Air showers are typically enclosed chambers or tunnels with two doors - one for entry and one for exit. When a person or object enters the air shower, the entry door automatically closes, and a pre-programmed cycle begins.
During the cycle, high-velocity air jets or nozzles, usually mounted on the walls, ceiling, and floor of the air shower, release filtered air at a rate of around 20 to 30 meters per second. This high velocity creates a laminar flow of air that effectively removes particles from the surfaces of the person or object.
The air jets are typically equipped with high-efficiency particulate air (HEPA) filters, which capture particles as small as 0.3 micrometers in diameter. The filtered air is directed towards the individual or object from all directions, ensuring thorough cleaning.
The duration of the air shower cycle can vary depending on the specific application and requirements. Typically, the cycle lasts for about 20 to 30 seconds, during which time the high-velocity air jets effectively remove particles from the individual or object.
Once the air shower cycle is complete, the exit door opens, allowing the person or object to enter the cleanroom or controlled environment. The process can be repeated for multiple individuals or objects entering the cleanroom.
Air showers can be equipped with various additional features to enhance their effectiveness and usability. These may include motion sensors to detect the presence of a person or object, interlocking doors to ensure proper sequence and prevent cross-contamination, and control panels for setting and monitoring the air shower cycles.
Regular maintenance and cleaning of air showers is important to ensure their continued effectiveness. This may involve cleaning and replacing the HEPA filters, inspecting and repairing any damaged or malfunctioning components, and keeping the air shower chamber clean and free from debris.
In summary, air showers play a crucial role in maintaining the cleanliness and integrity of cleanrooms and controlled environments. By removing particles and contaminants, they help minimize the risk of product contamination and ensure the quality and safety of the environment and products being produced.
