| 摘要 |
PROBLEM TO BE SOLVED: To improve combustion property in extinguishment, and prevent odor of non-combusted mixed gas from occurring. SOLUTION: There are provided a thin combustion section 20 composed of a thin inlet section 21 for sucking a fuel and air, a thin mixing chamber 22, and a thin flame hole 23, a thick combustion section 24 constructed with a thick inlet section 25 for sucking a fuel, a thick mixing chamber 26, and a thick flame hole 27, and a communication hole 29 communicating the thin mixing chamber 22 and the thick mixing chamber 26. Hereby, a fuel flowing into and being accumulated in the thick inlet section 25 has a slow flow speed, so that a thick flame is kept longer than a thin flame. Therefore, since the thick flame keeps the thin flame up to the last, the thin flame is prevented from being blown out, and hence odor is prevented from happening owing to non-combusted diluted premixed gas.
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