Taw qhia
Thaum tshav kub kub dab dej-feem ntau yog ua los ntawm txhuas lossis tooj liab- rub cov cua sov kom deb ntawm cov khoom siv hluav taws xob thiab thawb nws mus rau hauv huab cua puag ncig lawv. Koj yuav pom lawv txhua qhov chaw: hauv computers, teeb pom kev zoo, cov khoom siv hluav taws xob, koj lub npe. Txhawm rau pab lawv nyob ntev dua thiab ua haujlwm zoo dua, cov tuam txhab feem ntau kho lawv qhov chaw. Cov khoom zoo li anodizing, hlau plating, lossis cov txheej tshwj xeeb tsis yog thaiv cov fins los ntawm xeb; nws kuj pab kom lawv tso cov cua sov kom zoo dua. Txhua qhov kev kho mob tuaj nrog nws cov txheej txheem ntawm qhov zoo thiab qhov tsis zoo. Qee qhov txhawb nqa kev ua haujlwm thermal, qee qhov tawm tsam corrosion, thiab qee qhov tsuas yog txo cov nqi. Cia peb ua tib zoo saib ntawm anodizing, plating, thiab coatings ntawm cov dab dej kub thiab saib yuav ua li cas ib tug stacks thaum nws los txog rau efficiency, kev tiv thaiv, thiab nqi.
Anodizing Heat Sinks: Emissivity thiab Durability
Anodizing yog ib qho kev mus- los ua cov txheej txheem rau kev ua cov khoom siv hluav taws xob txhuas kom tawv dua thiab ntev dua - kav ntev. Nov yog nws ua haujlwm li cas: koj khiav hluav taws xob tam sim no los ntawm cov hlau, uas ua rau nws cov txheej txheem oxide tuab rau hauv lub plhaub tawv, ntxeem tau. Lub plhaub no ua ntau heev. Nws ua kom lub dab dej kub muaj kev ruaj ntseg los ntawm corrosion thiab hnav- yog li nws yuav tiv thaiv tej yam xws li ya raws los yog cua ntsev zoo dua li cov txhuas dawb. Koj kuj tau txais cov hluav taws xob zoo hluav taws xob tawm ntawm qhov kev txiav txim, yog li tsis tshua muaj kev pheej hmoo ntawm hluav taws xob luv luv thaum koj cov khoom ntim tau nruj.
Tab sis cov khawv koob tiag tiag, yam tsawg kawg rau qhov txias, tshwm sim nrog qhov chaw emissivity. Bare aluminium NW nyuam qhuav radiates tshav kub. Nws emissivity nyob ib ncig ntawm 0.04 txog 0.06, uas txhais tau hais tias nws feem ntau tsuas yog thaws rov qab los ntawm kev cia nws khiav. Thaum koj anodize nws, txawm li cas los xij, tus lej ntawd dhia mus rau 0.8 lossis txawm tias 0.9. Qhov ntawd yog ib qho kev dhia loj heev-dam ntawd, lub dab dej kub anodized dub tuaj yeem ua kom muaj cua sov 15 mus rau 20 npaug ntau dua li ib qho yooj yim. Qhov no yog qhov loj heev yog tias koj tab tom cuam tshuam nrog kev ua kom txias lossis cov xwm txheej uas airflow txwv. Cov kws tshaj lij hais tias dub anodized cua sov dab dej tuaj yeem txhawb cov cua txias los ntawm 8 mus rau 10 npaug piv rau liab qab txhuas, thiab qhov ntawd txhais tau hais tias qhov chaw txias dua, tshwj xeeb tshaj yog nyob rau hauv me me los yog cramped setups.
Tam sim no, txheej anodized nws tus kheej yog nyias- feem ntau tsuas yog 5 mus rau 25 microns rau cov khoom txheem- yog li nws tsis tshua muaj cua sov ntws los ntawm cov hlau. Koj tau txais me ntsis ntxiv thermal kuj, tej zaum 5-10% ntau dua, tab sis lub pob hauv emissivity ntau dua li ua rau nws. Yog tias koj mus dhau lub nkoj thiab siv super-tuab "nyuaj anodizing" (25-100 microns), ces yog, koj yuav pib pom lub dab dej kub dua vim tias txheej thaiv cov cua sov me ntsis ntxiv. Tab sis raws li ib txwm muaj, kev lag luam tawm - tawm yog me me thiab feem ntau tsim nyog nws.
Muaj ntau yam nyiam txog anodizing. Cov txheej txheem raug sim-thiab- muaj tseeb, ua haujlwm ntawm qhov ntsuas, thiab feem ntau tsis tshua kim dua li cov txheej txheem tshwj xeeb. Tsis tas li ntawd, qhov ntxeem tau nto yuav siv cov xim zoo, yog li koj tuaj yeem tau txais cov dab dej kub hauv txhua hom xim yam tsis muaj kev cuam tshuam nrog lawv lub zog txias. Kev tshawb fawb qhia tau hais tias cov xim tiag tiag tsis muaj teeb meem rau cov hluav taws xob thermal- ib qho ntshiab anodized tiav txias thiab dub.
Cov kab hauv qab: anodized heat sinks yog qhov nyiam vim li cas. Lawv tiv taus corrosion, radiate tshav kub zoo li champs, thiab saib zoo ua nws. Qhov tsuas yog downside yog me ntsis poob rau hauv thermal conduction yog tias cov oxide txheej tau tuab heev, tab sis nrog cov qauv anodizing, qhov ntawd tsis yog qhov loj. Koj tau txais kev sib npaug ntse ntawm kev tiv thaiv thiab kev ua haujlwm.
Plating Heat Sinks: Kev coj ua thiab kev tiv thaiv
Plating lub dab dej kub txhais tau tias ntxiv cov txheej hlau nyias -nickel, tin, nyiaj, lossis qee zaum kub- sab xis rau saum npoo. Cov neeg feem ntau ua qhov no nrog tooj liab lossis hlau dab dej, thiab qee zaum nrog txhuas, txawm hais tias yuav siv lub tsho tshwj xeeb. Qhov laj thawj loj rau plating? Kev tiv thaiv corrosion. Piv txwv li, muab npib tsib xee los yog tin hla tooj liab nres nws ntawm oxidizing thiab corroding, uas yuav pab tau lub dab dej kub ua hauj lwm zoo nyob rau hauv ib puag ncig ntub los yog tawv. Yeej, cov txheej hlau ua haujlwm zoo li daim ntaub thaiv, ua kom huab cua thiab noo noo tawm thiab ua rau lub sijhawm ntev.
Plated txheej, tsis zoo li cov anodized, tseem ua ob qho tib si cua sov thiab hluav taws xob. Electroless npib tsib xee plating sawv tawm vim nws tawv tiv thaiv corrosion thiab tseem ua cua sov. Ib txheej npib tsib xee muaj cov thermal conductivity txog li 90 W/m·K- tsawg dua tooj liab (li 400 W/m·K) lossis txhuas (li 200 W/m·K)-tab sis nws tseem ua haujlwm. Ib tus kws tshaj lij kev lag luam txawm hais tias, "electroless npib tsib xee yog txheej txheej zoo tshaj plaws yog tias koj xav tau kev hloov pauv siab tshaj plaws," thiab cov nickel plating nyob twj ywm conductive, thermally thiab hluav taws xob. Silver plating mus ntau dua (nyob ib ncig ntawm 429 W / m·K) thiab pom nyob rau hauv siab heev -kev ua tau zoo iav, txawm hais tias nws ua tarnish dhau sijhawm. Kub plating (318 W / m·K) feem ntau tig mus rau hauv aerospace lossis RF daim ntaub ntawv uas qhov kev ruaj ntseg tseem ceeb tshaj plaws.
Feem ntau plating tsuas yog ob peb microns tuab, yog li nws NW nyuam qhuav ntxiv cov thermal kuj. Rau npib tsib xee, qhov kev tiv thaiv ntxiv yog li 0.2 K·cm² / W- yog li me me nws tsis muaj teeb meem rau feem ntau cov qauv. Tsis zoo li cov xim, hlau plating hardly insulates, txij li cov hlau nws tus kheej nqa kub zoo. Tseem, plating tsis pheej yig. Tus nqi nyob ntawm cov hlau: tin thiab nickel tsis phem, tab sis nyiaj thiab kub tuaj yeem tau txais pricey sai. Tsis tas li ntawd, plating aluminium tsis yooj yim -koj xav tau cov kauj ruam tu ntxiv lossis txheej txheej tshwj xeeb, uas ntxiv rau qhov hassle.
Cov kab hauv qab: plating cov dab dej kub ua rau koj cov khoom tiv thaiv corrosion yam tsis muaj kev cuam tshuam txog kev ua cua sov. Qhov no yog tshwj xeeb tshaj yog rau tooj liab dab dej (vim tooj liab hlub corrode) thiab nyob qhov twg koj xav tau ib tug ci iab, huv si tiav, zoo li connectors. Kev lag luam - tawm? Tus nqi siab dua thiab, qee zaum, teeb meem galvanic corrosion-zoo li yog tias nyias nickel ntawm txhuas tau khawb. Tab sis rau siab - txoj haujlwm kev ntseeg siab, feem ntau nws tsim nyog. Ib tug zoo npib tsib xee los yog tin phaj ua kom lub dab dej kub ua haujlwm rau lub sijhawm ntev.
Thaum tshav kub kub Sinks nrog ntau hom deg tiav
Txheej rau Heat Sinks: Aesthetic thiab Insulative Finishes
Thaum tshav kub kub coatings feem ntau txhais tau hais tias cov xim, hmoov coats, los yog cov ntaub ntawv polymer uas tau npuaj tom qab lub dab dej kub ua. Cov khaubncaws sab nraud povtseg no ntau dua li anodizing -xav tias 30 mus rau 100 microns- thiab ua ncaj ncees, lawv nyob ntawd los tiv thaiv ib feem lossis ua kom nws zoo nkauj, tsis pab kom txias zoo dua. Nyob rau hauv qhov tseeb, lub txheej hloov mus rau hauv ib tug tiag tiag thermal roadblock. Ib tus kws tsim hluav taws xob ua hluav taws xob tso rau nws bluntly: "Tsis txhob pleev xim rau cov dab dej kub." Xim tawm ib daim nyias nyias, insulating zaj duab xis uas slows down tshav kub hloov. Txawm tias lub tsho dub matte, uas qee tus neeg xav tias yuav pab tau, ua rau kev ua haujlwm qis me ntsis. Nws tsis tshua muaj thermal conductivity thiab thickness cia li mus rau hauv txoj kev.
Tam sim no, muaj qhov twist. Cov coatings ua rau lub ntsej muag emissivity. Ib qho xim dub zoo tuaj yeem muaj qhov emissivity ntawm 0.4 thiab 0.8, zoo dua li cov hlau ci. Yog li, yog, pleev xim rau lub dab dej kub radiates cua sov ntau dua. Tab sis ntawm no yog qhov ntes: qhov kev txhawb nqa tsis tshua muaj rau qhov tseeb tias cov txheej thaiv cov cua sov ntws los ntawm cov hlau nws tus kheej. Cov ntaub ntawv los ntawm ProtoLabs qhia tias cov hmoov txheej tuaj yeem txo qhov kev ua haujlwm thermal los ntawm 20 mus rau 50 feem pua hauv siab - lub zog cua sov dab dej. Yog li, cov xim pleev xim rau qhov kawg ua kom kub dua, tshwj xeeb tshaj yog thaum cov khoom khaus. Qee lub tuam txhab muab cov xim "thermal dissipative", tab sis raws li ib tus kws tshaj lij tau taw qhia, cov hlau liab qab yeej ntaus coated qhov chaw thaum qhov kub sib txawv tsis loj.
Muaj lwm hom txheej txheej - hloov pauv txheej xws li chromate lossis phosphate. Cov no yog ib zaj dab neeg txawv. Lawv yog super nyias, tsuas yog ib feem ntawm ib tug micron, thiab daim ntawv cog lus txoj cai rau cov hlau. Lawv NW nyuam qhuav kov hloov tshav kub tab sis pab pleev xim thiab ntxiv me ntsis kev tiv thaiv corrosion.
Cov kab hauv qab: tib neeg siv cov txheej txheem polymer ntawm cov dab dej kub kom zoo nkauj lossis hluav taws xob rwb thaiv tsev, tsis yog kom txias dua. Lawv ua rau qhov zoo li ntse thiab pab kom tsis txhob khawb lossis hluav taws xob luv, tab sis ib txwm muaj me me rau kev ua haujlwm thermal. Hauv qis- lub zog LED teeb pom kev zoo lossis cov khoom siv rau cov neeg siv khoom uas zoo li teeb meem, lub tsho dub lossis dawb hmoov feem ntau zoo. Tab sis thaum nws los txog rau qib siab - cov khoom ua tau zoo, cov kws ua haujlwm tswj xyuas cov xim tuab ntawm cov dab dej kub tseem ceeb.
Kev sib piv kev ua tau zoo thiab kev ua tau zoo
Yog li, yuav ua li cas cov kev kho mob no tau sib sau ua ke thaum nws tawm los tshem tawm cua sov? Nws yeej nqis los rau hauv txoj kev uas koj txias khoom. Yog tias koj tso siab rau kev ua kom txias txias- tsis muaj kiv cua, tsuas yog cov huab cua zoo qub qub xwb - txhawb nqa emissivity ua qhov sib txawv loj. Qhov ntawd yog qhov twg dub anodizing los yog coatings tshwj xeeb ci, cia thiab figuratively. Lawv cia lub dab dej kub tso tawm ntau dua los ntawm hluav taws xob. Siv lub dab dej kub me me: yog tias koj dub anodize nws, koj tuaj yeem tsoo nws qhov kub ntawm 10-20%, tsuas yog cia nws tawg zoo dua.
Tab sis thaum koj coj tus kiv cua thiab hloov mus rau yuam- cua txias, convection yuav dhau mus. Tam sim ntawd, qhov zoo nkauj siab - emissivity txheej tsuas yog pab me ntsis - tsuas yog ob peb feem pua kev txhim kho, tsis muaj dab tsi txaus ntshai.
Tam sim no, ua li cas txog cov hlau plated? Nickel{0}}plated dab dej, piv txwv li, tseem ua cua sov yuav luag zoo li liab qab txhuas. Ib tug engineer txawm muab nws zoo nkauj bluntly: anodized coatings tsuas yog tsis txav cua sov li zoo li hlau plating. Uas tau hais tias, txheej nyias nyias nyias nyias - tsuas yog ob peb microns tuab - tsis tshua nkag mus rau hauv txoj kev ntawm kev coj ua. Daim duab loj dua: anodized los yog pleev xim rau cov dab dej kub yog txhua yam hais txog hluav taws xob cua sov, thaum plated sawv daws tsom rau kev coj nws thiab tiv thaiv corrosion.
Los xam nws: dub anodized dab dej yog champs ntawm radiating tshav kub-qee zaum mus txog 8-10 npaug zoo dua li liab qab hlau. Plating, ntawm qhov tod tes, ua kom lub ntsej muag zoo ib yam li cov hlau nyoos. Cov neeg tsim qauv feem ntau pom anodizing yog qhov kev xaiv zoo tshaj plaws rau kev ua kom txias txias. Tab sis yog tias koj txhawj xeeb txog xeb lossis ntev - lub sij hawm hnav, plating yuav siv sij hawm ua ntej. Hauv cov tshuab nrog cov kiv cua lossis cov cua txias sib xyaw, qhov sib txawv me dua. Qhov tseeb, nrog kiv cua- cov dab dej txias, cov xim dub tuab yuav poob qis los ntawm ob peb degrees piv rau liab qab txhuas. Nickel plating? Koj yuav tsis tshua pom qhov kub hloov pauv txhua.
Corrosion Resistance thiab Durability
Kev tiv thaiv lub dab dej kub ntawm qhov chaw ntawm corrosion yeej tseem ceeb. Siv anodizing, piv txwv li- nws tsim ib qho tawv, ceramic- zoo li txheej txheej ntawm aluminium. Cov txheej ntawd ua rau huab cua thiab tshuaj lom neeg, yog li cov dab dej anodized sawv ntsug rau qhov chaw ntub dej lossis dej qab ntsev zoo dua li cov hlau liab qab. Plating ua haujlwm ib yam nkaus. Tsuas yog lub tsho nyias nyias ntawm npib tsib xee lossis tin ntawm tooj liab tuaj yeem nres oxidation hauv nws cov lem thiab pab lub dab dej kub ua nws txoj haujlwm rau xyoo. Xav txog ib qho nickel-plated tooj liab dab dej zaum hauv qhov chaw ntub dej; nws tseem yuav saib thiab ua haujlwm zoo li tshiab ntev tom qab ib qho tsis muaj coated pib nqis mus.
Xim thiab hmoov txheej pab los ntawm kev npog cov hlau, tab sis lawv tsuas yog zoo li lawv qhov chaw. Yog hais tias lawv tau khawb los yog chipped, corrosion sneaks nyob rau hauv. Nyias tshuaj coatings xws li chromates los yog phosphates ntxiv lwm txheej ntawm kev tiv thaiv, feem ntau mus ua ntej hmoov pleev xim rau thaub qab tiv thaiv. Raws li kev ua tiav cov haujlwm no zoo npaum li cas-anodized aluminium yuav luag ib txwm tau txais cov qhab nia saum toj kawg nkaus rau kev tiv thaiv corrosion, thiab nickel plating cov qhab nia siab dhau lawm. Aluminium liab qab pib tsim oxide sai, thiab tooj liab tarnishes nyob rau hauv tsis muaj sij hawm.
Tias yog vim li cas koj yuav pom anodizing lossis plating ntawm feem ntau cov dab dej kub siv sab nraud lossis hauv qhov chaw ua haujlwm ntxhib. Ob txoj kev ua haujlwm zoo ntawm kev thaiv cov pa oxygen thiab noo noo, yog li lub dab dej kub yuav kav ntev dua. Qhov kev xaiv zoo tshaj plaws tsuas yog nyob ntawm cov hlau koj ua haujlwm nrog thiab qhov twg lub dab dej yuav raug siv.
Kev txiav txim siab nqi
Tus nqi ib txwm tseem ceeb. Feem ntau, anodizing yog txoj hauv kev pheej yig dua mus rau aluminium kub dab dej, tshwj xeeb tshaj yog tias koj tab tom ua ib pawg loj. Nws yog cov txheej txheem ruaj khov, txhim khu kev qha rau txhua yam extruded lossis machined tawm ntawm txhuas. Plating, ntawm qhov tod tes, tuaj yeem dhau ntawm daim ntawv qhia tus nqi - ntse. Tin thiab npib tsib xee txheem tsis yog phem heev, tab sis thaum koj pib tham txog nyiaj lossis kub plating, daim nqi dhia nrawm. Thiab thaum koj nkag mus rau hauv cov txheej txheem tshwj xeeb-cov xim ceramics, tuab polymers- koj tsis yog them rau cov ntaub ntawv xwb. Koj tseem them nyiaj rau kev ua haujlwm ntxiv xws li kho thiab npog, uas noj sijhawm thiab nyiaj txiag.
Tus nqi hloov nyob ntawm seb lub txheej tuab npaum li cas thiab ntau npaum li cas npaj qhov xav tau. Hard anodizing, uas ua rau koj zoo dua hnav tsis kam, raug nqi ntau dua li niaj zaus. Hmoov txheej zoo li pheej yig rau ib feem, tab sis koj yuav siv sijhawm ntau dua los ua kom tiav cov khoom. Tiag tiag, anodizing hits qhov chaw qab zib: nws pheej yig thiab ua tiav txoj haujlwm. Plating lossis zoo nkauj coatings tsuas yog ua rau kev txiav txim siab yog tias koj xav tau ib yam dab tsi tshwj xeeb -xws li ib qho kev saib, los yog cov khoom uas anodizing tsis tuaj yeem muab rau koj. Hais tias koj xav tau ib tug ncej los ua hluav taws xob-ces koj yuav tsum tau phaj nws, thiab tus nqi yuav tsis tshua muaj kev txhawj xeeb.
Cov kab hauv qab: feem ntau cov neeg tsim qauv xaiv anodizing rau aluminium kub dab dej vim nws ua haujlwm zoo thiab tsis tawg lub txhab nyiaj. Yog tias koj xav tau cov khoom tshwj xeeb, xws li cov hlau tiav lossis ib qho xim, ces nws yuav tsim nyog them ntau dua rau plating lossis txheej txheej tshwj xeeb. Tsuas yog xyuas kom meej tias qhov kev ua tau zoo ntxiv lossis cov style yeej tsim nyog tus nqi. Ib qho yooj yim anodized heat sink feem ntau muab rau koj tus nqi ntau dua li tus nqi plated ib qho uas tsis tshua muaj qhov sib txawv hauv thermal ua haujlwm.
PowerWinxyog ib lub chaw muab kev pabcuam siab tshaj - ua haujlwm kub dab dej thiab cov khoom siv thermal tswj. Peb muab ntau yam ntawm cov dab dej kub nrog cov kev kho mob saum npoo av, los ntawm cov xim dub -anodized aluminium dab dej uas txhawb cov radiative txias rau corrosion-resistant nickel-plated tooj liab tsim. Los ntawm kev muab cov dab dej nrog qhov tseeb anodizing, plating, thiab txheej txheej xaiv, PowerWinx pab cov kws tsim hluav taws xob ua kom lawv cov cuab yeej txias thiab txhim khu kev qha.
