Heat pipe with wick structure of screen mesh

Abstract

A heat pipe ( 10 ) includes a hollow pipe body ( 20 ) for receiving a working fluid therein and a screen mesh ( 30 ) disposed in the pipe body. The screen mesh includes at least two layers. One of the two layers is in the form of a planar layer ( 50 ) and the other is in the form of a wave layer ( 40 ). A plurality of flowing channels ( 48 ) is formed by the wave layer. The channels formed by the wave layer of the screen mesh are capable of reducing the flow resistance for the condensed fluid to flow back while pores in the screen mesh provide a relatively large capillary pressure for drawing the condensed fluid to flow back.

1 . A heat pipe comprising: 
 a hollow pipe body for receiving a working fluid therein;    a screen mesh furled and disposed in the pipe body, the screen mesh comprising at least two layers, one of the at least two layers is in the form of a planar layer and another of the at least two layers in the form of a wave layer; and    a plurality of flowing channels being formed by the wave layer for the working fluid received in the heat pipe to flow.    
   
   
       2 . The heat pipe as claimed in  claim 1 , wherein the wave layer comprises a horizontal section and a vertical section alternately arranged along a circumferential direction of pipe body, and each flowing channel has a trapezoid-shaped cross section.  
   
   
       3 . The heat pipe as claimed in  claim 1 , wherein the wave layer comprises a plurality of continuous serrations, and each flowing channel has a triangle-shaped cross section.  
   
   
       4 . The heat pipe as claimed in  claim 1 , wherein the wave layer comprises a plurality of horizontal sections and a plurality of serrations each interconnecting two horizontal sections, and the flowing channels comprises a triangle-shaped first flow channel and a trapezoid-shaped second flow channel alternately arranged along a circumferential direction of pipe body.  
   
   
       5 . The heat pipe as claimed in  claim 1 , wherein the wave layer of the at least two layers is directly attached to the pipe body.  
   
   
       6 . The heat pipe as claimed in  claim 1 , wherein the screen mesh comprises three layers stacked on each other along a radial direction of the pipe body.  
   
   
       7 . The heat pipe as claimed in  claim 6 , wherein the three layers comprise two planar layers and a wave layer sandwiched between the two planar layers.  
   
   
       8 . The heat pipe as claimed in  claim 6 , wherein the three layers comprise two wave layers and a planar layer sandwiched between the two wave layers.  
   
   
       9 . The heat pipe as claimed in  claim 8 , wherein the wave layers have a pore size different from that of the planar layer.  
   
   
       10 . The heat pipe as claimed in  claim 8 , wherein each layer of the screen mesh has a pore size different from that of the other layers.  
   
   
       11 . A heat pipe comprising: 
 a pipe body having an inner wall;    working fluid received in the pipe body;    a screen mesh rolled and installed in the pipe body and abutting against the inner wall thereof, the screen mesh having a plurality of pores therein for drawing the working fluid from a first section to a second section the pipe body, the screen mesh forming circumferentially distributed flowing channels in pipe body, the flowing channels being larger than the pores in the screen mesh, the flowing channels extending along a longitudinal direction of the pipe body.    
   
   
       12 . The heat pipe of  claim 11 , wherein the screen mesh comprises a wave layer and a planar layer, the wave layer abutting against the inner wall of the pipe body.  
   
   
       13 . The heat pipe of  claim 12 , wherein the wave layer is square-wave shaped, and comprises alternate upper and lower horizontal sections and vertical sections between the horizontal sections, the upper horizontal sections abutting against the inner wall of the pipe body, and the vertical sections together with the inner wall forming the channels.  
   
   
       14 . The heat pipe of  claim 12 , where the wave layer comprises of a plurality of continuous serrations.  
   
   
       15 . The heat pipe of  claim 12 , wherein the wave layer includes a plurality of horizontal sections and a plurality of serrations each interconnecting two horizontal sections, the serrations being equally spaced from each other and tips thereof abutting the inner wall of the pipe body, the wave layer forming a plurality of trapezoid-shaped flowing channels with the inner wall of the pipe body, and a plurality of triangle-shaped flowing channels with the planar layer.  
   
   
       16 . The heat pipe of  claim 11 , wherein the screen mesh comprises two planar layers and a wave layers sandwiched between the two planar layers, one of the two planar layers abutting against the inner wall of the pipe body.  
   
   
       17 . The heat pipe of  claim 11 , wherein the screen mesh comprises two wave layers and a planar layer sandwiched between the two wave layers, one of the two wave layers abutting against the inner wall of the pipe body.  
   
   
       18 . The heat pipe of  claim 17 , wherein the two wave layers have a pore size which is different from that of the planar layer.  
   
   
       19 . The heat pipe of  claim 17 , wherein the two wave layers have different pore sizes which are different from that of the planar layer.  
   
   
       20 . A heat pipe comprising: 
 a pipe body having an inner wall;    a screen mesh disposed in the pipe body and abutting against the inner wall of the pipe body, the screen mesh comprising a plurality of layers stacked on each other along a radial direction of the pipe body, wherein two neighboring layers have different configurations with one of which having a wave-like configuration.