| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustion device capable of preventing unevenness of combustion flame caused by unequal spouting of secondary air. SOLUTION: This combustion device is provided with a secondary air passage formed around a burner head 14 for guiding the secondary air from a secondary air hole, at a secondary air spouting portion 38 for spouting the secondary air to an upper portion of the burner head 14 positioned at an upper portion of a venting hole 10 of a burner mounting base 8 having the venting hole 10 at its center and further having the secondary air hole 12. As a center of the secondary air passage is eccentric in the direction opposite to the secondary air hole 12 with respect to a center of the venting hole 10, a cross-sectional area of the secondary air passage flowing from the secondary air hole toward an opposite side of the secondary air hole 12 is gradually increased. Accordingly, the secondary air smoothly flows from the secondary air hole 12 toward the opposite side of the secondary air hole 12, and uniformly spouts upward from the secondary air spouting portion 38 in a doughnut shape, and the combustion flame can be formed without unevenness. COPYRIGHT: (C)2006,JPO&NCIPI
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