Dalilin da yasa tushen hasken LED ya yi zafi
PN junction dumama LED da aka fara gudanar zuwa saman wafer da wafer semiconductor abu da kanta, wanda yana da wani thermal juriya. Daga hangen nesa na bangaren LED, dangane da tsarin kunshin, akwai kuma juriya na thermal masu girma dabam tsakanin wafer da mai riƙewa. Jimlar waɗannan juriya na thermal guda biyu sun ƙunshi juriya na thermal Rj-a na LED. Daga ra'ayi na mai amfani, Rj-a siga na takamaiman LED ba za a iya canza ba. Wannan matsala ce da kamfanonin marufi na LED ke buƙatar yin nazari, amma yana yiwuwa a rage ƙimar Rj-a ta zaɓin samfura ko ƙira daga masana'antun daban-daban.
A cikin luminaires LED, hanyar canja wurin zafi na LED yana da rikitarwa. Babban hanyar ita ce LED-PCB-heatsink-fluid. A matsayin mai zane na luminaires, aikin da ke da ma'ana na gaske shine don inganta kayan aiki mai haske da tsarin watsar da zafi don rage abubuwan LED kamar yadda zai yiwu. Juriya na thermal tsakanin ruwaye.
A matsayin mai ɗaukar kayan aikin lantarki, abubuwan LED sun fi haɗawa da allon kewayawa ta hanyar siyarwa. Gabaɗayan juriyar zafi na allon da'ira na tushen ƙarfe kaɗan ne. Yawanci ana amfani da su ana amfani da su ne na jan karfe da na aluminium, kuma na'urorin aluminium suna da ƙarancin farashi. Masana'antu sun karbe shi sosai. Juriya na thermal na aluminum substrate ya bambanta dangane da tsarin masana'antun daban-daban. Matsakaicin juriya na thermal shine 0.6-4.0 ° C / W, kuma bambancin farashin yana da girma. Tsarin aluminum gabaɗaya yana da yadudduka na zahiri guda uku, Layer wiring, Layer insulating, da Layer Layer. Ƙarfin wutar lantarki na kayan rufewa na lantarki na gabaɗaya shima ba shi da kyau sosai, don haka juriya na thermal galibi yana fitowa ne daga insulating Layer, kuma kayan da ake amfani da su sun bambanta sosai. Daga cikin su, matsakaicin insulating na tushen yumbu yana da ƙaramin juriya na thermal. Aluminum mai rahusa mai ƙarancin tsada gabaɗaya shine gilashin fiber insulating Layer ko Layer insulating resin. Har ila yau, juriya na thermal yana da dangantaka da kauri na rufin rufi.
A ƙarƙashin yanayin farashi da aiki, nau'in ƙirar aluminum da yanki na aluminum an zaɓi su da kyau. Sabanin haka, daidaitaccen tsari na yanayin zafi mai zafi da kuma mafi kyawun haɗin kai tsakanin zafi mai zafi da aluminum substrate shine mabuɗin nasara na ƙirar haske. Haƙiƙanin abin da ke ƙayyade adadin zafi mai zafi shine wurin hulɗar zafin jiki tare da ruwa da kuma yawan ruwa. Gabaɗaya fitilun LED ana tarwatsewa ta hanyar convection na halitta, kuma hasken zafi shima yana ɗaya daga cikin manyan hanyoyin watsar da zafi.
Saboda haka, zamu iya nazarin dalilan rashin nasarar fitilun LED don watsar da zafi:
1. Hasken haske na LED yana da babban juriya na thermal, kuma hasken haske ba ya ɓacewa. Yin amfani da manna na thermal zai sa motsin zafi ya gaza.
2.The aluminum substrate ake amfani da PCB dangane haske tushen. Tunda madaidaicin aluminium yana da juriya mai yawa na thermal, ba za a iya watsa tushen zafi na tushen hasken ba, kuma amfani da manna mai ɗaukar zafi na iya haifar da motsin watsawar zafi ya gaza.
3.There babu sarari ga thermal buffering na haske-emitting surface, wanda zai haifar da zafi dissipation na LED haske tushen kasa, da kuma haske lalata ya ci gaba. Dalilai guda uku da ke sama sune manyan dalilan da ke haifar da gazawar kayan aikin hasken LED a cikin masana'antar, kuma babu sauran cikakken bayani. Wasu manyan kamfanoni suna amfani da yumbura don watsar da kunshin katakon fitila, amma ba za a iya amfani da su ba saboda tsadar farashin.
Saboda haka, an ba da shawarar wasu ingantawa:
1. Ƙaƙƙarfan yanayin zafi na fitilun LED yana daya daga cikin hanyoyin da za a iya inganta haɓakar zafi mai kyau.
Ragewar saman yana nufin cewa ba a amfani da ƙasa mai santsi, wanda za'a iya samu ta hanyoyin jiki da na sinadarai. Gabaɗaya, hanya ce ta fashewar yashi da oxidation. Launi kuma hanya ce ta sinadarai, wacce za'a iya gamawa tare da oxidation. Lokacin zayyana kayan aikin niƙa na bayanin martaba, yana yiwuwa a ƙara wasu haƙarƙari zuwa saman don ƙara yawan sararin samaniya don haɓaka ƙarfin zafi na fitilar LED.
2. Hanya ta gama gari don ƙara ƙarfin zafin zafi shine amfani da maganin saman baƙar fata.