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working principle and structure
The working principle and structure of the partitioned high-efficiency air filter can be elaborated as follows:
Working Principle:
The partitioned high-efficiency filter primarily relies on various effects of the filter media, including interception, inertial impaction, diffusion, gravitational settling, and electrostatic attraction. These effects work in concert to retain particles, microorganisms, and other pollutants on the surface of the filter media, thereby purifying the air.
Interception: As airborne dust particles move with the airflow, when they reach the surface of the filter media, they are directly intercepted and adhere to the media due to its fibrous structure.
Inertial Impaction: Larger dust particles, moving with inertia in the airflow, deviate from the airflow direction due to their inertia and collide with the filter fibers, getting captured.
Diffusion: Very small dust particles (e.g., less than 0.1 microns) undergo irregular Brownian motion. These particles continuously collide with gas molecules, increasing the randomness of their movement trajectories, thereby enhancing the chances of collision and capture by the filter fibers.
Gravitational Settling: Although the effect of gravitational settling is negligible for most microscopic dust particles, larger particles (e.g., greater than 0.5 microns) detach from the airflow streamline and settle on the filter media surface under the influence of gravity.
Electrostatic Attraction: In some cases, the filter media and dust particles may acquire charges, generating an electrostatic effect. This effect alters the particle trajectories, making it easier for them to collide with and be captured by the filter fibers. It also helps the particles adhere more firmly to the filter media.
Structure:
The partitioned high-efficiency filter typically consists of the following components:
Frame: Made of materials such as aluminum alloy, aluminum frame, or galvanized sheet, providing sturdy structural support for the filter.
Partitions: Utilizing materials like cardboard, aluminum foil, etc., these partitions divide the filter media into multiple filtration units. This partitioned design precisely maintains the distance between pleats, enhancing filter media utilization.
Filter Media: Employing ultrafine fibers as filter materials, such as glass fibers, which possess high filtration efficiency, capable of capturing minute airborne dust particles.
Sealant Strips: Made of flame-retardant materials, these strips ensure airtightness between the filter and the mounting frame, preventing unfiltered air from entering the cleanroom directly.
In summary, the partitioned high-efficiency air filter, through its unique structure and multifaceted filtration mechanisms, effectively captures and purifies airborne pollutants, providing a reliable air purification solution for various cleanroom environments.
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