What is the effect of airflow on the clean room?
The airflow in the clean room will affect the cleanliness, in other words, the movement and diffusion of dust generated by people, machine compartments, building structures, etc. are dominated by the airflow, which in turn affects the cleanliness. It is important to select the proper and stable airflow for the pharma clean room. The airflow in the clean room is an important factor affecting the performance of the clean room. Generally, the airflow speed of the clean room is between 0.25~0.5m/s. This airflow speed is a breeze area, which is easily disturbed by the actions of people, machines, etc., and tends to be chaotic. Although increasing the wind speed can suppress the influence of this disturbance and maintain cleanliness degree, but the increase in operating costs will also increase. In order to achieve a stable effect on the cleanliness of the clean room, the maintenance of uniform airflow is an important factor. If the uniform airflow in the clean room cannot be maintained, it means that the wind speed is different, especially on the wall surface, the airflow will have a vortex effect along the wall surface, and it is actually difficult to achieve high cleanliness at this time. If the vertical laminar flow direction is to maintain a uniform airflow, it must: (a) the wind speed on the blowing surface must not have speed differences; (b) the wind speed on the suction surface of the floor return board must not have speed differences. When the speed is too low or too high (0.2m/s, 0.7m/s), eddy currents will occur, while at 0.5m/s, the airflow is more uniform. At present, the wind speed of general clean room is taken between 0.25~0.5m/s. The airflow factors affecting the clean room, such as process equipment, personnel, clean room assembly materials, lighting fixtures, etc., and the distribution point of the airflow above the production equipment should also be included in the influencing factors. The air flow distribution point on the surface of the production console or production equipment should be located at 2/3 of the distance between the clean room space and the partition board. When the operator is working, the air flow can flow from the inside of the process area to the operation area, and the dust belt If the distribution point is arranged in front of the process area, it will become an improper airflow distribution. At this time, most of the airflow will flow to the process area, and the dust caused by the operator's operation will be brought to the back of the equipment. Clean room workbench As a result, it will be polluted, and the product good rate will be reduced. The cleanliness level that meets the requirements of the clean room should be supplied at the most appropriate wind speed to achieve economical results.
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