Flat-plate type capillary structure and plate heat pipe having the same

Abstract

A plate heat pipe includes a hollow housing formed in a plate shape and a flat-plate type capillary structure. The flat-plate type capillary structure includes a capillary boundary part and a plurality of primary capillary transportation parts; wherein the capillary boundary part is surroundingly arranged at the periphery of a vaporization portion of the plate heat pipe, and a hollow vapor flowing zone is defined between the capillary boundary part and the vaporization portion. Each of the primary capillary transportation parts is disposed in the vapor flowing zone and extended from the capillary boundary part to the vaporization portion so as to be respectively gathered on the vaporization portion.

What is claimed is: 
     
         1 . A flat-plate type capillary structure, including:
 a capillary boundary part, surroundingly arranged at the periphery of a vaporization portion of a plate heat pipe, wherein a hollow vapor flowing zone is defined between the capillary boundary part and the vaporization portion; and   a plurality of primary capillary transportation parts, disposed in the vapor flowing zone and extended from the capillary boundary part to the vaporization portion so as to be respectively gathered on the vaporization portion.   
     
     
         2 . The flat-plate type capillary structure according to  claim 1 , further including a capillary vaporization part disposed on the vaporization portion, wherein the primary capillary transportation parts are respectively connected to the capillary vaporization part. 
     
     
         3 . The flat-plate type capillary structure according to  claim 2 , wherein the capillary vaporization part is made of a woven net, sintering powders or sintering fibers, and disposed at a front end of each of the primary capillary transportation parts. 
     
     
         4 . The flat-plate type capillary structure according to  claim 2 , wherein the capillary vaporization part is formed with a plurality of heat transferring holes. 
     
     
         5 . The flat-plate type capillary structure according to  claim 2 , wherein the thickness of each of the primary capillary transportation parts is greater than that of the capillary vaporization part, and the thickness of each of the primary capillary transportation parts is equal to that of the capillary boundary part. 
     
     
         6 . The flat-plate type capillary structure according to  claim 1 , wherein a plurality of gas channels are formed on the capillary boundary part and arranged at intervals, and each of the gas channels is formed as being communicated from the outer edge to the inner edge of the capillary boundary part so as to be communicated with the vapor flowing zone. 
     
     
         7 . The flat-plate type capillary structure according to  claim 2 , wherein a plurality of secondary capillary transportation parts are formed between the primary capillary transportation parts, and the secondary capillary transportation parts are extended from the capillary boundary part towards the capillary vaporization part but not connected to the capillary vaporization part. 
     
     
         8 . The flat-plate type capillary structure according to  claim 7 , wherein a plurality of auxiliary capillary transportation parts are formed between the primary capillary transportation parts, the auxiliary capillary transportation parts are extended from the capillary boundary part towards the capillary vaporization part but not connected to the capillary vaporization part, and the length of the secondary capillary transportation part is longer than that of the auxiliary capillary transportation part. 
     
     
         9 . The flat-plate type capillary structure according to  claim 8 , wherein the thickness of the secondary capillary transportation part and the thickness of the auxiliary capillary transportation part are equal to or smaller than that of the primary capillary transportation parts. 
     
     
         10 . The flat-plate type capillary structure according to  claim 9 , wherein a connection rib is provided between two adjacent primary capillary transportation parts, two adjacent secondary capillary transportation parts or two adjacent auxiliary capillary transportation parts for the purpose of lateral connection. 
     
     
         11 . The flat-plate type capillary structure according to  claim 2 , wherein each of the primary capillary transportation parts is laterally extended with a capillary transportation surface having a thinner thickness. 
     
     
         12 . The flat-plate type capillary structure according to  claim 2 , wherein the vapor flowing zone is installed with a plurality of flat supporting structures. 
     
     
         13 . A plate heat pipe, including:
 a hollow housing, formed in a plate shape; and   a flat-plate type capillary, disposed in the housing to support a top and a bottom inner walls of the housing,   wherein flat-plate type capillary includes:   a capillary boundary part, surroundingly arranged at the periphery of a vaporization portion of a plate heat pipe, wherein a hollow vapor flowing zone is defined between the capillary boundary part and the vaporization portion; and   a plurality of primary capillary transportation parts, disposed in the vapor flowing zone and extended from the capillary boundary part to the vaporization portion so as to be respectively gathered on the vaporization portion.   
     
     
         14 . The plate heat pipe having the flat-plate type capillary structure according to  claim 13 , wherein the housing includes a base and a top cover engaged to the base to form a plate shape. 
     
     
         15 . The plate heat pipe having the flat-plate type capillary structure according to  claim 13 , wherein a distance is formed between the outer edge of the capillary boundary part of the capillary structure and a lateral inner wall of the housing. 
     
     
         16 . The plate heat pipe having the flat-plate type capillary structure according to  claim 13 , wherein the inner wall of the housing is formed with a plurality of grooves surrounding the capillary structure and partially connected to the capillary structure, and the depth of the groove is smaller than 30% of the wall thickness of the housing. 
     
     
         17 . The plate heat pipe having the flat-plate type capillary structure according to  claim 16 , wherein the depth of the groove is smaller than 0.03 mm.