Heat dissipating system and duct cover thereof

Abstract

A heat dissipating system includes a chassis, a number of heat dissipating members received in the chassis, and a number of duct cover. The chassis defines a number of cavities corresponding to the outlets of the heat dissipating members is defined in the chassis. Each duct cover includes an outer flap and an inner flap. An opening is defined in the outer flap. The outer flap is rotatably mounted to the chassis to cover or uncover the corresponding cavity. The inner flap is rotatably mounted to the outer flap to cover or uncover the opening.

1 . A heat dissipating system comprising:
 a chassis with a plurality of cavities defined in the chassis;   a plurality of heat dissipating members received in the chassis, each heat dissipating member having an outlet, wherein the outlets of the plurality of heat dissipating elements are aligned with the plurality of cavities accordingly; and   a plurality of duct covers mounted to the chassis, each duct cover comprising an outer flap rotatably mounted to the chassis to cover or uncover a corresponding cavity and an inner flap, wherein the outer flap defines an opening, the inner flap is rotatably mounted to the outer flap to cover or uncover the opening.   
     
     
         2 . The heat dissipating system of  claim 1 , wherein each cavity of the chassis is rectangular, the outer flap of each duct cover is rectangular to suit for the corresponding cavity. 
     
     
         3 . The heat dissipating system of  claim 1 , wherein two collars extend from the outer flap, aligned at an upper portion, and at opposite sides of the opening, a pivot hole is defined in each collar, and the pivot holes are aligned on a straight line, two pivot shafts extend from opposite ends of a top side of the inner flap, to be rotatably engaged in the pivot holes of the collar of the outer flap to rotatably mount the inner flap to the outer flap. 
     
     
         4 . The heat dissipating system of  claim 1 , wherein two collars extend from the chassis, aligned at an upper portion, and at opposite sides of each of the cavities, a pivot hole is defined in each collar, and the pivot holes are aligned on a straight line, two pivot shafts extend from opposite ends of a top side of the outer flap, to be rotatably engaged in the pivot holes of the collars to rotatably mount the outer flap to the chassis. 
     
     
         5 . The heat dissipating system of  claim 1 , wherein the opening of each outer flap is rectangular, and the inner flap is rectangular to suit for the opening. 
     
     
         6 . The heat dissipating system of  claim 1 , wherein the first and inner flaps are made of plastic. 
     
     
         7 . An duct cover configured for covering an cavity of a chassis, the duct cover comprising:
 a outer flap capable of being rotatably mounted to the chassis, wherein the outer flap defines an opening; and   a inner flap rotatably mounted to the outer flap to cover or uncover the opening;   wherein the area of the inner flap is greater than or equal to the area of the opening of the outer flap, while smaller than the area of the outer flap.   
     
     
         8 . The duct cover of  claim 7 , wherein two collars extend from the outer flap, aligned at an upper portion, and at opposite sides of the opening, a pivot hole is defined in each collar, and the pivot holes are aligned on a straight line, two pivot shafts extend from opposite ends of a top side of the inner flap, to be rotatably engaged in the pivot holes of the collar of the outer flap to rotatably mount the inner flap to the outer flap. 
     
     
         9 . The duct cover of  claim 7 , wherein two pivot shafts extend from opposite ends of a top side of the outer flap, to rotatably mount the outer flap to the chassis. 
     
     
         10 . The duct cover of  claim 7 , wherein the opening is rectangular, and the inner flap is rectangular to suit for the opening. 
     
     
         11 . The duct cover of  claim 7  being made of plastic.