EP0926448B1 - Device for ventilation of baking stove with muffle - Google Patents

Device for ventilation of baking stove with muffle Download PDF

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Publication number
EP0926448B1
EP0926448B1 EP98122378A EP98122378A EP0926448B1 EP 0926448 B1 EP0926448 B1 EP 0926448B1 EP 98122378 A EP98122378 A EP 98122378A EP 98122378 A EP98122378 A EP 98122378A EP 0926448 B1 EP0926448 B1 EP 0926448B1
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EP
European Patent Office
Prior art keywords
flow
cooling air
fan
fan wheel
motor
Prior art date
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Revoked
Application number
EP98122378A
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German (de)
French (fr)
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EP0926448A3 (en
EP0926448A2 (en
Inventor
Martin Geier
Rudolf Tungl
Christian Unterrainer
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Ebm Papst Landshut GmbH
BSH Hausgeraete GmbH
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Motoren Ventilatoren Landshut GmbH
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Application filed by Motoren Ventilatoren Landshut GmbH filed Critical Motoren Ventilatoren Landshut GmbH
Publication of EP0926448A2 publication Critical patent/EP0926448A2/en
Publication of EP0926448A3 publication Critical patent/EP0926448A3/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
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • 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
    • F24C15/006—Arrangements for circulation of cooling air

Definitions

  • the invention relates to a device for venting a Oven with muffle, with fan means and at least an engine.
  • Cookers and ovens can be equipped with filters for the vapors his.
  • the filters are usually made of one Wire mesh or have catalysts, whereby there is always a not inconsiderable resistance. So that enough vapors can be extracted from the muffle, the fan must pass through small suction cross sections of the housing be throttled, which in turn increases Noise emission leads.
  • a fan is specially designed for the Housing cooling is used, which is usually used as a cross-flow fan is designed.
  • a second fan is as Radial fan designed for the fume extraction. Since both fans each have their own motor, the disadvantage of this system is a high space requirement and an increased construction effort.
  • the invention is therefore based on the object of a device to ventilate an oven where optimal cooling with simple and inexpensive construction as well as good ventilation of the baking muffle with a motor can be achieved.
  • the object is achieved by at least one Air duct for the extraction of cooling air and vapors, with at least a first flow connection for a vapor air flow from the baking muffle and at least one second Flow connection for the cooling air flow for the outside environment the baking muffle loosened, the motor both a first fan wheel for the cooling air flow, as well as a second Fan wheel for the vapor air flow drives.
  • the fan wheel for the cooling air flow is advantageous an axial fan wheel and the fan wheel for the vapor air flow a radial fan wheel.
  • the motor can be between the fan wheel for the cooling air flow and the fan wheel for the vapor air flow, whereby it lies in the cooling air flow, whereby an additional Cooling the motor is effected.
  • the respective fan wheels that they are in each case in the flow connection, in particular in the opening of the air duct to the outside of the baking muffle or arranged in the opening of the air duct to the baking muffle are.
  • the Air duct can also be formed in two parts and for the Vapors and the cooling air each have a separate duct, which then lead to a mixing area in which both Streams are mixed together so that the vapors do not remains in its pure form in the area.
  • a plate that also serves to hold the motor, so form that they together with prefabricated pages and Connecting walls form the channel.
  • Fig. 1 is a schematic representation of an oven 2 shown with a device for ventilation 1.
  • the Oven is provided with a baking muffle 3, at the Top of the device 1 is arranged.
  • the device for ventilation points for the joint extraction of cooling air and vapors an air duct 5 which is connected to its in the Drawing right end to front 18 of oven 2 flows out and on its left in the drawing to Baking muffle 3 directed a flow connection 6 for the Vapor air flow 7 and opposite a flow connection 8 for the cooling air flow 9 for the outside environment 10 the baking muffle 3.
  • baffles or channel arrangements for the cooling air flow on the outside of the baking muffle be provided.
  • the motor shaft In the illustrated embodiment is in the space between the two Fan wheels 11 arranged a motor 4, the motor shaft a common shaft 13 for the first fan wheel 11 and forms the second fan wheel 12.
  • the first fan wheel for the cooling air flow 9 is an axial fan wheel trained, whereas the second fan wheel for the vapor air flow 7 is a radial fan wheel.
  • the radial fan wheel 12 can be a simple wheel without a cover disk a) with backward curved, b) with radially ending or c) with forward curved blades, as a wheel with Cover plate (also all three variants a), b) and c)) or be designed as a drum rotor.
  • the engine is between the radial fan and the axial fan.
  • the motor outside the air duct e.g. above the flow connection 8 be provided for the cooling air flow, so that the radial fan and the axial fan essentially side by side are arranged.
  • the Vapor duct 15 has a plate 17 which forms the air duct separates from the vapor channel and as the basis for the attachment of the engine. Under the plate 17 is the volute arranged for the radial wheel. Channel 5 is and connecting walls 5 'to 5' '' and the plate 17 formed, this plate on the one hand and the walls on the other can be individually manufactured components.
  • FIG. 2 shows a further embodiment in dashed lines Representation shown.
  • the respective flows of cooling air and of the fumes are in separate channels 14 and 15 up to one Mixing area 16 out. Both streams are there again merged.
  • the mixing area 16 can also be outside the oven immediately at the outlet of the two channels lie.
  • the motor can also be arranged outside the duct, and the drive of the two fan wheels 11 and 12 common shaft 13 take place via a belt drive.
  • the fan wheels 11 and 12 run on separate shafts that each with a different speed from the common Motor driven by separate belt drives.

Description

Die Erfindung betrifft eine Vorrichtung zum Belüften eines Backofens mit Backmuffel, mit Lüftermitteln und mindestens einem Motor.The invention relates to a device for venting a Oven with muffle, with fan means and at least an engine.

Eingebaute Herde und Backöfen heizen sich während des Betriebs an der Außenseite auf und müssen daher gekühlt werden. Die Kühlung erfolgt in der Regel entweder durch geeignete zwangsfreie Luftstromführung oder durch eine Zwangsbelüftung, die mittels eines Ventilators durchgeführt wird. Auch der während des Betriebs des Backofens anfallende Wrasen muß aus der Backmuffel in das Freie gefördert werden.Built-in cookers and ovens heat up during operation on the outside and must therefore be cooled. The cooling is usually done either by suitable forced air flow or forced ventilation, which is carried out by means of a fan. Also the vapors generated during the operation of the oven must be conveyed out of the baking muffle into the open.

Aus der DE-OS 40 33 989 ist bekannt, an der Rückseite der Backmuffel einen Elektromotor anzubringen, dessen Motorwelle an beiden Enden soweit verlängert ist, daß sie einerseits in die Backmuffel und andererseits in den Freiraum zwischen Backmuffel und Backofenrückwand hinein ragt. An diesen beiden Enden sind jeweils ein Lüfterrad angeordnet, so daß der Motor das Lüfterrad für die Kühlluft an der Außenseite der Backmuffel, als auch das Lüfterrad im Inneren der Backmuffel, das im Durchmesser größer ist als der Kühlventilator, mit gleicher Drehzahl antreibt. Das Lüfterrad in der Backmuffel ist durch eine Prallwand vom Innenraum der Backmuffel getrennt. An der Vorderseite weist die Tür zur Backmuffel im Fußbereich Lufteinlaßschlitze und im oberen Bereich Luftauslaßschlitze auf. Ebenso sind an der Oberseite der Backmuffel Luftaustrittsschlitze für die Kühlluft vorgesehen.From DE-OS 40 33 989 is known on the back of the Baking muffle to attach an electric motor, its motor shaft is extended at both ends so that it is on the one hand in the baking muffle and on the other hand in the free space protrudes between the muffle and the back of the oven. On a fan wheel is arranged at each of these two ends, so the motor has the fan wheel for the cooling air on the outside the muffle, as well as the fan wheel inside the baking muffle, which is larger in diameter than the cooling fan, drives at the same speed. The fan wheel in the baking muffle is through a baffle from the interior the baking muffle separated. The door faces the front to the baking muffle in the foot area air inlet slots and in the upper Air outlet slots area. Likewise, at the Top of the baking muffle air outlet slots for the Cooling air provided.

Es sind weitere Systeme bekannt, die mit einem Ventilator das Gehäuse kühlen und mit dem Unterdruck, der im Ansaugbereich des Ventilators entsteht, den Wrasen aus der Muffel absaugen. Dies ist bei wirtschaftlichem Betrieb jedoch nur dann möglich, wenn der Widerstand zwischen Backmuffel und Gehäuseinnenraum gering ist, d.h., es müssen genügend große Öffnungen in der Backmuffel vorgesehen sein.There are other systems known with a fan cool the housing and with the negative pressure in the suction area of the fan arises, the vapors from the muffle aspirate. However, this is only with economical operation possible if the resistance between baking muffle and The interior of the housing is small, i.e. it must be large enough Openings in the baking muffle may be provided.

Herde und Backöfen können mit Filtern für den Wrasen ausgestattet sein. Die Filter sind üblicherweise aus einem Drahtgeflecht hergestellt oder weisen Katalysatoren auf, wobei stets ein nicht unerheblicher Widerstand entsteht. Damit genügend Wrasen aus der Muffel abgesaugt werden kann, muß der Ventilator durch kleine Ansaugquerschnitte des Gehäuses gedrosselt werden, was wiederum zu einer erhöhten Geräuschemission führt. Im Stand der Technik wurde dieses Problem, ähnlich wie in der DE-OS 40 33 989 mit zwei Ventilatoren gelöst. Dabei wird ein Ventilator speziell für die Gehäusekühlung eingesetzt, der in der Regel als Querstromventilator ausgelegt ist. Ein zweiter Ventilator ist als Radial-Ventilator ausgelegt, der für den Wrasenabzug sorgt. Da beide Ventilatoren jeweils einen eigenen Motor besitzen, ist der Nachteil dieses Systems ein hoher Platzbedarf und ein erhöhter Bauaufwand.Cookers and ovens can be equipped with filters for the vapors his. The filters are usually made of one Wire mesh or have catalysts, whereby there is always a not inconsiderable resistance. So that enough vapors can be extracted from the muffle, the fan must pass through small suction cross sections of the housing be throttled, which in turn increases Noise emission leads. In the prior art, this was Problem, similar to DE-OS 40 33 989 with two fans solved. A fan is specially designed for the Housing cooling is used, which is usually used as a cross-flow fan is designed. A second fan is as Radial fan designed for the fume extraction. Since both fans each have their own motor, the disadvantage of this system is a high space requirement and an increased construction effort.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zum Belüften eines Backofens zu schaffen, bei der bei einfachen und kostengünstigen Aufbau eine optimale Kühlung wie auch gute Entlüftung der Backmuffel mit einem Motor erzielt werden kann.The invention is therefore based on the object of a device to ventilate an oven where optimal cooling with simple and inexpensive construction as well as good ventilation of the baking muffle with a motor can be achieved.

Die Aufgabe wird erfindungsgemäß durch mindestens einen Luftkanal für den Abzug von Kühlluft und Wrasen, mit mindestens einer ersten Strömungsverbindung für einen Wrasen-Luftstrom aus der Backmuffel und mindestens einer zweiten Strömungsverbindung für den Kühlluftstrom für die Außenumgebung der Backmuffel gelöst, wobei der Motor sowohl ein erstes Lüfterrad für den Kühlluftstrom, als auch ein zweites Lüfterrad für den Wrasen-Luftstrom antreibt. Durch die genannten Merkmale wird eine kostengünstige und einfache kombinierte Gehäusekühlung mit Wrasenabzug bereitgestellt.The object is achieved by at least one Air duct for the extraction of cooling air and vapors, with at least a first flow connection for a vapor air flow from the baking muffle and at least one second Flow connection for the cooling air flow for the outside environment the baking muffle loosened, the motor both a first fan wheel for the cooling air flow, as well as a second Fan wheel for the vapor air flow drives. Through the Features mentioned will be inexpensive and simple combined case cooling with vapor extraction provided.

Durch das Bereitstellen eines Luftkanals mit Strömungsverbindungen sowohl zur Backmuffel für den Wrasenluftstrom als auch zum Außenbereich der Backmuffel für den Kühlluftstrom kann eine gute Vermischung des Wrasens mit der Kühlluft vorgenommen werden, so daß die Mischung als gemeinsame Abluft eine verminderte Belastung der Umgebungsluft bedeutet.By providing an air duct with flow connections both for the baking muffle for the vapor air flow and also to the outside of the baking muffle for the cooling air flow can mix the vapors well with the cooling air be made so that the mixture as common exhaust air a reduced pollution of the ambient air means.

Vorteilhafterweise ist das Lüfterrad für den Kühlluftstrom ein Axial-Lüfterrad und das Lüfterrad für den Wrasen-Luftstrom ein Radial-Lüfterrad. Bei einer Auslegung der Lüfterräder für ein Verhältnis Kühlluft:Wrasenabluft = 20:1 erfolgt eine optimale Kühlung, sowie ein optimaler Abzug des Wrasens bei gleichzeitiger Minimierung der Geräuschentwicklung und niedriger Energieaufnahme.The fan wheel for the cooling air flow is advantageous an axial fan wheel and the fan wheel for the vapor air flow a radial fan wheel. When interpreting the Fan wheels for a ratio of cooling air: vapor exhaust air = 20: 1 there is an optimal cooling and an optimal deduction fumes while minimizing noise and low energy consumption.

Der Motor kann zwischen dem Lüfterrad für den Kühlluftstrom und dem Lüfterrad für den Wrasen-Luftstrom angeordnet sein, wobei er im Kühlluftstrom liegt, wodurch zusätzlich eine Kühlung des Motors bewirkt wird. Einen günstigen Wirkungsgrad für die jeweiligen Lüfterräder erzielt man dadurch, daß sie jeweils in der Strömungsverbindung, insbesondere in der Öffnung des Luftkanals zur Außenumgebung der Backmuffel bzw. in der Öffnung des Luftkanals zur Backmuffel hin angeordnet sind.The motor can be between the fan wheel for the cooling air flow and the fan wheel for the vapor air flow, whereby it lies in the cooling air flow, whereby an additional Cooling the motor is effected. Favorable efficiency for the respective fan wheels, that they are in each case in the flow connection, in particular in the opening of the air duct to the outside of the baking muffle or arranged in the opening of the air duct to the baking muffle are.

Für bestimmte Raumbedingungen in dem Backofen kann der Luftkanal kann auch zweiteilig ausgebildet sein und für den Wrasen und die Kühlluft jeweils einen getrennten Kanal aufweisen, die dann zu einem Mischbereich führen, in dem beide Ströme miteinander gemischt werden, so daß der Wrasen nicht in Reinform in der Umgebung verbleibt.For certain room conditions in the oven, the Air duct can also be formed in two parts and for the Vapors and the cooling air each have a separate duct, which then lead to a mixing area in which both Streams are mixed together so that the vapors do not remains in its pure form in the area.

Konstruktionstechnisch kann günstigerweise vorgesehen sein, eine Platte, die auch zur Aufnahme des Motors dient, so auszuformen, daß sie gemeinsam mit vorgefertigten Seitenund Verbindungswänden den Kanal bildet.In terms of construction technology, it can advantageously be provided that a plate that also serves to hold the motor, so form that they together with prefabricated pages and Connecting walls form the channel.

In den übrigen Unteransprüchen sind weitere vorteilhafte Ausgestaltungen der Vorrichtung zum Belüften angegeben. In the remaining subclaims there are further advantageous ones Refinements of the device for ventilation indicated.

Nachfolgend wird die Erfindung anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

  • Fig. 1 eine schematische Schnittdarstellung durch einen Backofen;
  • Fig. 2 eine schematische Darstellung des Details II aus Fig. 1 und
  • Fig. 3 eine Ansicht auf das Radial-Lüfterrad aus Richtung III.
    • The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawings. Show it:
  • Figure 1 is a schematic sectional view through an oven.
  • Fig. 2 is a schematic representation of the detail II of Fig. 1 and
  • Fig. 3 is a view of the radial fan wheel from the direction III.

    • In Fig. 1 ist eine schematische Darstellung eines Backofens 2 mit einer Vorrichtung zum Belüften 1 dargestellt. Der Backofen ist mit einer Backmuffel 3 versehen, an deren Oberseite die Vorrichtung 1 angeordnet ist. Die Vorrichtung zum Belüften weist für den gemeinsamen Abzug von Kühlluft und Wrasen einen Luftkanal 5 auf, der an seinem in der Zeichnung rechten Ende zur Vorderseite 18 des Backofens 2 ausmündet und auf seiner in der Zeichnung linken Seite zur Backmuffel 3 gerichtet eine Strömungsverbindung 6 für den Wrasen-Luftstrom 7 und gegenüberliegend eine Strömungsverbindung 8 für den Kühlluftstrom 9 für die Außenumgebung 10 der Backmuffel 3 besitzt. In dem Backofen 2 können in der Zeichnung nicht dargestellte Leitbleche oder Kanalanordnungen für den Kühlluftstrom an der Außenseite der Backmuffel vorgesehen sein.In Fig. 1 is a schematic representation of an oven 2 shown with a device for ventilation 1. The Oven is provided with a baking muffle 3, at the Top of the device 1 is arranged. The device for ventilation points for the joint extraction of cooling air and vapors an air duct 5 which is connected to its in the Drawing right end to front 18 of oven 2 flows out and on its left in the drawing to Baking muffle 3 directed a flow connection 6 for the Vapor air flow 7 and opposite a flow connection 8 for the cooling air flow 9 for the outside environment 10 the baking muffle 3. In the oven 2 can in the Drawing not shown baffles or channel arrangements for the cooling air flow on the outside of the baking muffle be provided.

    In der Strömungsverbindung 8 für den Kühlluftstrom 9 ist ein erstes Lüfterrad 11 und in der Strömungsverbindung 6, d.h. der Öffnung des Luftkanals 5 zur Backmuffel 3 hin, ein zweites Lüfterrad 12 angeordnet. In dem dargestellten Ausführungsbeispiel ist in dem Zwischenraum zwischen den beiden Lüfterrädern 11 ein Motor 4 angeordnet, dessen Motorwelle eine gemeinsame Welle 13 für das erste Lüfterrad 11 und das zweite Lüfterrad 12 bildet.In the flow connection 8 for the cooling air flow 9 a first fan wheel 11 and in the flow connection 6, i.e. the opening of the air duct 5 towards the baking muffle 3 second fan wheel 12 arranged. In the illustrated embodiment is in the space between the two Fan wheels 11 arranged a motor 4, the motor shaft a common shaft 13 for the first fan wheel 11 and forms the second fan wheel 12.

    Das erste Lüfterrad für den Kühlluftstrom 9 ist als Axial-Lüfterrad ausgebildet, wohingegen das zweite Lüfterrad für den Wrasen-Luftstrom 7 ein Radial-Lüfterrad ist.The first fan wheel for the cooling air flow 9 is an axial fan wheel trained, whereas the second fan wheel for the vapor air flow 7 is a radial fan wheel.

    Für die Gehäusekühlung ist somit ein Axial-Ventilator vorgesehen, der aufgrund seiner Charakteristik bei geringen Geräuschemissionen und hohem Wirkungsgrad einen großen Volumenstrom bei wenig Gegendruck fördert. Der Radial-Ventilator für die Wrasen-Absaugung besitzt aufgrund seiner Charakteristik einen hohen Wirkungsgrad für den geringen Volumenstrom bei hohem Gegendruck und erbringt nur eine geringe Geräuschemission. Da die beiden Lüfterräder auf einer Welle sitzen, ist eine genaue Abstimmung erforderlich, um bei der gleichen Drehzahl die jeweils erforderlichen Volumenströme zu fördern. Die Volumenströme haben bei dem dargestellten Ausführungsbeispiel ein Verhältnis von Kühlluftstrom:Wrasen-Luftstrom = 20:1.An axial fan is therefore provided for cooling the housing, which due to its characteristics at low Noise emissions and high efficiency a large volume flow with little back pressure. The radial fan for the vapor extraction due to its Characteristic high efficiency for the low Volume flow at high back pressure and produces only a low Noise emission. Since the two fan wheels on one To sit wave, precise coordination is required to the required volume flows at the same speed to promote. The volume flows have the shown Embodiment shows a ratio of cooling air flow: vapor air flow = 20: 1.

    Das Radial-Lüfterrad 12 kann als einfaches Rad ohne Deckscheibe a) mit rückwärts gekrümmten, b) mit radial endenden oder c) mit vorwärts gekrümmten Schaufeln, als Rad mit Deckscheibe (ebenfalls alle drei Varianten a), b) und c)) oder als Trommelläufer ausgebildet sein.The radial fan wheel 12 can be a simple wheel without a cover disk a) with backward curved, b) with radially ending or c) with forward curved blades, as a wheel with Cover plate (also all three variants a), b) and c)) or be designed as a drum rotor.

    In dem dargestellten Ausführungsbeispiel ist der Motor zwischen dem Radial-Lüfter und dem Axial-Lüfter angeordnet. Bei einer nicht dargestellten Ausführungsform kann der Motor außerhalb des Luftkanals, z.B. oberhalb der Strömungsverbindung 8 für den Kühlluftstrom vorgesehen sein, so daß der Radial-Lüfter und der Axial-Lüfter im wesentlichen nebeneinander angeordnet sind. In the illustrated embodiment, the engine is between the radial fan and the axial fan. In an embodiment not shown, the motor outside the air duct, e.g. above the flow connection 8 be provided for the cooling air flow, so that the radial fan and the axial fan essentially side by side are arranged.

    Wie insbesondere aus den Fig. 2 und 3 zu erkennen ist, ist der Luftkanal 5 im Bereich des Lüfterräder 11 und 12 in einen Luftkanal 14 und einen Wrasen-Kanal 15 geteilt. Der Wrasen-Kanal 15 weist eine Platte 17 auf, die den Luftkanal vom Wrasen-Kanal trennt und als Basis für die Befestigung des Motors dient. Unter der Platte 17 ist das Spiralgehäuse für das Radialrad angeordnet. Der Kanal 5 wird von den Seiten- und Verbindungswänden 5' bis 5''' und der Platte 17 gebildet, wobei diese Platte einerseits und die Wände andererseits jeweils einzeln hergestellte Bauteile sein können.As can be seen in particular from FIGS. 2 and 3 the air duct 5 in the area of the fan wheels 11 and 12 Air duct 14 and a vapor duct 15 shared. The Vapor duct 15 has a plate 17 which forms the air duct separates from the vapor channel and as the basis for the attachment of the engine. Under the plate 17 is the volute arranged for the radial wheel. Channel 5 is and connecting walls 5 'to 5' '' and the plate 17 formed, this plate on the one hand and the walls on the other can be individually manufactured components.

    In Fig. 2 ist eine weitere Ausführungsform in gestrichelter Darstellung gezeigt. Die jeweiligen Ströme der Kühlluft und des Wrasens sind in getrennten Kanälen 14 und 15 bis zu einem Mischbereich 16 geführt. Dort werden beide Ströme wieder zusammengeführt. Der Mischbereich 16 kann auch außerhalb der Backofens unmittelbar am Austritt der beiden Kanäle liegen.2 shows a further embodiment in dashed lines Representation shown. The respective flows of cooling air and of the fumes are in separate channels 14 and 15 up to one Mixing area 16 out. Both streams are there again merged. The mixing area 16 can also be outside the oven immediately at the outlet of the two channels lie.

    In einer weiteren nicht dargestellten Ausführungsform kann der Motor auch außerhalb des Kanals angeordnet sein, und der Antrieb der die beiden Lüfterräder 11 und 12 tragenden gemeinsamen Welle 13 über einen Riementrieb erfolgen. Bei bestimmten Ausführungsformen kann auch vorgesehen sein, daß die Lüfterräder 11 und 12 auf getrennten Wellen laufen, die jeweils mit unterschiedlicher Drehzahl von dem gemeinsamen Motor über separate Riementriebe angetrieben werden.In a further embodiment, not shown the motor can also be arranged outside the duct, and the drive of the two fan wheels 11 and 12 common shaft 13 take place via a belt drive. at certain embodiments can also be provided that the fan wheels 11 and 12 run on separate shafts that each with a different speed from the common Motor driven by separate belt drives.

    Es versteht sich, daß in dem Backofengehäuse wie auch in der Backmuffel entsprechende Öffnungen für Zuluft vorgesehen sind.It goes without saying that in the oven housing as well as in corresponding openings for supply air are provided for the baking muffle are.

    Claims (16)

    1. A device for ventilating (1) a baking oven (2) with a baking muffle (3) having ventilation means and at least one motor (4), characterized by at least one air duct (5) for discharging cooling air and vapours, having at least a first flow connection (6) for discharging a vapour air flow (7) out of the baking muffle (3) and at least a second flow connection (8) for discharging a cooling air flow (9) for the exterior (10) of the baking muffle (3), the motor (4) driving a first fan wheel (11) for the cooling air flow (9) as well as a second fan wheel (12) for the vapour air flow (7).
    2. A device as claimed in claim 1, characterized in that the fan wheel (11) for the cooling air flow (9) is an axial flow fan wheel.
    3. A device as claimed in claim 1 or 2, characterized in that the fan wheel (12) for the vapour air flow (7) is a radial flow fan wheel.
    4. A device as claimed in one of claims 1 to 3, characterized in that the fan wheels (11, 12) are adapted to a relation of the cooling air and vapour discharge air flows of 20:1.
    5. A device as claimed in one of claims 1 to 4, characterized in that the two fan wheels (11, 12) are arranged on a common shaft (13).
    6. A device as claimed in one of claims 1 to 5, characterized in that the axial flow fan wheel (11) is arranged in the first flow connection (6) for the cooling air flow (9) and the radial flow fan wheel (12) is arranged in the flow connection (8) for the vapour air flow (7).
    7. A device as claimed in one of claims 1 to 6, characterized in that the motor (4) is arranged between the two fan wheels (12, 13) and that the common shaft (13) includes the motor shaft.
    8. A device as claimed in one of claims 1 to 7, characterized in that the motor (4) is arranged in the cooling air flow (9).
    9. A device as claimed in one of the preceding claims 1 to 8, characterized in that the at least one air duct (5) is arranged on the top of the baking muffle (3) with an outlet at the front side (18) of the baking oven (2).
    10. A device as claimed in one of claims 1 to 9, characterized in that the air duct (5) is provided as a common duct for the joint discharge of cooling air and vapour.
    11. A device as claimed in one of claims 1 to 10, characterized in that in the area of the flow connection (6, 8), the respective airflows are conducted over a predetermined distance in separate ducts (air duct 14, vapour duct 15).
    12. A device as claimed in claim 11, characterized by a mixing area (16) in which vapour and cooling air are mixed together.
    13. A device as claimed in one of claims 1 to 12, characterized in that the motor (4) is mounted on a plate (17) in the air duct (5).
    14. A device as claimed in one of claims 1 to 13, characterized in that below the plate (17) the spiral casing of the radial flow fan is formed.
    15. A device as claimed in one of claims 1 to 14, characterized in that the at least one air duct (5) is formed by side walls and connecting walls (5' - 5"') arranged to form a duct and the plate (17).
    16. A device as claimed in one of claims 1 to 15, characterized in that the air duct (5), the motor (4) and the mounting form a pre-assembled component which can be mounted on the baking muffle.
    EP98122378A 1997-12-23 1998-11-25 Device for ventilation of baking stove with muffle Revoked EP0926448B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19757640A DE19757640C5 (en) 1997-12-23 1997-12-23 Device for ventilating a baking oven with baking muffle
    DE19757640 1997-12-23

    Publications (3)

    Publication Number Publication Date
    EP0926448A2 EP0926448A2 (en) 1999-06-30
    EP0926448A3 EP0926448A3 (en) 1999-07-21
    EP0926448B1 true EP0926448B1 (en) 2003-04-09

    Family

    ID=7853241

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98122378A Revoked EP0926448B1 (en) 1997-12-23 1998-11-25 Device for ventilation of baking stove with muffle

    Country Status (2)

    Country Link
    EP (1) EP0926448B1 (en)
    DE (2) DE19757640C5 (en)

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    EP3012537A1 (en) 2014-10-23 2016-04-27 Electrolux Appliances Aktiebolag Kitchen oven comprising an airflow propelled fan wheel
    EP3059504A1 (en) 2015-02-19 2016-08-24 Electrolux Appliances Aktiebolag Kitchen oven

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    DE10211522A1 (en) * 2002-03-15 2003-09-25 Bsh Bosch Siemens Hausgeraete Oven, especially with a mechanism for pyrolytic self-cleaning comprises a controllable flap for controlling the airflow into oven
    DE102005044691A1 (en) * 2005-09-19 2007-03-22 BSH Bosch und Siemens Hausgeräte GmbH High-mounting cooking appliance, has suction channel provided for fan arranged for vapors to reach suction channel from open vapor outlet
    KR100698204B1 (en) * 2005-12-12 2007-03-22 엘지전자 주식회사 Electric oven range
    ITVR20060001A1 (en) * 2006-01-10 2007-07-11 Societa Europea Componenti Elettrici Spa FAN, PARTICULARLY FOR VENTILATION OF KITCHEN OVENS
    DE102007059770A1 (en) * 2007-12-12 2009-06-18 BSH Bosch und Siemens Hausgeräte GmbH Cooking arrangement used in the home comprises a guiding region which connects an inlet opening with a mixing unit in a linear manner
    KR20130142281A (en) * 2012-06-19 2013-12-30 삼성전자주식회사 Cooking appliance
    ITTO20130849A1 (en) 2013-10-18 2015-04-19 Indesit Co Spa DOMESTIC COOKING APPLIANCE
    EP2980489A1 (en) * 2014-07-30 2016-02-03 Elica S.p.A. Device for cooling the handle of an oven
    EP3249304B1 (en) 2016-05-25 2021-11-03 Electrolux Appliances Aktiebolag Cooking oven with a cooling system
    US11339974B2 (en) 2019-03-21 2022-05-24 Bsh Home Appliances Corporation Multifunctional steam cooking appliance with active air inlet
    DE102019216343A1 (en) * 2019-10-23 2021-04-29 BSH Hausgeräte GmbH Cooking device with specific supply air device

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    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP3012537A1 (en) 2014-10-23 2016-04-27 Electrolux Appliances Aktiebolag Kitchen oven comprising an airflow propelled fan wheel
    EP3059504A1 (en) 2015-02-19 2016-08-24 Electrolux Appliances Aktiebolag Kitchen oven

    Also Published As

    Publication number Publication date
    DE19757640C5 (en) 2007-04-05
    DE19757640B4 (en) 2004-03-04
    EP0926448A3 (en) 1999-07-21
    DE59807847D1 (en) 2003-05-15
    DE19757640A1 (en) 1999-06-24
    EP0926448A2 (en) 1999-06-30

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