The role of UV purple lamp beads, single-band lamp beads, 265~280 lamp beads are germicidal lamp beads. In addition to the bactericidal effect, the dual-band lamp beads can effectively remove organic dyes, formaldehyde and other pollutants under the action of photocatalysts.
UVC LED germicidal lamp is currently the hotter ultraviolet disinfection lamp. Due to the UV LED cold light source, the UVC LED germicidal lamp does not need to be preheated like the traditional low-pressure mercury ultraviolet disinfection lamp, and the UVC LED germicidal lamp does not produce ozone or smell. In addition, UVC LEDs also have the characteristics of high luminous efficiency, low energy consumption, single wavelength, and long lifespan, which are the future of deep ultraviolet sterilization. Although UVC LED has great advantages, there are still some uncertainties at present, such as sterilization efficiency, heat dissipation issues and cost issues.
The selection of the ultraviolet sterilization band has a direct impact on the sterilization efficiency. Ultraviolet rays with a wavelength of 254nm have the strongest destructive power on the molecular structure of DNA and RNA in biological cells, so theoretically the sterilization effect is better, but the industry still has technical difficulties in the field of UVC LEDs. , UVC LED production in the 254nm band is still difficult to break through. This is because the shorter the band, the greater the difficulty, the lower the yield, and the higher the cost. Many chip makers have turned to UVC LEDs in the 265nm band to increase the efficiency of sterilization by increasing the power. Some UVC LED germicidal lamp manufacturers even choose the 270~280nm band. A single chip also went from the initial 1mW to 10mW, and then to 50mW, 100mW, and experienced the growth process from low power to medium power, and then to high power.
In addition to relying on the luminous efficiency of the chip, the increase of the power of a single UVC LED also needs to be achieved by increasing the size of the chip. However, the larger the chip size, the more fragile it is. The more power UVC LED chip is difficult to cut, the yield rate is low, and the more expensive it is. Therefore, the industry generally adopts the integration of multiple low-power chips to achieve high-power.
Increasing light transmittance is also an important means to improve sterilization efficiency. On the premise of ensuring reliability, UVC LED manufacturers use packaging materials with higher light transmittance as much as possible. At the stage of sterilization module design, the main consideration is to optimize the reflection of ultraviolet light inside the module to reduce optical power loss.
