Fan duct and heat dissipation device using the same

Abstract

A fan duct includes a fan duct body and an airflow guiding plate connecting with the fan duct body. The fan duct has an air inlet for airflow flowing into the fan duct, and an air outlet for airflow exhausting out of the fan duct. One end of the airflow guiding plate connects the fan duct body near the air inlet, and the other end of the airflow guiding plate can be fixed at different positions of the fan duct body.

1 . A fan duct comprising:
 a fan duct body defining an air inlet for airflow to enter the fan duct and an air outlet for airflow to exhaust from the fan duct; and   an airflow guiding plate, one end of the airflow guiding plate near the air inlet pivotedly connecting the fan duct body, an opposite end of the airflow guiding plate away from the air inlet capable of being detachably fixed at different positions of the fan duct body.   
     
     
         2 . The fan duct of  claim 1 , wherein the fan duct body comprises a top plate and two side plates extending downwardly from two opposite lateral sides of the top plate, a pair of opposing pivot holes being respectively defined in the two side plates, the airflow guiding plate comprising a body located between the side plates, and a pivot extending outwardly from one end of the body, the pivot being pivotedly connected in the pivot holes of the side plates. 
     
     
         3 . The fan duct of  claim 2 , wherein the pivot holes are respectively defined in joints of the top plate and the side plates. 
     
     
         4 . The fan duct of  claim 2 , wherein a plurality of positioning holes are defined in each of the side plates, each positioning hole of one side plate being aligned with a corresponding one of the positioning holes of the other side plate along a horizontal direction, to thereby form a plurality of pairs of positioning holes corresponding to different heights, the airflow guiding plate further comprising two buckles extending from the other end of the body, the buckles being buckled in one of the pairs of positioning holes of the side plates. 
     
     
         5 . The fan duct of  claim 4 , wherein a protrusion protrudes outward from each buckle of the airflow guiding plate, the protrusion being buckled in a corresponding positioning hole of the side plate. 
     
     
         6 . The fan duct of  claim 4 , wherein the positioning holes are arranged in each side plate as an arc-shape. 
     
     
         7 . The fan duct of  claim 2 , wherein the top plate defines a through hole in an end thereof, the airflow guiding plate being mounted in the fan duct body near the through hole of the top plate. 
     
     
         8 . The fan duct of  claim 7 , wherein the body of the airflow guiding plate has an area larger than the through hole of the top plate. 
     
     
         9 . The fan duct of  claim 7 , wherein the pivot holes are located between the through hole of the top plate and the air inlet. 
     
     
         10 . The fan duct of  claim 7 , wherein the air inlet is located near the through hole of the top plate, and the air outlet is located away from the through hole of the top plate. 
     
     
         11 . A heat dissipation device comprising:
 a heat sink; and   a fan duct comprising:
 a fan duct body defining an air inlet for airflow to enter the fan duct and an air outlet for airflow to exhaust from the fan duct; and 
 an airflow guiding plate, one end of the airflow guiding plate near the air inlet pivotedly connecting the fan duct body, an opposite end of the airflow guiding plate away from the air inlet capable of being detachably fixed at different positions of the fan duct body to selectively match not only the height of the heat sink but also one or more other heights of one or more other heat sinks. 
   
     
     
         12 . The heat dissipation device of  claim 11 , wherein the fan duct body comprises a top plate and two side plates extending downwardly from two opposite lateral sides of the top plate, the heat sink being located between the two side plates, a pair of opposing pivot holes being respectively defined in the two side plates, the airflow guiding plate comprising a body located between the side plates, and a pivot extending outwardly from one end of the body, the pivot being pivotedly connected in the pivot holes of the side plates, the other end of the body of the airflow guiding plate abutting the heat sink. 
     
     
         13 . The heat dissipation device of  claim 12 , wherein a distance between the two side plates is substantially equal to a width of the heat sink. 
     
     
         14 . The heat dissipation device of  claim 12 , wherein the pivot holes are respectively defined in joints of the top plate and the side plates. 
     
     
         15 . The heat dissipation device of  claim 12 , wherein a plurality of positioning holes are defined in each of the side plates, each positioning hole of one side plate being aligned with a corresponding one of the positioning holes of the other side plate along a horizontal direction, to thereby form a plurality of pairs of positioning holes corresponding to different heights, the airflow guiding plate further comprising two buckles extending from the other end of the body, the buckles being buckled in one of the pairs of positioning holes of the side plates. 
     
     
         16 . The heat dissipation device of  claim 15 , wherein a protrusion protrudes outward from each buckle of the airflow guiding plate, the protrusion being buckled in a corresponding positioning hole of the side plate. 
     
     
         17 . The heat dissipation device of  claim 15 , wherein the positioning holes are arranged in each side plate as an arc-shape. 
     
     
         18 . The heat dissipation device of  claim 12 , wherein the top plate defines a through hole in an end thereof, the airflow guiding plate being mounted in the fan duct body near the through hole of the top plate. 
     
     
         19 . The heat dissipation device of  claim 18 , wherein the body of the airflow guiding plate has an area larger than the through hole of the top plate. 
     
     
         20 . The heat dissipation device of  claim 18 , wherein the pivot holes are located between the through hole of the top plate and the air inlet.