| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of causing a misfire in a weak fire state, when a grease agent blocks up the smallest gas passage port 61a, though the grease agent also serving for a seal and lubrication is applied between an opening-closing valve 5 and a close contact surface 62, in a heating power controlling device for making gas flow only to the gas passage port coincident with a valve opening part 51, by bringing an opening-closing plate 5 into close contact with the close contact surface 62 being an under surface of a gas passage plate 6 for opening a plurality of gas passage ports 61a and 61b. SOLUTION: A clearance space 63 is formed by retreating the periphery of the gas passage port 61a by one stage from a close contact surface 61. The grease agent gathers in the clearance space 63, and does not enter the gas passage port 61a. The grease agent is further hardly clogged since gas is always made to flow to the gas passage port 61a by passing through a cutout 46. COPYRIGHT: (C)2006,JPO&NCIPI
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