Heat exchanger with long and short fins

A heat exchanger for an automotive vehicle comprising:

• first and second mutually spaced headers;
• a first row of tubes extending between and secured to the headers, each tube including a wall formed with a leading surface, a trailing surface and lateral surfaces interconnecting the leading surface and trailing surface, a space between adjacent tubes of the first row for carrying an air stream flowing through the heat exchanger from the leading surface toward the trailing surface, a passage enclosed by the wall for carrying fluid between the headers;
• and
• a second row of tubes extending between and secured to the headers, each tube including a wall formed with a leading surface, a trailing surface and lateral surfaces interconnecting the leading surface and trailing surface, a second space between adjacent tubes of the second row for carrying an air stream flowing through the heat exchanger from the leading surface toward the trailing surface, a passage enclosed by the wall for carrying fluid between the headers;
• each tube secured to and extending between the headers, each tube including a wall formed with a leading surface, a trailing surface and lateral surfaces interconnecting the leading surface and trailing surface, a passage enclosed by the wall for carrying fluid between the headers, and long and short planar fins, each fin secured to the wall, extending outward from the wall and parallel to a length of said tube, the plane of each long and short fin being normal to the wall, and extending between the headers, the long fins and short fins alternating along a depth of the wall.

A heat exchanger for an automotive vehicle comprising:

• a first header including a plate formed with holes and first collars, each first collar aligned with one of the holes;
• a second header including a second plate spaced from the first plate, having second holes and second collars, each second collar aligned with one of the second holes;
• tubes secured to and extending between the headers, each tube including a wall formed with a leading surface, a trailing surface and lateral surfaces interconnecting the leading surface and trailing surface, a passage enclosed by the wall for carrying fluid between the headers, a space between adjacent tubes for carrying an air stream flowing through the heat exchanger from the leading surface toward the trailing surface, and long and short planar fins, each fin secured to the wall, extending outward from the wall and parallel to a length of said tube, the plane of each long and short fin being normal to the wall, and extending between the headers, the long fins and short fins alternating along a depth of the wall;
• and
• brazed connections, each connection joining one of the first collars to one of the tubes and one of the second collars to said tube;
• wherein the tubes are arranged in first and second parallel rows, each tube of the first row including a length that extends parallel to a tube of the second row between the headers, the lateral surfaces of the tubes of the first row being parallel to the lateral surfaces of the tubes of the second row.