75% alcohol and chlorine-containing disinfectants can effectively kill the new coronavirus.

With all kinds of alcohol and disinfectants out of stock, ultraviolet disinfection equipment has come into everyone's eyes. Today, we will learn about the basic knowledge of ultraviolet rays to kill coronavirus, so that everyone can master the application method of ultraviolet equipment.

How UV light kills viruses

Ultraviolet light is named because it is located outside the violet region of the spectrum. It is also called "ultraviolet light" and belongs to an invisible light.

In fact, even without the arrival of the new coronavirus, ultraviolet light has always been a front-line force for disinfection and sterilization. It has outstanding performance in the prevention and control of epidemics such as SARS and avian influenza, and is trustworthy.

There are four spectrums of ultraviolet rays, and there is a "short-wave ultraviolet" with a wavelength between 200 and 280 nm. Its wavelength is consistent with the strongest peak of nucleic acid absorption of bacteria and viruses, so the sterilization and disinfection effect is the most significant. If bacteria or viruses are irradiated by ultraviolet rays in this range, their DNA or RNA will be easily broken down, unable to replicate, and thus unable to pose a threat to humans. The "new coronavirus" we encounter today is an RNA virus, so irradiation with ultraviolet light has a positive effect on killing it.

Factors Affecting the Effect of Ultraviolet Disinfection

Before introducing the antivirus of ultraviolet equipment, we also need to understand a concept, that is, the radiation intensity of ultraviolet rays.

The definition of ultraviolet radiation intensity in the book refers to the ultraviolet radiation intensity per unit area measured at a specific distance from the midline of the surface of the ultraviolet germicidal lamp, in μW/cm².

In short, for our daily use of ultraviolet disinfection equipment, especially ultraviolet lamps, under the premise of the same light source, distance is an important factor in determining the antivirus effect: the closer the object is to the lamp, the higher its intensity, and the distance The further away, the worse the effect.

Precautions for the use of UV equipment

If ultraviolet rays are irradiated on the human body for a long time, it will cause skin damage, and even cause hidden dangers such as melanoma and electro-optic ophthalmia. Therefore, when using ultraviolet equipment for disinfection, in addition to paying attention to the space, distance and time of disinfection, we should also beware of the harm of ultraviolet rays to the human body.

The latest UV-C ultraviolet air disinfection system on the market at present, the installation height and lamp structure are carefully designed, which can disinfect the flowing air in the space even in the case of personnel activities. The sterilized air will be transported back to the low-level space by means of mechanical ventilation and/or natural convection, which perfectly solves the problem of worrying about UV damage to the human body.

Since UV-C ultraviolet radiation can damage the skin and eyes of humans and animals, UV-C ultraviolet disinfection products must be installed by professionals in accordance with strict safety rules and regulations to avoid unnecessary harm to humans and animals.