Patent ID: 6253840
Filing Date: 2001-07-03
Classification: F28D,F28F

Abstract:
A heat exchanger including a refrigerant passage in which refrigerant flows in a refrigerant flow direction, for exchanging heat between the refrigerant and an air flowing outside the refrigerant passage in an air flow direction perpendicular to the refrigerant flow direction, the heat exchanger comprising:a tube defining therein the refrigerant passage;an inner fin having a plurality of partition wall portions and dividing the refrigerant passage into a plurality of sub-passages by the plurality of partition wall portions, the plurality of sub-passages including first, second, and third sub-passages so that the first sub-passage is disposed on an air flow upstream side more than the second and third sub-passages, the plurality of partition wall portions including first and second wall portions respectively dividing the first and second sub-passages and the second and third sub-passages;a first group of louvers provided on the first partition wall portion for guiding the refrigerant from the second sub-passage into the first sub-passage;a second group of louvers provided on the second partition wall portion for guiding the refrigerant from the third sub-passage into the second sub-passage, the second group of louvers being shifted from the first group of louvers in the refrigerant flow direction to avoid overlapping with the first group of louvers in the air flow direction;a plurality of first groups of louvers provided on the first partition wall portion at a first interval to define first interval spaces therebetween in the refrigerant flow direction; anda plurality of second groups of louvers provided on the second partition wall portion at a second interval to define second interval spaces therebetween in the refrigerant flow direction and to respectively face the first interval spaces in a direction perpendicular to the refrigerant flow direction;wherein each length of the first group of louvers and the second group of louvers in the refrigerant flow direction is approximately equal to that of each of the first and second intervals.