HEAT PIPE WITH VARIABLE GROOVED-WICK STRUCTURE AND METHOD FOR MANUFACTURING THE SAME

摘要

A heat pipe ( 10 ) includes a casing ( 11 ), a plurality of grooves ( 12, 13 ) defined in the casing, and working fluid contained in the casing. The casing includes a first portion ( 14 ) and a second portion ( 15 ) having a smaller diameter than the first portion. The grooves ( 12 ) at the first portion of the casing have greater apex angles and smaller groove width than those of the grooves ( 13 ) at the second portion. A method for manufacturing the heat pipe includes the steps of: providing a casing with a plurality of grooves defined in an inner wall thereof; shrinking a diameter of one portion of the casing to enable the portion to function as an evaporator section of the heat pipe; vacuuming and placing a predetermined quantity of working fluid in the casing; sealing the casing to obtain the heat pipe.