I. System Composition and Material Analysis
1.1 Main Frame Structure
The return air column system uses a combination of high-strength aluminum alloy profiles:
Aluminum Base Channel: As the load-bearing foundation, 6063-T6 anodized profiles are used, with a channel depth of 50mm, wall thickness of 2mm, and an anodized coating thickness ≥15μm.
Angle Aluminum Reinforcement: Special L30×30×2mm cleanroom angle aluminum with conductive oxidation treatment ensures surface resistance in the range of 10⁴-10⁶Ω.
1.2 Airflow Channel Design
The return air system adopts a symmetrical bilateral design:
Return air duct clear width: 400mm, internally lined with perforated aluminum panels (aperture Φ3mm, perforation rate 28%).
A 50mm thick fiberglass sound-absorbing layer is installed at the back, with an NRC (Noise Reduction Coefficient) ≥0.85.
The airflow guide system uses 45° inclined baffles spaced 80mm apart to ensure laminar flow transition.
1.3 Sealing Transition Components
The system employs a triple-sealing guarantee:
Aluminum Alloy Inside Corner Column: R30mm arc transition design with pre-installed EPDM sealing strips.
Aluminum Alloy Outside Corner Column: 88° convex angle design with integrated anti-dust guide slopes.
Sealant System: Two-component silicone sealant with post-curing elongation ≥300%.