Patent Publication Number: US-2015060015-A1

Title: Air duct

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to an air duct. 
     2. Description of Related Art 
     Air flowing toward central processing units (CPUs) is often partially blown toward memory slots positioned adjacent to the CPUs, which will lower the heat dissipation efficiency for the CPUs. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, all the views are schematic, and like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is an assembled, isometric view of an embodiment of an air duct, together with a motherboard. 
         FIG. 2  is an exploded, isometric view of the air duct of  FIG. 1 . 
         FIGS. 3 and 4  are assembled, isometric view of the air duct of  FIG. 1 , but showing different using states. 
     
    
    
     DETAILED DESCRIPTION 
     The disclosure, including the accompanying drawings, is illustrated by way of example and not by way of limitation. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one. 
       FIGS. 1 and 2  show an embodiment of an air duct  20  mounted on a motherboard  40 . 
     A central processing unit (CPU)  42  and two memory slot groups  44  positioned at opposite sides of the CPU  42  are mounted on the motherboard  40 . A heat sink  10  is placed on the CPU  42 . 
     The heat sink  10  includes a board  12  and a plurality of fins  14  extending up from a top of the board  12  in a substantially perpendicular manner. 
     The air duct  20  includes two opposite sidewalls  22 , a top wall  24  connected between top sides of the sidewalls  22 , and two blocking members  26 . 
     Two tabs  240  extend out from opposite ends of a front side of the top wall  24 . Each tab  240  defines a through hole  242 . 
     Each blocking member  26  includes a connecting piece  260 , a blocking piece  262  perpendicularly extending down from a rear side of the connecting piece  260 , two supporting pieces  264  perpendicularly extending down from a front side of the connecting piece  260 , and two blocking plates  29 . The connecting piece  260  defines a fixing hole  266  in an end. The blocking piece  262  longitudinally defines a plurality of fixing holes  268 . Each blocking plate  29  longitudinally defines a plurality of fixing holes  290 . Two fasteners  50  respectively extend through two of the fixing holes  290  of the blocking plates  29  and then are respectively fixed in two of the fixing holes  268  of the blocking pieces  262 , to fix the blocking members  29  to the blocking pieces  262 , to lengthen the blocking members  26 . Because the blocking members  29  each define a plurality of fixing holes  290 , and the blocking pieces  262  each define a plurality of fixing holes  268 , the length of the blocking members  26  are adjustable. 
     Another two fasteners  50  extend through the through holes  242 , and then are engaged in the fixing holes  266 , to perpendicularly fix the blocking members  26  to outer surfaces of the sidewalls  22 . 
     In use, the air duct  20  accommodates the heat sink  10 , with the sidewalls  22  substantially parallel to the fins  14  and respectively contacting the outmost two fins  14 . The supporting pieces  264  and the sidewalls  22  are supported on the motherboard  40 . The blocking members  26  are located in front of and block the memory slot groups  44 . 
     The blocking members  26  block the memory slot groups  44 , to prevent airflow from flowing toward the memory slot groups  44 , and guide the airflow toward the heat sink  10  to dissipate heat generated by the CPU  42 . 
     Referring to  FIG. 3 , in another embodiment, one of the blocking members  26  can be omitted. 
     Referring to  FIG. 4 , in another embodiment, another blocking plate  29  can be mounted to the blocking plate  29 , to further lengthen the corresponding blocking member  26 . 
     It is believed that the present embodiments and their advantages will be understood from the foregoing description, and various changes may be made thereto without departing from the spirit and scope of the description or sacrificing all of their material advantages, the examples hereinbefore described merely being exemplary embodiments.