| 摘要 |
PURPOSE:To raise the circulation efficiency of air and to improve the dust collecting capacity by providing two ultraviolet ray detecting sensors to detect a flame and changing the direction of the discharge air or the suction air according to the difference of time when each sensor detects the flame. CONSTITUTION:The ultraviolet ray detecting sensors 2, 3 detecting the flame of lighter or match are respectively disposed at both ends in front of a main body 1. When a flame 14 is located at a position A, both sensors 2, 3 detect is at the same time and a stepping motor 13 is put into operation to move the blades of louver to turn to the direction A so that the discharge air is flowed to the direction A and the air of direction A is sufficiently circulated. When the flame 14 is located at the position B or C, the detecting times of the sensors 2, 3 are different, and the stepping motor 13 moves the blades 9 of louver to turn to the direction B or C so that the circulating direction of air is adjusted. As a result, the air circulation of the place where the flame is generated is promoted and the dust collecting efficiency is improved. |
