Air Shower - Installation & Operational Guidelines

An air shower, also known as a clean air shower, purification air shower, air shower booth, air blow booth, air shower door, dust shower room or air shower tunnel, is a mandatory access passage to clean rooms, designed to minimize contamination introduced when entering and exiting clean room environments.

As a highly versatile local purification device, the air shower is installed between clean and non-clean areas. Personnel and goods must pass through the air shower before entering the clean zone; the filtered clean air blown out removes dust particles attached to the human body and goods, effectively blocking or reducing dust sources from entering the clean room.

Key Installation Points

1. When installed at the clean room entrance, there must be no gaps between the air shower and the clean room wall panels. If air leakage occurs, seal the joints with a caulking compound.

2. Ensure the equipment is installed horizontally, as an unlevel installation may affect door operation and equipment durability.

3. The air shower is available in base type and base-free type:

1. The base type can be leveled directly, with gaps sealed and finished with silicone sealant.

2. The base-free type must be fixed with expansion bolts first, then sealed and finished with silicone sealant.

Key Usage Points

1. Before entering the clean room, remove all outerwear and accessories in the outer changing room, and wear clean dust-free clothing, a dust cap, a face mask and clean gloves.

2. Upon entering the air shower, the outer door will close automatically. The infrared induction system will trigger the air shower to start operating for a 15-second blow cycle.

Factors Affecting Air Cleanliness of the Air Shower & Clean Room

1. Personnel working in the clean room must strictly follow clean room operation regulations. Keep all clean room doors and windows closed at all times. A buffer zone must be set up for the transfer of personnel and goods between clean and non-clean areas, and air shower equipment must be used to prevent air convection. Unauthorized personnel are not allowed to enter the clean room.

2. The air change rate of the clean room and the air supply volume of the air conditioning and purification system are the core internal factors for maintaining the clean room's positive pressure and cleanliness level, and both are restricted by the final resistance of various stages of filters in the purification system.

3. All equipment in the clean room requires regular, scheduled cleaning and maintenance by designated personnel. Ensure all cleaning materials and fluids comply with clean room management regulations.

4. Rational diversion of personnel flow and material flow is critical to maintaining the cleanliness of the air shower and clean room:

1. Verify that personnel change into clean garments and complete the air shower process before entry, and their dressing complies with clean room specifications. For production processes with ultra-high cleanliness requirements, personnel may need to take a shower before entering.

2. Verify that goods are repackaged and processed through the air shower before entry, and the repackaged materials meet clean room standards.

Maintenance and Upkeep

1. Regularly test all technical indicators of the equipment with professional instruments; take immediate corrective measures if any indicator fails to meet the specified parameters.

2. Remove and clean the filter media of the primary air filter at regular intervals based on actual usage.

3. If a decrease in air velocity is detected, first check if the surface of the primary air filter is blackened. Blackening indicates excessive dust accumulation and increased resistance—remove the non-woven fabric of the primary air filter for cleaning or replacement immediately.

4. If air velocity does not improve after cleaning or replacing the non-woven fabric, the HEPA (High-Efficiency Particulate Air) filter is clogged and causing increased resistance, and must be replaced.

5. To replace the HEPA filter: remove the air nozzle plate, take out the old HEPA filter, and install a new one with the same specifications and model. Align the arrow mark on the HEPA filter with the direction of airflow during installation, and ensure proper sealing to prevent air leakage.

6. After HEPA filter replacement, check the frame for no leakage, and conduct a test with a particle counter. The equipment can only be put into normal operation when all technical indicators meet the standards.

7. Regularly inspect and repair the electrical circuits; refer to the electrical schematic diagram for troubleshooting and maintenance if malfunctions occur.

8. Regularly maintain the air shower doors to ensure the electronic lock aligns with the lock hole, preventing lock bolt jamming.

9. The maximum operating temperature of the equipment is 50℃, and the use of open flame in and around the air shower is strictly prohibited.