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Kin UVC-ljocht de firussen en baktearjes deadzje?

Time: 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.

Folgjende sille wy yn detail útlizze what UVC lights are, how they work, their precautions for use and some commercial applications om jo te helpen in dúdlik begryp te krijen.


uvc light sterilization


Wha is UVC light?


Lykas wy allegear witte, is sinneljocht in mingsel fan ljochte enerzjy op ferskate golflengten.


De golflengten fariearje fan 380 nanometers (nm) oant 780 nanometer (nm) wurde sichtber ljocht neamd, wylst dat bûten it berik fan 'e golflingte ûnsichtber ljocht hjit.

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 to 400 nm

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

  • UV-B: 280nm to 320nm

It kin hûdsykten behannelje. Mar te folle eksposysje sil sinnebrân en sels hûdkanker feroarsaakje. En mar minder dan 2% UVB kin de ierde berikke.

  • UV-C: 200nm to 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

Hoe koarter de golflengte, hoe sterker de enerzjy, mar hoe swakker de penetratie, hoe rapper it ferdwinen.


Function of UVC light

Ferlykbere kennis: Hokker UV-ljocht is it bêste?

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.

En de wurdearring fan 'e merk sels ferhege fan 140,000,000 US dollar nei in skatte 500,000,000 US dollars.

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.


As de UV-dosis net genôch is, sille guon firussen allinich aktiviteit tydlik ferlieze, en reparearje dan har eigen struktuer stadichoan.


  • 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.

Dit is de reden dat wy in drager moatte brûke dy't fergelykber is mei ultraviolette desinfeksjelampen om desinfeksje te berikken.


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.

Geloof dus net maklik dat it sizzen fan guon bedriuwen "wy kinne de firussen en baktearjes deadzje", soms is it allinich de marketingstaal.

Wy moatte beseffe dat allinich de effisjinsje, tiid en kosten de wichtige faktoaren binne yn ús kar foar UV-lampen.


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) Tradisjoneel ultraviolette desinfeksjelampen binne grut (op syn minst 40cm hichte of heger), leech effisjinsje. 1W LED-ljochtboarne kin yn prinsipe allinich 1 kante meter romte dekke.


(2) De ljochtboarne fan 'e measte ultraviolette desinfeksjelampen befettet kwik, dy't min is foar it miljeu en de sûnens as se frijlitten wurde.

(3) De measte lampen foar ultraviolet desinfeksje binne breedspektrumlampen ynklusyf UVC, UVA, en UVB, dy't wierskynlik ozon produsearje, wat liedt ta symptomen lykas wurgens, hoest, tichte boarst, misselijkheid, en ûnthâldferlies.


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.


Mei dizze grutte kin it tapasse yn in protte draachbere apparatuer mei desinfeksjefunksjes:

(1) Undergrûn


Besmette oerflakken lykas sikehûskeamers en -apparatuer, wenkeamer, lofthaven, en hast alle iepenbiere plakken as partikuliere items.


(2) Wetter


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.

Wy kinne UVC-oplossingen brûke yn it wettersuveringsysteem as it húske-systeem.


(3) Lucht


Luchtreinigers ferwiderje 99.97% fan partikulieren yn 'e loft, de filters ferwiderje lykwols gjin lytse pathogene mikro-organismen, lykas gryp.

Wy kinne UVC-oplossingen brûke yn it loftsuiweringsysteem as it kommersjele kanaal foar airconditioning.


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.


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