Fan module and electric blower having the same

Abstract

Disclosed herein is a fan module including an impeller cover having an intake member formed therein and covering one side of a housing, an impeller accommodated within the impeller cover and rotatably coupled to a rotational shaft of a motor accommodated in the housing, and a leakage reduction member positioned in an inner surface of the impeller cover to reduce a flow leakage between the impeller cover and the impeller.

What is claimed is: 
     
         1 . A fan module comprising:
 an impeller cover having an intake member formed therein and covering one side of a housing;   an impeller accommodated within the impeller cover and rotatably coupled to a rotational shaft of a motor accommodated in the housing; and   a leakage reduction member positioned in an inner surface of the impeller cover to reduce a flow leakage between the impeller cover and the impeller.   
     
     
         2 . The fan module as set forth in  claim 1 , wherein the leakage reduction member is made of a material having strength lower than that of the impeller. 
     
     
         3 . The fan module as set forth in  claim 2 , wherein the leakage reduction member is made of one or more of plaster, carbon powder, and plastic. 
     
     
         4 . The fan module as set forth in  claim 1 , wherein the impeller cover has an installation recess allowing the leakage reduction member to be installed therein, and the leakage reduction member is installed in the installation recess. 
     
     
         5 . The fan module as set forth in  claim 4 , wherein the installation recess and the leakage reduction member are formed to have shapes corresponding to each other. 
     
     
         6 . The fan module as set forth in  claim 1 , wherein the impeller cover has a coupling hole formed in an inner surface of the installation recess, and the leakage reduction member has a coupling projection coupled to the coupling hole. 
     
     
         7 . The fan module as set forth in  claim 6 , wherein the coupling projection is provided as a pair, and the pair of coupling projections are formed to be spaced apart from each other by a predetermined interval. 
     
     
         8 . The fan module as set forth in  claim 7 , wherein the pair of coupling projections are formed to become distant from each other toward an end portion thereof. 
     
     
         9 . The fan module as set forth in  claim 8 , wherein the pair of coupling projections have protrusions formed in end portions thereof, respectively, and protruded in a direction in which they become distant from each other. 
     
     
         10 . The fan module as set forth in  claim 1 , further comprising a diffuser disposed in an outer circumference of the impeller to guide air discharged from the impeller to a flow path. 
     
     
         11 . An electric blower comprising:
 a housing having one side opened and having an accommodation portion formed therein;   a motor accommodated in the housing;   an impeller rotated by the motor;   a diffuser disposed in an outer circumference of the impeller to guide air discharged from the impeller to a flow path;   an impeller cover accommodating the impeller therein, having an intake member, and covering one side of the housing; and   a leakage reduction member positioned in an inner surface of the impeller cover to reduce flow leakage between the impeller cover and the impeller.   
     
     
         12 . The electric blower as set forth in  claim 11 , wherein the leakage reduction member is made of a material having strength lower than that of the impeller. 
     
     
         13 . The electric blower as set forth in  claim 12 , wherein the leakage reduction member is made of one or more of plaster, carbon powder, and plastic. 
     
     
         14 . The electric blower as set forth in  claim 11 , wherein the impeller cover has an installation recess allowing the leakage reduction member to be installed therein, and the leakage reduction member is insertedly installed in the installation recess. 
     
     
         15 . The electric blower as set forth in  claim 14 , wherein the installation recess and the leakage reduction member are formed to have shapes corresponding to each other. 
     
     
         16 . The electric blower as set forth in  claim 11 , wherein the impeller cover has a coupling hole formed in an inner surface of the installation recess, and the leakage reduction member has a coupling projection coupled to the coupling hole. 
     
     
         17 . The electric blower as set forth in  claim 16 , wherein the coupling projection is provided as a pair, and the pair of coupling projections are formed to be spaced apart from each other by a predetermined interval. 
     
     
         18 . The electric blower as set forth in  claim 17 , wherein the pair of coupling projections are formed to become distant from each other toward an end portion thereof. 
     
     
         19 . The electric blower as set forth in  claim 18 , wherein the pair of coupling projections have protrusions formed in end portions thereof, respectively, and protruded in a direction in which they become distant from each other.