Brief Introduction And Development History Of Air Filters

In pneumatic technology, the air filter, the pressure reducing valve and the oil atomizer are called pneumatic three big pieces. In order to obtain a variety of functions, these three kinds of air source processing elements are often assembled together in order, called pneumatic triplet. Used for air source purification, filtration, pressure reduction and lubrication.

The prototype of an air filter is a respirator that people use to protect their breath. As far back as the first century in Rome, it is recorded that men were protected by masks made of coarse hemp while they purified mercury for a long time after that. Air filters have also made progress, but they are mainly used as respiratory protection devices in some hazardous industries, such as the production of hazardous chemicals. In 827, Bouton discovered the motion of tiny particles, which led to a further understanding of the mechanism of air filtration. The rapid development of air filter is closely related to the development of military industry and electronic industry in the 1950s, the United States on the glass fiber filter paper production technology for in-depth research, so that the air filter has been improved and developed. In the 1960s, HEPA filters were introduced. In the 1970s, HEPA filter with fine glass fiber filter paper as filter medium, the filtration efficiency of D. 3 micron particle size was 99.9998. Since the 1980s, with the emergence of new testing methods, the improvement of the use of evaluation and the improvement of filtration performance requirements, serious problems have been found in HE-PA filters, so a higher performance ULPA filter has been produced.