| 摘要 |
PROBLEM TO BE SOLVED: To realize a burner for a cooking device having a high thermal efficiency and having a wide variable range of a combustion amount. SOLUTION: First flame port grooves 10 are arranged in a radial manner at a lower surface of a flame port block 7 having a shape of a frustum of circular cone. Second flame port grooves 11 are arranged at an upper surface of the block. The flame port grooves 11 are arranged at a location except just above the first flame port grooves 10, thereby igniting a large amount of combustion stably by a thin-type and compact burner and realizing an upward flame to assure a high thermal efficiency.
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