In 1904, Dr. Heraeus in Germany invented the world's first UV lamp, which made UV sterilization more widely used in more and more fields. So far, ultraviolet lamps have been invincible on the road of sterilization, and various types of ultraviolet sterilization equipment have become popular and entered the homes of ordinary people. Today, let’s talk about ultraviolet rays.
1. Take you to understand UV
According to the definition of International Electrotechnical Vocabulary (IEV)-Part 845, ultraviolet radiation (UV) is light radiation with a wavelength shorter than visible light, and ultraviolet radiation in the wavelength range of 100 to 400 nanometers (nm) Usually divided into three categories:
UV-A (wavelength 315～400nm)
UV-B (wavelength 280～315nm)
UV-C (wavelength 100～280nm)
In natural sunlight, UV-A accounts for about 98.1%, UV-B accounts for about 1.1%, and UV-C is almost absent due to being absorbed by the ozone layer.
UV-A has a strong penetrating power and can pass through the ozone layer and clouds to reach the surface of the earth. It exists in all seasons of the year regardless of whether it is cloudy or sunny. It stimulates the skin to produce free radicals, degrades collagen and elastin in the skin, and causes The skin has melanin pigmentation, and the accumulation of time will cause the skin to become loose and dark.
UV-B has a medium penetration power and is particularly strong in summer and afternoon, causing skin redness and sunburn in a short period of time. Reasonable irradiation can promote mineral metabolism and the formation of vitamin D in the body, and promote bone development, but long-term or excessive irradiation can cause skin redness and peeling. Most sunscreens on the market are used to protect against UV-B ultraviolet rays.
UV-C has the weakest penetrating power. UV-C in sunlight is absorbed by the ozone layer before reaching the ground.
2. UV products in life
"Blessing lies in the blessings, and the blessing lies in the misfortunes." Although the ultraviolet rays in the sun seem to do more harm than good, but industrious and intelligent human beings can always seek advantages and avoid disadvantages and use them for my use. There are many cases of using ultraviolet characteristics to make artificial light sources to benefit mankind. The main applications are:
The traditional ultraviolet light source is a mercury arc lamp (commonly known as mercury lamp or mercury lamp). The lamp is encapsulated with mercury, and a transparent quartz tube is made of quartz glass or other glass with high ultraviolet transmittance. When the filament is heated, the mercury vapor in the tube is excited Transition to an excited state, and emit ultraviolet light when returning from the excited state to the ground state. Depending on the pressure of mercury vapor in the tube, the emitted ultraviolet light has a different spectrum.
According to the "Minamata Convention on Mercury Prevention and Control", the contracting parties including China will ban the production, export and import of mercury-containing products from 2020. At the same time, driven by the environmental protection concept, Shenzhen LightS Technology Co., Ltd. successfully developed 222nm uv light. And with the maturity of far uvc light technology and the decrease in cost, the penetration rate of far uvc light, which is safer, more efficient and low energy consumption, is increasing, and it will become the best choice to replace mercury lamps.
According to the "2019 Deep Ultraviolet LED Application Market Report-Sterilization, Purification and Water Treatment Market" released by LEDinside of TrendForce, the global UV LED market reached 299 million U.S. dollars in 2018, and it is expected that the market size will increase by 2023. Reached US$991 million, with a compound growth rate of 27% in 2018-2023. Looking forward to the application market demand, in addition to the stable growth of the curing market, surface/air sterilization, static water sterilization, and flowing water sterilization will be the main growth drivers in the future.
3. How to choose UV products
In the current market, household ultraviolet sterilization products emerge in endlessly, and most of them use UV LED. Its pure physical disinfection, no chemical residue, small size, energy saving, high efficiency, and long service life are highly sought after by the public. The following LightS Technology Co., Ltd. helps you to choose suitable UV sterilization products:
1) Choose UV sterilization products according to your own needs
For example, if there are elderly, children or pets in the home, you can often use 222nm ultraviolet germicidal lamps to inhibit the growth of bacteria and viruses; poor outdoor air quality leads to poor indoor ventilation conditions, and you can often use ultraviolet germicidal lamps to remove mites and create health The living environment; and like household aquariums generally use UV over-flow water purifiers;
2) Consider vendors and purchase channels
Consider manufacturers in terms of product quality, price, service, corporate qualifications and reputation, and choose reliable manufacturers and purchase channels;
3) Pay attention to product quality certificates
Check whether the product has a clear and complete nameplate, instruction manual, certificate of conformity, and a test report issued by a qualified third-party testing agency;
4) Pay attention to ozone concentration
Through the manual or directly to the manufacturer to understand whether the product will produce ozone and its concentration when working. Ozone is a double-edged sword like ultraviolet light. Its strong oxidizing properties can play a role in sterilization; however, if the ozone concentration is too high, it will stimulate the human respiratory system, so it is necessary to strictly control the ozone concentration to be less than 0.1ppm, and ventilate after disinfection is completed It takes 30 minutes to enter.
There are thousands of products, safety first. Considering the potential harm of ultraviolet rays to the human body, when using such products containing ultraviolet radiation, especially the more popular handheld ultraviolet germicidal lamps in the near future, you must pay attention to:
1) Read the product manual carefully, and use the product according to the requirements of the manual only after understanding it correctly;
2) Do not irradiate people directly during the use of the product, especially do not look directly at ultraviolet light with the naked eye;
3) Before using the product, check whether the UV protective glasses are in good condition and wear them correctly;
4) Avoid children's use, make good use of child locks and other functions to prevent product misuse;
5) For surface sterilization products, ensure a reasonable radiation distance during use. If the distance is too large, the sterilization effect will not be achieved. Please check the instructions for details.