SMOKE SENSOR

摘要

To provide a smoke sensor for achieving excellent flow-in characteristics while preventing invasion of disturbance light to detection means for optically detecting smoke with a simple structure.SOLUTION: A blower 100 arranged inside a housing sucks circumferential air from a suction port 11, supplies the air to a detection area inside the detection means 110 for optically detecting smoke in the air, and discharges the air from an exhaust port 24. At least one of a passage from the suction port 11 to a detection area and a passage from the detection area to the exhaust port 24 is formed by bending at least in three axis directions along an air flowing direction.SELECTED DRAWING: Figure 21