EP1400758A1 - Heizeinheit für einen Backofen - Google Patents

Heizeinheit für einen Backofen Download PDF

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Publication number
EP1400758A1
EP1400758A1 EP02425572A EP02425572A EP1400758A1 EP 1400758 A1 EP1400758 A1 EP 1400758A1 EP 02425572 A EP02425572 A EP 02425572A EP 02425572 A EP02425572 A EP 02425572A EP 1400758 A1 EP1400758 A1 EP 1400758A1
Authority
EP
European Patent Office
Prior art keywords
heating unit
heating
cooking chamber
disposed
vapours
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.)
Withdrawn
Application number
EP02425572A
Other languages
English (en)
French (fr)
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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 Candy SpA filed Critical Candy SpA
Priority to EP02425572A priority Critical patent/EP1400758A1/de
Publication of EP1400758A1 publication Critical patent/EP1400758A1/de
Withdrawn legal-status Critical Current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
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • F24C15/2014—Removing cooking fumes from oven cavities with means for oxidation of cooking fumes
    • 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

  • a heating unit intended to be mounted in a cooking chamber of an oven provided with an extraction system for extracting fumes and vapours from the interior of the cooking chamber, wherein the heating unit comprises one or more heating elements capable of heating the dishes disposed within the cooking chamber, catalyst means capable of permitting the oxidation of the substances contained in the said vapours and fumes, and conduction means capable of conveying the extracted vapours and fumes through the catalyst means, characterized in that the catalyst means are disposed in a relationship of heat exchange with at least one of the heating elements in order to utilize the heat thereof.
  • the catalyst means preferably comprise catalyst pellets or blocks of porous ceramic material or stainless steel, impregnated or coated with one or more precious metals, for example platinum, palladium or rhodium, which exhibit optimum catalytic characteristics for favouring the complete oxidation of fumes at temperatures of from 300°C to 700°C.
  • precious metals for example platinum, palladium or rhodium
  • the extraction aperture is also disposed in the said external surface of the protective plate to ensure extraction of the fumes precisely at the points at which they develop.
  • the heating unit comprises a support plate made from fibreglass-based material or ceramic which is resistant to heat and heat-insulating, and optionally reflective, to support the heating elements, disposed on one side of the heating unit opposite to the protective plate.
  • the heating elements form a plurality of functional groups which can be supplied independently in order to produce independent heating zones.
  • This advantageously, permits the simultaneous preparation, especially grilling, of different dishes, providing different periods and intensities of irradiation in the different heating zones.
  • the heating unit as the subject of the present invention described hitherto in its more general aspects, is preferably integrated into a single prefabricated device, advantageously facilitating the assembly of the oven and any operations of maintenance and replacement, as well as providing a saving of space within the oven.
  • Figure 2 is a partial lateral view in section of a further form of embodiment of the heating unit, applied to an oven;
  • FIGS 3, 4 and 5 show, in a view from below, various forms of embodiment of the heating unit according to the invention.
  • a cooking oven 1 comprises an external casing 2, within which is positioned a cooking chamber 3, preferably enclosed in a layer of heat-insulating material 4 and intended to receive the dishes to be cooked.
  • the said cooking chamber 3 is defined by an upper wall 10, a lower wall 25, a rear wall 28 and lateral walls equipped with sliding guides 29 capable of supporting, in a sliding manner, shelves 30 of the "grill” or “sheet” type that can be extracted from the cooking chamber 3 through an access aperture 5, which can be closed by means of a door 6 fixed, preferably, to the external casing 2 of the oven 1.
  • a fan 26, which can be operated by an electric motor 27, is disposed in the position of the rear wall 28 of the cooking chamber 3 and is intended to mix the air within the cooking chamber 3.
  • the oven 1 comprises a heating unit 11, disposed within the cooking chamber 3 adjacent to the upper wall 10 and equipped with one or more heating elements 8, 8', in the specific case electrical resistors 8, supported by a support plate 7 which is heat-resistant and heat-insulating, for example produced from a fibreglass-based material, which forms a heat barrier between the heating elements 8, 8' and the upper wall 10.
  • the heating unit 11 further comprises, on the side opposite to the support plate 7, at least one protective plate 9 made from a material that is substantially permeable to thermal and/or infra-red radiation, preferably a plate made from pyroceram having a high permeability to infra-red rays, and having an internal surface 9 ' facing towards the heating elements 8, 8 ' and an opposite external surface 9' ' facing towards the interior of the cooking chamber 3, in a manner such as to permit thermal and/or infra-red radiation of the dishes through the said protective plate 9.
  • a protective plate 9 made from a material that is substantially permeable to thermal and/or infra-red radiation, preferably a plate made from pyroceram having a high permeability to infra-red rays, and having an internal surface 9 ' facing towards the heating elements 8, 8 ' and an opposite external surface 9' ' facing towards the interior of the cooking chamber 3, in a manner such as to permit thermal and/or infra-red radiation
  • the said catalyst pellet 22 is disposed in a relationship of heat exchange with at least one of the said heating elements 8 in order to utilize directly the heat thereof.
  • the upper wall 10 of the cooking chamber 3 no longer being exposed to excessive heat stresses, may advantageously be designed solely for its structural functions, or could even be omitted.
  • the heating elements 8, 8' form two functional groups 8a and 8b, defining two independent heating zones, in which a first functional group 8a comprises halogen lamps 8' supported by a support frame, formed on the support plate 7, and a second functional group 8b comprises both a halogen lamp 8' and an electrical resistor 8 of helical shape, both supported by a similar frame formed on the support plate 7.
  • the two functional groups 8a and 8b can be powered independently, so as to produce the periods and intensity of thermal and/or infra-red irradiation suitable for the type of grilling or cooking of the dishes respectively disposed below the different heating zones.
  • Two extraction apertures 17a and 17b, and preferably though not necessarily two catalysts 22a and 22b, are disposed at the locations of the said two functional groups 8a and 8b.
  • Figure 4 shows an example of embodiment in which a number of tubular and substantially parallel halogen lamps 8' form a single functional group, at the centre of which is disposed the extraction aperture 17, preferably covered by the filter 23, aligned with the external surface 9' ' of the protective plate 9.
  • the extraction aperture 17, and therefore the catalyst element 22 as well are disposed in the gap between two functional groups 8a and 8b of the heating elements 8, 8'.
  • the said extraction aperture 17 may be disposed substantially at the centre of a single heating zone, in particular the larger and more powerful of the two heating zones.
  • the heating elements 8, 8' irradiate, by means of thermal and/or infra-red radiation, the surface of the dishes, for example of a steak disposed on a shelf below a heating zone.
  • other foods for example vegetables, can be heated or grilled when disposed below other heating zones, different temperatures and periods of irradiation being applied.
  • the fumes and vapours which develop within the cooking chamber 3 are extracted in a well-directed manner through the extraction aperture 17, being passed through the filter 23 and the catalyst pellet 22 disposed in the tubular portion 21 within the heating unit 11.
  • the catalyst 22 positioned in a relationship of heat exchange with the heating elements 8, 8', makes direct use of the heat of the said heating elements to lower the temperature necessary for the complete oxidation of the substances contained in the extracted fumes and vapours, permitting their oxidation and, consequently, effective reduction of odours.
  • the grilling and/or cooking time is set by means of the selector switch 12 of the control panel 13 or is calculated by the control unit 14, which controls the power supply to the individual heating functional groups 8a, 8b, preferably in combination with the extraction of the fumes through the extraction apertures disposed in the locations of the heating functional groups.
  • the heating unit 11 which is advantageously prefabricated and equipped with any fixing means necessary for fixing it to the cooking chamber 3.
  • any replacement of the filter and/or of the catalyst can conveniently be undertaken from the cooking chamber 3, without being obstructed by electrical resistors or the like.
  • the support plate 7 possesses, on its surface facing the protective plate 9, one or more recesses to accommodate fully the heating elements 8, 8', and the protective plate 9 is joined to the support plate 7 in a manner such as to close the recesses containing the said heating elements 8, 8', which may advantageously be evacuated in order to allow, for example, greater protection of the electrical resistors 8.
  • the internal surface 9' and the external surface 9' ' of the protective plate 9 may present a structure such as to diffuse the thermal and/or infra-red radiation in order to provide substantially uniform irradiation of the dishes.

Landscapes

  • 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)
EP02425572A 2002-09-23 2002-09-23 Heizeinheit für einen Backofen Withdrawn EP1400758A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02425572A EP1400758A1 (de) 2002-09-23 2002-09-23 Heizeinheit für einen Backofen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02425572A EP1400758A1 (de) 2002-09-23 2002-09-23 Heizeinheit für einen Backofen

Publications (1)

Publication Number Publication Date
EP1400758A1 true EP1400758A1 (de) 2004-03-24

Family

ID=31897014

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02425572A Withdrawn EP1400758A1 (de) 2002-09-23 2002-09-23 Heizeinheit für einen Backofen

Country Status (1)

Country Link
EP (1) EP1400758A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005047775A1 (en) * 2003-10-31 2005-05-26 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Catalytic cell for cooking ovens
EP1666799A1 (de) * 2004-11-16 2006-06-07 Electrolux Home Products Corporation N.V. Garofenmuffel mit Katalysator
CN103765109A (zh) * 2012-06-12 2014-04-30 李永熙 具有热解功能的电烤炉
EP2824394A1 (de) * 2013-07-11 2015-01-14 Miele & Cie. KG Gargerät und Katalysatoreinrichtung
WO2019032906A1 (en) 2017-08-09 2019-02-14 Brava Home, Inc. MULTIZONE COOKING USING A COOKING APPARATUS THAT CAN BE CONFIGURED BY A SPECTRAL VIEW
CN113397371A (zh) * 2021-06-30 2021-09-17 广东美的厨房电器制造有限公司 烹饪器具

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290483A (en) * 1964-09-15 1966-12-06 Gen Electric Combined broiler and catalytic oxidation unit
US3785778A (en) * 1971-03-23 1974-01-15 Smokontrol Corp Smoke eliminating device
DE2305025A1 (de) * 1973-02-02 1974-08-08 Burger Eisenwerke Ag Verfahren zum selbsttaetigen reinigen der innenwaende eines brat- oder backofens
GB2035826A (en) * 1978-11-29 1980-06-25 Dietrich & Cie De Catalytic cell for the treatment of cooking fumes
EP0500471A1 (de) * 1991-02-21 1992-08-26 Société SCHOLTES Haushaltkochofen
EP0663568A1 (de) * 1994-01-12 1995-07-19 Société SCHOLTES Haushaltskochofen
US6318245B1 (en) * 1998-10-22 2001-11-20 Rational Ag Cooking device with a catalyst
DE10062827A1 (de) * 2000-12-15 2002-06-20 Miele & Cie Backofen mit Wrasenkanal

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290483A (en) * 1964-09-15 1966-12-06 Gen Electric Combined broiler and catalytic oxidation unit
US3785778A (en) * 1971-03-23 1974-01-15 Smokontrol Corp Smoke eliminating device
DE2305025A1 (de) * 1973-02-02 1974-08-08 Burger Eisenwerke Ag Verfahren zum selbsttaetigen reinigen der innenwaende eines brat- oder backofens
GB2035826A (en) * 1978-11-29 1980-06-25 Dietrich & Cie De Catalytic cell for the treatment of cooking fumes
EP0500471A1 (de) * 1991-02-21 1992-08-26 Société SCHOLTES Haushaltkochofen
EP0663568A1 (de) * 1994-01-12 1995-07-19 Société SCHOLTES Haushaltskochofen
US6318245B1 (en) * 1998-10-22 2001-11-20 Rational Ag Cooking device with a catalyst
DE10062827A1 (de) * 2000-12-15 2002-06-20 Miele & Cie Backofen mit Wrasenkanal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005047775A1 (en) * 2003-10-31 2005-05-26 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Catalytic cell for cooking ovens
EP1666799A1 (de) * 2004-11-16 2006-06-07 Electrolux Home Products Corporation N.V. Garofenmuffel mit Katalysator
CN103765109A (zh) * 2012-06-12 2014-04-30 李永熙 具有热解功能的电烤炉
CN103765109B (zh) * 2012-06-12 2016-05-11 李永熙 具有热解功能的电烤炉
EP2824394A1 (de) * 2013-07-11 2015-01-14 Miele & Cie. KG Gargerät und Katalysatoreinrichtung
DE102013107361A1 (de) * 2013-07-11 2015-01-15 Miele & Cie. Kg Gargerät und Katalysatoreinrichtung
WO2019032906A1 (en) 2017-08-09 2019-02-14 Brava Home, Inc. MULTIZONE COOKING USING A COOKING APPARATUS THAT CAN BE CONFIGURED BY A SPECTRAL VIEW
CN113397371A (zh) * 2021-06-30 2021-09-17 广东美的厨房电器制造有限公司 烹饪器具

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