Abstract:
An electrostatic air-cooled heat sink has a frame, a power controller, a sharp electrode with a sharp electrode portion, a through-hole, a guide frame, a half-bowl blunt electrode assembly and flow-through portion. The electrostatic air-cooled heat sink features a simple and lightweight structure, making it suitable for mass production and beat radiation with better applicability and industrial benefits.

Description:
CROSS-REFERENCE TO RELATED U.S. APPLICATIONS 
       [0001]    Not applicable. 
       STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
       [0002]    Not applicable. 
       NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENT  Not applicable. 
     REFERENCE TO AN APPENDIX SUBMITTED ON COMPACT DISC 
       [0003]    Not applicable. 
       BACKGROUND OF THE INVENTION 
       [0004]    1. Field of the Invention 
         [0005]    The present invention relates generally to a heat sink, and more particularly to an innovative electrostatic air-cooled beat sink. 
         [0006]    2. Description of Related Art including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98 
         [0007]    Currently, the common heat sink is operated in a manner wherein a mechanical fan is rotated to generate air flow. for heat radiation, or a heat tube with phase-change working liquid is used for heat radiation. Moreover, electrostatic air is used to generate air flow for heat radiation. According to the operating principle of such a heat sink, one or multiple sharp electrodes (or corona electrodes) and blunt electrodes (or neutral electrodes) are arranged correspondingly on the structure, The electric field generated by said sharp and blunt electrodes will lead to crash of a part of air flow dose to the sharp electrodes, which is generally referred to as corona discharge. In case of a corona discharge, ions may be generated and attracted to the blunt electrodes. In this process, the collision of the icons and neutral air molecules will generate air flow similar to that caused by a mechanical fan, so heat radiation effect could be yielded through channeling of air flow. Improvement of the present invention is thus made on such an electrostatic air-cooled heat sink structure. 
         [0008]    Thus, to overcome the aforementioned problems oldie prior art, it would be an advancement if the art to provide an improved structure that can significantly improve the efficacy. 
         [0009]    Therefore, the inventor has provided the present invention of practicability after deliberate design and evaluation based on years of experience in the production, development and design of related products. 
       BRIEF SUMMARY OF THE INVENTION 
       [0010]    The present invention comprises: a frame, power controller, sharp electrode with sharp electrode portion, through-hole, guide frame, half-howl blunt electrode assembly and flow-through portion, the electrostatic air-cooled heat sink features simple and lightweight structure, making it suitable for mass production and beat radiation with better applicability and industrial benefits. 
         [0011]    Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0012]      FIG. 1  is an assembled perspective view of the preferred embodiment of the present invention. 
           [0013]      FIG. 2  is an exploded perspective view of the preferred embodiment of the present invention. 
           [0014]      FIG. 3  is an exploded sectional view of the preferred embodiment of the present invention. 
           [0015]      FIG. 4  is an assembled sectional view of the preferred embodiment of the present invention. 
           [0016]      FIG. 5  is another assembled sectional view of the preferred embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0017]      FIGS. 1-5  depict preferred embodiments of the electrostatic air-cooled heat sink of the present invention, which, however, are provided for only explanatory objective for patent claims. 
         [0018]    Said electrostatic air-cooled heat sink A includes a frame  10 , made of solid insulating materials (e.g. plastics) to form a hollow framework, comprising of a first opening  11 , a second opening  12  and a holding space  13  located between the first opening  11  and second opening  12 . 
         [0019]    A power controller  20  is assembled onto the frame  10  for controlling the power supply state. 
         [0020]    A sharp electrode  30  is made of conducting materials and integrally located at the first opening  11  of the frame  10 . Said sharp electrode  30  is provided with at least a sharp electrode portion  31 , which is folded and protruded towards the holding space  13 . A first power feed portion  32  is set on the sharp electrode  30  and electrically connected with the power controller  20 . 
         [0021]    At least one through-hole  33  is formed correspondingly to the sharp electrode portions  31  of the sharp electrode  30 . Ribs  34  are formed at periphery of said through-hole  33 . 
         [0022]    A guide frame  40  is assembled into the holding space  13  of the frame  10 . Made of conducting materials, the guide frame  40  is provided with guide plates  41  arranged at interval. A guide channel  42  is formed between the guide plates  41 , and both ends of the guide channels  42  are oriented separately towards the first opening  11  and second opening  12  of the frame  10 . One end of the guide channel  42  facing the first opening  11  is located opposite to the sharp electrode portion  31  of the sharp electrode  30 . Moreover, insulating configuration between the guide frame  40  and sharp electrode  30  is required. Besides, a second power feed portion  43  is set onto the guide frame  40  (only marked in  FIG. 2 ) and electrically connected with the power controller  20 . 
         [0023]    A half-howl blunt electrode assembly  50  is set onto the guide plate  41  of the guide frame  40  in a manner that at least a half-bowl blunt electrode unit  51  is integrally formed at one end of the guide plate  41  facing the first opening  11 , and the other half-bowl blunt electrode unit  52  is formed correspondingly to the guide plate  41 . So, said half-bowl blunt electrode assembly  50  consist of these two half-bowl blunt electrode units  51 ,  52  set at interval. 
         [0024]    A flow-through portion  53  is formed by a space set between two half-bowl blunt electrode units  51 ,  52 . Said flow-through portion  53  must be connected with the guide channel  42  between the guide plates  41  as well as the through-hole  33  formed by the sharp electrode  30 . 
         [0025]    Of which, the end of the sharp electrode portion  31  formed by the sharp electrode  30  is located correspondingly to the center of the half-bowl blunt electrode assembly  50 , and a spacing is kept between two half-bowl blunt electrode units  51 ,  52  (indicated by arrow L 1  in  FIG. 5 ). 
         [0026]    Of which, the first power feed portion  32  on the sharp electrode  30  and the second power feed portion  43  on the guide frame  40  are of a flanged pattern, and also protruded laterally at opposite position (e.g. left and tight sides). 
         [0027]    Referring to  FIGS. 1 and 2 , the sharp electrode  30  is made of metal plate, and sharp electrode portion  31  is made of a triangular plate formed by partially punching into a folding pattern. Besides, the sharp electrode is of a plate-like metal mesh pattern, and the sharp electrode portion is of a spike structure formed by folding of the metal mesh unit (note: drawing omitted hereto). 
         [0028]    Referring to  FIGS. 1 and 2 , the through-holes  33  formed by the sharp electrode  30  are of a square or rectangular pattern, while the ribs  34  are of a pigsty or mesh pattern. 
         [0029]    Of which, the electrostatic air-cooled heat sink A is arranged dose to an existing heating source (e.g. CPU) or thermal conductive device (e.g. soaking plate and heat tube), so as to yield air exhaust and heat radiation effect without need of exhaust fan. 
         [0030]    Based on above-specified structural design, the electrostatic air-cooled heat sink A of the present invention is operated as shown in  FIG. 5 , wherein the sharp electrode portion  31  of sharp electrode  30  and half-bowl blunt electrode assembly  50  on the guide plate  41  of the guide frame  40  are in an energized state with the help of power controller  20 . In such a case, the electric field generated by the sharp electrode portion  31  and half-bowl blunt electrode assembly  50  will lead to crash of some air close to the sharp electrode portion  31  (indicated by arrow L 2 ). The electric discharge will generate ions, which will be absorbed to the blunt electrodes (indicated by arrow L 3 ). In this process, air flow will be generated by the collision between ions and neutral air molecules similar to the effect of mechanical fan (indicated by arrow L 4 ). Then, the air flow can be discharged along the guide channel  42  formed between the guide plates  41  of the guide flame  40 . When air in the guide channel  42  is discharged, a suction force will be generated. In such a case, the through-hole  33  opened on the sharp electrode  30  can absorb external air into the guide channel  42  (indicated by arrow L 5 ), bringing about air discharge and heat radiation effect (note: either the electric discharge or air flow state is indicated by arrow in  FIG. 5 , but in fact either one is operated simultaneously). Hence, if the electrostatic air-cooled heat sink A of the present invention is installed onto the wall of an equipment requiring for heat radiation, a cooling structure without mechanical fan and heat tube could be realized. As compared with prior art, the sharp electrode  30  of the electrostatic air-cooled heat sink of the present invention could be made by punching of individual metal plates or by metal meshes. Moreover, the guide frame  40 , guide plate  41 , half-bowl blunt electrode assembly  50  and flow-through portion  53  can be fabricated rapidly by folding, punching and welding of the metal plates, while the frame  10  can be made rapidly by injection molding of plastics. It is thus learnt that, the electrostatic air-cooled heat sink A of the present invention of a simple structure is particularly suitable for mass production and cost reduction, and the plate-like structure is of a satisfactory lightweight structure. As for the guided air exhaust effect, since the half-bowl blunt electrode assembly  50  is directly assembled onto the guide plate  41  of the guide frame  40 , the flow-through portion  53  formed by the space between two half-bowl blunt electrode units  51 ,  52  is connected to the guide channel  42  between the guide plates  41  as well as the through-hole  33  formed by the sharp electrode  30 . Hence, air flow channel is straight and smooth, and air flow can reach optimum efficiency and flow status for better heat radiation effect.