UV-C yog dab tsi?
Ib hom hluav taws xob uas poob rau hauv lub spectrum yog UV (ultraviolet) lub teeb, uas ntsuas hauv nanometers (nm). UV teeb yog pom tsis tau rau tib neeg pom, txawm tias pom lub teeb.
Muaj peb hom hluav taws xob ultraviolet: UV-A, UV-B, thiab UV-C.
Lub wavelength ntawm UV-A yog qhov ntev tshaj plaws, ncua los ntawm315-400 nm.
Qhov nruab nrab wavelength ntawm UV-B yog nyob nruab nrab ntawm 280 thiab 315 nm.
Lub wavelength ntawm UV-C yog qhov luv tshaj plaws, ncua ntawm 200 txog 280 nm.
Qhov kev puas tsuaj thiab nkag mus tau txo nrog txo wavelength. Ntawm qhov tod tes, kev nkag mus ntau dua thiab muaj kev phom sij tsawg dua tshwm sim nrog cov wavelength ntev dua.
Cov kab mob tuaj yeem raug tua los ntawm UV-C, uas muaj kev cuam tshuam cov kab mob ntawm peb hom UV rays. Thaum UV hluav taws xob absorbed los ntawm microorganisms ' DNA, nws txwv tsis pub cov microbes los ntawm kev tsim thiab loj hlob. UV-C lub teeb feem ntau yog siv los tua kab mob thiab kab mob.
Kev ua kom tsis muaj menyuam yog qhov sib txawv ntawm UVC, UVA, thiab UVB. Lub peev xwm ntawm UVC los ua kom tsis muaj menyuam yog nws cov yam ntxwv zoo tshaj plaws.
Dab tsi yogUV-C LED?
Lub teeb-emitting diodes (LEDs) uas tsim photons nyob rau hauv cheeb tsam UV-C ntawm wavelengths ua los ntawm ntau txheej ntawm substrate khoom yog hu ua UV-C LEDs. Qhov zoo tshaj plaws wavelength ntau rau sterilization yog nruab nrab ntawm 260 thiab 270 nm. Qhov kev ua kom tsis muaj menyuam diminishes exponentially nrog nce wavelength.
UV-C LED Vs Traditional Mercury Vapor Teeb
Txawm hais tias UV-C LEDs muaj ntau yam txiaj ntsig tshaj cov pa roj mercury vapor teeb, lawv tseem ua haujlwm tib yam.
Thaum UV-C LEDs zoo dua rau ib puag ncig thiab muaj lub neej ntev, lawv muaj tib lub zog kom tsis muaj menyuam.
Ntau cov khoom siv UV-C LED tau tsim los ntawm kev tsim kho tshiab thiab thev naus laus zis los ua cov kab mob thiab cov kab mob tsis ua haujlwm.
Cia peb pib tshuaj xyuas lub ntsiab lus los tshawb pom cov txiaj ntsig ntawm UV-C LEDs dhau cov teeb pom kev zoo mercury txhawm rau pab tib neeg kom nkag siab qhov sib txawv ntawm ob hom teeb pom kev zoo:
UVC LED Nqe Trends
Kev kwv yees tus nqi qauv ntawm UVC nyob rau kaum xyoo tom ntej
1. Tus nqi ntawm UVC LEDs yuav nce ntawm 2020 thiab 2030 raws li lawv cov thev naus laus zis nce qib thiab lawv tau siv los ntawm tib neeg rau lub hom phiaj uas tsis yog kev ua kom tsis muaj menyuam, xws li tshuaj tua kab mob, dej, thiab huab cua.
2. Yuav ua li cas UVC hloov dua siab tshiab yuav tsum hloov thaum lub sij hawm kaum xyoo tom ntej
Lub hauv paus yog vim li cas UVC LEDs tseem tsis tuaj yeem hloov kho kom tsis muaj teeb meem ultraviolet mercury teeb rau kev siv kho mob yog tias lawv lub teeb tseem tsis txaus.
3. Ntau lub LEDs lossis ntau lub sijhawm yuav xav tau los muab cov nyhuv sterilizing tib yam li cov teeb mercury.
4. Lub sijhawm no, siv UV LEDs rau kev tua kab mob tsis raug nqi rau cov chaw kho mob uas muaj kev siv ntau thiab ntau yam kev ua kom tsis muaj menyuam.
5. Kev txhim kho ntawm UVC LEDs yuav txav mus rau lub zog siab hauv 10 xyoo tom ntej, uas ua rau muaj zog ua kom muaj zog ntxiv.
Qhov zoo ntawm UVC LED
(1) UV sterilization yog ceev thiab siv tau. Raws li pom nyob rau hauv Table 4, cov kab mob, kab mob, pwm spores, algae, thiab ntses kab mob tej zaum yuav tag nrho cov raug tshem tawm nyob rau hauv ib tug ob peb vib nas this ntawm ib tug UV siv ntawm 30,000 μW/cm2. Tsis tas li ntawd, qee qhov kev tshawb fawb tau sau tseg tias thaum raug lub teeb ci LED ultraviolet ntawm qhov chaw ntsug ntawm 2-5 cm rau 5 feeb, tus nqi tua ntawm Staphylococcus aureus ntawm tus kab mob cab yog 100%; kev tua tus nqi ntawm E. coli kuj mus txog 100%; thiab JL Clancy et al. xav tias qhov inactivation tus nqi ntawm Cryptosporidium tuaj yeem tshaj 99.9% ntawm UV hluav taws xob koob tshuaj ntawm 30J / m2.
(2) Yuav luag tag nrho cov kab mob thiab cov kab mob tau ua kom tsis muaj zog los ntawm hluav taws xob ultraviolet. Escherichia coli, Aspergillus niger, kab mob khaub thuas, thiab kab mob siab B yog nyob rau ntawm kaum cov kab mob thiab cov kab mob uas tau teev tseg hauv Table 4. Nws pom tseeb tias UV hluav taws xob ua haujlwm tsis zoo rau cov kab mob thiab cov kab mob hauv daim ntawv teev npe.
(3) UV sterilization txheej txheem ua haujlwm tsis tu ncua. Sterilization thiab detoxification yog cov txheej txheem ntawm lub cev uas yuav tsis cuam tshuam rau tib neeg kev noj qab haus huv lossis tsim kom muaj kev phom sij ntau dua.
