| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas burner capable of sensing combustion failure in a combustion part before occurrence while reducing NOx and a burning appliance using the gas burner. SOLUTION: Lean mixed gas wherein an air ratio λ equals to 1.3 is burned to form a flame F1, and all primary mixed gas having a mixing ratio of primary air smaller than that of the mixed gas used for forming the flame F1 is burned to form a flame F2 for sensing separately from the flame F1. By monitoring the flame F2 for sensing by a thermocouple 14, combustion failure is sensed. When oxygen of the primary air to be mixed with fuel gas runs short caused by lack of air due to filter clogging etc., the flame F2 for sensing affected by the lack of oxygen early is separately formed and monitored. Thus, while reduction of NOx is achieved, not only combustion failure due to lack of oxygen but also combustion failure due to lack of air can be securely sensed before occurrence. COPYRIGHT: (C)2011,JPO&INPIT
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