Daily maintenance of air shower transfer Windows

Air shower transfer Windows are important purification equipment in clean workshops, laboratories, and other places, used to reduce cross-contamination when transferring items. The following are the key points for its daily maintenance to help ensure stable equipment performance and compliance with clean environment standards:
I. Daily Cleaning and maintenance
Surface cleaning
Wipe the inner and outer surfaces of the transfer window with a clean, soft cloth or non-woven fabric daily to remove dust, stains, and debris.
If there are stubborn stains, you can wipe them with a neutral detergent (such as a diluted solution of dishwashing liquid), and then rinse with clean water. Avoid using strong acids, strong alkalis, or corrosive solvents to prevent damage to the cabinet material (such as the stainless steel surface).
The glass observation window is cleaned.
Regularly clean the glass surface to keep the view clear. You can use a glass cleaner or an alcoholic cotton ball to wipe it, but avoid scratching the glass.
Filter cleaning (primary filter)
The primary filter needs to be inspected regularly. If there is obvious dust on the surface (generally once every 1-2 weeks, the specific frequency depends on the usage frequency and environment), it should be taken out and rinsed with clean water or the dust should be cleaned with a vacuum cleaner.
After rinsing, it needs to be dried before being reinstalled to avoid moisture affecting the filtration effect.
Note: The high-efficiency filter (located at the end of the air supply system) should not be disassembled and cleaned by yourself. It needs to be regularly inspected by professionals (such as once a year). If the resistance exceeds the standard or the service life is too long (usually 3-5 years), it needs to be replaced as a whole.
Ii. Component Function Inspection
Fan and air shower functions
Before each use, turn on the air shower mode and check whether the fan is operating normally (without abnormal noise or vibration) and whether the wind speed meets the design requirements (generally, the air shower wind speed is ≥20m/s).
If a significant drop in wind speed is observed, it might be due to a clogged primary or high-efficiency filter. The filter should be cleaned or replaced in a timely manner.
Door body and sealing performance
Check whether the double doors of the transfer window are tightly closed and whether the sealing strips are intact to prevent air leakage and affect the cleanliness.
Ensure that the interlocking function of the two doors is normal (that is, when one side door is opened, the other side door cannot be opened). If the interlocking fails, the machine should be stopped immediately for maintenance to prevent cross-contamination.
Electronic control system
Check whether the control panel buttons and indicator lights are normal and whether the air shower time setting (usually 10 to 30 seconds) is accurate.
If there is any malfunction of the keys, display screen failure, or program abnormality, professional personnel should be contacted for repair to avoid disassembling the circuit components without authorization.
Lighting system
Regularly check whether the internal lighting fixtures are working properly. If the bulbs are damaged, they should be replaced in time (it is recommended to use explosion-proof or dust-proof lamps and cut off the power before replacement).
Iii. Operating Environment Management
Temperature and humidity control
Ensure that the temperature and humidity of the environment where the transfer window is located meet the equipment requirements (generally temperature ≤40℃, humidity ≤85% RH), to prevent component rusting or electrical failure caused by high-temperature and high-humidity environments.
Item Transfer Regulations
When passing items, handle them gently to avoid hitting the inner walls or filters.
Flammable, explosive, strongly corrosive, or high-temperature items are strictly prohibited from being passed on to prevent damage to equipment or potential safety hazards.
After the transfer is completed, close the double doors in time to keep the transfer Windows in a sealed state.
Iv. Regular Maintenance Plan
Maintain the operation content of the project cycle
The primary filter should be taken out for cleaning or vacuuming after 1 to 2 weeks of cleaning, and the wear condition should be checked. Replacement should be considered after 6 to 12 months of cumulative use.
Check the operating status of the fan every week by listening to the running noise, touching the temperature of the casing (if there is no abnormal heating), and recording whether the operating current is stable.
High-efficiency filters are inspected annually by professional institutions to test their filtration efficiency and resistance. Based on the results, a decision is made on whether to replace them (generally, they should be replaced after 3 to 5 years of use).
The comprehensive maintenance of the electrical system should be carried out every six months. Check the connection and grounding of the circuits, tighten the screws, and test the interlock function and the effectiveness of the emergency stop button.
Sealing rubber strips should be replaced every 1 to 2 years. If the rubber strips age, crack, or lose their elasticity, they should be replaced in time to ensure air tightness.
V. Handling of Abnormal Situations
Insufficient wind speed: It may be due to a clogged filter or a faulty fan. The filter needs to be cleaned or replaced, or the tightness of the fan belt should be checked (if there is a belt drive structure).
Door interlock failure: Check the door magnetic switch, relay, or control circuit. If damaged, replace the components.
Abnormal noise: It may be due to dust accumulation on the fan impeller, worn bearings, or loose components. The machine needs to be shut down for inspection and the damaged parts should be tightened or replaced.
Leakage or tripping: Immediately cut off the power supply, check if the circuit is damaged and if the grounding is good, and have it repaired by a professional electrician.
Six. Maintain record management
Establish a "Maintenance Ledger for Air Shower Transfer Windows", detailing the time, content, and fault handling of each cleaning, inspection, and component replacement, to facilitate the traceability of equipment operation status and the formulation of preventive maintenance plans.
Keep the vouchers and reports of important maintenance such as filter replacement and professional inspection as a reference basis for equipment management.
Through the above daily maintenance measures, the service life of the air shower transfer window can be effectively prolonged, its purification effect can be guaranteed, and the pollution risk in the clean workshop can be reduced. If the equipment experiences complex malfunctions or exceeds the maintenance capacity, it is essential to contact the manufacturer or a professional maintenance team for handling to avoid equipment damage or safety accidents caused by self-operation.