Photocatalyst, also called nano-titanium dioxide (TiO₂), produces highly oxidizing holes and free radicals when exposed to light of specific wavelengths, particularly ultraviolet (UV) light. These highly oxidizing substances effectively break down volatile organic compounds (VOCs) in the air, such as formaldehyde, benzene, toluene, and TVOC, as well as organic microorganisms like bacteria, viruses, and mold, oxidizing them into harmless carbon dioxide (CO₂) and water (H₂O). Unlike activated carbon adsorption filters, it does not trap pollutants within itself but instead destroys them, thereby avoiding issues of adsorption saturation and secondary pollution.
In recirculating air unit systems, microbial growth is a significant concern. The free radicals generated by the photocatalyst disrupt the cell walls/protein membranes of bacteria and viruses, rendering them inactive or dead. This is particularly important in densely populated spaces with high hygiene requirements, such as hospitals, schools, offices, and restaurants, as it effectively reduces the risk of airborne disease transmission.
Odors often originate from organic compounds. Photocatalyst can break down odor-causing molecules, such as those from smoke, food spoilage, pet odors, and bathroom smells, eliminating them at the source rather than masking them with fragrances.
Then why choose aluminum honeycomb photocatalyst filter?
First, aluminum honeycomb is not only a carrier, the structural design significantly enhances purification efficiency. It provides an extensive and uniform surface area, allowing air to fully contact the photocatalyst-coated walls, greatly increasing the probability of pollutant capture and decomposition.
Second, the regular honeycomb cells offer far less resistance to airflow compared to solid or irregular fibrous structures. This is critical for ceiling recirculating systems, as it ensures sufficient air volume, reduces fan energy consumption, and maintains quiet operation.
Third, aluminum material is robust, corrosion-resistant, and durable, ensuring a long service life for the filter. It can be cleaned and reused, reducing long-term maintenance costs.
The operating principle of the recirculating air ceiling system involves drawing indoor air into the ceiling space, where it is treated before being recirculated into the room. The aluminum honeycomb titanium dioxide air filter plays the role of chemical purification in this process.
Typically, the system has a physical pre-filter to capture large particles such as dust and hair, protecting subsequent equipment. Honeycomb TiO2-treated filter serves as the core filter, responsible for treating gaseous pollutants and microorganisms that the physical filter can’t capture.
To achieve better performance, recirculating air ceiling systems are also equipped with built-in ultraviolet (UV) lamps specifically designed to irradiate the photocatalytic filter, providing it with a continuous source of reaction energy to ensure efficient operation. Combined with the system’s temperature and humidity regulation functions, the honeycomb TiO2 filter delivers a healthy indoor environment that is temperature-controlled, humidity-adjusted, non-toxic, sterile, and free of odors.
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