Abstract:
A heat dissipation device includes a support and an auxiliary blower to increase the efficiency of the heat dissipation from a computer. The location of the auxiliary blower is variable, to achieve the most effective heat dissipation. The support includes a support plate and a connection plate perpendicularly extending from an edge of the support plate. The connection plate defines an exhaust. The blower includes a housing. The housing includes a first surface, an opposing second surface, an inlet and an outlet communicating with the inlet. The blower is mounted on the support plate. The second surface contacts with the support plate. The inlet is positioned on the first surface. The outlet is aligned with the exhaust.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates to heat dissipation technologies, and particularly, to a heat dissipation device and a dissipation system having the heat dissipation device. 
         [0003]    2. Description of Related Art 
         [0004]    Electronic devices, such as computers, require dissipation of heat generated by electronic components, such as a central processing unit (CPU), a display card, or an expansion card, such as a video card or a graphics accelerator card, to prevent damage to the components from overheating. Thus, heat dissipation devices, such as fans are used to dissipate the heat generated by the electronic components. However, the large size of an expansion card makes the removal of heat from it a complex matter, and this is a difficult task for a simple fan, which does not perform the task efficiently. 
         [0005]    Therefore, it is desirable to provide a heat dissipation device and a heat dissipation system having the same, which can overcome or at least alleviate the limitations described. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]      FIG. 1  is a schematic, isometric view of a heat dissipation system including a heat dissipation device, according to an exemplary embodiment. 
           [0007]      FIG. 2  is an exploded view of the heat dissipation system of  FIG. 1 . 
           [0008]      FIG. 3  is an exploded view of the heat dissipation device of  FIG. 2 . 
       
    
    
     DETAILED DESCRIPTION 
       [0009]    Referring to  FIG. 1 , a heat dissipation system  100 , according to an exemplary embodiment, includes a computer enclosure  10 , a fan assembly  20 , a first heat source assembly  30 , a second heat source assembly  40 , and a heat dissipation device  50 . The fan assembly  20 , the first heat source assembly  30 , the second heat source assembly  40 , and the heat dissipation device  50  are positioned inside the computer enclosure  10  in the illustrated embodiment. 
         [0010]    The computer enclosure  10  is a cuboid. The computer enclosure  10  includes a back panel  12 , a front panel  14 , a side panel  16 , and a rectangular bottom panel  18 . The back panel  12 , the front panel  14 , and the side panel  16  perpendicularly extend from three edges of the bottom panel  18 . The front panel  14  is substantially parallel to the back panel  12 . The side panel  16  is perpendicularly connected between the back panel  12  and the front panel  14 . The back panel  12  defines a vent  120 . The front panel  14  includes a panel body  140  and a flange  142  perpendicularly extending from the panel body  140 . 
         [0011]    Referring to  FIG. 2  together with  FIG. 1 , the panel body  140  includes four elongated slots  144 , an elongated opening  146 , and four ribs  148 . The slots  144  are rectangular and parallel to each other. The longitudinal centerline of the slots  144  is perpendicular to the longitudinal centerline of the bottom panel  18 . The longitudinal centerline of the bottom panel  18  is from the back panel  12  to the front panel  14 . The opening  146  is vertically rectangular and one end of each of the four slots  144  extends into the opening  146 . The four ribs  148  are in line with the four slots  144  (although perpendicular to them) and project towards the interior of the computer enclosure  10 . The four ribs  148  and the opening  146  are positioned at opposite ends of the slots  144 . 
         [0012]    The flange  142  effectively forms a frame around the end of each of the slots  144  in the opening  146 . The flange  142  and the bottom panel  18  are positioned at opposite sides of the panel body  140 . Four engagement portions  1420  and four fixing threaded holes  1422  are formed on the flange  142 . In particular, the four engagements portions  1420  and the four fixing threaded holes  1422  serve the four slots  144 . In other words, there is a one-to-one correspondence between the slots  144 , the ribs  148 , the engagement portions  1420 , and the fixing threaded holes  1422 . 
         [0013]    The fan assembly  20  includes a fan  22  and an air guiding device  24 . The fan  22  is mounted on the internal side of the back panel  12  and aligned with the vent  120 . The air guiding device  24  is mounted on the back panel  12  and encloses the fan  22 . The air guiding device  24  is configured for introducing air flow from the fan  22  to the first heat source assembly  30  and the second heat source assembly  40 . 
         [0014]    The first heat source assembly  30  includes a motherboard  32  and electronic components  34 . The motherboard  32  is attached to the side panel  16 . The electronic components  34  are mounted on the motherboard  32  and electrically connected to the motherboard  32 . 
         [0015]    The second heat source assembly  40  includes a bracket  42  and an expansion card  44 . The bracket  42  includes a horizontal plate  420  and a vertical plate  422 . The horizontal plate  420  is substantially parallel to the bottom panel  18 . The vertical plate  422  perpendicularly extends from one end of the horizontal plate  420 . The vertical plate  422  includes a first end  4220  and an L-shaped second end  4222 . The first end  4220  and the second end  4222  are positioned at opposite sides of the vertical plate  422  along the lengthwise direction of the vertical plate  422 . The second end  4222  defines a connecting hole  4224  and a cutout  4226  independent of the connecting hole  4224 . The first end  4220  engages with a corresponding rib  148 . The second end  4222  extends through the opening  146 . The engagement portion  1420  engages with the cutout  4226 . A screw or bolt (bolt  60 ) extends through the connecting hole  4224  and engages in the corresponding fixing threaded hole  1422  so that the bracket  42  is mounted on the front panel  14  and the vertical plate  422  covers the corresponding slot  144 . The expansion card  44  is mounted on the horizontal plate  420  and is electrically connected to the motherboard  32 . 
         [0016]    The heat dissipation device  50  includes a support  52 , a blower  54 , and two fasteners or bolts (bolts  56 ). 
         [0017]    Referring to  FIGS. 1-3 , the support  52  includes a support plate  520  and a connection plate  522 . The support plate  520  is substantially parallel to the bottom plate  18 . The support plate  520  defines two first threaded holes  5202 . The connection plate  522  perpendicularly extends from an end of the support plate  520 . The connection plate  522  includes a connection body  5220 , a first connection portion  5222 , and a second connection portion  5224 . The connection body  5220  defines an exhaust opening  5228 . The first connection portion  5222  extends from one end of the connection body  5220 , the second connection portion  5224  perpendicularly extends from the other end of the connection body  5220 . The second connection portion  5224  and the support plate  520  are positioned at opposite sides of the connection body  5220 . The second connection portion  5224  defines an engagement hole  5226  and a second threaded hole  5227 . 
         [0018]    The blower  54  includes a housing  540  and a fan unit  542 . The housing  540  includes a fixing portion  544 , an air guiding portion  546 , and two protruding portions  548 . Without the air guiding portion  546 , the fixing portion  544  is substantially cylindrical and defines a receiving cavity  5440 . The air guiding portion  546  is substantially rectangular in section and defines a passage  5460  for guiding air. One end of the air guiding portion  546  extends from the circumferential wall of the fixing portion  544 , and the other end of the air guiding portion  546  defines an outlet  5462 . The protruding portions  548  extend from the circumferential wall of the fixing portion  544  and are diametrically opposed. Each protruding portion  548  defines a through hole  5480 , the through holes  5480  correspond to the two bolts  56  and the two first threaded holes  5202 . 
         [0019]    The housing  540  includes a first surface  540   a  and a second surface  540   b  opposite to the first surface  540   a.  The first surface  540   a  is parallel to the expansion card  44  and defines an inlet  5442  in the fixing portion  544 . The second surface  540   b  is attached on the support plate  520 . The fan unit  542  includes a plurality of blades rotatable about a rotation axis perpendicular to the support plate  520 . The fan unit  542  is received in the receiving cavity  5440  and is aligned with the inlet  5442 . The fan unit  542  is configured for blowing air to the outlet  5462  through the passage  5460 . 
         [0020]    When the heat dissipation device  50  is assembled, the bolts  56  extend the respective through holes  5480  and engage in the respective first threaded holes  5202  so that the blower  54  is mounted on the support plate  520  and the outlet  5462  is aligned with the exhaust opening  5228 . In other embodiments, the blower  54  may be mounted on the support plate  520  with adhesive. 
         [0021]    In this embodiment, the heat dissipation device  50  is positioned between the bottom panel  18  and the second heat source assembly  40 . In other embodiments, the second heat source assembly  40  may be positioned between the bottom panel  18  and the heat dissipation device  50 . 
         [0022]    When the heat dissipation device  50  is mounted on the computer enclosure  10 , the first connection portion  5222  engages with a corresponding rib  148 , and the second connection portion  5224  extends through the opening  146 . The engagement hole  5226  engages with the corresponding engagement portion  1420 . A screw or bolt (bolt  70 ) extends through the second threaded hole  5227  and engages in the corresponding fixing threaded hole  1422  so that the support  52  is mounted on the front panel  14  and the connection plate  522  covers the corresponding slot  144 . 
         [0023]    When the heat dissipation system  100  is working, the fan  22  blows air onto the first heat source assembly  30  and the second heat source assembly  40 . The air carries away the heat generated from the first heat source assembly  30  and the second heat source assembly  40 . The air is taken into the inlet  5442  and blown to the outlet  5462  by the fan unit  542 , thereby removing hot air from inside the computer enclosure  10 . The heat dissipation efficiency of the heat dissipation system  100  is significantly greater than other heat dissipation systems. 
         [0024]    It is to be understood, however, that even though numerous characteristics and advantages of the present embodiments have been set fourth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in details, especially in matters of the shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.