CAB/MAAR concept improvement

Patent metadata

Field	Value
Publication number	US-10801780-B2
Application number	US-201815875198-A
Country	US
Kind code	B2
Filing date	Jan 19, 2018
Priority date	Feb 20, 2017
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A method for manufacturing a heat exchanger, wherein a firmly bonded connection is provided between tubes and ribs in order to form a radiator matrix, the connection provided by aligning and inserting tube ends into openings in a first and second collector in order to connect tubes to the two collectors, and a wall section of shaped tube ends is bent so that the tube ends are fixed against the collector through the wall section with interpositioning of a seal.

First claim

What is claimed is:

1. A method for manufacturing a heat exchanger with the following steps:
providing a first collector and a second collector, each of the first collector and the second collector further comprising a series of openings receiving tubes therein;
forming the tubes for flowthrough of a coolant from the first collector through the tubes to the second collector, wherein each of the tubes includes a first tube end and a second tube end and a heat exchange section between the first tube end and the second tube end for transferring heat to an external medium;
placing a seal at least into the first collector, wherein the seal further comprises holes aligned with the openings;
forming a plurality of ribs;
shaping at least the first tube end of each of the tubes for forming a wall section of the tube ends which section is to be bent, wherein the shaping at least the first tube ends further comprises addition of at least one weak area on the shaped tube ends;
aligning the tubes and the ribs so the tubes are arranged parallel to each other and the ribs are arranged between the tubes;
bonding the tubes and the ribs to form a connection therebetween and define a radiator matrix;
aligning and inserting the tube ends into the openings in the first collector and the second collector to connect the tubes to the first collector and the second collector; and
bending the wall section of the shaped tube ends so the shaped tube ends are fixed against the collector through the wall section with interpositioning of the seal.

2. The method according to claim 1 , wherein the step of the bending the wall section of the shaped tube ends further comprises introduction of a bending punch into the shaped tube ends which presses the wall section against the seal.

3. The method according to claim 1 , wherein the at least one weak area is introduced by a purposeful removal of thickness in predetermined sections of the shaped tube ends.

4. The method according to claim 1 , wherein the at least one weak area is a weakening line produced by cutting or stamping a wall of the shaped tube ends.

5. The method according to claim 4 wherein the step of bending the wall section of the shaped tube ends further comprises tearing open the wall of the shaped tube ends at the at least one weak area.

6. The method according to claim 4 , wherein the addition of the at least one weak area further comprises forming a through hole in the wall of the shaped tube ends at an end of the at least one weak area facing away from the shaped tube end.

7. The method according to claim 1 , wherein the at least one weak area defines a flap as a wall section.

8. The method according to claim 4 , wherein a cross-sectional shape of the openings of the first collector and the second collector is different from a cross-sectional shape of the tube ends prior to shaping and the shaping of at least the first tube end of each of the tubes takes place before the step of inserting the tube ends into the openings in such a manner that a cross-sectional shape of the shaped tube ends corresponds to the cross-sectional shape of the openings.

9. The method according to claim 8 , wherein the shaping at least the first tube end of each of the tubes comprises introducing a punch into the tube end to be shaped.

10. The method according to claim 8 , wherein the shaping at least the first tube end of each of the tubes changes an aspect ratio (b/h) of the cross sectional shape of the tube ends prior to shaping in a direction of an aspect ratio of 1 after shaping.

11. The method according to claim 8 , wherein during the step of bending the wall section, remaining sections of the wall are widened out outwards in order to achieve in this manner a tightness between the shaped tube ends and the seal.

12. The method according to claim 11 , wherein the cross sectional shape of the shaped tube ends has an oversize of 0.1 mm on an outside relative to a cross sectional shape of an inside of the seal and the remaining sections of the wall are widened by 0.25 mm outward.

13. The method according to claim 8 , wherein the cross sectional shape of the shaped tube ends has on an outside an oversize of 0.25 mm relative to a cross sectional shape of an inside of the seal, so a hydraulic tightness between the shaped tube ends and the seal is achieved during the inserting the tube ends into the openings of the first collector and the second collector.

14. The method according to claim 1 , wherein the tubes and/or the ribs consist of metal or are metallized.

15. The method according to claim 1 , wherein the connection between the tubes and the ribs is a soldered connection.

16. The method according to claim 1 , wherein the tubes are flat tubes.

17. A heat exchanger, comprising:
a first collector and a second collector, each of the first collector and the second collector further comprises a series of openings receiving tubes;
a radiator matrix further comprising:
the tubes parallel to each other for flowthrough of a coolant from the first collector through the tubes to the second collector; and
a plurality of ribs arranged between the tubes, the ribs connected in a bonded manner to the tubes, wherein each of the tubes has a first tube end and a second tube end and a heat exchange section between the first tube end and the second tube end for transferring heat to an external medium; and

a seal at least into the first collector, wherein the seal further comprises holes aligned with the openings and into which the first tube end of each of the tubes is inserted, wherein the first tube end of each of the tubes and the second tube end of each of the tubes are shaped in comparison to the heat exchange section and further comprise a wall section which is bent in such a manner that the first tube end of each of the tubes and the second tube end of each of the tubes are fixed against the first collector and the second collector by the wall section with interpositioning of the seal, wherein at least one weak area is formed on at least one of the first tube end and the second tube end.

18. The heat exchanger according to claim 17 , wherein the wall section is a flap defined by torn weakening lines in a wall of the first tube end of each of the tubes and the second tube end of each of the tubes.

19. The heat exchanger according to claim 18 , wherein a hole is provided in the wall of the first tube end of each of the tubes and the second tube end of each of the tubes at each end of the weakening lines which faces away from respective ones of the first tube end of each of the tubes and the second tube end of each of the tubes.

Assignees

• Hanon Systems

Inventors

• Gregu{Hacek Over (S)}-Kollár Ján
• Lap{Hacek Over (C)}Ík Josef

Classifications

• F28F2275/045

  with particular processing steps, e.g. by allowing displacement of parts during brazing or by using a reservoir for storing brazing material · CPC title

• F28F21/081

  Heat exchange elements made from metals or metal alloys · CPC title

• F28F9/182

  the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments · CPC title

• F28F9/0246

  Arrangements for connecting header boxes with flow lines · CPC title

• F28D1/05383

  with multiple rows of conduits or with multi-channel conduits (F28D1/05391 takes precedence) · CPC title