EP0504355B1 - Ensemble de cuisson pour cuisiniere ou table de cuisson, comportant au moins un bruleur a gaz - Google Patents

Ensemble de cuisson pour cuisiniere ou table de cuisson, comportant au moins un bruleur a gaz Download PDF

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Publication number
EP0504355B1
EP0504355B1 EP91917545A EP91917545A EP0504355B1 EP 0504355 B1 EP0504355 B1 EP 0504355B1 EP 91917545 A EP91917545 A EP 91917545A EP 91917545 A EP91917545 A EP 91917545A EP 0504355 B1 EP0504355 B1 EP 0504355B1
Authority
EP
European Patent Office
Prior art keywords
burner
cooking
radiant
fact
assembly according
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
EP91917545A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0504355A1 (fr
Inventor
Georges Le Strat
Michel Lefebvre
Michel Emont
Bernard Logel
Robert Strasser
Claude Valentin
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.)
Compagnie Europeenne pour lEquipement Menager SA
Butagaz SAS
Original Assignee
Compagnie Europeenne pour lEquipement Menager SA
Butagaz 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 Compagnie Europeenne pour lEquipement Menager SA, Butagaz SAS filed Critical Compagnie Europeenne pour lEquipement Menager SA
Publication of EP0504355A1 publication Critical patent/EP0504355A1/fr
Application granted granted Critical
Publication of EP0504355B1 publication Critical patent/EP0504355B1/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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • 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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/105—Porous plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/20—Burner material specifications metallic
    • F23D2212/201—Fibres

Definitions

  • the present invention relates to a cooking assembly for a stove or hob, of the type comprising a hob and at least one gas burner for heating a container placed above said gas burner.
  • Cooking sets using gas, natural or LPG burners have been known for a long time with the advantages they provide (flexibility, low inertia, immediate visibility of the settings), but also with their drawbacks (presence of a shaped grill frame, whose frequent cleaning is necessary, and whose aesthetics seem more and more outdated, even with the recent use of a molded glass plate on which are embedded the gas burners, as illustrated for example in documents US-A-3,592,180 and US-A-3,597,135).
  • Cooking assemblies using electric resistance plates have also been known for a long time, using no frame-shaped grate since the containers to be heated are placed directly on the heating plates, but with their drawbacks (high inertia, and adjustment difficult to view).
  • Such cooking sets are then fitted with perforated ceramic radiant burners (the ceramic material used has a honeycomb structure, optionally honeycomb and / or with surface craters making it possible to place the combustion flames in the cells of the ceramic).
  • the object of the invention is to design a cooking assembly, the design of which makes it possible to obtain the main advantages of the most recent electric cooking plate systems, while avoiding the drawbacks of known techniques as regards their inertia and their safety. .
  • the object of the invention is also to design a cooking assembly allowing the use of a ceramic glass hob, molded glass, or any other material compatible with technical and aesthetic requirements, such as agglomerates of mineral substances recently. developed, without having the risk of excessive heating of said plate and without confinement of atmosphere under it. while maintaining a satisfactory and aesthetic exterior appearance.
  • the table of this appliance is made of metallic material and not of ceramic glass.
  • the invention proposes a cooking assembly for a cooker or hob, comprising a hob made of glass-ceramic material or the like and at least one radiant gas burner for heating a container, characterized in that said hob has an opening associated with said gas burner to allow direct action of said gas burner through said opening when this burner is used, and in that this gas burner is a radiant burner with a fibrous metallic structure, the upper face of which is essentially flat and is flush with the upper plane of the hob, said radiant burner being arranged so as to close the associated opening.
  • the radiant burner with a fibrous metallic structure is removable for cleaning, the mounting and dismounting of said radiant burner being carried out at least in part by rotation of the latter.
  • a helical spring to be associated with the radiant burner with a fibrous metallic structure, by being compressed when said radiant burner is in the operating position, so as to facilitate the emergence of said radiant burner during disassembly thereof.
  • the cooking plate has salient reliefs organized around the opening associated with the radiant burner with a fibrous metallic structure to support the container to be heated above the upper face of said radiant burner; in particular, the protruding reliefs are undulations or grooves of a piece with the cooking plate, said cooking plate preferably being made of molded glass or glass-ceramic, or else of a solid material consisting of mineral substances coated with an organic polymer binder.
  • the upper face of the radiant burner with a fibrous metallic structure has protruding reliefs for supporting the container to be heated above said upper face.
  • the protruding reliefs are grooves, ribs, or the like, or curved studs, which curved studs are integrated into the radiant burner with a fibrous metallic structure or to the support of said radiant burner, or even attached and removable.
  • the upper face of the radiant burner with a fibrous metallic structure is in one piece, so that said face constitutes a single radiant surface, active in its entirety.
  • the upper face of the radiant burner with a fibrous metallic structure comprises a plurality of separate radiant surfaces flush with the level of the upper face of a common support; in particular, the disjointed radiant surfaces, when viewed from above, have an elongated shape, and are preferably arranged parallel to a common direction.
  • the common support closes the opening associated with the radiant burner by covering the edge of said opening, and is connected, preferably by a bayonet system, to a fixed box disposed under the hob, coaxially with said opening, said fixed box forming an air / gas mixing chamber common to all the separate radiant surfaces.
  • the aforementioned common support will for example be a metal block, preferably protected externally by a coating.
  • each radiant burner with a fibrous metallic structure is supplied with air by an associated fan, this air inducing the gas necessary for the preparation of the mixture via a venturi at the level of the neck of which the gas is injected.
  • the cooking assembly for stove or hob which will be described is of the type comprising a cooking plate and at least one gas burner for heating a container placed above said burner, said cooking plate having an associated opening to said gas burner to allow direct action of said burner through said opening when this burner is used.
  • At least one of the gas burners is a radiant burner with a fibrous metallic structure, the upper face of which is essentially flat and flush with the upper plane of the hob, said burner radiant being arranged to close the associated opening.
  • a cooking plate is thus distinguished comprising an opening 4 associated with a radiant burner 100 with a fibrous metallic structure. whose upper face 101, here essentially flat, is flush with the upper plane P of the cooking plate 1.
  • the radiant burner 100 thus closes the associated opening 4 of the cooking plate 1.
  • the cooking plate 1 has salient reliefs 2, 3 organized around the associated opening 4 , to support the container to be heated above the upper face 101 of the radiant burner 100.
  • the projecting reliefs 2, 3 may be corrugations or grooves, or projecting pins, which are preferably in one piece with the hob 1, which is advantageously made of molded glass or glass ceramic, or of a solid material consisting of mineral substances coated with an organic polymer binder, such as the material sold under the brand CORIAN® by the company Du Pont de Nemours.
  • protruding reliefs may alternatively be provided on the radiant burner itself, which allows on the one hand to preserve the flatness of the hob and therefore facilitate its manufacture in molded glass, glass ceramic, or material agglomerated of mineral substances, and on the other hand to use small containers on large diameter burners.
  • Such a variant is illustrated in FIG. 2, where there are reliefs 2 ′, 3 ′ projecting above the upper face 101 of the radiant burner 100, these reliefs being able to be undulations, grooves, radial ribs or not. , or also protruding pins or domed studs, which are preferably in one piece with the upper part of the radiant burner, but can also be added and dismantled.
  • An embodiment with curved studs will be described later with reference to FIGS. 5 and 6.
  • the radiant burner 100 with a fibrous metallic structure When the radiant burner 100 with a fibrous metallic structure is used, we find the advantages of the gas solution mentioned above, with in particular all the benefit of convection in the transfer of thermal energy.
  • the upper face of said burner which is flush with the upper plane P of the cooking plate 1, forms a closure cover completing the plane of this cooking plate, completely masking each opening 4 corresponding, so that the cooking assembly externally has the appearance of a unitary cooking plate, with all the ease of cleaning which results therefrom, as in the case of the ceramic hobs of known cooking sets.
  • the elevation of the containers relative to the surface of the hob allows the evacuation of the combustion products, the evacuation taking place here in the open air unlike the known solutions using burners with perforated ceramic gas which directly heat a ceramic hob, and therefore have a confined atmosphere under said hob.
  • the protruding reliefs may have a height of a few millimeters, so as not to alter the uniform appearance of the upper face of the hob or the radiant burner as the case may be, and their shapes. can be very variable. insofar as these do not make it possible to channel the overflows to said radiant burner. In general, we will prefer rounded shapes, as illustrated in Figures 1 and 2, with large radii of curvature, which facilitates cleaning of the hob or the radiant burner.
  • the flame causes the water to evaporate and any organic products to be burned (self-cleaning by pyrolysis).
  • the overflow affects a stationary radiant burner, the liquid products dirty the upper face of this burner. It may then be advantageous to be able to dismantle the burner to wash it more easily (or possibly replace it).
  • the radiant burner 100 with a fibrous metallic structure will therefore be removable, and its assembly and disassembly will be done at least in part by rotation of the latter.
  • the radiant burner 100 with a fibrous metallic structure can be screwed directly onto the cooking plate 1, the associated opening 4 then having a thread corresponding to the external thread provided laterally on said radiant burner.
  • This solution (not illustrated here) is however delicate to implement in the measurement or obtaining such a thread on a plate made of a material such as glass-ceramic remains delicate: one may then prefer one of the solutions illustrated on Figures 3a to 3c.
  • the radiant burner 100 is screwed by means of an insert 7 to the cooking plate 1.
  • the insert 7, which can be metallic, ceramic, or any other suitable material, is molded or glued to the baking sheet 1. It is here in the form of an L-section ring, internally threaded in correspondence with an external thread provided laterally on the radiant burner 100: the associated opening 4 then has a smooth edge , and it avoids having to make a thread of the cooking plate at the level of said opening.
  • the radiant burner 100 has a lower extension 107 externally threaded, for screwing onto a threaded well 9 secured to the bottom (F) of the cooking assembly: the same advantage is found as previously in that the edge of opening 4 can be smooth. It may prove advantageous, if necessary, to provide a seal 8 made of a material resistant to high temperature to complete the seal when the radiant burner is screwed in for its operating position.
  • the radiant burner 100 is connected by a bayonet or inclined ramp system to a separate piece placed under the cooking plate 1, coaxially with the axis 10 of the associated opening 4.
  • the burner 100 is here received in a fixed casing 102 having lugs 103 projecting inward, said lugs being received in associated slots 104 formed at the periphery of the radiant burner 100.
  • the slots 104 are essentially horizontal (in part), in accordance with a bayonet-type connection, so that it is advantageous to provide a helical spring 106 housed between the bottom 105 of the fixed housing 102 and the lower part of the radiant burner 100, said spring being compressed when said burner is mounted in the operating position.
  • the above-mentioned fixed casing can advantageously simultaneously form the air / gas mixing chamber of the radiant burner 100 with a fibrous metallic structure.
  • Locking in the operating position can be done by snap-fastening or by a ball system, or by any equivalent means (not shown here).
  • FIGS 1 to 3c which have just been described were used to illustrate the installation of radiant burners with a fibrous metal structure in the cooking plate, and their method of attachment (with a possible possibility of dismantling), the structure proper of the active part of the radiant burners being only shown schematically.
  • radiant metal fiber burners are very advantageous insofar as a significant part of the energy (20 to 30%) is directly transmitted in radiant form, which considerably improves the efficiency of cooking of such burners, and where the mechanical resistance is very high (especially if the fibers are sintered), which makes it possible to withstand thermal shock (in the event of liquid or solid overflow) and household cleaning (by scraping or otherwise), unlike the perforated ceramic gas burners mentioned above.
  • the metal fiber material also has very low thermal inertia due to the conductivity of the fibers and the high porosity. The amount of heat accumulated is small. and it is very easily restored.
  • the entire surface in contact with the combustion products should offer the same quality: an insulating coating resistant to high temperature can then constitute an acceptable solution when the fibrous material does not cover all the burner surface. Care should also be taken to avoid thermal bridges to prevent unfavorable conduction between the combustion surface and the combustion chamber: this will allow additional thermal protection to be provided at the peripheral zones which are packed to secure the burner, and possibly also upstream protection on the burner areas not covered with fibrous material.
  • Such metallic fibrous burners can operate either in radiant mode (surface combustion incandescent carrying the most superficial fibers), or in blue flame mode when the speed of circulation of the air-gas mixture in the porous medium becomes higher than the speed of flame spread of the same mixture. To obtain this operating mode, it is possible either to increase the surface power admitted to the burners, or to decrease the propagation speed by modifying the air / gas ratio. In radiant mode, such burners emit little NOx oxides (20 to 40 ppm in stoichiometric combustion for 200 to 400 ppm in a conventional burner).
  • metal fibers made from a material sold under the brand FECRALLOY®, 22 microns in diameter and 4 mm in length will be used, fibers which are randomly arranged parallel to the support plane and then compressed and sintered to provide a material with a porosity between 80 and 85%, and an extremely low variation in porosity.
  • other refractory alloys may be used to make the fibrous material, or certain equivalent ceramic fibers.
  • the finished material is then in the form of a layer with a thickness of between 1 and 4 mm, a thickness of 2 mm having a cost / performance compromise giving entirely satisfaction.
  • FIG. 4 illustrates in more detail a radiant burner 100 with a fibrous metallic structure, which comprises a burner body 150 supporting a thickness of fibrous material in the form of a plate 152 closing the air-gas mixing chamber 151.
  • the fibrous metallic layer 152 is fixed to the body 150 by any means, here shown schematically by a crimping ring 153, here in a T-shaped section, one wing of which covers the edge of the opening 4 of the cooking plate 1, with the interposition of a 153 ′ flat seal, for example made of silicone, ensuring the flexibility required for mounting and a perfect seal against overflows.
  • compression can be used by screwing on the cover, bonding with ceramic glue, riveting, stapling, or screwing.
  • a homogenization and distribution device device here schematically in the form of a grid 154, which allows a homogeneous supply over the entire rear face of the plate of fibrous material 152, avoiding the formation of preferential courses.
  • the radiant burner previously described with reference to FIG. 4 indeed has an upper face 101 in one piece (plate 152), so that said face constitutes a single radiant surface, active in its entirety.
  • FIGS. 5 to 7, FIGS. 8 and 9 illustrating the associated burner body.
  • a radiant burner 100 with a fibrous metallic structure can be distinguished, the upper face 101 of which has a plurality of disjointed radiant surfaces, thanks to plates 152 ′ (here thirteen plates) flush with the upper face 101 ′ d ' a common support 160.
  • the common support 160 has below a projecting edge 165 allowing mounting of the bayonet type on the burner body 150, by cooperating with the homologous projections 169 of said body.
  • a peripheral groove 167 is provided on the housing body 150, so as to have a seal 168 which ensures, in addition to the gas tightness of the chamber 151, a backlash at the level of the bayonet coupling connection (the seal 168 is slightly compressed during assembly to maintain a spring effect to guarantee this backlash).
  • the burner body 150 made of metal or plastic compatible with the material of the common support (compatibility both thermal and mechanical for relative sliding), rests by its bottom 166 on the bottom F of the cooking assembly , possibly with the interposition of a thin fibrous mattress (not shown here) used for thermal insulation and possibly also contributing to backlash.
  • the burner body 150 simultaneously defines the chamber 151 of the air / gas mixture of the radiant burner, said mixture arriving via a side inlet 155, said chamber communicating directly with a lower central space 162 of the common support 160 into which open elongated openings 161 formed in the upper wall of said common support.
  • These elongated openings 161 have a shoulder 163 on the upper side allowing the plates 152 ′ of fiber material to be supported.
  • the plates 152 ′ are thus flush with the essentially flat upper face 101 ′ of the common support 160, which upper face is extended radially by a slightly curved peripheral edge 101 ⁇ covering the edge of the opening 4 of the cooking plate 1
  • the common support 160 is supported on the cooking plate 1 by the lower face 164 of its peripheral edge 101 ⁇ , with the interposition of a flat seal 164 ′ preferably made of silicone, which guarantees both a perfect seal against overflows and flexibility to take up play.
  • the disjointed radiant surfaces 152 ′ have, when viewed from above, an elongated shape, and are preferably arranged parallel to a common direction A. It goes without saying, however, that it will be possible to use different shapes and / or arrangements for these separate radiant surfaces.
  • the common support 160 is for example constituted by a metal block, advantageously coated with an outer protective layer.
  • domed studs 2 ⁇ , 3 ici here with two central studs 2 ⁇ and four peripheral studs 3 ⁇ , making it possible to raise the container to be heated by a few millimeters, these domed studs being here integrated into said common support.
  • the plates 152 ′ will have a length of around 40 to 60 mm, a width of around 8 to 10 mm, and a thickness of about 2 mm, and the domed studs will protrude 5 to 8 mm above the plane of the upper face of the radiant burner.
  • FIG. 10 schematically illustrates an advantageous mode of supplying a radiant burner of the cooking assembly according to the invention.
  • a gas supply line 300 is thus distinguished, equipped with a regulator 301, and opening into a venturi 302; the air is supplied by a pipe 304 by means of a fan 303.
  • each radiant burner 100 is supplied with air by an associated fan 303, and the air (produced by the associated venturi 302) induced via the venturi at level of the neck thereof the gas necessary for the preparation of the mixture.
  • the gas pressure is regulated by the associated regulator 301, which is preferably controlled, by means of a loop 305, by the pressure of the air-gas mixture which is finally brought by line 306 to the radiant burner 100.
  • the fan control 303 which makes it possible to vary the air flow and therefore the power of the burner, can be done by an associated electric variator: this makes it possible to eliminate the presence of electric or electro-mechanical actuators, and to equip all of cooking sensitive touches.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Gas Burners (AREA)
  • Cookers (AREA)
  • Electric Stoves And Ranges (AREA)
EP91917545A 1990-10-01 1991-09-26 Ensemble de cuisson pour cuisiniere ou table de cuisson, comportant au moins un bruleur a gaz Expired - Lifetime EP0504355B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9012060 1990-10-01
FR9012060A FR2667384A1 (fr) 1990-10-01 1990-10-01 Ensemble de cuisson pour cuisiniere.
PCT/FR1991/000752 WO1992006334A1 (fr) 1990-10-01 1991-09-26 Ensemble de cuisson pour cuisiniere ou table de cuisson, comportant au moins un bruleur a gaz

Publications (2)

Publication Number Publication Date
EP0504355A1 EP0504355A1 (fr) 1992-09-23
EP0504355B1 true EP0504355B1 (fr) 1994-12-07

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ID=9400799

Family Applications (2)

Application Number Title Priority Date Filing Date
EP91917545A Expired - Lifetime EP0504355B1 (fr) 1990-10-01 1991-09-26 Ensemble de cuisson pour cuisiniere ou table de cuisson, comportant au moins un bruleur a gaz
EP91917312A Expired - Lifetime EP0503038B1 (fr) 1990-10-01 1991-09-26 Ensemble de cuisson pour cuisiniere ou table de cuisson, comportant au moins un generateur de chaleur integre

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP91917312A Expired - Lifetime EP0503038B1 (fr) 1990-10-01 1991-09-26 Ensemble de cuisson pour cuisiniere ou table de cuisson, comportant au moins un generateur de chaleur integre

Country Status (9)

Country Link
US (2) US5313049A (enrdf_load_stackoverflow)
EP (2) EP0504355B1 (enrdf_load_stackoverflow)
JP (2) JPH05503767A (enrdf_load_stackoverflow)
AT (1) ATE115268T1 (enrdf_load_stackoverflow)
AU (2) AU8658991A (enrdf_load_stackoverflow)
DE (2) DE69101054D1 (enrdf_load_stackoverflow)
ES (2) ES2066478T3 (enrdf_load_stackoverflow)
FR (1) FR2667384A1 (enrdf_load_stackoverflow)
WO (2) WO1992006334A1 (enrdf_load_stackoverflow)

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EP1934532A1 (en) 2005-09-30 2008-06-25 Indesit Company S.p.A. Cooking top with gas burner comprising a semi-permeable element

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1934532A1 (en) 2005-09-30 2008-06-25 Indesit Company S.p.A. Cooking top with gas burner comprising a semi-permeable element
EP2182293A1 (en) 2005-09-30 2010-05-05 Indesit Company S.p.A. Cooking top with gas burner comprising a semi-permeable element

Also Published As

Publication number Publication date
ATE115268T1 (de) 1994-12-15
AU8619691A (en) 1992-04-28
US5259361A (en) 1993-11-09
FR2667384A1 (fr) 1992-04-03
ES2066478T3 (es) 1995-03-01
EP0503038B1 (fr) 1994-01-19
ES2048598T3 (es) 1994-03-16
JPH05503766A (ja) 1993-06-17
WO1992006334A1 (fr) 1992-04-16
EP0504355A1 (fr) 1992-09-23
WO1992006335A1 (fr) 1992-04-16
EP0503038A1 (fr) 1992-09-16
DE69105714D1 (de) 1995-01-19
DE69101054D1 (de) 1994-03-03
JPH05503767A (ja) 1993-06-17
FR2667384B1 (enrdf_load_stackoverflow) 1995-05-05
AU8658991A (en) 1992-04-28
US5313049A (en) 1994-05-17

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