EP0995951B1 - Four de cuisson avec moyens de nettoyage par pyrolyse - Google Patents

Four de cuisson avec moyens de nettoyage par pyrolyse Download PDF

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Publication number
EP0995951B1
EP0995951B1 EP99120167A EP99120167A EP0995951B1 EP 0995951 B1 EP0995951 B1 EP 0995951B1 EP 99120167 A EP99120167 A EP 99120167A EP 99120167 A EP99120167 A EP 99120167A EP 0995951 B1 EP0995951 B1 EP 0995951B1
Authority
EP
European Patent Office
Prior art keywords
baking oven
muffle
oven
heating element
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99120167A
Other languages
German (de)
English (en)
Other versions
EP0995951A2 (fr
EP0995951A3 (fr
Inventor
Josef Gerl
Bernd Hopfenmüller
Helmut Knoll
Christian Zimmermann
Hans Lappat
Klemens Roch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0995951A2 publication Critical patent/EP0995951A2/fr
Publication of EP0995951A3 publication Critical patent/EP0995951A3/fr
Application granted granted Critical
Publication of EP0995951B1 publication Critical patent/EP0995951B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • 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 present invention relates to an oven according to the preamble of Claim 1.
  • From US-A-3 530 847 is a generic oven with a self-cleaning function known.
  • the oven has a lower convection heater and an upper one Radiant heating element for heating a cooking space of the oven to a temperature which is sufficiently large for pyrolytic self-cleaning.
  • Such an oven is also known from the publication US 3,668,371, in which Cooking space below the top wall and above the bottom wall of the muffle Tubular heating element is provided for cooking. In self-cleaning mode, that will be first heating element disconnected from the mains, while the second heating element on mains voltage is laid.
  • the focus of the oven muffle is about a temperature 320 ° C in contrast to that otherwise normally achieved in pyrolysis operation Center temperature of 450 ° C.
  • the with the according to the publication US 3,668,371 significantly reduced center of gravity associated relatively low Muffle wall temperatures are, however, in the area of the less soiled muffle side walls sufficiently large for a cleaning.
  • This temperature is suitable for the Usually heavily soiled bottom area of the oven muffle pyrolytically to be able to clean.
  • the object of the present invention is in an oven according to the preamble of Claim 1 to facilitate cleanability.
  • this is in an oven according to the preamble of the claim thereby those listed in the characterizing part of claim 1 Characteristics achieved.
  • the one remaining in the oven muffle after the pyrolysis process Ash can be removed from the bottom wall in a particularly simple manner or respectivelyzuwischen.
  • the adverse corners and spaces between the Second radiators and the bottom wall according to the prior art are omitted according to the invention.
  • Through the shielding of the second heating element Bottom wall compared to the cooking space a greater temperature difference between the Bottom wall and the side walls or the top wall of the muffle during pyrolysis operation adjustable.
  • the thermal coupling of the second heating element to the floor panel or on the bottom wall is improved according to the invention in that both are thermally connected to each other.
  • the heating element can advantageously For example, be implemented directly on the floor panel using thick-film technology.
  • the bottom wall is advantageously approximately 0.5 mm thick.
  • the bottom wall By forming the bottom wall as a separate part, it is possible to have a smaller wall thickness than that of the oven muffle to choose to use a different material or to use the floor pan special dirt-repellent layers. Due to the low heat capacity the bottom wall reduces the power requirement in pyrolysis operation. Farther is the energy requirement for a cooking process, which also includes the second heating element is switched on, reduced compared to thicker bottom wall thicknesses.
  • the oven muffle has a closed one Floor
  • the second heating element is arranged above the floor, and is above the second heating element, the bottom wall in the form of a particular from Muffle removable floor plate arranged.
  • the closed bottom of the oven muffle guarantees that the cooking space is completely sealed bottom as well as additional thermal insulation with respect to the radiated down Heat radiation from the second heating element.
  • a removable floor panel offers also advantages when cleaning the oven.
  • the second heating element is slightly spaced from the bottom of the oven muffle.
  • the arrangement of a reflector element between serves the same purpose the second heating element and the bottom of the oven muffle. In both cases Heating up the oven muffle base and transferring the heat to the others Walls of the oven muffle significantly reduced.
  • the Bottom wall essentially via point or line-shaped contact points in the Oven muffle held.
  • the drainage in the floor wall or in the floor panel Heat absorbed into the walls of the oven muffle can be avoided by this measure be significantly reduced.
  • the oven muffle has a catalytic coating.
  • these areas of the muffle wall with a special easy to clean layer are coated. This can be done, for example, through special Enamel or sol-gel layers can be realized.
  • an oven has a housing 1 in which a cuboid oven muffle 3 defining a cooking space is held (FIG. 1). This is open on the front and with one articulated on the housing 1 or the muffle 3 Oven door 5 lockable.
  • the oven muffle 3 has a heat insulation layer on all sides 7 surrounded.
  • Here is the amount of insulation material or the requirement to the insulation properties of the heat insulation layer 7 due to the pyrolysis operation occurring low operating temperatures, as explained below, in comparison to conventional ovens with an external bottom heat radiator reduced.
  • Below the ceiling of the oven muffle 3 is an upper heat radiator 9 and Above the oven base 12 there is a lower heat radiator 11 at a distance from it supported.
  • the top of the oven bottom 12 is the heat radiation of the Underheating radiator 11 reflective metal layer 13 covered.
  • the reflective property also by a suitable inserted in the oven muffle 3 Reflector plate can be realized.
  • the distance between the lower heat radiator 11 and the oven floor 12 or the reflector layer 13 is over their entire Area at least a few mm.
  • the oven base 12 has embossments distributed over its surface, on which the Lower heat radiator 11 rests essentially at a point.
  • the bottom heat radiator 11 or the oven base 12 is completely removable by a in the oven muffle 3 covered bottom plate 15 covered.
  • the wall thickness the bottom plate 15 is about 0.4-0.5 mm.
  • the bottom plate 15 can both on the Be held inside the oven door 5, especially if it is in the form of a known baking cart is formed, can on the side walls or the rear wall the oven muffle 3 can be held in known groove baking tubes or in a special provided in the oven muffle 3 known food support frame or be held in the muffle side walls of the guide grids.
  • the base plate 15 not to be removable from the oven muffle 3 to attach.
  • the bottom plate 15 has the smoothest possible surface contour to make it easier to wipe out pyrolysis residues.
  • a food support 17 can be held in the oven muffle 3 at different heights.
  • a control unit 21 can be used to operate the oven by means of an operating unit 19 Pyrolysis or cooking mode request can be communicated.
  • the control unit 19 Pyrolysis or cooking mode request can be communicated.
  • the control unit 19 the control unit 21, the radiators 9, 11 and other functional elements known per se ovens, such as a cooking space temperature sensor, via connecting lines 23 connected.
  • the lower heat radiator 11 is due to the thin bottom plate 15 shielded from the food.
  • the extent of thermal shielding is, however, less than in the case of the known arrangement of a bottom heat radiator outside the oven muffle 3 below the oven base 12.
  • the control unit 21 switches the top heat radiator 9 off and operates it the lower heat radiator 11 at full power. This results in heating of the bottom plate 15 to about 500 ° C, while the oven temperature remains below 350 ° C.
  • the primary contamination area of the oven muffle 3, namely the bottom plate 15 is cleaned pyrolytically. Due to the low thermal Mass of the bottom plate 15, the poor thermal coupling to the Walls of the oven muffle 3 or the arrangement of the reflector layer 13 is thereby electrical energy saved.
  • FIG. 2 that differ from the first exemplary embodiment of an oven according to the second embodiment is trough-shaped Floor plate 15 on its underside with a serving as a bottom heat radiator 11 Provide tubular heater. This is via plug connections not shown in the Area of the rear wall of the oven muffle 3 electrically contactable. If this connector is designed to be sufficiently stable, it can be used to hold the lower heat body alone be used in the oven muffle.
  • this connector In the side walls of the oven muffle 3 formed horizontal guide grooves 31 is shown in FIG. 2 the bottom plate 15 can be inserted stably at a distance from the reflector layer 13. The end section of an unflanged side wall region 33 of the base plate rests 15 linearly on a guide surface of the groove 31.
  • the control unit 21 detects the presence of the lower heat radiator 11 or its ohmic resistance and thus the bottom plate 15 in the oven muffle 3.
  • a cooking or pyrolysis operation only possible when the control unit 21 determines the presence of the floor plate 15.
  • the shielding of the lower heat radiator 11 by the thin and thermal bottom plate 15 weakly coupled to the oven muffle walls can large temperature differences between the primary pollution area in a particularly simple manner - the floor panel - and the secondary pollution areas - the top and side walls - can be adjusted.
  • the leads in particular weak thermal coupling of the bottom plate 15 to the walls of the oven muffle 3 low energy consumption in pyrolysis operation.
  • a circulating air fan not shown, remains essentially switched off.

Claims (7)

  1. Four de cuisson avec moyens d'autonettoyage par pyroliyse, comprenant un espace de cuisson pouvant être fermé par une porte et limité par un moufle de four, comprenant un premier élément chauffant placé en dessous de la paroi de recouvrement du moufle dans l'espace de cuisson et un deuxième élément chauffant attribué à la paroi de fond, dont la puissance de chauffage en fonctionnement par pyrolyse est nettement supérieure à celle du premier élément chauffant, laquelle paroi (15) de fond est formée comme une pièce séparée et est maintenue dans la partie de fond du moufle (3) de four au-dessus du deuxième élément chauffant (11) et recouvre celui-ci, caractérisé en ce que la paroi de fond resp. la tôle de fond (15) et le deuxième élément chauffant (11) sont raccordés entre eux.
  2. Four de cuisson selon la revendication 1, caractérisé en ce que la paroi de fond (15) a une épaisseur maximale d'env. 0,5 mm.
  3. Four de cuisson selon la revendication 1 ou 2, caractérisé en ce que le moufle (3) de four possède un fond fermé (12), en ce qu'au-dessus du fond (12) est placé le deuxième élément chauffant (11) et en ce qu'au-dessus du deuxième élément chauffant (11), la paroi de fond (15) est placée sous forme d'une tôle de fond, notamment en étant amovible hors du moufle (3).
  4. Four de cuisson selon la revendication 3, caractérisé en ce que le deuxième élément chauffant (11) est légèrement distancé du fond (12) du moufle (3) de four.
  5. Four de cuisson selon la revendication 3 ou 4, caractérisé en ce qu'un élément réflecteur (13) est placé entre le deuxième élément chauffant (11) et le fond (12) du moufle (3) de four.
  6. Four de cuisson selon l'une quelconque des revendications précédentes, caractérisé en ce que la paroi (15) de fond est essentiellement maintenue dans le moufle (3) de four par des points de contact (31, 33) en forme de points resp. de lignes.
  7. Four de cuisson selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins des zones partielles des parois latérales et/ou la paroi de recouvrement du moufle (3) de four présentent un revêtement catalytique (25).
EP99120167A 1998-10-23 1999-10-08 Four de cuisson avec moyens de nettoyage par pyrolyse Expired - Lifetime EP0995951B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19849040 1998-10-23
DE19849040A DE19849040A1 (de) 1998-10-23 1998-10-23 Backofen mit Mitteln zur pyrolytischen Selbstreinigung

Publications (3)

Publication Number Publication Date
EP0995951A2 EP0995951A2 (fr) 2000-04-26
EP0995951A3 EP0995951A3 (fr) 2001-07-04
EP0995951B1 true EP0995951B1 (fr) 2004-07-21

Family

ID=7885489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120167A Expired - Lifetime EP0995951B1 (fr) 1998-10-23 1999-10-08 Four de cuisson avec moyens de nettoyage par pyrolyse

Country Status (3)

Country Link
EP (1) EP0995951B1 (fr)
AT (1) ATE271675T1 (fr)
DE (2) DE19849040A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354667A2 (fr) 2010-01-29 2011-08-10 Fagor, S. Coop. Four à pyrolyse, de préférence four à pyrolyse domestique
DE102011010283A1 (de) 2011-02-03 2012-08-09 i-clean Technologies GmbH Verfahren zur Reinigung eines Haushalts-Gargerätes
DE102013209707A1 (de) 2013-05-24 2014-11-27 BSH Bosch und Siemens Hausgeräte GmbH Küchengeräte mit leicht reinigbaren oberflächen und verfahren zu deren aufbringung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349312A1 (de) * 2003-10-23 2005-05-25 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und Backofen zur pyrolytischen Selbstreinigung einer Backofenmuffel
WO2009083390A1 (fr) * 2007-12-31 2009-07-09 Arcelik Anonim Sirketi Four
DE102012224035A1 (de) * 2012-12-20 2014-06-26 BSH Bosch und Siemens Hausgeräte GmbH Gargerät
DE102014201639A1 (de) 2014-01-30 2015-07-30 BSH Hausgeräte GmbH Backrohr
DE102017211289A1 (de) 2017-07-03 2019-01-03 BSH Hausgeräte GmbH Koch-, Brat-, Back- oder Grillgerät mit funktioneller Beschichtung, sowie Verfahren zur Erneuerung der Beschichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353004A (en) * 1964-10-09 1967-11-14 Gen Motors Corp Domestic electric appliance
US3530847A (en) * 1968-04-02 1970-09-29 Caloric Corp Gas-fueled self-cleaning oven
US3668371A (en) * 1971-06-16 1972-06-06 Gen Motors Corp Circuit arrangement for accelerated continuous cleaning of self cleaning oven coatings
FR2238119B2 (fr) * 1973-07-17 1976-04-30 Cepem
NO770418L (no) * 1976-02-13 1977-08-16 Witte & Co Stephan Mikrob¦lgekomfyr.
US5038748A (en) * 1990-08-30 1991-08-13 General Electric Company Self-cleaning gas range having heat baffle assembly
US5387258A (en) * 1991-12-30 1995-02-07 Fulgor S.P.A. Self-cleaning oven

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354667A2 (fr) 2010-01-29 2011-08-10 Fagor, S. Coop. Four à pyrolyse, de préférence four à pyrolyse domestique
DE102011010283A1 (de) 2011-02-03 2012-08-09 i-clean Technologies GmbH Verfahren zur Reinigung eines Haushalts-Gargerätes
DE102013209707A1 (de) 2013-05-24 2014-11-27 BSH Bosch und Siemens Hausgeräte GmbH Küchengeräte mit leicht reinigbaren oberflächen und verfahren zu deren aufbringung

Also Published As

Publication number Publication date
DE59909999D1 (de) 2004-08-26
EP0995951A2 (fr) 2000-04-26
EP0995951A3 (fr) 2001-07-04
DE19849040A1 (de) 2000-04-27
ATE271675T1 (de) 2004-08-15

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