| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable a pilot burner at a single combustion time of a main burner to be prevented from being overheated and burning and at the same time to enable a deterioration of combustibility under duplication combustion of both pilot burner and main burner to be prevented.SOLUTION: This invention relates to a combustion device having a premixing type gas burner comprising one main gas nozzle 3 connected to a main gas line 2 supplying fuel gas G and a plurality of sub-gas nozzles 4. One of the sub-gas nozzles 4 is applied as a nozzle also acting as a pilot burner and at the same time a pilot gas line 5 supplying the fuel gas G is connected to the nozzle also acting as the pilot burner, and each of the main gas line 2 and the pilot gas line 5 connected to the nozzle also acting as the pilot burner is provided with check valves 6, 7.</p> |
