Daily maintenance of clean booths

A clean booth is an air purification unit that can provide a local clean environment and is often used in industries with high requirements for cleanliness, such as electronics, semiconductors, and food. Its daily maintenance is crucial for maintaining cleanliness and extending the service life of the equipment. The following is the detailed content of the daily maintenance of the clean booth:
I. Daily cleaning and maintenance
Cleaning frequency: Surface cleaning should be carried out at the end of daily production or before and after each use.
Cleaning steps and methods
Ceiling and four walls: Use a lint-free cloth dipped in a special cleaner (such as ethanol, isopropyl alcohol) to gently wipe and remove surface dust and stains. Do not use ordinary clothes or materials with fiber shedding to prevent secondary pollution.
Floor: Use a dust-free mop with neutral detergent to mop the floor. If there are stubborn stains on the floor, you can use a dust-free mop to wipe them. After cleaning, it should be dried in time to avoid water accumulation.
Transparent curtains/doors: If the clean booth is equipped with transparent curtains or doors, they should be wiped regularly to remove fingerprints and dust to keep the view clear. At the same time, check whether the curtain fabric is damaged or aged and replace it in time.
The surface of the equipment: The surfaces of the equipment and instruments inside the clean booth need to be cleaned simultaneously to ensure no dust accumulation. Precision parts such as the operation panel can be gently wiped with a lint-free cloth.
Ii. Maintenance of Air Purification Systems
Filter inspection and replacement
Primary filter: Generally, it should be inspected once every 1-2 weeks. If there is obvious dust on the surface (such as turning gray), it can be removed, rinsed with clean water or neutral detergent, dried, and then reinstalled. If the filtration efficiency drops after 3 to 5 cleanings, it should be replaced in a timely manner. The replacement cycle is usually 3 to 6 months, depending on the usage frequency and environment.
High-efficiency filters: The filtration efficiency should be tested at least once a year (the particle concentration in the clean booth can be detected by a dust particle counter). If the cleanliness does not meet the standard but the primary filter is in good condition, it may be that the high-efficiency filter has failed and needs to be replaced in time. The replacement cycle of high-efficiency filters is generally 2 to 3 years, but it may be shortened in highly polluted environments or under frequent use.
Fans and air supply systems
Regularly (monthly) check whether the operating sound of the fan is normal, and whether there is any abnormal noise or vibration. If any abnormality is found, stop the machine to inspect the motor, belt, and other components. If necessary, have it repaired by professionals.
Check whether there is any air leakage or damage in the air supply ducts, and whether the sealing rubber strips at the pipe connections are aged. Repair or replace them in time to ensure the air supply efficiency.
Iii. Maintenance of Electrical and Control Systems
Electrical component inspection: Check weekly whether the switches and terminal blocks in the distribution box are loose, and whether the wires are aged or damaged to avoid the risk of short circuit or leakage.
Control panel maintenance: Keep the surface of the control panel clean and check if the operation buttons are sensitive. If any problems, such as button malfunction or abnormal display screen, are found, contact technicians for repair promptly.
Lighting system: Check if the lamps are lit up normally. If any tubes are damaged, replace them in time. At the same time, clean the dust on the surface of the lamps to ensure the brightness of the lighting.
Iv. Maintenance of Structure and Sealing
Frame inspection: Every month, check whether the frame of the clean booth (such as aluminum alloy profiles, steel structures) is loose or deformed, and whether the screws and connecting parts have fallen off. Tighten or reinforce them in time.
Sealing performance test: Regularly (quarterly) check the sealing performance of the clean booth. This can be done through smoke tests or by observing a differential pressure gauge (if equipped). If any gaps are found to be leaking air, they should be filled with sealant or the sealing strips replaced.
Door and window tightness: Check whether the doors and Windows are tightly closed and whether the door locks are functioning properly to prevent external contaminants from entering.
V. Monitoring and Recording
Cleanliness monitoring: Use a dust particle counter or differential pressure gauge to monitor the cleanliness and differential pressure inside the clean booth every day (if there are differential pressure requirements in the design), record the data, and promptly investigate the cause if any abnormality is found (such as filter failure, air leakage, etc.).
Temperature and humidity monitoring: If the clean booth has requirements for temperature and humidity, the temperature and humidity data should be recorded daily to ensure they are within the specified range (such as temperature 20-25℃, humidity 40%-60%). When there are abnormalities, check the air conditioning or dehumidification equipment.
Maintenance records: Establish a dedicated maintenance ledger, detailing the time, content, and problem-solving status of each cleaning, inspection, and component replacement, facilitating traceability and the formulation of subsequent maintenance plans.
Vi. Handling of Special Circumstances
Emergency response to contamination: In the event of liquid leakage, dust spread, or other contamination incidents within the clean booth, operations must be immediately halted. Use lint-free cloths and specialized cleaning agents for local cleaning, and add disinfection steps (such as spraying disinfectants). If necessary, retest the cleanliness.
Long-term shutdown maintenance: If the clean booth needs to be out of use for a long time (more than one week), it must be thoroughly cleaned before shutdown, with doors, Windows, and fans closed. If necessary, cover it with a dust-proof cloth. Before restarting, the fan should be turned on and run for 1-2 hours in advance, and the cleanliness should be rechecked.
Vii. Personnel Operation Norms
Before entering the clean booth, you need to change into dust-free suits and shoes, wear masks and gloves to avoid bringing in external contaminants.
Smoking, eating, or performing operations that generate dust are strictly prohibited in the clean booth. Keep the booth clean and tidy.
Regularly train the operators to ensure they are familiar with the usage and maintenance norms of the clean booth, and avoid affecting the performance of the equipment due to improper operation.
Through the above comprehensive daily maintenance measures, the cleanliness and stability of the clean booth can be effectively guaranteed, the risk of equipment failure can be reduced, the service life can be prolonged, and the production environment can be ensured to meet the requirements. If you have professional maintenance needs, it is recommended that you contact the clean booth manufacturer or professional technicians for handling.