Centrifugal blower

Abstract

An exemplary centrifugal blower is adapted for dissipating heat generated by an electronic component mounted on a printed circuit board. The centrifugal blower includes a housing defining a receiving space therein, and an impeller rotatably received in the housing. The impeller includes a hub, a supporting member fixed on the hub, and a plurality of blades extending outwardly from the supporting member. The blades are made of metal.

1 . A centrifugal blower, comprising:
 a housing defining a receiving space therein; and   an impeller rotatably received in the housing, the impeller comprising a hub, a supporting member fixed on the hub, and a plurality of blades extending outwardly from the supporting member, and the blades being made of metal.   
     
     
         2 . The centrifugal blower of  claim 1 , wherein the blades are made of magnesium aluminum alloy. 
     
     
         3 . The centrifugal blower of  claim 1 , wherein the housing comprises a base board, a covering board located above the base board, a sidewall extending downwardly from an outer periphery of the covering board to contact an outer periphery of the base board. 
     
     
         4 . The centrifugal blower of  claim 3 , wherein a first air inlet is defined at a center of the covering board. 
     
     
         5 . The centrifugal blower of  claim 3 , wherein a plurality of second air inlets are defined at a central portion of the base board. 
     
     
         6 . The centrifugal blower of  claim 3 , wherein an air outlet is defined at a lateral side of the housing. 
     
     
         7 . The centrifugal blower of  claim 1 , wherein the blades are arranged radially relative to the hub. 
     
     
         8 . The centrifugal blower of  claim 1 , wherein each blade has an arced configuration. 
     
     
         9 . The centrifugal blower of  claim 1 , wherein a thickness of each blade is smaller than 0.5 mm. 
     
     
         10 . The centrifugal blower of  claim 9 , wherein the thickness of each blade is 0.3 mm. 
     
     
         11 . The centrifugal blower of  claim 1 , wherein the supporting member comprises a hollow main body fixed on and encircling the hub, a fixing ring encircling the main body, and a plurality of spaced arms interconnecting the main body and the fixing ring. 
     
     
         12 . The centrifugal blower of  claim 11 , wherein the blades are fixed to the fixing ring. 
     
     
         13 . The centrifugal blower of  claim 12 , wherein the blades each define a lateral slit, the fixing ring engaging into the slits of the blades. 
     
     
         14 . An impeller, comprising:
 a housing; and   an impeller rotatably received in the housing, the impeller comprising a hub, and a plurality of blades surrounding the hub, and the blades being made of magnesium aluminum alloy.   
     
     
         15 . The centrifugal blower of  claim 14 , wherein the housing comprises a base board, a covering board located above the base board, a sidewall extending downwardly from the covering board and interconnecting outer peripheries of the covering board and the base board. 
     
     
         16 . The centrifugal blower of  claim 15 , wherein a first air inlet is defined at a center of the covering board, and a second air inlet are defined at the base board opposite to the first air inlet. 
     
     
         17 . The centrifugal blower of  claim 15 , wherein an air outlet is defined at a lateral side of the housing. 
     
     
         18 . The centrifugal blower of  claim 14 , wherein the blades each comprise a first portion and a second portion extending from the first portion, the first portion having a height larger than that of the second portion along an axial direction of the impeller. 
     
     
         19 . The centrifugal blower of  claim 14 , wherein each blade has an arced configuration. 
     
     
         20 . The centrifugal blower of  claim 14 , wherein the thickness of each blade is 0.3 mm.