How to achieve zero escape of ultrafine particles in air filters

In modern life, air quality has attracted more and more attention. Whether it is a home, office or industrial environment, air filters, as core components of air purification equipment, play a vital role. Especially in combating ultrafine particles (such as PM2.5, viruses, bacteria, etc.), high-efficiency air filters can achieve a filtering effect of almost zero escape. So, how do these air filters achieve this goal?

1. The core of high-efficiency filtration technology: HEPA filter
HEPA (High Efficiency Particulate Air filter) filter, that is, high-efficiency air particle filter, is the most important technology for removing particulate pollutants in the air. HEPA filter can absorb 99.97% of suspended particles with a size of 0.3 microns, which has become the gold standard for measuring high-efficiency air filters. It is made of a variety of materials, including PP filter paper, glass fiber, composite PPPET filter paper, polyester non-woven fabric and melt-blown, etc. The selection of these materials is aimed at maximizing filtration efficiency and service life.

The working principle of HEPA filter is based on the combined effect of multiple filtering mechanisms, including diffusion effect, interception effect, inertia effect and screening effect. For ultrafine particles, especially those below 0.1 microns, the diffusion effect is particularly critical. These tiny particles come into irregular contact due to Brownian motion, and eventually come into contact with the filter fiber and are adsorbed. The interception effect is for particles between 0.08 and 2.5 microns in size. When they follow the airflow around the filter fiber, they will be intercepted by the fiber surface.

2. The support of electrostatic dust collection technology
In addition to HEPA filter, electrostatic dust collection technology is also an important means to achieve zero escape of ultrafine particles. Electrostatic dust collection uses a high-voltage electrostatic field to ionize the gas, so that the dust particles are charged and adsorbed to the electrode. This process not only acts on particles of 0.001 to 100 microns, but also effectively removes pollutants such as dust, soot, pollen, cigarette smell and kitchen fumes in the air. More importantly, the agglomeration of electrostatic dust collection can aggregate tiny particles into larger particles, making them easier to be captured by the filtration system.

3. Precision manufacturing and airtight design
Precision manufacturing of air filters is also the key to achieving zero escape of ultrafine particles. From the material selection of the filter element, fiber arrangement to the manufacturing process, every link is strictly controlled. In addition, the airtight design of the air purifier is equally important. If there is an air leak in the air purifier, the air will bypass the filter and lose the filtering effect. Therefore, ensuring that the air purifier has good airtightness is a prerequisite for achieving efficient filtration.

4. Regular maintenance and filter replacement
Although efficient air filters can achieve zero escape of ultrafine particles, regular maintenance and filter replacement are also indispensable. As the use time increases, the filter element will gradually become clogged and lose its filtering efficiency. Therefore, regular replacement of the filter element according to the manufacturer's recommendations is the key to keeping the air purifier running efficiently. At the same time, regular cleaning of the air purifier's housing and air inlet can also improve filtration efficiency and extend the life of the equipment.