초록 ▼

A two fluid heat exchanger adapted for utilization in an exhaust gas recirculation system of an automotive internal combustion engine to reduce the temperature level of the exhaust gas from the combustion cycle that is metered from the exhaust manifold and recycled through the combustion cycle. The

A two fluid heat exchanger adapted for utilization in an exhaust gas recirculation system of an automotive internal combustion engine to reduce the temperature level of the exhaust gas from the combustion cycle that is metered from the exhaust manifold and recycled through the combustion cycle. The heat exchanger has a generally flat configuration with a first pair of flanged dished plates forming an inner chamber and a second pair of flanged dished plates encompassing the first pair of plates to form a fluid envelope around the inner chamber. The flanges of the pairs of plates are joined together with a spacing between the walls of the pairs of plates at the opposite ends with the inner flanges having openings therethrough to communicate between the upper and lower portions of the envelope. The upper plate of the second pair has an inlet opening and an outlet opening for one fluid and a central indentation between the openings to provide a flow pattern around the inner chamber, and a second fluid inlet and outlet communicate with the inner chamber.

대표청구항 ▼

A two fluid heat exchanger comprising a generally flat heat exchanger formed of two pairs of metal plates, the inner pair of plates having oppositely disposed dished portions forming a chamber and joined by peripheral flanges, the chamber having an inlet and an outlet adapted to receive a first flui

A two fluid heat exchanger comprising a generally flat heat exchanger formed of two pairs of metal plates, the inner pair of plates having oppositely disposed dished portions forming a chamber and joined by peripheral flanges, the chamber having an inlet and an outlet adapted to receive a first fluid, a heat transfer surface formed of at least one metal plate received in said chamber, and the outer pair of plates having oppositely disposed dished portions and peripheral flanges generally completely joined to the flanges of said inner plates, said outer dished portions cooperating with said inner dished portions to form a fluid envelope generally encompassing the chamber and having an inlet and an outlet to receive a second fluid therein, at least an oppositely disposed pair of side walls of said outer dished portions are spaced from side walls of said inner dished portions, said flanges of the inner plates extend between said inner and outer side walls to divide said envelope into upper and lower portions and have openings therein to provide communication between said upper and lower envelope portions, said second fluid inlet and outlet being located in one of the outer dished portions, and a central depression is formed in the same dished portion to extend across the dished portion and divide said upper envelope portion between the inlet and outlet into generally equal halves.