| 摘要 |
<p>Device (10) for detecting a fire in a closed-off enclosure (12) such as a control panel, comprising means (18) for drawing air from the enclosure, two smoke detectors (20, 22) for continuously analyzing the air drawn from the enclosure and an alarm and control unit (24) connected to the smoke detectors for setting off a warning signal when one of the detectors analyzes and detects smoke in the air from the enclosure and setting off an alarm when the second detector also detects smoke in the air returned to the enclosure.</p> |
