초록 ▼

A heat exchanger with an external bypass is formed by a core portion including a plurality of stacked tubular members and a corrugated bypass tube positioned substantially parallel to the core portion. A first set of flow passages is defined within the tubular members for the flow of a first fluid t

A heat exchanger with an external bypass is formed by a core portion including a plurality of stacked tubular members and a corrugated bypass tube positioned substantially parallel to the core portion. A first set of flow passages is defined within the tubular members for the flow of a first fluid therethrough, and a second set of flow passages is defined between adjacent tubular members as the tubular members are stacked together to form the core portion. A pair of external end plates is sealingly attached to transverse end wall portions of the stacked tubular members and to the ends of the bypass tube thereby forming the heat exchanger with an external bypass that comprises a single unit that can be brazed or joined together in a single operation.

대표청구항 ▼

What is claimed is: 1. A heat exchanger, comprising: a plurality of stacked tubular members defining a first set of flow passages therethrough, the tubular members having a boss portion located at each end thereof, said boss portions defining respective inlet and outlet openings, the respective inl

What is claimed is: 1. A heat exchanger, comprising: a plurality of stacked tubular members defining a first set of flow passages therethrough, the tubular members having a boss portion located at each end thereof, said boss portions defining respective inlet and outlet openings, the respective inlet and outlet openings of each of said stacked tubular members communicating to define inlet and outlet manifolds for the flow of a first fluid through the first set of flow passages, the tubular members having opposed peripheral flange portions joined together in the stacked tubular members to define a second set of flow passages between adjacent tubular members for the flow of a second fluid through the heat exchanger, the tubular members having transverse end wall portions defining a sealing surface; a corrugated bypass tube located generally parallel to the plurality of stacked tubular members, the corrugated bypass tube being exposed to ambient air and having opposed end portions defining open ends for the flow of additional second fluid therethrough; a pair of external end plates located respectively at the ends of the stacked tubular members and the corrugated bypass tube, each end plate having a peripheral wall defining a first opening for allowing said second fluid to flow through said second set of flow passages, the peripheral wall being sealingly attached to the transverse end wall portions of the plurality of stacked tubular members, and each end plate defining a second opening sealingly attached to one of the end portions of the corrugated bypass tube. 2. The heat exchanger as claimed in claim 1, wherein the bypass tube opposed end portions are located in the end plate second openings. 3. The heat exchanger as claimed in claim 2, wherein the boss portions are located to one side of the longitudinal axis of the tubular members. 4. The heat exchanger as claimed in claim 1, wherein the plurality of stacked tubular members are formed with a plurality of spaced apart, inwardly disposed dimples. 5. The heat exchanger as claimed in claim 1, wherein the plurality of stacked tubular members have inwardly disposed ribs for directing the flow of said first fluid through said first set of flow channels from the inlet opening to said outlet opening. 6. The heat exchanger as claimed in claim 1, wherein the transverse end wall portions close off a portion of the second set of flow passages, and wherein the end plate peripheral wall overlaps said end wall portions of said tubular members to form lap joints. 7. The heat exchanger as claimed in claim 1, further comprising turbulizers located in the second set of flow passages defined between the adjacent tubular members. 8. The heat exchanger as claimed in claim 1, wherein the ends of the tubular members have spaced-apart projecting tabs extending outwardly therefrom, said end plates being received between said tabs. 9. The heat exchanger as claimed in claim 1, wherein the tubular members are formed from elongate plate pairs. 10. The heat exchanger as claimed in claim 9, wherein each plate comprises: a central generally planar portion, said boss portions being located on one side of the longitudinal axis of the plate and extending slightly beyond the boundary of the central, generally planar portion, said boss portions lying in a different plane than said central planar portion; a first flange portion formed around the periphery of the plate, inwardly disposed from the edges thereof, said first flange portion lying in a different plane than said central planar portion and said boss portions; a second flange portion formed along the longitudinal edges of said plate, said second flange portion lying in the same plane as said boss portions. 11. The heat exchanger as claimed in claim 10, wherein each plate is inverted and rotated 180 degrees with respect to the adjacent plate to form the plate pairs. 12. The heat exchanger as claimed in claim 10, wherein said central generally planar portion includes spaced apart inwardly disposed dimples. 13. The heat exchanger as claimed in claim 10, wherein said central generally planar portion includes inwardly disposed guide ribs for directing the flow of said first fluid longitudinally through said first set of flow channels from the inlet opening to said outlet opening. 14. The heat exchanger as claimed in claim 1 wherein the bypass tube is spaced from the stacked tubular members. 15. The heat exchanger as claimed in claim 1 wherein at least one of the bypass tube corrugations is in contact with the stacked tubular members. 16. The heat exchanger as claimed in claim 15 wherein said at least one corrugation is brazed to the stacked tubular members. 17. The heat exchanger as claimed in claim 15 wherein said at least one corrugation is not brazed to the stacked tubular members. 18. The heat exchanger as claimed in claim 1 wherein the plurality of stacked tubular members include top and bottom tubular members, the top and bottom tubular members including respectively a top plate and a bottom plate, the top and bottom plates including opposed transverse end walls located in the same plane as the tubular member transverse end wall portions, said end walls being sealingly attached respectively to the end plate peripheral walls. 19. The heat exchanger as claimed in claim 18 wherein the top and bottom plate transverse end walls and the tubular member transverse end wall portions form a continuous peripheral sealing surface attached to the end plate peripheral walls in a lap joint configuration. 20. The heat exchanger as claimed in claim 10 wherein the external end plates have spaced-apart, laterally projecting side tabs, the second flange portions of the tubular members being retained in position by said side tabs.