Heat dissipation device

Abstract

A heat dissipation device includes a housing, a fan mounted within the housing, a fin assembly fixed to the housing and heat pipes attached on the fin assembly. The housing includes a panel and a sidewall extending upwardly from a periphery of the panel. The fin assembly includes first fins and second fins alternately arranged on the panel. The first fins and the second fins each include a plate, an upper flange and a lower flange extending from a top side and a bottom side of the plate, respectively. Each second fin defines a slot in a lateral side of the plate thereof adjacent to the fan. Every two adjacent first fin and second fin define a channel therebetween. Two adjacent channels communicate with each other at inlets thereof via the slot, and separated from each other at outlets thereof via a second fin.

1 . A heat dissipation device comprising:
 a fan for generating an airflow, the fan defining an air outtake for exhausting the airflow; and   a fin assembly coupled to the air outtake of the fan, the fin assembly comprising a plurality of first fins and second fins each alternating with the first fins, each second fin defining a slot in a lateral side thereof adjacent to the fan;   wherein two adjacent first fin and second fin define an airflow channel therebetween, each channel has an inlet adjacent to the fan and an outlet away from the fan, and two adjacent channels are communicated with each other at the inlets thereof through a corresponding slot.   
     
     
         2 . The heat dissipation device of  claim 1 , wherein the two adjacent channels are separated at the outlets thereof by the corresponding second fin defining the slot. 
     
     
         3 . The heat dissipation device of  claim 2 , wherein each of the first fin and the second fin comprises a plate, and the plates of the first fins and the second fins are parallel to each other. 
     
     
         4 . The heat dissipation device of  claim 3 , wherein the slot is defined in the plate of each second fin. 
     
     
         5 . The heat dissipation device of  claim 4 , wherein the slot has a first section gradually expanding towards the fan. 
     
     
         6 . The heat dissipation device of  claim 5 , wherein the slot has a second section extending in a direction away from the first section and a third section extending downwardly towards a bottom side of the plate. 
     
     
         7 . The heat dissipation device of  claim 6 , wherein the second section communicates the first section with the third section. 
     
     
         8 . The heat dissipation device of  claim 5 , wherein each of the first fin and the second comprises an upper flange and a lower flange extending from a top side and a bottom side of the plate thereof, respectively. 
     
     
         9 . The heat dissipation device of  claim 8 , wherein the upper flange of each of the first fin and the second fin comprises a first section and a second section spaced from the first section. 
     
     
         10 . The heat dissipation device of  claim 9 , wherein the first section of the upper flange is parallel to the lower flange. 
     
     
         11 . The heat dissipation device of  claim 9 , wherein the second section is located lower than the first section and has an end bended upwardly towards the first section. 
     
     
         12 . The heat dissipation device of  claim 9 , wherein the slot of each second fin has a top edge terminated at the second section of the upper flange of the second fin, and a bottom edge terminated at the lower flange of the second fin. 
     
     
         13 . The heat dissipation device of  claim 9 , wherein the upper flange of each first fin further comprises a third section extending inclinedly from the second section thereof. 
     
     
         14 . The heat dissipation device of  claim 13 , wherein the third section has a width twice than that of the second section and the first section. 
     
     
         15 . The heat dissipation device of  claim 1  further comprising a housing, wherein the housing comprises a panel supporting the fan and a sidewall extending upwardly from a periphery of the panel. 
     
     
         16 . The heat dissipation device of  claim 15 , wherein the fan is surrounded by the sidewall. 
     
     
         17 . The heat dissipation device of  claim 16 , wherein the sidewall has two ends spaced from each other, the fin assembly being sandwiched between the two ends of the sidewall. 
     
     
         18 . The heat dissipation device of  claim 9  further comprising a heat pipe, wherein the second sections of the upper flanges of the first fins and the second fins cooperatively form a groove to receive the heat pipe. 
     
     
         19 . The heat dissipation device of  claim 1 , wherein the slot defined in each of the second fins is exposed to the fan.