Abstract:
An apparatus includes a side plate and a rear plate perpendicular to the side plate. A motherboard is mounted on the side plate. The motherboard has a heat source attached thereon. The rear plate defines a ventilation area. The ventilation and the heat source are located at different heights. A fan is mounted on the ventilation area. The fan inclines towards the plurality of expansion cards.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present embodiment relates to electronic device enclosures, and particularly to an electronic device enclosure that has good heat dissipation ability. 
         [0003]    2. Description of Related Art 
         [0004]    Nowadays, various electrical instruments, and especially desktop computers, are crowded with different electrical components and peripheral devices, such as the central processing units (CPUs), the graphic cards, and so on. These electrical components generate heat during operation. The inner temperature of the desktop computer enclosure can become very high. Therefore, one or more fans are often installed on the enclosure to remove the heat generated by the electrical components, to ensure that the electrical components maintain a moderate operating temperature. 
         [0005]    In some situation, users often update the hardware configuration of the computer, such as adding more power electrical components, or change electrical components. After users do these changes, a heat dissipation balance of the enclosure is usually broken. For example, when an electrical component which generates much heat is added, and the original fans of the enclosure can not drive air flowing to the electrical component, the electric component is often overheated. 
         [0006]    Therefore, there is room for improvement within the art. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    Many aspects of the 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 embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
           [0008]      FIG. 1  is an exploded and schematic view of an embodiment of a electronic device enclosure; 
           [0009]      FIG. 2  is a schematic view of a fan of the electronic device enclosure of  FIG. 1 ; 
           [0010]      FIG. 3  is an assembled view of the electronic device enclosure of  FIG. 1 ; and 
           [0011]      FIG. 4  is an assembled view of another embodiment of a electronic device enclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0012]    Referring to  FIG. 1 , an electronic device enclosure  30  includes a rear plate  33  and a side plate  35  perpendicular to the rear plate  33 . A right side of the enclosure  30  defines an opening, and a plate can be mounted there to cover the opening. 
         [0013]    A power supply  50  is mounted in the enclosure  30 . A fan is mounted in the power supply  50  to dissipate heat generated by the power supply  50 . A motherboard  40  is mounted on the side plate  35  of the enclosure  30 . The motherboard  40  comprises some electrical components, such as a CPU, expansion cards  45 , mounted thereon. A CPU fan  43  is mounted on the CPU to dissipate heat generated by the CPU. The motherboard  40  defines a plurality of expansion slots  41  for the expansion cards  45  to be inserted therein. The expansion cards  45  generate much heat. 
         [0014]    The rear plate  33  of the enclosure  30  defines a ventilation area  335  in which a plurality of ventilation slots  331  is defined. The ventilation slots  331  are used to communicate outside of the enclosure  30  with inside of the enclosure  30 . Four plate screw holes  332  are defined at four corners of the ventilation area  335  correspondingly. The ventilation area  335  is located above the expansion cards  45 . 
         [0015]    Four adjusting screws  70  are capable of screwing into the plate screw holes  332  correspondingly. Each adjusting screw  70  includes a shaft  71  and a head  73 . A plurality of external screw threads is formed on the shaft  70 . The head  73  is used to conveniently drive the screw  70 . 
         [0016]    Referring to  FIGS. 1 and 2 , a fan  60  is mounted on the ventilation area  335  of the rear plate  33 . The fan  60  includes a frame  61 , which includes a first wall  64  and a second wall  65 . The first wall  64  and the second wall  65  are parallel with each other. Four corners of the second wall  65  define four second screw holes  651  correspondingly. Each screw hole  651  extends through the second wall  65 . Four corners of the first wall  64  define four first screw holes  641  correspondingly. Each screw hole  641  does not extends through the first wall  64 . 
         [0017]    Referring to  FIGS. 1 and 3 , the second wall  65  of the fan  60  is mounted on the ventilation area  335  of the rear plate  33 . The second screw holes  651  of the second wall  65  are in alignment with the plate screw holes  332  of the rear plate  33 . Each adjusting screw  70  screws into corresponding plate screw hole  332  and second screw hole  651 , and further screws into corresponding first screw hole  641  until a distal end of the adjusting screw  70  resists against the first wall  64 . Therefore, the fan  60  is mounted on the rear plate  33  by the adjusting screws  70 . 
         [0018]    Then, two upper adjusting screws  70  of the four adjusting screws  70  continue screwing in the first screw holes  641  to push an upper portion of the fan  60  to incline towards the expansion card  45 . Therefore, the fan  60  can drive air flowing to the expansion cards  45  to help the expansion cards  45  dissipate heat. 
         [0019]    Referring to  FIGS. 1 and 4 , another kind of motherboard  90  is mounted on the side plate  35  of the enclosure  30 . The motherboard  90  comprises some electrical components, such as a CPU, expansion cards  95 , mounted thereon. The expansion cards  95  generate much more heat. The expansion cards  95  are located above the ventilation area  335 . The fan  60  is mounted on the rear plate  33  by the adjusting screws  70  screwing into the plate screw holes  332 , the second screw holes  651 , and the first screw holes  641 . Two lower adjusting screws  70  of the four adjusting screws  70  continue screwing to push a lower portion of the fan  60  to incline towards the expansion cards  95 . Therefore, the fan  60  can drive air flowing to the expansion cards  95  to help the expansion card  95  dissipate heat. 
         [0020]    It is to be understood, however, that even though numerous characteristics and advantages of the embodiments have been set forth in the foregoing description, together with details of the structure and function of the embodiments, the disclosure is illustrative only, and changes may be made in details, especially in matters of shape, size, and arrangement of parts within the principles of the present disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.