EP1209275A2 - 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
EP1209275A2
EP1209275A2 EP01124895A EP01124895A EP1209275A2 EP 1209275 A2 EP1209275 A2 EP 1209275A2 EP 01124895 A EP01124895 A EP 01124895A EP 01124895 A EP01124895 A EP 01124895A EP 1209275 A2 EP1209275 A2 EP 1209275A2
Authority
EP
European Patent Office
Prior art keywords
housing
piece
line
pump line
connecting piece
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.)
Granted
Application number
EP01124895A
Other languages
German (de)
French (fr)
Other versions
EP1209275A3 (en
EP1209275B1 (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 drain pump line in a washing machine according to the Preamble of claim 1.
  • a washing machine with a drain pump line of this type is from the DE 35 06 761 C2 known.
  • the drain pump line contains a return tank, whose volume is dimensioned so that a predetermined one when the drain pump is switched off Lye amount through the drain pump under the laundry drum Gravity can flow back, with the return tank below with an inlet and is provided at the top with an outlet for the liquor to be pumped out.
  • the container 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 are fixed relative to each other at their parting plane and welded together Need to become. Then there is a test for 100% tightness of the return tank is required.
  • Plastic corrugated pipe hose as a pump hose connected to a sleeve via a seal and a hose clamp to prevent accidental disconnection from the Return tank secured.
  • the object of the invention is to design the return tank in such a way that that it is cheaper to manufacture, especially in such a way that the said Welding and / or the leak test mentioned are no longer required.
  • the return tank has a one-piece housing, which is manufactured by injection molding.
  • the housing is preferably made of plastic.
  • This return container which is produced as an injection molded part, preferably has a positive fit connected watertight with a plastic pumping hose.
  • the flexible pump hose can be, for example, a so-called corrugated tube.
  • Its form-fitting Connection to the return tank is preferably made by a plug connection, preferably by a plug-snap connection, which is detachable or non-detachable can be. Due to the positive (interlocking) connection between Pump hose and return tank become hose clamps and similar tensioning elements avoided.
  • One possibility is to use a flexible pumping hose shaped in this way, e.g.
  • a sleeve made of rubber or plastic is pushed on can be whose inner diameter seals against the pumping hose and whose outer diameter seals from the inside against the return tank.
  • a sleeve can end on the one hand the pumping hose can be injection molded or vulcanized and on the other hand in the Inner diameter or preferably on the outer diameter of the return tank be arranged sealingly.
  • a Hose clamp can also be used.
  • a laundry drum 6 is rotatably mounted about a horizontal axis.
  • the tub 2 can via a line 8, a solenoid valve 10 and a detergent dispenser 12 water can be supplied.
  • the machine housing 14 and the tallest in the tub 10 achievable water levels 16 are shown schematically by broken lines shown.
  • a drain line 20 is connected to the bottom 18 of the tub 2, via a lint separator 22 to the suction side of a drain pump 24 leads.
  • a drain hose 25, 26 is connected to the pressure side of the drain pump 24, that of a lower pump line piece 25 and an upper pump line piece 26, which are interconnected by a return tank 30, wherein the two pump line pieces are bendable and preferably so-called corrugated tube hoses are.
  • the upper pump line piece 26 can be connected to a drain or hung in a water drainage basin 28.
  • the volume of the return tank 30 is approximately so large that after pumping of lye when the lye pump 24 is switched off, which comes out of the pumping hose 25, 26 and the return tank 30 through the drain pump 24 back flowing alkali comes to a level which is approximately at the level of the floor area 18 of the tub 2. This ensures that with subsequent addition of detergent from the detergent dispenser 12 this detergent is not in the drain line 21 at the bottom 18 of the tub 2 disappears, but from the water to be newly added to the water pipe 8 into the laundry drum 6 is rinsed.
  • the housing of the return tank 30 is a one-piece housing, which is made by injection molding. It is preferably an injection molded plastic body.
  • the return tank 30 of FIG. 1 can be implemented in various ways. Some of which are described below with reference to FIGS. 2, 3 and 4.
  • tubs shown in Figures 2, 3 and 4 30-2, 30-3 and 30-4 each have a one-piece injection molding process Housing 32 made of plastic, which is preferably a circular cylindrical shape with a vertical Has cylinder axis, at least at its lower end section.
  • the housing 32 has one at least at its lower end Inner diameter that is larger than the outer diameter of the one at the lower inlet 34 connected pump line piece 25 is. This lower pump line piece 25 is directed upwards into the housing 32.
  • An annular connecting piece 36 of FIGS. 2 seen in horizontal cross section and 3 or connecting piece 36-4 of Fig. 4 forms in the peripheral region between the lower pump line piece 25 and the housing 32 an annular housing base 38.
  • the connecting piece 36 or 36-4 borders on its radially inner peripheral region 40 waterproof to the lower pump line piece 25 and at its radially outer
  • the circumferential area 42 is watertightly adjacent to the housing 32. His two Circumferential areas are axially secured against unintentional separation.
  • the lower one is preferably Pump line piece 25 extended by a line end piece 44, which in the housing 32 opens and the radial inner boundary of a preferably annular, space 46 which forms radially outside of one Line end piece 44 with a spacing radially opposite circumferential wall 48 of the housing 32 (Fig. 4) is limited according to Figures 2, 3 and 4, and accordingly Figures 2 and 3 may also be limited in part by the connector 36.
  • the radially outer peripheral wall of the Intermediate space 46 can be formed exclusively by the connecting piece 36 if its housing base 38 is set correspondingly deep below the housing 32.
  • the line end piece 44 preferably has at least one opening 50, which is preferably are formed by one or more slots in its longitudinal direction, through which Lye from the intermediate space 46 serving as a coarse chamber trap into the lower section of the pump-off line 25 can flow back when the drain pump 24 after pumping is switched off by lye.
  • the coarse chamber trap formed by the space 46 is used to collect "Coarse" parts in the base such as buttons, needles, screws and the like Parts with the laundry in the laundry drum 6 and from this into the return container can get where they from the flowing in the center of the housing 32 upwards
  • the lye is flushed radially outwards and into the space 46 (coarse chamber trap) can fall behind.
  • the plug connection is formed by that the connector 36 is formed at its upper end portion 52 as a sleeve which is attached to (or in) the lower end portion of the housing 32 (or inserted) and has a larger diameter than the tubular lower end portion 54 of the connecting piece 36.
  • the upper, end section designed as a sleeve 52 of the connecting piece 36 is adapted to the diameter of the housing 32. 2, the upper end portion 52 of the connector 36 to the lower End portions of the housing 32 welded or glued for axial fixation his.
  • the upper end portion 52 of the connector 36 with a Detent nose 56 may be provided, which in a recess 58 on the outer circumference of the housing 32 engages and thereby an unintentional disconnection of the connecting piece 36 prevented by the housing 32.
  • a seal 60 can be inserted between the two elements his.
  • the latching lug 56 and the depression 58 can be interchanged.
  • the line end piece 44 can be used together with the pump line piece 25 be a one-piece part, or releasably connected to it or preferably by injection or vulcanization or extrusion together be inseparable. According to another embodiment, the line end piece 44 together with the housing 32 and the housing base 38 in one piece Be part of.
  • the connecting piece 36-4 is an annular sealing body, the between the line end piece 44 of the lower pump line piece 25 and the housing 32 surrounding it is inserted and waterproof on both is applied.
  • the sealing body 36-4 is preferably in an outer circumferential groove 60 of the line end piece 44 used and axially secured by the groove walls, so that it when Inserting the line end piece 44 into the housing 32 on inward protruding projections 62 of the housing 32 can snap past axially and then by these Latch projections 62 is prevented from slipping out of the housing 32.
  • An outlet 64 is preferably located in the housing 32 at a height distance above the lower inlet 34 in the form of a bushing extending transversely to the vertical direction, to which the upper pump line piece 26 is connected, preferably connected is, with or without a locking connection.
  • This connection is waterproof, for example through sealing rings 66.
  • the upper outlet 64 is preferably located at or near the top of housing 32. In another embodiment The housing 32 can also be extended upward beyond the upper outlet his.
  • An additional opening 68 is preferably formed in the housing 32, e.g. as a vent or for the connection of a pressure sensor or a liquid sensor for detection of lye or water in the housing 32.
  • the housing 32 can be produced in one piece using the injection molding process it has an opening at one end, from which at the end of the injection molding process the tool core can be pulled out.
  • This opening can be at the bottom or be at the top of the housing 32. In the embodiments according to FIGS. 2, 3 and 4, this opening forms the lower inlet 34. According to embodiments not shown it is therefore also possible to pull out the injection molding core provide required opening at the upper end of the housing 32.
  • one embodiment of the invention is that the housing base 38 and also the line end piece 44 of the lower pump line piece 35 as an integral part of the housing 32 are produced by means of an injection molding process.
  • a further embodiment can consist in the upper pump-out line piece 26 to manufacture together with the housing 32 as an integral part by injection molding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Lubricants (AREA)
  • Detergent Compositions (AREA)
  • Slot Machines And Peripheral Devices (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 in einer Waschmaschine gemäß dem Oberbegriff von Anspruch 1.The invention relates to a drain pump line in a washing machine according to the Preamble of claim 1.

Eine Waschmaschine mit einem Laugenabpumpstrang dieser Art ist aus der DE 35 06 761 C2 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 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 drain pump line of this type is from the DE 35 06 761 C2 known. The drain pump line contains a return tank, whose volume is dimensioned so that a predetermined one when the drain pump is switched off Lye amount through the drain pump under the laundry drum Gravity can flow back, with the return tank below with an inlet and is provided at the top with an outlet for the liquor to be pumped out. The container 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 are fixed relative to each other at their parting plane and welded together Need to become. Then there is a test for 100% tightness of the return tank is required. In practice there is a return tank Plastic corrugated pipe hose as a pump hose connected to a sleeve via a seal and a hose clamp to prevent accidental disconnection from the Return tank secured.

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.The object of the invention is to design the return tank in such a way that that it is cheaper to manufacture, especially in such a way that the said Welding and / or the leak test mentioned are no longer required.

Diese Aufgabe wird gemäß der Erfindung durch die Merkmale von Anspruch 1 gelöst.This object is achieved according to the invention by the features of claim 1.

Gemäß der Erfindung weist der Rücklaufbehälter ein einstückiges Gehäuse auf, welches im Spritzgussverfahren hergestellt ist.According to the invention, the return tank has a one-piece housing, which is manufactured by injection molding.

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 container, which is produced as an injection molded part, preferably has a positive fit connected watertight with a plastic pumping hose. The flexible pump hose can be, for example, a so-called corrugated tube. Its form-fitting Connection to the return tank is preferably made by a plug connection, preferably by a plug-snap connection, which is detachable or non-detachable can be. Due to the positive (interlocking) connection between Pump hose and return tank become hose clamps and similar tensioning elements avoided.

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 a flexible pumping hose shaped in this way, e.g. To use corrugated tube hose that a sleeve made of rubber or plastic is pushed on can be whose inner diameter seals against the pumping hose and whose outer diameter seals from the inside against the return tank.

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 end on the one hand the pumping hose can be injection molded or vulcanized and on the other hand in the Inner diameter or preferably on the outer diameter of the return tank be arranged sealingly. To ensure the sealing effect, a Hose clamp can also 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 is described below with reference to the drawings using preferred embodiments as examples. Show in the drawings
Fig. 1
schematically in vertical section a washing machine with a drain pump line according to the invention,
Fig. 2
2 shows a vertical section of a special embodiment of a drain pumping container from FIG. 1,
Fig. 3
2 shows a vertical section of a further embodiment of the drain pump container from FIG. 1,
Fig. 4
2 shows a vertical section of yet another embodiment of the suds pumping container from 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 the washing machine 4 shown in FIG. 1 a laundry drum 6 is rotatably mounted about a horizontal axis. The tub 2 can via a line 8, a solenoid valve 10 and a detergent dispenser 12 water can be supplied. The machine housing 14 and the tallest in the tub 10 achievable water levels 16 are shown schematically by broken lines shown. A drain line 20 is connected to the bottom 18 of the tub 2, via a lint separator 22 to the suction side of a drain pump 24 leads. A drain hose 25, 26 is connected to the pressure side of the drain pump 24, that of a lower pump line piece 25 and an upper pump line piece 26, which are interconnected by a return tank 30, wherein the two pump line pieces are bendable and preferably so-called corrugated tube hoses are. The upper pump line piece 26 can be connected to a drain or hung in a water 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 approximately so large that after pumping of lye when the lye pump 24 is switched off, which comes out of the pumping hose 25, 26 and the return tank 30 through the drain pump 24 back flowing alkali comes to a level which is approximately at the level of the floor area 18 of the tub 2. This ensures that with subsequent addition of detergent from the detergent dispenser 12 this detergent is not in the drain line 21 at the bottom 18 of the tub 2 disappears, but from the water to be newly added to the water pipe 8 into the laundry drum 6 is rinsed.

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 made by injection molding. It is preferably 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 implemented in various ways. Some of which are described below with reference to FIGS. 2, 3 and 4.

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 embodiments of tubs shown in Figures 2, 3 and 4 30-2, 30-3 and 30-4 each have a one-piece injection molding process Housing 32 made of plastic, which is preferably a circular cylindrical shape with a vertical Has cylinder axis, at least at its lower end section.

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.In Figures 2, 3 and 4, the housing 32 has one at least at its lower end Inner diameter that is larger than the outer diameter of the one at the lower inlet 34 connected pump line piece 25 is. This lower pump line piece 25 is directed upwards 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.An annular connecting piece 36 of FIGS. 2 seen in horizontal cross section and 3 or connecting piece 36-4 of Fig. 4 forms in the peripheral region between the lower pump line piece 25 and the housing 32 an annular housing base 38. The connecting piece 36 or 36-4 borders on its radially inner peripheral region 40 waterproof to the lower pump line piece 25 and at its radially outer The circumferential area 42 is watertightly adjacent to the housing 32. His two Circumferential areas are 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 the embodiments according to FIGS. 2, 3 and 4, the lower one is preferably Pump line piece 25 extended by a line end piece 44, which in the housing 32 opens and the radial inner boundary of a preferably annular, space 46 which forms radially outside of one Line end piece 44 with a spacing radially opposite circumferential wall 48 of the housing 32 (Fig. 4) is limited according to Figures 2, 3 and 4, and accordingly Figures 2 and 3 may also be limited in part by the connector 36. According to an embodiment not shown, the radially outer peripheral wall of the Intermediate space 46 can be formed exclusively by the connecting piece 36 if its housing base 38 is set 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 line end piece 44 preferably has at least one opening 50, which is preferably are formed by one or more slots in its longitudinal direction, through which Lye from the intermediate space 46 serving as a coarse chamber trap into the lower section of the pump-off line 25 can flow back when the drain pump 24 after pumping is switched off by lye.

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 base such as buttons, needles, screws and the like Parts with the laundry in the laundry drum 6 and from this into the return container can get where they from the flowing in the center of the housing 32 upwards The lye is flushed radially outwards and into the space 46 (coarse chamber trap) can fall behind.

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 according to FIGS. 2, 3 and 4 there is a plug connection between each the connector 36 or 36-4 and the housing 32 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 according to FIGS. 2 and 3, the plug connection is formed by that the connector 36 is formed at its upper end portion 52 as a sleeve which is attached to (or in) the lower end portion of the housing 32 (or inserted) and has a larger diameter than the tubular lower end portion 54 of the connecting piece 36. The upper, end section designed as a sleeve 52 of the connecting piece 36 is adapted to the diameter of the housing 32. 2, the upper end portion 52 of the connector 36 to the lower End portions of the housing 32 welded or glued for axial fixation his. 3, the upper end portion 52 of the connector 36 with a Detent nose 56 may be provided, which in a recess 58 on the outer circumference of the housing 32 engages and thereby an unintentional disconnection of the connecting piece 36 prevented by the housing 32. A seal 60 can be inserted between the two elements his. The latching lug 56 and the depression 58 can be interchanged.

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 FIGS. 2, 3 and 4, the line end piece 44 can be used together with the pump line piece 25 be a one-piece part, or releasably connected to it or preferably by injection or vulcanization or extrusion together be inseparable. According to another embodiment, the line end piece 44 together with the housing 32 and the housing base 38 in one piece Be part of.

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.4, the connecting piece 36-4 is an annular sealing body, the between the line end piece 44 of the lower pump line piece 25 and the housing 32 surrounding it is inserted and waterproof on both is applied. The sealing body 36-4 is preferably in an outer circumferential groove 60 of the line end piece 44 used and axially secured by the groove walls, so that it when Inserting the line end piece 44 into the housing 32 on inward protruding projections 62 of the housing 32 can snap past axially and then by these 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.An outlet 64 is preferably located in the housing 32 at a height distance above the lower inlet 34 in the form of a bushing extending transversely to the vertical direction, to which the upper pump line piece 26 is connected, preferably connected is, with or without a locking connection. This connection is waterproof, for example through sealing rings 66. The upper outlet 64 is preferably located at or near the top of housing 32. In another embodiment The housing 32 can also be extended upward beyond the upper outlet his.

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.An additional opening 68 is preferably formed in the housing 32, e.g. as a vent or for the connection of a pressure sensor or a liquid sensor for detection of lye or water in the housing 32.

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.So that the housing 32 can be produced in one piece using the injection molding process it has an opening at one end, from which at the end of the injection molding process the tool core can be pulled out. This opening can be at the bottom or be at the top of the housing 32. In the embodiments according to FIGS. 2, 3 and 4, this opening forms the lower inlet 34. According to embodiments not shown it is therefore also possible to pull out the injection molding core provide required opening at the upper end of the housing 32. In this case one embodiment of the invention is that the housing base 38 and also the line end piece 44 of the lower pump line piece 35 as an integral part of the housing 32 are produced 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 can consist in the upper pump-out line piece 26 to manufacture together with the housing 32 as an integral part by injection molding.

Claims (8)

Laugenabpumpstrang in einer Waschmaschine, welcher einen Rücklaufbehälter (30; 30-2; 30-3; 30-4) enthält, 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 (34) und oben mit einem Auslass (64) für die abzupumpende Lauge versehen ist, dadurch gekennzeichnet, dass der Rücklaufbehälter ein einstückiges Gehäuse (32) aufweist, welches im Spritzgussverfahren hergestellt ist.Alkaline pumping-off line in a washing machine, which contains a return tank (30; 30-2; 30-3; 30-4), the volume of which is dimensioned such that when the alkali pump is switched off, a predetermined amount of alkali can flow back through the alkali pump under the laundry drum by gravity, wherein the return tank is provided at the bottom with an inlet (34) and at the top with an outlet (64) for the liquor to be pumped out, characterized in that the return tank has a one-piece housing (32) which is produced by injection molding. Laugenabpumpstrang nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse (32) aus Kunststoff besteht.Drain pump line according to claim 1, characterized in that the housing (32) consists of plastic. Laugenabpumpstrang nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Gehäuse (32) mindestens an seinem unteren Ende einen Innendurchmesser hat, der größer als der Außendurchmesser eines am Einlass (34) vorgesehenen unteren Abpumpleitungsstückes (25) ist, welches von unten nach oben in das Gehäuse gerichtet ist, dass ein im horizontalen Querschnitt ringförmiges Verbindungsstück (36; 36-4) vorgesehen ist, welches im Umfangsbereich zwischen dem unteren Abpumpleitungsstück und dem Gehäuse (32) einen ringförmigen Gehäuseboden (38) bildet, wobei das Verbindungsstück an seinem radial inneren Umfangsbereich gegen das untere Abpumpleitungsstück (25) und an seinem radial äußeren Umfangsbereich gegen das Gehäuse (32) gedichtet ist und je axial gesichert ist gegen unbeabsichtigtes Trennen.Drain pump line according to claim 1 or 2, characterized in that the housing (32) has at least at its lower end an inner diameter which is larger than the outer diameter of a lower pump line piece (25) provided at the inlet (34), which extends from bottom to top in the housing is directed such that a connecting piece (36; 36-4) which is annular in horizontal cross section is provided and which forms an annular housing base (38) in the circumferential region between the lower pump-out line piece and the housing (32), the connecting piece on its radially inner one Circumferential area is sealed against the lower pump line piece (25) and at its radially outer peripheral area against the housing (32) and each axially secured against unintentional separation. Laugenabpumpstrang nach Anspruch 3, dadurch gekennzeichnet, dass ein Leitungsendstück (44) vorgesehen ist, welches ein Teil oder eine Verlängerung des unteren Abpumpleitungsstückes (25) ist, von unten nach oben über das Verbindungsstück (36; 36-4) hinaus in das Gehäuse (32) hinein ragt und im Gehäuse (32) mündet und die radial innere Begrenzung eines als Grobkammerfalle wirkenden Zwischenraumes (46) bildet, der radial außen und unten von einer Umfangswand des Gehäuses (32) und/oder von dem Verbindungsstück (36; 36-4) gebildet ist. Drain pump line according to claim 3, characterized in that a line end piece (44) is provided, which is part or an extension of the lower pump line piece (25), from bottom to top beyond the connecting piece (36; 36-4) into the housing ( 32) protrudes into it and opens into the housing (32) and forms the radially inner boundary of an intermediate space (46) which acts as a coarse chamber trap and which extends radially outside and below from a peripheral wall of the housing (32) and / or from the connecting piece (36; 36- 4) is formed. Laugenabpumpstrang nach Anspruch 4, dadurch gekennzeichnet, dass das Leitungsendstück (44) mindestens eine seitliche Öffnung (50) in seiner Leitungswand zum Zurückfließen von Lauge aus dem Zwischenraum (46) in das Leitungsendstück hat.Alkaline drain line according to claim 4, characterized in that the line end piece (44) has at least one lateral opening (50) in its line wall for the backflow of lye from the intermediate space (46) into the line end piece. Laugenabpumpstrang nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass das Verbindungsstück (36; 36-4) durch eine Steckverbindung (56, 58; 62) mit dem Gehäuse (32) verbunden ist.Drain pump line according to one of claims 3 to 5, characterized in that the connecting piece (36; 36-4) is connected to the housing (32) by a plug connection (56, 58; 62). Laugenabpumpstrang nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass das Verbindungsstück (36) eine Muffe ist, die unten einen dem Abpumpleitungsstück (25) angepassten kleineren Durchmesser als oben hat, wobei der größere obere Durchmesser dem Gehäuse (32) angepasst ist.Drain pump line according to one of Claims 3 to 6, characterized in that the connecting piece (36) is a sleeve which has a smaller diameter at the bottom than the top at the pump line piece (25), the larger upper diameter being matched to the housing (32). Laugenabpumpstrang nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Verbindungsstück (36-4) ein ringförmiger Dichtungsringkörper ist, der zwischen das Gehäuse (32) einerseits und das Leitungsendstück (44) andererseits eingesetzt ist und an beide jeweils wasserdicht angrenzt.Drain pump line according to one of claims 4 to 6, characterized in that the connecting piece (36-4) is an annular sealing ring body which is inserted between the housing (32) on the one hand and the line end piece (44) on the other hand and is watertightly adjacent to both.
EP01124895A 2000-11-24 2001-10-18 Device for pumping out washing water in a washing machine Expired - Lifetime EP1209275B1 (en)

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DE10058413A DE10058413B4 (en) 2000-11-24 2000-11-24 Laugenabpumpstrang in a washing machine
DE10058413 2000-11-24

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EP1209275A3 EP1209275A3 (en) 2004-01-21
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AT (1) ATE404723T1 (en)
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Publication number Publication date
EP1209275A3 (en) 2004-01-21
DE10058413A1 (en) 2002-06-13
ATE404723T1 (en) 2008-08-15
EP1209275B1 (en) 2008-08-13
DE10058413B4 (en) 2006-07-27
DE50114211D1 (en) 2008-09-25
ES2310534T3 (en) 2009-01-16

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