Combustion – Flame holder having protective flame enclosing or flame... – Including means feeding air axially spaced points of the flame
Patent
1984-06-20
1986-09-09
Focarino, Margaret A.
Combustion
Flame holder having protective flame enclosing or flame...
Including means feeding air axially spaced points of the flame
431352, F23D 1500
Patent
active
046106260
ABSTRACT:
A high load gas combustion apparatus for use mainly in domestic combustors which require a low noise level and compactness. Some of the air for burning supplied from a fan is suctioned to fuel gas jetted through a nozzle to produce a mixture in a mixing tube section, which is then introduced to a mixture chamber defined by a burner body having a uniform shape in the lengthwise direction. The mixture flows into a downstream combustion chamber at a relatively low speed through a flame port section which is incorporated in the burner body on the downstream side of the mixture chamber, and which comprises a number of flame ports having a large opening ratio. The majority of air is supplied to air chambers on both sides of the mixture chamber partitioned by the burner body therefrom. The air chambers and the combustion chamber are partitioned by an air jet plate which includes a number of air ports arranged in wave-like form in the oblique portion thereof and a number of flame retention air ports arranged in the lengthwise direction of the flame port section. Some of the air supplied to the air chambers is supplied under reduced pressure to a flame retention chamber, which is constituted by a recess formed in a part of the burner body on either side of the flame port section, through small gaps formed between the air jet plates and the side wall of the recess, and then flows into the combustion chamber at a lower speed from both sides of the flame port section through the flame retention air ports, thus ensuring flame retention. The majority of the air supplied to the air chambers flows into the combustion chamber through the air ports so as to cross the direction of flow of the mixture for producing a steady flame along the air ports arranged in zigzag form, thus greatly enlarging the combustion reaction area.
REFERENCES:
patent: 3494711 (1970-02-01), Spielman
patent: 3592578 (1971-07-01), Weatherston
patent: 4311451 (1982-01-01), Matumoto et al.
Fujishita Kazuo
Furumai Koro
Indou Masahiro
Kikutani Fumitaka
Focarino Margaret A.
Kamen Noah
Matsushita Electric - Industrial Co., Ltd.
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