Heat-dissipating structure with high heat-dissipating efficiency and method for manufacturing the same

Abstract

A method for manufacturing a heat-dissipating structure with high heat-dissipating efficiency, includes the following steps: providing a heat-dissipating casing having a hollow heat-dissipating body that has at least two ends; closing one end of the hollow heat-dissipating body; pouring work liquid from other end of the hollow heat-dissipating body into an inner portion of the hollow heat-dissipating body; cooling the work liquid from the liquid state to the solid state by an external cooling medium; extracting air from the hollow heat-dissipating body; and then closing the other end of the hollow heat-dissipating body to form an evacuated hollow heat-dissipating body.

1 . A heat-dissipating structure with high heat-dissipating efficiency, comprising:
 a heat-dissipating casing having an evacuated hollow heat-dissipating body and a plurality of microstructures integratedly formed on an inner surface of the hollow heat-dissipating body, wherein the hollow heat-dissipating body has at least two ends that have been closed; and   a plurality of solid work liquids received in the hollow heat-dissipating body.   
     
     
         2 . The heat-dissipating structure according to  claim 1 , wherein the heat-dissipating casing includes a plurality of supports integratedly formed in the hollow heat-dissipating body in order to divide an inner space of the hollow heat-dissipating body into a plurality of receiving spaces, and the solid work liquids are filled into the receiving spaces. 
     
     
         3 . The heat-dissipating structure according to  claim 2 , wherein the solid work liquids are selected from the group consisting of pure water, ammonia, methanol, ethanol, propane and heptane, and the receiving spaces receive the solid work liquids with the same property or different property. 
     
     
         4 . The heat-dissipating structure according to  claim 1 , wherein the heat-dissipating casing is a heat pipe, and the heat pipe has at least two ends that have been closed. 
     
     
         5 . The heat-dissipating structure according to  claim 1 , wherein the microstructures are composed of a plurality of capillary structures. 
     
     
         6 . The heat-dissipating structure according to  claim 1 , wherein the heat-dissipating casing is made of metal material, and the metal material is selected from the group consisting of aluminum, copper, iron, steel, stainless steel, nickel and titanium. 
     
     
         7 . The heat-dissipating structure according to  claim 1 , wherein the cross-sectional shape of each microstructure is triangle, square, rectangle, trapezoid or arc. 
     
     
         8 . A method for manufacturing a heat-dissipating structure with high heat-dissipating efficiency, comprising:
 providing a heat-dissipating casing having a hollow heat-dissipating body that has at least two ends;   closing one end of the hollow heat-dissipating body;   pouring work liquid from other end of the hollow heat-dissipating body into an inner portion of the hollow heat-dissipating body;   cooling the work liquid from the liquid state to the solid state by an external cooling medium;   extracting air from the hollow heat-dissipating body; and   closing the other end of the hollow heat-dissipating body to form an evacuated hollow heat-dissipating body.   
     
     
         9 . The method according to  claim 8 , wherein the heat-dissipating casing has a plurality of microstructures integratedly formed on an inner surface of the hollow heat-dissipating body. 
     
     
         10 . The method according to  claim 9 , wherein the microstructures are composed of a plurality of capillary structures. 
     
     
         11 . The method according to  claim 9 , wherein the cross-sectional shape of each microstructure is triangle, square, rectangle, trapezoid or arc. 
     
     
         12 . The method according to  claim 8 , wherein the heat-dissipating casing includes a plurality of supports integratedly formed in the hollow heat-dissipating body in order to divide an inner space of the hollow heat-dissipating body into a plurality of receiving spaces, and the work liquid is filled into the receiving spaces. 
     
     
         13 . The method according to  claim 12 , wherein the work liquid is selected from the group consisting of pure water, ammonia, methanol, ethanol, propane and heptane, and the receiving spaces receive the work liquid with the same property or different property, so that the same work liquid or different work liquid is filled in the receiving spaces. 
     
     
         14 . The method according to  claim 8 , wherein the heat-dissipating casing is made of metal material, and the metal material is selected from the group consisting of aluminum, copper, iron, steel, stainless steel, nickel and titanium. 
     
     
         15 . The method according to  claim 8 , wherein the hollow heat-dissipating body is a hollow pipe formed by extrusion molding or deep drawing, and hollow pipe has a plane shape, a fin shape or a groove shape. 
     
     
         16 . The method according to  claim 8 , wherein the external cooling medium is a freezer, a cryogenic cooler, refrigerant, liquid air, liquid nitrogen or liquid helium, and the cooling temperature of the external cooling medium is ranged from −273° C. to 15° C. 
     
     
         17 . The method according to  claim 8 , wherein the two ends of the hollow heat-dissipating body are closed by a press-fitting clamp with normal or high temperature, and the width of the clamp is equal to or larger than that of the hollow heat-dissipating body. 
     
     
         18 . The method according to  claim 8 , wherein the hollow heat-dissipating body has an inner coating formed on an inner surface thereof in order to increase air-tight seal level of the two ends of the hollow heat-dissipating body by electroplating, anode process, sol gel or chemical conversion coating, and the inner coating is made of copper, aluminum, tin, lead, zinc, magnesium, silicon or hot melt glue. 
     
     
         19 . The method according to  claim 8 , wherein air-tight seal level of the two ends of the hollow heat-dissipating body is increased by using physical or chemical process. 
     
     
         20 . The method according to  claim 19 , wherein the physical process includes plastic deformation, welding, laser, ultrasound wave or physical vapor deposition, and the chemical process includes electroplating, electroforming or chemical vapor deposition.