Abstract: A method is provided for manufacturing a bundle of plates for a heat exchanger made up of a stack of plates. The method includes reducing by machining the initial thickness of each plate by making at least at the periphery of the plate, at least one connecting shoe having a height greater than the thickness of the machined plate, forming on the central portion of the plate, corrugations, to be superposed pairwise on the plates, connecting the shoes in contact with the plates of each pair through a weld bead, superposing the pairs of plates and connecting the shoes in contact with the pairs of plates through a sealed weld bead by arranging a superposition of open or closed ends for alternate inflow or outflow of said fluid.

Abstract: Plate (1) suitable for acting as a bulkhead between two fluids flowing in a plate heat exchanger, the plate (1) having a plurality of corrugations (2) each having a bottom crest line and a top crest line, all or part of the corrugations (2) of the plate (1) locally having stiffeners (5) formed by a substantial and local reduction of the height of the top crest line, the stiffeners (5) being arranged in a first group (20) of stiffeners (5) distributed on the plate (1) along at least one first line (6) parallel to a diagonal (10) of the plate (1), the diagonal (10) being perpendicular to the crest lines (3, 4) of the corrugations (2), the stiffeners (5) of the first group (20) being alternately arranged on either side of the first line (6) on each consecutive corrugation (2), wherein the distance measured perpendicularly to the first line (6) between the centre of the stiffeners (5) of the first group (20) and the first line (6) is the same for each stiffener (5) of the first group (20).

Abstract: Plate (1) intended to form a partition between two fluids circulating inside a welded heat exchanger, the plate (1) having a plurality of undulations (2) characterised in that all or part of the undulations (2) has, on at least one upper crest line (3), at least one preferred contact area (4) that has a height above a nominal height of the undulations (2) of the plate (1), the at least one preferred contact area (4) being intended to come into contact with a lower crest line of an undulation of another plate provided above the plate (1) and to be deformed when the exchanger is manufactured.

Abstract: A heat exchanger comprises a set of plates defining between them circuits for a fluid flowing alternately via seals mounted between each pair of two adjacent plates. Each plate including at least one guiding cut formed at least at one of the ends thereof for guiding each plate inside a frame. The exchanger also includes between each pair of two adjacent plates, and in proximity to the guiding cut, at least one strut to be compressed and in contact with the two adjacent plates. Each strut has, before compression, a thickness at least equal to that of the seal.