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How does ffu cleanroom supply and return air?
How does ffu cleanroom supply and return air?FFU cleanroom is a kind of cleanroom with a fan filtration unit. It has many advantages such as modularity, reusability, flexibility, and shortened construction cost, so it has been widely used in recent years. The working principle is the FFU fan from the top of the air intake and filtered by the primary and high-efficiency filters, filtered clean air in the entire air surface to 0.45M / S ± 20% of the wind speed uniform speed sent out. This kind of clean room can provide high-quality clean air for clean rooms and microenvironments of different sizes and cleanliness levels.FFU clean room air supply method is usually used for centralized air supply, decentralized air supply, and FFU plus fresh air unit and dry coil three types of air supply. Take one of the air supply methods as an example, the centralized air supply is the clean air of the clean room all through the air conditioning room located in the air handler for pre-purification and heat and humidity treatment, and then sent to the clean room of the upper technical mezzanine with large fans and large ducts, which relies on high pressure to overcome the high-efficiency filters (HEPA) or ultra-high-efficiency filters (ULPA) full of resistance in the ceiling, the filtered clean air into the clean room, achieving the clean room, clean air, the clean room. The filtered clean air is sent into the clean room to achieve a production environment with class 100, class 10, or class 1 cleanliness and the required temperature and humidity parameters. The return air from the clean room enters the lower technical mezzanine through the movable floor grille, and then the large air duct is pumped by the fan to the air treatment machine in the air-conditioning room, and then it is mixed with the outdoor fresh air to repeat the purification and heat and humidity treatment. This is repeated in a continuous cycle of operation. |
