Heat pipe structure

Abstract

A heat pipe structure includes a tubular body. The tubular body has a first end and a second end and an airtight chamber. At least one capillary structure layer is disposed on a wall face of the tubular body. A working fluid is filled in the airtight chamber. Any of the first and second ends of the tubular body is such arranged as to be normal to a horizontal face. The first and second ends are respectively positioned at upper and lower ends of the tubular body. One end of the tubular body in contact with the horizontal face has a bulged space as an ice molecule releasing space after the working fluid is frozen.

1 . A heat pipe structure comprising a tubular body having a first end, a second end, and an airtight chamber, at least one capillary structure layer disposed on a wall face of the tubular body, and a working fluid filled in the airtight chamber, the first end and second end being respectively positioned at an axial upper end and an axial lower end of the tubular body, where the tubular body is erected to stand vertically such that an elevation of the first end at the axial upper end is higher than an elevation of the second end at the axial lower end and wherein the second end of the tubular body has a bulged space configured as an ice molecule releasing space after the working fluid is frozen. 
     
     
         2 . The heat pipe structure as claimed in  claim 1 , wherein the bulged space of the tubular body is positioned at the lower end of the tubular body, the bulged space having a capacity larger than that of any other portion of the tubular body. 
     
     
         3 . (canceled) 
     
     
         4 . The heat pipe structure as claimed in  claim 1 , wherein the bulged space is formed in such a manner that a tubular wall of the tubular body protrudes radially leftward or radially rightward to form the bulged space. 
     
     
         5 . The heat pipe structure as claimed in  claim 1 , wherein the tubular body is made of a material selected from a group consisting of aluminum, copper, stainless steel and titanium. 
     
     
         6 . The heat pipe structure as claimed in  claim 1 , wherein the working fluid is selected from a group consisting of water, coolant, methanol and acetone. 
     
     
         7 . The heat pipe structure as claimed in  claim 1 , wherein the bulged space is formed in such a manner that the tubular wall of the tubular body radially protrudes to form an expanded space.