Loop heat pipe structure

Abstract

A loop heat pipe structure includes an evaporation chamber body and a tube body. The evaporation chamber body has an upper case body and a lower board body. The upper case body and the lower board body together define a closed chamber in which a capillary structure is disposed. The evaporation chamber body has an outlet and an inlet in communication with the closed chamber. A working fluid is filled in the closed chamber. Two ends of the tube body are respectively connected with the outlet and the inlet. The upper case body and the lower board body of the evaporation chamber body and the tube body are made of various materials in combination with each other so as to improve the shortcoming of the conventional loop heat pipe that the strength is insufficient and reduce the total weight of the loop heat pipe.

What is claimed is: 
     
         1 . A loop heat pipe structure comprising:
 an evaporation chamber body having an upper case body and a lower board body, the upper case body and the lower board body together defining a closed chamber in which a capillary structure is disposed, the evaporation chamber body having an outlet and an inlet in communication with the closed chamber, a working fluid being filled in the closed chamber; and   a tube body having a first end, a second end and a middle section, the first and second ends being respectively positioned at two ends of the middle section, the first and second ends being respectively connected with the outlet and inlet of the evaporation chamber body, the upper case body, the lower board body and the tube body being made of different materials in combination with each other according to requirements, the materials being selected from a group consisting of titanium, stainless steel, copper, ceramic, aluminum, iron and graphite.   
     
     
         2 . The loop heat pipe structure as claimed in  claim 1 , wherein a heat dissipation unit is disposed on outer side of the tube body, the heat dissipation unit being composed of multiple radiating fins or multiple cooling tube bodies. 
     
     
         3 . The loop heat pipe structure as claimed in  claim 1 , wherein the closed chamber further has a compensation chamber and at least one vapor passage, one end of the vapor passage being in communication with the outlet. 
     
     
         4 . The loop heat pipe structure as claimed in  claim 3 , wherein the vapor passage is selectively disposed on a wall face of the evaporation chamber body, which faces the capillary structure or disposed on one side of the capillary structure, which faces the evaporation chamber body, one end of the vapor passage being correspondingly connected with the outlet, the working fluid being converted between vapor phase and liquid phase, the vapor-phase working fluid and the liquid-phase working fluid being circulated within the entire interior of the loop heat pipe structure. 
     
     
         5 . The loop heat pipe structure as claimed in  claim 3 , wherein the vapor passage is selectively disposed on a wall face of the evaporation chamber body, which faces the capillary structure or disposed on one side of the capillary structure, which faces the evaporation chamber body, one end of the vapor passage being correspondingly connected with the outlet, the working fluid being converted between vapor phase and liquid phase, the vapor-phase working fluid and the liquid-phase working fluid being circulated within the entire interior of the loop heat pipe structure. 
     
     
         6 . The loop heat pipe structure as claimed in  claim 3 , wherein the outlet and the inlet are disposed on different sides of the evaporation chamber body, the second end of the tube body entering the closed chamber from the inlet of the evaporation chamber body and extending to one side distal from the compensation chamber. 
     
     
         7 . The loop heat pipe structure as claimed in  claim 3 , wherein the evaporation chamber body is a flat-plate evaporation chamber body, the compensation chamber being correspondingly disposed in parallel to the capillary structure. 
     
     
         8 . The loop heat pipe structure as claimed in  claim 1 , wherein the evaporation chamber body has a liquid passage, one end of the liquid passage being connected with the inlet, the liquid passage being disposed on one side of the capillary structure, the liquid passage and the vapor passage being respectively correspondingly disposed on upper and lower sides of the capillary structure. 
     
     
         9 . The loop heat pipe structure as claimed in  claim 1 , wherein the capillary structure has multiple channels in adjacency to the lower board body, each channel having an open side and a closed side, the open side being attached to the lower board body, the open side having a width smaller than that of the closed side. 
     
     
         10 . The loop heat pipe structure as claimed in  claim 1 , wherein the capillary structure is formed of sintered powder, the powder being selected from a group consisting of copper, aluminum, titanium and plastic fiber.