Fan assembly for centrifugal blower and air conditioning apparatus including the same

Abstract

A fan assembly for a centrifugal blower and an air conditioning apparatus including the same are provided. The fan assembly for the centrifugal blower includes a first support configured to receive a driving force from a driving source to rotate, a plurality of blades having one end supported by the first support and arranged with an interval in a circumferential direction of the first support, and a second support configured to support the other end of the plurality of blades and including an air inlet formed therein, wherein the plurality of blades include a first portion disposed adjacent to the air inlet, and a second portion further from the air inlet than the first portion and having a wider width than the first portion, and at least one of the first and second portions has a constant width.

What is claimed is: 
     
         1 . A fan assembly for a centrifugal blower, the fan assembly comprising:
 a first support to receive a driving force from a driving source;   a plurality of blades having a first end supported by the first support and arranged at an interval in a circumferential direction of the first support; and   a second support configured to support a second end of the plurality of blades and comprising an air inlet formed therein,   wherein the plurality of blades each comprise a first portion and a second portion, wherein the second portion is disposed further from the air inlet than the first portion and has a wider width than the first portion, and   wherein at least one of the first and second portions has a constant width.   
     
     
         2 . The fan assembly for the centrifugal blower as claimed in  claim 1 , wherein any one of the first and second portions is tapered towards the air inlet. 
     
     
         3 . The fan assembly for the centrifugal blower as claimed in  claim 1 , wherein a length of the first portion is equal to or smaller than a length of the second portion. 
     
     
         4 . The fan assembly for the centrifugal blower as claimed in  claim 1 , wherein the second portion protrudes more towards an inner side of the fan assembly than the first portion. 
     
     
         5 . The fan assembly for the centrifugal blower as claimed in  claim 4 , wherein a portion of an internally protruding portion of the second portion, adjacent to the first portion, is rounded. 
     
     
         6 . The fan assembly for the centrifugal blower as claimed in  claim 1 , wherein the second portion comprises an extension portion disposed adjacent to the first support and extending towards a rotation center of the first support. 
     
     
         7 . The fan assembly for the centrifugal blower as claimed in  claim 1 , wherein each of the plurality of blades is curved in a direction from an external side to an internal side of the first support. 
     
     
         8 . The fan assembly for the centrifugal blower as claimed in  claim 1 , wherein:
 each of the plurality of blades further comprises a third portion disposed between the first portion and the second portion; and   the third portion is wider than a width of the first portion and is narrower than a width of the second portion.   
     
     
         9 . The fan assembly for the centrifugal blower as claimed in  claim 8 , wherein a length of the third portion is equal to or greater than the sum of the first and second portions. 
     
     
         10 . The fan assembly for the centrifugal blower as claimed in  claim 8 , wherein:
 the third portion comprises a plurality of sections with different widths; and   the plurality of sections have a width tapered towards the air inlet.   
     
     
         11 . The fan assembly for the centrifugal blower as claimed in  claim 8 , wherein the third portion has a constant width or a width tapered towards the air inlet. 
     
     
         12 . A fan assembly for a centrifugal blower, the fan assembly comprising:
 a first support to receive a driving force from a driving source;   a plurality of blades having a first end supported by the first support and arranged at an interval in a circumferential direction of the first support; and   a second support configured to support a second end of the plurality of blades and comprising an air inlet formed therein,   wherein the plurality of blades each comprise a first portion that is tapered towards the air inlet, and a second portion, wherein the second portion is disposed further from the air inlet than the first portion and has a wider width than the first portion.   
     
     
         13 . The fan assembly for the centrifugal blower as claimed in  claim 12 , wherein a length of the first portion is equal to or smaller than a length of the second portion. 
     
     
         14 . The fan assembly for the centrifugal blower as claimed in  claim 12 , wherein the second portion protrudes more towards a rotation center of the first support than the first portion. 
     
     
         15 . The fan assembly for the centrifugal blower as claimed in  claim 12 , wherein the second portion further comprises an extension portion disposed adjacent to the first support and extending towards a rotation center of the first support. 
     
     
         16 . The fan assembly for the centrifugal blower as claimed in  claim 12 , wherein each of the plurality of blades is curved in a direction from an internal side to an external side of the first support. 
     
     
         17 . An air conditioning apparatus comprising:
 a housing comprising a suction port for air and a discharge port for air, formed therein;   a heat exchanger disposed on an air path of the air, formed within the housing; and   a centrifugal blower disposed within the housing and comprising a fan assembly for discharging air introduced through the suction port to the discharge port,   wherein the fan assembly comprises a plurality of blades each comprising a first portion and a second portion, wherein the second portion is disposed further from the suction port than the first portion and has a wider width than the first portion, and   wherein at least one of the first and second portions has a constant width.   
     
     
         18 . The air conditioning apparatus as claimed in  claim 17 , wherein any one of the first and second portions is gradually or non-gradually tapered towards the suction port. 
     
     
         19 . The air conditioning apparatus as claimed in  claim 17 , wherein a length of the first portion is equal to or smaller than a length of the second portion. 
     
     
         20 . The air conditioning apparatus as claimed in  claim 17 , wherein:
 each of the plurality of blades further comprises a third portion disposed between the first portion and the second portion; and   the third portion is wider than a width of the first portion and is narrower than a width of the second portion.