EP2469180B1 - Oven door and oven with a door - Google Patents

Oven door and oven with a door Download PDF

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Publication number
EP2469180B1
EP2469180B1 EP11194280.1A EP11194280A EP2469180B1 EP 2469180 B1 EP2469180 B1 EP 2469180B1 EP 11194280 A EP11194280 A EP 11194280A EP 2469180 B1 EP2469180 B1 EP 2469180B1
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EP
European Patent Office
Prior art keywords
heat
conducting plate
oven door
side panel
oven
Prior art date
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EP11194280.1A
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German (de)
French (fr)
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EP2469180A1 (en
Inventor
Hans Lappat
Armin Miesgang
Stefan Sojer
Christine Thaller
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Priority to PL11194280T priority Critical patent/PL2469180T3/en
Publication of EP2469180A1 publication Critical patent/EP2469180A1/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
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/04—Doors specially adapted for stoves or ranges with transparent panels
    • 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 present invention relates to a oven door according to the preamble of claim 1, as well as an oven with such a oven door.
  • Such a oven door is from the DE 10 2006 042 174 A1 this is known, which serves to close the feed opening of the cooking chamber of a particular pyrolytically self-cleaning oven.
  • the oven door is equipped with a front and a garraum disorderen disc preferably made of glass material.
  • the discs define a gap in which there is a good heat conducting material existing bathleitplatte with a small distance in front of the front pane.
  • the heat-conducting plate has a plurality of small-area, preferably punctiform forms, with which it is supported on the front pane and which define a defined distance between the pane and the heat conducting plate.
  • the DE 10 2008 042 470 A1 an oven, in particular with a device for pyrolytic self-cleaning. Furthermore, the disclosure US 5,562,090 an oven door with a cooling device. Finally, the reveals DE 77 06 648 U1 a transparent heat protection element for roasting ovens and heating chambers. Further relevant prior art is out US 3893442 A and FR 2906875 A1 named.
  • the invention has for its object to improve the said prior art in its function.
  • the heat conducting plate on a guide element which deflects a vertically upward air flow in the direction of the garraum disorderen disc.
  • a normally hot air stream flowing through the intermediate space is kept away from the upper end of the front pane.
  • this can also heat accumulation in the upper region of the front pane are avoided.
  • the distance between the front pane and the heat conducting plate is preferably between one and 15 millimeters, more preferably between two and eight millimeters.
  • the heat-conducting plate consists in particular of a good heat-conducting material, which is better to understand heat than glass.
  • the heat conduction plate is formed such that it reflects an incident from the direction of the garraum disorderen disc heat radiation, so that thereby also the surface temperature of the front pane can be lowered.
  • the heat conduction plate is formed of a metallic material (such as aluminum or stainless steel) having a specular surface, favorable reflection characteristics result.
  • an upper end portion of the door has an air guide, which allows a rear ventilation of the heat conduction in a region between this and the front pane.
  • a parallel secondary air flow is formed to the vertically upward air flow.
  • the distance between the front-side pane and the heat-conducting plate increases. This results in a cross-sectional enlargement for the front side disc and heat conducting plate extending secondary air flow, which accelerates this and consequently a better cooling effect of the front pane is achieved.
  • the guide element is arranged and / or formed on an upper end portion of the heat conducting plate.
  • the guide element is produced in particular by deformation of the heat conducting plate.
  • the guide element extends only over a part of a width of at least 50%, in particular of at least 80% of the heat conducting plate.
  • a design space for additional elements is created, without sacrificing the properties of the below arranged heat conducting plate, such. B. to dispense even heat distribution or heat reflection.
  • the latter can have a depression in an edge region into which a locking element for the oven door can engage. It is preferred if the direction of a deflected air flow with respect to a disc plane at an angle of 10 ° to 90 °, in particular from 45 ° to 80 °.
  • the plane of the disc a plane within which the garraum disorderen disc facing, substantially planar, with the oven door closed vertically arranged outer surface of the front disc is located.
  • the angle of the deflected air flow is between this plane and the direction of the deflected airflow.
  • the direction of the deflected air flow corresponds to a tangent applied to the end of the guide element.
  • an upper end portion of the door is covered by a diaphragm, which forwards the deflected air flow.
  • the deflected air flow is directed, for example, to a cooling air flow of a baking oven, which passes above the door and opens into the open air.
  • the deflected air flow is sucked in by the cooling air flow (Venturi effect) and transported outside.
  • the heat-conducting plate has a system on which the diaphragm is supported.
  • the panel is positioned in the oven door at least in one direction.
  • the system extends over at least 80% of the width of the heat conducting plate, whereby a uniform gap between the front disc and the diaphragm is made possible. If the panel is supported, for example on a left-side and a right-side end of the oven door profile strips on this, a central support of the panel by the system is particularly advantageous. As a result, a deflection of the diaphragm is prevented at a pressure load from above.
  • the heat conducting plate is formed as part of a panel which covers an upper end portion of the door.
  • a panel which covers an upper end portion of the door.
  • the heat-conducting plate causes a reduction in the front temperatures of the front pane. Due to the joint training in one part of this fluidically is particularly inexpensive to produce, since no stage transitions or joining gaps are present.
  • the training as a hybrid part is advantageous in which the heat conducting plate made of metal and the diaphragm is made of plastic. In this case, the heat-conducting plate serves as an insert in a plastic tool.
  • a preferred development consists in that a door handle arranged on the front pane has fastening elements by which the door handle is connected to the front pane and which fastening elements at the same time support the heat conduction plate at a distance from the front pane.
  • By attaching the heat conducting plate with the fasteners of the door handle parts costs and installation costs can be saved.
  • By a spacer element the distance of the heat conducting plate can be set to the front pane in the fasteners. It is advantageous to use an existing protective sleeve for the bearing hole of the front pane (possibly in a slightly modified version) at the same time as a spacer element.
  • the heat-conducting plate has at least one spacer made of a plastic material, then the distance to the front-side pane is determined at least in a partial area of the heat-conducting plate. In particular, when using a plurality of such spacers is given over the surface of the heat conducting a uniform distance of the same to the front pane.
  • the at least one spacer element made of elastomer a rattle-free fastening of the heat-conducting plate in the oven door is provided even when vibrations occur.
  • the spacer element preferably has a fastening element, by means of which the spacer element can be fastened without tools in the heat-conducting plate, for example by a plug-in operation.
  • the spacer element is formed by an embossing in the heat conducting plate, wherein thereby the insulation behavior relative to the front pane, as well as the Klapperte Trent worsen something.
  • Fig. 1 shows a oven door with a front pane 2, to which a door handle 4 is attached.
  • the space-side pane 6 has a bulbous contour, which due to the additionally enclosed air cushion better insulation and associated lower contact temperatures for a user on the front panel 2 occur.
  • a front intermediate disc 8a, and a rear intermediate disc 8b are additionally arranged.
  • a heat-conducting plate 10 is further arranged between the front-side disc 2 and the front intermediate disc 8a, whose upper end portion has a guide element 12.
  • the heat-conducting plate 10 is formed from a thin stainless steel sheet.
  • At a lower end portion of the oven door hinges 14 are fixed, through which the oven door in an oven (not shown) is pivotally mounted.
  • FIG. 2 shows the door handle 4, which is fastened via a fastening screw 16 and a spacer element 18 on the front pane 2.
  • the heat-conducting plate 10 is also held in the upper end portion by the fastening screw 16, wherein the spacer element 18 determines the distance A to the front pane 2.
  • the spacer 18 is formed of elastomer.
  • the handle bar 20 of the door handle 4 is held by a handle bracket 22 spaced from the front pane 2.
  • Two spacer elements 24 are each held by means of a fastening element 26 at a lower end portion of the heat conducting plate 10.
  • the fastening element 26 has a in Substantially mushroom-shaped contour passing through a spacer hole 40 ( FIG. Fig.
  • the heat-conducting plate 10 also has a stiffening embossment 28, which prevents distortion of the heat-conducting plate 10 under the influence of temperature. At the lower end of the heat-conducting plate 10, this has a bend 30 which extends in the direction of the front pane 2.
  • the bend 30 essentially prevents air circulation between the heat-conducting plate 10 and the front pane 2, whereby a standing air cushion is formed whose insulating effect reduces the contact temperatures at the front pane 2.
  • an alternative embodiment (not shown) may be advantageous, which does not have a bend 30.
  • the area between the heat-conducting plate 10 and the front pane 2 is ventilated in a targeted manner and as a result the contact temperature of the front pane is lowered.
  • an air flow V is formed, which extends from a lower end portion of the door substantially vertically upward.
  • This air stream V passes by a surface of the heat-conducting plate 10 facing away from the front pane 2 and is deflected in an upper region of the heat-conducting plate 10 by the guide element 12 before it leaves the door region.
  • the air flow V is thereby deflected by the guide element 12 in the direction of the garraum disorderen disc 6 in an air flow V '.
  • An angle ⁇ between a plane E of the front pane 2 and the air flow V 'or a tangent applied to the upper end section of the guide element has a value of 80 °.
  • a diaphragm 34 is arranged, which serves as a visual screen for the inner door life and on the other hand, the air flow V 'through orifices 35 in the direction of a cooling air flow H.
  • the cooling air flow H is used for cooling a switch room of the oven, as well as for removing the Wrasens the oven (not shown).
  • the cooling air flow H passes above the oven door and takes by the Venturi effect with the air flow V 'to the outside, wherein the air flow V' is deflected according to an air flow V "The transition from the heat conducting plate 10 to the guide element 12 is effected by a bend with the radius R.
  • the guide element After the radius R, the guide element still has a straight section tangentially connected to the radius This straight section forms the system 36, at which the aperture 34 is supported. Between the guide element 12, front disc 2 and aperture 34 forms a cavity B, the insulating air cushion causes lower contact temperatures at the upper end portion 32 of the oven door.
  • Fig. 3 shows the heat conducting plate 10 in an outgoing from the garraum disorderen disc 6 viewing direction, which has a width Bw and at the upper end portion of the guide element 12 is arranged.
  • the width BI of Leitelemtnts 12 is narrower than the width Bw of the heat conducting plate 10.
  • An upper edge of the guide element forms the system 36, which extends over the entire width BI.
  • the heat-conducting plate 10 also has two handle fastening holes 38 in an upper third, and two spacer holes 40 in the lower third.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)

Description

Die vorliegende Erfindung betrifft eine Backofentür gemäß dem Oberbegriff des Patentanspruchs 1, sowie einen Backofen mit einer derartigen Backofentür.The present invention relates to a oven door according to the preamble of claim 1, as well as an oven with such a oven door.

Eine derartige Backofentür ist aus der DE 10 2006 042 174 A1 bekannt, wobei diese zum Verschließen der Beschickungsöffnung des Garraums eines insbesondere pyrolytisch selbstreinigenden Backofens dient. Die Backofentür ist mit einer frontseitigen und einer garraumseitigen Scheibe vorzugsweise aus Glasmaterial ausgestattet. Die Scheiben begrenzen einen Zwischenraum, in dem sich eine aus Wärme gut leitendem Material bestehende Wärmeleitplatte mit geringem Abstand vor der frontseitigen Scheibe befindet. Dabei besitzt die Wärmeleitplatte mehrere kleinflächige, vorzugsweise punktförmige Ausprägungen, mit denen sie sich auf der frontseitigen Scheibe abstützt und welche einen definierten Abstand zwischen Scheibe und Wärmeleitplatte bestimmen.Such a oven door is from the DE 10 2006 042 174 A1 this is known, which serves to close the feed opening of the cooking chamber of a particular pyrolytically self-cleaning oven. The oven door is equipped with a front and a garraumseitigen disc preferably made of glass material. The discs define a gap in which there is a good heat conducting material existing Wärmeleitplatte with a small distance in front of the front pane. In this case, the heat-conducting plate has a plurality of small-area, preferably punctiform forms, with which it is supported on the front pane and which define a defined distance between the pane and the heat conducting plate.

Ferner offenbart die DE 10 2008 042 470 A1 einen Backofen insbesondere mit einer Einrichtung zur pyrolytischen Selbstreinigung. Weiterhin offenbart die US 5,562,090 eine Ofentür mit einer Kühlungsvorrichtung. Schließlich offenbart die DE 77 06 648 U1 ein durchsichtiges Wärmeschutzelement für Bratöfen und Wärmekammern. Weiterer relevanter Stand der Technik ist aus US 3893442 A und FR 2906875 A1 benannt.Further, the DE 10 2008 042 470 A1 an oven, in particular with a device for pyrolytic self-cleaning. Furthermore, the disclosure US 5,562,090 an oven door with a cooling device. Finally, the reveals DE 77 06 648 U1 a transparent heat protection element for roasting ovens and heating chambers. Further relevant prior art is out US 3893442 A and FR 2906875 A1 named.

Der Erfindung liegt die Aufgabe zugrunde, den genannten Stand der Technik in seiner Funktion zu verbessern.The invention has for its object to improve the said prior art in its function.

Diese Aufgabe wird durch eine Backofentür mit den Merkmalen des Patentanspruchs 1, sowie durch einen Backofen mit einer derartigen Backofentür gemäß Patentanspruch 11 gelöst.This object is achieved by a oven door with the features of claim 1, as well as by a baking oven with such a oven door according to claim 11.

Gemäß dem kennzeichnenden Teil des Patentanspruchs 1 weist die Wärmeleitplatte ein Leitelement auf, das einen vertikal nach oben gerichteten Luftstrom in Richtung der garraumseitigen Scheibe ablenkt. Dadurch wird ein üblicherweise heißer, durch den Zwischenraum strömender Luftstrom vom oberen Ende der frontseitigen Scheibe ferngehalten. Zudem kann dadurch auch ein Wärmestau im oberen Bereich der frontseitigen Scheibe vermieden werden. Als Folge stellt sich im oberen Bereich der frontseitigen Scheibe an einer einem Benutzer der Backofentür zugewandten Oberfläche eine geringere Berührtemperatur ein. Der Abstand zwischen der frontseitigen Scheibe und der Wärmeleitplatte beträgt dabei bevorzugt zwischen einem und 15 Millimeter, besonders bevorzugt zwischen zwei und acht Millimeter. Die Wärmeleitplatte besteht insbesondere aus einem gut wärmeleitenden Material, wobei damit besser wärmeleitend als Glas zu verstehen ist.According to the characterizing part of patent claim 1, the heat conducting plate on a guide element which deflects a vertically upward air flow in the direction of the garraumseitigen disc. As a result, a normally hot air stream flowing through the intermediate space is kept away from the upper end of the front pane. In addition, this can also heat accumulation in the upper region of the front pane are avoided. As a result, in the upper area of the front Washer on a user facing the oven door surface a lower contact temperature. The distance between the front pane and the heat conducting plate is preferably between one and 15 millimeters, more preferably between two and eight millimeters. The heat-conducting plate consists in particular of a good heat-conducting material, which is better to understand heat than glass.

Zusätzlich ist die Wärmeleitplatte derart ausgebildet, dass sie eine aus Richtung der garraumseitigen Scheibe auftreffende Wärmestrahlung reflektiert, so dass dadurch ebenfalls die Oberflächentemperatur der frontseitigen Scheibe gesenkt werden kann. Insbesondere wenn die Wärmeleitplatte aus einem metallischen Werkstoff (wie z. B. Aluminium oder Edelstahl) gebildet ist, der eine spiegelnde Oberfläche aufweist, ergeben sich günstige Reflexionseigenschaften.In addition, the heat conduction plate is formed such that it reflects an incident from the direction of the garraumseitigen disc heat radiation, so that thereby also the surface temperature of the front pane can be lowered. In particular, when the heat conduction plate is formed of a metallic material (such as aluminum or stainless steel) having a specular surface, favorable reflection characteristics result.

Abhängig von den strömungstechnischen Gegebenheiten in der Backofentür kann es vorteilhaft sein, wenn ein oberer Endabschnitt der Tür eine Luftführung aufweist, die ein Hinterlüften der Wärmeleitplatte in einem Bereich zwischen dieser und der frontseitigen Scheibe ermöglicht. Dadurch bildet sich zum vertikal nach oben gerichteten Luftstrom ein paralleler Nebenluftstrom aus. Im Bereich des Leitelements vergrößert sich dabei der Abstand zwischen frontseitiger Scheibe und Wärmeleitplatte. Es ergibt sich dadurch eine Querschnittsvergrößerung für den zwischen frontseitiger Scheibe und Wärmeleitblech verlaufenden Nebenluftstrom, wodurch dieser beschleunigt und in Folge eine bessere Kühlwirkung der frontseitigen Scheibe erzielt wird.Depending on the fluidic conditions in the oven door, it may be advantageous if an upper end portion of the door has an air guide, which allows a rear ventilation of the heat conduction in a region between this and the front pane. As a result, a parallel secondary air flow is formed to the vertically upward air flow. In the area of the guide element, the distance between the front-side pane and the heat-conducting plate increases. This results in a cross-sectional enlargement for the front side disc and heat conducting plate extending secondary air flow, which accelerates this and consequently a better cooling effect of the front pane is achieved.

Des Weiteren ist das Leitelement an einem oberen Endabschnitt der Wärmeleitplatte angeordnet und/oder ausgebildet. Dabei ist das Leitelement insbesondere durch Umformung der Wärmeleitplatte erzeugt. Durch eine derartige Ausbildung ergibt sich zum einen ein preisgünstiger Herstellungsprozess. Zum anderen ergibt sich dadurch die Möglichkeit, den zur Kühlung der frontseitigen Scheibe notwendigen Luftstrom bis kurz vor dem oberen Ende der garraumseitigen Scheibe in einer vertikalen Richtung zu führen, bevor er dann in Richtung der garraumseitigen Scheibe abgelenkt wird. Dies bewirkt eine effiziente Kühlung der frontseitigen Scheibe und verhindert zudem einen Wärmestau im oberen Endbereich.Furthermore, the guide element is arranged and / or formed on an upper end portion of the heat conducting plate. In this case, the guide element is produced in particular by deformation of the heat conducting plate. Such a design results, on the one hand, in a cost-effective production process. On the other hand, this gives rise to the possibility of guiding the air flow necessary for cooling the front pane to a short distance in front of the upper end of the garraumseitigen disc in a vertical direction, before it is then deflected in the direction of the garraumseitigen disc. This causes efficient cooling of the front pane and also prevents heat accumulation in the upper end.

Indem das Leitelement über seine gesamte Breite eine Biegung mit einem Radius von mindestens 5 mm aufweist, wird eine sanfte Luftumlenkung mit geringen Verwirbelungen erreicht. Besonders bevorzugt weist der Radius einen Wert < = 10 mm auf, wodurch die Luftführung abermals verbessert wird.By having a baffle with a radius of at least 5 mm across its entire width, a gentle air deflection with low turbulence is achieved. Particularly preferably, the radius has a value <= 10 mm, whereby the air flow is improved again.

Vorzugsweise erstreckt sich das Leitelement lediglich über einen Teil einer Breite von mindestens 50 %, insbesondere von mindestens 80 % der Wärmeleitplatte. Durch eine derartige Ausbildung wird Bauraum für Zusatzelemente geschaffen, ohne dabei auf die Eigenschaften der unterhalb angeordneten Wärmeleitplatte, wie z. B. gleichmäßige Wärmeverteilung oder Wärmereflexion zu verzichten. So kann beispielsweise bei einer oberhalb des Leitelements angeordneten Blende diese in einem Randbereich eine Vertiefung aufweisen, in die ein Verriegelungselement für die Backofentür eingreifen kann. Bevorzugt ist es, wenn die Richtung eines abgelenkten Luftstroms bezüglich einer Scheibenebene einen Winkel von 10° bis 90°, insbesondere von 45° bis 80°aufweist. Dabei ist unter der Scheibenebene eine Ebene zu verstehen, innerhalb derer die der garraumseitigen Scheibe zugewandte, im wesentlichen plane, bei geschlossener Backofentür vertikal angeordnete Außenfläche der frontseitigen Scheibe liegt. Der Winkel des abgelenkten Luftstroms ergibt sich zwischen dieser Ebene und der Richtung des abgelenkten Luftstroms. Im Wesentlichen entspricht dabei die Richtung des abgelenkten Luftstroms einer, an das Ende des Leitelements angelegten Tangente.Preferably, the guide element extends only over a part of a width of at least 50%, in particular of at least 80% of the heat conducting plate. Such a design space for additional elements is created, without sacrificing the properties of the below arranged heat conducting plate, such. B. to dispense even heat distribution or heat reflection. Thus, for example, in the case of an aperture arranged above the guide element, the latter can have a depression in an edge region into which a locking element for the oven door can engage. It is preferred if the direction of a deflected air flow with respect to a disc plane at an angle of 10 ° to 90 °, in particular from 45 ° to 80 °. It is to be understood by the plane of the disc a plane within which the garraumseitigen disc facing, substantially planar, with the oven door closed vertically arranged outer surface of the front disc is located. The angle of the deflected air flow is between this plane and the direction of the deflected airflow. Essentially, the direction of the deflected air flow corresponds to a tangent applied to the end of the guide element.

In einer bevorzugten Weiterbildung ist ein oberer Endabschnitt der Tür durch eine Blende abgedeckt, die den abgelenkten Luftstrom weiterleitet. Der abgelenkte Luftstrom wird beispielsweise zu einem Kühlluftstrom eines Backofens geleitet, der oberhalb der Tür vorbeiführt und ins Freie mündet. Dabei wird der abgelenkte Luftstrom vom Kühlluftstrom angesaugt (Venturi- Effekt) und mit ins Freie befördert.In a preferred embodiment, an upper end portion of the door is covered by a diaphragm, which forwards the deflected air flow. The deflected air flow is directed, for example, to a cooling air flow of a baking oven, which passes above the door and opens into the open air. The deflected air flow is sucked in by the cooling air flow (Venturi effect) and transported outside.

In einer weiteren Ausgestaltung wird vorgeschlagen, dass die Wärmeleitplatte eine Anlage aufweist, an der sich die Blende abstützt. Dadurch ist die Blende in der Backofentür zumindestens in einer Richtung positioniert. Es ergeben sich dadurch insbesondere dann Vorteile, wenn die Blende nur randseitig an der Backofentür befestigt ist, mittig jedoch keine Unterstützung aufweist. Insbesondere erstreckt sich die Anlage über mindestens 80 % der Breite der Wärmeleitplatte, wodurch ein gleichmäßiger Abstand bzw. Spalt zwischen der frontseitigen Scheibe und der Blende ermöglicht wird. Ist die Blende beispielsweise an einem linksseitigen und einem rechtsseitigen Ende der Backofentür über Profilleisten an dieser gehaltert, so ist eine mittige Abstützung der Blende durch die Anlage besonders vorteilhaft. Dadurch wird bei einer Druckbelastung von oben ein Durchbiegen der Blende unterbunden.In a further embodiment, it is proposed that the heat-conducting plate has a system on which the diaphragm is supported. As a result, the panel is positioned in the oven door at least in one direction. This results in particular advantages if the panel is only attached to the edge of the oven door, but centrally has no support. In particular, the system extends over at least 80% of the width of the heat conducting plate, whereby a uniform gap between the front disc and the diaphragm is made possible. If the panel is supported, for example on a left-side and a right-side end of the oven door profile strips on this, a central support of the panel by the system is particularly advantageous. As a result, a deflection of the diaphragm is prevented at a pressure load from above.

In einer alternativen Ausgestaltung ist die Wärmeleitplatte als Teil einer Blende ausgebildet, die einen oberen Endabschnitt der Tür abdeckt. Eine derartige Ausbildung ermöglicht eine kostengünstige Herstellbarkeit eines Teils, das zwei Funktionalitäten erfüllt. Zum einen wird ein oberer Endabschnitt der Tür durch die Blende abgedeckt und zum anderen bewirkt die Wärmeleitplatte eine Reduzierung der Fronttemperaturen der frontseitigen Scheibe. Durch die gemeinsame Ausbildung in einem Teil ist dieses strömungstechnisch besonders günstig herstellbar, da keine stufigen Übergänge bzw. Fügespalte vorhanden sind. Dabei ist die Ausbildung als Hybridteil vorteilhaft, bei dem die Wärmeleitplatte aus Metall und die Blende aus Kunststoff besteht. In diesem Fall dient die Wärmeleitplatte als Einlegeteil in ein Kunststoffwerkzeug.In an alternative embodiment, the heat conducting plate is formed as part of a panel which covers an upper end portion of the door. Such a design allows cost-effective manufacturability of a part that fulfills two functionalities. On the one hand, an upper end portion of the door is covered by the diaphragm and, on the other hand, the heat-conducting plate causes a reduction in the front temperatures of the front pane. Due to the joint training in one part of this fluidically is particularly inexpensive to produce, since no stage transitions or joining gaps are present. The training as a hybrid part is advantageous in which the heat conducting plate made of metal and the diaphragm is made of plastic. In this case, the heat-conducting plate serves as an insert in a plastic tool.

Eine bevorzugte Weiterbildung besteht darin, dass ein an der frontseitigen Scheibe angeordneter Türgriff Befestigungselemente aufweist, durch die der Türgriff mit der frontseitigen Scheibe verbunden ist und welche Befestigungselemente zugleich die Wärmeleitplatte beabstandet zur frontseitigen Scheibe haltern. Durch die Befestigung der Wärmeleitplatte mit den Befestigungselementen des Türgriffs können Teilekosten und Montagekosten eingespart werden. Durch ein Distanzelement kann der Abstand der Wärmeleitplatte zur frontseitigen Scheibe im Bereich der Befestigungselemente festgelegt werden. Dabei ist es vorteilhaft, eine bereits bestehende Schutzhülse für die Lochleibung der frontseitigen Scheibe (evtl. in einer leicht modifizierten Version) zugleich als Abstandselement zu verwenden.A preferred development consists in that a door handle arranged on the front pane has fastening elements by which the door handle is connected to the front pane and which fastening elements at the same time support the heat conduction plate at a distance from the front pane. By attaching the heat conducting plate with the fasteners of the door handle parts costs and installation costs can be saved. By a spacer element, the distance of the heat conducting plate can be set to the front pane in the fasteners. It is advantageous to use an existing protective sleeve for the bearing hole of the front pane (possibly in a slightly modified version) at the same time as a spacer element.

Weist die Wärmeleitplatte zumindest ein Abstandselement aus einem Kunststoffmaterial auf, so ist zumindest in einem Teilbereich der Wärmeleitplatte der Abstand zur frontseitigen Scheibe festlegt. Insbesondere beim Einsatz mehrerer derartiger Abstandselemente ist über die Fläche der Wärmeleitplatte ein gleichmäßiger Abstand derselben zur frontseitigen Scheibe gegeben. Bei einer Ausbildung des zumindest einen Abstandselementes aus Elastomer ist auch bei Auftreten von Erschütterungen eine klapperfreie Befestigung der Wärmeleitplatte in der Backofentür gegeben. Das Abstandselement weist bevorzugt ein Befestigungselement auf, durch welches das Abstandselement werkzeuglos in der Wärmeleitplatte, beispielsweise durch einen Steckvorgang, befestigbar ist. Alternativ ist in einer besonders preisgünstigen Ausgestaltung das Abstandselement durch eine Prägung in der Wärmeleitplatte gebildet, wobei sich dabei das Isolationsverhalten gegenüber der frontseitigen Scheibe, sowie die Klapperneigung etwas verschlechtern.If the heat-conducting plate has at least one spacer made of a plastic material, then the distance to the front-side pane is determined at least in a partial area of the heat-conducting plate. In particular, when using a plurality of such spacers is given over the surface of the heat conducting a uniform distance of the same to the front pane. In an embodiment of the at least one spacer element made of elastomer, a rattle-free fastening of the heat-conducting plate in the oven door is provided even when vibrations occur. The spacer element preferably has a fastening element, by means of which the spacer element can be fastened without tools in the heat-conducting plate, for example by a plug-in operation. Alternatively, in a particularly inexpensive embodiment, the spacer element is formed by an embossing in the heat conducting plate, wherein thereby the insulation behavior relative to the front pane, as well as the Klapperteigung worsen something.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels und der Bezugnahme auf die beigefügten Figuren. Es zeigen:

Fig. 1
eine Seitenansicht einer Backofentür in einer Schnittdarstellung, wobei der Schnittverlauf einer Mittellinie der Tür entspricht;
Fig. 2
eine Detailansicht eines oberen Türbereichs aus Fig. 1 und
Fig. 3
die Wärmeleitplatte in einer bezüglich der Backofentür rückwärtigen Ansicht.
Further features and advantages of the invention will become apparent from the following description of an embodiment and the reference to the accompanying figures. Show it:
Fig. 1
a side view of a oven door in a sectional view, wherein the sectional profile corresponds to a center line of the door;
Fig. 2
a detailed view of an upper door area Fig. 1 and
Fig. 3
the Wärmeleitplatte in a respect to the oven door rear view.

Fig. 1 zeigt eine Backofentür mit einer frontseitigen Scheibe 2, an der ein Türgriff 4 befestigt ist. Zwischen der frontseitigen Scheibe 2 und der garraumseitigen Scheibe 6 ergibt sich ein Zwischenraum 7. Die garraumseitige Scheibe 6 weist eine bauchige Kontur auf, wodurch aufgrund des zusätzlich eingeschlossenen Luftpolsters eine bessere Isolation und damit verbunden niedrigere Berührtemperaturen für einen Benutzer an der frontseitigen Scheibe 2 auftreten. Im Zwischenraum 7 sind zusätzlich eine vordere Zwischenscheibe 8a, sowie eine hintere Zwischenscheibe 8b angeordnet. Im Zwischenraum 7 ist ferner zwischen der frontseitigen Scheibe 2 und der vorderen Zwischenscheibe 8a eine Wärmeleitplatte 10 angeordnet, dessen oberer Endabschnitt ein Leitelement 12 aufweist. Die Wärmeleitplatte 10 ist dabei aus einem dünnen Edelstahlblech ausgebildet. An einem unteren Endabschnitt der Backofentür sind Scharniere 14 befestigt, durch die die Backofentür in einem Backofen (nicht gezeigt) verschwenkbar gelagert ist. Fig. 1 shows a oven door with a front pane 2, to which a door handle 4 is attached. The space-side pane 6 has a bulbous contour, which due to the additionally enclosed air cushion better insulation and associated lower contact temperatures for a user on the front panel 2 occur. In the intermediate space 7, a front intermediate disc 8a, and a rear intermediate disc 8b are additionally arranged. In the intermediate space 7, a heat-conducting plate 10 is further arranged between the front-side disc 2 and the front intermediate disc 8a, whose upper end portion has a guide element 12. The heat-conducting plate 10 is formed from a thin stainless steel sheet. At a lower end portion of the oven door hinges 14 are fixed, through which the oven door in an oven (not shown) is pivotally mounted.

Die Detailansicht in Fig. 2 zeigt den Türgriff 4, der über eine Befestigungsschraube 16 und ein Distanzelement 18 an der frontseitigen Scheibe 2 befestigt ist. Die Wärmeleitplatte 10 ist im oberen Endabschnitt ebenfalls durch die Befestigungsschraube 16 gehalten, wobei das Distanzelement 18 den Abstand A zur frontseitigen Scheibe 2 festlegt. Das Distanzelement 18 ist aus Elastomer gebildet. Die Griffstange 20 des Türgriffs 4 ist durch einen Griffbock 22 beabstandet zur frontseitigen Scheibe 2 gehalten. Zwei Abstandselemente 24 sind jeweils mittels eines Befestigungselementes 26 an einem unteren Endabschnitt der Wärmeleitplatte 10 gehalten. Dabei weist das Befestigungselement 26 eine im Wesentlichen pilzförmige Kontur auf, die durch ein Abstandselementloch 40 ( Fig. 3 ) in die Wärmeleitplatte 10 gesteckt wird und dort selbsttätig verrastet. Durch die Dicke des Abstandselements 24 wird der Abstand der Wärmeleitplatte 10 zur frontseitigen Scheibe festgelegt. Bevorzugt weisen das Distanzelement 18 und das Abstandselement 24 im Einbauzustand die gleiche Dicke auf. Dadurch ist ein gleichmäßiger Abstand A zwischen Wärmeleitplatte 10 und frontseitiger Scheibe 2 gegeben. Die Wärmeleitplatte 10 weist ferner eine Versteifungsprägung 28 auf, die einen Verzug der Wärmeleitplatte 10 unter Temperatureinfluss verhindert. Am unteren Ende der Wärmeleitplatte 10 weist diese eine Biegung 30 auf, die sich in Richtung der frontseitigen Scheibe 2 erstreckt. Die Biegung 30 verhindert im Wesentlichen eine Luftzirkulation zwischen der Wärmeleitplatte 10 und der frontseitigen Scheibe 2, wodurch sich ein stehendes Luftpolster ausbildet, dessen Isolierwirkung die Berührtemperaturen an der frontseitigen Scheibe 2 reduziert. Je nach strömungstechnischer Gegebenheiten im Türaufbau kann eine alternative Ausführung (nicht gezeigt) vorteilhaft sein, die keine Biegung 30 aufweist. Dadurch wird der Bereich zwischen Wärmeleitplatte 10 und frontseitiger Scheibe 2 gezielt durchlüftet und als Folge die Berührtemperatur der frontseitigen Scheibe gesenkt. Im Bereich zwischen der frontseitigen Scheibe 2 und der vorderen Zwischenscheibe 8a bildet sich ein Luftstrom V aus, der von einem unteren Endabschnitt der Tür im Wesentlichen vertikal nach oben verläuft. Dieser Luftstrom V streicht an einer der frontseitigen Scheibe 2 abgewandten Fläche der Wärmeleitplatte 10 vorbei und wird in einem oberen Bereich der Wärmeleitplatte 10 durch das Leitelement 12 abgelenkt, bevor er den Türbereich verlässt. Der Luftstrom V wird dabei durch das Leitelement 12 in Richtung der garraumseitigen Scheibe 6 in einen Luftstrom V' abgelenkt. Ein Winkel α zwischen einer Ebene E der frontseitigen Scheibe 2 und dem Luftstrom V' bzw. einer an den oberen Endabschnitt des Leitelements angelegten Tangente weist dabei einen Wert von 80° auf. An einem oberen Endabschnitt 32 der Backofentür ist eine Blende 34 angeordnet, die einerseits als Sichtschutz für das Türinnenleben dient und andererseits den Luftstrom V' durch Blendenöffnungen 35 in Richtung eines Kühlluftstroms H lenkt. Der Kühlluftstrom H dient zur Kühlung eines Schalterraums des Backofens, sowie zur Abführung des Wrasens des Backofens (nicht gezeigt). Der Kühlluftstrom H streicht oberhalb der Backofentür vorbei und nimmt durch den Venturi-Effekt den Luftstrom V' mit nach außen, wobei der Luftstrom V' entsprechend einem Luftstrom V" abgelenkt wird. Der Übergang von der Wärmeleitplatte 10 zum Leitelement 12 erfolgt durch eine Biegung mit dem Radius R. Nach dem Radius R weist das Leitelement noch ein gerades Teilstück auf, das tangential an den Radius angebunden ist. Das Ende dieses geraden Teilstücks bildet die Anlage 36, an der sich die Blende 34 abstützt. Zwischen Leitelement 12, frontseitiger Scheibe 2 und Blende 34 bildet sich ein Hohlraum B, dessen isolierendes Luftpolster niedrigere Berührtemperaturen am oberen Endabschnitt 32 der Backofentür bewirkt.The detail view in Fig. 2 shows the door handle 4, which is fastened via a fastening screw 16 and a spacer element 18 on the front pane 2. The heat-conducting plate 10 is also held in the upper end portion by the fastening screw 16, wherein the spacer element 18 determines the distance A to the front pane 2. The spacer 18 is formed of elastomer. The handle bar 20 of the door handle 4 is held by a handle bracket 22 spaced from the front pane 2. Two spacer elements 24 are each held by means of a fastening element 26 at a lower end portion of the heat conducting plate 10. In this case, the fastening element 26 has a in Substantially mushroom-shaped contour passing through a spacer hole 40 ( FIG. Fig. 3 ) is inserted into the heat-conducting plate 10 and locked there automatically. Due to the thickness of the spacer 24, the distance of the heat conducting plate 10 is fixed to the front pane. Preferably, the spacer element 18 and the spacer element 24 in the installed state to the same thickness. As a result, a uniform distance A between the heat conducting plate 10 and the front pane 2 is given. The heat-conducting plate 10 also has a stiffening embossment 28, which prevents distortion of the heat-conducting plate 10 under the influence of temperature. At the lower end of the heat-conducting plate 10, this has a bend 30 which extends in the direction of the front pane 2. The bend 30 essentially prevents air circulation between the heat-conducting plate 10 and the front pane 2, whereby a standing air cushion is formed whose insulating effect reduces the contact temperatures at the front pane 2. Depending on the fluidic conditions in the door structure, an alternative embodiment (not shown) may be advantageous, which does not have a bend 30. As a result, the area between the heat-conducting plate 10 and the front pane 2 is ventilated in a targeted manner and as a result the contact temperature of the front pane is lowered. In the area between the front disc 2 and the front intermediate disc 8a, an air flow V is formed, which extends from a lower end portion of the door substantially vertically upward. This air stream V passes by a surface of the heat-conducting plate 10 facing away from the front pane 2 and is deflected in an upper region of the heat-conducting plate 10 by the guide element 12 before it leaves the door region. The air flow V is thereby deflected by the guide element 12 in the direction of the garraumseitigen disc 6 in an air flow V '. An angle α between a plane E of the front pane 2 and the air flow V 'or a tangent applied to the upper end section of the guide element has a value of 80 °. At an upper end portion 32 of the oven door, a diaphragm 34 is arranged, which serves as a visual screen for the inner door life and on the other hand, the air flow V 'through orifices 35 in the direction of a cooling air flow H. The cooling air flow H is used for cooling a switch room of the oven, as well as for removing the Wrasens the oven (not shown). The cooling air flow H passes above the oven door and takes by the Venturi effect with the air flow V 'to the outside, wherein the air flow V' is deflected according to an air flow V "The transition from the heat conducting plate 10 to the guide element 12 is effected by a bend with the radius R. After the radius R, the guide element still has a straight section tangentially connected to the radius This straight section forms the system 36, at which the aperture 34 is supported. Between the guide element 12, front disc 2 and aperture 34 forms a cavity B, the insulating air cushion causes lower contact temperatures at the upper end portion 32 of the oven door.

Fig. 3 zeigt die Wärmeleitplatte 10 in einer von der garraumseitigen Scheibe 6 ausgehenden Blickrichtung, die eine Breite Bw aufweist und an dessen oberen Endabschnitt das Leitelement 12 angeordnet ist. Dabei ist die Breite BI des Leitelemtnts 12 schmäler als die Breite Bw der Wärmeleitplatte 10. Eine obere Kante des Leitelements bildet die Anlage 36, die sich über die gesamte Breite BI erstreckt. Die Wärmeleitplatte 10 weist zudem in einem oberen Drittel zwei Griffbefestigungslöcher 38, sowie im unteren Drittel zwei Abstandselementelöcher 40 auf. Bezugszeichenliste 2 frontseitige Scheibe 40 Abstandselementloch 4 Türgriff A Abstand 6 garraumseitige Scheibe α Winkel 7 Zwischenraum B Hohlraum 8a vordere Zwischenscheibe E Ebene 8b hintere Zwischenscheibe H Kühlluftstrom 10 Wärmeleitplatte R Radius 12 Leitelement V Luftstrom 14 Scharnier BI Breite Leitelement 16 Befestigungsschraube Bw Breite Wärmeleitplatte 18 Distanzelement 20 Griffstange 22 Griffbock 24 Abstandselement 26 Befestigungselement 28 Versteifungsprägung 30 Biegung 32 oberer Endabschnitt 34 Blende 35 Blendenöffnung 36 Anlage 38 Griffbefestigungsloch Fig. 3 shows the heat conducting plate 10 in an outgoing from the garraumseitigen disc 6 viewing direction, which has a width Bw and at the upper end portion of the guide element 12 is arranged. In this case, the width BI of Leitelemtnts 12 is narrower than the width Bw of the heat conducting plate 10. An upper edge of the guide element forms the system 36, which extends over the entire width BI. The heat-conducting plate 10 also has two handle fastening holes 38 in an upper third, and two spacer holes 40 in the lower third. <B> LIST OF REFERENCES </ b> 2 front pane 40 Spacer hole 4 door handle A distance 6 garraumseitige disc α angle 7 gap B cavity 8a front washer e level 8b rear washer H Cooling air flow 10 heat conduction R radius 12 vane V airflow 14 hinge BI Wide guide element 16 fixing screw bw Wide heat conduction plate 18 spacer 20 Grab bars 22 handle Bock 24 spacer 26 fastener 28 stiffening embossment 30 bend 32 upper end section 34 cover 35 aperture 36 investment 38 Handle mounting hole

Claims (11)

  1. Oven door with a front-side panel and a cooking-compartment-side panel (2, 6), preferably made of glass material, said panels (2, 6) delimiting an intermediate space (7), characterised in that in the intermediate space (7) at least one heat-conducting plate (10) is located at a distance (A) from the front-side panel (2), wherein additionally arranged in the intermediate space (7) are a front intermediate panel (8a) and a rear intermediate panel (8b), wherein the heat-conducting plate (10) is arranged between the front-side panel (2) and the front intermediate panel (8a), wherein the intermediate space (7) is formed in a region between the front-side panel (2) and the front intermediate panel (8a), wherein the heat-conducting plate (10) is designed such that it reflects thermal radiation coming from the direction of the cooking-compartment-side panel (6), wherein the heat-conducting plate (10) has a conductive element (12) which deflects a vertically upwardly directed flow of air (V) in the direction of the cooking-compartment-side panel (6), and wherein the conductive element (12) is arranged at an upper end section of the heat-conducting plate (10).
  2. Oven door according to claim 1, characterised in that the conductive element (12) is created by press moulding of the heat-conducting plate (10).
  3. Oven door according to one of the preceding claims 1 or 2, characterised in that the conductive element (12) has a bend with a radius (R) of at least 5 mm over its entire width (BL).
  4. Oven door according to one of the preceding claims 1 to 3, characterised in that the conductive element (12) extends only over a part of a width (BW) of at least 50%, in particular at least 80% of the heat-conducting plate (10).
  5. Oven door according to one of the preceding claims, characterised in that the direction of the deflected air flow (V') in relation to a panel plane (E) encloses an angle (α) of 10° to 90°, in particular an angle (α) of 45° to 80°.
  6. Oven door according to one of the preceding claims, characterised in that an upper end section (32) of the oven door is covered by a plate (34), which forwards the deflected air flow V'.
  7. Oven door according to claim 6, characterised in that the heat-conducting plate (10) has an abutment (36) on which the plate (34) is supported, as a result of which the plate (34) is positioned in the oven door in at least one direction.
  8. Oven door according to one of the preceding claims 1 to 6, characterised in that the heat-conducting plate (10) is formed as part of a plate (34) which covers an upper end section (32) of the door.
  9. Oven door according to one of the preceding claims, characterised in that a door handle (4) arranged on the front-side panel (2) has fastening elements (16, 18) by which the door handle (4) is connected to the front-side panel (2), said fastening elements (16, 18) at the same time mounting the heat-conducting plate (10) at a distance from the front-side panel (2).
  10. Oven door according to one of the preceding claims, characterised in that the heat-conducting plate (10) has at least one spacer element (24) made of a plastic material, in particular an elastomer, which at least in a partial region of the heat-conducting plate (10) defines the distance (A) from the front-side panel (2).
  11. Oven with an oven door for closing the loading aperture of the cooking compartment of an in particular pyrolytic self-cleaning oven, according to one of the preceding claims.
EP11194280.1A 2010-12-22 2011-12-19 Oven door and oven with a door Active EP2469180B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11194280T PL2469180T3 (en) 2010-12-22 2011-12-19 Oven door and oven with a door

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010063906A DE102010063906A1 (en) 2010-12-22 2010-12-22 Oven door and oven with a oven door

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EP2469180A1 EP2469180A1 (en) 2012-06-27
EP2469180B1 true EP2469180B1 (en) 2016-12-14

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DE (1) DE102010063906A1 (en)
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012213126B4 (en) 2012-07-26 2022-11-10 BSH Hausgeräte GmbH Door for a household appliance with a latching element and a prestressing element, and an oven with such a door
DE102012218004A1 (en) * 2012-10-02 2014-04-03 BSH Bosch und Siemens Hausgeräte GmbH Air guide for cooking appliance, particularly for electric cooker for cooling and removing fumes, comprises metal piece and plastic piece, which are integrally formed with each other, where plastic piece is formed for receiving fan wheel
DE102014216548A1 (en) * 2014-03-19 2015-09-24 BSH Hausgeräte GmbH Door for a household appliance and designed as a hybrid component cover for at least one door glass and household appliance with such a door
USD1005769S1 (en) 2021-09-08 2023-11-28 Newage Products Inc. Oven

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Publication number Priority date Publication date Assignee Title
US3893442A (en) * 1974-10-03 1975-07-08 Gen Electric Oven door with air cooling system
DE7706648U1 (en) * 1977-03-04 1977-06-16 Tds Technische Dichtungssysteme Gmbh, 6000 Frankfurt CLEAR THERMAL PROTECTION ELEMENT FOR OVENS, HEATING CHAMBERS AND THE LIKE
IT8819599A0 (en) * 1988-03-01 1988-03-01 Ocean Spa KITCHEN OVEN FOR COOKING FOOD, OF THE BUILT-IN TYPE IN MODULAR KITCHEN CABINETS.
US5562090A (en) * 1993-07-22 1996-10-08 General Electric Company Oven door having a cooling arrangement
DE10047016B4 (en) * 2000-09-22 2005-02-10 AEG Hausgeräte GmbH Cooking oven
DE102006042174A1 (en) 2006-09-08 2008-03-27 BSH Bosch und Siemens Hausgeräte GmbH oven door
DE102006042173B4 (en) * 2006-09-08 2021-01-14 BSH Hausgeräte GmbH Oven, in particular with a device for pyrolytic self-cleaning
FR2906875B1 (en) * 2006-10-05 2008-12-05 Brandt Ind Sas COOKING OVEN COMPRISING A COOLING CHANNEL OF A DOOR HANDLE.
DE102008042470A1 (en) * 2008-09-30 2010-04-01 BSH Bosch und Siemens Hausgeräte GmbH Baking oven has device for pyrolytic self-cleaning, where cooking chamber of device is closed by oven door, and oven door holds perpendicular flowing channel between front panel and inner or intermediate disk

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Title
None *

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DE102010063906A1 (en) 2012-06-28
PL2469180T3 (en) 2017-06-30

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