S-bent tube cooler

Patent metadata

Field	Value
Publication number	US-10254052-B2
Application number	US-201313951870-A
Country	US
Kind code	B2
Filing date	Jul 26, 2013
Priority date	Jul 26, 2012
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

The present invention relates to a heat exchanger for exhaust gas cooling, in particular for motor vehicles. The heat exchanger includes a flow duct which is formed from heat exchange tubes being arranged in parallel to one another, and through which the exhaust gas to be cooled can flow and around which a liquid coolant can flow, and secondly includes a housing having a housing wall and tube bottoms. The housing wall and the tube bottoms delimit a flow chamber for the coolant. The heat exchange tubes being arranged so as to form a tube bundle are formed with straight sections and deflection zones, wherein the heat exchange tubes in at least two deflection zones sweep an angle of at least 90°.

First claim

What is claimed is:

1. A heat exchanger for cooling an exhaust gas comprising:
a housing having a housing wall coupled to an outlet tube bottom and an inlet tube bottom, the housing forming a flow chamber for a coolant and delimiting a flow thereof, wherein the housing further includes a coolant inlet and a coolant outlet;
a plurality of heat exchange tubes disposed within the housing and configured for conveying a flow of the exhaust gas therethrough, wherein each of the plurality of heat exchange tubes includes an inlet and an outlet, the plurality of heat exchange tubes having a plurality of deflection zones and a plurality of rectilinear sections, each of the plurality of rectilinear sections disposed adjacent and in fluid communication with at least one deflection zone, wherein the plurality of deflection zones cooperates with the plurality of rectilinear sections to cause each of the heat exchange tubes to have an S-shape, the plurality of deflection zones deflecting the flow of the exhaust gas through the plurality of heat exchange tubes and the flow of the coolant within the flow chamber;
a plurality of bypass tubes disposed within the housing and configured to convey at least a portion of the flow of the exhaust gas therethrough; and
at least two coolant flow directing means configured to divide the flow chamber for the coolant into at least three ducts to deflect the flow of the coolant, wherein each of the at least two coolant flow directing means is disposed between two adjacent rectilinear sections of each of the plurality of heat exchange tubes, wherein the inlet of each of the plurality of heat exchange tubes is disposed adjacent the coolant inlet and the outlet of each of the plurality of heat exchange tubes is disposed adjacent the coolant outlet and the plurality of bypass tubes.

2. The heat exchanger of claim 1 , wherein the plurality of deflection zones deflect the flow of the exhaust gas through the plurality of heat exchange tubes by at least an angle of 90°.

3. The heat exchanger of claim 1 , wherein the plurality of rectilinear sections and the plurality of deflection zones are one of soldered and welded to each other to form each of the plurality of heat exchange tubes into the S-shape.

4. The heat exchanger of claim 1 , wherein the plurality of heat exchange tubes is bent to form the plurality of rectilinear sections and the plurality of deflection zones to form each of the plurality of heat exchange tubes into the S-shape.

5. The heat exchanger of claim 1 , wherein the plurality of heat exchange tubes is formed from a metallic material.

6. The heat exchanger of claim 1 , wherein each of the plurality of heat exchange tubes has an outer wall, the outer wall having a surface.

7. The heat exchanger of claim 6 , wherein the surface of the outer wall of the heat exchange tubes has a groove Ruined therein, the groove helically wound in respect of a longitudinal axis of each of the plurality of heat exchange tubes.

8. The heat exchanger of claim 7 , wherein a pitch of the groove is one of constant and varying along the surface of the outer wall.

9. The heat exchanger of claim 6 , wherein an outer diameter of each of the plurality of heat exchange tubes is one of constant and varying along a longitudinal axis thereof.

10. The heat exchanger of claim 6 , wherein the surface of the outer wall of the heat exchange tubes has one of a crossed helical line, a double helical line, and a triple helical line formed therein.

11. The heat exchanger of claim 6 , wherein the surface of the outer wall of the heat exchange tubes is one of a corrugated surface and an indented surface.

12. The heat exchanger of claim 1 , wherein each of the plurality of heat exchange tubes has one of substantially rectangular cross-sectional shape and a substantially circular cross-sectional shape.

13. The heat exchanger of claim 1 , wherein the flow of the exhaust gas is divided between the plurality of heat exchange tubes and the plurality of bypass tubes.

14. The heat exchanger of claim 1 , further comprising an exhaust gas inlet adapter coupled to the housing wall and an exhaust gas outlet adapter coupled to the housing wall, the exhaust gas inlet adaptor having a first exhaust gas inlet in fluid communication with the plurality of heat exchange tubes and a second exhaust gas inlet in fluid communication with the plurality of bypass tubes, and wherein the exhaust gas outlet adapter has an exhaust gas outlet in fluid communication with the plurality of heat exchange tubes and the plurality of bypass tubes.

15. A heat exchanger for cooling an exhaust gas comprising:
a housing having a housing wall coupled to an outlet tube bottom and an inlet tube bottom, the housing forming a flow chamber for a coolant and delimiting a flow thereof, wherein the housing further includes a coolant inlet and a coolant outlet;
a plurality of heat exchange tubes disposed within the housing and configured for conveying a flow of the exhaust gas therethrough, wherein each of the plurality of heat exchange tubes includes an inlet and an outlet, each of the plurality of heat exchange tubes being bent to form one of an S-shape and W-shape, each of the plurality of heat exchange tubes having a plurality of deflection zones coupled to a plurality of rectilinear sections, the plurality of deflection zones deflecting the flow of the exhaust gas through the plurality of heat exchange tubes and the flow of the coolant within the flow chamber;
a plurality of bypass tubes disposed within the housing adjacent the plurality of heat exchange tubes and configured for conveying at least a portion of the flow of the exhaust gas therethrough, wherein the flow of the exhaust gas is divided between the plurality of heat exchange tubes and the plurality of bypass tubes; and
at least two coolant flow directing means configured to divide the flow chamber for the coolant into at least three ducts to deflect the flow of the coolant, wherein each of the at least two coolant flow directing means is disposed between two adjacent rectilinear sections of each of the plurality of heat exchange tubes, wherein the inlet of each of the plurality of heat exchange tubes is disposed adjacent the coolant inlet and the outlet of each of the plurality of heat exchange tubes is disposed adjacent the coolant outlet and the plurality of the bypass tubes.

16. The heat exchanger of claim 1 , wherein the at least three ducts of the flow chamber includes a first duct formed adjacent a first side of the housing, a second duct formed adjacent a second side of the housing arranged opposite the first side thereof, and a third duct disposed between the first duct and the second duct.

17. The heat exchanger of claim 16 , wherein each of the plurality of heat exchange tubes includes a first rectilinear section and a second rectilinear section, wherein the first rectilinear section of each of the plurality of heat exchange tubes is disposed in the first duct, the second rectilinear section of each of the plurality of heat exchange tubes is disposed in the second duct, and each of the plurality of bypass tubes is disposed in the second duct.

18. The heat exchanger of claim 17 , wherein the coolant inlet is directly fluidly coupled to the first duct of the flow chamber and the coolant outlet is directly fluidly coupled to the second duct of the flow chamber.

Assignees

• Visteon Global Tech Inc
• Hanon Systems

Inventors

• Sispera Petr
• Capelle Andreas
• Diehl Peter
• Cucuz Stojan
• Homeyer Bernd
• Stepka Petr

Classifications

• F28F1/08

  Tubular elements crimped or corrugated in longitudinal section · CPC title

• F28F9/22

  Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates · CPC title

• F28F1/00 Primary

  Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00) · CPC title

• F28D7/087

  assembled in arrays, each array being arranged in the same plane · CPC title

• F28D1/02

  with heat-exchange conduits immersed in the body of fluid · CPC title