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What are the precautions for the daily maintenance of clean sheds and clean rooms?
What are the precautions for the daily maintenance of clean sheds and clean rooms?The daily maintenance of a clean shed and clean room needs to pay attention to personnel, equipment, environment, and other aspects to ensure its cleanliness and normal operation. The following are specific precautions:Personnel management Training and dress: Personnel entering the clean shed or clean room must undergo special training to understand the operating procedures and precautions in the clean area. Wear work clothes, shoe covers, masks, hats, etc. that meet the cleanliness requirements, and ensure that the clothing is clean and tidy without shedding. Code of conduct: Limit the number of people in and out, reduce unnecessary walking and action, and avoid excessive dust. Personnel should avoid strenuous exercise and fast walking indoors to prevent dust from flying caused by airflow disturbances. Equipment maintenance Purification equipment: Regular inspection and maintenance of fan filter unit (FFU), air conditioning unit, air filter, and other purification equipment. Check FFU operating status to ensure that the fan works normally and the wind speed meets the requirements; Regular replacement of all levels of air filters, according to the filter resistance and use the time to determine the replacement cycle, the general primary filter 1-3 months to replace once, 3-6 months to replace the medium filter, high-efficiency filter 1-2 years to replace once. Other equipment: Regular cleaning and maintenance of production equipment and experimental instruments in the clean area to prevent dust and bacteria from breeding on the surface of the equipment. The repair and maintenance of the equipment should be carried out outside the clean area. If it must be carried out in a clean area, appropriate protective measures should be taken to avoid pollution in the clean environment. Environmental cleanliness Daily cleaning: Clean the floor, walls, and countertops of the clean shed or clean room every day, using special cleaning tools and cleaners, and avoiding the use of cleaning materials that are easy to produce dust. Cleaning should be carried out from the inside out and from top to bottom, cleaning the high and inside areas first, and then cleaning the low and outside areas. Regular disinfection: Regular disinfection of clean areas, can be used ultraviolet radiation, chemical disinfectant spray, or wiping methods. Commonly used chemical disinfectants include hydrogen peroxide, peracetic acid, 75% ethanol, etc. Appropriate disinfectants should be selected according to different disinfection objects and environments, and attention to the concentration, action time, and use method of disinfectants to avoid damage to personnel and equipment. Monitoring and recording Cleanliness monitoring: Regularly monitor the cleanliness of the clean shed or clean room, including suspended particles, microorganisms, and other indicators. Particle counters, floating bacteria samplers, settling bacteria samplers, and other equipment can be used for monitoring, and the monitoring frequency is determined according to the cleanliness level and production process requirements. Generally, 10,000 clean areas are monitored once a week and 100 clean areas are monitored once a day. Temperature, humidity, and pressure difference monitoring: real-time monitoring of the temperature, humidity, and pressure difference in the clean area to ensure that it meets the design requirements. The temperature is generally controlled at 18-26 ° C, the humidity is controlled at 45%-65%, and a certain pressure difference should be maintained between different clean areas to prevent air counterflow and cross-pollution. Record and report: record all maintenance operations and monitoring data in detail, and establish a sound maintenance file and monitoring report system. Records include equipment maintenance time, replacement parts, cleaning and disinfection time, disinfectant usage, monitoring data, etc., in order to analyze the changing trend of the clean environment and identify potential problems. Material management Entering process: The materials entering the clean shed or clean room must be strictly cleaned and disinfected. After the outer packaging is removed or the surface is wiped and disinfected, the materials enter the clean area through the transfer window or buffer room. The transfer of materials should follow the principle of one-way flow to avoid cross-contamination. Storage requirements: Materials should be stored in the specified area, sorted, and placed neatly to avoid accumulation and confusion. Shelves or containers for storing materials should be kept clean and disinfected regularly. For materials that are easy to produce dust or emit odor, sealing measures should be taken to prevent pollution to a clean environment. |
