Operation and Maintenance Specification for Cargo Air Shower

I. Equipment Definition & Core Functions

The cargo air shower serves as a mandatory passageway for materials entering a cleanroom. Its core function is to provide a dual safeguard of "Logistics Purification" and "Environmental Isolation."

Surface Purification: Utilizes high-velocity clean airflow to effectively remove floating dust and contaminants from cargo surfaces.

Airlock Isolation: Forms an airlock chamber via a double-door electronic interlocking structure, preventing unpurified outside air from infiltrating the clean zone and maintaining internal environmental stability.

II. Purification Process & Working Principle

The equipment operates on a closed-loop principle of "Filtration → Blowing → Circulation," with the specific process as follows:

Airflow Generation: The fan starts and draws in ambient air. The air first passes through a Primary Filter (G4 Class) to intercept large dust particles and fibers, then enters the static pressure box.

Deep Filtration: The air further passes through a High-Efficiency Filter (H13 Class, 99.99% efficiency @ 0.3μm), forming a highly clean airflow.

High-Speed Blowing: The clean airflow is ejected from multiple angles onto the cargo surface via rotatable nozzles (spherical or slot type) at a high velocity of 22-30 m/s, forcefully stripping attached contaminants.

Circulation Purification: The dust-laden airflow falls and re-enters the primary filter for filtration. This cycle repeats to continuously maintain the cleanliness of the blowing zone.

III. Core Structure & Material Specifications

Box Structure: Adopts a sealed welding process with a smooth, dust-free surface. Materials available are SUS304/201 Stainless Steel (thickness ≥1.2mm) or cold-rolled steel with baking paint.

Filtration System: Utilizes graded filtration, consisting of a primary filter (non-woven fabric/chemical fiber) and a high efficiency filter (HEPA/ULPA).

Air Supply System: Equipped with high-efficiency, low-noise fans. Performance requirement: Air volume change ≤10% when air pressure changes by 50%, accompanied by vibration damping and sound insulation devices.

Nozzle System: Options include spherical nozzles (diameter≥20mm, adjustable angle≥90°) or slot nozzles, ensuring full surface coverage of the cargo.

Control System: Integrates Infrared Induction (automatic triggering), Electronic Interlock (double doors), adjustable timing, and emergency stop protection.

Door Configuration: Uses safety glass doors or stainless steel doors, equipped with sealing strips, and features a manual opening function during power outages.

IV. Maintenance & Upkeep Key Points

To extend equipment lifespan and ensure purification effectiveness, focus on the following four aspects during daily use:

Fan Inspection: Ensure operation is free of abnormal noise and vibration, with stable air velocity.

Nozzle Cleaning: Regularly inspect nozzles to ensure they are free of blockages and looseness, and that the spray angle is correct.

Door Sealing: Check that sealing strips are intact, ensuring the doors open/close flexibly and seal tightly.

System Debugging: Verify that the control system induction is sensitive and indicator lights are functioning normally.

1. Dual-speed fan

2. Primary filter

3. Stainless steel nozzle

4. Gel-sealed HEPA filter

5. Tempered glass window

6. Indicator light

7. Emergency stop switch

8. Infrared sensor

9. Control panel

10. Leveling foot bolt

11. Imported door closer