潮湿引起感烟火灾探测器误报研究

针对潮湿现象成为典型的火灾探测误报源 ,在火灾探测综合模拟实验平台中 ,通过收集水沸腾形成的水雾进行加湿 ,研究了冬季与夏季潮湿环境 ,对散射型光电感烟火灾探测器的发生误报影响。通过比较探测器的输出值与其附近湿度变化曲线 ,从原理上分析了误报发生的原因。实验结果表明 :在气温较低的冬季 ,水蒸气较易形成液态小水珠 ,容易导致感烟探测器误报警 ,而在夏季由于气温较高 ,这种情况较难发生。对相对湿度较高或达到饱和湿度 ,以及非火灾因素的雾气或微细水珠 ,对感烟探测器可靠性的影响 ,开展下进一步的工作进行了展望

Study on the False Alarms of Smoke Detector Caused by Moisture

False alarms of scattering photoelectric smoke fire detector caused by the moisture, one of the typical nuisance alarm sources, is experimentally in vestigated. This is accomplished by the Fire Emulator/Detector Evaluator (FE/DE) with the water vapor produced from the boiling water in winter and summer. The humidity curve near the fire detector was compared with the output of the smoke fire detector to analyze the cause of false alarms. The results show that the sc attering photoelectric smoke fire detector tends to give false alarm due to the water vapor could easily form water droplets at low temperature in winter. Howev er, it is not the case in summer. Finally, the further study is anticipated.