1. Common wavelength range and its basis
Ultrasonic U-V Cleaner usually uses ultraviolet wavelengths mainly concentrated between 200-300 nanometers. Among them, the wavelength of 253.7 nanometers is the most common. The selection of this wavelength range is based on the destructive effect of ultraviolet rays on the DNA or RNA structure of microorganisms (such as bacteria, viruses, etc.). Ultraviolet photons have enough energy to be absorbed by the nucleic acid molecules of microorganisms when irradiated on microorganisms. In the band of 200-300 nanometers, especially at 253.7 nanometers, the energy of ultraviolet rays can just cause the formation of covalent bonds between adjacent pyrimidine bases on the nucleic acid chain of microorganisms, thereby forming pyrimidine dimers. This structural change will interfere with the genetic information transmission and replication process of microorganisms, and ultimately lead to the death of microorganisms or loss of reproduction ability, thereby achieving the purpose of sterilization and disinfection of the cleaner.
2. The effectiveness of different wavelengths for different objects
Ultraviolet rays of different wavelengths have different effectiveness for different cleaning objects during the cleaning process. At a wavelength of about 200-220 nanometers, its photon energy is relatively higher, and it may have a better decomposition effect on some difficult-to-remove organic pollutants. Ultraviolet light in this wavelength range can break the chemical bonds in organic molecules and decompose large organic pollutants into small molecules, making them easier to remove in subsequent cleaning. The wavelength between 250 and 280 nanometers is more effective in sterilization and disinfection, because the ultraviolet light in this range matches the nucleic acid absorption spectrum of microorganisms more closely, and can more effectively destroy the genetic material of microorganisms. For some viruses that are sensitive to ultraviolet light, such as influenza virus, ultraviolet light with a wavelength of 253.7 nanometers can inactivate them in a shorter period of time.
3. The correlation between wavelength selection and cleaner design
The design of Ultrasonic U-V Cleaner is closely related to the wavelength of ultraviolet light used. If the cleaner is mainly used for sterilization and disinfection, the design of the emission source such as the ultraviolet lamp inside it will focus on emitting ultraviolet light around 253.7 nanometers. For example, the material of the lamp, the internal filling gas, and the electrode design will be optimized to ensure the stable output of this wavelength. In terms of optical design, the shape and material of the reflector will be carefully designed to maximize the reflection of ultraviolet light of this wavelength so that it is evenly distributed in the cleaning area. If the cleaner needs to take into account the decomposition of organic pollutants and the sterilization and disinfection functions, a composite ultraviolet technology that can emit multiple specific wavelengths may be used, which requires more complex lamp design and control systems to ensure that ultraviolet rays of different wavelengths are emitted as required.
4. Wavelength adjustment and limitation in practical applications
In practical applications, the wavelength of Ultrasonic U-V Cleaner may also be adjusted to a certain extent according to the specific usage scenario, but this adjustment is limited by many factors. On the one hand, due to the limitations of existing ultraviolet generation technology, the generation of ultraviolet rays of a specific wavelength requires specific equipment and materials, and the cost and technical complexity may limit the adjustment range of the wavelength. On the other hand, from the perspective of the balance between safety and effectiveness, for example, in some environments where there may be exposure risks to the human body, although the cleaning effect can be improved by changing the wavelength, the degree of harm to the human body by different wavelengths must also be considered. Ultraviolet rays of 200-300 nanometers are harmful to human skin and eyes to a certain extent, so when adjusting the wavelength, it is necessary to ensure that the cleaner will not leak excessive ultraviolet rays under normal use to ensure the safety of the user.
