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.