The daily maintenance and upkeep of air showers in food factories focus on ensuring that they continuously and stably blow clean air and efficiently remove contaminants, thereby avoiding the risk of contamination in the clean area due to equipment failure.
Daily maintenance should revolve around the three core actions of “cleaning, inspection, and replacement”, and can be divided into daily, weekly, and monthly maintenance according to the cycle to ensure that all key components of the equipment are covered.

I. Daily Maintenance: Basic cleaning and functional inspection
It should be done before and after daily use. The key is to keep the inside and outside of the equipment clean and confirm that the core functions are normal.
Clean the interior of the air shower: Use a clean cloth dipped in food-grade disinfectant to wipe the floor, inner walls, door body, and infrared sensor of the air shower to remove residual dust and stains.
Check the air-blowing function: Start the air shower program and confirm that the air output from both nozzles is uniform, the wind force is strong, and there is no obvious abnormal noise or no air.
Check the sealing performance of the door body: Close both doors of the air shower room and observe whether the gaps are tight, preventing unclean air from the outside from directly seeping into the clean area.
Ii. Weekly Maintenance: In-depth inspection of components
Inspect the key components of the equipment every week to detect potential faults in advance.
Clean the primary filter: Open the side panel of the air shower, remove the primary filter, and either blow it in reverse with compressed air or rinse it with clean water (dry it and then reinstall it) to remove the accumulated dust on the filter screen.
Check the control panel: Confirm that the buttons, indicator lights, and time setting functions on the control panel are normal, and the air shower time (usually 10-30 seconds) meets the cleanliness requirements of the workshop.
Check the door lock and door closer: Test the interlocking function of the two doors (when one door is opened, the other cannot be opened), and ensure that the door closer bounces smoothly without any jamming or failure to close tightly.
Iii. Monthly Maintenance: Replacement of core components and system inspection
Conduct a comprehensive maintenance once a month, with a focus on the core components that affect the purification effect.
Check the high-efficiency filter: Determine whether the high-efficiency filter is clogged through the pressure difference gauge of the equipment (replacement is required when the pressure difference exceeds 1.5 times the initial value). During replacement, strictly follow aseptic operation to avoid contaminating the filter.
Check the fan and motor: Listen to whether the fan’s operating sound is normal, without any abnormal vibration or noise. Check whether the motor wiring is firm and whether there are any signs of looseness or overheating.
Clean the exterior of the equipment: Wipe the outer shell and signboards of the air shower to ensure that the appearance of the equipment is clean and the markings are clear and legible.
Iv. Maintenance Precautions
Personnel requirements: Maintenance personnel must wear clean suits and shoe covers. Before entering the air shower room, they need to follow the normal air shower process to avoid bringing in contaminants themselves.
Disinfectant selection: Food-grade, residue-free disinfectants (such as 75% alcohol, diluted peracetic acid) must be used. The use of highly corrosive cleaning agents is strictly prohibited to prevent damage to the surface of the equipment.
Record retention: Establish a maintenance ledger, detailing the date, content, model of replaced parts, and operator of each maintenance, to facilitate traceability and subsequent analysis.