推荐回答（3个）
热管散热器是利用热管技术能对许多老式散热器或换热产品和系统作重大的改进而产生出的新产品。热管散热器有自然冷却和强迫风冷两大类。风冷热管散热器的热阻阻值能做得更小，常用于大功率电源中。热管散热器由密封管、吸液芯和蒸汽通道组成。吸液芯环绕在密封管的管壁上，浸有能挥发的饱和液体。这种液体可以是蒸馏水，也可以是氨、甲醇或丙酮等。充有氨、甲醇、丙酮等液体的热管散热器在低温时仍具有很好的散热能力。热管散热器运行时，其蒸发段吸收热源(功率半导体器件等) 产生的热量，使其吸液芯管中的液体沸腾化成蒸汽。带有热量的蒸汽就从热管散热器的蒸发段向其冷却段移动，当蒸汽把热量传给冷却段后，蒸汽就冷凝成液体。冷凝的液体便通过管壁上吸液芯的毛细管作用返回到蒸发段，如此重复上述循环过程不断地散热。热管散热器是一种高效率的散热器件，它具有独特的散热特性。即它具有高的导热率，它的蒸发段和冷却段之间温度沿轴向的分布是均匀和基本相等的。散热器的热阻是由材料的导热性和体积内的有效面积决定的。实体铝或铜散热器在体积达到0.006m³时，再加大其体积和面积也不能明显减小热阻了。对于双面散热的分立半导体器件，风冷的全铜或全铝散热器的热阻只能达到0.04℃/W。
而热管散热器可达到0.01℃/W。在自然对流冷却条件下，热管散热器比实体散热器的性能可提高十倍以上。热管散热器具有如下优点：热响应速度快，它转移热量的能力比相同尺寸和重量的铜管要大1000多倍;体积小和重量轻;散热效率高，可简化电子设备的散热设计，如变风冷为自冷;不需外加电源，工作时不需专门维护;具有很好的等温性，热平衡后，其蒸发段和冷却段的温度梯度相当小，可近似认 为是0;运行安全可靠，不污染环境。 Big-bit 半导体应用网热管散热器解决方案的7大优点和5大限制来源。
大比特商务网 今天的大功率LED灯具(300瓦以上)主要采用热管散热器进行散热，但这种散热技术目前也面临着PC处理器散热沿袭下来的均温板和复合槽群散热技术的挑战，下文会帮助您明白为什么超频三科技如此钟爱热管散热技术。 大功率(300瓦以上)LED户外灯具散热除了可考虑采用目前市场很受欢迎的热管散热器以外，还可以考虑采用从PC高速处理器散热传承下来的均温板和复合槽群散热器，下文先为大家介绍热管散热技术的工作原理和优缺点，接下来再为大家介绍均温板和复合槽群散热技术。
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