Applications of FFU in the electronics industry
Release Date:2020-05-13 09:36
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The manufacturing process of electronic products is extremely sensitive to changes in air temperature and humidity, so the air temperature and humidity in the clean room must be controlled with high precision. Cleanroom air conditioning systems currently generally adopt DDC automatic control systems.
The MAU+DC+FFU clean air conditioning system is a combination of a make-up air unit (MAU) + dry coil (DC) + fan filter unit (FFU) system.
In this system, outdoor fresh air is pre-filtered (G4/F8) by the combined outdoor fresh air unit (MAU), undergoes heat and humidity treatment, and is then sent to the top of the clean room. The MAU adjusts the indoor humidity. The dry coil (DC) mainly eliminates indoor humidity and heat to control the indoor temperature; the circulating return air passes through the dry coil to remove humidity and heat when it goes from the return air wall to the top. The FFU is responsible for the cleanliness of the room and is installed on the ceiling keel ceiling. The outdoor fresh air treated by the MAU and the return air treated by the DC are pressurized by the FFU fan, filtered through a high-efficiency air filter, and then sent into the room.
Compared with the traditional MAU+AHU+HEPA system, the MAU+DC+FFU clean air conditioning system has the following advantages:
1. The system is very flexible and can control the cleanliness of the clean room by increasing or decreasing the number of FFUs. This is almost impossible for conventional centralized air supply purification systems.
2. The air supply is uniform and stable. Because it has its own fan, it avoids the problem of air volume balance at each air supply outlet in the centralized air supply system, which is particularly advantageous for vertical unidirectional flow clean rooms.
3. Significant energy saving. The FFU system has very few ducts. Except for the fresh air delivered by ducts, a large amount of return air is circulated, thus greatly reducing duct resistance losses.
4. Space saving. Because the supply and return air ducts are omitted, installation space can be saved. It is very suitable for renovation projects with tight ceiling heights, and the short construction period is due to the few ducts.
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