Fin for a plate heat exchanger, methods for the manufacture of such a fin, and a heat exchanger comprising such a fin

A fin for a heat exchanger having brazed plates, which fin is produced from thick sheet-metal and has a pattern reproduced in a general direction (D2) in accordance with a geometric pitch (P) such that the ratio of the minimum thickness (e) of the sheet-metal to the geometric pitch (P) is greater than 0.2, characterised in that it defines a principal general direction of corrugation (D1) and comprises corrugations which follow one another in a direction (D2) substantially perpendicular to the principal general direction (D1), the corrugation comprising corrugation flanks (3) connecting corrugation peaks (5) and corrugation troughs (7), the corrugation peaks (5) and the corrugation troughs (7) defining regions for connection by brazing to respective separating plates (8) of the exchanger, and characterised in that at least some of the connection regions (5, 7) have a cross-section the width (L) of which in the transverse direction (D2) is greater than the width (1) defined by the mutually spaced faces of the two corresponding corrugation flanks (3).

A fin for a heat exchanger having brazed plates, which fin is produced from thick sheet-metal and has a pattern reproduced in a general direction (D2) in accordance with a geometric pitch (P) such that the ratio of the minimum thickness (e) of the sheet-metal to the geometric pitch (P) is greater than 0.2,

• characterised in that it defines a principal general direction of corrugation (D1) and comprises corrugations which follow one another in a direction (D2) substantially perpendicular to the principal general direction (D1), the corrugation comprising corrugation flanks (3) connecting corrugation peaks (5) and corrugation troughs (7), the corrugation peaks (5) and the corrugation troughs (7) defining regions for connection by brazing to respective separating plates (8) of the exchanger, and
• characterised in that it has beads (12) in the regions where the corrugation peaks (5) or the corrugation troughs (7) join the corrugation flanks (3).

A fin for a heat exchanger having brazed plates, which fin is produced from thick sheet-metal and has a pattern reproduced in a general direction (D2) in accordance with a geometric pitch (P) such that the ratio of the minimum thickness (e) of the sheet-metal to the geometric pitch (P) is greater than 0.2,

• characterised in that the pattern has a cross-section which has substantially the general shape of an H, and
• characterised in that the peaks and troughs (29) defined by the free ends of the H-shaped cross-section of a pattern define regions for connection by brazing to respective separating plates of the exchanger, and those regions (29) have a thickness (e′) greater than the thickness (e) of the other regions of the branches (23, 25) of the H.