EP0709624A1 - Baking and roasting oven muffle with a heat insulating coating - Google Patents

Baking and roasting oven muffle with a heat insulating coating Download PDF

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Publication number
EP0709624A1
EP0709624A1 EP95116031A EP95116031A EP0709624A1 EP 0709624 A1 EP0709624 A1 EP 0709624A1 EP 95116031 A EP95116031 A EP 95116031A EP 95116031 A EP95116031 A EP 95116031A EP 0709624 A1 EP0709624 A1 EP 0709624A1
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EP
European Patent Office
Prior art keywords
baking
roasting oven
oven muffle
aluminum foil
muffle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95116031A
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German (de)
French (fr)
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EP0709624B1 (en
Inventor
Horst Dipl.-Ing. Schönweiss
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AEG Hausgeraete GmbH
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AEG Hausgeraete GmbH
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Publication date
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Application filed by AEG Hausgeraete GmbH filed Critical AEG Hausgeraete GmbH
Publication of EP0709624A1 publication Critical patent/EP0709624A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/34—Elements and arrangements for heat storage or insulation

Definitions

  • the invention relates to a baking and roasting oven muffle according to the preamble of claim 1.
  • Mineral baked mats (glass or rock wool) are usually used for thermal insulation in oven baking and roasting muffles. Since organic binders are necessary for the production of such fiber mats, there is the disadvantage that when the baking and roasting oven muffle is first heated, these binders release gases containing formaldehyde in the fiber mat. If the stove installation room is not adequately ventilated, this can result in a possible health hazard for the people in the installation room.
  • the object of the invention is therefore to provide thermal insulation for baking and roasting oven muffles, which no longer represents a harmful source of danger, is easy to assemble and disassemble and can also be easily disposed of by material or recycled.
  • the proposed muffle insulation contains no mineral fibers and organic binders and is characterized u. a. with good thermal insulation properties, can be easily recycled or recycled and does not release any dust particles during assembly.
  • the drawing shows a heat-insulated baking and roasting oven muffle in section.
  • the electrically heated baking and roasting oven muffle 1 which can be part of a stove or a household baking oven, not shown, has as an upper heat an internal heating element 3 arranged near the muffle cover 2 (tubular casing heating element). For the bottom heat, the relevant radiator 4 is pressed onto the muffle base 5 from the outside.
  • the baking and roasting oven muffle 1 is provided with a heat-insulating covering 6, which is composed of two different thermal insulation materials which are not connected to one another.
  • the one thermal insulation material suitably consists of an aluminum foil, in particular aluminum stamping foil, which is expediently multilayered, approximately 3 to 6 layers, placed or wrapped around the outer wall of the furnace muffle 1 and thus enveloping its outer surface in the form of an aluminum foil package 7.
  • the other thermal insulation material is a foam mat 8, which completely covers or encloses the multilayer aluminum foil package 7 towards the outside.
  • the foam mat 8 has a high-temperature-resistant plastic as the base material and has a temperature resistance of approximately 300 o C on. Both thermal insulation materials overlap at their joint and are held in their winding position by tensioning straps, not shown, and pressed firmly against the outer muffle wall.
  • the foam mat 8 adjacent film layer has a temperature of about 150 to 250 o C a.
  • the less temperature-resistant foam mat 8 can therefore be used without hesitation at such a temperature.
  • a relatively low temperature level is set in the foam mat 8, at which the foam of the insulating mat, due to its low density, also develops its best thermal insulation properties.
  • the proposed combination of the two insulating materials achieves the insulating effect of the mineral fiber products used to date, but without to have their disadvantages with regard to the evaporation of gases harmful to health.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Insulation (AREA)
  • Cookers (AREA)

Abstract

The oven (1) is esp. designed for roasting and baking of various types of food. The structure of the oven incorporates several sheets of aluminium foil (7). The aluminium foils may be embossed so that adjacent layers are spaced apart to make insulating air spaces between them and they may be wound in three to six layers. The mat (8) can be resistant to temperatures of up to three hundred deg.C.

Description

Die Erfindung betrifft eine Back- und Bratofenmuffel nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a baking and roasting oven muffle according to the preamble of claim 1.

Bei Back- und Bratofenmuffeln von Herden werden zur thermischen Isolierung in der Regel Mineralfasermatten (Glas- oder Steinwolle) verwendet. Da zur Herstellung solcher Fasermatten organische Bindemittel notwendig sind, ergibt sich der Nachteil, daß beim erstmaligen Aufheizen der Back- und Bratofenmuffel diese Bindemittel in der Fasermatte formaldehydhaltige Gase freisetzen. Daraus kann sich bei nicht ausreichender Belüftung des Herd-Aufstellraumes eine mögliche gesundheitsschädliche Belastung der im Aufstellraum befindlichen Personen ergeben.Mineral baked mats (glass or rock wool) are usually used for thermal insulation in oven baking and roasting muffles. Since organic binders are necessary for the production of such fiber mats, there is the disadvantage that when the baking and roasting oven muffle is first heated, these binders release gases containing formaldehyde in the fiber mat. If the stove installation room is not adequately ventilated, this can result in a possible health hazard for the people in the installation room.

Aufgabe der Erfindung ist es deshalb, für Back- und Bratofenmuffeln eine Wärmeisolierung zu schaffen, die keinen gesundheitsschädlichen Gefahrenherd mehr darstellt, leicht montier- und demontierbar ist und ebenso leicht nach Material getrennt entsorgt bzw. einer Wiederverwertung zugeführt werden kann.The object of the invention is therefore to provide thermal insulation for baking and roasting oven muffles, which no longer represents a harmful source of danger, is easy to assemble and disassemble and can also be easily disposed of by material or recycled.

Die Lösung dieser Aufgabe gemäß der Erfindung ist dem kennzeichnenden Teil des Patentanspruchs 1 zu entnehmen. Vorteilhafte weitere Ausgestaltungen des Gegenstandes der Erfindung sind in den Unteransprüchen angegeben.The solution to this problem according to the invention can be found in the characterizing part of patent claim 1. Advantageous further developments of the subject matter of the invention are specified in the subclaims.

Die vorgeschlagene Muffelisolierung enthält keine Mineralfasern sowie organische Bindemittel und zeichnet sich u. a. durch gute Wärmedämmeigenschaften aus, kann mühelos recycelt bzw. einer Wiederverwertung zugeführt werden und setzt bei der Montage keinerlei Staubpartikel frei.The proposed muffle insulation contains no mineral fibers and organic binders and is characterized u. a. with good thermal insulation properties, can be easily recycled or recycled and does not release any dust particles during assembly.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird anhand dieser nachfolgend näher beschrieben.An embodiment of the invention is shown in the drawing and will be described in more detail below with reference to this.

Die Zeichnung zeigt eine wärmeisolierte Back- und Bratofenmuffel im Schnitt.The drawing shows a heat-insulated baking and roasting oven muffle in section.

Die elektrisch beheizte Back- und Bratofenmuffel 1, die Bestandteil eines nicht dargestellten Herdes oder eines Haushaltsbackofens sein kann, hat als Oberhitze einen innenliegenden, nahe der Muffeldecke 2 angeordneten Heizkörper 3 (Mantelrohrheizkörper). Für die Unterhitze ist der betreffende Heizkörper 4 von außen an den Muffelboden 5 angedrückt. Die Back- und Bratofenmuffel 1 ist mit einer wärmeisolierenden Umhüllung 6 versehen, die aus zwei unterschiedlichen Wärmedämmaterialien zusammengesetzt ist, die nicht miteinander verbunden sind. Das eine Wärmedämmaterial besteht zweckmäßig aus einer Aluminiumfolie, insbesondere Aluminiumprägefolie, die zweckmäßig mehrlagig, etwa 3- bis 6lagig, um die Außenwandung der Ofenmuffel 1 gelegt bzw. gewickelt ist und somit deren Mantelfläche in Form eines Aluminiumfolienpaketes 7 umhüllt. Das andere Wärmedämmaterial ist eine Schaumstoffmatte 8, die das mehrlagige Aluminiumfolienpaket 7 nach außen hin vollständig abdeckt bzw. umschließt. Die Schaumstoffmatte 8 hat als Grundstoff einen hochtemperaturbeständigen Kunststoff und weist eine Temperaturbeständigkeit von etwa 300 oC auf. Beide Wärmedämmaterialien überlappen sich an ihrer Stoßstelle und werden von nicht dargestellten Spannbändern in ihrer Wickellage gehalten und fest gegen die äußere Muffelwandung gepreßt.The electrically heated baking and roasting oven muffle 1, which can be part of a stove or a household baking oven, not shown, has as an upper heat an internal heating element 3 arranged near the muffle cover 2 (tubular casing heating element). For the bottom heat, the relevant radiator 4 is pressed onto the muffle base 5 from the outside. The baking and roasting oven muffle 1 is provided with a heat-insulating covering 6, which is composed of two different thermal insulation materials which are not connected to one another. The one thermal insulation material suitably consists of an aluminum foil, in particular aluminum stamping foil, which is expediently multilayered, approximately 3 to 6 layers, placed or wrapped around the outer wall of the furnace muffle 1 and thus enveloping its outer surface in the form of an aluminum foil package 7. The other thermal insulation material is a foam mat 8, which completely covers or encloses the multilayer aluminum foil package 7 towards the outside. The foam mat 8 has a high-temperature-resistant plastic as the base material and has a temperature resistance of approximately 300 o C on. Both thermal insulation materials overlap at their joint and are held in their winding position by tensioning straps, not shown, and pressed firmly against the outer muffle wall.

Durch die nahe des Muffelbodens 5 und der Muffeldecke 2 angeordneten Unter- und Oberhitze-Heizkörper 4 bzw. 3 entstehen in diesen beiden unmittelbar von den Heizkörpern beaufschlagten Bereichen Temperaturen oberhalb 300 oC. Infolge der guten Wärmeleitung des unmittelbar auf der Muffelwandung anliegenden Aluminiumfolienpaktes 7 werden die genannten Temperaturen in diesen Bereichen aber unterhalb 300 oC abgesenkt, so daß für die das Aluminiumfolienpaket 7 umschließende Schaumstoffmatte 8 keine Beeinträchtigung gegeben ist und somit hier ohne weiteres ein preiswertes Schaumstoffmaterial mit einer nur um 300 oC liegenden Wärmebeständigkeit eingesetzt werden kann. Auch die hochglänzende metallische Oberfläche des Aluminiumfolienpaketes 7 trägt durch Wärmereflektion zur Temperaturabsenkung in den genannten Muffelwandungsbereichen mit bei. Je nach Lagenanzahl der Aluminiumfolien 7 stellt sich an der äußeren, der Schaumstoffmatte 8 benachbarten Folienlage eine Temperatur von etwa 150 bis 250 oC ein. Die weniger temperaturbeständige Schaumstoffmatte 8 kann deshalb bei einer solchen Temperatur bedenkenlos eingesetzt werden. In der Schaumstoffmatte 8 stellt sich ein relativ niedriges Temperaturniveau ein, bei dem der Schaumstoff der Isoliermatte, bedingt durch seine geringe Dichte, auch seine besten Wärmedämmeigenschaften entwickelt.Due to the close of the muffle base 5 and the muffle ceiling 2 disposed upper and lower heat radiator 4 and 3 are formed in these two directly acted upon by the radiators areas temperatures above 300 o C. Because of the good heat conduction of the immediately adjacent to the muffle aluminum foil pact 7 are the temperatures mentioned in these areas, however, are lowered below 300 ° C., so that there is no impairment for the foam mat 8 surrounding the aluminum foil package 7 and thus an inexpensive foam material with a heat resistance of only 300 ° C. can be used without further notice. The high-gloss metallic surface of the aluminum foil package 7 also contributes to lowering the temperature in the areas of the muffle walls mentioned by means of heat reflection. Depending on the number of layers of the aluminum foils 7 is located on the outer, the foam mat 8 adjacent film layer has a temperature of about 150 to 250 o C a. The less temperature-resistant foam mat 8 can therefore be used without hesitation at such a temperature. A relatively low temperature level is set in the foam mat 8, at which the foam of the insulating mat, due to its low density, also develops its best thermal insulation properties.

Durch die vorgeschlagene Kombination beider Isoliermaterialien wird die Dämmwirkung von den bisher zum Einsatz gelangt Mineralfaserprodukten erreicht, ohne aber deren Nachteile hinsichtlich des Ausdampfens von gesundheitsschädigenden Gasen aufzuweisen.The proposed combination of the two insulating materials achieves the insulating effect of the mineral fiber products used to date, but without to have their disadvantages with regard to the evaporation of gases harmful to health.

Claims (4)

Back- und Bratofenmuffel für Herde mit einer wärmeisolierenden Umhüllung, dadurch gekennzeichnet, daß die Umhüllung (6) aus einem mehrlagigen Aluminiumfolienpaket (7) und einer Schaumstoffmatte (8) oder dgl. besteht, wobei die einzelnen Folien des Aluminiumfolienpaketes (7) um die Außenwandung der Back- und Bratofenmuffel (1) gelegt bzw. gewickelt sind und die Schaumstoffmatte (8) das Aluminiumfolienpaket (7) nach außen hin vollständig abdeckt bzw. umschließt.Baking and roasting oven muffle for cookers with a heat-insulating covering, characterized in that the covering (6) consists of a multilayer aluminum foil package (7) and a foam mat (8) or the like, the individual foils of the aluminum foil package (7) around the outer wall the baking and roasting oven muffle (1) is laid or wrapped and the foam mat (8) completely covers or encloses the aluminum foil package (7) to the outside. Back- und Bratofenmuffel nach Anspruch 1, dadurch gekennzeichnet, daß die Folien des Aluminiumfolienpaketes (7) als Prägefolie ausgebildet sind.Baking and roasting oven muffle according to claim 1, characterized in that the foils of the aluminum foil package (7) are designed as stamping foils. Back- und Bratofenmuffel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Folien des Aluminiumfolienpaketes (7) etwa 3- bis 6lagig um die Back- und Bratofenmuffel (1) gelegt bzw. gewickelt sind.Baking and roasting oven muffle according to Claim 1 or 2, characterized in that the foils of the aluminum foil package (7) are placed or wrapped approximately 3 to 6 layers around the baking and roasting oven muffle (1). Back- und Bratofenmuffel nach Anspruch 1, dadurch gekennzeichnet, daß als Schaumstoffmatte (8) eine solche Matte dient, die eine Temperaturbeständigkeit von etwa 300 oC aufweist.Baking and roasting oven muffle according to claim 1, characterized in that the foam mat (8) used is such a mat which has a temperature resistance of about 300 o C.
EP95116031A 1994-10-27 1995-10-11 Baking and roasting oven muffle with a heat insulating coating Expired - Lifetime EP0709624B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4438394 1994-10-27
DE4438394A DE4438394A1 (en) 1994-10-27 1994-10-27 Baking and roasting oven muffle with a heat-insulating coating

Publications (2)

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EP0709624A1 true EP0709624A1 (en) 1996-05-01
EP0709624B1 EP0709624B1 (en) 1999-12-22

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ID=6531842

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EP95116031A Expired - Lifetime EP0709624B1 (en) 1994-10-27 1995-10-11 Baking and roasting oven muffle with a heat insulating coating

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DE (2) DE4438394A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775871A1 (en) * 1995-11-21 1997-05-28 AEG Hausgeräte GmbH Baking and roasting oven muffle with a heat insulating coating
EP0819891A2 (en) * 1996-07-20 1998-01-21 AEG Hausgeräte GmbH Oven for cooking food
EP1253845A1 (en) * 2000-02-04 2002-11-06 The Garland Group A cooking apparatus insulated by non-fibrous means
EP2275746A3 (en) * 2009-07-14 2012-09-12 BSH Bosch und Siemens Hausgeräte GmbH Thermal insulation body, set of multiple thermal insulation bodies, domestic oven with thermal insulation and method for applying thermal insulation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10236058A1 (en) * 2001-12-27 2003-07-17 Weiss Umwelttechnik Gmbh Vibration test box system has membrane element arranged along surface of vibrator head on test chamber side that is sealed with respect to chamber floor and forms thermal barrier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT24600B (en) * 1905-02-03 1906-06-25 Johann Langer Slide device for ladders.
DE2549834A1 (en) * 1975-11-06 1977-05-18 Bosch Siemens Hausgeraete Heat insulating blanket roll for oven - has aluminium sheets with asbestos foam spacer strips confining air pockets
WO1991005208A1 (en) * 1989-10-03 1991-04-18 Brian William Harris Cooking oven
DE4304487A1 (en) * 1993-02-15 1994-08-18 Bosch Siemens Hausgeraete Baking oven

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT24600B (en) * 1905-02-03 1906-06-25 Johann Langer Slide device for ladders.
DE2549834A1 (en) * 1975-11-06 1977-05-18 Bosch Siemens Hausgeraete Heat insulating blanket roll for oven - has aluminium sheets with asbestos foam spacer strips confining air pockets
WO1991005208A1 (en) * 1989-10-03 1991-04-18 Brian William Harris Cooking oven
DE4304487A1 (en) * 1993-02-15 1994-08-18 Bosch Siemens Hausgeraete Baking oven

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775871A1 (en) * 1995-11-21 1997-05-28 AEG Hausgeräte GmbH Baking and roasting oven muffle with a heat insulating coating
EP0819891A2 (en) * 1996-07-20 1998-01-21 AEG Hausgeräte GmbH Oven for cooking food
EP0819891A3 (en) * 1996-07-20 2000-03-29 AEG Hausgeräte GmbH Oven for cooking food
EP1253845A1 (en) * 2000-02-04 2002-11-06 The Garland Group A cooking apparatus insulated by non-fibrous means
EP1253845A4 (en) * 2000-02-04 2007-01-24 Garland Group A cooking apparatus insulated by non-fibrous means
EP2275746A3 (en) * 2009-07-14 2012-09-12 BSH Bosch und Siemens Hausgeräte GmbH Thermal insulation body, set of multiple thermal insulation bodies, domestic oven with thermal insulation and method for applying thermal insulation

Also Published As

Publication number Publication date
DE59507468D1 (en) 2000-01-27
DE4438394A1 (en) 1996-05-02
EP0709624B1 (en) 1999-12-22

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