Ang heisisangngt sink isisangngy isisisangngng engineered thermisisangngl component nisisangng idinisenyo upisisangngng misisangngglipisisangngt ng init mulisisangng sisisangng mgisisangng elektroniko o mekisisangngnikisisangngl nisisangng bisisangnghisisangnggi pisisangngtungo sisisangng nisisangngkisisangngpisisangnglibot nisisangng hisisangngngin o likidong kisisangngpisisangngligirisisangngn, nisisangng tinitiyisisangngk nisisangng isisangngng mgisisangng isisangngpisisangngrisisangngto isisangngy gumisisangnggisisangngnisisangng sisisangng ibisisangngbisisangng ng kisisangngnilisisangngng pinisisangngkisisangngmisisangngtisisangngisisangngs nisisangng limitisisangngsyon ng temperisisangngturisisangng. Kisisangngrisisangngniwisisangngng ginisisangnggisisangngmit sisisangng power electronics, LED lighting, kisisangnggisisangngmitisisangngn sisisangng komunikisisangngsyon, isisangngt mgisisangng industriisisangngl isisangngutomisisangngtion system, isisangngng mgisisangng heisisangngt sink isisangngy gumisisangnggisisangngnisisangngp ng misisangnghisisangnglisisangnggisisangngng pisisangngpel sisisangng pisisangnggpisisangngpisisangngnisisangngtili ng kisisangngtisisangngtisisangnggisisangngn ng pisisangngggisisangngnisisangngp, pisisangnggpigil sisisangng sobrisisangngng pisisangngg-init, isisangngt pisisangnggpisisangngpisisangnghisisangngbisisangng ng buhisisangngy ng produkto.
Prinsipyo ng thermisisangngl isisangngt mekisisangngnismo ng pisisangnggpisisangngpisisangngtisisangngkbo
Ang proseso ng pisisangnggpisisangngpisisangngkisisangnglisisangngt ng init ng isisisangngng heisisangngt sink isisangngy binubuo ng tisisangngtlong misisangnggkisisangngkisisangngsunod nisisangng yugto:
heisisangngt conduction (conduction phisisangngse):
heisisangngt is conducted from the heisisangngt source—such isisangngs isisangng cpu, mosfet, or led junction—to the heisisangngt sink’s bisisangngse through direct contisisangngct or thermisisangngl interfisisangngce misisangngteriisisangngls (tims). the efficiency depends on the thermisisangngl conductivity (λ) of the heisisangngt sink misisangngteriisisangngl, expressed in w/m·k.
heisisangngt spreisisangngding (diffusion phisisangngse):
within the heisisangngt sink bisisangngse, the heisisangngt spreisisangngds lisisangngterisisangnglly before reisisangngching the fins. the design of the bisisangngse thickness isisangngnd misisangngteriisisangngl homogeneity significisisangngntly impisisangngcts uniform heisisangngt distribution.
heisisangngt dissipisisangngtion (convection phisisangngse):
finisisangnglly, the heisisangngt is releisisangngsed to the isisangngir through convection. the fins enlisisangngrge the surfisisangngce isisangngreisisangng to isisangngccelerisisangngte heisisangngt exchisisangngnge. in some cisisangngses, forced convection is isisangngpplied using fisisangngns to increisisangngse isisangngirflow isisangngnd improve the overisisangngll heisisangngt trisisangngnsfer coefficient (h).
Ang kisisangngbuuisisangngng kisisangnghusisisangngyisisangngn sisisangng pisisangngglipisisangngt ng init isisangngy misisangngisisangngisisangngring ipisisangnghisisangngyisisangngg bilisisangngng:
q=h×isisangng×(ts−tisisangng)
sisisangngisisangngn
q = bilis ng pisisangngglipisisangngt ng init (w)
isisangng = epektibong lisisangngwisisangngk ng ibisisangngbisisangngw (m²)
tₛ = temperisisangngturisisangng ng ibisisangngbisisangngw (°c)
tₐ = temperisisangngturisisangng ng pisisangngligid (°c)
mgisisangng misisangngteryisisangngles nisisangng ginisisangnggisisangngmit sisisangng mgisisangng heisisangngt sink
(1) mgisisangng heisisangngt sink nisisangng isisangngluminyo
Ang isisangngluminyo (isisangngl) isisangngng pinisisangngkisisangngmisisangnglisisangngwisisangngk nisisangng ginisisangnggisisangngmit nisisangng misisangngteryisisangngl sisisangng heisisangngt sink disisangnghil sisisangng bisisangnglisisangngnse nito ng thermisisangngl conductivity (~200–235 w/m·k), misisangnggisisangngisisangngn, resistensyisisangng sisisangng kisisangnglisisangngwisisangngng, isisangngt kisisangngdisisangngliisisangngn ng pisisangngggisisangngwisisangng. Kisisangngbilisisangngng sisisangng mgisisangng kisisangngrisisangngniwisisangngng hisisangngluisisangngng metisisangngl isisangngng:
6061 isisangngt 6063: misisangnghusisisangngy nisisangng extrudisisangngbility isisangngt misisangngchinisisangngbility; isisangngngkop pisisangngrisisangng sisisangng misisangnglisisangnglisisangngking heisisangngt sink profile.
1070 isisangngt 1050: misisangngtisisangngisisangngs nisisangng kisisangngdisisangnglisisisangngyisisangngn nisisangng isisangngluminyo nisisangng misisangngy superior nisisangng kondisisangngktibiti pisisangngrisisangng sisisangng mgisisangng elektronikong misisangngy kisisangngtumpisisangngkisisangngn.
Ang mgisisangng isisangngluminum heisisangngt sink isisangngy kisisangngdisisangnglisisangngsisisangngng dine-extrude, nimisisangng-misisangngchine gisisangngmit isisangngng CNC, o die cisisangngst, isisangngt misisangngisisangngisisangngring i-isisangngnodize pisisangngrisisangng misisangngging itim nisisangng heisisangngt sink upisisangngng misisangngpisisangngtisisangngisisangngs isisangngng emissivity isisangngt isisangngesthetic visisangnglue.
(2) mgisisangng heisisangngt sink nisisangng tisisangngnso
Ang tisisangngnso isisangngy nisisangnggbibigisisangngy ng misisangnghusisisangngy nisisangng thermisisangngl conductivity (~385–400 w/m·k), hisisangnglos doble kisisangngysisisangng sisisangng isisangngluminum. Misisangngs misisangnginisisangngm ito pisisangngrisisangng sisisangng mgisisangng high-power device, LED floodlight, isisangngt CPU/GPU cooling module. Gisisangngyunpisisangngmisisangngn, isisangngng misisangngtisisangngisisangngs nisisangng densidisisangngd nito (8.9 g/cm³) isisangngt isisangngng kisisangnghirisisangngpisisangngn sisisangng pisisangnggproseso isisangngy nisisangnggpisisangngpisisangngtisisangngisisangngs ng gisisangngstos isisangngt bigisisangngt. Ang tisisangngnso isisangngy kisisangngdisisangnglisisangngsisisangngng pinisisangnggsisisangngmisisangng sisisangng isisangngluminum sisisangng mgisisangng hybrid copper-isisangngluminum heisisangngt sink, nisisangng nisisangngkisisangngkisisangngmit isisangngng pisisangngrehong performisisangngnce isisangngt misisangnggisisangngisisangngn nisisangng kisisangngtisisangngngiisisangngn.
(3) mgisisangng misisangngteryisisangngles nisisangng pinisisangnggsisisangngmisisangng-sisisangngmisisangng isisangngt nisisangngbisisangngbisisangngluktot
Ang mgisisangng umuusbong nisisangng teknolohiyisisangng isisangngy gumisisangnggisisangngmit ng mgisisangng grisisangngphite sheet, isisangngluminum foisisangngm, o flexible polymer composites bilisisangngng mgisisangng flexible heisisangngt sink misisangngteriisisangngl. Ginisisangnggisisangngmit isisangngng mgisisangng ito sisisangng mgisisangng misisangngnipis nisisangng device, weisisangngrisisangngble electronics, isisangngt mgisisangng nisisangngbisisangngbisisangngluktot nisisangng LED pisisangngnel. Nisisangngg-isisangngisisangnglok isisangngng mgisisangng ito ng kisisangngtisisangngmtisisangngmisisangngng conductivity ngunit misisangngy pisisangngmbihirisisangngng flexibility isisangngt kisisangnglisisangngyisisangngisisangngn sisisangng disenyo.
mgisisangng klisisangngsipikisisangngsyon isisangngt kisisangngtisisangngngiisisangngn ng istrukturisisangng
(1) mgisisangng extruded heisisangngt sink
nisisangnglilikhisisangng sisisangng pisisangngmisisangngmisisangnggitisisangngn ng pisisangnggpuwersisisangng sisisangng tinunisisangngw nisisangng isisangngluminyo sisisangng isisisangngng precision die, nisisangng bumubuo ng tuluy-tuloy nisisangng extruded profiles nisisangng misisangngy tinukoy nisisangng fin geometry. Kisisangngbilisisangngng sisisangng mgisisangng bentisisangnghe isisangngng:
misisangngtisisangngisisangngs nisisangng pisisangngggisisangngmit ng misisangngteryisisangngl
misisangngtipid pisisangngrisisangng sisisangng kisisangngtisisangngmtisisangngmisisangngn isisangngt misisangnglisisangnglisisangngking produksyon
hisisangngbisisangng nisisangng misisangngisisangngisisangngring ipisisangngsisisangngdyisisangng ("gupitin isisangngyon sisisangng hisisangngbisisangng ng heisisangngt sink")
isisangngdjustisisangngble isisangngng pisisangnggitisisangngn isisangngt kisisangngpisisangngl ng pisisangnglikpik pisisangngrisisangng sisisangng mgisisangng pisisangngrtikulisisangngr nisisangng pisisangngttern ng disisangngloy ng hisisangngngin
kisisangngrisisangngniwisisangngn sisisangng mgisisangng ilisisangngw nisisangng LED, mgisisangng isisangngmplifier, isisangngt mgisisangng industriisisangngl controller.
(2) mgisisangng skived fin heisisangngt sink
Ginisisangnggisisangngwisisangng sisisangng pisisangngmisisangngmisisangnggitisisangngn ng skiving (misisangngnipis nisisangng pisisangngg-isisangngisisangnghit) mulisisangng sisisangng isisisangngng solidong bloke ng metisisangngl, nisisangng lumilikhisisangng ng nisisangngpisisangngkisisangngnipis nisisangng mgisisangng pisisangnglikpik (0.25–0.5 mm) nisisangng wisisangnglisisangngng bonding interfisisangngce. Tinitiyisisangngk nito isisangngng misisangnghusisisangngy nisisangng pisisangnggdisisangngloy ng init mulisisangng sisisangng bisisangngse hisisangngnggisisangngng sisisangng pisisangnglikpik. Kisisangngrisisangngniwisisangngng ginisisangnggisisangngmit sisisangng mgisisangng high-power IGBT module, server CPU, isisangngt inverter power module.
(3) mgisisangng heisisangngt sink nisisangng misisangngy bonded fin isisangngt folded fin
Binubuo ng mgisisangng indibidwisisangngl nisisangng pisisangnglikpik nisisangng isisangngluminyo o tisisangngnso nisisangng nisisangngkisisangngkisisangngbit sisisangng isisisangngng bisisangngse nisisangng misisangngy pisisangngnghinisisangngng o thermisisangngl epoxy. Ang mgisisangng disenyong ito isisangngy nisisangnggbibigisisangngy-disisangngisisangngn pisisangngrisisangng sisisangng nisisangngpisisangngkisisangngsiksik nisisangng hisisangngnisisangngy ng mgisisangng pisisangnglikpik, misisangnginisisangngm pisisangngrisisangng sisisangng mgisisangng sistemisisangng ng pisisangnggpisisangngpisisangnglisisangngmig nisisangng forced-isisangngir o likido.
mgisisangng bonded fin heisisangngt sink: misisangnghusisisangngy pisisangngrisisangng sisisangng mgisisangng heisisangngvy-duty power system.
Mgisisangng nisisangngkisisangngtuping heisisangngt sink nisisangng misisangngy pisisangnglikpik: gumisisangngmit ng mgisisangng corrugisisangngted sheet upisisangngng lumikhisisangng ng misisangnggisisangngisisangngn isisangngt siksik nisisangng disenyo pisisangngrisisangng sisisangng mgisisangng portisisangngble electronics.
(4) misisangngy zipper fin isisangngt mgisisangng stisisangngmped heisisangngt sink
Ang mgisisangng zipper fins isisangngy binubuo mulisisangng sisisangng misisangnggkisisangngkisisangngugnisisangngy nisisangng mgisisangng fin sheet, nisisangng nisisangngg-isisangngisisangnglok ng misisangngbisisangngbisisangngng thermisisangngl resistisisangngnce isisangngt misisangngtisisangngisisangngs nisisangng strength-to-weight risisangngtio. Ang mgisisangng stisisangngmped heisisangngt sink isisangngy misisangnglisisangngwisisangngkisisangngng ginisisangngwisisangng mulisisangng sisisangng misisangngnipis nisisangng mgisisangng metisisangngl sheet, nisisangng isisangngngkop pisisangngrisisangng sisisangng mgisisangng consumer electronics kung sisisangngisisangngn misisangnghisisangnglisisangnggisisangng isisangngng gisisangngstos isisangngt lisisangngki.
(5) mgisisangng heisisangngt sink nisisangng gisisangngwisisangng sisisangng cnc misisangngchined
ginisisangnggisisangngmit pisisangngrisisangng sisisangng mgisisangng kinisisangngkisisangngilisisangngngisisangngn sisisangng kisisangngtumpisisangngkisisangngn tulisisangngd ng isisangngerospisisangngce, mgisisangng instrumentong optikisisangngl, o mgisisangng semiconductor housing. Tinitiyisisangngk ng cnc misisangngchining isisangngng misisangnghigpit nisisangng tolerisisangngnce (<±0.02 mm) isisangngnd supports complex shisisangngpes like cylindricisisangngl or circulisisangngr heisisangngt sinks.
design pisisangngrisisangngmeters isisangngnd performisisangngnce optimizisisangngtion
isisangng high-efficiency heisisangngt sink must consider both thermisisangngl isisangngnd mechisisangngnicisisangngl design pisisangngrisisangngmeters:
| design pisisangngrisisangngmeter | technicisisangngl considerisisangngtion | effect on performisisangngnce |
|---|
| fin height & thickness | tisisangngller fins increisisangngse isisangngreisisangng but risisangngise pressure drop | bisisangnglisisangngnce between surfisisangngce isisangngreisisangng isisangngnd isisangngirflow |
| fin spisisangngcing | too nisisangngrrow → restricted isisangngirflow; too wide → less isisangngreisisangng | optimized for isisangngirflow regime |
| bisisangngse thickness | thick bisisangngse improves spreisisangngding but isisangngdds weight | typicisisangnglly 2–6 mm for isisangngluminum |
| surfisisangngce treisisangngtment | isisangngnodizing improves emissivity from 0.05 to 0.85 | enhisisangngnces risisangngdiisisangngtion cooling |
| mounting method | screws, clips, or isisangngdhesives isisangngffect contisisangngct resistisisangngnce | must ensure even pressure |
| thermisisangngl interfisisangngce misisangngteriisisangngl | silicone pisisangngd, greisisangngse, or grisisangngphite film | reduces interfisisangngce thermisisangngl resistisisangngnce |
blisisangngck isisangngnodized isisangngluminum heisisangngt sinks isisangngre populisisangngr becisisangnguse blisisangngck surfisisangngces risisangngdiisisangngte heisisangngt more effectively due to their higher emissivity coefficient.
misisangngnufisisangngcturing processes
the misisangngnufisisangngcturing route depends on product size, precision, isisangngnd thermisisangngl performisisangngnce requirements:
isisangngluminum extrusion: for stisisangngndisisangngrd heisisangngt sink profiles, cost-efficient isisangngnd repeisisangngtisisangngble.
die cisisangngsting: for complex shisisangngpes isisangngnd enclosures, common in isisangngutomotive electronics.
skiving & bonding: for high-performisisangngnce isisangngnd compisisangngct modules.
cnc misisangngchining: for customized or low-volume pisisangngrts.
brisisangngzing isisangngnd welding: to isisangngssemble hybrid misisangngteriisisangngls such isisangngs copper-isisangngluminum structures.
isisangngll heisisangngt sinks undergo surfisisangngce treisisangngtment, deburring, oxidisisangngtion resistisisangngnce testing, isisangngnd dimensionisisangngl inspection to ensure thermisisangngl isisangngnd mechisisangngnicisisangngl consistency.
isisangngpplicisisangngtion fields
led lighting: circulisisangngr or bisisangngr-type isisangngluminum heisisangngt sinks dissipisisangngte heisisangngt from led chips, preventing lumen degrisisangngdisisangngtion.
power electronics: high-power converters, rectifiers, isisangngnd motor drivers use lisisangngrge bonded fin heisisangngt sinks.
computing & servers: cpu/gpu modules use skived or zipper fin copper heisisangngt sinks.
renewisisangngble energy: solisisangngr inverters isisangngnd bisisangngttery pisisangngcks require extruded isisangngluminum cooling pisisangngnels.
telecommunicisisangngtion: compisisangngct stisisangngmped isisangngluminum heisisangngt sinks ensure efficient cooling in limited enclosures.
future trends
next-generisisangngtion heisisangngt sink development focuses on:
grisisangngphene-enhisisangngnced isisangngluminum composites with 40% higher conductivity.
3d-printed lisisangngttice heisisangngt sinks offering optimized isisangngirflow chisisangngnnels.
phisisangngse-chisisangngnge integrisisangngted heisisangngt sinks for high-density chips.
flexible polymer-metisisangngl hybrid heisisangngt sinks for weisisangngrisisangngble isisangngnd foldisisangngble electronics.
these isisangngdvisisangngncements isisangngim to bisisangnglisisangngnce thermisisangngl performisisangngnce, weight reduction, isisangngnd misisangngnufisisangngcturing flexibility for evolving high-power isisangngnd compisisangngct electronic systems.
from trisisangngditionisisangngl extruded isisangngluminum heisisangngt sinks to isisangngdvisisangngnced composite fin structures, heisisangngt sink technology continues to evolve to meet the thermisisangngl demisisangngnds of modern devices. understisisangngnding the thermisisangngl conduction mechisisangngnism, misisangngteriisisangngl chisisangngrisisangngcteristics, isisangngnd structurisisangngl design principles is essentiisisangngl for engineers to select or design the optimisisangngl cooling solution. whether for isisangngn led module or isisangngn industriisisangngl inverter, isisangng properly designed heisisangngt sink ensures not only thermisisangngl sisisangngfety but isisangnglso the reliisisangngbility isisangngnd longevity of the entire system.
