Abstract:
An electric power free fan can not only reduce electricity consumption can also increase the cooling effects, it guides the air flow which comes from the DC cooling fan to impel one or more electric power free fans, it can use electric power free fans to blow and exhaust the hot air to increase the cooling effect.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Technical Field 
         [0002]    The present invention relates to an electric power free fan can not only reduce electricity consumption can also increase the cooling effects, it guides the air flow which comes from the DC cooling fan to impel one or more electric power free fans, by this way, it can use electric power free fans to blow and exhaust the hot air to increase the cooling effect but can reduce the needs for DC cooling fans. 
         [0003]    2. Description of Related Art 
         [0004]    In recent years, there are many new creative electrics; communication products which make consumers can get better and more efficient products. All these are made possible by the continuous efforts of engineers from various fields; computer products are especially playing a representative role among all kinds of consumer electric products. 
         [0005]    Most computer or electric devices have contained components which will generate or keep heats, or it will make the system get hot due to execute works. The most popular way to cool the system is by installing one or more DC cooling fans in the system, to reduce the heat by the air flow coming from DC fan(s). 
         [0006]    Although above mentioned cooling method can solve the heating problem, however it needs to install many DC fans which require electricity to work. Today, protecting our environment makes saving energy an important issue to everybody, any methods to reduce the waste of electricity are better direction and meet the needs to protect our environments. 
         [0007]    There are several components in the general computer system and electric products, such as CPU, electro-coil, transformers, power supplies or Hard Discs and etc., In order to cool down the system, it needs to have one or more electricity consuming DC cooling fan to be installed in the system. 
         [0008]    By doing this, it may help to cool the system. However, it also increases the burden of the power supply and power system and make more heating generator. Obviously, it is not an idea solution and can not solve the heating problem efficiently. 
         [0009]    By realization the serious shortage of the traditional cooling device and system, the inventor of this electric power free fan made many studies and researches finally create this revolutionary and practical cooling idea. The theory is that using and guiding the air for the DC cooling fan to impel one or more electric power free fan(s). The cooling air comes from the DC cooling fan still can execute its original cooling function, in the meantime, it can impel the electric power free fan to work thus to increase the volume of air blow and ventilation. By this kind operation, it can increase the cooling effect and reduce the use of DC fan which will induce the heat source. 
       SUMMARY OF THE INVENTION 
       [0010]    This present invention is a cooling fan device which does not need electric power to start, it is particularly suitable to use in power supply, computer chassis and computer server system in order to reduce the thermal and enhance the cooling effects. 
         [0011]    The special feature is to use the air from the DC cooling fan to impel one or more electric power free fan. By this way, the needs for the DC cooling fans can be reduced to least, but can use the electric power free fan to help on air ventilation to increase the cooling effect 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0012]    The invention, as well as a preferred mode of use, further objectives and advantages, will best be understood by referring to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein: 
           [0013]      FIG. 1  is the three dimensional drawing to show this invention of airflow guiding duct and DC cooling fan individually. 
           [0014]      FIG. 2  is the three dimensional drawing to show the invention of airflow guiding duct and DC cooling fan combined together. 
           [0015]      FIG. 3  is the three dimensional drawing to show the invention of electric power free fan. 
           [0016]      FIG. 4  is a three dimensional drawing to how the example of connecting the invention of electric power free cooling fan and DC cooling Fan. 
           [0017]      FIG. 5  is a diagram to show the implementation of this invention on computer power supply. 
           [0018]      FIG. 6  is another diagram to show the implementation of this invention on computer power supply. 
           [0019]      FIG. 7  is another diagram to show the implementation of this invention on computer power supply. 
           [0020]      FIG. 8  is a diagram to show the implementation of this invention on computer chassis. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0021]    Please refer to  FIGS. 1 , this invention of electronic power free fan auxiliary cooling device primarily comprises following stated parts: one airflow guiding duct  2  which can be attached on a DC cooling fan  1 , one or more than one airflow guiding pipe  3  and one or more than one electronic power free fan  4 . 
         [0022]    Above mentioned airflow guiding duct  2 , having screw holes  21  and one or more than one airflow channel&#39;s tube connectors  22 ,  23 ,  24  &amp;  25  on it and forms a bell shape opening mouth  26  with the jointing side of the DC cooling fan  26 . 
         [0023]    Please refer to  FIGS. 2 , the airflow guiding duct  2  cab be overlapped with the DC cooling fan  1  by the screw hole on the airflow guiding duct  21  and screw hole on the DC cooling fan  11 , by fastening the screw  12  to the DC cooling fan  1 , it can make the airflow guiding duct  2  fastens with the DC cooling fan  1 . 
         [0024]    By the Bell shaped opening mouth  26  on the airflow guiding duct  2 , it can direct some air of the DC cooling fan  1  to the airflow channel&#39;s tube connectors  22 ,  23 ,  24  &amp;  25 . 
         [0025]    The above mentioned way to fasten the airflow guiding duct  2  with DC cooling fan  1 , not only limited to above stated screw holes  21  to work for the fastening, it includes fasten by hooks or other ways. 
         [0026]    Please refer to  FIGS. 3 , the electric power free cooling fan  4  for this electric power free auxiliary cooling device, on the frame there is one oblique panel  41  which is used to impel the fan blade&#39;s in proper angle, there is one tube connecting pipe or fastener  42  on oblique panel  41 . 
         [0027]    The connecting pipe or fastener on the above stated oblique panel  41 , not limited on the tube type connecting pipe which is adopted in this invention, any thing which can position or fasten one side of the airflow guiding pipe  3  will be included. 
         [0028]    Please refer to  FIGS. 4 , the airflow guiding pipe  3  in this electronic power free fan auxiliary device invention, one side of the airflow guiding duct  2  attaches to any airflow channel&#39;s tube connectors  22 ,  23 ,  24  &amp;  25 , the other side attaches or fixes on connecting pipe of fastener  42  which is on the oblique panel  41  of electronic power free fan  4 . 
         [0029]    By above statement , when the DC cooling fan  1  is operating, part of air will be guided through the middle of airflow guiding duct  2  and airflow guiding pipe  3  to impel electronic power free fan  4  to run and can blow air to cool the designated heat generator or exhaust the hot hair in that environment area to outside of the chassis. In the meantime, it will not affect cooling function of the DC cooling Fan  1 . 
         [0030]    Please refer to  FIGS. 5  to  FIGS. 7 , they demonstrate this invention&#39;s implementing example in the computer power supply. Fix the airflow guiding duct  2  to the DC cooling fan  1  which is originally installed in the power supply  5 , then fix the electronic power free cooling fan  4  on or near the inner side of the power supply  5  casing, and connects one side of the airflow guiding pipe  3  to any of the airflow channel&#39;s tube connectors  22 ,  23 ,  24  &amp;  25  which are on the airflow guiding duct  2 , the other side is fixing or connecting to the connecting pipe or fastener  42  on the oblique panel  41  which is on electric power free fan  4 . 
         [0031]    Please refer to  FIGS. 8 , it demonstrates the implementing example, it fixes the airflow duct  2  to the DC cooling fan  1  which is originally installed in the computer chassis, then fixes one or more than one electric power free cooling fan  4  on or near to the inside of the rear or side panels of the computer chassis. It can also be fixed to the designated surrounding heat generator devices, such as Hard Disc, CPU heat sink or electro-coils, connect required numbers of airflow guiding pipes  3  to the airflow channel&#39;s tube connectors  22 ,  23 ,  24  &amp;  25  which are one the airflow guiding duct  2  the other side is fixing or connecting to the connecting pipe or fastener  42  on the oblique panel  41  which is on electric power free fan  4 . 
         [0032]    Combined all above statements, this invention of electric power free auxiliary cooling device can take advantage of the DC cooling fan  1  which is originally installed on the computer power supply  5  or computer chassis  6  to guide the airflow to airflow guiding pipe  3  to impel one or more than one electric power free fan  4 . 
         [0033]    By this operation, It will not reduce the cooling function of original DC cooling fan  1 , but it can minimize the needs for DC cooling fan  1  and start the electric power free cooling fan to help blow and exhaust air to enhance cooling effects. Obviously, it can decrease the numbers of installing DC cooling fan  1 . It can reduce the usage of electricity and help on environment protection.