Patent ID: 9297753
Filing Date: 2016-03-29
CPC Classification: G01N,G08B

Claim Text:
1. A photoelectric smoke sensor which detects smoke flowing into a housing by light, comprising: a light emitter provided by being faced with a detection region in the housing and emitting inspection light to the detection region; a light receiver provided at a position shifted from an optical path of the inspection light of the light emitter by being faced with the detection region and receiving diffused light which is the inspection light having hit the smoke and diffused, so as to detect the smoke; and first and second reflecting members provided in the housing and deflecting and reflecting the inspection light emitted from the light emitter so as not to enter the light receiver, wherein the first and second reflecting members extend on two sides of the detection region along an entire vertical extent of a first inner wall of the housing that is opposite the light emitter, the first and second reflecting members each having a respective inclined planar reflecting surface to reflect light emitted from the light emitter back to the detection region in a direction that is not directed to the light receiver, and wherein planes of the respective inclined planar reflecting surfaces intersect at an angle to form a V-shape in a horizontal cross-section of the photoelectric smoke sensor.