EP0523324A2 - Support for a heating device in an oven, especially in a microwave cooking oven - Google Patents

Support for a heating device in an oven, especially in a microwave cooking oven Download PDF

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Publication number
EP0523324A2
EP0523324A2 EP19920105910 EP92105910A EP0523324A2 EP 0523324 A2 EP0523324 A2 EP 0523324A2 EP 19920105910 EP19920105910 EP 19920105910 EP 92105910 A EP92105910 A EP 92105910A EP 0523324 A2 EP0523324 A2 EP 0523324A2
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EP
European Patent Office
Prior art keywords
oven
bolt
furnace wall
heating device
expansion element
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
EP19920105910
Other languages
German (de)
French (fr)
Other versions
EP0523324A3 (en
EP0523324B1 (en
Inventor
Johann Klement
Klaus Dipl.-Ing. Thomas (Fh)
Martin Dipl.-Ing. Schulte
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BOSCH-SIEMENS HAUSGERAETE GMBH
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Individual
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Publication of EP0523324A2 publication Critical patent/EP0523324A2/en
Publication of EP0523324A3 publication Critical patent/EP0523324A3/xx
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Publication of EP0523324B1 publication Critical patent/EP0523324B1/en
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/62—Heating elements specially adapted for furnaces
    • H05B3/66—Supports or mountings for heaters on or in the wall or roof

Definitions

  • the invention relates to a holder for a heating device in an oven, preferably a microwave oven, according to the preamble of claim 1.
  • part of a heating device namely a protective tube for a temperature sensor
  • a protective tube for a temperature sensor is laid through an opening in the oven wall and extends from the oven interior to the exterior of the oven and is fastened to the oven wall by means of a screw connection.
  • An elastic contact foil with spreading flaps is used for safe metallic contact between the protective tube and the furnace wall, which is attached to the protective tube from the outside, with the spreading flaps spreading until it lies against the uncoated outside of the furnace muffle.
  • assembly and disassembly for example when carrying out repair work, must be carried out from the outside of the furnace, which in the event of repair requires removal of the furnace muffle from its outer housing.
  • the invention has for its object to provide a holder for a heating device in a coating on the inside, e.g. to improve the oven provided with enamel so that even with extreme temperature fluctuations a permanent, exact attachment of the heating device is guaranteed and microwave suitability is given with special consideration of simple and cost-saving assembly and disassembly.
  • the holder according to the invention is suitable for carrying out repair work on the heating device, that is to say a domontage, for example of the grill radiator, from the inside of the oven.
  • the presence of the expansion element on the one hand achieves a permanent elastic connection between the heating device or its support element and the furnace wall even under extreme temperature conditions, for example in pyrolytic self-cleaning operation, and at the same time it ensures that an intimate metallic coupling of the heating element and its support element to one metallic surface of the furnace wall is maintained and maintained is obtained.
  • This metallic contact follows from the interior of the oven via the bolt spread with the expansion element to the enamel-free outside of the oven wall.
  • This bracket is equally suitable for attaching thermal radiators as for other parts of a heating device such as a temperature sensor or its protective tube.
  • the bolt has an annular groove in the area of the spreading tabs, into which the unspread spreading tabs engage and the spreading tabs brace therein. This gives you an assembly aid during the assembly of the bracket by pre-adjusting the expansion element and during repair work the expansion element is held in this annular groove and prevented from falling.
  • stops provided on the support element, which are created by bending up the boundary edges of the support element pressure surface and which allow the expansion element to be braced only to a certain extent, which maintains the elasticity of the expansion element.
  • FIGS. 1 to 3 show, for example, the top, top-side oven wall 1 of an oven, preferably with an integrated microwave heating device, which has, for example, a circular shape 2 in the area of a holder described below.
  • this furnace wall has a coating 3 in the form of an enamel layer on the inside, but not on the opposite outside. 4 with a heating element of a thermal heating device in the form of a grill radiator is referred to, which is fastened by means of sheet metal brackets 5 to support rods 6, this thermal heating device being located at a short distance immediately below the upper furnace wall.
  • tab-like support elements 7 are used, of which only one is shown in the drawing.
  • This metallic support element 7 is directly connected to the support rod 6 on the underside, for example welded and has at the end facing the furnace wall 1/2 a right-angled extension 8 with a pressure surface 9 facing the furnace wall 1/2.
  • the support element 7 has a Approach 8 and the pressure surface 9 dividing incision 10, which continues to a certain extent on the support element 7 towards the support rod 6.
  • a bolt 11 designed as a threaded bolt, which is provided with an annular groove 12 and has an external thread below the annular groove, onto which a threaded nut 12 with a washer 13 can be screwed.
  • the bolt 11 has in one piece a wide head part 14 which is plate-shaped or disk-shaped and has a vertically bent nose 15 as a means of preventing rotation, which for this purpose engages in an opening 16 in the furnace wall 1/2.
  • a spreading element 17 (see also FIG. 5), which is designed in the form of a circular disk and has concentric curvatures or corrugations 18, is attached to the bolt 11 from the interior of the oven.
  • the spreading element 17 has, in the central region, angularly bent spreading flaps which are produced by a cross-shaped free cut 19 and which engage in the region of the annular groove 12 in the non-spread state (assembly situation according to FIG. 2).
  • the bolt 11 is located in the above-mentioned notch 10 of the support element 7.
  • the support element with its divided attachment 8 is pressed in the direction of the furnace wall 1/2, the likewise divided pressure surface 9 being the expansion element relative to the enamelled surface of the Oven wall 1/2 braced.
  • the opposite boundary edges of the pressure surface 9 are angled in the direction of the furnace wall 1/2 to form stops 21 formed in this way. These stops 21 provide a defined distance when the threaded nut 12 is tightened ensured between the pressure surface 9 and the coating 3 of the furnace wall 1/2, so that an elastic deformation of the curvatures or corrugations 18 of the expansion element 17 occurs only to a certain extent, which maintains the elasticity of the expansion element.
  • the spreading lugs 20 spread radially inwards and make metallic contact with the surface of the annular groove 12. In this way, permanent and constant, reliable contact at all temperature conditions between the heating element via its support element, via the expansion element 17, over the bolt 11 and finally over the head part 14 to the non-coated outer surface of the furnace wall 1/2.
  • leakage radiation for example through the opening 22 in the oven wall 1/2, which serves to push the pin 11 through, is thus reliably prevented.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Resistance Heating (AREA)
  • Baking, Grill, Roasting (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

In the support of heating devices, e.g. of a grill heating element inside a baking oven, it has to be taken into consideration that very great temperature variations from 20 DEG C to over 500 DEG C occur during pyrolytic self-cleaning operation, associated with considerable material expansions and great forces at the connection points between heating element and baking oven. For microwave operation, it is important that there are no leaks at the fastening points and that none arise as a result of temperature loading. According to the invention, there is provided as fastening element a bolt which extends through the oven wall and which is on the one hand supported on the metal outside of the oven wall and on which on the other hand, inside the baking oven, a bearing element for the heating device and a bracing element are secured, which bracing element is braced with the bolt in a contacting manner. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Halterung für eine Heizeinrichtung in einem Backofen, vorzugsweise Mikrowellen-Backofen, gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a holder for a heating device in an oven, preferably a microwave oven, according to the preamble of claim 1.

Bei einem bekannten Mikrowellenofen (DE 30 28 352 C2) ist durch eine Öffnung in der Ofenwand hindurch ein Teil einer Heizeinrichtung, nämlich ein Schutzrohr für einen Temperaturfühler vom Ofeninnenraum bis außerhalb des Ofenraumes verlegt und mittels Schraubverbindung an der Ofenwand befestigt. Zur sicheren metallischen Kontaktierung zwischen Schutzrohr und Ofenwand dient eine elastische und Spreizlappen aufweisende Kontaktfolie, die von außen her auf das Schutzrohr aufgesteckt ist unter Verspreizung der Spreizlappen bis zur Anlage an der unbeschichteten Außenseite der Ofenmuffel. Hierbei hat die Montage und Demontage z.B. bei der Durchführung von Reparaturarbeiten von der Ofenaußenseite her zu erfolgen, was im Reparaturfall eine Entfernung der Ofenmuffel aus ihrem Außengehäuse erfordert. Bei Mikrowellenöfen ist es ferner bekannt (DE 30 35 747 C2), für die Halterung von Heizelementen, z.B. eines Grillheizkörpers, keramische Stützelemente zu verwenden, die mittels mit dem Grillheizkörper nicht metallisch verbundener metallischer Halterungen in Form von Stecklaschen an der Ofenwand befestigt sind. Die Erfahrung hat gezeigt, daß diese keramischen Körper Mikrowellen absorbieren und damit die nutzbare Mikrowellenleistung reduzieren und im übrigen bei mnechanischer Einwirkung bruchempfindlich sind. Schließlich ist es bei einem Backofen mit integrierter Mikrowellen-Einrichtung bekannt (DE-GM 88 12 765), einen Grillheizkörper in weitgehend loser Ankopplung auf Tragstäben zu lagern und diese Tragstäbe einzeln an der Muffelwand starr zu befestigen.In a known microwave oven (DE 30 28 352 C2), part of a heating device, namely a protective tube for a temperature sensor, is laid through an opening in the oven wall and extends from the oven interior to the exterior of the oven and is fastened to the oven wall by means of a screw connection. An elastic contact foil with spreading flaps is used for safe metallic contact between the protective tube and the furnace wall, which is attached to the protective tube from the outside, with the spreading flaps spreading until it lies against the uncoated outside of the furnace muffle. In this case, assembly and disassembly, for example when carrying out repair work, must be carried out from the outside of the furnace, which in the event of repair requires removal of the furnace muffle from its outer housing. In the case of microwave ovens, it is also known (DE 30 35 747 C2) to use ceramic support elements for holding heating elements, for example a grill radiator, which are fastened to the oven wall by means of metallic brackets in the form of plug-in tabs which are not metallically connected to the grill radiator. Experience has shown that these ceramic Bodies absorb microwaves and thus reduce the usable microwave power and are otherwise susceptible to breakage when exposed to mechanical stress. Finally, it is known in an oven with an integrated microwave device (DE-GM 88 12 765) to mount a grill element in largely loose coupling on supporting bars and to rigidly attach these supporting bars individually to the muffle wall.

Der Erfindung liegt die Aufgabe zugrunde, eine Halterung für eine Heizeinrichtung in einem an der Innenseite mit einer Beschichtung, z.B. mit Email versehenen Backofen so zu verbessern, daß auch bei extremen Temperaturschwankungen eine dauerhafte, exakte Befestigung der Heizeinrichtung gewährleistet und Mikrowellentauglichkeit gegeben ist unter besonderer Berücksichtigung einer einfachen und kostensparenden Montage und Demontage.The invention has for its object to provide a holder for a heating device in a coating on the inside, e.g. to improve the oven provided with enamel so that even with extreme temperature fluctuations a permanent, exact attachment of the heating device is guaranteed and microwave suitability is given with special consideration of simple and cost-saving assembly and disassembly.

Diese Aufgabe wird erfindungsgemäß gelöst durch die im Kennzeichnungsteil des Patentanspruches 1 angegebenen Maßnahmen. Vorteilhafte ausgestaltungen der Erfindung ergeben sich aus den nachfolgenden Patentansprüchen.This object is achieved by the measures specified in the characterizing part of claim 1. Advantageous refinements of the invention result from the following patent claims.

Die erfindungsgemäße Halterung ist dazu geeignet, Reparaturarbeiten an der Heizeinrichtung, also eine Domontage z.B. des Grillheizkörpers von der Innenseite des Backofens aus vorzunehmen. Durch das Vorhandensein des Spreizelementes wird zum einen eine dauerhafte elastische Verbindung zwischen der Heizeinrichtung bzw. dessen Tragelement und der Ofenwand auch bei extremen Temperaturverhältnissen, z.B. bei pyrolytischem Selbstreinigungsbetrieb, erreicht und gleichzeitig ist gewährleistet, daß eine innige metallische Ankopplung des Heizelementes und seines Tragelementes an eine metallische Fläche der Ofenwand erhalten und aufrecht erhalten wird. Hierbei folgt dieser metallische Kontakt vom Innenraum des Backofens her über den mit dem Spreizelement verspreizten Bolzen zur emailfreien Außenseite der Ofenwand. Diese Halterung eignet sich gleichermaßen für die Befestigung von thermischen Heizkörpern wie für andere Teile einer Heizeinrichtung wie z.B. für einen Temperaturfühler oder dessen Schutzrohr.The holder according to the invention is suitable for carrying out repair work on the heating device, that is to say a domontage, for example of the grill radiator, from the inside of the oven. The presence of the expansion element on the one hand achieves a permanent elastic connection between the heating device or its support element and the furnace wall even under extreme temperature conditions, for example in pyrolytic self-cleaning operation, and at the same time it ensures that an intimate metallic coupling of the heating element and its support element to one metallic surface of the furnace wall is maintained and maintained is obtained. This metallic contact follows from the interior of the oven via the bolt spread with the expansion element to the enamel-free outside of the oven wall. This bracket is equally suitable for attaching thermal radiators as for other parts of a heating device such as a temperature sensor or its protective tube.

Gemäß einer bevorzugten Ausgestaltung der Erfindung besitzt der Bolzen im Bereich der Spreizlappen eine Ringnut, in die die ungespreizten Spreizlappen eingreifen und sich die gespreizten Spreizlappen darin verspannen. Damit erhält man bei der Montage der Halterung eine Montagehilfe durch Vorjustierung des Spreizelementes und bei Reparaturarbeiten wird das Spreizelement in dieser Ringnut gehalten und am Herabfallen gehindert.According to a preferred embodiment of the invention, the bolt has an annular groove in the area of the spreading tabs, into which the unspread spreading tabs engage and the spreading tabs brace therein. This gives you an assembly aid during the assembly of the bracket by pre-adjusting the expansion element and during repair work the expansion element is held in this annular groove and prevented from falling.

Ebenfalls als Montagehilfe dienen am Tragelement vorgesehene, durch Hochbiegen der Begrenzungskanten der Tragelemente-Druckfläche geschaffene Anschläge, die eine Verspannung des Spreizelementes nur bis zu einem gewissen, die Elastizität des Spreizelementes erhaltenden Grad zulassen.Also used as an assembly aid are stops provided on the support element, which are created by bending up the boundary edges of the support element pressure surface and which allow the expansion element to be braced only to a certain extent, which maintains the elasticity of the expansion element.

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispieles nachstehend erläutert.The invention is explained below using an exemplary embodiment shown in the drawing.

Es zeigt

Fig.1
die Schnittansicht der Halterung mit daran montierter Heizeinrichtung,
Fig. 2 und 3
Schnittansichten der Halterung gemäß Fig. 1 in zwei aufeinander folgenden Montagesituationen,
Fig. 4
eine Draufsicht auf den bolzen mit Kopfteil als Einzelheit,
Fig. 5
eine Draufsicht auf das Spreizelement als Einzelheit.
It shows
Fig. 1
the sectional view of the bracket with the heating device mounted thereon,
2 and 3
1 in two successive assembly situations,
Fig. 4
a plan view of the bolt with head part as a detail,
Fig. 5
a plan view of the expansion element as a detail.

Die Fig. 1 bis 3 zeigen die z.B. obere, deckseitige Ofenwand 1 eines Backofens, vorzugsweise mit integrierter Mikrowellen-Heizeinrichtung, die im Bereich einer nachstehend beschriebenen Halterung eine z.B. kreisförmige Ausprägung 2 besitzt. Diese Ofenwand besitzt, wie die Fig. 2 und 3 zeigen, an der Innenseite eine Beschichtung 3 in Form einer Emailschicht, nicht jedoch an der gegenüberliegenden Außenseite. Mit 4 ist ein Heizelement einer thermischen Heizeinrichtung in Form eines Grillheizkörpers bezeichnet, der mittels Blechlaschen 5 an Tragstäben 6 befestigt ist, wobei diese thermische Heizeinrichtung sich mit geringem Abstand unmittelbar unterhalb der oberen Ofenwand befindet. Zur Befestigung der Tragstäbe 6 an der Ofenwand 1/2 dienen laschenartige Tragelemente 7, von denen in der Zeichnung nur eines dargestellt ist. Dieses metallische Tragelement 7 ist an der Unterseite unmittelbar mit dem Tragstab 6 verbunden, z.B. verschweißt und besitzt an dem der Ofenwand 1/2 zugewandten Ende einen rechtwinkelig abgebogenen Ansatz 8 mit einer der Ofenwand 1/2 zugewandten Druckfläche 9. Das Tragelement 7 besitzt einen den Ansatz 8 und die Druckfläche 9 teilenden Einschnitt 10, der sich am Tragelement 7 zum Tragstab 6 hin ein Stück weit fortsetzt. Zur Befestigung des Tragelementes 7 dient ein als Gewindebolzen ausgeführter Bolzen 11, der mit einer Ringnut 12 versehen ist und unterhalb der Ringnut ein Außengewinde besitzt, auf das eine Gewindemutter 12 mit Unterlegscheibe 13 aufschraubbar ist. Der Bolzen 11 besitzt einstückig einen breiten Kopfteil 14, der platten- bzw. scheibenförmig ausgebildet ist und eine senkrecht abgebogene Nase 15 als Verdrehsicherung besitzt, die zu diesem Zweck in eine Öffnung 16 der Ofenwand 1/2 eingreift. Auf den Bolzen 11 vom Innenraum des Backofens aus aufgesteckt ist ein Spreizelement 17 (siehe auch Fig.5), das in Form einer kreisrunden Scheibe ausgebildet ist und konzentrische Wölbungen oder Wellungen 18 aufweist. Das Spreizelement 17 besitzt im Mittelbereich winkelig abgebogene, durch kreuzförmigen Freischnitt 19 erzeugte Spreizlappen, die im ungespreizten Zustand in den Bereich der Ringnut 12 eingreifen (Montagesituation gemäß Fig. 2). Der Bolzen 11 befindet sich in dem vorerwähnten Einschnitt 10 des Tragelementes 7. Mit dem Anziehen der Gewindemutter 12 wird das Tragelement mit seinem geteilten Ansatz 8 in Richtung der Ofenwand 1/2 gedrückt, wobei die ebenfalls geteilte Druckfläche 9 das Spreizelement gegenüber der emaillierten Oberfläche der Ofenwand 1/2 verspannt. Wie deutlich aus den Fig. 2 und 3 zu ersehen, sind die gegenüberliegenden Begrenzungskanten der Druckfläche 9 in Richtung der Ofenwand 1/2 abgewinkelt unter Bildung von auf diese Weise gebildeten Anschlägen 21. Durch diese Anschläge 21 wird beim Anziehen der Gewindemutter 12 ein definierter Abstand zwischen Druckfläche 9 und Beschichtung 3 der Ofenwand 1/2 sichergestellt, so daß eine elastische Verformung der Wölbungen oder Wellungen 18 des Spreizelementes 17 nur bis zu einem gewissen, die Elastizität des Spreizelementes erhaltenden Grade erfolgt. Nach dem Anziehen der Gewindemutter 12 (Montagesituation gemäß Fig. 3) verspreizen sich die Spreizlappen 20 radial nach innen und kontaktieren metallisch mit der Oberfläche der Ringnut 12. Auf diese Weise ist eine dauerhafte und bei allen Temperaturverhältnissen gleichbleibend sichere metallische Kontaktierung zwischen dem Heizelement über dessen Tragelement, über das Spreizelement 17, über den Bolzen 11 und schließlich über den Kopfteil 14 zur nicht-beschichteten Außenfläche der Ofenwand 1/2 hergestellt. Bei Mikrowellenbetrieb des Backofens wird damit eine Leckstrahlung z.B. durch die Öffnung 22 in der Ofenwand 1/2 hindurch, die zum Hindurchstecken des Bolzens 11 dient, in sicherer Weise verhindert.1 to 3 show, for example, the top, top-side oven wall 1 of an oven, preferably with an integrated microwave heating device, which has, for example, a circular shape 2 in the area of a holder described below. As shown in FIGS. 2 and 3, this furnace wall has a coating 3 in the form of an enamel layer on the inside, but not on the opposite outside. 4 with a heating element of a thermal heating device in the form of a grill radiator is referred to, which is fastened by means of sheet metal brackets 5 to support rods 6, this thermal heating device being located at a short distance immediately below the upper furnace wall. To fasten the support rods 6 to the furnace wall 1/2, tab-like support elements 7 are used, of which only one is shown in the drawing. This metallic support element 7 is directly connected to the support rod 6 on the underside, for example welded and has at the end facing the furnace wall 1/2 a right-angled extension 8 with a pressure surface 9 facing the furnace wall 1/2. The support element 7 has a Approach 8 and the pressure surface 9 dividing incision 10, which continues to a certain extent on the support element 7 towards the support rod 6. For fastening the support element 7 is a bolt 11 designed as a threaded bolt, which is provided with an annular groove 12 and has an external thread below the annular groove, onto which a threaded nut 12 with a washer 13 can be screwed. The bolt 11 has in one piece a wide head part 14 which is plate-shaped or disk-shaped and has a vertically bent nose 15 as a means of preventing rotation, which for this purpose engages in an opening 16 in the furnace wall 1/2. A spreading element 17 (see also FIG. 5), which is designed in the form of a circular disk and has concentric curvatures or corrugations 18, is attached to the bolt 11 from the interior of the oven. The spreading element 17 has, in the central region, angularly bent spreading flaps which are produced by a cross-shaped free cut 19 and which engage in the region of the annular groove 12 in the non-spread state (assembly situation according to FIG. 2). The bolt 11 is located in the above-mentioned notch 10 of the support element 7. When the threaded nut 12 is tightened, the support element with its divided attachment 8 is pressed in the direction of the furnace wall 1/2, the likewise divided pressure surface 9 being the expansion element relative to the enamelled surface of the Oven wall 1/2 braced. As can be clearly seen from FIGS. 2 and 3, the opposite boundary edges of the pressure surface 9 are angled in the direction of the furnace wall 1/2 to form stops 21 formed in this way. These stops 21 provide a defined distance when the threaded nut 12 is tightened ensured between the pressure surface 9 and the coating 3 of the furnace wall 1/2, so that an elastic deformation of the curvatures or corrugations 18 of the expansion element 17 occurs only to a certain extent, which maintains the elasticity of the expansion element. After tightening the threaded nut 12 (assembly situation according to FIG. 3), the spreading lugs 20 spread radially inwards and make metallic contact with the surface of the annular groove 12. In this way, permanent and constant, reliable contact at all temperature conditions between the heating element via its support element, via the expansion element 17, over the bolt 11 and finally over the head part 14 to the non-coated outer surface of the furnace wall 1/2. During microwave operation of the oven, leakage radiation, for example through the opening 22 in the oven wall 1/2, which serves to push the pin 11 through, is thus reliably prevented.

Claims (5)

Halterung für eine Heizeinrichtung in einem Backofen, vorzugsweise Mikrowellen-Backofen, mit einem metallischen, die thermische Heizeinrichtung oder einen Teil derselben tragenden Tragelement, das unter Verwendung eines elastischen, metallischen Spreizelementes an einer innenbeschichteten Ofenwand mit innigem metallischen Kontakt befestigt ist, dadurch gekennzeichnet, daß als Befestigungselement ein durch eine Öffnung (22) in der Ofenwand (1/2) in den Ofeninnenraum hindurch ragender Bolzen (11) vorgesehen ist, der mit einem verbreiterten Kopfteil (14) an der Außenseite der Ofenwand kontaktiert und an dem das Tragelement (7) zusammen mit dem Spreizelement (17) gegenüber der inneren Ofenwand axial verspannt ist und daß das im Grundprofil gewölbte Spreizelement zusätzlich gegenüber dem Bolzen durch Spreizung radial verspannt ist.Holder for a heating device in an oven, preferably a microwave oven, with a metallic supporting element which carries the thermal heating device or a part thereof and which is fastened to an internally coated oven wall with intimate metallic contact using an elastic, metallic expansion element, characterized in that A bolt (11) projecting through an opening (22) in the furnace wall (1/2) into the furnace interior is provided as a fastening element, which makes contact with a widened head part (14) on the outside of the furnace wall and on which the support element (7 ) is axially braced together with the expansion element (17) with respect to the inner furnace wall and that the expansion element curved in the basic profile is additionally radially tensioned with respect to the bolt by expansion. Halterung nach Anspruch 1, dadurch gekennzeichnet, daß das Spreizelement (17) in Form einer mit konzentrischen Wölbungen oder Wellungen (18) sowie im Mittelbereich mit gegeneinander gerichteten Spreizlappen (20) versehenen Federscheibe ausgebildet ist.Holder according to claim 1, characterized in that the expanding element (17) is designed in the form of a spring washer provided with concentric curvatures or corrugations (18) and in the central region with mutually directed expanding tabs (20). Halterung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Bolzen (11) im Bereich der Spreizlappen (20) eine Ringnut (12) besitzt, in die die ungespreizten Spreizlappen (20) eingreifen und sich die gespreizten Spreizlappen darin verspannen.Holder according to one of the preceding claims, characterized in that the bolt (11) in the region of the spreading tabs (20) has an annular groove (12) into which the unspread spreading tabs (20) engage and the spreading tabs brace therein. Halterung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kopfteil (14) des als Gewindebolzen ausgebildeten Bolzens (11) plattenartig ausgebildet und mit einer abgebogenen Nase (15) als Verdrehsicherung versehen ist, die in eine Öffnung (1) der Ofenwand 1/2 eingreift.Holder according to one of the preceding claims, characterized in that the head part (14) of the bolt (11) designed as a threaded bolt is plate-like and is provided with a bent nose (15) as a means of preventing rotation, which is inserted into an opening (1) in the furnace wall 1 / 2 intervenes. Halterung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Tragelement (7) eine durch einen Einschnitt (10) für den Bolzen (11) geteilte, der Ofenwand (1/2) zugewandte Druckfläche (9) für das Spreizelement (17) besitzt, die an gegenüberliegenden Begrenzungskanten in Richtung der Ofenwand abgewinkelt ist zur Bildung von mit der Ofenwand zusammenwirkenden, die axiale Verspannung des Spreizelementes bestimmenden Anschlägen (21).Holder according to one of the preceding claims, characterized in that the support element (7) has a pressure surface (9) for the expansion element (17) which is divided by an incision (10) for the bolt (11) and faces the furnace wall (1/2) , which is angled at opposite boundary edges in the direction of the furnace wall to form stops (21) which cooperate with the furnace wall and determine the axial bracing of the expansion element.
EP92105910A 1991-07-15 1992-04-06 Support for a heating device in an oven, especially in a microwave cooking oven Expired - Lifetime EP0523324B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4123425A DE4123425A1 (en) 1991-07-15 1991-07-15 BRACKET FOR A HEATING DEVICE IN AN OVEN, preferably MICROWAVE OVEN
DE4123425 1991-07-15

Publications (3)

Publication Number Publication Date
EP0523324A2 true EP0523324A2 (en) 1993-01-20
EP0523324A3 EP0523324A3 (en) 1994-03-16
EP0523324B1 EP0523324B1 (en) 1996-09-11

Family

ID=6436199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105910A Expired - Lifetime EP0523324B1 (en) 1991-07-15 1992-04-06 Support for a heating device in an oven, especially in a microwave cooking oven

Country Status (5)

Country Link
EP (1) EP0523324B1 (en)
AT (1) ATE142766T1 (en)
DE (2) DE4123425A1 (en)
ES (1) ES2092590T3 (en)
GR (1) GR3020991T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2711635A1 (en) * 2012-08-31 2014-03-26 Electrolux Home Products Corporation N.V. Cooking oven with heating element

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005044696A1 (en) * 2005-09-19 2007-03-22 BSH Bosch und Siemens Hausgeräte GmbH High-level built-in cooking device, has muffle which encloses cooking chamber, and thermal functional unit detachably fastened at rear wall of muffle, where functional unit is formed by heater and/or temperature sensor
DE102012109147A1 (en) * 2012-09-27 2014-04-17 Miele & Cie. Kg Household appliance construction device and household appliance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629538A (en) * 1969-10-23 1971-12-21 Mitsubishi Electric Corp Magnetron mounting device in an electronic range
DE3028352A1 (en) * 1980-07-25 1982-02-11 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Microwave oven with flexible microwave-conductive foil gasket - installed between rear wall and flange plate to prevent microwave energy transmission from protrusions at rear
US4752664A (en) * 1985-07-05 1988-06-21 Sharp Kabushiki Kaisha Microwave oven with a removably attached heater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629538A (en) * 1969-10-23 1971-12-21 Mitsubishi Electric Corp Magnetron mounting device in an electronic range
DE3028352A1 (en) * 1980-07-25 1982-02-11 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Microwave oven with flexible microwave-conductive foil gasket - installed between rear wall and flange plate to prevent microwave energy transmission from protrusions at rear
US4752664A (en) * 1985-07-05 1988-06-21 Sharp Kabushiki Kaisha Microwave oven with a removably attached heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2711635A1 (en) * 2012-08-31 2014-03-26 Electrolux Home Products Corporation N.V. Cooking oven with heating element

Also Published As

Publication number Publication date
DE59207099D1 (en) 1996-10-17
ATE142766T1 (en) 1996-09-15
ES2092590T3 (en) 1996-12-01
GR3020991T3 (en) 1996-12-31
DE4123425A1 (en) 1993-01-21
EP0523324A3 (en) 1994-03-16
EP0523324B1 (en) 1996-09-11

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