Patent Publication Number: US-2007098544-A1

Title: Device for enhancing performance of a fan assembly

Description:
BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention is related to a device for enhancing performance of a fan assembly and particularly to a guide flow structure, which is capable of being joined to a fan for promoting performance of the fan.  
      2. Brief Description of the Related Art  
      Referring to  FIG. 1 , the conventional fan device  1  includes a fan frame  11  and a fan blade part  12 . The fan frame  11  provides a joining part  13  with a plurality of rib stripes  14  connecting with the fan frame  11 . A motor is disposed between the fan blade part  12  and the joining part  13  such that the fan blade part  12  is driven by the motor to rotate in the fan frame  11 . However, air resistance of the rib stripes  14  is easy to cause turbulent flow while the conventional fan  1  is in a state of rotating. Under this circumference, air pressure loss is created to lower performance of the fan  1 .  
      In order to prevent the air resistance resulting from the rib stripes  14 , static blades are used instead of the rib stripes  14 . Referring to  FIG. 2 , another conventional fan  2  includes a fan frame  21  and a plurality of movable blades  22 . A connecting part  23  is provided in the fan frame  21  and a plurality of static blades  24  is joined to the connecting part  23  and the fan frame  21  respectively. A motor is disposed between the movable blades  22  and the connecting part  23  to drive the movable blades  22  such that air is induced by the rotational movable blades  22  to overcome deficiency of the turbulent flow resulting from the rib stripes  14  and promoting efficiency of the movable blades  22 .  
      However, the preceding fan  2  with static blades  24  has the following disadvantages:  
      (1) The static blades  24  are unable to be added to the fan  2  unless the fan  2  is replaced with a new one.  
      (2) Number of the static blades  24  is unable to be changed for complying with various heat dissipating demands.  
     SUMMARY OF THE INVENTION  
      In order to solve the preceding problems, an object of the present invention is to provide a device for enhancing performance of a fan assembly.  
      Another object of the present invention is to provide a device for enhancing performance of a fan assembly, which is set up conveniently.  
      A further object of the present invention is to provide a device for enhancing performance of a fan assembly in which the number of the rectifying parts thereof can be changed in accordance with various heat dissipating demands. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
      The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:  
       FIG. 1  is a perspective view of a conventional fan;  
       FIG. 2  is a perspective view of another conventional fan;  
       FIG. 3  is an exploded perspective view of the first embodiment of a fan device with enhanced performance according to the present invention;  
       FIG. 4  is an exploded perspective view of the second embodiment of a fan device with enhanced performance according to the present invention;  
       FIG. 5  is an exploded perspective view of the third embodiment of a fan device with enhanced performance according to the present invention;  
       FIG. 6  is an exploded perspective view of the fourth embodiment of a fan device with enhanced performance according to the present invention; and  
       FIG. 7  is an exploded perspective view of the fifth embodiment of a fan device with enhanced performance according to the present invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      Referring to  FIG. 3 , the first preferred embodiment of a device for enhancing performance of a fan assembly according to the present invention includes a frame member  311 , a joining part  312  and a plurality of rectifying part  313 . The rectifying parts  313  are disposed between the frame member  311  and the joining part  312  to connect with the frame  311  and the joining part  312  respectively. Further, the rectifying part  313  has a first passage  313   a  and a second passage  313   b  at two lateral sides thereof respectively to receive the guide flow parts  325  provided by a fan assembly  32 . The fan assembly  32  further includes a fan frame  321 , a fan blade part  322 , a connecting part  323  and a drive part  324 . The fan blade part  324  is mounted to the drive part  324  and the drive part  324  is mounted to the connecting part  323 , which is joined to the fan frame  321 .  
      When the preceding device for enhancing performance of a fan is assembled, the fixing holes  321   a  of the fan frame  321  align with the fixing holes  311   a  of the frame member  311  and the fan frame  321  is attached to the frame member  311  by means of fasteners  33  engaging with the fixing holes  321   a  and  311   a . Meanwhile, the guide flow part  325  is received in the first passage  313   a  and the second passage  313   b.    
      Referring to  FIG. 4 , the second embodiment of a device for enhancing performance of a fan according to present invention includes a frame member  411 , a joining part  412  and a plurality of rectifying parts  413 . The rectifying parts  413  are disposed between the frame member  411  and the joining part  412  to connect with the frame  411  and the joining part  412  respectively. Further, the rectifying part  413  has a first passage  413   a  and a second passage  413   b  at two lateral sides thereof respectively to receive the guide flow parts  425  provided by a fan assembly  42 . The fan assembly  42  further includes a fan frame  421 , a fan blade part  422 , a connecting part  423  and a drive part  424 . The fan blade part  424  is mounted to the drive part  424  and the drive part  424  is mounted to the connecting part  423 , which is joined to the fan frame  421 .  
      When the preceding device for enhancing performance of a fan is assembled, the fixing holes  421   a  of the fan frame  421  engage with the locating parts  411   a  of the frame member  411 . Meanwhile, the guide flow part  425  is received in the first passage  413   a  and the second passage  413   b.    
      Referring to  FIG. 5 , the third embodiment of a device for enhancing performance of a fan according to present invention includes a frame member  511 , a joining part  512  and a plurality of rectifying parts  513 . The rectifying parts  513  are disposed between the frame member  511  and the joining part  512  to connect with the frame  511  and the joining part  512  respectively. Further, the rectifying part  513  has a first passage  513   a  and a second passage  513   b  at two lateral sides thereof respectively to receive the guide flow parts  525  provided by a fan assembly  52 . The fan assembly  52  further includes a fan frame  521 , a fan blade part  522 , a connecting part  523  and a drive part  524 . The fan blade part  524  is mounted to the drive part  524  and the drive part  524  is mounted to the connecting part  523 , which is joined to the fan frame  521 .  
      When the preceding device for enhancing performance of a fan assembly is assembled, the fixing holes  523   a  of the connecting part  523  engage with the locating parts  512   a  of the joining part  512 . Meanwhile, the guide flow part  525  is received in the first passage  513   a  and the second passage  513   b.    
      Referring to  FIG. 6 , the fourth embodiment of a device for enhancing performance of a fan assembly according to present invention includes a frame member  611 , a joining part  612  and a plurality of rectifying parts  613 . The rectifying parts  613  are disposed between the frame member  611  and the joining part  612  to connect with the frame  611  and the joining part  612  respectively. Further, the rectifying part  613  has a first passage  613   a  and a second passage  613   b  at two lateral sides thereof respectively to receive the guide flow parts  625  provided by a fan assembly  62 . The fan assembly  62  further includes a fan frame  621 , a fan blade part  622 , a connecting part  623  and a drive part  624 . The fan blade part  624  is mounted to the drive part  624  and the drive part  624  is mounted to the connecting part  623 , which is joined to the fan frame  621 .  
      When the preceding device for enhancing performance of a fan assembly is assembled, the guide flow part  625  of the fan assembly  62  engage with a plurality of indentations  612   a  provided at the circumference of the joining part  612 . Meanwhile, the guide flow part  525  is received in the first passage  513   a  and the second passage  513   b.    
      It can be seen from the preceding four embodiments of the present inventions that the rectifying part ( 313 ,  413 ,  513 ,  613 ) extends outward the frame member ( 311 ,  411 ,  511 ,  611 ) and the guide flow part ( 325 ,  425 ,  525 ,  625 ) extends outward the fan frame ( 321 ,  421 ,  521 ,  621 ). It is noted that another alternative with which a different shape from the preceding embodiments is capable of being embodied.  
      Referring to  FIG. 7 , the fifth embodiment of a device for enhancing performance of a fan according to present invention includes a frame member  711 , a joining part  712  and a plurality of rectifying parts  713 . The rectifying parts  713  are disposed between the frame member  711  and the joining part  712  to connect with the frame  611  and the joining part  712  respectively. Further, the rectifying parts  713  have a first passage  613   a  and a second passage  613   b  at two lateral sides thereof respectively to receive the guide flow parts  725  provided by a fan assembly  72 . The fan assembly  72  further includes a fan frame  721 , a fan blade part  722 , a connecting part  723  and a drive part  724 . The fan blade part  724  is mounted to the drive part  724  and the drive part  724  is mounted to the connecting part  723 , which is joined to the fan frame  721 .  
      When the preceding device for enhancing performance of a fan is assembled, the fixing holes  721   a  of the fan frame  721  align with the fixing holes  711   a  of the frame member  711  and the fan frame  721  is attached to the frame member  711  by means of fasteners  73  engaging with the fixing holes  721   a  and  711   a . Meanwhile, the guide flow part  725  is received in the first passage  713   a  and the second passage  713   b.    
      As the foregoing, the guide flow part ( 325 ,  425 ,  525 ,  625 ,  725 ) of the fan frame ( 321 ,  421 ,  521 ,  621 ,  721 ) is received in the first passage ( 313   a ,  413   a ,  513   a ,  613   a ,  713   a ) and the second passage ( 313   b ,  413   b ,  513   b ,  613   b ,  713   b ) at two lateral sides of the rectifying part ( 313 ,  413 ,  513 ,  613 ,  713 ) such that the rectifying parts ( 313 ,  413 ,  513 ,  613 ,  713 ) are capable of increasing the number of the guide flow part ( 325 ,  425 ,  525 ,  625 ,  725 ) and the integral performance of the fan assembly is promoted immediately.  
      It is appreciated that the present invention has the following advantages:  
      (1) The device for enhancing performance of the fan assembly according to the present invention can be detachably added to the fan assembly to meet different needs for heat dissipation.  
      (2) The device for enhancing performance of the fan assembly according to the present invention is detachably joined to the fan assembly such that it is operated conveniently and disassembled speedily.  
      (3) The device for enhancing performance of the fan assembly according to the present invention is capable of promoting performance such as increasing air pressure and enhancing effect of heat dissipation.  
      (4) The device for enhancing performance of the fan assembly according to the present invention is capable of enhancing the effect of guiding airflow without changing the original structure of the device.  
      While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.