UVC｜The darling of the UV LED application market

Before understanding UVC, let me introduce what UV is.

UV, the English name Ultraviolet, refers to ultraviolet rays, which have different wavelengths, and different wavelengths can be subdivided into UVA, UVB, UVC, UVD, etc.

UVA: The wavelength is between 320-400nm, which can penetrate the clouds and is the culprit that causes us to tan.

UVB: The wavelength is between 280-320nm, which will be absorbed by the ozone layer and cause sunburn on the skin.

UVD: The wavelength is between 100-200nm, also known as vacuum ultraviolet.

The protagonist UVC introduced today is the C band of ultraviolet rays, with a wavelength between 200-280nm, also known as short-wave sterilization ultraviolet rays. It has the weakest penetrating ability and cannot penetrate most glass and plastics. The short-wavelength contained in sunlight Ultraviolet rays are almost completely absorbed by the ozone layer.

Among all ultraviolet rays, short-wave ultraviolet rays such as UVC have the strongest sterilization effect, so they are widely used in sterilization technology.

Sterilization principle

Ultraviolet rays mainly kill microorganisms through radiation damage to microorganisms (bacteria, viruses, spores and other pathogens) and the function of destroying nucleic acids, thereby achieving the purpose of disinfection. Among them, ultraviolet rays with a wavelength of 265nm have the best disinfection effect.

I believe that some people’s impression of disinfection lamps is still in the “mercury lamp” era. UVC LED has emerged in the past two years and has become the darling of the application market, and the application scenarios have begun to gradually develop in a diversified direction. As a new, efficient and harmless sterilization method, UVC LED is different from traditional sterilization methods.

The difference between UVC LED and traditional mercury lamp

1. Traditional ultraviolet lamps have always used mercury (mercury) lamps to emit light. Mercury is a very dangerous substance and is a carcinogen. It is harmful to the human body. After the "Minamata Convention", mercury lamps have been completely banned. , But UVC LED (ultraviolet light-emitting diode) is a green technology that achieves sterilization effect through ultraviolet lamps. It is a high-tech semiconductor light source that emits ultraviolet rays.

2. UVC LED has the advantages of more efficient, more stable, low power consumption, long service life and environmental protection.

3. The UVC LED lamp has a sterilization efficiency of up to 99.9%. It can kill almost all bacteria and viruses with high efficiency, and no chemical pollutants are generated. The entire sterilization process does not need to add any chemical agents, which is truly environmentally friendly.

4. There is no drug resistance: ultraviolet rays directly destroy the DNA, RNA, protein, etc. in the bacterial virus cell, causing the cell to die directly and unable to reproduce and replicate, and there is no drug resistance. The sterilization of other chemical agents will cause the bacteria and viruses to become resistant, and the sterilization effect of the chemical agent will be invalid.

Compared with traditional mercury lamps, UVC LED has significant advantages and high reliability

No need to warm up, instantly reach 100% power UV output

Able to sterilize efficiently

No harmful substances

It will not produce ozone harmful to the human body

long life

And is not affected by the number of switches

Direct electro-optical conversion

Low energy conversion loss

Low power consumption during standby

How to irradiate and disinfect the best

When using, pay attention to the influence of the use environment on the sterilization effect. Under normal circumstances, the output intensity of ultraviolet rays is the highest when the temperature is between 27°C and 40°C, and the sterilization effect is the best. In addition, ensure that the use environment is clean and dry. A large amount of moisture and dust in the environment will interfere and weaken the ultraviolet rays. Function to reduce the actual UV intensity. When using at home, try to seal the doors and windows, close the curtains, and turn off the lights to ensure that the room is in a darker condition, which is more conducive to the sterilization effect of ultraviolet rays. For places that are prone to bacteria and other microorganisms, such as bed covers, the bed can be unfolded , Increase the contact area, which is more conducive to ultraviolet disinfection.

The UV germicidal lamp should ensure sufficient UV exposure time when in use. Studies have shown that after 5 minutes of irradiation, it is an effective sterilization and disinfection time. When it reaches 30 minutes, the daily disinfection effect can be achieved. When the irradiation time reaches 60 minutes, it can kill most of the bacteria and other microorganisms in the air.