Puas yog Ultraviolet Radiation Zoo rau Pwm Kho?

Puas yog Ultraviolet Radiation Zoo rau Pwm Kho?

Pwm paug yog ib qho teeb meem tsis tu ncua hauv thaj chaw nyob, kev lag luam, thiab kev lag luam ib puag ncig. Los ntawm cov hauv qab daus thiab cov chav dej qab nthab mus rau HVAC ductwork thiab cov chaw ua zaub mov, pwm spores vam meej txhua qhov chaw noo noo thiab cov organic teeb meem sib ntsib. Tshaj li cov ntxhiab tsw tsis zoo thiab kev zoo nkauj, pwm ua rau muaj kev phom sij loj rau kev noj qab haus huv- ua rau muaj kev fab tshuaj, mob hawb pob, thiab mob ua pa nyuaj.

Txoj kev kho ib txwm siv -tshuaj biocides, tshem tawm lub cev, thiab txhim kho qhov cua-txhua tus muaj lawv cov kev txwv. Nyob rau hauv xyoo tas los no, ultraviolet-C (UVC) hluav taws xob tau txais kev saib xyuas raws li cov tshuaj tsis muaj tshuaj lom neeg, ua haujlwm sai rau kev tswj pwm. Tab sis nws puas ua haujlwm tiag? Thiab yog tias muaj, thaum twg thiab yuav siv li cas?

Kab lus no tshuaj xyuas cov pov thawj kev tshawb fawb tom qab UVC germicidal irradiation (UVGI) rau kev kho pwm, piv nrog rau lwm txoj hauv kev, thiab muab cov lus qhia siv tau rau kev nyab xeeb thiab siv tau zoo- txhawb nqa los ntawm cov ntaub ntawv tshawb fawb tiag tiag thiab cov ntaub ntawv ua lag luam tshiab.

Yuav ua li cas UVC Radiation ua haujlwm ntawm Pwm Spores

Yuav kom nkag siab seb UVC puas tuaj yeem kho pwm, peb yuav tsum xub saib nws lub hom phiaj: cov pwm spore. Spores yog cov txheej txheem kev ua me nyuam muaj peev xwm tsim kom muaj sia nyob hnyav. Lawv tuaj yeem nyob twj ywm rau ntau xyoo ua ntej germinating rau hauv pom cov cheeb tsam thaum ya raws rov qab.

UVC lub teeb -tshwj xeeb tshaj yog nyob rau hauv lub wavelength ib ncig254 nanometers ua-tsis yog "poison" pwm. Hloov chaw, nws lub cev puas tsuaj rau cov kab mob hauv cov khoom siv caj ces. Thaum cov kab mob pwm raug rau ib koob txaus ntawm UVC hluav taws xob, cov thymine nyob ib sab hauv nws DNA nqus photon zog thiab tsim cov kab mob sib txawv uas hu uathymine dimers. Qhov kev puas tsuaj ntawm cov qauv no cuam tshuam DNA replication thiab transcription, ua rau cov kab mob uas tsis tuaj yeem siv tau -tsis tuaj yeem tsim dua lossis ua rau muaj kab mob ntxiv. Los ntawm kev xav txog kev lom neeg, cov kab mob microorganism zoo "tuag" lossis sterilized.

UVC wavelength band zoo tshaj plaws ntawm microbial sterilization yog254nm ua, uas phim lub ncov nqus ntawm microbial DNA thiab RNA. UVC photons ntawm lub wavelength no muaj lub zog txaus los rhuav tshem DNA cov hlua ncaj qha, qhov ntev dua UVA (365 nm lossis 395 nm) tsis zoo tshwj tsis yog ua ke nrog cov khoom siv photocatalytic xws li TiO₂.

Txawm li cas los xij, qhov hloov pauv tseem ceeb yogkoob. Cov koob tshuaj UV germicidal yog cov khoom ntawm irradiance (kev siv) thiab lub sij hawm raug, ntsuas hauv µJ / cm² lossis mJ / cm². Kev tshawb fawb luam tawm hauvApplied thiab Environmental Microbiologyqhia tias ua tiav a99.9% inactivation tus nqirau cov pwm sab hauv tsev xws liAspergillus niger(dub pwm) thiabPenicilliumyuav tsum tau koob tshuaj UV nruab nrab10,000 thiab 30,000 µJ / cm²-hloov ntau dua li qhov xav tau ntawm cov kab mob feem ntau. Rau kev siv, cov kab mob hauv huab cua tuaj yeem tsis ua haujlwm ntawm koob tshuaj 2,000-8,000 µJ / cm².

Qhov kev sib txawv no yog vim muaj ntau yam:

• Cov phab ntsa tuabuas nqus los yog tawg UV photons ua ntej lawv mus txog DNA
• Tiv thaiv pigments(xws li melanin) muaj nyob rau hauv qee hom fungal uas nqus UV zog
• Multi-layered spore qauvuas xav tau kev puas tsuaj ntau ntxiv rau kev ua kom tiav

Nws tseem ceeb heev kom nco ntsoov tiaspwm hyphae-cov filamentous, vegetative structures uas tsim cov colony pom-yog cov resistant ntau tshaj spores vim lawv complex architecture thiab muaj peev xwm embedding nyob rau hauv cov ntaub ntawv ntxeem tau. Qhov no piav qhia tias vim li cas UVC thiaj li muaj txiaj ntsig zoocov spores saum npoo av thiab cov pos huab cuatab sis yogtsis txaus rau tsim, pom pwm coloniesloj hlob nyob rau hauv los yog nyob rau hauv cov ntaub ntawv xws li drywall, ntoo, los yog qab nthab vuas.

UVC vs. Lwm txoj kev kho pwm

Kev xaiv lub tswv yim kho kom raug yuav tsum muaj kev sib npaug, nqi, kev nyab xeeb, thiab kev ua tau zoo. Cov lus hauv qab no sib piv plaub txoj hauv kev:

Ntxiv rau plaub txoj kev no,kho ozoneyog qee zaum siv los kho pwm. Ozone (O₃) yog ib qho muaj zog oxidant uas tuaj yeem tua cov pwm spores hauv huab cua thiab ntawm qhov chaw. Txawm li cas los xij, ozone ua rau muaj kev nyab xeeb tseem ceeb -nws yog qhov ua pa ua pa uas tuaj yeem ua rau lub ntsws puas, thiab US FDA tau tshaj tawm cov lus ceeb toom nruj rau nws siv hauv qhov chaw nyob. Tsis zoo li UVC, uas yuav tsum tau raug ncaj qha, ozone diffuses mus rau hauv cov cheeb tsam, tab sis nws kuj tawm tom qab tsis muaj cov residues thiab yuav tsum tau muaj qhov cua dav tom qab kho. UV-C, los ntawm qhov sib txawv, muab cov tshuaj tua kab mob hauv tsev kho mob yam tsis muaj tshuaj lom lossis muaj kev phom sij rau kev noj qab haus huv thaum siv kom raug. Kev tshawb fawb tseem pom tau tias fogging (ib hom tshuaj dispersal feem ntau) tsis zoo dua li UV hluav taws xob, tshwj xeeb tshaj yog nyob rau hauv ntsug thiab downward-facing nto.

Daim ntawv thov tseem ceeb ntawm UVC rau Pwm Kho

UVC thev naus laus zis tsis yog ib qho loj-haum-tag nrho cov kev daws teeb meem. Nws txoj kev ua tau zoo nyob ntawm qhov kev thov kom raug. Hauv qab no yog thawj zaug siv qhov twg UVC muab cov txiaj ntsig pov thawj.

1. HVAC Coil thiab Nto Irradiation

Txias coils, ntws cov lauj kaub, thiab lim dej hauv HVAC systems yog qhov zoo tshaj plaws cog qoob loo rau pwm thiab biofilm. Cov cheeb tsam no yog txias, tsaus, thiab tsis tu ncua ntub los ntawm condensation. Thaum pwm tsim ntawm cov coils, nws tsis tsuas yog degrades sab hauv huab cua zoo, tab sis kuj insulates lub coil nto, txo cov hluav taws xob hloov hluav taws xob thiab tsav cov nqi hluav taws xob.

Txhim kho UVC teeb ncaj qha saum evaporator coils txuas ntxiv irradiates lub coil nto, tiv thaiv pwm thiab biofilm buildup. Daim ntawv thov no muaj txiaj ntsig tshwj xeeb vim tias:

• Cov irradiated nto yogsmooth thiab non-porous, tso cai rau tag nrho UV raug
• Qhov ze ze ntawm lub teeb rau coils (feem ntau 6-12 ntiv tes) ua kom cov qib irradiance siab
• Teeb tuaj yeem ua haujlwm 24/7, muab kev tiv thaiv txuas ntxiv

Ib txoj kev tshawb fawb luam tawm nyob rau hauv lubASHRAE Journalpom tias UV-C systems tau nruab rau hauv HVAC cov chav ua kom txias coils huv si, khaws cia HVAC efficiency thiab txo qis kev siv zog thiab kev siv nyiaj ntau. UVC coil irradiation kuj txo cov kev siv hluav taws xob los ntawm kev rov ua kom cov cua sov hloov pauv, nrog qee qhov chaw tshaj tawm txog li 15-20% kev txuag hluav taws xob tom qab kev teeb tsa.

2. Cua-Stream Disinfection

Ntxiv nrog rau cov coil irradiation, UVC teeb tau teeb tsa hauv cov chav ua haujlwm huab cua (AHUs) lossis ductwork tuaj yeem tua cov kab mob txav mus los "ntawm-tus-fly." Raws li huab cua dhau los ntawm UV teb, huab cua spores spores yog inactivated ua ntej lawv tuaj yeem mus rau hauv qhov chaw nyob. Cov qauv tsim kom zoo tuaj yeem ua tiavmus txog 99% pathogen inactivation nyob rau hauv ib zaug xwb.

Upper-room UV-C yog lwm qhov kev teeb tsa pov thawj. Cov teeb yog ntsia ze ntawm lub qab nthab, tsim kom muaj cov kab mob tua kab mob saum toj no tus neeg nyob qhov siab thaum lub qhov rooj tiv thaiv louvers tiv thaiv cov neeg hauv qab no. Txoj kev no tuaj yeem tsim ib qho ntxiv10-16 sib npaug huab cua hloov ib teev (eACH)rau cov tshuab ua pa uas twb muaj lawm-piv rau ntxiv cov huab cua sab nraum zoov ntawm ib feem ntawm tus nqi.

3. Kev kho mob thiab khoom noj khoom haus

UVGI cov tshuab tau dav siv hauv tsev kho mob, chaw kho mob, chav tsev tshuaj, thiab cov chaw ua zaub mov kom tsis txhob muaj kab mob microbial. Hauv cov chaw kho mob, UVC txo qis kev sib kis ntawm cov kab mob hauv huab cua xws li tuberculosis, MRSA, thiab mob khaub thuas- tiv thaiv cov neeg mob thiab cov kws kho mob.

Rau cov chaw ua tshuaj thiab zaub mov, UVGI pab tswj kom tsis muaj menyuam nyob ib puag ncig uas ua raws li cov qauv kev cai nruj xws li GMP thiab FDA cov cai. UVGI systems tau nruab rau hauv HVAC ducts thiab chav huv huv tiv thaiv huab cua pwm spores los ntawm kev sib kis ntawm cov chaw tsim khoom, ua kom cov khoom zoo thiab kev nyab xeeb.

4. Chaw nyob thiab kev lag luam huab cua purification

Portable UV air purifiers thiab in-duct UV systems tau nrov hauv tsev thiab cov tsev lag luam. Ib qho kev tshawb nrhiav tseem ceeb hauv kevAmerican Journal of Infection Controlpom tias UVC lub teeb tuaj yeem txo cov kab mob hauv huab cua-xws li pwm spores- txog li 99.9% hauv cov xwm txheej tswj. Ib txoj kev tshawb fawb ntev xyoo los ntawm EPA pom tias cov tsev neeg siv UVC purifiers qhia tsawg dua cov tsos mob ua xua thiab teeb meem ua pa. Kev tshawb fawb los ntawm National Renewable Energy Laboratory kuj pom tias UVC systems feem ntau xav tau kev saib xyuas tsawg dua thiab siv lub zog tsawg dua li cov lim dej HEPA ib txwm muaj, ua rau lawv muaj txiaj ntsig zoo thiab kev xaiv zoo rau huab cua huv.

Kev Tshawb Fawb Txog Kev Tshawb Fawb Txog Ntiaj Teb tiag thiab keeb kwm pov thawj

Qhov ua tau zoo ntawm UVGI rau kev kis kab mob thiab kev tswj pwm tsis yog tsuas yog theoretical- nws tau raug pom nyob rau hauv cov kev tshawb fawb nruj uas muaj ze li ib puas xyoo.

Hauv1937, tus kws kho mob kis mob William F. Wells tau teeb tsa lub teeb UV sab saud hauv cov tsev kawm ntawv hauv nroog Philadelphia txhawm rau tiv thaiv kab mob qhua pias. Cov tsev kawm ntawv uas muaj cov cuab yeej siv tau tsuas yog kis tus kab mob xwb13.3%, piv rau53.6%nyob rau hauv cov pej xeem sawv daws- ib tug loj heev 75% txo nyob rau hauv kev sib kis.

Tsis ntev los no, kev tshawb fawb peb xyoos tau luam tawm nyob rau hauvPhau ntawv Journal ntawm American Veterinary Medical Associationdocumented ib87.1% txonyob rau hauv cov kab mob ua pa sab sauv tom qab kev teeb tsa cov kiv cua-integrated high-chav UV-C systems nyob rau hauv ib tug high-density tu tsiaj. Raws li ASHRAE's Position Document on Infectious Aerosols, UV-C tau lees paub tias yog ib qho ntawm peb txoj hauv kev ua pov thawj rau kev tiv thaiv kab mob hauv huab cua, nrog rau qhov cua thiab qhov pom ntawm qhov pom. CDC thiab NIOSH tshwj xeeb pom zoo rau chav sab sauv UVGI rau kev txhim kho kev tswj hwm ntawm cov kab mob sib kis tau zoo heev.

Kev xav txog kev nyab xeeb: UVC Yuav tsum muaj kev hwm

UVC yog qhov ua tau zoo, tab sis nws kuj muaj kev phom sij rau tib neeg cov tawv nqaij thiab qhov muag. Kev raug ncaj qha tuaj yeem ua rau photokeratitis (mob "sunburn ntawm lub qhov muag") thiab erythema ( tawv nqaij hlawv). ACGIH Threshold Limit Value (TLV) rau chav sab sauv UVC raug teeb tsa ntawm6.0 mJ/cm²-tau dhau qhov kev txwv no tuaj yeem ua rau mob pob txha.

Kev ntsuas kev nyab xeeb tseem ceeb suav nrog:

• Engineering tswj:Muab cov khoom siv UVC nyob rau hauv cov vaj tsev opaque, txhim kho cov txheej txheem sib cuam tshuam uas kaw lub teeb thaum lub kaw lus qhib, thiab siv cov ntaub thaiv npog kom muaj cov hluav taws xob tsis zoo.
• Cov khoom siv tiv thaiv tus kheej:Siv cov looj tsom iav tiv thaiv UV thaiv kev nyab xeeb uas tau lees paub rau ANSI Z87.1 lossis EN 170 tus qauv, nrog rau lub tes tsho ntev, hnab looj tes tiv thaiv UV, thiab aprons
• Kev tswj hwm kev tswj hwm:Qhia tag nrho cov neeg ua haujlwm ntawm kev phom sij UV, tshaj tawm ntau yam lus ceeb toom kos npe, thiab ua raws li cov lus qhia txwv tsis pub dhau los ntawm cov koom haum xws li ACGIH thiab NIOSH

Hauv Tebchaws Meskas, cov khoom siv tshuaj tua kab mob UVC feem ntau yog tswj hwm los ntawm FDA raws li Chav Kawm II (kev pheej hmoo txaus ntshai) cov khoom siv kho mob, xav tau Kev Ceeb Toom Ua Ntej [510(k)] los ua kom pom kev nyab xeeb thiab ua tau zoo. Cov neeg tsim khoom yuav tsum tau sau npe nrog EPA raws li FIFRA thiab zam kev tsis lees paub.

Kev Loj Hlob UV Disinfection Market

Kev lag luam thoob ntiaj teb rau kev siv tshuaj tua kab mob UV tau nthuav dav sai, uas tau tsav los ntawm kev paub ntau ntxiv ntawm cov huab cua hauv tsev, kev tswj xyuas cov tshuaj tua kab mob tsis muaj tshuaj lom, thiab kev siv thev naus laus zis hauv UVC LEDs.

Cov tsav tsheb tseem ceeb ntawm txoj kev loj hlob no suav nrog:

• Mercury teeb theem tawm cov cainyob rau hauv Minamata Convention, ua kom ceev ceev ntawm mercury-dawb UVC LEDs
• Kev paub txog tom qab kis thoob qhov txhia chawntawm kev pheej hmoo kis tau tus mob hauv huab cua, nce kev thov rau huab cua thiab cov tshuaj tua kab mob saum npoo
• Kev txawj ntsenyob rau hauv UVC LED efficiency thiab txo tus nqi-UVC LEDs tam sim no muab kev tiv thaiv kev ua haujlwm zoo piv rau, thiab qee zaum zoo dua li, cov roj mercury vapor teeb
• Kev koom ua ke ntseUa kom muaj cov kab mob tua kab mob tsis siv neeg, kev soj ntsuam neeg nyob, thiab kev saib xyuas tej thaj chaw deb

Kev taw qhia tswv yim: Thaum twg siv UVC rau kev kho pwm

Raws li cov pov thawj scientific tshuaj xyuas, ntawm no yog lub tswv yim kev txiav txim siab:

UVC yog qhov kev xaiv zoo rau:

• Tiv thaiv pwm kev loj hlob ntawm HVAC coils, ntws yias, thiab lim cua
• Txo cov huab cua los ntawm cov pwm spores concentrations nyob rau hauv qhov chaw nyob (ntawm chav tsev sab sauv lossis hauv-duct systems)
• Disinfecting smooth, non-porous nto qhov twg kab-ntawm-pom pom tau
• Muab kev tswj xyuas tas li, tsis muaj tshuaj lom neeg pwm nyob rau hauv ib puag ncig rhiab (kev noj qab haus huv, kev ua zaub mov, chav tsev tshuaj)

UVC tsis yog qhov hloov pauv rau:

• Tshem tawm cov pwm tsim, pom cov cheeb tsam ntawm cov khoom ntxeem tau (drywall, ntoo, qab nthab vuas, ntaub pua plag)
• Hais txog qhov teeb meem ntawm cov dej noo hauv qab (xws li, high humidity, condensation)
• Kev tshem tawm lub cev ntawm cov khoom uas muaj kab mob hnyav heev- cov no yuav tsum tau txiav tawm thiab hloov

Ib qho kev sib xyaw ua ke yog qhov zoo tshaj plaws:Siv UVC los ua ib qho cuab yeej ntxiv nyob rau hauv cov txheej txheem tswj pwm zoo uas suav nrog kev tswj cov dej noo (tswj cov av noo hauv tsev ntawm 30-50%), tshem tawm cov khoom tsis huv hauv lub cev, thiab ua kom muaj cua zoo. Kev koom ua ke UV tshuaj tua kab mob thev naus laus zis rau hauv HVAC systems tau lees paub tias yog ib qho tseem ceeb ntawm kev tswj xyuas cov chaw niaj hnub no.

Yog li, puas yog ultraviolet hluav taws xob zoo rau kev kho pwm?Tau-tab sis nrog cov lus ceeb toom tseem ceeb.UVC lub teeb, tshwj xeeb tshaj yog nyob rau ntawm 254 nm, yog kev tshawb fawb pov thawj rau inactivate pwm spores los ntawm kev puas tsuaj rau lawv cov DNA, ua tiav mus txog 99.9% txo nyob rau hauv kev tswj tej yam kev mob. Nws muab cov txiaj ntsig tseem ceeb ntawm cov tshuaj biocides: tsis muaj tshuaj lom, tsis muaj VOCs, kev ua haujlwm sai, thiab kev sib raug zoo nrog kev ua haujlwm ntse. Txawm li cas los xij, nws cov txiaj ntsig tsuas yog txwv raudirect line-of-sightraug rausmooth, non-porous ntolos yog hauvtxav cua ntws. Nws tsis tuaj yeem nkag mus rau cov ntaub ntawv ntxeem tau lossis tshem tawm cov hyphae tob tob.

Rau cov thawj coj hauv tsev thiab cov tswv tsev, lub tswv yim zoo tshaj plaws yogintegrated pwm tswj: hais txog qhov chaw noo noo ua ntej, tshem tawm cov khoom uas muaj paug hnyav heev, thiab siv UVC ua cov cuab yeej tsis tu ncua, tsis muaj tshuaj lom neeg rau kev tiv thaiv saum npoo thiab tshuaj tua kab mob hauv huab cua. Thaum siv kom raug, UVGI thev naus laus zis muab kev ntsuas ntsuas tau zoo hauv huab cua sab hauv tsev, txo cov tsos mob ua xua, txo HVAC cov nqi tu, thiab txhim kho cov neeg nyob hauv kev noj qab haus huv- ua rau nws muaj txiaj ntsig zoo rau txhua lub tsev.