Patent Publication Number: US-2007121293-A1

Title: Cooling module holder

Description:
FIELD OF THE INVENTION  
      The invention relates to an improved holder of a cooling module disposed at the CPU of electronic products, providing a practical structure with multiple effects in boosting pressure, guiding air flow, lowering noise, enhancing cooling performance.  
     BACKGROUND OF THE INVENTION  
      As shown in  FIG. 1 , a cooling module disposed at a CPU of a cooling module includes a heat sink  10 , a holder  20  and a cooling fan  30 . The heat sink  10  directly contacts with a heating element to absorb the heat thereof. The cooling fan  30  is fastened by the holder  20  and disposed atop the heat sink  10  to dissipate the heat.  
      The heat sink  10  includes a central heat conductor  11  and a plurality of cooling fins  12  extending outwardly from the periphery of the central heat conductor  11 .  
      The holder  20  has a main body  21  disposed a fan-positioning slot for assembling and fixing the cooling fan  30 . The main body is also disposed a ventilation hole  23  corresponding to the cooling fan  30 . A plurality of positioning parts  24  extend from the inner rim of the ventilation hole  23  to be engaged with the heat sink  10  by screws in formation of a cooling module. In addition, a plurality of feet  25  extend downwardly from the boundary of the main body  21  to be assembled with the cooling module on a specified position atop the heating element.  
      As a result, by directly contacting with and absorbing the heat from the heat sink and diffusing heat upwardly to the surrounding cooling fins  12 , the cooling fan  30  is used to simultaneously drive the air flow for quickly dissipating the heat.  
      However, when the heat absorbed by the heat sink  10  rises up from the bottom and gradually diffuses to the ambient environment, an anisothermal phenomenon results from the higher temperatures of the central heat conductor  11  and the lower half portion of the cooling fins as well as the lower temperature of the upper half portion. Under the premise changing no current specification and the surrounding configuration, should the issue of the anisothermal cooling fins be solved, the cooling performance can be enhanced only by increasing the wind volume and the wind pressure of the cooling fan  30  so as to further provide the faster and more efficient heat-dissipating effect against the overheated issue of the central heat conductor  11  and the lower half portion of the cooling fins  12 .  
     SUMMARY OF THE INVENTION  
      As shown in  FIG. 1 , the cooling module disposed for the CPU of the electronic product contains a heat sink  10 , a holder  20  and a cooling fan  30 . The heat sink  10  directly contacts with a heating element to absorb the heat thereof. The cooling fan  30  is fastened atop the heat sink  10  using the holder  20  to dissipate the heat.  
      The heat sink  10  contains a central heat conductor  11  and a plurality of cooling fins extending outwardly from the periphery of the central heat conductor  11 .  
      The holder  20  has a main body  21 . The main body  21  is disposed a fan-positioning slot  22  on the top side, allowing the cooling fan  30  to be assembled and fixed. The main body  21  is also disposed a ventilation hole  23  corresponding to the cooling fan  30 . A plurality of positioning parts  24  extending from the inner rim of the ventilation hole  23  can be engaged with the heat sink  10  by screws in formation of a cooling module. In addition, a plurality of feet  25  extend downwardly from the comers of the main body  21  to assemble the cooling module on a specified position atop the heating element.  
      Consequently, by directly contacting with and absorbing the heat from the heat sink and diffusing heat upwardly to the surrounding cooling fins  12 , the cooling fan  30  is used to simultaneously drive the air flow for quickly dissipating the heat.  
      However, when the heat absorbed by the heat sink  10  rises up from the bottom and gradually diffuses to the ambient environment, an anisothermal phenomenon results from the higher temperatures of the central heat conductor  11  and the lower half portion of the cooling fins as well as the lower temperature of the upper half portion. Under the premise changing no current specification and the surrounding configuration, should the issue of the anisothermal cooling fins be solved, the cooling performance can be enhanced only by increasing the wind volume and the wind pressure of the cooling fan  30  so as to further provide the faster and more efficient heat-dissipating effect against the overheated issue of the central heat conductor  11  and the lower half portion of the cooling fins  12 . 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is an exploded view showing the conventional structure of the cooling module structure;  
       FIG. 2  is an exploded view showing the first preferred embodiment of the present invention;  
       FIG. 3  is a cross-sectional view showing the first preferred embodiment of the present invention;  
       FIG. 4  is a plane schematic view showing the first preferred embodiment;  
       FIG. 5  is an exploded view showing the second preferred embodiment of the present invention;  
       FIG. 6  is a cross-sectional view showing the second preferred embodiment of the present invention; and  
       FIG. 7  is a plane schematic view showing the second preferred embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
      The invention relates to an improved cooling module holder including a heat sink  10 , a holder  20  and a cooling fan  30 . The heat sink  10  directly contacts with a heating element to absorb the heat thereof. The cooling fan is fastened and disposed atop the heat sink  10  with the holder  20  so as to dissipate the heat. There are two preferred embodiments illustrated below as examples.  
       FIG. 2  and  FIG. 3  illustrate the first preferred embodiment of the present invention. The heat sink  10  contains  1  central heat conductor  11  and a plurality of cooling fins  12  extending outwardly from the periphery of the central heat conductor  11 .  
      The holder  20  has a main body  21  disposed a fan-positioning slot  22  on the top side for assembling and fixing the cooling fan  30  and a ventilation hole  23  corresponding to the cooling fan  30 . A plurality of positioning parts  24  extend from the inner rim of the ventilation hole  23  are engaged with the heat sink  10  by screws in formation of a cooling module. In addition, a plurality of feet  25  extend downwardly from the boundary of the main body  21  to be assembled with the cooling module on a specified position atop the heating element.  
      Besides, a plurality of still blades  26  extending inwardly from the inner rim of the ventilation hole of the holder  20 . The still blades are in form of a plate having an angle of tilt or a pattern similar to the blade of the cooling fan  30 .  
      Together with the illustration of  FIG. 2, 3  and  4 , when the cooling fan  30  drives an air flow to pass through those still blades  26 , the still blades  26  function to guide the air flow so as to alleviate the noise arising from the resonance done by the pressure. Furthermore, a wind pressure is formed along the tangent direction of the still blade  26 , possibly avoiding the wind pressure loss caused by the turbulence of the air flow on the one hand and enhancing the cooling performance of the cooling fan  30  by means of the wind pressure on the other hand. The heat absorbed by the heat sink  10  can be swiftly dissipated to attain faster and more efficient cooling effect.  
       FIG. 5  and  FIG. 6  illustrate the second preferred embodiment of the present invention. The inner rim of the ventilation hole  23  of the holder  20  is disposed a plurality of still blades  27  extending inwardly. Those still blades  27  are in form of plate having an angle of tilt or the pattern similar to the blades  30  of the cooling fan  30 . The still blades  27  of the second preferred embodiment are longer than the still blades of the first embodiment, and the inner side of each still blade  27  is connected with a fixing ring  28 .  
      Together with the reference to  FIGS. 5, 6  and  7 , when the cooling fan drives the air flow to pass through those blades  27 , the still blades  27  function similarly to guide the air flow so as to alleviate the noise arising from the resonance done by the pressure. The design of the fixing ring  28  provides the sufficient strength of each still blade  27  so as to prevent the still blade from generating resonance or vibration due to the wind pressure effect. Moreover, a gust of wind pressure is formed additionally along the tangent direction. On the one hand, the loss of wind pressure resulting from the turbulence of air flow is avoided, and on the other hand, the cooling performance of the cooling fan  30  is improved by means of the wind pressure so that the heat absorbed by the heat sink  10  can be swiftly dissipated to attain faster and more efficient cooling effect.  
      In sum, the present invention utilizes a plurality of still blades extending from the inner rim of the ventilation hole of the holder to firstly guide the air flow for reducing the noise generated by the resonance done by the pressure and to secondly form a gust of wind pressure, avoiding the loss of wind pressure generated by the turbulence of air flow. Moreover, the entire cooling performance is enhanced by means of the wind pressure, achieving faster and more efficient cooling effect. Therefore, the present invention not only has a novelty and a progressiveness, but also has an industry utility.  
      While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims, which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.