HEAT PIPE WITH COMPOSITE CAPILLARY WICK STRUCTURE

摘要

A heat pipe includes a metal casing (100) and a composite capillary wick received in the casing. The metal casing has an evaporating section (400), a condensing section (600) and a central section (500) between the evaporating section and the condensing section. First type of capillary wick (200) is provided on an inner all of the metal casing at all of the condensing, central and evaporating sections, while second type of capillary wick (220) is provided on the first type of capillary wick at the central and evaporating sections only. A capillary pore size of the first type of capillary wick is larger than that of the second type of capillary wick.