Heat exchanger

Abstract

A heat exchanger includes a core unit having 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. A pair of projections for sandwiching the partition plate from opposite sides in the pipe member arrangement direction is provided on an inner wall surface of the tank. The projections are formed by plastic working parts of the tank at opposite sides of a part to be held in contact with the partition plate in a direction at the pipe member arrangement direction from an outer side toward an inner side of 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:   a pair of projections for sandwiching the partition plate from opposite sides in the pipe member arrangement direction are provided on an inner wall surface of the tank; and   the projections are formed by plastic working parts of the tank at opposite sides of a part to be held in contact with the partition plate in the pipe member arrangement direction from an outer side toward an inner side of the tank.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein:
 the tank includes a core plate having 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 at opposite sides of 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 notch 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 notch portions; and   the pair of projections are formed by plastic working the tank plate and the core plate as an integral unit.   
     
     
         3 . The heat exchanger according to  claim 2 , wherein:
 parts of the partition plate to be engaged with the notch 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 notch portions; and   the partition plate includes an engaging portion to be engaged with the through hole.