Heat exchanger

A heat exchanger comprising:

• a plurality of tubes through which refrigerants flow, the tubes being spaced away from one another;
• and
• a fin through which the tubes are perpendicularly inserted, and having a fin collar for supporting the inserted tube, a seat for supporting an outer circumference of a lower end of the fin collar, and three or more peak portions and three or more valley portions that are alternately disposed at an area defined between the tubes to cause air flow to vary at an area defined between the fin collar, heights of at least two peak portions or depths of at least two valley portions being different from each other,
• wherein the valley portions are located on a horizontal plane with reference to the air flow direction, and heights from the horizontal plane to the peak portions located between the valley portions are different from each other.

A heat exchanger comprising:

• a plurality of tubes through which refrigerants flow, the tubes being spaced away from one another;
• and
• a fin through which the tubes are perpendicularly inserted, and having a fin collar for supporting the inserted tube, a seat for supporting an outer circumference of a lower end of the fin collar, and three or more peak portions and three or more valley portions that are alternately disposed at an area defined between the tubes to cause air flow to vary at an area defined between the fin collar, heights of at least two peak portions or depths of at least two valley portions being different from each other,
• wherein the peak portions are located on a horizontal plane, and depths from the horizontal plane to the valley portions located between the peak portions are different from each other,
• wherein the depths of the outer valley portions disposed at air inlet and outlet sides are lower than those of the inner valley portions, and
• wherein a plurality of inner valley portions are located within the outer valley portions, and the heights of the inner valley portions are the same as one another.

A heat exchanger comprising:

• a plurality of tubes through which refrigerants flow, the tubes being spaced away from one another;
• and
• a fin through which the tubes are perpendicularly inserted, and having a fin collar for supporting the inserted tube, a seat for supporting an outer circumference of a lower end of the fin collar, and three or more peak portions and three or more valley portions that are alternately disposed at an area defined between the tubes to cause air flow to vary at an area defined between the fin collar, heights of at least two peak portions or depths of at least two valley portions being different from each other,
• wherein a longitudinal centerline of a pin is defined by one of the valley portions, the pin having left and right halves that are symmetrical based on the longitudinal centerline, the heights of the peak portions are increased as they go to an outer side.