Impamvu ituma urumuri rwa LED rushyuha
Ubushyuhe bwa PN bushyushya LED bukorwa bwa mbere hejuru ya wafer nibikoresho bya semiconductor ubwabyo, bifite imbaraga zo kurwanya ubushyuhe. Urebye ibice bya LED, ukurikije imiterere ya paki, hariho nubushyuhe bwumuriro bwubunini butandukanye hagati ya wafer na nyirayo. Igiteranyo cyibi byombi birwanya ubushyuhe bugizwe nubushyuhe bwa Rj-a ya LED. Ukurikije uko ukoresha abibona, Rj-ibipimo bya LED yihariye ntishobora guhinduka. Iki nikibazo ibigo bipakira LED bigomba kwiga, ariko birashoboka kugabanya Rj-agaciro muguhitamo ibicuruzwa cyangwa moderi mubakora ibicuruzwa bitandukanye.
Muri LED luminaire, inzira yo kohereza ubushyuhe bwa LED iragoye cyane. Inzira nyamukuru ni LED-PCB-heatsink-fluid. Nkumushushanya wa luminaire, umurimo usobanutse rwose nukuzamura ibikoresho bya luminaire hamwe nubushyuhe bwo gukwirakwiza ubushyuhe kugirango ugabanye ibice bya LED bishoboka. Kurwanya ubushyuhe hagati yamazi.
Nkumutwara wo gushiraho ibikoresho bya elegitoronike, ibice bya LED bihujwe cyane cyane nu kibaho cyumuzunguruko. Muri rusange ubushyuhe bwumuriro bwicyuma gishingiye kumuzunguruko ni gito. Bikunze gukoreshwa ni insimburangingo z'umuringa na aluminiyumu, kandi aluminium substrate iri hasi cyane kubiciro. Yemejwe cyane ninganda. Kurwanya ubushyuhe bwa aluminium substrate biratandukanye bitewe nibikorwa byabakora ibintu bitandukanye. Ikigereranyo cyumuriro ugereranije ni 0,6-4.0 ° C / W, kandi itandukaniro ryibiciro ni rinini. Ububiko bwa aluminiyumu muri rusange bufite ibice bitatu bifatika, umurongo wiring, urwego rukingira, hamwe nubutaka. Umuyagankuba wibikoresho rusange bikoresha amashanyarazi nabyo birakennye cyane, kubwibyo kurwanya ubushyuhe ahanini biva murwego rwo kubika, kandi ibikoresho byifashishwa biratandukanye. Muri byo, uburyo bwa ceramic bushingiye kumashanyarazi bugira imbaraga nkeya zirwanya ubushyuhe. Ikigereranyo cya aluminiyumu ihendutse muri rusange ni ikirahuri cya fibre ikingira ikirahure cyangwa resin izigama. Kurwanya amashyuza nabyo bifitanye isano neza nubunini bwurwego.
Mubihe byigiciro nigikorwa, ubwoko bwa aluminium substrate hamwe na aluminiyumu yubutaka byatoranijwe neza. Ibinyuranye, igishushanyo mbonera cyimiterere yubushyuhe nubusabane bwiza hagati yubushyuhe na substrate ya aluminium nurufunguzo rwo gutsinda kwa luminaire. Ikintu nyacyo cyo kumenya ingano yubushyuhe ni ahantu hahurira nubushyuhe bwamazi hamwe nigipimo cyamazi. Amatara rusange ya LED akwirakwizwa byimazeyo na convection naturel, kandi imirasire yumuriro nayo ni bumwe muburyo bwingenzi bwo gukwirakwiza ubushyuhe.
Kubwibyo, turashobora gusesengura impamvu zananiwe gucana amatara ya LED kugirango akwirakwize ubushyuhe:
1. Inkomoko yumucyo LED ifite imbaraga nini zo kurwanya ubushyuhe, kandi isoko yumucyo ntisohoka. Gukoresha paste yumuriro bizatera ubushyuhe bwo kugabanuka kunanirwa.
2.Ibikoresho bya aluminiyumu bikoreshwa nka PCB ihuza urumuri. Kubera ko substrate ya aluminiyumu ifite imbaraga nyinshi zo kurwanya ubushyuhe, isoko yubushyuhe bwumucyo ntishobora kwanduzwa, kandi gukoresha paste yumuriro wumuriro birashobora gutuma ubushyuhe bwo kugabanuka butananirwa.
3.Nta mwanya uhari wo gukwirakwiza ubushyuhe bwubuso butanga urumuri, bizatera ubushyuhe bwo gukwirakwiza isoko yumucyo wa LED kunanirwa, kandi kwangirika kwumucyo biratera imbere. Impamvu eshatu zavuzwe haruguru nimpamvu nyamukuru zitera kunanirwa ibikoresho byo kumurika LED mu nganda, kandi nta gisubizo kiboneye. Amasosiyete manini amwe akoresha ceramic substrate kugirango akwirakwize ipaki yamatara, ariko ntashobora gukoreshwa cyane kubera igiciro kinini.
Kubwibyo, hari ibyifuzo byanonosowe:
1. Ubuso bugaragara hejuru yubushyuhe bwamatara ya LED nimwe muburyo bwo kuzamura neza ubushobozi bwo gukwirakwiza ubushyuhe.
Ubuso bwo hejuru busobanura ko nta buso bunoze bukoreshwa, bushobora kugerwaho nuburyo bwumubiri nubumashini. Mubisanzwe, nuburyo bwo guturika umucanga na okiside. Guhindura amabara nuburyo bwimiti, bushobora kurangizwa hamwe na okiside. Mugushushanya igikoresho cyo gusya umwirondoro, birashoboka kongeramo imbavu hejuru kugirango wongere ubuso kugirango wongere ubushobozi bwo gukwirakwiza ubushyuhe bwitara rya LED.
2. Inzira isanzwe yo kongera ubushobozi bwimirasire yubushyuhe ni ugukoresha ibara ryirabura ryirabura.