EP1047334B2 - Circulating pump, notably for a water-circulating household appliance - Google Patents

Circulating pump, notably for a water-circulating household appliance Download PDF

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Publication number
EP1047334B2
EP1047334B2 EP99957271A EP99957271A EP1047334B2 EP 1047334 B2 EP1047334 B2 EP 1047334B2 EP 99957271 A EP99957271 A EP 99957271A EP 99957271 A EP99957271 A EP 99957271A EP 1047334 B2 EP1047334 B2 EP 1047334B2
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EP
European Patent Office
Prior art keywords
pump
heating device
water
housing
pump housing
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EP99957271A
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German (de)
French (fr)
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EP1047334B1 (en
EP1047334A1 (en
Inventor
Wolfram THÖRMER
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Miele und Cie KG
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Miele und Cie KG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4285—Water-heater arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/085—Arrangements or adaptations of pumps

Definitions

  • the invention relates to a circulating pump, in particular for a water-conducting household appliance, such as a dishwasher or washing machine, which is equipped with a washing container and an electric heater for Spülwasserer stiirmung with a flanged to the motor housing of the pump pump housing with suction and discharge nozzle for circulating in the circuit and heating liquid, where appropriate safety devices, such as thermal switches, pressure switches or the like. Provided for monitoring the liquid to be delivered in the water cycle.
  • the heating means for heating the rinsing liquid within the rinsing container preferably in the trough-shaped bottom part above or below the filter sieves.
  • dishwashing the heated by the tubular heater rinse water is then sucked by means of the device's own circulation pump and circulated on the dishes.
  • the usually designed as a centrifugal pump circulation pump outside the washing in the base area of the household appliance is installed accessible. Due to the physical separation of the pump and heater special care with regard to the tightness and the electrical safety of leading from the washing tub lines and electrical connections is necessary.
  • heating device for heating the rinsing liquid of a dishwasher is an electrical resistance heating (tubular heater) arranged outside of the metal part of the motor housing of the circulating pump, wherein the waterproof motor housing housed together with the flanged pump housing in the washing of the household appliance is and immersed in the rinsing liquid to be heated.
  • the leads of the electric heater are led out liquid-tight together with the lines of the engine from the pump housing and the washing.
  • a further variant is provided, according to which the heater is arranged inside the motor housing.
  • the pump motor must be protected from excessive heat load.
  • the heater can heat only indirectly via the metal motor housing the rinsing liquid to be circulated, so you must work with an increased heating power. Also, by the only indirectly transferable to the rinse water heat the efficiency the heating lowered.
  • the combination of heating and pump to a non-separable functional unit makes in a heater or pump failure the complete replacement of motor or pump including heating required.
  • the heating device is arranged behind the pump impeller on the side facing the pump motor. It has about the same radius as the impeller. This results in an elongated structure, which takes up more space. In addition, the heating is in a zone in which there is only a low flow velocity. This results in a poor removal of the heating heat, which in turn can lead to damage to the impeller and calcification of the radiator.
  • a conveying device for non-oxidising materials in which the pump housing is preceded by a heating section, around which a radiator is helically wound. Again, results from the heating section an elongated structure and the heat dissipation from the field of heating is bad; It must therefore be improved by an additional stirring rotor.
  • the invention raises the problem of creating a combinable with a circulation pump heating system for rinsing liquid, which works effectively and energy-saving, requires little installation space and easily accessible for servicing and is easily replaceable.
  • the combination of the heating device with the pump and its arrangement according to the invention in the watercourse of the pump, preferably in the pump housing, allows a fast lossless transfer of heat to the circulating rinsing liquid.
  • the heating system works very effectively and energy-saving.
  • the heater in any service case is also easily accessible and easily replaceable separately from the pump. Due to the design of the heater on Pumperigephase constructive measures in the pump drive and the electric pump motor are not necessary.
  • the combination of the heating device with the circulation pump advantageously provides the possibility, also the water circuit of the household appliance necessary safety devices, such as thermal switches, pressure switches, turbidity sensors or the like. Also on the pump housing preferably by plug or locking connections releasably to arrange. As a result, an in itself vorprüf bare unit can be completed.
  • a dishwasher (1) shown in FIG. 1 has a rinsing container (2) with two crockery baskets (3, 4) arranged one above the other, wherein a cutlery drawer (5) is provided in a third rinsing level above the upper crockery basket (4).
  • the baskets (3, 4) and the cutlery drawer (5) are guided in a known manner in the washing container (2) on rails (6).
  • the cutlery drawer (5) can be used separately in one of the baskets (3, 4) and a cutlery basket.
  • a third spraying device (9) above the cutlery drawer (5) is installed on the washing tub cover (10).
  • the spraying devices (7 to 9) designed as rotating spray arms are supplied with flushing fluid by a common circulating pump (11), which is mounted in the device housing below the washing compartment (2).
  • the circulation pump (11) discharge nozzle (12, 13) on its pump housing (14) to which the spray arms are connected.
  • an intake of the circulation pump (11) is designated, with which the rinsing liquid for the liquid circulation is sucked out of the washing.
  • the circulating pump (11) is preferably designed as a centrifugal pump in the pump housing (14) arranged pump impeller (16) for the transport of the rinsing liquid in the embodiment.
  • other types of pumps can be used.
  • FIG. 2 in the case of the pump (11) used for the sake of clarity and to illustrate the inventive combination of a rinsing-water heating device (17) with the pump housing (14), the pump housing cover (23), sh. Fig. 3 u. 4, omitted.
  • the outside of the washing compartment (2) arranged circulation pump (11) is combined with the electric heater (17) to a self-testable unit, the combined building modules (pump 11, heater 17) are mounted separately replaceable or disassembled.
  • the heating device (17) is arranged in the watercourse of the circulating pump (11) on the pump housing (14), preferably within the pump housing (14) between the intake stub (15) and the discharge stub (12, 13). This arrangement is advantageous for a powerful and effectively with high efficiency without heat losses working heater (17).
  • the heating device (17) operates as a tubular heating element (18) surrounded by the rinsing liquid.
  • the tubular heater (18) of the heater (17) is shown in FIG. 2 circumferentially annular preferably wound in the manner of a wound cylindrical coil and surrounds the pump impeller (16) concentrically.
  • a wound tubular heater (18) of the heater (17) is advantageously mounted in the pump housing (14) on the pump motor side housing half (24) of the pump housing (14), wherein the electrical connections (22) isolated and liquid-tight the cup-shaped housing wall of the pump housing (14 ).
  • the heating device (17) is expediently mounted at a distance from the walls of the pump housing (14) on the circulating pump (11).
  • the pump housing (14) in turn is detachably mounted on the motor housing (19) of the circulating pump (11).
  • Another advantageous arrangement is the releasable attachment of the heater (17) in the pump housing (14) on the removable pump housing cover (23) of the circulating pump (11) shown in FIG. 3 and 4.
  • a tubular heater (18 ') is used, however, as Spiral is formed, which is wound in the cover plane around the intake manifold (15) around.
  • the lid (23) is mounted, the spiral then lies in front of the covered pump impeller (16) so that it can rotate freely.
  • the heating device (17) is also mounted in this construction by inserted intermediate webs (25) at a distance from the walls of the pump housing (14) and the lid (23) on the pump (11) (see Fig .. 4).
  • the in the pump housing (14) arranged heater (17) with the exposed flushed tubular heater (18, 18 ') forms with the surrounding pump housing (14) a water heater of optimum power efficiency and high efficiency, since all heat in the rinse water circulation to the rinse directly is transmitted.
  • the heater (17) as a water heater could also be formed separately outside the pump housing (14) as a with a connection or discharge nozzle (12, 13) of the circulating pump (11) connectable coupling piece, which is preferably attachable to the nozzle , wherein the water connection connections for the heating device (17) and / or their electrical line connections (22) are also designed to be detachable from each other. It is also possible to form a part of the pump housing (14) itself as a heater (17) and this separate housing part releasably connected to the rest of the pump housing z. B. to connect by screwing liquid-tight.
  • the invention is not limited to circulating pumps in dishwashers or centrifugal pumps. Likewise, the invention can also be used in pumps in washing machines or generally for electric pumps in water circuits in which liquids are to be heated quickly and energy-saving. But especially in devices where there is little space for heating and pump and repair work u. U. must be performed quickly, as z. B. in devices in the laboratory or hospital area is the case.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cookers (AREA)
  • Washing And Drying Of Tableware (AREA)

Abstract

The invention relates to a circulating pump, notably for a water-circulating household appliance, such as a dishwasher or washing machine, which is provided with a wash tub and an electric heating device (17) for heating the wash-water, as well as a pump housing (14) which is flange-mounted on the motor housing of the pump and has suction and pressure stubs (15, 12, 13) for the liquid to be circulated and heated in the circular flow. Safety devices, such as thermostatic switches, pressure switches or such like are possibly provided for for monitoring the liquid to be circulated in the water circuit. According to the invention the heating device (17) is removably mounted on the pump housing (14) in the water circuit of the pump. The combination of heating device (17) and pump (11) and the positioning of same in the water circuit of said pump (11), preferably in the pump housing (14), permits the rapid and loss-free transfer of heat to the circulating wash-water. The heating system is thus able to operate in a highly efficient and energy-saving manner.

Description

Die Erfindung betrifft eine Umwälzpumpe, insbesondere für ein wasserführendes Haushaltgerät, wie Geschirrspülmaschine oder Waschmaschine, welche mit einem Spülbehälter und einer elektrischen Heizeinrichtung zur Spülwassererwärmung ausgestattet ist, mit einem am Motorgehäuse der Pumpe angeflanschten Pumpengehäuse mit Ansaug- und Druckstutzen für die im Kreislauf umzuwälzende und zu erwärmende Flüssigkeit, wobei ggf. Sicherheitseinrichtungen, wie Thermoschalter, Druckschalter oder dergl. zur Überwachung der zu fördernden Flüssigkeit im Wasserkreislauf vorgesehen sind.The invention relates to a circulating pump, in particular for a water-conducting household appliance, such as a dishwasher or washing machine, which is equipped with a washing container and an electric heater for Spülwassererwärmung with a flanged to the motor housing of the pump pump housing with suction and discharge nozzle for circulating in the circuit and heating liquid, where appropriate safety devices, such as thermal switches, pressure switches or the like. Provided for monitoring the liquid to be delivered in the water cycle.

Eine solche Pumpe ist aus der US 5 701 388 bekannt.Such a pump is known from US 5,701,388.

Bei wasserführenden Haushaltgeräten, insbesondere bei Geschirrspülmaschinen, ist es allgemein bekannt, die zum Erwärmen der Spülflüssigkeit dienende elektrische Heizeinrichtung innerhalb des Spülbehälters vorzugsweise im muldenförmig ausgebildeten Bodenteil über oder unter den Filtersieben anzuordnen. Beim Geschirrspülen wird das durch die Rohrheizkörper erwärmte Spülwasser mittels der geräteeigenen Umwälzpumpe dann angesaugt und im Kreislauf über das Geschirr geführt. Aus den Gründen einer einfachen Montage, Wartung sowie aus Platzgründen ist die im Regelfall als Kreiselpumpe ausgebildete Umwälzpumpe außerhalb des Spülbehälters im Sockelbereich des Haushaltgerätes zugänglich installiert. Durch die räumliche Trennung von Pumpe und Heizeinrichtung ist eine besondere Sorgfalt hinsichtlich der Dichtheit und der elektrischen Sicherheit der aus dem Spülbehälter führenden Leitungen und elektrischen Anschlüsse notwendig.In the case of water-conducting household appliances, in particular in dishwashers, it is generally known to arrange the heating means for heating the rinsing liquid within the rinsing container preferably in the trough-shaped bottom part above or below the filter sieves. When dishwashing the heated by the tubular heater rinse water is then sucked by means of the device's own circulation pump and circulated on the dishes. For reasons of ease of installation, maintenance and space reasons, the usually designed as a centrifugal pump circulation pump outside the washing in the base area of the household appliance is installed accessible. Due to the physical separation of the pump and heater special care with regard to the tightness and the electrical safety of leading from the washing tub lines and electrical connections is necessary.

Bei einer anderen bekannten Heizeinrichtung zum Erwärmen der Spülflüssigkeit einer Geschirrspülmaschine (vgl. DE 29 38 883 C2) ist eine elektrische Widerstandsheizung (Rohrheizkörper) außen am metallenen Teil des Motorgehäuses der Umwälzpumpe angeordnet, wobei das wasserdichte Motorgehäuse samt dem angeflanschten Pumpengehäuse im Spülbehälter des Haushaltgerätes untergebracht ist und in die zu erwärmende Spülflüssigkeit eintaucht. Die Anschlußleitungen der elektrischen Heizung sind zusammen mit den Leitungen des Motors aus dem Pumpengehäuse und dem Spülbehälter flüssigkeitsdicht herausgeführt. Bei diesem Technikstand ist auch eine weitere Variante vorgesehen, nach welcher die Heizung innenseitig im Motorgehäuse angeordnet ist. Hierbei ist jedoch der Pumpenmotor vor zu hoher Wärmebelastung zu schützen. Andererseits kann die Heizung nur indirekt über das metallene Motorgehäuse die umzuwälzende Spülflüssigkeit erwärmen, weshalb mit einer erhöhten Heizleistung gearbeitet werden muß. Auch ist durch die nur indirekt auf das Spülwasser übertragbare Wärme der Wirkungsgrad der Heizung herabgesetzt. Die Zusammenfassung von Heizung und Pumpe zu einer nicht trennbaren Funktionseinheit macht bei einem Heizungs- oder Pumpendefekt den kompletten Austausch von Motor bzw. Pumpe einschließlich Heizung erforderlich.In another known heating device for heating the rinsing liquid of a dishwasher (see DE 29 38 883 C2) is an electrical resistance heating (tubular heater) arranged outside of the metal part of the motor housing of the circulating pump, wherein the waterproof motor housing housed together with the flanged pump housing in the washing of the household appliance is and immersed in the rinsing liquid to be heated. The leads of the electric heater are led out liquid-tight together with the lines of the engine from the pump housing and the washing. In this technical version, a further variant is provided, according to which the heater is arranged inside the motor housing. However, the pump motor must be protected from excessive heat load. On the other hand, the heater can heat only indirectly via the metal motor housing the rinsing liquid to be circulated, so you must work with an increased heating power. Also, by the only indirectly transferable to the rinse water heat the efficiency the heating lowered. The combination of heating and pump to a non-separable functional unit makes in a heater or pump failure the complete replacement of motor or pump including heating required.

Es ist ebenfalls bekannt, die Heizeinrichtung für die Spülflüssigkeitserwärmung außerhalb des Spülbehälters entfernt von der Pumpe seitlich zwischen der Spülbehälteraußenwand und dem Außengehäuse anzuordnen, wobei als Beheizungssystem ein Durchlauferhitzer eingesetzt ist (vgl. EP 0 591 774 A1). Die separate Anordnung der Heizung außerhalb des Spülbehälters ist für den Servicefall zwar vorteilhaft, jedoch ist bei einer derartigen Ausführung die abdeckende Geräteaußenwand zu demontieren, wenn die Heizung im Schadensfall ausgewechselt oder repariert werden muß.It is also known to arrange the heater for the Spülflüssigkeitserwärmung outside the washing tank away from the pump laterally between the Spülbehälteraußenwand and the outer housing, wherein a heating water heater is used as a heating system (see, EP 0 591 774 A1). Although the separate arrangement of the heater outside of the washing is advantageous for service case, but in such an embodiment, the covering device outer wall to dismantle when the heater must be replaced or repaired in case of damage.

Bei der aus der US 5 701 288 bekannten Pumpe ist die Heizeinrichtung auf der zum Pumpenmotor gewandten Seite hinter dem Pumpenlaufrad angeordnet. Sie besitzt etwa den gleichen Radius wie das Laufrad. Hierdurch ergibt sich ein langgestreckter Aufbau, welcher mehr Bauraum beansprucht. Außerdem liegt die Heizung in einer Zone, in der nur eine geringe Anströmgeschwindigkeit herrscht. Hieraus resultiert ein schlechter Abtransport der Heizungswärme, was wiederum zur Beschädigung des Laufrads und zum Verkalken des Heizkörpers führen kann.In the pump known from US Pat. No. 5,701,288, the heating device is arranged behind the pump impeller on the side facing the pump motor. It has about the same radius as the impeller. This results in an elongated structure, which takes up more space. In addition, the heating is in a zone in which there is only a low flow velocity. This results in a poor removal of the heating heat, which in turn can lead to damage to the impeller and calcification of the radiator.

Aus der DE 36 27 732 A1 ist eine Fördereinrichtung für Fließstoffe bekannt, bei der dem Pumpengehäuse ein Beheizungsabschnitt vorangestellt ist, um den schraubenförmig ein Heizkörper gewickelt ist. Auch hier ergibt sich durch den Beheizungsabschnitt ein langgestreckter Aufbau und die Wärmeabführung aus dem Bereich der Heizung ist schlecht; sie muss deshalb durch einen zusätzlichen Rührrotor verbessert werden.From DE 36 27 732 A1 a conveying device for non-oxidising materials is known, in which the pump housing is preceded by a heating section, around which a radiator is helically wound. Again, results from the heating section an elongated structure and the heat dissipation from the field of heating is bad; It must therefore be improved by an additional stirring rotor.

Der Erfindung stellt sich das Problem, ein mit einer Umwälzpumpe kombiniertes Beheizungssystem für Spülflüssigkeit zu schaffen, das effektiv und energiesparend arbeitet, wenig Einbauplatz beansprucht und für den Servicefall leicht zugänglich sowie einfach austauschbar ist.The invention raises the problem of creating a combinable with a circulation pump heating system for rinsing liquid, which works effectively and energy-saving, requires little installation space and easily accessible for servicing and is easily replaceable.

Erfindungsgemäß wird dieses Problem durch die in den unabhängigen Patentansprüchen 1 und 4 angegebenen Merkmale gelöst.According to the invention, this problem is solved by the features specified in the independent claims 1 and 4.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den jeweils nachfolgenden Unteransprüchen.Advantageous embodiments and modifications of the invention will become apparent from the respective following subclaims.

Die Kombination der Heizungeinrichtung mit der Pumpe und deren erfindungsgemäße Anordnung im Wasserlauf der Pumpe, vorzugsweise im Pumpengehäuse, ermöglicht eine schnelle verlustfreie Übertragung der Wärme auf die umlaufende Spülflüssigkeit. Das Beheizungssystem arbeitet sehr effektiv und energiesparend. Ferner beansprucht die flache und raumsparende Ausgestaltung des Rohrheizkörpers in Form einer Spirale bzw. Zylinderspule wenig Einbauplatz. Vorteilhaft ist die Heizung im eventuellen Servicefall außerdem leicht zugänglich und separat von der Pumpe einfach austauschbar. Durch die Ausbildung der Heizeinrichtung am Pumperigehäuse sind konstruktive Maßnahmen beim Pumpenantrieb bzw. am elektrischen Pumpenmotor nicht notwendig.The combination of the heating device with the pump and its arrangement according to the invention in the watercourse of the pump, preferably in the pump housing, allows a fast lossless transfer of heat to the circulating rinsing liquid. The heating system works very effectively and energy-saving. Furthermore claimed the flat and space-saving design of the tubular heater in the form of a spiral or cylindrical coil little slot. Advantageously, the heater in any service case is also easily accessible and easily replaceable separately from the pump. Due to the design of the heater on Pumperigehäuse constructive measures in the pump drive and the electric pump motor are not necessary.

Die Kombination der Heizeinrichtung mit der Umwälzpumpe schafft vorteilhaft die Möglichkeit, auch die für den Wasserkreislauf des Haushaltgerätes notwendigen Sicherheitseinrichtungen, wie Thermoschalter, Druckschalter, Trübungssensoren oder dergl. ebenfalls am Pumpengehäuse vorzugsweise durch Steck- oder Rastverbindungen lösbar mit anzuordnen. Hierdurch kann eine in sich vorprüf bare Baueinheit komplettiert werden.The combination of the heating device with the circulation pump advantageously provides the possibility, also the water circuit of the household appliance necessary safety devices, such as thermal switches, pressure switches, turbidity sensors or the like. Also on the pump housing preferably by plug or locking connections releasably to arrange. As a result, an in itself vorprüf bare unit can be completed.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen rein schematisch dargestellt und nachfolgend näher beschrieben.Embodiments of the invention are shown purely schematically in the drawings and described in more detail below.

Es zeigen:

Figur 1
den Wasserweg in einer Geschirrspülmaschine in vereinfachter Form,
Figur 2
eine Umwälzpumpe der Geschirrspülmaschine mit geöffnetem Pumpengehäuse und eingebauter Heizeinrichtung für die Spülflüssigkeit, in perspektivischer Ansicht,
Figur 3
einen Deckel des Pumpengehäuses der Umwälzpumpe in Kombination mit einer weiteren Ausführungsform der Heizeinrichtung nach der Erfindung, im Längsschnitt,
Figur 4
den mit der Heizeinrichtung kombinierten Pumpengehäusedeckel in der Seitenansicht.
Show it:
FIG. 1
the waterway in a dishwasher in a simplified form,
FIG. 2
a circulation pump of the dishwasher with an open pump housing and built-in heating device for the washing liquid, in perspective view,
FIG. 3
a lid of the pump housing of the circulating pump in combination with a further embodiment of the heating device according to the invention, in longitudinal section,
FIG. 4
the combined with the heater pump housing cover in side view.

Eine in Fig. 1 dargestellte Geschirrspülmaschine (1) weist einen Spülbehälter (2) mit zwei übereinander angeordneten Geschirrkörben (3, 4) auf, wobei in einer dritten Spülebene über dem oberen Geschirrkorb (4) eine Besteckschublade (5) vorgesehen ist. Die Geschirrkörbe (3, 4) sowie die Besteckschublade (5) sind in bekannter Weise im Spülbehälter (2) auf Laufschienen (6) geführt. Anstelle der Besteckschublade (5) kann in einem der Geschirrkörbe (3, 4) auch ein Besteckkorb separat eingesetzt werden.A dishwasher (1) shown in FIG. 1 has a rinsing container (2) with two crockery baskets (3, 4) arranged one above the other, wherein a cutlery drawer (5) is provided in a third rinsing level above the upper crockery basket (4). The baskets (3, 4) and the cutlery drawer (5) are guided in a known manner in the washing container (2) on rails (6). Instead of the cutlery drawer (5) can be used separately in one of the baskets (3, 4) and a cutlery basket.

Unter jedem Geschirrkorb (3, 4) ist eine diesem Korb zugeordnete Sprühvorrichtung (7, 8) für das zu reinigende Geschirr vorgesehen. Eine dritte Sprühvorrichtung (9) über der Besteckschublade (5) ist an der Spülbehälterdecke (10) installiert. Die als rotierende Sprüharme ausgebildeten Sprühvorrichtungen (7 bis 9) werden von einer gemeinsamen Umwälzpumpe (11), die im Gerätegehäuse unterhalb des Spülbehälters (2) montiert ist, mit Spülflüssigkeit versorgt. Hierfür weist die Umwälzpumpe (11) Druckstutzen (12, 13) an ihrem Pumpengehäuse (14) auf, an welche die Sprüharme angeschlossen sind. Mit (15) ist ein Ansaugstutzen der Umwälzpumpe (11) bezeichnet, mit dem die Spülflüssigkeit für den Flüssigkeitsumlauf aus dem Spülbehälter angesaugt wird. Die Umwälzpumpe (11) ist im Ausführungsbeispiel vorzugsweise als Kreiselpumpe mit im Pumpengehäuse (14) angeordnetem Pumpenlaufrad (16) für den Transport der Spülflüssigkeit ausgebildet. Jedoch können auch andere Pumpentypen eingesetzt werden.Under each crockery basket (3, 4) a basket associated with this spray device (7, 8) is provided for the dishes to be cleaned. A third spraying device (9) above the cutlery drawer (5) is installed on the washing tub cover (10). The spraying devices (7 to 9) designed as rotating spray arms are supplied with flushing fluid by a common circulating pump (11), which is mounted in the device housing below the washing compartment (2). For this purpose, the circulation pump (11) discharge nozzle (12, 13) on its pump housing (14) to which the spray arms are connected. With (15) an intake of the circulation pump (11) is designated, with which the rinsing liquid for the liquid circulation is sucked out of the washing. The circulating pump (11) is preferably designed as a centrifugal pump in the pump housing (14) arranged pump impeller (16) for the transport of the rinsing liquid in the embodiment. However, other types of pumps can be used.

Gemäß Fig. 2 ist bei der eingesetzten Pumpe (11) der besseren Übersicht halber und zur Veranschaulichung der erfindungsgemäßen Kombination einer Spülwasser-Heizeinrichtung (17) mit dem Pumpengehäuse (14) der Pumpengehäusedeckel (23), sh. Fig. 3 u. 4, fortgelassen worden. Die außerhalb des Spülbehälters (2) angeordnete Umwälzpumpe (11) ist mit der elektrischen Heizeinrichtung (17) zu einer in sich vorprüfbaren Baueinheit kombiniert, wobei die miteinander kombinierten Baumodule (Pumpe 11, Heizung 17) jedoch separat auswechselbar bzw. wiederlösbar montiert sind. Die Heizeinrichtung (17) ist im Wasserlauf der Umwälzpumpe (11) am Pumpengehäuse (14), vorzugsweise innerhalb des Pumpengehäuses (14) zwischen Ansaugstutzen (15) und Druckstutzen (12, 13) angeordnet. Diese Anordnung ist vorteilhaft für eine leistungsfähige und effektiv mit hohem Wirkungsgrad ohne Wärmeverluste arbeitende Heizeinrichtung (17). Dabei arbeitet die Heizeinrichtung (17) als ein von der Spülflüssigkeit umspülter Rohrheizkörper (18).According to FIG. 2, in the case of the pump (11) used for the sake of clarity and to illustrate the inventive combination of a rinsing-water heating device (17) with the pump housing (14), the pump housing cover (23), sh. Fig. 3 u. 4, omitted. The outside of the washing compartment (2) arranged circulation pump (11) is combined with the electric heater (17) to a self-testable unit, the combined building modules (pump 11, heater 17) are mounted separately replaceable or disassembled. The heating device (17) is arranged in the watercourse of the circulating pump (11) on the pump housing (14), preferably within the pump housing (14) between the intake stub (15) and the discharge stub (12, 13). This arrangement is advantageous for a powerful and effectively with high efficiency without heat losses working heater (17). In this case, the heating device (17) operates as a tubular heating element (18) surrounded by the rinsing liquid.

Der Rohrheizkörper (18) der Heizeinrichtung (17) ist gemäß Fig. 2 umlaufend ringförmig vorzugsweise in Art einer gewickelte Zylinderspule gewunden und umgibt das Pumpenlaufrad (16) konzentrisch. Ein so gewundener Rohrheizkörper (18) der Heizeinrichtung (17) ist vorteilhaft im Pumpengehäuse (14) an der pumpenmotorseitigen Gehäusehälfte (24) des Pumpengehäuses (14) montiert, wobei die elektrischen Anschlüsse (22) isoliert und flüssigkeitsdicht die topfförmige Gehäusewand des Pumpengehäuses (14) durchgreifen. Zweckmäßig ist die Heizeinrichtung (17) mit Abstand zu den Wandungen des Pumpengehäuses (14) an der Umwälzpumpe (11) montiert. Das Pumpengehäuse (14) seinerseits ist wiederum lösbar am Motorgehäuse (19) der Umwälzpumpe (11) montiert.The tubular heater (18) of the heater (17) is shown in FIG. 2 circumferentially annular preferably wound in the manner of a wound cylindrical coil and surrounds the pump impeller (16) concentrically. Such a wound tubular heater (18) of the heater (17) is advantageously mounted in the pump housing (14) on the pump motor side housing half (24) of the pump housing (14), wherein the electrical connections (22) isolated and liquid-tight the cup-shaped housing wall of the pump housing (14 ). The heating device (17) is expediently mounted at a distance from the walls of the pump housing (14) on the circulating pump (11). The pump housing (14) in turn is detachably mounted on the motor housing (19) of the circulating pump (11).

Eine andere vorteilhafte Anordnung ist die lösbare Befestigung der Heizeinrichtung (17) im Pumpengehäuse (14) am abnehmbaren Pumpengehäusedeckel (23) der Umwälzpumpe (11) gemäß Fig. 3 und 4. Dabei ist auch ein Rohrheizkörper (18') verwendet, der jedoch als Spirale ausgebildet ist, welche in der Deckelebene um den Ansaugstutzen (15) herum gewunden ist. Bei montiertem Deckel (23) liegt die Spirale dann vor dem abgedeckten Pumpenlaufrad (16), so daß dieses ungehindert rotieren kann. Die Heizeinrichtung (17) ist auch bei dieser Konstruktion durch eingefügte Zwischenstege (25) mit Abstand zu den Wandungen des Pumpengehäuses (14) bzw. des Deckels (23) an der Pumpe (11) montiert (sh. Fig. 4).Another advantageous arrangement is the releasable attachment of the heater (17) in the pump housing (14) on the removable pump housing cover (23) of the circulating pump (11) shown in FIG. 3 and 4. In this case, a tubular heater (18 ') is used, however, as Spiral is formed, which is wound in the cover plane around the intake manifold (15) around. When the lid (23) is mounted, the spiral then lies in front of the covered pump impeller (16) so that it can rotate freely. The heating device (17) is also mounted in this construction by inserted intermediate webs (25) at a distance from the walls of the pump housing (14) and the lid (23) on the pump (11) (see Fig .. 4).

Die im Pumpengehäuse (14) angeordnete Heizeinrichtung (17) mit dem freiliegenden umspülten Rohrheizkörper (18, 18') bildet mit dem umgebenden Pumpengehäuse (14) einen Durchlauferhitzer von optimaler Leistungsausnutzung und mit hohem Wirkungsgrad, da alle Wärme bei der Spülwasserumwälzung auf die Spülflüssigkeit direkt übertragen wird.The in the pump housing (14) arranged heater (17) with the exposed flushed tubular heater (18, 18 ') forms with the surrounding pump housing (14) a water heater of optimum power efficiency and high efficiency, since all heat in the rinse water circulation to the rinse directly is transmitted.

Gemäß einer nicht gezeigten Weiterbildung der Erfindung könnte die Heizeinrichtung (17) als Durchlauferhitzer auch separat außen am Pumpengehäuse (14) als ein mit einem Anschlußoder Druckstutzen (12, 13) der Umwälzpumpe (11) verbindbares Kupplungsstück ausgebildet sein, welches vorzugsweise am Stutzen aufsteckbar ist, wobei die Wasseranschlußverbindungen für die Heizeinrichtung (17) und/oder deren elektrischen Leitungsanschlüsse (22) ebenfalls untereinander lösbar gestaltet sind. Auch ist es möglich, einen Teil des Pumpengehäuses (14) selbst als Heizeinrichtung (17) auszubilden und diesen separaten Gehäuseteil wiederlösbar mit dem übrigen Pumpengehäuse z. B. durch Anschrauben flüssigkeitsdicht zu verbinden.According to a not shown embodiment of the invention, the heater (17) as a water heater could also be formed separately outside the pump housing (14) as a with a connection or discharge nozzle (12, 13) of the circulating pump (11) connectable coupling piece, which is preferably attachable to the nozzle , wherein the water connection connections for the heating device (17) and / or their electrical line connections (22) are also designed to be detachable from each other. It is also possible to form a part of the pump housing (14) itself as a heater (17) and this separate housing part releasably connected to the rest of the pump housing z. B. to connect by screwing liquid-tight.

Zweckmäßig ist es ferner, die den Spülwasserumlauf überwachenden bzw. kontrollierenden üblichen Bauelemente oder Sicherheitseinrichtungen, wie Thermoschalter (20), Druckschalter (21), Trübungssensoren usw. ebenfalls lösbar am Pumpengehäuse (14) flüssigkeitsdicht festzusetzen, wie dies bspw. in Fig. 2 gezeigt ist. Die Befestigung der Sicherheitseinrichtungen könnte vorzugsweise in Steck- oder Rastbauweise erfolgen, so daß eine mit allen Bauteilen komplett vorprüfbare Baueinheit geschaffen ist. Denkbar ist es auch, am Pumpengehäuse (14) mindestens eine Ventileinrichtung zum Absperren oder wahlweisen Öffnen der Pumpendruckstutzen (12, 13) vorzusehen.It is also expedient to monitor or control the flush water circulation conventional components or safety devices such as thermal switches (20), pressure switch (21), turbidity sensors, etc. also releasably fixed to the pump housing (14) liquid-tight, as shown, for example, in Fig. 2. The attachment of the safety devices could preferably be done in plug-in or latching construction, so that a completely pretestable with all components unit is created. It is also conceivable to provide at least one valve device for shutting off or selectively opening the pump discharge nozzle (12, 13) on the pump housing (14).

Die Erfindung ist nicht auf Umwälzpumpen in Geschirrspülmaschinen oder auf Kreiselpumpen beschränkt. Ebenso kann die Erfindung auch bei Pumpen in Waschmaschinen oder allgemein für elektrische Pumpen in Wasserkreisläufen einsetzt werden, bei denen Flüssigkeiten schnell und energiesparend erwärmt werden sollen. Insbesondere aber bei Geräten, bei denen geringer Einbauplatz für Heizung und Pumpe vorhanden ist und Reparaturarbeiten u. U. schnell durchgeführt werden müssen, wie dies z. B. bei Geräten im Labor oder Krankenhausbereich der Fall ist.The invention is not limited to circulating pumps in dishwashers or centrifugal pumps. Likewise, the invention can also be used in pumps in washing machines or generally for electric pumps in water circuits in which liquids are to be heated quickly and energy-saving. But especially in devices where there is little space for heating and pump and repair work u. U. must be performed quickly, as z. B. in devices in the laboratory or hospital area is the case.

Claims (12)

  1. Circulating pump (11), more especially for a water-conducting household appliance, such as a dishwasher (1) or washing machine, which is provided with a washing container (2) and an electric heating device (17) for heating-up the washing water, with a pump housing (14), which is flange-mounted on the motor housing (19) of the pump (11) and has intake and pressure connection pieces (12, 13, 15) for the liquid in circulation to be circulated and heated, wherein, where applicable, safety devices, such as thermostatic switches (20), pressure switches (21) or the like are provided for monitoring the liquid to be conveyed in the circulation of the water, and wherein the heating device (17) is disposed so as to be detachable on the pump housing (14) in the water flow of the pump (11), characterised in that the heating device (17) is in the form of a circularly wound heating body (18) and surrounds the pump impeller (16) in a concentric manner.
  2. Circulating pump according to claim 1, characterised in that the heating device (17) is disposed internally of the pump housing (14) in the water flow between intake and pressure connection pieces (15; 12, 13) of the pump (11).
  3. Circulating pump according to claims 1 and 2, characterised in that the heating device (17) is mounted in the pump housing (14) on the housing half (24) of the pump housing (14) on the side of the pump motor.
  4. Circulating pump (11), more especially for a water-conducting household appliance, such as a dishwasher (1) or washing machine, which is provided with a washing container (2) and an electric heating device (17) for heating-up the washing water, with a pump housing (14), which is flange-mounted on the motor housing (19) of the pump (11) and has intake and pressure connection pieces (12, 13, 15) for the liquid in circulation to be circulated and heated, wherein, where applicable, safety devices, such as thermostatic switches (20), pressure switches (21) or the like are provided for monitoring the liquid to be conveyed in the circulation of the water, and wherein the heating device (17) is disposed so as to be detachable on the pump housing (14) in the water flow of the pump (11), characterised in that the heating device (17) is configured as a tubular heating element (18') in the form of a spiral, the said tubular heating element being wound around the intake connection piece (15) on the detachable pump cover (23) in the cover plane.
  5. Circulating pump according to one or more of claims 1 to 4, characterised in that the tubular heating body (18; 18') forms a continuous flow heater with the pump housing (14), which surrounds the said tubular heating body.
  6. Circulating pump according to one or more of claims 1 to 5, characterised in that the heating device (17) is in the form of a separately mountable part of the pump housing (14).
  7. Circulating pump according to one or more of claims 1 to 6, characterised in that the heating device (17) is in the form of a coupling piece, which can be connected, preferably plugged-into, the connection or pressure connecting piece (12, 13) of the pump.
  8. Circulating pump according to one or more of claims 1 to 7, characterised in that the water connecting connections for the heating device (17) and/or the electrical line connections (19) of the heating device (17) are in the form of plug-in type locking connections or the like.
  9. Circulating pump according to one or more of claims 1 to 8, characterised in that the safety devices, such as thermostatic switch (20), pressure switch (21), turbidity sensors or the like are detachably disposed on the pump housing (14) preferably in a plug-in type manner, and in that the pump (11) is disposed on a washing machine or dishwasher externally of the washing container (2).
  10. Circulating pump according to one or more of claims 1 to 9, characterised in that at least one valve device is also disposed so as to be exchangeable on the pump housing (14) for the shutting-off or selective opening of the pump pressure connection pieces (12, 13).
  11. Circulating pump according to one or more of claims 1 to 10, characterised in that the heating device (17) is mounted at a spacing from (intermediate bar 22) the walls of the pump housing (14) on the circulating pump (11).
  12. Circulating pump according to claim 1 and to one or more of claims 4 to 11, characterised in that the heating device (17) is disposed outside on the pump housing (14).
EP99957271A 1998-11-13 1999-10-30 Circulating pump, notably for a water-circulating household appliance Expired - Lifetime EP1047334B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19852569A DE19852569A1 (en) 1998-11-13 1998-11-13 Circulation pump, in particular for water-bearing household appliances
DE19852569 1998-11-13
PCT/EP1999/008294 WO2000028878A1 (en) 1998-11-13 1999-10-30 Circulating pump, notably for a water-circulating household appliance

Publications (3)

Publication Number Publication Date
EP1047334A1 EP1047334A1 (en) 2000-11-02
EP1047334B1 EP1047334B1 (en) 2004-07-07
EP1047334B2 true EP1047334B2 (en) 2007-06-06

Family

ID=7887803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99957271A Expired - Lifetime EP1047334B2 (en) 1998-11-13 1999-10-30 Circulating pump, notably for a water-circulating household appliance

Country Status (5)

Country Link
EP (1) EP1047334B2 (en)
AT (1) ATE270521T1 (en)
DE (2) DE19852569A1 (en)
PL (1) PL192963B1 (en)
WO (1) WO2000028878A1 (en)

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DE10142525B4 (en) * 2001-08-30 2008-08-21 Miele & Cie. Kg Circulation pump with integrated flushing water heater and a temperature safety switch
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DE10354148A1 (en) * 2003-11-19 2005-06-30 Aweco Appliance Systems Gmbh & Co. Kg Pump for dishwasher or washing machine, has receptacle on one fluid connection for pressure monitoring device
ATE366542T1 (en) * 2004-05-12 2007-08-15 Askoll Holding Srl LIQUID CIRCULATION PUMP WITH A SYNCHRONOUS MOTOR, EQUIPPED WITH A DEVICE FOR HEATING THE LIQUID, ESPECIALLY FOR WASHING MACHINES
ITTO20040592A1 (en) * 2004-09-08 2004-12-08 Plaset Spa SNAIL FOR A CENTRIFUGAL PUMP
DE102006028913A1 (en) * 2006-06-21 2007-12-27 Aweco Appliance Systems Gmbh & Co. Kg Pump, in particular for water-bearing household machines
DE102007017271A1 (en) * 2007-04-12 2008-10-16 BSH Bosch und Siemens Hausgeräte GmbH Pump with heating device
KR101995421B1 (en) * 2010-12-31 2019-07-02 엘지전자 주식회사 Dishwasher
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CN105465050B (en) 2014-08-07 2019-06-11 德昌电机(深圳)有限公司 Heat pump
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Also Published As

Publication number Publication date
DE19852569A1 (en) 2000-05-18
EP1047334B1 (en) 2004-07-07
EP1047334A1 (en) 2000-11-02
PL341002A1 (en) 2001-03-12
PL192963B1 (en) 2006-12-29
WO2000028878A1 (en) 2000-05-25
DE59909911D1 (en) 2004-08-12
ATE270521T1 (en) 2004-07-15

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