Heat exchanger and method for producing a heat exchanger

A method for producing the heat exchanger comprised of at least one header tank made from metal with a base section for the connection of heat-exchange tubes, and at least one longitudinal-side section, wherein the longitudinal-side section has one or more at least essentially planar connection faces with a plurality of connection openings provided in the one or more connection faces, said openings being surrounded by integrally molded connection-tube stubs, wherein the heat exchanger comprises two header tanks, each one connected at opposite ends of two rows of heat-exchange tubes arranged behind one another, and wherein the header tanks include flow guides for the multiple diversion of fluid flow in the heat exchanger between sub-groups of heat-exchange tubes belonging to one row and sub-groups of heat-exchange tubes belonging to the other row, comprising providing a pretreated tubular body, and subjecting said tubular body to internal pressure-forming to produce said header tank having said at least essentially planar connecting faces.

A method for producing the heat exchanger comprised of at least one header tank made from metal with a base section for the connection of heat-exchange tubes, and at least one longitudinal-side section, wherein the longitudinal-side section has one or more at least essentially planar connection faces with a plurality of connection openings provided in the one or more connection faces, said openings being surrounded by integrally molded connection-tube stubs, wherein the heat exchanger comprises at least three of said at least essentially planar connection faces, and wherein said connection openings are selectively formed in less than all of said connection faces, comprising bending a pretreated sheet about longitudinal edges to form the at least one longitudinal-side section and the cover section of said header tank, and concurrently forming the sheet to form at least said connection faces.

A heat exchanger suitable for use in a vehicle air-conditioning system, comprising:

• at least one header tank made from metal with a base section for the connection of heat-exchange tubes, and at least one longitudinal-side section, wherein the longitudinal-side section has one or more at least essentially planar connection faces with a plurality of connection openings provided in the one or more connection faces, said openings being surrounded by integrally molded connection-tube stubs, wherein the heat exchanger comprises at least three of said at least essentially planar connection faces, and wherein said connection openings are selectively formed in less than all of said connection faces.