| 摘要 |
PROBLEM TO BE SOLVED: To excellently maintain performance, such as an output and combustion even when a plurality of kinds of fuel gases are used in parallel. SOLUTION: A gas pipe 12 is branched on the side, situated downstream from a gas burner 14, into a main gas pipe 15 connected to a main nozzle 8 and a sub-gas pipe 16 connected to a sub-nozzle 9. A sub-open/close valve 17 to open and close a gas flow passage is situated in the sub-gas pipe 16 and opens and closes the gas flow passage in mechanical interlock with operation of a switching lever 18 situated on the upper surface of an instrument. In case of LPG being fed, LPG is injected through only the main nozzle 8 by closing the sub-open/close valve 17 and in the case that DME is fed, the sub open/close valve 17 is opened and the DME is injected through both the main nozzle 8 and the sub-nozzle 9. |
