Indoor air flow conditions and distributions for specific purposes are usually called airflow organization. Generally speaking, the air from the air supply outlet into the room first forms the jet air flow, which flows to the room return air outlet is the return air flow, and the swirl air flow in the local space of the room.
What are the air distribution forms in the clean room? Ed's purification points out that there are mainly: 1. laminar flow form - top-down; 2. horizontal flow form - from left to right; 3. turbulent flow form.
1. Advantages of turbulence:
1) The filter and air treatment are simple.
2) The cost of equipment investment is low;
3) It is easier to expand the scale of production.
4) High cleanliness can be maintained when combined with the cleaning table.
2. Disadvantages of turbulence mode:
1) Indoor cleanliness is susceptible to the influence of workers.
2) Eddy current is easy to produce and polluted particles may circulate indoors.
3) The number of ventilation is low, so the time to enter normal operation is long and the power cost is increased.
3. Advantages of vertical laminar flow:
1) Not affected by the working status of indoor workers, it can maintain a high cleanliness.
2) High ventilation frequency, almost in operation at the same time can achieve a stable state;
3) There is very little dust accumulation or re-floating. The dust generated in the room is removed by airflow and quickly recovers from the polluted state to the clean state.
4. Disadvantages of vertical laminar flow:
1) The trouble of installing the final filter and the switch board can easily lead to the breakage of the sealing pad of the air filter.
2) The cost of equipment investment is higher.
3) It is difficult to expand the scale of production.
5. Advantages of horizontal laminar flow:
1) Because of eddy current, dead angle and other reasons, the chance of dust accumulation or re-floating is relatively reduced.
2) High frequency of air exchange, so the self-purification time is short.
3) The indoor cleanliness is not disturbed by the number of workers and their working conditions.
4) The buffer system of cloakroom, work clothes cleaning room, dressing room and air shower room need to be improved.
6. Disadvantages of horizontal laminar flow:
1) High cleanliness can be maintained near the suction surface, but the cleanliness decreases when it approaches the suction surface.
2) It is difficult to expand the scale of production;
3) The cost of equipment investment is higher.
4) The buffer system of cloakroom, work clothes cleaning room, dressing room and air shower room need to be improved.
From the above analysis, it can be seen that if all the purification systems in the operating room are designed as the above laminar flow mode, the cost of equipment and additional engineering will be higher. Therefore, in this case, the local laminar flow purification mode can be considered. In this way, it is not necessary to have such a high level of environmental cleanliness for a large area of a clean workshop, and in fact, it is very difficult for a clean workshop to achieve 100 levels of total cleanliness.
Above is provided by Ed Purification, hope to help you!
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