Filter and Mask Design Cleaned by ITU with UV Radiation

by İTÜ | Apr 28, 2020
Assoc. Dr. Ali Gelir, faculty member from Physics Engineering Department of Faculty of Arts and Sciences, and his team have designed an “Ultraviolet (UV) Based Active Filter Mask”, which can be used continuously in the fight against coronavirus.

ITU faculty member Assoc. Dr. Ali Gelir and his team working in our Physics Engineering Department laboratories designed a mask with an active filter. The microorganism tests of the mask, which is designed as a mouth-nose mask and a full-face mask, are carried out in Istanbul University Cerrahpaşa Faculty of Medicine, Istanbul University Cerrahpaşa Forensic Medicine Institute and Koç University Microbiology Laboratories.

Airborne microorganisms eliminated

The active filter in the masks, where the design studies are carried out in ITU Physics Engineering laboratories, is located in a closed system with channels similar to the nasal canals. Inside these channels, there are LEDs designed in the “SMD” (surface mount device) case and radiating in the UVC region. The closed system prevents UV rays from harming people using this filter.

The air intake into the filter channels takes place through the holes on the filter edges. By replacing passive mechanical filters in front of these holes, it is ensured that the air passing through the channel is both mechanically filtered and exposed to UV radiation to make harmful microorganisms that can be transported by air become inactive (ineffective).

Ability to be used continuously

Besides the fact that the designed filters can be used continuously instead of disposable, the fact that their filters can be changed makes a difference. Thanks to the LEDs used in the filter, any failure condition is detected immediately and the filters are replaced.

ITU Physics Engineering Laboratories working group, which makes the entire design of the mask and filter, continues to work on a special coating that will be used on the inner surface of the channels and allow trapping of microorganisms.