- 學位論文
均熱板蒸氣流道與蒸發區結構對熱阻性能影響之研究
Study on the Performance of Vapor Chamber in Different Vapor Flow Channel and Structural of Evaporation Section
摘要
3C產品為吸引消費者目光，皆朝向輕薄短小的方向設計，電子散熱裝置也在此趨勢下受到嚴峻的挑戰，均熱板為一種以熱管為理論基礎的兩相變化熱傳冷卻系統，二相熱傳元件為一真空腔體內襯微結構於內壁上，利用腔體內部流體的蒸發凝結進行快速熱傳遞。本研究擬利用此熱傳原理製備一薄型均熱板，藉由不同蒸氣流道寬度之均熱板效能檢測，與腔體內部蒸發區不同形狀之燒結銅粉結構的導入應用，探討對性能之影響。 本研究將氣室高度固定於0.6 mm，製備蒸氣流道寬度2、4、6 mm之均熱板，並在蒸發區使用不同的微結構形狀，藉由與相同厚度銅塊和一般均熱板進行效能檢測。結果顯示不同流道寬度中以w6 VC在100 W時有最低熱阻0.194 ΔT/W，複合微結構中以十字溝槽均熱板在100 W時有0.186 ΔT/W熱阻值，成功改善一般薄型均熱板熱阻過高的問題。
並列摘要
3C products have been designed toward thinner and tiny scale as a result of attracting more attention of consumers. Thus, the improved efficiency of heat dissipation for electronic devices a difficult challenge. Vapor chamber is one kind of cooling system using theory of changed thermal conductivity from two-phase, which is based on heat pipe. This two-phase component consists of a wick structure which is inside the vacuum chamber wall; using the working fluid evaporation and condensation characteristic to speed up the thermal transmission. In this study, we fabricate the thin vapor chamber with using different vapor flow channel width, and different shapes of sintered copper powder inside the cavity of the evaporation area, to investigate the impact on performance of the vapor chamber. For this research, we use 0.6 mm thickness as the vapor space height. Preparation of 2, 4, 6 mm vapor flow channel width and different wick shape in evaporation area of the vapor chamber. Compare with normal vapor chamber and copper to detection performance. The result in different flow channel width test shows that w6 VC has a minimum resistance 0.194 ΔT/W at 100 W. In hybrids wick test, The cross groove VC has 0.186 ΔT/W resistance at 100 W. This study successfully improved the thin vapor chamber’s high heat resistance problem.