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本文针对高等级生物安全实验室中绝大多数屏障隔离设施排风高效过滤器不能用扫描法检漏而只能采用低精度的全效率法检漏的现状,及其实际应用困难,采用实验方法对钠焰法、光度计法和计数法在检漏测试中的应用可行性、全效率检漏与扫描检漏测试精度差别及复杂现场条件对全效率检漏的影响进行了研究。研究结果表明:3种检测方法对有漏孔高效过滤器的测试结果基本相当,其中,局部透过率相对偏差大都在1.3%~13.3%之间,整体透过率相对偏差大都在4.5%~22.2%之间。全效率法与扫描法测试结果差异明显,同一漏孔滤器整体透过率仅为局部透过率的2.4%~6.1%,而过滤器下游弯头或风机的存在进一步导致整体透过率衰减为局部透过率的0.9%~4.6%。
In this paper, most of the high-level biosafety laboratory exhaust barrier filter efficiency screening device can not be leak detection by scanning method can only be used low-precision full-efficiency leak detection of the status quo, and its practical application difficulties, using experimental methods The feasibility of the sodium flame method, the photometric method and the counting method in the leak detection test, the difference between the full efficiency leak detection and the scanning leak detection precision and the complex field conditions on the full efficiency leak detection were studied. The results show that the test results of the three kinds of detection methods are basically equivalent to those of the leaky hole high efficiency filter. The relative deviations of the partial transmittance are mostly between 1.3% and 13.3%, and the relative deviations of the overall transmittance are mostly 4.5% 22.2% between. The difference between full efficiency and scanning test results is obvious. The overall transmittance of the same leaky filter is only 2.4% ~ 6.1% of the local transmittance, while the downstream elbow or fan of the filter further causes the overall transmittance to decline as Local transmittance of 0.9% to 4.6%.