Flat-type heat pipe and wick structure thereof

Abstract

The present invention provides a flat-type heat pipe and a wick structure thereof. The flat-type heat pipe has a flat tube. The wick structure is arranged inside the flat tube along an axial line of the flat tube. The wick structure comprises a first wick portion and two second wick portions connected on both sides of the first wick portion. The thickness of the first wick portion is larger than that of the second wick portion. The first wick portion abuts against an upper inner wall of the flat tube. An air channel is formed between each of the second wick portions and the upper inner wall of the flat tube. The wick structure supports the inner wall of the flat-type heat pipe without providing additional supporting structure, so that the heat pipe can be made more compact.

1 . A flat-type heat pipe, configured to perform heat exchange with a heat source and including:
 a flat tube having a lower surface brought into thermal contact with the heat source;   a working fluid filled in the flat tube; and   a wick structure arranged inside the flat tube along an axial line of the flat tube, the wick structure comprising a first wick portion and two second wick portions connected on both sides of the first wick portion, the thickness of the first wick portion being larger than that of the second wick portion, the first wick portion abutting against an upper inner wall of the flat tube, an air channel being formed between each of the second wick portions and the upper inner wall of the flat tube.   
     
     
         2 . The flat-type heat pipe according to  claim 1 , wherein the wick structure is made of sintered metal powder, the first wick portion and the two second wick portions are connected to a lower inner wall of the flat tube. 
     
     
         3 . The flat-type heat pipe according to  claim 2 , wherein the width of the first wick portion covers a region on both sides of a central axial line of the flat tube to support the region on both sides of the central axial line of the flat tube, the width of the first wick portion is larger than the width of the second wick portion. 
     
     
         4 . The flat-type heat pipe according to  claim 3 , wherein the width of the wick structure is equal to that of the heat source. 
     
     
         5 . A wick structure of a flat-type heat pipe, the flat-type heat pipe having a flat tube, the wick structure being arranged inside the flat tube along an axial line of the flat tube, characterized in that:
 the wick structure comprises a first wick portion and two second wick portions connected on both sides of the first wick portion, the thickness of the first wick portion is larger than that of the second wick portion, the first wick portion abut against an upper inner wall of the flat tube, an air channel is formed between each of the second wick portions and the upper inner wall of the flat tube.   
     
     
         6 . The wick structure of a flat-type heat pipe according to  claim 5 , wherein a lower surface of the flat tube is brought into thermal contact with a heat source, the wick structure is made of sintered metal powder, the first wick portion and the two second wick portions are connected to a lower inner wall of the flat tube. 
     
     
         7 . The wick structure of a flat-type heat pipe according to  claim 6 , wherein the width of the first wick portion covers a region on both sides of a central axial line of the flat tube to support the region on both sides of the central axial line of the flat tube, the width of the first wick portion is larger than the width of the second wick portion.