Structure of low-profile heat pipe

Abstract

A structure of low-profile heat pipe includes a flat heat-transfer pipe head and an elongated flat flow-guide pipe body formed in integrity, a heat-transfer cover plate affixed to the flat heat-transfer pipe head and the elongated flat flow-guide pipe body, a cavity defined in between the flat heat-transfer pipe head and elongated flat flow-guide pipe body and the heat-transfer cover plate and holding a working fluid and defining a condensation side at its one end remote from the flat heat-transfer pipe head and an evaporation side at its other end within the flat heat-transfer pipe head, and a wick structure surrounding and in communication with the cavity.

What the invention claimed is: 
     
         1 . A structure of low-profile heat pipe, comprising:
 a flat heat-transfer pipe head;   an elongated flat flow-guide pipe body formed integral with and extended from one side of said flat heat-transfer pipe head;   an elongated recessed cavity located at a top wall of said flat heat-transfer pipe head and a top wall of said elongated flat flow-guide pipe body and extending along the length of said elongated flat flow-guide pipe body, said elongated recessed cavity defining a condensation side at one end thereof remote from said flat heat-transfer pipe head and an evaporation side at an opposite end thereof within said flat heat-transfer pipe head; and   a heat-transfer cover plate fixedly fastened to said flat heat-transfer pipe head and said elongated flat flow-guide pipe body to keep said elongated recessed cavity airtight.   
     
     
         2 . The structure of low-profile heat pipe as claimed in  claim 1 , further comprising an endless groove located at said flat heat-transfer pipe head and said elongated flat flow-guide pipe body in communication with and around said elongated recessed cavity; said heat-transfer cover plate is press-fitted into said endless groove and peripherally bonded to said flat heat-transfer pipe head and said elongated flat flow-guide pipe body. 
     
     
         3 . The structure of low-profile heat pipe as claimed in  claim 1 , further comprising a wick structure sintered on said flat heat-transfer pipe head and said elongated flat flow-guide pipe body within said elongated recessed cavity and a bottom wall of said heat-transfer cover plate corresponding to said elongated recessed cavity. 
     
     
         4 . The structure of low-profile heat pipe as claimed in  claim 1 , further comprising a plurality of flow-guide grooves formed in said elongated recessed cavity. 
     
     
         5 . The structure of low-profile heat pipe as claimed in  claim 1 , further comprising a working fluid sealed in said elongated recessed cavity. 
     
     
         6 . A structure of low-profile heat pipe, comprising:
 a flat base member being a single piece member comprising an expanded head portion, a narrow elongated body portion extended from a middle part of one side of said expanded head portion and a peripheral endless upright wall extending around said expanded head portion and said narrow elongated body portion;   a flat cover member fixedly fastened to said flat base member; and   an enclosed cavity defined in between said flat base member and said flat cover member, said enclosed cavity defining an evaporation side at one end thereof within said expanded head portion of said base member and a condensation side at an opposite end thereof within said narrow elongated body portion of said flat base member and remote from said expanded head portion.   
     
     
         7 . The structure of low-profile heat pipe as claimed in  claim 6 , wherein said flat base member further comprises an endless groove located on an inner surface of said peripheral endless upright wall; said flat cover member is press-fitted into said endless groove and then fixedly fastened to said flat base member. 
     
     
         8 . The structure of low-profile heat pipe as claimed in  claim 6 , further comprising a wick structure sintered on said flat base member and said flat cover member in communication with and around said enclosed cavity. 
     
     
         9 . The structure of low-profile heat pipe as claimed in  claim 6 , further said flat base member further comprises a plurality of flow-guide grooves formed in said enclosed cavity. 
     
     
         10 . The structure of low-profile heat pipe as claimed in  claim 6 , further comprising a working fluid sealed in said enclosed cavity.