History of Air Filters
Release time:
2021-10-08
The prototype of the air filter is a respiratory protective appliance that people use to protect their breath. According to records, as early as the first century in Rome, where they were in the purification of mercury when the mask made of crude hemp for protection in the long time after this. Air filters have also made progress, but they are mainly used as respiratory protection devices in some dangerous industries, such as the production of hazardous chemicals. In l827, Bupeng discovered the movement law of tiny particles, which made people have a further understanding of the mechanism of air filtration. The rapid development of air filters is closely related to the development of the military industry and the electronics industry in the 1950 s. The United States has conducted in-depth research on the production process of glass fiber filter paper, which has improved and developed air filters. In the 1960 s, HEPA filters came out; in the 1970 s, HEPA filters using fine glass fiber filter paper as filter media had a filtration efficiency of up to 99.9998 for particles with a particle size of D.3 microns. Since the 1980 s, with the emergence of new test methods, the improvement of use evaluation and the improvement of filtration performance requirements, it has been found that HE-PA filters have serious problems, and ULPA filters with higher performance have been produced. At present, countries are still working hard to study, and it is estimated that more advanced air filters will appear soon.
The design of the filter itself has also made significant progress, the most important of which is the removal of the partition plate, that is, the development of the filter without the partition plate. The non-partition filter not only eliminates the danger of the partition plate damaging the filter medium, but also effectively increases the filter area, improves the over-shaking efficiency, and reduces the airflow resistance, thereby reducing energy consumption. In addition, air filters have also made great progress in high temperature resistance, corrosion resistance, waterproof and anti-bacteria, meeting some special needs.
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