可折叠笔记本电脑,采用柔性热管将CPU热量传导至显示屏背板,通过自然对流将热量带走,实现笔记本电脑CPU的温度控制.针对这一结构,采用Fluent软件建立笔记本电脑热管散热结构对应的物理模型,在自然对流条件下,改变柔性热管的弯折角度,研究不同弯折角度对散热性能的影响,分析不同条件下的温度变化曲线.设计显示屏背板作为模型主要散热结构.结果表明,在柔性热管恒定导热系数和随角度变化导热系数条件下,模型散热能力均随热管弯折角度减小而增大,同时,考虑了增加辐射后对模型散热能力的影响大小,考虑辐射后,总体散热趋势无较大变化.
In order to control the temperature of CPU in laptop,a flexible heat pipe was used to transfer CPU heat to the back of the display panel,and the heat was taken away by natural convection.The related physical models of laptop using heat pipe for heat dissipation were established with the software Fluent,heat dissipation by changing the bending angle of the flexible heat pipe under natural convection was studied,and temperature change curves of model monitoring part were analyzed.The back plate of the display screen was designed as the main heat dissipation structure of the model.The results showed that heat dissipation capacity of model increased with bending angle decreases under the same or angle-dependent thermal conductivity of flexible heat pipe.Meaningwhile,the influence of radiation on the heat dissipation capacity of the model was studied.After considering radiation,there was no significant change in the overall heat dissipation trend.