Disinfection transmission cabinAs a core isolation equipment in the fields of biomedicine, food processing, electronic cleanliness, etc., its operational stability is directly related to pollution prevention and control in clean areas. The following maintenance checklist is developed from three dimensions: daily, weekly, and monthly. Based on the characteristics of the equipment, operational standards and responsibilities are clearly defined to ensure disinfection and sterilization effectiveness and equipment lifespan.

　　1、 Daily maintenance: basic functions and cleaning guarantee (operator: on duty personnel)

-Appearance and sealing inspection: Wipe the exterior of the cabin and observation windows to remove floating dust and stains; After closing the two doors, check if the sealing strip is flat and undamaged. The gap between the doors should be ≤ 0.5mm to ensure a stable negative/positive pressure environment.

-Disinfection system function verification: Start the ultraviolet disinfection module, confirm that the lamp is emitting light normally (without flickering or blackening), and that the disinfection time setting meets the specifications (usually ≥ 30 minutes); If it is a hydrogen peroxide fumigation type, check that the fumigation device is sealed and leak free, and that the residual amount of the agent is within a safe range.

-Instrument and interlock function inspection: Check that the readings of the differential pressure gauge and temperature and humidity meter are normal (clean area differential pressure ≥ 10Pa, temperature 18-26 ℃, humidity 45% -65%); Test the double door interlock function to ensure that one side of the door cannot be opened when the other side is open, in order to avoid direct air pollution.

-Internal cleaning: Wipe the interior walls, shelves, and corners of the cabin with 75% medical alcohol, focusing on cleaning material placement traces to ensure no dust or stains remain; After cleaning, turn on the ventilation function for 10 minutes to eliminate residual disinfectant.

　　2、 Weekly maintenance: Deep maintenance of core components (operated by equipment maintenance personnel)

-Filter system inspection: Disassemble the primary air filter and blow it in reverse with compressed air (pressure ≤ 0.3MPa). If the filter material is damaged or heavily dusty, replace it; Check the pressure difference of the high-efficiency filter. If it exceeds twice the initial resistance, it should be reported for replacement in a timely manner.

-Maintenance of disinfection components: Clean the oil stains on the surface of the ultraviolet lamp tube, and use specialized test strips to detect the ultraviolet intensity (≥ 70 μ W/cm ², replace immediately if it is below the standard); Calibrate the hydrogen peroxide concentration sensor to ensure accurate drug injection (error ≤ 5%).

-Transmission and door lock inspection: lubricate the door body hinges and transmission mechanism to avoid switch jamming; Test the electromagnetic suction force of the door lock to ensure that it is securely locked without any looseness or abnormal noise after closing the door.

　　3、 Monthly maintenance: comprehensive calibration of system performance (operator: equipment engineer)

-Overall performance testing: Conduct a sealing test (pressure attenuation method) to ensure that the pressure drop is ≤ 5% within 30 minutes; Simulate the material transfer process and verify that the entire process of disinfection, ventilation, and door opening is linked normally without any program disorder.

-Electrical system inspection: Check for aging and loosening of power lines and wiring terminals, with a grounding resistance of ≤ 4 Ω; Calibrate temperature and humidity sensors and differential pressure transmitters to ensure data errors are within ± 0.5 ℃ and ± 1Pa range.

-Spare parts and record organization: Count the inventory of spare parts such as ultraviolet lamps and filters to ensure sufficient reserves within the validity period; Organize daily/weekly maintenance records, form equipment operation files, and promptly handle abnormal situations in a closed-loop manner.

During the maintenance process, it is necessary to strictly follow the principle of "who operates, who is responsible", and all maintenance projects must be recorded and signed. When problems such as damaged sealing strips or ineffective disinfection are found, immediately post a "stop use" sign and initiate emergency response to ensure that the disinfection transfer cabin is always in a safe and reliable operating state.