Heat-dissipating module, fan structure and impeller thereof

Abstract

A heat-dissipating module, a fan structure and an impeller. The heat-dissipating module comprises a fan structure providing the impeller to expel heat from a heat source. The impeller comprises a main body and a plurality of blade units. The main body has abase surface, and the blade units extending from the base surface of the main body. Each blade unit comprises a blade surface and a plurality of guiding portions disposed on the blade surface. The pattern of the guiding portions can be linear, curved, parallel or symmetrical, indented on or protruded from the blade units.

1 . An impeller, comprising: 
 a main body comprising a base surface; and    a plurality of blade units extending from the base surface of the main body, wherein each blade unit comprises a blade surface and a plurality of guiding portions disposed on the blade surface.    
   
   
       2 . The impeller as claimed in  claim 1 , wherein the guiding portions are integrally indented structures on the blade surface of the blade unit.  
   
   
       3 . The impeller as claimed in  claim 1 , wherein the guiding portions are integrally protruded structures from the blade surface of the blade unit.  
   
   
       4 . The impeller as claimed in  claim 1 , wherein at least one of the guiding portions is substantially aligned with the blade surface of the blade unit.  
   
   
       5 . The impeller as claimed in  claim 1 , wherein at least two of the guiding portions are substantially spaced on the blade surface of the blade unit in parallel.  
   
   
       6 . The impeller as claimed in  claim 1 , wherein at least one of the guiding portions is substantially curved on the blade surface of the blade unit.  
   
   
       7 . The impeller as claimed in  claim 6 , wherein two of the guiding portions are substantially and expansively curved on the blade surface of the blade unit in the longitudinal direction thereof.  
   
   
       8 . The impeller as claimed in  claim 1 , wherein at least two of the guiding portions are substantially and symmetrically spaced on the blade surface of the blade unit.  
   
   
       9 . The impeller as claimed in  claim 1 , wherein the guiding portions are substantially and expansively linear structures on the blade surface of the blade unit in the longitudinal direction thereof.  
   
   
       10 . The impeller as claimed in  claim 1 , wherein the guiding portions comprise a plurality of recesses or protrusions, formed on the blade surface of the blade unit.  
   
   
       11 . A fan structure, comprising: 
 a housing;    an impeller rotatably disposed in the housing, comprising a main body having a base surface and a plurality of blade units extending from the base surface of the main body, wherein each blade unit comprises a blade surface and a plurality of guiding portions disposed on the blade surface.    
   
   
       12 . The impeller as claimed in  claim 11 , wherein the guiding portions of the impeller are integrally indented structures on the blade surface of the blade unit.  
   
   
       13 . The fan structure as claimed in  claim 11 , wherein the guiding portions of the impeller are integrally protruded structures from the blade surface of the blade unit.  
   
   
       14 . The fan structure as claimed in  claim 11 , wherein at least one of the guiding portions of the impeller is substantially aligned with the blade surface of the blade unit.  
   
   
       15 . The fan structure as claimed in  claim 11 , wherein at least two of the guiding portions of the impeller are substantially spaced apart in parallel and on the blade surface of the blade unit.  
   
   
       16 . The fan structure as claimed in  claim 11 , wherein at least one of the guiding portions of the impeller is substantially curved on the blade surface of the blade unit.  
   
   
       17 . The fan structure as claimed in  claim 16 , wherein two of the guiding portions of the impeller are substantially and expansively curved on the blade surface of the blade unit in the longitudinal direction thereof.  
   
   
       18 . The fan structure as claimed in  claim 11 , wherein at least two of the guiding portions of the impeller are substantially and symmetrically spaced on the blade surface of the blade unit.  
   
   
       19 . The fan structure as claimed in  claim 11 , wherein the guiding portions are substantially and expansively linear structures on the blade surface of the blade unit in the longitudinal direction thereof.  
   
   
       20 . The fan structure as claimed in  claim 11 , wherein the guiding portions of the impeller comprise a plurality of recesses or protrusions, formed on the blade surface of the blade unit.  
   
   
       21 . A heat-dissipating module for dissipating heat from a heat source, comprising: 
 a conductive element disposed on the heat source;    a fan structure disposed on the conductive element, comprising a housing and an impeller rotatably disposed in the housing, wherein the impeller comprises a main body having a base surface and a plurality of blade units extending from the base surface of the main body, and each blade unit comprises a blade surface and a plurality of guiding portions disposed on the blade surface.    
   
   
       22 . The heat-dissipating module as claimed in  claim 21 , wherein the guiding portions of the impeller are integral recesses or protrusions on the blade surface of the blade unit.