1. The materials used for filtering particulate matter are mineral fiber, natural fiber or synthetic fiber. The filter fiber filter mechanism for filtering particulate matter in the air is divided into five types, which can work in a comprehensive manner.
2. Settling effect: Large particulate matter is settled on the filter material under the influence of gravity in the airflow and separated from the airflow.
3. Inertial impact: When the particles in the airflow bypass the filter fiber that is blocked in front of the airflow, the higher mass particles will deviate from the direction of the airflow due to the inertia and hit the filter fiber to be filtered.
4. Interception: The particles are located on the streamline closest to the filter material in the airflow, and the particles are intercepted by the filter material "scratching" because the radius of the particles is greater than the distance between the streamline and the filter material.
5. Diffusion: affected by the thermal motion of air molecules, extremely tiny particles are impacted by air molecules, constantly changing the direction of movement, presenting Brownian motion, and randomly contacting the filter material fibers to be filtered down.
6. Electrostatic effect: If the filter material fiber has a weak static electricity, no matter whether the particulate matter in the air flow is electrostatic or not, when they are close to the filter material fiber, they are easily attracted by the static electricity and are filtered down. The electrostatic effect can help the filter material Increase filtration efficiency while increasing airflow resistance.
