EP0598211B1 - Oven, in particular pyrolytic self-cleaning oven - Google Patents

Oven, in particular pyrolytic self-cleaning oven Download PDF

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Publication number
EP0598211B1
EP0598211B1 EP93116190A EP93116190A EP0598211B1 EP 0598211 B1 EP0598211 B1 EP 0598211B1 EP 93116190 A EP93116190 A EP 93116190A EP 93116190 A EP93116190 A EP 93116190A EP 0598211 B1 EP0598211 B1 EP 0598211B1
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EP
European Patent Office
Prior art keywords
baking oven
flow
damper
cooling air
section
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EP93116190A
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German (de)
French (fr)
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EP0598211A1 (en
Inventor
Josef Gerl
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • 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
    • 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 invention relates to an oven, in particular with a device for pyrolytic Self-cleaning according to the preamble of claim 1.
  • Such an oven is known from the document DE-OS-28 56 094, in the area the opening for the extraction of the vapor a device for measuring the in the extracting Vapors contained moisture is arranged.
  • the moisture measuring device is part of a control device that regulates the air flow through the baking and roasting room.
  • the present invention has for its object an oven in the preamble of claim 1 type to improve so that an automatic adjustment the fume hood to the respective operating mode of the oven is made possible.
  • the knowledge obtained from practice is shown in takes into account in a special way that with different cooking processes in the oven or more with pyrolytic self-cleaning operation with extremely high oven temperature or less vapors. So one becomes only slightly with the microwave operation heated oven try to extract as much vapor and water vapor as possible, for annoying condensation of the vapors, especially at the viewing window of the Prevent oven door largely. On the other hand, it is self-cleaning and If the oven heats up excessively, the periphery of the oven is effective to cool, i.e. by means of a cooling air blower through the muffle wall to dissipate heat escaping to the outside, but not to the inside of the oven Heavily heated air (vapors) used for heat cleaning.
  • the cooling air blower with high suction power to operate, in the former case for the purpose of extracting the vapor from the cooking space the oven and in the second case for cooling the baking room environment.
  • the adaptation of the vapor extraction to the different operating conditions now serves the choke provided in the oven according to the invention, which depends on the temperature and / or the humidity of the fluid flowing through the vapor opening Wrasens automatically adjusted in the sense that at a low oven temperature and at a correspondingly low temperature of the vapor, the flow cross section is as large as possible and at a very high temperature, e.g. the flow cross-section in self-cleaning mode is reduced or closed.
  • This automatic adjustment can be done in use of a bimetal element as a throttle.
  • a bimetal element as a throttle.
  • the temperature drops at a high vapor temperature Water vapor content, so that the aforementioned cooling effect is not takes place and a gradual reduction in the flow cross-section he follows.
  • the oven muffle 1 is inside an oven housing 1 an oven muffle open to the front 2 with surrounding Isolation 3 arranged.
  • the oven muffle 2 can be closed through an oven door 4 that delimits the front is through a glass plate 5.
  • a door handle 6 At the upper limit of the Door 4 is a door handle 6 with recessed grip 7.
  • a motor-driven cooling air blower 9 e.g. a Cross-flow fan
  • a switch room 11 in e.g. an electronic control, an electronic clock 12 and the like. is arranged.
  • the flow is indicated by arrows that sucked in from the outside by the cooling air blower 9 Cooling air indicated.
  • This cooling air flows around the handle 6 and the switch room 11 and is through the flow shaft 8 led out to the front.
  • the drawing does not show that for heating the interior the oven muffle 2, or the food to be stored therein required Agents such as electric heating elements, a forced air fan, a microwave generator and the like.
  • This Means are well known. 1 also shows a vapor opening 15 is provided in the upper oven wall 14, which is followed by a flow channel 16/17 from a first, vertical channel section 16, which runs through the flow shaft 8 and from a horizontal Channel section 17, along the cooling air flow shaft runs and there directly to the Suction opening 13 of the cooling air blower 9 connects.
  • FIG. 2 consists of the vertical channel section 16 again two pluggable and against each other by means of a seal 18 sealed pipe socket 16a and 16b, wherein the pipe socket 16a funnel-like towards the vapor opening 15 is expanded and is surrounded there by the insulation 3.
  • 19 is a throttle designed as a bimetallic element, the up at low ambient temperature is bent and thus the upper outlet of the pipe socket 16b and thus the flow channel 16/17 fully opens and at high ambient temperature or when the flow is very hot Vapors from inside the oven muffle 2 accordingly the arrows in the dashed shown closed position automatically adjusted in which the flow channel 16/17 is at least largely closed is.
  • This closed position is reached at Muffle temperature and thus at a temperature of escaping vapors of about 350 ° C, i.e. at the beginning of a pyrolytic self-cleaning process.
  • the opposite is the case maximum opening position of the throttle 19 obtained during operation the oven at low temperature, e.g. with microwave operation, in an operating mode in which the vapor is relatively cool, but has a high water vapor content having. Since the throttle 19 on a relative cool place at a distance above the oven muffle 2, the water vapor at throttle 19, i.e. condense on the bimetallic element and through it associated cooling effect an adjustment of the throttle 19 in favor the maximum opening position. With increasing Increasing the vapor temperature is gradually reduced of the flow cross section.
  • the flap 20 in the dashed Adjusted position and thus not only the flow channel 16/17 further closes, but practically the whole Cross section of the suction opening 13 preferably in the first Third in which a particularly strong suction effect is achieved is released for the suction of the ambient air, so that a maximum cooling effect in the vicinity of the furnace muffle 2 is obtained.

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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)
  • Electric Stoves And Ranges (AREA)
  • Electric Ovens (AREA)
  • Baking, Grill, Roasting (AREA)

Description

Die Erfindung bezieht sich auf einen Backofen, insb. mit einer Einrichtung für pyrolytische Selbstreinigung gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to an oven, in particular with a device for pyrolytic Self-cleaning according to the preamble of claim 1.

Ein derartiger Backofen ist bekannt aus der Druckschrift DE-OS-28 56 094, wobei im Bereich der Öffnung zum Abzug des Wrasens eine Vorrichtung zur Messung der in den abziehenden Wrasen enthaltenen Feuchtigkeit angeordnet ist. Die Feuchtigkeit-Messvorrichtung ist Teil eines den Luftdurchsatz durch den Back- und Bratraum regelnden Steuergerätes.Such an oven is known from the document DE-OS-28 56 094, in the area the opening for the extraction of the vapor a device for measuring the in the extracting Vapors contained moisture is arranged. The moisture measuring device is part of a control device that regulates the air flow through the baking and roasting room.

Bei einem auch bekannten Mikrowellenherd mit einer pyrolytischen Selbstreinigungseinrichtung im Garraum (DE 26 21 149 A1) ist in der oberen Ofenwand ein sogenannter Katalysator angeordnet, an den sich ein Abluftstutzen anschließt, an dessen Ende eine Drosselscheibe vorgesehen ist, über die während dem Selbstreinigungsbetrieb die durch den Katalysator und den Abluftstutzen hindurch mittels eines Gebläses abzusaugende Abluftmenge in Anpassung an das Druckgefälle des Gebläses und die unterschiedlichen konstruktiven Gegebenheiten einregulierbar ist.In a known microwave oven with a pyrolytic self-cleaning device In the cooking space (DE 26 21 149 A1) there is a so-called catalyst in the upper oven wall arranged, which is followed by an exhaust port, at the end of a throttle disc is provided, through which during the self-cleaning operation by the catalyst and the amount of exhaust air to be extracted through the exhaust port by means of a blower in adaptation to the pressure drop of the blower and the different design Conditions can be adjusted.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Backofen der im Oberbegriff des Patentanspruches 1 genannten Art so zu verbessern, daß eine selbsttätige Anpassung des Wrasenabzuges an die jeweilige Betriebsart des Backofens ermöglicht wird. The present invention has for its object an oven in the preamble of claim 1 type to improve so that an automatic adjustment the fume hood to the respective operating mode of the oven is made possible.

Diese Aufgabe wird gemäß der Erfindung gelöst durch die im Patentanspruch 1 angegebenen Maßnahmen. Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den nachfolgenden Patentansprüchen.This object is achieved according to the invention by those specified in claim 1 Activities. Advantageous embodiments of the invention result from the following Claims.

Bei dem erfindungsgemäßen Backofen wird die sich aus der Praxis ergebende Erkenntnis in besonderer Weise berücksichtigt, daß bei unterschiedlichen Garvorgängen im Backofen bzw. bei pyrolytischem Selbstreinigungsbetrieb mit extrem hoher Backofentemperatur mehr oder weniger stark Wrasen anfällt. So wird man etwa bei Mikrowellenbetrieb des nur geringfügig erwärmten Backofens versuchen, möglichst viel Wrasen und damit Wasserdampf abzusaugen, um eine störende Kondensation des Wrasens insb. am Durchsichtfenster der Backofentür weitgehend zu verhindern. Andererseits ist es bei Selbstreinigungsbetrieb und bei extrem starker Erhitzung des Backofens notwendig, die Peripherie des Backofens wirksam zu kühlen, d.h. mittels eines Kühlluftgebläses die durch die Muffelwandung hindurch nach außen austretende Wärme abzuführen, nicht jedoch die im Inneren des Backofens der Hitzereinigung dienende, stark erhitzte Luft (Wrasen). In beiden Extremfällen ist es - allerdings mit unterschiedlicher Zielrichtung - angebracht, das Kühlluftgebläse mit hoher Saugleistung zu betreiben, im erstgenannten Fall zwecks Absaugung des Wrasens aus dem Garraum des Backofens und im zweitgenannten Fall zwecks Kühlung der Backraum-Umgebung. Der Anpassung des Wrasenabzugs an die unterschiedlichen Betriebsbedingungen dient nun die beim erfindungsgemäßen Backofen vorgesehene Drossel, die sich in Abhängigkeit von der Temperatur und/oder von der Feuchtigkeit des durch die Wrasenöffnung hindurchströmenden Wrasens selbsttätig verstellt, in dem Sinne, daß bei niedriger Backofentemperatur und bei entsprechend niedriger Temperatur des Wrasens der Strömungsquerschnitt möglichst groß ist und bei stark erhöhter Temperatur, z.B. bei Selbstreinigungsbetrieb der Strömungsquerschnitt vermindert bzw. verschlossen wird. In einfachster Weise kann diese selbsttätige Verstellung erfolgen bei Anwendung eines Bimetallelementes als Drossel. Hierbei wird bei niedriger Betriebstemperatur des Backofens und bei entsprechend hohen Wasserdampfgehalt im Wrasen eine möglichst weite Öffnung des Strömungsquerschnittes dadurch begünstigt, daß der Wasserdampf am relativ kühlen Bimetallelement kondensiert und damit durch die damit verbundene VerdampfungsKühlwirkung eine Öffnungsbewegung des Bimetallelementes bewirkt. Andererseits sinkt bei hoher Wrasentemperatur der Wasserdampfanteil, so daß die vorgenannte Kühlwirkung nicht stattfindet und eine sukzessive Verminderung des Strömungsquerschnittes erfolgt.In the oven according to the invention, the knowledge obtained from practice is shown in takes into account in a special way that with different cooking processes in the oven or more with pyrolytic self-cleaning operation with extremely high oven temperature or less vapors. So one becomes only slightly with the microwave operation heated oven try to extract as much vapor and water vapor as possible, for annoying condensation of the vapors, especially at the viewing window of the Prevent oven door largely. On the other hand, it is self-cleaning and If the oven heats up excessively, the periphery of the oven is effective to cool, i.e. by means of a cooling air blower through the muffle wall to dissipate heat escaping to the outside, but not to the inside of the oven Heavily heated air (vapors) used for heat cleaning. In both extreme cases it is - however with different directions - attached, the cooling air blower with high suction power to operate, in the former case for the purpose of extracting the vapor from the cooking space the oven and in the second case for cooling the baking room environment. The adaptation of the vapor extraction to the different operating conditions now serves the choke provided in the oven according to the invention, which depends on the temperature and / or the humidity of the fluid flowing through the vapor opening Wrasens automatically adjusted in the sense that at a low oven temperature and at a correspondingly low temperature of the vapor, the flow cross section is as large as possible and at a very high temperature, e.g. the flow cross-section in self-cleaning mode is reduced or closed. In the simplest This automatic adjustment can be done in use of a bimetal element as a throttle. Here will when the oven is operating at a low temperature and accordingly a high water vapor content in the vapors if possible wide opening of the flow cross section favors that the water vapor condenses on the relatively cool bimetal element and thus through the associated evaporative cooling effect causes an opening movement of the bimetallic element. On the other hand, the temperature drops at a high vapor temperature Water vapor content, so that the aforementioned cooling effect is not takes place and a gradual reduction in the flow cross-section he follows.

Gemäß einer vorteilhaften Weiterbildung der Erfindung ist im Verlauf des Wrasen-Strömungskanales zusätzlich zur vorgenannten Drossel eine ebenfalls in Abhängigkeit von der Wrasentemperatur und/oder Feuchtigkeit selbsttätig verstellbare Klappe vorgesehen, die ebenfalls selbsttätig den Strömungsquerschnitt am gebläseseitigen Ende des Strömungskanales verändert und auf diese Weise die unmittelbar anschließende Ansaugöffnung des Kühlluftgebläses mehr oder weniger frei gibt für die Absaugung der z.B. im Selbstreinigungsfalle stark erhitzten Luft in der Umgebung des Backofens.According to an advantageous development of the invention Course of the vapor flow channel in addition to the aforementioned Throttle one also depending on the vapor temperature and / or moisture automatically adjustable Flap provided, which also automatically the flow cross-section at the blower end of the flow channel changed and in this way the immediately following Intake opening of the cooling air blower more or less free for the extraction of e.g. in the case of self-cleaning very hot air around the oven.

Die Erfindung ist anhand von in der Zeichnung dargestellten Ausführungsbeispielen nachstehend erläutert. Es zeigt:

Fig. 1
die schematische Darstellung eines Backofens in Schnittansicht mit angedeuteten Mitteln zur Wrasenabführung,
Fig. 2 und 3
eine vergrößerte Darstellung der Mittel zur Wrasenabführung in zwei unterschiedlichen Varianten.
The invention is explained below with reference to exemplary embodiments shown in the drawing. It shows:
Fig. 1
the schematic representation of a baking oven in a sectional view with indicated means for evaporation,
2 and 3
an enlarged view of the means for vapor removal in two different variants.

Beim Backofen gemäß Fig. 1 ist innerhalb eines Ofengehäuses 1 eine zur Frontseite hin offene Ofenmuffel 2 mit sie umgebender Isolation 3 angeordnet. Die Ofenmuffel 2 ist verschließbar durch eine Ofentür 4, die frontseitig begrenzt ist durch eine Glasplatte 5. An der oberen Begrenzung der Tür 4 befindet sich ein Türgriff 6 mit Griffmulde 7. Mit Abstand oberhalb der Ofenmuffel 2 bzw. deren Isolation 3 befindet sich ein Strömungsschacht 8, an dessen einem Ende ein motorisch angetriebenes Kühlluftgebläse 9, z.B. ein Querstromgebläse, angeordnet ist und dessen anderes, frontseitiges Ende eine Ausblasöffnung 10 besitzt. Oberhalb des Strömungsschachtes 8 befindet sich ein Schalterraum 11, in dem z.B. eine Elektroniksteuerung, eine Elektronikuhr 12 und dergl. angeordnet ist. Durch Pfeile ist der Strömungsverlauf der vom Kühlluftgebläse 9 von außen her angesaugten Kühlluft angedeutet. Diese Kühlluft umströmt den Handgriff 6 sowie den Schalterraum 11 und wird durch den Strömungsschacht 8 hindurch zur Frontseite hin nach außen abgeführt. Die Zeichnung zeigt nicht die zur Erhitzung des Innenraumes der Ofenmuffel 2, bzw. des darin gelagerten Gargutes erforderliche Mittel wie z.B. elektrische Heizelemente, ein Umluftgebläse, einen Mikrowellengenerator und dergl.. Diese Mittel sind allgemein bekannt. Wie Fig. 1 ferner zeigt, ist in der oberen Backofenwand 14 eine Wrasenöffnung 15 vorgesehen, an die sich ein Strömungskanal 16/17 anschließt, bestehend aus einem ersten, senkrechten Kanalabschnitt 16, der den Strömungsschacht 8 durchzieht und aus einem waagerechten Kanalabschnitt 17, der längs des Kühlluft-Strömungsschachtes verläuft und dort sich unmittelbar an die Ansaugöffnung 13 des Kühlluftgebläses 9 anschließt.1 is inside an oven housing 1 an oven muffle open to the front 2 with surrounding Isolation 3 arranged. The oven muffle 2 can be closed through an oven door 4 that delimits the front is through a glass plate 5. At the upper limit of the Door 4 is a door handle 6 with recessed grip 7. With Distance above the muffle 2 or its insulation 3 there is a flow shaft 8 at one end a motor-driven cooling air blower 9, e.g. a Cross-flow fan, is arranged and its other, front End has a blowout 10. Above the Flow shaft 8 is a switch room 11, in e.g. an electronic control, an electronic clock 12 and the like. is arranged. The flow is indicated by arrows that sucked in from the outside by the cooling air blower 9 Cooling air indicated. This cooling air flows around the handle 6 and the switch room 11 and is through the flow shaft 8 led out to the front. The drawing does not show that for heating the interior the oven muffle 2, or the food to be stored therein required Agents such as electric heating elements, a forced air fan, a microwave generator and the like. This Means are well known. 1 also shows a vapor opening 15 is provided in the upper oven wall 14, which is followed by a flow channel 16/17 from a first, vertical channel section 16, which runs through the flow shaft 8 and from a horizontal Channel section 17, along the cooling air flow shaft runs and there directly to the Suction opening 13 of the cooling air blower 9 connects.

Wie aus der vergrößerten Darstellung gemäß Fig. 2 erkennbar, besteht der senkrechte Kanalabschnitt 16 wiederum aus zwei zusammensteckbaren und mittels einer Dichtung 18 gegeneinander abgedichteten Rohrstutzen 16a und 16b, wobei der Rohrstutzen 16a zur Wrasenöffnung 15 hin trichterartig erweitert ist und dort von der Isolation 3 umgeben ist. Mit 19 ist eine als Bimetallelement ausgebildete Drossel bezeichnet, die bei niedriger Umgebungstemperatur nach oben gebogen ist und damit den oberen Ausgang des Rohrstutzens 16b und damit den Strömungskanal 16/17 voll öffnet und bei hoher Umgebungstemperatur bzw. bei Strömung von stark erhitztem Wrasen aus dem Inneren der Ofenmuffel 2 entsprechend den eingezeichneten Pfeilen sich in die gestrichelt dargestellte Schließstellung selbsttätig verstellt, in welcher der Strömungskanal 16/17 zumindest weitgehend verschlossen ist. Diese Schließstellung wird erreicht bei einer Muffeltemperatur und damit bei einer Temperatur des ausströmenden Wrasens von etwa 350°C, d.h. bei Beginn eines pyrolytischen Selbstreinigungsvorganges. Umgekehrt wird die maximale Öffnungsstellung der Drossel 19 erhalten bei Betrieb des Backofens mit niedriger Temperatur, z.B. bei Mikrowellenbetrieb, also bei einer Betriebsart, in welcher der Wrasen relativ kühl ist, aber einen hohen Wasserdampfgehalt aufweist. Da sich die Drossel 19 an einer relativ kühlen Stelle mit Abstand oberhalb der Ofenmuffel 2 befindet, wird hierbei der Wasserdampf an der Drossel 19, d.h. an dem Bimetallelement kondensieren und durch die damit verbundene Kühlwirkung eine Verstellung der Drossel 19 in die maximale Öffnungsstellung begünstigen. Bei zunehmender Erhöhung der Wrasentemperatur erfolgt sukzessive eine Verminderung des Strömungsquerschnittes.As can be seen from the enlarged illustration according to FIG. 2, consists of the vertical channel section 16 again two pluggable and against each other by means of a seal 18 sealed pipe socket 16a and 16b, wherein the pipe socket 16a funnel-like towards the vapor opening 15 is expanded and is surrounded there by the insulation 3. With 19 is a throttle designed as a bimetallic element, the up at low ambient temperature is bent and thus the upper outlet of the pipe socket 16b and thus the flow channel 16/17 fully opens and at high ambient temperature or when the flow is very hot Vapors from inside the oven muffle 2 accordingly the arrows in the dashed shown closed position automatically adjusted in which the flow channel 16/17 is at least largely closed is. This closed position is reached at Muffle temperature and thus at a temperature of escaping vapors of about 350 ° C, i.e. at the beginning of a pyrolytic self-cleaning process. The opposite is the case maximum opening position of the throttle 19 obtained during operation the oven at low temperature, e.g. with microwave operation, in an operating mode in which the vapor is relatively cool, but has a high water vapor content having. Since the throttle 19 on a relative cool place at a distance above the oven muffle 2, the water vapor at throttle 19, i.e. condense on the bimetallic element and through it associated cooling effect an adjustment of the throttle 19 in favor the maximum opening position. With increasing Increasing the vapor temperature is gradually reduced of the flow cross section.

Das Ausführungsbeispiel gemäß Fig. 3 stimmt im wesentlichen mit denjenigen gemäß Fig. 2 überein, besitzt aber zusätzlich am gebläseseitigen Ende des Kanalabschnittes 17, das wiederum strömungstechnisch eng an die Ansaugöffnung 13 des Kühlluftgebläses 9 angeschlossen ist, eine ebenfalls als Bimetallelement ausgebildete Klappe 20, die an diesem gebläseseitigen Ende eine obere Begrenzungswand des Strömungskanales 16/17 bildet und entsprechend ihrer thermisch bedingten Ausbiegung den Ausströmquerschnitt an diesem Ende bestimmt. Wie in den Fig. 2 und 3 angedeutet, schließt sich das freie Ende des Strömungskanales 16/17 an das erste Drittel der Ansaugöffnung 13 des als Querstromgebläse ausgebildeten Kühlluftgebläses 9 an. Insb. bei pyrolytischem selbstreinigungsbetrieb ist es nicht nur erwünscht, eine Absaugung der extrem stark erhitzten Luft aus dem Innenraum der Ofenmuffel 2 zu verhindern, sondern es soll das Kühlluftgebläse 9 in einem hohen Maße die ebenfalls erhitzte Luft aus der Umgebung der Ofenmuffel 2 ansaugen und durch den Strömungsschacht 8 hindurch in Pfeilrichtung nach außen abführen. Durch die in Abhängigkeit von der Temperatur und/oder Feuchtigkeit an der Klappe 20 sich verändernde Stellung der Klappe 20 wird erreicht, daß z.B. bei Selbstreinigungsbetrieb die Klappe 20 sich in die gestrichelte Stellung verstellt und damit nicht nur den Strömungskanal 16/17 weiter verschließt, sondern praktisch den gesamten Querschnitt der Ansaugöffnung 13 vorzugsweise im ersten Drittel, in dem eine besonders starke Sogwirkung erzielt wird, für die Ansaugung der Umgebungsluft frei gibt, so daß eine maximale Kühlwirkung in der Umgebung der Ofenmuffel 2 erhalten wird.3 is essentially correct 2, but additionally at the blower end of the duct section 17, the again in terms of flow close to the suction opening 13 of the Cooling air blower 9 is connected, also as Bimetallic element formed flap 20 on the blower side End of an upper boundary wall of the flow channel 16/17 forms and according to their thermal conditional deflection the outflow cross section at this end certainly. As indicated in FIGS. 2 and 3, closes the free end of the flow channel 16/17 to the first Third of the suction opening 13 of the cross-flow fan Cooling air blower 9 on. Esp. with pyrolytic self-cleaning operation, it is not only desirable to have one Extraction of the extremely hot air from the interior to prevent the oven muffle 2, but it is the cooling air fan 9 to a high degree the also heated Suck in air from the surroundings of the oven muffle 2 and through the flow shaft 8 through in the direction of the arrow to the outside dissipate. By depending on the temperature and / or moisture on the flap 20 is changing Position of the flap 20 is achieved that e.g. in self-cleaning mode the flap 20 in the dashed Adjusted position and thus not only the flow channel 16/17 further closes, but practically the whole Cross section of the suction opening 13 preferably in the first Third in which a particularly strong suction effect is achieved is released for the suction of the ambient air, so that a maximum cooling effect in the vicinity of the furnace muffle 2 is obtained.

Claims (10)

  1. Baking oven, especially with equipment for pyrolytic self-cleaning, with a vapour opening which is provided in one baking oven wall and through which the vapour arising in operation of the baking oven can flow away outwardly, wherein the flow cross-section of the vapour opening itself or of an adjoining flow channel is automatically adjustable by a damper, characterised thereby that the adjusting movement of the damper (19) takes place in dependence on the temperature of the vapour, which damper forms a large flow cross-section for small heat development in the baking oven and reduces or closes the flow cross-section for strong heat development.
  2. Baking oven according to claim 1, characterised thereby that the adjusting movement of the damper (19) additionally takes place in dependence on the moistness of the vapour.
  3. Baking oven according to one of the preceding claims, characterised thereby that the damper (19) is arranged at the end of a flow channel (16), which is preferably vertical, at a spacing from the baking oven wall (14).
  4. Baking oven according to claim 3, characterised thereby that the flow channel (16) passes through a cooling air flow shaft (8) connected to a cooling air fan (9).
  5. Baking oven according to one of the preceding claims, characterised thereby that the damper (19) is constructed as a bimetallic element.
  6. Baking oven according to claim 5, characterised thereby that damper (19) is disposed in the closed setting in the case of a temperature of about 350°C of the oufflowing vapour.
  7. Baking oven according to one of the preceding claims, characterised thereby that the flow channel (16/17) consists of at least two channel sections, which stand on one another preferably angularly or vertically, that the damper (19) is arranged at the end of the first channel section (16) and that the free end of the second channel section (17) is connected to the intake opening (13) of the cooling air fan (9) in terms of flow.
  8. Baking oven according to one of the preceding claims, characterised thereby that the free end of the flow channel (16/17) is directly connected to the intake opening (13) of the cooling air fan (9), preferably to the first third thereof.
  9. Baking oven according to claim 8, characterised thereby that an end of the boundary wall of the flow channel (16/17) at the fan side is formed by a flap (20) which is preferably constructed as a bimetallic element, is adjustable in dependence on the temperature and/or moisture and by which the flow channel flow cross-section, which is connected to the intake opening (13) of the cooling air fan (9), is automatically variable.
  10. Baking oven according to claim 7, characterised thereby that the first channel section (16) passes through the cooling air flow shaft (8) and the channel section (17), which is at least approximately perpendicular thereto extends along the cooling air shaft (8).
EP93116190A 1992-11-16 1993-10-06 Oven, in particular pyrolytic self-cleaning oven Expired - Lifetime EP0598211B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4238660A DE4238660C2 (en) 1992-11-16 1992-11-16 Oven, in particular with a device for pyrolytic self-cleaning
DE4238660 1992-11-16

Publications (2)

Publication Number Publication Date
EP0598211A1 EP0598211A1 (en) 1994-05-25
EP0598211B1 true EP0598211B1 (en) 1999-01-13

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Family Applications (1)

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EP93116190A Expired - Lifetime EP0598211B1 (en) 1992-11-16 1993-10-06 Oven, in particular pyrolytic self-cleaning oven

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Country Link
US (1) US5500508A (en)
EP (1) EP0598211B1 (en)
DE (2) DE4238660C2 (en)
ES (1) ES2129479T3 (en)

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US9585400B2 (en) 2004-03-23 2017-03-07 The Middleby Corporation Conveyor oven apparatus and method
US8087407B2 (en) 2004-03-23 2012-01-03 Middleby Corporation Conveyor oven apparatus and method
DE102005003975A1 (en) * 2005-01-28 2006-08-03 Electrolux Home Products Corp. N.V. Cooking appliance
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Publication number Priority date Publication date Assignee Title
US6817282B2 (en) 2000-12-04 2004-11-16 Bsh Bosch Und Siemens Hausgeraete Gmbh Cooker
DE102010063489A1 (en) 2010-12-20 2012-06-21 BSH Bosch und Siemens Hausgeräte GmbH Cooking appliance with vapor extraction device
WO2012084600A1 (en) 2010-12-20 2012-06-28 BSH Bosch und Siemens Hausgeräte GmbH Cooking appliance having vapor extraction means

Also Published As

Publication number Publication date
ES2129479T3 (en) 1999-06-16
DE59309301D1 (en) 1999-02-25
EP0598211A1 (en) 1994-05-25
US5500508A (en) 1996-03-19
DE4238660C2 (en) 1994-09-01
DE4238660A1 (en) 1994-06-09

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