Definition and classification of industrial clean room
Clean rooms are mainly classified according to indoor cleanliness, airflow form, control objects, indoor net height and structural characteristics. According to the indoor cleanliness classification, it is mainly divided into Class 1, Class 10, Class 100, Class 10000, Class 10000. According to the air flow, it is classified into unidirectional flow, vector flow and turbulent flow. According to the control object classification, it is divided into industrial clean room and biological clean room. The former takes suspended dust in the air as the control object, and the latter takes suspended biological particles (microorganisms) as the control object. Classified by indoor height, it is divided into low-level clean room and high-level clean room. The former indoor clear height is less than 3m, the latter is more than 3m.
1. Turbulent clean room
The indoor air state is generally sent from the top like indoor air with air conditioning equipment, and is exhausted through a return air outlet provided at an appropriate position in the room. This air supply method uses a dilution method to achieve purification purposes, that is, after the indoor dusty air is diluted by clean air, the dust concentration is reduced. As long as the turbulent clean room is properly managed, it can achieve a level of 10,000 cleanliness.
2. Unidirectional flow clean room
The main feature is that the airflow speed is low, the streamlines are parallel, the distribution is uniform, and the indoor air is not disturbed. Therefore, there is no particle flying on the ground and working surface, and it is not easy to form a local dead angle. High cleanliness level is an ideal form of air flow organization. The unidirectional flow clean room can be divided into vertical unidirectional flow clean room and horizontal unidirectional flow clean room according to the air flow direction.