Patent Publication Number: US-2013233528-A1

Title: Heat dissipating assembly

Description:
BACKGROUND  
     1. Technical Field 
     The present disclosure relates to heat dissipating assemblies, and particularly to a heat dissipating assembly with a heat exchanger. 
     2. Description of Related Art 
     Electronic devices generate heat during operation. Electronic components in electronic devices may overheat and become damaged if the heat is not dissipated quickly. Fans and heat exchangers are used to draw heat away from the electronic components. Generally, a heat exchanger includes a base adhered to an electronic component (such as CPU) and a plurality of fins extending from the base. The plurality of fins are perpendicularly formed from the base which may increase cost. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
       Many aspects of the embodiments can be better understood with references 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. 
         FIG. 1  is an assembled, isometric view of an embodiment of a heat dissipating assembly. 
         FIG. 2  is an exploded, isometric view of  FIG. 1 . 
         FIG. 3  is an isometric view of a heat exchanger of  FIG. 2 . 
         FIG. 4  is an enlarged view of a circled portion IV of  FIG. 3 . 
         FIG. 5  is an exploded view of a first fin and a second fin of  FIG. 3 . 
     
    
    
     DETAILED DESCRIPTION  
     The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. 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 a heat dissipating assembly in accordance with an embodiment. The heat dissipating assembly includes two seats  10 , a base  20 , a heat exchanger  30 , and two pipes  50 . 
     The two seats  10  are secured to a motherboard (not shown). Each of the two seats  10  includes a supporting portion  11  and two securing tabs  13 , extending from two opposite ends of the supporting portion  11 . The supporting portion  11  defines two positioning holes  111  corresponding to the base  20 . Four securing members  15  are located on each securing tab  13 , to secure the two seats  10  to the motherboard. 
     The base  20  includes a board  21 . Three elongated latching posts  23  protruding from an upper surface of the board  21 . The three latching posts  23  are parallel to each other, to engage with the heat exchanger  30 . Each of the three latching posts  23  has a first extending direction, and each of the first extending directions are parallel to each other. Each of the three latching posts  23  includes a neck portion  231  and a head portion  233 , connected to the neck portion  231 . A size of the head portion  233  is greater than a size of the neck portion  231 . The board  21  defines four installation holes  211  corresponding to the two positioning holes of each of the two seats  10 . Two receiving slots  25  are defined in the board  21 , for receiving the two pipes  50 . The two receiving slots  25  are positioned in a lower portion of the board  21  and parallel to each other. 
     Referring to  FIGS. 4-5 , the heat exchanger  30  includes a first fin  31  and a plurality of parallel second fins  33 . Each of the first fins  31  and the second fins  33  includes a fin body  311 , a first flange  313 , and a second flange  314 . The first flange  313  and the second flange  314  extend from two opposite edges of the fin body  311 . The first flange  313  and the second flange  314  are substantially parallel to each other and perpendicular to the fin body  311 . The fin body  311  defines three latching slots  315  extending to the first flange  313 , corresponding to the three latching posts  23 . Each of the latching slots  315  includes a narrow portion  3151  and a wide portion  3153 , in communication with the narrow portion  3151 . A size of the wide portion  3153  is greater than a size of the narrow portion  3151 , but it is smaller than the size of the head portion  233 . A touching piece  316  (shown in  FIG. 5 ), surrounding each latching slot  315 , is located on the fin body  311 . The touching piece  316  connects to the first flange  313 . Each of the first flange  313  and the second flange  314  defines two cutouts  3131  extending to the fin body  311 . Two engaging portions  331  are located on each of the first flange  313  and the second flange  314  of each second fin  33 . Each engaging portion  331  is positioned in front of each cutout  3131 . In one embodiment, each engaging portion  331  is made of plastic. 
     Each of the two pipes  50  includes a heat conducting portion  51 , a heat dissipating portion  53 , and a connecting portion  55 , connecting the heat conducting portion  51  with the heat dissipating portion  53 . The heat dissipating portion  53  is inserted into the heat exchanger  30 , and the heat conducting portion  51  is received in each receiving slot  25 . 
       FIGS. 1 and 3  show that in assembly, each engaging portion  331  of one of the second fins  33  is engaged into each cutout  3131  of the first fin  31 , to secure the one of the second fins  33  to the first fin  31 . The other of the second fins  33  are connected one by one using the same way. The heat exchanger  30  is thereby assembled. The first fin  31  and the plurality of second fins  33  cooperatively define three elongated latching slots  315  corresponding to the three latching post  23 . Each of the three latching slots  315  has a second extending direction, and the second extending directions are parallel to each other and parallel to the first extending direction. 
     The base  20  is secured to the two seats  10  via four locking members  40 . The heat exchanger  30  is moved towards the base  20 . Each head portion  233  of the three latching posts  23  is inserted into each narrow portion  3151  to deform the fin body  311 , until the head portion  233  is engaged into the wide portion  3153 . The fin body  311  resiliently rebounds to engage the touching piece  316  with each neck portion  231 , to secure the heat exchanger  30  to the base  20 . The touching piece  316  abuts the corresponding latching post  23  in a direction substantially perpendicular to the extending direction, to dissipating heat from the base  20 . The first flange  313  of the heat exchanger  30  abuts the board  21  of the base  20 . 
     In disassembly, the heat exchanger  30  is pulled away from the base  20 . The touching piece  316  is resiliently deformable to disengage the head portion  233  from the latching slot  315 , to detach the heat exchanger  30 . 
     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 present disclosure, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.