Heat exchanger

Abstract

A heat exchanger includes tubes arranged in a stacking direction and a tank connected to the tubes. A tube of the tubes has a pair of flat portions having flat plate shapes facing each other, and a curved portion connecting ends of the pair of flat portions. The tank includes a plate having insertion holes into which the tubes are inserted, and container. The plate has a first portion along a longitudinal direction of the tubes, and a second portion extending from an end of the first portion toward the container. When the plate is viewed in the stacking direction, a boundary between the first portion and the second portion is shifted from a boundary between each of the pair of flat portions and the curved portion toward the pair of flat portions.

1 . A heat exchanger for heat exchange between heat medium and air, the heat exchanger comprising:
 tubes arranged in a stacking direction and being tubular members inside which the heat medium flows; and   a tank connected to the tubes, wherein   a tube of the tubes has a pair of flat portions having flat plate shapes facing each other, and a curved portion connecting ends of the pair of flat portions,   a normal direction of the pair of flat portions is along the stacking direction,   the tank has a plate having insertion holes into which the tubes are inserted, and a container defines a space for storing the heat medium,   the plate has a first portion arranged such that a normal direction of the first portion is along a longitudinal direction of the tubes, and a second portion extending from an end of the first portion toward the container,   the end of the first portion faces in an air flow direction in which the air flows, and   when the plate is viewed in the stacking direction, a boundary between the first portion and the second portion is shifted from a boundary between each of the pair of flat portions and the curved portion toward the pair of flat portions.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein
 the tubes and the tank include:   a first exchanger that performs heat exchange between a first heat medium and the air; and   a second exchanger that performs heat exchange between a second heat medium and the air,   the first exchanger and the second exchanger are arranged in the air flow direction,   the plate is one of plates, and   one of the plates provided in the first exchanger and another of the plates provided in the second exchanger are adjacent two plates and connected to be integrated to each other via a connecting portion.   
     
     
         3 . The heat exchanger according to  claim 2 , wherein
 the connecting portion includes:
 two third portions extending from, respectively, ends of second portions of the adjacent two plates, the ends of second portions facing away from first portions of the adjacent two plates, the two third portions extending in normal directions of the first portions; and 
 a fourth portion that is curved so as to connect ends of the two third portions, the ends of the two third portions facing away from the second portions of the adjacent two plates. 
   
     
     
         4 . The heat exchanger according to  claim 3 , wherein
 lengths of the two third portions in the normal directions of the first portions are 0.8 mm or more.   
     
     
         5 . The heat exchanger according to  claim 3 , wherein
 each of the adjacent two plates has a fifth portion extending in the normal direction of the first portion,   the fifth portion faces one of the two third portions in the air flow direction, and   the fifth portion and the two third portions are joined to the container.   
     
     
         6 . The heat exchanger according to  claim 5 , wherein
 a length of the fifth portion in the normal direction of the first portion is longer than lengths of the two third portions in the normal direction of the first portion.   
     
     
         7 . The heat exchanger according to  claim 1 , wherein
 the second portion has a bent portion protrudes toward an inside of the tank.