| 摘要 |
The present invention provides for a smoke detection chamber for use in a photoelectric smoke detector, the chamber being a generally parallelepiped having a mounting arrangement for a photoemitting diode located in a first end wall of the chamber. A second end wall of the chamber opposite the mounting arrangement is shaped to provide communication between the interior and exterior of the chamber while appearing as a solid surface to external ambient light and allowing a light beam from a photoemitting diode located in the mounting arrangement striking the second end wall to be reflected to the exterior of the chamber. In a preferred embodiment the second end wall is louvred to provide communication between the interior and exterior of the chamber such that a light beam from a photoemitting diode located in the mounting arrangement striking the second end wall would be deflected by the louvred end wall to the exterior of the chamber. |
