The filtration method of electrostatic dust collection technology of air purifier

　　(1) Sieve effect When the size of the gap between the media composition (fibers, sieves, corrugated metal, etc.) is smaller than the particle diameter, the filter is designed to capture these particles. This principle is widely used in most filter designs and depends entirely on particle diameter, media spacing and media density.

　　(2) Inertial effect: The rapid change of air direction and the principle of inertia are used to separate a large number of (particles) from the airflow. Particles at a certain speed tend to maintain that speed and keep going in the same direction. This principle generally applies if the process particle concentration is high. And, [indoor air purifiers] in many cases, both the pre-filter mode and the more efficient final filter use this principle.

　　(3) Interception effect: In order to achieve interception, a particle must enter from within a fiber radius distance. The particles thus come into contact with and adhere to the fibers. The difference between the interception principle and the embedding principle is that the intercepted particles are smaller and their inertia is not sufficient to keep the particles running in a straight line. It therefore flows with the air until it comes into contact with the fibers.

　　(4) Brownian motion: Dust smaller than 1 μm does not move with the airflow, but performs "Brownian motion" due to the impact of air molecules. Captured if impinging on filter fibers. Therefore, the smaller the particle, the more intense the Brownian motion, and the better the filtering effect.

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