The present invention relates to a heat exchanger having a means for reducing thermal stress. An object of the present invention is to provide an integrated heat exchanger configured to cool two types of heat exchange media having different temperatures, the heat exchanger having a means for reducing thermal stress and having a flow distribution structure in a tank in order to effectively disperse thermal stress caused by a temperature difference.

A heat exchanger includes a header, a tank and a gasket between the header and the tank. The gasket at least includes one portion protruding from the header, which is in sealing engagement with a portion of the tank. In some embodiments, the portion protruding from the header may include a V-shaped or U-shaped groove that is open to the portion of the tank.

The present invention relates to a heat exchanger having a header structure for dispersing thermal stress. The purpose of the present invention is to provide a heat exchanger having a header structure for dispersing thermal stress, wherein the heat exchanger improves the structure of a tube insertion hole on a header so as to disperse as much thermal stress as possible, by focusing on the fact that thermal stress concentration mainly occurs in a tube nose.

In a tank structure of a heat exchanger having a narrow width header plate, to reduce thermal stress generated in a tube on the outermost side of the header plate in a lengthwise direction. Insertion holes, except for end-portion tube insertion holes at least located at end portions of a header plate in the lengthwise direction, are linked with deformation prevention beads formed along the lengthwise direction of the header plate, and the end-portion tube insertion holes are not linked with the deformation prevention beads.

Provided are a housing assembly and a water heater. The housing assembly includes a bottom plate assembly and an outer housing. The outer housing is provided with a hooking fitting portion, the bottom plate assembly includes: a base and a supporting portion, a crimping space for positioning the outer housing is formed between at least portion of the supporting portion and the base. The hooking fitting portion is hooked with the crimping space.

The invention relates to a heat exchanger collector box (3) including: a collector plate (11) having holes respectively lined by collars (19) for passage of ends of heat exchange tubes (7), a sealing means (13), and a cover closing the collector box (3). According to the invention, the sealing means (13) includes at least one support face (29) and is arranged on the collector plate (11) such that: the support face (29) is arranged abutting and under tension against one of the collars (19) when the sealing means (13) is assembled with the collector plate (11), and in the compressed state, the sealing means (13) is kept away from the ends of the heat exchange tubes (7) by interposing collars (19) between the sealing means (13) and the ends of said tubes (7).

A heat exchanger (1) includes a heat exchanging body (20) disposed within an outer box (10). A supply pipe (21) and a discharge pipe (22) in fluid communication with the heat exchanging body (20) respectively extend through first and second insertion holes (31, 32) in the outer box (10). Elastic seal members (40; 240) are respectively provided around the supply pipe (21) and the discharge pipe (22) and between a first sidewall (11) of the outer box (10) and the heat exchanging body (20). At least one biasing member (50; 250) exerts a lateral biasing force (F1; F2) on the elastic seal members (40; 240), thereby maintaining the elastic seal members (40; 240) in a state of compressive deformation and contacting the outer box (10) and the heat exchanging body (20) in an air-tight manner to block potential leakage paths (LP1; LP2) via the insertion holes (31, 32).

A heat exchanger includes: tubes stacked in a stacking direction, through which fluid flows; and a tank having a core plate to which each of the tubes is connected. The tank has a first space and a second space separated from each other and arranged in the stacking direction to store fluid. The core plate has insertion holes arranged in the stacking direction, through which the tubes are respectively inserted. The core plate has a boundary portion opposing a boundary between the first space and the second space. The core plate has a rigid portion that overlaps at least one of the insertion holes at a position adjacent to the boundary portion so as to increase a rigidity of the core plate.

An annular seal for a motor vehicle heat exchanger is configured to be stretched between two opposite supports that the annular seal surrounds. The annular seal includes two opposite support parts that cooperate with the two supports, two connecting parts joining the support parts together, and an annular bead that deforms elastically by axial compression perpendicular to a plane parallel to the annular shape of the seal. Additionally, said annular bead is extending in the support and connecting parts. Further, the cross section of the annular bead between each support part and the connecting parts to which the annular bead is joined changes such that a radial dimension of the annular bead, measured in a median plane of the seal parallel to the annular shape of the seal, is smaller in the support part than in the connecting parts.

An aluminum alloy material comprises: Si: less than 0.2 mass %, Fe: 0.1 to 0.3 mass %, Cu: 1.0 to 2.5 mass %, Mn: 1.0 to 1.6 mass %, and Mg: 0.1 to 1.0 mass %, the balance being Al and incidental impurities. A number density of Al—Mn compound having a circle equivalent diameter of not less than 0.1 μm is not less than 1.0×10.sup.5 mm.sup.−2, and a number density of Al.sub.2Cu having a circle equivalent diameter of not less than 0.1 μm is not more than 1.0×10.sup.5 mm.sup.−2.