How does the air shower room ensure that the dust blown away will not contaminate the clean area again through its efficient filtration system?
Publish Time: 2025-01-21
The air shower room is a device used before entering the clean room. It is mainly used to remove dust and pollutants on people to prevent these pollutants from being brought into the clean area and affecting the quality of the product and the production environment. The air shower room ensures that the dust blown away will not contaminate the clean area again through its efficient filtration system.
1. High-efficiency filter
Principle: The air shower room is usually equipped with a high-efficiency air filter, such as a HEPA (High Efficiency Particulate Air) filter, which can capture more than 99.97% of 0.3 micron particles. The fiber structure of the HEPA filter can effectively intercept tiny particles, including dust, bacteria and other microorganisms.
Application: HEPA filters are installed in the air supply system of the air shower room to ensure that the air entering the air shower room is highly purified, thereby reducing the dust content in the indoor air.
2. Circulation filtration system
Design: The air inside the air shower room is continuously purified through a circulation filtration system. Air enters from the top or side air inlet, is purified by the HEPA filter, and then blows toward the surface of people or materials through the nozzle in the form of high-speed airflow to blow away the dust.
Cycle process: The blown dust and pollutants fall into the collection tank or self-cleaning floor at the bottom of the air shower room, and then are discharged to the outside through the exhaust system, and the purified air is recycled again.
3. Negative pressure design
Pressure control: The interior of the air shower room can be designed to be slightly negative pressure, that is, the indoor pressure is slightly lower than the external pressure. This can prevent the internal dust and pollutants from spreading outward, and also prevent the unpurified air from the outside from entering the air shower room.
Sealing: The door of the air shower room usually adopts a sealing design to ensure that it can effectively isolate the internal and external air exchange when closed, and maintain the internal air quality.
4. Air flow path
Directional airflow: The airflow inside the air shower room is usually directional, blowing from top to bottom or from both sides to the middle, ensuring that the dust is effectively blown off the surface of people or materials and discharged through the exhaust system at the bottom.
Avoid eddy currents: The design will minimize the eddy currents and stagnant areas of the airflow to prevent dust from settling in the air shower room and affecting the purification effect.
5. Regular maintenance and monitoring
Filter replacement: Regularly check and replace the HEPA filter to ensure that it is always in good working condition. The performance of the filter will gradually decline with the increase of usage time, and it needs to be replaced in time according to the manufacturer's recommendations and actual usage.
Air quality monitoring: Install air quality monitoring equipment at the air inlet and outlet of the air shower room to monitor the concentration of particulate matter in the air in real time to ensure that the purification effect meets the standard requirements of the clean room.
6. Self-cleaning function
Continuous purification: In addition to the blowing process when people or materials pass through, the air shower room can also continue to self-clean when idle to maintain the cleanliness of the indoor air.
Automatic program: The air shower room is usually equipped with an automatic control program, which can start the self-cleaning mode according to the preset schedule or trigger conditions to ensure that it is in the best purification state at any time.
Through the above measures, the air shower room can effectively remove dust and pollutants on the surface of people or materials, and through an efficient filtration system, ensure that the blown away dust will not pollute the clean area again, thereby maintaining the environmental quality of the clean room.
