High performance louvered fin for a heat exchanger

A high performance louvered fin for a heat exchanger comprising:

• a base wall extending longitudinally to form a strip having a longitudinal axis;
• a plurality of entrance louvers in said base wall extending outwardly at a predetermined angle in a first direction from said base wall;
• a plurality of exit louvers in said base wall extending outwardly at a predetermined angle in a second direction from said base wall reversed from the first direction;
• said entrance louvers and said exit louvers extending in a direction parallel to the longitudinal axis and being spaced laterally;
• and
• a turnaround rib in said base wall extending laterally and generally perpendicular to the longitudinal axis between said entrance louvers and said exit louvers;
• and
• wherein said entrance louvers extend above and below a plane of said base wall.

A high performance louvered fin for a heat exchanger comprising:

• a base wall extending longitudinally to form a strip having a longitudinal axis;
• a plurality of entrance louvers in said base wall extending outwardly at a predetermined angle in a first direction from said base wall;
• a plurality of exit louvers in said base wall extending outwardly at a predetermined angle in a second direction from said base wall reversed from the first direction;
• said entrance louvers and said exit louvers extending in a direction parallel to the longitudinal axis and being spaced laterally;
• and
• a turnaround rib in said base wall extending laterally and generally perpendicular to the longitudinal axis between said entrance louvers and said exit louvers;
• and
• wherein said exit louvers extend above and below a plane of said base wall.

A high performance louvered fin for a heat exchanger comprising:

• a base wall extending longitudinally to form a strip having a longitudinal axis;
• a plurality of entrance louvers in said base wall extending outwardly at a predetermined angle in a first direction from said base wall;
• a plurality of exit louvers in said base wall extending outwardly at a predetermined angle in a second direction from said base wall reversed from the first direction;
• said entrance louvers and said exit louvers extending in a direction perpendicular to the longitudinal axis and being spaced laterally;
• and
• a plurality of split louvers extending laterally and generally parallel to the longitudinal axis, one of said entrance louvers and one of said exit louvers being formed on one of said split louvers;
• and
• wherein said split louvers are twisted to form one of said entrance louvers above a plane of said base wall and one of said exit louvers below a plane of said base wall.

A high performance louvered fin for a heat exchanger comprising:

• a base wall extending longitudinally to form a strip having a longitudinal axis;
• a plurality of entrance louvers in said base wall extending outwardly at a predetermined angle in a first direction from said base wall;
• a plurality of exit louvers in said base wall extending outwardly at a predetermined angle in a second direction from said base wall reversed from the first direction;
• said entrance louvers and said exit louvers extending in a direction parallel to the longitudinal axis and being spaced laterally and extending above and below a plane of said base wall;
• and
• a turnaround rib in said base wall extending laterally and generally perpendicular to the longitudinal axis between said entrance louvers and said exit louvers.

A heat exchanger comprising:

• a plurality of tubes;
• a plurality of high performance louvered fins disposed between each of said tubes;
• and
• each of said high performance louvered fins comprising a base wall extending longitudinally to form a strip having a longitudinal axis, a plurality of entrance louvers in said base wall extending outwardly at a predetermined angle in a first direction from said base wall, a plurality of exit louvers in said base wall extending outwardly at a predetermined angle in a second direction from said base wall reversed from the first direction, said entrance louvers and said exit louvers extending in a direction parallel to the longitudinal axis and being spaced laterally and extending above and below a plane of said base wall, and a turnaround rib in said base wall extending laterally and generally perpendicular to the longitudinal axis between said entrance louvers and said exit louvers.

A high performance louvered fin for a heat exchanger comprising:

• a base wall extending longitudinally to form a strip having a longitudinal axis;
• a plurality of entrance louvers in said base wall extending outwardly at a predetermined angle in a first direction from said base wall;
• a plurality of exit louvers in said base wall extending outwardly at a predetermined angle in a second direction from said base wall reversed from the first direction, the first direction and the second direction being parallel to the longitudinal axis;
• said entrance louvers and said exit louvers extending in a direction perpendicular to the longitudinal axis and being spaced laterally;
• and
• a twist in said base wall extending longitudinally and generally parallel to the longitudinal axis between said entrance louvers and said exit louvers.