Heat dissipation device

Abstract

An exemplary heat dissipation device includes a heat pipe and a plurality of fins. Each fin includes a main body and two edges bent from the main body. The edges of a rear fin contact a front adjacent fin. The main body defines a through hole receiving the heat pipe and a flange extends outwardly from a periphery of the through hole. A portion of the flange along a circumferential direction is shorter than the edge. A gap between the portion of the flange of the rear fin and the front adjacent fin receives excess solder forced out between the flanges of the fins and the heat pipe.

1 . A heat dissipation device, comprising:
 a heat pipe; and   a plurality of fins with an airflow channel between each neighboring pair of the fins, with each fin comprising a main body and at least one edge bent from the main body, the at least one edge of a rear fin contacting a front adjacent fin, the main body defining a through hole for receiving the heat pipe therein, a flange extending outwardly from a periphery of the through hole, at least one portion of the flange along a circumferential direction thereof being shorter than the at least one edge, and with a gap between the at least one portion of the flange of the rear fin and the front adjacent fin for receiving excess solder used to solder the heat pipe and the fins together.   
   
   
       2 . The heat dissipation device of  claim 1 , wherein the flange has a uniform height along the circumferential direction thereof, and is shorter than the at least one edge. 
   
   
       3 . The heat dissipation device of  claim 2 , wherein the gap is an annular gap between the flange of the rear fin and the front adjacent fin. 
   
   
       4 . The heat dissipation device of  claim 1 , wherein the flange is varied in height along the circumferential direction thereof, and a top portion of the flange is the same height as the at least one edge, and a bottom portion of the flange is shorter than the at least one edge. 
   
   
       5 . The heat dissipation device of  claim 4 , wherein the top portion of the flange of the rear fin contacts the front adjacent fin, and the bottom portion of the flange of the rear fin is spaced from the front adjacent fin. 
   
   
       6 . The heat dissipation device of  claim 1 , wherein the at least one edge comprises an inner portion connecting with the main body and an opposite outer portion, and two locking slots are defined at opposite ends of the inner portion of the at least one edge, with two fastening hooks corresponding to the locking slots at opposite ends of the outer portion of the at least one edge and received in the locking slots of the front fin to connect the fins. 
   
   
       7 . A heat dissipation device, comprising:
 a heat pipe;   a fin unit comprising a plurality of fins with an airflow channel between each neighboring pair of the fins, each fin comprising a main body and at least one edge bent from the main body, the at least one edge of a rear fin contacting a front adjacent fin, the main body defining a through hole receiving the heat pipe therein, a flange extending outwardly from a periphery of the through hole, the flange having an inner surface for enclosing the heat pipe, at least one portion of the flange along a circumferential direction thereof being shorter than the at least one edge, with a gap between the at least one portion of the flange of the rear fin and the front adjacent fin; and   a layer of solder on one of the inner surface of the flange and an outer surface of the heat pipe;   wherein when the heat pipe traverses the receiving channel from one end of the fin unit towards the other, excess solder is forced out of the inner surface of the flange by the heat pipe and enters gap.   
   
   
       8 . The heat dissipation device of  claim 7 , wherein the flange has a uniform height along the circumferential direction thereof, and is shorter than the at least one edge. 
   
   
       9 . The heat dissipation device of  claim 8 , wherein the gap is an annular gap formed between the flange of the rear fin and the front adjacent fin. 
   
   
       10 . The heat dissipation device of  claim 7 , wherein the flange is varied in height around the circumference direction thereof, and a maximal height of the flange equals the height of the at least one edge.