| 摘要 |
The present invention relates to a smoke detector whose operation is based on the diffused radiation principle, wherein said detector comprises a measuring field (5) which can be accessed by smoke particles, which is located in a measuring chamber and upon which a radiation is directed from a radiation source (6). The diffused radiation entering the measuring field (5) is received by a radiation receptor (7). In order to obtain the best results from the radiation when detecting smoke particles, the measuring chamber is made in the shape of a hollow ellipsoid (3) having a reflective layer on its inner surface, the measuring field (5) is located on the first focal point (1) of the hollow ellipsoid (3) and the radiation receptor (7) is located on the second focal point (2) of said hollow ellipsoid (3). |
