| 摘要 |
PURPOSE: By detecting the light scattered with the smoke flowing in and deciding the fire although the steam flows in the gum edge, the electro optical detection of smoke can prevent the incorrect report. CONSTITUTION: The gum edge(1) comprises the mount area and smoke influx unit. The mount area(20) has the emitting device and light receiving element. The emitting device examines the light inside the mount area. The light receiving element lights receive the light researched from the emitting device. The smoke influx unit has a plurality of walls and smoke inlet port. A plurality of walls(12) prevents from the external light entering a company in the smoke influx unit. The smoke inlet port is formed between the wall. |
