WO2010000311A1

WO2010000311A1 - Heat exchanger block and a method for manufacturing a heat exchanger block

Info

Publication number: WO2010000311A1
Application number: PCT/EP2008/058451
Authority: WO
Inventors: Tamacz Niepalla
Original assignee: A-Heat Allied Heat Exchange Technology Ag
Priority date: 2008-07-01
Filing date: 2008-07-01
Publication date: 2010-01-07

Abstract

The invention relates to a heat exchanger block (1) comprising a heat exchanger (2) with a plurality of microchannels (21) for exchanging heat between a heating agent (3) and a transporting fluid (4), wherein an inlet side (5) of the heat exchanger (2) has a pressure-tight fluidic connection to an inlet segment (6) and/or an outlet side (7) of the heat exchanger (2) has a pressure-tight fluidic connection to an outlet segment (8) in such a way that the heating agent (3) can be fed in the operating state at a predeterminable operating pressure (P) through the plurality of microchannels (21) of the heat exchanger (2) from the inlet segment (6) to the outlet segment (8) in order to exchange heat with the transporting fluid (4). According to the invention, a stiffening element (9) is provided on the inlet segment (6) and/or on the outlet segment (8) so that deformation of the heat exchanger block (1) owing to the operating pressure (P) of the heating agent (3) can be prevented. Furthermore, the invention relates to a method for manufacturing a heat exchanger block (1).

Description

Heat exchanger block, and a method of manufacturing a heat exchanger block

The invention relates to a heat exchanger block and to a method for producing a heat exchanger block according to the preamble of the independent claims 1 and 14.

The use of heat exchange systems is well known in a nearly intangible number of prior art applications. Heat exchangers are used in refrigerators, e.g. in ordinary

Household refrigerators used in air conditioners for buildings or in vehicles of all kinds, especially in automobiles, aircraft and ships, as water or oil coolers in internal combustion engines, as condensers or evaporators in coolant circuits and in countless other applications, all of which are well known to those skilled in the art.

As far as the different types of heat exchangers are concerned, a classification according to so-called "lamellas Heat exchangers "on the one hand, and" Minnichannel- "or" Microchannel heat exchanger "made on the other.

The laminated heat exchangers, well known for a very long time, serve, like all types of heat exchangers, to transfer heat between two media, for example, but not only, to transfer from a cooling medium to air or vice versa, as is known, for example, from a classic household refrigerator in which heat is released to the ambient air via the heat exchanger for generating a cooling capacity in the interior of the refrigerator.

The ambient medium outside the heat exchanger, e.g. Water, oil or often simply the ambient air, which absorbs heat or transfers heat to the heat exchanger, for example, is either cooled or heated accordingly. The second medium may e.g. be a liquid refrigerant or heat transfer or a vaporizing or condensing refrigerant. In any case, the surrounding medium, e.g. the air, a much lower heat transfer coefficient than the second medium, e.g. the coolant that circulates in the heat exchanger system. This is compensated by greatly different heat transfer surfaces for the two media: The medium with the high heat transfer coefficient flows in the tube, which on the outside by thin sheets (ribs, fins) has a greatly enlarged surface at which the heat transfer, for. takes place with the air.

The ratio of the outer surface to the inner surface depends on the lamella geometry (= pipe diameter, pipe arrangement and pipe spacing), as well as on the lamellar spacing d '. The lamellar spacing is chosen differently for different applications. Purely thermodynamically, however, it should be as small as possible, but not so small that the air-side pressure loss is too large. An economic optimum is about 2 mm, which is a typical value for condenser and recooler.

The efficiency is essentially determined by the fact that the heat that is transferred between the fin surface and the air, must be transmitted through heat conduction through the fins to the pipe. This heat transfer is all the more effective, the higher the conductivity or the thickness of the lamella, but also the smaller the distance between the tubes. This is called the lamella efficiency. As a lamellar material is therefore nowadays predominantly aluminum used, which has a high thermal conductivity (about 220 W / mK) to economic conditions. The pipe pitch should be as small as possible, but this leads to the problem that you need many pipes. Many pipes mean high costs because the pipes (usually made of copper) are considerably more expensive than the thin aluminum fins. This material cost could be reduced by reducing the tube diameter and wall thickness, i. You build a heat exchanger with many small pipes instead of a few big pipes. Thermodynamically, this solution would be optimal: very many tubes in close proximity with small diameters. However, a significant cost factor is also the working time for expanding and soldering the pipes. This would increase extremely with such a geometry.

Therefore, a few years ago, a new class of heat exchangers, so-called minichannel or microchannel heat exchangers, have been developed, which are manufactured according to a completely different process and almost correspond to the ideal of a laminated heat exchanger: many small tubes with small spacings.

Instead of small tubes, however, the microchannel heat exchanger uses extruded aluminum sections which have very many small channels with a diameter of, for example, about 1 mm. An arrangement of such in itself - A -

known heat exchangers, as they are also used in a heat exchanger block of the present invention, is shown schematically in Fig. 1.

In the example of Fig. 1, two known per se heat exchanger 2 in the form of extruded profiles 2 are shown schematically. The two extruded profiles 2 of Fig. 1 are preferably in thermal contact with a corrugated cooling fin 200, so that the heating means 3, which is conveyed through the microchannels 21, its heat with the Transportfluidum 201, preferably air 201, for example, with a non shown fan in the direction of the arrows 201 is transported through the heat exchanger block 1, can exchange better.

In practice, it is known to equip a heat exchanger block 1, depending on the required heat output, already with a single extruded profile 2 as a central heat exchange element. Of course, in order to achieve higher heat transfer rates, it is common to provide a plurality of extruded profiles 2 at the same time in a single heat exchanger block 1, which in suitable combinations, for example via inlets and outlets, i. via inlet segments 6 or outlet segments 8, not shown in Fig. 1, interconnected, e.g. be soldered together. This will be explained later in the explanation of the invention with reference to FIG. 5 to FIG. 13 in detail.

Such extruded profiles may e.g. be made easily and in a variety of forms from a variety of materials in suitable extrusion. However, other methods of making microchannel heat exchangers are known, such as e.g. the

Assembly of suitably shaped profile sheets or other suitable methods. These profiles can not, and you do not need to widen, as with the laminated heat exchangers, and they are not inserted into stamped plate packs. Instead, for example, between two closely spaced profiles (common distances, for example, <1 cm) explained as in Fig. 1 sheet metal strip 200, in particular aluminum sheet strips 200 placed so that by alternating juxtaposition of metal strip 200 and profile 2, a heat exchanger package is formed. This package is then completely soldered in a soldering oven.

Due to the narrow distances and the small channel diameter, a heat exchanger with a very high fin efficiency and a very small filling volume (channel inside) is created. The other advantages of this technique are the avoidance of material pairings (corrosion), the low weight (no copper), the high pressure stability (about 100 bar) and the compact design (typical depth of a heat exchanger, for example 20mm).

Microchannel heat exchangers have become established in mobile use during the 90s. The low weight, the small block depth and the limited dimensions that are required here are the ideal conditions for this. Car coolers and condensers and evaporators for car air conditioning systems are today almost exclusively realized with mini-channel heat exchangers.

In the stationary area, on the one hand, larger heat exchangers are usually needed; on the other hand, the emphasis here is less on weight and compactness than on the optimal price-performance ratio. Minichannelwärmeaustauscher were previously limited in size to be eligible. Many small modules would have to be connected consuming. In addition, the use of aluminum in the extruded profiles is relatively high, so that hardly a cost advantage was expected from the use of materials. Above all, however, the price of copper, which has risen sharply compared with aluminum, is now causing this technology to become increasingly interesting for stationary use as well.

In essence, the known heat exchanger blocks are thus composed of a plurality of individual MicroChannel heat exchangers, ie from the extruded profiles shown in Fig. 1, wherein each inlet side of the heat exchanger with an inlet segment and an outlet side of the heat exchanger with an outlet segment is pressure-resistant.

This is illustrated again for clarity in FIGS. 2 and 3, which schematically show a known heat exchanger block 1 'in the non-operating state.

It should be noted at this point that features of known devices from the prior art are provided with an apostrophe in the context of this application, while features of inventive embodiments do not carry an apostrophe.

In FIG. 2, for example, a known heat exchanger block 1 'is partially shown schematically in longitudinal section. One can only see the inlet segment 6 'of the heat exchanger block 1', in which several microchannel heat exchangers 2 'are soldered. For clarity, only two heat exchangers 2 'are shown. It is understood that all that is said below with respect to the inlet segment 6 ', completely analogous to the outlet segment or the interaction between outlet segment and heat exchanger also applies.

FIG. 3 shows a section along the section line I-I according to FIG. 2. The solder joints 13 'on which the microchannel heat exchanger 2' is soldered to the microchannels 21 'at the inlet segment 6' can be clearly seen. Typically, the inlet and outlet segments have diameters of 30-60mm, lengths of up to 4m or more, and the MicroChannel heat exchangers are typically spaced apart, for example, from 6mm to 20mm. It is understood that in individual cases, the geometric dimensions of a special heat exchanger block can also deviate significantly from the above values up or down.

However, the solder joints 13 'between the heat exchangers 2' per se and the inlet segments 6 'and the outlet segments, which are often also referred to as inlet header 6' or outlet header, or simply referred to as headers, do in the known

Heat exchanger blocks 1 'always problems. This is because the heating means 3 'in the heat exchanger block 1' under relatively high pressures P ', often in the range of 10 bar to 60 bar, or even under even higher working pressures P', the plant often a test pressure of well over 100 bar for safety reasons. Typical working values for the operating pressure are for example 42 bar. A typical test pressure for such a system can be 120 bar, for example.

These comparatively high pressures cause the headers, e.g. the inlet segment 6 'but also bend the outlet segment under the high pressure load, whereby high mechanical

Tensions arise which cause the solder joints 13 'between header and heat exchanger to be damaged, i. Get cracked or tear in the worst case.

FIG. 4 shows the heat exchanger block 1 'of FIG. 2 in the operating state. Inside the heat exchanger block 1 now prevails the high operating pressure P ', which causes the inlet segment 6' with respect to the heat exchanger 2 'bends, causing enormous stresses at the solder joints 13'. The dashed line shows the heat exchanger block 1 for comparison in the non-operating state according to FIG. 2. It can clearly be seen how much the inlet segment 6 'is bent below the operating pressure P' in comparison with the non-operating state.

It goes without saying that it must be prevented by all means that in the operating state due to the bending stresses leaks or even cracks occur at the solder joints. Even if corresponding damage to the known heat exchanger blocks 1 does not occur immediately, the maintenance and Verprüungsinterwalle must be chosen very short for safety reasons to prevent damage as possible or creeping weakening of the solder joints 13 'in time to fix.

The object of the invention is therefore to provide an improved heat exchanger block which overcomes the problems known from the prior art. This means, in particular, that a heat exchanger block should be made available in which the high operating pressures do not lead to the bending loads known from the prior art. Thus, a new heat exchanger block is to be proposed, which can be operated safely even under high operating pressure, allows long maintenance intervals and has a much longer service life than the heat exchanger blocks.

In addition, it is an object of the invention to provide a method for producing such a heat exchanger block.

The objects of the invention solving these objects are characterized by the features of independent claims 1 and 14.

The dependent claims relate to particularly advantageous embodiments of the invention. The invention thus relates to a heat exchanger block comprising a heat exchanger having a plurality of microchannels for exchanging heat between a heating medium and a transport fluid, wherein an inlet side of the heat exchanger with an inlet segment and / or an outlet side of the heat exchanger with an outlet segment such flow-tight manner, so that the heat medium in the operating state for exchanging heat with the transport fluid, can be supplied to the outlet segment under a prescribable operating pressure through the multiplicity of microchannels of the heat exchanger from the inlet segment. According to the invention, a stiffening element is provided at the inlet segment and / or at the outlet segment, so that a deformation of the heat exchanger block due to the operating pressure of the heating means can be prevented.

The stiffening element according to the invention thus prevents the header, ie the inlet segment or the outlet segment, from practically not deforming even under very high operating pressures, ie not bending at a high operating pressure as described above, as is the case with the heat exchanger blocks of the prior art is known. Thus, in a heat exchanger block according to the invention, there is no longer any fear of cracks or damage to the solder joints between the MicroChannel heat exchangers and the headers, since the solder joints are practically no longer subjected to any mechanical stresses due to the known damaging bending loads.

Thus, the inventive heat exchanger blocks are not only much safer than those known from the prior art, have a longer life and longer maintenance intervals, but in particular the headers, so the inlet and outlet segments can be easier, that is especially easier, with thinner outer walls and so with less Material expenses are constructed, because the stiffening element mechanically stabilize the header and consolidate.

Particularly preferably, the stiffening element is not connected directly to the header, ie only to the inlet segment or only to the outlet segment, not to the heat exchanger itself, so that deformation of the inlet segment and / or the outlet segment can be prevented.

Depending on the design of the heat exchanger, the inlet segment and the outlet segment can be formed by a common combination segment, which ensures both the inflow of the heat medium to the heat exchanger and the return of the heat from the heat exchanger. Such a very specific embodiment is always in question when the heat exchanger is designed so that the inflow and outflow of the heating medium takes place on one and the same side of the heat exchanger.

Preferably, but not necessarily, the inlet segment and / or the outlet segment and / or the combination segment has a substantially circular cross-section.

In a particularly important practical embodiment, the stiffening element extends substantially over an entire length of the inlet segment and / or the outlet segment and / or the combination segment.

In this case, the stiffening element with the inlet segment and / or the outlet segment and / or the combination segment is particularly preferably soldered, and in particular soldered over the entire length of the inlet segment and / or the outlet segment and / or the combination segment with these. In very special cases, it is of course also possible that the

Stiffening element is connected differently with the header, for example, with this screwed. In a specific embodiment, the stiffening element encloses the inlet segment and / or the outlet segment and / or the combination segment on the opposite side of the heat exchanger roof-shaped.

In another embodiment, the stiffening element is formed as a plank, preferably as a flat plank and extends at a predeterminable angle with respect to a surface of the heat exchanger along the inlet segment and / or the outlet segment and / or the combination segment.

In this case, a whole series of other geometric configurations of the stiffening element are possible. Thus, the stiffening element can for example also be channel-shaped formed as a groove, and / or the stiffening element may be formed as a hollow tube or as a compact rod, preferably with polygonal, round or oval cross-section.

The heat exchanger can in this case be designed and connected to the header such that an inner surface of the inlet segment and / or the outlet segment and / or the combination segment forms a substantially continuous surface with the inlet side and / or the outlet side of the heat exchanger.

It is understood that the inlet side and / or the outlet side of the heat exchanger can also be configured such that a predeterminable region of the inlet side and / or the outlet side of the heat exchanger projects into an inner flow region of the inlet segment and / or the outlet segment and / or the combination segment ,

Preferably, the heat exchanger and / or the entire

Heat exchanger block is made of a metal and / or a metal alloy, in particular of a single metal or a single Metal alloy, in particular made of stainless steel, in particular made of aluminum or an aluminum alloy, and / or is made of a metal combination, wherein preferably a sacrificial metal is provided as corrosion protection, and / or wherein the heat exchanger block at least partially with a protective layer, in particular with a Corrosion protection layer is provided.

In practice, the inventive heat exchanger block is often a cooler, a condenser or an evaporator, in particular for a mobile or stationary heating system, cooling system or air conditioning, in particular a cooler device for a machine, a data processing system or for a building or a heat exchanger block for another suitable Application.

The invention further relates to a method of manufacturing a heat exchanger block comprising a heat exchanger having a plurality of microchannels for exchanging heat between a heating medium and a transport fluid. In this case, an inlet side of the heat exchanger with an inlet segment and / or an outlet side of the heat exchanger with an outlet segment such pressure-tight flow-connected, that the heating means in the operating state for exchanging heat with the Transportfluidum, under a predetermined operating pressure through the plurality of microchannels of the heat exchanger from the inlet segment Outlet segment can be supplied. According to the invention, a stiffening element is provided at the inlet segment and / or at the outlet segment, so that deformation of the heat exchanger block due to the operating pressure of the heating means is prevented.

For the production of a heat exchanger block according to the invention, a modular system comprising the heat exchanger is preferred itself and the stiffening element provided. To produce the heat exchanger block, the individual parts of the modular system are joined together and then together pressure-resistant and fluidly connected to each other, in particular pressure-resistant soldered together.

In the following the invention will be explained in more detail with reference to the drawing. In a schematic representation:

Fig. 1 MicroChannel heat ashtray in a heat exchanger block according to the invention;

FIG. 2 shows a heat exchanger block known from the prior art in the non-operating state; FIG.

Fig. 3 is a section along the section line l-l according to Fig. 2;

FIG. 4 shows the heat exchanger block of FIG. 2 in the operating state; FIG.

Fig. 5 shows a first embodiment of an inventive

Heat exchanger block with roof-shaped stiffening element;

6 shows a second embodiment according to FIG. 5;

FIG. 7 shows a third exemplary embodiment according to FIG. 5; FIG.

FIG. 8 shows a fourth exemplary embodiment according to FIG. 5; FIG.

Fig. 9 shows an embodiment with a stepped

Stiffener; Fig. 10 shows an embodiment with a trained as a groove

Stiffener;

Fig. 1 1 shows a second embodiment according to FIG. 10;

12 shows an embodiment with a plank as stiffening element;

Fig. 13 shows another embodiment with a tube as

Stiffener;

Fig. 14 shows a first embodiment with internal

Stiffener;

FIG. 15 shows a second embodiment according to FIG. 14; FIG.

Fig. 16 shows an embodiment with a rolled

Stiffener;

Fig. 17 shows an embodiment with an inwardly directed

Bending as stiffening element.

1 to 4 have already been discussed in detail and therefore need not be considered separately in the following.

As a reminder, it should again be pointed out that the features of exemplary embodiments according to the invention are provided with reference symbols which do not carry an apostrophe, whereas the reference symbols in FIGS. 2 to 4, which show known heat exchangers, are provided with apostrophes. In Fig. 5, a first embodiment of an inventive heat exchanger block is shown with roof-shaped stiffening element in a schematic drawing. Clearly visible is the heat exchanger 2 with a plurality of microchannels 21, which is soldered at the solder joints 13 with the inlet segment 6. The roof-shaped stiffening element 9 extends substantially over the entire length of the header 6 and is also firmly soldered thereto over the entire length.

In the example of FIG. 5, the inlet side 5 of the heat exchanger 2 is designed such that the predeterminable region 22 of the inlet side 5 of the heat exchanger 2 projects into an inner flow region 12 of the inlet segment 6, as shown.

As known to those skilled in the art, this type of construction in many cases has fluidic advantages and is above all easier to produce than the embodiment shown in Fig. 6.

It should be noted that in FIGS. 5 to 13, only one representative segment 6 or one outlet segment 8 is shown. Completely analogously, another header, ie an outlet segment 8, an inlet segment 6 or a combination segment 10, could also be represented in each case.

The example of FIG. 6 differs from that of FIG. 5 only in that, instead of an inlet segment 6, an outlet segment 8 is shown by way of example and representative of the two other possible types of headers. The essential difference to the example of FIG. 5, however, is that the outlet side 7 of the heat exchanger 2 is formed semicircular so that an inner surface 11 of the Outlet segment 8 with the outlet side 7 of the heat exchanger) forms a continuous surface. Although this type of construction is somewhat more complicated than that of FIG. 5, it can, in some cases, show advantageous behavior in terms of the flow behavior, as is well known to the person skilled in the art.

Further possible roof-shaped embodiments of stiffening elements 9 according to the invention are shown with reference to FIGS. 7 and 8, which guarantee an even higher stability, so that, for example, even higher working pressures P of the heating means 3 in the operating state are possible.

The skilled person understands that all embodiments of the invention shown here stiffening elements are exemplary only and the skilled artisan easily recognizes further advantageous developments.

Fig. 9 shows an embodiment with a step-shaped stiffening element 9, wherein in addition reinforcing elements 900 are provided which fix the heat exchanger 2 even better on the header 6, 8, so that extremely high working pressures for the heating means 3 are possible.

An exemplary embodiment with a stiffening element 9 designed as a groove is shown by way of example with reference to FIGS. 10 and 11. Such an embodiment of the heat exchanger block 1 may be useful for reasons of space, for example, if therefore the available space is limited according to the representation above the heat exchanger 2. In addition, such embodiments also provide a particularly good protection against deformation or bending perpendicular to the heat exchanger 2 along the longitudinal axis of the header 6, 8, 10th Fig. 12 shows a very simple embodiment with a plank as a stiffening element, which can be made particularly simple and inexpensive.

In Fig. 13, another embodiment with four tubes 93 as a stiffening element 9 is shown schematically, which are additionally connected to each other via stiffening bridges 94 to improve the stiffening. It is understood that such stiffening bridges 94 may be absent in certain cases, because a sufficient stability is ensured even without stiffening bridges 94.

FIGS. 14 to 17 show further variants of a heat exchanger block 1 according to the invention, which are equipped with internal stiffening elements 9. Heat exchanger blocks 1 with internal stiffening elements 9 are particularly important for the practice because they require on the one hand no additional space outside the inlet, outlet or combination element 6, 8, 10. However, what is even more important is the fact that an enormous rigidity can be achieved with internal stiffening elements 9 with relatively little material expenditure, so that a heat exchanger block 1 with internal stiffening element 9 can be exposed to a particularly high operating pressure without fear of damage are.

The example of FIG. 14 is a particularly simple embodiment of a heat exchanger 1 with inner Versteilungselement 9. The stiffening element 9 as shown in FIG. 14 is simply a web 9, which substantially over the entire Läbnge on the inner wall of the inlet, Auslass- or Combination element 6, 8, 10 is provided. For example, the stiffening element is preferably soldered over the soldering track 131 over its entire length on the inner surface 11. It is understood that the stiffening element 9 is not necessary, as in FIG. 14 by way of example shown, must be arranged at an angle of 0 ° with respect to the heat exchanger 2, but may also be arranged laterally as shown in the diagram at an oblique angle with respect to the heat exchanger 2, which may be necessary, for example, under fluidic aspects, for example to the Optimize flow of the heating means 3 in the heat exchanger block 1.

In this case, the stiffening element 9 can also be made more complicated within the inlet, outlet or combination element 6, 8, 10, e.g. as shown schematically in Fig. 15 or be configured in any other suitable form.

The internal stiffening element 9 of FIG. 14 and FIG. 5 is preferably soldered via the solder joints 131 or solder traces 131 to the inner surface 11 of the inlet, outlet or combination element 6, 8, 10. However, in special cases, the stiffening element 9 may also be otherwise connected to the inlet, outlet or combination element 6, 8, 10, e.g. be connected via a weld, a screw or other known to those skilled in the type of connection.

Preferably, the inner surface 11 and / or the stiffening element 9 are provided in a conventional manner with solder material prior to assembly of the heat exchanger block, so that the entire heat exchanger block 1 can be soldered substantially completely in a single soldering. For example only the end caps on the inlet, outlet or combination elements 6, 8, 10 or other minor attachments may but need not be treated in a separate operation. In Fig. 16, an embodiment is shown with a rolled stiffening element 9 in a schematic manner. Here, the stiffening element 9 is not formed by soldering an additional component, for example by soldering an additional web, as shown in Fig. 14 or Fig. 15. Rather, in the production of the inlet, outlet or combination element 6, 8, 10, the stiffening element 9 is formed in that the stiffening element 9 is mechanically rolled into the tubular inlet, outlet or combination element 6, 8, 10. In certain exceptional cases, however, the inlet, outlet or combination element 6, 8, 10 may, for example, also be cast in the appropriate form or produced differently. It is crucial that the stiffening element 9 extends substantially over the entire length of the inlet, outlet or combination element 6, 8, 10 in the form of a dent.

In Fig. 17, finally, an embodiment with an inwardly directed fold 9 as a stiffening element 9 is schematically sketched. In this example, the stiffening element 9 is formed as a bend 9 or fold 9 on the inlet, outlet or combination element 6, 8, 10. The inlet, outlet or combination element 6, 8, 10 can be composed, for example, of two with respect to the longitudinal half-tubes, wherein on one of the half tubes, first the inflection 9 or fold 9 is formed and then the two half-tubes at the solder seam 131st for an inlet, outlet or combination element 6, 8, 10 are soldered.

The person skilled in the art knows that the exemplary embodiments described within the scope of this application are to be understood as merely exemplary. That is, the invention is not limited solely to the specific embodiments described. In particular, all suitable combinations of the specific embodiments presented are also covered by the invention.

Claims

claims

1 . A heat exchanger block comprising a heat exchanger (2) having a plurality of microchannels (21) for exchanging heat between a heating means (3) and a transport fluid (4), an inlet side (5) of the heat exchanger (2) having an inlet segment (6) and / or an outlet side (7) of the heat exchanger (2) with an outlet segment (8) is pressure-resistant flow-connected such that the heating means (3) in the operating state for exchanging heat with the Transportfluidum (4), under a predetermined operating pressure (P) the plurality of microchannels (21) of the heat exchanger (2) from

Inlet segment (6) can be fed to the outlet segment (8), characterized in that a stiffening element (9) is provided at the inlet segment (6) and / or at the outlet segment (8), so that deformation of the heat exchanger block due to the operating pressure (P) of the Warming means (3) can be prevented.

2. Heat exchanger block according to claim 1, wherein a deformation of the inlet segment (6) and / or the outlet segment (8) can be prevented.

3. The heat exchanger block according to claim 1, wherein the inlet segment and the outlet segment are formed by a common combination segment.

4. Heat exchanger block according to one of the preceding claims, wherein the inlet segment (6) and / or the outlet segment (8) and / or the combination segment (10) has a substantially circular cross-section.

5. Heat exchanger block according to one of the preceding claims, wherein the stiffening element (9) over an entire length of the Inlet segment (6) and / or the outlet segment (8) and / or the combination segment (10) extends.

6. The heat exchanger block according to claim 1, wherein the stiffening element is soldered to the inlet segment and / or the outlet segment and / or the combination segment, preferably over the entire length of the inlet segment. and / or the outlet segment (8) and / or the combination segment (10) is soldered to these.

7. Heat exchanger block according to one of the preceding claims, wherein the stiffening element (9), the inlet segment (6) and / or the

Outlet segment (8) and / or the combination segment (10) on the opposite side of the heat exchanger (2) encloses a roof shape.

8. Heat exchanger block according to one of the preceding claims, wherein the stiffening element (9) as a plank (91), preferably as a flat plank

(91) is formed and extends at a predeterminable angle (α) with respect to a surface of the heat exchanger (2) along the inlet segment (6) and / or the outlet segment (8) and / or the combination segment (10).

9. heat exchanger block according to one of the preceding claims, wherein the stiffening element (9) is formed as a channel groove (92), and / or wherein the stiffening element as a hollow tube (93) or as a compact rod (93), preferably with polygonal, round or oval cross-section is formed.

10. Heat exchanger block according to one of the preceding claims, wherein the stiffening element (9) in the interior of the inlet segment (6) and / or the outlet segment (8) and / or the combination segment (10). on an inner surface (1 1) of the inlet segment (6) and / or the outlet segment (8) and / or the combination segment (10) is provided.

1 1. Heat exchanger block according to one of the preceding claims, wherein the inlet side (5) and / or the outlet side (7) of the heat exchanger

(2) is formed such that the inner surface (1 1) of the inlet segment (6) and / or the outlet segment (8) and / or the combination segment (10) with the inlet side (5) and / or the outlet side (7) the heat exchanger (2) forms a continuous surface.

12. Heat exchanger block according to one of the preceding claims, wherein the inlet side (5) and / or the outlet side (7) of the heat exchanger (2) is designed such that a predeterminable region (22) of the inlet side (5) and / or the outlet side ( 7) of the heat exchanger (2) projects into an inner flow region (12) of the inlet segment (6) and / or the outlet segment (8) and / or the combination segment (10).

13. Heat exchanger block according to one of the preceding claims, wherein the heat exchanger (2) and / or the entire heat exchanger block is made of a metal and / or a metal alloy, in particular from a single metal or a single metal alloy, in particular stainless steel, in particular Made of aluminum or an aluminum alloy, and / or is made of a metal combination, wherein preferably a sacrificial metal is provided as corrosion protection, and / or wherein the heat exchanger block is at least partially provided with a protective layer, in particular with a corrosion protection layer.

14. Heat exchanger block according to one of the preceding claims, wherein the heat exchanger block is a cooler, a condenser or an evaporator, in particular for a mobile or stationary heating system, cooling system or air conditioning, in particular a cooler device for a machine, a data processing system or for a building.

15. A method for producing a heat exchanger block (1) comprising a heat exchanger (2) with a plurality of microchannels (21) for exchanging heat between a heating means (3) and a transport fluid (4), wherein an inlet side (5) of the heat exchanger ( 2) with an inlet segment (6) and / or an outlet side (7) of the heat exchanger (2) with an outlet segment (8) is pressure-tight flow-connected such that the heating means (3) in the operating state for exchanging heat with the Transportfluidum (4) , under a predeterminable operating pressure (P) through the plurality of microchannels (21) of the heat exchanger (2) from the inlet segment (6) the outlet segment (8) can be supplied, characterized in that at the inlet segment (6) and / or at the outlet segment ( 8) a stiffening element (9) is provided so that a deformation of the heat exchanger block (1) due to the operating pressure (P) of the

Warming means (3) is prevented.

16. The method of claim 15, wherein a modular system comprising the heat exchanger (2) and the stiffening element (9) is provided, the individual parts of the modular system are joined together and then together pressure-resistant and fluidly connected to each other, in particular soldered.