Fan module

Abstract

A fan module is provided. The fan module is configured to dissipate heat from, e.g., a compressor and a condenser disposed in a machine room of the refrigerator. The fan module includes a fan, a shroud having a receiving hole positioned around the fan, a fan mounting portion coupled to a rear surface of the shroud on which the fan is mounted, the rear surface facing a downstream airflow direction of the fan, and a concave recess provided on a rear surface of the shroud and circling the receiving hole. The fan module prevents noise caused by air passing through the receiving hole and prevents flow loss.

1 . A fan module comprising:
 a fan;   a shroud having a receiving hole positioned around the fan;   a fan mounting portion coupled to a rear surface of the shroud on which the fan is mounted, the rear surface facing a downstream airflow direction of the fan; and   a concave recess provided on the rear surface of the shroud and circling the receiving hole.   
     
     
         2 . The fan module of  claim 1 , wherein the concave recess has a semicircular cross-section. 
     
     
         3 . The fan module of  claim 1 , wherein a side rib of the concave recess adjacent to an outer edge of the fan extends in an axial direction of the fan. 
     
     
         4 . The fan module of  claim 1 , wherein a convex ring is provided on a front surface of the shroud in an upstream airflow direction of the fan circling the receiving hole. 
     
     
         5 . The fan module of  claim 1 , wherein the fan comprises:
 a hub;   a plurality of blades provided in a radial direction of the hub; and   a motor received in the hub so as to rotate the fan,   wherein, the motor is configured as an outer rotor type motor.   
     
     
         6 . The fan module of  claim 5 , wherein a circuit board supplying a signal to the motor is coupled to a lower portion of the motor to be molded. 
     
     
         7 . The fan module of  claim 5 , wherein the fan mounting portion comprises:
 a motor supporting portion to which the motor is mounted, and   a plurality of spokes configured to couple the motor supporting portion to the shroud,   wherein a rotation shaft of the motor is aligned at a center of the receiving hole and the motor and the motor supporting portion are coupled to each other.   
     
     
         8 . The fan module of  claim 7 , further comprising:
 a protruding portion provided at a lower portion of the motor; and   a motor mounting portion provided at the motor supporting portion coupled to the protruding portion such that the rotation shaft of the motor is provided at the center of the receiving hole.   
     
     
         9 . The fan module of  claim 7 , further comprising:
 a recess portion provided at a lower portion of the motor; and   a motor mounting portion provided at the motor supporting portion coupled to the recess portion such that the rotation shaft of the motor is provided at the center of the receiving hole.   
     
     
         10 . The fan module of  claim 7 , wherein the plurality of spokes are spaced from each other by a constant angle therebetween. 
     
     
         11 . The fan module of  claim 10 , wherein each of the plurality of spokes extends in a length direction that is offset from the center of the motor supporting portion. 
     
     
         12 . The fan module of  claim 11 , wherein each spoke extending in the length direction does not overlap any other spoke. 
     
     
         13 . The fan module of  claim 7 , wherein the motor supporting portion is provided with a wire draw-out portion configured to draw out a lead wire of the motor. 
     
     
         14 . The fan module of  claim 13 , wherein the wire draw-out portion is configured as a cut-out portion of an edge of the motor supporting portion in a central direction of the motor supporting portion. 
     
     
         15 . The fan module of  claim 13 , wherein the motor supporting portion is provided with a locking portion configured to prevent the lead wire of the motor from being moved. 
     
     
         16 . The fan module of  claim 13 , wherein at least one of the plurality of spokes is provided with a receiving recess extending in a length direction configured to receive the lead wire.