EP1793175A1 - Ofenvorrichtung - Google Patents

Ofenvorrichtung Download PDF

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Publication number
EP1793175A1
EP1793175A1 EP06291768A EP06291768A EP1793175A1 EP 1793175 A1 EP1793175 A1 EP 1793175A1 EP 06291768 A EP06291768 A EP 06291768A EP 06291768 A EP06291768 A EP 06291768A EP 1793175 A1 EP1793175 A1 EP 1793175A1
Authority
EP
European Patent Office
Prior art keywords
enclosure
synthetic material
sheets
heating
fibers
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Withdrawn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
EP06291768A
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English (en)
French (fr)
Inventor
Frédéric Covin
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.)
Constructions Isothermiques Bontami CIB SAS
Original Assignee
Constructions Isothermiques Bontami CIB SAS
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 Constructions Isothermiques Bontami CIB SAS filed Critical Constructions Isothermiques Bontami CIB SAS
Publication of EP1793175A1 publication Critical patent/EP1793175A1/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Withdrawn legal-status Critical Current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
    • F24C15/34—Elements and arrangements for heat storage or insulation

Definitions

  • the invention relates to the field of furnaces and furnace thermal chambers, particularly for communities or restaurants.
  • furnaces which generally comprise an enclosure provided with a door, electrical heating resistances of the interior of the enclosure and a control panel.
  • the document EP 0 737 423 B1 describes an installation for the automatic processing of goods to be refrigerated, goods to be cooked and bakery products having inlet channels and outlet channels for heating / cooling streams arranged one above the other in a storage space.
  • refrigeration and cooking with grills can be divided by plug-in devices having an insulating action, in chambers for the treatment and preservation of food separated from each other.
  • the refrigeration and cooking space is insulated and designed for temperatures up to 300 ° C.
  • the document EP 1 302 144 describes an oven of the same kind.
  • the construction of the enclosure is made from an outer shell sheet metal self-supporting, an inner shell also self-supporting sheet metal and an insulation based on rock wool or glass held between the inner and outer hulls.
  • the metal sheets must be of relatively high thickness to have sufficient rigidity, resulting in a high mass of the enclosure and a significant cost of raw material.
  • the metal sheets of the inner and outer shells are welded together, resulting in a high labor cost for welding and polishing outside the weld.
  • the present invention aims to overcome the disadvantages of the apparatus above.
  • the present invention aims to obtain a furnace enclosure and a low mass furnace, reasonable raw material cost, simple assembly, while having the required qualities of insulation and hygiene, including for the treatment of food products.
  • the furnace device comprises an enclosure defining an interior space, a means for heating the interior space, a control means for the heating means, the enclosure comprising a plurality of insulating panels provided with an outer sheet, a internal sheet and a synthetic material disposed between said sheets, providing the mechanical connection between the sheets and giving said panels the desired rigidity.
  • Desired rigidity is a stiffness sufficient to support the other elements of the enclosure in particular, and the oven in general, that the panel is intended to form a bottom panel, a side panel, a bottom panel or a panel superior.
  • said synthetic material is a thermally insulating material, in particular a material in the form of a foam containing gas bubbles.
  • the enclosure is capable of withstanding up to a maximum temperature of 130 ° C.
  • the outer and inner plates are folded.
  • the outer and inner plates are assembled by the synthetic material, which is more economical than the assembly by welding.
  • the outer and inner plates are made of thick stainless steel less than 1 mm, preferably less than 0.7 mm, for example of the order of 0.5 mm.
  • the synthetic material comprises a polyurethane foam.
  • a foam formed predominantly or completely of polyurethane has excellent thermal insulation qualities and sufficient mechanical characteristics to maintain together the outer and inner sheets and form with said sheets a self-supporting assembly and sufficient rigidity to form a furnace panel.
  • the synthetic material further comprises heat-resistant fibers, especially in the vicinity of the inner sheet.
  • the fibers may be vegetable or mineral fibers.
  • the fibers may form a plate disposed in the thickness of the polyurethane foam, for example halfway between the inner and outer laminations.
  • the synthetic material is molded between the outer and inner plates.
  • the enclosure comprises a plurality of loading levels of objects to be treated, the power of the heating means being internal to 500 W per level, preferably less than 400 W per level.
  • Such heating means are particularly economical, both in terms of cost of purchase and cost of installation of the oven in the room where it will be used thanks to the current electrical connections that are sufficient for its power supply.
  • control means is capable of permanently limiting the cooking temperature to a value less than or equal to 120 ° C ⁇ 10 ° C and the cooling temperature to a value greater than or equal to at - 20 ° C ⁇ 10 ° C for frozen products or 3 ° C ⁇ 3 ° C for refrigerated products.
  • the heating means may comprise an electrical resistance and / or a heating and cooling block capable of alternately providing heating and cooling.
  • Such an oven can be used both for cooking food for cooling or maintaining a low temperature, or their return to a temperature close to the temperature of consumption.
  • the oven referenced 1 as a whole comprises an enclosure 2 in the form of a box comprising five thermally insulating panels, left-side 3, upper 4, bottom 5, right-side 6 and lower 7.
  • the five insulating panels 3 to 7 are mutually hooked two by two by folds of sheet metal, or angles.
  • the enclosure 2 comprises a door 8 constructed from an insulating panel similar to the other panels insulators and connected by hinges and a latch not shown.
  • the door 8 is equipped with a handle 9.
  • Electrical resistors 10 forming a heating means are arranged in the enclosure 2 and supported by the bottom panel 5.
  • the electrical resistors 10 are four in the embodiment illustrated in FIG. 1.
  • the oven 1 can be provided with an equal number of stages formed by grids, known per se, to form a four-stage furnace.
  • the electrical power of each resistor 10 may be less than 500 W, preferably less than 400 W.
  • the oven 1 also comprises a lower block 11 disposed under the box 2 for the cooling of the inside of the enclosure.
  • the lower block 11 comprises a compressor 12, an evaporator 13, a fan 14 and a pipe 15 opening into the chamber 2.
  • the compressor 12 compresses a refrigerant, for example of the type commonly used in refrigeration systems.
  • the evaporator 13, receiving the compressed fluid from the compressor 12, is able to cool a fluid, in particular a gas such as air passing through it from a pipe 29 connected to the enclosure 2, said gas being driven by the fan 14 and opening through the conduit 15 inside the chamber 2 so that it is able to cool.
  • the lower block 11 can also be used inversely as a means of heating the chamber 2 by cooling the ambient air to assist or replace the resistors 10.
  • the oven 1 further comprises a control panel 16 provided with control buttons 17 of the mechanical or electronic type, for example a touch screen connected to a processing unit 18, so that an operator can enter parameters relating to the foodstuffs. treat, the processing unit being able to control the electrical resistors 10, the compressor 12, the fan 14 and a display panel 19 also part of the control panel 16, and allowing an operator to follow the progress of operations of food processing, for example the the type of phase, the temperature, the time remaining for the food to be ready to serve, or the data provided by the operator that it is desirable to display.
  • control buttons 17 of the mechanical or electronic type, for example a touch screen connected to a processing unit 18, so that an operator can enter parameters relating to the foodstuffs. treat, the processing unit being able to control the electrical resistors 10, the compressor 12, the fan 14 and a display panel 19 also part of the control panel 16, and allowing an operator to follow the progress of operations of food processing, for example the the type of phase, the temperature, the time remaining for the food to be ready to serve, or the
  • the control unit 18 is designed to be connected to sensors disposed in the enclosure 2, in particular a temperature sensor 20 and a humidity sensor 21.
  • the control unit 18 is designed to limit the temperature range of operating the oven at a minimum temperature of the order of -30 to -10 ° C and a maximum temperature of about 110 to 130 ° C, so as to reduce energy consumption and preserve the constituent materials of the oven .
  • a first phase of operation can be a maintenance at a low temperature of food preservation arranged in the chamber 2, then a cooking phase, then a holding phase at a hot storage temperature.
  • a cold storage holding step may be inserted between the baking step and the holding step at a hot storage temperature to preserve the food for a longer period of time and prevent drying out. It is also possible to provide a first cooking phase followed or not by a cooling phase and / or a high temperature preservation phase.
  • the oven is devoid of resistance 10. In another variant, the oven does not have a lower block 11.
  • an insulating panel 22 comprises an outer sheet 23, an inner sheet 24 and a filling of insulating material 25.
  • the sheets 23 and 24 are of equal thickness and made of stainless steel or alloy steel-based stainless, thin, for example of the order of 0.5 mm.
  • the sheets 23 and 24 can be connected at their ends not shown, one to the other by folding with mutual overlap, or by folding with mutual contact and maintenance by the filling of insulating material 25, or with formation of edges outside likely to hang with neighboring panels.
  • the sheets 23 and 24 can thus be fixed to one another without welding, the insulating filling 25 adhering to the inner surfaces of said sheets 23 and 24.
  • the inner fill may consist of a polyurethane-based foam or consist of only polyurethane.
  • the insulating filling 25 comprises a honeycombed cardboard plate 26 disposed substantially midway between the sheets 23 and 24, the remainder of the available volume between said sheets 23 and 24 and the honeycombed cardboard 26 being filled with foam 27 based on polyurethane or made only of polyurethane.
  • the cardboard 26 has, like the foam 27, excellent insulation and lightness, while being more economical than the polyurethane foam.
  • the insulating panel 22 has a thickness of between 30 mm and 130 mm, preferably of the order of 60 mm.
  • organic fibers may be dispersed or dispersed in the foam 27, or organic fibers may be used in the form of a fiber plate.
  • organic fibers may be vegetable fibers derived from culture, such as wood fibers, corn, coconut or hemp.
  • the thermal insulation element is generally manufactured by means of a press mold. Inside a horizontally mounted lower half-mold, is disposed the sheet 23.
  • the cardboard plate 26 is then mounted substantially parallel to the sheet 23 and fixedly held by means of a wedging device, comprising, for example, pivoting fingers exerting a holding pressure on the cardboard plate 26.
  • a corresponding upper half-mold is then fed which supports the sheet metal 24 and which is maintained in parallel press to the sheet 23.
  • Foam 27 is injected of pressurized polyurethane inside the envelope formed by the sheets 23 and 24. During the injection of foam 27, the sheets 23 and 24 are kept in press.
  • the insulating panel 22 is also kept in press during the curing phase. Once the curing phase of the foam 27 has ended, in other words the predetermined time has elapsed, the press is removed.
  • honeycombed honeycomb cardboard 28 consists of two parallel cardboard sheets located at a distance from the cardboard. one of the other and cardboard walls arranged perpendicularly between the two parallel sheets, so as to form cells similar to honeycombs, hexagonal shape, regular or not. Since the walls of the cells are perpendicular to the parallel sheets, the resistance of honeycombed cardboard 28 to external pressures is particularly high.
  • honeycombed cardboard 28 is arranged with a plurality of layers, for example three, juxtaposed in the direction of the thickness, in order to increase the amount of cardboard used. It reduces the cost of the insulating panel 22 and the ecological risks that may be caused by the polyurethane foam 27. The manufacturing cost of the panel 22 is reduced and the negative impact on the environment resulting from the poor biodegradability of the polyurethane foams is reduced.
  • the oven-refrigerator combination benefits from particularly economical insulation panels that can withstand temperatures of up to 120 to 130 ° C.
  • the implementation of improved polyurethane foam could allow to increase the maximum temperature of the oven.
  • the polyurethane foam constituting the inside of the insulating panels, possibly supplemented by one or more sheets of cardboard, offers characteristics particularly interesting in terms of cost, mechanical strength, which can greatly reduce the thickness of the stainless steel sheets used to form the skins of the panels, hence panels and a reduced mass enclosure, which is very advantageous for the handling of the panels and the enclosures during the manufacture and the increase of the working comfort of the operators.
  • Polyurethane foam provides the mechanical connection between the sheets, due to its mechanical properties and adhesion to the internal face of the sheets, which gives the insulating panels an appreciable robustness despite their lightness and sufficient rigidity to support other panels , the elements of the furnace, such as the electric resistances or the refrigerating elements if necessary.
  • the inner and outer laminations can be hung seamlessly to one another, resulting in a significant reduction in labor costs due to welding and post-weld polishing.
  • the inner and outer plates can easily be folded at their ends to promote mutual bonding and / or to hang on the ends of other sheets of neighboring panels.
  • the enclosure may thus consist of panels hung by their edges by folds of sheets formed for this purpose.
  • the panels can be hooked to one another by end folds of the sheets connected by U-shaped sections.
  • the furnace can be made from inexpensive and light panels, using a small amount of metal and is very well suited for low temperature cooking at temperatures of 130 ° C or lower.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)
EP06291768A 2005-11-16 2006-11-15 Ofenvorrichtung Withdrawn EP1793175A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0511622A FR2893391B1 (fr) 2005-11-16 2005-11-16 Dispositif combine four-refrigerateur

Publications (1)

Publication Number Publication Date
EP1793175A1 true EP1793175A1 (de) 2007-06-06

Family

ID=37000053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06291768A Withdrawn EP1793175A1 (de) 2005-11-16 2006-11-15 Ofenvorrichtung

Country Status (2)

Country Link
EP (1) EP1793175A1 (de)
FR (1) FR2893391B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2484982A1 (de) * 2011-02-08 2012-08-08 Electrolux Home Products Corporation N.V. Backofen mit wärmeisoliertem Ofeninnenraum
US12025258B2 (en) 2018-12-19 2024-07-02 Dow Global Technologies Llc Bonded multilayer article

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103109882A (zh) * 2013-03-08 2013-05-22 博湖县蓝翔食品水产有限公司 自动化烤鱼装置

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1585404A (en) * 1925-04-28 1926-05-18 Standard Gas Equipment Corp Insulating means
US1836888A (en) * 1928-11-21 1931-12-15 Cribben & Sexton Company Oven
US2170409A (en) * 1936-06-01 1939-08-22 Johns Manville Stove oven
US2387809A (en) * 1941-10-28 1945-10-30 Arnold L Rose Gas range
DE2446135A1 (de) * 1974-09-27 1976-04-15 Delbrouck Franz Fa Bausatz fuer kuehlmoebel
FR2369932A1 (fr) * 1976-11-05 1978-06-02 Isotecnica Spa Panneau sandwich thermo-isolant compose par une tole, une couche de materiau expanse et un enduit de mortier
EP0110143A1 (de) * 1982-10-29 1984-06-13 COMPAGNIE EUROPEENNE POUR L'EQUIPEMENT MENAGER "CEPEM" Société anonyme dite: Gerät mit Kochraum
JPH11241428A (ja) * 1998-02-23 1999-09-07 Mitsubishi Heavy Ind Ltd 保温パネル
US6224179B1 (en) * 1995-05-31 2001-05-01 Bsh Bosch Und Siemens Hausgeraete Gmbh Heat-insulating housing as well as a household oven and a household refrigerator having the housing
US6257684B1 (en) * 1997-10-16 2001-07-10 Bsh Bosch Und Siemens Haus-Geraete Gmbh Heat insulation wall
DE10046924A1 (de) * 2000-09-21 2002-04-18 Bsh Bosch Siemens Hausgeraete Wärmeisolierendes Gehäuse
EP1302144A2 (de) * 2001-10-15 2003-04-16 Whirlpool Corporation Gekühlter Ofen

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1585404A (en) * 1925-04-28 1926-05-18 Standard Gas Equipment Corp Insulating means
US1836888A (en) * 1928-11-21 1931-12-15 Cribben & Sexton Company Oven
US2170409A (en) * 1936-06-01 1939-08-22 Johns Manville Stove oven
US2387809A (en) * 1941-10-28 1945-10-30 Arnold L Rose Gas range
DE2446135A1 (de) * 1974-09-27 1976-04-15 Delbrouck Franz Fa Bausatz fuer kuehlmoebel
FR2369932A1 (fr) * 1976-11-05 1978-06-02 Isotecnica Spa Panneau sandwich thermo-isolant compose par une tole, une couche de materiau expanse et un enduit de mortier
EP0110143A1 (de) * 1982-10-29 1984-06-13 COMPAGNIE EUROPEENNE POUR L'EQUIPEMENT MENAGER "CEPEM" Société anonyme dite: Gerät mit Kochraum
US6224179B1 (en) * 1995-05-31 2001-05-01 Bsh Bosch Und Siemens Hausgeraete Gmbh Heat-insulating housing as well as a household oven and a household refrigerator having the housing
US6257684B1 (en) * 1997-10-16 2001-07-10 Bsh Bosch Und Siemens Haus-Geraete Gmbh Heat insulation wall
JPH11241428A (ja) * 1998-02-23 1999-09-07 Mitsubishi Heavy Ind Ltd 保温パネル
DE10046924A1 (de) * 2000-09-21 2002-04-18 Bsh Bosch Siemens Hausgeraete Wärmeisolierendes Gehäuse
EP1302144A2 (de) * 2001-10-15 2003-04-16 Whirlpool Corporation Gekühlter Ofen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2484982A1 (de) * 2011-02-08 2012-08-08 Electrolux Home Products Corporation N.V. Backofen mit wärmeisoliertem Ofeninnenraum
US12025258B2 (en) 2018-12-19 2024-07-02 Dow Global Technologies Llc Bonded multilayer article

Also Published As

Publication number Publication date
FR2893391B1 (fr) 2008-06-06
FR2893391A1 (fr) 2007-05-18

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