| 摘要 |
PURPOSE:To prevent generation of superheat on a fuel gas dispersion pipe, by providing the fuel gas dispersion pipe in a state bringing the pipe into contact with a burner body case constituting a combustion air supply path. CONSTITUTION:A burner body case 5 is constituted by making press processing of a metal plate so that a plurality of rows of straight-pipelike combustion air supply paths 3 and a plurality of rows of cooling air spouting grooves 4 whose cross sections make almost a triangle or a trapezoid are formed on the upper part of a bottom air chamber 1 making a lengthy square shape (rectangular parallellepiped) with a partition wall 2 between the supply path 3... and the spouting groove 4.... Then straight-pipelike and a tip-blockaded fuel gas dispersion pipes 6... are arranged respectively in hollow part between combustion air supply paths 3, 3 of the combustion air supply paths 3... adjoining with each other in a state that almost a lower half circumference of the dispersion pipe is brought into contact with a burner body case 5.
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