Air conditioning apparatus

Abstract

Provided is an air conditioning apparatus, including a unit main body in which a heat exchanger and at least one blower fan are provided. The heat exchanger is arranged on an upstream side of the blower fan. The blower fan includes an impeller, a motor, and a fan casing. The impeller is a turbofan that sucks air from an upper portion thereof and blows out the air radially outward. A rotation axis of the impeller is directed to a unit height direction. The fan casing has a fan air inlet formed in an upper surface thereof, and has a fan air outlet formed in a lower surface thereof. An impeller air outlet of the impeller is covered by side surfaces of the fan casing.

1 . An air conditioning apparatus, comprising:
 a unit main body;   a heat exchanger; and   at least one blower fan,   wherein the heat exchanger is arranged on an upstream side of the blower fan,   wherein the blower fan comprises an impeller, a motor, and a fan casing,   wherein the impeller comprises a turbofan that sucks air from an upper portion thereof and blows out the air radially outward,   wherein a rotation axis of the impeller is directed to a unit height direction,   wherein the fan casing has a fan air inlet formed in an upper surface thereof, and has a fan air outlet formed in a lower surface thereof, and   wherein an impeller air outlet of the impeller is covered by side surfaces of the fan casing,   wherein the impeller comprises a plurality of blades, a side plate having a ring shape, and a main plate,   wherein the side plate is positioned on the fan air inlet side, and the main plate is positioned on the fan air outlet side, and   wherein an outer diameter (φDs) of the side plate is larger than an outer diameter (φDm) of the main plate.   
     
     
         2 . An air conditioning apparatus according to  claim 1 , wherein the blower fan is arranged below the heat exchanger. 
     
     
         3 - 4 . (canceled) 
     
     
         5 . An air conditioning apparatus according to  claim 1 , wherein the air conditioning apparatus comprises a plurality of blower fans. 
     
     
         6 . An air conditioning apparatus according to  claim 5 , wherein the plurality of blower fans are arranged with an interval in a widthwise direction. 
     
     
         7 . An air conditioning apparatus according to  claim 5 , wherein the plurality of blower fans are controlled so as to have mutually different numbers of revolutions of the fans. 
     
     
         8 . An air conditioning apparatus according to  claim 1 , wherein the fan casing comprises a frame body, and at least one side wall surface is removably mounted to the frame body. 
     
     
         9 . An air conditioning apparatus according to  claim 1 ,
 wherein the blower fan comprises a motor support, and   wherein the motor support is positioned on the fan air outlet side of the main plate of the impeller.   
     
     
         10 . An air conditioning apparatus according to  claim 1 , wherein the side surfaces of the fan casing comprise at least one flat surface. 
     
     
         11 . An air conditioning apparatus according to  claim 10 , wherein the fan casing comprises at least one chamfered portion, with reference to a rectangular shape of the fan casing in plane view, at a portion corresponding to a corner of the rectangular shape. 
     
     
         12 . An air conditioning apparatus according to  claim 1 , wherein the heat exchanger has a shape comprising at least one bent portion. 
     
     
         13 . An air conditioning apparatus according to  claim 1 , wherein the heat exchanger has an inverted V-shape or an M-shape. 
     
     
         14 . An air conditioning apparatus, comprising:
 a unit main body;   a heat exchanger; and   at least one blower fan,   wherein the heat exchanger is arranged on an upstream side of the blower fan,   wherein the blower fan comprises an impeller, a motor, and a fan casing,   wherein the impeller comprises a turbofan that sucks air from an upper portion thereof and blows out the air radially outward,   wherein a rotation axis of the impeller is directed to a unit height direction,   wherein the fan casing has a fan air inlet formed in an upper surface thereof, and has a fan air outlet formed in a lower surface thereof, and   wherein an impeller air outlet of the impeller is covered by side surfaces of the fan casing,   wherein an outer diameter (φDb 1 ) of each of the blades on the side plate side is larger than an outer diameter (φDb 2 ) of each of the blades on the main plate side.