EP2137478A2

EP2137478A2 - Heat exchanger

Info

Publication number: EP2137478A2
Application number: EP08748897A
Authority: EP
Inventors: Viorel Braic; Roland Hemminger; Daniel Hendrix; Mark Schienemann; Erwin Skiba; Danijel Budimir; Jochen KÄSER
Original assignee: Behr GmbH and Co KG
Current assignee: Mahle Behr GmbH and Co KG
Priority date: 2007-04-11
Filing date: 2008-04-11
Publication date: 2009-12-30
Also published as: EP3012570B1; WO2008125309A3; CN101688763B; DE102008018594A1; US20100089548A1; US9097466B2; WO2008125309A2; EP3012570A1; CN101688763A

Abstract

The invention relates to a heat exchanger (10, 20, 30, 40, 50), particularly a charge air heat exchanger or exhaust gas heat exchanger, for the heat exchange between a first fluid, particularly a charge air (3), or an exhaust gas, and a second fluid, particularly a coolant, comprising the following: heat exchanging guides for the first and second fluids, the guides being separated from each other in the block (1), the block (1) having a plurality of flow channels (5) through which the first fluid flows, and a housing (7, 37, 47, 57) that receives the flow channels (5) and through which the second fluid flows; at least one compartment lid (11, 11'), which is flow-connected to the flow channels (5), and a base (15, 15') that is attached to the compartment lid (11, 11') and that is equipped with one or more passage openings (17) for flow channels (5). In order to achieve an advantageous connection of the compartment lid (11, 11') to the base (15, 15'), particularly in case the compartment lid (11, 11') and the base (15, 15') are made of different materials, the invention provides that the compartment lid (11, 11') is attached to the base (15, 15') via one or more connections as a bolted connection (19) and/or a slotted crimping (26).

Description

BEHR GmbH & Co. KG Mauserstrasse 3, 70469 Stuttgart

Heat Exchanger

The invention relates to a heat exchanger for heat exchange between a first fluid and a second fluid comprising: a block for the separate and heat exchanging guidance of the first and second fluid, which block a number of the first fluid flow through the flow channels and the flow channels receiving, of the second Fluid flowed through housing has; at least one box lid, which is fluidly connected to the flow channels; a bottom which is fixed to the lid and is provided with one or more passage openings for flow channels. The invention further relates to a use of the heat exchanger.

In a known heat exchanger, a box lid can be made of deep-drawn sheet metal, which is soldered to the block in the manufacturing process. While this has advantages in the high temperature range, attachments such as e.g. Holders or flanges for sensors are manufactured as additional parts from sheet metal and are connected to the box lid before soldering, which makes the manufacturing process more complicated. In addition, a more elaborate box shape usually can not

BESTÄTOiLJINGSKOPIE be produced as a deep-drawn part, so that in this case, a cast must be made and the box lid must be welded to the block usually. This type of box turns out to be comparatively expensive and expensive to produce, especially with more complex designs.

A cost-effective alternative to such heat exchangers is a heat exchanger of the type mentioned, in which the box has a box lid made of plastic. In this case comparatively complex construction forms can be realized, although with corresponding plastic materials and a corresponding design of the box, even higher temperature ranges can certainly be realized. Examples of plastic box lids are given in DE 10 2004 051 207 A1 and DE 10 2004 047 901 A1.

Basically, there are different ways to attach a plastic box lid on the heat exchanger, such as connections as shown in WO 2004/09457, Fig. 2 or DE 199 53 785 A1, Fig. 4 are shown.

DE 10 2005 012 761 A1 discloses a heat exchanger mentioned in the introduction with a housing made up of two side parts and two housing covers, wherein the side parts are soldered to the block and the housing covers are welded to the side parts. Furthermore, plastic collection boxes are mechanically connected with the interposition of a gasket with tube sheets. The mechanical connection is done by bending tabs of the tubesheets to the edge of the header. This type of heat exchanger is still in need of improvement.

It is desirable to advantageously improve the connection of a box ceiling, in particular a box lid made of a non-metal material, to a metal part, to the heat exchanger, preferably under consideration. tion of an improved sealing effect. It is also desirable to improve the housing.

At this point, the invention begins, the object of which is to provide a heat exchanger in which the box lid of a box is particularly advantageously tied to the ground, in which in particular the box lid made of a non-metal material is connected to the metal base, preferably with the improvement of a sealing effect , In particular, it is a further object of the invention to provide a heat exchanger with an improved housing.

The object is achieved by a heat exchanger of the type mentioned, in which according to the invention it is provided that the box lid is fixed, preferably connected, at the bottom via one or more connections as a screw connection and / or slot flanging. This concept according to the invention has proved to be particularly advantageous in the event that the box lid and the base are made of different materials.

A heat exchanger of the type mentioned in the introduction can be formed in particular as a charge air heat exchanger in which the first fluid is a charge air, or as an exhaust gas heat exchanger in which the first fluid is an exhaust gas. The first fluid may also be an exhaust gas charge air mixture or the like fluid for charging a combustion engine. The second fluid, in particular a coolant, is for example a water-based or other suitable coolant.

The invention is based on the consideration that a connection of a box lid, in particular of non-metal, for example a plastic, fiber composite material or a ceramic, should be comparatively safe and, on the other hand, sufficiently flexible with respect to relative thermal motion. - A -

soil, which is preferably made of metal, e.g. Aluminum is made, and a box lid is. The invention has recognized that, for this purpose, a screw connection or a slot flanging or a combination of a screw connection with a slot flanging is superior to known types of connection. A connection type according to the concept of the invention thus enables a particularly cost-effective connection of a box lid, z. As metal in particular but non-metal, to an otherwise metallic construction of a heat exchanger, so that in particular more complex box shapes are possible while avoiding elaborate manufacturing process.

As a particularly preferred development of the invention, a heat exchanger in the form of a charge air heat exchanger, in particular a charge air cooler has been found, which has the features according to the concept of the invention düng. The above-mentioned problems have resulted, in particular, in air boxes, wherein due to space bottlenecks in the vehicle front, the indirect charge air cooling increasingly prevails in this area. In this context, a development leads in a particularly preferred manner to the use of the heat exchanger according to the concept of the invention as a charge air cooler for the indirect cooling of charge air in a charge air system for an internal combustion engine of a motor vehicle.

In addition, the inventive concept can also be realized in the case of a heat exchanger as disclosed in the not yet filed German patent application of the Applicant with the file reference 04-B-

102 C is described. There is a heat exchanger of the aforementioned

Specified type in which the bottom has at least one first groove into which extends the box cover or a wall portion of the box lid of the box. Under a box is present in particular the

Box lid, a seal and possibly the ground to understand. The documents of said application are hereby incorporated by reference into the disclosure of this application. It has been found that the connection concept of a screw connection and / or a slot flanging between the box lid and the floor can be realized in a particularly advantageous manner with the heat exchanger described in the aforementioned application.

Further advantages of the concept of the invention will become apparent within the scope of advantageous developments of the invention, which are to be taken from the subclaims.

Advantageously, the floor is made of a metal, in particular of aluminum. In this case, a sufficient thermal stability and an advantageous attachment of the flow channels in the through holes of the soil is possible.

In order to ensure a further improved tight connection of the box lid, a particularly preferred development provides that a seal is defined between the base and the box lid.

In a particularly advantageous manner it is provided that the bottom and / or the box lid has a bead, which is advantageously designed for receiving the seal. In particular, the bead is arranged in a bottom edge region and / or a box top edge region.

In the context of the aforementioned developments, it has proven to be particularly effective in a sealing of the box that a front side of the box cover or a wall portion of the box lid and / or the bottom extends along the bead. The above-mentioned developments are suitable, preferably for improving a sealing behavior, in a special way to the ground and the box cover relative to each other - in a bead - set. Optionally, one or more beads may be arranged on the box lid. Advantageously, then extends an end face of the soil along the bead. Preferably, one or more beads are arranged on the bottom and advantageously extends an end face of the box cover along the bead. In other words, in a particularly advantageous differentiation from the prior art, one or more beads are used in order to achieve an improved and denser fixing of the base and box lid relative to one another.

According to a first particularly preferred variant of the invention, it is provided that the box lid or a wall portion of the box lid and / or the bottom abuts with a front side blunt on the ground, in particular such that the end face engages over the bead. In other words, the width of the front side is greater than the width of the bead.

The abovementioned first variant of the invention has proved to be particularly effective, in particular with regard to a screw connection, in particular with regard to its sealing behavior, but is not limited thereto.

In principle, a realization of the screw can be done in a variety of ways. A development of the invention provides to design the screw particularly secure. In the context of the concept of the invention, in particular, a development has proven to be advantageous in which the bottom has a number of eyes for receiving a respective screw. An eye may in particular be arranged on a corner and / or on one side of the floor. The attachment of eight eyes - one on each corner and side of the floor - proved to be particularly effective. In general, two adjacent eyes have a distance which is in the range between 40 to 90 mm, preferably between 50 to 70 mm. Basically, the number of eyes depends on the dimensions of the floor. The mentioned spacing regions have proved to be particularly advantageous for preferred floor dimensions and form a suitable compromise between stability and material expenditure.

The manufacturing process can be simplified if a set nut is provided on the bottom or on the box to form the screw connection.

According to a particularly preferred second variant of the invention it is provided that an end face of the lid or a wall section of the lid and / or the bottom engages in a bead. The second variant of the invention has proved to be particularly effective in the context of a slot flanging, preferably for a corrugated slot, but is not limited thereto. This makes it possible to achieve a particularly advantageous sealing effect and the slot flanging can be used in a particularly space-saving manner. The Schlitzbördelung is advantageously designed as Wellschlitzbördelung, as this has proven to be reliable and is within the scope of existing manufacturing concepts.

In a particularly preferred embodiment of the invention, the possibility of saving material has resulted from the fact that advantageously a bottom thickness is reduced radially outward over a bead away. Preferably, the bottom thickness is lower at least at the bead bottom than at a location of the bottom which is further inward along the radius. Accordingly, the wear forces for the Schlitzbördelung or Wellschlitzbördelung due to the reduced material thickness are lower than in other designs. A particularly advantageous compromise between material expenditure and stability arises when the ratio of a largest floor dia- to a minimum floor thickness in the range between 1, 5: 1 and 4: 1, in particular between 2: 1 and 4: 1.

Preferably, the bottom of the housing is fixed, for example, by a cohesive or mechanical or other for the determination of the

Soil suitable connection of the floor with the housing. In particular, the floor takes the flow channels in one or more

Through openings on. This is a sufficient support of

Ensures flow channels on the ground and arranged the block in a particularly advantageous manner in the housing.

Preferably, the housing has side walls extending along a flow direction and is formed in several parts. This allows a particularly simple assembly of the block in the housing and the heat exchanger as a whole. It has been found that it is particularly advantageous according to the development that at least one housing part forms a housing edge, i. integrally formed. As a result, leaks can be avoided by connecting housing parts to a housing edge and the assembly of the housing is considerably facilitated. Preferably, at least one housing part at least partially forms a first and a second, mutually aligned side wall in one piece. This has the advantage that, in contrast to the prior art, housing side walls no longer have to be provided separately, but are provided in one piece in a single housing part. In particular, this reduces the number of housing parts.

Preferably, according to a first modification, at least one housing part is U-shaped, for example for providing a cover wall and at least part of a first side wall and at least part of a second side wall of the housing. Preferably, the housing formed of two U-shaped housing parts. Particularly preferably, the two housing parts are formed in opposite directions, so that with them an entire housing shell can be formed in a simple manner. In particular, it may be advantageous to form the two U-shaped housing parts symmetrically or practically identically, which considerably simplifies the production process. Preferably, to form a housing shell, and in particular in the case of U-shaped housing parts, a separating edge of housing parts in the region of a side wall is arranged.

In a second modification, it has proved to be advantageous that at least one housing part is L-shaped, for example as a cover wall and side wall of the housing formed with the one-piece housing part. Overall, the housing may be formed of two L-shaped housing parts. In particular, the two L-shaped housing parts are formed in opposite directions or substantially symmetrical or identical, which significantly reduces the manufacturing cost. Preferably, in the context of the second modification, it has proved to be advantageous to arrange a separating edge of housing parts in the region of a housing edge.

In a preferred embodiment of the invention, the block has a first arrangement and a second arrangement of flow channels, wherein the first arrangement and the second arrangement are arranged on opposite sides of an intermediate floor. As a result, the integrity and stability of the heat exchanger is considerably improved, and yet a comparatively large flow cross-section for the first fluid, for example an exhaust gas or a charge air, can be made available.

An intermediate floor may be arranged parallel to and / or substantially in a plane spanned by the separating edges of housing parts. This has proven to be particularly advantageous in case of U-shaped housing parts, in which a separating edge in the region of a side wall is arranged. This advantageously makes it possible to arrange an intermediate floor virtually centrally and parallel to the side walls and in the plane spanned by the separating edges of the U-shaped housing parts.

Basically, it is advantageous in the context of the aforementioned development that opposite separating edges of the housing parts form a gap, in particular with a gap width of 1 mm to 2 mm. In particular, when soldering the components together, in particular for the formation of the soldering mandrel, the choice of the gap width is important, since sufficient soldering is ensured neither in the case of a gap which is too large nor too small.

According to a preferred first modification of this development, an intermediate floor can engage in a gap formed by opposing separating edges of the housing parts. This stabilizes the multi-part housing in conjunction with the block. In addition, in a particularly preferred manner, the intermediate bottom lying in the gap can be used to seal the housing parts against each other. In a preferred second modification of this development, a web cover separating edges of the housing parts, in particular be arranged on the outside of the housing. The additionally or alternatively provided for the first modification measure can also be used to stabilize the multi-part housing. Preferably, a web may have a bead, in particular a bead, which is additionally designed for stiffening. In a refinement of this second modification, a bead of the web is particularly preferably designed such that it engages in a gap formed by opposing separating edges of the housing parts.

In an advantageous development of the invention, at least two components of the heat exchanger are soldered to one another In an advantageous development of the invention, all components are soldered together except for the at least one box cover, in particular the two box covers, of the heat exchanger.

Overall, according to the aforementioned refinements relating to the housing, a housing which is particularly stable and can be replaced with comparatively few parts is made available. The above-described measures for the execution or arrangement of the separating edges of the housing parts also lead to a particularly preferred further stabilization or reinforcement of the multi-part housing.

While the invention has proven to be particularly useful in the context of use of the heat exchanger in the form of a charge air heat exchanger, in particular charge air cooler, for example, for indirect or direct cooling of charge air in a charge air supply system for an internal combustion engine of a motor vehicle, and in this sense and during this While the invention is described in detail below by way of examples in this area, it should be understood that the concept described herein, as claimed, is also useful in the context of other applications that are outside the explicitly listed examples and pertaining to other applications that are not explicitly mentioned. For example, the proposed concept of the invention could also apply to the use of a heat exchanger as an exhaust gas heat exchanger, in particular exhaust gas cooler, eg for exhaust gas cooling in an exhaust gas recirculation system of an internal combustion engine of a motor vehicle or as a heater for the interior heating of a motor vehicle. Furthermore, use as an oil cooler, in particular for cooling engine oil and / or gear oil or use as a refrigerant cooler or refrigerant condenser in a refrigerant circuit of an air conditioning system of a motor vehicle is also possible. In this connection, the invention also leads to an exhaust gas recirculation system for an internal combustion engine, comprising an exhaust gas recirculation, a compressor and a heat exchanger in the form of an exhaust gas heat exchanger, in particular radiator, according to the concept of the invention. Furthermore, the invention also leads to a charge air supply system for an internal combustion engine, comprising a charge air intake, an air filter, a compressor and a heat exchanger according to the concept of the invention in the form of a charge air heat exchanger, in particular radiator.

Embodiments of the invention will now be described below with reference to the drawing. This is not intended to represent the embodiments to scale, but the drawing, where appropriate for explanation, executed in a schematized and / or slightly distorted form. With regard to additions to the teachings directly recognizable from the drawing reference is made to the relevant prior art.

It should be noted that various modifications and changes in form and details of an embodiment can be made without departing from the general idea of the invention. The features of the invention disclosed in the foregoing description, in the drawing and in the claims may be essential both individually and in combination for the development of the invention. The general idea of the invention is not limited to the exact form or detail of the embodiments shown below or limited to an article which would be limited in comparison with the subject matter claimed in the claims. For the given design ranges, values within the stated limits should also be disclosed as limit values and be arbitrarily usable and claimable. The drawing shows in detail different embodiments according to the concept of the invention, wherein an implementation of the block of the heat exchanger has proved in detail to be advantageous, as shown in the The above-mentioned German patent application of the applicant is described. In detail, the drawing shows in:

1 shows a particularly preferred embodiment of a heat exchanger according to the first variant of the invention;

Fig. 2 is an enlarged partial perspective sectional view of the bottom portion of the embodiment of Fig. 1;

Fig. 3: an exploded view of Fig. 2;

4 is a sectional view of the detail of a screw in the embodiment of FIG. 1 to FIG. 3,

Fig. 5: a particularly preferred embodiment according to the second variant of the invention;

Fig. 6 is an enlarged partial perspective sectional view of the embodiment of Fig. 5;

Fig. 7: an exploded view of Fig. 6;

8 is a perspective partial sectional view of the detail of a

Corrugated slot flanging in Fig. 6;

Fig. 9,

10 is a sectional view of the detail of the Wellschlitzbördelung the

Embodiment in Fig. 5 to Fig. 8;

11 is a perspective view of another preferred embodiment of a heat exchanger according to the first or second variant of the invention, wherein the housing is formed in a first modification of two U-shaped housing parts and reinforced with a stiffener shown in exploded view with a stiffener ungssicke;

Fig. 12 is a perspective view of the heat exchanger of Fig. 11;

Fig. 13 is a perspective view of yet another preferred embodiment of the heat exchanger similar to the gem. 11 and FIG. 12, wherein, in contrast, an intermediate bottom engages in a gap formed by opposing separating edges of U-shaped housing parts;

FIG. 14 is an exploded view of the heat exchanger shown in FIG. 13; FIG.

Fig. 15 is a perspective view of yet another embodiment of a heat exchanger according to the first or second variant of the invention, in which the housing is formed in a second modification with L-shaped housing parts and an angled separation edge;

16 shows an exploded view of the housing of the heat exchanger shown in FIG. 15;

17a shows a first perspective illustration of a further embodiment of the heat exchanger;

Fig. 17b is a second perspective view of the heat exchanger; Fig. 18 is a perspective view of the heat exchanger block of the further embodiment

Fig. 19 is a sectional view of a tube bottom cutout.

1 shows a heat exchanger 10 in the form of a charge air cooler for indirect charge air cooling, which can be used in a charge air system for an internal combustion engine. A not further illustrated charge air system also has a charge air intake, an air filter and a compressor. The heat exchanger 10 represents a particularly preferred embodiment of the first variant of the invention, according to which a box lid 11 is fixed to a bottom 15 via a plurality of screw 19.

As can be seen from a combination of FIG. 1 and FIG. 2, the heat exchanger 10 has a block 1, which is provided for the separate and heat exchanging guidance of a first fluid in the form of a charge air 3 and a coolant, not shown. For this purpose, the block 1 has a number of flow channels 5 through which the charge air 3 can flow and a housing 7 accommodating the flow channels 5 and through which the coolant can flow. In the present case, the charge air cooler 10 has two boxes 9, 9 ', of which the front box 9 in FIG Fig. 2 to Fig. 4 is shown in more detail. Both boxes 9, 9 'are fluidly connected to the flow channels 5 and have a suitably designed according to the connections for the charge air 3 differently designed box lid 11, 11'. In this embodiment, both box covers 11, 11 'formed of plastic, wherein the front cover 11 is shown in more detail with a single integrally molded diffuser assembly 13 for the charge air connection. On the lid 11, a bottom 15 is fixed, which in Fig. 3 clearly illustrated passage openings 17 and these through holes 17 associated flow channels 5 has.

In a modified embodiment, the heat exchanger may also be designed as an exhaust gas heat exchanger, which is correspondingly, instead of charge air 3, flowed through by exhaust gas.

In the embodiment according to the first variant of the invention shown in FIGS. 1 to 4, the box lid 11, 11 'is fastened to the bottom 15 with a plurality of screw connections 19 shown in greater detail in FIG. 4. In this case, the bottom 15 a presently completely along the bottom 15 circumferential bead 21, in which a seal 23, in the present case in the form of a ring seal, is added.

As can be seen in FIG. 4 in conjunction with FIGS. 1 to 3, the end face 25 of the box lid 11, 11 'extends along the bead 21 and abuts the bottom 15 in a blunt manner, with the end face 25 overlapping the bead 21. As a result, the seal 23 is pressed by the end face 25 in the bead 21, so that a very effective seal between the bottom 15 and the box lid 11 is achieved. In the present case, the screw connections 19 are each formed by a screw 19A and a setting nut 19B held in a screw eye 19C. As clearly shown in FIGS. 1 to 3, in each case a screw-on eye 19C is arranged at respectively one corner and one side center of the bottom 15. The screw connection is further secured by an annular flange 19D between the set nut 19B and screw 19A. The screw connection 19 exerts a pressing pressure between the box lid 11 and the bottom 15 on the seal 23, which expands due to the pressing pressure in the bead 21 and effectively seals contact surfaces between the box lid 11 and the bottom 15. The screw eyes 19C are equally spaced from each other - in the present case, the distance should be about 50 to 80 mm. For screwing on either the block 1 facing bottom side or the box 9, 9 'setting nuts 19B are arranged. In the present case, the screw 19 A is inserted through a box base in the form of a metal bushing on the bottom 1 and bolted to the nut 19 B behind the bottom 1.

In the screw 119, the groove width in the bottom 1 is about 3 mm. The 2 mm wide seal 23 is pressed into the bead 21. The bead 21, 21 'is in some places locally, in the present case every 30 mm, thickened to the Sickenmaß so that the seal 23 is positioned.

Fig. 5 shows another intercooler 20, also for an above with respect to the intercooler 10 in more detail described indirect intercooling, in the present case according to a preferred embodiment of the second variant of the invention, the box lid 11 at the bottom 15 via a Schlitzbördelung 26 as Wellschlitzbördelung is fixed. Like reference numerals have been used for corresponding parts of the intercoolers 10 and 20.

In contrast to the embodiment described with reference to FIGS. 1 to 4, in the embodiment of a charge air cooler 20 shown here, the box lid 11 "is fixed to the bottom 15 'via a corrugated slot flange 26. For this purpose, in the corrugated slot flange 26 shown in FIG - formed bead 21 'a seal 23' inserted, which is pressed sealingly into the bead 21 'after placing the box lid 11' by the bead 21 'engaging end face 25' of the box lid 11 'in a particularly advantageous sealing of the box The wall section 28 of the box lid 11 'forming the end face 25' of the box lid 11 'at one end merges into the air connection formed above as the diffuser 13 and at the other end the wall section 28 along a height H of the bead 21 'semi-cylindrical shaped ribs 27, which are set at a distance 29. The ribs 27 opposite each one slot 31 of the wall portion 28 opposite edge 33 is arranged. The distance 29 opposite the lying between the slots 31 material 35 of the edge 33, in this case aluminum, arranged. This material 35 can be pressed into the distance 29 between the ribs 27 when closing the Schlitzbörde- ment 26 to form the Wellschlitzbördelung. At least some of the components of the heat exchanger 10 are soldered together, in particular soldered Nocolok. In another embodiment, all components of the heat exchanger 10 to the at least one box cover, in particular the box lid, soldered together, for example, soldered Nocolok.

In the illustration shown in FIG. 10, it is also shown - equally applicable to a heat exchanger 10 and a heat exchanger 20 - that a bottom thickness decreases radially outwards beyond the bead 21 '- in the present case the greatest value D in the region of the openings 17 for the flow channels 5, in the present case tubes, over a value D 'in the region of the bead 21', up to a smallest value d in the region of the outer edge 33 of the bead 21 ', the material 35 is crimped to form the Wellschlitzbördelung 26. In the present case, the thickness of the bottom 15 'changes from D = 4 mm to d = 1, 5 mm, in particular from D = 3 mm to d = 2 mm, ie overall it is possible in embodiments of this type, the soil material by 30 to 70% , in particular by 50 to 70% to reduce. It has also been shown that it is also possible to form the thickness in the low point T of the bead 21 'already in the region of the smallest value d. Otherwise, regardless of the embodiment described here, it is possible to arbitrarily execute the transition from the thick thickness D to the thin thickness d. The described configuration of the bead 21 'has the advantage that the bottom 15' in a good Kassettierprozess in the area of the openings 17 with the thick thickness D allows a good pipe or Strömungskanalverlötung. By contrast, due to the smallest value d of the low material thickness in the region of the corrugated slot flange 26, a concept that saves space and closes forces is achieved. For example, the material to be flanged 35 can be pushed away as part of a stamping process. As a result of the material reduction in the region of the flank 33, the attachment of the box 9, 9 'can be carried out with significantly less space requirement. At least some of the components of the heat exchanger 10 are soldered together, in particular soldered Nocolok. In another embodiment, all components of the heat exchanger 10 to the at least one box cover, in particular the box lid, soldered together, for example, soldered Nocolok.

The embodiments of a heat exchanger in the form of a charge air cooler 30, 40, 50 explained with reference to FIG. 11 of FIG. 16 show advantageous examples of an embodiment of a housing 7, as is generally shown in the previously described FIGS. 1 to 10. The modifications of a housing 37, 47, 57 shown in FIGS. 11 to 16 can be used as required for a housing 7 of FIGS. 1 to 10. The embodiments of a heat exchanger 30, 40, 50 described in FIGS. 11 to 16 are illustrated, by way of example only, as embodiments according to the second variant of the invention, in which a box lid of the heat exchanger 30, 40, 50 is fixed to the bottom as a support flange , The statements made with reference to FIGS. 11 to 16 can equally be applied to a non-illustrated embodiment of a heat exchanger in which the box lid is fastened to the floor by a screw connection. Overall, the features disclosed on the ground in FIGS. 1 to 10, in particular with regard to the fixing of the box lid, can be carried out in any manner both individually and in combination with those shown in FIG. 11 16 to 16, in particular with regard to the formation of a housing 37, 47, 57, combine individually or in combination and use depending on the intended use. In this respect, the same reference numerals have been used for the same parts or parts of the same function in the embodiments. At least some of the components of the heat exchanger are soldered together, in particular soldered Nocolok. In another embodiment, all components of the heat exchanger to the at least one box cover, in particular the box lid, soldered together, for example, soldered Nocolok.

Fig. 11 shows a heat exchanger 30 in the form of a charge air cooler as an embodiment according to the second variant of the invention similar to the heat exchanger 20 described in Fig. 5. This in turn has a block 1 with a number of charge air 3 flow-through flow channels 5, which in one of Coolant flow-through housing 37 are accommodated. As explained with reference to FIGS. 5 to 10, boxes 9, 9 'are flow-connected to the flow channels 5 and have a box cover 11, 11' configured differently in accordance with the connections for the charge air 3 in detail. These are respectively fixed to the bottom 15, 15 'in accordance with the manner explained with reference to FIGS. 5 to 10. The bottom 15, 15 'is fixed to the housing, wherein the flow channels 5 pass through the through holes 17 shown in detail in Fig. 7.

The housing 37 shown in perspective in FIG. 12 and in an exploded view in FIG. 11 has two cover walls 36 and two side walls 38, wherein a cover wall 36 is aligned substantially at right angles to the side wall 38. A presently U-shaped upper housing part 37.1 forms a first and second upper housing edge 39.1, 39.2, while a second lower housing part 37.2 forms a first lower housing edge 39.3 and a second lower housing edge 39.4, not shown. The upper Housing part 37.1 is opposite to the lower housing part 37.2 - except for coolant connections 41, 42, 43 - performed substantially the same. Via the coolant connections 41, 42, 43, coolant 4 is supplied to and removed from the interior of the housing 37 in order to flush around the flow channels 5 in a manner not shown. In the present case, the entire housing jacket of the housing 37 is formed by means of the upper housing part 37.1 and the lower housing part 37.2. The separating edges 44.1 and 44.2 of the upper housing part 37.1 and of the lower housing part 37.2 are in the present case arranged in the region of a side wall 38 of the housing 37 and face each other to form a gap 45. For sealing the housing 37, the gap 45 is covered with a web 46, wherein a stiffening bead 46. 1 of the web engages in the gap 45. In addition to a tight closure of the housing 37, the attachment of the web 46 causes the already relatively high stability of the housing 37, which is already comparatively high, due to the one-piece design of the upper housing part 37.1 and the lower housing part 37.1. At least some of the components of the heat exchanger are soldered together, in particular soldered Nocolok. In another embodiment, all components of the heat exchanger are soldered to one another, for example Nocolok, with the exception of the at least one box lid, in particular the box lids.

13 shows a perspective illustration and FIG. 14 shows an exploded view of another embodiment of a heat exchanger 40 in the form of a charge air cooler whose housing 47 is again formed by an upper housing part 47.1 and a lower housing part 47.2, the housing parts 47.1 and 47.2 are practically identical to the housing parts 37.1 and 37.2 of FIG. 11 - U-shaped. The opposing separating edges 44.1, 44.2 of the housing parts 47.1, 47.2 in turn form a gap 45 into which engages an intermediate bottom 48 shown in more detail in FIG. In the present case, the block 1 has a first arrangement 1.1 and a second arrangement 1.2 of flow channels 5, the first arrangement 1.1 and the second arrangement 1.2 are arranged on opposite sides of the intermediate bottom 48. At least some of the components of the heat exchanger are soldered together, in particular soldered Nocolok. In another embodiment, all components of the heat exchanger to the at least one box cover, in particular the box lid, soldered together, for example, soldered Nocolok.

It can be seen from the illustrations in FIGS. 11 to 14 that a heat exchanger 30, 40 with the housing parts 37. 1, 37. 2, 47. 1, 47. 2 formed in a U shape can be cassetteized in a particularly simple manner, according to the embodiment shown in FIG. 11 and FIG. 12, a web 46 is used for sealing the gap 45 between the separating edges 44.1 and 44.2, while according to the embodiment shown in FIG. 13 and FIG. 14 an intermediate bottom 48 is used to seal the gap 45. The housing parts 37.1, 37.2 and 47.1, 47.2 are in this case soldered on one another - alternatively or additionally, the housing parts can also be welded together. In a manner not shown, the housing parts may also be additionally or alternatively mechanically joined together.

Fig. 15 shows a further embodiment of a heat exchanger 50, in which a housing 57 is formed in the manner shown in Fig. 16 with an upper L-shaped housing part 57.1 and a lower L-shaped housing part 57.2. Again, each L-shaped housing part 57.1, 57.2 forms a housing edge 59.1 or 59.2, and in each case a top wall 56 and side wall 58 of the housing 57. In the embodiment shown in Fig. 15 and Fig. 16 is a top wall 56 each with stiffening fields and In the embodiments shown in FIGS. 11 to 14, stiffening panels 52 and / or openings are provided on a side wall 38. At least some of the components of the heat exchanger are soldered together, in particular soldered Nocolok. In another embodiment, all components of the heat exchanger schers except for the at least one box lid, especially the box lid, soldered together, for example, soldered Nocolok.

As can be seen from FIG. 16, the first housing part 57.1 and the second housing part 57.2 are in turn formed counter to each other, so that the entire housing shell of the housing 57 is completed by assembling the same at a separating edge 54.1, 54.2. In the present case, each diagonally opposite separating edges 54.2 are provided with a bent tab 55, which - apart from the stiffening of the L-shaped housing part 57.1, 57.2 - also serves the better positive fastening of the housing parts 57.1, 57.2. For this purpose, a respective separating edge 54.1 is advantageously pushed under the tab 55 of the opposite separating edge 54.2 in order to provide the housing jacket of the housing 57. The housing parts 57.1, 57.2 are soldered to each other in the present case. At least some of the components of the heat exchanger are soldered together, in particular soldered Nocolok. In another embodiment, all components of the heat exchanger to the at least one box cover, in particular the box lid, soldered together, for example, soldered Nocolok.

Overall, the embodiments of a housing 37, 47, 57 illustrated in FIGS. 11 to 16 make it possible to realize a multi-part and nevertheless particularly stable housing.

In summary, a heat exchanger 10, 20, 30, 40, 50, in particular a charge air heat exchanger or exhaust gas heat exchanger, for heat exchange between a first fluid, in particular a charge air 3 or an exhaust gas, and a second fluid, in particular a coolant, indicated, which comprises: a in Block 1 separated and heat exchanging guidance of the first and second fluid, which block 1 a number of the first fluid flow through the flow channels 5 and the flow channels 5 receiving the second fluid through which can flow Housing 7, 37, 47, 57 has; at least one box lid 11, 11 ', which is fluidly connected to the flow channels 5, a bottom 15, 15', which is fixed to the box lid 11, 11 'and is provided with one or more through holes 17 for flow channels 5. In order to achieve an advantageous connection of the box lid 11, 11 'to the floor 15, 15', in particular in the event that box cover 11, 11 'and bottom 15, 15' consist of different materials, the invention provides that the box lid 11 , 11 'at the bottom 15. 15' via one or more compounds as screw 19 and / or Schlitzbördelung 26 is set.

17a shows a first perspective view of a further embodiment of the heat exchanger, and FIG. 17b shows a second perspective view of the heat exchanger, FIG. 17b showing the web 76 in an explosive representation. Compared to the previous embodiments, the web 76 is wider and has openings 73, in particular tongue-like openings on.

The housing 37 with the cover walls 36 is formed in such a way that the at least one cover wall 36 has openings 72. The openings 72 correspond to the openings 73. The openings 72 are formed substantially tongue-like. The web 76 also has a stiffening bead 76.1. Furthermore, the web 76 does not have openings 79.

Fig. 18 shows a perspective view of the heat exchanger block of the further embodiment. The features shown in Fig. 18 have the same reference numerals as in the previous figures.

Fig. 19 shows a sectional view of a tube bottom cutout. The tube sheet has a substantially circumferential groove. In the area of Nutgrundes at least one radius r is provided. The radius r in particular assumes values of 1 to 5 mm, in particular values of 2 mm to 3 mm. In the groove bottom, the bottom has a thickness d1. This thickness d1 changes to the thickness d2. The thickness d2 is arranged essentially according to the radius r. The thickness d1 has, for example, the value 3 mm. The thickness d2 has, for example, the value 2 mm.

Claims

claims

1. heat exchanger (10, 20, 30, 40, 50) for heat exchange between a first fluid, in particular a charge air (3) or an exhaust gas (3), and a second fluid, in particular a coolant, comprising:

- a block (1) for the separate and heat exchanging guidance of the first and second fluid, which block (1) a number of the first fluid flow through the flow channels (5) and the flow channels (5) receiving, can be flowed through by the second fluid housing ( 7, 37, 47, 57); - At least one box lid (11, 11 ') which is fluidly connected to the flow channels (5),

- A bottom which is fixed to the box lid (11, 11 ') and provided with one or more passage openings (17) for the flow channels (5), characterized in that the box lid (11, 11') on the ground ( 15, 15 ') via one or more

Connections as a) screw (19) and / or b) Schlitzbördelung (26) is fixed.

2. Heat exchanger according to claim 1 characterized in net that the box lid (11, 11 ') and the bottom (15.15') consist of different materials.

3. Heat exchanger according to claim 1 or 2 characterized in net that the bottom (15, 15 ') consists of a metal, in particular of aluminum.

4. Heat exchanger according to one of claims 1 to 3 characterized in net that the box lid (11, 11 ') consists of a non-metal, in particular of a plastic, a fiber composite, a ceramic or mixtures thereof.

5. Heat exchanger according to one of claims 1 to 4 characterized in net that the box lid (11, 11 ') and a seal (23, 23') are parts of a box (9, 9 ').

6. Heat exchanger according to one of claims 1 to 5 characterized in net that between the bottom (15, 15 ') and the box lid (11, 11') a

Seal (23, 23 ') is fixed.

7. Heat exchanger according to one of claims 1 to 6 characterized in net that the bottom (15, 15 ') has a bead (21, 21'), in particular in a bottom edge region.

8. Heat exchanger according to one of claims 1 to 7 characterized in net that in the bead (21, 21 ') a seal (23, 23') is arranged.

9. Heat exchanger according to one of claims 1 to 8 characterized in net that an end face (25, 25 ') of the box lid (11, 11') and a wall portion (28) of the box lid (11, 11 ') along the bead (25, 25 ') extends.

10. Heat exchanger according to one of claims 1 to 9 characterized in net that the box cover (11, 11 ') or a wall portion (28) of the box lid (11, 11') with an end face (25, 25 ') dull to the ground (15,

15 ') abuts, in particular the end face (25, 25'), the bead (21, 21 ') matures over mountain.

11. Heat exchanger according to one of claims 1 to 10 characterized in net that one end face (25, 25 ') of the box lid (11, 11') and a wall portion (28) of the box lid (11, 11 ') in the bead ( 21, 21 ') engages.

12. Heat exchanger according to one of claims 1 to 11 characterized in net that the bottom (15, 15 ') has a number of eyes (19 C) for receiving the screw (19), in particular at a corner and / or on one side of Soil (15, 15 ').

13. Heat exchanger according to claim 12, characterized in that two adjacent eyes (19 C) have a distance in the range of 40 to 90 mm, in particular 50 to 70 mm.

14. Heat exchanger according to one of claims 1 to 14 characterized in that a setting nut (19B) on the bottom (15, 15 ') or on the box lid (11,

11 ') is provided for forming the screw connection (19).

15. Heat exchanger according to one of claims 1 to 15 characterized in net that the flange (26) is formed as a flute, especially as a corrugated flute, formed.

16. Heat exchanger according to one of claims 1 to 15 characterized in net that a bottom thickness (D, D ', d) decreases radially outward over a bead (21, 21') away, preferably in a ratio of the largest bottom thickness (D) to the lowest floor thickness (d) in the range between 1.5: 1 and 4: 1, in particular between 2: 1 and 4: 1.

17. Heat exchanger according to one of claims 1 to 16 characterized in net that a bottom thickness (d) at least on a bead bottom less than at a radius along a further inner point of the soil

(15, 15 ').

18. Heat exchanger according to one of claims 1 to 17, characterized in that the bottom (15, 15 ') on the housing (7, 37, 47, 57) is fixed and / or the bottom (15, 15') the flow channels ( 5) in the one or more passage openings (17) receives.

19. Heat exchanger according to one of claims 1 to 18, characterized in that the housing (7, 37, 47, 57) along a flow direction having extending side walls (38, 58) and is formed in several parts, wherein at least one housing part (37.1, 37.2, 47.1, 47.2, 57.1, 57.2) a housing edge (39.1, 39.2, 39.3, 39.4, 49.1, 49.2, 49.3, 49.4, 59.1 , 59.2).

20. Heat exchanger according to one of claims 1 to 19, characterized in that at least one housing part (37.1, 37.2, 47.1, 47.2, 57.1, 57.2) at least partially a first and a second angularly aligned side wall (36, 38, 56 , 58) in one piece.

21. Heat exchanger according to one of claims 1 to 20, characterized in that at least one housing part (37.1, 37.2, 47.1, 47.2, 57.1, 57.2) is U-shaped, preferably the housing (7, 37, 47) consists of two, in particular formed in a counter-piece, U-shaped housing parts (37.1, 37.2, 47.1, 47.2) is formed.

22. Heat exchanger according to one of claims 1 to 21, characterized in that a separating edge (44.1, 44.2) of housing parts (37.1, 37.2, 47.1, 47.2) in the region of a side wall (38) is arranged.

23. Heat exchanger according to one of claims 1 to 22, characterized in that at least one housing part (57.1, 57.2) is L-shaped, preferably the housing (7, 57) consists of two, in particular formed in opposite pieces, L-shaped housing parts (57.1 , 57.2) is formed.

24. Heat exchanger according to one of claims 1 to 23, characterized in that a separating edge (54.1, 54.2) of housing parts (57.1, 57.2) is arranged in the region of a housing edge.

25. Heat exchanger according to one of claims 1 to 17, characterized in that the block (1) has a first arrangement (1.1) and a second arrangement (1.2) of flow channels, wherein the first arrangement (1.1) and the second arrangement (1.2 ) are arranged on opposite sides of a false bottom (49).

26. Heat exchanger according to one of claims 1 to 25, characterized in that an intermediate bottom (48) parallel to and / or substantially in a plane defined by the separating edges (44.1, 44.2) of housing parts (37.1, 37.2, 47.1, 47.2) plane is arranged.

27. Heat exchanger according to one of claims 1 to 26, characterized in that opposite separating edges (44.1, 44.2, 54.1, 54.2) of housing parts (37.1, 37.2, 47.1, 47.2, 57.1, 57.2) form a gap (45).

28. Heat exchanger according to one of claims 1 to 27, characterized in that an intermediate bottom (48) in a th by opposite Trennkan- (44.1, 44.2) of the housing parts (37.1, 37.2, 47.1, 47.2) formed

Gap (45) engages.

29. Heat exchanger according to one of claims 1 to 28, characterized in that a web (46) separating edges (44.1, 44.2) of housing parts (37.1, 37.2,

47.1, 47.2) covers, in particular on the outside of the housing (37, 47) is arranged.

30. Heat exchanger according to one of claims 1 to 29, characterized in that a web (46) has a bead (46.1), in particular a reinforcing bead.

31. Heat exchanger according to one of claims 1 to 30, characterized in that a bead (46.1) of a web (46) in a gap formed by opposite separating edges (44.1, 44.2) of housing parts (37.1, 37.2, 47.1, 47.2) (45 ) intervenes.

32. Heat exchanger according to one of claims 1 to 31, characterized in that housing parts (37.1, 37.2, 47.1, 47.2, 57.1, 57.2) are materially and / or mechanically joined together.

33. Heat exchanger (10, 20, 30, 40, 50) according to one of claims 1 to 32 in the form of a charge air heat exchanger, in particular -Kühlers.

34. Heat exchanger (10, 20, 30, 40, 50) according to one of claims 1 to 32 in the form of an exhaust gas heat exchanger, in particular -Kühlers.

35. Heat exchanger (10, 20, 30, 40, 50) according to one of the preceding claims, characterized in that at least two components of the heat exchanger (10, 20, 30, 40, 50) are soldered together.

36. Heat exchanger (10, 20, 30, 40, 50) according to one of claims 1 to 34, characterized in that all components of the heat exchanger (10, 20, 30, 40, 50) are soldered to each other except for the at least one box cover, in particular the two box covers.

37. Use of a heat exchanger (10, 20, 30, 40, 50) according to any one of claims 1 to 33 and 35 to 36 as intercooler for direct or indirect cooling of charge air (3) in a charge air system for an internal combustion engine of a motor vehicle.