Abstract:
An auxiliary fan that can reduce electricity consumption and increase cooling effects. Air flow which comes from a DC cooling fan is guided to impel one or more auxiliary fans. The auxiliary fans blow and exhaust hot air to increase cooling effects.

Description:
BACKGROUND OF THE INVENTION 
     1. Technical Field 
     The invention relates to an auxiliary fan that can not only reduce electricity consumption can also increase cooling effects. The invention guides air flow which comes from a DC cooling fan to impel one or more auxiliary fans. The auxiliary fan(s) can blow and exhaust hot air to increase cooling effects and can reduce the need for DC cooling fans. 
     2. Description of Related Art 
     In recent years, there are many new creative electronics. Communication products offer consumers better and more efficient products. These are made possible by the continuous efforts of engineers from various fields. Computer products play a representative role among all kinds of consumer electric products. 
     Most computer or electric devices contain components which will generate or keep heat. A system can get hot due to executed work. The most popular way to cool a system is by installing one or more DC cooling fans in the system to reduce heat by the air flow coming from DC fan(s). 
     Although the above mentioned cooling method can solve the heating problem, DC fans require electricity to work. Today, protecting our environment makes saving energy an important issue. Methods to reduce the waste of electricity meet the need to protect our environment. 
     There are several components in general computer systems and electric products, such as CPU, electro-coil, transformers, power supplies, Hard Discs, etc. In order to cool down the system, one or more electricity consuming DC cooling fan need to be installed in the system. 
     By doing this, the system is cooled. However, it also increases the burden of the power supply and power system and makes more heat. Obviously, it is not an idea solution and can not solve the heating problem efficiently. 
     By realization of the serious shortcomings of the traditional cooling devices and systems, the inventor made many studies and researches and finally created a revolutionary and practical cooling idea. The theory is using and guiding air from the DC cooling fan to impel one or more auxiliary fan(s). The cooling air coming from the DC cooling fan can execute its original cooling function. In addition, the DC cooling fan can impel the auxiliary fan(s) to work to increase the volume of air blown. By this operation, increased cooling effect and reduced use of DC fans will reduce heat. 
     SUMMARY OF THE INVENTION 
     This invention is a cooling fan device which does not directly need electric power. The auxiliary fan is particularly suitable to use in power supply, computer chassis and computer server systems in order to reduce temperatures and enhance cooling effects. 
     A special feature is to use the air from a DC cooling fan to impel one or more auxiliary fans. By this way, the need for DC cooling fans can be reduced and the auxiliary fan helps ventilation to increase cooling effects. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       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: 
         FIG. 1  is a perspective view to show this invention of an airflow guiding duct and DC cooling fan individually. 
         FIG. 2  is a perspective view to show the invention of an airflow guiding duct and DC cooling fan combined together. 
         FIG. 3  is a perspective view to show the invention of auxiliary fan. 
         FIG. 4  is a perspective view to how the example of connecting the invention of auxiliary cooling fan and DC cooling Fan. 
         FIG. 5  is a diagram to show the implementation of this invention on computer power supply. 
         FIG. 6  is another diagram to show the implementation of this invention on computer power supply. 
         FIG. 7  is another diagram to show the implementation of this invention on computer power supply. 
         FIG. 8  is a diagram to show the implementation of this invention on computer chassis. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Please refer to  FIGS. 1-8 . This invention comprises the following stated parts: one airflow guiding duct  2  which can be attached on a DC cooling fan  1 , one or more airflow guiding pipes  3 , and one or more auxiliary fans  4 . 
     Above mentioned, airflow guiding duct  2  has screw holes  21  and one or more 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  1 . 
     Please refer to  FIG. 2 . The airflow guiding duct  2  is attached with the DC cooling fan  1  by the screw hole  21  on the airflow guiding duct  2  and screw hole  11  of the DC cooling fan  11 , by fastening the screw  12  to the DC cooling fan  1  the airflow guiding duct  2  is fastened with the DC cooling fan  1 . 
     The bell shaped opening mouth  26  on the airflow guiding duct  2  directs some air from the DC cooling fan  1  to the airflow channel&#39;s tube connectors  22 ,  23 ,  24  &amp;  25 . 
     The above mentioned way to fasten the airflow guiding duct  2  with DC cooling fan  1  is not limited to above stated screw holes  21 ,  11  but can include fastening by hooks or other ways. 
     Please refer to  FIG. 3 . The auxiliary cooling fan  4  for this device includes one or more oblique panels  41  which are used to impel the fan blades  43  at a proper angle. There is one or more respective tube connecting pipe or fastener  42  on oblique panel  41 . 
     The connecting pipe or fastener  42  on the above stated oblique panel  41  is not limited to the tube type connecting pipe which is adopted in this invention. Anything which can position or fasten one side of the airflow guiding pipe  3  can be included. 
     Please refer to  FIG. 4 . The airflow guiding pipe(s)  3  in this device attach at to one side of the airflow guiding duct  2  attaches at 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 auxiliary fan  4 . 
     When the DC cooling fan  1  is operating, part of the air flow therefrom will be guided through the middle of airflow guiding duct  2  and airflow guiding pipe  3  to impel auxiliary fan(s)  4  to run and blow air to cool a designated heat generator or exhaust the hot air in that environment area to outside of a chassis. In the meantime, it will not affect cooling function of the DC cooling Fan  1 . 
     Please refer to  FIGS. 5 to 6  showing this invention&#39;s implementing example in a computer power supply. An airflow guiding duct  2  is attached to the DC cooling fan  1  which is originally installed in the power supply  5 . The auxiliary cooling fan  4  is fixed on or near the inner side of the power supply  5  casing and connected to the airflow guiding pipe  3  and thus to any of the airflow channel&#39;s tube connectors  22 ,  23 ,  24  &amp;  25  which are on the airflow guiding duct  2 . 
     Please refer to  FIGS. 7 and 8 . The airflow duct  2  is attached to the DC cooling fan  1  which is originally installed in the computer chassis. One or more auxiliary cooling fans  4  are affixed on or near the inside of the rear or side panels of the computer chassis and/or to the designated surrounding heat generator devices, such as Hard Disc, CPU heat sink or electro-coils. A required number of airflow guiding pipes  3  are connected to the airflow channel&#39;s tube connectors  22 ,  23 ,  24  &amp;  25  of the airflow guiding duct  2  and the connecting pipe or fastener  42  on the oblique panel  41  which is on auxiliary fan(s)  4 . 
     The 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 airflow to airflow guiding pipe  3  to impel one or more auxiliary fan(s)  4 . 
     By this operation, the cooling function of original DC cooling fan  1  is not reduced, but rather the needs for DC cooling fan  1  are reduced. The auxiliary cooling fan(s)  4  helps blow and exhaust air to enhance cooling effects and the numbers of installing DC cooling fan  1  can be reduced.