What is deep ultraviolet sterilization technology? What are its advantages?

发布时间：2021-09-07 14:25 来源：萤光创新

With the functional advantages of safety, environmental protection, fineness, high efficiency and low consumption, deep UV LED beads have been recognized by shopping malls, and have seen clues in the fields of water purifiers, mother and baby products, air conditioners, refrigerators and other high-end consumer goods.

So what are the advantages of deep UV LED beads? How does ultraviolet light kill bacteria and viruses? Why is deep UV LED called sterilization artifact?

1、 Principle of ultraviolet sterilization

First, according to the wavelength, ultraviolet can be divided into UVA long wave ultraviolet (wavelength range 315 – 400 nm), UVB medium wave ultraviolet (wavelength range 280 – 315 nm), UVC short wave ultraviolet (wavelength range 200 – 280 nm) and VUV vacuum ultraviolet (wavelength range 10 – 200 nm). UVA long wave ultraviolet is often called near ultraviolet, and UVC short wave ultraviolet is often called deep ultraviolet.

Second, UV is a mutagen. In a specific wavelength range (mainly UVC) and high enough dose, UV can cause abnormal chemical bonds between adjacent pyrimidine molecules of DNA or RNA in microbial cells such as bacteria and viruses, hinder the replication of DNA or RNA, and cause microbial cell death. Deep ultraviolet LED can achieve the effect of sterilization and disinfection by emitting deep ultraviolet with UVC wavelength.

Third, during the SARS period, researchers from the China Center for Disease Control and Prevention found that using a UV exposure of more than 90uW/cm2 for 60 minutes, the SARS virus could be killed. New Coronavirus is similar to SARS virus and belongs to single strand positive strand RNA virus. Therefore, scientific and rational use of ultraviolet rays can effectively kill New Coronavirus.

2、 Advantages of LED

At present, there are two kinds of UV light sources for sterilization: traditional mercury lamp and deep UV LED. Compared with many shortcomings of traditional mercury lamps, deep UV LED has obvious policy and technical advantages.

Disadvantages of traditional mercury lamps:

(1) Bulky appearance, large size, large space, inconvenient installation and equipped with high-voltage power.

(2) The start-up time is long and the light needs to be warmed up. Generally, it takes 1-5 minutes to stabilize the output, which can not be turned on and used immediately.

(3) The glass tube is fragile, the frequent switch is easy to break, and the ballast is easy to be damaged,

(4) The service life is short, the actual effective life is about 1000 hours, and up to 90% of the service life is consumed in the frequent switching stage.

(5) It is highly toxic and contains mercury. After rupture, it will cause mercury leakage, pollute the environment and seriously endanger human health.

Compared with other sterilization methods, deep UV LED has obvious technical advantages:

(1) Instant on and use, microsecond response, sterilization and stable output at the moment of power on;

(2) Space saving, small volume, light weight and convenient installation;

(3) Maintenance free, frequent start-up has no impact on service life and low failure rate;

(4) Non toxic and harmless, no mercury and no heavy metals;

(5) Long service life, service life can reach more than 3000 hours of high-efficiency sterilization ability;

(6) No pungent smell, pure 270-285nm UVC ultraviolet, no ozone;

(7) It can be installed at the water outlet to realize terminal sterilization without secondary pollution;

In order to investigate the sterilization effect of deep UV LED sterilization module and mercury lamp tube over-current sterilization module, we have conducted a group of sterilization effect experiments with our deep UV LED over-current sterilization module by using a well-known international brand of lamp tube for a certain type of 6W mercury lamp sterilization module in the market.

Through the comparison of sterilization test results (as follows), it is not difficult to find:

Comparison of sterilization experiments between fluorescent f102 overflow water sterilization module and traditional mercury lamp sterilizer

The mercury lamp sterilizer has a long start-up time and generally takes 5 minutes to output stably. It can not be opened and used immediately, and the sterilization rate is far lower than that of LED.

Qingdao fluorescent Innovation Technology Co., Ltd. has built its own microbiology laboratory to provide free sterilization test support for customers' products, which not only saves costs for customers, but also provides rapid experimental support and shortens customers' verification cycle.

In order to completely solve the hidden danger of exceeding the standard of bacterial colonies in drinking water sterilization, fluorescence innovation technology has developed sterilization faucet and sterilization faucet. The sterilization function is cleverly contained in the faucet and nozzle of the water purifier (water dispenser), so as to achieve real end sterilization, and the inlet is after sterilization. The problem of secondary pollution has been really solved.

Qingdao fluorescent Innovation Technology Co., Ltd. has a professional postdoctoral team, focusing on the research of ultraviolet sterilization application. After years of deep cultivation in the ultraviolet industry, the company has obtained a number of national invention and utility model patents. At present, a number of sterilization module products have been put into the market. For more details, you can browse the company website www.qdyingguang.com, contact the company for WeChat's official account.