Heat exchanger with improved wave junction, associated installation of air separation and method for manufacturing such an exchanger

A heat exchanger for vaporizing a refrigerant fluid by exchange of heat with a thermogenic fluid, said exchanger comprising;

• a. a plurality of parallel plates between them defining a plurality of passages designed for the flow of the refrigerant fluid or of the thermogenic fluid, wherein the plurality of parallel plates extend parallel to a second direction (x);
• b. a first corrugated fin and a second corrugated fin extending between two successive parallel plates in such a way as to define, within the one same passage, a plurality of channels extending generally parallel to a first direction (z) that is orthogonal to the second direction (x), said first and second corrugated fins comprising two adjacent edges that extend parallel to the second direction (x);
• c. at least one assembly member extending on each side of the adjacent edges so as to join said corrugated fins together;
• wherein the assembly member is forcibly engaged, on end, in at least part of a channel of the first corrugated fin and, on another end, in at least part of a channel of the second corrugated fin,
• wherein the channels and the assembly number extend roughly parallel to the first direction, said assembly member having, in at least the second direction (x) orthogonal to said first direction and prior to engagement, an external dimension that is greater than or equal to the internal dimensions of the channels in said second direction (z),
• wherein said second direction (x) extends parallel to the edges,
• wherein the assembly member is of cylindrical shape and has a given outside diameter, the ratios between the widths of the channels, measured in the second direction (x), and said outside diameter being comprised between 100 and 70%,
• wherein the outside diameter of the assembly member is comprised between 0.5 and 2 mm.