Niaj hnub nimno teeb pom kev zoo tau hloov pauv los ntawm lub teeb -emitting diode (LED) thev naus laus zis, uas muab lub zog ua haujlwm, ua haujlwm ntev, thiab ntau yam. Cov ntsiab lus ntawm sebLED teeboverheat thiab yuav ua li cas lawv tswj thermal tso zis nyob rau hauv kev sib piv rau incandescent los yog fluorescent qhov muag teev yog tseem nquag nug, ho. Txawm hais tias LEDs nquag txhawb nqa raws li "txias" kev xaiv teeb pom kev zoo, kev tsim hluav taws xob tseem muaj peev xwm. Kab lus no piv cov kev tswj xyuas thermal ntawm LEDs rau cov teeb pom kev zoo, tshawb xyuas cov kev tshawb fawb txog kev tsim hluav taws xob LED, thiab saib cov txiaj ntsig rau lub neej, kev ua haujlwm, thiab kev nyab xeeb.
Thaum tshav kub kub -Tsim LEDs ua haujlwm li cas?
LEDs ua kom muaj cua sov, tsis zoo li ntau tus neeg xav, tab sis lawv cov kev ua haujlwm txawv heev ntawm cov cuab yeej teeb pom kev yav dhau los.
Kev Tshawb Fawb Txog Kev Kub Ntxhov los ntawm LEDs
Electroluminescence, txheej txheem uas hluav taws xob ntws los ntawm cov khoom siv semiconductor, ua kom cov electrons thiab tso tawm photons (lub teeb), yog li LEDs tsim lub teeb. Tsis yog txhua lub zog, txawm li cas los xij, hloov mus rau hauv lub teeb. Lub semiconductor hlws ris, uas yog qhov chaw nruab nrab ntawm LED nti, yog nyob ib ncig ntawm 70-80% ntawm cov hluav taws xob hluav taws xob hauv LEDs hloov mus rau cua sov. Txhawm rau ua kom lub diode ua haujlwm thiab zam kev puas tsuaj, cov cua sov no yuav tsum tau tso tawm.
Qhov tseem ceeb Distinctions los ntawm cov laus qhov muag teev
Tungsten filaments yog rhuab kom txog thaum lawv ci nyob rau hauv incandescent teeb. Lawv poob ntau dua 90% ntawm lawv lub zog raws li cov cua sov uas radiates li infrared tawg. Muaj kev pheej hmoo ntawm kev kub nyhiab vim lub iav qhov muag tau kub heev.
Fluorescent teeb: Cov teeb fluorescent emit lub teeb los ntawm kev siv cov phosphor txheej thiab mercury vapor. Kwv yees li ntawm 80% ntawm lawv lub zog poob raws li cov cua sov, uas yog tsim los ntawm cov electrodes thiab los ntawm ballast.
LEDs tsim hluav taws xob tsawg dua tag nrho, tab sis vim tias lawv qhov me me, cov cua sov yog tsom rau ntawm kev sib tshuam, xav tau kev tswj xyuas thermal kom tsis txhob ntxov ntxov.
LED Thermal Management piv nrog cov pa taws
Lub neej ntev, kev nyab xeeb, thiab kev ua tau zoo ntawm cov teeb pom kev zoo yog txhua yam cuam tshuam los ntawm kev tswj cov cua sov li cas.
1. LED Thaum tshav kub kub dissipation
Txhawm rau tshem tawm cov cua sov los ntawm semiconductor, LEDs siv ob qho tib si passive thiab nquag ua kom txias cov txheej txheem:
Heat Sinks: Cov dab dej kub ua los ntawm tooj liab lossis txhuas siv cov khoom siv los nqus thiab faib cov cua sov. Lawv finned designs optimize airflow nto cheeb tsam.
Thermal pads thiab adhesives: Cov tshuaj no ua rau kom muaj cua sov los ntawm kev txhim kho kev sib cuag ntawm LED nti thiab lub dab dej kub.
PCB Tsim: Cov dab dej kub thib ob yog tsim los ntawm cov ntawv luam tawm Circuit Board (PCBs) nrog cov hlau cores, xws li txhuas PCBs.
Kev ua kom txias txias: Txhawm rau kom cov cua sov sai sai, siab - lub zog LEDs (xws li cov teeb pom kev hauv chaw ntau pob) tuaj yeem siv cov kua cua txias lossis kiv cua.
Piv txwv li: Txhawm rau tshem tawm cov cua sov los ntawm diode, tus qauv LED qhov muag teeb suav nrog lub dab dej kub hauv nws lub hauv paus, uas feem ntau muab zais tom qab lub hnab yas.
2. Tswj cov cua sov hauv cov qhov muag teeb qub
Incandescent teeb teeb tso cua sov rau hauv cov huab cua ib puag ncig. Txawm hais tias thermal tswj tsis tas yuav tsum tau, cov cua kub ntau dhau tuaj yeem ua rau cov khoom siv los yog cov khoom sib txuas.
Ballasts yog siv nyob rau hauv fluorescent raj los tswj tam sim no thiab qis electrode cua sov. Thaum tshav kub kub tsub zuj zuj, txawm li cas los xij, tuaj yeem txo lub neej ntawm cov khoom siv hauv tsev.
Kev sib piv ntawm Kub
LEDs: Qhov kub ntawm qhov nruab nrab ntawm 30 txog 50℃(86 txog 122℃F), thaum ua haujlwm ntawm 60 txog 85℃(140 txog 185℃F) ntawm qhov sib tshuam.
Cov filaments ntawm incandescent qhov muag teev yuav ncav cuag 2,500℃(4,532℃F), thaum qhov kub thiab txias tshaj 150℃(302℃F).
Ballasts hauv cov raj fluorescent tuaj yeem ncav cuag 100℃(212℃F), tab sis qhov kub thiab txias feem ntau yog nyob nruab nrab ntawm 40 thiab 50℃(104 thiab 122℃F).
Txawm hais tias LEDs ua haujlwm zoo dua tag nrho, lawv cov cua sov hauv cheeb tsam yuav tsum tau ua tib zoo tswj kom tsis txhob "thermal runaway," ib qho xwm txheej uas lub diode qhov kev ua tau zoo tsis zoo thaum kub nce.
Yog vim li cas overheating tseem ceeb: kev phom sij thiab cuam tshuam
Kev tswj xyuas qhov kub tsis txaus LED tuaj yeem ua rau:
Txo qis Lifespan: Lumen degradation yog nrawm los ntawm qhov kub thiab txias. Yog tias overheated, LEDs nrog qhov ntsuas 50,000-teev yuav ua tsis tiav hauv 10,000 teev.
Xim Hloov: Tsis xav tau xim hloov, xws li xiav tints, yog tshwm sim los ntawm tshav kub tawg cov phosphor txheej hauv cov LEDs dawb.
Efficiency Poob: Cov cua kub ntau dhau ua rau cov khoom siv hluav taws xob ua kom muaj zog dua, uas txo cov teeb pom kev zoo ib watt.
Kev Nyab Xeeb Kev Nyab Xeeb: Txawm hais tias tsis tshua muaj, kev kub siab ntev tuaj yeem ua mob rau cov neeg tsav tsheb lossis ua rau cov khoom siv hluav taws xob hauv cov khoom siv tsis zoo los ua hluav taws.
Ib qho Kev Ntsuam Xyuas ntawm Cov Khoom Siv Hluav Taws Xob
Yog tias tsis muaj qhov cua txaus, LED qhov muag teev siv nyob rau hauv cov khoom sib txuas-zoo li lub teeb qab nthab- nquag overheat. Vim hais tias cov pa LEDs yuav ua tsis tau sai heev nyob rau hauv cov chaw kaw, manufacturers qhia yog hais tias ib lub teeb raug ntsuas rau tej qhov chaw.
Innovations nyob rau hauv Thermal Management rau LED Tsim
Kev txhim kho hauv engineering thiab cov ntaub ntawv science tau txhim khoLEDThaum tshav kub kub dissipation:
1. Technology hu ua Chip-on-Board (COB)
Los ntawm ncaj qha mounting ntau diodes ntawm ib tug substrate, COB LEDs disperse tshav kub nyob rau hauv ib tug ntau dua deg cheeb tsam. Kev ua tau zoo yog nce thiab qhov kub ntawm qhov sib txuas tau txo qis vim qhov tshwm sim.
2. Cov pob khoom ua los ntawm Ceramic
Ceramic vaj tse, tsis zoo li cov yas, muab cov thermal conductivity zoo dua thiab ua kom muaj zog tiv thaiv kev kub ntxhov hauv siab -kawg LEDs.
3. Intelligent Thermal Retraction
Txhawm rau tiv thaiv kev puas tsuaj, qee tus neeg tsav tsheb muaj cov sensors uas, nyob rau hauv qhov xwm txheej uas qhov kub siab tshaj qhov kev cia siab, dim lossis tua lub LED.
4. Thaum tshav kub kub Spreaders ua los ntawm Graphene
Graphene khaubncaws sab nraud povtseg yog siv nyob rau hauv kev sim LEDs los txhim kho cua sov dissipation, uas tej zaum yuav hloov tag nrho thermal tswj.
Daim ntawv thov ntawm LED thiab cov pa roj teeb: Kev sib piv
Qhov twg thiab yuav ua li cas qee qhov muag teev tau raug cuam tshuam los ntawm thermal tso zis:
Tsev neeg ib puag ncig
Yog hais tias raug ntsuas,LED tube teebyog zoo meej rau kev teeb tsa dimmable, kaw qhov rooj, thiab teeb ua haujlwm. Cov chaw uas tsis muaj cua txaus ua rau muaj kev phom sij ntawm overheating.
Incandescents: Phais tawm vim lawv tsis muaj peev xwm thiab muaj hluav taws kub.
Cov fluorescents yuav tsum tsis txhob siv hauv tsev vim lawv qhov sov so qeeb heev - nce lub sij hawm thiab cov ntsiab lus mercury.
Kev Lag Luam / Kev Lag Luam Ib puag ncig
Vim tias lawv cov qauv tsim thiab cov dab dej muaj zog, LEDs yog cov qauv kev lag luam rau siab - teeb pom kev zoo, kos npe, thiab qhov chaw sab nraum zoov.
Hlau Halide/HPS: Qee lub tsev khaws khoom tseem siv cov qub siab tshaj - siv qhov hluav taws xob tawm (HID) qhov muag teev, tab sis cov no yuav tsum tau hloov ntau zaus thiab ua kom muaj cua sov ntau dhau.
Txoj hauv kev zoo tshaj plaws kom tsis txhob LED overheating
Xaiv lub Fixture kom zoo: Rau siab -wattage LEDs, siv qhib los yog zoo-ventilated fixtures.
Txheeb xyuas qhov ntsuas qhov chaw kaw: Yog tias tsim nyog, xyuas kom tseeb tias cov teeb pom kev zoo rau thaj chaw kaw.
Tsis txhob overdriving LEDs: Thaum tshav kub kub tso zis ntau zog thaum voltage ntau tshaj qhov pom zoo.
Kev Kho Ncua Sijhawm: Txhawm rau kom cov cua ntws mus, cov plua plav cua sov.
LEDs yog txias dua tab sis tseem raug rau cua sov.
LEDs muaj kev nyab xeeb dua thiab muaj zog ntau dua -ntau dua li cov teeb pom kev zoo lossis cov teeb fluorescent vim lawv tsim hluav taws xob tsawg dua. Txawm li cas los xij, yuav tsum tau ceev faj txog kev tswj xyuas thermal vim lawv cov khoom siv hluav taws xob hauv cheeb tsam ntawm cov khoom siv hluav taws xob sib txuas. Niaj hnub nimno LEDs muaj qhov tsis sib haum xeeb thiab kev ua haujlwm zoo thaum txo qhov kev pheej hmoo ntawm overheating ua tsaug rau cov dab dej kub, cov ntaub ntawv zoo, thiab kev tsim ntse. LEDs yuav ua tau zoo dua qub raws li kev siv technology ua tsaug rau kev txhim kho xws li graphene txias thiab hloov kho thermal daws teeb meem, ua kom lawv txoj hauj lwm ua lub teeb pom kev zoo rau yav tom ntej.
Paub txog cov lus qhia no ua rau cov tuam txhab thiab cov neeg siv LEDs tau zoo, lav kev ua haujlwm siab tshaj plaws hauv kev lag luam, kev lag luam, thiab chaw nyob.
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