Corrugated fin for integrally assembled heat exchangers

A corrugated fin for integrally assembled heat exchangers, the heat exchangers having a plurality of tubes and corrugated fins which are piled up in a state where the tubes and the corrugated fins are arranged alternately, and the corrugated fin having top portions and bottom portions, the corrugated fin comprising:

• a plurality of fin portions used for the integrally assembled heat exchangers, respectively;
• a connecting portion located on the top portion and the bottom portion and between the integrally assembled heat exchangers and connecting the fin portions with each other, the connecting portion being formed with a plurality of slits arranged only in a first line and a second line which respectively extend in a longitudinal direction of the corrugated fin so that a space is formed between the adjacent slits in the first line and between the adjacent slits in the second line, respectively, and the connecting portion being provided with at least one louver partially cut to raise between the slits in the first and second lines,
• wherein the slits in the first line and the slits in the second line traverse the top portion and the bottom portion adjacent to the top portion of the corrugated fin and extend from a first intermediate portion formed between the traversed top portion and a bottom portion adjacent to the traversed top portion and opposite to the traversed bottom portion with respect to the traversed top portion to a third intermediate portion formed between the traversed bottom portion and a top portion adjacent to the traversed bottom portion and opposite to the traversed top portion through a second intermediate portion formed between the traversed top portion and the traversed bottom portion, the first intermediate portion, the second intermediate portion and the third intermediate portion being continuously connected through the traversed top portion and the traversed bottom portion,
• and wherein the louver is formed on an intermediate portion formed between the top portion and the bottom portion so that the louver is located between the space of the slits in the first line and the space of the slits in the second line.