EP0591774B1 - Dishwasher with continuous flow-heater - Google Patents

Dishwasher with continuous flow-heater Download PDF

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Publication number
EP0591774B1
EP0591774B1 EP93115366A EP93115366A EP0591774B1 EP 0591774 B1 EP0591774 B1 EP 0591774B1 EP 93115366 A EP93115366 A EP 93115366A EP 93115366 A EP93115366 A EP 93115366A EP 0591774 B1 EP0591774 B1 EP 0591774B1
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EP
European Patent Office
Prior art keywords
dishwasher
heater
flow
accordance
wash cabinet
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Expired - Lifetime
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EP93115366A
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German (de)
French (fr)
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EP0591774A1 (en
Inventor
Ulrich Hettenhausen
Wilfried Hüttemann
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Miele und Cie KG
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Miele und Cie KG
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply

Definitions

  • the object of the invention relates to a dishwasher with a washing container and a plurality of spray arms in the upper and lower washing levels, which are fed by the circulating washing water of an upstream circulating pump, an electric instantaneous water heater being provided as heating device for heating the circulating washing liquid, which is located outside the washing container between the latter and an adjacent outer housing wall of the device is arranged in the line path to the upper flushing level in the flushing water circulation line, the instantaneous water heater being provided with flushing water connections for connection to the circulation line and with separately connectable line connections for electrical tubular heating elements
  • Such a dishwasher with a water heater is known for example from DE-AS 1 226 248.
  • a separate pipe intermediate piece is formed as a continuous-flow heater in the conduit path between the upper spray arm and the circulation pump in the region of a non-insulated spray container side wall, which accommodates a U-shaped tubular heating element in its interior.
  • the tubular heater is in direct contact with the rinsing liquid to be heated and therefore on the one hand represents an obstacle to the flow of the rinsing liquid to be circulated and on the other hand has the disadvantage of a high lime build-up in washing programs with temperatures above 55 ° Celsius, which disturbs the heat transfer and accepts a considerable loss in performance must become. The result is longer program times for dishwashing.
  • the continuous-flow heater is part of the pipe system for the rinse water circulation, the heating device in the form of a tubular heater being wound on the outside of a piece of pipe and connected to it in a heat-conducting manner by soldering or welding.
  • the short pipe section branching from the base of the washing container is used as the pipe section, which is connected on the suction side to the circulating pump and can only be checked from the underside of the dishwasher.
  • an electrical instantaneous water heater is also known, which is designed as an elongated continuous tube, electrically heated from the outside via one or more separate heating elements, for the liquid to be heated on a straight support component.
  • the radiators are arranged parallel to the longitudinal direction of the flow pipe on the extruded profile support part, the flow pipe being provided at the end with water connections and the radiators with separately connectable electrical line connections.
  • a similar instantaneous water heater is also known from DE-A-2218796.
  • Such water heaters are used in particular in coffee machines or water heaters and are distinguished by simple manufacturing processes and good heat conduction between the carrier material, the radiators and the flow pipe.
  • Such instantaneous water heaters can also be built flat.
  • coffee machines or water heaters are small devices that are usually not tied to specified housing dimensions, such as dishwashers that can be integrated in kitchen cabinet rows, since these small devices are predominantly installed or set up separately or are used in a location-changing manner.
  • the flat instantaneous water heaters used in these devices require particularly effective heat insulation on the outside due to their good heat conduction of the extruded profiles used, so that adjacent housing wall parts of the device are not heated to an unacceptably high degree. In practice, this fact is countered by maintaining a larger distance between the instantaneous water heater and the adjacent housing wall, with the gap formed, if necessary, additionally is still filled with the insulation material.
  • such measures require a direct influence on the shape of the housing and on its dimensions.
  • the invention has for its object to provide a dishwasher in which a flow heater arranged outside the washing container between the washing container and an adjacent outer housing wall of the dishwasher can be arranged in a simple construction with an externally heated flow tube, and can be mounted and operated in an energy-saving manner, and for In the event of a repair, an easy way to replace the instantaneous water heater and also to adapt the heater in terms of performance to different connection values can be implemented without problems.
  • the arrangement of the instantaneous water heater on the outside of the rinsing tank in a straight line to the upper spray arms and its parallel alignment to the rinsing tank wall creates additional installation space for electrical or mechanical components in the base area of the device, which could serve to provide additional device safety.
  • the detachable attachment of the instantaneous water heater to a flushing tank wall in heat-conducting contact with the flushing tank offers, in addition to the simple mounting of the heater, the guarantee for energy-saving operation because the radiant heat emitted by the heater can also be used in a sensible manner.
  • the receiving space for the water heater extends parallel to the wall of the washing container, this space can be reached directly with the cover and / or a side panel of the device removed.
  • the simplest way of assembly is to connect the instantaneous water heater to the device separately and detachably on a side wall of the washing tub.
  • the design of the water- and current-carrying connections of the instantaneous water heater in the form of plug-in connections enables a quick and easy replacement of the heating when necessary, whereby, if necessary, a certain heated instantaneous tube length can also be used. It is also easily possible to change the wiring of the tubular heating element directly on the built-in instantaneous water heater or to disconnect or connect the tubular heating element from the mains in order to realize other types of performance.
  • An ideal heat transfer between the tubular heating elements and the flow pipe for the rinsing liquid is achieved by the support material aluminum or brass, which is also advantageous in terms of production technology, of the extruded part. This material can also be easily pressed with the aforementioned parts in a positive and non-positive manner.
  • the used according to an advantageous development of the invention stainless material, for. B. Cr-Ni steel, for the flow pipe counteracts limescale deposits on the pipe inner walls.
  • a dishwasher designated by (1) in Fig. 1 has a washing container (2) and a plurality of spray arms (3, 4, 5) between dishes (6, 7, 8) in different lower and upper washing levels.
  • the spray arms (3, 4, 5) are fed by the circulating rinse water of an upstream circulation pump (9).
  • an electric instantaneous water heater (10) is provided as a heating device in the circulation pump circuit outside the rinsing container (2) in the line path from the circulation pump (9) only to the upper spray arms (4, 5) in the rinsing water circulation line.
  • an electric instantaneous water heater 10 is provided as a heating device in the circulation pump circuit outside the rinsing container (2) in the line path from the circulation pump (9) only to the upper spray arms (4, 5) in the rinsing water circulation line.
  • This room could e.g. B. by a cutout in the rinsing tank insulation (15) or by omitting the insulation in this area.
  • the flow heater (10) installed in this area is designed as a flow pipe (17) which is electrically heated from the outside and which is predominantly elongated and straight in shape.
  • the flow heater (10) is an elongated flow pipe (17), which is electrically heated from the outside via one or more separate tubular heating elements (18), for the washing liquid to be heated, on a straight support component (2) aligned parallel to a washing container wall (2a). 11) trained.
  • the tubular heating elements (18) are also arranged parallel to the longitudinal direction of the flow tube (17) on this support component (11).
  • the flow pipe (17) is provided at the end with rinsing water connections (19) for detachable connection to the rinsing water circulation line and the tubular heaters (18) have separately connectable electrical line connections (20), which are slightly bent at the end of the support component (11) and thus Do not heat the flow pipe ends (21) and keep them free for installation in the flushing water circulation line.
  • the carrier component (11) is an extruded part which has a through bore (24) running in the longitudinal direction of the pressed part for the positive reception and non-positive mounting of the separate flow tube (17) for the washing liquid to be heated.
  • the flow tube (17) is pressed into this through bore (24), the inner wall of the bore for heat conduction lying tightly against the outer tube jacket.
  • the flow tube (17) is heated on the outside by two tubular heating elements (18), each of which is provided with separately connectable electrical line connections (20) for realizing predetermined or also selectable connection values (connecting bridge 22), the tubular heating elements (18) outside the flow tube (17 ) are pressed in the holes (25) of the extruded part that run parallel to the through hole (24). Additional bores (25) for additional tubular heating elements (18) can also be provided in the extruded part.
  • the instantaneous heater (10) provided between the washing compartment (2) and the adjacent outer housing wall (13) of the dishwasher is in the receiving space (12) arranged interchangeably, for which purpose the continuous tube (17) in each case has unheated tube ends (21) which are extended beyond the extrusion and which are provided with the detachable rinsing water connections (19).
  • the continuous tube (17) in each case has unheated tube ends (21) which are extended beyond the extrusion and which are provided with the detachable rinsing water connections (19).
  • the plastic connection of the spray arm line and the rubber connecting hose to the circulation pump (9) can be easily attached and fix.
  • the advantageously used non-rusting material for the continuous pipe (17) counteracts limescale deposits on the inside walls of the pipe, so that no loss of performance occurs.
  • the flushing water connections (19) and / or the electrical line connections (20) of the instantaneous water heater (10) are designed as pluggable or screwable connections. This also enables simple assembly and disassembly of the instantaneous water heater (10) with the flushing water circulation line.
  • Placing the instantaneous water heater (10) preferably on a side wall of the rinse tank (2a), see (Fig. 3) in the straight part of the spray arm supply line (16) or rinse water circulation line in the dishwasher housing (14) offers the simplest installation route if the adjacent outer housing wall ( 13) is detachably connected to the device at the same time.
  • the carrier component (11) consists of a highly thermally conductive material, preferably aluminum, brass or metal alloys of this type.
  • An ideal heat transfer between the tubular heating elements (18) and the flow tube (17) for the rinsing liquid is achieved due to the aluminum or brass material, which is also advantageous in terms of production technology. This material can also be easily connected to the flow tube (17) and to the radiators in a positive and non-positive manner.
  • the length of the flow tube (17) is at a conventional heating power of the tubular heater (18) of z. B. 3 kW - this corresponds, for example, to the performance of tubular radiators (18) which are known per se and are installed inside the washing compartment (2) - at least 350 mm in length for the part to be heated (extruded part length).
  • the length can be increased to 600 mm for any power reserves or for selectable different outputs.
  • the arrangement of the instantaneous water heater (10) behind the lower spray arm (3) in the preferably straight line path to the upper spray arms (4, 5) between the washing container (2) and the outer housing creates space in the lower device area for additional safety devices, such as leakage water trays, floats and The like. And avoids installation problems for the circulation pump (9), the softening device (E), the fresh water connection (F) and for the drain pump (L); the drain (A) including any pressure switches (D) and valves (V).
  • the already mentioned receiving space (12) in the dishwasher housing (14) according to FIG. 2 can preferably be designed as an assembly chamber for the continuous-flow heater (10) that can be reached from above, below or from the side of the dishwasher (1) with the cover or side panel removed.
  • the water heater (10) is thermally insulated and also electrically insulated.
  • the extruded profile part is detachably fastened to a washing compartment wall (2a), preferably to the washing compartment side wall, via a snap-in connection (23).
  • the instantaneous water heater (10) could also be installed on the rear wall of the washing container or on the top of the washing container below the adjacent, also removable outer housing wall (13).
  • the instantaneous water heater (10) is provided with thermostatic devices in a manner not known per se.
  • the instantaneous water heater (10) is releasably arranged in heat-conducting contact on the outside directly on the washing container (2).
  • This indirect rinsing water heating brings about an additional sensible and energy-saving use of the radiant heat of the rinsing water heater, but the heat insulation with respect to the adjacent outer housing wall (13) could still be retained.

Description

Der Gegenstand der Erfindung betrifft eine Geschirrspülmaschine mit einem Spülbehälter und mehreren Sprüharmen in oberen und unteren Spülebenen, die vom umlaufenden Spülwasser einer vorgeschalteten Umwälzpumpe gespeist werden, wobei für die Erwärmung der umzuwälzenden Spülflüssigkeit ein elektrischer Durchlauferhitzer als Heizeinrichtung vorgesehen ist, der außerhalb des Spülbehälters zwischen diesem und einer benachbarten Außengehäusewand des Gerätes im Leitungsweg zur oberen Spülebene in der Spülwasser-Umlaufleitung angeordnet ist, wobei der Durchlauferhitzer mit Spülwasseranschlüssen zur Verbindung mit der Umlaufleitung und mit separat verbindbaren Leitungsanschlüssen elektrischer Rohrheizkörper versehen istThe object of the invention relates to a dishwasher with a washing container and a plurality of spray arms in the upper and lower washing levels, which are fed by the circulating washing water of an upstream circulating pump, an electric instantaneous water heater being provided as heating device for heating the circulating washing liquid, which is located outside the washing container between the latter and an adjacent outer housing wall of the device is arranged in the line path to the upper flushing level in the flushing water circulation line, the instantaneous water heater being provided with flushing water connections for connection to the circulation line and with separately connectable line connections for electrical tubular heating elements

Eine derartige Geschirrspülmaschine mit einem Durchlauferhitzer ist beispielsweise aus der DE-AS 1 226 248 bekannt.Such a dishwasher with a water heater is known for example from DE-AS 1 226 248.

Bei der bekannten Geschirrspülmaschine ist im Leitungsweg zwischen dem oberen Sprüharm und der Umwälzpumpe im Bereich einer nicht isolierten Sprülbehälterseitenwand ein separates Rohrzwischenstück als Durchlauferhitzer ausgebildet, welches in seinem Inneren einen U-förmig gebogenen Rohrheizkörper aufnimmt. Der Rohrheizkörper steht dabei in direktem Kontakt mit der aufzuheizenden Spülflüssigkeit und stellt deswegen einerseits ein Stömungshindernis der umzuwälzenden Spülflüssigkeit dar und besitzt andererseits den Nachteil eines hohen Kalkansatzes bei Spülprogrammen mit Temperaturen über 55° Celsius, wodurch der Wärmeübergang gestört wird und eine erhebliche Leistungseinbuße in Kauf genommen werden muß. Die Folge sind höhere Programmlaufzeiten beim Geschirrspülen. Durch die direkte Kontaktierung zwischen Rohrheizkörper und Spülflüssigkeit ergibt sich ferner der Nachteil, daß sich im Spülwasser-Umlauf befindliche Kleinstspeisereste am Rohrheizkörper festsetzen können und es dadurch zu Zonen mit unterschiedlichen Wärmeübergängen kommen kann. Abgesehen davon bringt die Anordnung eines direkt in einem separaten Durchlaufrohr angeordneten U-förmigen Rohrheizkörpers zusätzliche Abdichtungsprobleme und einen erhöhten Montageaufwand. Desweiteren ist eine Vergrößerung der Heizleistung des Durchlauferhitzers aufgrund des für den Rohrheizkörper vorgegebenen Einbauplatzes im Rohrzwischenstück nicht möglich.In the known dishwasher, a separate pipe intermediate piece is formed as a continuous-flow heater in the conduit path between the upper spray arm and the circulation pump in the region of a non-insulated spray container side wall, which accommodates a U-shaped tubular heating element in its interior. The tubular heater is in direct contact with the rinsing liquid to be heated and therefore on the one hand represents an obstacle to the flow of the rinsing liquid to be circulated and on the other hand has the disadvantage of a high lime build-up in washing programs with temperatures above 55 ° Celsius, which disturbs the heat transfer and accepts a considerable loss in performance must become. The result is longer program times for dishwashing. Due to the direct contact between the tubular heating element and the flushing liquid, there is also the disadvantage that minute feed residues in the flushing water circuit can adhere to the tubular heating element and zones with different heat transfers can thereby occur. Apart from this, the arrangement of a U-shaped tubular heating element arranged directly in a separate flow tube brings additional sealing problems and increased assembly effort. Furthermore, an increase in the heating power of the instantaneous water heater is not possible due to the installation space specified for the tubular heater in the intermediate pipe section.

Bei einer aus dem DE-GM 66 01 550 bekannten Geschirrspülmaschine ist der Durchlauferhitzer Teil des Rohrsystems für den Spülwasserumlauf, wobei die Heizeinrichtung in Form eines Rohrheizkörpers außen auf ein Rohrstück gewickelt und mit diesem durch Löten oder Schweißen wärmeleitend verbunden ist. Als Rohrstück ist das vom Spülbehältergrund abzweigende kurze Leitungsstück benutzt, das saugseitig an die Umwälzpumpe angeschaltet ist und nur von der Unterseite der Spülmaschine aus kontrolliert werden kann. Ein derartiger Aufbau und Einbau eines Durchlauferhitzers im unteren Gerätebereich bringt in einem auf Normmaße zu haltenden Spülmaschinengehäuse regelmäßig Platzprobleme, da nur Durchlauferhitzer in einer bestimmten Dimensionierung hinsichtlich Länge bzw. Umfang installiert werden können. Deshalb kann es vorkommen, daß die geforderte Heizleistung des Durchlauferhitzers aufgrund des geringen Einbauplatzes oftmals nicht oder nur schwer realisiert werden kann. Eine Unterdimensionierung der Heizung muß daher durch längere Programmeinschaltzeiten für die Spülwassererwärmung kompensiert werden, wodurch sich auch die Laufzeit des Spülprogramms erhöht. Darüber hinaus ist eine Heizeinrichtung im unteren Gerätebereich ungünstig zu installieren und zu reparieren bzw. zu überprüfen.In a dishwasher known from DE-GM 66 01 550, the continuous-flow heater is part of the pipe system for the rinse water circulation, the heating device in the form of a tubular heater being wound on the outside of a piece of pipe and connected to it in a heat-conducting manner by soldering or welding. The short pipe section branching from the base of the washing container is used as the pipe section, which is connected on the suction side to the circulating pump and can only be checked from the underside of the dishwasher. Such a construction and installation of a water heater in the lower device area regularly causes space problems in a dishwasher housing which is to be kept to standard dimensions, since only water heaters of a certain dimension can be installed with regard to length or circumference. Therefore, it can happen that the required heating capacity of the instantaneous water heater can often not be achieved or only with difficulty due to the small installation space. Undersizing of the heating must therefore be compensated for by longer program switch-on times for rinsing water heating, which also increases the running time of the rinsing program. In addition, a heating device in the lower area of the device is inconvenient to install and to repair or to check.

Aus der DE-A-2454920 ist ferner ein elektrischer Durchlauferhitzer bekannt, der als ein von außen über ein oder mehrere separate Heizkörper elektrisch beheiztes langgestrecktes Durchlaufrohr für die zu erwärmende Flüssigkeit auf einem geraden Trägerbauteil ausgebildet ist. Bei diesem Durchlaufrohr sind die Heizkörper parallel zur Längsrichtung des Durchlaufrohres auf dem Strangprofil-Trägerteil angeordnet, wobei das Durchlaufrohr endseitig mit Wasseranschlüssen und die Heizkörper mit separat verbindbaren elektrischen Leitungsanschlüssen versehen sind. Ein ähnlicher Durchlauferhitzer ist auch aus der DE-A-2218796 bekannt. Solche Durchlauferhitzer finden insbesondere bei Kaffeemaschinen oder Warmwasserbereitern Verwendung und zeichnen sich durch einfache Herstellverfahren sowie durch eine gute Wärmeleitung zwischen dem Trägermaterial, den Heizkörpern und dem Durchlaufrohr aus. Auch können solche Durchlauferhitzer flach gebaut werden. Kaffeemaschinen oder Warmwasserbereiter sind jedoch kleine Geräte, die in der Regel nicht an vorgegebene Gehäuseabmessungen gebunden sind, wie beispielsweise in Küchenschrankzeilen integrierfähige Geschirrspülmaschinen, da diese Kleingeräte überwiegend separat installiert bzw. aufgestellt sind, oder auch ortsveränderlich benutzt werden. Die in diesen Geräten eingesetzten flachen Durchlauferhitzer verlangen jedoch aufgrund ihrer guten Wärmeleitung der verwendeten Strangprofile außen eine besonders wirksame Wärmeisolation, damit benachbarte Gehäusewandteile des Gerätes nicht unzulässig stark erwärmt werden. Diesem Umstand wird in der Praxis dadurch begegnet, daß ein größerer Abstand zwischen Duchlauferhitzer und der angrenzenden Gehäusewand eingehalten wird, wobei der gebildete Zwischenraum ggf. zusätzlich noch mit dem Isolationsmaterial ausgefüllt wird. Solche Maßnahmen verlangen jedoch eine direkte Einflußnahme auf die Gehäuseform sowie auf deren Abmessungen.From DE-A-2454920 an electrical instantaneous water heater is also known, which is designed as an elongated continuous tube, electrically heated from the outside via one or more separate heating elements, for the liquid to be heated on a straight support component. In this flow pipe, the radiators are arranged parallel to the longitudinal direction of the flow pipe on the extruded profile support part, the flow pipe being provided at the end with water connections and the radiators with separately connectable electrical line connections. A similar instantaneous water heater is also known from DE-A-2218796. Such water heaters are used in particular in coffee machines or water heaters and are distinguished by simple manufacturing processes and good heat conduction between the carrier material, the radiators and the flow pipe. Such instantaneous water heaters can also be built flat. However, coffee machines or water heaters are small devices that are usually not tied to specified housing dimensions, such as dishwashers that can be integrated in kitchen cabinet rows, since these small devices are predominantly installed or set up separately or are used in a location-changing manner. However, the flat instantaneous water heaters used in these devices require particularly effective heat insulation on the outside due to their good heat conduction of the extruded profiles used, so that adjacent housing wall parts of the device are not heated to an unacceptably high degree. In practice, this fact is countered by maintaining a larger distance between the instantaneous water heater and the adjacent housing wall, with the gap formed, if necessary, additionally is still filled with the insulation material. However, such measures require a direct influence on the shape of the housing and on its dimensions.

Der Erfindung liegt die Aufgabe zugrunde, eine Geschirrspülmaschine zu schaffen, bei der ein außerhalb des Spülbehälters zwischen dem Spülbehälter und einer benachbarten Außengehäusewand der Spülmaschine angeordneter Durchlauferhitzer in einfacher Konstruktion mit außen beheiztem Durchlaufrohr platzsparend angeordnet sowie montiert und energiesparend betrieben werden kann, und wobei für den Reparaturfall eine einfache Möglichkeit zum Austausch des Durchlauferhitzers sowie auch eine leistungsmäßige Anpassung des Erhitzers an unterschiedliche Anschlußwerte problemlos realisierbar ist.The invention has for its object to provide a dishwasher in which a flow heater arranged outside the washing container between the washing container and an adjacent outer housing wall of the dishwasher can be arranged in a simple construction with an externally heated flow tube, and can be mounted and operated in an energy-saving manner, and for In the event of a repair, an easy way to replace the instantaneous water heater and also to adapt the heater in terms of performance to different connection values can be implemented without problems.

Ausgehend von einer Geschirrspülmaschine der eingangs genannten Art wird die Aufgabe erfindungsgemäß gelöst durch die Merkmale des Anspruchs 1, wobei vorteilhafte Weiterbildungen der Erfindung den Unteransprüchen zu entnehmen sind.Starting from a dishwasher of the type mentioned in the introduction, the object is achieved according to the invention by the features of claim 1, advantageous developments of the invention being apparent from the subclaims.

Die Anordnung des Durchlauferhitzers außen am Spülbehälter im geraden Leitungsweg zu den oberen Sprüharmen und dessen parallele Ausrichtung zur Spülbehälterwand schafft im Sockelbereich des Gerätes zusätzlichen Einbauplatz für elektrische oder mechanische Bauteile, welche der zusätzlichen Gerätesicherheit dienen könnte. Die Unterbringung des Durchlauferhitzers mit seinem Trägerbauteil und den elektrischen Rohrheizkörpern in einem kanalähnlich gestalteten Aufnahmeraum des Spülmaschinengehäuses, bei dem nach einem Merkmal der Erfindung die vorhandene Spülbehälterisolierung vorteilhaft ausgebildet wird, definiert einen räumlich klar abgegrenzten Montageplatz für den Durchlauferhit - zer, der im Reparaturfall bequem erreichbar ist.The arrangement of the instantaneous water heater on the outside of the rinsing tank in a straight line to the upper spray arms and its parallel alignment to the rinsing tank wall creates additional installation space for electrical or mechanical components in the base area of the device, which could serve to provide additional device safety. The placement of the instantaneous water heater with its support component and the electric tubular heaters in a channel-like receiving space of the dishwasher housing, in which the existing washing container insulation is advantageously designed according to a feature of the invention, defines a spatially clearly defined assembly space for the instantaneous water heater, which is easily accessible in the event of a repair is.

Die lösbare Befestigung des Durchlauferhitzers an einer Spülbehälterwand in wärmeleitendem Kontakt zum Spülbehälter bietet neben der einfachen Montage der Heizung die Gewähr für einen energiesparenden Betrieb, weil auch die von der Heizung ausgehende Strahlungswärme sinnvoll ausgenutzt werden kann. Dadurch, daß sich der Aufnahmeraum für den Durchlauferhitzer parallel zur Spülbehälterwand erstreckt, kann einfach bei abgenommenem Deckel und/oder einer Seitenverkleidung des Gerätes dieser Raum unmittelbar erreicht werden. Der einfachste Montageweg ist der, den Durchlauferhitzer an einer Spülbehälterseitenwand separat lösbar mit dem Gerät zu verbinden. Die Ausbildung der wasser- und stromführenden Anschlüsse des Durchlauferhitzers in Form steckbarer Verbindungen ermöglicht einen schnellen und einfachen Austausch der Heizung im Bedarfsfall, wobei ggf. auch auf eine bestimmte beheizbare Durchlaufrohlänge zurückgegriffen werden kann. Ebenso ist es einfach möglich, direkt am eingebauten Durchlauferhitzer die Verdrahtung der Rohrheizkörper zu ändern oder Rohrheizkörper vom Leitungsnetz zu trennen oder zuzuschalten, um andere Leistungstypen zu realisieren. Durch den in Weiterbildung der Erfindung auch fertigungstechnisch vorteilhaften Trägerwerkstoff Aluminium oder Messing des Strangpreßteils wird ein idealer Wärmeübergang zwischen den Rohrheizkörpern und dem Durchlaufrohr für die Spülflüssigkeit erreicht. Dieser Werkstoff läßt sich außerdem einfach mit den vorgenannten Teilen form- und kraftschlüssig verpressen. Der gemäß einer vorteilhaften Weiterbildung der Erfindung eingesetzte nicht rostende Werkstoff, z. B. Cr-Ni-Stahl, für das Durchlaufrohr wirkt einem Kalkabsatz an den Rohrinnenwandungen entgegen.The detachable attachment of the instantaneous water heater to a flushing tank wall in heat-conducting contact with the flushing tank offers, in addition to the simple mounting of the heater, the guarantee for energy-saving operation because the radiant heat emitted by the heater can also be used in a sensible manner. Characterized in that the receiving space for the water heater extends parallel to the wall of the washing container, this space can be reached directly with the cover and / or a side panel of the device removed. The simplest way of assembly is to connect the instantaneous water heater to the device separately and detachably on a side wall of the washing tub. The design of the water- and current-carrying connections of the instantaneous water heater in the form of plug-in connections enables a quick and easy replacement of the heating when necessary, whereby, if necessary, a certain heated instantaneous tube length can also be used. It is also easily possible to change the wiring of the tubular heating element directly on the built-in instantaneous water heater or to disconnect or connect the tubular heating element from the mains in order to realize other types of performance. An ideal heat transfer between the tubular heating elements and the flow pipe for the rinsing liquid is achieved by the support material aluminum or brass, which is also advantageous in terms of production technology, of the extruded part. This material can also be easily pressed with the aforementioned parts in a positive and non-positive manner. The used according to an advantageous development of the invention stainless material, for. B. Cr-Ni steel, for the flow pipe counteracts limescale deposits on the pipe inner walls.

Die nachstehende Beschreibung dient der Erläuterung des Gegenstands gemäß der Erfindung, von dem ein Ausführungsbeispiel in den Zeichnungen dargestellt ist. Es zeigen:

Figur 1
eine Geschirrspülmaschine mit einem Außengehäuse und einem Spülbehälter in schematischer Darstellung,
Figur 2
einen Teilausschnitt des Spülbehälters und einer benachbarten Außengehäusewand der Spülmaschine mit einem Aufnahmeraum für einen Durchlauferhitzer zur Spülwassererwärmung.
Figur 3
den an einer Spülbehälterseitenwand der Geschirrspülmaschine installierten Durchlauferhitzer in der Vorderansicht,
Figur 4
den Durchlauferhitzer gemäß Fig. 3 in der Draufsicht.
The following description serves to explain the object according to the invention, an exemplary embodiment of which is shown in the drawings. Show it:
Figure 1
a dishwasher with an outer housing and a washing container in a schematic representation,
Figure 2
a partial section of the washing container and an adjacent outer housing wall of the dishwasher with a receiving space for a water heater for heating the washing water.
Figure 3
the water heater installed on a side wall of the dishwasher in the front view,
Figure 4
3 in a top view.

Eine mit (1) in Fig. 1 bezeichnete Geschirrspülmaschine besitzt einen Spülbehälter (2) und mehrere Sprüharme (3, 4, 5) zwischen Geschirrkörben (6, 7, 8) in unterschiedlichen unteren und oberen Spülebenen. Die Sprüharme (3, 4, 5) werden vom umlaufenden Spülwasser einer vorgeschalteten Umwälzpumpe (9) gespeist.A dishwasher designated by (1) in Fig. 1 has a washing container (2) and a plurality of spray arms (3, 4, 5) between dishes (6, 7, 8) in different lower and upper washing levels. The spray arms (3, 4, 5) are fed by the circulating rinse water of an upstream circulation pump (9).

Für die Erwärmung der umzuwälzenden Spülflüssigkeit ist ein elektrischer Durchlauferhitzer (10) als Heizeinrichtung im Umwälzpumpenkreislauf außerhalb des Spülbehälters (2) im Leitungsweg von der Umwälzpumpe (9) nur zu den oberen Sprüharmen (4, 5) in der Spülwasser-Umlaufleitung vorgesehen. Dafür ist nach der Erfindung ein separater, kanalähnlicher Aufnahmeraum (12), siehe Fig. 2, hinter der Umwälzpumpe (9) im Leitungsweg zu den oberen Sprüharmen (4, 5) zwischen einer Spülbehälterwand (2a) des Spülbehälters (2) und der benachbarten Außengehäusewand (13) im Spülmaschinengehäuse (14) vorgesehen. Dieser Raum könnte z. B. durch einen Ausschnitt in der Spülbehälterisolierung (15) oder durch Fortlassen der Isolierung in diesem Bereich geschaffen werden.For heating the rinsing liquid to be circulated, an electric instantaneous water heater (10) is provided as a heating device in the circulation pump circuit outside the rinsing container (2) in the line path from the circulation pump (9) only to the upper spray arms (4, 5) in the rinsing water circulation line. For this purpose, according to the invention, there is a separate, channel-like receiving space (12), see FIG. 2, behind the circulating pump (9) in the line to the upper spray arms (4, 5) between a washing compartment wall (2a) of the washing compartment (2) and the neighboring one External housing wall (13) provided in the dishwasher housing (14). This room could e.g. B. by a cutout in the rinsing tank insulation (15) or by omitting the insulation in this area.

Der in diesem Bereich installierte Durchlauferhitzer (10) ist als ein die Spülflüssigkeit führendes von außen elektrisch beheiztes Durchlaufrohr (17) in überwiegend gestreckter und gerader Form ausgebildet.The flow heater (10) installed in this area is designed as a flow pipe (17) which is electrically heated from the outside and which is predominantly elongated and straight in shape.

Nach Fig. 3 und 4 ist der Durchlauferhitzer (10) als ein von außen über ein oder mehrere separate Rohrheizkörper (18) elektrisch beheiztes langgestrecktes Durchlaufrohr (17) für die zu erwärmende Spülflüssigkeit auf einem parallel zu einer Spülbehälterwand (2a) ausgerichteten geraden Trägerbauteil (11) ausgebildet. Auf diesem Trägerbauteil (11) sind auch die Rohrheizkörper (18) parallel zur Längsrichtung des Durchlaufrohres (17) angeordnet. Das Durchlaufrohr (17) ist endseitig mit Spülwasseranschlüssen (19) zur lösbaren Verbindung mit der Spülwasser-Umlaufleitung versehen und die Rohrheizkörper (18) besitzen separat verbindbare elektrische Leitungsanschlüsse (20), die jeweils am Ende des Trägerbauteils (11) leicht abgebogen sind und somit die Durchlaufrohrenden (21) nicht beheizen sowie für eine Montage in der Spülwasser-Umlaufleitung freihalten.3 and 4, the flow heater (10) is an elongated flow pipe (17), which is electrically heated from the outside via one or more separate tubular heating elements (18), for the washing liquid to be heated, on a straight support component (2) aligned parallel to a washing container wall (2a). 11) trained. The tubular heating elements (18) are also arranged parallel to the longitudinal direction of the flow tube (17) on this support component (11). The flow pipe (17) is provided at the end with rinsing water connections (19) for detachable connection to the rinsing water circulation line and the tubular heaters (18) have separately connectable electrical line connections (20), which are slightly bent at the end of the support component (11) and thus Do not heat the flow pipe ends (21) and keep them free for installation in the flushing water circulation line.

Wie aus Fig. 4 ersichtlich, ist das Trägerbauteil (11) ein Strangpreßteil, das eine in Längsrichtung des Preßteils verlaufende Durchgangsbohrung (24) zur formschlüssigen Aufnahme und kraftschlüssigen Halterung des separaten Durchlaufrohres (17) für die zu erwärmende Spülflüssigkeit aufweist. Das Durchlaufrohr (17) ist in dieser Durchgangsbohrung (24) verpreßt, wobei die Innenwandung der Bohrung zur Wärmeleitung am Rohraußenmantel dicht anliegt. Das Durchlaufrohr (17) wird von zwei Rohrheizkörpern (18) außen beheizt, die jeweils mit separat verbindbaren elektrischen Leitungsanschlüssen (20) zur Realisierung vorgegebener oder auch wählbarer Anschlußwerte (Verbindungsbrücke 22) versehen sind, wobei die Rohrheizkörper (18) außerhalb des Durchlaufrohres (17) in zugeordneten zur Durchgangsbohrung (24) parallel verlaufenden Bohrungen (25) des Strangpreßteils verpreßt sind. Es können auch weitere Bohrungen (25) für zusätzliche Rohrheizkörper (18) im Strangpreßteil vorgesehen werden.As can be seen from FIG. 4, the carrier component (11) is an extruded part which has a through bore (24) running in the longitudinal direction of the pressed part for the positive reception and non-positive mounting of the separate flow tube (17) for the washing liquid to be heated. The flow tube (17) is pressed into this through bore (24), the inner wall of the bore for heat conduction lying tightly against the outer tube jacket. The flow tube (17) is heated on the outside by two tubular heating elements (18), each of which is provided with separately connectable electrical line connections (20) for realizing predetermined or also selectable connection values (connecting bridge 22), the tubular heating elements (18) outside the flow tube (17 ) are pressed in the holes (25) of the extruded part that run parallel to the through hole (24). Additional bores (25) for additional tubular heating elements (18) can also be provided in the extruded part.

Durch Anordnung ein oder mehrerer Rohrheizkörper (18) im Strangpreßteil mit separat verbindbaren Leitungsanschlüssen (20), lassen sich bei Bedarf verschiedene Anschlußwerte realisieren, so daß beispielsweise ein und derselbe Durchlauferhitzer (10) nur mit einer anderen Verdrahtung oder Anzahl von Rohrheizkörpern (18) für verschiedene Gerätetypen mit unterschiedlichen Leistungsstufen eingesetzt werden kann. Es bietet sich dabei auch die einfache Möglichkeit, den Durchlauferhitzer (10) mit einer höheren Leistung zwecks Verkürzung der Programmlaufzeiten auszubilden.By arranging one or more tubular heaters (18) in the extruded part with separately connectable line connections (20), different connection values can be realized if necessary, so that, for example, one and the same instantaneous water heater (10) only with a different wiring or number of tubular heaters (18) for different device types with different performance levels can be used. There is also the simple possibility of designing the water heater (10) with a higher output in order to shorten the program run times.

Der zwischen dem Spülbehälter (2) und der benachbarten Außengehäusewand (13) der Spülmaschine vorgesehene Durchlauferhitzer (10) ist in dem Aufnahmeraum (12) auswechselbar angeordnet, wofür das Durchlaufrohr (17) jeweils endseitig über das Strangpreßteil hinaus verlängerte unbeheizte Rohrenden (21) besitzt, die mit den lösbaren Spülwasseranschlüssen (19) versehen sind. Auf diese "kalten" Rohrenden (21), die wie das übrige Durchlaufrohr (17) aus nicht rostendem Stahl, vorzugsweise aus Cr-Ni-Stahl bestehen, lassen sich problemlos der Kunststoffanschluß der Sprüharmleitung sowie der Gummi-Verbindungsschlauch zur Umwälzpumpe (9) aufstecken und festsetzen. Der vorteilhaft eingesetzte nicht rostende Werkstoff für das Durchlaufrohr (17) wirkt einem Kalkabsatz an den Rohrinnenwandungen entgegen, so daß kein Leistungsverlust auftritt. Für den Prüf- oder Reparaturfall ist es vorteilhaft, wenn die endseitigen Spülwasseranschlüsse (19) und/oder die elektrischen Leitungsanschlüsse (20) des Durchlauferhitzers (10) als steck- oder schraubbare Verbindungen ausgebildet werden. Dies ermöglicht auch eine einfache Montage sowie Demontage des Durchlauferhitzers (10) mit der Spülwasser-Umlaufleitung. Eine Unterbringung des Durchlauferhitzers (10) vorzugsweise an einer Spülbehälterseitenwand (2a), siehe (Fig. 3) im gerade verlaufenden Teil der Sprüharmversorgungsleitung (16) oder Spülwasser-Umlaufleitung im Spülmaschinengehäuse (14) bietet den einfachsten Montageweg, wenn hierfür die benachbarte Außengehäusewand (13) zugleich lösbar mit dem Gerät verbunden wird.The instantaneous heater (10) provided between the washing compartment (2) and the adjacent outer housing wall (13) of the dishwasher is in the receiving space (12) arranged interchangeably, for which purpose the continuous tube (17) in each case has unheated tube ends (21) which are extended beyond the extrusion and which are provided with the detachable rinsing water connections (19). On these "cold" pipe ends (21), which, like the rest of the flow pipe (17), are made of stainless steel, preferably of Cr-Ni steel, the plastic connection of the spray arm line and the rubber connecting hose to the circulation pump (9) can be easily attached and fix. The advantageously used non-rusting material for the continuous pipe (17) counteracts limescale deposits on the inside walls of the pipe, so that no loss of performance occurs. For the test or repair case, it is advantageous if the flushing water connections (19) and / or the electrical line connections (20) of the instantaneous water heater (10) are designed as pluggable or screwable connections. This also enables simple assembly and disassembly of the instantaneous water heater (10) with the flushing water circulation line. Placing the instantaneous water heater (10) preferably on a side wall of the rinse tank (2a), see (Fig. 3) in the straight part of the spray arm supply line (16) or rinse water circulation line in the dishwasher housing (14) offers the simplest installation route if the adjacent outer housing wall ( 13) is detachably connected to the device at the same time.

Das Trägerbauteil (11) besteht aus einem gut wärmeleitenden Werkstoff, vorzugsweise aus Aluminium, Messing bzw. aus derartigen Metallegierungen. Durch den auch fertigungstechnisch vorteilhaften Werkstoff Aluminium oder Messing des Strangpreßteils wird ein idealer Wärmeübergang zwischen den Rohrheizkörpern (18) und dem Durchlaufrohr (17) für die Spülflüssigkeit erreicht. Dieser Werkstoff läßt sich außerdem einfach mit dem Durchlaufrohr (17) sowie mit den Heizkörpern form- und kraftschlüssig verbinden.The carrier component (11) consists of a highly thermally conductive material, preferably aluminum, brass or metal alloys of this type. An ideal heat transfer between the tubular heating elements (18) and the flow tube (17) for the rinsing liquid is achieved due to the aluminum or brass material, which is also advantageous in terms of production technology. This material can also be easily connected to the flow tube (17) and to the radiators in a positive and non-positive manner.

Die Länge des Durchlaufrohres (17) beträgt bei einer üblichen Heizleistung der Rohrheizkörper (18) von z. B. 3 kW - dies entspricht beispielsweise der Leistung von an sich bekannten innerhalb des Spülbehälters (2) installierten Rohrheizkörpern (18) - wenigstens 350 mm Länge für den zu beheizenden Teil (Strangpreßteillänge). Für eventuelle Leistungsreserven oder für wählbare unterschiedliche Leistungen ist bei einer Geschirrspülmaschine (1) mit Normabmessungen die Länge bis auf 600 mm vergrößerbar.The length of the flow tube (17) is at a conventional heating power of the tubular heater (18) of z. B. 3 kW - this corresponds, for example, to the performance of tubular radiators (18) which are known per se and are installed inside the washing compartment (2) - at least 350 mm in length for the part to be heated (extruded part length). In the case of a dishwasher (1) with standard dimensions, the length can be increased to 600 mm for any power reserves or for selectable different outputs.

Die gegenüber dem Strangpreßteil verlängerten unbeheizten Rohrenden (21) mit den Spülwasseranschlüssen (19) erstrecken sich zweckmäßig jeweils bis in den Bereich der Spülbehälteroberkante bzw. -unterkante, können aber zumindest im unteren Gerätebereich um den Spülbehälter (2) zum Anschluß mit der Umwälzpumpe (9) bzw. der Spülwasser-Umlaufleitung herumgeführt werden.The unheated pipe ends (21) with the flushing water connections (19), which are extended compared to the extruded part, expediently each extend into the area of the top or bottom edge of the flushing tank, but can at least in the lower area of the device around the flushing tank (2) for connection to the circulation pump (9 ) or the flushing water circulation line.

Die Anordnung des Durchlauferhitzers (10) hinter dem unteren Sprüharm (3) im vorzugsweise geraden Leitungsweg zu den oberen Sprüharmen (4, 5) zwischen dem Spülbehälter (2) und dem Außengehäuse schafft Platz im unteren Gerätebereich für zusätzliche Sicherheitseinrichtungen, wie Leckwasserwannen, Schwimmer und dergl. und vermeidet Einbauprobleme für die Umwälzpumpe (9), die Enthärtungseinrichtung (E), den Frischwasseranschluß (F) und für die Entleerungspumpe(L); den Laugenablauf (A) einschließlich eventuell vorhandener Druckwächter (D) und Ventile (V).The arrangement of the instantaneous water heater (10) behind the lower spray arm (3) in the preferably straight line path to the upper spray arms (4, 5) between the washing container (2) and the outer housing creates space in the lower device area for additional safety devices, such as leakage water trays, floats and The like. And avoids installation problems for the circulation pump (9), the softening device (E), the fresh water connection (F) and for the drain pump (L); the drain (A) including any pressure switches (D) and valves (V).

Der schon genannte Aufnahmeraum (12) im Spülmaschinengehäuse (14) nach Fig. 2 kann vorzugsweise als eine von oben, unten oder von der Seite der Geschirrspülmaschine (1) bei abgenommenem Deckel oder Seitenverkleidung aus erreichbare Montagekammer für den Durchlauferhitzer (10) ausgebildet werden, in welcher der Durchlauferhitzer (10) wärmeisoliert und auch elektrisch isoliert befestigt ist. Es ist für die Austauschbarkeit des Durchlauferhitzers (10) ferner vorteilhaft, wenn das Strangprofilteil lösbar über eine Rastverbindung (23) an einer Spülbehälterwand (2a), vorzugsweise an der Spülbehälterseitenwand befestigt wird. Ebenso könnte der Durchlauferhitzer (10) aber auch an der Spülbehälterrückwand oder auf der Spülbehälteroberseite unterhalb der angrenzenden auch abnehmbaren Außengehäusewand (13) installiert werden.The already mentioned receiving space (12) in the dishwasher housing (14) according to FIG. 2 can preferably be designed as an assembly chamber for the continuous-flow heater (10) that can be reached from above, below or from the side of the dishwasher (1) with the cover or side panel removed. in which the water heater (10) is thermally insulated and also electrically insulated. For the interchangeability of the continuous-flow heater (10), it is also advantageous if the extruded profile part is detachably fastened to a washing compartment wall (2a), preferably to the washing compartment side wall, via a snap-in connection (23). Likewise, the instantaneous water heater (10) could also be installed on the rear wall of the washing container or on the top of the washing container below the adjacent, also removable outer housing wall (13).

Zur Sicherheit ist der Durchlauferhitzer (10) in nicht dargestellter an sich bekannter Weise mit Thermostateinrichtungen versehen. Nach der Erfindung ist der Durchlauferhitzer (10) in wärmeleitendem Kontakt außen direkt am Spülbehälter (2) lösbar angeordnet. Diese indirekte Spülwassererwärmung bringt eine zusätzliche sinnvolle und energiesparende Ausnutzung der Strahlungswärme der Spülwasserheizung, wobei die Wärmeisolation gegenüber der benachbarten Außengehäusewand (13) aber noch beibehalten werden könnte.For safety, the instantaneous water heater (10) is provided with thermostatic devices in a manner not known per se. According to the invention, the instantaneous water heater (10) is releasably arranged in heat-conducting contact on the outside directly on the washing container (2). This indirect rinsing water heating brings about an additional sensible and energy-saving use of the radiant heat of the rinsing water heater, but the heat insulation with respect to the adjacent outer housing wall (13) could still be retained.

Claims (9)

  1. Dishwasher (1) with a wash cabinet (2) and several spray arms (3, 4, 5) situated in the top and bottom dishwashing levels and which are fed with water from a circulation pump (9) fitted upstream, whereby an electric through-flow heater (10) is fitted for heating the wash liquor to be circulated, whereby the through-flow heater is fitted outside the wash cabinet (2) between the wash cabinet and the adjacent outer casing (13) of the appliance and in the path to the upper dishwashing level in the wash liquor circulation system, whereby the through-flow heater (10) is fitted with water circuit connections (19) linking the heater to the circulation system, and with separate electrical plug-in connections (20) for electrical tubular heater elements (18),
    characterised in that an elongated through-flow pipe (17), which is heated from outside by at least one parallel tubular heater element (18) and is embedded in an equally elongated housing (11) is used as a through-flow heater (10), whereby the tubular heater elements (18) are fitted to the housing (11) and whereby the water circuit connections (19) attached to the unheated ends (21) of the through-flow pipe (17) for the wash liquor to be heated are detachable,
    whereby the through-flow heater (10) with its housing (11) and the electric tubular heater elements (18) is fitted in a channel-like cavity (12) in the dishwasher casing (14), is fixed as a separable unit to the wall of the wash cabinet (2a) with heat conducting contact to the wash cabinet (2) and can be accessed when the cabinet lid and/or the side panel lagging are removed, and
    whereby the wash cabinet insulation (15) is cut out round the channel-like cavity (12) which is parallel to the wall of the inner wash cabinet (2a).
  2. Dishwasher in accordance with claim 1, characterised in that the length of the heated section of the through-flow heater (10) is at least 350 mm and the unheated sections (21) at opposite ends of the housing (11) are extended in line with the top and bottom edge of the wash cabinet or lead around the wash cabinet walls (2a) for connection to the wash liquor circulation system.
  3. Dishwasher in accordance with claims 1 and 2, characterised in that the length of the heated section of the through-flow heater (10) is preferably between 350 mm and 600 mm and the detachable water circuit connections (19) and electrical connections (20) of the through-flow heater (10) are detachable connections.
  4. Dishwasher in accordance with one of the claims 1 to 3, characterised in that the channel-like cavity (12) for the through-flow heater (10) in the dishwasher casing (14) can preferably be accessed from one side of the dishwasher (1) and that the adjacent external wall of the casing (13) can be removed from the dishwasher (1).
  5. Dishwasher in accordance with one of the claims 1 to 4, characterised in that the inner wash cabinet insulation (15) is cut-out or excluded altogether round the channel-like cavity (12) which is parallel to the inner wash cabinet wall (2a).
  6. Dishwasher in accordance with one of the claims 1 to 5, characterised in that the channel-like cavity (12) is designed as an installation area for the through-flow heater (10).
  7. Dishwasher in accordance with one of the claims 1 to 6, characterised in that the housing (11) of the through-flow heater (10) is an extruded moulded part made of heat conducting material, preferably aluminium, brass or similar metal alloys and that this extruded part is provided with a through hole (24) to retain and hold the through-flow pipe (17) which is made of stainless steel, preferably a chrome-nickel alloy, whereby additional drill holes (25) situated parallel to the through-flow pipe are provided in the moulded part for the tubular heater elements (18).
  8. Dishwasher in accordance with claim 7, characterised in that the through-flow pipe (17) is pressed into the respective through hole (24) and the tubular heater elements (18), which are not fitted to the through-flow pipe (17) but share the same housing unit (11), are pressed into the respective drill holes (25) on the moulded part.
  9. Dishwasher in accordance with one of the claims 1 to 8, characterised in that the through-flow heater (10) is attached to and detached from the wash cabinet side panel via a clip-on connection (23) on the moulded part (housing 11).
EP93115366A 1992-09-23 1993-09-23 Dishwasher with continuous flow-heater Expired - Lifetime EP0591774B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4231830 1992-09-23
DE4231830 1992-09-23

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EP0591774A1 EP0591774A1 (en) 1994-04-13
EP0591774B1 true EP0591774B1 (en) 1997-08-27

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EP93115366A Expired - Lifetime EP0591774B1 (en) 1992-09-23 1993-09-23 Dishwasher with continuous flow-heater

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EP (1) EP0591774B1 (en)
DE (2) DE4332246A1 (en)
ES (1) ES2108796T3 (en)

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Publication number Priority date Publication date Assignee Title
IT1282922B1 (en) * 1995-01-09 1998-04-01 Zanussi Elettrodomestici DISHWASHER WITH ELECTRIC HEATING VEHICLES
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EP0591774A1 (en) 1994-04-13
ES2108796T3 (en) 1998-01-01
DE59307198D1 (en) 1997-10-02
DE4332246A1 (en) 1994-03-24

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