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How do you control sources of contamination in a clean room?
How do you control sources of contamination in a clean room?1. Control the pollution of personnel. To control the contamination of personnel emissions, clean shed manufacturers should first control the number of people entering the clean shed, no standardized training for clean shed work shall not enter the shed. The entrants should comply with the work specifications of the clean shed, wearing neat clean work clothes, work gloves, masks, headgear, and purification shoes, through the clean channel the strict management of personnel entering and exiting the clean shed can be effective in preventing cross-pollution of the air. 2. Control the dust generated by the equipment in the production process. Clean shed production processes and equipment should have an excellent selection of materials, smooth and wear-resistant performance, and rotating and sliding parts are particularly important, and should minimize wear and dust generation. If neighboring clean shed exists on different levels of differential pressure, clean shed manufacturer prevent low clean area to high clean area diffusion of contamination the main method is to maintain a high clean area relative to the low clean area, low clean area relative to the no cleanliness control area has the appropriate positive pressure value. Keep the gradient pressure difference at all cleanliness levels, the purpose is to make the sequence of airflow from high cleanliness clean shed to cleanliness clean shed, from low cleanliness clean shed to the corridor and service area, and then when the door of the room is closed and then flow to the outside. This effectively reduces airborne contamination. 3. Air filters in the clean room. The end device of the clean shed purification system, the high-efficiency air filter or ultra-high-efficiency air filter, can effectively filter the air and particulate contaminants that the fan unit handles under normal conditions. If the end filter is damaged, or the seal between the filter and the support frame is cracked and the airtightness fails, the air not filtered by the high-efficiency air filter may carry a large number of contaminated particles into the room, and with the diffusion of the airflow, the scope of the hazard is very large, therefore, it is very important to check and replace the end high-efficiency filters before putting the clean shed into use. 4. Clean the materials and objects entering the shed. The materials, accessories, and packaging of the clean shed products themselves should be used without contamination. In the environment inside the clean shed is also the production and manufacture of products without contamination. So into the clean shed of a variety of product materials, parts should be by the requirements of pre-cleaning, do not meet the clean shed cleanliness control requirements of the material can only be cleaned after entering the clean shed. |
