US20050188982A1 - Food cooking oven - Google Patents

Food cooking oven Download PDF

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Publication number
US20050188982A1
US20050188982A1 US10/513,497 US51349704A US2005188982A1 US 20050188982 A1 US20050188982 A1 US 20050188982A1 US 51349704 A US51349704 A US 51349704A US 2005188982 A1 US2005188982 A1 US 2005188982A1
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United States
Prior art keywords
enclosure
burner
oven
burning
plate
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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.)
Abandoned
Application number
US10/513,497
Inventor
Robert Bujeau
Michel Foray
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Premark FEG LLC
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Premark FEG LLC
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 Premark FEG LLC filed Critical Premark FEG LLC
Assigned to PREMARK FEG L.L.C. reassignment PREMARK FEG L.L.C. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FORAY, MICHEL G., BUJEAU, ROBERT F.
Publication of US20050188982A1 publication Critical patent/US20050188982A1/en
Abandoned 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
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation

Definitions

  • the present invention relates to ovens for cooking food.
  • the invention relates to an oven for cooking food that comprises:
  • Ovens of this type are already known in which, for example, the food for cooking is placed on trays disposed at a plurality of levels. In such ovens, the food must all cook at the same speed and with the same degree of cooking at all of the levels. It is therefore particularly important to ensure that heat is distributed uniformly within such ovens.
  • a particular object of the present invention is to improve the uniformity with which heat is distributed within the enclosure of an oven of this type.
  • an oven which, in addition to the characteristics mentioned above, is characterized by the fact that the heater device is placed facing the central space situated inside the circular path.
  • the heat produced by the heater device is sucked in by the fan and then distributed around it in uniform manner. This contributes to considerably improving the distribution of heat throughout the volume of the enclosure.
  • FIG. 1 is a diagrammatic perspective view of an embodiment of an oven of the invention
  • FIG. 2 is a diagrammatic section view of the oven shown in FIG. 1 , on the vertical plane perpendicular to its back wall, intersecting the back wall and the burner substantially in the middle;
  • FIG. 3 is a diagrammatic section in a plane analogous to that of FIG. 2 , showing the burner of the oven shown in FIGS. 1 and 2 ;
  • FIG. 4 is a diagrammatic plan view of the plate of the burner shown in FIGS. 2 and 3 ;
  • FIG. 5 is a diagrammatic front view of a variant of the protective grid which, in certain variants of the oven of the invention, serves to protect its burner and its fan;
  • FIG. 6 is a diagrammatic section view through the protective grid shown in FIG. 5 .
  • the oven 1 of the invention comprises an enclosure 2 contained in a casing 3 .
  • the casing 3 has means 4 for regulating temperature inside the enclosure 2 , and a door 5 for inserting food into the enclosure 2 .
  • the enclosure 2 is substantially in the form of a rectangular parallelepiped having a front face 6 that is open or closed by the door 5 , a back wall 7 that is opposite the front wall 6 , two vertical side walls 8 between the front face 6 and the back wall 7 , and a bottom wall 9 and a ceiling 10 forming two horizontal walls.
  • the oven 1 of the invention also comprises a heater device 11 , a fan 12 , a protective grid 13 , and slideways 14 .
  • the fan 12 is mounted on the back wall 7 .
  • the heater device 11 is placed inside the enclosure 2 facing the fan 12 .
  • it is a burner for burning gas. It is fed with gas for burning by a duct 15 .
  • the burner is ignited by an electrode 16 that is powered electrically by a wire 17 penetrating into the burner via the duct 15 .
  • the burner is described in greater detail below with reference to FIGS. 3 and 4 .
  • the burner advantageously includes a flame control device 16 a, e.g. using ionization, that is connected to a control unit (not shown) by a wire 17 a.
  • the gas for burning is advantageously a mixture of air and gas and it is delivered to the burner at small positive pressure.
  • the fan 12 is constituted by a disk 18 centered on an axis of rotation 19 .
  • the fan 12 has a plurality of blades 20 that are regularly distributed angularly around the axis of rotation 19 .
  • the blades 20 are constituted, for example, by plane rectangular plates extending in planes that are substantially perpendicular to the disk 18 and that include the axis of rotation 19 . While they are being rotated, they follow a circular path centered on the axis of rotation 19 and defining a central space 21 .
  • the fan 12 is rotated about the axis of rotation 19 by a motor 22 , e.g. an electric motor. It serves to distribute the heat energy within the enclosure 2 .
  • the protective grid 13 extends in a vertical plane facing the disk 18 , in front of the burner 11 and the fan 12 , relative to the space 23 that is to receive the food to be heated and that is situated between the burner 11 and the door 5 .
  • Each side wall 8 has one of the slideways 14 of each pair. These slideways 14 enable trays to be supported, which in turn serve to carry the food that is to be heated and/or cooked.
  • the burner 11 is placed facing the central space 21 .
  • a portion of the burner 11 penetrates into the central space 21 .
  • the enclosure 2 includes an exhaust orifice 31 for exhausting gas contained inside the enclosure 2 .
  • the burner 11 comprises a bowl 24 and a plate 25 .
  • the bowl 24 and the plate 25 are made of brass.
  • the bowl 24 is connected to the feed duct 15 and it is closed by the plate 25 on the side of the burner 11 that faces towards the back wall 7 of the enclosure 2 .
  • the plate 25 is in the form of a ring with a central opening 26 which is extended, perpendicularly to the plate 25 to the bottom of the bowl 24 by a tube 27 .
  • the plate 25 is substantially 15 millimeters (mm) in thickness.
  • the zone of the ring that is situated between the central opening 26 and its periphery is pierced by orifices 28 that are regularly spaced apart on eight concentric circles A-H. These concentric circles have respective diameters of 66 mm, 74 mm, 82 mm, 90 mm, 98 mm, 106 mm, 114 mm, and 122 mm. On these circles, there are to be found respectively 32, 32, 40, 48, 48, 64, 64, and 64 orifices 28 .
  • Each orifice 28 has a diameter that is substantially equal to 2.4 mm.
  • the plate 25 includes a setback 29 having a depth that is substantially equal to 3 mm.
  • the orifices 28 are not directly flush with the surface of the plate 25 and they are thus protected in part from the turbulence generated by the fan 12 .
  • the shapes of the orifices 20 and of the setback 29 are adapted so that, under the effect of the fan 12 , the flames generated by burning the gas extend radially relative to the central opening 26 over 360°.
  • the plate 25 also has two passages 30 for the igniting electrode 16 and for the flame control device 16 a.
  • the burner of the invention can be varied in numerous ways without going beyond the ambit of the invention.
  • the enclosure 2 has a front face and a rear face each of which can be opened or closed by a door.
  • a fan 12 is mounted, for example, on at least one of the side walls 8 , and the heater device 11 is placed facing each fan 12 .
  • a plurality of fans and a plurality of burners are placed on the same wall.
  • the oven of the invention has a protective grid 13 of the kind shown in FIGS. 5 and 6 . Unlike the grid described above, this protective grid 13 is not restricted to an area corresponding to that facing the fan 12 .
  • the protective grid 13 is supported by a metal frame 40 .
  • the frame 40 extends over a major fraction of the opening in the internal cavity of the enclosure 2 in a plane parallel to the back wall 7 .
  • the dimensions of the frame 40 are substantially equal to or greater than the dimensions of the fan 12 .
  • the frame 40 may act as a reflector.
  • the frame 40 is held within the enclosure 2 by tabs 41 engaging the bottom 9 and the ceiling 10 .
  • the protective grid 13 and the frame 40 can be easily removed so as to be cleaned independently of the oven 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Electric Ovens (AREA)
  • Electric Stoves And Ranges (AREA)
  • Preparation Of Fruits And Vegetables (AREA)
  • Gas Burners (AREA)

Abstract

The invention relates to a food cooking oven comprising a chamber, a turbine which is used to agitate the atmosphere in the chamber and a heating device which is disposed at the centre of the turbine.

Description

  • The present invention relates to ovens for cooking food.
  • More particularly, the invention relates to an oven for cooking food that comprises:
      • an enclosure for receiving the food to be heated and for containing a cooking atmosphere, the enclosure having two horizontal walls forming respectively a bottom and a ceiling, interconnected by at least two vertical side walls, said enclosure being closed by at least one door that is also vertical;
      • a heater device placed inside the enclosure; and
      • a fan also placed inside the enclosure comprising at least one blade rotating about a central space, following a circular path centered on an axis of rotation in order to stir the cooking atmosphere heated by the heater device.
  • Ovens of this type are already known in which, for example, the food for cooking is placed on trays disposed at a plurality of levels. In such ovens, the food must all cook at the same speed and with the same degree of cooking at all of the levels. It is therefore particularly important to ensure that heat is distributed uniformly within such ovens.
  • A particular object of the present invention is to improve the uniformity with which heat is distributed within the enclosure of an oven of this type.
  • To this end, according to the invention, an oven is provided which, in addition to the characteristics mentioned above, is characterized by the fact that the heater device is placed facing the central space situated inside the circular path.
  • By means of these dispositions, the heat produced by the heater device is sucked in by the fan and then distributed around it in uniform manner. This contributes to considerably improving the distribution of heat throughout the volume of the enclosure.
  • In preferred embodiments of the invention, recourse may optionally be had to one or more of the following dispositions:
      • the axis of rotation is horizontal; thus, for example, the fan is mounted to rotate on one of the vertical walls of the enclosure;
      • the heater device is an electric element or a burner for burning gas;
      • in this last case, the burner comprises a bowl and a plate, the bowl being connected to a duct for feeding gas for burning, and being closed by the plate covering its face facing towards the wall of the enclosure on which the fan is mounted, the plate being provided with orifices for passing the gas for burning; the burner is thus oriented towards the wall of the enclosure on which the fan is mounted; thus, if the burner and the fan are protected merely by a simple grid, the heat generated by the burner is not emitted directly towards the food to be heated and/or cooked;
      • the orifices in the plate of the burner are adapted so that the flames generated by burning the gas for burning are distributed over 360° about the axis of rotation;
      • wires for electrically powering a device for lighting the gas of the burner pass within the feed duct; advantage is thus taken of the relatively low temperature that exists inside the feed duct, given that it is swept by the gas for burning, thereby protecting the electrical power supply wires contained therein;
      • the plate is provided with an igniter electrode and with a flame control device, e.g. operating by ionization; and
      • the oven includes a protective grid provided with a frame defining an opening of area greater than or substantially equal to the area of the fan when considered perpendicularly to the axis of rotation.
  • Other aspects, objects, and advantages of the invention will appear on reading the following description of an embodiment thereof.
  • The invention will also be better understood with the help of the drawings, in which:
  • FIG. 1 is a diagrammatic perspective view of an embodiment of an oven of the invention;
  • FIG. 2 is a diagrammatic section view of the oven shown in FIG. 1, on the vertical plane perpendicular to its back wall, intersecting the back wall and the burner substantially in the middle;
  • FIG. 3 is a diagrammatic section in a plane analogous to that of FIG. 2, showing the burner of the oven shown in FIGS. 1 and 2;
  • FIG. 4 is a diagrammatic plan view of the plate of the burner shown in FIGS. 2 and 3;
  • FIG. 5 is a diagrammatic front view of a variant of the protective grid which, in certain variants of the oven of the invention, serves to protect its burner and its fan; and
  • FIG. 6 is a diagrammatic section view through the protective grid shown in FIG. 5.
  • In the various figures, the same references are used to designate elements that are identical or similar.
  • An embodiment of the oven of the invention is described below with reference to FIGS. 1 to 4.
  • As shown in FIG. 1, the oven 1 of the invention comprises an enclosure 2 contained in a casing 3. The casing 3 has means 4 for regulating temperature inside the enclosure 2, and a door 5 for inserting food into the enclosure 2.
  • The enclosure 2 is substantially in the form of a rectangular parallelepiped having a front face 6 that is open or closed by the door 5, a back wall 7 that is opposite the front wall 6, two vertical side walls 8 between the front face 6 and the back wall 7, and a bottom wall 9 and a ceiling 10 forming two horizontal walls.
  • As shown in FIG. 2, the oven 1 of the invention also comprises a heater device 11, a fan 12, a protective grid 13, and slideways 14. The fan 12 is mounted on the back wall 7.
  • The heater device 11 is placed inside the enclosure 2 facing the fan 12. Advantageously it is a burner for burning gas. It is fed with gas for burning by a duct 15. The burner is ignited by an electrode 16 that is powered electrically by a wire 17 penetrating into the burner via the duct 15. The burner is described in greater detail below with reference to FIGS. 3 and 4.
  • The burner advantageously includes a flame control device 16 a, e.g. using ionization, that is connected to a control unit (not shown) by a wire 17 a.
  • The gas for burning is advantageously a mixture of air and gas and it is delivered to the burner at small positive pressure.
  • The fan 12 is constituted by a disk 18 centered on an axis of rotation 19. At the periphery of the disk 18, the fan 12 has a plurality of blades 20 that are regularly distributed angularly around the axis of rotation 19. The blades 20 are constituted, for example, by plane rectangular plates extending in planes that are substantially perpendicular to the disk 18 and that include the axis of rotation 19. While they are being rotated, they follow a circular path centered on the axis of rotation 19 and defining a central space 21. The fan 12 is rotated about the axis of rotation 19 by a motor 22, e.g. an electric motor. It serves to distribute the heat energy within the enclosure 2.
  • The protective grid 13 extends in a vertical plane facing the disk 18, in front of the burner 11 and the fan 12, relative to the space 23 that is to receive the food to be heated and that is situated between the burner 11 and the door 5.
  • Ten pairs of slideways 14 are disposed substantially horizontally on the side walls 8. Each side wall 8 has one of the slideways 14 of each pair. These slideways 14 enable trays to be supported, which in turn serve to carry the food that is to be heated and/or cooked.
  • The burner 11 is placed facing the central space 21. Advantageously, a portion of the burner 11 penetrates into the central space 21. The enclosure 2 includes an exhaust orifice 31 for exhausting gas contained inside the enclosure 2.
  • As shown in FIG. 3, the burner 11 comprises a bowl 24 and a plate 25. Advantageously the bowl 24 and the plate 25 are made of brass.
  • The bowl 24 is connected to the feed duct 15 and it is closed by the plate 25 on the side of the burner 11 that faces towards the back wall 7 of the enclosure 2.
  • As shown in FIG. 4, the plate 25 is in the form of a ring with a central opening 26 which is extended, perpendicularly to the plate 25 to the bottom of the bowl 24 by a tube 27. The plate 25 is substantially 15 millimeters (mm) in thickness. The zone of the ring that is situated between the central opening 26 and its periphery is pierced by orifices 28 that are regularly spaced apart on eight concentric circles A-H. These concentric circles have respective diameters of 66 mm, 74 mm, 82 mm, 90 mm, 98 mm, 106 mm, 114 mm, and 122 mm. On these circles, there are to be found respectively 32, 32, 40, 48, 48, 64, 64, and 64 orifices 28. Each orifice 28 has a diameter that is substantially equal to 2.4 mm.
  • The plate 25 includes a setback 29 having a depth that is substantially equal to 3 mm. As a result, the orifices 28 are not directly flush with the surface of the plate 25 and they are thus protected in part from the turbulence generated by the fan 12. The shapes of the orifices 20 and of the setback 29 are adapted so that, under the effect of the fan 12, the flames generated by burning the gas extend radially relative to the central opening 26 over 360°.
  • The plate 25 also has two passages 30 for the igniting electrode 16 and for the flame control device 16 a.
  • The burner of the invention can be varied in numerous ways without going beyond the ambit of the invention.
  • Thus, in a variant that is not shown, the enclosure 2 has a front face and a rear face each of which can be opened or closed by a door. Under such circumstances, a fan 12 is mounted, for example, on at least one of the side walls 8, and the heater device 11 is placed facing each fan 12.
  • In other variants, a plurality of fans and a plurality of burners are placed on the same wall.
  • In yet other variants, the oven of the invention has a protective grid 13 of the kind shown in FIGS. 5 and 6. Unlike the grid described above, this protective grid 13 is not restricted to an area corresponding to that facing the fan 12. The protective grid 13 is supported by a metal frame 40. The frame 40 extends over a major fraction of the opening in the internal cavity of the enclosure 2 in a plane parallel to the back wall 7. The dimensions of the frame 40 are substantially equal to or greater than the dimensions of the fan 12. Thus, the cooking atmosphere flows inside the enclosure 2 by being sucked towards the center of the fan 12 inside the frame 40, and then blown away at the periphery of the fan 12 outside the frame 40. The frame 40 may act as a reflector. By way of example, the frame 40 is held within the enclosure 2 by tabs 41 engaging the bottom 9 and the ceiling 10. In some variants, the protective grid 13 and the frame 40 can be easily removed so as to be cleaned independently of the oven 1.

Claims (8)

1. An oven for cooking food, the oven comprising:
an enclosure for receiving the food to be heated and for containing a cooking atmosphere, the enclosure having two horizontal walls forming respectively a bottom and a ceiling, interconnected by at least two vertical side walls, said enclosure being closed by at least one door that is also vertical;
a heater device placed inside the enclosure; and
a fan also placed inside the enclosure comprising at least one blade rotating about a central space, following a circular path centered on an axis of rotation in order to stir the cooking atmosphere heated by the heater device;
the oven whereby the heater device is placed facing the central space situated inside the circular path.
2. An oven according to claim 1, in which the axis of rotation is horizontal.
3. An oven according to claim, in which the heater device is a burner for burning gas.
4. An oven according to claim 3, in which the burner comprises a bowl and a plate, the bowl being connected to a duct for feeding gas for burning, and being closed by the plate covering its face facing towards the wall of the enclosure on which the fan is mounted, the plate being provided with orifices for passing the gas for burning.
5. An oven according to claim 4, in which the orifices in the plate of the burner are adapted so that the flames generated by burning the gas for burning are distributed over 3600 about the axis of rotation.
6. An oven according to claim 4, in which wires for electrically powering a device for lighting the gas of the burner pass within the feed duct.
7. An oven according to claim 4, in which the plate is provided with an igniter electrode and with a flame control device.
8. An oven according to claim 1, including a protective grid provided with a frame defining an opening of area greater than or substantially equal to the area of the fan when considered perpendicularly to the axis of rotation.
US10/513,497 2002-05-07 2003-05-07 Food cooking oven Abandoned US20050188982A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0205714A FR2839546B1 (en) 2002-05-07 2002-05-07 OVEN FOR COOKING FOOD
FR01/05714 2002-05-07
PCT/FR2003/001416 WO2003098117A1 (en) 2002-05-07 2003-05-07 Food cooking oven

Publications (1)

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US20050188982A1 true US20050188982A1 (en) 2005-09-01

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US10/513,497 Abandoned US20050188982A1 (en) 2002-05-07 2003-05-07 Food cooking oven

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US (1) US20050188982A1 (en)
EP (1) EP1502058B1 (en)
JP (1) JP2005524824A (en)
CN (1) CN1653300A (en)
AT (1) ATE385303T1 (en)
AU (1) AU2003260541B2 (en)
CA (2) CA2484063C (en)
DE (1) DE60318940T2 (en)
ES (1) ES2300605T3 (en)
FR (1) FR2839546B1 (en)
MX (1) MXPA04010794A (en)
WO (1) WO2003098117A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2891702B1 (en) * 2005-10-07 2007-12-21 Bourgeois Prod Coop DEVICE FOR HEATING AND PRODUCTION OF STEAM FOR OVEN
FR2970559A1 (en) * 2011-01-19 2012-07-20 Bourgeois HEATING DEVICE WITH MEANS FOR PRODUCING STEAM
KR101980539B1 (en) * 2012-12-21 2019-05-21 삼성전자주식회사 Gas Oven

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US6342262B1 (en) * 1998-12-30 2002-01-29 Menu System Ag Process and device for preparing meals
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US6410890B1 (en) * 2000-04-12 2002-06-25 Rational Ag Apparatus and method for cleaning the interior of a cooking device
US6488492B2 (en) * 2000-11-03 2002-12-03 Bic Corporation Multi-mode lighter
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US3590803A (en) * 1968-07-20 1971-07-06 Burger Eisenwerke Ag Food-treatment apparatus with gas-circulating means
US3744474A (en) * 1971-03-01 1973-07-10 Beatrice Foods Co Steam cooking apparatus and method
US3780721A (en) * 1971-04-30 1973-12-25 Burger Eisenwerke Ag Circulating-air oven with filter
US4295034A (en) * 1977-12-06 1981-10-13 Grossag Gmbh Hot air grill
US4415799A (en) * 1979-07-27 1983-11-15 Matsushita Electric Industrial Co., Ltd. Multi-function oven with control circuit for operation during fermentation of yeast containing product
US4369760A (en) * 1980-09-22 1983-01-25 Northland Aluminum Products, Inc. Portable oven air circulator
US4477706A (en) * 1982-07-19 1984-10-16 Control Data Corporation Combination microwave/convection and broiling oven
US4648377A (en) * 1986-05-01 1987-03-10 Hobart Corporation Gas convection oven and heat exchanger therefor
US4870254A (en) * 1986-05-15 1989-09-26 Kabushiki Kaisha Toshiba Hot air circulating cooker
US4671250A (en) * 1986-07-28 1987-06-09 Thermo Electron Corporation Direct-firing gas convection oven
US4813398A (en) * 1988-05-09 1989-03-21 Hobart Corporation Convection oven
US4926837A (en) * 1988-06-28 1990-05-22 New World Domestic Appliances Limited Cooking ovens
US5045671A (en) * 1989-05-19 1991-09-03 Rinnai Kabushiki Kaisha Oven using halogen lamps
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US5601070A (en) * 1996-06-17 1997-02-11 Middleby Marshall, Inc. Convection oven
US5768982A (en) * 1996-10-07 1998-06-23 Societe Cooperative De Production Bourgeois Convection steam oven
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US6488492B2 (en) * 2000-11-03 2002-12-03 Bic Corporation Multi-mode lighter
US20040187857A1 (en) * 2001-07-21 2004-09-30 Raymond Violi Forced convection gas oven

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Publication number Publication date
DE60318940T2 (en) 2009-01-29
CA2625276A1 (en) 2003-11-27
FR2839546A1 (en) 2003-11-14
CN1653300A (en) 2005-08-10
ES2300605T3 (en) 2008-06-16
AU2003260541B2 (en) 2006-08-24
MXPA04010794A (en) 2005-03-07
AU2003260541A1 (en) 2003-12-02
WO2003098117A1 (en) 2003-11-27
CA2625276C (en) 2011-01-04
CA2484063A1 (en) 2003-11-27
EP1502058B1 (en) 2008-01-30
EP1502058A1 (en) 2005-02-02
CA2484063C (en) 2009-04-07
JP2005524824A (en) 2005-08-18
DE60318940D1 (en) 2008-03-20
FR2839546B1 (en) 2006-09-22
ATE385303T1 (en) 2008-02-15

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