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1、电子产品设计之热设计（Thermaldesignofelectronicproductdesign）ThermaldesignofelectronicproductdesignDesignmethodofradiatorRadiatordesignstepsUsually,thedesignoftheradiatorisdividedintothreesteps1:designscontoursaccordingtorelevantconstraints2:optimizethethicknessoftheradiator,theshape
2、oftheteeth,thespacingoftheteethandthethicknessofthesubstrateaccordingtotherelevantdesigncriteriaoftheradiator3:checkcalculationDesignmethodofradiatorDesignmethodofnaturalcoolingradiatorTakingintoaccountthenaturalcoolingtemperatureboundarylayeristhick,ifthetoothspacingistoo
3、small,thethermalboundarylayerofthetwoteetheasilycrossed,toothsurfaceconvectioneffect,soundernormalcircumstances,thespacingbetweentheteethsuggestnaturalcoolingradiatorisgreaterthan12mm,iftheradiatortoothheightlessthan10mm,accordingtothetoothspacingisgreaterthanorequalto1.2t
4、imestheheightoftoothtodeterminethetoothspacingoftheradiator.Naturalcoolingradiatorsurfaceheattransferabilityisweak,theincreaseinthesurfaceofthecoolingtoothrippleswillnotaffectthenaturalconvectioneffecttoomuch,soitisrecommendedtoheatthetoothsurfacewithoutcorrugatedteethNatu
5、ralconvectionheatsinksurfaceisgenerallyusedblacktreatment,inordertoincreasetheradiationcoefficientofheatradiationsurface,strengthenradiationheatexchangeSincenaturalconvectionreachesalongerperiodofthermalequilibrium,thesubstrateandthicknessofthenaturalconvectionradiatorshou
6、ldbesufficienttowithstandtheimpactoftheinstantaneousheatload,andisrecommendedtobegreaterthan5mmDesignmethodofradiatorDesignmethodofforcedcoolingradiatorThesurfaceoftheradiatoriscorrugated,andthedepthofthegeartoothshouldgenerallybelessthan0.5mm.Increasethenumberofteethofrad
7、iator.Atpresenttheinternationaladvancedextrusionequipmentandtechnologyhasbeenabletoreachhighaspectratioof23,theratioofheighttowidthmaximumcanreach8.toprovidecentralizedairenoughoftheoccasion,recommendtheuseofcoldplatevacuumsolderingmolding,theminimumtoothspacingto2mm.Thede
8、signofneedleteethisadoptedtoincreasethedisturbanceofthefluidandincreasetheconvectionheatt
