Heat exchanger and air conditioner

Abstract

A heat exchanger has a plurality of flat tubes, and a plurality of fins in which the flat tubes are inserted in an orthogonal direction. Each of the fins includes a fin body, and an attachment portion to which the flat tube is attached. The fin body includes an insertion region in which the flat tube is inserted, and an extension region on the downwind side of the insertion region. A spacer configured to keep a space between the fins is formed in each of the insertion region and the extension region by cutting and bending part of the fin. The spacer of the extension region is straight behind the spacer of the insertion region on the downwind side. The spacer of the insertion region is configured such that the spacer body is tilted with respect to an airflow.

1 . A heat exchanger, comprising:
 a plurality of flat tubes arranged in parallel; and
 a plurality of plate-like fins each extending in an arrangement direction of the flat tubes, and having a cutout to which each of the flat tubes is inserted in an orthogonal direction, wherein 
   each of the fins includes a plate-like fin body, and an attachment portion with which a corresponding one of the flat tubes is brought into contact and to which the flat tube is attached, and   the fin body includes a plate-like main body, and a plurality of spacers which are formed by bending part of the fin body, continuous with the main body, and keep a space between the fins.   
     
     
         2 . The heat exchanger of  claim 1 , wherein
 the fin body has an insertion region to which the flat tube is inserted, and an extension region continuous with one end of the insertion region in an airflow direction and connecting the insertion regions together, and   the spacers are formed in both of the insertion region and the extension region.   
     
     
         3 . The heat exchanger of  claim 2 , wherein
 each of the fins is configured such that air flows from the insertion region to the extension region, and   the spacer of the extension region is straight behind the spacer of the insertion region on a downwind side of the spacer of the insertion region.   
     
     
         4 . The heat exchanger of  claim 2 , wherein
 each of the fins is configured such that air flows from the insertion region to the extension region, and   the spacer of the extension region is behind the flat tube.   
     
     
         5 . The heat exchanger of  claim 3 , wherein
 the spacer of the insertion region includes a flat plate-like spacer body bent to a right angle from the fin body, and   the spacer of the insertion region is tilted with respect to an airflow.   
     
     
         6 . The heat exchanger of  claim 3 , wherein
 each of the spacers is formed by cutting and bending part of the fin body.   
     
     
         7 . The heat exchanger of  claim 6 , wherein
 the spacer of the insertion region is cut and bent from a upwind side to a downwind side, and   the spacer of the extension region is cut and bent from the downwind side to the upwind side.   
     
     
         8 . The heat exchanger of  claim 3 , wherein
 the insertion region includes an intermediate region located between the flat tubes, and a projection region projecting toward the upwind side from the intermediate region so as to be away from the extension region, and   the spacer of the insertion region is provided in the projection region at a middle portion through which a middle line between the flat tubes passes.   
     
     
         9 . The heat exchanger of  claim 2  wherein
 the insertion region includes an intermediate region located between the flat tubes, and a projection region projecting toward the upwind side from the intermediate region so as to be away from the extension region, and 
 the spacer of the insertion region is bent from an edge of the projection region which is a parallel edge ( 43   b ) parallel to the airflow. 
 
     
     
         10 . The heat exchanger of  claim 9 , wherein
 the spacer of the insertion region includes a flat plate-like spacer body bent to a right angle from the fin body, and   the spacer of the insertion region is parallel to the airflow.   
     
     
         11 . The heat exchanger of  claim 1 , wherein
 each of the spacers is in a trapezoidal shape, and a tip of the spacer is a long side of the trapezoidal shape.   
     
     
         12 . The heat exchanger of  claim 1 , wherein
 each of the spacers is provided with a rib extending in a projection direction of the spacer.   
     
     
         13 . The heat exchanger of  claim 12 , wherein
 the rib extends from the main body of the fin body to the spacer.   
     
     
         14 . The heat exchanger of  claim 6 , wherein
 a tip of each of the spacers is off a hole that is formed in adjacent one of the fin bodies as a result of cutting and bending corresponding one of the spacers in the adjacent fin body.   
     
     
         15 . An air conditioner, comprising a refrigerant circuit in which the heat exchanger of  claim 1  is provided, wherein
 the refrigerant circuit performs a refrigeration cycle by circulating a refrigerant. 
 
     
     
         16 . The heat exchanger of  claim 4 , wherein
 the spacer of the insertion region includes a flat plate-like spacer body bent to a right angle from the fin body, and   the spacer of the insertion region is tilted with respect to an airflow.   
     
     
         17 . The heat exchanger of  claim 4 , wherein
 each of the spacers is formed by cutting and bending part of the fin body.   
     
     
         18 . The heat exchanger of  claim 5 , wherein
 each of the spacers is formed by cutting and bending part of the fin body.   
     
     
         19 . The heat exchanger of  claim 4 , wherein
 the insertion region includes an intermediate region located between the flat tubes, and a projection region projecting toward the upwind side from the intermediate region so as to be away from the extension region, and   the spacer of the insertion region is provided in the projection region at a middle portion through which a middle line between the flat tubes passes.   
     
     
         20 . The heat exchanger of  claim 5 , wherein
 the insertion region includes an intermediate region located between the flat tubes, and a projection region projecting toward the upwind side from the intermediate region so as to be away from the extension region, and   the spacer of the insertion region is provided in the projection region at a middle portion through which a middle line between the flat tubes passes.