies to the extent that, based on the direction of flow of the liquid, the liquid container and the siphon-like line section lie in front of the connection section. The liquid optionally mixed with solids is then pumped out of the liquid container via the electric motor-driven pump. For example, it is fed back into an active circuit or conveyed away.

Bezogen auf die Fließrichtung durchströmt die optional mit Feststoffen versetzte Flüssigkeit also zunächst die nicht dargestellte Zuleitung und gelangt dann in den bezogen auf die Fließrichtung vor der Zuleitung angeordneten Anschlussabschnitt. Wiederum vor dem Anschlussabschnitt liegt in die Fließrichtung betrachtet der siphonartig gebildete Leitungsabschnitt, in den die Flüssigkeit nach dem Durchströmen des Anschlussabschnitts gelangt.In relation to the direction of flow, the liquid optionally mixed with solids thus initially flows through the feed line (not shown) and then reaches the connection section arranged upstream of the feed line in relation to the direction of flow. Again in front of the connection section, viewed in the direction of flow, lies the siphon-like line section into which the liquid reaches after flowing through the connection section.

Erfindungsgemäß ist vorgesehen, dass in der Pumpenanordnung ein Schwimmkörper realisiert ist, welcher höhenverstellbar beziehungsweise schwenkbar in dem Flüssigkeitsbehälter angeordnet ist. In dem Schwimmkörper ist ein Magnet eingelassen, welcher mit einem in einer Wirkkörperausnehmung vorgesehenem Wirkkörper interagiert. Die Wirkkörperausnehmung ist als ein Teil des Verschlussdeckels realisiert. Die Position des Schwimmkörpers ist abhängig vom Füllstand des Flüssigkeitsbehälters definiert, wobei ein Steuersignal für die Pumpe erzeugt wird, sobald der Schwimmkörper eine definierte Relativposition zu dem Wirkkörper einnimmt.According to the invention it is provided that a floating body is implemented in the pump arrangement, which is arranged in the liquid container in a height-adjustable or pivotable manner. A magnet is embedded in the floating body and interacts with an active body provided in an active body recess. The active body recess is implemented as part of the closure cover. The position of the floating body is defined as a function of the filling level of the liquid container, a control signal for the pump being generated as soon as the floating body assumes a defined position relative to the active body.

Als siphonartig ausgebildeter Leitungsabschnitt im Sinne der Erfindung gilt jeder gebogen geformte beziehungsweise labyrinthartige Leitungsabschnitt, der aufgrund seiner Geometrie bei einer geeigneten Einbaulage ein Flüssigkeitsreservoir definiert, welches bei der Aufnahme einer ausreichenden Menge von Flüssigkeit den Durchtritt von Gasen verhindert und so als Geruchsverschluss dient. Häufig verwendet sind hierbei insbesondere der Röhrensiphon, welcher häufig U-förmig gebildet ist, und der Flaschen- beziehungsweise Taschensiphon.A siphon-like line section within the meaning of the invention is any curved or labyrinth-like line section which, due to its geometry, defines a liquid reservoir in a suitable installation position, which prevents the passage of gases when a sufficient amount of liquid is received and thus serves as an odor trap. In particular, the tube siphon, which is often U-shaped, and the bottle or pocket siphon are frequently used.

Gemäß einem Aspekt der Erfindung kann die Flüssigkeit optional Feststoffe aufweisen oder mit Feststoffen versetzt sein.According to one aspect of the invention, the liquid can optionally have solids or solids can be added.

Erfindungsgemäß ist der als Geruchsverschluss ausgebildete siphonartige Leitungsabschnitt räumlich in dem Flüssigkeitsbehälter integriert. Vorteilhaft ergibt sich hierbei zusätzlich zu der verbesserten Montagefähigkeit eine besonders kompakte Bauform der erfindungsgemäßen Pumpenanordnung, die die Integration der Pumpenanordnung in bestehende und neu entwickelte Geräte (Waschmaschinen, Geschirrspüler, Gargerät, ...) vereinfacht. Insbesondere kann der Flüssigkeitsbehälter mit dem räumlich integrierten siphonartigen Leitungsabschnitt geometrisch an den Bauraum angepasst werden, den das zur Aufnahme der Pumpenanordnung vorgesehene Gerät zur Verfügung stellt. Der Bauraumbedarf für die Zuleitung kann durch den Verzicht auf das Vorsehen des externen Siphons signifikant reduziert werden.According to the invention, the siphon-like line section designed as an odor trap is spatially integrated in the liquid container. In addition to the improved assembly capability, this advantageously results in a particularly compact design of the pump arrangement according to the invention, which simplifies the integration of the pump arrangement into existing and newly developed devices (washing machines, dishwashers, cooking appliances, ...). In particular, the liquid container with the spatially integrated siphon-like line section can be geometrically adapted to the installation space that the device provided for receiving the pump arrangement makes available. The space required for the supply line can be significantly reduced by dispensing with the provision of the external siphon.

Nach einer Weiterbildung der Erfindung ist in einer Zusammenbaustellung der Pumpenanordnung ein an die Seitenwand des Flüssigkeitsbehälters angelegter Verschlussdeckel zum Verschließen der Öffnung des Flüssigkeitsbehälters vorgesehen. Bevorzugt ist zwischen dem Verschlussdeckel und der Seitenwand eine umlaufende Dichtung angeordnet. Vorteilhaft dienen der Verschlussdeckel und insbesondere auch die umlaufende Dichtung als weiterer Geruchsverschluss. Es wird insofern ein dichter Flüssigkeitsbehälter für die optional mit Feststoffen versetzte Flüssigkeit bereitgestellt.According to a further development of the invention, in an assembled position of the pump arrangement, one is placed against the side wall of the liquid container Closing cover provided for closing the opening of the liquid container. A circumferential seal is preferably arranged between the closure cover and the side wall. The sealing cover and in particular also the circumferential seal advantageously serve as a further odor trap. To this extent, a tight liquid container is provided for the liquid optionally mixed with solids.

Nach einer Weiterbildung der Erfindung sind als Teil des siphonartigen Leitungsabschnitts labyrinthartig angeordnete Wandungen vorgesehen, welche sich zwischen der Seitenwand des Flüssigkeitsbehälters erstrecken. Insbesondere sind die Seitenwand des Flüssigkeitsbehälters und wenigstens einzelne der labyrinthartig angeordneten Wandungen des siphonartigen Leitungsabschnitts einstückig ausgebildet. Vorteilhaft begünstigt die spezielle Anordnung der Wandungen die kompakte Bauform. Durch die einstückige Realisierung reduziert sich die Anzahl der Bauteile und der Montageaufwand sinkt. Es ist überdies einer Fehlmontage vorgebeugt und einem Ausfall der Geruchsstopp-Funktion, etwa durch das Lösen einer Verbindung oder eine Undichtigkeit der Dichtung, entgegengewirkt.According to a further development of the invention, walls arranged in a labyrinthine manner are provided as part of the siphon-like line section, which walls extend between the side wall of the liquid container. In particular, the side wall of the liquid container and at least some of the labyrinthine-like walls of the siphon-like line section are designed in one piece. The special arrangement of the walls advantageously favors the compact design. The one-piece implementation reduces the number of components and the assembly effort. It also prevents incorrect assembly and counteracts failure of the odor stop function, for example due to the loosening of a connection or a leak in the seal.

Nach einer Weiterbildung der Erfindung sind als Teil des siphonartigen Leitungsabschnitts eine von dem Behälterboden in Richtung der Öffnung erstreckte erste Steigwandung und eine von dem Verschlussdeckel in Richtung des Behälterbodens erstreckte Fallwandung vorgesehen. Beispielsweise ist die Steigwandung einstückig mit dem Behälterboden realisiert. Beispielsweise ist zwischen der ersten Steigwandung und dem Behälterboden eine Dichtung vorgesehen. Ebenso können die Fallwandung und der Verschlussdeckel einstückig realisiert sein oder es ist eine Dichtung zwischen der Fallwandung und dem Verschlussdeckel vorgesehen zur Realisierung der gasdichten Anbindung der Fallwandung an den Verschlussdeckel. Eine gasdichte Anbindung der Fallwandung an der Seitenwand wird beispielsweise durch eine Dichtung realisiert. Vorteilhaft ergibt sich eine sehr kompakte Bauform vor dem siphonartigen Leitungsabschnitt. Darüber hinaus ergibt sich insbesondere bei der einstückigen Realisierung eine fertigungsgerechte Konstruktion, wenn die erste Steigwandung von dem Behälterboden oder die Fallwandung von dem Verschlussdeckel in Richtung einer Öffnung eines Spritzgießwerkzeugs senkrecht beziehungsweise ohne Hinterschnitt abragt und der Flüssigkeitsbehälter oder der Verschlussdeckel als Spritzgießteil, bevorzugt als Kunststoffspritzgießteil realisiert werden.According to a further development of the invention, a first rising wall extending from the container base in the direction of the opening and a drop wall extending from the closure cover in the direction of the container base are provided as part of the siphon-like line section. For example, the rising wall is made in one piece with the container bottom. For example, a seal is provided between the first rising wall and the container bottom. Likewise, the case wall and the closure cover can be realized in one piece or a seal is provided between the case wall and the closure cover in order to realize the gas-tight connection of the case wall to the closure cover. A gas-tight connection of the drop wall to the side wall is realized, for example, by a seal. A very compact design is advantageously obtained in front of the siphon-like line section. In addition, the one-piece implementation results in a construction suitable for production when the first rising wall from the container base or the drop wall from the closure cover protrudes vertically or without an undercut in the direction of an opening of an injection molding tool and the liquid container or closure cover is implemented as an injection-molded part, preferably as a plastic injection-molded part become.

Nach einer Weiterbildung der Erfindung sind die erste Steigwandung und die Fallwandung ringförmig ausgebildet und/oder einander konzentrisch zugeordnet. Insbesondere kann die Zuordnung so vorgesehen sein, dass die erste Steigwandung mit einem dem Verschlussdeckel zugewandten freien Ende ein dem Behälterboden zugewandtes freies Ende der Fallwandung mantelseitig umgreift. Es definiert beziehungsweise begrenzt hierbei die erste Steigwandung das von dem siphonartigen Leitungsabschnitt gebildete Flüssigkeitsreservoir, in das die Fallwandung mit den freien Enden hineinragt.According to a further development of the invention, the first rising wall and the falling wall are annular and / or are assigned to one another concentrically. In particular, the assignment can be provided in such a way that the first rising wall, with a free end facing the closure lid, encompasses a free end of the drop wall facing the container bottom on the shell side. It defines or limits here the first rising wall is the liquid reservoir formed by the siphon-like line section, into which the falling wall protrudes with the free ends.

Optional kann eine zweite Steigwandung vorgesehen werden. Diese zweite Steigwandung kann ebenfalls ringförmig ausgebildet beziehungsweise konzentrisch zu der ersten Steigwandung und/oder der Fallwandung vorgesehen werden. Insbesondere kann die zweite Steigwandung sich unmittelbar an den Anschlussabschnitt des Flüssigkeitsbehälters anschließen. Die wenigstens eine Steigwandung und die Fallwandung definieren durch ihre labyrinthartige Zuordnung den siphonartigen Leitungsabschnitt. Ihre spezielle Geometrie und Anordnung erlauben es, den Leitungsabschnitt ohne Hinterschnitte und gebogene Leitungspassagen so auszuführen, dass eine kostengünstige Massenfertigung und eine einstückige Realisierung des Flüssigkeitsbehälters einerseits und des Verschlussdeckels andererseits begünstigt werden, wobei an dem Flüssigkeitsbehälter und an dem Verschlussdeckel jeweils ein Teil der Wandungen angeformt ist.A second rising wall can optionally be provided. This second rising wall can also be designed in an annular manner or be provided concentrically to the first rising wall and / or the falling wall. In particular, the second rising wall can directly adjoin the connection section of the liquid container. The at least one rising wall and the falling wall define the siphon-like line section through their labyrinth-like association. Their special geometry and arrangement make it possible to design the line section without undercuts and curved line passages in such a way that inexpensive mass production and a one-piece realization of the liquid container on the one hand and the closure lid on the other hand are favored, with part of the walls being molded onto the liquid container and the closure lid is.

Jeweils können die Fallwandung und die Steigwandungen ringförmig ausgebildet sein beziehungsweise einen unterschiedlichen Durchmesser beziehungsweise Querschnitt aufweisen. Die Wandungen können kaskadenartig so ineinander gestülpt sein, dass stets eine nächstgrößere Wandung eine kleinere Wandung umgreift. Die Fallwandung kann insbesondere zwischen der ersten Steigwandung und der zweiten Steigwandung vorgesehen werden.In each case, the drop wall and the rising walls can be designed in a ring shape or have a different diameter or cross section exhibit. The walls can be cascaded into one another in such a way that a next larger wall always encompasses a smaller wall. The drop wall can in particular be provided between the first rising wall and the second rising wall.

Nach einer alternativen Ausführungsform der Erfindung kann der siphonartige Leitungsabschnitt zwischen dem Behälterboden einerseits und einem beabstandet zu dem Behälterboden vorgesehenen Zwischenboden gebildet sein. An dem Zwischenboden ist bevorzugt ein umlaufender Steg vorgesehen, wobei eine ebenfalls umlaufende Dichtung zwischen dem Steg des Zwischenbodens und der Seitenwandung vorgesehen ist. Die umlaufende Dichtung dient insbesondere dazu, den siphonartigen Leitungsabschnitt gasdicht als Geruchsverschluss auszubilden. Vorteilhaft ergibt sich durch das Vorsehen des siphonartigen Leitungsabschnitts zwischen dem Behälterboden und dem Zwischenboden eine sehr kompakte Bauform, welche Vorteile bieten kann in Bezug auf die räumliche Integration der Pumpenanordnung in das übergeordnete Gerät.According to an alternative embodiment of the invention, the siphon-like line section can be formed between the container base on the one hand and an intermediate base provided at a distance from the container base. A circumferential web is preferably provided on the intermediate floor, with a likewise circumferential seal being provided between the web of the intermediate floor and the side wall. The circumferential seal serves in particular to design the siphon-like line section in a gas-tight manner as an odor trap. The provision of the siphon-like line section between the container base and the intermediate base advantageously results in a very compact design, which can offer advantages with regard to the spatial integration of the pump arrangement in the higher-level device.

Aus den weiteren Unteransprüchen und der nachfolgenden Beschreibung sind weitere Vorteile, Merkmale und Einzelheiten der Erfindung zu entnehmen. Dort erwähnte Merkmale können jeweils einzeln für sich oder auch in beliebiger Kombination erfindungswesentlich sein. Die Zeichnungen dienen lediglich beispielhaft der Klarstellung der Erfindung und haben keinen einschränkenden Charakter.

Figur 1
einen Längsschnitt durch eine erste Ausführungsform einer erfindungsgemäßen Pumpenanordnung,
Figur 2
einen Querschnitt durch die Pumpenanordnung nach Fig. 1,
Figur 3
einen Längsschnitt durch eine zweite Ausführungsform einer erfindungsgemäßen Pumpenanordnung,
Figur 4
einen Längsschnitt durch eine dritte Ausführungsform einer erfindungsgemäßen Pumpenanordnung und
Figur 5
einen Querschnitt durch die Pumpenanordnung nach Figur 4.
Further advantages, features and details of the invention can be derived from the further subclaims and the following description. Features mentioned there can each be essential to the invention individually or in any combination. The drawings serve only by way of example to clarify the invention and are not of a restrictive nature.
Figure 1
a longitudinal section through a first embodiment of a pump arrangement according to the invention,
Figure 2
a cross section through the pump assembly according to Fig. 1 ,
Figure 3
a longitudinal section through a second embodiment of a pump arrangement according to the invention,
Figure 4
a longitudinal section through a third embodiment of a pump arrangement according to the invention and
Figure 5
a cross section through the pump assembly according to Figure 4 .

Eine erfindungsgemäße Pumpenanordnung nach den Fig. 1 und 2 umfasst als wesentliche Komponenten einen Flüssigkeitsbehälter 1, eine jedenfalls abschnittsweise in dem Flüssigkeitsbehälter 1 vorgesehene, elektromotorisch angetriebene Pumpe 2 sowie einen Verschlussdeckel 3 für den Flüssigkeitsbehälter 1. Der Flüssigkeitsbehälter 1 sieht einen Behälterboden 4 sowie eine umlaufende Seitenwand 5 vor, welche an dem Behälterboden 4 angeformt und einstückig mit diesem ausgeführt ist. Dem Behälterboden 4 gegenüberliegend ist der Verschlussdeckel 3 vorgesehen zum Verschließen einer Öffnung des Flüssigkeitsbehälters 1. Um den Verschlussdeckel 3 gegen die Seitenwand 5 des Flüssigkeitsbehälters 1 zu dichten, ist zwischen dem Verschlussdeckel 3 und der Seitenwand 5 eine umlaufende Dichtung 6 vorgesehen. Der Verschlussdeckel 3 und der Flüssigkeitsbehälter 1 sind in einer Zusammenbaustellung über eine Rastverbindung 7 formschlüssig gegeneinander festgelegt.An inventive pump arrangement according to the Fig. 1 and 2 comprises, as essential components, a liquid container 1, an electric motor-driven pump 2 provided in sections in the liquid container 1, as well as a closure cover 3 for the liquid container 1. The liquid container 1 provides a container base 4 and a circumferential side wall 5 which is formed on the container base 4 and is made in one piece with this. Opposite the container bottom 4, the closure cover 3 is provided for closing an opening of the liquid container 1. To seal the closure cover 3 against the side wall 5 of the liquid container 1, there is between the closure cover 3 and the side wall 5 a circumferential seal 6 is provided. In an assembled position, the closure cover 3 and the liquid container 1 are positively fixed to one another via a latching connection 7.

An dem Flüssigkeitsbehälter 1 ist im Bereich des Behälterbodens 4 in der gezeigten Orientierung (Einbaulage) der Pumpenanordnung an der tiefsten Stelle ein Sumpf 8 ausgebildet, in dem sich optional mit Feststoffen versetzte Flüssigkeit sammelt. Dem Sumpf 8 sind ein Pumpengehäuse 9 und ein nicht dargestelltes, in dem Pumpengehäuse 9 vorgesehenes Pumpenrad der Pumpe 2 zugeordnet. Ferner ist an dem Flüssigkeitsbehälter 1 ein Anschlussabschnitt 10 vorgesehen, an dem eine externe, nicht dargestellte Zuleitung für die Flüssigkeit angeschlossen werden kann. Der Anschlussabschnitt 10 ist dabei oberhalb des Sumpfes 8 vorgesehen.A sump 8 is formed at the lowest point of the liquid container 1 in the area of the container bottom 4 in the orientation (installation position) of the pump arrangement shown, in which liquid optionally mixed with solids collects. The sump 8 is assigned a pump housing 9 and an impeller of the pump 2 (not shown) provided in the pump housing 9. Furthermore, a connection section 10 is provided on the liquid container 1, to which an external feed line (not shown) for the liquid can be connected. The connection section 10 is provided above the sump 8.

Benachbart zu dem Anschlussabschnitt 10 ist in dem Flüssigkeitsbehälter 1 räumlich integriert ein als Geruchsstopp dienender, siphonartig ausgebildeter Leitungsabschnitt 11 vorgesehen. Der Leitungsabschnitt 11 weist drei zueinander konzentrisch angeordnete, ringförmige Wandungen 12, 13, 14 auf. Eine äußere Wandung 12 ist einstückig mit dem Behälterboden 4 des Flüssigkeitsbehälters 1 ausgebildet und ragt als erste Steigwandung 12 in Richtung des Verschlussdeckels 3 von dem Behälterboden 4 ab. Eine freie Stirnseite 15 der ersten Steigwandung 12 ist dabei dem Verschlussdeckel 3 zugewandt. Die Fallwandung 13 ist einstückig mit dem Verschlussdeckel 3 ausgeführt. Sie ragt von dem Verschlussdeckel 3 in Richtung des Behälterbodens 4 ab. Eine freie Stirnseite 16 der Fallwandung 13 ist dabei dem Behälterboden 4 zugewandt. Mit einem die freie Stirnseite 16 aufweisenden freien Ende ragt die Fallwandung 13 in die erste Steigwandung 12 des siphonartig ausgebildeten Leitungsabschnitts 11.A siphon-like conduit section 11, which serves as an odor stop, is provided in a spatially integrated manner in the liquid container 1 adjacent to the connection section 10. The line section 11 has three annular walls 12, 13, 14 arranged concentrically to one another. An outer wall 12 is formed in one piece with the container base 4 of the liquid container 1 and protrudes from the container base 4 as a first rising wall 12 in the direction of the closure cover 3. A free end face 15 of the first rising wall 12 faces the closure cover 3. The case wall 13 is made in one piece with the closure cover 3. It protrudes from the closure cover 3 in the direction of the container bottom 4. A free end face 16 of the case wall 13 faces the container bottom 4. With a free end having the free end face 16, the drop wall 13 protrudes into the first rising wall 12 of the siphon-like line section 11.

Mantelseitig umfasst die Fallwandung 13 im Bereich eines die freie Stirnseite 16 aufweisenden freien Endes derselben eine zweite Steigwandung 14, welche wie die erste Steigwandung 12 in Richtung des Verschlussdeckels 3 von dem Behälterboden 4 abragt und konzentrisch zu der ersten Steigwandung 12 vorgesehen ist. Eine freie Stirnseite 17 der zweiten Steigwandung 14 ist hierbei dem Verschlussdeckel 3 zugewandt. Die freie Stirnseite 17 der zweiten Steigwandung 14 ist - bezogen auf die Einbaulage - auf einem gleichen Höhenniveau angeordnet wie die freie Stirnseite 15 der ersten Steigwandung 12. Die zweite Steigwandung 14 schließt sich unmittelbar an den Anschlussabschnitt 10 des Flüssigkeitsbehälters 1 an. Wie die erste Steigwandung 12 ist auch die zweite Steigwandung 14 einstückig mit dem Behälterboden 4 des Flüssigkeitsbehälters 1 ausgeführt.On the shell side, the drop wall 13 includes a second rising wall 14 in the area of a free end having the free end face 16, which, like the first rising wall 12, protrudes from the container bottom 4 in the direction of the closure lid 3 and is provided concentrically to the first rising wall 12. A free end face 17 of the second rising wall 14 faces the closure cover 3. The free end face 17 of the second rising wall 14 is - based on the installation position - arranged at the same level as the free end face 15 of the first rising wall 12. The second rising wall 14 directly adjoins the connection section 10 of the liquid container 1. Like the first rising wall 12, the second rising wall 14 is also made in one piece with the container bottom 4 of the liquid container 1.

Die Pumpe 2 weist neben dem Pumpengehäuse 9 und dem darin vorgesehenen Pumpenrad einen nicht dargestellten Elektromotor und ein den Elektromotor aufnehmendes Motorengehäuse 18 auf. Als Teil des Elektromotors ist insbesondere eine in dem Motorengehäuse 18 angeordnete Ansteuerung vorgesehen sowie ein aus dem Motorengehäuse herausgeführter Anschlusskontakt 19. Des Weiteren sieht der Elektromotor einen Stator und einen drehbar in Bezug zu dem Stator an einer das Pumpenrad tragenden Welle gehaltenen Rotor vor. An dem Pumpengehäuse 9 sind benachbart zu dem Behälterboden 4 eine Zulauföffnung sowie ein Ablaufstutzen 20 vorgesehen. Ferner ist als Teil der Pumpenanordnung ein Schwimmkörper 21 realisiert, welcher höhenverstellbar beziehungsweise schwenkbar in dem Flüssigkeitsbehälter 1 angeordnet ist. In den Schwimmkörper 21 ist ein Magnet 44 eingelassen. Der Magnet 44 interagiert mit einem nicht dargestellten Wirkkörper, beispielsweise einem Hallsensor oder Reedschalter, welcher in einer Wirkkörperausnehmung 22 vorgesehen ist, die als Teil des Verschlussdeckels 3 realisiert ist. Zusätzlich sind an dem Verschlussdeckel 3 zwei Anschlussstutzen 23, 24 angeformt, welche der Verbindung der Pumpenanordnung mit zusätzlichen Leitungen, beispielsweise Kondensatleitungen, dienen.In addition to the pump housing 9 and the pump wheel provided therein, the pump 2 has an electric motor (not shown) and a motor housing 18 that accommodates the electric motor. As part of the electric motor, one is in particular in the Motor housing 18 arranged control is provided, as well as a connection contact 19 leading out of the motor housing. Furthermore, the electric motor provides a stator and a rotor which is rotatably held in relation to the stator on a shaft carrying the pump wheel. An inlet opening and an outlet connection 20 are provided on the pump housing 9 adjacent to the container bottom 4. Furthermore, a floating body 21 is implemented as part of the pump arrangement, which is arranged in the liquid container 1 in a height-adjustable or pivotable manner. A magnet 44 is embedded in the floating body 21. The magnet 44 interacts with an active body (not shown), for example a Hall sensor or reed switch, which is provided in an active body recess 22 that is implemented as part of the closure cover 3. In addition, two connection pieces 23, 24 are formed on the closure cover 3, which are used to connect the pump arrangement to additional lines, for example condensate lines.

Während des Betriebs der Pumpenanordnung wird dem Flüssigkeitsbehälter 1 die optional mit Feststoffen versetzte Flüssigkeit über die nicht dargestellte Zuleitung und den Anschlussabschnitt 10 zugeführt. Die Flüssigkeit strömt hierbei in eine Fließrichtung 25 und gelangt nach Durchtritt durch den Anschlussabschnitt 10 in den Wirkbereich des bezogen auf die Fließrichtung 25 vor der Zuleitung und dem Anschlussabschnitt 10 angeordneten und als Geruchsverschluss ausgebildeten siphonartigen Leitungsabschnitts 11. Bezogen auf die Fließrichtung 25 durchströmt die optional mit Feststoffen versetzte Flüssigkeit also zunächst die nicht dargestellte Zuleitung und gelangt dann in den bezogen auf die Fließrichtung 25 vor der Zuleitung angeordneten Anschlussabschnitt 10. Wiederum vor dem Anschlussabschnitt 10 liegt in die Fließrichtung 25 betrachtet der siphonartig gebildete Leitungsabschnitt 11, in den die Flüssigkeit nach dem Durchströmen des Anschlussabschnitts 10 gelangt. Die Wandungen 12, 13, 14 des siphonartigen Leitungsabschnitts 11 wirken hierbei labyrinthartig zusammen. Die Flüssigkeit tritt über eine im Bereich der freien Stirnseite 17 der zweiten Steigwandung 14 gebildete Öffnung 26 aus und füllt ein als Ringraum ausgebildetes Flüssigkeitsreservoir 27 des Leitungsabschnitts 11, welches zwischen der ersten Steigwandung 12 und der zweiten Steigwandung 14 gebildet ist. In den mit der Flüssigkeit gefüllten Ringraum 27 ragt die Fallwandung 13 mit dem freien Ende beziehungsweise der freien Stirnseite 16 hinein. Da die Fallwandung 13 stoffschlüssig mit dem Verschlussdeckel 3 ausgebildet ist, ist über das Flüssigkeitsreservoir 27 eine gasdichte Trennung zwischen der nicht dargestellten Zuleitung und einem die Pumpe 2 jedenfalls abschnittsweise aufnehmenden und dem Sumpf 8 aufweisenden Vorratsbereich 28 des Flüssigkeitsbehälters 1 gebildet.During operation of the pump arrangement, the liquid optionally mixed with solids is fed to the liquid container 1 via the feed line (not shown) and the connection section 10. The liquid flows in a flow direction 25 and, after passing through the connection section 10, reaches the effective area of the siphon-like line section 11, which is arranged in front of the feed line and the connection section 10 and is designed as an odor trap, relative to the flow direction 25, and optionally flows through it Liquid mixed with solids thus first enters the feed line (not shown) and then reaches the connection section 10, which is arranged upstream of the feed line in relation to the flow direction 25 of the connection section 10 arrives. The walls 12, 13, 14 of the siphon-like line section 11 interact here like a labyrinth. The liquid exits via an opening 26 formed in the area of the free end face 17 of the second rising wall 14 and fills a liquid reservoir 27, designed as an annular space, of the line section 11, which is formed between the first rising wall 12 and the second rising wall 14. The free end or the free end face 16 protrudes into the annular space 27 filled with the liquid. Since the case wall 13 is integrally formed with the closure cover 3, a gas-tight separation is formed via the liquid reservoir 27 between the supply line (not shown) and a storage area 28 of the liquid container 1 that receives the pump 2 in sections and has the sump 8.

Wenn der Ringraum 27 vollständig gefüllt ist, fließt die Flüssigkeit über eine durch die freie Stirnseite 15 und den Mantel der Fallwandung 13 definierte Ringöffnung 29 in den Vorratsbereich 28 des Flüssigkeitsbehälters 1. Die Flüssigkeit sammelt sich zunächst am tiefsten Punkt, das heißt im Bereich des Sumpfs 8 des Flüssigkeitsbehälters 1. Abhängig vom Füllstand des Flüssigkeitsbehälters 1 definiert sich die Position des Schwimmkörpers 21. Sobald der Schwimmkörper 21 eine definierte Relativposition zu dem in der Wirkkörperausnehmung 22 vorgesehenen Wirkkörper einnimmt, wird ein Steuersignal für die Pumpe 2 erzeugt. Die Pumpe 2 läuft an und die Flüssigkeit, welche über die Zulauföffnung des Pumpengehäuses 9 in ebendieses eintritt, wird über den Ablaufstutzen 20 und eine nicht dargestellte Ablaufleitung abgepumpt.When the annular space 27 is completely filled, the liquid flows through an annular opening 29 defined by the free end face 15 and the jacket of the drop wall 13 into the Storage area 28 of the liquid container 1. The liquid initially collects at the lowest point, i.e. in the area of the sump 8 of the liquid container 1. The position of the float 21 is defined depending on the fill level of the liquid container 1. As soon as the float 21 has a defined position relative to the in The active body provided for the active body recess 22 assumes a control signal for the pump 2 is generated. The pump 2 starts up and the liquid, which enters the same via the inlet opening of the pump housing 9, is pumped out via the drain connection 20 and a drain line (not shown).

Gezeigt ist exemplarisch eine erfindungsgemäße Pumpenanordnung für Gargeräte. Vorliegend gelangt die mit Feststoffen, beispielsweise Bratresten versetzte Flüssigkeit aus dem Garraum über die nicht dargestellte Zuleitung und den Anschlussabschnitt 10 in den bezogen auf die Fließrichtung 25 der Flüssigkeit vor dem Anschlussabschnitt 10 vorgesehenen Flüssigkeitsbehälter 1. Über den Ablaufstutzen 20 und die nicht dargestellte Ablaufleitung wird die Flüssigkeit entweder dem Garraum erneut zugeführt oder dem Fluidkreislauf endgültig entnommen, das heißt abgefördert.A pump arrangement according to the invention for cooking appliances is shown as an example. In the present case, the liquid mixed with solids, for example roasting residues, passes from the cooking space via the supply line (not shown) and the connection section 10 into the liquid container 1 provided in front of the connection section 10 in relation to the flow direction 25 of the liquid Liquid either fed back into the cooking space or finally removed from the fluid circuit, that is to say conveyed away.

Eine erfindungsgemäße Pumpenanordnung kann alternativ vorgesehen werden in Wasser führenden Haushaltsgeräten, beispielsweise in Geschirrspülmaschinen oder Waschmaschinen, in gewerblichen Wasser führenden Geräten oder im Sanitäranlagenbau.A pump arrangement according to the invention can alternatively be provided in domestic appliances which carry water, for example in dishwashers or washing machines, in commercial appliances which carry water or in sanitary facilities.

Während nach dem ersten Ausführungsbeispiel der Erfindung gemäß den Fig. 1 und 2 der siphonartig ausgebildete Leitungsabschnitt 11 der Pumpenanordnung durch die drei einander konzentrisch zugeordnete, labyrinthartig zusammenwirkende Wandungen 12, 13, 14 gebildet ist, sieht eine zweite Ausführungsform einer erfindungsgemäßen Pumpenanordnung nach der Fig. 3 zwei scheibenartige Wandungen 32, 33 vor. Eine erste Wandung 32 ist dabei als eine einstückig mit dem Verschlussdeckel 3 ausgebildete Fallwandung 32 realisiert, welche sich parallel zu einem den Anschlussabschnitt 10 der Pumpenanordnung aufweisenden Seitenwandabschnitt 5' erstreckt. Eine freie Randkante 34 der Fallwandung 32 ist hierbei dem Behälterboden 4 zugewandt vorgesehen. Eine zweite Wandung 33 ist als Steigwandung 33 realisiert. Die Steigwandung 33 ragt von dem Behälterboden 4 in Richtung des Verschlussdeckels 3 der Pumpenanordnung ab. Eine freie Randkante 36 der Steigwandung 33 ist bezogen auf die dargestellte Einbaulage der Pumpenanordnung oberhalb der freien Randkante 34 der Fallwandung 32 vorgesehen. Die Steigwandung 33 ist parallel zur Fallwandung 32 orientiert. Während die Steigwandung 33 bevorzugt einstückig mit der Seitenwand 5 verbunden ist, sind zwischen der Fallwandung 32 und der Seitenwand 5 nicht dargestellte Dichtungen vorgesehen zur Realisierung einer gasdichten Verbindung der Fallwandung 32 mit der Seitenwand 5 des Flüssigkeitsbehälters 1.While according to the first embodiment of the invention according to the Fig. 1 and 2 the siphon-like line section 11 of the pump arrangement is formed by the three concentrically associated, labyrinthine cooperating walls 12, 13, 14, provides a second embodiment of a pump arrangement according to the invention according to FIG Fig. 3 two disk-like walls 32, 33 in front. A first wall 32 is implemented as a drop wall 32 which is formed in one piece with the closure cover 3 and extends parallel to a side wall section 5 ′ having the connection section 10 of the pump arrangement. A free edge 34 of the case wall 32 is provided facing the container bottom 4. A second wall 33 is implemented as a rising wall 33. The rising wall 33 protrudes from the container bottom 4 in the direction of the closure cover 3 of the pump arrangement. A free edge 36 of the rising wall 33 is provided above the free edge 34 of the drop wall 32 in relation to the installation position of the pump arrangement shown. The rising wall 33 is oriented parallel to the falling wall 32. While the rising wall 33 is preferably connected in one piece to the side wall 5, seals (not shown) are provided between the drop wall 32 and the side wall 5 to realize a gas-tight connection of the drop wall 32 with the side wall 5 of the liquid container 1.

Gleiche Bauteile und Bauteilfunktionen sind durch gleiche Bezugszeichen gekennzeichnet.The same components and component functions are identified by the same reference symbols.

Ein zwischen der Steigwandung 33 und dem den Anschlussabschnitt 10 aufweisenden Seitenwandabschnitt 5' gebildetes Flüssigkeitsreservoir 35 des in die Fließrichtung 25 der optional mit Feststoffen versetzte Flüssigkeit betrachtet vor dem Anschlussabschnitt 10 angeordneten, siphonartig ausgebildeten Leitungsabschnitts 11 wird beim Zufluss von Flüssigkeit über die nicht dargestellte Zuleitung und den bezogen auf die Fließrichtung 25 der Flüssigkeit vor der Zuleitung gelegenen Anschlussabschnitt 10 zunächst gefüllt. Da die Fallwandung 32 bis in den Bereich des Flüssigkeitsreservoirs 35 hineinragt, ist wie gehabt eine gasdichte Trennung der nicht dargestellten Zuleitung von dem Vorratsbereich 28 des Flüssigkeitsbehälters 1 realisiert. Die labyrinthartig angeordneten Wandungen 32, 33 des siphonartigen Leitungsabschnitts 11 wirken insofern als Geruchsstopp. Zugleich ist durch das horizontale Höhenniveau der freien Randkante 36 der Steigwandung 33 relativ zum Sumpf 8 des Flüssigkeitsbehälters 1 sichergestellt, dass das Flüssigkeitsreservoir 35 auch dann von der optional mit Feststoffen versetzten Flüssigkeit gefüllt ist, wenn die Flüssigkeit aus dem Vorratsbereich 28 vollständig oder nahezu vollständig abgefördert ist.A siphon-like line section 11, formed between the rising wall 33 and the side wall section 5 'having the connection section 10, of the siphon-like line section 11, viewed in the direction of flow 25 of the liquid optionally mixed with solids, is arranged in front of the connection section 10 when liquid flows in via the supply line and, not shown the connection section 10 located upstream of the feed line in relation to the flow direction 25 of the liquid is initially filled. Since the case wall 32 protrudes into the area of the liquid reservoir 35, a gas-tight separation of the feed line (not shown) from the storage area 28 of the liquid container 1 is realized as before. The walls 32, 33 of the siphon-like line section 11, which are arranged like a labyrinth, act as an odor stop. At the same time, the horizontal level of the free edge 36 of the rising wall 33 relative to the sump 8 of the liquid container 1 ensures that the liquid reservoir 35 is also filled with the liquid optionally mixed with solids when the liquid is completely or almost completely conveyed away from the storage area 28 is.

Nach einer dritten alternativen Ausführungsform der erfindungsgemäßen Pumpenanordnung gemäß der Fig. 4 und 5 ist der als Geruchsstopp ausgebildete siphonartige Leitungsabschnitt 11 im Bereich des Behälterbodens 4 gebildet. Hierbei ist ein sich im Wesentlichen parallel zum Behälterboden 4 erstreckender Zwischenboden 40 vorgesehen. An dem Zwischenboden 40 ist randseitig ein umlaufender Steg 41 ausgebildet. Der Steg 41 dient zur Aufnahme einer umlaufenden Dichtung 42, welche in der dargestellten Zusammenbaustellung zwischen der Seitenwand 5 und dem Steg 41 des Zwischenbodens 40 vorgesehen ist. Der siphonartige, abgewinkelt ausgebildete Leitungsabschnitt 11 ist demzufolge gasdicht zwischen dem Behälterboden 4, der Seitenwand 5 und dem Zwischenboden 40 gebildet. In dem Zwischenboden 40 ist eine Durchtrittsöffnung 43 für die optional mit Feststoffen versetzte Flüssigkeit vorgesehen. Über die Durchtrittsöffnung 43 gelangt die Flüssigkeit in den oberhalb des Zwischenbodens 40 gebildeten Sumpf 8 des Flüssigkeitsbehälters 1. Wird die Pumpe 2 der Pumpenanordnung betrieben und die optional mit Feststoffen versetzte Flüssigkeit aus dem Vorratsbereich 28 des Flüssigkeitsbehälters 1 abgefördert, so verbleibt stets Restflüssigkeit in dem tief liegenden Teil des siphonartigen Leitungsabschnitts 11, der als Flüssigkeitsreservoir dient. Der teilweise mit Flüssigkeit befüllte Leitungsabschnitt 11 wirkt insofern als Geruchsstopp und verhindert den Durchtritt von übel riechenden Gasen.According to a third alternative embodiment of the pump arrangement according to the invention according to FIG Fig. 4 and 5 the siphon-like line section 11, designed as an odor stop, is formed in the region of the container bottom 4. In this case, an intermediate base 40 extending essentially parallel to the container base 4 is provided. A circumferential web 41 is formed on the edge of the intermediate floor 40. The web 41 serves to accommodate a circumferential seal 42, which is provided between the side wall 5 and the web 41 of the intermediate floor 40 in the assembly position shown. The siphon-like, angled line section 11 is consequently formed gas-tight between the container bottom 4, the side wall 5 and the intermediate bottom 40. A passage opening 43 for the liquid optionally mixed with solids is provided in the intermediate base 40. Via the passage opening 43, the liquid reaches the sump 8 of the liquid container 1 formed above the intermediate floor 40. If the pump 2 of the pump arrangement is operated and the liquid optionally mixed with solids is conveyed away from the storage area 28 of the liquid container 1, residual liquid always remains in the deep lying part of the siphon-like line section 11, which serves as a liquid reservoir. The line section 11, which is partially filled with liquid, acts as an odor stop and prevents the passage of malodorous gases.

Claims (13)

  1. Pump assembly comprising
    - a pump (2) that can be driven by an electric motor, is intended for conveying a liquid and comprises a pump wheel held on a rotating shaft and a pump housing (9) which encloses the pump wheel at least in portions and on which an inlet opening for the liquid and an outlet nozzle (20) for the liquid are provided,
    - a liquid container (1) that is designed to receive the liquid and comprises a container base (4), a side wall (5) and an opening opposite the container base (4), a connection portion (10) for an external supply line and a sump (8) designed to receive the pump wheel and the pump housing (9) being provided on the liquid container (1), and
    - a siphon-like line portion (11) for the liquid, which portion acts as an odour stop,
    the siphon-like line portion (11), as viewed in a flow direction (25) of the liquid, being provided upstream of the connection portion (10) of the liquid container (1) such that, during operation, flow passes first through the connection portion (10) and then through the siphon-like line portion (11), the siphon-like line portion (11) designed as the odour stop being provided so as to be spatially integrated in the liquid container (1), characterised in that a floating body (21) is produced which is height-adjustably or pivotably arranged in the liquid container (1), a magnet (44) being embedded in the floating body (21), which magnet interacts with an active body provided in an active-body recess (22), the active-body recess (22) being produced as part of a closure cover (3), the position of the floating body (21) being defined according to the fill level of the liquid container (1), a control signal for the pump (2) being generated as soon as the floating body (21) assumes a defined relative position with respect to the active body.
  2. Pump assembly according to claim 1, wherein the liquid has solids and/or is mixed with solids.
  3. Pump assembly according to either claim 1 or claim 2, characterised in that the closure cover (3) is provided as a closure cover (3) which can be placed on the side wall (5) of the liquid container (1) in order to close the opening, a circumferential seal (6) preferably being provided between the closure cover (3) and the side wall (5).
  4. Pump assembly according to any of claims 1 to 3, characterised in that the siphon-like line portion (11) provides a plurality of walls (12, 13, 14, 32, 33) which are associated with one another in a labyrinth-like manner and which extend within the boundary of the side wall (5) of the liquid container (1).
  5. Pump assembly according to any of claims 1 to 4, characterised in that a first rising wall (12, 33) extending from the container base (4) towards the opening is provided as part of the siphon-like line portion (11), and/or in that a falling wall (13, 32) extending from the closure cover (3) towards the container base (4) is provided as part of the siphon-like line portion (11).
  6. Pump assembly according to claim 5, characterised in that the rising wall (12, 14, 33) protrudes from the container base (4) and/or is integral with the container base (4) and/or the side wall (5) of the liquid container (1), and/or in that the falling wall (13, 32) protrudes from the closure cover (3) and/or is integral with the closure cover (3).
  7. Pump assembly according to either claim 5 or claim 6, characterised in that the first rising wall (12) and/orthe falling wall (13) of the siphon-like line portion (11) are annular and/or enclose one another, preferably concentrically.
  8. Pump assembly according to claim 7, characterised in that a free end of the first rising wall (12) facing the closure cover (3) encloses a free end of the falling wall facing the container base (4) on the outer side (13).
  9. Pump assembly according to any of claims 5 to 8, characterised in that, in an assembled position, a free end face (15) of the first rising wall (12) facing the closure cover (3) is provided at a distance from the closure cover (3) and/or a second free end face (16) of the falling wall (13) facing the container base (4) is provided at a distance from the container base (4).
  10. Pump assembly according to any of claims 5 to 9, characterised in that a second rising wall (14) of the siphon-like line portion (11) is provided, which wall protrudes from the container base (4) towards the opening and is preferably arranged concentrically with respect to the first rising wall (12) and/or the falling wall (13), and/or a free end of which that faces the closure cover (3) protrudes into the free end of the falling wall (13) of the siphon-like line portion (11), and/or in that the free end of the first rising wall (12) and the free end of the second rising wall (14) are provided at the same horizontal height level.
  11. Pump assembly according to claim 10, characterised in that the walls (12, 13, 14) are stacked one inside the other in a cascade-like manner and/or have a different diameter or a different cross section.
  12. Pump assembly according to any of claims 1 to 11, characterised in that the siphon-like line portion (11) is formed between the container base (4) and an intermediate base (40) provided at a distance from the container base (4), the intermediate base (40) providing a circumferential protrusion (41), and a circumferential seal (42) being provided between the protrusion (41) of the intermediate base (40) and the side wall (5).
  13. Pump assembly according to any of claims 1 to 12, characterised in that the siphon-like line portion (11) is provided so as to be integrated in the liquid container (1) such that the liquid that is mixed with solids and supplied via the connection portion (10) flows initially through the siphon-like line portion (11) by means of a liquid reservoir (27, 35) formed as part of the siphon-like line portion (11) and, after leaving the siphon-like line portion (11), can be removed from the liquid container (1) by means of the electrically drivable pump (2).
EP16020220.6A 2015-06-08 2016-06-07 Pump assembly Active EP3104016B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015108977.7A DE102015108977B4 (en) 2015-06-08 2015-06-08 Pump arrangement

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EP3104016A1 EP3104016A1 (en) 2016-12-14
EP3104016B1 true EP3104016B1 (en) 2020-09-09

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5868011A (en) * 1997-04-04 1999-02-09 General Electric Company Water traps for washing machines

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000051134A (en) * 1998-08-17 2000-02-22 Mitsubishi Electric Corp Built-in dishwasher
KR101270538B1 (en) * 2006-07-12 2013-06-03 삼성전자주식회사 A tableware washing machine
EP1930493A1 (en) * 2006-12-04 2008-06-11 Bonferraro S.p.A. Washing machine with integrated sink
ATE430226T1 (en) * 2007-01-15 2009-05-15 Kessel Gmbh LIFTING SYSTEM

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5868011A (en) * 1997-04-04 1999-02-09 General Electric Company Water traps for washing machines

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DE102015108977B4 (en) 2021-10-21
EP3104016A1 (en) 2016-12-14

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