Fan motor and vacuum cleaner having the same

Abstract

Disclosed are a fan motor and a vacuum cleaner which include a blowing fan and a plurality of diffuser blades disposed at a radially outer side of the blowing fan and circumferentially spaced apart from each other. Outer end portions of the plurality of diffuser blades include a spoiler portion formed obliquely to an outward direction with respect to an extending direction of the diffuser blades, so that a flow separation of air flowing across an outer surface of the diffuser blade is reduced. Accordingly, the suction force of the fan motor increases.

1 . A fan motor comprises:
 a blowing fan, and   a plurality of diffuser blades provided on a radially outer side of the blowing fan and spaced apart from each other in a circumferential direction,   wherein each of the plurality of diffuser blades includes a spoiler portion provided at an outer end of the diffuser blade and extending obliquely to an outward direction with respect to an extending direction of the diffuser blades.   
     
     
         2 . The fan motor according to  claim 1 , wherein the plurality of diffuser blades each extend obliquely with respect to the circumferential direction. 
     
     
         3 . The fan motor according to  claim 1 , wherein the spoiler portion is formed such that outer surface of the spoiler portion is at an angle between about 5 and about 20 degrees with respect to the extending direction of the diffuser blade. 
     
     
         4 . The fan motor according to  claim 1 , wherein the spoiler portion has a length, which is a third of the length of the diffuser blade. 
     
     
         5 . The fan motor according to  claim 1 , wherein the diffuser blade has a thickness such that an inner end portion of the diffuser blade thicker than an outer end portion of the diffuser blade. 
     
     
         6 . The fan motor according to  claim 5 , wherein the diffuser blade has a gradually increasing thickness from the inner end portion to the outer end portion. 
     
     
         7 . The fan motor according to  claim 1 , further comprises:
 a motor housing configured to accommodate the motor;   a fan housing configured to accommodate the blowing fan and coupled to the motor housing, and   a guide member configured to guide air discharged from the blowing fan,   wherein the guide member includes a partition wall having a circular plate shape, and the plurality of diffuser blades are provided at an outermost edge of one side of the partition wall.   
     
     
         8 . A vacuum cleaner comprising the fan motor according to  claim 1 . 
     
     
         9 . A vacuum cleaner comprising the fan motor according to  claim 2 . 
     
     
         10 . A vacuum cleaner comprising the fan motor according to  claim 3 . 
     
     
         11 . A vacuum cleaner comprising the fan motor according to  claim 4 . 
     
     
         12 . A vacuum cleaner comprising the fan motor according to  claim 5 . 
     
     
         13 . A vacuum cleaner comprising the fan motor according to  claim 6 . 
     
     
         14 . A vacuum cleaner comprising the fan motor according to  claim 7 .