| 摘要 |
PROBLEM TO BE SOLVED: To provide a burner apparatus excellent in flame insulation capability and performing stable combustion even when the amount of injection of fuel gas is reduced. SOLUTION: There are provided first nozzle means 10 for specifying a first flow passage 45, second nozzle means 12 for specifying a second flow passage 47, an injection nozzle body 20 having an injection hole 48 for injecting fuel gas, and an air flow passage 8 for supplying air to the first and second flow passages 45, 47. When the amount of supply of fuel gas is little, an injection speed thereof is reduced, and the fuel gas flows into the first flow passage 5 by receiving action of the air stream flowing through the first flow passage 45, while, when the amount of supply of the fuel gas is much, an injection speed thereof is increased, whereby the fuel gas surmounts the air stream flowing through the first flow passage 45 and flows through the second flow passage 47.
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