EP1255083A1 - Baking oven with a baking oven muffle - Google Patents

Baking oven with a baking oven muffle Download PDF

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Publication number
EP1255083A1
EP1255083A1 EP02017745A EP02017745A EP1255083A1 EP 1255083 A1 EP1255083 A1 EP 1255083A1 EP 02017745 A EP02017745 A EP 02017745A EP 02017745 A EP02017745 A EP 02017745A EP 1255083 A1 EP1255083 A1 EP 1255083A1
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EP
European Patent Office
Prior art keywords
muffle
sol
oven
baking oven
layer
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EP02017745A
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German (de)
French (fr)
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EP1255083B1 (en
Inventor
Gerhard Schmidmayer
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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    • 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
    • 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
    • F24C15/00—Details
    • F24C15/005—Coatings for ovens

Definitions

  • the present invention relates to an oven according to the preamble of the claim 1.
  • the oven muffle with an enamel layer is provided.
  • the enamel coating serves as an anti-corrosion layer and secondly as an antioxidant layer.
  • the Cleanability of the oven muffle improved and the surface hardness increased.
  • Last the look of the oven muffle is determined by the enamel.
  • the object of the present invention is therefore in an oven according to the preamble of claim 1, the performance characteristics of the oven muffle improve.
  • the protective layer is implemented as a hard sol-gel layer.
  • a sol-gel functional layer is provided on the sol-gel hard layer, which provides various areas of the muffle walls with special properties. These properties can be, for example, a particularly simple cleanability, a special sliding behavior or catalytic properties.
  • the functional layer is advantageously implemented as a layer approximately 10 ⁇ m, in particular approximately 2 to 3 ⁇ m thick. Owing to the sol-gel technique, the layers applied, despite their small thickness, have great stability and great adhesion both on top of one another and on the metal.
  • the thickness of the protective layer is less than about 30 microns, in particular less than 20 microns and preferably between about 5 and 10 microns. As a result of the low layer thickness, only slight stresses occur in the muffle wall. Furthermore, very good heat conduction from the heating elements or the muffle wall to the interior of the muffle is ensured and a low susceptibility to cracking of the protective layer or a low probability of chipping is realized.
  • This thin protective layer provides adequate protection against corrosion and oxidation as well as a hard surface protection for the metal.
  • Such thin protective layers can, in terms of process engineering, simply, preferably Sol-gel technology can be realized.
  • the sol-gel layer is, for example, simple Dip process can be applied to the muffle walls.
  • the sol-gel technique the low baking temperatures compared to the enamel technique from about 450 to 500 ° C favorable.
  • the applied sol-gel layers are also for the suitable for typical cooking temperatures.
  • the hard layer preferably has a thickness of 5 to 10 ⁇ m.
  • the protective layer is transparent and serves the inside of the muffle wall as a reflector. This is particularly beneficial if cooked with the help of heat radiation in the infrared range or in the visible light range becomes.
  • Such transparent layers can be easily represented as sol-gel layers.
  • the protective layer can be anodized, in particular hard anodized aluminum oxide layer.
  • This oxide layer is particularly characterized by its excellent hardness and smoothness.
  • a particularly good heat transfer from the heating element to the muffle wall or to the cooking space and an excellent heat distribution can be achieved in that the muffle wall has an insulating protective layer in the ⁇ m range on which the heating element is applied directly using thick film technology. If necessary, the heating element also with more complex coating processes, for example thin-film technology, be realized.
  • the strength the muffle wall can also be reduced to, for example, about 0.4 mm.
  • the oven muffle is provided with a stabilizing frame supported from the outside. This is especially important if the thickness the muffle wall is only about 0.3 to 0.5 mm. By this almost halving the Wall thickness of the oven muffle compared to the previously known prior art the heating-up times and heat distribution will continue to be significantly improved. moreover can be saved due to the low material thickness. Besides, that will Weight of the oven muffle significantly reduced.
  • Fig. 1 shows a rectangular oven muffle 1 made of stainless steel with five muffle walls 3. These are the two side walls, a bottom and a top wall and one Back wall.
  • the loading opening of the oven muffle 1 moves a muffle flange 5.
  • the oven muffle 1 is made in one piece in a hydroforming process. at This deep-drawing process shows the oven muffle in contrast to conventional ones mechanical deep-drawn parts defects, such as uneven and large changes in wall thickness, visible traces of drawing and a bead, as well as reduced Surface quality and reduced shape accuracy do not show up.
  • sol-gel technology are a muffle inside 7 and a muffle outside 9 coated with a sol-gel layer 11 (Fig. 2).
  • sol-gel a colloidal system from a solution (sol) using controlled condensation methods produced on a micrometer scale (gel).
  • This gel is made by drying Solvent removal compressed and then cured in a suitable manner or baked at a temperature of around 450 to 500 ° C.
  • the sol-gel layer is connected to the substrate via chemical compounds particularly firmly connected.
  • the resulting sol-gel layer is about 10 ⁇ m thick and forms a hard surface with electrical on both sides of the stainless steel muffle wall 3 Insulating properties. It also forms a tarnish and oxidation protection for the stainless steel.
  • the sol-gel hard layer are in at least one more Process step in sol-gel technology Functional layers on different areas of the Muffle inside 7 applied.
  • the sol-gel functional layers have a thickness of about 3 ⁇ m.
  • the protective layer formed from the two sol-gel layers 11 is of this type transparent that the heat radiation relevant for the preparation of food is in the infrared or can penetrate the protective layer in the visible light area and from the Stainless steel surface can be optimally reflected into the muffle interior (Fig. 2). If necessary transparent or opaque coloring of the layers is also possible.
  • the sol-gel hard layer is in a subsequent process step Muffle outside 9 meandering heating conductor 13 applied in thick-film technology (Fig. 3). Due to the particularly thin insulation layer between the heating conductor 13 and the muffle wall 3 is a particularly cheap and uniform heat transfer possible.
  • the heating conductors 13 can be connected to electrical connections via conductor connections 15 be supplied.
  • the oven muffle 1 is finally in a muffle insulation 17 made of fiber-free Insulation material, e.g. Perlite, embedded. Due to the insulation jacket is the oven muffle 1, the wall thickness of which is only 0.4 mm, stabilized. Furthermore, the Insulation shell 17 designed sufficiently resilient to thermal expansion not to tear the oven muffle 1 when heating up during a baking process.
  • a muffle insulation 17 made of fiber-free Insulation material, e.g. Perlite, embedded. Due to the insulation jacket is the oven muffle 1, the wall thickness of which is only 0.4 mm, stabilized.
  • the Insulation shell 17 designed sufficiently resilient to thermal expansion not to tear the oven muffle 1 when heating up during a baking process.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Cookers (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Special Wing (AREA)
  • Electric Ovens (AREA)

Abstract

The oven has a metal muffle which is closed at the front by a door. The walls of the muffle have heating elements for heating the cooking space to over 180 degrees C. The walls of the muffle are covered at least on the inside by a protective layer. The protective layer is less than 30 micrometer thick, and made of sol-gel resin.

Description

Die vorliegende Erfindung betrifft einen Backofen gemäß dem Oberbegriff des Patentanspruches 1.The present invention relates to an oven according to the preamble of the claim 1.

Ein derartiger Backofen ist allgemein bekannt, wobei die Backofenmuffel mit einer Emailschicht versehen ist. Die Emailbeschichtung dient zum einen als Antikorrosionsschicht und zum anderen als Antioxidationsschicht. Weiterhin wird durch die Emailschicht die Reinigbarkeit der Backofenmuffel verbessert und die Oberflächenhärte vergrößert. Zuletzt wird durch das Email die Optik der Backofenmuffel bestimmt. Diese Funktionen werden durch das Email bei Schichtstärken von typisch 100 bis 200 µm realisiert. Nachteilig an derartigen Schutzschichten aus Email sind insbesondere deren Sprödigkeit und die durch die unterschiedlichen Ausdehnungskoeffizienten von Email und Muffelmaterial entstehenden Zug- und Druckspannungen, die zu Bauteilverformungen, Rissen oder Abplatzern des Emails führen können.Such an oven is generally known, the oven muffle with an enamel layer is provided. The enamel coating serves as an anti-corrosion layer and secondly as an antioxidant layer. Furthermore, the Cleanability of the oven muffle improved and the surface hardness increased. Last the look of the oven muffle is determined by the enamel. These functions are realized by the enamel with layer thicknesses of typically 100 to 200 µm. Disadvantageous such protective layers made of enamel are particularly their brittleness and through the different expansion coefficients of enamel and muffle material arise Tensile and compressive stresses that lead to component deformation, cracks or flaking of the email.

Aufgabe der vorliegenden Erfindung ist es deshalb, bei einem Backofen nach dem Oberbegriff des Patentanspruches 1 die Gebrauchseigenschaften der Backofenmuffel zu verbessern.The object of the present invention is therefore in an oven according to the preamble of claim 1, the performance characteristics of the oven muffle improve.

Erfindungsgemäß ist dies bei einem Backofen mit den Merkmalen des Patentanspruches 1 erreicht. Gemäß dem kennzeichnenden Teil des Patentanspruches 1 ist die Schutzschicht als Sol-Gel-Hartschicht realisiert. Auf der Sol-Gel-Hartschicht ist eine Sol-Gel-Hautschicht ist eine Sol-Gel-Funktionalschicht vorgesehen, die verschiedene Bereiche der Muffelwände mit besonderen Eigenschaften ausstattet. Diese Eigenschaften können beispielsweise sein, eine besonders einfache Reinigbarkeit, ein besonderes Gleitverhalten oder katalytische Eigenschaften. Vorteilhafterweise ist die Funktionalschicht als etwa 10 µm, insbesondere etwa 2 bis 3 µm starke Schicht realisiert. Aufgrund der Sol-Gel-Technik verfügen die aufgebrachten Schichten trotz ihrer geringen Dicke sowohl aufeinander als auch auf dem Metall über eine große Stabilität und ein großes Anhaftvermögen.
Die Stärke der Schutzschicht ist geringer als etwa 30 µm, insbesondere geringer als 20 µm und bevorzugter Weise zwischen etwa 5 und 10 µm ist. Infolge der geringen Schichtstärke treten in der Muffelwand nur geringe Spannungen auf. Weiterhin ist eine sehr gute Wärmeleitung von den Heizelementen bzw. der Muffelwand zum Muffelinneren sichergestellt und ist eine geringe Rißanfälligkeit der Schutzschicht bzw. eine geringe Wahrscheinlichkeit von Abplatzern realisiert. Diese dünne Schutzschicht stellt einen ausreichenden Korrosions- und Oxidationsschutz sowie einen harten Oberflächenschutz für das Metall dar.According to the invention this is achieved in an oven with the features of claim 1. According to the characterizing part of claim 1, the protective layer is implemented as a hard sol-gel layer. A sol-gel functional layer is provided on the sol-gel hard layer, which provides various areas of the muffle walls with special properties. These properties can be, for example, a particularly simple cleanability, a special sliding behavior or catalytic properties. The functional layer is advantageously implemented as a layer approximately 10 μm, in particular approximately 2 to 3 μm thick. Owing to the sol-gel technique, the layers applied, despite their small thickness, have great stability and great adhesion both on top of one another and on the metal.
The thickness of the protective layer is less than about 30 microns, in particular less than 20 microns and preferably between about 5 and 10 microns. As a result of the low layer thickness, only slight stresses occur in the muffle wall. Furthermore, very good heat conduction from the heating elements or the muffle wall to the interior of the muffle is ensured and a low susceptibility to cracking of the protective layer or a low probability of chipping is realized. This thin protective layer provides adequate protection against corrosion and oxidation as well as a hard surface protection for the metal.

Derartig dünne Schutzschichten können verfahrenstechnisch einfach bevorzugterweise in Sol-Gel-Technik realisiert sein. Dabei ist die Sol-Gel-Schicht beispielsweise in einem einfachen Tauchverfahren auf die Muffelwände aufbringbar. Insbesondere sind bei der Sol-Gel-Technik die im Vergleich zur Emailierungstechnik niedrigen Einbrenntemperaturen von etwa 450 bis 500 °C günstig. Auch sind die aufgebrachten Sol-Gel-Schichten für die bei Garvorgängen typischen Temperaturen geeignet. Bevorzugter Weise besitzt die Hartschicht eine Stärke von 5 bis 10 µm.Such thin protective layers can, in terms of process engineering, simply, preferably Sol-gel technology can be realized. The sol-gel layer is, for example, simple Dip process can be applied to the muffle walls. In particular, the sol-gel technique the low baking temperatures compared to the enamel technique from about 450 to 500 ° C favorable. The applied sol-gel layers are also for the suitable for typical cooking temperatures. The hard layer preferably has a thickness of 5 to 10 µm.

Gemäß einer bevorzugten Ausführungsform ist die Schutzschicht transparent und dient die Innenseite der Muffelwand als Reflektor. Dies ist insbesondere dann günstig, wenn mit Hilfe von Wärmestrahlung im Infrarotbereich oder im sichtbaren Licht-Bereich gegart wird. Derartige Transparentschichten sind als Sol-Gel-Schichten problemlos darstellbar.According to a preferred embodiment, the protective layer is transparent and serves the inside of the muffle wall as a reflector. This is particularly beneficial if cooked with the help of heat radiation in the infrared range or in the visible light range becomes. Such transparent layers can be easily represented as sol-gel layers.

Falls die Backofenmuffel aus Aluminium besteht, kann die Schutzschicht als anodisierte, insbesondere hartanodisierte Aluminiumoxidschicht realisiert sein. Diese Oxidschicht zeichnet sich insbesondere durch ihre ausgezeichnete Härte und Glätte aus.If the oven muffle is made of aluminum, the protective layer can be anodized, in particular hard anodized aluminum oxide layer. This oxide layer is particularly characterized by its excellent hardness and smoothness.

Ein besonders guter Wärmeübergang vom Heizelement zur Muffelwand bzw. zum Garraum und eine diesbezüglich hervorragende Wärmeverteilung ist dadurch erreichbar, daß die Muffelwand eine isolierende Schutzschicht im µm-Bereich aufweist, auf der das Heizelement mittels Dickschichttechnik direkt aufgebracht ist. Gegebenenfalls kann das Heizelement auch mit aufwendigeren Beschichtungsverfahren, beispielsweise der Dünnschichttechnik, realisiert sein. A particularly good heat transfer from the heating element to the muffle wall or to the cooking space and an excellent heat distribution can be achieved in that the muffle wall has an insulating protective layer in the µm range on which the heating element is applied directly using thick film technology. If necessary, the heating element also with more complex coating processes, for example thin-film technology, be realized.

Aufgrund der dünnen Schutzschichten treten beim Aufheizen der Backofenmuffel trotz der unterschiedlichen Wärmeausdehnungskoeffizienten der Schutzschicht und der Muffelwand lediglich geringe Spannungen in der Backofenmuffel auf. Deshalb kann die Stärke der Muffelwand auch auf beispielsweise etwa 0,4 mm verringert werden.Due to the thin protective layers occur when heating up the oven muffle despite the different coefficients of thermal expansion of the protective layer and the muffle wall only slight tensions in the oven muffle. Therefore, the strength the muffle wall can also be reduced to, for example, about 0.4 mm.

Gemäß einer bevorzugten Ausführungsform ist die Backofenmuffel durch einen Stabilisierungsrahmen von außen abgestützt. Dies ist insbesondere dann wichtig, wenn die Dicke der Muffelwand nur etwa 0,3 bis 0,5 mm beträgt. Durch diese nahezu Halbierung der Wandstärke der Backofenmuffel im Vergleich zum bisher bekannten Stand der Technik werden die Aufheizzeiten und die Wärmeverteilung weiterhin deutlich verbessert. Zudem kann durch die geringe Materialstärke Material eingespart werden. Außerdem wird das Gewicht der Backofenmuffel deutlich reduziert.According to a preferred embodiment, the oven muffle is provided with a stabilizing frame supported from the outside. This is especially important if the thickness the muffle wall is only about 0.3 to 0.5 mm. By this almost halving the Wall thickness of the oven muffle compared to the previously known prior art the heating-up times and heat distribution will continue to be significantly improved. moreover can be saved due to the low material thickness. Besides, that will Weight of the oven muffle significantly reduced.

Gemäß einer bevorzugten Ausführungsform ist der Stabilisierungsrahmen im wesentlichen durch eine Backofenisolation gebildet. Diese muß zum einen ausreichend nachgiebig sein, um die räumliche Vergrößerung der Backofenmuffel beim Aufheizen mitmachen zu können, und zum anderen steif genug sein, um die dünnwandige Backofenmuffel ausreichend stabilisieren zu können. Es zeigen:

Fig. 1 bis Fig. 4
in perspektivischen Ansichten von vorne die Backofenmuffel nach verschiedenen Verfahrensschritten zu deren Herstellung.
According to a preferred embodiment, the stabilizing frame is essentially formed by oven insulation. On the one hand, this must be sufficiently flexible to be able to participate in the spatial enlargement of the oven muffle when heating up, and on the other hand it must be stiff enough to be able to sufficiently stabilize the thin-walled oven muffle. Show it:
1 to 4
in perspective views from the front of the oven muffle after various process steps for their manufacture.

Fig. 1 zeigt eine quaderförmige Backofenmuffel 1 aus Edelstahl mit fünf Muffelwänden 3. Dies sind die beiden Seitenwände, eine Boden- und eine Deckwand sowie eine Rückwand. Die Beschickungsöffnung der Backofenmuffel 1 umzieht ein Muffelflansch 5. Die Backofenmuffel 1 ist einstückig in einem Hydroumformverfahren hergestellt. Bei diesem Tiefziehverfahren weist die Backofenmuffel im Unterschied zu herkömmlichen mechanisch tiefgezogenen Teilen Mängel, wie ungleichmäßige und große Wanddickenveränderungen, sichtbare Ziehspuren und einen Ziehwulst, sowie verminderte Oberflächenqualität und verminderte Formgenauigkeit nicht auf. Mit Hilfe der Sol-Gel-Technologie werden in einem Tauch- oder Spritzverfahren eine Muffelinnenseite 7 und eine Muffelaußenseite 9 mit einer Sol-Gel-Schicht 11 beschichtet (Fig. 2). Dabei wird aus einer Lösung (Sol) durch kontrollierte Kondensationsmethoden ein kolloides System im Mikrometer-Maßstab (Gel) erzeugt. Dieses Gel wird durch Trocknen infolge Lösungsmittelentzug verdichtet und anschließend in geeigneter Weise ausgehärtet bzw. bei einer Temperatur von etwa 450 bis 500°C eingebrannt. Während dieses Prozesses wird die Sol-Gel-Schicht über chemische Verbindungen mit dem Untergrund besonders fest verbunden. Die dabei entstehende Sol-Gel-Schicht ist etwa 10 µm dick und bildet auf der Muffelwand 3 aus Edelstahl beidseitig eine harte Oberfläche mit elektrischen Isolationseigenschaften. Weiterhin bildet sie einen Anlauf- und Oxidationsschutz für das Edelstahl. Auf die Sol-Gel-Hartschicht sind in zumindest einem weiteren Prozeßschritt in Sol-Gel-Technik Funktionalschichten auf verschiedene Bereiche der Muffelinnenseite 7 aufgebracht. Abhängig vom Ort in der Backofenmuffel 1 sind durch die Sol-Gel-Funktionalschichten insbesondere Antihaft-, Gleit- und Katalyseeigenschaften bereitgestellt. Die Sol-Gel-Funktionalschichten haben dabei eine Dicke von etwa 3 µm. Die aus den beiden Sol-Gel-Schichten 11 gebildete Schutzschicht ist derart transparent, daß die zur Zubereitung von Speisen relevante Wärmestrahlung im Infrarot- bzw. im sichtbaren Licht-Bereich die Schutzschicht durchdringen kann und von der Edelstahloberfläche ins Muffelinnere optimal reflektiert werden kann (Fig. 2). Bei Bedarf ist auch eine transparente oder deckende Einfärbung der Schichten möglich.Fig. 1 shows a rectangular oven muffle 1 made of stainless steel with five muffle walls 3. These are the two side walls, a bottom and a top wall and one Back wall. The loading opening of the oven muffle 1 moves a muffle flange 5. The oven muffle 1 is made in one piece in a hydroforming process. at This deep-drawing process shows the oven muffle in contrast to conventional ones mechanical deep-drawn parts defects, such as uneven and large changes in wall thickness, visible traces of drawing and a bead, as well as reduced Surface quality and reduced shape accuracy do not show up. With the help of sol-gel technology are a muffle inside 7 and a muffle outside 9 coated with a sol-gel layer 11 (Fig. 2). Doing so a colloidal system from a solution (sol) using controlled condensation methods produced on a micrometer scale (gel). This gel is made by drying Solvent removal compressed and then cured in a suitable manner or baked at a temperature of around 450 to 500 ° C. During this process the sol-gel layer is connected to the substrate via chemical compounds particularly firmly connected. The resulting sol-gel layer is about 10 µm thick and forms a hard surface with electrical on both sides of the stainless steel muffle wall 3 Insulating properties. It also forms a tarnish and oxidation protection for the stainless steel. The sol-gel hard layer are in at least one more Process step in sol-gel technology Functional layers on different areas of the Muffle inside 7 applied. Depending on the location in the oven muffle 1 are through the sol-gel functional layers in particular non-stick, sliding and catalyzing properties provided. The sol-gel functional layers have a thickness of about 3 µm. The protective layer formed from the two sol-gel layers 11 is of this type transparent that the heat radiation relevant for the preparation of food is in the infrared or can penetrate the protective layer in the visible light area and from the Stainless steel surface can be optimally reflected into the muffle interior (Fig. 2). If necessary transparent or opaque coloring of the layers is also possible.

Auf die Sol-Gel-Hartschicht sind in einem nachfolgenden Verfahrensschritt auf der Muffelaußenseite 9 mäanderförmige Heizleiter 13 in Dickschichttechnik aufgetragen (Fig. 3). Aufgrund der besonders dünnen Isolationsschicht zwischen dem Heizleiter 13 und der Muffelwand 3 ist ein besonders günstiger und gleichmäßiger Wärmeübergang möglich. Die Heizleiter 13 können über Leiteranschlüsse 15 mit elektrischer Spannung versorgt werden.The sol-gel hard layer is in a subsequent process step Muffle outside 9 meandering heating conductor 13 applied in thick-film technology (Fig. 3). Due to the particularly thin insulation layer between the heating conductor 13 and the muffle wall 3 is a particularly cheap and uniform heat transfer possible. The heating conductors 13 can be connected to electrical connections via conductor connections 15 be supplied.

Gemäß Fig. 4 ist die Backofenmuffel 1 schließlich in eine Muffelisolation 17 aus faserfreiem Isolationsmaterial, z.B. Perlite, eingebettet. Durch den Isolationsmantel ist die Backofenmuffel 1, deren Wandstärke lediglich 0,4 mm beträgt, stabilisiert. Weiterhin ist die Isolationsschale 17 ausreichend nachgiebig gestaltet, um bei der thermischen Ausdehnung der Backofenmuffel 1 beim Aufheizen während eines Backvorgangs nicht zu reißen.4, the oven muffle 1 is finally in a muffle insulation 17 made of fiber-free Insulation material, e.g. Perlite, embedded. Due to the insulation jacket is the oven muffle 1, the wall thickness of which is only 0.4 mm, stabilized. Furthermore, the Insulation shell 17 designed sufficiently resilient to thermal expansion not to tear the oven muffle 1 when heating up during a baking process.

Claims (5)

Backofen mit einer frontseitig durch eine Tür verschließbaren metallischen Backofenmuffel, deren Muffelwände Heizelemente zum Beheizen des Garraumes auf über etwa 180 °C bzw. des darin angeordneten Gargutes zugeordnet sind, mit einer die Muffelwände zumindest an der Innenseite bedeckenden Schutzschicht, wobei die Stärke der Schutzschicht (11) geringer als etwa 30 µm ist, dadurch gekennzeichnet, dass die Schutzschicht als Sol-Gel-Hartschicht (11) realisiert ist, und dass auf der Sol-Gel-Hartschicht eine Sol-Gel-Funktionalschicht (11) vorgesehen ist, die verschiedene Bereiche der Muffelwände mit besonderen Eigenschaften ausstattet.Oven with a metallic oven muffle that can be closed at the front by a door, the muffle walls of which are assigned heating elements for heating the cooking space to above about 180 ° C. 11) is less than about 30 µm, characterized in that the protective layer is implemented as a hard sol-gel layer (11), and that a sol-gel functional layer (11) is provided on the hard sol-gel layer, which different Equipped areas of the muffle walls with special properties. Backofen nach Anspruch 1, dadurch gekennzeichnet , dass unterschiedliche Flächenbereiche der Muffelwände (3) unterschiedliche Funktionalschichten aufweisen.Baking oven according to claim 1, characterized in that different surface areas of the muffle walls (3) have different functional layers. Backofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Muffelwand zumindest zum Teil eine isolierende Schutzschicht aufweist, auf der das Heizelement (13) mittels Dickschichttechnik aufgebracht ist.Baking oven according to one of the preceding claims, characterized in that the muffle wall has at least in part an insulating protective layer on which the heating element (13) is applied by means of thick-film technology. Backofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Stabilisierungsrahmen die Backofenmuffel (1) von außen stützt, und dass der Stabilisierungsrahmen im wesentlichen durch eine Backofenmuffelisolation (17) gebildet ist.Baking oven according to one of the preceding claims, characterized in that a stabilizing frame supports the oven muffle (1) from the outside, and that the stabilizing frame is essentially formed by an oven muffle insulation (17). Backofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Dicke der Muffelwand (3) etwa 0,3 bis 0,5 mm beträgt.Baking oven according to one of the preceding claims, characterized in that the thickness of the muffle wall (3) is approximately 0.3 to 0.5 mm.
EP02017745A 1998-03-27 1999-03-26 Baking oven with a baking oven muffle Expired - Lifetime EP1255083B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19813787 1998-03-27
DE19813787A DE19813787A1 (en) 1998-03-27 1998-03-27 Oven with muffle
EP99917868A EP1064502B1 (en) 1998-03-27 1999-03-26 Baking oven with a baking oven muffle

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP99917868A Division EP1064502B1 (en) 1998-03-27 1999-03-26 Baking oven with a baking oven muffle

Publications (2)

Publication Number Publication Date
EP1255083A1 true EP1255083A1 (en) 2002-11-06
EP1255083B1 EP1255083B1 (en) 2005-02-09

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EP02017745A Expired - Lifetime EP1255083B1 (en) 1998-03-27 1999-03-26 Baking oven with a baking oven muffle
EP99917868A Revoked EP1064502B1 (en) 1998-03-27 1999-03-26 Baking oven with a baking oven muffle

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EP99917868A Revoked EP1064502B1 (en) 1998-03-27 1999-03-26 Baking oven with a baking oven muffle

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US (1) US6392203B1 (en)
EP (2) EP1255083B1 (en)
JP (1) JP2002510029A (en)
KR (1) KR20010034651A (en)
AT (1) ATE232952T1 (en)
DE (3) DE19813787A1 (en)
ES (2) ES2237637T3 (en)
PL (1) PL343159A1 (en)
TR (1) TR200002585T2 (en)
WO (1) WO1999050601A1 (en)

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JP3381154B2 (en) * 2000-02-25 2003-02-24 修 山崎 Boiled egg-like food production equipment
EP1382226B1 (en) * 2001-04-17 2005-11-23 Koninklijke Philips Electronics N.V. Insulating layer for a heating element
DE20107564U1 (en) 2001-05-03 2001-08-16 Mapa GmbH Gummi- und Plastikwerke, 27404 Zeven Device for heating food
DE10247192B4 (en) 2002-10-10 2018-11-22 BSH Hausgeräte GmbH Extractor for a household appliance
US20030138661A1 (en) * 2003-02-19 2003-07-24 Ferro Corporation Sol-gel composition and method of making same
US20050047584A1 (en) * 2003-08-26 2005-03-03 Capital One Financial Corporation System and method for customized intelligent contact routing
US7132628B2 (en) * 2004-03-10 2006-11-07 Watlow Electric Manufacturing Company Variable watt density layered heater
USD569491S1 (en) 2007-07-02 2008-05-20 Saint-Gobain Ceramics & Plastics, Inc. Interconnecting muffle
ITPD20070420A1 (en) * 2007-12-20 2009-06-21 Unox S R L MUFFLE FURNACE STRUCTURE, PARTICULARLY FOR COOKING FOOD PRODUCTS
DE102008025886A1 (en) * 2008-05-29 2009-12-03 Schott Ag oven muffle
EP2405204B1 (en) * 2010-07-09 2017-10-11 Electrolux Home Products Corporation N.V. A front frame for an oven cavity of a cooking oven
ES2385156B1 (en) * 2010-12-22 2013-05-24 BSH Electrodomésticos España S.A. COOKING PRODUCT SUPPORT.
ES2385155B1 (en) * 2010-12-22 2013-05-24 BSH Electrodomésticos España S.A. Cooking flask
DE102014201639A1 (en) * 2014-01-30 2015-07-30 BSH Hausgeräte GmbH oven
DE102015224800A1 (en) 2015-12-10 2017-06-14 BSH Hausgeräte GmbH Muffle and household cooker
DE102017223680A1 (en) * 2017-12-22 2019-06-27 BSH Hausgeräte GmbH A high temperature resistant omniphobic nonstick coating article and method of making the article

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Also Published As

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ES2237637T3 (en) 2005-08-01
JP2002510029A (en) 2002-04-02
TR200002585T2 (en) 2000-11-21
EP1255083B1 (en) 2005-02-09
KR20010034651A (en) 2001-04-25
EP1064502B1 (en) 2003-02-19
DE19813787A1 (en) 1999-09-30
DE59911624D1 (en) 2005-03-17
ES2193696T3 (en) 2003-11-01
US6392203B1 (en) 2002-05-21
WO1999050601A1 (en) 1999-10-07
ATE232952T1 (en) 2003-03-15
DE59904331D1 (en) 2003-03-27
EP1064502A1 (en) 2001-01-03
PL343159A1 (en) 2001-07-30

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