The effect of the air filter on the PM2.5 control The effect of the air filter on the PM2.5 control The purification system must control the PM2.5. The air filter must have the following requirements:
1. Primary air filter
The primary air filter is generally used as the first process of fresh air treatment, and is mainly used for filtering particles of 5 μm or more.
2.HEPA high efficiency air filter
HEPA high efficiency air filters are a multi-layer purification technology that is currently widely used. The filter media is made of fine glass fibers and is very similar in thickness and texture to blotting paper. HEPA high efficiency filters have long been considered to have a minimum removal rate of 99.97% for all 0.3 micron and larger particles. According to the standards of the American Lung Association, it can be called a “real†HEPA high-efficiency filter, and the proportion of particles penetrating the filter media must be no more than three-tenths of a percent.
Qualified high efficiency air filters are the main force in removing PM2.5 from fresh air. Whether it is inorganic particles, organic particles or microbial particles, as long as it is not less than 0.3 μm in diameter, a satisfactory removal effect can be obtained.
However, if the aperture of the filter device is only limited to the removal of PM2.5, it does not fundamentally solve the problem of fresh air quality. Because only aerosol-like pollutants in the outdoor air are removed, and for gaseous pollutants with a diameter of only about 0.001 μm, HEPA is also “open doorâ€. On the other hand, the damage caused by PM2.5, even the formation process of PM2.5 itself, is closely related to gaseous pollutants. If most of the gaseous pollutants cannot be rejected from the door and window at the same time, they can be converted into PM2.5 under certain conditions after entering the room. Therefore, molecular grade filtration must be performed on fresh air, which is the gas pollution filter to be mentioned below.
Wonnie Wind Purification Technology Co., Ltd. is a professional air filter manufacturer. For more products, please refer to the company website:
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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