Impeller for water pump

Abstract

Provided is an impeller for a water pump which may reduce noise occurring when the impeller is rotated by using a simple configuration, the impeller including: a main plate; and a plurality of blades arranged on one surface of the main plate, and spaced apart from each other in a circumferential direction of the main plate, wherein the plurality of blades are non-equal interval types in which the blades are spaced apart from each other at intervals not equal to each other.

What is claimed is: 
     
         1 . An impeller for a water pump, the impeller comprising:
 a main plate; and   a plurality of blades arranged on one surface of the main plate, and spaced apart from each other in a circumferential direction of the main plate,   wherein the plurality of blades are non-equal interval types in which the blades are spaced apart from each other at intervals not equal to each other.   
     
     
         2 . The impeller of  claim 1 , wherein the blade interval at which the plurality of blades are spaced apart from each other has an angle at which tips of the plurality of blades are spaced apart from each other. 
     
     
         3 . The impeller of  claim 2 , wherein the blade intervals adjacent to each other are different from each other. 
     
     
         4 . The impeller of  claim 3 , wherein the blade intervals are all different from each other. 
     
     
         5 . The impeller of  claim 2 , wherein the plurality of blades have blade intervals formed different from each other and positioned opposite to each other based on a center of the main plate. 
     
     
         6 . The impeller of  claim 2 , wherein the blade intervals are arranged randomly with no regularity. 
     
     
         7 . The impeller of  claim 2 , wherein the plurality of blades have different curved degrees. 
     
     
         8 . The impeller of  claim 2 , wherein the plurality of blades have different thicknesses. 
     
     
         9 . The impeller of  claim 2 , wherein when “N” indicates the number of blades and “A” indicates the blade interval, the blade interval is formed within an angle range that satisfies Equation 1 below: 
       
         
           
             
               
                 
                   
                     
                       
                         
                           360 
                           ⁢ 
                           ° 
                         
                         N 
                       
                       × 
                       0.9 
                     
                     ≤ 
                     A 
                     ≤ 
                     
                       
                         
                           360 
                           ⁢ 
                           ° 
                         
                         N 
                       
                       × 
                       
                         1.1 
                         . 
                       
                     
                   
                 
                 
                   
                     ( 
                     
                       Equation 
                       ⁢ 
                           
                       1 
                     
                     ) 
                   
                 
               
             
           
         
       
     
     
         10 . A water pump comprising:
 a motor housing having a shape of a container with an open upper side;   a stator positioned in the motor housing;   a lower casing coupled to the upper side of the motor housing, and including a rotor accommodating part that protrudes downward, has a rotor accommodating space concave downward from an upper surface thereof, and is inserted into the stator;   an upper casing coupled to an upper side of the lower casing, having an impeller accommodating space by being coupled with the lower casing, and including an inlet through which a fluid is introduced and an outlet through which the fluid is discharged by communicating with impeller accommodating space;   the impeller for a water pump of  claim 1  rotatably positioned in the impeller accommodating space; and   a rotor rotatably positioned in the rotor accommodating space of the lower casing and coupled to the impeller.   
     
     
         11 . The pump of  claim 10 , wherein the impeller for a water pump further includes a lower plate positioned opposite to the main plate and coupled to the plurality of blades, and
 the main plate and the plurality of blades of the impeller for a water pump are integrally formed with each other, and the lower plate is integrally formed with the rotor.   
     
     
         12 . The pump of  claim 11 , wherein the impeller for a water pump has a through hole positioned in a center of the main plate and passing through both sides thereof.