Patent ID: 6540015
Filing Date: 2003-04-01
Classification: F25B,F28D,F28F,Y10S

Abstract:
A heat exchanger comprising:a first tube defining therein a first fluid passage in which a first fluid flows; and a second tube contacting the first tube and defining therein a second fluid passage in which a second fluid flows, wherein the first tube has a first joint surface brazed to a second joint surface of the second tube; wherein: a groove is provided on the first joint surface to divide the first joint surface into at least two regions such that the first joint surface is brazed to the second joint surface at the regions other than the groove; the first fluid passage defined in the first tube serpentines to cross perpendicularly a second fluid direction in which the second fluid flows in the second fluid passage; the first tube includes a plurality of first tube bodies each contacting the second tube and each having a longitudinal direction perpendicular to that of the second tube; the first fluid flows in each of the plurality of first tube bodies in a first fluid direction perpendicular to the second fluid direction and parallel to the longitudinal direction of each of the plurality of first tube bodies; and the plurality of first tube bodies form a plurality of heat exchange cores with the second tube, the plurality of heat exchange cores being arranged in a direction approximately perpendicular to both the first fluid direction and the second fluid direction.