US20080223562A1

US20080223562A1 - Heat Exchanger, in Particular Charge-Air Cooler or Exhaust Gas Cooler for an Internal Combustion Engine of a Motor Vehicle

Info

Publication number: US20080223562A1
Application number: US12/066,446
Authority: US
Inventors: Viorel Braic; Daniel Hendrix; Florian Moldovan
Original assignee: Behr GmbH and Co KG
Current assignee: Mahle Behr GmbH and Co KG
Priority date: 2005-09-12
Filing date: 2006-09-12
Publication date: 2008-09-18
Also published as: EP1929233B1; WO2007031274A1; EP1929233A1

Abstract

The invention relates to a heat exchanger, in particular a charge-air cooler or exhaust gas cooler for an internal combustion engine of a motor vehicle, having a first tank (2), having a second tank which is arranged at a distance from said first tank (2), and having a plurality of tubes (10) which serve to flow-connect the first (2) and the second tank, and having a chamber (38) which can be traversed by a coolant, which chamber (38) is provided between the two tanks (2) and through which chamber (38) run a plurality or all of the tubes (10) which serve to flow-connect the two tanks (2), wherein at least one of said two tanks (2) has a cover (12) and a base (14) which is connected to said cover (12) and is provided with one or more first passage openings (16) for receiving the tubes (10), wherein said base (14) has at least one first groove (58) into which a wall section (66) of the cover (12) of said same tank (2) extends.

Description

The invention relates to a heat exchanger, in particular charge-air cooler or exhaust gas cooler for an internal combustion engine of a motor vehicle.
Heat exchangers which are embodied as what are referred to as all-aluminum heat exchangers are already known. Furthermore it is known that such heat exchangers or all-aluminum heat exchangers can be used as charge-air coolers for an internal combustion engine. Known charge-air coolers have two boxes which are spaced apart and which are fluidically connected via a plurality of pipes, such as flat pipes. The charge air to be cooled then flows from one of the two boxes through the pipes and into the other of the two boxes. Between the pipes, intermediate spaces, through which coolant can flow, are provided transversely with respect to the direction of the longitudinal extent of said pipes. The pipe block which is formed by said pipes is surrounded here by a separate plate which is continuous around the periphery of the pipe block and forms a covering or enclosure so that a chamber is formed between the two boxes, through which chamber the pipes run. This enclosure is provided here with an inflow for coolant and an outflow for coolant. In such embodiments it is known for the two boxes of the charge-air cooler which are embodied as an all-aluminum heat exchanger to have a lid and a bottom. The lid forms here a type of hood which is closed off on its open side by the bottom. A plurality of openings into which the pipes are inserted are provided in the bottom. The bottom or bottoms can therefore also be referred to as a pipe bottom or pipe bottoms. The insertion of the pipes into said bottoms is generally implemented here before the relevant bottoms are joined together with the box lids which are respectively assigned to them. In such designs, on the one hand the pipes are connected to the bottoms and, on the other hand, the bottoms are connected to the boxes using suitable connecting means. It is known, for example, for the pipes to be soldered to the bottoms and for the bottoms to be soldered to the boxes.
It is known, for example, for the bottoms to be of precisely flat or planar design and for the lid to be fitted onto the bottom which is respectively assigned to it and to be soldered to said bottom. It is also known for the bottoms to be able to extend in or over the box. For this purpose, the bottoms can have, for example, a peripheral edge which projects in the longitudinal direction of the longitudinal axes of the pipe and which engages on the outside around the end of the lid which faces the bottom or is plugged into the lid in the region of this end of the lid. In this context, this projecting end of the bottom is soldered to the lid.
Furthermore, embodiments of such boxes in which there is no separate bottom provided and said boxes merely have a lid are known. In such designs, the pipes are widened in their end regions facing the respective box and are soldered to one another in the widened regions. The unit of the pipes which are soldered to one another in this way and widened at their end regions is plugged into the lid and soldered to the lid here. Since only the end regions of said pipes are widened, pipe intermediate spaces continue to be formed in the regions located between said pipes.
The invention is then based on the object of providing a heat exchanger such as a charge-air cooler or exhaust gas cooler for an internal combustion engine of a motor vehicle, in particular a heat exchanger which is embodied as an all-aluminum heat exchanger and which is easy to mount in terms of fabrication technology, can be satisfactorily sealed and has a good level of operational reliability.
According to the invention, in particular a heat exchanger as per claim 1 or as per claim 2 or as per claim 3 or as per claim 5 or as per claim 10 is proposed. Preferred developments are the subject matter of the subclaims.
In particular a heat exchanger is therefore proposed which has a first box and a second box which is arranged spaced apart from said first box. The first box is fluidically connected to the second box via a plurality of pipes. The heat exchanger also has a chamber through which a coolant can flow. The chamber can have, for example, one or more walls, arranged in its interior, for deflecting flowing medium; however, it can also be free of such walls which are arranged in its interior. The entry for the medium can be arranged, for example, on the side on which the exit for this medium is located or on the side lying opposite this side, or on another side. The chamber is arranged between the two boxes, with one or all of the pipes which connect said two boxes fluidically running through this chamber. At least one of said two boxes has a lid and a bottom which is connected to this lid and is provided with one or more first openings for the pipes. The pipes open into said first openings, and/or the pipes are inserted with their ends into said first openings. In the case of boxes preferably each have a lid and a bottom which is connected to said lid and provided with one or more first openings for the pipes. In this preferred embodiment, the pipes are plugged with one of their respective ends into the first openings in the bottom of the first box, and are plugged with their respective other end into the first openings in the bottom of the second box. There is provision for one of the boxes or for both boxes to be respectively embodied in such a way that the bottom of said box or the respective bottom of the respective box has a first groove into which a wall section of the lid of said box extends, or has a plurality of first grooves into which a respective wall section of the lid of the same box extends.
In addition, in particular a heat exchanger as per claim 2 is proposed. According to this embodiment, which, in a development, can also be combined with the abovementioned embodiment, there is provision that at least one covering, such as for example a covering plate, is provided for bounding the chamber arranged between the boxes, wherein the bottom of the first box and/or the bottom of the second box has at least a second groove into which (in each case) a (respective) wall section of the covering extends. The covering can be embodied, for example, in such a way that it bounds the chamber on one side; but it can also be embodied in such a way that it forms a casing which is essentially closed essentially around the periphery in order to bound the chamber, or can be embodied in some other way. It is also possible to provide that it is embodied in a plurality of parts or that a plurality of coverings or covering plates are provided which extend in the fashion mentioned above, in particular with an edge region, into a (respective) second groove or respective second grooves which is provided in the bottom of the first box and/or in the bottom of the second box. It is possible, for example, to provide in each case such a covering or covering plate on two sides, lying opposite one another, of the pipe block formed by the pipes.
In addition, in particular, a heat exchanger as per claim 3 is proposed. According to this embodiment, which, in a development, can also be combined with one or more, or all, of the abovementioned embodiments, there is provision for the chamber which is provided between the boxes to be bounded on two sides lying opposite one another by means of pipes which are embodied as flat pipes and via which the first box and the second box are fluidically connected. On two further sides lying opposite one another, that is to say two sides lying opposite one another which are different from the abovementioned sides and which extend between the boxes or extend from the first box to the second box and which, in particular, are positioned essentially transversely with respect to the planes formed by said flat pipes, the chamber is bounded in each case by means of a covering, in particular a covering plate. It is therefore possible, for example, to provide two covering plates which respectively bound the chamber on sides lying opposite one another.
According to one particularly preferred development, the chamber which is provided between the boxes is bounded by the boxes on the sides lying opposite one another in the direction of the longitudinal extent of the pipes. In one advantageous embodiment this is implemented in such a way that the chamber is bounded by the bottom of the first box on one of the two sides lying opposite one another in the direction of the longitudinal extent of the pipes, and is bounded by the bottom of the second box on the other of said two sides lying opposite one another in the direction of the longitudinal extent of the pipes.
In addition, in particular a heat exchanger as per claim 5 is proposed. Therefore, in particular a heat exchanger is proposed which has a first box and a second box which is arranged spaced apart from said first box. The first box is fluidically connected to the second box via a plurality of pipes which are flat pipes in one advantageous embodiment. The heat exchanger is embodied here in such a way that one of said two boxes has a lid, and preferably both of said boxes respectively has a lid, and a bottom which is connected to said lid and is provided with one or more first openings for the pipes.
The bottom of the first box and/or the bottom of the second box has at least one groove into which a wall section of the lid, or in each case a respective wall section of the lid, of the (respective) same box extends, to be precise in particular with its end region facing said (respective) bottom. Alternatively or additionally it is also possible to provide that the lid in question, of the first and/or second box, has at least one groove into which (in each case) a (respective) wall section of the bottom of the (respective) same box extends. It is to be noted that that embodiment of the alternative embodiments in which at least one groove is provided in the bottom of the first box and/or in the bottom of the second box and into which a wall section of the respectively assigned lid extends provides, in various application cases, advantages over the alternative embodiment in which the lid of the first box and/or the lid of the second box has at least one groove into which (in each case) a (respective) wall section of the bottom of said (respective same) box extends.
As is also shown by the statements above, the embodiments of the box and/or of the bottom and of the lid of the box and the interaction of the box and bottom and the interaction of the bottom and covering refer to one of the two boxes or to both boxes. The same applies to the developments which are disclosed in this regard within the scope of this disclosure. It is, for example, also possible to provide that the embodiment of the box or its bottom and/or lid and the interaction of the bottom of the box with a covering with respect to the first box and the second box is different depending on different embodiments or developments of the invention. In order to make the presentation simpler in this disclosure, the embodiments or developments are largely explained with respect to a box or its lid or its bottom or the interaction of this box with one or more coverings, in which case this is intended in particular to state that the respective embodiment can be provided with respect to the first and/or second box.
In one advantageous development there is provision that the groove or the first groove or the second groove is a peripheral, or an essentially peripheral, groove. This may be implemented, for example, in such a way that the bottom has a peripheral groove and/or peripheral first groove and/or peripheral second groove in an essentially outer edge region. In this context it is possible to provide that the lid extends with its preferably peripheral wall section which is located at the end facing the bottom into the first groove in question, in particular in a peripheral fashion. In one advantageous embodiment, the groove, or first groove or second groove, which is provided in the bottom is a groove which is embossed or impressed into the bottom and is particularly preferably peripheral. The groove, or first groove or second groove, is preferably provided in an edge region or outer edge region of the bottom, to be precise in particular in the region which is positioned between the arrangement of the first openings in the bottom and the outer edge of said bottom. The groove, or first groove or second groove, can be embossed or impressed here in such a way that it forms the groove and/or first groove and/or second groove on one side of the bottom and a corresponding (first or second) projection or a corresponding (first or second) profile elevation, in particular bead, on the other side. It is to be noted that the formulation “groove and/or first groove and/or second groove” refers to alternative embodiments which, however, can also be provided in a corresponding combination according to one development.
According to one particularly preferred development of the invention there is provision for a first profile elevation to be spaced apart transversely, in particular perpendicularly, with respect to the direction of the longitudinal extent of the pipes, by the pipe block which is formed by the pipes, in particular flat pipes, with the result that at least a first intermediate space is formed between this pipe block and this first profile elevation transversely, in particular perpendicularly, with respect to the direction of longitudinal extent of the pipes, wherein at least one covering, in particular covering plate, is provided for bounding the chamber, and wherein an, in particular end-side wall section or edge of this covering extends into this first intermediate space. In this case it may be provided that said wall section of the covering which extends into the first intermediate space formed between the pipe block and the first profile elevation essentially bears against said pipe block and/or said first profile elevation and/or is soldered to pipes of the pipe block and/or to the first profile elevation, for example by means of solder plating.
A preferred embodiment according to which, as previously mentioned, a wall section of the covering extends into a first intermediate space of the aforesaid type and according to which a wall section of the lid which is assigned to the respective bottom extends in a first groove of this lid is particularly advantageous, in which embodiment it is, in particular, possible to provide that the first profile elevation is constructed by embossing or impressing the first groove into said bottom (on the other side of said bottom).
According to one advantageous embodiment there is provision that the bottom has one or more second openings which are different from the first opening or openings, and the covering has, on its side facing the bottom, one or more projections, for example clips, each of which extends in or through a second opening in each case. The first openings are in this context those which are formed in the bottom in order to hold the pipes. The second openings can, for example, be provided in the groove base of the at least one first groove of the bottom.
In an advantageous development, the bottom is soldered to the lid, to be precise in particular soldered in a fluid-tight fashion. The soldering can be effected, for example, by means of solder plating or in some other way. It is also preferred for the at least one covering, in particular covering plate, to be soldered to the bottom.
In one advantageous embodiment there is provision that the solder by means of which the bottom and the lid are soldered is provided in the at least one first groove which is provided in the bottom and into which at least one wall section of the lid extends or, alternatively, in the region of the intermediate space formed between the second profile elevation and the pipe block.
The covering is advantageously soldered to the second profile elevation and/or to the sections of pipes of the pipe block which are located there in the region of the intermediate space which is formed between said second profile elevation of the bottom and the pipe block, or in an alternative embodiment is soldered in the region of the second groove, with the result that solder is provided in this second groove. In an advantageous development the soldering is effected by means of solder plating.
According to one advantageous development, the bottom is of essentially flat or planar construction. It is possible to provide that all the parts of the box or of both boxes, that is to say in particular the (respective) bottom and the lid, are formed from sheet metal. The at least one covering can also be formed from sheet metal. The bottom or bottoms is/are advantageously constructed in one piece and/or fabricated from a single-piece component.
There is, in particular, provision that the pipes, or all the pipes, are spaced apart in the direction viewed transversely with respect to the direction of the longitudinal extent so that intermediate spaces between the pipes are formed for a medium (in particular coolant) to flow through which is different from a medium (in particular exhaust gas or charge air) which is flowing through the pipes. Such intermediate spaces between pipes can, in particular, be respectively provided between adjacent pipes. The pipes can form one or more ducts in their interior. It is to be noted that the unit of the pipes, in particular in their mounted arrangement, is referred to as “pipe block” within the sense of this application. The term “pipe block” therefore does not exclude the intermediate spaces between pipes which have been referred to, and is not intended, in particular, to indicate that the pipes have to be in contact with one another.
For example it is also possible to provide that turbulence inserts are placed in the intermediate spaces between the pipes. Said turbulence inserts may be in contact, for example, with the respectively adjacent pipes and/or be soldered to them, to be precise in particular by means of solder plating.
The chamber can have an inlet opening for a coolant, such as water or the like, as well as an outlet opening for the coolant.
It is possible to provide that fins are provided in the pipes, to be precise in particular in order to improve the thermal conduction.
There is particularly preferably provision that the heat exchanger is a charge-air cooler or an exhaust gas cooler for an internal combustion engine of a motor vehicle. In this context it is possible to provide that the charge air or the exhaust gas can be cooled by means of this charge-air cooler or exhaust gas cooler. It is possible to provide that the charge air or the exhaust gas enters one of the two boxes of the heat exchanger and subsequently flows through the pipes into the other of the two boxes. In this context a coolant can flow through the intermediate spaces between the pipes and/or the chamber in question.
In one advantageous embodiment, the heat exchanger according to the invention is what is referred to as an all-aluminum heat exchanger and/or is essentially composed completely of aluminum.
The lid is preferably constructed in the form of a hood.
The pipes via which the first box is fluidically connected to the second box are preferably, in particular all, flat pipes. In addition, it is preferred that the pipes, or all the pipes via which the first box is fluidically connected to the second box run parallel to one another. The pipes via which the first box is fluidically connected to the second box are, in particular, arranged between the first box and the second box.
In a further advantageous embodiment, the heat exchanger has at least one cutout, in particular a plurality of cutouts. A force can particularly advantageously be applied to the pipes through the cutout, in particular during the joining process, in particular during the soldering process.
In a further advantageous embodiment, the cutout has a width e, h and a length d, i. In particular, the at least one cutout in the first side wall section has a width h and a length i. The at least one cutout in the second wall section has a width e and a length d.

In the text which follows, exemplary embodiments of the invention will be explained in more detail with reference to the figures, of which:

FIG. 1 shows a first exemplary embodiment of a heat exchanger according to the invention in a partial view, wherein the lid and the bottom of the box as well as a number of pipes and the covering are illustrated cut away.

FIG. 2 shows the embodiment according to FIG. 1 in an exploded view;

FIG. 3 shows the embodiment according to FIG. 2 but the bottom of the box is illustrated in a noncutaway fashion;

FIG. 4 shows the embodiment according to FIG. 3 but the pipes are illustrated in a noncutaway fashion;

FIG. 5 shows the embodiment according to FIG. 3 with a partially removed covering;

FIG. 6 shows the embodiment according to FIG. 2 with a partially removed covering;

FIG. 7 shows a first oblique view of the side of the bottom facing the interior of the box according to the first exemplary embodiment;

FIG. 8 shows a second view or oblique view of the side of the bottom facing the interior of the box according to the first exemplary embodiment;

FIG. 9 shows an oblique view of the side of the bottom facing away from the interior of the box according to the first exemplary embodiment;

FIG. 10 shows a side view of the embodiment according to FIGS. 1 to 9;

FIG. 11 shows an exploded view of a second exemplary embodiment of a heat exchanger according to the invention in a partial view;

FIG. 12 shows the bottom of the box from the embodiment according to FIG. 11 in an oblique view;

FIG. 13 shows an exploded view of a further embodiment of the heat exchanger;

FIG. 14 shows an isometric representation of the assembled heat exchanger;

FIG. 15 shows an embodiment of the chamber side wall and of the side wall sections;

FIG. 16 shows a further embodiment of the chamber side wall and of the side wall sections;

FIG. 17 shows a further embodiment of the chamber side wall and of the side wall sections;

FIG. 18 shows a further embodiment of the chamber side wall and of the side wall sections;

FIG. 19 shows a further embodiment of the chamber side wall and of the side wall sections;

FIG. 20 shows a further embodiment of the chamber side wall and of the side wall sections;

FIG. 21 shows a further embodiment of the chamber side wall and of the side wall sections with a plate;

FIG. 22 shows an isometric representation of a further embodiment of the connection of the lid to the bottom and to the side covering; and

FIG. 23 shows a sectional representation of the further embodiment of the connection of the lid to the bottom and to the side covering.

In the text which follows, a first exemplary embodiment of a heat exchanger 1 according to the invention will firstly be explained with reference to FIGS. 1 to 10.
The heat exchanger 1, which is, for example, a charge-air cooler or exhaust gas cooler for an internal combustion engine has a first box 2 and a second box (not illustrated) which is arranged at a distance from said first box 2.
The heat exchanger 1 has a plurality of pipes 10 by means of which the first box and the second box are fluidically connected. This is effected in such a way that the pipes 10 each open with one of their ends into the first box, and open at their second end, opposed to the first end, into the second box.
The first box 2 has a lid 12 and a bottom 14 which is connected to said lid. In a corresponding way, the second box has a lid and a bottom which is connected to said lid, which is not shown in the figures.
The bottom 14—and the same applies to the bottom of the second box—has a plurality of first openings 16. The pipes 10, which have a straight extent, are respectively plugged with their ends 18, facing the first box, into the first openings 16 in the bottom 14 of the first box 2. In a corresponding way, the pipes 10 are plugged with their second ends opposed to the first ends 18 and not illustrated, into the openings in the bottom of the second box. The respective first pipe ends 18 and second pipe ends in question are soldered to the bottom 14 of the first box 2 and to the bottom of the second box, respectively, which is preferably implemented by means of solder plating.
The lid 12 of the first box is embodied essentially in the form of a hood. The lid of the second box is also embodied essentially in the form of a hood, in which case it is to be noted that the precise shape of the corresponding lids can be made different or identical.
The lid 12 of the first box, and the same applies to the lid of the second box, forms an end region 20 which faces the pipes and/or the respective other box and which is closed off around the periphery. This end region 20 is closed off around the periphery in such a way that it is closed off around a virtual axis running in the longitudinal direction 22 of the pipes 10 through the box 2. In this context it is possible to provide, and the same can apply to the lid of the second box, that that end of the lid 12 of the first box 2 which faces the other box, that is to say here the second box, is closed off around the periphery, at least with the exception of clips 76 which will be referred to below, and the end of said lid lies essentially in a plane, in particular completely, which is perpendicular to the longitudinal direction 22 of the pipes.
The lid 12 of the first box 2, and the same can also apply to the lid of the second box, is constructed in such a way that it forms four side walls 24, 26, 28, 30 and a wall lying opposite the bottom 14 and/or a wall section 32 lying opposite the bottom 14. The first side wall 24 lies opposite the second side wall 26, and the third side wall 28 lies opposite the fourth side wall 30. Said four side walls 24, 26, 28, 30 are each oriented essentially transversely with respect to the bottom 14 of the first box 2. The first side wall 24 and the second side wall 26 are each oriented essentially transversely with respect to the third side wall 28 or the fourth side wall 30. It is to be noted that the side wall 30 is concealed in each of FIGS. 1 to 6.
As becomes clear in particular from the side walls 24, 26, said side walls must, however, certainly not be of flat design. The figures show that here the side walls 24, 26 are merged in a curved fashion with the wall 32 lying opposite the bottom, with a relatively large degree of curvature being provided. The shape of the lid 12 can also differ significantly from the shape shown in the figures.
The lid 12 can additionally be formed from a single-piece component or single piece of sheet metal, which is however, not shown in FIGS. 1 to 10.
According to FIGS. 1 to 10, the third side wall 28 and the fourth side wall 30 are constructed as parts which are manufactured separately from the side wall 24, 26 and the wall 30. The walls 24, 26, 32 are formed there from a single-piece component. However, in this regard there is a large degree of variety, which can also be provided alternatively in the embodiment according to FIGS. 1 to 10. In FIGS. 1 to 10 it is shown that slots 34, 36 into which the walls 28, 32 are plugged are provided in the unit composed of the walls 24, 26, 32, said walls 28, 32 being soldered there.
A chamber 38 is formed between the first box 2 and the second box. Viewed in the direction 22 of the longitudinal extent of the pipes 10 and/or on the sides lying opposite the direction 22 of the longitudinal extent of the pipes 10, this chamber 38 is bounded on one of its sides by the bottom 14 of the first box 2 and on the other side by the bottom of the second box. On the four remaining sides, the chamber 38 is bounded by a covering 40. This covering 40 forms here a casing which is closed off essentially around the periphery. The covering 40 is formed here by a first chamber side wall 42, a second chamber side wall which lies opposite the first chamber (concealed in the figures), a third chamber side wall running transversely with respect to the first chamber side wall 42 and second chamber side wall, and a fourth chamber side wall which lies opposite this third chamber side wall 44 and is concealed in the figures. The first chamber side wall 42 and the second chamber side wall each extend essentially transversely with respect to the planes of the flat pipe 10. The four chamber side walls are each formed by a piece of sheet metal, the four pieces of sheet metal being able to be soldered to one another, for example. However, they can, for example, also be formed by a piece of sheet metal which is correspondingly shaped and, for example, soldered to end-side edges.
The flat pipes 10 are oriented parallel to one another, to be precise in such a way that the planes which pass through them extend parallel to one another. The flat pipes 10 form here a row of pipes; alternatively it is also possible, for example to form a plurality of rows of pipes by the flat pipes 10. The arrangement formed from the flat pipes is also referred to as a pipe block 46. The flat pipes 10 are spaced apart from one another so that intermediate spaces 48 between the pipes are formed between the flat pipes 10 or between the respectively adjacent flat pipes 10. Turbulence inserts 50 are provided in said intermediate spaces 48 between the pipes and said turbulence inserts 50 can, for example, be soldered to the respectively adjacent flat pipes 10. Fins (not illustrated) are provided in the pipes 10.
In principle, the covering 40 can essentially be spaced apart completely from the pipe block 46. However, there is provision here for the third chamber side wall 44 and fourth chamber side wall to bear against the pipe block 46, essentially completely, in which case said two chamber side walls bear against end-side pipes, lying opposite one another, of the row of pipes or of the pipe block. The first chamber side wall 42 and second chamber side wall essentially or virtually bear with their peripheral edge regions 52 against the pipe block and are otherwise spaced apart from the pipe block 46 in order to form a distribution region for the coolant in order to distribute the coolant into the intermediate spaces 48 between the pipes or to the turbulence inserts 50. For this purpose, the first chamber side wall 42 and second chamber side wall and/or the coverings which correspond to them are correspondingly shaped, for example with a curved transition region 54.
According to an alternative embodiment (not shown in the figures) the third 44 and fourth chamber side wall can also be omitted so that the chamber 38 is formed at the corresponding locations instead by the flat pipes 10 which are located on the outside in the row of pipes and/or their outer surfaces. In this context, the remaining coverings 40 and/or the first chamber side wall 42 and second chamber side wall can be soldered, for example in their edge regions 52 to the pipe block 46, to be precise in particular in a peripheral or sealed fashion.
A coolant can flow through the chamber 38. For this purpose, the covering or chamber wall has an entry opening and an exit opening for coolant. One of said openings (reference symbol 56) is shown in the figures, a connector being provided thereon.
The flat pipes 10 run through the chamber 38 so that, in this chamber 38 heat can be transmitted between the medium or gas such as exhaust gas or charge air flowing through the pipes and the coolant flowing through said chamber 38.
The bottom 14 of the first box 2 has an embossed or impressed first groove 58. This first groove 58 is provided in this bottom 14, in the outer edge region 60 of said bottom 14. The first groove 58 is a peripheral groove and/or is closed off at the periphery or extends in a closed-off fashion at the periphery about a longitudinal axis or the longitudinal axes of the pipes 10 and/or runs around said longitudinal axis or axes. The first groove 58 is provided on the side of the bottom 14 facing away from the pipe block 46. The first groove 58 is embossed or impressed into the bottom 14 in such a way that on the side of the bottom 14 facing the pipe block 46 a first profile elevation 62 is formed by this embossing or impressing. The first profile elevation 62 is consequently also constructed in a peripheral fashion. Such an embodiment with a first profile elevation and first groove is embossed or impressed into the bottom of the second box in a corresponding way.
The first profile elevation 62 is spaced apart, transversely or perpendicularly with respect to the direction 22 of the longitudinal extent of the pipes 10, from the pipe block 46 which is formed by the flat pipes 10, with the result that a first intermediate space 64, running around the pipe block 46 here, is formed between said pipe block 46 and said first profile elevation 62 transversely or perpendicularly with respect to the direction of the longitudinal extent 22 of the pipes 10. The first intermediate space 64 is bounded laterally, on the one hand, by the first profile elevation 62 and, on the other hand, by a section or by sections of the pipe block 46. It is possible to provide that the intermediate spaces 48 between the pipes are closed off in the region of the first intermediate space 64 by means of the turbulence inserts 50, so that the pipes 10 of the pipe block 46 or its sections which are located in the region of the first intermediate space 64 form, with those sections of the turbulence inserts 50 which are located in the region of the first intermediate space 64, a boundary wall for the first intermediate space 64 which is essentially closed off. Viewed in the longitudinal direction 22 of the pipes 10, the first intermediate space 64 is bounded by the bottom 14. On the side facing away from the lid 12 of the first box 2, the first intermediate space 64 is open. The first intermediate space 64 therefore forms a type of groove or a groove through the interaction of the bottom 14 and its first profile elevation 62 with sections of the pipes 10 and, if appropriate, with sections of the turbulence inserts 50. In a corresponding way, a first intermediate space is provided in the region of the bottom of the second box, which is bounded in a corresponding way by a first profile elevation of the bottom of the second box, by said bottom and by sections of the pipes 10 and if appropriate by sections of turbulence inserts 50.
The lid 12 of this first box 2 or a wall section 66 of the lid 12 of said first box 2 extends into the first groove 58 of the bottom 14 of said first box 2. This is effected in particular in such a way that said lid 12 extends with its peripheral end, facing the pipe block 46, or its end region into said first groove 58. It is possible to provide that the wall section 66 is clamped in the first groove 58. The lid 12 or its wall section 66 is soldered into the first groove 58 with the bottom, to be precise in particular by means of solder plating. As a result, the solder can collect satisfactorily in the groove so that the solder quality or the quality of the solder points is improved and the leakage rate after soldering is reduced compared to known embodiments. In addition, the contact between the bottom 14 and the lid 12 is improved by means of the first groove 58. In addition, any unevennesses in the bottom 14 have a smaller effect on the quality of the connection between the bottom 14 and lid 12 since they are taken up by the groove or the connection by means of the first groove 58 in which there is solder or solder can collect, causes any unevennesses to be “absorbed” and not form potential leakages after the soldering process to the degree which occurs in previously known embodiments. In a corresponding way, the lid of the second box or a wall section of the lid of the second box extends into the first groove which is provided in the bottom of the second box.
The covering 40 extends with a wall section 68 into the first intermediate space 64. This is effected here in such a way that the peripheral end region, facing the first box 2, of the covering 40 or the respective first chamber side wall 42, second chamber side wall, third chamber side wall 44 and fourth chamber side wall extends into said first intermediate space 64. In said first intermediate space 64, the covering 40 is soldered to the bottom 14 and/or the pipes 10 and/or the turbulence inserts 50. In a corresponding way, an end region of the covering 40, and respectively the end region facing the second box, of the respective first chamber side wall 42, second chamber wall, third chamber side wall 44 and fourth chamber side wall extends into an intermediate space which is formed in a corresponding way by means of the first profile elevation at the bottom of the second box. It is to be noted that in the alternative embodiment in question, in which no third chamber side wall 44 or fourth chamber side wall is provided, only edge regions 68 of the first chamber side wall 42 and second covering or chamber side wall extend into the respective first intermediate space 64 or the respective first intermediate spaces, respectively.
An inlet opening for gas, in particular exhaust gas or charge air, is provided, and an outlet opening for said gas, in particular exhaust gas or charge air is provided. One of said openings, which may be said inlet opening or said outlet opening, and provided here in the lid 12 of the first box 2, is provided with the reference symbol 70, a connector being provided in the region of said opening. The other opening can, for example, be provided on the second box.
The bottom 14 of the first box 2, and the same applies to the bottom of the second box, has a plurality of, here, for example, four second openings 72. Said second openings 72 are provided here in the base groove 74 of the first groove 58 and/or in the first profile elevation 62. The second openings 72 are respective slot-shaped. The lid 12 of the first box 2, and the same applies to the lid of the second box, has a plurality of, here for example four, projections which are clips 76 here. For example, as in this case a clip 76 is respectively provided on the first side wall 24, on the second side wall 26, on the third side wall 28 and on the fourth side wall 30. Said clips 76 project from the lid 12 in the direction facing the bottom 14. The clips 76 extend in or through the second openings 72.
The bottom 14 of the first box 2, and respectively the bottom of the second box, is essentially of planar or flat construction.
FIGS. 11 and 12 show a further exemplary embodiment of a heat exchanger 1 according to the invention, which can be used, for example, as a charge-air cooler or exhaust gas cooler for an internal combustion engine of a motor vehicle.
In the embodiment according to FIGS. 11 and 12, the lid 12 is of a rounder and flatter construction compared to the embodiment according to FIGS. 1 to 10. In addition, the embodiment according to FIGS. 11 and 12 shows that the lid 12 can also be of a more a symmetrical construction, than is the case in the embodiment according to FIGS. 11 and 12.
In addition, FIGS. 11 and 12 show a connector which is integrally formed in the region of the opening 70 and whose axis runs obliquely with respect to the longitudinal direction 22 of the pipes and not, as in the embodiment according to FIGS. 1 to 10, in the longitudinal direction 22 of the pipes.
In the embodiment according to FIGS. 11 and 12, the connector which is provided in the region of the opening 56 is, in contrast to the embodiment according to FIGS. 1 to 10, not given a straight shape but rather a bent shape and moreover is integrally formed onto the covering 40 at a different location.
The turbulence inserts 50 are not shown or not provided in the embodiment according to FIGS. 11 and 12 but can be provided and arranged in an advantageous development according to the embodiment in FIGS. 1 to 10.
The second openings 72 and the clips 76 are not shown or not provided in the embodiment according to FIGS. 11 and 12, but can be provided and arranged in an advantageous development according to the embodiment in FIGS. 1 to 10.
Moreover, the heat exchanger 1 according to FIGS. 11 and 12 is essentially constructed in the same way as the heat exchanger according to FIGS. 1 to 10.
FIG. 13 shows a further exemplary embodiment of a heat exchanger 1 according to the invention, which heat exchanger 1 can be used, for example, as a charge-air cooler or exhaust gas cooler for an internal combustion engine of a motor vehicle. The parts of the heat exchanger according to FIG. 13 are preferably soldered to one another, to be precise in particular by means of solder plating.
FIG. 13 shows a connector 78 which is soldered on in the region of opening 70 and whose axis runs obliquely with respect to the longitudinal direction 22 of the pipes, and not in the longitudinal direction 22 of the pipes as in the embodiment according to FIGS. 1 to 10. The connector which is provided in the region of the opening 56 is given a straight shape in the embodiment according to FIG. 13.
The turbulence inserts 50 are not shown or not provided in the embodiment according to FIG. 13 but they can be provided and arranged in an advantageous development according to the embodiment in FIGS. 1 to 10. The second opening 72 and the clips 76 are not shown or not provided in the embodiment according to FIG. 13 but can be provided and arranged in an advantageous development according to the embodiment in FIGS. 1 to 10.
According to FIG. 13, the third chamber side wall 44 is subdivided, like the fourth chamber side wall which is not shown, into a first wall section 80 and a second wall section 82. The first wall section 80 is constructed here as a shaped edge region of the first chamber side wall 42, and the second wall section is constructed as a shaped edge region of the second chamber side wall which is not shown. As a result, the first and second chamber side walls engage around the pipe block 46 and therefore act, if appropriate, as a lost soldering device, as a result of which the fabrication process is simplified. As is apparent from FIG. 13, the first wall section 80 and the second wall section 82 each have cutouts 84 so that saving in terms of material can be achieved by virtue of the fact that the pipe wall of the outermost pipe is reinforced only at the points which are loaded most heavily.
Moreover, the heat exchanger 1 according to FIG. 13 is essentially constructed in the same way as the heat exchanger according to FIGS. 1 to 12.
As the exemplary embodiments show, the invention forms a basis of reducing leakage rates in a heat exchanger after soldering compared to the embodiments mentioned at the beginning, and for improved contact between the bottoms and the assigned lids and between the bottoms and the covering and the side parts and the water casing, respectively. In addition, the exemplary embodiments show that at least preferred developments of the invention have made it possible to provide a good securing possibility for the lids and the covering or the side parts or chamber side walls or the water casing by means of one or more grooves or beads which are respectively impressed or embossed into the bottoms.
As shown, it is possible, in particular for this purpose, to provide that the respective lid is held in a respective first groove of the bottom which is assigned to said lid, with this groove or bead or a first profile elevation which is formed by the corresponding embossing or impressing serving as a support or for securing the covering or the side parts or the chamber side walls or the water casing. In addition, from the exemplary embodiments it is apparent that the invention forms the basis for “taking up” any unevennesses in the bottom by means of the first groove so that the contact between the bottom and lid is improved, and a better soldering quality and a better quality of the soldering locations is therefore achieved. In addition, the invention forms the basis for allowing solder to collect in the first groove, and thus achieving an improved soldering quality and a better quality of the soldering locations. Moreover, in the configurations according to the exemplary embodiments the lids and bottoms are premounted so that time is saved on preassembly. Moreover, the bottom bead or first profile elevation can be used for fixing or as a means of fixing the side parts and/or the water casing and/or the covering and/or the chamber side walls and as a soldering surface, as a result of which the soldering quality and the quality of the soldering parts can be improved.
FIG. 24 shows an isometric representation of an assembled heat exchanger 1. Identical features are provided with the same reference symbols as in the preceding figures.
The heat exchanger 1, in particular the charge-air cooler or exhaust gas cooler for an internal combustion engine of a vehicle, has a number of pipes 10 which are arranged in a covering 40. In the illustrated exemplary embodiment, the covering 40 has a first covering element 87 and a second covering element 88. In the illustrated exemplary embodiment, the first covering element 87 is identical to the second covering element 88. The covering elements 87, 88 enclose the number of pipes 10. A covering opening 89 is formed between the first covering elements 87 and the second covering element 88, in particular covering openings 89 are formed on each of the two chamber side walls 44 lying opposite one another.
In another embodiment (not illustrated), the first covering element 87 is of a different construction from the second covering element 88.
In a further embodiment, (not illustrated), the first covering element 87 and the second covering element 88 are constructed in one part. The covering element 87, 88 which is constructed in one part has a covering opening 89.
The covering 40 has at least one stamped-out projection 90, in particular two stamped-out projections. The stamped-out projections 90 are formed towards the outside from the covering 40. In another embodiment (not illustrated), the covering does not have any stamped-out projections 90.
The covering 40 has at least one inlet and outlet opening 56, in particular two inlet/outlet openings 56. The outlet openings are embodied essentially cylindrically as connectors, in particular from the stamped-out projection 90. The connectors have, adjacent to the covering 40 or adjacent to the stamped-out projection 90, a first, essentially cylindrical section which merges with at least a second cylindrical section. The first cylindrical section has a larger diameter than the second cylindrical section so that, in particular, the first cylindrical section tapers in order to merge with the second cylindrical section.
In the illustrated embodiment, the first connector and the second connector are arranged slightly offset perpendicularly with respect to the direction of flow through the heat exchanger. In another embodiment (not illustrated), the first and second connectors can be arranged one on top of the other, i.e. having no vertical offset in the perpendicular direction with respect to the direction of flow. In another embodiment (not illustrated), the connectors have a relatively large offset.
The heat exchanger 1 has two lids 12. The lid 12 has at least one connector 78. The connector 78 has at least one opening 70. In the illustrated embodiment, there can be I flow through the heat exchanger 1.
In another embodiment (not illustrated) there can be U flow through the heat exchanger 1. In particular, the heat exchanger 1 then has a lid 12 with two connectors 78. The other lid 12 lying opposite does not have an opening 70 and does not have a connector 78.
In the illustrated embodiment, the heat exchanger 1 has at least one side wall section 80, in particular two side wall sections 80, 82 of the chamber side wall 42, 44. In particular, the heat exchanger has two chamber side walls in each case.
The side wall section 80 has at least one cutout 84, in particular in each case four cutouts 84 on one side in the illustrated exemplary embodiment. The at least one cutout 84 forms a covering opening 89 together with a further material cutout between the side wall section 80 and the side wall section 82. The covering opening. At least one section of the pipe 10 can be seen from the outside through the covering opening.
In another embodiment (not illustrated), the opening 89 is closed off at least in certain sections, in particular completely, by a plate, (not illustrated). The pipe 10 can then no longer be seen from the outside.
FIG. 15 shows an embodiment of the chamber side wall and of the side wall sections. Identical features are provided with the same reference symbols as in the preceding figures.
In the illustrated exemplary embodiment, the third chamber side wall 44 has four cutouts 84. The first side wall section 80 has two of said cutouts 84. The second side wall section 82 has two of said cutouts 84. Between the first side wall section 80 and the second wall section 82 a free space is formed. The free space has the covering opening 89. The covering opening 89 comprises the four cutouts 84.
The first side wall section 80 has a first width b. The cutouts 84 in the first wall section 80 have a width h and a length i. A first edge section of the cutout 84 with the width h is arranged essentially perpendicularly with respect to a second edge section of the cutout 84 with the length i. The junction between the first edge section and the second edge section is embodied as a radius in the illustrated exemplary embodiment. In another exemplary embodiment (not illustrated), the junction can be embodied in a polygonal fashion. The cutout 84 which is located closest to an upper edge 92 is arranged at a first distance f from the upper edge 92 of the first wall section 80. A second cutout 84 in the first wall section 80 is arranged at distance g from the upper edge 92. Further cutouts 84 (not illustrated) are arranged at a distance g−f from one another. The first side wall section 80 has a distance m=c−a−b from the second side wall section 82, where a=k+e and k≧2.5 mm and b=h+l where l≧2.5 mm. The distance m assumes values 0≦m≦c−k−l where k≧2.5 mm and l≧2.5 mm.
Two adjacent cutouts 84 in the first side wall section 80 are at a distance r from one another, where r≧0 mm. The second side wall section 82 has a width a. The cutouts 84 have a width l and a length d. A first edge section of the cutout 84 with the width e is arranged essentially perpendicularly with respect to a second edge section with the length d. The at least one junction between the first edge section and the second edge section is embodied as a radius. In another embodiment (not illustrated), the junction is embodied in a polygonal fashion.
The cutout 84 which is closest to the upper edge 92 is arranged at a distance n from the upper edge 92. A further cutout 84 is arranged at a distance o from the upper edge 92. In other embodiments (not illustrated), further cutouts 84 are at a distance o−n from one another. Two adjacent cutouts 84 in the second side wall section 82 are at a distance p from one another, where p≧0 mm.
In the illustrated exemplary embodiment, the width a is equal to the width b and/or the distance f is equal to the distance n and/or the width e is equal to the width h and/or the length i is equal to the length d and/or the distance g is equal to the distance o and/or the distance k is equal to the distance l and/or the distance p is equal to the distance r.
In another embodiment (not illustrated), the width a is not equal to the width b and/or the width e is not equal to the width h and/or the length d is not equal to the length i and/or the distance k is not equal to the distance l and/or the distance n is not equal to the distance f and/or the distance o is not equal to the distance g and/or the distance p is not equal to the distance r.
In the illustrated embodiment, the cutouts 84 in the first side wall section 80 have the same length i and the same width h, where the width h=0≦h≦b−l where h≧2.5 mm. Likewise, the cutouts 84 in the second side wall section 82 have the same length d and the same width e, where the width e=0≦e≦a−k where k≧2.5 mm.
In another embodiment (not illustrated), the cutouts 84 in the first side section 80 have different lengths i and/or a different width h.
In another embodiment (not illustrated), the cutouts 84 in the second side section 82 have different lengths d and/or a different width e.
In another embodiment (not illustrated), the first side section 80 has at least one cutout 84, and the second side section 82 does not have a cutout 84.
In another embodiment (not illustrated), the second side section 82 has at least one cutout 84, and the first side section 80 does not have a cutout 84.
FIG. 16 shows a further embodiment of the chamber side wall and of the side wall sections. Identical features are provided with the same reference symbols as in the preceding figures.
In the illustrated exemplary embodiment, in contrast to FIG. 15, the distance m between the first side wall section 80 and the second side wall section 82 assumes particularly small values m≧0 mm. When m=0 mm there is a butt joint between the first side wall section 80 and the second side wall section 82. In particular, a joining device, in particular soldering device (not illustrated), engages through the recess 84 and exerts a pressure on the pipes 10 (not illustrated). The covering 40 with the side walls 44 is, in particular, solder-plated and is soldered to at least one pipe 10 during the soldering process.
FIG. 17 shows a further embodiment of the chamber side wall and of the side wall sections. Identical features are provided with the same reference symbols as in the preceding figures.
In the illustrated exemplary embodiment, in contrast to the FIGS. 15 and 16, the distance p and/or r between adjacent cutouts 84 assumes particularly small values r≧0 mm and/or p≧0 mm. In the case where r=0 mm and/or p=0 mm, two adjacent cutouts 84 in one side wall section 80, 82 form a cutout 84. In this way, the joining device, in particular the soldering device, can have a large surface. As a result, in particular, a relatively large pressure can be exerted on the pipes 10 (not illustrated) during the joining process, in particular during the soldering process. In particular, the pressure surface can be particularly advantageously enlarged, which leads to a better joint, in particular soldered connection.
FIG. 18 shows a further embodiment of the chamber side wall and of the side wall sections. Identical features are provided with the same reference symbols as in the preceding figures.
In the illustrated exemplary embodiment, in contrast to FIGS. 15, 16 and 17, four cutouts 84 are illustrated.
In another exemplary embodiment (not illustrated), the covering has more than four cutouts 84.
FIG. 19 shows a further embodiment of the chamber side wall and of the side wall sections. Identical features are provided with the same reference symbols as in the preceding figures.
In the illustrated exemplary embodiment, the case is shown where r=0 and p=0. Here, in each case two cutouts 84 form one large cutout 94.
FIG. 20 shows a further embodiment of the chamber side wall and of the side wall sections. Identical features are provided with the same reference symbols as in the preceding figures.
In the illustrated exemplary embodiment, in contrast to FIGS. 15, 16, 17, 18 and 19, cutouts 84 are not formed in the first wall section 80 and the second wall section 82. The distance k is, in particular, 2.5 mm and/or the distance l is, in particular, 2.5 mm.
In another exemplary embodiment (not illustrated) the distance k≧2.5 mm and/or the distance l≧2.5 mm.
FIG. 21 shows a further embodiment of the chamber side wall and of the side wall sections. Identical features are provided with the same reference symbols as in the preceding figures.
In the illustrated exemplary embodiment, in contrast to FIGS. 15, 16, 17, 18, 19 and 20, cutouts 84 are not formed in the first wall section 80 and the second wall section 82. A plate 93 is positioned in the opening 89 in FIG. 20. The plate 93 is in contact, in particular, with the first side wall section 80 and/or the second side wall section 82, at least in certain sections. The plate 93 is, in particular, connected in a materially joined fashion by soldering and/or welding and/or bonding to the pipes 10 (not illustrated) and/or to the first and/or second side wall sections 80, 82.
FIG. 22 and FIG. 23 show an isometric representation of a further embodiment of the connection of the lid to the bottom and to the side covering. Identical features are provided with the same reference symbols as in the preceding figures.
In contrast to the preceding figures, the lid 120, which is of essentially identical construction to the lid 12, is in contact with the bottom 140, at least in certain areas and/or is connected in a materially joined fashion to the bottom 140, in particular by welding, soldering, bonding etc.
The bottom 140 is of essentially the same construction as the bottom 14. The bottom 140 has a peripheral edge 141 at which the bottom 140 is connected to the lid 120, in particular in a materially joined fashion by soldering, welding, bonding etc. and/or in a positively locking fashion by chamfering, folding or crimping.
In addition, the lid 120 is in contact, at least in certain sections, with the covering 40, or in particular with the side wall 42 and/or the side wall 44. The lid 120 is connected in a materially joined fashion, at least in certain sections, to the covering 40, or in particular to the side wall 42 and/or to the side wall 44, in particular by welding, soldering, bonding etc. and/or in a positively locking fashion, by crimping, folding chamfering etc.
Furthermore, the lid 120 is in contact, at least in certain sections, with at least one pipe 10, at least in certain sections, and is connected, in particular in a materially joined fashion, for example by welding, soldering, bonding, to the at least one pipe 10, in particular to a plurality of pipes 10.
The covering 40, and in particular the side walls 42 and/or the side walls 44, can be embodied in the way which is illustrated in the preceding figures and described.

Claims

1. A heat exchanger, in particular charge-air cooler or exhaust gas cooler for an internal combustion engine of a motor vehicle, having a first box and a second box which is arranged spaced apart from said first box, and having a plurality of pipes by means of which the first box and the second box are fluidically connected, and having a chamber through which a coolant can flow and which is provided between the two boxes and through which a plurality of, or all of, the pipes, via which the two boxes are fluidically connected, extend, wherein at least one of said two boxes has a lid and a bottom which is connected to this lid and is provided with one or more openings for holding the pipes, wherein this bottom has at least a first groove into which the lid and a wall section of the lid of the same box extends.

2. The heat exchanger, in particular charge-air cooler or exhaust gas cooler for an internal combustion engine of a motor vehicle, having a first wall and a second box which is arranged spaced apart from said first box, and having a plurality of pipes by means of which the first box and the second box are fluidically connected, and having a chamber through which a coolant can flow and which is provided between the two boxes and through which a plurality of, or all of, the pipes, via which the two boxes are fluidically connected, extend, wherein at least one of said two boxes has a lid and a bottom which is connected to this lid and is provided with one or more openings for holding the pipes, wherein the lid or a wall section of the lid is in contact, at least in certain portions, with the bottom and a covering.

3. The heat exchanger as claimed in claim 1, wherein at least one covering, in particular covering plate, is provided for bounding the chamber, and the bottom has at least a second groove into which a wall section of the covering extends.

4. The heat exchanger as claimed in claim 1, wherein the chamber is bounded on two sides lying opposite one another by means of pipes which are embodied as flat pipes and via which the first box is fluidically connected to the second box, and the chamber is bounded on two further sides by means of a covering, in particular a covering plate, which sides are opposite one another and, in particular, are positioned transversely with respect to the planes formed by said flat pipes, and extend between the boxes.

5. The heat exchanger as claimed in claim 4, wherein the chamber is bounded by the boxes on the sides lying opposite one another in the direction of the longitudinal extent of the pipes, to be precise in particular by a bottom of the first box on one of said two sides lying opposite one another in the direction of the longitudinal extent of pipes, and by a bottom of the second box on the other of said two sides lying opposite one another in the direction of the longitudinal extent of the pipes.

6. The heat exchanger, in particular charge-air cooler for an internal combustion engine of a motor vehicle, having a first box and a second box which is arranged spaced apart from first box and having a plurality of pipes by means of which the first box and the second box are fluidically connected, wherein at least one of said two boxes has a lid and a bottom which is connected to said lid and is provided with one or more first openings for holding pipes, in particular according to claim 1, wherein this bottom has at least a first groove into which a wall section of the lid of the same box extends and/or said bottom is embodied in such a way that the lid of said box has at least a third groove into which a wall section of the bottom of this box extends.

7. The heat exchanger as claimed in claim 1, wherein the groove and/or first groove and/or the second groove is/are a peripheral groove, in particular in an edge region of the bottom, or an essentially peripheral groove.

8. The heat exchanger as claimed in claim 1, wherein the groove and/or the first groove and/or the second groove is a groove which is embossed or impressed into the bottom, said groove being in particular a peripheral or essentially peripheral groove.

9. The heat exchanger as claimed in claim 1, wherein the bottom has, on its side facing away from the lid of the same box, at least a first profile elevation, in particular a first profile elevation which runs around in the outer edge region of the bottom.

10. The heat exchanger as claimed in claim 9, wherein the first profile elevation is constructed by embossing or impressing the first groove into the bottom.

11. The heat exchanger as claimed in claim 1, wherein the first profile elevation of the bottom of the first box is spaced apart transversely, in particular perpendicularly, with respect to the direction of the longitudinal extent of the pipes, by the pipe block which is formed by the pipes, in particular flat pipes, with the result that at least a first intermediate space is formed between this pipe block and this first profile elevation transversely, in particular perpendicularly, with respect to the direction of longitudinal extent of the pipes, wherein at least one covering, in particular covering plate, is provided for bounding the chamber, and wherein a wall section of this covering extends into this first intermediate space.

12. The heat exchanger as claimed in claim 11, wherein the wall section, extending into the first intermediate space formed between the pipe block and the first profile elevation, of the covering bears essentially against said pipe block and/or against said first profile elevation.

13. The heat exchanger as claimed in claim 3, wherein the bottom has, on its side facing the lid of the same box, at least a second profile elevation, in particular a second profile elevation which runs around in the outer edge region of the bottom.

14. The heat exchanger as claimed in claim 13, wherein the second profile elevation is constructed by embossing or impressing the second groove into the bottom.

15. The heat exchanger as claimed in claim 13, wherein the second profile elevation is spaced apart transversely, in particularly perpendicularly, with respect to the direction of the longitudinal extent of the pipes, by the pipe block formed by the pipes, in particular flat pipes, with the result that at least a second intermediate space is formed between said pipe block and said second profile elevation, transversely, in particular perpendicularly with respect to the direction of the longitudinal extent of the pipes, wherein at least one covering, in particular covering plate, is provided for bounding the chamber, and wherein a wall section of the lid extends into said second intermediate space.

16. The heat exchanger as claimed in claim 15, wherein the wall section, extending into the second intermediate space formed between the pipe block and the second profile elevation, of the lid bears essentially against said pipe block and/or against said second profile elevation.

17. The heat exchanger as claimed in claim 1, wherein the bottom has one or more second openings which are different from the first opening or openings, and the lid has, on its side facing the bottom, one or more projections, in particular clips, each of which extends into or through a second opening.

18. The heat exchanger as claimed in claim 1, wherein the at least one second opening is provided in the at least one first groove, to be precise in particular in the groove base of this at least one first groove.

19. The heat exchanger as claimed in claim 1, wherein the bottom is of essentially flat or planar construction.

20. The heat exchanger as claimed in claim 1, wherein the heat exchanger is essentially composed completely of aluminum.

21. The heat exchanger as claimed in claim 1, wherein the heat exchanger has at least one cutout, in particular a plurality of cutouts.

22. The heat exchanger as claimed in claim 21, wherein the cutout has a width and a length.