| 摘要 |
In a light scattering smoke sensor of the present invention, a first diaphragm portion (29) is disposed just aheat of a light receiving device, and a second diaphragm portion (30) is disposed ahead of the first diaphragm portion. A gap between the first and second diaphragm portion is a smoke introducing portion (31) which introduces smoke to a smoke detecting space via a gap between labyrinth members and the second diaphragm portion. <IMAGE> |
