| 摘要 |
PURPOSE:To stabilize the combustion at a main flame hole and suppress the generation of NOx by constituting a main flame hole of a section at which an air-rich mixture gas is blown out and constituting a flame hole for holding flame of a section at which a proper mixture gas is blown out. CONSTITUTION:A gas burner 2 is provided with a main flame hole 11 which discharges a mixture gas of the fuel gas and primary combustion air ratio which is over 1.3 of excess air rate and a flame hole 12 for holding flame which discharges near the main flame hole 11 a mixture gas in the ratio of 0.8-1 of excess air. The mixture gas that is discharged by the flame hole 12 for holding flame has an air mixing amount that is suitable so that the combustion is made for sure and flame is surely formed. On the other hand the mixture gas that is discharged from the main flame hole 11 has a narrow range in which the combustion is good and the flame lifts so that the combustion is unstable and the flame is liable to be blown off. However, flame is formed for sure at the flame hole 12 for holding flame that is adjacent to the main flame 11 and, even if the flame at the main flame hole 11 is blown out, it catches fire again from the flame hole 12 for holding flame. It is, therefore, possible to provide stable combustion and suppress the generation of NOx. |
