Air filter development history

The prototype of the air filter is a respiratory protection device that people use to protect their breathing. According to records, in Rome in the first century, when the mercury was purified, it was protected with a mask made of coarse hemp for a long time. 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 1827, Bu Peng 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 was closely related to the development of the military industry and the electronics industry. In the 1950s, the United States conducted in-depth research on the production process of glass fiber filter paper, which improved and developed the air filter. In the 1960s, HEPA filters were introduced; in the 1970s, HEPA filters using fine glass fiber filter paper as a filter medium were used for D. The particle filtration efficiency of the 3 micron particle size is as high as 99.9998. Since the 1980s, with the emergence of new test methods, improved evaluation of use, and improved filtration performance requirements, HE-PA filters have been found to have serious problems, resulting in higher performance ULPA filters. At present, countries are still working hard to study, and it is estimated that more advanced air filters will appear soon.

Significant progress has also been made in the design of the filter itself, the most important of which is the removal of the separator, ie the development of a separatorless filter. The non-separator filter not only eliminates the risk of the partition plate damaging the filter media, but also effectively increases the filter area, improves the over-twisting efficiency, and reduces the airflow resistance, thereby reducing energy consumption. In addition, the air filter has made great progress in high temperature resistance, corrosion resistance, waterproofing and antibacterial, and has met some special needs. .

Significant progress has also been made in the design of the air filter itself, the most important of which is the removal of the dividing panels, ie the development of a non-separator filter. The non-separator filter not only eliminates the risk of the partition plate damaging the filter media, but also effectively increases the filter area, improves filtration efficiency, and reduces airflow resistance, thereby reducing energy consumption. In addition, the air filter has made great progress in high temperature resistance, corrosion resistance, waterproofing and antibacterial, and has met some special needs.

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