Heat exchanger

Abstract

A positioning protruding portion ( 86 b ) that protrudes toward a fluid side cup plate ( 81 ) side and is to be fitted into a positioning hole ( 81 a ) formed through the fluid side cup plate ( 81 ) is formed in a base plate ( 86 ) in a position opposite, in the stacking direction, fluid flow hole portions ( 80 b, 82 b ) formed in cup plates ( 80, 82 ) for introducing fluid (Fld) into a fluid flow layer ( 90 ) that contacts the base plate ( 86 ).

1 . A vehicle heat exchanger comprising:
 a plurality of cup plates arranged such that a first layered space into which a first heat carrier is introduced and a second layered space into which a second heat carrier is introduced are defined alternately between the plurality of cup plates when the plurality of cup plates are stacked, and in which peripheral end portions of the plurality of cup plates are fixed together in a liquid-tight manner; and   a base plate that is thicker than the cup plates and on which the cup plates are stacked in order,   wherein the vehicle heat exchanger performs heat exchange between the first heat carrier and the second heat carrier;   the plurality of cup plates is provided with a heat carrier flow hole portion to introduce the heat carrier into one of the first layered space and the second layered space;   the one of the first layered space and the second layered space contacts the base plate;   the base plate includes a positioning protruding portion;   the positioning protruding portion is arranged in a position facing the heat carrier flow hole portion, in a stacking direction of the cup plates;   the base plate contacts an end cup plate that is one of the stacked cup plates and through which a positioning hole is provided; and   the positioning protruding portion protrudes toward an end cup plate side and is fitted into the positioning hole to position the end cup plate with respect to the base plate.   
     
     
         2 . The vehicle heat exchanger according to  claim 1 , wherein the positioning protruding portion provided on the base plate has in a shape that protrudes no more than a thickness of the end cup plate, toward a side where there is the layered space that contacts the base plate. 
     
     
         3 . The vehicle heat exchanger according to  claim 1 , wherein the end cup plate is thicker than the cup plates other than the end cup plate. 
     
     
         4 . The vehicle heat exchanger according to  claim 1 , wherein a thickness of the end cup plate is a predetermined thickness set in advance as a thickness that does not require an annular protrusion to be formed by burring at the positioning hole in order to ensure strength.