Abstract:
An air duct includes a base and a latching portion extending from the base. The base includes a resilient portion and two blocking plates. The latching portion is configured to receive a fan. The resilient portion is elastic deformable to fasten the base to the fan. The latching portion defines a ventilation hole for air flowing through in a first direction. The two blocking plates are configured to prevent the air from flowing back to the ventilation hole in a second direction opposite to the first direction. A cooling module with the air duct and an electronic device with the air duct are further disclosed.

Description:
FIELD 
       [0001]    The subject matter herein generally relates to an electronic device with a cooling module with an air duct. 
       BACKGROUND 
       [0002]    An electronic device, such as a computer, generally includes an enclosure, a central processing unit (CPU), a heat sink, and a fan. The heat sink cools the CPU, and the fan is operated to guide air to flow to the heat sink to cool the heat sink. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0003]    Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
           [0004]      FIG. 1  is an exploded, isometric view of an embodiment of an air duct and a cooling module. 
           [0005]      FIG. 2  is an isometric view of the air duct and the cooling module of  FIG. 1 . 
           [0006]      FIG. 3  is an assembled, isometric view of the air duct and the cooling module of  FIG. 1 . 
           [0007]      FIG. 4  is similar to  FIG. 3 , but viewed from a different angle. 
           [0008]      FIG. 5  is an assembled, isometric view of within an enclosure of an electronic device. 
       
    
    
     DETAILED DESCRIPTION 
       [0009]    It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure. 
         [0010]    Several definitions that apply throughout this disclosure will now be presented. 
         [0011]    The term “substantially” is defined to be essentially conforming to the particular dimension, shape or other word that substantially modifies, such that the component need not be exact. For example, substantially cylindrical means that the object resembles a cylinder, but can have one or more deviations from a true cylinder. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like. 
         [0012]      FIG. 1  illustrates an electronic device with an air duct in accordance with an embodiment. The air duct  100  can guide air to flow in a cooling module  30 . The cooling module  30  can be secured to an enclosure  50  (shown as in  FIG. 5 ) of the electronic device. 
         [0013]      FIGS. 1 and 2  illustrate that the air duct  100  can include a base  10  and a latching portion  20  extending from the base  10 . The base  10  can include a first connecting plate  11 , a second connecting plate  12 , and two blocking plates  15 . The first connecting plate  11  is substantially parallel to the second connecting plate  12 . The first connecting plate  11  and the second connecting plate  12  are connected between the two blocking plates  15 . The first connecting plate  11 , the second connecting plate  12 , and the two blocking plates  15  cooperatively define a ventilation hole  16 . Two mounting tabs  111  extend from opposite ends of the first connecting plate  11 . A resilient portion  121  can be pressed from the second connecting plate  12 . 
         [0014]    The latching portion  20  can include a top plate  21  and two limiting plates  22  extending from opposite edges of the top plate  21 . In at least one embodiment, the top plate  21  is substantially perpendicular to the first connecting plate  11  and the limiting plates  22 , and each limiting plate  22  is substantially perpendicular to the first connecting plate  11 . A cutout  23  is defined between the two limiting plates  22  away from the first connecting plate  11 , allowing the air duct  100  to be secured to the cooling module  30 . Each limiting plate  22  comprises a first guiding piece  221  away from the top plate  21 , a second guiding piece  222  adjacent to the top plate  21 , and a third guiding piece  223  between the first guiding piece  221  and the second guiding piece  222 . The third guiding piece  223  is near to the base  10  relative to the first guiding piece  221  and the second guiding piece  222 . Each of the first guiding piece  221 , the second guiding piece  222 , and the third guiding piece  223  extends towards the ventilation hole  16 . An operation portion  225  is located in an outer surface of each limiting plate  22 . 
         [0015]    Referring to  FIG. 1 , the cooling module  30  can include a heat sink  31 , a fan  32  (shown as in  FIG. 4 ), and a fan case  33 . The heat sink  31  can include four installation portions  311 . A fastener  40  can be inserted through the installation portions  311  to secure the heat sink  31  to a motherboard  55  (shown as in  FIG. 5 ). The fan  32  is secured to the fan case  33  and is operable to guide air to flow to the heat sink  31 . 
         [0016]    The fan case  33  can include a rear frame  331  and a front frame  332 . The rear frame  331  can be secured to the heat sink  31 , and the air duct  100  can be secured to the front frame  332 . A distance between the two limiting plates  22  is smaller than a width of the front frame  332 . 
         [0017]      FIG. 5  illustrates that the enclosure  50  can include a bottom plate  51  and four side plates  52  extending from four edges of the bottom plate  51 . The motherboard  55  is secured to the bottom plate  51 . A plurality of expansion cards  551 , such as graphics cards, is attached to the motherboard  55 . The side plate  52 , facing the heat sink  31 , defines a plurality of air outlets  521  for air flowing out of the enclosure  50 . 
         [0018]    Referring to  FIGS. 3-5 , during assembly, the fan  32  is secured to the fan case  33 , the rear frame  331  is secured to the heat sink  31 , and thus the cooling module  30  is assembled. The cooling module  30  is moved to contact the heat sink  31  to a heating component (not shown), and the fasteners  40  are secured to the motherboard  55  via the installation portions  311  to secure the cooling module  30  to the motherboard  55 . The cutout  23  is aligned to the front frame  332 . The air duct  100  is pressed towards the motherboard  55 , the resilient portion  121  is elastically deformed to allow the front frame  332  to move between the two limiting plates  22 . When the front frame  332  abuts the top plate  21 , the air duct  100  is released. The first guiding piece  221  and the second guiding piece  332  abut a rear surface of the front frame  332  between the front frame  332  and the rear frame  331 , the third guiding piece  333  and the mounting tabs  111  abut a front surface of the front frame  332 , and the resilient portions  121  exert elastic force to secure the air duct  100  to the front frame  332 . One of the two blocking plates  15  abuts the side plate  52  and is substantially perpendicular to the side plate  52 , and each expansion card  551  is located between the other one of the two blocking plates  15  and the side plate  52 , preventing air from flowing back to the ventilation hole  16  by the fan  32 , so that air from the cooling module  30  flows out of the enclosure  50  via the air outlets  521 . 
         [0019]    In disassembly, the operation portions  225  can be pressed to pull the air duct  100  away from the motherboard  55  to remove the air duct  100  from the cooling module  30 . 
         [0020]    Referring to  FIG. 5 , in operation, the fan  32  guides air to flow from the ventilation hole  16  into the cooling module  30  and then flow out of the enclosure  50  via the air outlets  521 . The blocking plates  15  prevent air from flowing back to the ventilation hole  16  by the fan  32 . 
         [0021]    The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of an air duct, cooling module, and electronic device. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including, the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.