LED thermal kev sib tw thiab kev daws teeb meem

Tam sim no, lub ntsiab cua kub dissipation technologies ntawm high-power LED teeb muaj xws li kub dab dej, tshav kub yeeb nkab, vapor chamber, hluav taws xob txheej, thermal grease, tshav kub hloov gasket, thiab lwm yam. Lub dab dej kub siv qhov nthuav dav cheeb tsam kom dissipate tshav kub convection rau lub ib puag ncig. Cov yam ntxwv cuam tshuam rau kev ua haujlwm txias ntawm lub dab dej kub muaj xws li cov duab ntawm lub dab dej kub, tus naj npawb, qhov sib txawv, qhov loj, lub kaum sab xis ntawm lub fin, cov khoom siv thiab kev siv tshuab ntawm lub dab dej kub, uas yog qhov feem ntau siv thaum tshav kub kub dissipation. tshuab. Cov qauv teeb nyob rau hauv daim ntawv no siv lub dab dej kub kom dissipate cua sov.

Cov yeeb nkab cua sov siv lub voj voog hloov ntawm condensate theem kom xa tawm thiab dissipate lub siab kub tawm los ntawm LED. Feem ntau, qhov txias kawg ntawm cov yeeb nkab cua sov yog siv ua ke nrog lub dab dej kub kom ua tau zoo dua cov cua kub dissipation.

Lub hauv paus ntsiab lus ntawm lub vapor chamber zoo ib yam li cov yeeb nkab cua sov, tshwj tsis yog tias cov yeeb nkab cua sov yog ib-dimensional thiab unidirectional hloov hluav taws xob, thaum qhov kub ntawm qhov sib npaug ntawm cov phaj yog qhov hloov pauv kub thiab muaj ob-dimensional yam ntxwv, kom qhov kub thiab txias. ntawm tag nrho cov radiator yog uniform.

Radiation txheej yog siv cov cua sov dissipation txheej rau sab nrauv ntawm lub tshuab hluav taws xob los txhim kho cov emissivity thiab ua kom cov cua sov ua kom zoo dua. Lub hom phiaj ntawm tshav kub conductive muab tshuaj txhuam thiab tshav kub conductive gasket yog los txo qhov kev sib cuag thermal kuj.

Thermal challenge ntawm LED:

1. Yog hais tias qhov kev npaj ntawm tshav kub dissipation fins tsis coj mus rau hauv tus account siv hom ntawm cov teeb, nws cuam tshuam rau lub tshav kub dissipation nyhuv ntawm tshav kub dissipation fins. Thaum tshav kub kub dissipation fins nyob rau hauv txoj kab nrog cov yam ntxwv ntawm cov khoom yuav tsum tau tsim.

2. LED thermal tsim overemphasizes tshav kub conduction txuas, tab sis ignores lub convection tshav kub dissipation txuas. Thaum tshav kub kub yeeb nkab, tshav kub conductive silicone roj thiab lwm yam cua kub dissipation ntsuas txo cov thermal kuj los ntawm tshav kub conduction, tab sis qhov kawg ntawm tshav kub nyob rau hauv lub cheeb tsam ntawm lub teeb, yog li txheej txheej hluav taws xob txheej ntawm txheej txheej yog ib qho kev txhim kho.

3. LED ntaus ntawv tsis quav ntsej qhov sib npaug ntawm kev hloov hluav taws xob. Yog tias qhov ntsuas kub ntawm cov fins tsis sib xws, qee qhov ntawm cov fins yuav tsis ua lub luag haujlwm lossis muaj lub luag haujlwm txwv. Lub vapor chamber tuaj yeem sib npaug ntawm qhov kub thiab txias.

4. Txoj hauv kev zoo tshaj plaws kom txias cov teeb yog nrhiav qhov luv tshaj plaws tshav kub dissipation channel kom tso cov cua sov mus rau hauv qhov chaw kom sai li sai tau. Ntawm lawv, lub interfacial thermal kuj yog lub bottleneck ntawm lub tshav kub dissipation channel, yog li ntawd lub tsom xam ntawm tshav kub dissipation yuav tsum kuj nyob rau hauv lub interfacial tshav kub conduction khoom.