| 摘要 |
PURPOSE:To make it possible to excellently observe the combustion state of the gas at a combustion part of the burner from the opening part of the burner from the opening at the inlet side of an air channel, without disturbing the stream of hot air as a state where a reflection mirror and its assembling mechanism do not particularly exist in the air channel. CONSTITUTION:In order to prevent a risk caused by the continuance of the operation of a burner 2 in a state where the quantity of the external air taken into an air channel 2 decreases or the external air does not exist therein, the operating plate 52 of a wind pressure sensor 5 disposed in the channel 2 is disposed at a position where a receiving surface 50 which receives the wind pressure becomes a reflection mirror which reflects the combustion part 3a of the burner 3, and by finishing the receiving surface 50 up to a mirror surface, it is possible to observe the color of flame of vaporized gas burning at the combustion part by peeping from said opening part 21. |
