Heat exchanger for a motor vehicle and corresponding production method

Patent metadata

Field	Value
Publication number	US-11187472-B2
Application number	US-201916711414-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	Dec 12, 2018
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

A heat exchanger for a method vehicle and a method of producing a heat exchanger are disclosed. The heat exchanger includes a heat exchanger block closed by a side part. The heat exchanger block has a tube bottom including a deformable hook, and the side part includes a tab provided complementary to a corner region of the tube bottom. The tab has a section, that abuts on a front side of the tube bottom, that includes a through opening or depression. A material portion of the hook is displaced through the through opening or depression via a graining in an assembled state, such that the axes of the through opening and the graining are offset and parallel to one another.

First claim

The invention claimed is:

1. A heat exchanger for a motor vehicle, comprising:
a heat exchanger block including a plurality of flat tubes and heat exchanger structures arranged therebetween,
wherein the plurality of flat tubs are tightly received in a tube bottom on a longitudinal end side,
wherein the heat exchanger block is closed on both sides via a respective side part,
wherein the respective side part is connected mechanically and via a substance-to-substance bond to the tube bottom via a soldered connection,
the tube bottom has a front side and a bottom side that merge into one another via a rounded corner region,
the tube bottom has a deformable hook on a front side thereof,
the respective side part has a tab on the longitudinal end side provided complementary to the rounded corner region of the tube bottom, wherein the tab abuts via a contact surface on the front side, the corner region, and the bottom side of the tube bottom in an assembled state,
the tab has a section, which abuts on the front side of the tube bottom, comprising a through opening or depression,
the hook engages around the section of the tab and is pressed thereto in the assembled state,
wherein a material portion of the hook is displaced into the through opening or depression via a graining in the assembled state, and
wherein an axis of the through opening or depression and an axis of the graining are arranged offset and parallel to one another such that the tab is pulled towards the bottom side of the tube bottom in response to a production of the graining.

2. The heat exchanger according to claim 1 , further comprising a first tooth contour is provided on the section of the tab.

3. The heat exchanger according to claim 1 , further comprising a second tooth contour provided on the hook.

4. The heat exchanger according to claim 3 , further comprising a first tooth contour provided on the section of the tab, wherein the first tooth contour is pressed in a positive manner with the second tooth contour in the assembled state.

5. The heat exchanger according to claim 4 , wherein the first tooth contour and the second tooth contour have rows of teeth structured and arranged orthogonal to one another.

6. The heat exchanger according to claim 1 , further comprising two guide contours, between which the hook is arranged in the assembled state, provided on the section of the tab.

7. The heat exchanger according to claim 1 , wherein the through opening or depression is a bore.

8. The heat exchanger according to claim 1 , wherein the respective side part has at least one reinforcing bead, structured and arranged to stiffen the tab.

9. A method for producing a heat exchanger for a motor vehicle, comprising:
providing a heat exchanger block comprising a plurality of parallel flat tubes and heat exchanger structures arranged therebetween, wherein the plurality of flat tubes are each inserted into a tube bottom on a longitudinal end side, wherein the tube bottom has a front side and a bottom side that merge into one another via a rounded corner region,
closing the heat exchanger block on both sides via a respective side part,
the front side of the tube bottom having a deformable hook,
providing a tab on a longitudinal end side of the respective side part complementary to the rounded corner region of the tube bottom, and abutting the tab via a contact surface on the front side, the corner region, and the bottom side of the tube bottom in an assembled state,
the tab having a section abutting on the front side of the tube bottom that includes a through opening or depression,
in response to the assembled state, the hook is pressed with the section of the tab and engages around said section,
displacing a material portion of the hook into the through opening or depression via a graining, wherein an axis of the through opening or depression and an axis of the graining are arranged offset and parallel to one another, such that the tab is pulled towards the bottom side of the tube bottom in response to a production of the graining, and
soldering the respective side part to the front side, the corner region, and the bottom side of the tube bottom via its tab via the contact surface.

10. The method according to claim 9 , further comprising arranging the hook between two guide contours provided on the section of the tab in the assembled state.

11. The method according to claim 9 , further comprising pressing a first tooth contour provided on the section of the tab in a positive manner with a second tooth contour provided on the hook in the assembled state.

12. The heat exchanger according to claim 2 , wherein the section of the tab includes two guide contours, and wherein the hook is arranged between the two guide contours in the assembled state.

13. The heat exchanger according to claim 2 , wherein the through opening or depression is a bore.

14. The heat exchanger according to claim 2 , wherein the respective side part includes at least one reinforcing bead, structured and arranged to stiffen the tab.

15. The heat exchanger according to claim 2 , further comprising a second tooth contour provided on the hook, wherein the first tooth contour and the second tooth contour each have rows of teeth arranged orthogonal to one another.

16. The heat exchanger according to claim 5 , wherein the section of the tab includes two guide contours, and wherein the hook is arranged between the two guide contours in the assembled state.

17. The heat exchanger according to claim 6 , further comprising a tooth contour provided on at least one of the tab and the hook.

18. The heat exchanger according to claim 17 , wherein the tooth contour includes rows of teeth.

19. The heat exchanger according to claim 17 , wherein the respective side part includes at least one reinforcing bead, structured and arranged to stiffen the tab.

20. The heat exchanger according to claim 19 , wherein the through opening or depression is a bore.

Assignees

• Mahle Int Gmbh

Inventors

• Heine Reinhard
• Rachwalski Pawel

Classifications

• F28F2275/122

  by crimping, caulking or clinching · CPC title

• B60H1/00321

  Heat exchangers for air-conditioning devices (B60H1/3227 takes precedence) · CPC title

• F28F9/0219

  Arrangements for sealing end plates into casing or header box; Header box sub-elements (F28F9/0236 takes precedence) · CPC title

• F28F2275/04

  by brazing · CPC title

• F28D1/05316

  Assemblies of conduits connected to common headers, e.g. core type radiators (F28D1/05366 takes precedence) · CPC title