An aluminum alloy brazing sheet, a manufacturing method therefor, and a manufacturing method for an automotive heat exchanger. The aluminum alloy brazing sheet includes an aluminum alloy core material, a first brazing material that is clad to one surface of the core material, and a second brazing material that is clad to the other surface of the core material. The core material, the first brazing material, and the second brazing material each include a respective prescribed aluminum alloy. A count of an Al—Si—Fe intermetallic compound having an equivalent circle diameter of 0.5 to 80.0 μm in the second brazing material is less than or equal to 2,000 particles per mm.sup.2.

A heat exchange tube, a heat exchanger, and a manufacturing method for the heat exchange tube are provided. The heat exchange tube includes a tube wall and an outer fin, the tube wall is folded into a tube body, the tube body is provided with an inner fin therein, and the inner fin divides an inner chamber of the tube body into a plurality of flow channels. The outer fin is arranged outside the tube body. The outer fin is folded from a same plate with at least one of the tube wall and the inner fin.

The invention relates to a heat exchanger tube produced by bending a metal strip (11), characterized in that said strip (11) has a thickness that can vary between at least one first thickness (e.sub.1) and at least one second thickness (e.sub.2) greater than said first thickness (e.sub.1), and in that said tube has thinned first zones (Z1) and reinforced second zones (Z2) located at the points of greatest mechanical stress, said first zones (Z1) being formed by first portions (P1) of said strip of first thickness (e.sub.1) and said reinforced second zones (Z2) being formed by second portions (P2) of said strip (11) of second thickness (e.sub.2). The invention also relates to a heat exchanger comprising a core bundle of such tubes, and to a method of obtaining such a tube.

Fluid circulation tube and heat exchanger equipped with tubes of this type are disclosed. The tube (6) is produced by bending, and, once its wall has been bent, has a base portion (12) prolonged laterally by two linking portions (13) leading to two top portions (14) turned toward one another, which terminate in end legs (15) turned toward the base portion (12), forming at least two parallel longitudinal internal channels (16) into which the two systems (20) of bends (21) of a corrugated disrupter (17) can be inserted, these systems being interconnected by a central part (23) inserted into a gap left between said legs and the base portion.

A heat exchange tube includes a pair of opposed facing surfaces, and an obliquely protruding part formed on at least one of the pair of facing surfaces, wherein a plurality of the obliquely protruding parts are obliquely formed to be alternately opposite in a width direction of a flow path of the heat exchange fluid, and the plurality of the obliquely protruding parts are mutually connected to form connecting parts, and when hp represents a height of the flow path of the heat exchange fluid and Wv represents a width of the obliquely protruding part in a direction orthogonal to the flow direction of the heat exchange fluid in the flow path, Wv/hp being a ratio of the width of the obliquely protruding part to the height of the flow path is equal to or greater than 1.5 and is equal to or smaller than 6.0.

A heat exchanger includes multiple tubes and multiple fins. Each of the tubes has a tubular shape extending in a horizontal direction. Each of the fins is disposed between adjacent ones of the tubes in a vertical direction vertical to the horizontal direction. Each of the fins is corrugated and includes bent portions located near the adjacent ones of the tubes and flat plate portions each of which extends in the vertical direction to connect between two of the bent portions. Each of the fins includes a pair of slits and an offset portion. At least a portion of the pair of slits extends to one of the bent portions. The offset portion is formed by having a portion of each of the fins between the pair of slits recessed inward of the one of the bent portions.

A heat exchange tube and a heat exchanger are provided. A tube wall of the heat exchange tube includes a first wall and a second wall, a first segment of the first wall includes one of a first groove or a first protrusion, a second segment of the first wall includes one of a second groove or a second protrusion, a first segment of the second wall includes the other one of the first groove or the first protrusion, the first protrusion is arranged in the first groove, the second segment of the second wall includes the other one of the second groove or the second protrusion, and the second protrusion is arranged in the second groove. At least part of each of the first segment and the second segment of the first wall is arranged between the first segment and the second segment of the second wall.

An aluminum alloy heat exchanger includes a core material formed of an aluminum alloy including Mn of 0.60 to 2.00 mass % and Cu of 1.00 mass % or less, with the balance being Al and inevitable impurities, and a sacrificial anode material formed of an aluminum alloy including Zn of 2.50 to 10.00 mass %, with the balance being Al and inevitable impurities. Pitting potential of a sacrificial anode material surface of a tube of the aluminum alloy heat exchanger in a 5% NaCl solution is 800 (mV vs Ag/AgCl) or less, and pitting potential of an aluminum fin of the aluminum alloy heat exchanger in a 5% NaCl solution is equal to or more than the pitting potential of the sacrificial anode material surface of the tube of the aluminum alloy heat exchanger in a 5% NaCl solution.

A heat exchanger is configured to exchange heat between a heat medium and an air. The heat exchanger includes a tube through which the heat medium flows therein, and a fin that is formed by bending a metal plate and that is brazed to a surface of the tube. The fin includes a louver. The surface of the tube defines an introducing groove configured to introduce a brazing material melted at brazing from a connecting portion between the tube and the fin to an other portion.

A tube for use in a heat exchanger comprises a first portion spaced apart from a second portion. At least one reinforcing structure having a non-circular cross-sectional shape extends between the first portion and the second portion to divide a flow of a fluid through the tube into a first flow channel to one side of the at least one reinforcing structure and a second flow channel to a second side of the at least one reinforcing structure. A fluid communication channel provides fluid communication between the first flow channel and the second flow channel. The fluid communication channel is at least one of a) formed through the at least one reinforcing structure and b) formed between two adjacent ones of the reinforcing structures.