风机过滤器机组空气动力全效率计算方法的探讨

要提出了风机单元(FFU中机箱与风机的集成,简称FU)空气动力全效率的概念与计算方法,基于FFU实验室测试标准IEST-RP-CC036.1测试了FFU的空气动力效率,并根据测试结果计算出FU的空气动力全效率。与实测所得FU空气动力全效率对比发现,在FFU常用面风速0.35m/s^0.45m/s范围内,空气动力全效率的计算值和实测值基本吻合,误差在±5%以内,证明了FU空气动力全效率计算方法的可靠性。

我国直流无刷型风机过滤器机组性能水平的试验探讨

测试了7个FFU厂家生产的14台直流无刷型FFU(规格为1200mm×1200mm)的空气动力性能、噪声、送风均匀性和过滤性能。分析测试结果表明:所测14台FFU的空气动力性能均符合所提的性能要求且各厂商能耗控制能力接近;虽然多数FFU机组噪声能满足JG/T 388-2012《风机过滤机组》规定的≤60.0dB(A)的限值,但与工程应用的要求仍有较大差距,需加大FFU噪声改善和控制的研究;有2台机组的送风均匀性未满足所提的性能要求,可通过调整箱体出风挡板的设置得到改善和提高;所测14台过滤器中,除了3台超高效过滤器的过滤效率,其它均满足所提要求,3台不合格的超高效过滤器主要是生产折纸过程滤纸受损,且因受测试能力限制,在出厂测试时未发现问题,建议各厂家应提高超高效过滤器过滤效率的测试能力。

电子工业洁净室风机过滤器机组关键参数检测方法

论文以某电子工业洁净室为背景,介绍了工程实践中风机过滤器机组(FFU)性能测试方法,可为电子工业洁净室FFU检测提供工程参考。

Study on Various Rectifiers for Fan-Filter Units

The face velocities of the high efficiency particulate air filters and the ultra low penetration airfilters in fan filter units (FFUs) have large relative standard deviation and turbulivity. It seriously affects the unidirectivity of the flow in the unidirectional flow clean zone and cleanroom. The cross contamination in this kind of unidirectional flow area is hardly controlled. It is significant to find optional method for keeping the face velocity uniformity of FFU and reducing the face velocity turbulivity of FFU, furthermore, to keep the cleanliness level under FFUs. The normal and easy method is to add flow rectifiers under filters. FFUs with various flow rectifiers have been tested. The uniformity and turbulivity of facevelocity under the FFU are presented in this paper. The influence of the facevelocity uniformity and turbulivity on the contamination boundary of the unidirectional flow is studiedas well.