The dust prevention principle of dust cotton and dust net is mechanical filtration, that is, when the dust collides with the dust cotton and dust net, some large particles of dust will be adsorbed on the dust cotton and dust net through layer by layer barrier. However, fine dust is especially less than 5 μ M dust will pass through the mesh, so the dust-proof level of the cabinet can reach IP5 at most. The dust-proof cotton and dust-proof net are generally clamped between the pressing plate and the cabinet during assembly. When the pressing plate is a plastic part, the dustproof net and the pressing plate can also be injected together. After the cabinet is used for a long time, the dust-proof cotton or dust-proof net will absorb a large amount of dust, resulting in the reduction of mesh, which will affect the air inlet volume of the system. Therefore, the dust-proof cotton or dust-proof net shall be made into a removable structure for regular cleaning.
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