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EP1209275B1 - Device for pumping out washing water in a washing machine - Google Patents

Device for pumping out washing water in a washing machine Download PDF

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Publication number
EP1209275B1
EP1209275B1 EP01124895A EP01124895A EP1209275B1 EP 1209275 B1 EP1209275 B1 EP 1209275B1 EP 01124895 A EP01124895 A EP 01124895A EP 01124895 A EP01124895 A EP 01124895A EP 1209275 B1 EP1209275 B1 EP 1209275B1
Authority
EP
European Patent Office
Prior art keywords
housing
discharge pump
solution
connecting member
duct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01124895A
Other languages
German (de)
French (fr)
Other versions
EP1209275A2 (en
EP1209275A3 (en
Inventor
Edwin Bolduan
Wolfgang Proppe
Horst Wiemer
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1209275A2 publication Critical patent/EP1209275A2/en
Publication of EP1209275A3 publication Critical patent/EP1209275A3/en
Application granted granted Critical
Publication of EP1209275B1 publication Critical patent/EP1209275B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/086—Arrangements for avoiding detergent wastage in the discharge conduit

Definitions

  • the invention relates to a Laugenabpumpstrang for a washing machine, which contains a return container whose volume is such that when the drain pump is switched off, a predetermined amount of liquor can flow back through the drain pump under the washing drum of the washing machine by gravity, the return tank at the bottom with an inlet and top provided with an outlet for the liquor to be pumped.
  • a washing machine with a Laugenabpumpstrang of this kind is out DE 69 23 774 U and from DE 35 06 761 A1 known.
  • the Laugenabpumpstrang contains a return tank whose volume is such that when the drain pump is switched off, a predetermined amount of liquor can flow back through the drain pump under the washing drum by gravity, the return tank is provided at the bottom with an inlet and above with an outlet for the liquor to be pumped.
  • the container according to DE 35 05 781 A1 has a two-part housing with a horizontal parting plane between the lower housing part and the upper housing part.
  • the two housing parts are plastic injection-molded parts, which must be fixed relative to each other at their parting plane and welded together.
  • a plastic corrugated tube is connected as Abpumpschlauch via a seal to a sleeve and secured by a hose clamp against unintentional disconnection from the return tank to the return tank.
  • the object to be achieved the return container form such that it is cheaper to produce, in particular such that said welding and / or said leak test are no longer necessary.
  • the return tank has a one-piece, injection-molded housing having at least at its lower end portion a circular cylindrical shape and an inner diameter which is larger than that Outer diameter of a provided at the inlet lower Abpumptechnischs commentedes, which is directed from bottom to top in the housing, that a ring-shaped in cross-section connecting piece is provided, which in the peripheral region between the lower Abpump effetsoutheastern and the housing an annular Caseback forms, wherein the connecting piece is sealed at its radially inner Umflinds Suite against the lower Abpumptechnischs founded and at its radially outer peripheral portion against the housing and is axially secured against unintentional disconnection.
  • the housing is preferably made of plastic.
  • This return tank which is produced as an injection molded part, is preferably connected in a watertight manner with a plastic drain hose in a form-fitting manner.
  • the flexible Abpumpschlauch may for example be a so-called corrugated tube.
  • Its positive connection with the return tank is preferably carried out by a plug connection, preferably by a plug-and-lock connection, which may be detachable or non-detachable.
  • the interlocking connection between pumping hose and return tank prevents hose clamps and similar clamping elements.
  • a rubber or plastic sleeve can be pushed on, whose inner diameter seals against the pumping hose and whose outer diameter seals against the return tank from the inside.
  • a sleeve in another embodiment, can be molded or vulcanized on the one hand at the end of Abpumpschlauches and on the other hand be sealingly arranged in the inner diameter or preferably on the outer diameter of the return tank.
  • a hose clamp can additionally be used.
  • washing machine 4 In a drum-shaped tub 2 of in Fig. 1 washing machine 4 is shown a washing drum 6 rotatably mounted about a horizontal axis.
  • the tub 2 can be supplied via a line 8, a solenoid valve 10 and a Waschstoffein Kunststoff Road 12 water.
  • the machine housing 14 and the highest attainable in the tub 10 water level 16 are shown schematically by dashed lines.
  • a drain line 20 To the bottom 18 of the tub 2, a drain line 20 is connected, which leads via a Flusenabscheider 22 to the suction side of a drain pump 24.
  • a drain hose 25, 26 is connected, which consists of a lower Abpumptechnischs laminate 25 and an upper Abpump effetsogni 26 which are interconnected by a return tank 30, wherein the two Abpump effets laminatee are bendable and preferably so-called corrugated tubing.
  • the upper discharge line 26 may be connected to a drain or hung in a drainage basin 28.
  • the volume of the return tank 30 is about so large that after pumping out of the liquor, when the drain pump 24 is turned off, coming from the Abpumpschlauch 25, 26 and the return tank 30 through the drain pump 24 leaches at a level which is approximately is at the height of the bottom portion 18 of the tub 2. This ensures that with subsequent addition of detergent from the Waschstoffein Letnd 12 this detergent does not disappear in the drain line 21 at the bottom 18 of the tub 2, but is rinsed by the also newly added water of the water pipe 8 in the laundry drum 6.
  • the housing of the return tank 30 is a one-piece housing, which is produced by injection molding.
  • it is an injection molded plastic body.
  • the return tank 30 of Fig. 1 can be realized in different ways. Some of these are below with reference to the Figures 2 . 3 and 4 described.
  • tubs 30-2, 30-3 and 30-4 each have a manufactured by injection molding one-piece housing 32 made of plastic, which preferably has a circular cylindrical shape with a vertical cylinder axis, at least at its lower end portion.
  • Both Figures 2 . 3 and 4 has the housing 32 at least at its lower end a Inner diameter, which is greater than the outer diameter of the connected at the lower inlet 34 Abpumptechnischs Swisses 25. This lower Abpump effets Gla 25 is directed upward into the housing 32.
  • the lower Abpump Gustavs Culture 25 is extended by a line end 44 which opens into the housing 32 and the radial inner boundary of acting as a coarse chamber trap, preferably annular gap 46 which radially outward of a line end piece 44 at a distance radially opposite peripheral wall 48 of Housing 32 ( Fig. 4 ) is limited according to the Figures 2 . 3 and 4 , and according to the Figures 2 and 3 may also be partially limited by the connecting piece 36.
  • the radially outer peripheral wall of the intermediate space 46 may be formed exclusively by the connecting piece 36, when its housing bottom 38 is deposited correspondingly deep below the housing 32.
  • the conduit end piece 44 preferably has at least one opening 50, which is preferably formed by one or more slots in its longitudinal direction, through which liquor from the chamber 46 serving as a coarse chamber trap can flow back into the lower Abpump effets committee 25 when the drain pump 24 after pumping lye is switched off.
  • the coarse chamber trap formed by the space 46 is used to collect "coarse” parts in the liquor such as buttons, needles, screws and similar parts that can get into the laundry drum 6 and from this in the return tank with the laundry, where they from the in the center of the housing 32 upwardly flowing liquor are flushed radially outward and can fall back into the intermediate space 46 (coarse chamber trap).
  • the connector is formed in that the connecting piece 36 is formed at its upper end portion 52 as a sleeve which is plugged (or inserted) on (or in) the lower end portion of the housing 32 and has a larger diameter than the tubular lower end portion 54 of Connecting piece 36.
  • the upper, designed as a sleeve end portion 52 of the connecting piece 36 is adapted to the diameter of the housing 32.
  • the upper end portion 52 of the connector 36 may be welded or adhered to the lower end portions of the axial fixation case 32. According to Fig.
  • the upper end portion 52 of the connector 36 may be provided with a detent lug 56 which engages a recess 58 on the outer periphery of the housing 32, thereby preventing unintentional disconnection of the connector 36 from the housing 32. Between both elements, a seal 60 may be used. The detent nose 56 and the recess 58 may be reversed.
  • conduit end 44 together with the pump-down conduit 25 may be an integral part, or may be detachably connected thereto, or preferably inseparable from injection or scorching or coextrusion.
  • the conduit end 44 together with the housing 32 and the housing bottom 38 may be an integral part.
  • the connecting piece 36-4 is an annular sealing body which is inserted between the line end piece 44 of the lower Abpumptechnischs Kunststoffes 25 and the outer surrounding housing 32 and bears watertight on both.
  • the seal body 36-4 is preferably inserted into an outer circumferential groove 60 of the conduit end piece 44 and axially secured by the groove walls so that it can axially snap past the inwardly projecting detent projections 62 of the housing 32 upon insertion of the conduit end piece 44 into the housing 32 and then from there Latch projections 62 is prevented from slipping out of the housing 32.
  • an outlet 64 In the housing 32 is at height above the lower inlet 34 an outlet 64, preferably in the form of a sleeve extending transversely to the vertical direction, to which the upper pumping line piece 26 is connected, preferably being connected, with or without a latching connection. This connection is watertight, for example, by sealing rings 66.
  • the upper outlet 64 is preferably at or near the top of the housing 32. According to another embodiment, the housing 32 may be extended upwardly beyond the upper outlet.
  • an additional opening 68 is formed in the housing 32, e.g. as a vent or for the connection of a pressure sensor or a liquid sensor for the detection of alkali or water in the housing 32nd
  • the housing 32 In order for the housing 32 to be made in one piece by injection molding, it must have an opening at one end, from which the tool core can be pulled out at the end of the injection molding process. This opening may be at the lower or upper end of the housing 32. In the embodiments of the Figures 2 . 3 and 4 This opening therefore forms the lower inlet 34. According to embodiments not shown, it is therefore also possible to provide the opening required for pulling out the injection-molding core at the upper end of the housing 32. In this case, an embodiment of the invention is that the housing bottom 38 and also the line end 44 of the lower Abpumptechnischs Kunststoffes 35 are produced as an integral part of the housing 32 by means of an injection molding process.
  • a further embodiment may be to make the upper Abpump effets consultancy 26 together with the housing 32 by injection molding as a one-piece part.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Detergent Compositions (AREA)
  • Slot Machines And Peripheral Devices (AREA)
  • Lubricants (AREA)

Abstract

The arrangement has a return flow tank (30) whose volume is selected so that with the washing solution pump (24) off a predefined quantity of washing solution can flow back through the pump below the washing drum under gravity. The tank has a lower inlet and an upper outlet for the washing solution and a one-piece housing manufactured by injection molding.

Description

Die Erfindung betrifft einen Laugenabpumpstrang für eine Waschmaschine, welcher einen Rücklaufbehälter enthält, dessen Volumen so bemessen ist, dass bei abgeschalteter Laugenpumpe eine vorbestimmte Laugenmenge durch die Laugenpumpe hindurch unter die Wäschetrommel der Waschmaschine durch Schwerkraft zurückströmen kann, wobei der Rücklaufbehälter unten mit einem Einlass und oben mit einem Auslass für die abzupumpende Lauge versehen ist.The invention relates to a Laugenabpumpstrang for a washing machine, which contains a return container whose volume is such that when the drain pump is switched off, a predetermined amount of liquor can flow back through the drain pump under the washing drum of the washing machine by gravity, the return tank at the bottom with an inlet and top provided with an outlet for the liquor to be pumped.

Eine Waschmaschine mit einem Laugenabpumpstrang dieser Art ist aus DE 69 23 774 U und aus DE 35 06 761 A1 bekannt. Der Laugenabpumpstrang enthält einen Rücklaufbehälter, dessen Volumen so bemessen ist, dass bei abgeschalteter Laugenpumpe eine vorbestimmte Laugenmenge durch die Laugenpumpe hindurch unter die Wäschetrommel durch Schwerkraft zurückströmen kann, wobei der Rücklaufbehälter unten mit einem Einlass und oben mit einem Auslass für die abzupumpende Lauge versehen ist. Der Behälter gemäß DE 35 05 781 A1 hat ein zweiteiliges Gehäuse mit einer horizontalen Trennebene zwischen dem unteren Gehäuseteil und dem oberen Gehäuseteil. Die beiden Gehäuseteile sind Kunststoff-Spritzgussteile, die an ihrer Trennebene relativ zueinander fixiert und miteinander verschweißt werden müssen. Anschließend ist eine Prüfung auf hundertprozentige Dichtigkeit des Rücklaufbehälters erforderlich. In der Praxis ist an den Rücklaufbehälter ein Kunststoff-Wellrohrschlauch als Abpumpschlauch über eine Dichtung an eine Muffe angeschlossen und durch eine Schlauchklemme gegen unbeabsichtigtes Trennen vom Rücklaufbehälter gesichert.A washing machine with a Laugenabpumpstrang of this kind is out DE 69 23 774 U and from DE 35 06 761 A1 known. The Laugenabpumpstrang contains a return tank whose volume is such that when the drain pump is switched off, a predetermined amount of liquor can flow back through the drain pump under the washing drum by gravity, the return tank is provided at the bottom with an inlet and above with an outlet for the liquor to be pumped. The container according to DE 35 05 781 A1 has a two-part housing with a horizontal parting plane between the lower housing part and the upper housing part. The two housing parts are plastic injection-molded parts, which must be fixed relative to each other at their parting plane and welded together. Subsequently, a check for 100% tightness of the return tank is required. In practice, a plastic corrugated tube is connected as Abpumpschlauch via a seal to a sleeve and secured by a hose clamp against unintentional disconnection from the return tank to the return tank.

Durch die Erfindung soll die Aufgabe gelöst werden, den Rücklaufbehälter derart auszubilden, dass er preiswerter herstellbar ist, Insbesondere derart, dass das genannte Schweißen und/oder die genannte Dichtigkeitsprüfung nicht mehr erforderlich sind.By the invention, the object to be achieved, the return container form such that it is cheaper to produce, in particular such that said welding and / or said leak test are no longer necessary.

Diese Aufgabe wird gemäß der Erfindung durch die Merkmale des Kennzeichens von Anspruch 1 In der Welse gelöst, dass der Rücklaufbehälter ein einstückiges, im Spritzgussverfahren hergestelltes Gehäuse aufweist, das mindestens an seinem unteren Endabschnitt eine kreiszylindrische Form und einen Innendurchmesser hat, der größer ist als der Außendurchmesser eines am Einlass vorgesehenen unteren Abpumpleitungsstückes, welches von unten nach oben in das Gehäuse gerichtet Ist, dass ein im horizontalen Querschnitt ringförmiges Verbindungsstück vorgesehen ist, welches im Umfangsbereich zwischen dem unteren Abpumpleitungsstück und dem Gehäuse einen ringförmigen Gehäuseboden bildet, wobei das Verbindungsstück an seinem radial inneren Umfängsbereich gegen das untere Abpumpleitungsstück und an seinem radial äußeren Umfangsbereich gegen das Gehäuse gedichtet ist und je axial gesichert ist gegen unbeabsichtigtes Trennen.This object is achieved according to the invention by the features of the characterizing part of claim 1 in the catfish that the return tank has a one-piece, injection-molded housing having at least at its lower end portion a circular cylindrical shape and an inner diameter which is larger than that Outer diameter of a provided at the inlet lower Abpumpleitungsstückes, which is directed from bottom to top in the housing, that a ring-shaped in cross-section connecting piece is provided, which in the peripheral region between the lower Abpumpleitungsstück and the housing an annular Caseback forms, wherein the connecting piece is sealed at its radially inner Umfängsbereich against the lower Abpumpleitungsstück and at its radially outer peripheral portion against the housing and is axially secured against unintentional disconnection.

Das Gehäuse besteht vorzugsweise aus Kunststoff.The housing is preferably made of plastic.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Dieser als Spritzgussteil hergestellte Rücklaufbehälter wird vorzugsweise formschlüssig mit einem Kunststoff-Abpumpschlauch wasserdicht verbunden. Der flexible Abpumpschlauch kann beispielsweise ein sogenannter Wellrohrschlauch sein. Seine formschlüssige Verbindung mit dem Rücklaufbehälter erfolgt vorzugsweise durch eine Steckverbindung, vorzugsweise durch eine Steck-Rast-Verbindung, welche lösbar oder unlösbar ausgebildet sein kann. Durch die formschlüssige (ineinander greifende) Verbindung zwischen Abpumpschlauch und Rücklaufbehälter werden Schlauchklemmen und ähnliche Spannelemente vermieden.This return tank, which is produced as an injection molded part, is preferably connected in a watertight manner with a plastic drain hose in a form-fitting manner. The flexible Abpumpschlauch may for example be a so-called corrugated tube. Its positive connection with the return tank is preferably carried out by a plug connection, preferably by a plug-and-lock connection, which may be detachable or non-detachable. The interlocking connection between pumping hose and return tank prevents hose clamps and similar clamping elements.

Eine Möglichkeit besteht darin, einen derart geformten flexiblen Abpumpschlauch, z.B. Wellrohrschlauch zu verwenden, dass eine Muffe aus Gummi oder Kunststoff aufgeschoben werden kann, deren innerer Durchmesser gegen den Abpumpschlauch dichtet und deren äußerer Durchmesser von innen gegen den Rücklaufbehälter dichtet.One possibility is to use such a shaped flexible pumping tube, e.g. To use a corrugated hose, a rubber or plastic sleeve can be pushed on, whose inner diameter seals against the pumping hose and whose outer diameter seals against the return tank from the inside.

Bei einem anderen Ausführungsbeispiel der Erfindung kann eine Muffe einerseits am Ende des Abpumpschlauches angespritzt oder anvulkanisiert sein und andererseits in dem Innendurchmesser oder vorzugsweise auf dem Außendurchmesser des Rücklaufbehälters dichtend angeordnet sein. Zur Absicherung der Dichtungswirkung kann eine Schlauchklemme zusätzlich verwendet werden.In another embodiment of the invention, a sleeve can be molded or vulcanized on the one hand at the end of Abpumpschlauches and on the other hand be sealingly arranged in the inner diameter or preferably on the outer diameter of the return tank. To secure the sealing effect, a hose clamp can additionally be used.

Die Erfindung wird im Folgenden mit Bezug auf die Zeichnungen anhand von bevorzugten Ausführungsformen als Beispiele beschrieben. In den Zeichnungen zeigen

Fig. 1
schematisch im Vertikalschnitt eine Waschmaschine mit einem Laugenabpumpstrang nach der Erfindung,
Fig. 2
einen Vertikalschnitt einer besonderen Ausführungsform eines Laugenabpumpbehälters von Fig. 1,
Fig. 3
einen Vertikalschnitt einer weiteren Ausführungsform des Laugenabpumpbehälters von Fig. 1,
Fig. 4
einen Vertikalschnitt einer nochmals weiteren Ausführungsform des Laugenabpumpbehälters von Fig. 1.
The invention will now be described by way of example with reference to the drawings of preferred embodiments. In the drawings show
Fig. 1
schematically in vertical section a washing machine with a Laugenabpumpstrang according to the invention,
Fig. 2
a vertical section of a particular embodiment of a Laugenabpumpbehälters of Fig. 1 .
Fig. 3
a vertical section of another embodiment of the Laugenabpumpbehälters of Fig. 1 .
Fig. 4
a vertical section of yet another embodiment of the Laugenabpumpbehälters of Fig. 1 ,

In einem trommelförmigen Laugenbehälter 2 der in Fig. 1 dargestellten Waschmaschine 4 ist eine Wäschetrommel 6 um eine Horizontalachse drehbar gelagert. Dem Laugenbehälter 2 kann über eine Leitung 8, ein Magnetventil 10 und eine Waschmitteleinspüleinrichtung 12 Wasser zugeführt werden. Das Maschinengehäuse 14 und das höchste im Laugenbehälter 10 erreichbare Wasserniveau 16 sind durch gestrichelte Linien schematisch dargestellt. An den Boden 18 des Laugenbehälters 2 ist eine Ablaufleitung 20 angeschlossen, die über einen Flusenabscheider 22 zu der Saugseite einer Laugenpumpe 24 führt. An die Druckseite der Laugenpumpe 24 ist ein Ablaufschlauch 25, 26 angeschlossen, der aus einem unteren Abpumpleitungsstück 25 und einem oberen Abpumpleitungsstück 26 besteht, die durch einen Rücklaufbehälter 30 miteinander verbunden sind, wobei die beiden Abpumpleitungsstücke biegbar sind und vorzugsweise so genannte Wellrohrschläuche sind. Das obere Abpumpleitungsstück 26 kann an einen Abfluss angeschlossen oder in ein Wasserabflussbecken 28 gehängt werden.In a drum-shaped tub 2 of in Fig. 1 washing machine 4 is shown a washing drum 6 rotatably mounted about a horizontal axis. The tub 2 can be supplied via a line 8, a solenoid valve 10 and a Waschmitteleinspüleinrichtung 12 water. The machine housing 14 and the highest attainable in the tub 10 water level 16 are shown schematically by dashed lines. To the bottom 18 of the tub 2, a drain line 20 is connected, which leads via a Flusenabscheider 22 to the suction side of a drain pump 24. To the pressure side of the drain pump 24, a drain hose 25, 26 is connected, which consists of a lower Abpumpleitungsstück 25 and an upper Abpumpleitungsstück 26 which are interconnected by a return tank 30, wherein the two Abpumpleitungsstücke are bendable and preferably so-called corrugated tubing. The upper discharge line 26 may be connected to a drain or hung in a drainage basin 28.

Das Volumen des Rücklaufbehälters 30 ist ungefähr so groß, dass nach dem Abpumpen von Lauge, wenn die Laugenpumpe 24 abgestellt wird, die aus dem Abpumpschlauch 25, 26 und dem Rücklaufbehälter 30 durch die Laugenpumpe 24 zurückströmende Lauge auf einem Niveau zu stehen kommt, welches ungefähr auf der Höhe des Bodenbereiches 18 des Laugenbehälters 2 liegt. Dadurch wird sichergestellt, dass bei anschließender Zugabe von Waschmittel aus der Waschmitteleinspüleinrichtung 12 dieses Waschmittel nicht in der Abflussleitung 21 am Boden 18 des Laugenbehälters 2 verschwindet, sondern von dem ebenfalls neu hinzuzuführenden Wasser der Wasserleitung 8 in die Wäschetrommel 6 gespült wird.The volume of the return tank 30 is about so large that after pumping out of the liquor, when the drain pump 24 is turned off, coming from the Abpumpschlauch 25, 26 and the return tank 30 through the drain pump 24 leaches at a level which is approximately is at the height of the bottom portion 18 of the tub 2. This ensures that with subsequent addition of detergent from the Waschmitteleinspüleinrichtung 12 this detergent does not disappear in the drain line 21 at the bottom 18 of the tub 2, but is rinsed by the also newly added water of the water pipe 8 in the laundry drum 6.

Gemäß der Erfindung ist das Gehäuse des Rücklaufbehälters 30 ein einstückiges Gehäuse, welches im Spritzgussverfahren hergestellt ist. Vorzugsweise ist es ein Spritzguss-Kunststoffkörper.According to the invention, the housing of the return tank 30 is a one-piece housing, which is produced by injection molding. Preferably, it is an injection molded plastic body.

Der Rücklaufbehälter 30 von Fig. 1 kann auf verschiedene Arten realisiert werden. Einige davon werden im Folgenden mit Bezug auf die Figuren 2, 3 und 4 beschrieben.The return tank 30 of Fig. 1 can be realized in different ways. Some of these are below with reference to the Figures 2 . 3 and 4 described.

Die in den Figuren 2, 3 und 4 dargestellten Ausführungsformen von Laugenbehältern 30-2, 30-3 bzw. 30-4 haben je ein im Spritzgussverfahren hergestelltes einstückiges Gehäuse 32 aus Kunststoff, welches vorzugsweise eine kreiszylindrische Form mit vertikaler Zylinderachse hat, zumindest an deren unterem Endabschnitt.The in the Figures 2 . 3 and 4 illustrated embodiments of tubs 30-2, 30-3 and 30-4 each have a manufactured by injection molding one-piece housing 32 made of plastic, which preferably has a circular cylindrical shape with a vertical cylinder axis, at least at its lower end portion.

Bei den Figuren 2, 3 und 4 hat das Gehäuse 32 mindestens an seinem unteren Ende einen Innendurchmesser, der größer als der Außendurchmesser des am unteren Einlass 34 angeschlossenen Abpumpleitungsstückes 25 ist. Dieses untere Abpumpleitungsstück 25 ist nach oben in das Gehäuse 32 gerichtet.Both Figures 2 . 3 and 4 has the housing 32 at least at its lower end a Inner diameter, which is greater than the outer diameter of the connected at the lower inlet 34 Abpumpleitungsstückes 25. This lower Abpumpleitungsstück 25 is directed upward into the housing 32.

Ein im horizontalen Querschnitt gesehen ringförmiges Verbindungsstück 36 der Figuren 2 und 3 bzw. Verbindungsstück 36-4 von Fig. 4 bildet im Umfangsbereich zwischen dem unteren Abpumpleitungsstück 25 und dem Gehäuse 32 einen ringförmigen Gehäuseboden 38. Das Verbindungsstück 36 bzw. 36-4 grenzt an seinem radial inneren Umfangsbereich 40 wasserdicht an das untere Abpumpleitungsstück 25 an und an seinem radial äußeren Umfangsbereich 42 grenzt es wasserdicht an das Gehäuse 32 an. Seine beiden Umfangsbereiche sind jeweils axial gesichert gegen unbeabsichtigtes Trennen.A seen in horizontal cross-section annular connector 36 of the Figures 2 and 3 or connector 36-4 of Fig. 4 The connecting piece 36 or 36-4 watertight adjoins the lower Abpumpleitungsstück 25 at its radially inner peripheral portion 40 and at its radially outer peripheral portion 42, it adjoins watertight to the housing 32 at. Its two peripheral regions are each axially secured against unintentional separation.

Bei allen Ausführungsformen nach den Figuren 2, 3 und 4 ist vorzugsweise das untere Abpumpleitungsstück 25 durch ein Leitungsendstück 44 verlängert, das in das Gehäuse 32 mündet und die radiale innere Begrenzung eines als Grobkammerfalle wirkenden, vorzugsweise ringförmigen, Zwischenraumes 46 bildet, der radial außen von einer dem Leitungsendstück 44 mit Abstand radial gegenüberliegenden Umfangswand 48 des Gehäuses 32 (Fig. 4) begrenzt ist entsprechend den Figuren 2, 3 und 4, und entsprechend den Figuren 2 und 3 teilweise auch von dem Verbindungsstück 36 begrenzt sein kann. Gemäß einer nicht gezeigten Ausführungsform kann die radial äußere Umfangswand des Zwischenraumes 46 ausschließlich durch das Verbindungsstück 36 gebildet sein, wenn sein Gehäuseboden 38 entsprechend tief unter das Gehäuse 32 abgesetzt ist.In all embodiments according to the Figures 2 . 3 and 4 Preferably, the lower Abpumpleitungsstück 25 is extended by a line end 44 which opens into the housing 32 and the radial inner boundary of acting as a coarse chamber trap, preferably annular gap 46 which radially outward of a line end piece 44 at a distance radially opposite peripheral wall 48 of Housing 32 ( Fig. 4 ) is limited according to the Figures 2 . 3 and 4 , and according to the Figures 2 and 3 may also be partially limited by the connecting piece 36. According to an embodiment, not shown, the radially outer peripheral wall of the intermediate space 46 may be formed exclusively by the connecting piece 36, when its housing bottom 38 is deposited correspondingly deep below the housing 32.

Das Leitungsendstück 44 hat vorzugsweise mindestens eine Öffnung 50, die vorzugsweise durch einen oder mehrere Schlitze in seiner Längsrichtung gebildet sind, durch welche Lauge aus dem als Grobkammerfalle dienenden Zwischenraum 46 in das untere Abpumpleitungsstück 25 zurückfließen kann, wenn die Laugenpumpe 24 nach dem Abpumpen von Lauge abgeschaltet wird.The conduit end piece 44 preferably has at least one opening 50, which is preferably formed by one or more slots in its longitudinal direction, through which liquor from the chamber 46 serving as a coarse chamber trap can flow back into the lower Abpumpleitungsstück 25 when the drain pump 24 after pumping lye is switched off.

Die durch den Zwischenraum 46 gebildete Grobkammerfalle dient zum Sammeln von "groben" Teilen in der Lauge wie beispielsweise Knöpfe, Nadeln, Schrauben und ähnliche Teile, die mit der Wäsche in die Wäschetrommel 6 und von dieser in den Rücklaufbehälter gelangen können, wo sie von der im Zentrum des Gehäuses 32 nach oben strömenden Lauge radial nach außen gespült werden und in den Zwischenraum 46 (Grobkammerfalle) zurückfallen können.The coarse chamber trap formed by the space 46 is used to collect "coarse" parts in the liquor such as buttons, needles, screws and similar parts that can get into the laundry drum 6 and from this in the return tank with the laundry, where they from the in the center of the housing 32 upwardly flowing liquor are flushed radially outward and can fall back into the intermediate space 46 (coarse chamber trap).

Bei den Ausführungsformen nach den Figuren 2, 3 und 4 ist je eine Steckverbindung zwischen dem Verbindungsstück 36 bzw. 36-4 und dem Gehäuse 32 vorgesehen.In the embodiments of the Figures 2 . 3 and 4 is ever a connector between the connector 36 and 36-4 and the housing 32 is provided.

Bei der Ausführungsform nach den Figuren 2 und 3 ist die Steckverbindung dadurch gebildet, dass das Verbindungsstück 36 an seinem oberen Endabschnitt 52 als Muffe ausgebildet ist, die auf (oder in) den unteren Endabschnitt des Gehäuses 32 aufgesteckt (oder eingesteckt) ist und einen größeren Durchmesser hat als der rohrartige untere Endabschnitt 54 des Verbindungsstückes 36. Der obere, als Muffe ausgebildete Endabschnitt 52 des Verbindungsstückes 36 ist dem Durchmesser des Gehäuses 32 angepasst. Gemäß Fig. 2 kann der obere Endabschnitt 52 des Verbindungsstückes 36 an den unteren Endabschnitten des Gehäuses 32 zur Axialfixierung angeschweißt oder angeklebt sein. Gemäß Fig. 3 kann der obere Endabschnitt 52 des Verbindungsstückes 36 mit einer Rastennase 56 versehen sein, die in eine Vertiefung 58 am Außenumfang des Gehäuses 32 einrastet und dadurch ein unbeabsichtigtes Trennen des Verbindungsstückes 36 vom Gehäuse 32 verhindert. Zwischen beiden Elementen kann eine Dichtung 60 eingesetzt sein. Die Rastennase 56 und die Vertiefung 58 können vertauscht sein.In the embodiment of the Figures 2 and 3 the connector is formed in that the connecting piece 36 is formed at its upper end portion 52 as a sleeve which is plugged (or inserted) on (or in) the lower end portion of the housing 32 and has a larger diameter than the tubular lower end portion 54 of Connecting piece 36. The upper, designed as a sleeve end portion 52 of the connecting piece 36 is adapted to the diameter of the housing 32. According to Fig. 2 For example, the upper end portion 52 of the connector 36 may be welded or adhered to the lower end portions of the axial fixation case 32. According to Fig. 3 For example, the upper end portion 52 of the connector 36 may be provided with a detent lug 56 which engages a recess 58 on the outer periphery of the housing 32, thereby preventing unintentional disconnection of the connector 36 from the housing 32. Between both elements, a seal 60 may be used. The detent nose 56 and the recess 58 may be reversed.

Gemäß den Figuren 2, 3 und 4 kann das Leitungsendstück 44 zusammen mit dem Abpumpleitungsstückes 25 ein einstückiges Teil sein, oder mit diesem lösbar verbunden oder vorzugsweise durch Anspritzen oder Anvulkanisieren oder gemeinsames Extrudieren untrennbar verbunden sein. Gemäß anderer Ausführungsform kann das Leitungsendstück 44 zusammen mit dem Gehäuse 32 und dem Gehäuseboden 38 ein einstückiges Teil sein.According to the Figures 2 . 3 and 4 For example, the conduit end 44 together with the pump-down conduit 25 may be an integral part, or may be detachably connected thereto, or preferably inseparable from injection or scorching or coextrusion. According to another embodiment, the conduit end 44 together with the housing 32 and the housing bottom 38 may be an integral part.

Bei der Ausführungsform nach Fig. 4 ist das Verbindungsstück 36-4 ein ringförmiger Dichtungskörper, der zwischen das Leitungsendstück 44 des unteren Abpumpleitungsstückes 25 und das es außen umgebende Gehäuse 32 eingesetzt ist und an beiden wasserdicht anliegt. Der Dichtungskörper 36-4 ist vorzugsweise in eine Außenumfangsnut 60 des Leitungsendstückes 44 eingesetzt und durch die Nutwände axial gesichert, so dass er beim Einstecken des Leitungsendstückes 44 in das Gehäuse 32 an nach innen ragenden Rastenvorsprüngen 62 des Gehäuses 32 axial vorbeischnappen kann und dann von diesen Rastenvorsprüngen 62 gehindert wird, aus dem Gehäuse 32 herauszurutschen.In the embodiment according to Fig. 4 the connecting piece 36-4 is an annular sealing body which is inserted between the line end piece 44 of the lower Abpumpleitungsstückes 25 and the outer surrounding housing 32 and bears watertight on both. The seal body 36-4 is preferably inserted into an outer circumferential groove 60 of the conduit end piece 44 and axially secured by the groove walls so that it can axially snap past the inwardly projecting detent projections 62 of the housing 32 upon insertion of the conduit end piece 44 into the housing 32 and then from there Latch projections 62 is prevented from slipping out of the housing 32.

Im Gehäuse 32 ist mit Höhenabstand über dem unteren Einlass 34 ein Auslass 64, vorzugsweise in Form einer sich quer zur Vertikalrichtung erstreckenden Buchse, gebildet, an welcher das obere Abpumpleitungsstück 26 angeschlossen ist, vorzugsweise angesteckt ist, mit oder ohne eine Rastverbindung. Diese Verbindung ist wasserdicht, beispielsweise durch Dichtungsringe 66. Der obere Auslass 64 befindet sich vorzugsweise am oder nahe am oberen Ende des Gehäuses 32. Gemäß einer anderen Ausführungsform kann das Gehäuse 32 auch nach oben über den oberen Auslass hinaus verlängert sein.In the housing 32 is at height above the lower inlet 34 an outlet 64, preferably in the form of a sleeve extending transversely to the vertical direction, to which the upper pumping line piece 26 is connected, preferably being connected, with or without a latching connection. This connection is watertight, for example, by sealing rings 66. The upper outlet 64 is preferably at or near the top of the housing 32. According to another embodiment, the housing 32 may be extended upwardly beyond the upper outlet.

Vorzugsweise ist im Gehäuse 32 eine Zusatzöffnung 68 gebildet, z.B. als Entlüftungsöffnung oder für den Anschluss eines Drucksensors oder eines Flüssigkeitssensors zur Detektion von Lauge oder Wasser im Gehäuse 32.Preferably, an additional opening 68 is formed in the housing 32, e.g. as a vent or for the connection of a pressure sensor or a liquid sensor for the detection of alkali or water in the housing 32nd

Damit das Gehäuse 32 im Spritzgussverfahren einstückig hergestellt werden kann, muss es an einem Ende eine Öffnung haben, aus welcher am Ende des Spritzgussverfahrens der Werkzeugkem herausgezogen werden kann. Diese Öffnung kann am unteren oder am oberen Ende des Gehäuses 32 sein. Bei den Ausführungsformen nach den Figuren 2, 3 und 4 bildet diese Öffnung den unteren Einlass 34. Gemäß nicht gezeigten Ausführungsformen ist es deshalb auch möglich, die zum Herausziehen des Spritzgusskernes erforderliche Öffnung am oberen Ende des Gehäuses 32 vorzusehen. In diesem Falle besteht eine Ausführungsform der Erfindung darin, dass der Gehäuseboden 38 und auch das Leitungsendstück 44 des unteren Abpumpleitungsstückes 35 als einstückiges Teil des Gehäuses 32 mittels eines Spritzgießverfahrens hergestellt werden.In order for the housing 32 to be made in one piece by injection molding, it must have an opening at one end, from which the tool core can be pulled out at the end of the injection molding process. This opening may be at the lower or upper end of the housing 32. In the embodiments of the Figures 2 . 3 and 4 This opening therefore forms the lower inlet 34. According to embodiments not shown, it is therefore also possible to provide the opening required for pulling out the injection-molding core at the upper end of the housing 32. In this case, an embodiment of the invention is that the housing bottom 38 and also the line end 44 of the lower Abpumpleitungsstückes 35 are produced as an integral part of the housing 32 by means of an injection molding process.

Eine weitere Ausführungsform kann darin bestehen, das obere Abpumpleitungsstück 26 zusammen mit dem Gehäuse 32 im Spritzgussverfahren als einstückiges Teil herzustellen.A further embodiment may be to make the upper Abpumpleitungsstück 26 together with the housing 32 by injection molding as a one-piece part.

Claims (7)

  1. Solution discharge pump train for a washing machine, which includes a return flow container (30; 30-2; 30-3; 30-4), the volume of which is so dimensioned that when the solution pump is switched off a predetermined solution quantity can flow back through the solution pump under the laundry drum of the washing machine due to gravitational force, wherein the return flow container is provided at the bottom with an inlet (34) and at the top with an outlet (64) for the solution to be pumped away, characterised in that the return flow container comprises a unitary housing (32), which is produced in an injection-moulding process and which has at least at its lower end section a circularly cylindrical shape and an internal diameter larger than the outer diameter of a lower discharge pump duct length (25), which is provided at the inlet (34) and which is oriented from down to up in the housing, that a connecting member (36; 36-4), which is annular in horizontal cross-section and which forms an annular housing base (38) in the circumferential region between the lower discharge pump duct length and the housing (32), is provided, wherein the connecting member is sealed at its radially inner circumferential region relative to the lower discharge pump duct length (25) and at its radially outer circumferential region relative to the housing (32) and is axially secured at each against unintended separation.
  2. Solution discharge pump train according to claim 1, characterised in that the housing (32) consists of plastics material.
  3. Solution discharge pump train according to claim 1 or 2, characterised in that a duct end member (44) is provided, which is a part or a prolongation of the lower discharge pump duct length (25), projects from down to up beyond the connecting member (36; 36-4) into the housing (32) and opens in the housing (32), and the radially inner boundary forms an intermediate space (46), which acts as a coarse chamber trap and which is formed radially outwardly and at the bottom by a circumferential wall of the housing (32) and/or by the connecting member (36; 36-4).
  4. Solution discharge pump train according to claim 3, characterised in that the duct end member (44) has at least one lateral opening (50) in its duct wall for return flow of solution from the intermediate space (46) to the duct end member.
  5. Solution discharge pump train according to claim 3 or 4, characterised in that the connecting member (36; 36-4) is connected by a plug connection (56, 58; 62) with the housing (32).
  6. Solution discharge pump train according to any one of claims 3 to 5, characterised in that the connecting member (36) is a sleeve which has at the bottom a smaller diameter, which is matched to the discharge pump duct length (25), than at the top, wherein the larger outer diameter is matched to the housing (32).
  7. Solution discharge pump train according to any one of claims 3 to 5, characterised in that the connecting member (36-4) is an annular sealing ring body which is inserted between the housing (32) on the one hand and the duct end member (44) on the other hand and adjoins each in water-tight manner.
EP01124895A 2000-11-24 2001-10-18 Device for pumping out washing water in a washing machine Expired - Lifetime EP1209275B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10058413 2000-11-24
DE10058413A DE10058413B4 (en) 2000-11-24 2000-11-24 Laugenabpumpstrang in a washing machine

Publications (3)

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EP1209275A2 EP1209275A2 (en) 2002-05-29
EP1209275A3 EP1209275A3 (en) 2004-01-21
EP1209275B1 true EP1209275B1 (en) 2008-08-13

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EP01124895A Expired - Lifetime EP1209275B1 (en) 2000-11-24 2001-10-18 Device for pumping out washing water in a washing machine

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EP (1) EP1209275B1 (en)
AT (1) ATE404723T1 (en)
DE (2) DE10058413B4 (en)
ES (1) ES2310534T3 (en)

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DE102008054708B4 (en) 2008-12-16 2012-03-08 BSH Bosch und Siemens Hausgeräte GmbH Receiving device for receiving a plurality of washing pieces
DE102009046782A1 (en) 2008-12-16 2010-06-17 BSH Bosch und Siemens Hausgeräte GmbH Water-bearing household appliance for use as e.g. washing machine, to wash and/dry laundry, has pump inhibiting conveying of liquid by rotating in specific rotation direction, in one of operation modes of pump
DE102009046856A1 (en) 2008-12-16 2010-06-17 BSH Bosch und Siemens Hausgeräte GmbH Water-bearing household appliance e.g. washing machine, for washing and/or drying laundry, has pump unit arranged in discharge and/or return line and provided with rotary piston machine that is formed as gear pump
DE102008054820B4 (en) 2008-12-17 2014-05-22 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance with a flushing device with a warm and / or dry air unit
DE102008054821B3 (en) 2008-12-17 2010-03-18 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance with venturi pump on the water supply line
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DE202008016886U1 (en) 2008-12-19 2009-03-05 BSH Bosch und Siemens Hausgeräte GmbH Laundry treatment device with a cuff with filler neck
DE102009028479B4 (en) 2009-08-12 2014-12-11 BSH Bosch und Siemens Hausgeräte GmbH Water-carrying household appliance with a water supply pipe
DE102009028481B3 (en) 2009-08-12 2011-06-16 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance with a switching valve
DE102009028484B3 (en) 2009-08-12 2011-01-05 BSH Bosch und Siemens Hausgeräte GmbH Water-bearing household appliance with a pump
DE102009029446B4 (en) 2009-09-14 2022-03-24 BSH Hausgeräte GmbH Water-bearing household appliance
DE102010029890A1 (en) 2010-06-09 2011-12-15 BSH Bosch und Siemens Hausgeräte GmbH Water-bearing household appliance with a turbidity sensor
DE102010044189A1 (en) 2010-11-19 2012-05-24 BSH Bosch und Siemens Hausgeräte GmbH Aquiferous domestic appliance e.g. laundry treatment apparatus for washing and/or drying laundry, has controller to output procedural instructions addressed to user through output device
DE102011076211B4 (en) 2011-05-20 2019-03-14 BSH Hausgeräte GmbH Water-conducting household appliance with closable hose piece
DE102011083295B3 (en) * 2011-09-23 2013-02-07 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance with a pulsator
DE102011089625A1 (en) * 2011-12-22 2013-06-27 BSH Bosch und Siemens Hausgeräte GmbH Laugenabpumpstrang for a household appliance for the care of laundry and corresponding household appliance with a Laugenabpumpstrang
DE102012024761B4 (en) 2012-01-13 2020-03-26 BSH Hausgeräte GmbH Water-bearing household appliance with a suction lifter in the drain
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DE102012224014B4 (en) 2012-12-20 2021-09-23 BSH Hausgeräte GmbH Water-bearing household appliance with a ventilation line for the pumping line

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Also Published As

Publication number Publication date
EP1209275A2 (en) 2002-05-29
DE10058413A1 (en) 2002-06-13
EP1209275A3 (en) 2004-01-21
ATE404723T1 (en) 2008-08-15
DE50114211D1 (en) 2008-09-25
ES2310534T3 (en) 2009-01-16
DE10058413B4 (en) 2006-07-27

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