Patent ID: 6173764
Filing Date: 2001-01-16
Classification: F28D,F28F

Abstract:
A laminated heat exchanger comprising:a plurality of tube elements, each of said tube elements having a pair of tank portions and a passage portion communicating between said pair of tank portions, said tube elements being laminated in a plurality of levels along a direction of lamination; anda plurality of fins disposed between said tube elements, respectively, wherein:said tube elements include a first tube element which is located at a specific position in said direction of lamination, and said first tube element has an intake portion extending from one of said pair of tank portions thereof;said tube elements further include a second tube element which is located at a specific position in said direction of lamination, and said second tube element has an outlet portion extending from one of said pair of tank portions thereof;a first flow portion is located between said tank portion with said intake portion and said passage portion of said first tube element;a second flow portion is located between said tank portion with said outlet portion and said passage portion of said second tube element;said tube elements that are not directly connected to intake portion or said outlet portion have remaining flow portions that are located between said tank portions and said passage portions, respectively;a cross-sectional area of said first flow portion is smaller than each cross-sectional area of said remaining flow portions; anda cross-sectional area of said second flow portion is smaller than each cross-sectional area of said remaining flow portions.