Inselele enkulu yobuchwepheshe bezinto zokukhanyisa ze-LED okwamanje ukukhishwa kokushisa. Ukushisa okungekuhle kuholele ekunikezeni amandla kamshayeli we-LED kanye nama-electrolytic capacitor abe amaphutha okuthuthukiswa okuqhubekayo kwezinto ezikhanyayo ze-LED, kanye nesizathu sokuguga ngaphambi kwesikhathi kwemithombo yokukhanya ye-LED.
Kuhlelo lokukhanyisa kusetshenziswa umthombo wokukhanya we-LV LED, ngenxa yesimo sokusebenza somthombo wokukhanya we-LED ku-voltage ephansi (VF=3.2V) kanye namanje aphezulu (IF=300-700mA), ikhiqiza ukushisa okukhulu. Izakhiwo zokukhanyisa zendabuko zinendawo elinganiselwe, futhi kunzima kumasinki okushisa asendaweni encane ukuthi akhiphe ngokushesha ukushisa. Naphezu kokusebenzisa izixazululo ezihlukahlukene zokushisa ukushisa, imiphumela yayingagculisi futhi yaba inkinga engaxazululeki yokulungiswa kwezibani ze-LED. Sihlala silwela ukuthola izinto ezilula futhi ezisebenziseka kalula zokukhipha ukushisa ezine-conductivity enhle yokushisa kanye nezindleko eziphansi.
Njengamanje, lapho imithombo yokukhanya ye-LED ikhanya, cishe u-30% wamandla kagesi aguqulwa abe amandla okukhanya, bese amanye aguqulwa abe amandla okushisa. Ngakho-ke, ukuthumela amandla amaningi ashisayo ngokushesha ngangokunokwenzeka kuwubuchwepheshe obuyinhloko ekwakhiweni kwesakhiwo sezibani ze-LED. Amandla ashisayo adinga ukuhlakazwa ngokuqhutshwa kwe-thermal, i-convection, kanye nemisebe. Kuphela ngokuthumela ngaphandle ukushisa ngokushesha ngangokunokwenzeka izinga lokushisa lomgodi ngaphakathi kwesibani se-LED lingancishiswa ngokuphumelelayo, ukunikezwa kwamandla kungavikelwa ekusebenzeni endaweni enezinga lokushisa eliphezulu ende, kanye nokuguga ngaphambi kwesikhathi komthombo wokukhanya we-LED okubangelwa ukuphakama kwesikhathi eside. -ukusebenza kwezinga lokushisa kugwenywe.

Umzila wokukhipha ukushisa wezinto zokukhanyisa ze-LED
Ngenxa yokuthi imithombo yokukhanya ye-LED ngokwayo ayinayo imisebe ye-infrared noma i-ultraviolet, ayinawo umsebenzi wokukhipha ukushisa kwemisebe. Indlela yokukhipha ukushisa yezibani ze-LED ingathunyelwa kuphela ngosinki wokushisa ohlanganiswe eduze nebhodi lobuhlalu be-LED. I-radiator kufanele ibe nemisebenzi yokudlulisa ukushisa, i-heat convection, kanye nemisebe yokushisa.
Noma iyiphi irediyetha, ngaphandle kokukwazi ukudlulisa ngokushesha ukushisa ukusuka emthonjeni wokushisa kuya phezulu kurediyetha, incike ngokuyinhloko ekuguquleni nasemisebeni ukukhipha ukushisa emoyeni. I-thermal conduction ixazulula kuphela indlela yokudlulisa ukushisa, kuyilapho i-thermal convection iwumsebenzi oyinhloko wamasinki okushisa. Ukusebenza kokukhishwa kokushisa kunqunywa ikakhulukazi indawo yokulahla ukushisa, umumo, namandla okuhambisa kwemvelo, futhi imisebe eshisayo iwumsebenzi osizayo.
Ngokuvamile, uma ibanga elisuka emthonjeni wokushisa liye ebusweni besinki wokushisa lingaphansi kuka-5mm, inqobo nje uma ukuhanjiswa okushisayo kwempahla kungaphezu kuka-5, ukushisa kwawo kungathunyelwa kwamanye amazwe, kanti okunye ukushabalaliswa kokushisa kufanele. ukubuswa yi-convection eshisayo.
Imithombo eminingi yokukhanyisa ye-LED isasebenzisa ubuhlalu be-LED obunogesi ophansi (VF=3.2V) kanye nomthamo ophezulu wamanje (IF=200-700mA). Ngenxa yokushisa okuphezulu okukhiqizwa ngesikhathi sokusebenza, ama-alloys e-aluminium ane-conductivity ephezulu yokushisa kufanele asetshenziswe. Ngokuvamile kukhona ama-radiator e-aluminium e-die cast, ama-radiator e-aluminium extruded, nama-radiator e-aluminium anesitembu. Irediyetha ye-aluminium ye-Die cast ubuchwepheshe bezingxenye zokuphonswa kwengcindezi, lapho ingxubevange ye-aluminium ye-zinc yethusi ithululelwa ethekwini lokuphakela lomshini wokukhipha ukufa, bese ifa iphonswa umshini wokuphonsa umshini ukukhiqiza irediyetha enomumo ochaziwe. ngesikhunta esiklanywe ngaphambili.

Irediyetha ye-aluminium efayo
Izindleko zokukhiqiza ziyalawuleka, kodwa amaphiko okukhipha ukushisa angeke enziwe abe mncane, okwenza kube nzima ukwandisa indawo yokushisa ukushisa. Izinto ezisetshenziswa kakhulu zokusakaza nge-die-cast kumasinki okushisa amalambu e-LED yi-ADC10 ne-ADC12.

Irediyetha ye-aluminium ekhanyiwe
Ukukhama i-aluminium ewuketshezi ibe yisimo ngesikhunta esingaguquki, bese usika ibha ibe sesimweni esifiswayo sesinki wokushisa ngomshini, kungenisa izindleko eziphezulu zokucubungula ezigabeni zakamuva. Amaphiko okukhipha ukushisa angenziwa abe mncane kakhulu, ngokunwetshwa okuphezulu kwendawo yokushisa ukushisa. Lapho amaphiko okukhipha ukushisa esebenza, enza ngokuzenzakalelayo i-convection yomoya ukuze asakaze ukushisa, futhi umphumela wokukhipha ukushisa muhle. Izinto ezisetshenziswa kakhulu yi-AL6061 kanye ne-AL6063.

Irediyetha ye-aluminium enesitembu
Kufezwa ngokugxiviza nokudonsa amapuleti ensimbi ne-aluminium alloy ngemishini yokubhoboza kanye nezibunjwa ukuze kwakheke ama-radiator amise okwenkomishi. Ama-radiator anezitembu anemiphetho eshelelayo yangaphakathi nangaphandle, kodwa indawo elinganiselwe yokukhipha ukushisa ngenxa yokuntuleka kwamaphiko. Izinto ezisetshenziswa kakhulu ze-aluminium alloy ziyi-5052, 6061, ne-6063. Izingxenye zokugxiviza zinekhwalithi ephansi kanye nokusetshenziswa kwezinto eziphezulu, okwenza kube yisixazululo esingabizi kakhulu.
I-thermal conductivity yama-radiators e-aluminium alloy ilungile futhi ifanele ukushintshwa okukodwa kwamandla wamanje. Ukuze uthole amandla akhona angashintshiwe angahlukanisiwe, kuyadingeka ukwehlukanisa i-AC ne-DC, amandla kagesi aphezulu naphansi ngomklamo wesakhiwo wezinto zokukhanyisa ukuze kudlule isitifiketi se-CE noma se-UL.

I-radiator ye-aluminium ehlanganiswe ngepulasitiki
Iwusinki wokushisa onegobolondo lepulasitiki elibamba ukushisa kanye nomgogodla we-aluminium. Ipulasitiki ye-thermal conductive kanye ne-aluminium yokushisa ukushisa core ibunjwa ngesikhathi esisodwa emshinini wokubumba umjovo, futhi umgogodla wokulahla ukushisa kwe-aluminium usetshenziswa njengengxenye eshunyekiwe, edinga ukucutshungulwa komshini kusengaphambili. Ukushisa kobuhlalu be-LED kuqhutshwa ngokushesha kupulasitiki oshisayo oshisayo ngokusebenzisa umgogodla wokushisa we-aluminium. Ipulasitiki ye-thermal conductive isebenzisa amaphiko ayo amaningi ukwenza ukuchithwa kokushisa kwe-air convection futhi ikhiphe okunye ukushisa endaweni yayo.
Amaradiyetha e-aluminium asongwe ngepulasitiki ngokuvamile asebenzisa imibala yoqobo yepulasitiki eshisayo, emhlophe nemnyama. Amaradiyetha e-aluminium asongwe ngepulasitiki emnyama anemiphumela engcono yokushabalalisa ukushisa kwemisebe. Ipulasitiki ye-thermal conductive iwuhlobo lwempahla ye-thermoplastic okulula ukulolongwa ngokubumba umjovo ngenxa yobuningi bayo, ukuminyana, ukuqina, namandla. Inokumelana okuhle kakhulu nemijikelezo ye-thermal shock kanye nokusebenza okuhle kakhulu kokufakwa kwe-insulation. Amapulasitiki e-thermal conductive ane-coefficient ephezulu yemisebe kunempahla yensimbi evamile.
Ukuminyana kwepulasitiki esebenza nge-thermally kungaphansi ngo-40% kune-die cast aluminium kanye nezitsha zobumba. Kuma-radiators wesimo esifanayo, isisindo se-aluminium ehlanganiswe ngepulasitiki singancishiswa cishe ingxenye eyodwa kwezintathu; Uma kuqhathaniswa nawo wonke ama-radiator e-aluminium, inezindleko eziphansi zokucubungula, imijikelezo emifushane yokucubungula, kanye namazinga okushisa aphansi okucubungula; Umkhiqizo oqediwe awuntekenteke; Amakhasimende angahlinzeka ngemishini yawo yokubumba umjovo wokuklama ukubukeka okuhlukene kanye nokukhiqizwa kwezinto zokukhanyisa. Irediyetha ye-aluminium esongwe ngepulasitiki inokusebenza okuhle kokuhlukanisa futhi kulula ukuyidlula imithetho yezokuphepha.

I-radiator yepulasitiki ene-thermal conductivity ephezulu
Ama-radiators epulasitiki e-thermal conductivity aphezulu asethuthuke ngokushesha muva nje. Ama-radiator epulasitiki asebenzisa ukushisa okuphezulu awuhlobo lwazo zonke irediyetha yepulasitiki ene-thermal conductivity izikhathi eziphindwe kaningi kunepulasitiki evamile, efinyelela ku-2-9w/mk, futhi inekhono elihle kakhulu le-thermal conductivity namandla emisebe; Uhlobo olusha lwe-insulation kanye nezinto zokushisa ezingasetshenziswa ezibanini zamandla ahlukahlukene, futhi zingasetshenziswa kabanzi kumalambu e-LED ahlukahlukene asukela ku-1W kuya ku-200W.
Ipulasitiki ye-thermal conductivity ephezulu ingamelana ne-AC 6000V futhi ilungele ukusebenzisa ugesi ongahlukanisiwe ongaguquguquki wamanje kanye nokunikezwa kwamandla kagesi olayini aphezulu we-HVLED. Yenza lezi zibani ze-LED zibe lula ukudlula ukuhlolwa okuqinile kokuphepha okufana ne-CE, TUV, UL, njll. I-HVLED isebenza ku-voltage ephezulu (VF=35-280VDC) kanye nesimo samanje esiphansi (IF=20-60mA), esinciphisa ukushisa. ukukhiqizwa kwebhodi lobuhlalu be-HVLED. Ama-radiators epulasitiki e-thermal conductivity aphezulu angenziwa ngokusebenzisa ukubumba komjovo wendabuko noma imishini yokukhipha.
Uma usuwenziwe, umkhiqizo ophelile unokushelela okuphezulu. Ukuthuthukisa ngokuphawulekayo ukukhiqiza, ngokuguquguquka okuphezulu ekwakhiweni kwesitayela, okuvumela abaklami ukuthi basebenzise ngokugcwele imiqondo yabo yedizayini. Irediyetha yepulasitiki ene-thermal conductivity ephezulu yenziwe nge-PLA (corn starch) polymerization, eyonakala ngokuphelele, ayinazinsalela, futhi engenakho ukungcoliswa kwamakhemikhali. Inqubo yokukhiqiza ayinakho ukungcola kwensimbi esindayo, akukho ndle, futhi akukho gesi ephumayo, ehlangabezana nezidingo zemvelo zomhlaba wonke.
Ama-molecule e-PLA angaphakathi kosinki wokushisa oshisayo wepulasitiki oshisayo agcwele ama-ion ensimbi e-nanoscale, angahamba ngokushesha emazingeni okushisa aphezulu futhi andise amandla emisebe eshisayo. Ubungqabavu bayo bungaphezu kobemizimba yensimbi ekhipha ukushisa. I-thermal conductivity plastic heat sink imelana namazinga okushisa aphezulu futhi ayiphuki noma yonakale amahora amahlanu ku-150 ℃. Uma isetshenziswa ngesisombululo sedrayivu samanje esine-voltage ephezulu ye-IC, ayidingi ama-electrolytic capacitor noma ama-inductors evolumu enkulu, ithuthukisa kakhulu impilo yezibani ze-LED. Kuyisixazululo sokuphakelwa kukagesi esingasodwa esisebenza kahle kakhulu nezindleko eziphansi. Ikakhulukazi kulungele ukusetshenziswa kwamashubhu e-fluorescent kanye nezibani zezimayini ezinamandla amakhulu.
Ama-radiators epulasitiki ane-thermal conductivity ephezulu angaklanywa ngamaphiko amaningi anembile okuchitha ukushisa, angenziwa abe mncane kakhulu ukuze kwandiswe ukunwetshwa kwendawo yokukhipha ukushisa. Lapho amaphiko okukhipha ukushisa esebenza, enza ngokuzenzakalelayo ukuguquguquka komoya ukuze asakaze ukushisa, okuholela kumphumela ongcono wokuqeda ukushisa. Ukushisa kobuhlalu be-LED kudluliselwa ngokuqondile ophikweni lokukhipha ukushisa ngepulasitiki ephezulu ye-thermal conductivity, futhi kuhlakazwe ngokushesha nge-convection yomoya kanye nemisebe engaphezulu.
Ama-radiator epulasitiki asebenza ngokushisa okuphezulu anokuqina okukhanyayo kune-aluminium. Ukuminyana kwe-aluminium ngu-2700kg/m3, kanti ukuminyana kwepulasitiki kungu-1420kg/m3, okucishe kube uhhafu we-aluminium. Ngakho-ke, kuma-radiator of shape efanayo, isisindo sama-radiator epulasitiki singu-1/2 kuphela we-aluminium. Futhi ukucubungula kulula, futhi umjikelezo wayo wokubumba ungafinyezwa ngo-20-50%, obuye unciphise izindleko zamandla.