What is antibacterial function heat exchanger fin

Fins are metal components attached to the surface of heat exchange devices, which improve heat transfer efficiency by increasing the heat exchange surface area. They are mainly used in scenarios such as boiler economizers and air coolers that require enhanced heat transfer. Antibacterial fins are fan coil/surface cooler fins with antibacterial coatings added on top of ordinary hydrophilic aluminum foil fins. The substrate is still aluminum foil and is usually paired with copper tubes. They are an upgraded version of finned heat exchangers, specifically designed for wet condensation conditions.

The principle of antibacterial fins is to add antibacterial ingredients such as silver ions (the most mainstream), titanium dioxide, quaternary ammonium salts, etc. to the coating of the fins. In the humid and condensed water environment of the fins, they inhibit the colonization and reproduction of bacteria, molds, and biofilms on the surface of the fins. It is not through ultraviolet radiation or filter screens that antibacterial agents are used, but rather through the surface function of the fins themselves.

The advantages of antibacterial fins are as follows: 

1. Reduce coil odor and supply air odor: During refrigeration and dehumidification, the fins remain moist, which is a high-risk area for mold. Antibacterial fins reduce mold odor from the source; Kitchen fan coil units are particularly suitable

2. Delaying fouling and biofilm formation on fins: Biofilm increases thermal resistance, leading to poor heat transfer and reduced air flow. Antibacterial fins can extend the cleaning cycle

3. Improve the air quality of the supply air, suitable for high hygiene scenarios such as hospitals, wards, laboratories, schools, high-end residences, kitchens, etc

4. The coating is very thin, and normal qualified products will not significantly affect heat transfer efficiency and wind resistance.

Compared with ordinary hydrophilic fins, ordinary hydrophilic fins only solve drainage and corrosion prevention problems, without antibacterial ability. After being damp for a long time, mold growth and odor may occur, while antibacterial fins can effectively improve this situation. But the cost of antibacterial fins is higher. MECO's E style duct type fan coil unit currently uses antibacterial fins to better adapt to home decoration environments and improve user comfort.