What is the working principle of the clean pass box?

The daily maintenance and care of the clean pass box are crucial for its normal operation and maintaining a good clean effect. The following are some common methods:
Cleaning
External cleaning: Wipe the external surface of the pass box with a clean damp cloth every day to remove dust, stains, etc. For stubborn stains, a mild cleaner can be used for wiping, but it is necessary to avoid the cleaner flowing into the interior of the transfer window.
Internal cleaning: Open the pass box regularly (it is recommended to do so at least once a week), and wipe all corners inside with a clean cloth, including the top plate, side plates, bottom plate, and the inner surface of the door, etc. Special attention should be paid to cleaning the dust and debris on the surface of the filter to prevent excessive accumulation and affect the filtration effect.
Glass cleaning: The glass observation window of the pass box should be kept clear and transparent to observe the internal situation. Wipe the glass with a glass cleaner and a clean soft cloth to avoid scratching the surface of the glass.
Filter maintenance
Regular inspection: Check the resistance of the high-efficiency air filter once a month. It can be judged by checking the differential pressure gauge. If the differential pressure exceeds the specified range, it indicates that the filter may be clogged and needs to be dealt with.
Cleaning and replacement: The primary filter is generally cleaned once every 1 to 2 weeks. If the filtration effect remains poor after multiple cleanings, it should be replaced promptly. High-efficiency filters are usually replaced every 1 to 2 years. However, if the usage environment is harsh or they are used frequently, the replacement cycle should be shortened according to the actual situation. When replacing the filter, make sure that the specifications and models of the new filter are consistent with those of the original one, and install it correctly to ensure good sealing.
Maintenance of ultraviolet lamps
Check the lamp tube: Before each use, check whether the ultraviolet lamp can light up normally and whether there is any obvious blackening or damage on the surface of the lamp tube. If the lamp tube is found not lighting up or emitting light abnormally, it should be replaced in time.
Record the usage time: The sterilization effect of ultraviolet lamps will gradually decrease with the increase in usage time. Generally, the effective service life of ultraviolet lamps is 1000 to 2000 hours. It is necessary to record the usage time of the ultraviolet lamp. After reaching its service life, new lamp tubes should be replaced in time to ensure the disinfection effect.
Maintenance of the electrical system
Check the wiring: Inspect the electrical wiring of the transfer window once a month to see if there is any loosening, damage, aging, or other phenomena. If any problem with the wiring is found, it should be promptly repaired or replaced by a professional electrician to prevent electrical faults.
Test function: Regularly test various functional buttons of the transfer window, such as the door opening and closing button, ultraviolet lamp switch, fan switch, etc., to ensure their normal operation. At the same time, check whether the alarm device of the transfer window can operate normally, such as the alarm for the door not being closed tightly or the alarm for the filter being clogged.
Maintenance of sealing performance
Check the sealing parts: Inspect the sealing strips, door seals, and other sealing components of the transfer window once every quarter to see if there is any aging, deformation, damage, or other conditions. If there are any problems, the sealing parts should be replaced in time to ensure the sealing performance of the transfer window and prevent external contaminants from entering.
Test the sealing effect: The sealing effect of the transfer window can be tested through some simple methods. For example, when the transfer window is closed, insert an A4 paper between the door gaps. After the door is closed, the paper should be difficult to pull out, indicating that the sealing effect is good. If the paper is easy to pull out, it is necessary to check the sealing part and make adjustments or repairs.