Abstract:
A heat dissipation module comprises a heat pipe forming a condensing section, and a first fin unit and a second fin unit contacting with the condensing section of the heat pipe. The first and second fin units are located neighboring to each other and have different heights. The first and second fin units each comprise a plurality of fins stacked together. A protruding member protrudes from one of the fins of one of the first and second fin units to abut a corresponding neighboring one of the fins of the other one of the first and second fin units, to thereby separate the first fin unit and the second fin unit to limit relative movement of the first fin unit and the second fin unit in a protruding direction of the protruding member.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates to heat dissipation modules, and particularly to a heat dissipation module which can be assembled easily. 
         [0003]    2. Description of Related Art 
         [0004]    With continuing development of electronic technology, heat-generating electronic components such as CPUs (central processing units) are generating more and more heat which requires immediate dissipation. Generally, heat dissipation modules are attached to the electronic components to provide such dissipation. A conventional heat dissipation module includes a fin unit, a heat pipe and a cooling fan. The heat pipe connects the electronic component with the fin unit to transfer heat from the electronic component to the fin unit. The cooling fan defines an air outlet facing the fin unit to provide forced airflow to cool the fin unit. However, the fin unit generally has a plurality of fins with different sizes for mounting to different portions of the air outlet. Assembly of the heat dissipation module is thus complex and inconvenient. 
         [0005]    Therefore, a heat dissipation module is desired to overcome the above described shortcoming. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]      FIG. 1  is an assembled, isometric view of a heat dissipation module in accordance with a first embodiment. 
           [0007]      FIG. 2  is a front side view of the heat dissipation module of  FIG. 1 , with a cooling fan thereof being omitted. 
           [0008]      FIG. 3  is an isometric view of a leftmost fin of a first fin unit of the heat dissipation module of  FIG. 1 . 
           [0009]      FIG. 4  is similar to  FIG. 2 , but shows a heat dissipation module in accordance with a second embodiment. 
       
    
    
     DETAILED DESCRIPTION 
       [0010]      FIG. 1  shows a heat dissipation module  10  in accordance with a first embodiment of the present disclosure. The heat dissipation module  10  includes a cooling fan  11 , a heat pipe  12 , a first fin unit  13  and a second fin unit  15 . 
         [0011]    The cooling fan  11  includes a top wall  110 , a bottom wall  111  and a sidewall  113  interconnecting the top wall  110  and the bottom wall  111 . The cooling fan  11  defines an air inlet  112  at the top wall  110  and an air outlet  114  at the sidewall  113  perpendicular to the air inlet  112 . The heat pipe  12  is flat, including a planar top surface  121  and a planar bottom surface  122 . The heat pipe  12  includes an evaporating section  124  for absorbing heat from electronic components, and a condensing section  123  located at a top side of the air outlet  114  of the cooling fan  11 . The condensing section  123  of the heat pipe  12  is parallel to the air outlet  114  of the cooling fan  11 . 
         [0012]    The first and second fin units  13 ,  15  are located at the air outlet  114  of the cooling fan  11  and have top sides thereof connecting with the bottom surface  122  of the condensing section  123  of the heat pipe  12 . The first fin unit  13  is located at a right portion of the air outlet  114  of the cooling fan  11  in which the airflow has a relatively high speed. The second fin unit  15  is located at a left portion of the air outlet  114  of the cooling fan  11  in which the airflow has a relatively low speed. The second fin unit  15  is connected to a left side of the first fin unit  13 . The second fin unit  15  has a height in an axial direction of the cooling fan  11  smaller than that of the first fin unit  13 . The top side of the first fin unit  13  is coplanar with the top side of the second fin unit  15 , whilst a bottom side of the first fin unit  13  is lower than a bottom side of the second fin unit  15 . 
         [0013]    Referring to  FIG. 2 , the first fin unit  13  comprises a plurality of parallel fins  14  stacked together along the condensing section  123  of the heat pipe  12 . Each of the fins  14  includes a main body  140 , and top and bottom flanges  141 ,  142  respectively extending leftward from top and bottom edges of the main body  140 . The top and bottom flanges  141 ,  142  of each fin  14  of the first fin unit  13  are integrally formed with the main body  140 . The top and bottom flanges  141 ,  142  of each fin  14  of the first fin unit  13 , except a leftmost fin  14   c,  abut the main body  140  of a neighboring left fin  14 , and thus an air passage  17  is defined between every two neighboring fins  14  of the first fin unit  13 . The top flanges  141  of the fins  14  cooperatively form a planar upper surface  148  at the top side of the first fin unit  13 . The bottom flanges  142  of the fins  14  cooperatively form a planar lower surface  149  at the bottom side of the first fin unit  13 . 
         [0014]    Referring to  FIG. 3 , the main body  140  of the leftmost fin  14   c  of the first fin unit  13  forms a protruding member  143  at a central portion thereof by punching. The protruding member  143  protrudes leftward with a length in a protruding direction equaling to a length of each of the top and bottom flanges  141 ,  142  of the leftmost fin  14   c  of the first fin unit  13 . The protruding member  143  includes a base  144  and a pair of side flanges  145 . The base  144  is substantially rectangular and located at a left side of the main body  140  of the leftmost fin  14   c  of the first fin unit  13 . The base  144  is spaced from and parallel to the main body  140  of the leftmost fin  14   c.  The side flanges  145  connect top and bottom sides of the base  144  with the main body  140  of the leftmost fin  14   c  of the first fin unit  13 . 
         [0015]    The second fin unit  15  is similar to the first fin unit  13 . The second fin unit  15  includes plural fins  16  stacked together along the condensing section  123  of the heat pipe  12 . The fins  16  of the second fin unit  15  each include a main body  160 , and top and bottom flanges  161 ,  162  extending leftward from top and bottom edges of the main body  160 . The top and bottom flanges  161 ,  162  of each fin  16  of the second fin unit  15  abut the main body  160  of a neighboring left fin  16 , and thus every two neighboring fins  16  of the second fin unit  15  cooperatively define an air passage  19  therebetween. The top flanges  161  of the fins  16  cooperatively form a planar upper surface  168  at the top side of the second fin unit  15 . The bottom flanges  162  of the fins  16  cooperatively form a planar lower surface  169  at the bottom side of the second fin unit  15 . 
         [0016]    When assembled, the top surface  168  of the second fin unit  15  and the top surface  148  of the first fin unit  13  are connected to the bottom surface  122  of the heat pipe  12  at the condensing section  123 . The second fin unit  15  is located at a left side of the first fin unit  13 . The lower surface  169  of the second fin unit  15  is higher than the lower surface  149  of the first fin unit  13 , and is substantially aligned with a middle portion of the first fin unit  13 . 
         [0017]    The leftmost fin  14   c  of the first fin unit  13  is located adjacent to a rightmost fin  16   c  of the second fin unit  15  with the top flange  141  of the leftmost fin  14   c  of the first fin unit  13  abutting a top end of the main body  160  of the rightmost fin  16   c  of the second fin unit  15 . The base  144  of the protruding member  143  of the leftmost fin  14   c  abuts the main body  160  of the rightmost fin  16   c  of the second fin unit  15 , to thereby separate the leftmost fin  14   c  of the first fin unit  13  and the rightmost fin  16   c  of the second fin unit  15  with a predetermined distance, and thus a space  147  is formed between the main bodies  140 ,  160  of the leftmost fin  14   c  of the first fin unit  13  and the rightmost fin  16   c  of the second fin unit  15 . 
         [0018]    During operation, the evaporating section  124  of the heat pipe  12  receives heat from electronic components and transfers the heat to the condensing section  123 , and then to the first and second fin units  13 ,  15  such that air in the air passages  17 ,  19  is heated. The cooling fan  11  generates forced airflow to blow away the heated air in the air passages  17 ,  19  of the first and second fin units  13 ,  15 . 
         [0019]    Since the protruding member  143  of the leftmost fin  14   c  of the first fin unit  13  separates the leftmost fin  14   c  of the first fin unit  13  and the rightmost fin  16   c  of the second fin unit  15 , the rightmost fin  16   c  of the second fin unit  15  is kept from the first fin unit  13  a constant distance, and thus a total length of the first and second fin units  13 ,  15  would not decrease. Furthermore, the top flange  161  of the rightmost fin  16   c  of the second fin unit  15  would not move to a position under the top flange  141  of the leftmost fin  14   c  of the first fin unit  13 , to thereby assure a position of the second fin unit  15  to be always correctly located. Accordingly, assembly of the second fin unit  15  and the heat pipe  12  can be conveniently proceeded, and a good contact of the condensing section  123  of the heat pipe  12  and the top flanges  141  of the second fin unit  15  can be achieved to enhance heat conduction therebetween. Moreover, the space  147  maintained between the main bodies  140 ,  160  of the leftmost fin  14   c  of the first fin unit  13  and the rightmost fin  16   c  of the second fin unit  16   c  allows the forced airflow flowing therethrough, whereby heat of the leftmost fin  14   c  and the rightmost fin  16   c  can be taken away timely. 
         [0020]      FIG. 4  shows a heat dissipation module  20  in accordance with an alternative embodiment of the present disclosure. The heat dissipation module  20  differs from the heat dissipation module  10  of the previous embodiment only in that a protruding member  263  is formed on a main body  260  of a rightmost fin  26   c  of a second fin unit  25 . The protruding member  263  extends rightward from the main body  260  of the rightmost fin  26   c  of the second fin unit  25  to abut a main body  240  of the leftmost fin  24   c  of the first fin unit  23 . A shape of the protruding member  263  is similar to that of the protruding member  243  of the heat dissipation module  10  of the previous embodiment. A length of the protruding member  263  in a protruding direction equals to a length of a top flange  241  of the leftmost fin  24   c  of the first fin unit  23 . 
         [0021]    It is to be understood, however, that even though numerous characteristics and advantages of the disclosure 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 detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.