| 摘要 |
PROBLEM TO BE SOLVED: To promote the mixing of a fuel gas and primary air even if a length of a mixing pipe part 65 is shortened, in a flat burner having an oblong flame port part at its upper end which comprises the mixing pipe part 65 having a flow-in port 65a and a throat part 65b adjoining the rear of the flow-in port, and a distribution chamber part 66 which introduces, from the mixing pipe part to the flame port part, a fuel mixture mixed with the fuel gas injected from a gas nozzle 71 which faces the flow-in port and the primary air which flows in from the flow-in port.SOLUTION: The throat part 65b is formed so that a sectional center O2 of the throat part is in a position which is offset in one direction out of up and down directions with respect to a sectional center O1 of the flow-in port 65a. The gas nozzle 71 is arranged so that a hole axis of a nozzle hole 71a of the gas nozzle passes a position in the vertical direction which is displaced to the sectional center O1 of the flow-in port 65a from the sectional center O2 of the throat part 65b. |
