| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas fan-heater in which flame stability of a lean premixed combustion burner is improved to obtain a high turn-down ratio, and a combustion chamber is miniaturized. SOLUTION: The gas fan-heater 1 has a casing 2, a warm-air outlet 4a is made in a front plate 4, inlets 5a, 5b for dilution air are opened in a rear plate 5, and a convection fan 9 and a combustion chamber 10 are provided in the casing 2. The chamber 10 has a fireproof wall 11, in which dilution air inlet 11a, 11b and a combustion gas outlet 11c are provided. The combustion chamber 10 is provided with a gas burner 12, which has a combustion part 13 and an integrally formed mixer 14. A flame-stabilizing wall 17 is fixed in the opening of the casing of the combustion part 13. Heat-resistant metal fiber is employed in the combustion face. An air path P1 is formed in the upper part of the chamber 10. |
