EP2287384B1 - Water-guiding household appliance - Google Patents

Water-guiding household appliance Download PDF

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Publication number
EP2287384B1
EP2287384B1 EP20100171827 EP10171827A EP2287384B1 EP 2287384 B1 EP2287384 B1 EP 2287384B1 EP 20100171827 EP20100171827 EP 20100171827 EP 10171827 A EP10171827 A EP 10171827A EP 2287384 B1 EP2287384 B1 EP 2287384B1
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EP
European Patent Office
Prior art keywords
water
domestic appliance
inlet
valve
domestic
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EP20100171827
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German (de)
French (fr)
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EP2287384A1 (en
Inventor
Werner Haltmayer
Anton Oblinger
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Priority to PL10171827T priority Critical patent/PL2287384T3/en
Publication of EP2287384A1 publication Critical patent/EP2287384A1/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/088—Liquid supply arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87788—With valve or movable deflector at junction

Definitions

  • the Fig. 1 shows a sectional representation of a household dishwasher 1 as an example of a water-conducting household appliance.
  • the domestic dishwasher 1 has a washing container 2 for receiving items to be washed, which can be classified for example in a Geschirroberkorb 3 and a dish rack 4.
  • a washing container 2 for receiving items to be washed, which can be classified for example in a Geschirroberkorb 3 and a dish rack 4.
  • the spraying devices are designed as upper and lower spray arms 5, 6.
  • the liquid can be conveyed by a circulation pump 7 via a first liquid supply line 8 to the upper spray arm 5 and via a second liquid supply line 9 to the lower spray arm 6.
  • the circulation pump 7 is e.g. by means of an electric drive, not shown, in particular by means of its electric motor driven.
  • the liquid is heated, at least in a partial program step of a washing program of the domestic dishwasher 1 by a water heater 10 which is connected to an inlet nozzle 11 to the circulation pump 7 and with outlet nozzle 12, 13 to the liquid supply lines 8, 9.
  • the number of outlet ports 12, 13 corresponds to the number of spray arms 5, 6 or simultaneously operated groups of spray arms 5, 6.
  • the number of spray arms 5, 6 Circulating pump 7 conveyed liquid is therefore in the case of the present embodiment to the inlet nozzle 11 of the water heater 10 and from the outlet nozzle 12, 13 via the liquid supply lines 8, 9 to the spray arms 5, 6 passed.
  • the domestic dishwasher 1 further comprises a water diverter 14, e.g. arranged in the flow heater 10 or is integrally formed thereon.
  • the water diverter 14 may e.g. but also be arranged in the household dishwasher 1 by itself or be connected directly to the circulation pump 7.
  • the spray arms 5, 6 can be alternately and / or constantly charged with the liquid, which is achieved by opening a liquid outlet and by closing another liquid outlet of the water switch 14.
  • the Fig. 2 shows a water supply system of the household dishwasher 1.
  • the water supply system comprises a plurality of water connections, in particular in the form of a first inlet flow valve 15 and a second inlet valve 16.
  • the inlet valves 15, 16 are e.g. Solenoid valves and are connected, for example, in a manner not shown with a control device of the household dishwasher 1, the u.A. is arranged to control the operation of the domestic dishwasher 1 and the inlet valves 15, 16 to open and close.
  • the two inlet valves 15, 16 are provided to be connected to a not-shown water network.
  • One of the inlet valves 15, 16 can be connected, for example, to a cold water connection and the other to a hot or hot water connection of the water network to supply the household dishwasher 1 with cold or preheated water.
  • the water supply system of the domestic dishwasher 1 comprises in the case of the present embodiment, two water supply lines, for example in the form of a first water hose 17, which is connected to the first inlet valve 15, and a second water hose 18, which is connected to the second inlet valve 16.
  • the inlet valves 15, 16 facing away from the ends of the water hoses 17, 18 are provided with a Appliance inlet of the household dishwasher 1 connected. Via the appliance inlet, the water coming from the water connections reaches the washing container 2 in order to form the washing liquor when mixed with a washing-up liquid.
  • a backflow prevention device 21, 22 is connected in each of the water pipes 17, 18 in each of the water pipes 17, 18 in each of the water pipes 17, 18 .
  • the two backflow prevention devices 21, 22 are arranged so that water in the water hoses 17, 18 only in the direction of arrows 23, 24, ie from the inlet valves 15, 16 in the direction of device inlet, but not in the opposite direction, ie in the direction of inlet valves 15, 16 flow can.

Description

Die Erfindung betrifft ein wasserführendes Hausgerät, beispielsweise eine Haushaltsgeschirrspülmaschine oder eine Haushaltswaschmaschine.The invention relates to a water-conducting domestic appliance, for example a domestic dishwasher or a household washing machine.

Wasserführende Hausgeräte, wie z.B. Geschirrspülmaschinen oder Waschmaschinen, weisen Wasseranschlüsse auf, mit denen die Hausgeräte z. B. an das Frischwassernetz angeschlossen werden können. Wird ein solches Hausgerät über eine Wasserzulauflaufleitung an das Wassernetz angeschlossen, dann ist es möglich, dass in der Wasserzulauflaufleitung befindliches Wasser in das Wassernetz zurückfließt.Water-bearing household appliances, such as Dishwashers or washing machines, have water connections, with which the home appliances z. B. can be connected to the fresh water network. If such a domestic appliance is connected to the water network via a water feed line, then it is possible that water located in the water inlet line flows back into the water network.

Für doppelwandig ausgebildete Druckfluidleitung, welche eine innere Leitung und eine diese umgebende äußere Leitung aufweisen, sind Schlauchbruchsicherungsvorrichtungen bekannt, welche bei einer Druckerhöhung in der äußeren Leitung infolge eines Bruches der inneren Leitung ein Ventil schließen, um eine weitere Druckfluidströmung zu unterbinden. Eine derartige Schlauchbruchsicherungsvorrichtung ist beispielsweise in der DE 35 16 795 A1 beschrieben.For double-walled pressure fluid line, which have an inner pipe and an outer pipe surrounding it, hose rupture devices are known which close a valve at an increase in pressure in the outer conduit due to a breakage of the inner conduit to prevent further pressure fluid flow. Such a hose rupture protection device is for example in the DE 35 16 795 A1 described.

Aufgabe der Erfindung ist es, ein wasserführendes Hausgerät derart auszuführen, dass verhindert wird, dass in einer Wasserzulaufleitung des Hausgerätes befindliches Wasser in das Wassernetz gelangt.The object of the invention is to carry out a water-conducting domestic appliance in such a way that it prevents that located in a water supply line of the domestic appliance water enters the water network.

Die Aufgabe der Erfindung wird gelöst durch ein wasserführendes Hausgerät, aufweisend wenigstens eine Wasserzulaufleitung zum Versorgen des Hausgerätes mit Wasser aus einem Wassernetz und eine Rückflussverhinderungsvorrichtung, die in die Wasserzulaufleitung geschaltet ist und eingerichtet ist, lediglich einen Wasserzufluss in Richtung Hausgerät zu ermöglichen, jedoch einen Wasserrückfluss in Richtung Wassernetz zu verhindern. Das erfindungsgemäße Hausgerät ist z.B. eine Geschirrspülmaschine oder eine Waschmaschine.The object of the invention is achieved by a water-conducting domestic appliance, comprising at least one water supply line for supplying the household appliance with water from a water network and a backflow prevention device, which is connected in the water supply line and is adapted to allow only a water flow towards home appliance, but a water return to prevent water supply. The domestic appliance according to the invention is e.g. a dishwasher or a washing machine.

Erfindungsgemäß umfasst demnach das Hausgerät die in die Wasserzulaufleitung des Hausgerätes geschaltete Rückflussverhinderungsvorrichtung, die lediglich erlaubt, dass durch die Wasserzulaufleitung strömendes Wasser in eine Zulaufrichtung strömen kann, nämlich vom Wassernetz in Richtung Hausgerät. Dadurch, dass die Rückflussverhinderungsvorrichtung eine Flussrichtung des in der Wasserzulaufleitung befindlichen Wassers weg vom Hausgerät insbesondere zum Wassernetz verhindert, sind Vorraussetzungen geschaffen, dass in der Wasserzulaufleitung befindliches Wasser nicht zurück ins Wassernetz fließen kann.According to the invention, the domestic appliance accordingly comprises the backflow prevention device connected in the water supply line of the domestic appliance, which merely allows water flowing through the water feed line to flow in an inlet direction, namely from the water network towards home appliance. The fact that the backflow prevention device prevents a flow direction of the water in the water supply line away from the domestic appliance, in particular to the water network, conditions are provided that located in the water supply line water can not flow back into the water network.

Das erfindungsgemäß Hausgerät kann vorzugsweise mehrere Wasserzulaufleitungen zum Versorgen des Hausgerätes mit Wasser aus dem Wassernetz umfassen, wobei vorzugsweise jede der Wasserzulaufleitungen eine Rückflussverhinderungsvorrichtung aufweist, die in die relevante Wasserzulaufleitung geschaltet ist und eingerichtet ist, lediglich einen Wasserzufluss in Richtung Hausgerät zu ermöglichen, jedoch einen Wasserrückfluss in Richtung Wassernetz zu verhindern. Eine solche Ausführungsform kann z.B. dann vorgesehen sein, wenn das efindungemäße Hausgerät mit kaltem und vorgewärmtem Wasser versorgt werden soll. Dann ist es möglich, dass eine der Wasserzulaufleitungen an einen Kaltwasseranschluss und die andere an einen Warm- oder Heißwasseranschluss angeschlossen werden kann.The household appliance according to the invention may preferably comprise a plurality of water supply lines for supplying the domestic appliance with water from the water network, wherein preferably each of the water supply lines has a backflow prevention device which is connected in the relevant water supply line and is arranged to allow only a water flow towards the domestic appliance, but a water return to prevent water supply. Such an embodiment may e.g. then be provided if the efindungemäße household appliance to be supplied with cold and preheated water. Then it is possible that one of the water supply lines can be connected to a cold water connection and the other to a hot or hot water connection.

Die Wasserzulaufleitung bzw. die Wasserzulaufleitungen können als ein Wasserschlauch bzw. als Wasserschläuche ausgebildet sein. Insbesondere wenn der Wasserschlauch flexibel ausgeführt ist, dann erhöht sich der Anschlusskomfort des erfindungsgemäßen Hausgerätes an das Wassernetz.The water supply line or the water supply lines may be formed as a water hose or as water hoses. In particular, when the water hose is designed to be flexible, then the convenience of the domestic appliance according to the invention increases the connection to the water network.

Vorzugsweise kann der Wasserschlauch innerhalb eines Hüllschlauchs verlaufen. Ist z.B. der Wasserschlauch undicht, so kann der Hüllschlauch auslaufendes Wasser auffangen.Preferably, the water hose can run within a Hüllschlauchs. Is e.g. If the water hose leaks, the hose can catch leaking water.

Erfindungsgemäß ist die Wasserzulaufleitung mittels eines Zulaufventils an das Wassernetz anschließbar. Das Zulaufventil ist z.B. ein Magnetventil, das beispielsweise von einer Steuerungsvorrichtung des erfindungsgemäßen Hausgerätes geöffnet und geschlossen werden kann, um z.B. den Wasserzulauf des erfindungemäßen Hausgerätes zu steuern. Die Rückflussverhinderungsvorrichtung ist demnach eingerichtet, einen Wasserfluss in Richtung Zulaufventil zu verhindern.According to the invention, the water supply line can be connected to the water network by means of an inlet valve. The inlet valve is, for example, a solenoid valve that can be opened and closed, for example, by a control device of the domestic appliance according to the invention, for example, to control the water supply of the inventive household appliance. The backflow prevention device is thus adapted to prevent a flow of water in the direction of the inlet valve.

Das Zulaufventil und die Wasserzulaufleitung können vorzugsweise ein Wasserstopp-System bilden. Dann weist dieses gegebenenfalls einen Sicherheitsmechanismus auf, um bei einem Defekt insbesondere des Wasserschlauchs bzw. der Wasserschläuche den Wasserzulauf zu verhindern, indem z.B. automatisch die Steuerungsvorrichtung das bzw. die Zulaufventile sperrt.The inlet valve and the water supply line may preferably form a water stop system. If necessary, this then has a safety mechanism in order to prevent water ingress in the event of a defect, in particular of the water hose or the water hoses, for example by automatically blocking the control device or the inlet valves.

Nach einer bevorzugten Ausführungsform des erfindungsgemäßen Hausgerätes ist die Rückflussverhinderungsvorrichtung als ein Rückschlagventil ausgebildet. Ein Rückschlagventil ist eingerichtet, den Durchgang des durch ihn fließenden Wassers in einer Strömungsrichtung selbsttätig zu sperren, hier also in Richtung Wassernetz. Das Rückschlagventil kann beispielsweise ein federbelastetes Rückschlagventil sein, bei dem ein Schließelement in Richtung Wassernetz durch eine Feder geschlossen, in Richtung Hausgerät dagegen vom durch die Wasserzulaufleitung, gegebenenfalls durch den Wasserschlauch strömenden Wasser freigegeben wird. Als Schließelement kann z.B. eine Kugel, ein Kegel, eine Klappe oder eine Membran verwendet werden, die mittels der Feder gegen einen Ein- bzw. Ausgang eines Durchgangskanals des Rückschlagventils drückt.According to a preferred embodiment of the domestic appliance according to the invention, the backflow prevention device is designed as a check valve. A check valve is set up to automatically block the passage of the water flowing through it in a flow direction, in this case in the direction of the water network. The check valve may be, for example, a spring-loaded check valve, in which a closing element in the direction of water network closed by a spring, in the direction home appliance, however, is released by the water through the water supply line, possibly through the water hose flowing water. As closing element, e.g. a ball, a cone, a flap or a diaphragm can be used, which presses by means of the spring against an inlet or outlet of a through-channel of the check valve.

Das erfindungsgemäße Hausgerät stellt demnach gegebenenfalls eine Rückströmsperre insbesondere bei Geschirrspülmaschinen mit Warm- und Kaltwasseranschluss, insbesondere für die Möglichkeit der Nutzung von Solarwärme, bereit. Aufgrund des Einbaus bzw. Einfügens der Rückflussverhinderungsvorrichtung insbesondere in Form des Rückschlagventils in jede Wasserzulauflaufleitung wird eine Rückströmung von in der jeweiligen Wasserzulauflaufleitung befindlichem Wasser in das Wassernetz verhindert. Insbesondere bei Verwendung des Rückschlagventils kann das erfindungsgemäße Hausgerät relativ kostengünstig realisiert werden. Es sind keine aufwendigen Modifizierungen eines Wasserstopp-Ventils, insbesondere Aquastopp-Ventils erforderlich, das ggf. am stromaufwärtsseitigen bzw. einlaufseitigen Ende jeder Wasserzulaufleitung vorgesehen ist.The household appliance according to the invention therefore optionally provides a non-return valve, in particular for dishwashers with hot and cold water connection, in particular for the possibility of using solar heat. Due to the installation or insertion of the backflow prevention device, in particular in the form of the check valve in each water inlet line, a backflow is prevented by located in the respective water inlet line water in the water network. In particular when using the check valve, the domestic appliance according to the invention can be realized relatively inexpensively. There are no costly modifications of a water stop valve, in particular Aquastopp valve required, which is possibly provided at the upstream or inlet end of each water supply line.

Die Erfindung betrifft demnach gegebenenfalls ein Rückschlagventil zur Verhinderung von Rückströmung, integriert in den Wasserzulauf eines Hausgerätes mit einem bzw. mit zwei Wasserzulaufleitungen (Warm- und Kaltwasser).Accordingly, the invention optionally relates to a check valve for the prevention of backflow, integrated into the water inlet of a domestic appliance with one or two water supply lines (hot and cold water).

Sonstige Aus- und Weiterbildungen der Erfindung sind in den Unteransprüchen wiedergegeben. Die vorstehend erläuterten und/oder in den Unteransprüchen wiedergegebenen vorteilhaften Aus- sowie Weiterbildungen der Erfindung können dabei einzeln oder aber auch in beliebiger Kombination miteinander bei der erfindungsgemäßen Geschirrspülmaschine zur Anwendung kommen.Other embodiments and further developments of the invention are given in the dependent claims. The above-explained and / or reproduced in the dependent claims advantageous embodiments and developments of the invention can be used individually or else in any combination with each other in the dishwasher according to the invention for use.

Die Erfindung und ihre Aus- sowie Weiterbildung sowie deren Vorteile werden nachfolgend anhand von Zeichnungen erläutert.The invention and its training and development and their advantages are explained below with reference to drawings.

Es zeigen jeweils schematisch:

Fig. 1.
eine Haushaltsgeschirrspülmaschine mit einer erfindungsgemäß ausgeführten Wasserzulaufeinrichtung, und
Fig. 2
das Wasserzulaufsystem der Haushaltsgeschirrspülmaschine.
Each show schematically:
Fig. 1.
a domestic dishwasher with an inventively designed water inlet device, and
Fig. 2
the water inlet system of household dishwasher.

Elemente mit gleicher Funktion und Wirkungsweise sind in den Figuren 1 und 2 jeweils mit denselben Bezugszeichen versehen.Elements with the same function and mode of action are in the FIGS. 1 and 2 each provided with the same reference numerals.

Die Fig. 1 zeigt in geschnittener Darstellung eine Haushaltsgeschirrspülmaschine 1 als Beispiel eines wasserführenden Hausgerätes.The Fig. 1 shows a sectional representation of a household dishwasher 1 as an example of a water-conducting household appliance.

Die Haushaltsgeschirrspülmaschine 1 weist einen Spülbehälter 2 zur Aufnahme von Spülgut auf, das beispielsweise in einem Geschirroberkorb 3 und einem Geschirrunterkorb 4 eingeordnet werden kann. In dem Spülbehälter 2 sind zumindest zwei Sprühvorrichtungen zum Beaufschlagen des Spülguts mit einer Flüssigkeit angeordnet, die üblicherweise als Spülflotte bezeichnet wird. Im Falle des vorliegenden Ausführungsbeispiels sind die Sprühvorrichtungen als obere und untere Sprüharme 5, 6 ausgebildet. Die Flüssigkeit kann von einer Umwälzpumpe 7 über eine erste Flüssigkeitszuleitung 8 zum oberen Sprüharm 5 und über eine zweite Flüssigkeitszuleitung 9 zum unteren Sprüharm 6 gefördert werden. Die Umwälzpumpe 7 wird z.B. mittels eines nicht näher dargestellten elektrischen Antriebs, insbesondere mittels dessen elektrischen Motors, angetrieben.The domestic dishwasher 1 has a washing container 2 for receiving items to be washed, which can be classified for example in a Geschirroberkorb 3 and a dish rack 4. In the washing container 2, at least two spraying devices are arranged for charging the items to be washed with a liquid, which is usually referred to as washing liquor. In the case of the present embodiment, the spraying devices are designed as upper and lower spray arms 5, 6. The liquid can be conveyed by a circulation pump 7 via a first liquid supply line 8 to the upper spray arm 5 and via a second liquid supply line 9 to the lower spray arm 6. The circulation pump 7 is e.g. by means of an electric drive, not shown, in particular by means of its electric motor driven.

Im Falle des vorliegenden Ausführungsbeispiels wird die Flüssigkeit zumindest in einem Teilprogrammschritt eines Spülprogramms der Haushaltsgeschirrspülmaschine 1 durch einen Durchlauferhitzer 10 erwärmt, der mit einem Eingangsstutzen 11 an die Umwälzpumpe 7 und mit Ausgangsstutzen 12, 13 an die Flüssigkeitszuleitungen 8, 9 angeschlossen ist. Die Anzahl der Ausgangsstutzen 12, 13 entspricht der Anzahl der Sprüharme 5, 6 oder gleichzeitig betriebener Gruppen von Sprüharmen 5, 6. Die von der Umwälzpumpe 7 geförderte Flüssigkeit wird demnach im Falle des vorliegenden Ausführungsbeispiels zum Eingangsstutzen 11 des Durchlauferhitzers 10 und von dessen Ausgangsstutzen 12, 13 über die Flüssigkeitszuleitungen 8, 9 zu den Sprüharmen 5, 6 geleitet.In the case of the present embodiment, the liquid is heated, at least in a partial program step of a washing program of the domestic dishwasher 1 by a water heater 10 which is connected to an inlet nozzle 11 to the circulation pump 7 and with outlet nozzle 12, 13 to the liquid supply lines 8, 9. The number of outlet ports 12, 13 corresponds to the number of spray arms 5, 6 or simultaneously operated groups of spray arms 5, 6. The number of spray arms 5, 6 Circulating pump 7 conveyed liquid is therefore in the case of the present embodiment to the inlet nozzle 11 of the water heater 10 and from the outlet nozzle 12, 13 via the liquid supply lines 8, 9 to the spray arms 5, 6 passed.

Die Haushaltsgeschirrspülmaschine 1 weist ferner eine Wasserweiche 14 auf, die z.B. im Durchlauferhitzer 10 angeordnet oder an diesem angeformt ist. Die Wasserweiche 14 kann z.B. aber auch in der Haushaltsgeschirrspülmaschine 1 für sich allein angeordnet oder unmittelbar an die Umwälzpumpe 7 angeschlossen sein.The domestic dishwasher 1 further comprises a water diverter 14, e.g. arranged in the flow heater 10 or is integrally formed thereon. The water diverter 14 may e.g. but also be arranged in the household dishwasher 1 by itself or be connected directly to the circulation pump 7.

Mittels der Wasserweiche 14 können die Sprüharme 5, 6 jeweils abwechselnd und/oder ständig mit der Flüssigkeit beschickt werden, was durch Öffnen eines Flüssigkeitsauslasses und durch Verschließen eines anderen Flüssigkeitsauslasses der Wasserweiche 14 erzielt wird.By means of the water switch 14, the spray arms 5, 6 can be alternately and / or constantly charged with the liquid, which is achieved by opening a liquid outlet and by closing another liquid outlet of the water switch 14.

Die Fig. 2 zeigt ein Wasserzulaufsystem der Haushaltsgeschirrspülmaschine 1.The Fig. 2 shows a water supply system of the household dishwasher 1.

Im Falle des vorliegenden Ausführungsbeispiels umfasst das Wasserzulaufsystem mehrere Wasseranschlüsse insbesondere in Form eines ersten Zulauflaufventils 15 und eines zweiten Zulaufventils 16. Die Zulaufventile 15, 16 sind z.B. Magnetventile und sind beispielsweise in nicht dargestellter Weise mit einer Steuerungsvorrichtung der Haushaltsgeschirrspülmaschine 1 verbunden, die u.A. eingerichtet ist, den Betrieb der Haushaltsgeschirrspülmaschine 1 zu steuern und die Zulaufventile 15, 16 zu öffnen und zu schließen. Die beiden Zulaufventile 15, 16 sind vorgesehen, an ein nicht näher dargestelltes Wassernetz angeschlossen zu werden. Das eine der Zulaufventile 15, 16 kann beispielsweise an einen Kaltwasseranschluss und das andere an einen Warm- oder Heißwasseranschluss des Wassernetzes angeschlossen werden, um die Haushaltsgeschirrspülmaschine 1 mit kaltem oder vorgewärmtem Wasser zu versorgen.In the case of the present embodiment, the water supply system comprises a plurality of water connections, in particular in the form of a first inlet flow valve 15 and a second inlet valve 16. The inlet valves 15, 16 are e.g. Solenoid valves and are connected, for example, in a manner not shown with a control device of the household dishwasher 1, the u.A. is arranged to control the operation of the domestic dishwasher 1 and the inlet valves 15, 16 to open and close. The two inlet valves 15, 16 are provided to be connected to a not-shown water network. One of the inlet valves 15, 16 can be connected, for example, to a cold water connection and the other to a hot or hot water connection of the water network to supply the household dishwasher 1 with cold or preheated water.

Das Wasserzulaufsystem der Haushaltsgeschirrspülmaschine 1 umfasst im Falle des vorliegenden Ausführungsbeispiels zwei Wasserzulaufleitungen z.B. in Form eines ersten Wasserschlauchs 17, der mit dem ersten Zulaufventil 15 verbunden ist, und eines zweiten Wasserschlauchs 18, der mit dem zweiten Zulaufventil 16 verbunden ist. Die den Zulaufventilen 15, 16 abgewandten Enden der Wasserschläuche 17, 18 sind mit einem Geräteeinlauf der Haushaltsgeschirrspülmaschine 1 verbunden. Über den Geräteeinlauf gelangt das von den Wasseranschlüssen stammende Wasser in den Spülbehälter 2, um, wenn mit einem Spülmittel versetzt, die Spülflotte zu bilden.The water supply system of the domestic dishwasher 1 comprises in the case of the present embodiment, two water supply lines, for example in the form of a first water hose 17, which is connected to the first inlet valve 15, and a second water hose 18, which is connected to the second inlet valve 16. The inlet valves 15, 16 facing away from the ends of the water hoses 17, 18 are provided with a Appliance inlet of the household dishwasher 1 connected. Via the appliance inlet, the water coming from the water connections reaches the washing container 2 in order to form the washing liquor when mixed with a washing-up liquid.

Das Wasserzulaufsystem kann als Wasserstopp-System ausgeführt sein und dementsprechend einen Sicherheitsmechanismus umfassen, um bei einem Defekt insbesondere der Wasserschläuche 17, 18 die Wasserzufuhr zu verhindern, indem z.B. automatisch die Steuerungsvorrichtung die Zulaufventile 15, 16 sperrt. Zu diesem Zweck können auch die beiden Wasserschläuche 17, 18 innerhalb von Hüllschlauchen 19, 20 verlaufen, die z.B. Wellschläuche sind. Sind die Wasserschläuche 17, 18 undicht, so können die Hüllschläuche 19, 20 austretendes Wasser auffangen.The water supply system may be designed as a water stop system and accordingly comprise a safety mechanism to prevent water supply in the event of a defect, in particular of the water hoses 17, 18, e.g. automatically the control device, the inlet valves 15, 16 locks. For this purpose, the two water hoses 17, 18 can also run inside hoses 19, 20, which are e.g. Corrugated tubes are. If the water hoses 17, 18 are leaking, the sheath hoses 19, 20 can catch leaking water.

Um zu verhindern, dass in den Wasserschläuchen 17, 18 befindliches Wasser in Richtung der Zulaufventile 15, 16 und gegebenenfalls zurück in das Wassernetz fließen kann, ist in jede der Wasserleitungen 17, 18 jeweils eine Rückflussverhinderungsvorrichtung 21, 22 geschaltet. Die beiden Rückflussverhinderungsvorrichtungen 21, 22 sind eingerichtet, dass Wasser in den Wasserschläuchen 17, 18 lediglich in Richtung von Pfeilen 23, 24, also von den Zulaufventilen 15, 16 in Richtung Geräteeinlauf, jedoch nicht in Gegenrichtung, also in Richtung Zulaufventile 15, 16 fließen kann.In order to prevent water present in the water hoses 17, 18 from flowing in the direction of the inlet valves 15, 16 and optionally back into the water network, in each of the water pipes 17, 18 a backflow prevention device 21, 22 is connected. The two backflow prevention devices 21, 22 are arranged so that water in the water hoses 17, 18 only in the direction of arrows 23, 24, ie from the inlet valves 15, 16 in the direction of device inlet, but not in the opposite direction, ie in the direction of inlet valves 15, 16 flow can.

Die beiden Rückflussverhinderungsvorrichtungen 21, 22 sind z.B. jeweils als Rückschlagventile ausgebildet. Ein Rückschlagventil ist eingerichtet, den Durchgang des durch das relevante Rückstellventil fließenden Wassers in einer Strömungsrichtung selbsttätig zu sperren, im Falle des vorliegenden Ausführungsbeispiels also in Richtung Zulaufventile 15, 16.The two backflow prevention devices 21, 22 are e.g. each designed as check valves. A check valve is set up to automatically block the passage of the water flowing through the relevant return valve in a flow direction, ie in the direction of the inlet valves 15, 16 in the case of the present exemplary embodiment.

Die Rückschlagventile können beispielsweise federbelastete Rückschlagventile sein, bei denen ein Schließelement in Gegenrichtung der Pfeile 23, 24 durch eine Feder geschlossen, in Pfeilrichtung dagegen vom durch die Wasserschläuche 17, 18 strömenden Wasser freigegeben wird. Als Schließelement kann z.B. eine Kugel, ein Kegel, eine Klappe oder eine Membran verwendet werden, die mittels der Feder gegen einen Ein- bzw. Ausgang eines Durchgangskanals des Rückschlagventils drückt.The check valves may be, for example spring-loaded check valves in which a closing element in the opposite direction of the arrows 23, 24 closed by a spring, in the direction of arrow, however, is released by the water hoses 17, 18 flowing water. As a closing element, for example, a ball, a cone, a flap or a membrane can be used, which presses by means of the spring against an inlet or outlet of a through-channel of the check valve.

Indem in jeder der Zulaufleitungen 17, 18 zwischen den eingangsseitigen bzw. anschlussseitigen vorgesehenen Zulaufventilen 15, 16, insbesondere Wasserstoppventilen bzw. Aquastopventilen, und der Geschirrspülmaschine 1 jeweils eine Rückflussverhinderungsvorrichtung 21, 22 vorgesehen ist, ist also ein Rückfluss von Wasser oder Spülflottenflüssigkeit aus dem Flüssigkeitszirkulationssystem der Geschirrspülmaschine 1 in Richtung Aquastopventile 15, 16 über die Rückflussverhinderungsvorrichtungen 21, 22 hinweg weitgehend vermieden. Insbesondere kann ein Überkreuz- bzw. Querrückfluss von Wasser aus der einen Zuflussleitung 18 in die andere Zuflussleitung 17 (oder umgekehrt) durch die in die einzelnen Zulauf- bzw. Zuflussleitungen eingefügten Rückflussverhinderungsvorrichtungen 21, 22 in zuverlässiger Weise insbesondere dann verhindert werden, falls die beiden Zuflussleitungen 17, 18 ausgangsseitig an die beiden Eingängen einer Leitungszusammenführvorrichtung 30 angeschlossen und in ein gemeinsames Einleitungsstück 40 geführt sind, dessen Ausgang mit dem Flüssigkeitszirkulationssystem, insbesondere Pumpensumpf der Geschirrspülmaschine verbunden ist. Die Leitungszusammenführvorrichtung 30 sowie deren Einleitungsstück 40 sind in der Figur 2 strichpunktiert eingezeichnet. Es genügt deshalb in vorteilhafter Weise, wenn die eingangsseitigen Zulaufventile 15, 16, insbesondere Aquastopventile, derart ausgebildet sind, dass sie lediglich in Zulaufrichtung absperrbar sind, d.h. es ist nicht erforderlich, dass sie in Rücklaufrichtung, d.h. strömungsaufwärts druckfest gegen Rückströmungen ausgebildet sind.By in each of the feed lines 17, 18 between the input-side and connection-side provided inlet valves 15, 16, in particular water stop valves or Aquastopventilen, and the dishwasher 1 are each provided a backflow prevention device 21, 22, so is a reflux of water or Spülflottenflüssigkeit from the liquid circulation system the dishwasher 1 in the direction of Aquastopventile 15, 16 over the backflow prevention devices 21, 22 away largely avoided. In particular, a cross-back flow of water from one inflow line 18 into the other inflow line 17 (or vice versa) can be reliably prevented by the backflow prevention devices 21, 22 inserted into the individual inflow lines, especially if the two Inlet conduits 17, 18 are connected on the output side to the two inputs of a line merger 30 and guided into a common introduction piece 40, the output of which is connected to the liquid circulation system, in particular the pump sump of the dishwasher. The line merge device 30 and its introduction piece 40 are in the FIG. 2 drawn in dash-dotted lines. It is therefore sufficient in an advantageous manner, when the input-side inlet valves 15, 16, in particular Aquastopventile, are designed such that they are shut off only in the inlet direction, ie it is not necessary that they are pressure-resistant against backflow in the return direction, ie upstream formed.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
HaushaltsgeschirrspülmaschineDomestic dishwasher
22
Spülbehälterrinse tank
33
GeschirroberkorbDishes upper basket
44
GeschirrunterkorbHarnesspads basket
55
oberer Sprüharmupper spray arm
66
unteren Sprüharmlower spray arm
77
Umwälzpumpecirculating pump
8, 98, 9
erste Flüssigkeitszuleitung, Flüssigkeitszuleitungfirst liquid feed, liquid feed
1010
DurchlauferhitzerHeater
1111
Eingangsstutzeninlet connection
12, 1312, 13
Ausgangsstutzenoutlet connection
1414
Wasserweichewater points
15, 1615, 16
Zulaufventilinlet valve
17, 1817, 18
Wasserschlauchwater hose
19, 2019, 20
Hüllschlauchbuffer tube
21, 2221, 22
RückflussverhinderungsvorrichtungBackflow prevention device
23, 2423, 24
Pfeilarrow

Claims (7)

  1. Water-conducting domestic appliance, comprising at least one water feed duct (17, 18) for supply of the domestic appliance (1) with water from a water mains, wherein the at least one water feed duct (17, 18) is connectible with the water means by means of a feed valve (15, 16) and an end, which is remote from the feed valve (15, 16), of the at least one water feed duct (17, 18) is connected with an appliance inlet of the domestic appliance (1), characterised by a return flow prevention device (21, 22) which is connected into the water feed duct (17, 18) and arranged to make possible water forward flow merely in the direction of the domestic appliance (1), but to prevent return flow of water, which is located in the water feed duct (17, 18), in the direction of the feed valve (15, 16).
  2. Domestic appliance according to claim 1, characterised by a plurality of water feed ducts (17, 18) for supply of the domestic appliance (1) with water from the water mains, wherein each of the water feed ducts (17, 18) has a return flow prevention device (21, 22) which is connected into the relevant water feed duct (17, 18) and arranged to make possible a water forward flow merely in the direction of the domestic appliance (1), but to prevent a water return flow in the direction of the water mains.
  3. Domestic appliance according to claim 1 or 2, characterised in that the respective water feed duct is constructed as a water hose (17, 18).
  4. Domestic appliance according to claim 3, characterised in that the respective water hose (17, 18) extends within an encasing hose (19, 20).
  5. Domestic appliance according to any one of claims 1 to 4, characterised in that the respective feed valve (15, 16) and the water feed duct (17, 18) connected therewith form a water stop system.
  6. Domestic appliance according to any one of claims 1 to 5, characterised in that the respective return flow prevention device (21, 22) is constructed as a non-return valve.
  7. Domestic appliance according to any one of claims 1 to 6, which is constructed as a domestic dishwasher (1) or as a washing machine.
EP20100171827 2009-08-17 2010-08-04 Water-guiding household appliance Active EP2287384B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10171827T PL2287384T3 (en) 2009-08-17 2010-08-04 Water-guiding household appliance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009028588A DE102009028588A1 (en) 2009-08-17 2009-08-17 Water-conducting household appliance

Publications (2)

Publication Number Publication Date
EP2287384A1 EP2287384A1 (en) 2011-02-23
EP2287384B1 true EP2287384B1 (en) 2012-06-20

Family

ID=43086437

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EP20100171827 Active EP2287384B1 (en) 2009-08-17 2010-08-04 Water-guiding household appliance

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US (1) US20110036435A1 (en)
EP (1) EP2287384B1 (en)
DE (1) DE102009028588A1 (en)
ES (1) ES2387644T3 (en)
PL (1) PL2287384T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10335012B2 (en) 2015-10-19 2019-07-02 Electrolux Home Products, Inc. Dishwasher spray fill

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DE102005000627A1 (en) * 2005-01-03 2006-07-13 BSH Bosch und Siemens Hausgeräte GmbH Control unit for the supply of water-conducting household appliances
KR20070078145A (en) * 2006-01-26 2007-07-31 우성전기공업 주식회사 Device for preventing the flowing backward of solenoid type valve
US7574878B2 (en) * 2006-08-07 2009-08-18 Karl Siegfried Schroeder System and method for controlling the water flow of household appliances
DE102007057515A1 (en) * 2007-11-29 2009-06-04 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance

Also Published As

Publication number Publication date
ES2387644T3 (en) 2012-09-27
US20110036435A1 (en) 2011-02-17
PL2287384T3 (en) 2012-11-30
DE102009028588A1 (en) 2011-02-24
EP2287384A1 (en) 2011-02-23

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