FIN COLLAR AND METHOD OF MANUFACTURING

摘要

A METHOD FOR FORMING AN HEAT EXCHANGER FIN COLLAR FOR A PLATE-FIN HEAT EXCHANGER HAVING CLOSE TOLERANCE DIMENSIONS FOR ACHIEVING GREATER CONTACT AREA ON THE TUBE. THE FIN COLLAR (20) INCLUDES AN ELONGATED FIN PORTION (70) FOR DISSIPATING HEAT AND A LEG CONNECTED WITH THE FIN PORTION (70). THE LEG HAS A HEIGHT AND INCLUDES A STRAIGHT CONTACT PORTION SUBSTANTIALLY PERPENDICULAR TO THE FIN PORTION (70), WHEREIN THE CONTACT PORTION HAS A CONTACT HEIGHT ALONG WHICH THE CONTACT PORTION CONTACTS THE TUBE (100). THE HEIGHT IS IN THE RANGE OF 0.02 TO 0.20 CM (0.008 TO 0.080 INCHES). IT ALSO INCLUDES A FIRST CURVED END PORTION HAVING A FIRST RADIUS EXTENDING FROM A FIRST END OF THE CONTACT PORTION AND A STEPPED TRANSITIONAL PORTION (50) CONNECTING THE CONTACT PORTION AND THE ELONGATED FIN PORTION (70). THE TRANSITIONAL PORTION (50) HAS A SECOND CURVED END PORTION HAVING A SECOND RADIUS, WHEREIN THE SECOND CURVED END PORTION EXTENDS FROM THE CONTACT PORTION OPPOSITE THE FIRST END. (FIG.2)