Heat Exchanger

Abstract

Provided is a heat exchanger in which drainage performance of a tube and a fin is improved while preventing reduction in heat exchange efficiency. The heat exchanger includes: a tube having flat surfaces opposed to each other at a predetermined interval; and a fin including a bent portion and a flat portion which are alternately formed in a longitudinal direction, the bent portion being joined to the opposing flat surfaces of the tube. The fin has a predetermined lateral range (bent portion) in the bent portion which is brought into contact with one of the opposing flat surfaces, the predetermined lateral range being bent toward another of the opposing flat surfaces and joined to the another of the opposing flat surfaces, thereby forming a communication path.

1 .- 4 . (canceled) 
     
     
         5 . A heat exchanger, comprising:
 a tube having surfaces opposed to each other at a predetermined interval; and   a fin including a bent portion and a flat portion which are alternately formed in a longitudinal direction, the bent portion being joined to the opposing surfaces of the tube,   wherein the fin has a predetermined lateral range in the bent portion which is brought into contact with one of the opposing surfaces, the predetermined lateral range being bent toward another of the opposing surfaces and joined to the another of the opposing surfaces, thereby forming a communication path.   
     
     
         6 . A heat exchanger according to  claim 5 , wherein the fin is provided with longitudinal cutting lines within the predetermined lateral range of the bent portion so that a part formed by the longitudinal cutting lines is bent toward the another of the opposing surfaces and joined to the another of the opposing surfaces, thereby forming the communication path. 
     
     
         7 . A heat exchanger according to  claim 5 , wherein the communication path is provided in each of the bent portion which is brought into contact with the one of the opposing surfaces, and the bent portion which is brought into contact with the another of the opposing surfaces. 
     
     
         8 . A heat exchanger according to  claim 6 , wherein the communication path is provided in each of the bent portion which is brought into contact with the one of the opposing surfaces, and the bent portion which is brought into contact with the another of the opposing surfaces. 
     
     
         9 . A heat exchanger according to  claim 7 , wherein the communication path provided in the bent portion which is brought into contact with the one of the opposing surfaces has a lateral range which overlaps with a lateral range of the communication path provided in the bent portion which is brought into contact with the another of the opposing surfaces. 
     
     
         10 . A heat exchanger according to  claim 8 , wherein the communication path provided in the bent portion which is brought into contact with the one of the opposing surfaces has a lateral range which overlaps with a lateral range of the communication path provided in the bent portion which is brought into contact with the another of the opposing surfaces.