The cleanliness of clean rooms is often affected by airflow. In other words, the movement and diffusion of dust generated by people, machine compartments and building structures are controlled by airflow. Now, Ed Purification Engineering Company will talk about the characteristics of the air flow in the dust-free room.
On the one hand, the air flow in the dustless room in Shandong Province is an important factor affecting the performance of the dustless room. Generally, the air flow velocity of the dustless room is between 0.25 and 0.5m/s. This airflow velocity belongs to the breeze area, which is easy to be disturbed by human and machine actions and tend to be chaotic. Although increasing wind speed can restrain the disturbance and maintain cleanliness, the increase of operation cost will be affected by the increase of wind speed. Therefore, when the required cleanliness level is met, the most appropriate wind speed can be supplied to achieve appropriate wind speed supply to achieve economic results.
On the other hand, to achieve the stabilization effect of the dust-free chamber, the uniform airflow is also an important factor. If the uniform airflow can not be maintained, it means that the wind speed varies. Especially on the wall, the eddy current will occur along the wall. It is very difficult to achieve high cleanliness at this time.
In order to maintain uniform air flow in the vertical laminar direction, it is necessary to:
(1) There must be no difference in wind speed on the blowing surface;
(2) There is no difference in the velocity of the suction surface of the floor return air plate. The phenomenon of eddy current occurs when the velocity is too low or too high (0.2m/s, 0.7m/s), while the air flow is more uniform at the speed of 0.5m/s. At present, the air velocity in the general dust-free chamber is between 0.25 and 0.5m/s.
There are many factors affecting the airflow of Shandong dustless room project, such as process equipment, personnel, dustless room assembly materials, lighting appliances, etc. At the same time, the diversion point of airflow above the production equipment should also be considered.
The air flow diversion points on the surface of general operating table or production equipment should be located at the distance of 2/3 between the dust-free room space and partition board, so that the airflow can flow from the inside of the process area to the work area, and the dust can be taken away. If the diversion point is located in front of the process area, it will become an improper diversion of air flow. At this time, most of the air flow will flow to the process area, and the dust caused by operator operation will be brought behind the equipment, so the worktable will be polluted and the yield will inevitably be reduced.
In dust-free room, there will be eddy current at the adjacent places, and the cleanliness will be relatively poor near the work table. Drilling air return holes on the work table will minimize the eddy current phenomenon. The selection of assembly materials and the improvement of equipment layout are also important factors for whether air flow becomes eddy current. Edward Purification has been developing in the field of clean Engineering for many years, and has implemented a series of workshop purification projects. For some difficult projects, it has been perfectly completed through excellent technical strength and well-trained construction team of clean engineering. To learn more about the medical purification industry, please pay attention to the Wechat Public No. Aide-188 (Ed Purification and Oxygen Supply)
Edward Purification has been developing in the field of clean Engineering for many years, and has implemented a series of workshop purification projects. For some difficult projects, it has been perfectly completed through excellent technical strength and well-trained construction team of clean engineering. To learn more about the medical purification industry, please pay attention to the Wechat Public No. Aide-188 (Ed Purification and Oxygen Supply)