EP0995951B1 - Baking oven with means for pyrolitic self-cleaning - Google Patents
Baking oven with means for pyrolitic self-cleaning Download PDFInfo
- Publication number
- EP0995951B1 EP0995951B1 EP99120167A EP99120167A EP0995951B1 EP 0995951 B1 EP0995951 B1 EP 0995951B1 EP 99120167 A EP99120167 A EP 99120167A EP 99120167 A EP99120167 A EP 99120167A EP 0995951 B1 EP0995951 B1 EP 0995951B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- baking oven
- muffle
- oven
- heating element
- base
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
- F24C14/02—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type
Definitions
- the present invention relates to an oven according to the preamble of Claim 1.
- From US-A-3 530 847 is a generic oven with a self-cleaning function known.
- the oven has a lower convection heater and an upper one Radiant heating element for heating a cooking space of the oven to a temperature which is sufficiently large for pyrolytic self-cleaning.
- Such an oven is also known from the publication US 3,668,371, in which Cooking space below the top wall and above the bottom wall of the muffle Tubular heating element is provided for cooking. In self-cleaning mode, that will be first heating element disconnected from the mains, while the second heating element on mains voltage is laid.
- the focus of the oven muffle is about a temperature 320 ° C in contrast to that otherwise normally achieved in pyrolysis operation Center temperature of 450 ° C.
- the with the according to the publication US 3,668,371 significantly reduced center of gravity associated relatively low Muffle wall temperatures are, however, in the area of the less soiled muffle side walls sufficiently large for a cleaning.
- This temperature is suitable for the Usually heavily soiled bottom area of the oven muffle pyrolytically to be able to clean.
- the object of the present invention is in an oven according to the preamble of Claim 1 to facilitate cleanability.
- this is in an oven according to the preamble of the claim thereby those listed in the characterizing part of claim 1 Characteristics achieved.
- the one remaining in the oven muffle after the pyrolysis process Ash can be removed from the bottom wall in a particularly simple manner or respectivelyzuwischen.
- the adverse corners and spaces between the Second radiators and the bottom wall according to the prior art are omitted according to the invention.
- Through the shielding of the second heating element Bottom wall compared to the cooking space a greater temperature difference between the Bottom wall and the side walls or the top wall of the muffle during pyrolysis operation adjustable.
- the thermal coupling of the second heating element to the floor panel or on the bottom wall is improved according to the invention in that both are thermally connected to each other.
- the heating element can advantageously For example, be implemented directly on the floor panel using thick-film technology.
- the bottom wall is advantageously approximately 0.5 mm thick.
- the bottom wall By forming the bottom wall as a separate part, it is possible to have a smaller wall thickness than that of the oven muffle to choose to use a different material or to use the floor pan special dirt-repellent layers. Due to the low heat capacity the bottom wall reduces the power requirement in pyrolysis operation. Farther is the energy requirement for a cooking process, which also includes the second heating element is switched on, reduced compared to thicker bottom wall thicknesses.
- the oven muffle has a closed one Floor
- the second heating element is arranged above the floor, and is above the second heating element, the bottom wall in the form of a particular from Muffle removable floor plate arranged.
- the closed bottom of the oven muffle guarantees that the cooking space is completely sealed bottom as well as additional thermal insulation with respect to the radiated down Heat radiation from the second heating element.
- a removable floor panel offers also advantages when cleaning the oven.
- the second heating element is slightly spaced from the bottom of the oven muffle.
- the arrangement of a reflector element between serves the same purpose the second heating element and the bottom of the oven muffle. In both cases Heating up the oven muffle base and transferring the heat to the others Walls of the oven muffle significantly reduced.
- the Bottom wall essentially via point or line-shaped contact points in the Oven muffle held.
- the drainage in the floor wall or in the floor panel Heat absorbed into the walls of the oven muffle can be avoided by this measure be significantly reduced.
- the oven muffle has a catalytic coating.
- these areas of the muffle wall with a special easy to clean layer are coated. This can be done, for example, through special Enamel or sol-gel layers can be realized.
- an oven has a housing 1 in which a cuboid oven muffle 3 defining a cooking space is held (FIG. 1). This is open on the front and with one articulated on the housing 1 or the muffle 3 Oven door 5 lockable.
- the oven muffle 3 has a heat insulation layer on all sides 7 surrounded.
- Here is the amount of insulation material or the requirement to the insulation properties of the heat insulation layer 7 due to the pyrolysis operation occurring low operating temperatures, as explained below, in comparison to conventional ovens with an external bottom heat radiator reduced.
- Below the ceiling of the oven muffle 3 is an upper heat radiator 9 and Above the oven base 12 there is a lower heat radiator 11 at a distance from it supported.
- the top of the oven bottom 12 is the heat radiation of the Underheating radiator 11 reflective metal layer 13 covered.
- the reflective property also by a suitable inserted in the oven muffle 3 Reflector plate can be realized.
- the distance between the lower heat radiator 11 and the oven floor 12 or the reflector layer 13 is over their entire Area at least a few mm.
- the oven base 12 has embossments distributed over its surface, on which the Lower heat radiator 11 rests essentially at a point.
- the bottom heat radiator 11 or the oven base 12 is completely removable by a in the oven muffle 3 covered bottom plate 15 covered.
- the wall thickness the bottom plate 15 is about 0.4-0.5 mm.
- the bottom plate 15 can both on the Be held inside the oven door 5, especially if it is in the form of a known baking cart is formed, can on the side walls or the rear wall the oven muffle 3 can be held in known groove baking tubes or in a special provided in the oven muffle 3 known food support frame or be held in the muffle side walls of the guide grids.
- the base plate 15 not to be removable from the oven muffle 3 to attach.
- the bottom plate 15 has the smoothest possible surface contour to make it easier to wipe out pyrolysis residues.
- a food support 17 can be held in the oven muffle 3 at different heights.
- a control unit 21 can be used to operate the oven by means of an operating unit 19 Pyrolysis or cooking mode request can be communicated.
- the control unit 19 Pyrolysis or cooking mode request can be communicated.
- the control unit 19 the control unit 21, the radiators 9, 11 and other functional elements known per se ovens, such as a cooking space temperature sensor, via connecting lines 23 connected.
- the lower heat radiator 11 is due to the thin bottom plate 15 shielded from the food.
- the extent of thermal shielding is, however, less than in the case of the known arrangement of a bottom heat radiator outside the oven muffle 3 below the oven base 12.
- the control unit 21 switches the top heat radiator 9 off and operates it the lower heat radiator 11 at full power. This results in heating of the bottom plate 15 to about 500 ° C, while the oven temperature remains below 350 ° C.
- the primary contamination area of the oven muffle 3, namely the bottom plate 15 is cleaned pyrolytically. Due to the low thermal Mass of the bottom plate 15, the poor thermal coupling to the Walls of the oven muffle 3 or the arrangement of the reflector layer 13 is thereby electrical energy saved.
- FIG. 2 that differ from the first exemplary embodiment of an oven according to the second embodiment is trough-shaped Floor plate 15 on its underside with a serving as a bottom heat radiator 11 Provide tubular heater. This is via plug connections not shown in the Area of the rear wall of the oven muffle 3 electrically contactable. If this connector is designed to be sufficiently stable, it can be used to hold the lower heat body alone be used in the oven muffle.
- this connector In the side walls of the oven muffle 3 formed horizontal guide grooves 31 is shown in FIG. 2 the bottom plate 15 can be inserted stably at a distance from the reflector layer 13. The end section of an unflanged side wall region 33 of the base plate rests 15 linearly on a guide surface of the groove 31.
- the control unit 21 detects the presence of the lower heat radiator 11 or its ohmic resistance and thus the bottom plate 15 in the oven muffle 3.
- a cooking or pyrolysis operation only possible when the control unit 21 determines the presence of the floor plate 15.
- the shielding of the lower heat radiator 11 by the thin and thermal bottom plate 15 weakly coupled to the oven muffle walls can large temperature differences between the primary pollution area in a particularly simple manner - the floor panel - and the secondary pollution areas - the top and side walls - can be adjusted.
- the leads in particular weak thermal coupling of the bottom plate 15 to the walls of the oven muffle 3 low energy consumption in pyrolysis operation.
- a circulating air fan not shown, remains essentially switched off.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Baking, Grill, Roasting (AREA)
- Electric Stoves And Ranges (AREA)
- Physical Vapour Deposition (AREA)
Abstract
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
Aus der US-A-3 530 847 ist ein gattungsgemäßer Backofen mit Selbstreinigungsfunktion bekannt. Der Backofen weist einen unteren Konvektionsheizkörper und einen oberen Strahlungsheizkörper zum Beheizen eines Garraumes des Ofens bis zu einer Temperatur auf, die zur pyrolytischen Selbstreinigung ausreichend groß ist.From US-A-3 530 847 is a generic oven with a self-cleaning function known. The oven has a lower convection heater and an upper one Radiant heating element for heating a cooking space of the oven to a temperature which is sufficiently large for pyrolytic self-cleaning.
Ein derartiger Backofen ist auch bekannt aus der Druckschrift US 3,668,371, wobei im Garraum unterhalb der Deckwand und oberhalb der Bodenwand der Muffel jeweils ein Rohrheizkörper für den Garbetrieb vorgesehen ist. Beim Selbstreinigungsbetrieb wird das erste Heizelement vom Netz getrennt, während das zweite Heizelement an Netzspannung gelegt ist. Dabei stellt sich im Schwerpunkt der Backofenmuffel eine Temperatur von etwa 320°C im Unterschied zu der beim Pyrolysebetrieb ansonsten üblicherweise erreichten Schwerpunktstemperatur von 450°C ein. Die mit der gemäß der Druckschrift US 3,668,371 deutlich reduzierten Schwerpunktstemperatur verbundenen relativ niedrigen Muffelwandtemperaturen sind jedoch im Bereich der weniger verschmutzten Muffelseitenwände und -deckwand für eine Reinigung ausreichend groß. Infolge der unmittelbaren räumlichen Nähe des zweiten Heizelementes zur Bodenwand wird diese deutlich stärker aufgeheizt, typischerweise auf bis zu etwa 450°C. Diese Temperatur ist geeignet, um den üblicherweise stärker verschmutzten Bodenbereich der Backofenmuffel pyrolytisch reinigen zu können.Such an oven is also known from the publication US 3,668,371, in which Cooking space below the top wall and above the bottom wall of the muffle Tubular heating element is provided for cooking. In self-cleaning mode, that will be first heating element disconnected from the mains, while the second heating element on mains voltage is laid. The focus of the oven muffle is about a temperature 320 ° C in contrast to that otherwise normally achieved in pyrolysis operation Center temperature of 450 ° C. The with the according to the publication US 3,668,371 significantly reduced center of gravity associated relatively low Muffle wall temperatures are, however, in the area of the less soiled muffle side walls sufficiently large for a cleaning. As a result of the immediate spatial proximity of the second heating element to the floor wall, this becomes significantly stronger heated, typically up to about 450 ° C. This temperature is suitable for the Usually heavily soiled bottom area of the oven muffle pyrolytically to be able to clean.
Aufgabe der vorliegenden Erfindung ist es, bei einem Backofen nach dem Oberbegriff des
Patentanspruches 1 die Reinigbarkeit zu erleichtern.The object of the present invention is in an oven according to the preamble of
Erfindungsgemäß ist dies bei einem Backofen nach dem Oberbegriff des Patentanspruches
dadurch
die im kennzeichnenden Teil von Anspruch 1 aufgeführten
Merkmale erreicht.
Die nach dem Pyrolysevorgang in der Backofenmuffel zurückbleibende
Asche ist aus der Bodenwand in besonders einfacher Weise zu entfernen bzw.
herauszuwischen. Die nachteiligen Ecken und Zwischenraumbereiche zwischen dem
zweiten Heizkörper und der Bodenwand gemäß dem Stand der Technik entfallen erfindungsgemäß.
Zudem ist durch die Abschirmung des zweiten Heizelementes durch die
Bodenwand gegenüber dem Garraum ein größerer Temperaturunterschied zwischen der
Bodenwand und den Seitenwänden bzw. der Deckwand der Muffel beim Pyrolysebetrieb
einstellbar. Die thermische Ankopplung des zweiten Heizelementes an das Bodenblech
bzw. an die Bodenwand wird erfindungsgemäß dadurch verbessert, dass beide
miteinander thermisch leitend verbunden sind. Vorteilhafterweise kann das Heizelement
beispielsweise in Dickschichttechnik direkt auf dem Bodenblech realisiert sein.According to the invention, this is in an oven according to the preamble of the claim
thereby
those listed in the characterizing part of
Vorteilhafter Weise ist die Bodenwand etwa 0,5 mm stark. Durch die Ausbildung der Bodenwand als separates Teil ist es möglich, eine geringere Wandstärke als die der Backofenmuffel zu wählen, ein anderes Material zu verwenden oder das Bodenblech mit speziellen schmutzabweisenden Schichten zu versehen. Durch die geringe Wärmekapazität der Bodenwand wird der Leistungsbedarf beim Pyrolysebetrieb reduziert. Weiterhin ist der Energiebedarf bei einem Garprozess, bei dem auch das zweite Heizelement eingeschaltet ist, im Vergleich zu stärkeren Bodenwanddicken herabgesetzt.The bottom wall is advantageously approximately 0.5 mm thick. By forming the bottom wall as a separate part, it is possible to have a smaller wall thickness than that of the oven muffle to choose to use a different material or to use the floor pan special dirt-repellent layers. Due to the low heat capacity the bottom wall reduces the power requirement in pyrolysis operation. Farther is the energy requirement for a cooking process, which also includes the second heating element is switched on, reduced compared to thicker bottom wall thicknesses.
Gemäß einer bevorzugten Ausführungsform besitzt die Backofenmuffel einen geschlossenen Boden, ist oberhalb des Bodens das zweite Heizelement angeordnet, und ist oberhalb des zweiten Heizelementes die Bodenwand in Form eines insbesondere aus der Muffel herausnehmbaren Bodenbleches angeordnet. Der geschlossene Boden der Backofenmuffel .garantiert sowohl einen vollständig dichten Abschluss des Garraumes nach unten als auch eine zusätzliche Wärmeisolation bezüglich der nach unten abgestrahlten Wärmestrahlung des zweiten Heizelementes. Ein herausnehmbares Bodenblech bietet zudem Vorteile bei der Reinigung des Backofens. Zur Verringerung der Wärmeverluste des Backofens ist das zweite Heizelement vom Boden der Backofenmuffel geringfügig beabstandet. Dem selben Zweck dient die Anordnung eines Reflektorelementes zwischen dem zweiten Heizelement und dem Boden der Backofenmuffel. In beiden Fällen wird das Aufheizen des Backofenmuffelbodens und das Weiterleiten der Wärme in die anderen Wände der Backofenmuffel deutlich verringert.According to a preferred embodiment, the oven muffle has a closed one Floor, the second heating element is arranged above the floor, and is above the second heating element, the bottom wall in the form of a particular from Muffle removable floor plate arranged. The closed bottom of the oven muffle . guarantees that the cooking space is completely sealed bottom as well as additional thermal insulation with respect to the radiated down Heat radiation from the second heating element. A removable floor panel offers also advantages when cleaning the oven. To reduce heat loss of the oven, the second heating element is slightly spaced from the bottom of the oven muffle. The arrangement of a reflector element between serves the same purpose the second heating element and the bottom of the oven muffle. In both cases Heating up the oven muffle base and transferring the heat to the others Walls of the oven muffle significantly reduced.
Um den Energiebedarf insbesondere beim Pyrolysebetrieb gering zu halten, ist die Bodenwand im wesentlichen über punkt- bzw. linienförmige Kontaktstellen in der Backofenmuffel gehaltert. Das Abfließen der in der Bodenwand bzw. im Bodenblech aufgenommenen Wärme in die Wände der Backofenmuffel kann durch diese Maßnahme deutlich reduziert werden.In order to keep the energy requirement low, especially in pyrolysis operation, the Bottom wall essentially via point or line-shaped contact points in the Oven muffle held. The drainage in the floor wall or in the floor panel Heat absorbed into the walls of the oven muffle can be avoided by this measure be significantly reduced.
Zur weiteren Verbesserung des Reinigungsverhaltens des Backofens ist vorteilhafter Weise vorgesehen, dass zumindest Teilbereiche der Seitenwände bzw. der Deckwand der Backofenmuffel eine katalytische Beschichtung aufweisen. Alternativ oder ergänzend kann auch vorgesehen sein, dass diese Bereiche der Muffelwand mit einer besonders leicht zu reinigenden Schicht beschichtet sind. Dies kann beispielsweise durch spezielle Email- oder Sol-Gel-Schichten realisiert sein.To further improve the cleaning behavior of the oven is more advantageous Provided that at least partial areas of the side walls or the top wall the oven muffle has a catalytic coating. Alternatively or in addition can also be provided that these areas of the muffle wall with a special easy to clean layer are coated. This can be done, for example, through special Enamel or sol-gel layers can be realized.
Nachfolgend sind anhand schematischer Darstellungen zwei Ausführungsbeispiele des erfindungsgemäßen Backofens beschrieben.Below are two exemplary embodiments of the described baking oven according to the invention.
Es zeigen:
- Fig. 1
- in einer Seitenansicht teilweise in Schnittdarstellung stark vereinfacht einen Backofen gemäß dem ersten Ausführungsbeispiel und
- Fig. 2
- vereinfacht in Schnittdarstellung im wesentlichen entlang der Linie II-II in Fig. 1 in vergrößertem Maßstab ausschnittsweise einen Backofen gemäß dem zweiten Ausführungsbeispiel.
- Fig. 1
- a side view, partly in section, greatly simplifies an oven according to the first embodiment and
- Fig. 2
- Simplified in a sectional view essentially along the line II-II in Fig. 1 in an enlarged scale a portion of an oven according to the second embodiment.
Gemäß dem ersten Ausführungsbeispiel weist ein Backofen ein Gehäuse 1 auf, in dem
eine einen Garraum begrenzende, quaderförmige Backofenmuffel 3 gehaltert ist (Fig. 1).
Diese ist frontseitig offen und mit einer am Gehäuse 1 bzw. der Muffel 3 angelenkten
Backofentür 5 verschließbar. Die Backofenmuffel 3 ist allseitig von einer Wärmeisolationsschicht
7 umgeben. Dabei ist die Menge des Isolationsmaterial bzw. die Anforderung
an die Isolationseigenschaften der Wärmeisolationsschicht 7 aufgrund der im Pyrolysebetrieb
auftretenden niedrigen Betriebstemperaturen, wie nachfolgend erläutert ist, im Vergleich
zu herkömmlichen Backöfen mit außenliegendem Unterhitze-Heizkörper deutlich
reduziert. Unterhalb der Decke der Backofenmuffel 3 ist ein Oberhitzeheizkörper 9 und
oberhalb des Backofenbodens 12 ist mit Abstand zu diesem ein Unterhitzeheizkörper 11
gehaltert. Die Oberseite des Backofenbodens 12 ist mit einer die Wärmestrahlung des
Unterhitzeheizkörpers 11 reflektierenden Metallschicht 13 bedeckt. Alternativ kann die
reflektierende Eigenschaft auch durch ein in die Backofenmuffel 3 eingelegtes geeignetes
Reflektorblech realisiert sein. Der Abstand zwischen dem Unterhitzeheizkörper 11 und
dem Backofenboden 12 bzw. der Reflektorschicht 13 beträgt über deren gesamte
Flächenausdehnung zumindest einige mm. Alternativ kann auch vorgesehen sein, daß
der Backofenboden 12 über seine Fläche verteilt Prägungen aufweist, auf denen der
Unterhitzeheizkörper 11 im wesentlichen punktförmig aufliegt.According to the first exemplary embodiment, an oven has a
Der Unterhitzeheizkörper 11 bzw. der Backofenboden 12 ist vollständig durch ein herausnehmbar
in der Backofenmuffel 3 gehaltertes Bodenblech 15 bedeckt. Die Wandstärke
des Bodenbleches 15 beträgt etwa 0,4 - 0,5 mm. Das Bodenblech 15 kann sowohl an der
Innenseite der Backofentür 5 gehaltert sein, insbesondere wenn diese in Form eines an
sich bekannten Backwagens ausgebildet ist, kann an den Seitenwänden oder der Rückwand
der Backofenmuffel 3 in an sich bekannten Rillenbackrohren gehaltert sein oder in
einem speziellen in der Backofenmuffel 3 vorgesehenen an sich bekannten Gargutträgergestell
oder in den Muffelseitenwänden einhängbaren Führungsgittern gehaltert sein.
Alternativ ist es auch möglich, das Bodenblech 15 nicht herausnehmbar an der Backofenmuffel
3 zu befestigen. Das Bodenblech 15 weist eine möglichst glatte Oberflächenkontur
auf, um das Auswischen von Pyrolyserückständen zu erleichtern. Oberhalb des Bodenblechs
15 ist in verschiedenen Höhen ein Gargutträger 17 in der Backofenmuffel 3 halterbar.The
Zum Betrieb des Backofens kann mittels einer Bedieneinheit 19 einer Steuereinheit 21 ein
Pyrolysebetrieb- oder Garbetriebwunsch mitgeteilt werden. Dazu sind die Bedieneinheit
19, die Steuereinheit 21, die Heizkörper 9, 11 und weitere an sich bekannte Funktionselemente
von Backöfen, wie beispielsweise ein Garraum-Temperaturfühler, über Verbindungsleitungen
23 verbunden. Im Garbetrieb ist der Unterhitzeheizkörper 11 durch das
dünne Bodenblech 15 vom Gargut abgeschirmt. Das Ausmaß der thermischen Abschirmung
ist jedoch geringer als im Falle der an sich bekannten Anordnung eines Unterhitzeheizkörpers
außerhalb der Backofenmuffel 3 unterhalb des Backofenbodens 12. A
Durch die Reflektionsschicht 13 und die thermisch möglichst schwache Ankopplung des
Bodenbleches 15 an die Backofenmuffel 3 ist die Energiebilanz bei der Gestaltung des
Backofens gemäß dem ersten Ausführungsbeispiel deshalb vergleichsweise günstiger.
Im Pyrolysebetrieb schaltet die Steuereinheit 21 den Oberhitzeheizkörper 9 ab und betreibt
den Unterhitzeheizkörper 11 mit voller Leistung. Daraus ergibt sich eine Aufheizung
des Bodenbleches 15 auf etwa 500°C, während die Backofenschwerpunktstemperatur
geringer als 350°C bleibt. Der primäre Verschmutzungsbereich der Backofenmuffel 3,
nämlich das Bodenblech 15, wird dabei pyrolytisch gereinigt. Infolge der geringen thermischen
Masse des Bodenbleches 15, der schlechten thermischen Ankopplung an die
Wände der Backofenmuffel 3 bzw. der Anordnung der Reflektorschicht 13 wird dabei
elektrische Energie gespart. Hinzu kommt, daß aufgrund der geringen Schwerpunktstemperatur
in der Backofenmuffel 3 Maßnahmen zur an sich bekannten Türverriegelung im
Pyrolysebetrieb im Sinne der Sicherheitsvorschriften nicht mehr erforderlich sind. Um das
Reinigungsergebnis bzgl. der übrigen Wände der Backofenmuffel 3 sicherstellen zu
können, sind diese mit einer katalytischen Reinigungsschicht 25 bedeckt.Due to the
Gemäß den in Fig. 2 gezeigten vom ersten Ausführungsbeispiel abweichenden Details
eines Backofens nach dem zweiten Ausführungsbeispiel ist das wannenförmig ausgebildete
Bodenblech 15 an seiner Unterseite mit einem als Unterhitzeheizkörper 11 dienenden
Rohrheizkörper versehen. Dieser ist über nicht näher gezeigte Steckverbindungen im
Bereich der Rückwand der Backofenmuffel 3 elektrisch kontaktierbar. Falls diese Steckverbindung
ausreichend stabil gestaltet ist, kann sie zur alleinigen Halterung des Unterhitzekörpers
in der Backofenmuffel verwendet werden. In in den Seitenwänden der Backofenmuffel
3 ausgebildeten horizontal verlaufenden Führungsrillen 31 ist gemäß Fig. 2
das Bodenblech 15 einschiebbar mit Abstand von der Reflektorschicht 13 stabil gehaltert.
Dabei ruht der Endabschnitt eines ungebördelten Seitenwandbereiches 33 des Bodenbleches
15 linienförmig auf einer Führungsfläche der Rille 31. Die Steuereinheit 21 detektiert
die Anwesenheit des Unterhitzeheizkörpers 11 bzw. dessen ohmschen Widerstandes und
damit des Bodenbleches 15 in der Backofenmuffel 3. Ein Gar- oder Pyrolysebetrieb ist
erst möglich, wenn die Steuereinheit 21 das Vorhandensein des Bodenbleches 15 feststellt.
Infolge der Abschirmung des Unterhitzeheizkörpers 11 durch das dünne und thermisch
schwach an die Backofenmuffelwände angekoppelte Bodenblech 15 können auf
besonders einfache Weise große Temperaturunterschiede zwischen dem Primärverschmutzungsbereich
- das Bodenblech - und den Sekundärverschmutzungsbereichen -
die Deck- und Seitenwände - eingestellt werden. Zudem führt insbesondere die gezielt
schwache thermische Ankopplung des Bodenbleches 15 an die Wände der Backofenmuffel
3 einen geringen Energieverbrauch beim Pyrolysebetrieb. Während des Pyrolysebetriebes
bleibt ein nicht näher dargestelltes Umluftgebläse im wesentlichen abgeschaltet.According to the details shown in FIG. 2 that differ from the first exemplary embodiment
of an oven according to the second embodiment is trough-shaped
Claims (7)
- Baking oven with means for pyrolytic self-cleaning, a cooking space closable by a door and bounded by a baking oven muffle, a first heating element arranged in the cooking space below the top wall of the muffle and a second heating element, which is associated with the base wall and the heat output of which during pyrolytic operation is substantially greater than that of the first heating element, which base wall (15) is constructed as a separate part as well as is mounted in the base region of the baking oven muffle (3) above the second setting heating element (11) and covers this, characterised in that the base wall or the base plate (15) and the second heating element (11) are connected together.
- Baking oven according to claim 1, characterised in that the base wall (15) is at most approximately 0.5 mm thick.
- Baking oven according to claim 1 or 2, characterised in that the baking oven muffle (3) has a closed base (12), that the second heating element (11) is arranged above the base (12) and that the base wall (15) in the form of, in particular, a base plate withdrawable from the muffle (3) is arranged above the second heating element (11).
- Baking oven according to claim 3, characterised in that the second heating element (11) is spaced slightly from the base (12) of the baking oven muffle (3).
- Baking oven according to claim 3 or 4, characterised in that a reflector element (13) is arranged between the second heating element (11) and the base (12) of the baking oven muffle (3).
- Baking oven according to one of the preceding claims, characterised in that the base wall (15) is mounted in the baking oven muffle (3) substantially by way of punctiform or linear contact points (31, 33).
- Baking oven according to one of the preceding claims, characterised in that at least part regions of the side walls and/or the top wall of the baking oven muffle (3) have a catalytic coating (25).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19849040A DE19849040A1 (en) | 1998-10-23 | 1998-10-23 | Oven with means for pyrolytic self-cleaning |
| DE19849040 | 1998-10-23 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0995951A2 EP0995951A2 (en) | 2000-04-26 |
| EP0995951A3 EP0995951A3 (en) | 2001-07-04 |
| EP0995951B1 true EP0995951B1 (en) | 2004-07-21 |
Family
ID=7885489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99120167A Expired - Lifetime EP0995951B1 (en) | 1998-10-23 | 1999-10-08 | Baking oven with means for pyrolitic self-cleaning |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0995951B1 (en) |
| AT (1) | ATE271675T1 (en) |
| DE (2) | DE19849040A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2354667A2 (en) | 2010-01-29 | 2011-08-10 | Fagor, S. Coop. | Pyrolytic oven, preferably a domestic pyrolytic oven |
| DE102011010283A1 (en) | 2011-02-03 | 2012-08-09 | i-clean Technologies GmbH | Purifying household cooking appliance with cooking chamber for receiving attributable finished ready foods, comprises adding a cleaning solution A in a cooking chamber, and starting a first cleaning cycle |
| DE102013209707A1 (en) | 2013-05-24 | 2014-11-27 | BSH Bosch und Siemens Hausgeräte GmbH | KITCHEN EQUIPMENT WITH EASILY CLEANABLE SURFACES AND METHOD FOR THEIR APPLICATION |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10349312A1 (en) * | 2003-10-23 | 2005-05-25 | BSH Bosch und Siemens Hausgeräte GmbH | Method for self cleaning of electric baking oven has a baking tray positioned above the floor of the oven to form a small space separately heated by the lower heating coils for pyrolytic cleaning of the bottom of the oven |
| WO2009083390A1 (en) * | 2007-12-31 | 2009-07-09 | Arcelik Anonim Sirketi | An oven |
| DE102012224035A1 (en) * | 2012-12-20 | 2014-06-26 | BSH Bosch und Siemens Hausgeräte GmbH | Cooking appliance |
| DE102014201639A1 (en) | 2014-01-30 | 2015-07-30 | BSH Hausgeräte GmbH | oven |
| DE102017211289A1 (en) | 2017-07-03 | 2019-01-03 | BSH Hausgeräte GmbH | Cooking, roasting, baking or grilling device with functional coating, as well as process for renewal of the coating |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3353004A (en) * | 1964-10-09 | 1967-11-14 | Gen Motors Corp | Domestic electric appliance |
| US3530847A (en) * | 1968-04-02 | 1970-09-29 | Caloric Corp | Gas-fueled self-cleaning oven |
| US3668371A (en) * | 1971-06-16 | 1972-06-06 | Gen Motors Corp | Circuit arrangement for accelerated continuous cleaning of self cleaning oven coatings |
| FR2238119B2 (en) * | 1973-07-17 | 1976-04-30 | Cepem | |
| NO770418L (en) * | 1976-02-13 | 1977-08-16 | Witte & Co Stephan | MICROWAVE STOVE. |
| US5038748A (en) * | 1990-08-30 | 1991-08-13 | General Electric Company | Self-cleaning gas range having heat baffle assembly |
| US5387258A (en) * | 1991-12-30 | 1995-02-07 | Fulgor S.P.A. | Self-cleaning oven |
-
1998
- 1998-10-23 DE DE19849040A patent/DE19849040A1/en not_active Withdrawn
-
1999
- 1999-10-08 DE DE59909999T patent/DE59909999D1/en not_active Expired - Fee Related
- 1999-10-08 EP EP99120167A patent/EP0995951B1/en not_active Expired - Lifetime
- 1999-10-08 AT AT99120167T patent/ATE271675T1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2354667A2 (en) | 2010-01-29 | 2011-08-10 | Fagor, S. Coop. | Pyrolytic oven, preferably a domestic pyrolytic oven |
| DE102011010283A1 (en) | 2011-02-03 | 2012-08-09 | i-clean Technologies GmbH | Purifying household cooking appliance with cooking chamber for receiving attributable finished ready foods, comprises adding a cleaning solution A in a cooking chamber, and starting a first cleaning cycle |
| DE102013209707A1 (en) | 2013-05-24 | 2014-11-27 | BSH Bosch und Siemens Hausgeräte GmbH | KITCHEN EQUIPMENT WITH EASILY CLEANABLE SURFACES AND METHOD FOR THEIR APPLICATION |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0995951A2 (en) | 2000-04-26 |
| DE59909999D1 (en) | 2004-08-26 |
| EP0995951A3 (en) | 2001-07-04 |
| ATE271675T1 (en) | 2004-08-15 |
| DE19849040A1 (en) | 2000-04-27 |
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