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Filtration Principle and Function of Air Filter
Filtration Principle and Function of Air Filter1. Interception: dust particles in the air, with the airflow for inertial motion or irregular Brownian motion or by the action of some kind of field force and move, when the movement of the particles hit other objects, the existence of van der Waals force between the objects (is the molecules and molecules, molecular groups and molecular groups of the force between) so that the particles stick to the surface of the fiber.2. Inertia and diffusion: particles of dust in the airflow for inertial movement, when encountering the arrangement of messy fibers, the airflow changes direction, and the particles due to inertia deviate from the direction of the fiber and be bonded. The larger the particle, the easier the impact, the better the effect. Small particles of dust for irregular Brownian motion. The smaller the particles, the more violent the irregular movement, the more chances to hit the obstacles, and the better the filtering effect of the air filter will be. 3. Electrostatic effect: For some reason, the fibers and particles may be charged to produce an electrostatic effect. Electrostatic filter material filtration effect can be significantly improved, the reason: electrostatic so that the dust changes the trajectory and hit the obstacles, and electrostatic so that the dust in the media sticks more firmly. 4. Chemical filtration: chemical filters are mainly selective adsorption of harmful gas molecules, activated carbon material has a large number of invisible microporous, there is a large adsorption area, the size of a grain of rice in the activated carbon, the microporous internal area of more than ten square meters. |
