Yog vim li cas vim li cas LED teeb qhov chaw yog cua sov
PN hlws ris cua sov ntawm LED yog thawj zaug ua rau saum npoo ntawm wafer los ntawm wafer semiconductor khoom nws tus kheej, uas muaj qee yam thermal kuj. Los ntawm qhov kev xav ntawm LED tivthaiv, nyob ntawm seb cov qauv ntawm lub pob, kuj tseem muaj qhov thermal tsis kam ntawm ntau qhov sib txawv ntawm cov wafer thiab tus tuav. Qhov sib npaug ntawm ob qhov thermal resistances yog qhov thermal resistance Rj-a ntawm LED. Los ntawm tus neeg siv qhov kev xav, Rj-ib qho parameter ntawm ib qho LED tsis tuaj yeem hloov pauv. Qhov no yog ib qho teeb meem uas cov tuam txhab ntim LED yuav tsum tau kawm, tab sis nws muaj peev xwm txo tau tus nqi Rj-ib qho los ntawm kev xaiv cov khoom lossis cov qauv los ntawm cov tuam txhab sib txawv.
Hauv LED luminaires, txoj kev hloov hluav taws xob ntawm LED yog qhov nyuaj heev. Txoj kev tseem ceeb yog LED-PCB-heatsink-kua kua. Raws li tus tsim qauv ntawm luminaires, txoj haujlwm tseem ceeb yog txhawm rau txhim kho cov khoom siv luminaire thiab cov qauv cua sov kom txo tau cov khoom siv LED kom ntau li ntau tau. Thermal tsis kam ntawm cov kua.
Raws li cov cab kuj rau mounting hluav taws xob Cheebtsam, LED Cheebtsam yog tsuas yog txuas nrog lub rooj tsavxwm Circuit Court los ntawm soldering. Tag nrho cov thermal tsis kam ntawm cov hlau-raws li Circuit Court board yog me me. Feem ntau siv yog tooj liab substrates thiab aluminium substrates, thiab aluminium substrates yog tus nqi qis. Nws tau dav siv los ntawm kev lag luam. Lub thermal kuj ntawm aluminium substrate nws txawv nyob ntawm seb tus txheej txheem ntawm txawv manufacturers. Qhov kwv yees thermal kuj yog 0.6-4.0 ° C / W, thiab tus nqi sib txawv kuj loj. Aluminium substrate feem ntau muaj peb lub cev txheej, txheej thaiv, txheej txheej insulating, thiab txheej txheej substrate. Cov hluav taws xob conductivity ntawm cov khoom siv hluav taws xob hluav taws xob feem ntau kuj tsis zoo, yog li cov thermal kuj feem ntau yog los ntawm cov txheej txheem insulating, thiab cov ntaub ntawv insulating siv sib txawv heev. Ntawm lawv, ceramic-based insulating nruab nrab muaj qhov tsawg tshaj plaws thermal kuj. Ib qho pheej yig aluminium substrate feem ntau yog iav fiber insulating txheej los yog ib txheej resin insulating txheej. Lub thermal kuj tseem muaj feem xyuam rau lub thickness ntawm rwb thaiv tsev txheej.
Nyob rau hauv cov xwm txheej ntawm tus nqi thiab kev ua tau zoo, aluminium substrate hom thiab aluminium substrate cheeb tsam yog tsim nyog xaiv. Nyob rau hauv sib piv, qhov tseeb tsim ntawm lub dab dej kub zoo thiab qhov zoo tshaj plaws kev twb kev txuas ntawm lub dab dej kub thiab aluminium substrate yog tus yuam sij rau txoj kev vam meej ntawm lub luminaire tsim. Qhov tseem ceeb tshaj plaws hauv kev txiav txim siab ntawm cov cua kub dissipation yog qhov chaw sib cuag ntawm lub dab dej kub nrog cov kua dej thiab cov kua dej ntws. General LED teeb yog passively dissipated los ntawm tej yam ntuj tso convection, thiab thermal tawg kuj yog ib tug ntawm cov tseem ceeb txoj kev ntawm tshav kub dissipation.
Yog li ntawd, peb tuaj yeem txheeb xyuas qhov laj thawj ntawm qhov tsis ua haujlwm ntawm LED teeb kom tawg cua sov:
1. Lub teeb ci LED muaj qhov thermal loj, thiab lub teeb ci tsis dissipate. Kev siv cov thermal paste yuav ua rau lub tshav kub dissipation txav tsis tau.
2.Lub aluminium substrate yog siv los ua PCB kev sib txuas lub teeb ci. Txij li thaum aluminium substrate muaj ntau yam thermal resistances, lub tshav kub qhov chaw ntawm lub teeb yuav kis tsis tau, thiab kev siv cov thermal conductive muab tshuaj txhuam yuav ua rau lub tshav kub dissipation suab tsis ua hauj lwm.
3.Tsis muaj qhov chaw rau thermal buffering ntawm lub teeb-emitting nto, uas yuav ua rau lub tshav kub dissipation ntawm LED teeb qhov chaw tsis ua hauj lwm, thiab lub teeb lwj yog siab heev. Peb qhov laj thawj saum toj no yog qhov laj thawj tseem ceeb rau qhov tsis ua haujlwm ntawm LED teeb pom kev zoo hauv kev lag luam, thiab tsis muaj kev daws teeb meem ntau dua. Qee lub tuam txhab loj siv cov ceramic substrate dissipate lub teeb hlaws pob, tab sis lawv tsis tuaj yeem siv dav vim yog tus nqi siab.
Yog li ntawd, qee qhov kev txhim kho tau raug npaj:
1. Qhov saum npoo roughening ntawm lub dab dej kub ntawm lub teeb LED yog ib txoj hauv kev los txhim kho lub peev xwm ntawm cov cua sov.
Deg roughening txhais tau hais tias tsis siv qhov chaw du, uas tuaj yeem ua tiav los ntawm kev siv lub cev thiab tshuaj. Feem ntau, nws yog ib txoj kev ntawm xuab zeb blasting thiab oxidation. Xim kuj yog ib txoj kev tshuaj, uas tuaj yeem ua tiav ua ke nrog oxidation. Thaum tsim cov cuab yeej sib tsoo profile, nws muaj peev xwm ntxiv qee qhov ribs rau saum npoo kom nce qhov chaw saum npoo los txhim kho cov cua kub dissipation muaj peev xwm ntawm LED teeb.
2. Ib txoj hauv kev los ua kom muaj peev xwm ntawm cov hluav taws xob hluav taws xob ntau dua yog siv cov xim dub los kho.