What should be noted in the daily use of air shower transfer Windows?

Air shower transfer Windows are key equipment for preventing cross-contamination in clean environments such as laboratories, pharmaceutical workshops, and electronic factories. Their daily use must strictly follow the operation norms to ensure the purification effect and equipment lifespan. The following are the key points to note in daily use
I. Before operation: Confirm the status of the equipment
Check the interlocking function of the door body
Before starting, test whether the interlocking of the two side doors is normal: Open one side door and observe whether the other side door is completely locked (cannot be pushed open). After closing the already opened door, try to open the other side door again to make sure it can open normally.
If the interlock fails (for example, both doors can be opened simultaneously), do not use it. Report for repair immediately to prevent the direct circulation of unclean air.
Check the status of the air shower system.
Observe whether the indicator lights on the control panel are normal (such as the power light and the air shower operation light), and confirm that there are no abnormal noises from the fan and filter.
If the airflow significantly weakens after the air shower is started (such as no air at the outlet or a decrease in wind force), it may be that the filter is clogged. It is necessary to record this and contact the maintenance personnel for replacement.
Clean up the internal space.
It is necessary to ensure that there is no residual debris, water stains, or contaminants inside the transfer window to avoid affecting the air circulation and purging effect.
Ii. During operation: Standardize the transmission process
Requirements for item placement
Items should be evenly placed to avoid being stacked too densely or blocking the air outlets/return air outlets (for example, if the top air outlet is covered, it will prevent the airflow from effectively sweeping).
Do not place items that exceed the size limit of the transfer window to prevent the door from failing to seal (gaps can cause air leakage).
Liquids and easily scattering powder items should be sealed and packaged before being placed into prevent leakage, contamination of the interior, or clogging of the filter.
Door body operation specifications
When placing or removing items, make sure to completely close the current side door before opening the other side door (even if the interlock function is normal, avoid forcefully pushing the door or not closing it tightly).
When closing the door, gently push it to the sealed state to ensure that the sealing strip of the door body and the frame fit tightly to prevent air leakage.
Air shower process control
After the items are placed in, close the doors on both sides. The air shower system will start automatically (for some models, you need to manually press the "Air Shower Start" button). Do not open the door in the middle to interrupt the air shower (it will cause the items that have not been purified to come into contact with the clean area).
The air shower time should be carried out according to the preset parameters (usually 10 to 30 seconds, adjusted according to the cleanliness requirements), and must not be shortened at will (for example, the electronic workshop is sensitive to 0.3μm particles, and it is necessary to ensure thorough purging).
If equipped with ultraviolet/ozone disinfection function, please note:
Do not open the door when the ultraviolet light is on (to avoid direct exposure to human skin and eyes).
After ozone disinfection, it is necessary to wait for the residual gas to be completely discharged (usually for more than 30 minutes) before opening the side door of the clean area to prevent ozone from irritating the human body.
Iii. Post-operation: Maintenance and Record-keeping
Clean up residual pollutants promptly.
After the transfer is completed, if there is any scattered dust or liquid inside, it should be wiped clean with a clean cloth (dipped in a disinfectant that meets the requirements of the clean area, such as 75% alcohol) to prevent residual contaminants from breeding bacteria.
When cleaning, avoid touching the high-efficiency filter (to prevent damage to the filter material). If there are obvious stains on the surface of the filter, notify the maintenance personnel for inspection.
Turn off the power of the device as needed.
When not in use for a short period, it can remain in standby mode (for convenient use at any time). If it is not used for a long time (such as more than 24 hours), the main power supply should be turned off to prevent the fan from idling and wearing out.
Record abnormal situations
If any abnormal noise, abnormal air shower time, flashing indicator light, or other problems occur during use, they should be recorded in detail in the "Equipment Operation Record Form" (for example, "The air shower did not start automatically after the east door was closed"), and promptly reported to the equipment management department.
Iv. Daily Maintenance: Extend the service life of equipment
Regular inspection of the filter
Primary filter (usually every 1-3 months): Open the panel for inspection. If there is too much dust on the surface (such as obvious dust layers), it needs to be cleaned or replaced in time (for washable primary filter materials, rinse with clean water, dry, and reuse).
High-efficiency filters (typically 6-12 months, adjusted according to usage frequency): They cannot be cleaned. It is necessary to determine whether they are clogged through air volume detection (if the air volume drops below 70% of the initial value). New filter materials must be replaced (operated by professionals to avoid leakage caused by improper installation).
Cleaning and disinfection
The inner walls of the transfer window and the sealing strips of the door body should be wiped with a clean cloth dipped in disinfectant every week (such as peracetic acid, which is commonly used in pharmaceutical workshops) to prevent the growth of microorganisms.
Ultraviolet lamp tubes need to be inspected regularly (such as every three months). If the lamp tubes turn black or their brightness drops significantly, they should be replaced in time (to ensure the sterilization effect).
Avoid illegal operations
Flammable and corrosive items are strictly prohibited from being placed in the transfer window to prevent equipment damage or safety accidents.
Do not lean on, step on the door body, or strike the frame or sealing strip with hard objects (wear of the sealing strip will cause the seal to fail).
V. Precautions for Special Scenarios
Sterile environment (such as operating room, biological laboratory): In addition to an air shower, ultraviolet/ozone disinfection should be combined, and the surface of the items needs to be disinfected a second time before and after transfer (such as by spraying alcohol).
Electronic cleanroom: It is prohibited to transfer items that generate static electricity (such as chips without anti-static packaging) to prevent static electricity from attracting dust and affecting the purification effect.
Summary: The core principles are "prevent leakage, ensure purging, and maintain frequently."
The key points for daily use lie in: ensuring the effective sealing and interlocking of the door body (to prevent leakage), standardizing the placement of items to ensure that the airflow sweeps without dead corners (to maintain purification), and regularly inspecting the filters and cleaning the equipment (to extend the service life). Only by strictly implementing these requirements can the "isolation + purification" function of the air shower transfer window be truly brought into play, maintaining the environmental safety of the clean area.