Outdoor unit for air conditioner

Abstract

Provided is an outdoor unit of an air conditioner. The outdoor unit of an air conditioner includes an axial flow fan including a hub and a plurality of blades disposed on the hub, a rotation orifice disposed to surround the axial flow fan, the rotation orifice guiding air flowing by the axial flow fan, and a fixed orifice having an orifice hole through which the air flowing by the axial flow fan passes, the fixed orifice being disposed outside the rotation orifice. At least one portion of each of the blades and one surface of the rotation orifice are coupled to each other and rotated together with each other.

1 . An outdoor unit of an air conditioner, the outdoor unit comprising:
 a casing including an intake hole and an exhaust hole;   a heat exchanger;   an axial flow fan to suck in air through the intake hole and to exhaust air through the exhaust hole, wherein the sucked in air passes through the heat exchanger, the axial flow fan comprising a hub and a plurality of blades disposed on the hub; and   a rotation orifice disposed to surround the axial flow fan, wherein at least one portion of at least one of the blades and at least one surface of the rotation orifice are coupled to rotate together with each other.   
     
     
         2 . The outdoor unit of an air conditioner according to  claim 1 , further comprising a fixed orifice located at least at the exhaust hole of the casing, wherein the rotation orifice is located inside the fixed orifice. 
     
     
         3 . The outdoor unit of an air conditioner according to  claim 2 , further comprising an extension part extending from the rotation orifice to shield at least one portion of the exhaust hole. 
     
     
         4 . The outdoor unit of an air conditioner according to  claim 3 , wherein the extension part extends from at least one of one end and an other end of the rotation orifice. 
     
     
         5 . The outdoor unit of an air conditioner according to  claim 3 , wherein the extension part extends from the rotation orifice in a direction perpendicular or substantially perpendicular to a flow direction of the air generated by the axial flow fan. 
     
     
         6 . The outdoor unit of an air conditioner according to  claim 4 , wherein the extension part comprises:
 a first extension part extending from the one end of the rotation orifice corresponding to a relatively upstream side in a flow direction of the air generated by the axial flow fan; and   a second extension part extending from the other end of the rotation orifice corresponding to a relatively downstream side in a flow direction of the air generated by the axial flow fan.   
     
     
         7 . The outdoor unit of an air conditioner according to  claim 3 , wherein, when a virtual straight line extends from an outer end of the extension part in the flow direction of the air generated by the axial flow fan, the straight line meets the fixed orifice. 
     
     
         8 . The outdoor unit of an air conditioner according to  claim 1 , further comprising at least one auxiliary blade protruding from one surface of the rotation orifice. 
     
     
         9 . The outdoor unit of an air conditioner according to  claim 2 , further comprising at least one auxiliary blade disposed in a space between the rotation orifice and the fixed orifice. 
     
     
         10 . The outdoor unit of an air conditioner according to  claim 8 , wherein a plurality of auxiliary blades are provided on an outer surface of the rotation orifice. 
     
     
         11 . The outdoor unit of an air conditioner according to  claim 8 , wherein an air flow generated from the at least one auxiliary blade opposes air flowing into the exhaust hole. 
     
     
         12 . The outdoor unit of an air conditioner according to  claim 1 , further comprising a tip defining an end of the at least one blade,
 wherein the tip is integrated with the rotation orifice.   
     
     
         13 . The outdoor unit of an air conditioner according to  claim 1 , wherein the at least one blade is coupled to an inner surface of the rotation orifice. 
     
     
         14 . The outdoor unit of an air conditioner according to  claim 2 , wherein the axial flow fan and the rotation orifice are disposed inside the fixed orifice. 
     
     
         15 . An outdoor unit of an air conditioner comprising:
 an outdoor heat exchanger;   an axial flow fan to blow air to heat-exchange the outdoor heat exchanger with the air, the axial flow fan comprising a hub and a plurality of blades disposed on the hub;   a rotation orifice rotatable together with the axial flow fan;   a fixed orifice disposed at an exhaust side in a flow direction of the air generated by the axial flow fan when compared to that of the rotation orifice, the fixed orifice formed with a orifice hole; and   a plurality of auxiliary blades disposed on an outer surface of the rotation orifice, the plurality of auxiliary blades generating a flow direction of air in the same direction as that of the axial flow fan,   wherein the air flowing by the rotation of the axial flow fan passes through one portion of the orifice hole, and the air flowing by the rotation of the auxiliary blades passes through the other portion of the orifice hole.   
     
     
         16 . The outdoor unit of an air conditioner according to  claim 15 , wherein the axial flow fan and the rotation orifice are integrated with each other. 
     
     
         17 . The outdoor unit of an air conditioner according to  claim 15 , wherein a front end of each of the auxiliary blades is spaced from the orifice hole in a direction perpendicular or substantially perpendicular to the flow direction of the air generated by the axial flow fan. 
     
     
         18 . The outdoor unit of an air conditioner according to  claim 15 , wherein an inner surface of the orifice hole is spaced from an outer surface of the rotation orifice in a direction perpendicular to the flow direction of the air generated by the axial flow fan. 
     
     
         19 . The outdoor unit of an air conditioner according to  claim 15 , further comprising an extension part extending from the rotation orifice toward the fixed orifice to shield a portion of the orifice hole in the flow direction of the air generated by the axial flow fan. 
     
     
         20 . The outdoor unit of an air conditioner according to  claim 19 , wherein the extension part extends from at least one end of the rotation orifice.