Heat exchanger

Abstract

A heat exchanger includes a core unit having a plurality of pipe members arranged in parallel, a pair of tanks joined to the core unit to sandwich the core unit from opposite sides in a longitudinal direction of the pipe members and communicating with the pipe members, and a partition plate for closing a cross-section of the tank. The partition plate includes a recess on an outer edge portion to be held in contact with an inner wall surface of the tank, the tank includes a projection to be engaged with the recess on the inner wall surface, and the projection and the recess are formed by plastic working a part of the tank in contact with the partition plate from an outer side toward an inner side of the tank in a state where the partition plate is arranged in the tank.

1 . A heat exchanger, comprising:
 a core unit including a plurality of pipe members open at opposite ends and arranged in parallel;   a pair of tanks joined to the core unit to sandwich the core unit from opposite sides in a longitudinal direction of the pipe members and communicating with the pipe members; and   a partition plate for closing a cross-section of the tank intersecting with a pipe member arrangement direction,   wherein:   the partition plate includes a recess on an outer edge portion to be held in contact with an inner wall surface of the tank;   the tank includes a projection to be engaged with the recess on the inner wall surface; and   the projection and the recess are formed by plastic working a part of the tank in contact with the partition plate from an outer side toward an inner side of the tank in a state where the partition plate is arranged in the tank.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein:
 the tank includes a core plate composed of a bottom portion with a row of openings, through which the pipe members of the core unit are inserted, and a pair of wall portions arranged to sandwich the row of the openings in a direction perpendicular to an arrangement direction of the openings and extending in a direction opposite to the core unit from the bottom portion, and a tank plate joined to the pair of wall portions to form a tank space together with the core plate;   the tank plate includes a cut portion on each of a pair of edge portions to be joined to the pair of wall portions;   the partition plate is engaged with the cut portions; and   the recesses are formed in parts of the partition plate to be engaged with the cut portions.   
     
     
         3 . The heat exchanger according to  claim 2 , wherein:
 the parts of the partition plate to be engaged with the cut portions serve as a pair of projecting portions projecting toward each of the pair of wall portions; and   the core plate includes stepped portions on which the projecting portions are to be seated.   
     
     
         4 . The heat exchanger according to  claim 2 , wherein:
 the tank plate includes a through hole on a line connecting the pair of cut portions; and   the partition plate includes an engaging portion to be engaged with the through hole.