Aspirating smoke detection system

The present invention provides a high precision and quick detection of smoke rapidly determined while aspirating smoke detection systems fire position. The suction-type smoke detection system comprising: a pipe for sucking air in each region to be inspected; photoelectric smoke detector, when the intake air in each of the regions to be inspected, the detected smoke in the air is mixed; and a control unit, intake air of said area of ​​inspection, and, with the photoelectric smoke sensor is electrically connected to receive the detection signal and processes. Wherein, the photoelectric smoke detector comprising: a smoke detecting section, for detecting smoke in the air inhaled; the intake port, is provided on the air inflow side of the smoke detecting section, the intake air directly to said area of ​​inspection, and, the intake port and extending to a proximal portion of the suction pipe with the examination target region; and a mating opening, provided at the air outlet side of the smoke detection portion, and an end portion of the pipe fitting.