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working principle and structure
The working principle and structure of the Sub-High Efficiency Air Filter (SHEA) can be elaborated as follows:
Working Principle:
Physical Interception: SHEA employs synthetic fibers, glass fibers, or ultra-fine fibers as the filtration medium. The fineness of these fibers effectively intercepts airborne suspended particles such as dust, pollen, mold spores, etc. As air passes through the filtration medium, particles are physically trapped on the surface of the fibers.
Deep Filtration: Unlike primary filters, SHEA typically features a deeper filtration layer. This allows particles to be captured not only on the surface but also within the deeper layers of the filtration medium, enhancing filtration efficiency.
Aerodynamic Effects: The design of SHEA also considers aerodynamic effects like airflow distribution and pressure drop. By optimizing the thickness of the filtration medium and the design of airflow channels, it achieves higher filtration efficiency without compromising airflow velocity.
Chemical Stability: The filtration medium of SHEA generally exhibits excellent chemical stability, enabling it to resist chemical contaminants in the air, including organic gases and vapors.
Structure:
Frame: The filter frame is typically made of wood or galvanized steel sheets for sturdy structural support and protection.
Filtration Medium: The core component of SHEA, the filtration medium is composed of high-efficiency filter materials such as glass fiber paper and ultra-fine polypropylene fiber paper. These materials possess exceptional filtration efficiency and dust-holding capacity.
Dividing Plates (for partitioned filters): Some SHEA models incorporate dividing plates, separating the filtration medium into multiple independent filtration units. These plates, often made of offset paper or aluminum film, enhance the overall performance and stability of the filter.
Sealing Technology: To ensure the filter's sealability and uniform airflow, SHEA employs special sealing techniques, such as seamless sealing, to minimize air leakage and improve filtration efficiency.
Other Auxiliary Components: Including metal guards on the inlet and outlet sides and fixing screws, these components protect the filtration medium and ensure proper installation and usage of the filter.
Types:
SHEA can be classified into three types based on their construction: non-partitioned SHEA, partitioned SHEA, and W-V combined SHEA. Each type varies slightly in structure but adheres to the aforementioned working principles and structural design principles.
In summary, SHEA achieves efficient filtration through physical interception, deep filtration, aerodynamic effects, and chemical stability. Its structure comprises a frame, filtration medium, dividing plates (for partitioned filters), among other components, making it a highly versatile and marketable product with broad application prospects.
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