Air conditioner

Abstract

An air conditioner includes a cross-flow fan having a cylindrical shape, and a heat exchanger disposed on an upstream side of an air flow of the cross-flow fan. The cross-flow fan includes a plurality of impellers. Each of the impellers includes a plurality of blades arranged in a circumferential direction. The heat exchanger has an inverted V-shape. A clearance is formed between the cross-flow fan and the heat exchanger. The clearance has a dimension no more than 20% of a diameter of each of the impeller. The impellers are arranged with at least one of the blades displaced between each adjacent two of the impellers. A number of the impellers arranged along a rotation axis is at least 14 and no more than 30 in the cross-flow fan. Each of the plurality of impellers being connected together to form a single, continuous unit without a gap disposed between adjacent impellers.

What is claimed is: 
     
         1 . An air conditioner comprising:
 a cross-flow fan having a cylindrical shape, the cross-flow fan including a plurality of impellers, each of the impellers including a plurality of blades arranged in a circumferential direction; and   a heat exchanger disposed on an upstream side of an air flow of the cross-flow fan with a clearance being formed between the cross-flow fan and the heat exchanger, the heat exchanger having an inverted V-shape, the clearance having a dimension no more than 20% of a diameter of each of the impellers,   the impellers being arranged with at least one of the blades displaced between each adjacent two of the impellers, and   a number of the impellers arranged along a rotation axis being at least 14 and no more than 30 in the cross-flow fan, each of the plurality of impellers being connected together to form a single, continuous unit without a gap disposed between adjacent impellers.   
     
     
         2 . The air conditioner according to  claim 1 , wherein
 the cross-flow fan includes at least 17 and no more than 25 impellers.   
     
     
         3 . The air conditioner according to  claim 1 , wherein
 a length dimension of each of the impellers in a rotation axis direction is no more than 40% of the diameter of each of the impellers in the cross-flow fan.   
     
     
         4 . The air conditioner according to  claim 1 , wherein
 the heat exchanger is disposed with the clearance no more than 10% of the diameter of each of the impellers.   
     
     
         5 . The air conditioner according to  claim 1 , wherein
 the diameter of each of the impellers is at least 90 mm and no more than 150 mm, and the cross flow fan has a number of revolutions that is at least 700 rpm and no more than 2000 rpm.   
     
     
         6 . The air conditioner according to  claim 2 , wherein
 a length dimension of each of the impellers in a rotation axis direction is no more than 40% of the diameter of each of the impellers in the cross-flow fan.   
     
     
         7 . The air conditioner according to  claim 2 , wherein
 the heat exchanger is disposed with the clearance no more than 10% of the diameter of each of the impellers.   
     
     
         8 . The air conditioner according to  claim 2 , wherein
 the diameter of each of the impellers is at least 90 mm and no more than 150 mm, and the cross flow fan has a number of revolutions that is at least 700 rpm and no more than 2000 rpm.   
     
     
         9 . The air conditioner according to  claim 3 , wherein
 the heat exchanger is disposed with the clearance no more than 10% of the diameter of each of the impellers.   
     
     
         10 . The air conditioner according to  claim 3 , wherein
 the diameter of each of the impellers is at least 90 mm and no more than 150 mm, and the cross flow fan has a number of revolutions that is at least 700 rpm and no more than 2000 rpm.   
     
     
         11 . The air conditioner according to  claim 4 , wherein
 the diameter of each of the impellers is at least 90 mm and no more than 150 mm, and the cross flow fan has a number of revolutions that is at least 700 rpm and no more than 2000 rpm. #