EP0580940B1 - Baking oven - Google Patents

Baking oven Download PDF

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Publication number
EP0580940B1
EP0580940B1 EP93102991A EP93102991A EP0580940B1 EP 0580940 B1 EP0580940 B1 EP 0580940B1 EP 93102991 A EP93102991 A EP 93102991A EP 93102991 A EP93102991 A EP 93102991A EP 0580940 B1 EP0580940 B1 EP 0580940B1
Authority
EP
European Patent Office
Prior art keywords
cooking space
baking oven
wall
discharge slots
dish
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
Application number
EP93102991A
Other languages
German (de)
French (fr)
Other versions
EP0580940A3 (en
EP0580940A2 (en
Inventor
Martin Dipl.-Ing. Schulte
Wolfgang Dipl.-Ing. Beifuss
Rainer Dipl.-Ing. Haberlander (Fh)
Johann Klement
Karl Dipl.-Ing. Nitzinger (Fh)
Josef Gerl
Klaus Dipl.-Ing. Thomas (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0580940A2 publication Critical patent/EP0580940A2/en
Publication of EP0580940A3 publication Critical patent/EP0580940A3/en
Application granted granted Critical
Publication of EP0580940B1 publication Critical patent/EP0580940B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 invention relates to an oven according to the Preamble of claim 1.
  • the invention is based on the object in one Oven mentioned in the preamble of claim 1 kind of the flow of those blown out through the exhaust slots Air in relation to that in the cooking space, especially in the middle area of the Cooking food located without additional, complex To improve air control elements.
  • the design should suitable for cooking using microwave energy be.
  • blow-out slots Because of the configuration of the blow-out slots according to the invention you can easily by appropriate dimensioning and number of webs and Slit sections to influence the flow conditions at the opposite exhaust slots in Dependence on the direction of rotation of the air circulation fan. Especially can be an equalization of the Air flow and an improvement in air flow esp. preserved in the middle of the oven. There is no need there are additional air baffles or the like inside the blower chamber. In addition, if there is one Microwave generator due to the special design the blowout slots a microwave tightness of the blower chamber reached, the successive, by webs slot sections separated from one another may be relatively large can, if the blow-out slots on the adjacent cooking space walls are facing, i.e. in the side area of the Cover wall.
  • the invention is based on one shown in the drawing Embodiment explained below.
  • a cooking space 1 is limited by a cuboid muffle 2, which is shown by a not-shown Oven door is lockable.
  • a radiant heater in the upper cooking chamber wall 3 4.
  • a Lower heat of the oven forming heater 6 arranged.
  • Supports 9 attached, on which e.g. two rust or pan-like Food support 10 or baking trays with support frame can be stored.
  • a trough-like cover wall 12 which partially limits the cooking space 1 towards the rear and between the rear wall of the cooking space and this cover wall 12 forms a blower chamber 13.
  • the cover wall 12 is made from a substantially flat trough base 14, from in lateral and planar essentially bent at right angles Tub edges e.g. 15 and 16 (Fig. 2, 3) and from Tub flanges e.g. 17, 18 that are related and parallel run to the tub floor 14 and flat or flush rest against the rear wall of the cooking space 11.
  • Fig. 1 covers the cover 12 substantially the Entire rear cooking space wall 11.
  • a round suction opening 19 for the circulating air is formed 2 and 3 by a round perforated surface.
  • the fan wheel 20 of a not shown Air circulation fan Behind this suction opening 19 inside the blower chamber 13 is the fan wheel 20 of a not shown Air circulation fan, the direction of rotation of which is determined by a Arrow is clear.
  • Blow-out slots 21, 22, which are a function of the direction of rotation of the fan wheel 20 in different Height are arranged such that the blowout slot 21st due to the downward flow of partial air lies as the blowout slot 22 for the upward Air control component (Fig. 1).
  • the blowout slots 21 and 22 are made up successive slot sections 21a and 22a, respectively are separated from one another by narrow webs 21b and 22b.
  • the webs of the metallic cover wall 12 are included the opposite slot longitudinal edges of the blow-out slots 21, 22 metallically connected and act in the microwave case as shorting bars that exit a microwave Prevent from the furnace chamber 1 into the blower chamber 13.
  • These blow-out slots 21, 22 are adjacent to the side cooking chamber walls 7 and 8 opposite, so that the essentially laminar emerging from the exhaust slots Air flow directly onto these side cooking space walls strikes and reflected there into the interior of the cooking space 1 and is swirled, as by flow arrows in Fig. 1 illustrates.
  • the arrangement of the radiators and the baking trays etc. can the exhaust slots 21, 22 or the number and size of the slot sections and the webs can be varied.
  • blowout slots on others Provide the cover wall or in addition to the in Embodiment shown exhaust slots further exhaust slots to be provided, e.g. a flow towards of the upper radiator or a temperature sensor.

Description

Die Erfindung bezieht sich auf einen Backofen gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to an oven according to the Preamble of claim 1.

Bei einem bekannten Umluftofen dieser Art (DE-AS 25 57 867) ist ein Lüfterrad eines Umluftgebläses in einer durch eine Abdeckwand einerseits und durch die Rückwand des Garraumes andererseits gebildeten Gebläsekammer angeordnet und beidseitig der Abdeckwand in Nähe der Seitenwände des Garraumes befinden sich langgestreckte, vertikale Ausblasschlitze, denen unmittelbar benachbart wesentlich schmälere, weitere Ausblasschlitze zugeordnet sind. Um eine Turbulenz der ausgeblasenen Luftströmung zu bewirken sind an den erstgenannten Ausblasschlitzen als auch an besonderen Luftleitelementen im Inneren der Gebläsekammer in den Strömungsweg ragende Kanten bzw. Abbiegungen vorgesehen. Durch die zweitgenannten schmalen Schlitze wird die Turbulenz der ausströmenden Luft noch vergrößert.In a known convection oven of this type (DE-AS 25 57 867) is a fan wheel of a fan in a through Cover wall on the one hand and through the rear wall of the cooking space on the other hand formed blower chamber arranged and on both sides the cover wall near the side walls of the cooking space there are elongated, vertical exhaust slots, those immediately adjacent to it are much narrower, others Blow out slots are assigned. To turbulence the blown out Air flow is to be effected on the former Blow out slots as well as on special air guiding elements inside the blower chamber protruding into the flow path Edges or bends provided. By the second The slits become the turbulence of the outflowing air still enlarged.

Der Erfindung liegt nun die Aufgabe zugrunde, bei einem Backofen der im Oberbegriff des Patentanspruches 1 genannten Art die Strömung der durch die Ausblasschlitze ausgeblasenen Luft in bezug auf das im Garraum, insb. im Mittelbereich des Garraumes befindliche Gargut ohne zusätzliche, aufwendige Luftleitelemente zu verbessern. Daneben soll die Ausgestaltung für die Garung mittels Mikrowellenenergie geeignet sein.The invention is based on the object in one Oven mentioned in the preamble of claim 1 Kind of the flow of those blown out through the exhaust slots Air in relation to that in the cooking space, especially in the middle area of the Cooking food located without additional, complex To improve air control elements. In addition, the design should suitable for cooking using microwave energy be.

Diese Aufgabe wird erfindungsgemäß gelöst durch die im Kennzeichnungsteil des Patentanspruches 1 aufgeführten Maßnahmen. Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Patentansprüchen.This object is achieved by the im Labeling part of claim 1 measures listed. Further developments of the invention result from the subsequent claims.

Aufgrund der erfindungsgemäßen Ausgestaltung der Ausblasschlitze erhält man auf einfache Weise die Möglichkeit, durch entsprechende Bemessung und Anzahl der Stege und Schlitzabschnitte Einfluß zu nehmen auf die Strömungsverhältnisse an den gegenüberliegenden Ausblasschlitzen in Abhängigkeit von der Drehrichtung des Umluftgebläses. Insbesondere kann man auf diese Weise eine Vergleichmäßigung der Luftströmung und eine Verbesserung der Luftströmung insb. im mittleren Bereich des Backofens erhalten. Dabei erübrigen sich zusätzliche Luftleitbleche oder dergleichen im Inneren der Gebläsekammer. Darüber hinaus wird bei Vorhandensein eines Mikrowellengenerators durch die besondere Ausgestaltung der Ausblasschlitze eine Mikrowellendichtheit der Gebläsekammer erreicht, wobei die aufeinanderfolgenden, durch Stege voneinander getrennte Schlitzabschnitte relativ groß sein können, wenn die Ausblasschlitze den angrenzenden Garraumwänden zugewandt sind, d.h. sich im seitlichen Bereich der Abdeckwand befinden.Because of the configuration of the blow-out slots according to the invention you can easily by appropriate dimensioning and number of webs and Slit sections to influence the flow conditions at the opposite exhaust slots in Dependence on the direction of rotation of the air circulation fan. Especially can be an equalization of the Air flow and an improvement in air flow esp. preserved in the middle of the oven. There is no need there are additional air baffles or the like inside the blower chamber. In addition, if there is one Microwave generator due to the special design the blowout slots a microwave tightness of the blower chamber reached, the successive, by webs slot sections separated from one another may be relatively large can, if the blow-out slots on the adjacent cooking space walls are facing, i.e. in the side area of the Cover wall.

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispieles nachstehend erläutert.The invention is based on one shown in the drawing Embodiment explained below.

Es zeigt:

Fig. 1
eine schematische, perspektivische Darstellung des Backofens,
Fig. 2 und 3
zwei unterschiedliche, perspektivische Ansichten der Abdeckwand des Backofens gemäß Fig. 1.
It shows:
Fig. 1
1 shows a schematic, perspective illustration of the oven,
2 and 3
two different, perspective views of the cover wall of the oven according to FIG. 1.

Beim Ausführungsbeispiel wird ein Garraum 1 begrenzt durch eine quaderförmige Ofenmuffel 2, die durch eine nicht-dargestellte Ofentür verschließbar ist. Unmittelbar unterhalb der oberen Garraumwand 3 befindet sich ein Strahlungsheizkörper 4. Unterhalb der unteren Garraumwand 5 ist ein die Unterhitze des Backofens bildender Heizkörper 6 angeordnet. An den gegenüberliegenden Garraum-Seitenwänden 7 und 8 sind z.B. in zwei unterschiedlichen Höhenlagen rippenartige Stützen 9 befestigt, auf denen z.B. zwei rost- oder pfannenartige Gargutträger 10 bzw. Backbleche mit Tragrahmen gelagert sein können. Unmittelbar vor der hinteren Garraumwand 11 befindet sich eine wannenartige Abdeckwand 12, die zu einem Teil den Garraum 1 nach hinten hin begrenzt und zwischen der hinteren Garraumwand und dieser Abdeckwand 12 eine Gebläsekammer 13 bildet. Die Abdeckwand 12 besteht aus einem im wesentlichen ebenen Wannenboden 14, aus im wesentlichen rechtwinkelig abgebogenen seitlichen und flächigen Wannenrändern z.B. 15 und 16 (Fig. 2, 3) sowie aus Wannenflanschen z.B. 17, 18, die zusammenhängen und parallel zum Wannenboden 14 verlaufen und flächig bzw. bündig an der hinteren Garraumwand 11 anliegen. Wie aus Fig. 1 ersichtlich, überdeckt die Abdeckwand 12 im wesentlichen die gesamte hintere Garraumwand 11. Im Wannenboden 14, und zwar außermittig im oberen Bereich des Wannenboden 14, befindet sich eine runde Ansaugöffnung 19 für die Umluft, gebildet gemäß Fig. 2 und 3 durch eine runde perforierte Fläche. In the exemplary embodiment, a cooking space 1 is limited by a cuboid muffle 2, which is shown by a not-shown Oven door is lockable. Immediately below There is a radiant heater in the upper cooking chamber wall 3 4. Below the lower cooking chamber wall 5 is a Lower heat of the oven forming heater 6 arranged. There are 7 and 8 on the opposite cooking chamber side walls e.g. rib-like at two different altitudes Supports 9 attached, on which e.g. two rust or pan-like Food support 10 or baking trays with support frame can be stored. Immediately in front of the rear wall of the cooking space 11 there is a trough-like cover wall 12, which partially limits the cooking space 1 towards the rear and between the rear wall of the cooking space and this cover wall 12 forms a blower chamber 13. The cover wall 12 is made from a substantially flat trough base 14, from in lateral and planar essentially bent at right angles Tub edges e.g. 15 and 16 (Fig. 2, 3) and from Tub flanges e.g. 17, 18 that are related and parallel run to the tub floor 14 and flat or flush rest against the rear wall of the cooking space 11. As can be seen from Fig. 1 covers the cover 12 substantially the Entire rear cooking space wall 11. In the bottom of the pan 14 is located off-center in the upper region of the tub floor 14 a round suction opening 19 for the circulating air is formed 2 and 3 by a round perforated surface.

Hinter dieser Ansaugöffnung 19 im Inneren der Gebläsekammer 13 befindet sich das Lüfterrad 20 eines nicht weiter dargestellten Umluftgebläses, dessen Drehrichtung durch einen Pfeil verdeutlicht ist. In den vertikalen, gegenüberliegenden seitlichen Wannenrändern 15, 16 befinden sich langgestreckte Ausblasschlitze 21, 22, die in Abhängigkeit von der Drehrichtung des Lüfterrades 20 in unterschiedlicher Höhe angeordnet sind, derart, daß der Ausblasschlitz 21 infolge des nach unten gerichteten Teilluftstromes höher liegt als der Ausblasschlitz 22 für die nach oben gerichtete Luftsteuerungskomponente (Fig. 1). Wie insb. Fig. 2 und 3 zeigen, bestehen die Ausblasschlitze 21 und 22 aus aufeinanderfolgenden Schlitzabschnitten 21a bzw. 22a, die durch schmale Stege 21b bzw. 22b voneinander getrennt sind. Hierbei sind die Stege der metallischen Abdeckwand 12 mit den gegenüberliegenden Schlitz-Längskanten der Ausblasschlitze 21, 22 metallisch verbunden und wirken im Mikrowellenfalle als Kurzschlußstege, die einen Mikrowellenaustritt vom Ofenraum 1 her in die Gebläsekammer 13 verhindern. Diese Ausblasschlitze 21, 22 liegen den angrenzenden, seitlichen Garraumwänden 7 und 8 gegenüber, so daß die aus den Ausblasschlitzen austretende, im wesentlichen laminare Luftströmung unmittelbar auf diese seitlichen Garraumwände auftrifft und dort in das Innere des Garraumes 1 reflektiert und verwirbelt wird, wie durch Strömungspfeile in Fig. 1 verdeutlicht. In Abhängigkeit von der Beschaffenheit des Garraumes, der Anordnung der Heizkörper und der Backbleche usw. kann die Ausblasschlitze 21, 22 bzw. die Anzahl und Größe der Schlitzabschnitte und der Stege variiert werden. Selbstverständlich besteht im Rahmen der vorliegenden Erfindung auch die Möglichkeit, Ausblasschlitze an anderen Stellen der Abdeckwand vorzusehen bzw. zusätzlich zu den im Ausführungsbeispiel gezeigten Ausblasschlitzen weitere Ausblasschlitze vorzusehen, die z.B. eine Strömung in Richtung des oberen Heizkörpers oder eines Temperaturfühlers bewirken.Behind this suction opening 19 inside the blower chamber 13 is the fan wheel 20 of a not shown Air circulation fan, the direction of rotation of which is determined by a Arrow is clear. In the vertical, opposite lateral tub edges 15, 16 are elongated Blow-out slots 21, 22, which are a function of the direction of rotation of the fan wheel 20 in different Height are arranged such that the blowout slot 21st due to the downward flow of partial air lies as the blowout slot 22 for the upward Air control component (Fig. 1). As in particular Fig. 2 3 and 3, the blowout slots 21 and 22 are made up successive slot sections 21a and 22a, respectively are separated from one another by narrow webs 21b and 22b. Here, the webs of the metallic cover wall 12 are included the opposite slot longitudinal edges of the blow-out slots 21, 22 metallically connected and act in the microwave case as shorting bars that exit a microwave Prevent from the furnace chamber 1 into the blower chamber 13. These blow-out slots 21, 22 are adjacent to the side cooking chamber walls 7 and 8 opposite, so that the essentially laminar emerging from the exhaust slots Air flow directly onto these side cooking space walls strikes and reflected there into the interior of the cooking space 1 and is swirled, as by flow arrows in Fig. 1 illustrates. Depending on the nature the cooking space, the arrangement of the radiators and the baking trays etc. can the exhaust slots 21, 22 or the number and size of the slot sections and the webs can be varied. Of course there is within the scope of the present Invention also allows blowout slots on others Provide the cover wall or in addition to the in Embodiment shown exhaust slots further exhaust slots to be provided, e.g. a flow towards of the upper radiator or a temperature sensor.

Claims (6)

  1. Baking oven with an equipment for circulation of air, which is heated by heating elements, in the cooking space by means of a circulating air blower, which is arranged in a blower chamber, which blower chamber is formed by a cooking space wall and a dishshaped cover wall, which is placed on this cooking space wall and which bears by the dish flange flushly against the cooking space wall and has in front of the circulating air blower a central intake opening in the dish base as well as elongate discharge slots at at least two oppositely disposed lateral dish edges, characterised thereby that the discharge slots (21, 22) are subdivided by narrow webs (21b, 22b) into several slot portions (21a, 22a) following one another in slot longitudinal direction.
  2. Baking oven according to claim 1, characterised thereby that in dependence on the rotational direction of the circulating air blower (20) the entire opening area of the slot portions (21a, 22a) at opposite dish edges (15, 16) is different in size.
  3. Baking oven according to claim 2, characterised thereby that the discharge slots (21, 22) at opposite dish edges (15, 16) are equal in size and are subdivided by different numbers of webs (21b, 22b).
  4. Baking oven according to one of the preceding claims, characterised thereby that in dependence on the rotational direction of the circulating air blower (20) the discharge slots (21, 22) at opposite, vertical dish edges (15, 16) are arranged at different heights.
  5. Baking oven according to one of the preceding claims, characterised thereby that the cover wall (12) extends at least approximately over the entire, preferably rearward, wall (11) of the cooking space and the discharge slots (21, 22) are directed towards the adjoining walls (7, 8) of the cooking space.
  6. Baking oven according to one of the preceding claims, characterised thereby that the cooking space (1) is connected to a microwave generator and that the webs (21b, 22b) of the discharge slots (21, 22) or metallic over wall (12) serve as means preventing microwave exit from the cooking space (1), which metallically interconnect the opposite slot longitudinal edges.
EP93102991A 1992-07-27 1993-02-25 Baking oven Expired - Lifetime EP0580940B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4224797 1992-07-27
DE4224797A DE4224797C2 (en) 1992-07-27 1992-07-27 oven

Publications (3)

Publication Number Publication Date
EP0580940A2 EP0580940A2 (en) 1994-02-02
EP0580940A3 EP0580940A3 (en) 1995-01-18
EP0580940B1 true EP0580940B1 (en) 1998-02-04

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ID=6464224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102991A Expired - Lifetime EP0580940B1 (en) 1992-07-27 1993-02-25 Baking oven

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EP (1) EP0580940B1 (en)
DE (2) DE4224797C2 (en)
ES (1) ES2114573T3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1267036B1 (en) * 1993-01-27 1997-01-24 Fime Fab It Motor Elett GAS OVEN FOR VENTILATED TYPE KITCHENS, HIGH PERFORMANCE
DE19640237A1 (en) * 1996-09-30 1998-04-02 Bosch Siemens Hausgeraete Oven with fan
FR2847027B1 (en) * 2002-11-13 2006-04-21 Brandt Ind VENTILATED COOKING STACK, IN PARTICULAR FOR DOMESTIC COOKING OVENS
DE10313916A1 (en) * 2003-03-27 2004-10-07 BSH Bosch und Siemens Hausgeräte GmbH Oven with internal air recirculation fan includes air inlet openings associated with angled ducts which deflect airflows entering oven chamber
ITTO20080296A1 (en) * 2008-04-15 2009-10-16 Indesit Co Spa VENTILATED OVEN
EP3546832B1 (en) * 2018-03-27 2021-04-28 Steel S.r.l. Kitchen oven with hybrid power supply
KR102360135B1 (en) * 2019-08-08 2022-02-08 주식회사 케이티앤지 Aerosol generating system
US20230250970A1 (en) * 2022-02-10 2023-08-10 Whirlpool Corporation Baffle assembly for an oven to generate distinct air flow regions within a cooking chamber having a different temperature

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2079466A5 (en) * 1970-02-02 1971-11-12 Capic Caillarec Ets
DE2557867C3 (en) * 1975-12-22 1979-11-08 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Convection oven
DE2803910A1 (en) * 1977-02-11 1978-08-17 Philips Nv COOKING OVENS WITH FORCED HEATING GAS CIRCULATION IN THE MUFFLE AND WITH CATALYTIC FILTER ELEMENTS
AU8855482A (en) * 1981-10-02 1983-04-14 Gas & Fuel Corp. of Victoria Oven distributer unit
FR2562991B1 (en) * 1984-04-11 1986-06-06 Europ Equip Menager ELECTRIC ENERGY COOKING CABINET

Also Published As

Publication number Publication date
DE4224797C2 (en) 1994-09-01
DE4224797A1 (en) 1994-02-03
ES2114573T3 (en) 1998-06-01
EP0580940A3 (en) 1995-01-18
EP0580940A2 (en) 1994-02-02
DE59308088D1 (en) 1998-03-12

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