How to improve the purification effect of an ordinary pass box?

Here are some ways to improve the purification of a regular pass box:
First, optimize the UV sterilization system
Increase UV intensity and duration
Choose higher-power UV lamps. In general, the higher the power of the ultraviolet lamp, the greater the ultraviolet energy emitted per unit of time, and the better the sterilization effect. For example, replacing the traditional 15W ultraviolet lamp tube with a 30W lamp tube can enhance the sterilization ability.
At the same time, appropriate extension of UV exposure time. By adjusting the control system of the pass box, the irradiation time can be extended from the usual 10-15 minutes to 20-30 minutes. However, it should be noted that too long exposure may cause damage to some items that are not resistant to ultraviolet light, so the appropriate exposure time should be determined according to the characteristics of the transmitted items.
Improved UV exposure Angle and range
Design a more rational lamp layout. Ultraviolet light tubes can be installed at multiple angles inside the pass box to ensure that ultraviolet light can shine to all corners of the transfer window. For example, UV lamps are installed on the top, sides, and bottom of the pass box, so that all surfaces of the item are fully exposed to UV light.
Use mirrors to enhance UV coverage. Specially designed mirrors are installed inside the transfer window to reflect ultraviolet light to some of the shadow areas that the lamp cannot direct, thus improving the comprehensiveness of sterilization.
Replace and maintain UV lamps regularly.
Establish a strict UV lamp replacement schedule. According to the service life of the UV lamp (usually 1000-2000 hours), the lamp is replaced regularly. The replacement time can be determined by recording the use time of the lamp or using UV intensity detection equipment.
Clean the UV lamp regularly. The dust and dirt on the surface of the lamp will affect the output intensity of the ultraviolet light, so the lamp should be cleaned regularly. You can use a clean soft cloth to gently wipe the surface of the lamp to ensure that the light transmission of the lamp is good.
Second, auxiliary air filtration measures
Install the primary filter.
The primary filter is installed at the air intake of the pass box for filtering large particles of dust, hair, and other pollutants. The primary filter can intercept impurities larger than 5 microns in size, reducing the amount of dust entering the interior of the transfer window.
Clean or replace the primary filter regularly. In general, the cleaning cycle of the primary filter can be determined according to the dust degree of the use of the environment, the dusty environment may need to be cleaned once a week, and the environment with less dust can be cleaned every 1-2 months. When the resistance of the filter increases to a certain extent or the performance cannot be recovered after cleaning, a new filter needs to be replaced.
Add a small fan circulation system.
Install a small fan to circulate the air inside the pass box. Through the action of the fan, the air can form a stable airflow cycle inside the pass box, allowing the ultraviolet light to act more evenly on the microorganisms in the air.
At the same time, combined with efficient air filtration devices, such as medium-effect filters, the circulating air is further filtered. The medium effect filter removes dust particles between 1 and 5 microns in size, further improving the air quality inside the pass box.
Third, strengthen the tightness and cleaning management of the pass box
Improve the tightness of the pass box
Check and replace the sealing rubber strip of the pass box. Aging or damage to the sealing strip will cause external air and pollutants to enter the pass box, so it is necessary to regularly check the integrity of the rubber strip and replace the damaged rubber strip in time.
Optimize the door structure of the pass box to ensure that the door fits tightly when closed. Better locks and clasps can be used to ensure that there are no gaps in the door when it is closed, thereby reducing the intrusion of external pollution sources.
Strengthen cleaning management
Establish a strict pass box cleaning system. Clean the inside of the pass box regularly, including wiping the inner wall, cleaning the lamp, cleaning the filter, etc. During the cleaning process, appropriate cleaning tools and cleaning fluids should be used to avoid introducing new sources of pollution.
Pre-clean delivered items. Before putting items into the pass box, remove dust, dirt, and other pollutants on the surface of the items as much as possible, which can reduce the purification burden of the pass box and improve the overall purification effect.