基于EN 779-2012标准测试方法研发新型分层滤料过滤器
Development of a novel layered gradient filter based on test method by EN 779-2012
摘要：
分析了一般通风用过滤器的作用和选择原则，对比了我国和欧盟的测试标准GB/T 14295—2008和EN 779-2012。利用测试台对国内两种过滤器（A，C）和国外某产品B进行性能测试，获得了材料厚度、过滤器阻力、过滤效率及微观形貌。通过品质因素分析，发现过滤器A对细颗粒物的品质因素最优，达到0.102，其滤料具有低阻高效的特征，在一定的支撑力下，可以提供更大的三维空间，提高容尘效率与拦截效率。过滤器B对细颗粒物的品质因素为0.077，原因是滤料内部均匀分布，能提供较高的过滤效率。过滤器A的工艺与过滤器B的工艺相结合是未来技术发展方向。
Abstract：
Introduces the function of general ventilation air filter and its selection principle, and compares the test methods between GB/T 14295—2008 in China and EN 779-2012 in EU. Performs the performance test among air filters A, B and C with the test rig. Obtains the thickness, resistance, filtration efficiency and microscopic morphology. With the analysis of quality factor, the performance of filter A is the best for PM2.5, which reaches 0.102. Filter A has the characteristic of low resistance and high efficiency, where the dust holding capacity and interception efficiency are increased by the enlarged three-dimensional space with the strong holder. The quality factor of filter B reaches 0.077. Filter media B has the uniform distribution of fibers, which can increase the efficiency. The combination of the process for material A and material B should be the future trend.
Keywords:general ventilation air filter, efficiency, resistance, scanning electron microscope, quality factor