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Purification air conditioning engineering is a type of air conditioning engineering that not only has certain requirements for the temperature, humidity, and wind speed of the air, but also has high requirements for the number of dust particles and bacterial concentration in the air. The classification of cleanliness levels is determined by the number of dust particles of different sizes per unit volume of air in the cleanroom. The higher the level, the lower the dust content. It can be divided into levels 0, 1, 10, and 100 from high to low.
The purification air conditioning project is turbulent flow type, where air enters the clean room through the air conditioning box, air ducts, and HEPA filters in the clean room, and then passes through the partition walls or elevated floors on both sides of the clean room. Return air. The airflow moves non linearly and exhibits irregular turbulence or vortex states. This type is suitable for cleanroom grades 1000-100000.
Advantages: Simple construction, low system construction cost, easy expansion of clean rooms. In some special use areas, dust-free workbenches can be used to improve the level of clean rooms.
Disadvantage: The fine dust particles caused by turbulent flow float in indoor space and are difficult to discharge, which can easily contaminate the process products. In addition, if the system stops running and is reactivated, it often takes a considerable amount of time to achieve the required cleanliness.