EP0852317B1 - Cooking chamber with an air inlet and a heating element arrangement - Google Patents

Cooking chamber with an air inlet and a heating element arrangement Download PDF

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Publication number
EP0852317B1
EP0852317B1 EP19980105610 EP98105610A EP0852317B1 EP 0852317 B1 EP0852317 B1 EP 0852317B1 EP 19980105610 EP19980105610 EP 19980105610 EP 98105610 A EP98105610 A EP 98105610A EP 0852317 B1 EP0852317 B1 EP 0852317B1
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EP
European Patent Office
Prior art keywords
heating element
cooking chamber
air
film heating
air passage
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Expired - Lifetime
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EP19980105610
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German (de)
French (fr)
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EP0852317A1 (en
Inventor
Walter Schroeder
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Electrolux AG
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Electrolux AG
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Priority to EP19980105610 priority Critical patent/EP0852317B1/en
Priority to DE59809986T priority patent/DE59809986D1/en
Publication of EP0852317A1 publication Critical patent/EP0852317A1/en
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Publication of EP0852317B1 publication Critical patent/EP0852317B1/en
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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
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/325—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation electrically-heated

Definitions

  • the present invention relates to an oven with an air inlet according to the preamble of claim 1.
  • the air outlet may be the above-mentioned suction opening act for air from the oven, but above Outlet openings for the air back into the oven. Becomes air introduced from the environment into the oven, it acts the passage mentioned is again a hot air inlet to the oven.
  • the air passage mentioned is provided on the back of the oven and preferably formed as an air inlet for air from the oven, wherein further preferably the passage openings have a circular shape Define air outlet area.
  • the air passage is again circular and is divided by several, each by arcuate slits formed defined sectors, wherein at least two film heating elements connected in parallel provided on intermediate bridges in at least one sector are.
  • the film heating element provided according to the invention can at the air outlet transversely and / or in the air inlet direction be arranged.
  • Carrier sections are preferably made of glass, glass ceramic, ceramic or enamelled metal, preferably made of glass ceramic or enamelled metal to use as heat radiation elements to work with the highest possible heat conduction.
  • the film heating element is preferably a Thin or thick film heating element, preferably around a thick film element.
  • the film heating element provided on a removable carrier, preferably with electrical plug contacts.
  • the air outlet as an air inlet formed from the oven and operatively connected to a blower, which distributes the air drawn in through the air inlet leads back into the oven.
  • the film heating element according to the invention When used on an air outlet where, as from the oven, steam and vapor contaminated air it is further, because of the small space requirement, possible, the film heating element according to the invention in the flow shadow to arrange the air mentioned and thereby his Minimize pollution, which is reinforced by catalysis becomes.
  • a first embodiment of the invention is shown schematically.
  • a blower 3 is arranged on the rear wall of an oven 1.
  • an air inlet 5 formed by a plurality of inlet openings 7 with intermediate webs 9, the schematically illustrated film heating element arrangement 11 is applied, preferably in the flow shadow of the sucked-in air L e .
  • the blower 3 blows the air heated in the air inlet area by means of the film heating element 11 from the oven 1 back into the oven, via air outlets 13, optionally with baffle arrangements 15 resulting in a desired air flow distribution.
  • FIG. 2 shows schematically and enlarged an air passage 5a with openings 7a and intermediate webs 9a, in which the film of the heating element 11a provided according to the invention with a film plane E in the flow direction corresponding to L e of the air flow.
  • FIGS. 1 (11) and 2 (11a) As shown in broken lines at 11 in FIG. 2, it is straightforward possible, the embodiments according to FIGS. 1 (11) and 2 (11a) to combine, from which it can be seen that with the inventive proposed film heating element an optimal Possibility is created, available volumes anyway optimal use for heating the air.
  • FIG. 3 starting from a representation according to FIG. 1, another Embodiment shown, in which, as is readily apparent, the flowing air in the area of the air outlets 13 is heated according to the invention with the film heating element 11b, and it can be seen that the embodiments according to FIG. 1 and FIG. 3 may be combined with FIG. 2 or as desired can be combined.
  • FIG. 4 shows an embodiment variant which is preferably used today of the oven according to the invention.
  • the blower 3 is mounted on the rear wall of the oven tube muffle 1 ', 5, is an air inlet plate 5b arranged.
  • At the air inlet plate 5b is a circular one Air inlet 15 incorporated, defined by arcuate Slots 7b, which define several opening sectors I, II, etc.
  • arcuate Slots 7b which define several opening sectors I, II, etc.
  • the film heating element according to the invention 11c On the webs lying between the arcuate slots 7b 9b runs, meandering, the film heating element according to the invention 11c, along two of those through the arcuate slots 7b defined circle sectors as shown along the Sectors II and III.
  • Heating element 11c also only along one of the sectors can be provided, and that per sector or at least for a certain proportion of the envisaged sectors a heating element 11c is provided. These are connected in parallel.
  • the film heating element 11c shows electrical connections 17 on the plate 5b, preferably plug connections.
  • the heating element 11c according to the invention is preferably not, as shown in Fig. 5 for reasons of clarity, on the provided the side of the passage opening facing the baking chamber, but, as shown schematically in Fig. 1, on the Back.
  • the carrier at least in the present case the flat surface 19 of the plate 5b, made of a good thermal conductor and electrically insulating material, so made of ceramic, Glass, glass ceramic or enamelled metal, preferably made of Glass ceramic or enameled metal.
  • a good thermal conductor and electrically insulating material so made of ceramic, Glass, glass ceramic or enamelled metal, preferably made of Glass ceramic or enameled metal.
  • the inventive Film heating element is as thin film or, and preferably, as Thick film heating element formed.
  • blowers 3 as dashed lines in Fig. 4 entered at 3a, also outside of the oven 1 defining muffle. Even with this version become film heating elements at the air outlet from the oven and / or provided at the air inlet in the oven.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Description

Die vorliegende Erfindung betrifft ein Backrohr mit einem Lufteinlass nach dem Oberbegriff von Anspruch 1.The present invention relates to an oven with an air inlet according to the preamble of claim 1.

Es ist bekannt, in Backrohren Heissluft insbesondere dadurch zu erzeugen, dass Luft aus dem Innern des Backrohres mittels eines Gebläses angesaugt, entlang von Rohrheizkörpern streichengelassen wird, welche die Luft erhitzen, und dann verteilt zurück ins Backrohr ausgeblasen wird. So ist aus der EP A 319 373 ein Backrohr mit einem Luftdurchlass und einer Heizelementanordnung für die am Luftdurchlass durchgelassene Luft bekannt, bei welchem im Bereich des Luftdurchlasses mindestens ein Heizelement angeordnet ist.It is known to cause hot air in baking tubes in particular generate air from inside the oven by means of a Fan sucked in, painted along tubular heating elements which will heat the air, and then spread back is blown into the oven. So is from EP A 319 373 Oven with an air outlet and a heating element arrangement known for the air let through at the air outlet, at which at least one heating element in the area of the air outlet is arranged.

Es ist Aufgabe der vorliegenden Erfindung, ein derartiges Backrohr vorzuschlagen, bei dem die Heizelementanordnung platzsparender ist - womit sich eine Nutzraumerhöhung des Backofens ergibt -, kleinere zu erhitzende Massen aufweist, feuchtigkeitsunempfindlich ist, eine kompaktere Bauweise erlaubt und mithin, auch unter Wirkungsgrad-Betrachtungen, wirtschaftlicher einsetzbar ist.It is an object of the present invention, such an oven to propose, in which the heating element arrangement saves space is - which results in an increase in the usable space of the oven - Has smaller masses to be heated, insensitive to moisture a more compact design is allowed and therefore can also be used more economically under efficiency considerations is.

Dies wird am Backrohr eingangs genannter Art dadurch erreicht, dass im Bereich des Luftdurchlasses eine Mehrzahl voneinander mittels Zwischenstegen getrennter Durchlassöffnungen gebildet sind, und mindestens an einem Teil der Zwischenstege mindestens ein Film-Heizelement vorgesehen ist.This is achieved on the oven of the type mentioned at the beginning by that in the area of the air passage a plurality of each other separate passage openings are formed by means of intermediate webs are, and at least on part of the intermediate webs a film heating element is provided.

Dabei kann es sich beim Luftdurchlass um die oben erwähnte Ansaugöffnung für Luft aus dem Backrohr handeln, ober aber um Auslassöffnungen für die Luft zurück ins Backrohr. Wird Luft aus der Umgebung erhitzt ins Backrohr eingeführt, handelt es sich beim erwähnten Durchlass wiederum um einen Heisslufteinlass zum Backrohr. The air outlet may be the above-mentioned suction opening act for air from the oven, but above Outlet openings for the air back into the oven. Becomes air introduced from the environment into the oven, it acts the passage mentioned is again a hot air inlet to the oven.

In einer bevorzugten Ausführungsform ist der erwähnte Luftdurchlass an der Backrohrrückseite vorgesehen und vorzugsweise als Lufteinlass für Luft aus dem Backrohr ausgebildet, wobei weiter bevorzugterweise die Durchlassöffnungen einen kreisförmigen Luftdurchlass-Bereich definieren.In a preferred embodiment, the air passage mentioned is provided on the back of the oven and preferably formed as an air inlet for air from the oven, wherein further preferably the passage openings have a circular shape Define air outlet area.

In einer weiteren bevorzugten Ausführungsform ist der Luftdurchlass wiederum kreisförmig und wird durch mehrere, je durch kreisbogenförmige Schlitze definierte Sektoren gebildet, wobei mindestens zwei elektrisch parallel geschaltete Filmheizelemente je auf Zwischenstegen an mindestens einem Sektor vorgesehen sind. Im weiteren kann das erfindungsgemäss vorgesehene Film-Heizelement am Luftdurchlass quer und/oder in Lufteinlassrichtung angeordnet sein.In a further preferred embodiment, the air passage is again circular and is divided by several, each by arcuate slits formed defined sectors, wherein at least two film heating elements connected in parallel provided on intermediate bridges in at least one sector are. Furthermore, the film heating element provided according to the invention can at the air outlet transversely and / or in the air inlet direction be arranged.

Trägerpartien, erfindungsgemäss mit dem Film-Heizelement versehen, sind vorzugsweise aus Glas, Glaskeramik, Keramik oder emailliertem Metall ausgebildet, vorzugsweise aus Glaskeramik oder emailliertem Metall, um selber als Wärmestrahlungselemente mit möglichst hoher Wärmeleitung zu wirken.Carrier sections, provided according to the invention with the film heating element, are preferably made of glass, glass ceramic, ceramic or enamelled metal, preferably made of glass ceramic or enamelled metal to use as heat radiation elements to work with the highest possible heat conduction.

Bevorzugterweise handelt es sich beim Film-Heizelement um ein Dünn- oder Dickfilmheizelement, bevorzugterweise um ein Dickfilmelement.The film heating element is preferably a Thin or thick film heating element, preferably around a thick film element.

In einer weiteren bevorzugten Ausführungsform ist das Film-Heizelement an einem entfernbaren Träger vorgesehen, vorzugsweise mit elektrischen Steckkontakten. In einer weiteren bevorzugten Ausführungsform ist der Luftdurchlass als Lufteinlass aus dem Backrohr ausgebildet und mit einem Gebläse wirkverbunden, welches die durch den Lufteinlass angesaugte Luft verteilt ins Backrohr rückführt. In a further preferred embodiment, the film heating element provided on a removable carrier, preferably with electrical plug contacts. In another preferred The embodiment is the air outlet as an air inlet formed from the oven and operatively connected to a blower, which distributes the air drawn in through the air inlet leads back into the oven.

Durch Realisation der Heizelementanordnung als Film-Heizelement ergeben sich, mit dem Vorsehen von Rohrheizkörpern verglichen, für diese Anordnung wesentlich weniger Konstruktionsteile, insbesondere auch deshalb, weil Partien eines ohnehin vorgesehenen Luftdurchlasses als Film-Heizelement-Träger eingesetzt werden können. Durch Einsatz des Film-Heizelementes ergibt sich weiter ein wesentlich reduziertes Bauvolumen der Heizelementanordnung, und die massgeblich geringeren aufzuheizenden Massen ergeben eine Wirkungsgradsteigerung. In bevorzugter Ausführungsform in Dünnfilm- bzw. insbesondere Dickfilmtechnik sind die erfindungsgemäss eingesetzten Heizelemente kaum feuchtigkeitsempfindlich. Bei Einsatz an einem Luftdurchlass, bei dem, wie aus dem Backrohr, dampf- und wrasenkontaminierte Luft vorbeistreicht, ist es weiter, aus Gründen des geringen Platzbedarfes, möglich, das erfindungsgemässe Film-Heizelement im Strömungsschatten der erwähnten Luft anzuordnen und dadurch seine Verschmutzung zu minimalisieren, was durch Katalyse noch verstärkt wird.By realizing the heating element arrangement as a film heating element compared to the provision of tubular heaters, for this arrangement significantly fewer construction parts, in particular also because lots of an already planned one Air passages can be used as a film heating element carrier can. By using the film heating element further results a significantly reduced construction volume of the heating element arrangement, and result in the significantly lower masses to be heated an increase in efficiency. In a preferred embodiment in Thin-film or, in particular, thick-film technology are those according to the invention heating elements hardly sensitive to moisture. When used on an air outlet where, as from the oven, steam and vapor contaminated air it is further, because of the small space requirement, possible, the film heating element according to the invention in the flow shadow to arrange the air mentioned and thereby his Minimize pollution, which is reinforced by catalysis becomes.

Die Erfindung wird anschliessend beispielsweise anhand von Figuren erläutert. Dabei zeigt:

Fig. 1
schematisch eine erste Ausführungsvariante eines erfindungsgemässen Backrohres;
Fig. 2
an einem beispielsweise gemäss Fig. 1 vorgesehenen Luftdurchlass, zwei weitere Ausführungsvarianten des Heizelementes, in unterschiedlicher Ausrichtung bezüglich Luftströmungsrichtung;
Fig. 3
ausgehend von einer Darstellung gemäss Fig. 1, die erfindungsgemässe Heizelementanordnung Luftauslass-seitig;
Fig. 4
vereinfacht, im Querschnitt, eine heute bevorzugte Ausführungsvariante des erfindungsgemässen Backrohres, und
Fig. 5
die Aufsicht auf den Lufteinlass an der Anordnung gemäss Fig. 4.
The invention is subsequently explained, for example, using figures. It shows:
Fig. 1
schematically a first embodiment of an oven according to the invention;
Fig. 2
on an air passage provided for example in accordance with FIG. 1, two further design variants of the heating element, in different orientations with respect to the direction of air flow;
Fig. 3
starting from a representation according to FIG. 1, the heating element arrangement according to the invention on the air outlet side;
Fig. 4
simplified, in cross section, a preferred embodiment variant of the oven according to the invention, and
Fig. 5
the supervision of the air inlet on the arrangement according to FIG. 4.

In Fig. 1 ist schematisch eine erste Ausführungsform der Erfindung dargestellt. Beispielsweise an der Rückwand eines Backrohres 1 ist ein Gebläse 3 angeordnet. Durch einen Lufteinlass 5, gebildet durch eine Mehrzahl von Einlassöffnungen 7 mit Zwischenstegen 9, ist, vorzugsweise im Strömungsschatten der eingesaugten Luft Le, die schematisch dargestellte Film-Heizelement-Anordnung 11 aufgebracht. Das Gebläse 3 bläst die im Lufteinlass-Bereich mittels des Film-Heizelementes 11 erwärmte Luft aus dem Backrohr 1 wieder zurück ins Backrohr, über Luftauslässe 13, gegebenenfalls mit eine erwünschte Luftströmungs-Verteilung ergebenden Leitblechanordnungen 15.In Fig. 1, a first embodiment of the invention is shown schematically. For example, a blower 3 is arranged on the rear wall of an oven 1. Through an air inlet 5, formed by a plurality of inlet openings 7 with intermediate webs 9, the schematically illustrated film heating element arrangement 11 is applied, preferably in the flow shadow of the sucked-in air L e . The blower 3 blows the air heated in the air inlet area by means of the film heating element 11 from the oven 1 back into the oven, via air outlets 13, optionally with baffle arrangements 15 resulting in a desired air flow distribution.

Während gemäss Fig. 1 die Ebene E des Heizelementenfilmes quer zur Luftströmungsrichtung entsprechend Le steht, zeigt Fig. 2 schematisch und vergrössert einen Luftdurchlass 5a mit Öffnungen 7a und Zwischenstegen 9a, bei der der Film des erfindungsgemäss vorgesehenen Heizelementes 11a mit einer Filmebene E in Strömungsrichtung entsprechend Le der Luftströmung steht.1, the plane E of the heating element film is perpendicular to the air flow direction according to L e , FIG. 2 shows schematically and enlarged an air passage 5a with openings 7a and intermediate webs 9a, in which the film of the heating element 11a provided according to the invention with a film plane E in the flow direction corresponding to L e of the air flow.

Wie in Fig. 2 gestrichelt bei 11 eingetragen, ist es ohne weiteres möglich, die Ausführungsformen gemäss Fig. 1 (11) und 2 (11a) zu kombinieren, woraus ersichtlich wird, dass mit dem erfindungsgemäss vorgeschlagenen Film-Heizelement eine optimale Möglichkeit geschaffen ist, ohnehin zur Verfügung stehende Volumina für die Beheizung der Luft optimal auszunützen. As shown in broken lines at 11 in FIG. 2, it is straightforward possible, the embodiments according to FIGS. 1 (11) and 2 (11a) to combine, from which it can be seen that with the inventive proposed film heating element an optimal Possibility is created, available volumes anyway optimal use for heating the air.

Die Einsatzflexibilität geht aber weiter. So ist in Fig. 3, ausgehend von einer Darstellung gemäss Fig. 1, eine weitere Ausführungsform dargestellt, bei der, wie ohne weiteres ersichtlich, die strömende Luft im Bereich der Luftauslässe 13 erfindungsgemäss mit dem Filmheizelement 11b erhitzt wird, und es ist ersichtlich, dass die Ausführungsformen gemäss Fig. 1 und Fig. 3 gegebenenfalls mit Fig. 2 kombiniert werden bzw. beliebig kombinierbar sind.The flexibility of use continues. So in Fig. 3, starting from a representation according to FIG. 1, another Embodiment shown, in which, as is readily apparent, the flowing air in the area of the air outlets 13 is heated according to the invention with the film heating element 11b, and it can be seen that the embodiments according to FIG. 1 and FIG. 3 may be combined with FIG. 2 or as desired can be combined.

In Fig. 4 ist eine heute bevorzugt eingesetzte Ausführungsvariante des erfindungsgemässen Backrohres dargestellt. An der Rückwand der Backrohrmuffel 1' ist das Gebläse 3 montiert, darüber, wie sich aus Fig. 5 ergibt, ist eine Lufteinlassplatte 5b angeordnet. An der Lufteinlassplatte 5b ist ein kreisförmiger Lufteinlass 15 eingearbeitet, definiert durch bogenförmige Schlitze 7b, die mehrere Öffnungssektoren I, II etc. festlegen. Auf den zwischen den bogenförmigen Schlitzen 7b liegenden Stegen 9b läuft, mäanderförmig, das erfindungsgemässe Film-Heizelement 11c, entlang zweier der durch die bogenförmigen Schlitze 7b definierten Kreissektoren, wie dargestellt entlang den Sektoren II und III. Es versteht sich von selbst, dass das Heizelement 11c auch jeweils nur entlang einem der Sektoren vorgesehen werden kann, und dass damit pro Sektor oder mindestens für einen gewissen Anteil der vorgesehenen Sektoren je ein Heizelement 11c vorgesehen ist. Diese werden parallelgeschaltet. Das Film-Heizelement 11c weist, wie wiederum aus Fig. 4 ersichtlich, elektrische Anschlüsse 17 an der Platte 5b auf, vorzugsweise Steckanschlüsse.4 shows an embodiment variant which is preferably used today of the oven according to the invention. At the The blower 3 is mounted on the rear wall of the oven tube muffle 1 ', 5, is an air inlet plate 5b arranged. At the air inlet plate 5b is a circular one Air inlet 15 incorporated, defined by arcuate Slots 7b, which define several opening sectors I, II, etc. On the webs lying between the arcuate slots 7b 9b runs, meandering, the film heating element according to the invention 11c, along two of those through the arcuate slots 7b defined circle sectors as shown along the Sectors II and III. It goes without saying that that Heating element 11c also only along one of the sectors can be provided, and that per sector or at least for a certain proportion of the envisaged sectors a heating element 11c is provided. These are connected in parallel. The film heating element 11c, as again from FIG. 4 shows electrical connections 17 on the plate 5b, preferably plug connections.

Bevorzugterweise wird das erfindungsgemässe Heizelement 11c nicht, wie in Fig. 5 aus Übersichtsgründen dargestellt, auf der dem Backraum zugewandten Seite der Durchlassöffnung vorgesehen, sondern, wie in Fig. 1 schematisch dargestellt, auf dessen Rückseite.The heating element 11c according to the invention is preferably not, as shown in Fig. 5 for reasons of clarity, on the provided the side of the passage opening facing the baking chamber, but, as shown schematically in Fig. 1, on the Back.

Im weiteren wird der Träger, also vorliegendenfalls mindestens die Planfläche 19 der Platte 5b, aus einem gut wärmeleitenden und elektrisch isolierenden Material gefertigt, so aus Keramik, Glas, Glaskeramik oder emailliertem Metall, vorzugsweise aus Glaskeramik oder emailliertem Metall. Dasselbe gilt selbstverständlich für die schematisch anhand der Figuren 1 bis 3 erläuterten Ausführungsvarianten. Um den Träger mit dem Film-Heizelement ohne weiteres demontieren und ersetzen zu können, werden bevorzugt Steckverbindungen unmittelbar am Träger für das erwähnte Heizelement vorgesehen. Das erfindungsgemässe Filmheizelement ist als Dünnfilm- oder, und bevorzugt, als Dickfilm-Heizelement ausgebildet.Furthermore, the carrier, at least in the present case the flat surface 19 of the plate 5b, made of a good thermal conductor and electrically insulating material, so made of ceramic, Glass, glass ceramic or enamelled metal, preferably made of Glass ceramic or enameled metal. The same applies of course for the schematically explained with reference to Figures 1 to 3 Versions. To the carrier with the film heating element easy to dismantle and replace, are preferred connectors directly on the carrier for the heating element mentioned provided. The inventive Film heating element is as thin film or, and preferably, as Thick film heating element formed.

Bei der Ausführungsform gemäss den Figuren 4, 5 ist es selbstverständlich auch möglich, in Analogie zu Fig. 3 Film-Heizelemente (nicht dargestellt) im Bereich von Austrittsschlitzen 13a vorzusehen, zusätzlich oder anstatt derjenigen am Lufteinlass, 11c.In the embodiment according to FIGS. 4, 5, it goes without saying also possible in analogy to Fig. 3 film heating elements (not shown) in the area of outlet slots 13a, in addition to or instead of that on Air intake, 11c.

Weiter kann die Anordnung von Gebläse 3, wie in Fig. 4 gestrichelt bei 3a eingetragen, auch ausserhalb der das Backrohr 1 definierenden Muffel angeordnet sein. Auch bei dieser Ausführung werden Film-Heizelemente am Luftauslass aus dem Backrohr und/oder am Lufteinlass ins Backrohr vorgesehen.Furthermore, the arrangement of blowers 3, as dashed lines in Fig. 4 entered at 3a, also outside of the oven 1 defining muffle. Even with this version become film heating elements at the air outlet from the oven and / or provided at the air inlet in the oven.

Claims (8)

  1. Cooking chamber with an air passage (5, 13) and a heating element arrangement for the air passing at the air passage, whereby in the area of the air passage at least one heating element is arranged, characterized in that the air passage has a plurality of passage openings (7, 7b) separated by interpartition walls (9, 9b) and having arranged heating elements in form of film heating elements (11, 11a, 11b, 11c) at least at a part of the interpartition walls (9, 9b).
  2. Cooking chamber according to claim 1, characterized in that the air passage is provided backside of the cooking chamber and defining preferably an air inlet (15) and further preferably passage openings (7b) defining a circular air passage area.
  3. Cooking chamber according claim 1 or 2, characterized in that the air passage is circular and built by a number of sectors (I, II, III) defined by circular arc formed slots (7b), whereby at least two electrically parallel connected film heating elements (11c) are provided each on interpartition walls (9b) of at least one sector (I, II, III).
  4. Cooking chamber according to one of claims 1 to 3, characterized in that the film heating element (11, 11c) is arranged across to and/or within the the air passage direction (Le).
  5. Cooking chamber according to one of claims 1 to 4, characterized in that at least supporting parts with the film heating elements (11, 11a, 11b, 11c) are made of glass, glass ceramics, ceramics or enameled metal, preferably out of glass ceramics and/or enameled metal.
  6. Cooking chamber according to one of claims 1 to 5, characterized in that the film heating element is a thin or thick film heating element, preferably a thick film heating element.
  7. Cooking chamber according to one of claims 1 to 6, characterized in that the film heating element is arranged on a support (5b) detachable from the cooking chamber, preferably with an electrical plug-type connection.
  8. Cooking chamber according to one of claims 1 to 7, characterized in that the air passage is functionally connected with a blower (3), which is intaking air form the cooking chamber and refeeding it, preferably distributed, into the cooking chamber.
EP19980105610 1998-03-27 1998-03-27 Cooking chamber with an air inlet and a heating element arrangement Expired - Lifetime EP0852317B1 (en)

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Application Number Priority Date Filing Date Title
EP19980105610 EP0852317B1 (en) 1998-03-27 1998-03-27 Cooking chamber with an air inlet and a heating element arrangement
DE59809986T DE59809986D1 (en) 1998-03-27 1998-03-27 Oven with an air inlet and a heating element arrangement

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Application Number Priority Date Filing Date Title
EP19980105610 EP0852317B1 (en) 1998-03-27 1998-03-27 Cooking chamber with an air inlet and a heating element arrangement

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EP0852317A1 EP0852317A1 (en) 1998-07-08
EP0852317B1 true EP0852317B1 (en) 2003-10-29

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US11751295B2 (en) 2021-02-19 2023-09-05 Whirlpool Corporation Convection system for an oven

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