EP1725823A1

EP1725823A1 - Device for exchanging heat and method for the production of said device

Info

Publication number: EP1725823A1
Application number: EP05742898A
Authority: EP
Inventors: Karl-Heinz Staffa; Eberhard Zwittig
Original assignee: Behr GmbH and Co KG
Current assignee: Mahle Behr GmbH and Co KG
Priority date: 2004-03-05
Filing date: 2005-02-24
Publication date: 2006-11-29
Also published as: WO2005085737A1; DE102004011354A1

Abstract

The invention relates to a device (10) for exchanging heat, particularly for motor vehicles, and to a method for the production of said device. The exchange matrix (100) is produced in a step involving extrusion. The inventive heat exchanger (10) is advantageous in that it allows substances to flow perpendicular to the direction of extrusion through recesses (150), which are provided in sides of the extruded component (100) which are parallel to the direction of extrusion, providing in particular cross-flow heat exchangers which are based on an extruded heat exchanger matrix (100). The invention makes it possible to simplify distributing and collecting devices (200,300), which are used with heat exchangers which are produced by extrusion, in order to distribute or collect media, which are involved in heat exchange, from a plurality of flow channels (110, 120).

Description

Heat exchange device and method of making such a device

The present invention relates to a device for exchanging heat, in particular for motor vehicles, and to a method for producing such a device.

Such devices for exchanging heat are known from the prior art. The production of such heat exchangers is generally relatively complex since a large number of parts have to be put together. Essential components of a heat exchanger - also called heat exchanger matrix - which form its core structure for heat exchange between at least two media, such as pipes, sheets and fins are mostly soldered, welded, mechanically joined or also glued. These joining processes are time-consuming and therefore expensive.

For simplification, heat exchangers and corresponding production processes are already known in the prior art, in which the exchange matrix is produced in one step by extrusion (extrusion). An extruded exchange matrix already has all structures mainly involved in heat exchange, such as flow channels and exchange walls.

Known heat exchangers of this type only allow material flows in the direction of extrusion. This is due to the preferably alternating Arrangement of the flow channels for the at least two media, between which the heat exchange takes place, that the distribution and collection devices - for distributing or collecting the media from the large number of flow channels - are relatively complex.

The invention is therefore based on the object of providing a device for exchanging heat and a method for its production which reduce the outlay for heat exchangers, in particular those produced by extrusion.

The object is achieved according to the invention by a device according to claim 1. The method according to the invention is the subject of claim 20. Preferred embodiments, further developments and uses are the subject of the subclaims.

The device according to the invention has at least one extruded component in which at least one first channel for guiding at least one first fluid medium and at least one second channel for guiding at least one second fluid medium are provided, the channels being essentially parallel to the direction of extrusion. According to the invention, at least one recess is provided at least in a side of the extruded component which is essentially parallel to the direction of extrusion, which extends at least partially transversely to the direction of extrusion and is in flow connection to at least one channel.

The device according to the invention is advantageous in that it allows extruded heat exchange matrices which are suitable for use with conventional distribution and collection devices for the media involved in the heat exchange.

In the context of the invention, an extruded component is understood to be a component which has at least partly been shaped, in particular, by extrusion, ie by extrusion. However, other shaping processes for the preferably one-piece component are also conceivable, such as casting or injection molding. The extruded component preferably has a substantially rectangular or square cross section transverse to the extrusion direction. However, it may also be preferred to choose other cross-sectional shapes which, for example, are space-savingly coordinated with the installation space available in the engine compartment of a motor vehicle. To reduce the risk of injury, the edges of the extruded component are preferably rounded.

In the context of the invention, a channel is understood to be a cavity which was produced in particular in the extruded component, preferably as part of the extrusion, and thus extends essentially parallel to the direction of extrusion, essentially over the entire length of the extruded component, through which a flowable medium flows or can flow and which is essentially gas and liquid tight against other channels or the space surrounding it.

In the context of the invention, a recess is understood to be an opening which, starting from a side surface of the extruded component which is essentially parallel to the direction of extrusion, extends inwards such that the opening is in flow communication with at least one media-carrying channel. The recesses preferably serve as flow connections from the sides of the extruded component parallel to the direction of extrusion to the channels of a medium, which in particular enable cross-flow heat exchangers based on an extruded heat exchanger matrix. The recesses particularly preferably form flow connections to the second channels.

Within the scope of the invention, a recess is understood as a recess which extends at least partially transversely to the direction of extrusion, which is in flow connection to at least one media-carrying channel and within which the main direction of flow of the medium flowing therein has at least one component perpendicular to the direction of extrusion. The main direction of flow of a medium is understood to be the direction which the medium preferably takes within a distribution and / or collecting device, a recess and / or a channel, with changes in direction of the medium which are locally limited being disregarded.

In the context of the invention, flow-related is understood to mean that a medium between the distribution and / or collection devices, recesses and channels, i.e. generally flow or flow to the media-carrying facilities. In particular, but not exclusively, a subdivision by separating devices is understood to be essentially gas and liquid tight, so that no medium can flow or flow past the respective separating device along certain directions of the recesses, the channels, the distribution and / or collecting devices or in between ,

In a preferred embodiment, the recess is in flow communication with at least one second channel.

In a further preferred embodiment, the recess has a cross-sectional profile, which is taken from a group of cross-sectional profiles, which contains round, rectangular, oval and polygonal profiles and mixed forms thereof. A plurality of recesses are preferably arranged one below the other and / or next to one another, preferably at regular intervals and particularly preferably parallel to one another.

In a further preferred embodiment, the channels have a cross-sectional profile, which is taken from a group of cross-sectional profiles, which contains round, rectangular, oval and polygonal profiles and mixed forms thereof.

In the context of the invention, the cross-sectional profile of a recess is understood to be that cross-sectional profile which results from cutting with planes which are essentially parallel to that side of the extruded one Are component, from which this recess extends into the component.

In a preferred development of the device according to the invention, the first and second channels have a different cross-sectional profile. In the context of the invention, the cross-sectional profile of a channel is understood to be that cross-sectional profile which results from cutting with planes perpendicular to the direction of extrusion.

In particular, depending on the media involved in the heat exchange, it is preferred to provide the same cross-sectional profile for the first and second channels, which can result in simplified manufacture of the heat exchanger.

In a preferred development of the device according to the invention, at least one heat exchanger wall is arranged between at least one first and at least one second channel. Within the scope of the invention, heat exchanger walls are understood to mean those walls which directly separate adjacent regions of first and second channels and which preferably extend essentially in the extrusion direction essentially over the full length of the extruded component. The heat exchanger walls preferably form separating devices with a small wall thickness that maximize the area directly adjoining the first and second channels, in order to minimize the heat transfer resistance between the first and second channels and thus achieve a maximum heat exchanger performance per unit volume of the heat exchanger.

In a preferred embodiment, the first and second channels are arranged alternately one below the other and / or next to one another, preferably at regular intervals with respect to one another.

In a further preferred embodiment, the first and second

Channels are arranged relative to one another in such a way that the volume-related exchange surface formed by the heat exchanger walls between 100 and 6000 m ² / m ³ , preferably between 300 and 4000 m ² / m ³ and particularly preferably between 500 and 2000 m ² / m ³ .

In a preferred development of the device according to the invention, the wall thickness of the heat exchanger walls is between 0.03 and 1.5 mm, preferably between 0.15 and 0.5 mm and particularly preferably between 0.3 and 0.4 mm.

In a further preferred embodiment, at least one heat transfer web is arranged in at least one channel. In the context of the invention, heat transfer webs are to be understood, in particular in contrast to heat exchanger walls, in the context of extrusion, webs arranged within a channel. Particularly in preferred embodiments, in which the first and second channels form alternating hollow-disk-like channels, elongated and essentially rectangular cross-section, within a channel type, heat transfer webs running in the narrow direction allow heat of the medium flowing therein to also escape from the central region of the channels of this type can be transferred via the next heat exchanger walls to the medium flowing in the respective other channel type.

In a preferred development of the device according to the invention, a plurality of heat transfer webs are arranged one below the other or next to one another in at least one channel, preferably at regular intervals with respect to one another.

In a preferred embodiment, the length of the extruded component is between 2 and 300 cm, preferably between 20 and 100 cm and particularly preferably between 25 and 60 cm. Preferably, the performance of the heat exchanger can be varied in a simple manner by different lengths of the extruded component, with - due to the connection profile not changing thereby - at least for the collection and distribution devices connected to the heat exchanger matrix on the end faces, ie perpendicular to the extrusion direction collecting and distribution boxes or tubes can be used. This enables, among other things, the cost-effective production of heat exchanger series.

In a further preferred embodiment, at least one collecting and / or distributing device is provided. The collecting and / or distributing devices are preferably integrated with a feed or discharge device and particularly preferably in one piece.

Depending on the design of the extruded component and on the arrangement of the collecting and / or distributing devices, the heat exchanger according to the invention is suitable for operation in the most important main circuit types of a heat exchanger, such as cross flow, counter flow, direct current, cross counter flow or cross direct current.

In embodiments according to the invention in which the heat exchanger as a whole e.g. is arranged in the air flow of an air cooler or a cooling water flow of a water cooler, e.g. if the heat exchanger is installed in the water tank of a water cooler, collecting and / or distributing devices for at least one medium can be dispensed with. In addition, further embodiments according to the invention are conceivable which do not require any collection and / or distribution devices at all, such as Air / air heat exchanger for heat recovery or condenser dryer. For this purpose, the extruded heat exchanger is installed directly in a corresponding duct system.

In a preferred development of the device according to the invention, the extruded component has at least one connection device for fastening collection and / or distribution devices.

In a further preferred embodiment, the connection device is taken from a group of connection devices which contains flanges, threaded holes, collars, beads or profile rails. In a preferred development of the device according to the invention, at least one sealing device is arranged between the collecting and / or distributing device and the extruded component.

In a preferred embodiment, the extruded component is made of a material which is taken from a group of materials which contains aluminum, ceramic or plastic.

The method according to the invention for producing such a device for exchanging heat comprises at least the following steps:

(i) producing at least one component of a device for exchanging heat by extrusion; (ii) Providing at least one recess in a side of the extruded component which is essentially parallel to the direction of extrusion, the recess at least partially extending transversely to the direction of extrusion and being in flow communication with at least one channel.

The recesses are preferably produced after the extrusion by shaping processes such as milling, laser cutting, water jet cutting or similar processes. - -

It is pointed out that not all of the advantages mentioned are necessarily achieved by all the embodiments.

Further advantages and embodiments of the present invention will become apparent from the accompanying drawings.

In it show:

Figure 1 is a perspective view of an embodiment of a device for exchanging heat according to the invention. 2a shows a perspective view of a further exemplary embodiment of a device for exchanging heat according to the invention;

2b shows a perspective view of a further exemplary embodiment;

3a shows a perspective view of a further exemplary embodiment;

Fig. 3b. a perspective view of the underside of the embodiment of Fig. 3a;

4 shows a perspective view of a further exemplary embodiment;

5 shows a perspective view of a further exemplary embodiment;

Fig. 6 is a perspective view of another embodiment.

1 shows the perspective oblique view of a device 10 for exchanging heat according to the invention.

In this exemplary embodiment, the heat exchanger 10 is assembled from five components in a substantially gas and liquid-tight manner, only three components being shown in FIG. 1 for the sake of clarity. As an extruded component according to the invention, the heat exchanger matrix 100 forms the core of the heat exchanger 10.

The arrows P1 running from the bottom left to the top right indicate directions parallel to the extrusion direction. In this extrusion direction, three first channels 110 extend within the heat exchanger matrix 100 from the full length of the front face to the rear face. - in ¬

a second channel 120 is formed between each two adjacent first channels 110, which also extends in the extrusion direction as a full length opening through the heat exchanger matrix 100. The cross-sectional profile of the first channels perpendicular to the direction of extrusion is designed in the present exemplary embodiment as an elongated, narrow rectangle with four corners angled by short 45-degree sides.

The longitudinal sides of the angled rectangular profiles run in FIG. 1 in the vertical direction and extend up to and down to narrow remaining webs over practically the full height of the heat exchanger matrix 100. In the exemplary embodiment shown, the cross-sectional profiles of the second channels 120 are also designed as elongated narrow rectangles , the longitudinal direction of which runs vertically, but which are only approximately half the width with respect to the width of the cross section of the first channels 110 and have angled corners which are widened by 45 degrees in relation to the angled corners of the first channels.

The second channels 120 extend in the vertical direction, likewise almost over the entire height of the heat exchanger matrix 100. Due to the close alternating arrangement of the first channels 110 with respect to the second channels 120, the heat exchanger matrix 100 remains between the first channels 110 and the second during the extrusion Channels 120 are only narrow, elongated heat exchanger walls 112, the longitudinal side of which also runs vertically in the exemplary embodiment in FIG. 1. The medium guided by the second channels 120 is preferably water.

In contrast to the second channels 120, the first channels 110 have heat transfer webs 111 distributed at regular intervals over the entire channel height, which transfer the heat from the inner region of the first channels 110 to the heat exchanger walls 112, and thus to the flow in the second channels 120 Lighten medium.

Two recesses 150 according to the invention are provided in the top of the heat exchanger matrix 100. These assign one to one Top parallel plane elongated rectangular cross section, the long side of which extends parallel to the extrusion direction in the perspective in FIG. 1 from bottom left to top right over most of the length of the heat exchanger matrix 100.

In the exemplary embodiment shown, one recess 150 is in flow connection to one of the two second channels 120, which allows the medium flowing in the second channels 120, as indicated by the arrows P2 running vertically from bottom to top, over the majority the heat exchanger matrix 100 to flow transversely to the direction of extrusion, and thus also transversely to the direction of flow of the medium flowing in the first flow channels 110. 1 shows a heat exchanger according to the cross-flow method.

Since the heat exchanger shown in FIG. 1 is provided for the exchange of heat between two liquid media, the perspective exploded view shows a collection and distribution device 200 and 300 for the medium flowing in the second channels 120 and in the first channels 110, respectively displayed. In the present exemplary embodiment, the collecting or distributing direction 200 ^" for the medium flowing in the second channels 120 is designed as a half pipe which runs essentially along the extrusion direction and is open to the heat exchanger matrix 100 and which is closed off at the side by a cover with a segment-like profile.

The manifold 200 has on its underside a thin frame 260a which runs all around and which essentially corresponds in length and width to the bottom of the heat exchanger matrix 100 such that when the manifold 200 with the surrounding frame 260a is placed first on the top of the heat exchanger matrix 100 is, this manifold 200 via threaded holes 105b arranged circumferentially in the top of the heat exchanger matrix 100, which with corresponding through holes 205b in the circumferential frame 260a of the manifold 200 correspond, medium (not shown threaded screws) can be screwed tight.

For fastening the header pipe 200 to the heat exchanger matrix 100, however, other suitable fastening means such as profile rails, clamps, rivets are also conceivable, or the header pipe 200 can also be soldered, welded or glued directly to the heat exchanger matrix 100. For gas and liquid-tight sealing, a sealing device, such as a sealing ring, can be provided between the heat exchanger matrix 100 and the manifold 200.

The manifold 200, assembled in this way with the heat exchanger matrix 100, can collect the medium flowing in via the recesses 150 from the second channels 120 and discharge it via the discharge device 250 which can be seen at the rear end in perspective. In the embodiment shown, this discharge device 250 is designed as a vertically extending tube, which is preferably integrated in one piece in the rear (not visible) cover of the collecting tube 200.

The analog function for collecting the medium flowing in the first channels 110 is carried out by the collecting tube 300 shown in the top right in the exploded view, in the upper side of which a likewise cylindrical tube-like discharge device 350 is integrated, the discharge device 350 moving horizontally to the right from the upper collecting pipe stretches. Similar to the header tube 200, the header tube 300 has on its underside (further in the foreground in FIG. 1) a peripheral frame 360b, preferably integrated in one piece, whose outer cross-sectional profile essentially matches the cross-sectional profile of the heat exchanger matrix 100, perpendicular to the direction of extrusion. However, it is also possible to arrange the discharge device differently on the collecting devices, such as on the circularly curved area.

The collecting tube 300 is suitable, due to the surrounding frame 360b, to be fitted flush to the rear end of the heat exchanger matrix 100 and via the widenings in the quarter-circle shape Corners of the frame 360b provided through holes 305b via fastening means (not shown), such as, for example, threaded screws, with the heat exchanger matrix 100, the corresponding threaded holes in their corners 101, which are widened analogously by quarter-circle profiles, are essentially gas and liquid-tight. In this case, a seal can also be provided (not shown) for sealing between the heat exchanger matrix 100 and the header tube 300.

In contrast to the collecting pipe 200, the collecting pipe 300 additionally has two narrow sealing webs 370 which run vertically in the peripheral frame 360b. These are designed and spaced apart from one another such that they are suitable, in particular in cooperation with a seal (not shown), after mounting the collecting tube 300 on the rear of the heat exchanger matrix 100, due to their corresponding position to the second channels 120 by covering them in the Sealing essentially gas and liquid tight. As an alternative to the sealing webs 370, the ends of the second channels 120 can also be sealed off from the header tube 300 in that the ends of the second channels 120, for example, before being joined to the header tube 300. sealed by welding, gluing or soldering.

2a shows a further exemplary embodiment of the device 10 according to the invention for exchanging heat. Here, the heat exchanger matrix 100 has a square profile perpendicular to the direction of extrusion, the corners of which are slightly rounded. In this heat exchanger matrix 100 there are four wider vertical first channels 110, each with a plurality of horizontal heat transfer webs 111 evenly distributed over the channel height, a narrower vertical second channel 120 without heat transfer webs 111 being arranged between each two adjacent first channels 110.

In this exemplary embodiment, the greater length of the heat transfer matrix 100 in the extrusion direction expresses the fact that, in the device for exchanging heat according to the invention, the heat exchanger output can be varied easily by varying the matrix length can, without having to use specially designed collection and distribution devices for the media involved in the heat exchange, since, in particular in the exemplary embodiment shown in FIG. 2a, the design of the collection box 300 for the medium flowing in the first channels 110 is based exclusively on the cross-sectional profile of the heat exchanger matrix 100 directed perpendicular to the direction of extrusion.

Furthermore, due to the greater length of the heat exchanger matrix, additional recesses 150 are provided in the upper side, which have an elongated rectangular cross-sectional profile and whose position in the horizontal direction corresponds to the horizontal position of the second ducts 120 in order to be able to use these ducts in a simple manner to be connected to the flow. A total of two groups of recesses are thus provided, three recesses each lying parallel to one another in the horizontal direction and the two recess groups being arranged uniformly along the length of the heat exchanger matrix 100.

In the heat exchanger according to the invention shown in FIG. 2a, a distributor and collector device for the medium flowing in the second channels 120 in the direction of the arrows P2 can be dispensed with, for example if a gaseous medium, such as in particular air, for heat exchange with that in the first channels 110 flowing medium, such as oil and in particular gear or power steering oil, is used.

In contrast to the exemplary embodiment shown in FIG. 1, a box-like collecting and distributing device 300 of essentially square cross-section is more suitable for collecting the medium flowing in the first channels 110, which, as already mentioned, preferably for flush connection or flush Connection with the end face 102 of the heat exchanger matrix 100 is configured. A preferably curved instead of a flat cover 310 can be used to increase the collector volume of the collecting device 300. In the present embodiment in Fig. 2a is as a feed device for the in the first Channels 110 flowing medium in the left side of the collecting device 300 preferably integrated a cylindrical tube 350.

FIG. 2b shows an embodiment which combines features of the embodiment shown in FIG. 1 with features of the heat exchanger according to the invention shown in FIG. 2a. Here, too, the heat exchanger matrix 100 is relatively long in the extrusion direction, so that two rows, each with two parallel, elongated rectangular recesses 150, are provided on the upper side as a feed to the second channels 120. Here too, as in FIG. 2a, distribution and collection devices for the medium flowing in the second channels 120 are dispensed with, that is to say a gaseous medium is preferably used for heat exchange with the medium flowing in the first three channels 110 in a cross-flow process or the heat exchanger is integrated as a whole into the liquid flow of another heat exchanger.

As a connection device in the sense of a further development of the heat exchanger device according to the invention for a collecting and distributing device for the medium flowing in the channels 110, the longitudinal edges of the heat exchanger matrix 100 are expanded by integrally integrated cylindrical rod-like profiles 101, in each case preferably threaded holes 105a are provided, one not shown To connect the collection and distribution device for the medium flowing in the first channels 110 to the heat exchanger matrix 100 in an essentially gas-tight and liquid-tight manner. In the exemplary embodiment shown in FIG. 2b, a further threaded hole 105a is provided in the middle of the end face of the heat exchanger matrix 100 in order to achieve additional pressure resistance of the connection between the collecting and distributing device and the heat exchanger matrix 100.

3a shows a further embodiment of the invention

Heat exchanger device which essentially differs in two points with respect to the exemplary embodiment shown in FIG. 2a.

Here, the heat exchanger matrix 100 is flush on the underside and parallel to the right and left side surfaces of the heat exchanger matrix 100 μm narrow side webs 103 of approximately the same height as the heat exchanger matrix 100 extended. Together with the flat collecting box floor 400, which is preferably made of sheet metal, the longitudinal edges of which are bent essentially at right angles in the direction of the side surfaces, the lid-like lower extension 330 of the collecting box 300 and a lid (not shown), which is to be provided at the rear end with a preferably integrally integrated attachment or discharge device a collecting and distributing device for the medium flowing in the second channels 120. Sealing devices are preferably provided between the heat exchanger matrix 100, the header box floor 400, the cover-like extension 330 of the header box 300 and the cover (not shown) with a feed or discharge device, or all of these devices by means of essentially gas and liquid-tight joining methods, such as soldering, Gluing or welding, bonded together.

To save installation space, e.g. Within the engine compartment of a motor vehicle, it can be sensible, as shown in FIG. 3a, to provide narrow elongated recesses 150 of rectangular profile on the upper side for the flow connection of the second channels 120 to the header box 200 only in the rear region of the heat exchanger matrix 100. Alternatively, such recesses 150 could also be in another area of the heat exchanger matrix, e.g. be provided in the central area.

The collecting box 200 as a collecting or distributing device for the medium flowing in the second channels 120 is also designed to save space, as a flat rectangular box, the length of which extends slightly beyond the length of the recesses 150 and the width of which preferably corresponds to the width of the Heat exchanger matrix 100 is matched. As shown, an adapted cylindrical tube-like feed or discharge device 250 is preferably integrated in the collecting box 200. In the present example, the feed or discharge device 250 extends horizontally to the right from the right side of the cover of the header box 200. Just like the not shown, preferably lid-like feed and discharge device for the mainly formed by the side webs 103 and the collecting box floor 400 The collecting and distributing device for the medium flowing in the second channels 120, the second collecting box to be installed correspondingly on the upper rear end, analogous to the collecting box 300 for collecting the medium flowing in the first channels 100, is not shown.

FIG. 3b shows a perspective view of the underside of the heat exchanger matrix 100 according to the exemplary embodiment in FIG. 3a. The right side web 103 has broken out around the three parallel narrow recesses which extend here on the underside over almost the full length of the heat exchanger matrix 100 To make 160 rectangular profiles visible.

4 shows an oblique perspective view of the heat exchanger matrix (100) of a further exemplary embodiment of the invention

Wärmetäuschervorrichtung. Here, the first channels (110) are formed by eight or six individual channels arranged one above the other along a vertical line of almost square cross-section. The alternating arrangement of these individual channel columns with respect to the second channels (120) corresponds to that of the first channels (110) of the previous exemplary embodiments.

Heat transfer profile inserts (113) are provided within each first individual channel (110). These are suitable, in particular in the case of heat exchanger matrices (100) with a uniform thickness of the heat transfer walls (112) which are particularly easy to produce, the resulting heat transfer resistance between the first medium in the first channels (110) and the second medium in the second channels (120) to reduce. For this purpose, the inserts have a heat-conducting contact to the heat transfer walls (112) delimiting the first channels (110).

The heat transfer profile inserts (113) preferably have star-shaped or cross-like cross sections, as shown in FIG. 4, which in particular have good heat conduction from the interior of the respective channel to the bordering heat transfer walls (112). However, other cross-sectional profile shapes of the heat transfer profile inserts (113) are also conceivable - in particular depending on the cross sections of the corresponding channels.

In the exemplary embodiment shown in FIG. 4, the second channels (120) each have a thin horizontal intermediate wall (121) substantially in the middle, which can represent a simplification in terms of production technology, for example, B. insofar as these stabilize the middle column of first individual channels (110) between the two second channels (120).

In order for the heat exchanger matrix (100) to function correctly, the intermediate walls (121) must be cleared at least in sections, in order to allow the medium flowing in the second channels (120) to pass from the lower half of the channel into the upper half of the channel.

In addition, the partition walls (121) also act as heat transfer webs (112).

A further function of the partition walls (121) is clear in FIG. 5 in a further embodiment of the heat exchanger device according to the invention shown in a perspective oblique view. This has two central continuous partition walls (121) within the second channels (120). The upper and lower half of the second channels (120) are each again crossed by two intermediate walls (121).

However, the latter each have two clearances (122, 123) spaced apart from one another in the direction of extrusion. As illustrated by the arrow chains P2 and P3, which indicate the flow paths of a second or third medium within the second channels (120), a multi-flow heat exchanger can be realized in this way. 6 shows an exemplary embodiment for the case that recesses for the first channels (110) are provided on the top of the heat exchanger matrix (100) and recesses for the second channels (120) are provided on the bottom. A possible flow path of the second medium within the second channels (120) is represented by the arrow chain pair P2. The two end faces of the heat exchanger matrix (100) are to be terminated accordingly differently in this exemplary embodiment.

Claims

Patent claims

1. Device for exchanging heat, in particular for motor vehicles, comprising: at least one component (100) extruded along a predetermined direction, in which at least one first channel (110) for guiding at least one first fluid medium and at least one second channel (12Ö) are provided for guiding at least one second flowable medium, the channels being formed essentially parallel to the direction of extrusion, characterized in that at least one recess (150 ) is provided, which extends at least partially transversely to the direction of extrusion and is in flow connection to at least one channel (110, 120).

2. Device according to claim 1,

rιπ: Λtr! t "Pl ^} M IM OI ΛOll? characterized in that the recess (150) is in flow connection with the at least one second channel (120).

3. Device, in particular according to at least one of the preceding claims, characterized in that the recess (150) has a cross-sectional profile which is taken from a group of cross-sectional profiles which contains round, rectangular, oval and polygonal profiles and mixed forms thereof.

4. Device, in particular according to at least one of the preceding claims, characterized in that a plurality of recesses (150) are arranged one below the other and / or next to one another, preferably at regular intervals and particularly preferably parallel to one another.

5. The device, in particular according to at least one of the preceding claims, characterized in that the channels (110, 120) have a cross-sectional profile which is taken from a group of cross-sectional profiles which contains round, rectangular, oval and polygonal profiles and mixed forms thereof ,

6. The device, in particular according to at least one of the preceding claims, characterized in that the first (110) and second (120) channels have a different cross-sectional profile.

7. The device, in particular according to at least one of the preceding claims, characterized in that the first (110) and second (120 channels) have the same cross-sectional profile.

8. The device, in particular according to at least one of the preceding claims, characterized in that at least one heat exchanger wall (112) is arranged between at least one first (110) and at least one second (120) channel.

9. The device, in particular according to at least one of the preceding claims, characterized in that the first (110) and second (120) channels are arranged alternately below and / or next to one another, preferably at regular intervals with respect to one another.

10. The device, in particular according to at least one of the preceding claims. characterized in that at least one heat transfer web (111) is arranged in at least one channel (110, 120).

11. The device, in particular according to at least one of the preceding claims, characterized in that at least one heat transfer profile insert (113) is arranged in at least one channel (110, 120).

12. The device, in particular according to at least one of the preceding claims, characterized in that the first (110) and second (120) channels are arranged relative to one another in such a way that through the heat exchanger walls (112), the heat transfer webs (111) and heat transfer supply profile inserts (113) formed volume-related exchange surface between 100 and 6000 m ² / m ³ , preferably between 300 and 4000 m ² / m ³ and particularly preferably between 500 and 2000 m ² / m ³ .

13. The device, in particular according to at least one of the preceding claims, characterized in that the wall thickness of the heat exchanger walls (112) between 0.03 and 1.5 mm, preferably between 0.15 and 0.5 mm and particularly preferably between 0.3 and 0.4 mm.

14. The device, in particular according to at least one of the preceding claims, characterized in that a plurality of heat transfer webs (111) are arranged one below the other or next to one another in at least one channel (110, 120), preferably at regular intervals with respect to one another.

15. The device, in particular according to at least one of the preceding claims, characterized in that the length of the extruded component (100) is between 2 and 300 cm, preferably between 20 and 100 cm and particularly preferably between 25 and 60 cm.

16. The device, in particular according to at least one of the preceding claims, characterized in that at least one collecting and / or distributing device (200, 300) is provided.

17. The device, in particular according to at least one of the preceding claims, characterized in that the extruded component (100) has at least one connecting device. device (105a, 105b) for fastening collection and / or distribution devices (200, 300).

18. The device, in particular according to at least one of the preceding claims, characterized in that the connection device (105a, 105b) is taken from a group of connection devices which contains flanges, threaded holes, collars, beads or profile rails.

19. The device, in particular according to at least one of the preceding claims, characterized in that at least one sealing device is arranged between the collecting and / or distributing device (200, 300) and the extruded component (100).

20. Device, in particular according to at least one of the preceding claims, characterized in that the extruded component (100) is made of a material which is taken from a group of materials which contains aluminum, ceramic or plastic.

21. A method for producing a device for exchanging heat, in particular for motor vehicles, comprising the steps:

- Production of at least one component (100) of a device for exchanging heat by extrusion; - Providing at least one recess (150) in a side of the extruded component which is essentially parallel to the direction of extrusion, the recess (150) extending at least partially transversely to the direction of extrusion and being in flow communication with at least one channel (110, 120);

22. Oil cooler for a motor vehicle with at least one device (10) for exchanging heat, characterized in that the oil cooler has at least one device for exchanging heat according to at least one of claims 1-20.