Dual centrifugal fan structure and heat dissipation device having the fan structure

Abstract

A dual centrifugal fan structure having a first centrifugal fan, a second centrifugal fan, and a housing is disclosed. The housing is a hollow enclosure divided into a first chamber and a second chamber for installing the first and second centrifugal fans, respectively. The first and second chambers have first and second air inlets, respectively. The housing further includes an air outlet.

1 . A dual centrifugal fan structure, comprising: 
 a first centrifugal fan;    a second centrifugal fan; and    a hollow housing divided into a first chamber and a second chamber, wherein the first and second centrifugal fans are disposed within the first and second chamber, respectively, and the first and second chamber comprise a first air inlet and a second air inlet and an air outlet of the housing.    
   
   
       2 . The structure as claimed in  claim 1 , wherein each of the first and second centrifugal fans includes a set of blades and a motor driving the blades, such that the blades of the first and second centrifugal fans rotate towards opposite directions.  
   
   
       3 . The structure as claimed in  claim 1 , wherein the housing comprises a rim protruding outwardly and horizontally from a bottom periphery of the housing.  
   
   
       4 . The structure as claimed in  claim 1 , wherein each of the first and second chambers includes a support arm for mounting the first and second centrifugal fans therein, respectively.  
   
   
       5 . The structure as claimed in  claim 1 , wherein the first and second air inlets are formed at a top of the housing.  
   
   
       6 . The structure as claimed in  claim 1 , wherein the first and second air inlets are formed at two lateral sides of the housing.  
   
   
       7 . The structure as claimed in  claim 1 , wherein the first and second air inlets are formed at a front side and a rear side of the housing, respectively.  
   
   
       8 . A heat dissipation device having a dual centrifugal fan structure, comprising a heat sink, a wind mask mounted on the heat sink, and a first centrifugal fan and a second centrifugal fan disposed on the wind mask.  
   
   
       9 . The device as claimed in  claim 8 , wherein the heat sink includes an aluminum extrusion heat sink.  
   
   
       10 . The device as claimed in  claim 8 , wherein the heat sink includes a thermal conductive substrate, a plurality of fins extending from the substrate, and a plurality of channels formed between the fins.  
   
   
       11 . The device as claimed in  claim 8 , wherein the thermal conductive substrate includes a central spike formed of two curves descending from a peak of the central spike towards two elongate sides of the thermal conductive substrate.  
   
   
       12 . The device as claimed in  claim 8 , wherein the wind mask includes an n-shape frame.  
   
   
       13 . The device as claimed in  claim 8 , further comprising a hollow housing divided into a first chamber and a second chamber for mounting the first and second centrifugal fans therein, respectively, wherein the first and second chambers comprise a first air inlet and a second air inlet, respectively, and the housing further comprises an air outlet.  
   
   
       14 . The device as claimed in  claim 13 , wherein the housing comprises a protruding rim extending from a bottom periphery thereof.  
   
   
       15 . The device as claimed in  claim 13 , wherein the housing further comprises a pair of support arms for supporting the first and second centrifugal fans within the first and second chambers, respectively.  
   
   
       16 . The device as claimed in  claim 13 , wherein the first and second air inlets are formed at a top of the housing.  
   
   
       17 . The device as claimed in  claim 13 , wherein the first and second air inlets are formed at a bottom of the housing.  
   
   
       18 . The device as claimed in  claim 13 , wherein the first and second air inlets are formed at a top of the housing.  
   
   
       19 . The device as claimed in  claim 8 , further comprising a first housing and a second housing for installing the first and second centrifugal fans therein, respectively.  
   
   
       20 . The device as claimed in  claim 8 , wherein the first and second centrifugal fans each comprises a set of blades and a motor for driving the blades to rotate along opposite directions.