EP0848796A1 - "living flame"-type gas burner - Google Patents

"living flame"-type gas burner

Info

Publication number
EP0848796A1
EP0848796A1 EP96929142A EP96929142A EP0848796A1 EP 0848796 A1 EP0848796 A1 EP 0848796A1 EP 96929142 A EP96929142 A EP 96929142A EP 96929142 A EP96929142 A EP 96929142A EP 0848796 A1 EP0848796 A1 EP 0848796A1
Authority
EP
European Patent Office
Prior art keywords
aforementioned
fuel
flat sheet
burner
holes
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.)
Granted
Application number
EP96929142A
Other languages
German (de)
French (fr)
Other versions
EP0848796B1 (en
Inventor
Claude Berlaimont
Raymond Champion
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fonderies Du Lion SA
Thermic Investments
Original Assignee
Fonderies Du Lion SA
Thermic Investments
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fonderies Du Lion SA, Thermic Investments filed Critical Fonderies Du Lion SA
Publication of EP0848796A1 publication Critical patent/EP0848796A1/en
Application granted granted Critical
Publication of EP0848796B1 publication Critical patent/EP0848796B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/002—Stoves
    • F24C3/006—Stoves simulating flames

Definitions

  • the present invention relates to a gas burner of the so-called "living flame” type, ie. a gas burner whose flames carry to a certain degree of glowing artificial logs or charcoal.
  • the gas burner is essentially constituted by a combustion chamber in which the fuel (gas) / oxidizer (primary air) mixture circulates, having at its upper part a flat sheet metal intended to receive a artificial fuel, said sheet having holes for the passage of said fuel / oxidizer mixture arranged at the limit of the aforementioned flat sheet, near the zone in which the secondary air circulates.
  • the aforementioned holes are located in a marginal zone along the outer perimeter of the aforementioned flat sheet.
  • the aforementioned holes are located at the limit on the one hand of the outer perimeter of the aforementioned sheet and on the other hand of the inner perimeter of the aforementioned orifice.
  • the aforementioned holes have a diameter such that, taking into account the pressure prevailing in the aforementioned chamber, the richness in primary air of the fuel / oxidizer mixture, the flashback phenomenon is rendered impossible.
  • Figures 1 and 2 are plan views of the burner according to the invention, in a first embodiment.
  • Figure 3 is a perspective view, in a schematic embodiment, showing the path that the fuel / oxidizer mixture can follow in the burner chamber.
  • Figure 4 shows, on a larger scale and in a cross section conducted in a vertical plane, the manner in which the flames of the burner are curved under the effect of secondary air currents.
  • FIGS 4 and 5 schematically illustrate the flame curving process towards the artificial fuel.
  • the objective being to deflect the flames of these burners by making use of an ascending secondary air current, this is achieved in living flame burners which essentially consist of a chamber 1 (fig. 3) in which the fuel (gas) / oxidant (primary air) mixture circulates, and a flat upper plate 2 (fig. 1 and 2) drilled with holes 3 - 3 '(fig. 1 and 2) allowing the supply of the flame.
  • the flame must be deflected in the direction of logs or blocks of artificial fuel to carry at least locally incandescent artificial fuel placed on the flat sheet or in its vicinity (fig. 4 and 5). In the spirit of the invention, this can be obtained by making the holes 3 (fig. 1 and 2) at the very limit of the flat sheet 2 (fig.
  • the burner is represented by the general reference 4, the artificial fuel by the reference 5 and a flame bundle by the reference 6.
  • the updraft of secondary air is represented in this same figure by two arrows.
  • the same phenomenon is observed when the burner is of the type represented in FIGS. 1 and 2.
  • the burner according to FIG. 2 has a topological surface of a type greater than one.
  • the flat sheet 2 of the burner according to these two figures has two orifices 7 which results in a significant elongation of the perimeter corresponding to the area in which the holes 3 - 3 'are formed (fig. 2).
  • the total perimeter consists of the convex perimeter arising from the geometric shape of the flat sheet 1 (fig. 1 and 2) plus the concave perimeter of one or more orifices 7 (fig. 2).
  • FIG. 5 where the burner is represented by the reference 4 and the fuel by the reference 5.
  • the zone A shows how the secondary air curves the flame towards the horizontal .
  • This zone A is followed by a zone B where gravity straightens the flame and causes localized instability and an aspect of chaos determining the spatial distribution of the flame if it is long enough to escape freely over the fuel. Consequently, the transition from the laminar flow zone to the transient pseudoturbulence takes place with a lower gas flow rate than in an axial diffusion flame or with a symmetry with respect to a vertical plane.
  • the design of the burner according to the invention allows a very flexible distribution of the flames which gives complete freedom to choose the necessarily clear passage of the flames in the fireplace decoration according to the desired aesthetics.
  • any interior point i.e. any point inside chamber 1 (fig. 3) can be reached by two different paths.
  • this point represented by the letter P can, from the venturi 8 through which the fuel (gas) / oxidizer (primary air) mixture is reached, be reached by one of the three paths designated by one of the references 9, 10 or 11.
  • the dynamic pressure of the mixture inside the burner is very easily homogenized at all flow rates, i.e. at all power regimes since the mixture is never blocked or trapped in one or the other "dead end" where the kinetic energy could be transformed into high static pressure.
  • the heterogeneity of the pressure of the mixture inside the burner would indeed create a heterogeneity of the speeds of ejection of this mixture in the direction of the flames, which would cause delamination in an excess air situation (blue flame) and a sooty stretch in a situation without excess air (yellow flame).
  • the burner shown in Figures 1 and 2 has a hexagonal periphery.
  • This periphery could have 3, 4, 5, 7, 8 sides or, generally, n sides, or have a circular or oval outline.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)

Abstract

The invention concerns a 'living flame'-type gas burner, i.e. a gas burner of which the flames bring artificial coal or logs to a given degree of incandescence. The gas burner is characterized in that it comprises a combustion chamber in which the mixture of fuel (gas) - oxidizing agent (primary air) circulates. At the top, the combustion chamber comprises a flat metal sheet (2) for receiving an artificial fuel, said metal sheet having holes (3) through which the fuel-oxidizing agent mixture passes. The holes (3) are disposed at the edge of the flat metal plate (2) in the vicinity of the area in which the secondary air circulates.

Description

"Brûleur à gaz du type dit "à flammes vivantes" "Gas burner of the so-called" living flame "type
La présente invention se rapporte à un brûleur à gaz du type dit "à flammes vivantes", c.à.d. un brûleur à gaz dont les flammes portent à un certain degré d'incandescence des bûches ou du charbon artificiels.The present invention relates to a gas burner of the so-called "living flame" type, ie. a gas burner whose flames carry to a certain degree of glowing artificial logs or charcoal.
Ces combustibles artificiels sont léchés de manière plus au moins heureuse par les flammes. Pour parvenir à l'effet esthétique désiré, une surface aussi grande que possible du combustible artificiel doit être portée à incandescence.These artificial fuels are licked more or less happily by the flames. To achieve the desired aesthetic effect, as large an area as possible of the artificial fuel should be heated to incandescent.
Ce résultat n'est pas atteint si la conception du brûleur n'est pas étudiée en vue de diriger les flammes dans une direction telle que le combustible artificiel puisse être porté à un degré d'incandescence élevé.This result is not achieved if the design of the burner is not studied with a view to directing the flames in a direction such that the artificial fuel can be brought to a high degree of incandescence.
Pour réaliser cet objectif conformément à l'invention, le brûleur à gaz est essentiellement constitué par une chambre de combustion dans laquelle circule le mélange carburant (gaz) / comburant (air primaire) , présentant à sa partie supérieure une tôle plate destinée à recevoir un combustible artificiel, ladite tôle présentant des trous pour le passage dudit mélange carburant/comburant disposés à la limite de la tôle plate précitée, à proximité de la zone dans laquelle circule l'air secondaire.To achieve this objective in accordance with the invention, the gas burner is essentially constituted by a combustion chamber in which the fuel (gas) / oxidizer (primary air) mixture circulates, having at its upper part a flat sheet metal intended to receive a artificial fuel, said sheet having holes for the passage of said fuel / oxidizer mixture arranged at the limit of the aforementioned flat sheet, near the zone in which the secondary air circulates.
Dans une forme de réalisation particulière, lorsque la tôle précitée est de forme rectangulaire, les trous précités se situent dans une zone marginale le long du périmètre extérieur de la tôle plate précitée.In a particular embodiment, when the aforementioned sheet is of rectangular shape, the aforementioned holes are located in a marginal zone along the outer perimeter of the aforementioned flat sheet.
Dans une forme particulièrement avantageuse, lorsque la tôle précitée présente au moins un orifice, les trous précités se situent à la limite d'une part du périmètre extérieur de la tôle précitée et d'autre part du périmètre intérieur de l'orifice précité.In a particularly advantageous form, when the aforementioned sheet has at least one orifice, the aforementioned holes are located at the limit on the one hand of the outer perimeter of the aforementioned sheet and on the other hand of the inner perimeter of the aforementioned orifice.
Toujours dans l'esprit de l'invention, les trous précités ont un diamètre tel que, compte tenu de la pression régnant dans la chambre précitée, de la richesse en air primaire du mélange carburant/comburant, le phénomène de retour de flamme soit rendu impossible. D'autres détails et avantages de l'invention ressortiront de la description qui sera donnée ci-après d'un brûleur à gaz à surface plate dit à flammes vivantes, selon l'invention. Cette description n'est donnée qu'à titre d'exemple et ne limite pas l'invention. Les notations de référence se rapportent aux figures ci-jointes.Still in the spirit of the invention, the aforementioned holes have a diameter such that, taking into account the pressure prevailing in the aforementioned chamber, the richness in primary air of the fuel / oxidizer mixture, the flashback phenomenon is rendered impossible. Other details and advantages of the invention will emerge from the description which will be given below of a gas burner with a flat surface known as a living flame, according to the invention. This description is given by way of example only and does not limit the invention. The reference notations refer to the attached figures.
Les figures 1 et 2 sont des vues en plan du brûleur selon l'invention, dans une première forme d'exécution. La figure 3 est une vue en perspective, dans une exécution schématique, montrant le trajet que le mélange carburant/comburant peut suivre dans la chambre du brûleur.Figures 1 and 2 are plan views of the burner according to the invention, in a first embodiment. Figure 3 is a perspective view, in a schematic embodiment, showing the path that the fuel / oxidizer mixture can follow in the burner chamber.
La figure 4 montre, à une plus grande échelle et selon une coupe transversale menée dans un plan vertical, la manière dont les flammes du brûleur sont incurvées sous l'effet de courants d'air secondaires.Figure 4 shows, on a larger scale and in a cross section conducted in a vertical plane, the manner in which the flames of the burner are curved under the effect of secondary air currents.
Les figures 4 et 5 illustrent schématiquement le processus d'incurvation des flammes en direction du combustible artificiel.Figures 4 and 5 schematically illustrate the flame curving process towards the artificial fuel.
Les brûleurs à gaz représentés par ces figures sont de conception identique mais de forme différente si l'on se réfère, d'une part, aux figures 1 et 2 et, d'autre part, aux figures 3, 4 et 5.The gas burners represented by these figures are of identical design but of different shape if one refers, on the one hand, to Figures 1 and 2 and, on the other hand, to Figures 3, 4 and 5.
En effet, l'objectif étant de dévier les flammes de ces brûleurs en faisant usage d'un courant d'air secondaire ascendant, ceci est atteint dans les brûleurs à flammes vivantes qui sont essentiellement constitués d'une chambre 1 (fig. 3) dans laquelle circule le mélange carburant (gaz) /comburant (air primaire), et d'une tôle supérieure plate 2 (fig. 1 et 2) percés de trous 3 - 3' (fig. 1 et 2) permettant l'alimentation de la flamme. La déviation de la flamme doit se faire en direction de bûches ou de blocs de combustible artificiel pour porter au moins localement à incandescence le combustible artificiel disposé sur la tôle plate ou dans son voisinage (fig. 4 et 5) . Dans l'esprit de l'invention, ceci peut être obtenu en ménageant les trous 3 (fig. 1 et 2) à la limite même de la tôle plate 2 (fig. 1 et 2) quelle qu'en soit la forme et cela dans la zone dans laquelle circule l'air secondaire. L'air secondaire circule en effet de bas en haut le long des parois verticales de la chambre 1 (fig. 3) et du brûleur représenté aux fig. 4 et 5. Ce courant ascendant d'air secondaire provoque un infléchissement des flammes en direction du combustible artificiel reposant sur la tôle plate 2 (fig. 1 et 2) du brûleur.In fact, the objective being to deflect the flames of these burners by making use of an ascending secondary air current, this is achieved in living flame burners which essentially consist of a chamber 1 (fig. 3) in which the fuel (gas) / oxidant (primary air) mixture circulates, and a flat upper plate 2 (fig. 1 and 2) drilled with holes 3 - 3 '(fig. 1 and 2) allowing the supply of the flame. The flame must be deflected in the direction of logs or blocks of artificial fuel to carry at least locally incandescent artificial fuel placed on the flat sheet or in its vicinity (fig. 4 and 5). In the spirit of the invention, this can be obtained by making the holes 3 (fig. 1 and 2) at the very limit of the flat sheet 2 (fig. 1 and 2) whatever its shape and that in the area in which the secondary air circulates. Secondary air in fact flows from bottom to top along the vertical walls of chamber 1 (fig. 3) and of the burner shown in figs. 4 and 5. This ascending flow of secondary air causes the flames to deflect in the direction of the artificial fuel resting on the flat sheet 2 (fig. 1 and 2) of the burner.
Cet infléchissement est dû à la dilatation des gaz ionisés soumis à la "combustion secondaire" en présence de l'air secondaire. Du côté opposé de la flamme, à savoir du côté du combustible artificiel solide, le manque d'air secondaire donne l'impression que ce combustible artificiel solide évapore par distillation interne un mélange gazeux combustible, alors qu'il s'agit en fait des produits d'une combustion primaire non achevée en C02 et H20. On dispose le combustible artificiel solide de telle manière qu'à tous les régimes du fonctionnement, la partie jaune de la flamme - où les produits transitoires de la réaction chimique extrêmement complexe forment des agrégats floconneux de carbone (suie) - n'entre pas en contact avec une zone froide du combustible artificiel située entre les zones portées à incandescence. On évite ainsi le dépôt des suies qui sont brûlées à un plus haut niveau dans le développement de la flamme. On développe par ce stratagème une combustion hygiénique avec une imitation quasi parfaite de la combustion ordinaire d'un combustible solide.This deflection is due to the expansion of the ionized gases subjected to "secondary combustion" in the presence of secondary air. On the opposite side of the flame, i.e. on the side of solid artificial fuel, the lack of secondary air gives the impression that this solid artificial fuel evaporates by internal distillation a combustible gaseous mixture, whereas it is in fact the products of a primary combustion not completed in C0 2 and H 2 0. The solid artificial fuel is available in such a way that at all operating modes, the yellow part of the flame - where the transient products of the extremely complex chemical reaction form fluffy aggregates of carbon (soot) - does not come into contact with a cold zone of the fuel artificial located between the incandescent zones. This avoids the deposition of soot which is burned at a higher level in the development of the flame. This stratagem develops hygienic combustion with an almost perfect imitation of the ordinary combustion of a solid fuel.
Aux figures 4 et 5, le brûleur est représenté par la référence générale 4, le combustible artificiel par la référence 5 et un faisceau de flammes par la référence 6. Le courant ascendant d'air secondaire est représenté dans cette même figure par deux flèches.In FIGS. 4 and 5, the burner is represented by the general reference 4, the artificial fuel by the reference 5 and a flame bundle by the reference 6. The updraft of secondary air is represented in this same figure by two arrows.
Le même phénomène s'observe lorsque le brûleur est du type représenté aux figures 1 et 2. Le brûleur selon la figure 2 est à surface topologique de genre supérieur à l'unité. La tôle plate 2 du brûleur selon ces deux figures présente deux orifices 7 ce qui entraîne un allongement important du périmètre correspondant à la zone dans laquelle sont ménagés les trous 3 - 3' (fig. 2).The same phenomenon is observed when the burner is of the type represented in FIGS. 1 and 2. The burner according to FIG. 2 has a topological surface of a type greater than one. The flat sheet 2 of the burner according to these two figures has two orifices 7 which results in a significant elongation of the perimeter corresponding to the area in which the holes 3 - 3 'are formed (fig. 2).
Le périmètre total est constitué du périmètre convexe découlant de la forme géométrique de la tôle plate 1 (fig. 1 et 2) plus le périmètre concave d'un ou plusieurs orifices 7 (fig. 2) . On obtient de la sorte une grande puissance dans un brûleur plat de surface relativement réduite. En raison de la grande concentration de flammes sur la surface de la tôle plate 1 (fig. 1 et 2) du brûleur une disposition mieux appropriée (plus esthétique) du combustible artificiel est possible.The total perimeter consists of the convex perimeter arising from the geometric shape of the flat sheet 1 (fig. 1 and 2) plus the concave perimeter of one or more orifices 7 (fig. 2). We get produces great power in a flat burner with a relatively small surface. Due to the high concentration of flames on the surface of the flat sheet 1 (fig. 1 and 2) of the burner, a more suitable (more aesthetic) arrangement of the artificial fuel is possible.
Le phénomène recherché de l'incurvation des flammes en direction du combustible artificiel s'observera dans les zones délimitant le périmètre extérieur de la tôle plate ainsi que dans les zones délimitant le périmètre intérieur des orifices 7 (fig. 2).The desired phenomenon of the bending of the flames towards the artificial fuel will be observed in the zones delimiting the external perimeter of the flat sheet metal as well as in the zones delimiting the internal perimeter of the orifices 7 (fig. 2).
Le phénomène de l'incurvation est encore explicité par la figure 5, où le brûleur est représenté par la référence 4 et le combustible par la référence 5. Dans cette figure la zone A montre comment l'air secondaire courbe la flamme vers l'horizontale. Cette zone A est suivie d'une zone B où la gravité redresse la flamme et entraîne une instabilité localisée et un aspect de chaos déterminant la répartition spatiale de la flamme si elle est assez longue pour s'échapper librement au-dessus du combustible. Dès lors, le passage de la zone d'écoulement laminaire à la pseudoturbulence transitoire se fait avec un débit de gaz moins fort que dans uns flamme de diffusion axiale ou à symétrie par rapport à un plan vertical.The phenomenon of the bending is further explained by FIG. 5, where the burner is represented by the reference 4 and the fuel by the reference 5. In this figure the zone A shows how the secondary air curves the flame towards the horizontal . This zone A is followed by a zone B where gravity straightens the flame and causes localized instability and an aspect of chaos determining the spatial distribution of the flame if it is long enough to escape freely over the fuel. Consequently, the transition from the laminar flow zone to the transient pseudoturbulence takes place with a lower gas flow rate than in an axial diffusion flame or with a symmetry with respect to a vertical plane.
La conception du brûleur selon l'invention permet une répartition très souple des flammes ce qui donne toute liberté de choisir le passage nécessairement dégagé des flammes dans le décor de foyer en fonction de l'esthétique recherchée.The design of the burner according to the invention allows a very flexible distribution of the flames which gives complete freedom to choose the necessarily clear passage of the flames in the fireplace decoration according to the desired aesthetics.
Dans un brûleur du type représenté aux figures 2 et 3, tout point intérieur, c.à.d. tout point à l'intérieur de la chambre 1 (fig. 3) peut être atteint par deux chemins différents. A la figure 3, ce point représenté par la lettre P peut, à partir du venturi 8 par lequel pénètre le mélange carburant (gaz) /comburant (air primaire) être atteint par l'un des trois chemins désignés par l'une des références 9, 10 ou 11.In a burner of the type shown in Figures 2 and 3, any interior point, i.e. any point inside chamber 1 (fig. 3) can be reached by two different paths. In FIG. 3, this point represented by the letter P can, from the venturi 8 through which the fuel (gas) / oxidizer (primary air) mixture is reached, be reached by one of the three paths designated by one of the references 9, 10 or 11.
Dès lors, la pression dynamique du mélange à l'intérieur du brûleur s'homogénéise très facilement à tous les débits, c.à.d. à tous les régimes de puissance puisque le mélange ne se trouve jamais bloqué ou coincé dans l'un ou l'autre "cul de sac" là où l'énergie cinétique pourrait se transformer en pression statique élevée.Therefore, the dynamic pressure of the mixture inside the burner is very easily homogenized at all flow rates, i.e. at all power regimes since the mixture is never blocked or trapped in one or the other "dead end" where the kinetic energy could be transformed into high static pressure.
L'hétérogénéité de la pression du mélange à l'intérieur du brûleur créerait en effet une hétérogénéité des vitesses d'éjection de ce mélange en direction des flammes, ce qui provoquerait le décollement en situation d'excès d'air (flamme bleue) et un étirement fuligineux en situation sans excès d'air (flamme jaune) .The heterogeneity of the pressure of the mixture inside the burner would indeed create a heterogeneity of the speeds of ejection of this mixture in the direction of the flames, which would cause delamination in an excess air situation (blue flame) and a sooty stretch in a situation without excess air (yellow flame).
Le brûleur représenté aux figures 1 et 2 présente un pourtour hexagonal. Ce pourtour pourrait présenter 3, 4, 5, 7, 8 côtés ou, d'une manière générale, n côtés, ou présenter un contour circulaire ou ovale.The burner shown in Figures 1 and 2 has a hexagonal periphery. This periphery could have 3, 4, 5, 7, 8 sides or, generally, n sides, or have a circular or oval outline.
L'invention n'est pas limitée à la forme d'exécution décrite ci-dessus et bien des modifications pourraient y être apportées pour autant qu'elles tombent dans le cadre des revendications annexées. The invention is not limited to the embodiment described above and many modifications could be made to it, provided that they fall within the scope of the appended claims.

Claims

REVENDICATIONS
1. Brûleur à gaz du type dit "à flammes vivantes", c.à.d. un brûleur à gaz dont les flammes portent à un certain degré d'incandescence des bûches ou du charbon artificiels, caractérisé en ce qu'il est constitué par une chambre de combustion dans laquelle circule le mélange carburant (gaz) / comburant (air primaire) , présentant à sa partie supérieure une tôle plate (2) destinée à recevoir un combustible artificiel, ladite tôle présentant des trous (3) pour le passage dudit mélange carburant/comburant disposés à la limite de la tôle plate précitée (2) , à proximité de la zone dans laquelle circule l'air secondaire.1. Gas burner of the so-called "living flame" type, ie a gas burner whose flames carry to a certain degree of glowing artificial logs or charcoal, characterized in that it is constituted by a combustion chamber in which the fuel (gas) / oxidizer (primary air) mixture circulates , having at its upper part a flat sheet (2) intended to receive an artificial fuel, said sheet having holes (3) for the passage of said fuel / oxidizer mixture disposed at the limit of the aforementioned flat sheet (2), the area in which the secondary air circulates.
2. Brûleur selon la revendication précédente, caractérisé en ce que, lorsque la tôle plate précitée (2) est de forme rectangulaire, les trous précités (3) se situent dans une zone marginale située le long du périmètre extérieur de la tôle plate précitée. 2. Burner according to the preceding claim, characterized in that, when the aforementioned flat sheet (2) is rectangular, the aforementioned holes (3) are located in a marginal zone located along the outer perimeter of the aforementioned flat sheet.
3. Brûleur selon la revendication 1, caractérisé en ce que, lorsque la tôle plate précitée (2) présente au moins un orifice (7) , les trous précités (3) se situent à la limite d'une part du périmètre extérieur de la tôle précitée et d'autre part du périmètre intérieur de l'orifice précité.3. Burner according to claim 1, characterized in that, when the aforementioned flat sheet (2) has at least one orifice (7), the aforementioned holes (3) are located at the limit of a part of the outer perimeter of the aforementioned sheet and on the other hand of the interior perimeter of the aforementioned orifice.
4. Brûleur selon la revendication 3, caractérisé en ce que plus d'un orifice (7) est prévu dans la tôle plate précitée (2) .4. Burner according to claim 3, characterized in that more than one orifice (7) is provided in the aforementioned flat sheet (2).
5. Brûleur selon l'une des revendications 2 à 4, caractérisé en ce que la tôle plate précitée (2) a un pourtour polygonal.5. Burner according to one of claims 2 to 4, characterized in that the aforementioned flat sheet (2) has a polygonal periphery.
6. Brûleur selon l'une des revendications 2 à 4, caractérisé en ce que la tôle plate précitée (2) a un pourtour circulaire ou ovale. 6. Burner according to one of claims 2 to 4, characterized in that the aforementioned flat sheet (2) has a circular or oval periphery.
7. Brûleur selon l'une quelconque des revendications 1 - 6, caractérisé en ce que les trous précités (3) ont un diamètre tel que, compte tenu de la pression régnant dans la chambre précitée, de la richesse en air primaire du mélange carburant/comburant, le phénomène du retour de flamme soit rendu impossible. 7. Burner according to any one of Claims 1 - 6, characterized in that the above-mentioned holes (3) have a diameter such that, taking into account the pressure prevailing in the aforementioned chamber, the richness in primary air of the fuel / oxidizer mixture, the phenomenon of flashback be made impossible.
EP96929142A 1995-09-04 1996-09-04 "living flame"-type gas burner Expired - Lifetime EP0848796B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9500732 1995-09-04
BE9500732A BE1009563A6 (en) 1995-09-04 1995-09-04 Gas burner of said type "a flame alive".
PCT/BE1996/000092 WO1997009568A1 (en) 1995-09-04 1996-09-04 'living flame'-type gas burner

Publications (2)

Publication Number Publication Date
EP0848796A1 true EP0848796A1 (en) 1998-06-24
EP0848796B1 EP0848796B1 (en) 1999-11-24

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Application Number Title Priority Date Filing Date
EP96929142A Expired - Lifetime EP0848796B1 (en) 1995-09-04 1996-09-04 "living flame"-type gas burner

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EP (1) EP0848796B1 (en)
JP (1) JPH11514427A (en)
AR (1) AR003505A1 (en)
AT (1) ATE186978T1 (en)
AU (1) AU6866896A (en)
BE (1) BE1009563A6 (en)
CA (1) CA2233886A1 (en)
DE (1) DE69605313T2 (en)
ES (1) ES2141527T3 (en)
IL (1) IL123526A (en)
IS (1) IS4678A (en)
NO (1) NO308679B1 (en)
RU (1) RU2155913C2 (en)
WO (1) WO1997009568A1 (en)
ZA (1) ZA967447B (en)

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Publication number Priority date Publication date Assignee Title
WO2003012341A1 (en) * 2001-08-02 2003-02-13 Thermic Investments S.A. Atmospheric gas burner made of biosoluble and gel-cast ceramic fibers
US7537447B2 (en) 2001-08-02 2009-05-26 Thermic Investments S.A. Atmospheric gas burner made of biosoluble and gel-cast ceramic fibers

Also Published As

Publication number Publication date
BE1009563A6 (en) 1997-05-06
IL123526A0 (en) 1998-10-30
RU2155913C2 (en) 2000-09-10
NO980943L (en) 1998-03-04
JPH11514427A (en) 1999-12-07
AR003505A1 (en) 1998-08-05
AU6866896A (en) 1997-03-27
ATE186978T1 (en) 1999-12-15
DE69605313T2 (en) 2000-07-13
NO980943D0 (en) 1998-03-04
DE69605313D1 (en) 1999-12-30
IL123526A (en) 2000-06-29
EP0848796B1 (en) 1999-11-24
ES2141527T3 (en) 2000-03-16
CA2233886A1 (en) 1997-03-13
NO308679B1 (en) 2000-10-09
ZA967447B (en) 1997-01-03
IS4678A (en) 1998-02-27
WO1997009568A1 (en) 1997-03-13

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