Kaalaman sa UVC

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Maaari bang patayin ng ilaw ng UVC ang mga virus at bakterya?

Oras: 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.

Susunod, ipapaliwanag namin nang detalyado what UVC lights are, how they work, their precautions for use and some commercial applications upang matulungan kang makakuha ng isang malinaw na pag-unawa.


uvc light sterilization


Wha is UVC light?


Tulad ng alam nating lahat, ang Sunlight ay isang halo ng light energy sa iba't ibang mga haba ng haba.


Ang mga wavelength ay mula sa 380 nanometer (nm) hanggang 780 nanometer (nm) ay tinatawag na nakikita na ilaw, samantalang ang mga lampas sa saklaw ng haba ng daluyong ay tinatawag na di-nakikita na ilaw.

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 hanggang 400 nm

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

  • UV-B: 280nm hanggang 320nm

Maaari itong gamutin ang mga sakit sa balat. Ngunit ang labis na pagkakalantad ay magiging sanhi ng sunog ng araw at maging sa kanser sa balat. At mas mababa lamang sa 2% ng UVB ang maaaring maabot ang mundo.

  • UV-C: 200nm hanggang 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

Ang mas maikli ang haba ng daluyong, mas malakas ang enerhiya, ngunit mas mahina ang pagtagos, mas mabilis ang paglaho.


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.

At ang pagpapahalaga sa merkado kahit na tumaas mula sa 140,000,000 US dolyar sa tinatayang 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.


Kung ang dosis ng UV ay hindi sapat, ang ilang mga virus ay pansamantalang mawawalan ng aktibidad, at pagkatapos ay dahan-dahang ayusin ang kanilang sariling istraktura.


  • 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.

Ito ang dahilan kung bakit kailangan nating gumamit ng isang carrier na katulad ng mga ultraviolet disinfection lamp upang makamit ang pagdidisimpekta.


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.

Kaya huwag madaling paniwalaan ang sinasabi ng ilang kumpanya na "maaari nating patayin ang mga virus at bakterya", kung minsan ito ay wika lamang sa marketing.

Dapat nating mapagtanto na ang kahusayan, oras at gastos ang pangunahing mga kadahilanan sa pagpili ng mga lampara sa UV.


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) Ang mga tradisyunal na ultraviolet disinfection lamp ay malaki (hindi bababa sa 40cm taas o mas mataas), mababang kahusayan. 1W LED light mapagkukunan ay maaaring talaga masakop ang 1 square meter ng puwang.


(2) Ang ilaw na mapagkukunan ng karamihan sa mga ultraviolet disinfection lamp ay naglalaman ng mercury, na masama sa kapaligiran at kalusugan kung pinakawalan.

(3) Karamihan sa mga lampara sa pagdidisimpekta ng ultraviolet ay mga lampara na may malawak na spectrum kasama ang UVC, UVA, at UVB, na malamang na makagawa ng osono, na humahantong sa mga sintomas tulad ng pagkapagod, ubo, higpit ng dibdib, pagduduwal, at pagkawala ng memorya.


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.


Sa laki na ito, maaari itong mag-aplay sa maraming mga portable na kagamitan na may mga pagpapaandar ng pagdidisimpekta:

(1) Ibabaw


Mga nasusunog na ibabaw tulad ng mga silid at kagamitan sa ospital, mga sala, paliparan, at halos lahat ng mga pampublikong lugar o pribadong mga item.


(2) Tubig


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.

Maaari kaming gumamit ng mga solusyon sa UVC sa sistema ng paglilinis ng tubig o sistema ng banyo.


(3) Hangin


Ang mga purifier ng air ay nagtanggal ng 99.97% ng mga partikulo na nasa eruplano, gayunpaman, ang mga filter ay hindi tinanggal ang maliit na pathogenic micro-organismo, tulad ng trangkaso.

Maaari kaming gumamit ng mga solusyon sa UVC sa sistema ng paglilinis ng hangin o ang sistema ng duct ng komersyal na air conditioning.


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.


Kaugnay na Artikulo: Ang panghuli gabay ng mamimili sa iyong pagbili ng UV Lamps


Mahusay na solusyon sa UVC LED para sa Minisplits


Mahusay na solusyon sa UVC para sa HVAC Units