Clean room with air supply - filtration and purification - return air for circulation, can make dust, bacteria,
Particles and other solid particles are greatly reduced to achieve the corresponding degree of cleanliness to meet the needs of production. Simply put, clean room engineering is a phase with "airflow"
Close the project, then in the operation of clean room, the air flow is affected by those poisons?
Airflow pattern
Airflow forms are generally divided into turbulence and laminar flow. Turbulence is the irregular flow of air, while laminar flow is the flow of air in parallel. The purification principle of turbulence is "dilution". The purification principle of laminar flow is "piston out". Take the clean room as a cylinder, then laminar flow is a piston, and clean fresh air directly pushes out the indoor air. In the selection of airflow form, we need to take into account various factors.
Influencing factor
The airflow velocity direction is affected by the indoor cleanliness grade. The efficiency of the shallower selected under the corresponding cleanliness grade will affect the airflow velocity. If there is dust producing equipment in the room, a lower efficiency filter can be used to speed up the air exchange rate to ensure the indoor cleanliness, or a higher efficiency filter can be used to reduce the airflow velocity to save energy consumption.
2, the airflow will form backward to the obstacles, the continuous transmission of fresh air, resulting in the formation of flow in place. Therefore, the instruments and equipment in the clean room should be placed reasonably, and the return air holes can be drilled in the cooking surface of each operation to reduce the vortex representation to a lower level. The selection of interior decoration materials should also be reasonable and compliant, and the equipment should be planned well in advance to avoid the airflow becoming vortex as far as possible.
3. There are many air flow factors affecting dust-free equipment, such as process equipment, personnel, room assembly materials, lighting appliances, etc., which will have a certain impact on the air flow speed. Because it is also necessary to pay attention to the air distribution point on the surface of different equipment, it should be located at the 2/3 place between the clean room space and the operation plate, so as to ensure that the air flow can flow from the inside of the process area to the operation area when the operator is working. The dust will be taken away, if the diversion point is configured in front of the process area, it will become an improper airflow diversion, at this time most of the airflow will flow to the process area, the dust caused by the operation of the operator will be taken to the back of the equipment, the table will be polluted, the yield is bound to reduce.