Kev Paub Txog UVC

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UVC lub teeb tua tau cov kab mob thiab cov kab mob?

Sij hawm: 2020-04-21

For decades, scientists have been devoted to the research of UVC light for disinfection, especially when the UVC market is huge and the human pursuit of health is more important than ever before.


More and more reports indicate that UVC light products can kill viruses and bacteria higher than a 99.9% rate, which directly leads to the crazy purchase of UVC products.


But in fact, few people know exactly what UVC light is and whether UVC light is useful for sterilization.

Next, we'll explain in detail what UVC lights are, how they work, their precautions for use and some commercial applications kom pab koj kom nkag siab zoo.


uvc light sterilization


Wha is UVC light?


Raws li peb txhua tus paub, Hnub ci yog qhov sib xyaw ntawm lub zog ntawm lub teeb yoj sib txawv.


Lub wavelengths thaj tsam li ntawm 380 nanometers (nm) txog 780 nanometers (nm) yog hu ua lub teeb pom kev, thaum uas dhau ntawm qhov ntau ntawm yoj yoj raug hu ua qhov pom tsis pom.

Ultraviolet light is a type of invisible light ranging from 10 nm to 400 nm. And the function of UV light depends on the range of wavelength.

  • UV-A: 320nm txog 400 nm

It makes up the majority of UV light reaching the Earth. And it can damage our skin.

  • UV-B: 280nm rau 320nm

Nws tuaj yeem kho kab mob ntawm daim tawv nqaij. Tab sis ntau dhau kis yuav ua rau tshav kub thiab ua daim tawv nqaij tawv. Thiab tsuas yog tsawg dua 2% ntawm UVB tuaj yeem mus txog hauv lub ntiaj teb.

  • UV-C: 200nm txog 280nm

It is particularly good at sterilizing. But its penetration ability is very weak. Before reaching the ground, all UVC light will be absorbed by ozone in the atmosphere. That means, standing under the sun is useless for sterilization.

  • In summary: UV light Rule

Qhov luv luv ntawm qhov ntev, qhov muaj zog ntawm lub zog, tab sis qis dua kev nkag mus, kev ploj sai dua.


Function of UVC light

Related Knowledge: Which UV light is the best?

Because UVC light can be used for sterilization, coupled with the epidemic environment, the market demand for UVC products can be described as Crazy now.

Thiab kev lag luam tus nqi tseem nce ntxiv ntawm 140,000,000 Asmeskas las txog 500,000,000 Asmeskas las.

The big question right now may be how does UVC light work and can it kill viruses & bacteria?


How does UVC light work?


Before the deep study of UVC light, I thought all sunlights have the sterilization effect. Bacteria and viruses will be killed by "sunburn" or heat.

But that's not the truth.


  • Sterilization Principle of UVC light


In fact, UVC light will destroy the DNA or RNA of the bacteria & viruses, without the use of chemicals, making them inactive and unable to reproduce.

Since the lifespan of single bacteria & viruses is very short, once they lose the reproduce ability, it means death. So the purpose of sterilization has been achieved.


In scientific research, it has been found that UVC light can use very little time to finish the disinfection process and make most microbes reduction up to 99.99%.


Research of UVC light

Based on this information, UVC light is believed to be quiet effective at killing viruses and bacteria.


However, the vitality of different viruses and bacteria are different. Some bacteria&viruses may be injured once they are exposed to UVC light, while others are not.


Yog tias qhov kev ntsuas UV tsis txaus, qee cov kab mob tsuas yog ua ploj mus ib ntus, thiab tom qab ntawd maj mam kho lawv tus kheej.


  • Special requirements of UVC lights

At present, there are no specific figures to show how much UV dose flu viruses needs to be killed. Maybe 1,085 mJ / cm2 or 3,640 mJ / cm2 . Anyway, a huge number.

You may be wondering if we stand under the sunlight containing UVC light, can we be disinfected by it?

Unfortunately, the answer is no. Although the sterilization ability of UVC light is extremely strong, the penetration ability to objects (including air) is extremely weak. Before reaching the ground, all UVC light will be filtered out by ozone in the atmosphere.

Vim li no peb thiaj yuav tsum siv cov pa roj cua uas zoo ib yam li cov teeb tsa hluav taws xob tua kab mob ua kom pom kev ua haujlwm.


Please pay attention to the fact that most UV lamps on the market are only designed to meet the common standard, that is, 40mJ / cm2 UV dose required for a 99.99% inactivation rate.


Study result of UVC light

Further considering the decay of UVC light in the air, those lamps make no sense for disinfection.

Yog li tsis txhob ntseeg yooj yim txog qee lub tuam txhab hais tias "peb tuaj yeem tua cov kab mob & kab mob", qee zaum nws tsuas yog cov lus lag luam nkaus xwb.

Peb yuav tsum paub tias tsuas yog qhov ua tau zoo, lub sijhawm thiab tus nqi yog qhov tseem ceeb ntawm peb txoj kev xaiv ntawm UV teeb.


Are ultraviolet lamps containing uvc light safe?


Although UVC light can indeed kill viruses and bacteria, there are various problems with household ultraviolet disinfection lamps on the market:

(1) Tsoos hluav taws xob ultraviolet kab teeb ci yog qhov loj (yam tsawg kawg 40cm qhov siab lossis siab dua), ua haujlwm tsawg. 1W LED teeb ci tau tuaj yeem npog tsuas yog 1 square meter ntawm qhov chaw.


(2) Lub teeb ci ntawm cov teeb ci tua kab mob ultraviolet feem ntau muaj cov mercury, uas yog qhov tsis zoo rau ib puag ncig thiab kev noj qab haus huv yog tias tso tawm.

(3) Feem ntau cov teeb meem siv hluav taws xob muaj teeb pom kev zoo yog lub teeb pom kev dav dav suav nrog UVC, UVA, thiab UVB, uas feem ntau yuav tsim tau ozone, ua rau cov tsos mob xws li qaug zog, hnoos, ceev hauv siab, xeev siab thiab nco ploj.


Applications of UVC light

From this perspective, the main application scenarios of UVC light should be industrial types to maintain safe.


Applications of uvc light


To make better use of UVC light, we have developed a new lighting technology, which can make the UVC energy in a very small size with 3.5mm x 3.5mm without mercury.


Nrog rau qhov loj me no, nws tuaj yeem thov rau hauv ntau cov khoom siv thauj nrog cov tsis ua haujlwm:

(1) Nto


Cov chaw tsis huv xws li chav pw hauv tsev kho mob thiab khoom siv, chav nyob, tshav dav hlau, thiab yuav luag txhua qhov chaw pej xeem lossis khoom siv ntiag tug.


(2) Dej


Mercury-free UVC light is a clean and safe water disinfectant, UVC LED based solutions tackle these pathogens without impacting the water's smell, taste or mineral contents.

Peb tuaj yeem siv cov tshuaj UVC nyob rau hauv kev siv dej lim lossis chav tso quav.


(3) Huab cua


Huab cua lim cov huab cua tshem tawm 99.97% ntawm cov pa paug, txawm li cas los xij, cov lim tsis tshem cov kab mob me me ntawm cov kab mob me me, xws li khaub thuas.

Peb tuaj yeem siv cov tshuaj UVC nyob rau hauv kev lim dej hauv huab cua lossis kev lag luam coj mus muag cua txias.


How to use UVC light

All in all, UVC light can indeed kill viruses and bacterial if we choose the right system for specific applications.


Lwm Yam Tshooj: Qhov kawg ntawm tus neeg yuav khoom ntawm koj li UV teeb yuav


Npaum UVC LED daws rau Minisplits


Kev siv UVC kom zoo rau HVAC Chav Nyob