Heat pipe

Abstract

A heat pipe includes a hollow metal casing ( 10 ). The casing has an evaporating section ( 120 ) and a condensing section ( 160 ) at respective opposite ends thereof, and an adiabatic section ( 140 ) located between the evaporating section and the condensing section. A capillary wick structure ( 12 ) is arranged at an inner surface of the hollow metal casing. A sealed heat reservoir ( 20 ) is mounted on the evaporating section of the heat pipe to increase heat absorbing area of the heat pipe. The heat reservoir has working fluid and a capillary wick structure ( 22 ) therein. Heat generated by a heat source is first absorbed by the heat reservoir and then transferred to the evaporating section of the metal casing.

1 . A heat pipe comprising:
 a hollow metal casing having an evaporating section for receiving heat and a condensing section for releasing the heat, and an adiabatic section located between the evaporating section and the condensing section;   a first working fluid contained in the metal casing;   a first capillary wick structure arranged at an inner surface of the hollow metal casing; and   a sealed heat reservoir mounted on the evaporating section of the heat pipe for absorbing heat generated by a heat source and transferring the heat generated by the heat source to the evaporating section of the metal casing, wherein the heat reservoir has a second working fluid and a second capillary wick structure contained therein.   
   
   
       2 . The heat pipe of  claim 1 , wherein the evaporating section of the heat pipe is inserted into the heat reservoir and is interferentially connected with the heat reservoir. 
   
   
       3 . The heat pipe of  claim 1 , wherein the second capillary wick structure is arranged at an inner surface of the heat reservoir and an outer surface of the evaporating section. 
   
   
       4 . The heat pipe of  claim 1 , wherein the heat reservoir comprises an outer wall and a pair of opposite lateral sides connects with two opposite ends of the outer wall. 
   
   
       5 . The heat pipe of  claim 4 , wherein an inner wall is formed in the heat reservoir, and the evaporating section of the heat pipe is inserted into the heat reservoir and engaged with the inner wall of the heat reservoir. 
   
   
       6 . The heat pipe of  claim 1 , wherein the heat pipe and the heat reservoir respectively have a circular cross section. 
   
   
       7 . The heat pipe of  claim 1 , wherein the heat pipe has a circular cross section and the heat reservoir has a quadrilateral cross section. 
   
   
       8 . The heat pipe of  claim 1 , wherein the heat pipe has a quadrilateral cross section and the heat reservoir has a circular cross section. 
   
   
       9 . The heat pipe of  claim 1 , wherein the heat pipe has a circular cross section and the heat reservoir has a triangular cross section. 
   
   
       10 . The heat pipe of  claim 1 , wherein the heat pipe and the heat reservoir each have a quadrilateral cross section. 
   
   
       11 . The heat pipe of  claim 1 , wherein the heat reservoir surrounds the evaporating section of the metal casing. 
   
   
       12 . The heat pipe of  claim 1 , wherein the evaporating section of the metal casing is inserted into the heat reservoir and soldered to the heat reservoir.