Gas burner

F - Mech Eng,Light,Heat,Weapons – 23 – D

Patent

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Details

F23D 14/10 (2006.01) F23D 14/46 (2006.01) F23D 14/70 (2006.01) F23D 14/84 (2006.01) F24C 3/00 (2006.01) F24C 15/06 (2006.01)

Patent

CA 2320272

A gas burner that produces a yellow flame for use in a fireplace assembly, including front and rear non-combustible logs and a cross-over log supported atop the front and rear logs. The burner includes an elongate, generally tubular sheet metal body having an inlet end, a closed distal end and a tubular segment extending between the ends. The inlet end is formed to define a gas orifice holder which is adapted to mount a gas orifice element and to define at least one primary air opening arranged to admit combustion air into the tubular burner segment. A bluff body is located downstream from the gas orifice element and is positioned such that gas emitted by the orifice impinges on the bluff body. Rows of slot-like flame ports are defined in the tubular segment and are arranged to create a desired predetermined flame pattern and include tabs which determine the effective size of the ports. In regions of the burner located below the crossover log, flame ports are eliminated and/or formed of reduced size, thus providing a flame of lower height and/or less intensity, thus substantially eliminating sooting. In alternate embodiments, the bluff body is formed by a pair of confronting depressions that define a pair of venturi channels which define the mixing chamber. In another embodiment, the confronting depressions are spaced apart and mount a cylindrical bluff element therebetween. The use of venturi channels eliminates or substantially reduces the incidence of light back.

L'invention concerne un brûleur à gaz (10) produisant une flamme jaune, destiné à être utilisé dans un ensemble foyer. Ce brûleur à gaz comporte des bûches (16, 18) avant et arrière non combustibles, et au moins une bûche (20) transversale ou traversante soutenue par les bûches avant et arrière. Ce brûleur comporte un corps (10a) en tôle allongé, généralement tubulaire, comprenant une extrémité d'entrée, une extrémité distale fermée (22) et un segment tubulaire s'étendant entre ces extrémités. L'extrémité d'entrée est formée de façon à définir un support (40) d'orifice à gaz conçu pour le montage d'un élément d'orifice à gaz. L'extrémité d'entrée est également formée de manière à définir au moins une ouverture d'air primaire conçue pour laisser entrer de l'air de combustion dans le segment tubulaire du brûleur. Un corps non profilé (50), se trouvant en aval de l'élément (32) d'orifice à gaz, est placé de manière que le gaz émis par l'orifice se heurte au corps non profilé (50). Des rangées d'orifices (32) à flammes sont définies dans le segment tubulaire et disposées de manière à créer une forme de flamme prédéterminée voulue. Les orifices (32) à flammes, dont la construction est de type fente, comportent des pattes (80a) qui déterminent la taille réelle des orifices.

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