Vim li cas UVC LED tshuaj tua kab mob ua haujlwm zoo tshaj plaws ntawm lub wavelength ntawm 254 nm?
uvb yog ib hom teeb uas coj lub hnub ci. Nyob rau hauv rooj plaub uas tsis muaj hnub ci, lub teeb no tuaj yeem siv tau
UV Teeb - Ultraviolet Germicidal Teeb
Classification ntawm UV rays:
Raws li cov txiaj ntsig sib txawv, cov kab hluav taws xob ultraviolet tau muab faib ua plaub pawg raws li wavelength:
UVA band, wavelength 320 400nm, also known as long-wave dark spot effect ultraviolet. It has strong penetrating power and can penetrate most transparent glass and plastics. More than 98 percent of the long-wave ultraviolet rays contained in sunlight can penetrate the ozone layer and cloud layer to reach the earth's surface. UVA can directly reach the dermis of the skin, destroy elastic fibers and collagen fibers, and tan our skin. The UVA ultraviolet rays with wavelength of 360nm are in line with the phototaxis response curve of insects, and can be used to make trap lights. UVA ultraviolet rays with wavelengths of 300-420nm can pass through special colored glass lamps that completely cut off visible light, and only radiate near-ultraviolet light centered at 365nm, which can be used in ore identification, stage decoration, banknote inspection and other places.
UVB band, wavelength 275 320nm, also known as medium wave erythema effect ultraviolet. Medium penetrating power, its shorter wavelength part will be absorbed by transparent glass, most of the medium-wave ultraviolet rays contained in sunlight are absorbed by the ozone layer, and only less than 2 percent can reach the earth's surface, which is especially strong in summer and afternoon. UVB ultraviolet rays have an erythematous effect on the human body, which can promote the metabolism of minerals and the formation of vitamin D in the body, but long-term or excessive exposure will tan the skin and cause redness and peeling. Ultraviolet health lamps and plant growth lamps are made of special transparent violet glass (which does not transmit light below 254nm) and phosphors with a peak value around 300nm.
UVC band, wavelength 200 275nm, tseem hu ua luv -wave sterilization ultraviolet. Nws muaj peev xwm nkag mus tsis muaj zog tshaj plaws thiab tsis tuaj yeem nkag mus rau feem ntau pob tshab iav thiab yas. Qhov luv -wave ultraviolet rays uas muaj nyob rau hauv tshav ntuj yog yuav luag tag absorbed los ntawm ozone txheej. luv- wave ultraviolet rays yog qhov teeb meem rau tib neeg lub cev. Lub sij hawm luv luv - tuaj yeem hlawv daim tawv nqaij. Ntev -lub sij hawm los yog siab - kis tau tus mob tuaj yeem ua rau mob qog noj ntshav. Ultraviolet germicidal teeb emit UVC luv-yoj ultraviolet rays.
UVD band, wavelength 100 200nm, tseem hu ua lub tshuab nqus tsev ultraviolet.
Lub hauv paus ntsiab lus ntawm sterilization ntawm ultraviolet lub teeb
Ultraviolet sterilization yog los rhuav tshem thiab hloov DNA (deoxyribonucleic acid) qauv ntawm cov kab mob los ntawm irradiation ntawm ultraviolet rays, thiaj li hais tias cov kab mob tam sim ntawd tuag los yog tsis tuaj yeem rov ua dua, thiaj li ua tiav lub hom phiaj ntawm kev ua kom tsis muaj menyuam. Dab tsi tiag tiag muaj cov kab mob bactericidal yog UVC ultraviolet rays, vim C-band ultraviolet rays tau yooj yim nqus los ntawm DNA ntawm cov kab mob, tshwj xeeb tshaj yog cov kab hluav taws xob ultraviolet nyob ib ncig ntawm 253.7nm.
Ultraviolet sterilization yog ib txoj kev siv tshuaj tua kab mob hauv lub cev, uas muaj qhov zoo ntawm kev yooj yim thiab yooj yim, dav -spectrum efficiency, tsis muaj kuab paug theem nrab, yooj yim tswj thiab automation. nthuav.
Cov qauv ntawm ultraviolet germicidal teeb
Ultraviolet germicidal teeb (UV teeb) tiag tiag yog qhov qis - siab mercury teeb. Zoo li cov teeb fluorescent zoo tib yam, nws tawm cov kab hluav taws xob ultraviolet tom qab zoo siab los ntawm qhov qis -siab mercury vapor (<10-2pa). the="" difference="" is="" that="" the="" lamp="" tube="" of="" the="" fluorescent="" lamp="" is="" made="" of="" ordinary="" glass,="" and="" the="" 254nm="" ultraviolet="" rays="" cannot="" penetrate,="" and="" can="" only="" be="" absorbed="" by="" the="" fluorescent="" powder="" on="" the="" inner="" wall="" of="" the="" lamp="" tube="" to="" excite="" visible="" light.="" if="" you="" change="" the="" composition="" and="" proportions="" of="" the="" phosphor,="" it="" can="" emit="" different="" colors="" of="" light="" that="" we="" usually="" see.="" generally,="" the="" lamps="" of="" germicidal="" lamps="" are="" made="" of="" quartz="" glass,="" because="" quartz="" glass="" has="" a="" high="" transmittance="" of="" ultraviolet="" rays="" in="" various="" bands,="" reaching="" 80%-90%,="" which="" is="" the="" best="" material="" for="" germicidal="">
Germicidal teeb muaj ntau yam qauv xws li kub cathode tsis tshua muaj siab mercury vapor discharge teeb thiab txias cathode tsis tshua muaj siab mercury vapor discharge teeb, uas tuaj yeem muab faib ua ntau hom raws li qhov pom thiab lub zog.
Quartz iav yog qhov sib txawv ntawm cov iav zoo tib yam hauv kev ua tau zoo, feem ntau yog vim qhov sib txawv ntawm thermal expansion coefficient, thiab feem ntau tsis tuaj yeem raug kaw nrog txhuas lub hau.
UV germicidal teeb lub raj
Vim qhov sib txawv ntawm tus nqi thiab kev siv, siab borax iav raj nrog UV transmittance< 50%="" are="" also="" used="" instead="" of="" quartz="" glass.="" the="" production="" process="" of="" high="" boron="" glass="" is="" the="" same="" as="" that="" of="" energy-saving="" lamps,="" so="" the="" cost="" is="" very="" low,="" but="" its="" performance="" is="" far="" less="" than="" that="" of="" quartz="" germicidal="" lamps,="" and="" its="" sterilization="" effect="" is="" quite="">
Lub teeb ci ultraviolet siab ntawm siab -boron teeb tau yooj yim attenuated, thiab ultraviolet lub teeb siv zog poob qis mus rau 50 feem pua -70 feem pua ntawm cov nqi pib tom qab ntau pua teev ntawm cov teeb pom kev zoo. Tom qab lub teeb quartz yog ignited rau 2000-3000 teev, qhov kev siv ultraviolet tsuas yog txo mus rau 80 feem pua -70 feem pua ntawm lub sij hawm pib, thiab lub teeb decay degree tsawg dua li ntawm high-boron teeb.
Nws kuj yog ib hom iav zoo tib yam nrog siab dua ultraviolet lub teeb kis tau tus mob, uas yog ntau dua li siab boron iav thiab me ntsis qis dua quartz iav. Txawm li cas los xij, lub teeb lwj loj dua li ntawm quartz germicidal teeb, thiab nws tsis tuaj yeem tsim ozone. Lub raj ntawm lub teeb hluav taws xob tsim los ntawm Philips yog ua los ntawm cov iav no.
Hom ntawm UV germicidal teeb
Cov emitting spectral kab ntawm ultraviolet germicidal teeb yog 254nm thiab 185nm. 254nm ultraviolet rays tua cov kab mob los ntawm irradiating DNA ntawm cov kab mob, thiab 185nm ultraviolet rays tuaj yeem tig O2 hauv huab cua mus rau O3 (ozone). Ozone muaj zog oxidizing nyhuv thiab tuaj yeem tua cov kab mob zoo. Kev nthuav tawm thiab tshuaj tua kab mob raws txoj kab ncaj nraim muaj qhov tsis zoo ntawm cov fab tuag.
Thaum lub quartz iav yog refined, yog hais tias ib tug txaus npaum li cas ntawm titanium (Ti) lub ntsiab yog ntxiv, lub ultraviolet rays dhau los ntawm nws yuav raug txiav tawm hauv qab no 200nm, thiab nws yeej tsis cuam tshuam rau kev sib kis ntawm 254nm ultraviolet rays. Kev tswj kom tsim nyog ntawm cov nyiaj titanium ntxiv tuaj yeem tswj tau qhov kev khiav tawm ntawm 185nm ultraviolet rays. Raws li qhov tshwj xeeb no, peb tuaj yeem ua peb hom teeb ci ultraviolet germicidal teeb, xws li qis ozone (tsis muaj ozone), ozone thiab siab ozone.
Daim ntawv thov ntawm UV germicidal teeb
1. Each microorganism has its specific ultraviolet ray killing and death dose standard, and its dose is the product of irradiation intensity and irradiation time (bactericidal dose=irradiation intensity·irradiation time/K=I·t), that is, the irradiation dose of ultraviolet rays. It depends on the intensity of ultraviolet rays and the length of irradiation time. The effect of high-intensity short-time irradiation and low-intensity long-time irradiation is the same.
2. Quartz teeb yuav maj mam muaj hnub nyoog tom qab siv rau lub sijhawm, thiab kev siv hluav taws xob ultraviolet yuav poob qis. Txhawm rau kom ua tiav cov txiaj ntsig ntawm cov tshuaj tua kab mob tag nrho, cov irradiation siv ntawm quartz teeb yuav tsum tau kuaj xyuas tsis tu ncua, thiab yog tias qhov siv tau pom tias tsis txaus, nws yuav tsum tau hloov tam sim ntawd.
3. Cov kab hluav taws xob ultraviolet tsuas tuaj yeem taug kev ncaj nraim, thiab lub peev xwm nkag mus tau tsis muaj zog. Txhua daim ntawv, txhuas iav, los yog yas yuav txo tau qhov kev siv irradiation. Yog li ntawd, thaum ua kom tsis muaj menyuam, sim ua kom tag nrho qhov chaw tsis muaj menyuam rau ultraviolet rays, thiab so lub teeb lub raj tsis tu ncua kom tsis txhob cuam tshuam rau ultraviolet nkag mus thiab irradiation siv.
4. Cov kab hluav taws xob ultraviolet tuaj yeem ua rau muaj kev puas tsuaj loj rau cov tawv nqaij ntawm tib neeg lub cev. Tsis txhob siv UV teeb nyob rau hauv qhov chaw uas muaj neeg, thiab tsis txhob saib ncaj qha ntawm lub teeb ignited. Vim tias luv luv - wave ultraviolet rays tsis tuaj yeem dhau los ntawm iav zoo tib yam, hnav tsom iav tuaj yeem zam tau. Qhov muag puas.
5. Ozone lamps are generally not used in places where there are personnel activities, because ozone will promote the coagulation of human hemoglobin, resulting in insufficient oxygen supply to the human body, dizziness, nausea, and affecting health, especially when the ozone concentration reaches >0.3ppm (mg/m2), nws yuav ua rau mob hnyav rau tib neeg lub cev.
6. Lub teeb liab doog - xiav lub teeb nyob rau hauv qhov qis - lub teeb tso tawm siab yog lub mercury vapor siab. Txawm hais tias qhov kev siv ntawm mercury vapor siab tseem cuam tshuam nrog lub teeb ultraviolet, nws tsis ncaj qha sawv cev rau kev siv ntawm lub teeb ultraviolet, uas txhais tau hais tias qhov siv ntawm lub teeb ultraviolet tsis tuaj yeem siv los ntawm qhov muag liab qab. txiav txim.
7. Cov teeb thiab cov teeb pom kev zoo tuaj yeem ua kom muaj zog ntawm ultraviolet lub zog, thiab tuaj yeem zam kev puas tsuaj rau cov neeg ua haujlwm. Lub reflector yuav tsum tau ua los ntawm cov ntaub ntawv uas nyiam tsawg thiab muaj kev cuam tshuam ntau rau 253.7nm ultraviolet cov ntaub ntawv. Qhov saum npoo oxidation thiab polishing ntawm txhuas muaj qhov zoo tshaj plaws reflection coefficient rau luv luv -wave ultraviolet rays, yog li lub reflector system ntawm lub teeb ultraviolet yog ua los ntawm txhuas.
Teeb meem nrog UV germicidal teeb
1. Cov txheej txheem tshwj xeeb, kev tsim khoom yog qhov nyuaj, thiab tus nqi siab. Vim muaj cov khoom tshwj xeeb ntawm quartz iav, kev tsim cov roj teeb germicidal tsis tuaj yeem ntsuas, ua rau cov nqi siab ntawm quartz germicidal teeb thiab cuam tshuam nws cov kev txhawb nqa ntxiv thiab daim ntawv thov.
2. Lub teeb lwj yog qhov loj thiab lub neej tsis ntev. Tom qab lub teeb hluav taws xob ultraviolet tau teeb rau ntau pua teev, nws lub teeb ci ultraviolet attenuates sai heev, mus txog 30 feem pua, thiab cov nyhuv sterilization tsis muaj zog heev. Tsis tas li ntawd, kev puas tsuaj cathode los ntawm kev ua haujlwm kuj tseem cuam tshuam rau lub neej ntawm UV germicidal teeb. Txij li thaum lub teeb lwj ntawm ultraviolet germicidal teeb thiab fluorescent teeb tsis zoo ib yam hauv cov txheej txheem, qhov teeb meem no tseem yuav tsum tau daws los ntawm txhua tog.
3. Vim yog cov ntaub ntawv filament thiab cathode sib txawv, UV teeb nrog lub zog tib yam li T8 thiab T5 fluorescent teeb tsis tuaj yeem tsav los ntawm tib lub ballast.
