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 opposite ends thereof, and an adiabatic section ( 140 ) located between the evaporating section and the condensing section. A capillary wick ( 12 ) is arranged at an inner surface of the hollow metal casing. A working fluid is received in the metal casing. A sealed heat reservoir ( 20 ) is mounted on the condensing section of the heat pipe to increase heat dissipation area of the heat pipe. The heat reservoir has a capillary wick structure ( 22 ) and a working fluid therein.

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 arranged at an inner surface of the hollow metal casing; and   a sealed heat reservoir mounted on the condensing section of the heat pipe for increasing heat dissipation area, the heat reservoir having a second wick capillary wick structure and a second working fluid contained therein.   
   
   
       2 . The heat pipe of  claim 1 , wherein the condensing section of the heat pipe is inserted into the heat reservoir and engages with the heat reservoir. 
   
   
       3 . The heat pipe of  claim 1 , wherein the second capillary wick is arranged at an inner surface of the heat reservoir and an outer surface of the condensing section. 
   
   
       4 . The heat pipe of  claim 1 , wherein the heat reservoir comprises an outer wall and a pair of opposite lateral sides connect 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 condensing 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 both have circular cross sections. 
   
   
       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 both have quadrilateral cross sections. 
   
   
       11 . The heat pipe of  claim 1 , wherein a plurality of fins are mounted on an outer surface of the heat reservoir. 
   
   
       12 . The heat pipe of  claim 1 , wherein the heat reservoir surrounds the condensing section of the metal casing. 
   
   
       13 . The heat pipe of  claim 1 , wherein the condensing section of the heat pipe is inserted into the heat reservoir and soldered to the heat reservoir.