Clean room air purification project in the air supply system in the fresh air and return air conditioning unit in the air conditioning unit (AHU) within the mix, and then through a series of filtration and heat treatment through the air duct to the top of the clean room , And then through the top of the high efficiency filter into the clean room after filtration. Return air is located in the lower part of the clean room or at the top of the return air duct back to the air conditioning unit of the air conditioning unit. Return air in the air conditioning unit and then re-mixed with the new wind, this reciprocating cycle. This is the clean room air supply air return system work flow, is the clean room profession general practice.
From the economic point of view of energy-saving operation, this one return air supply system is more used in the cleanliness level is relatively low, the number of air supply ventilation is small, the total air volume is smaller, larger indoor heat, air temperature difference Of the clean room of the electronics industry, that is, to eliminate the waste heat, air humidity and air supply and purification of air supply volume similar or the same, no reheat or reheat smaller system is more reasonable and feasible. If the air volume is larger, indoor heat and smaller, air temperature difference is relatively small, the required reheat on the very large, very poor running economy.
This form of clean return air used in the purification level is lower ISO8, ISO9000, indoor high heat of the industrial clean room air supply system, that is, air conditioning and air supply the same or similar air supply System.