초록 ▼

A heat exchanger with a plurality of stacked flat tubes and a collecting tank having a wall extending around the entire periphery of, and connected to, the end of the stacked flat tubes. A first medium may be distributed through the collecting tank and flat tubes. Internal inserts are in the flat tu

A heat exchanger with a plurality of stacked flat tubes and a collecting tank having a wall extending around the entire periphery of, and connected to, the end of the stacked flat tubes. A first medium may be distributed through the collecting tank and flat tubes. Internal inserts are in the flat tubes, with the inserts being bonded between the broad sides of the tubes and, in the region of connection of the tubes to the collecting tank, being configured to compensate for length changes in the stacking direction caused by temperature changes, as by recesses in connectors such as wave flanks or by corrugated wave flanks. The flat tubes with inserts such as described may be separately provided for use in manufacture of heat exchangers.

대표청구항 ▼

1. A heat exchanger, comprising: a plurality of stacked flat tubes, said tubes having facing broad sides adjacent one another in the stacking direction and first and second open ends;a collecting tank connected to at least one of the first and second open ends of said stacked flat tubes at a first c

1. A heat exchanger, comprising: a plurality of stacked flat tubes, said tubes having facing broad sides adjacent one another in the stacking direction and first and second open ends;a collecting tank connected to at least one of the first and second open ends of said stacked flat tubes at a first connection plane, said first connection plane defined by a tube plate; andinternal inserts in said flat tubes, the inserts having wave crests and troughs defining flanks therebetween extending in a direction substantially parallel to a flow path of a first medium from the first to the second open end of the plurality of flat tubes, the inserts being bonded between said broad sides of said tubes at the wave crests and troughs, and including a corrugation extending in parallel to the flow path along at least one of the flanks from said at least one of the first and second open ends and terminating at a point proximal to the first connection plane, the flank flexing in the stacking direction at the corrugation during thermal cycling, wherein at least one of the flanks is continuous along a substantial portion of the flow path beyond the tube plate. 2. The heat exchanger of claim 1, wherein said internal inserts comprise corrugated sheets with flanks extending between facing broad sides of a tube, and said flanks are flexible in the stacking direction. 3. The heat exchanger of claim 2, wherein said flanks include multiple corrugations extending in parallel to the flow path. 4. The heat exchanger of claim 1, further comprising a second collecting tank connected to the other end of said stacked flat tubes whereby the first medium may be distributed through said second collecting tank and flat tubes, said second collecting tank connected to said other end of said stacked flat tubes at a second connection plane, the second connection plane defined by a tube plate, wherein said internal inserts are further configured to compensate for length changes in the stacking direction cause by temperature changes in the region of the second connection plane. 5. The heat exchanger of claim 1, further comprising outwardly extending embossings on said tube broad sides, said embossings of adjacent tubes in said tube stack maintaining a spacing between adjacent broad sides to define a flow channel for a second medium between said adjacent sides. 6. The heat exchanger of claim 1, further comprising matching tube pieces inserted into the ends of the heat exchanger tubes to reinforce the heat exchanger tubes. 7. The heat exchanger of claim 1, wherein said collecting tank: has a first selected one of an input and an output for communication of said first medium with said tubes;is connected to a section of said tube stack bounded by two connection planes and communicating with flow paths defined between said tubes; andhas a second selected one of an output and an input for communication of a second medium with said tube stack section. 8. The heat exchanger of claim 7, wherein a tube plate with connectors receiving said tube stack end defines one of said connection planes, wherein said tube plate is connected to the wall of the collecting tank. 9. The heat exchanger of claim 8, wherein said broad sides of said tubes include deformations extending into said flow paths defined between said tubes to direct a portion of the flow of the second medium to the tube plate in order to cool it. 10. The heat exchanger of claim 7, wherein the other of said connection plates is defined by the wall of said collecting tank, said wall defining said other connection plane having a cut-out having a peripheral contour of the stack of heat exchanger tubes. 11. The heat exchanger of claim 10, wherein the peripheral contour includes slits receiving edge flanges of said tubes and protrusions extending into grooves formed between adjacent tubes in said stacked tubes. 12. The heat exchanger of claim 1, wherein said heat exchanger is selected from the group consisting of a charge air cooler and an exhaust heat exchanger cooled with fluid in the exhaust gas recirculation system of vehicles. 13. A heat exchanger, comprising: a plurality of stacked flat tubes, said tubes having facing broad sides adjacent one another in the stacking direction and first and second open ends;a collecting tank connected to one of the first and second open ends of said stacked flat tubes, at a connecting plane, the connecting plane defined by a tube plate;an internal insert positioned within at least one of said flat tubes, the insert having wave crests and troughs defining flanks therebetween extending in a direction substantially parallel to the flow path of a first medium from the first to the second open end of the at least one tube, the wave crests and troughs of said insert being bonded to said broad sides of said at least one tube, said insert including a corrugation extending in parallel to the flow path along at least one flank from said at least one of the first and second open ends and terminating at a point beyond the connecting plane,wherein the at least one flank is continuous along a substantial portion of the flow path between the first and second open ends. 14. The heat exchanger of claim 13, wherein the flank flexes in the stacking direction at the corrugation during thermal cycling. 15. The heat exchanger of claim 13, wherein each flank of the insert includes the corrugation. 16. The heat exchanger of claim 13, wherein the first medium is exhaust gas. 17. The heat exchanger of claim 13, and further comprising a second collecting tank connected to the other of the first and second open ends of said stacked flat tubes. 18. The heat exchanger of claim 13, wherein the second collecting tank defines a second connecting plane, said insert including a corrugation extending in parallel to the flow path along the at least one flank from the other of the first and second open ends and terminating at a point beyond the second connecting plane. 19. The heat exchanger of claim 13, wherein the at least one flank is flat along a substantial portion of the flow path between the first and second collecting tanks. 20. A heat exchanger, comprising: a plurality of stacked flat tubes, said tubes having facing broad sides adjacent one another in the stacking direction and first and second open ends;a collecting tank connected to one of the first and second open ends of said stacked flat tubes, said collecting tank defining a connecting plane;an internal insert positioned within at least one of said flat tubes, the insert having wave crests and troughs defining flanks therebetween extending in a direction substantially parallel to the flow path of a first medium from the first to the second open end of the at least one flat tube, the wave crests and troughs of said insert being bonded to said broad sides of said at least one flat tube, said insert including a configuration localized to the region of the connecting plane which compensates for length changes in the stacking direction caused by temperature changes. 21. The heat exchanger of claim 20, wherein each flank includes a configuration localized to the region of the one connecting plane to compensate for length changes in the stacking direction caused by temperature changes. 22. The heat exchanger of claim 20, wherein the first medium is exhaust gas. 23. The heat exchanger of claim 20, and further comprising a second collecting tank connected to the other of the first and second open ends of said stacked flat tubes. 24. The heat exchanger of claim 21, wherein the second collecting tank defines a second connecting plane, said insert including a corrugation extending in parallel to the flow path along the at least one flank from the other of the first and second open ends and terminating at a point beyond the second connecting plane. 25. The heat exchanger of claim 23, wherein the at least one flank is flat along a substantial portion of the flow path between the first and second collecting tanks. 26. A heat exchanger, comprising: a plurality of stacked flat tubes, said tubes having facing broad sides adjacent one another in the stacking direction and first and second open ends;an internal insert positioned within at least one of said flat tubes, the insert having wave crests and troughs defining flanks therebetween extending in a direction substantially parallel to a flow path of a first medium between the first and second open ends of the at least one tube, the wave crests and troughs of said insert being bonded to said broad sides of said at least one tube, at least one of the wave flanks including a corrugation extending in parallel to the flow path from the first open end to a termination point between the first and second open ends, said corrugation providing said insert with increased flexibility in the stacking direction in a region from the first open end to the termination point; anda collecting tank receiving said stacked flat tubes at a connection plane, said connection plane being located in the region of increased flexibility,wherein at least one of the flanks is continuous along a substantial portion of the flow path. 27. The heat exchanger of claim 1, wherein the corrugation terminates at a point in the first connection plane.