|
With the perfection of the semiconductor packaging processes , the luminous flux and light efficiency , power type LED traffic signs , urban landscape , automotive lighting , LED backlight , billboard , and other special lighting field has been widely applied to the general lighting market forward. However, with the continuous improvement of input power LED chip , large Daihatsu heat dissipation power and higher light efficiency LED packaging technology and equipment to newer and higher requirements . The power-type LED chip size of only 1mm × 1mm ~ 2.5mm × 2.5mm, the dissipation power of 1W or more , its flux density requirement has reached 100W/cm2 , once the temperature exceeds a certain value , the efficiency of the LED device failure will rising exponentially , and traditional entities heat sink as a package structure has been unable to meet the requirements under the high heat flux of high-power LED cooling requirements of low thermal resistance and high thermal efficiency of the new package heat sink high power LED industrialization of one of the key technologies to be solved . This paper the design and manufacture of a use of phase change heat transfer theory and cooling high power LED micro- phase change heat sink , and compared its performance with traditional physical heat sink experimental study , the main contents are as follows : 1 . Microfacies change heat sink design and manufacture . Based on the phase change heat transfer heat transfer enhancement principle , to match the requirements of high - power LED packaging design and manufacture a new type of micro-phase change heat sink . 2 micro-phase change heat sink performance test system development . Develop a virtual instrument - based micro- phase change heat sink performance test system can achieve real-time monitoring of the experiment , as well as data collection, storage , analysis and processing functions . 3 micro- phase change heat sink performance test platform structures . According to the basic principles of heat transfer , structures can be the test of micro- phase change heat sink performance test platform , in a variety of different operating conditions , the heating , cooling , and temperature of the the micro phase change heat sink testing . 4 micro-phase change heat sink heat transfer performance analysis . Performance test experiments , based on the experimental data , the different heating power , the working fluid types , different tilt angle , the performance of micro - phase change heat sink under different wick were analyzed and compared with the traditional physical heat sink performance .
|