EP0504355B1 - Cooking assembly for cooker or cooking table having at least one gas burner - Google Patents

Cooking assembly for cooker or cooking table having at least one gas burner 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
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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.)
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EP91917545A
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German (de)
French (fr)
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EP0504355A1 (en
Inventor
Georges Le Strat
Michel Lefebvre
Michel Emont
Bernard Logel
Robert Strasser
Claude Valentin
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Compagnie Europeenne pour lEquipement Menager SA
Butagaz SAS
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Compagnie Europeenne pour lEquipement Menager SA
Butagaz SAS
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    • 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)

Abstract

PCT No. PCT/FR91/00753 Sec. 371 Date Jun. 1, 1992 Sec. 102(e) Date Jun. 1, 1992 PCT Filed Sep. 26, 1919 PCT Pub. No. WO92/06335 PCT Pub. Date Apr. 16, 1992.A cooking assembly for a cooker or a cooking top and comprises a cooking plate (1) and at least one heat generator (200) enabling a receptacle to be heated without coming directly into contact therewith. The cooking plate (1) includes an opening (4) associated with each heat generator (200) and enabling said generator to act directly, together with retractable closure means such as a moving plug (203) associated with each opening (4) to close said opening when the heat generator (200) is not in use, the moving plug (203) then being flush with the top surface (2) of the cooking plate (1), motorized means being provided for retracting said moving plug in order to unmask the heat generator so that it can be put into use. The invention is applicable to cooking assemblies for gas cookers and/or electric cookers having a cooking plate made of molded glass, of vitroceramic, or of agglomerated inorganic fibers.

Description

La présente invention concerne un ensemble de cuisson pour cuisinière ou table de cuisson, du type comportant une plaque de cuisson et au moins un brûleur à gaz permettant de chauffer un récipient disposé au-dessus dudit brûleur à gaz.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.

On connaît depuis longtemps les ensembles de cuisson utilisant des brûleurs à gaz, naturel ou GPL, avec les avantages qu'ils procurent (souplesse, faible inertie, visibilité immédiate des réglages), mais aussi avec leurs inconvénients (présence d'une grille en forme de cadre, dont le nettoyage fréquent est nécessaire, et dont l'esthétique paraît de plus en plus surannée, même avec l'utilisation récente d'une plaque en verre moulé sur laquelle sont encastrés les brûleurs à gaz, comme illustré par exemple dans les documents US-A-3 592 180 et US-A-3 597 135).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).

On connaît également depuis longtemps les ensembles de cuisson utilisant des plaques à résistances électriques, n'utilisant aucune grille en forme de cadre puisque les récipients à chauffer sont posés directement sur les plaques chauffantes, mais avec leurs inconvénients (grande inertie, et réglage difficile à visualiser).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).

Un changement important a été apporté avec l'apparition des plaques en vitrocéramique à lampes halogènes, car ces plaques bénéficient de deux avantages notables que sont la facilité de nettoyage (la surface de la plaque de cuisson est en effet plane sur sa totalité) et un aspect extérieur résolument nouveau conférant une allure plus moderne.An important change was made with the appearance of ceramic glass plates with halogen lamps, because these plates benefit from two notable advantages which are the ease of cleaning (the surface of the cooking plate is indeed flat on its entirety) and a decidedly new exterior appearance giving a more modern look.

Cependant ces systèmes présentent encore une souplesse limitée, et leur niveau de sécurité exige une conception sophistiquée. De plus, il reste nécessaire de veiller à ce que la plaque vitrocéramique ne soit pas portée à une température excessive, ce qui rend nécessaire la présence de dispositifs de sécurité (sondes thermiques et limiteurs de température) qui présentent l'inconvénient de limiter la puissance de chauffe.However, these systems still have limited flexibility, and their level of security requires a sophisticated design. In addition, it remains necessary to ensure that the ceramic hob is not not brought to an excessive temperature, which makes it necessary to have safety devices (thermal probes and temperature limiters) which have the disadvantage of limiting the heating power.

On a également cherché à rénover les cuiseurs à gaz en utilisant une plaque de cuisson vitrocéramique, comme illustré par exemple dans le document FR-A-2 282 604, et dans le document FR-A-2 351 359 qui se réfère au précédent.Attempts have also been made to renovate gas cookers by using a ceramic glass hob, as illustrated for example in document FR-A-2 282 604, and in document FR-A-2 351 359 which refers to the previous one.

De tels ensembles de cuisson sont alors équipés de brûleurs radiants en céramique perforée (le matériau céramique utilisé a une structure alvéolaire, éventuellement en nid d'abeille et/ou avec des cratères de surface permettant de plaquer les flammes de combustion dans les alvéoles de la céramique).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).

Cependant, la présence de brûleurs à gaz disposés sous la plaque vitrocéramique plane augmente encore l'inertie thermique, et fait chuter sensiblement le rendement. La chaleur transmise provient en effet dans ce cas presque exclusivement du rayonnement : les gaz de combustion sont piégés sous la plaque vitrocéramique, et doivent être évacués par des fentes ménagées en arrière de ladite plaque, de sorte qu'il n'y a pratiquement pas de chaleur transmise par convection. On perd ainsi presque complètement la possibilité de transmission de chaleur par convection, qui représente potentiellement environ les deux tiers de l'énergie thermique produite par les brûleurs à gaz. En outre, il est dans ce cas encore plus indispensable de veiller à éviter tout échauffement excessif de la plaque vitrocéramique, ce qui oblige à prévoir des limiteurs de température entre les brûleurs à gaz et ladite plaqué (la limitation à une température inférieure à environ 540°C doit être impérativement respectée, ce qui limite aussi les types de brûleurs utilisables, et interdit notamment le contact direct avec une flamme nue). Le confinement des gaz de combustion constitue ainsi une difficulté très difficile à surmonter, et limite en tout état de cause les possibilité d'utilisation : finalement, cette voie tendant à se rapprocher des solutions électriques ne conduit pas à des performances équivalentes aux lampes halogènes ou à l'induction.However, the presence of gas burners arranged under the flat ceramic glass plate further increases the thermal inertia, and significantly reduces the efficiency. In this case, the heat transmitted comes almost exclusively from radiation: the combustion gases are trapped under the ceramic hob, and must be evacuated by slots made behind the said hob, so that there is practically no heat transmitted by convection. This almost completely loses the possibility of convective heat transmission, which potentially represents around two-thirds of the thermal energy produced by gas burners. In addition, it is even more essential in this case to take care to avoid any excessive heating of the ceramic hob, which means that there must be temperature limiters between the gas burners and said plate (the limitation to a temperature below about 540 ° C must be strictly observed, which also limits the types of burners that can be used, and notably prohibits direct contact with an open flame). The confinement of combustion gases thus constitutes a very difficult difficulty to overcome, and in any event limits the possibility of use: ultimately, this path tending to approach electrical solutions does not lead to performance equivalent to halogen lamps or at induction.

On aurait pu tenter de pallier les inconvénients précités en disposant les brûleurs radiants en céramique perforée, non plus sous la plaque vitrocéramique comme c'est le cas dans les deux documents précités, mais au niveau même de ladite plaque alors ajourée au droit de ces brûleurs radiants, en vue d'une action directe desdits brûleurs. Mais cette solution serait en réalité impraticable, car il est bien connu que les brûleurs radiants en céramique perforée sont inadaptés à une exposition directe de leur surface du fait de leur fragilité mécanique et de leur vulnérabilité aux chocs thermiques : en effet, tout débordement liquide ou solide risquerait de détériorer (par choc thermique) et/ou de colmater le matériau alvéolaire, et de plus tout nettoyage ménager (par grattage ou autre) aurait pour effet d'altérer de manière irréversible la face supérieure du brûleur radiant en céramique perforée, ainsi que cela est d'ailleurs expressément mentionné dans le document FR-A-2 282 604 précité.We could have tried to overcome the aforementioned drawbacks by placing the perforated ceramic radiant burners, no longer under the ceramic hob as is the case in the two aforementioned documents, but at the same level of said plate then perforated in line with these radiant burners, with a view to direct action of said burners. However, this solution would in reality be impractical, because it is well known that radiant perforated ceramic burners are unsuitable for direct exposure of their surface due to their mechanical fragility and their vulnerability to thermal shock: in fact, any liquid overflow or solid would risk deteriorating (by thermal shock) and / or clogging the foam material, and moreover any household cleaning (by scraping or other) would have the effect of irreversibly altering the upper face of the perforated ceramic radiant burner, thus that this is moreover expressly mentioned in the document FR-A-2 282 604 cited above.

L'invention a pour objet de concevoir un ensemble de cuisson dont la conception permette d'obtenir les principaux avantages des systèmes électriques à plaque de cuisson les plus récents, tout en évitant les inconvénients des techniques connues en ce qui concerne leur inertie et leur sécurité.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. .

L'invention a aussi pour objet de concevoir un ensemble de cuisson permettant l'utilisation d'une plaque de cuisson en vitrocéramique, en verre moulé, ou tout autre matériau compatible avec les exigences techniques et esthétiques, tel que les agglomérés de substances minérales récemment mis au point, sans avoir le risque d'un échauffement excessif de ladite plaque et sans confinement d'atmosphère sous celle-ci. tout en conservant un aspect extérieur satisfaisant et esthétique.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.

On connaît déjà par le document US-3 027 936 un appareil de combustion comportant un brûleur radiant à gaz incorporé dans une table.Document US-3,027,936 already discloses a combustion appliance comprising a radiant gas burner incorporated in a table.

Néanmoins, la table de cet appareil est en matériau métallique et non en matériau vitrocéramique.However, the table of this appliance is made of metallic material and not of ceramic glass.

L'invention propose quant à elle un ensemble de cuisson pour cuisinière ou table de cuisson, comportant une plaque de cuisson en matériau vitrocéramique ou analogue et au moins un brûleur à gaz radiant permettant de chauffer un récipient, caractérisé en ce que ladite plaque de cuisson comporte une ouverture associée audit brûleur à gaz pour permettre une action directe dudit brûleur à gaz par ladite ouverture lorsque ce brûleur est utilisé, et en ce que ce brûleur à gaz est un brûleur radiant à structure métallique fibreuse, dont la face supérieure est essentiellement plane et affleure au niveau du plan supérieur de la plaque de cuisson, ledit brûleur radiant étant agencé de façon à obturer l'ouverture associée.The invention, for its part, 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.

Selon une caractéristique particulièrement avantageuse, le brûleur radiant à structure métallique fibreuse est démontable pour être nettoyé, le montage et le démontage dudit brûleur radiant se faisant au moins en partie par rotation de celui-ci.According to a particularly advantageous characteristic, 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.

Plusieurs variantes peuvent par exemple être envisagées :

  • . le brûleur radiant à structure métallique fibreuse est vissé directement sur la plaque de cuisson, l'ouverture associée présentant alors un filetage correspondant au filetage extérieur prévu latéralement sur ledit brûleur radiant ;
  • . le brûleur radiant à structure métallique fibreuse est vissé par l'intermédiaire d'un insert sur la plaque de cuisson, l'ouverture associée étant alors lisse, et ledit insert présentant intérieurement un filetage correspondant au filetage extérieur prévu latéralement sur ledit brûleur radiant ;
  • . le brûleur radiant à structure métallique fibreuse est vissé par sa portion inférieure sur un puits de vissage solidaire du fond dudit ensemble, un joint d'étanchéité résistant à haute température étant prévu entre l'ouverture associée et le bord latéral adjacent dudit brûleur radiant ;
  • . le brûleur radiant à structure métallique fibreuse est relié par un système à baîonnette ou à rampe inclinée à un boîtier fixe disposé sous la plaque de cuisson, coaxialement à l'ouverture associée ; de préférence alors, le boîtier fixe forme en même temps la chambre de mélange air/gaz du brûleur radiant à structure métallique fibreuse.
Several variants can for example be envisaged:
  • . the radiant burner with a fibrous metallic structure is screwed directly onto the cooking plate, the associated opening then having a thread corresponding to the external thread provided laterally on said radiant burner;
  • . the radiant burner with a fibrous metallic structure is screwed by means of an insert to the cooking plate, the associated opening then being smooth, and said insert having internally a thread corresponding to the external thread provided laterally on said radiant burner;
  • . the radiant burner with a fibrous metallic structure is screwed by its lower portion onto a screwing well secured to the bottom of said assembly, a high temperature resistant seal being provided between the associated opening and the adjacent lateral edge of said radiant burner;
  • . the radiant burner with a fibrous metallic structure is connected by a bayonet or inclined ramp system to a fixed box disposed under the hob, coaxially with the associated opening; preferably then, the fixed housing forms at the same time the air / gas mixing chamber of the radiant burner with a fibrous metallic structure.

Il est également intéressant qu'un ressort hélicoïdal soit associé au brûleur radiant à structure métallique fibreuse, en étant comprimé lorsque ledit brûleur radiant est en position de fonctionnement, de façon à faciliter l'émergence dudit brûleur radiant lors du démontage de celui-ci.It is also advantageous for 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.

Il est par ailleurs avantageux de pouvoir chauffer un récipient disposé au-dessus du brûleur radiant sans contact direct entre le fond dudit récipient et la face supérieure dudit brûleur radiant.It is also advantageous to be able to heat a container placed above the radiant burner without direct contact between the bottom of said container and the upper face of said radiant burner.

Pour cela, selon un premier mode d'exécution, la plaque de cuisson présente des reliefs saillants organisés autour de l'ouverture associée au brûleur radiant à structure métallique fibreuse pour supporter le récipient à chauffer au-dessus de la face supérieure dudit brûleur radiant ; en particulier, les reliefs saillants sont des ondulations ou cannelures d'une pièce avec la plaque de cuisson, ladite plaque de cuisson étant de préférence réalisée en verre moulé ou en vitrocéramique, ou encore en un matériau massif constitué par des substances minérales enrobées d'un liant en polymère organique.For this, according to a first embodiment, 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.

En variante, la face supérieure du brûleur radiant à structure métallique fibreuse présente des reliefs saillants pour supporter le récipient à chauffer au-dessus de ladite face supérieure.As a variant, 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.

Dans ce cas, les reliefs saillants sont des cannelures, nervures, ou analogues, ou encore des plots bombés, lesquels plots bombés sont intégrés au brûleur radiant à structure métallique fibreuse ou au support dudit brûleur radiant, ou encore rapportés et démontables.In this case, 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.

Selon une autre caractéristique de l'invention, la face supérieure du brûleur radiant à structure métallique fibreuse est d'une seule pièce, de façon que ladite face constitue une surface radiante unique, active dans sa totalité.According to another characteristic of the invention, 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.

En variante, la face supérieure du brûleur radiant à structure métallique fibreuse comporte une pluralité de surfaces radiantes disjointes affleurant au niveau de la face supérieure d'un support commun ; en particulier, les surfaces radiantes disjointes ont, en vue de dessus, une forme allongée, et sont de préférence disposées parallèlement à une direction commune.As a variant, 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.

De préférence alors. le support commun obture l'ouverture associée au brûieur radiant en recouvrant le bord de ladite ouverture, et est relié, de préférence par un système à baïonnette, à un boîtier fixe disposé sous la plaque de cuisson, coaxialement à ladite ouverture, ledit boîtier fixe formant une chambre de mélange air/gaz commune à toutes les surfaces radiantes disjointes.Preferably then. 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.

Le support commun précité sera par exemple un bloc métallique, de préférence protégé extérieurement par un revêtement.The aforementioned common support will for example be a metal block, preferably protected externally by a coating.

De préférence enfin, chaque brûleur radiant à structure métallique fibreuse est alimenté en air par un ventilateur associé, cet air induisant le gaz nécessaire à la confection du mélange via un venturi au niveau du col duquel est injecté le gaz.Preferably finally, 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.

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lumière de la description qui va suivre et des dessins annexés concernant des modes de réalisation particuliers, en référence aux figures où :

  • la figure 1 illustre en coupe une portion d'ensemble de cuisson conforme à l'invention, avec un brûleur à gaz réalisé sous forme d'un brûleur radiant à structure métallique fibreuse, et une plaque de cuisson présentant ici des cannelures saillant autour de l'ouverture qui est fermée par le brûleur radiant. ces cannelures permettant de supporter un récipient à chauffer (non représenté) au-dessus de la face supérieure dudit brûleur radiant ;
  • la figure 2 illustre une variante du mode de réalisation précédent, dans laquelle les reliefs (par exemple des cannelures) sont prévus sur la face supérieure du brûleur radiant à structure métallique fibreuse, la plaque de cuisson pouvant alors être plane autour de l'ouverture associée ;
  • les figures 3a à 3c illustrent, à plus grande échelle, différents modes d'exécution particuliers de l'ensemble de cuisson précèdent, dans lesquels le brûleur radiant est démontable, en étant vissé sur la plaque de cuisson par l'intermédiaire d'un insert (figure 3a), ou vissé sur le fond de l'ensemble de cuisson (figure 3b), ou encore relié par un système à baïonnette à un boîtier fixe disposé sous la plaque de cuisson, avec interposition d'un ressort de dégagement (figure 3c) ;
  • la figure 4 est une coupe plus détaillée du montage d'un brûleur radiant à fibres métalliques, avec son boîtier inférieur formant la chambre associée de mélange air/gaz, la face supérieure dudit brûleur radiant étant ici d'une seule pièce, pour constituer une surface radiante unique active dans sa totalité ;
  • la figure 5 illustre en coupe une autre variante, dans laquelle la face supérieure du brûleur radiant à structure métallique fibreuse comporte une pluralité de surfaces radiantes disjointes affleurant au niveau de la face supérieure d'un support commun qui est par exemple un bloc métallique ;
  • la figure 6 est une coupe du support commun précité, et la figure 7 est une vue de dessus de ce support commun, faisant apparaître un ensemble ici de treize surfaces radiantes, allongées et disjointes (la figure 6 étant une coupe selon VI-VI de la figure 7) ;
  • la figure 8 est une coupe du corps de brûleur associé au support commun précité, et la figure 9 est une vue de dessus de ce corps de brûleur (la figure 8 étant une coupe selon VIII-VIII de la figure 9) ;
  • la figure 10 est un schéma illustrant un mode préféré d'alimentation d'un brûleur radiant de l'ensemble de cuisson selon l'invention, avec une alimentation en air par ventilateur.
Other characteristics and advantages of the invention will appear more clearly in the light of the description which follows and of the appended drawings relating to particular embodiments, with reference to the figures in which:
  • FIG. 1 illustrates in section a portion of a cooking assembly in accordance with the invention, with a gas burner produced in the form of a radiant burner with a fibrous metallic structure, and a cooking plate having here grooves projecting around the opening which is closed by the radiant burner. these grooves for supporting a container to be heated (not shown) above the upper face of said radiant burner;
  • FIG. 2 illustrates a variant of the previous embodiment, in which the reliefs (for example grooves) are provided on the upper face of the radiant burner with a fibrous metallic structure, the baking plate then being able to be flat around the associated opening ;
  • Figures 3a to 3c illustrate, on a larger scale, different particular embodiments of the above cooking assembly, in which the radiant burner is removable, by being screwed onto the cooking plate by means of an insert (Figure 3a), or screwed onto the bottom of the cooking assembly (Figure 3b), or even connected by a bayonet system to a fixed box placed under the cooking plate, with interposition of a release spring (Figure 3c);
  • Figure 4 is a more detailed section of the mounting of a radiant burner with metal fibers, with its lower housing forming the associated chamber of air / gas mixture, the upper face of said radiant burner being here in one piece, to constitute a single radiant surface fully active;
  • FIG. 5 illustrates in section another variant, in which the upper face of the radiant burner with a fibrous metal structure comprises a plurality of disjointed radiant surfaces flush with the level of the upper face of a common support which is for example a metal block;
  • Figure 6 is a section of the aforementioned common support, and Figure 7 is a top view of this common support, showing a set here of thirteen radiant surfaces, elongated and disjointed (Figure 6 being a section along VI-VI of Figure 7);
  • Figure 8 is a section of the burner body associated with the aforementioned common support, and Figure 9 is a top view of this burner body (Figure 8 being a section along VIII-VIII of Figure 9);
  • Figure 10 is a diagram illustrating a preferred mode of supply of a radiant burner of the cooking assembly according to the invention, with an air supply by fan.

L'ensemble de cuisson pour cuisinière ou table de cuisson qui va être décrit est du type comportant une plaque de cuisson et au moins un brûleur à gaz permettant de chauffer un récipient disposé au-dessus dudit brûleur, ladite plaque de cuisson comportant une ouverture associée audit brûleur à gaz pour permettre une action directe dudit brûleur par ladite ouverture lorsque ce brûleur est utilisé.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.

Conformément à un aspect essentiel de l'invention, l'un au moins des brûleurs à gaz est un brûleur radiant à structure métallique fibreuse, dont la face supérieure est essentiellement plane et affleure au niveau du plan supérieur de la plaque de cuisson, ledit brûleur radiant étant agencé de façon à obturer l'ouverture associée.According to an essential aspect of the invention, 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.

Sur la figure 1, on distingue ainsi une plaque de cuisson comportant une ouverture 4 associée à un brûleur radiant 100 à structure métallique fibreuse. dont la face supérieure 101, ici essentiellement plane, affleure au niveau du plan supérieur P de la plaque de cuisson 1. Le brûleur radiant 100 obture ainsi l'ouverture associée 4 de la plaque de cuisson 1. Dans ce cas, si l'on veut pouvoir chauffer un récipient sans que le fond de celui-ci soit au contact de la face supérieure 101 du brûleur radiant 100 à structure métallique fibreuse, la plaque de cuisson 1 présente des reliefs saillants 2, 3 organisés autour de l'ouverture associée 4, pour supporter le récipient à chauffer au-dessus de la face supérieure 101 du brûleur radiant 100. Les reliefs saillants 2, 3 peuvent être des ondulations ou des cannelures, ou encore des picots saillants, qui sont de préférence d'une pièce avec la plaque de cuisson 1, laquelle est avantageusement réalisée en verre moulé ou en vitrocéramique, ou encore en un matériau massif constitué par des substances minérales enrobées d'un liant en polymère organique, tel que le matériau commercialisé sous la marque CORIAN® par la société Du Pont de Nemours.In FIG. 1, 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. In this case, if one wants to be able to heat a container without the bottom of it being in contact with the upper face 101 of the radiant burner 100 with a fibrous metallic structure, 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.

Ces reliefs saillants peuvent en variante être prévus sur le brûleur radiant lui-même, ce qui permet d'une part de préserver la planéité de la plaque de cuisson et donc d'en faciliter la fabrication en verre moulé, en vitrocéramique, ou en matériau aggloméré de substances minérales, et d'autre part d'utiliser des petits récipients sur des brûleurs de grands diamètres. Une telle variante est illustrée en figure 2, où l'on distingue des reliefs 2′, 3′ saillant au-dessus de la face supérieure 101 du brûleur radiant 100, ces reliefs pouvant être des ondulations, des cannelures, des nervures radiales ou non, ou encore des picots saillants ou plots bombés, qui sont de préférence d'une pièce avec la partie supérieure du brûleur radiant, mais peuvent aussi être rapportés et démontables. Un mode de réalisation avec plots bombés sera décrit plus loin en référence aux figures 5 et 6.These 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.

Lorsque le brûleur radiant 100 à structure métallique fibreuse est utilisé, on retrouve les avantages de la solution gaz cités plus haut, avec en particulier tout le bénéfice de la convection dans le transfert d'énergie thermique. Lorsque le brûleur radiant n'est pas utilisé, la face supérieure dudit brûleur, qui affleure au niveau du plan supérieur P de la plaque de cuisson 1, forme un couvercle de fermeture complétant le plan de cette plaque de cuisson, en masquant totalement chaque ouverture 4 correspondante, de sorte que l'ensemble de cuisson présente extérieurement l'aspect d'une plaque de cuisson unitaire, avec toute la facilité de nettoyage qui en découle, comme pour le cas des plaques de cuisson vitrocéramiques des ensembles de cuisson connus. Ainsi que cela a été expliqué plus haut, la surélévation des récipients par rapport à la surface de la plaque de cuisson permet l'évacuation des produits de combustion, I'évacuation se faisant ici à l'air libre contrairement aux solutions connues utilisant des brûleurs à gaz en céramique perforée qui chauffent directement une plaque de cuisson en vitrocéramique, et donc présentent une atmosphère confinée sous ladite plaque de cuisson. Dans la pratique, les reliefs saillants pourront présenter une hauteur de quelques millimètres, de façon à ne pas altérer l'aspect uniforme de la face supérieure de la plaque de cuisson ou du brûleur radiant selon le cas, et leurs formes pourront être très variables. dans la mesure où celles-ci ne permettent pas de canaliser les débordements vers ledit brûleur radiant. D'une façon générale, on préfèrera des formes arrondies, comme illustré aux figures 1 et 2, avec de grands rayons de courbure, ce qui facilite le nettoyage de la plaque de cuisson ou du brûleur radiant.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. When the radiant burner is not used, 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. As explained above, 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. In practice, 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.

En cas de débordement sur le brûleur en fonctionnement, la flamme provoque l'évaporation de l'eau et la combustion des produits organiques éventuellement présents (auto-nettoyage par pyrolyse). Cependant, si le débordement affecte un brûleur radiant à l'arrêt, les produits liquides viennent salir la face supérieure de ce brûleur. Il peut alors s'avérer intéressant de pouvoir démonter le brûleur pour le laver plus facilement (ou éventuellement le remplacer). De préférence, le brûleur radiant 100 à structure métallique fibreuse sera donc démontable, et son montage et son démontage se feront au moins en partie par rotation de celui-ci.In the event of an overflow on the burner in operation, the flame causes the water to evaporate and any organic products to be burned (self-cleaning by pyrolysis). However, if 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). Preferably, 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.

Le brûleur radiant 100 à structure métallique fibreuse peut être vissé directement sur la plaque de cuisson 1, l'ouverture associée 4 présentant alors un filetage correspondant au filetage extérieur prévu latéralement sur ledit brûleur radiant. Cette solution (non illustrée ici) est cependant délicate à mettre en oeuvre dans la mesure ou l'obtention d'un tel filetage sur une plaque en un matériau tel que la vitrocéramique reste délicate : on pourra alors préférer l'une des solutions illustrées sur les figures 3a à 3c.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.

Sur la figure 3a, le brûleur radiant 100 est vissé par l'intermédiaire d'un insert 7 sur la plaque de cuisson 1. L'insert 7, qui peut être métallique, en céramique, ou en tout autre matériau convenable, est moulé ou collé sur la plaque de cuisson 1. Il se présente ici sous la forme d'une bague à section en L, filetée intérieurement en correspondance avec un filetage extérieur prévu latéralement sur le brûleur radiant 100 : l'ouverture associée 4 présente alors un bord lisse, et on évite d'avoir à réaliser un filetage de la plaque de cuisson au niveau de ladite ouverture.In FIG. 3a, 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.

Sur la figure 3b, le brûleur radiant 100 présente une extension inférieure 107 filetée extérieurement, pour un vissage sur un puits taraudé 9 solidaire du fond (F) de l'ensemble de cuisson : on retrouve le même avantage que précédemment dans la mesure où le bord de l'ouverture 4 peut être lisse. II peut s'avérer avantageux, si nécessaire, de prévoir un joint 8 en matériau résistant à haute température pour parfaire l'étanchéité lorsque le brûleur radiant est vissé pour sa position de fonctionnement.In FIG. 3b, 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.

Sur la figure 3c, le brûleur radiant 100 est relié par un système à baïonnette ou à rampe inclinée à une pièce séparée disposée sous la plaque de cuisson 1, coaxialement à l'axe 10 de l'ouverture associée 4. Comme cela est visible sur la figure, le brûleur 100 est ici reçu dans un boîtier fixe 102 présentant des ergots 103 saillant vers l'intérieur, lesdits ergots étant reçus dans des fentes associées 104 ménagées à la périphérie du brûleur radiant 100. Les fentes 104 sont essentiellement horizontales (en partie), conformément à une liaison du type à baîonnette, de sorte qu'il est avantageux de prévoir un ressort hélicoïdal 106 logé entre le fond 105 du boîtier fixe 102 et la partie inférieure du brûleur radiant 100, ledit ressort étant comprimé lorsque ledit brûleur radiant est monté en position de fonctionnement. Ainsi, il suffit d'imprimer une légère rotation au brûleur radiant 100 pour que les ergots 103 parviennent à la partie verticale des fentes 104, le ressort hélicoîdal 106 réalisant alors l'émergence du brûleur radiant 100, ce qui facilite considérablement la préhension dudit brûleur lorsqu'on veut le démonter pour le nettoyer ou le remplacer.In FIG. 3c, 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. As can be seen on In the figure, 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. Thus, it suffices to print a slight rotation on the radiant burner 100 so that the lugs 103 reach the vertical part of the slots 104, the helical spring 106 then realizing the emergence of the radiant burner 100, which considerably facilitates the gripping of said burner when you want to take it apart to clean or replace it.

Ainsi que cela sera expliqué plus loin, le boîtier fixe précité peut avantageusement former en même temps la chambre de mélange air/gaz du brûleur radiant 100 à structure métallique fibreuse.As will be explained below, the above-mentioned fixed casing can advantageously simultaneously form the air / gas mixing chamber of the radiant burner 100 with a fibrous metallic structure.

Ces différentes solutions sont particulièrement simples, et préservent les exigences esthétiques qui interdisent toute aspérité pouvant servir de prise pour le démontage, tout en évitant de prévoir des ouvertures supplémentaires par où les débordements pourraient pénétrer. Le blocage en position de fonctionnement pourra se faire par encliquetage ou par un système à bille, ou par tout moyen équivalent (non représenté ici).These different solutions are particularly simple, and preserve the aesthetic requirements which prohibit any roughness that can serve as a socket for disassembly, while avoiding providing additional openings through which the overflows could penetrate. Locking in the operating position can be done by snap-fastening or by a ball system, or by any equivalent means (not shown here).

Les figures 1 à 3c qui viennent d'être décrites ont servi à illustrer l'implantation des brûleurs radiants à structure métallique fibreuse dans la plaque de cuisson, et leur mode de fixation (avec une éventuelle possibilité de démontage), la structure proprement dite de la partie active des brûleurs radiants étant seulement schématisée.Figures 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.

On va maintenant décrire plus en détail la structure des brûleurs radiants à structure métallique utilisés dans le cadre de l'invention.We will now describe in more detail the structure of radiant burners with a metal structure used in the context of the invention.

Il convient tout d'abord d'observer que les brûleurs radiants à fibres métalliques sont très intéressants dans la mesure où une partie importante de l'énergie (20 à 30 %) est directement transmise sous forme radiante, ce qui améliore considérablement le rendement de cuisson de tels brûleurs, et où la résistance mécanique est très élevée (surtout si les fibres sont frittées), ce qui permet de résister aux chocs thermiques (en cas de débordement liquide ou solide) et au nettoyage ménager (par grattage ou autre), contrairement aux brûleurs à gaz en céramique perforée mentionnés plus haut. Le matériau en fibres métalliques présente en outre une très faible inertie thermique grâce à la conductibilité des fibres et à la porosité élevée. La quantité de chaleur accumulée est faible. et elle est très aisément restituée. Pour bénéficier totalement de cet avantage, il convient cependant que l'ensemble de la surface en contact avec les produits de combustion offre la même qualité : un revêtement isolant résistant à haute température peut alors constituer une solution acceptable lorsque le matériau fibreux ne recouvre pas toute la surface du brûleur. Il convient également de veiller à éviter les ponts thermiques pour empêcher une conduction défavorable entre la surface de combustion et la chambre de combustion : on pourra ainsi prévoir une protection thermique supplémentaire au niveau des zones périphériques qui sont tassées pour assurer la fixation du brûleur, et éventuellement aussi une protection amont sur les zones du brûleur non recouvertes de matériau fibreux.First of all, it should be noted that 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. To fully benefit from this advantage, however, 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.

De tels brûleurs fibreux métalliques peuvent fonctionner soit en mode rayonnant (combustion de surface portant à incandescence les fibres les plus superficielles), soit en mode flamme bleue lorsque la vitesse de circulation du mélange air-gaz dans le milieu poreux devient supérieure à la vitesse de propagation de flamme du même mélange. Pour obtenir ce mode de fonctionnement, on peut soit augmenter la puissance surfacique admise aux brûleurs, soit diminuer la vitesse de propagation en modifiant le rapport air/gaz. En mode radiant, de tels brûleurs émettent peu d'oxydes NOx (20 à 40 ppm en combustion stoechiométrique pour 200 à 400 ppm dans un brûleur classique).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).

On utilisera par exemple des fibres métalliques réalisées à partir d'un matériau commercialisé sous la marque FECRALLOY® de 22 microns de diamètre et 4 mm de longueur, fibres qui sont disposées de manière aléatoire parallèlement au plan de support puis comprimées et frittées pour fournir un matériau de porosité comprise entre 80 et 85 %, et de variation de porosité extrêmement faible. On pourra en variante utiliser d'autres alliages réfractaires pour réaliser le matériau fibreux, ou certaines fibres céramiques équivalentes. Le matériau fini se présente alors sous la forme d'une couche d'épaisseur comprise entre 1 et 4 mm, une épaisseur de 2 mm présentant un compromis coût/performances donnant tout à fait satisfaction.For example, 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. Alternatively, 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.

On pourra d'ailleurs se référer au document EP-A-0 157 432, incorporé ici à titre de référence, dans lequel est décrit un matériau fibreux poreux métallique particulièrement bien adapté à la réalisation d'un brûleur à gaz du type précité. Un tel matériau fibreux permet en effet de réaliser des brûleurs dont la souplesse de réglage est élevée (rapport entre la puissance maximale et la puissance minimale supérieur à 4).Reference may also be made to document EP-A-0 157 432, incorporated here by way of reference, in which a porous metallic fibrous material is described which is particularly well suited to the production of a gas burner of the aforementioned type. Such a fibrous material indeed makes it possible to produce burners whose flexibility of adjustment is high (ratio between the maximum power and the minimum power greater than 4).

La figure 4 illustre plus en détail un brûleur radiant 100 à structure métallique fibreuse, qui comporte un corps de brûleur 150 supportant une épaisseur de matériau fibreux sous forme d'une plaque 152 fermant la chambre de mélange air-gaz 151. La couche métallique fibreuse 152 est fixée au corps 150 par tout moyen, ici schématisé par un anneau de sertissage 153, ici à section en forme de T, dont une aile recouvre le bord de l'ouverture 4 de la plaque de cuisson 1, avec interposition d'un joint plat 153′, par exemple en silicone, garantissant la souplesse requise pour le montage et une parfaite étanchéité aux débordements. On pourra en variante utiliser une compression par vissage de couvercle, un collage par colle céramique, un rivetage, un agrafage, ou un vissage. Il peut s'avérer également avantageux de prévoir un dispositif d'homogénéisation et de répartition, dispositif ici schématisé sous la forme d'une grille 154, qui permet une alimentation homogène sur toute la face arrière de la plaque de matériau fibreux 152, en évitant la formation de parcours préférentiels.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. Alternatively, compression can be used by screwing on the cover, bonding with ceramic glue, riveting, stapling, or screwing. It may also prove to be advantageous to provide 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.

Il est par ailleurs possible de moduler les surfaces chauffantes des brûleurs radiants utilisés en fonction de la puissance et du dimensionnement desdits brûleurs.It is also possible to modulate the heating surfaces of the radiant burners used as a function of the power and the size of said burners.

Le brûleur radiant précédemment décrit en référence à la figure 4 comporte en effet une face supérieure 101 d'une seule pièce (plaque 152), de façon que ladite face constitue une surface radiante unique, active dans sa totalité.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.

Il peut cependant s'avérer intéressant de diviser la surface radiante et d'utiliser une pluralité de surfaces radiantes disjointes, plus petites, formant chacune un sous-ensemble de brûleur, comme illustré aux figures 5 à 7, les figures 8 et 9 illustrant le corps de brûleur associé.It may however prove to be advantageous to divide the radiant surface and to use a plurality of disjoint, smaller radiant surfaces, each forming a burner sub-assembly, as illustrated in FIGS. 5 to 7, FIGS. 8 and 9 illustrating the associated burner body.

On distingue en effet sur ces figures un brûleur radiant 100 à structure métallique fibreuse dont la face supérieure 101 comporte une pluralité de surfaces radiantes disjointes, grâce à des plaquettes 152′ (ici treize plaquettes) affleurant au niveau de la face supérieure 101′ d'un support commun 160.In fact, in these figures, 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.

Le support commun 160 présente inférieurement un bord à saillies 165 permettant un montage du type à baïonnette sur le corps de brûleur 150, en coopérant avec les saillies homologues 169 dudit corps. Une gorge périphérique 167 est prévue sur le corps de boîtier 150, pour disposer un joint d'étanchéité 168 qui assure, outre l'étanchéité au gaz de la chambre 151, un rattrapage de jeu au niveau de la liaison d'accouplement à baïonnette (le joint 168 est légèrement comprimé au montage pour conserver un effet ressort permettant de garantir ce rattrapage de jeu). Le corps de brûleur 150, réalisé en métal ou en matière plastique compatible avec le matériau du support commun (compatibilité à la fois thermique, et mécanique pour le glissement relatif), repose par son fond 166 sur le fond F de l'ensemble de cuisson, avec éventuellement interposition d'un matelas fibreux de faible épaisseur (non representé ici) servant pour l'isolation thermique et contribuant éventuellement aussi au rattrapage de jeu. Le corps de brûleur 150 définit en même temps la chambre 151 de mélange air/gaz du brûleur radiant, ledit mélange arrivant par une entrée latérale 155, ladite chambre communiquant directement avec un espace central inférieur 162 du support commun 160 dans lequel débouchent des ouvertures allongées 161 pratiquées dans la paroi supérieure dudit support commun. Ces ouvertures allongées 161 présentent supérieurement un épaulement 163 permettant de supporter les plaquettes 152′ de matériau à fibres métalliques, dont les fibres sont de préférence frittées pour augmenter la résistance mécanique desdites plaquettes. Les plaquettes 152′ affleurent ainsi au niveau de la face supérieure essentiellement plane 101′ du support commun 160, laquelle face supérieure se prolonge radialement par un bord périphérique légèrement bombé 101˝ venant recouvrir le bord de l'ouverture 4 de la plaque de cuisson 1. Comme cela est visible sur la figure 5, le support commun 160 est en appui sur la plaque de cuisson 1 par la face inférieure 164 de son bord périphérique 101˝, avec interposition d'un joint plat 164′ réalisé de préférence en silicone, qui garantit à la fois une parfaite étanchéité aux débordements et une souplesse de rattrapage de jeu.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. metal, the fibers of which are preferably sintered to increase the mechanical resistance of said plates. 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 As can be seen in FIG. 5, 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.

Avec cette disposition, le mélange air/gaz arrivant par le conduit d'entrée 155 pénètre dans la chambre 151 qui est ainsi commune à toutes les surfaces radiantes disjointes 152′.With this arrangement, the air / gas mixture arriving through the inlet duct 155 enters the chamber 151 which is thus common to all the disjointed radiant surfaces 152 ′.

Ainsi que cela est mieux visible sur la figure 7, les surfaces radiantes disjointes 152′ ont, en vue de dessus, une forme allongée, et sont de préférence disposées parallèlement à une direction commune A. Il va de soi cependant que l'on pourra utiliser des formes et/ou des dispositions différentes pour ces surfaces radiantes disjointes.As can be seen more clearly in FIG. 7, 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.

Le support commun 160 est par exemple constitué par un bloc métallique, avantageusement revêtu d'une couche extérieure de protection.The common support 160 is for example constituted by a metal block, advantageously coated with an outer protective layer.

On notera également la présence sur la face supérieure du support commun 160 de plots bombés 2˝, 3˝, avec ici deux plots centraux 2˝ et quatre plots périphériques 3˝, permettant de surélever de quelques millimètres le récipient à chauffer, ces plots bombés étant ici intégrés audit support commun. On pourra en variante prévoir des plots bombés rapportés et démontables.We will also note the presence on the upper face of the common support 160 of 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. As an alternative, provision may be made for rounded and removable domed studs.

A titre indicatif, avec un support commun circulaire ayant un diamètre extérieur de l'ordre de 190 mm, les plaquettes 152′ auront une longueur de l'ordre de 40 à 60 mm, une largeur de l'ordre de 8 à 10 mm, et une épaisseur d'environ 2 mm, et les plots bombés sailleront de 5 à 8 mm au-dessus du plan de la face supérieure du brûleur radiant.As an indication, with a common circular support having an outside diameter of around 190 mm, 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.

La figure 10 illustre schématiquement un mode avantageux d'alimentation d'un brûleur radiant de l'ensemble de cuisson conforme à l'invention.FIG. 10 schematically illustrates an advantageous mode of supplying a radiant burner of the cooking assembly according to the invention.

On distingue ainsi une conduite 300 d'amenée de gaz, équipée d'un détendeur 301, et débouchant dans un venturi 302 ; l'air est amené par une conduite 304 au moyen d'un ventilateur 303. Ainsi, chaque brûleur radiant 100 est alimenté en air par un ventilateur 303 associé, et l'air (produit par le venturi associé 302) induit via le venturi au niveau du col de celui-ci le gaz nécessaire à la confection du mélange. La pression de gaz est réglée par le détendeur associé 301, lequel est de préférence piloté, grâce à une boucle 305, par la pression du mélange air-gaz qui est finalement amené par la conduite 306 au brûleur radiant 100. La commande du ventilateur 303, qui permet de faire varier le débit d'air et donc la puissance du brûleur, peut se faire par un variateur électrique associé : ceci permet de supprimer la présence d'actionneurs électriques ou électro-mécaniques, et d'équiper l'ensemble de cuisson de touches sensibles.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. Thus, 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.

Claims (21)

  1. A cooking assembly for a cooker or a cooking top, comprising a cooking plate of vitroceramic or the like and at least one radiant gas burner enabling a receptacle to be heated, characterized in that said cooking plate includes an opening associated with said gas burner to enable said gas burner to act directly through said opening when said burner is in use, and in that the gas burner (100) is a radiant burner having a metal fiber structure with its top face (101) being essentially plane and flush with the top surface (P) of the cooking plate (1), said radiant burner (100) being organized so as to close the associated opening (4).
  2. A cooking assembly according to claim 1, characterized by the fact that the metal fiber structure radiant burner (100) is dismountable for cleaning purposes, with mounting and dismounting of said radiant burner being performed at least in part by rotating said burner.
  3. A cooking assembly according to claim 2, characterized by the fact that the metal fiber structure radiant burner (100) is screwed directly to the cooking plate (1), the associated opening (4) being provided with a thread that corresponds to an outside thread provided on the side of said radiant burner.
  4. A cooking assembly according to claim 2, characterized by the fact that the metal fiber structure radiant burner (100) is screwed to the cooking plate (1) by means of an insert (7), the associated opening (4) then being smooth, and said insert having an inside thread that corresponds to an outside thread provided on the outside of said radiant burner.
  5. A cooking assembly according to claim 2, characterized by the fact that the metal fiber structure radiant burner (100) is screwed via its bottom end (107) to a screw well (9) secured to the bottom (F) of said assembly, a sealing ring (8) that withstands high temperature being provided between the associated opening (4) and the adjacent side wall of said radiant burner.
  6. A cooking assembly according to claim 2, characterized by the fact that the metal fiber structure radiant burner (100) is connected by means of a bayonet system or by means of a sloping ramp system to a stationary housing (102: 150) disposed beneath the cooking plate (1) coaxially with the associated opening (4).
  7. A cooking assembly according to claim 6, characterized by the fact that the stationary housing (150) simultaneously forms an air/gas mixture chamber (151) for the metal fiber structure radiant burner (100).
  8. A cooking assembly according to any one of claims 2 to 7, characterized by the fact that a helical spring (106) is associated with the metal fiber structure radiant burner (100) by being compressed when said radiant burner is in an operating position, thereby making it easier to extract said radiant burner when dismounting it.
  9. A cooking assembly according to any one of claims 1 to 8, characterized by the fact that the cooking plate (1) has projections (2, 3) disposed around the opening (4) associated with the metal fiber structure radiant burner (100) for the purpose of supporting the receptacle to be heated over the top face (101) of said radiant burner.
  10. A cooking assembly according to claim 9, characterized by the fact that the projections (2, 3) are corrugations or ridges that are integral with the cooking plate (1), said cooking plate being preferably made of molded glass or of vitroceramic, or else of a solid material constituted by inorganic substances coated with an organic polymer binder.
  11. A cooking assembly according to any one of claims 1 to 8, characterized by the fact that the top face (101) of the metal fiber structure radiant burner (100) has projections (2′, 3′; 2˝, 3˝) for supporting the receptacle to be heated over said top face.
  12. A cooking assembly according to claim 11, characterized by the fact that the projections (2′, 3′) are ridges, ribs, or the like.
  13. A cooking assembly according to claim 11, characterized by the fact that the projections (2˝, 3˝) are rounded studs.
  14. A cooking assembly according to claim 13, characterized by the fact that the rounded studs (2˝, 3˝) are integral with the metal fiber structure radiant burner (100) or with the support (160) for said radiant burner.
  15. A cooking assembly according to claim 13, characterized by the fact that the rounded studs (2˝, 3˝) are added on and are removable.
  16. A cooking assembly according to any one of claims 1 to 15, characterized by the fact that the top face (101) of the metal fiber structure radiant burner (100) is constituted by a single piece such that said face constitutes a single radiant surface (plate 152) which is active over its entire area.
  17. A cooking assembly according to any one of claims 1 to 15, characterized by the fact that the top face (101) of the metal fiber structure radiant burner (100) includes a plurality of disjoint radiant of surfaces (plates 152′) that are flush with the level of the top face (101′) of a common support (160).
  18. A cooking assembly according to claim 17, characterized by the fact that the disjoint of radiant of surfaces (152′) are elongate in shape when seen from above, and are preferably disposed parallel to a common direction (A).
  19. A cooking assembly according to claim 17 or 18, characterized by the fact that the common support (160) closes the opening (4) associated with the radiant burner (100) and covers the edge of said opening, and is connected, preferably by means of a bayonet system, to a stationary housing (150) disposed beneath the cooking plate (1) coaxially with said opening, said stationary housing constituting an air/gas mixture chamber (151) common to all of the disjoint radiant of surfaces (152′).
  20. A cooking assembly according to claim 19, characterized by the fact that the common support (160) is a metal block, which is preferably externally protected by means of a coating.
  21. A cooking assembly according to any one of claims 1 to 20, characterized by the fact that each metal fiber structure radiant burner (100) is fed with air by means of an associated fan (303), said air drawing in the gas required for making up the mixture by means of a venturi (302), the gas being injected through the throat of the venturi.
EP91917545A 1990-10-01 1991-09-26 Cooking assembly for cooker or cooking table having at least one gas burner Expired - Lifetime EP0504355B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9012060A FR2667384A1 (en) 1990-10-01 1990-10-01 COOKING ASSEMBLY FOR COOKING.
FR9012060 1990-10-01
PCT/FR1991/000752 WO1992006334A1 (en) 1990-10-01 1991-09-26 Cooking assembly for cooker or cooking table having at least one gas burner

Publications (2)

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

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Family Applications (2)

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EP91917312A Expired - Lifetime EP0503038B1 (en) 1990-10-01 1991-09-26 Cooking assembly for stove or cooking table having at least one integrated heat generator
EP91917545A Expired - Lifetime EP0504355B1 (en) 1990-10-01 1991-09-26 Cooking assembly for cooker or cooking table having at least one gas burner

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP91917312A Expired - Lifetime EP0503038B1 (en) 1990-10-01 1991-09-26 Cooking assembly for stove or cooking table having at least one integrated heat generator

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Country Link
US (2) US5313049A (en)
EP (2) EP0503038B1 (en)
JP (2) JPH05503766A (en)
AT (1) ATE115268T1 (en)
AU (2) AU8658991A (en)
DE (2) DE69101054D1 (en)
ES (2) ES2066478T3 (en)
FR (1) FR2667384A1 (en)
WO (2) WO1992006334A1 (en)

Cited By (1)

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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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DE59400190D1 (en) * 1994-05-24 1996-05-15 Kolja Kuse Countertop hob
FR2735562B1 (en) * 1995-06-19 1997-08-14 Eurokera VITROCERAMIC GAS COOKING PLATE AND MANUFACTURING METHOD
AU1030897A (en) * 1995-12-04 1997-06-27 Aktiebolaget Electrolux A resistive heating element for a cooker
DE29721603U1 (en) * 1997-07-01 1998-01-29 FCT Systeme der Strukturkeramik GmbH, 96528 Rauenstein Cooktop
IL138237A (en) 2000-09-04 2008-12-29 Stryker Gi Ltd Double sleeve endoscope
US6807962B2 (en) * 2002-01-28 2004-10-26 Schott Glas Kitchen gas cooking stove with a glass-ceramic, glass, or ceramic top, a gas cooktop with a glass-ceramic, glass, or ceramic top, and a glass-ceramic, glass, or ceramic top of a cooking stove or cooktop with a venting structure thereon
US7011300B2 (en) * 2003-10-02 2006-03-14 National Environmental Products, Ltd. Steam humidifier and method
US7766005B2 (en) * 2006-01-20 2010-08-03 Lg Electronics Inc. Gas radiation burner and controlling method thereof
DE102007043259A1 (en) * 2007-09-11 2009-03-12 BSH Bosch und Siemens Hausgeräte GmbH Gas hob
DE102008059789A1 (en) * 2008-12-01 2010-06-02 Wamsler Haus- und Küchentechnik GmbH Hob for placing over a heat generator
NL2003212C2 (en) * 2009-07-16 2011-01-18 Rvs Werken B V BURNER MODULE FOR A COOKER, A COOKER AND A METHOD FOR MANUFACTURING IT.
JP5770554B2 (en) * 2011-07-26 2015-08-26 大阪瓦斯株式会社 Gas stove
JP5770555B2 (en) * 2011-07-26 2015-08-26 大阪瓦斯株式会社 Stove

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

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