| 摘要 |
PURPOSE:To miniaturize a combustion chamber and a fan, by feeding the secondary combustion air to flames, being formed on burner ports, from both the injection ports of a secondary air chamber and openings provided to the constricted part of a center secondary air passage. CONSTITUTION:The secondary air chambers 4 are symmetrically provided to both upstream sides of a combustion chamber 3, and a mixing chamber 5 is formed, joining these two chambers 4. A plurality of opening 8 are provided, confronted to the inside of a combustion chamber 3. The constricted part 7 of a center secondary air passage 6 is inserted into a burner port 9 and is held by it. The burner port part 9 is formed in slits by juxtaposing a number of thick projected parts 10 which are projected from a part of molded body 1 to the side of a mixing chamber 5. On the other hand, injection ports 11, provided to the molded body 1 in the vicinity of burner port 9 are interconnected to the secondary air chamber 4, the burner port 9, and the combustion chamber 3. Accordingly, the secondary air can be fed into the combustion chamber 3, from both openings 8 and injection ports 11. |
