LED UV raj yog coj txoj hauv kev hauv kev txhim kho ntawmultraviolet (UV) lub teebtechnology, uas tau hloov ntau yam kev lag luam, nrog rau kev tsim khoom thiab kev kho mob. LED UV tubes muab kev nyab xeeb ib puag ncig, raug, thiab kev siv hluav taws xob zoo sib piv rau cov pa mercury -raws li UV teeb. Txawm li cas los xij, cov cuab yeej no ua haujlwm li cas? Nplooj ntawv no delves ntxiv rau hauv kev tshawb fawb, qhov chaw, thiab kev siv ntawm LED UV raj, muab cov lus piav qhia ntxaws txog lawv ua haujlwm li cas.
Paub txog Cov Ntsiab Cai ntawm UV Teeb thiab LED
UV Teeb yog dab tsi?
Nrog wavelengths ntawm 10 thiab 400 nanometers, lub teeb ultraviolet yog ib hom hluav taws xob hluav taws xob hluav taws xob uas ntev dua X-rays tab sis luv dua li pom lub teeb. Nws muab faib ua peb hom raws li wavelength:
UVA: Ntev-yoj UV, muaj txiaj ntsig rau tanning, kho, thiab qee qhov ua kom tsis muaj menyuam (315–400 nm).
UVB: Nruab nrab-yoj UV, uas txuas rau daim tawv nqaij kub hnyiab thiab muaj kev siv hluav taws xob tsawg (280–315 nm).
UVC (100–280 nm): luv-yoj UV uas ua haujlwm zoo heev rau kev tua kab mob thiab tua kab mob.
UV hluav taws xob yog qhov tseem ceeb rau cov txheej txheem xws li kho cov polymers, kom tsis muaj menyuam, thiab ntxuav cov dej vim tias nws muaj peev xwm cuam tshuam cov tshuaj tiv thaiv kab mob thiab pib cov tshuaj tiv thaiv photochemical.
Yuav ua li cas lub teeb yog tsim los ntawm LEDs
Cov khoom siv semiconductor hu ua lub teeb -emitting diodes (LEDs) tso lub teeb thaum muaj hluav taws xob ntws los ntawm lawv. Thaum electrons nyob rau hauv cov khoom siv semiconductor recombine nrog electron qhov, lub zog yog tso tawm nyob rau hauv daim ntawv ntawm photons, ib tug txheej txheem hu ua electroluminescence. Lub semiconductor lub zog bandgap, uas yog txiav txim los ntawm cov khoom ntawm nws cov khoom, txiav txim siab lub wavelength (xim) ntawm lub teeb uas tso tawm.
UV LEDs ntiav cov ntaub ntawv tshwj xeeb xws li aluminium gallium nitride (AlGaN) los tsim ultraviolet wavelengths, whereas ib txwm LEDs tsim lub teeb pom kev.
Kev Tshawb Fawb ntawm UV Tubes hauv LEDs
Ntau UV LEDs teeb tsa nyob rau hauv ib kab array nyob rau hauv ib lub raj cylindrical yog hu uaLED UV tubes. Peb lub tswv yim tseem ceeb qhia txog qhov lawv ua haujlwm li cas:
a. Bandgap engineering thiab semiconductor cov ntaub ntawv
Cov khoom siv semiconductor nyob rau hauv LED yuav tsum muaj lub zog bandgap uas phim UV wavelengths thiaj li yuav emit UV teeb. Piv txwv li:
Siv AlGaN lossis indium gallium nitride (InGaN) rau UVA LEDs (365–405 nm).
UVC LEDs (250–280 nm): Xav tau qhov tseeb doping ntawm siab -purity aluminium nitride (AlN) lossis AlGaN.
Lub semiconductor lub elemental piv yuav raug hloov los tswj lub bandgap. Luv luv UV wavelengths yog ua tau, piv txwv li, los ntawm kev nce lub bandgap hauv AlGaN raws li tus nqi ntawm txhuas nce.
b. UV LED electroluminescence
Thaum LED tau txais qhov voltage:
Lub p- hom semiconductor txheej tau txais electrons los ntawm n- hom semiconductor txheej.
Electrons thiab qhov recombine ntawm txoj kev sib tshuam, tseem hu ua active cheeb tsam.
Photons yog lub zog tso tawm los ntawm qhov kev sib xyaw ua ke no.
Cov photons uas tawm ntawm UV LEDs muaj ultraviolet wavelengths. Txawm li cas los xij, kev tsim hluav taws xob thiab cov khoom siv tsis zoo ua rau nws nyuaj rau kev ua tiav UV emissions zoo.
c. Kev hloov pauv ntawm Phosphor (Rau UVA Daim Ntawv Thov)
Phosphor coatings yog siv los ntawm qee cov UV LEDs los hloov cov luv wavelengths (xws li UVC) mus rau UVA wavelengths ntev dua. Qhov no yog ib txwm nyob rau hauv curing daim ntaub ntawv qhov twg photoinitiators nyob rau hauv inks los yog resins yuav tsum tau qhib los ntawm tshwj xeeb wavelengths.
Cov ntsiab lus tseem ceeb ntawm LED UV Tubes
Cov yam ntxwv ntawm LED UV raj muaj xws li: a. UV LED Chips
Nyob rau hauv ib lub substrate, ntau semiconductor chips yog positioned. Qhov kev siv thiab homogeneity ntawm lub raj yog txiav txim los ntawm lawv qhov ceev thiab qhov chaw.
c. Lub Heat Sink
Thaum ua haujlwm, UV LEDs tsim hluav taws xob ntau. Cov cua sov no yog dissipated ntawm lub dab dej kub, feem ntau yog ua los ntawm txhuas, kom ntev lifespan thiab tsis txhob poob efficiency.
d. Tsav Circuitry
Hloov cov hluav taws xob AC nkag mus rau hauv DC voltage uas cov LEDs xav tau. Dimming, mem tes ua haujlwm, thiab wavelength tuning yog ua tau los ntawm cov neeg tsav tsheb siab heev.
d. Chaw nyob
Cov LEDs tau ntim rau hauv quartz lossis fused silica raj uas cia UV teeb los ntawm thaum tiv thaiv lawv los ntawm ya raws thiab plua plav.
e. iav
UV teeb tuaj yeem raug tsom lossis diffused kom haum rau qee yam kev siv (xws li, nqaim kab rau kev kho kom raug).
Cov txiaj ntsig zoo piv rau cov teeb pom kev zoo UV
LED UV raj ua tau zoo dua li cov teeb mercury tsoos hauv ntau txoj hauv kev.
a. Tam sim no On / Off Function
Nyob rau hauv sib piv rau mercury teeb uas xav tau sij hawm los sov so, LEDs muaj siab tshaj plaws siv ceev ceev. Cov txheej txheem batch ua tau zoo dua li qhov tshwm sim.
a. Efficiency hauv Kev Siv Hluav Taws Xob
Nyob rau hauv sib piv rau mercury teeb, uas hloov ib ncig ntawm 10-15% ntawm hluav taws xob zog rau hauv UV teeb, LEDs hloov li 40-50%.
c. Mercury- Dawb
tshem tawm cov kev phom sij uas mercury pov tseg ua rau tib neeg noj qab haus huv thiab ib puag ncig.
d. Specification ntawm Wavelength
Nqaim spectral peaks emitted los ntawm LEDs tso cai rau meej lub hom phiaj ntawm pathogens los yog photoinitiators.
e. Lub neej ntev
Mercury teeb muaj lub neej ntev ntawm 1,000-5,000 teev, whereasLED UV tubesmuaj lifespan ntawm 10,000-50,000 teev.
LED UV Tube Applications a. UV kho
siv los ua cov ntaub ntawv polymerise sai hauv cov nplaum, txheej, thiab luam ntawv. Piv txwv li:
3D luam ntawv: UVA hluav taws xob ua rau UV resins kom khov.
Ntim: Inks raug kho ntawm cov zaub mov- nyab xeeb substrates siv LED UV teeb.
b. Disinfection thiab Sterilization
Cov kab mob, kab mob, thiab cov fungi tag nrho muaj lawv cov DNA thiab RNA rhuav tshem los ntawm UVC LEDs (260-280 nm). Ntawm cov kev siv yog:
Yog tsis muaj kev siv tshuaj, dej huv ua rau cov kab mob tsis ua haujlwm.
Cov cuab yeej kho mob: Sterilise qhov chaw thiab cov cuab yeej phais.
b. Inspection thiab Forensic
UV teeb tuaj yeem nthuav tawm cov khoom tsis raug, cov nyiaj cuav, lossis cov ntiv tes.
d. Kev ua vaj
UVA thiab UVB rays txhawb kev loj hlob ntawm cov nroj tsuag thiab ua kom cov synthesis ntawm phytochemicals.
Kev nyuaj thiab kev txwv
a. Tswj cua sov
Thaum tshav kub kub ua los ntawm siab -lub zog UV LEDs luv lawv lub neej thiab kev ua haujlwm. Cov tshuab cua txias niaj hnub yog qhov tseem ceeb.
b. Nqe
Txawm hais tias lawv pheej yig dua, UV LEDs tseem kim dua li cov teeb mercury.
c. Kev txwv ntawm kev siv zog
High - siv UVC emissions tseem nyuaj rau ua tiav technically.
Tom ntej no Cov Qauv
Miniaturisation: Portable gadgets nrog me me UV LEDs.
IoT- qhib cov raj nrog lub sijhawm saib xyuas tiag tiag yog cov piv txwv ntawm cov tshuab ntse.
Recycling cov ntaub ntawv tsis tshua muaj siv nyob rau hauv semiconductors yog ib qho piv txwv ntawm eco-kev tsim khoom zoo.
LED UV tubes, uas muab kev ruaj khov, raug, thiab ua haujlwm tau zoo, yog qhov kev nce qib tseem ceeb hauv UV thev naus laus zis. Cov ntawv thov xws li kev kho kom zoo rau lub neej-Txuag kom tsis muaj menyuam yog ua tau los ntawm kev siv cov khoom siv hluav taws xob semiconductor thiab sophisticated engineering. LED UV tshuab tau teeb tsa los hloov cov teeb pom kev zoo nyob rau hauv ntau qhov chaw raws li kev tshawb fawb txog cov nqi thiab cov teeb meem thermal txuas ntxiv, ua rau txoj hauv kev kom huv, zoo dua yav tom ntej.
