INDIRECT CHARGE AIR COOLER

Abstract

A heat exchanger, e.g., an indirect charge air cooler for an internal combustion engine, is disclosed. The heat exchanger includes a plurality of tubes that provide a first channel system for a first fluid, and a second channel system for a second fluid disposed between the plurality of tubes that is fluidically separated from the first channel system. Two opposite side parts for fluidically bounding the second channel system are provided, between which the plurality of tubes are arranged. At least one frame part is soldered together with a respective outer edge of the two side parts. The outer edge of a side part includes a tab bent over S-shaped as edge reinforcement with a first tab section solder-plated on an outside and a second tab section solder-plated on an inside. The frame part has an S-shaped cross section with a first receptacle that receives the first tab section.

Claims

1. A heat exchanger for an internal combustion engine, comprising: a plurality of tubes that provide a first channel system for a first fluid, a second channel system for a second fluid disposed between the plurality of tubes that is fluidically separated from the first channel system, two opposite side parts for fluidically bounding the second channel system, between which the plurality of tubes are arranged, at least one frame part that is soldered together with a respective outer edge of the two side parts, the outer edge of at least one side part includes a tab bent over S-shaped as edge reinforcement with a first tab section solder-plated on an outside and a second tab section solder-plated on an inside, and the at least one frame part has an S-shaped cross section with a first receptacle and the first tab section of the outer edge of the at least one side part is received in the first receptacle.

2. The heat exchanger according to claim 1, wherein the first tab section has a width B1 and the second tab section a width B2, wherein B1≥B2.

3. The heat exchanger according to claim 1, wherein the first tab section has a width B1 that amounts to approximately 15 mm.

4. The heat exchanger according to claim 1, wherein at least one of: a thickness D of the at least one side part amounts to approximately 1.2 mm±0.1 mm, and a face-end edge is slanted by an angle of approximately 3°.

5. The heat exchanger according to claim 1, wherein the at least one frame part is connected via a solder connection to the first tab section of the at least one side part.

6. The heat exchanger according to a claim 1, wherein the at least one frame part is structured as a closed rectangular frame with two longitudinal sides and two transverse sides, wherein each of the two longitudinal sides is connected to the outer edge of a respective one of the two side parts and each of the two transverse sides is connected to an associated outer edge of a bottom part and of a box part.

7. The heat exchanger according to claim 1, wherein the at least one side part has at least one of perforations and recesses in a region of the first tab section.

8. A side part of a heat exchanger comprising: at least one outer edge including a tab bent over S-shaped as edge reinforcement with a first tab section solder-plated on an outside and a second tab section solder-plated on an inside.

9. The side part according to claim 8, the first tab section has a width B1 and the second tab section a width B2, wherein B1≥B2.

10. The side part according to claim 8, characterized in that the wherein a width B1 of the first tab section amounts to approximately 15 mm.

11. The side part according to claim 8, wherein at least one of: a thickness D of the side part amounts to approximately 1.2 mm±0.1 mm, and a face-end edge is slanted by an angle of approximately 3°.

12. The side part according to claim 8, further comprising at least one of perforations and recesses disposed in a region of the first tab section.

13. An internal combustion engine, comprising: a heat exchanger configured as charge air cooler, the heat exchanger including: a plurality of tubes that provide a first channel system for a first fluid; a second channel system for a second fluid disposed between the plurality of tubes that is fluidically separated from the first channel system; two opposite side parts for fluidically bounding the second channel system, between which the plurality of tubes are arranged; at least one frame part that is soldered together with a respective outer edge of the two side parts; the outer edge of at least one side part includes a tab bent over S-shaped as edge reinforcement with a first tab section solder-plated on an outside and a second tab section solder-plated on an inside; and the at least one frame part has an S-shaped cross section with a first receptacle, and the first tab section of the outer edge of the at least one side part is received in the first receptacle.

14. The internal combustion engine according to claim 13, wherein the first tab section has a width B1 and the second tab section a width B2, wherein B1≥B2.

15. The internal combustion engine according to claim 14, wherein the width B1 of the first tab section amounts to approximately 15 mm.

16. The internal combustion engine according to claim 13, wherein a thickness of the at least one side part amounts to approximately 1.2 mm ±0.1 mm.

17. The internal combustion engine according to claim 13, wherein a face-end edge of the outer edge is slanted by an angle of approximately 3°.

18. The internal combustion engine according to claim 13, wherein the at least one frame part is connected via a solder connection to the first tab section of the at least one side part.

19. The internal combustion engine according to claim 13, wherein the at least one frame part is structured as a closed rectangular frame with two longitudinal sides and two transverse sides, wherein each of the two longitudinal sides is connected to the outer edge of a respective one of the two side parts and each of the two transverse sides is connected to an associated outer edge of a bottom part and of a box part.

20. The internal combustion engine according to claim 13, wherein the at least one side part has at least one of perforations and recesses in a region of the first tab section.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0017] There it shows, in each case schematically,

[0018] FIG. 1 an exploded representation of a heat exchanger according to the invention,

[0019] FIG. 2 a lateral view of the heat exchanger,

[0020] FIG. 3 a sectional representation along the section plane A-A from FIG. 2,

[0021] FIG. 4 a lateral view of a side part according to the invention,

[0022] FIG. 5 a detail representation Z from FIG. 4,

[0023] FIG. 6 a front view of the side part according to the invention,

[0024] FIG. 7 a detail representation C from FIG. 7.

DETAILED DESCRIPTION

[0025] According to FIGS. 1 to 3, a heat exchanger 1 according to the invention, which can be designed for example as indirect charge air cooler of an internal combustion engine 2, comprises a first channel system with tubes 3 for a first fluid flowing in a first flow direction 4, wherein between the tubes 3 a second channel system that is fluidically separated from the first channel system for a second fluid is formed, which can be flowed through in a second flow direction 5. The second channel system is fluidically bounded by way of two opposing side parts 6 (see also FIGS. 4 to 7). In addition to this, the heat exchanger 1 comprises at least one frame part 7 which is soldered and in particular pressed together with a respective outer edge 8 of the side parts 6 on the longitudinal side. Looking at the outer edges 8 of the side parts 12 in more detail, it is noticeable that the same comprises an S-shaped bent-over tab 9 with a first tab section 10 solder-plated on the outside and a second tab section 11 solder-plated on the inside. Here, the solder plating is marked with the reference number 12. The frame part 7 in turn has an S-shaped cross section with a first receptacle 13, in which the outer edge 8 of at least one side part 6 with its first tab section 10 is received, as is clearly noticeable according to FIG. 3.

[0026] Here, the side parts 6 can be formed as aluminium plates solder-plated on one side and subsequently suitably transformed. Here, the first tab section 10 has a width B1, whereas the second tab section 11 has a width B2. The two widths B1 and B2 can have the following ratio: B2≥(B1)/2. The width B1 can for example amount to 15 mm. A thickness D of the side part 6 amounts to approximately 1.2 mm±0.1 mm, so that the side part 6 in the region of the first tab section 10 is approximately 2.4 mm±0.1 mm thick, while in the second tab section 11 it is approximately 3.6 mm thick.

[0027] As is noticeable in particular in FIGS. 1, 3 and 6, a pressure force F can be exerted via the respective second tab section 11 on the side part 6 from the outside and because of this a pre-fixing of the heat exchanger 1 during the soldering achieved, without it having to be feared that a soldering frame used for the pressing-on is soldered to the side part 6 and because of this has to be subsequently removed again from the same in an elaborate, manual and expensive manner. Specifically in the second tab section 11 the solder plating 12 is located inside while first tab section 10 it is located outside and because of this brings about the soldering in the receptacle 13 of the frame part 7.

[0028] In addition to this, the frame part 7 can be connected via a solder connection to the first tab section 10 of the respective side part 6. Looking at FIG. 1 further it is noticeable that the frame part 7 is designed as a closed rectangular frame with two longitudinal sides 14 and two transverse sides 15, wherein each longitudinal side 14 is connected to an associated outer edge 8 of an associated side part 6 and each transverse side 15 to an associated outer edge 16 of a bottom part 18 and an outer edge 17 of a box part 19. The bottom 18 and the box part 19 each form a collector for a fluid flowing in the tubes 3.

[0029] Looking at FIGS. 1 and 4 further it is noticeable that the side part 6 has perforations 20 in the region of the first tab section 10, wherein these perforations can be formed as openings and/or as recesses, in particular impressions and contribute to better distributing the solder during the soldering. By way of this, an even, reliable and tight soldering can be achieved in particular.

[0030] Besides the entire heat exchanger 1, the side part 6 for such a heat exchanger 1 is obviously also subject of the invention such a side part 6 is cost-effectively producible as shaped sheet metal part, in particular of aluminium and additionally has the major advantage that in the region of its second tab section 11 it provides a working surface 21 for applying a pressure force F, wherein the working surface 21 does not have any solder plating 12 and because of this no soldering whatsoever for example to a soldering frame has to be feared. Through the second tab section 11 provided for the first time according to the invention, the stiffness of the side part 6 can be additionally increased in the region of the outer edge 8, as a result of which in particular the risk of an uncontrolled tearing can also be minimised.

[0031] Looking at FIG. 5 it is noticeable therein that a face-end edge 22 of the outer edge 8 is slanted by an angle a of approximately 3° which facilitates the assembly and thus the manufacture of the heat exchanger according to the invention.

[0032] Generally, the manufacture and production of the heat exchanger 1 can be simplified with the side part 6 according to the invention and with the heat exchanger according to the invention constructed from these, since through the second tab section 11 provided for the first time according to the invention, a working surface 21 that is not solder-plated is available for the first time, via which a pressure force F for fixing during the soldering can be applied.