EP1047334A1 - Circulating pump, notably for a water-circulating household appliance - Google Patents

Circulating pump, notably for a water-circulating household appliance

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Publication number
EP1047334A1
EP1047334A1 EP99957271A EP99957271A EP1047334A1 EP 1047334 A1 EP1047334 A1 EP 1047334A1 EP 99957271 A EP99957271 A EP 99957271A EP 99957271 A EP99957271 A EP 99957271A EP 1047334 A1 EP1047334 A1 EP 1047334A1
Authority
EP
European Patent Office
Prior art keywords
pump
heating device
housing
water
pump housing
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
EP99957271A
Other languages
German (de)
French (fr)
Other versions
EP1047334B2 (en
EP1047334B1 (en
Inventor
Wolfram THÖRMER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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
Family has litigation
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Application filed by Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP1047334A1 publication Critical patent/EP1047334A1/en
Application granted granted Critical
Publication of EP1047334B1 publication Critical patent/EP1047334B1/en
Publication of EP1047334B2 publication Critical patent/EP1047334B2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • 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

  • Circulation pump in particular for a water-bearing household appliance
  • the invention relates to a circulating pump, in particular for a water-carrying household appliance, such as a dishwasher or washing machine, which is equipped with a rinsing container and an electrical heating device for heating the rinsing water, with a pump housing flanged to the motor housing of the pump with suction and pressure ports for those to be circulated and closed heating liquid, safety devices such as thermal switches, pressure switches or the like being provided for monitoring the liquid to be conveyed in the water circuit.
  • a circulating pump in particular for a water-carrying household appliance, such as a dishwasher or washing machine, which is equipped with a rinsing container and an electrical heating device for heating the rinsing water, with a pump housing flanged to the motor housing of the pump with suction and pressure ports for those to be circulated and closed heating liquid, safety devices such as thermal switches, pressure switches or the like being provided for monitoring the liquid to be conveyed in the water circuit.
  • the electrical heating device used for heating the washing liquid within the washing container, preferably in the trough-shaped bottom part above or below the filter screens.
  • the circulation pump which is generally designed as a centrifugal pump, is installed in an accessible manner outside the flushing tank in the base area of the household appliance. Due to the spatial separation of the pump and heating device, special care must be taken with regard to the tightness and the electrical safety of the lines and electrical connections leading out of the flushing tank.
  • an electrical resistance heater (tubular heater) is arranged on the outside of the metal part of the motor housing of the circulation pump, the waterproof motor housing together with the flanged pump housing in the washing container of the house. Holding device is housed and immersed in the washing liquid to be heated.
  • the connection lines of the electric heater are led out together with the lines of the motor from the pump housing and the flushing tank in a liquid-tight manner.
  • the heater is arranged on the inside in the motor housing.
  • the pump motor must be protected from excessive heat.
  • the heater can only indirectly heat the rinsing liquid to be circulated via the metal motor housing, which is why an increased heating power must be used.
  • the efficiency of the heating is also reduced by the heat which can only be transferred indirectly to the rinsing water.
  • the combination of heating and pump into one In the case of a heating or pump defect, the inseparable functional unit requires the complete replacement of the motor or pump, including the heating.
  • the invention poses the problem of creating a heating system for rinsing liquid combined with a circulation pump, which works effectively and saves energy, takes up little installation space and is easily accessible and easily exchangeable for servicing purposes.
  • the combination of the heating device with the pump and its arrangement according to the invention in the water flow of the pump, preferably in the pump housing, enables rapid, lossless transfer of the heat to the circulating rinsing liquid.
  • the heating system works very effectively and saves energy.
  • the flat and space-saving design of the tubular heater in the form of a spiral or solenoid coil takes up little installation space.
  • the heating is also advantageously easily accessible and easily replaceable separately from the pump. Due to the design of the heating device on the pump housing, constructive measures for the pump drive or on the electric pump motor are not necessary.
  • the combination of the heating device with the circulation pump advantageously creates the possibility of also releasably arranging the safety devices required for the water circuit of the household appliance, such as thermal switches, pressure switches, turbidity sensors or the like, also preferably detachably on the pump housing by means of plug-in or snap-in connections. In this way, a pre-testable unit can be completed.
  • FIG. 1 shows the water path in a dishwasher in a simplified form
  • FIG. 2 shows a circulation pump of the dishwasher with an open pump housing and built-in heating device for the washing liquid, in a perspective view
  • FIG. 3 shows a cover of the pump housing of the circulation pump in combination with a further embodiment of the heating device according to the invention, in longitudinal section,
  • FIG 4 shows the pump housing cover combined with the heating device in a side view.
  • a dishwasher (1) shown in FIG. 1 has a washing container (2) with two crockery baskets (3, 4) arranged one above the other, a cutlery drawer (5) being provided in a third washing level above the upper crockery basket (4).
  • the crockery baskets (3, 4) and the cutlery drawer (5) are guided in a known manner in the washing compartment (2) on runners (6).
  • a cutlery basket can also be used separately in one of the crockery baskets (3, 4).
  • the spray devices (7 to 9), which are designed as rotating spray arms, are supplied with flushing liquid by a common circulating pump (11) which is mounted in the device housing below the flushing container (2).
  • the circulation pump (11) has pressure ports (12, 13) on its pump housing (14), to which the spray arms are connected. With (15) an intake port of the circulation pump (11) is designated, with which the washing liquid for the liquid circulation is sucked out of the washing container.
  • the circulation pump (11) in the exemplary embodiment is preferably designed as a circular pump with a pump impeller (16) arranged in the pump housing (14) for the transport of the rinsing liquid.
  • other types of pumps can also be used.
  • the circulation pump (1 1) arranged outside the rinsing tank (2) can be connected to the fresh heating device (17) combined to form a pre-testable unit, but the combined building modules (pump 11, heater 17) are separately replaceable or detachable.
  • the heating device (17) is arranged in the water flow of the circulating pump (11) on the pump housing (14), preferably inside the pump housing (14) between the suction connection (15) and the pressure connection (12, 13). This arrangement is advantageous for an efficient and efficient heating device (17) that works with high efficiency without heat loss.
  • the heating device (17) works as a tubular heating element (18) around which the flushing liquid flows.
  • the tubular heating element (18) of the heating device (17) is wound in an annular manner, preferably in the form of a wound solenoid, and concentrically surrounds the pump impeller (16).
  • a tubular heating element (18) of the heating device (17) which is wound in this way is advantageously mounted in the pump housing (14) on the pump motor-side housing half (24) of the pump housing (14), the electrical connections (22) isolating and liquid-tight the pot-shaped housing wall of the pump housing (14) reach through.
  • the heating device (17) is expediently mounted on the circulation pump (11) at a distance from the walls of the pump housing (14).
  • the pump housing (14) in turn is detachably mounted on the motor housing (19) of the circulation pump (11).
  • FIGS. 3 and 4 Another advantageous arrangement is the releasable attachment of the heating device (17) in the pump housing (14) on the removable pump housing cover (23) of the circulating pump (11) according to FIGS. 3 and 4.
  • a tubular heater (18 ') is also used, which, however, as Spiral is formed, which is wound around the intake manifold (15) in the cover plane.
  • the cover (23) When the cover (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 mounted on the pump (11) by inserting intermediate webs (25) at a distance from the walls of the pump housing (14) or the cover (23) (see FIG. 4).
  • the heating device (17) as a continuous flow heater could also be formed separately on the outside of the pump housing (14) as a coupling piece which can be connected to a connecting or pressure connection (12, 13) of the circulation pump (11) and which can preferably be plugged onto the connection ,
  • the water connection connections for the heating device (17) and / or their electrical line connections (22) likewise are designed to be detachable from one another. It is also possible to design part of the pump housing (14) itself as a heating device (17) and to detach this separate housing part with the rest of the pump housing, for. B. liquid-tight by screwing.
  • the conventional components or safety devices such as thermal switches (20), pressure switches (21), turbidity sensors, etc., which monitor or control the rinsing water circulation, also releasably in a liquid-tight manner on the pump housing (14), as is shown, for example, in FIG. 2 is shown.
  • the security devices could preferably be attached in a plug-in or snap-in construction, so that a structural unit that can be completely pre-tested is created. It is also conceivable to provide at least one valve device on the pump housing (14) for shutting off or optionally opening the pump pressure ports (12, 13).
  • the invention is not limited to circulation pumps in dishwashers or to centrifugal pumps.
  • 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 in an energy-saving manner. But especially in devices where there is little space for heating and pumps and repair work u. U. must be done quickly, as z. B. is the case with devices in the laboratory or hospital area.

Landscapes

  • 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

Beschreibungdescription
Umwälzpumpe, insbesondere für ein wasserführendes HaushaltgerätCirculation pump, in particular for a water-bearing household appliance
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-carrying household appliance, such as a dishwasher or washing machine, which is equipped with a rinsing container and an electrical heating device for heating the rinsing water, with a pump housing flanged to the motor housing of the pump with suction and pressure ports for those to be circulated and closed heating liquid, safety devices such as thermal switches, pressure switches or the like being provided for monitoring the liquid to be conveyed in the water circuit.
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 Kreis- lauf 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 elektri- sehen Anschlüsse notwendig.In the case of water-bearing household appliances, in particular in dishwashers, it is generally known to arrange the electrical heating device used for heating the washing liquid within the washing container, preferably in the trough-shaped bottom part above or below the filter screens. When washing dishes, the rinsing water heated by the tubular heating element is then sucked in by the device's own circulation pump and circulated over the dishes. For reasons of simple assembly, maintenance and for reasons of space, the circulation pump, which is generally designed as a centrifugal pump, is installed in an accessible manner outside the flushing tank in the base area of the household appliance. Due to the spatial separation of the pump and heating device, special care must be taken with regard to the tightness and the electrical safety of the lines and electrical connections leading out of the flushing tank.
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 Haus- haltgerätes 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 washing liquid of a dishwasher (cf. DE 29 38 883 C2), an electrical resistance heater (tubular heater) is arranged on the outside of the metal part of the motor housing of the circulation pump, the waterproof motor housing together with the flanged pump housing in the washing container of the house. Holding device is housed and immersed in the washing liquid to be heated. The connection lines of the electric heater are led out together with the lines of the motor from the pump housing and the flushing tank in a liquid-tight manner. In this state of the art, a further variant is also provided, according to which the heater is arranged on the inside in the motor housing. However, the pump motor must be protected from excessive heat. On the other hand, the heater can only indirectly heat the rinsing liquid to be circulated via the metal motor housing, which is why an increased heating power must be used. The efficiency of the heating is also reduced by the heat which can only be transferred indirectly to the rinsing water. The combination of heating and pump into one In the case of a heating or pump defect, the inseparable functional unit requires the complete replacement of the motor or pump, including the heating.
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 heating device for heating the rinsing liquid outside the rinsing tank, away from the pump, laterally between the rinsing tank outer wall and the outer housing, a continuous-flow heater being used as the heating system (cf. EP 0 591 774 A1). The separate arrangement of the heater outside of the washing compartment is advantageous for servicing, however, the covering outer wall of the device must be dismantled in such a design if the heater must be replaced or repaired in the event of damage.
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 Servivefall leicht zugänglich sowie einfach austauschbar ist.The invention poses the problem of creating a heating system for rinsing liquid combined with a circulation pump, which works effectively and saves energy, takes up little installation space and is easily accessible and easily exchangeable for servicing purposes.
Erfindungsgemäß wird dieses Problem durch die im Patentanspruch 1 angegebenen Merkmalen gelöst.According to the invention this problem is solved by the features specified in claim 1.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.Advantageous refinements and developments of the invention result from the 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 Beheizungssy- stem 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 Pumpengehäuse 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 water flow of the pump, preferably in the pump housing, enables rapid, lossless transfer of the heat to the circulating rinsing liquid. The heating system works very effectively and saves energy. Furthermore, the flat and space-saving design of the tubular heater in the form of a spiral or solenoid coil takes up little installation space. In the event of service, the heating is also advantageously easily accessible and easily replaceable separately from the pump. Due to the design of the heating device on the pump housing, constructive measures for the pump drive or on 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 vorprüfbare Baueinheit komplettiert werden.The combination of the heating device with the circulation pump advantageously creates the possibility of also releasably arranging the safety devices required for the water circuit of the household appliance, such as thermal switches, pressure switches, turbidity sensors or the like, also preferably detachably on the pump housing by means of plug-in or snap-in connections. In this way, a pre-testable unit can be completed.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen rein schematisch dargestellt und nachfolgend näher beschrieben. Es zeigen:Exemplary embodiments of the invention are shown purely schematically in the drawings and are described in more detail below. Show it:
Figur 1 den Wasserweg in einer Geschirrspülmaschine in vereinfachter Form,FIG. 1 shows the water path in a dishwasher in a simplified form,
Figur 2 eine Umwälzpumpe der Geschirrspülmaschine mit geöffnetem Pumpengehäuse und eingebauter Heizeinrichtung für die Spülflüssigkeit, in perspektivischer Ansicht,FIG. 2 shows a circulation pump of the dishwasher with an open pump housing and built-in heating device for the washing liquid, in a perspective view,
Figur 3 einen Deckel des Pumpengehäuses der Umwälzpumpe in Kombination mit einer weiteren Ausführungsform der Heizeinrichtung nach der Erfindung, im Längs- schnitt,3 shows a cover of the pump housing of the circulation pump in combination with a further embodiment of the heating device according to the invention, in longitudinal section,
Figur 4 den mit der Heizeinrichtung kombinierten Pumpengehäusedeckel in der Seitenansicht.4 shows the pump housing cover combined with the heating device in a 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 washing container (2) with two crockery baskets (3, 4) arranged one above the other, a cutlery drawer (5) being provided in a third washing level above the upper crockery basket (4). The crockery baskets (3, 4) and the cutlery drawer (5) are guided in a known manner in the washing compartment (2) on runners (6). Instead of the cutlery drawer (5), a cutlery basket can also be used separately in one of the crockery baskets (3, 4).
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 Krei- seipumpe 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) there is a spray device (7, 8) assigned to this basket for the crockery to be cleaned. A third spray device (9) above the cutlery drawer (5) is installed on the washing compartment cover (10). The spray devices (7 to 9), which are designed as rotating spray arms, are supplied with flushing liquid by a common circulating pump (11) which is mounted in the device housing below the flushing container (2). For this purpose, the circulation pump (11) has pressure ports (12, 13) on its pump housing (14), to which the spray arms are connected. With (15) an intake port of the circulation pump (11) is designated, with which the washing liquid for the liquid circulation is sucked out of the washing container. The circulation pump (11) in the exemplary embodiment is preferably designed as a circular pump with a pump impeller (16) arranged in the pump housing (14) for the transport of the rinsing liquid. However, other types of pumps can also 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 (1 1 ) ist mit der elek- frischen 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) zwi- sehen 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).2 is in the pump (11) used for the sake of clarity and to illustrate the combination of a flushing water heater (17) with the pump housing (14) of the pump housing cover (23), see FIG. Fig. 3 u. 4, has been omitted. The circulation pump (1 1) arranged outside the rinsing tank (2) can be connected to the fresh heating device (17) combined to form a pre-testable unit, but the combined building modules (pump 11, heater 17) are separately replaceable or detachable. The heating device (17) is arranged in the water flow of the circulating pump (11) on the pump housing (14), preferably inside the pump housing (14) between the suction connection (15) and the pressure connection (12, 13). This arrangement is advantageous for an efficient and efficient heating device (17) that works with high efficiency without heat loss. The heating device (17) works as a tubular heating element (18) around which the flushing liquid flows.
Der Rohrheizkörper (18) der Heizeinrichtung (17) ist gemäß Fig. 2 umlaufend ringförmig vor- zugsweise 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 topf- förmige Gehäusewand des Pumpengehäuses (14) durchgreifen. Zweckmäßig ist die Heizein- richtung (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.2, the tubular heating element (18) of the heating device (17) is wound in an annular manner, preferably in the form of a wound solenoid, and concentrically surrounds the pump impeller (16). A tubular heating element (18) of the heating device (17) which is wound in this way is advantageously mounted in the pump housing (14) on the pump motor-side housing half (24) of the pump housing (14), the electrical connections (22) isolating and liquid-tight the pot-shaped housing wall of the pump housing (14) reach through. The heating device (17) is expediently mounted on the circulation pump (11) at a distance from the walls of the pump housing (14). The pump housing (14) in turn is detachably mounted on the motor housing (19) of the circulation 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 Pumpengehäu- ses (14) bzw. des Deckels (23) an der Pumpe (11 ) montiert (sh. Fig. 4).Another advantageous arrangement is the releasable attachment of the heating device (17) in the pump housing (14) on the removable pump housing cover (23) of the circulating pump (11) according to FIGS. 3 and 4. A tubular heater (18 ') is also used, which, however, as Spiral is formed, which is wound around the intake manifold (15) in the cover plane. When the cover (23) is mounted, the spiral then lies in front of the covered pump impeller (16) so that it can rotate freely. In this construction too, the heating device (17) is mounted on the pump (11) by inserting intermediate webs (25) at a distance from the walls of the pump housing (14) or the cover (23) (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 heating device (17) arranged in the pump housing (14) with the exposed, flushed tubular heating element (18, 18 ') forms, with the surrounding pump housing (14), a continuous-flow heater of optimum power utilization and with high efficiency, since all heat in the rinsing water circulation directly onto the rinsing liquid 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 development of the invention, not shown, the heating device (17) as a continuous flow heater could also be formed separately on the outside of the pump housing (14) as a coupling piece which can be connected to a connecting or pressure connection (12, 13) of the circulation pump (11) and which can preferably be plugged onto the connection , The water connection connections for the heating device (17) and / or their electrical line connections (22) likewise are designed to be detachable from one another. It is also possible to design part of the pump housing (14) itself as a heating device (17) and to detach this separate housing part with the rest of the pump housing, for. B. liquid-tight by screwing.
Zweckmäßig ist es ferner, die den Spülwasserumlauf überwachenden bzw. kontrollierenden üb- liehen 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 fix the conventional components or safety devices, such as thermal switches (20), pressure switches (21), turbidity sensors, etc., which monitor or control the rinsing water circulation, also releasably in a liquid-tight manner on the pump housing (14), as is shown, for example, in FIG. 2 is shown. The security devices could preferably be attached in a plug-in or snap-in construction, so that a structural unit that can be completely pre-tested is created. It is also conceivable to provide at least one valve device on the pump housing (14) for shutting off or optionally opening the pump pressure ports (12, 13).
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 circulation pumps in dishwashers or to centrifugal pumps. 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 in an energy-saving manner. But especially in devices where there is little space for heating and pumps and repair work u. U. must be done quickly, as z. B. is the case with devices in the laboratory or hospital area.

Claims

Patentansprüche claims
1. Umwälzpumpe, insbesondere für ein wasserführendes Haushaltgerät, wie Geschirrspülmaschine oder Waschmaschine, welche mit einem Spülbehälter und einer elektrischen Heizein- richtung 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, dadurch gekennzeichnet, daß die Heizungeinrichtung lösbar im Wasserlauf der Pumpe (11) am Pumpengehäuse (14) angeordnet ist.1. Circulation pump, in particular for a water-bearing household appliance, such as a dishwasher or washing machine, which is equipped with a rinsing container and an electrical heating device for heating the rinsing water, with a pump housing flanged to the motor housing of the pump with suction and pressure ports for those to be circulated and closed heating liquid, safety devices such as thermal switches, pressure switches or the like being provided for monitoring the liquid to be conveyed in the water circuit, characterized in that the heating device is arranged detachably in the water flow of the pump (11) on the pump housing (14).
2. Umwälzpumpe nach Anspruch 1 , dadurch gekennzeichnet, daß die Heizeinrichtung (17) innerhalb des Pumpengehäuses (14) im Wasserlauf zwischen Ansaug- und Druckstutzen (15; 12, 13) der Pumpe (11 ) angeordnet ist.2. Circulation pump according to claim 1, characterized in that the heating device (17) within the pump housing (14) in the water flow between the suction and pressure ports (15; 12, 13) of the pump (11) is arranged.
3. Umwälzpumpe nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Heizeinrichtung (17) im Pumpengehäuse (14) am abnehmbaren Pumpengehäusedek- kel (23) der Umwälzpumpe (11 ) lösbar befestigt ist.3. Circulation pump according to claim 1 and 2, characterized in that the heating device (17) in the pump housing (14) on the removable Pumpengehäusedek- kel (23) of the circulation pump (11) is releasably attached.
4. Umwälzpumpe nach Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Heizeinrichtung (17) im Pumpengehäuse (14) an der pumpenmotorseitigen Gehäusehälfte (24) des Pumpengehäuses (14) montiert ist.4. Circulating pump according to claims 1 and 2, characterized in that the heating device (17) in the pump housing (14) on the pump motor side housing half (24) of the pump housing (14) is mounted.
5. Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Heizeinrichtung (17) als von der Spülflüssigkeit umspülter Rohrheizkörper (18; 18') ausgebildet ist.5. Circulation pump according to one or more of claims 1 to 4, characterized in that the heating device (17) is designed as a tubular heater (18; 18 ') which is flushed with the washing liquid.
6. Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Rohrheizkörper (18; 18') als Spirale oder umlaufend ringförmig vorzugsweise in Art einer gewickelte Zylinderspule gewunden ist. 6. Circulation pump according to one or more of claims 1 to 5, characterized in that the tubular heater (18; 18 ') is wound as a spiral or circumferential ring, preferably in the manner of a wound solenoid.
7. Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Rohrheizkörper (18; 18') mit dem ihn umgebenden Pumpengehäuse (14) einen Durchlauferhitzer bildet.7. Circulation pump according to one or more of claims 1 to 6, characterized in that the tubular heater (18; 18 ') with the surrounding pump housing (14) forms a water heater.
8. Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Heizeinrichtung (17) als separat montierbarer Teil des Pumpengehäuses (14) ausgebildet ist.8. Circulation pump according to one or more of claims 1 to 7, characterized in that the heating device (17) is designed as a separately mountable part of the pump housing (14).
9. Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Heizeinrichtung (17) als ein mit den Anschluß- oder Druckstutzen (12, 13) der Pumpe verbindbares vorzugsweise aufsteckbares Kupplungsstück ausgebildet ist.9. Circulation pump according to one or more of claims 1 to 8, characterized in that the heating device (17) is designed as a preferably pluggable coupling piece which can be connected to the connecting or pressure connection (12, 13) of the pump.
10.Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Wasseranschlußverbindungen für die Heizeinrichtung (17) und/oder die elektrischen Leitungsanschlüsse (19) der Heizeinrichtung (17) als steckbare Rastverbindungen oder dergl. ausgebildet sind.10. Circulation pump according to one or more of claims 1 to 9, characterized in that the water connection connections for the heating device (17) and / or the electrical line connections (19) of the heating device (17) are designed as pluggable snap-in connections or the like.
11. Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Sicherheitseinrichtungen, wie Thermoschalter (20), Druckschalter (21), Trübungssensoren oder dergl. am Pumpengehäuse (14) lösbar vorzugsweise in Steckbauweise angeordnet sind, und daß die Pumpe (1 1 ) bei einer Wasch- oder Geschirrspülmaschine außerhalb des Spülbehälters (2) angeordnet ist.11. Circulating pump according to one or more of claims 1 to 10, characterized in that the safety devices, such as thermal switches (20), pressure switches (21), turbidity sensors or the like. On the pump housing (14) are preferably detachably arranged in plug-in construction, and that Pump (1 1) is arranged in a washing machine or dishwasher outside the washing container (2).
12. Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 11 , dadurch gekennzeichnet, daß am Pumpengehäuse (14) ebenfalls austauschbar mindestens eine Ventileinrichtung zum Absperren oder wahlweisen Öffnen der Pumpendruckstutzen (12, 13) angeordnet ist.12. Circulation pump according to one or more of claims 1 to 11, characterized in that the pump housing (14) is also interchangeably arranged at least one valve device for shutting off or optionally opening the pump pressure nozzle (12, 13).
13. Umwälzpumpe nach einem oder mehreren der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Heizeinπchtung (17) mit Abstand (Zwischenstege 22) zu den Wandungen des Pumpengehäuses (14) an der Umwälzpumpe (11 ) montiert ist. 13. Circulating pump according to one or more of claims 1 to 12, characterized in that the Heizeinπchtung (17) is mounted at a distance (intermediate webs 22) to the walls of the pump housing (14) on the circulating pump (11).
14. Umwälzpumpe nach Anspruch 1 und einem oder mehreren der Ansprüche 5 bis 13, dadurch gekennzeichnet, daß die Heizeinrichtung (17) außen am Pumpengehäuse (14) angeordnet ist. 14. Circulating pump according to claim 1 and one or more of claims 5 to 13, characterized in that the heating device (17) is arranged on the outside of 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)

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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

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

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EP (1) EP1047334B2 (en)
AT (1) ATE270521T1 (en)
DE (2) DE19852569A1 (en)
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WO (1) WO2000028878A1 (en)

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DE19852569A1 (en) 2000-05-18
DE59909911D1 (en) 2004-08-12
EP1047334B2 (en) 2007-06-06
WO2000028878A1 (en) 2000-05-25
PL192963B1 (en) 2006-12-29
PL341002A1 (en) 2001-03-12
EP1047334B1 (en) 2004-07-07
ATE270521T1 (en) 2004-07-15

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