DE10150213A1 - Extruded profile, particularly for heat exchanger, is preferably of aluminum or aluminum alloy and comprises at least two tubes with equal or different geometry joined to each other by ribs - Google Patents

Abstract

The extruded profile, particularly for a heat exchanger, is preferably of aluminum or aluminum alloy and comprises at least two tubes (2,3) with equal or different inner and outer geometry joined to each other by ribs (4). The profile is of the compound type (1), the tubes of which have a flat profile cross-section, two parallel broad sides and arched or flat narrow sides. The tubes are connected to each other on their narrow sides.

Description

The invention relates to an extruded profile, in particular for Heat exchanger, preferably made of aluminum or aluminum alloy, on a Process for producing such a profile and the use of the profile in a multi-function heat exchanger. The invention further relates to a multi-function heat exchanger that has an extruded collector profile, Contains heat exchanger and / or composite profile, being in such Composite profile pipes z. B. for a condenser, water cooler or charge air cooler can be integrated.

From the German utility model G 94 06 559 is an extruded Hollow chamber profile known to be used in heat exchangers in motor vehicles Can be found. For this purpose, the hollow chamber profiles are arranged in between Slats and end elements assembled into a block that the Forms heat exchanger. Recently, several heat exchangers have been used installed in a row, causing disturbed air currents, the so-called blocking effect can occur, since in the case of one after the other arranged heat exchangers not the flat profiles or the fins in the are arranged at the same height.

An improvement here is the monoblock system from Behr, which is made of the property right DE-OS 198 24 026 is known. With this monoblock system for example, an air conditioning condenser and a water cooler in one Frame assembled and soldered together, being between each Flat profiles of the air conditioning condenser and the water cooler each have a lamella is arranged, both as a lamella for the air conditioning condenser and as Slat for the water cooler. This common lamella causes one undisturbed air flow and thus better efficiency. disadvantage This construction is also the high assembly effort due to the use of many single pipes. Furthermore, the manufacture of such a system associated with high costs. This results from the fact that in particular Not cutting the individual profiles due to the expensive machine tools can be carried out inexpensively.

The object of the invention is therefore, while maintaining the advantages of previously known solutions, the manufacturing costs for the in a multifunction Heat exchanger used pipes and thus the manufacturing costs for the reduce overall heat exchanger.

The object is achieved by the profiles according to the invention according to claim 1. The extruded profile represents on the one hand a one-piece composite profile and on the other hand a one-piece collector profile. Both profiles consist of individual tubes which are connected to one another via webs. These individual pipes are, on the one hand, cooler pipes, such as, for example, air conditioning condenser pipes, charge air cooler pipes or water cooler pipes, and on the other hand collector pipes. The tubes of the composite profile have the known flat profile cross sections and can be connected to one another via one or more webs. These pipes have several continuous channels that are separated by channel walls. Depending on the intended use of the pipes of the composite profile, the channels have different sizes, ie a different number of channel walls is provided. If the tube for the flow of refrigerant z. B. R134a or CO _{2 is} provided, ie it serves, for example, as an air conditioning condenser tube, so a relatively large number of webs must be contained in the tube, since this tube has to withstand a pressure of approximately 80 bar. In contrast, the requirement profile for water cooler pipes is very different. Here, the largest possible volume of water should be able to flow through the profile, ie only very few webs are provided in the pipe, which cause a pressure loss. However, a small number of webs is also necessary in this profile in order to stabilize the pipe. A charge air cooler pipe is particularly intended to guarantee high heat exchange. This requires the largest possible effective surface for heat exchange. In such intercooler tubes, web extensions arranged between the chamber walls in the longitudinal direction of the profile can additionally be provided.

To facilitate assembly and thus reduce manufacturing costs, you can the ends of the tubes of the composite profile are narrowed by embossing, so that insertion into the slots of the collector profiles is simplified. Furthermore becomes an equally large embossing on all profile ends Insertion depth realized in the collector pipe.

In a development of the profiles according to the invention, they are attached to their outer surfaces with a solder coating. In this case, the Slats should not be solder coated. However, it can also be the other way around solder-coated fins can be used in the heat exchanger. In this case solder coating is not required for the composite profiles.

The composite profiles and collector profiles according to the invention are by Extruded presses, with differently designed partial tubes arise. This is comparable to the well-known MMP manufacturing process. On Several 100 m of profile strand are continuously wound up in a coil. This Profile strand becomes highly efficient on a special processing machine further processed. For this purpose, the profile strand is continuously unwound, straightened and calibrated. The directed profile strand can be directly cut to length be fed, but preferably before performing the CTL Cutting a mechanical processing (e.g. milling, punching and drilling) performed. Here, for. B. grooves and cutouts in the webs brought in. The punched holes in the webs serve on the one hand Weight reduction of the composite profile. Furthermore, they reduce the Heat flow and thermal stresses between the partial pipes. on the other hand prevent moisture from building up on the webs of the finished heat exchanger can accumulate. At defined intervals, a length is created in the longitudinal direction of the webs slightly larger punched out. This punching is done on that Place provided where later the parting cut between two composite profiles is made. This punched-out recess is made by the separating cut divided in the middle, with part of the recess having a groove on the separated one Composite profile and the second, about the same size part of the recess Groove will form on the next composite profile.

If a multi-function heat exchanger consisting of charge air cooler, Water cooler and air conditioning condenser desired, so in particular preferably the composite profiles according to the invention made of intercooler tube, Water cooler pipe and condenser pipe with the invention Collector profiles are connected, the partial pipes of the composite profile in Slots of the collector pipes are inserted and between the composite profiles Slats are arranged. These slats should be advantageous also be continuous slats, d. H. all pipes of a composite profile cover at the same time.

However, it is also possible to use the composite profiles according to the invention to combine conventional collector profiles or known individual profiles, such as e.g. condenser profiles, water cooler profiles and charge air cooler Define profiles in the collector profiles according to the invention.

It is known to provide collector pipes with storage tanks. Such a storage tank can of course also be integrated in a collector profile according to the invention his. A multi-function heat exchanger can now be used with a collector profile Storage tank and a collector profile without storage tank should also be equipped with two collector profiles with storage tank.

In a special embodiment it is provided that the collector profile in each case contains only one shell of the collector tubes, with each at the shell ends Connecting means are provided to fix an inner shell. This Inner shells can preferably be made from solder-coated sheet metal be, with a series of slots for inserting the radiator tubes is.

Further advantages, features and details of the invention result from the following description, in the several with reference to the drawing Embodiments are described in detail. Show it:

Fig. 1 shows a cross section through a composite profile having two pipes,

Fig. 2 is a plan view of the composite profile according to FIG. 1,

Fig. 3 shows a cross section through a composite profile having three tubes,

Fig. 4 is a plan view of the composite profile according to FIG. 3,

Fig. 5 is a plan view of a multi-function heat exchanger,

Fig. 6 is a side view of the multi-function heat exchanger according to Fig. 5.

In Figs. 1 and 2, an inventive composite profile 1 is shown as an exemplary embodiment. This composite profile 1 consists of two tubes 2 , 3 , which are connected to one another via a web 4 . In this case, the tube 2 is a condenser tube with many channels 11 , which are separated from one another via channel walls 9 . The large number of channel walls 9 ensures that this profile can withstand high pressure. In this exemplary embodiment, the tube 3 connected to the condenser tube 2 only shows three channels 11 , which are separated by two channel walls 9 . This tube 3 serves as a water cooler tube, for example for cooling a motor vehicle engine. In contrast to the condenser pipes described above, water cooler pipes do not have to withstand high pressures. With these pipes, the main issue is a high volume throughput of the coolant water. In order to only minimally hinder the flow, as few channel walls as possible are provided in such a profile and only so much to ensure the stability of the profile and to withstand the failure of the profile in the event of pressure / pressure changes. The tubes 2 , 3 generally have different external dimensions, a height a between 0.8-10.0 mm, preferably 1.0-3.0 mm. The width b of the condenser tube is between 8-30 mm, preferably 10-25 mm. The width d of a water cooler tube 3 is generally between 8-50 mm, preferably 20-40 mm. A condenser tube 2 with a width b of 16 mm preferably has 6 to 24 channels 11 , ie the distance e between the channel walls 9 in the condenser tube 2 is between 0.2-5 mm. A water cooler tube 3 with a width d of 30 mm generally has three chambers, ie the distance f of the channel walls 9 in the water cooler tube is approximately 10 mm in this case.

The two tubes 2 , 3 have the shape of a known flat profile with two almost parallel broad sides and in this case curved narrow sides. Of course, flat narrow sides are also conceivable. The tubes 2 , 3 are connected to one another by the web 4 on their rounded narrow sides. The web 4 can have different widths, preferably 4 mm. The thickness of such a web c1 is approximately 0.5 mm. It is of course also conceivable that the two tubes 2 , 3 are connected to one another via two webs 4 . Such a case exists in particular when the tubes 2 , 3 are produced as a common hollow chamber profile by extrusion, that is to say they have common parallel broad sides which are interrupted in the desired width by punched-out portions, by a tube 2 with the width b and a Obtain tube 3 with the width d. In this way, two tubes 2 , 3 are produced from a hollow chamber profile, which are connected via two webs 4 .

In FIG. 2, the composite section 1 is to be seen in the plan view. In this case, too, the tubes 2 , 3 have different widths, comparable to FIG. 1. The outer geometry as well as the inner geometry, e.g. B. the number of channel walls 9 can be determined for each pipe 2 , 3 as desired and purpose. The web 4 connecting the two tubes 2 , 3 can be seen from FIG . This web 4 is removed at the end of the profile, so that a groove 6 is formed between the tubes 2 and 3 . The length k of this groove can be chosen arbitrarily.

The ends of the tubes 2 , 3 are inserted into header tubes 24 during assembly to the heat exchanger. For this purpose, the collector tubes 24 have correspondingly large slots 17 , as can be seen from FIG. 6. In order to simplify such insertion of the tubes into the slots 17 , 3 embossments 7 can be provided at the ends of the tubes 2 . These embossments 7 can be made on both end sides of the tube 2 or tube 3 . However, it is also sufficient to provide such an embossing only on one side, as shown in FIG. 2, wherein the embossing 7 on the tube 2 can have a shorter / greater or the same length i as the embossing 7 on the tube 3 . In the Figs. 2 and 3 of equal length embossments 7 to the tubes 2, 3, 5 have been made, for example. This embossing 7 compresses the outermost chamber of the tube 2 and the width b of the tube 2 is reduced by the dimension h, namely the width of the embossing 7 . This width of the embossing 7 is preferably 1 mm. In order to ensure a uniformly deep insertion of the tubes 2 or 3 of all composite profiles 1 of a heat exchanger, embossments 7 are provided on the tubes 2 , 3 , not only the width h but also the length i of the embossments 7 being carried out uniformly on all composite profiles 1 is, wherein the length i of the embossing 7 can be 10 mm, for example.

The embossments 7 not only serve as an assembly aid when inserted into the slots 17 of the collector tubes 24 , but also reduce the width tolerance, which enables better soldering to the collector tubes 24 .

In FIG. 3, a further embodiment is a composite profile 1 according to the invention shown '. In this case, the composite profile 1 'consists not only of an air conditioning condenser tube 2 and a water cooler tube 3 , but also of an intercooler tube 5 . The external dimensions of the charge air cooler tube 5 can deviate from the external dimensions of the tubes 2 , 3 . In the interior of the charge air cooler tubes 5 , web projections 10 extending in the longitudinal direction of the profile can be provided in addition to channel walls 9 . This increases the inner surface for heat exchange. The size of the channels 11 , ie the distance g of the chamber walls 9 , is generally greater than the distance e of the channel walls 9 in an air conditioning condenser tube 2 , but generally less than the distance f of the channel walls 9 in a water cooler tube 3rd FIG. 4 shows the composite profile 1 'from FIG. 3 in a top view. Here, too, the grooves 6 are shown at the ends of the webs 4 , which connect the tubes 2 , 3 to one another. Also shown in FIG. 4 are end embossments 7 , in this case only on the air conditioning condenser tube 2 and on the charge air cooler tube 5 .

In addition, there are several punchings 8 distributed in the longitudinal direction of the composite profile 1 'in the webs 4 . These punchings 8 can have any shape. On the one hand, they lead to a reduction in the weight of the profile, which is particularly important when used in a motor vehicle, and on the other hand, the punched out 8 reduces the heat flow and thermal stresses between the tubes 2 and 3 or 3 and 5 . Also, with such a composite profile that is installed in a heat exchanger, no condensate can accumulate on the webs, which could lead to corrosion as a result.

The composite profiles 1 , 1 'represent extruded profiles which, in this cross-sectional shape, as shown in FIGS. 1 and 3, emerge as extruded profiles from the extruder. It is now possible to coil these profile strands consisting of several partial tubes and then uncoil them in a further processing machine and process them according to the requirements, for example punching out the openings 8 and 6 , as well as separating the profile strands into the desired lengths of the composite profiles 1 or 1 '. In contrast to the previous manufacturing process for air conditioning condenser pipes, water pipes or intercooler pipes, the composite profile saves significant working time and manufacturing costs, since not every pipe 2 , 3 , 5 has to be individually coiled, cut to length and machined, but in this case only one profile, namely the composite profile 1 , 1 'is processed, that is to say that the tubes 2 , 3 , 5 are simultaneously coiled, cut to length and processed.

Another advantage can result from the fact that the tubes 2 , 3 , 5 are simultaneously coated with solder in the same way. In this case, no solder-coated fins 22 need to be used during assembly to form a heat exchanger 23 . When using solder-plated fins 22 , the solder coating can be dispensed with in the composite profile 1 , 1 '. In any case, it is prevented that, for example, a solder-plated lamella 22 has to be used, since one of the tubes 2 , 3 or 5 used has no solder coating. In the case of a composite profile 1 , 1 ', a uniform production can always be assumed and therefore unnecessary costs can be avoided.

As already mentioned, a plurality of composite profiles 1 , 1 ′ with fins 22 arranged in between are assembled to form a multi-function heat exchanger 23 . For this purpose, the composite profiles 1 , 1 'are inserted at one end into the slots 17 of a header profile 12 , a respective header tube 24 having to be present on the header profile 12 for each tube 2 , 3 , 5 . At the other end of the composite profile 1 , 1 ', a collector profile 12 is provided in the same way. As can be seen from FIG. 5, the collector profile 12 and 12 'a one-piece extrusion, which includes header pipes 24 arranged side by side and connected by webs 19. Furthermore, a storage tank 20 can be integrated into such a collector profile 12 . Fig. 5 shows on the one end of the heat exchanger, a collector profile 12 with storage tank 20 and at the other end a collector profile 12 'without storage tank. In both header profiles 12 , 12 ', the header tubes 24 consist of two shells, an outer shell 15 which is part of the composite profile 12 , 12 ' and an inner shell 16 , which is preferably formed by a sheet metal shell. In these inexpensive sheet metal shells 16 , the slots 17 are introduced, which are used to insert the tubes 2 , 3 , 5 . The connection of the shells 15 and 16 can take place, for example, by a positive connection. In FIG. 5, a way of connecting is shown. The inner shells 16 are received in longitudinal grooves 18 on the outer shells 15 .

However, the header profiles 12 , 12 'can also contain closed header tubes 24 , ie the inner shells 16 are part of the one-piece extruded header profile 12 , 12 '.

In FIG. 5, collector profiles 12, shown 12 ', where the collector pipes 24 have approximately equal cross-sections. The dimensions of the collector tubes 24 and the length of the webs 19 depend essentially on the composite profile 1 , 1 'used. In Fig. 3, for example, a composite profile 1 , 1 'is shown, where the tubes 2 and 3 have different widths and only a small dimensioned web 4 is present between these tubes 2 and 3 . Adjusted to these dimensions, the collector profile 12 , 12 'must also be produced. At low widths of the webs 4 c of the composite section 1, 1 ', it is possible that in the collector profile 12, 12' are arranged so close to each other, the collector pipes 24 so that the tube walls of adjacent tubes 24 merge into one another.

For the sake of completeness, reference is made to the connections for the coolant inflow 13 and coolant outflow 14 in relation to FIG. 6, which of course can also be arranged at other locations on the collector profile 12 , 12 '.

As already mentioned, the illustrated and previously described embodiments only represent the subject matter of the invention, for example, which is in no way limited to them. Rather, various changes and other configurations of the subject matter of the invention are possible. Reference symbol list 1 , 1 'composite profile
2 air conditioning condenser tube
3 water cooler pipe
4 bridge
5 intercooler pipe
6 groove
7 embossing
8 punching
9 channel wall
10 ridges
11 channel
12 , 12 'collector profile
13 Coolant inflow
14 Coolant discharge
15 outer shell
16 inner shell
17 slot
18 longitudinal groove on 15
19 connecting bridge
20 storage tank
21 through hole
22 slats
23 Multi-function heat exchangers
24 collector tube
a amount of 1
b width of 2
c width of 4
c1 thickness of 4
d width of 3
e distance of the chamber walls in 2
f distance of the chamber walls in 3
g distance of the chamber walls in 5
h width of 7
i length of 7
k length of 6

Claims (31)

1. Extruded profile, in particular for heat exchangers, preferably made of aluminum or aluminum alloy, characterized in that the one-piece extruded profile is constructed from at least two tubes ( 2 , 3 , 5 ; 24 ) of the same or different external and internal geometry, the two being next to each other arranged tubes ( 2 , 3 , 5 ; 24 ) are connected to one another via webs ( 4 ; 19 ). 2. Extruded profile according to claim 1, characterized in that the extruded profile is a composite profile ( 1 , 1 ') whose tubes ( 2 , 3 , 5 ) have a flat profile cross section with two parallel broad sides and curved or flat narrow sides, the side by side arranged tubes ( 2 , 3 , 5 ) of the composite profile ( 1 , 1 ') are connected to one another on their narrow sides via webs ( 4 ). 3. Extruded profile according to claim 2, characterized in that the extruded profile is a header profile ( 12 , 12 ') with header tubes ( 24 ). 4. Extruded profile according to claim 2, characterized in that the one-piece composite profile ( 1 , 1 ') is constructed from at least two tubes ( 2 , 3 , 5 ), wherein the tubes arranged next to each other are connected to each other via only one web ( 4 ) are. 5. Extruded profile according to claim 2, characterized in that the one-piece composite profile ( 1 ) is constructed from two tubes ( 2 , 3 ), the tubes ( 2 , 3 ) being connected to one another via a plurality of webs ( 4 ), which are preferably one above the other are arranged. 6. Extruded profile according to claim 2, characterized in that the tubes ( 2 , 3 , 5 ) have a plurality of continuous channels ( 11 ) forming channel walls ( 9 ). 7. Extruded profile according to claim 6, characterized in that the tube ( 2 ) is used as an air condenser tube, the channels ( 11 ) of the tube ( 2 ) through which refrigerant flows. 8. Extruded profile according to claim 7, characterized in that the air conditioning condenser tube ( 2 ) has a height a, a width b and a distance e of the chamber walls ( 9 ). 9. Extruded profile according to claim 8, characterized in that the air conditioning condenser tube ( 2 ) preferably has a height a of 1.0-3.0 mm, a width b of 10-25 mm and a distance e of 1 mm, the Distance of the first or last chamber wall to the respective narrow side of the profile can be somewhat larger. 10. Extruded profile according to claim 6, characterized in that the tube ( 3 ) is used as a water cooler tube, wherein the channels ( 11 ) of the tube ( 3 ) are flowed through by water or water-glycol mixture. 11. Extruded profile according to claim 10, characterized in that the water cooler tube ( 3 ) has a height a, a width d and a distance f of the chamber walls ( 9 ). 12. Extruded profile according to claim 11, characterized in that the water cooler tube ( 3 ) preferably has a height a of 1.0-3.0 mm, a width d of 20-40 mm and three channels ( 11 ). 13. Extruded profile according to claim 6, characterized in that the tube ( 5 ) is used as a charge air cooler tube, the channels ( 11 ) of the tube ( 5 ) through which air flows. 14. Extruded profile according to claim 13: characterized in that the charge air cooler tube ( 5 ) has a height a, a width d and a distance g from the chamber walls ( 9 ), the distance g being greater than the distance e but smaller than the distance f is. 15. Extruded profile according to claim 14, characterized in that the charge air cooler tube ( 5 ) preferably has a height a of 1.0-3.0 mm and a width d of 20-40 mm. 16. Extruded profile according to claims 1 to 15, characterized in that as a mounting aid at the ends of the tubes ( 2 , 3 , 5 ) a narrow side is embossed by a width h of preferably 0.5 mm in the direction of the profile interior and this embossing ( 7 ) has a longitudinal dimension i in the longitudinal direction of the tube ( 2 , 3 , 5 ) of preferably 10 mm. 17. Extruded profile according to one or more of claims 1 to 16, characterized in that at the ends of the composite profile ( 1 , 1 ') the webs ( 4 ) with a groove ( 6 ) and in the longitudinal direction of the composite profile ( 1 , 1 ' ) the webs ( 4 ) are provided with punchings ( 8 ). 18. Extruded profile according to claims 1 to 17, characterized in that the composite profiles ( 1 , 1 ') are provided on their outer surfaces, preferably on the broad sides of the tubes ( 2 , 3 , 5 ) with a solder coating. 19. A method for producing an extruded profile according to claim 1, characterized in that after the extrusion, the resulting profile strand is coiled and then in a further device, this profile strand is continuously unwound, straightened and calibrated, then fed to a mechanical processing and then to the desired Length of the composite profiles ( 1 , 1 ') or the collector profiles ( 12 , 12 ') cut to length. 20. The method according to claim 19, characterized in that the mechanical Processing is carried out after cutting. 21. The method according to claims 19 or 20, characterized in that the Profile strand is not coiled before further processing. 22. The method according to claim 21, characterized in that during the mechanical processing of the composite profile ( 1 , 1 ') a slot-like recess in the webs ( 4 ) is punched at fixed intervals, which is divided by cutting to length, with a part of the recess Groove ( 6 ) on the finished separated composite profile ( 1 , 1 ') forms and the second part of the recess of equal size becomes the groove ( 6 ) on the next composite profile. 23. Use of the extruded profiles according to claim 1 in a multi-function heat exchanger ( 23 ), the cooling tubes of which various media flow through. 24. Multi-function heat exchanger with extruded profiles according to claim 1, characterized in that the composite profiles ( 1 , 1 ') are arranged parallel to one another and the tubes ( 2 , 3 , 5 ) are inserted with their two ends in a collector tube ( 24 ), Here, between adjacent broad sides of the tubes ( 2 , 3 , 5 ) are attached to these fins ( 22 ), in particular by brazing with flux. 25. Multi-function heat exchanger according to claim 24, characterized in that between two stacked composite profiles ( 1 , 1 ') a continuous lamella ( 22 ) on the respective opposite broad sides of the tubes ( 2 , 3 , 5 ) of the two composite profiles ( 1 , 1 ' ) is attached. 26. Multi-function heat exchanger with extruded profiles according to claim 1, characterized in that in the header profiles ( 12 , 12 ') arranged parallel to each other with their ends inserted into a header tube ( 24 ), here are between adjacent broad sides of the individual tubes on these fins ( 22 ), in particular by brazing with flux. 27. Multi-function heat exchanger according to claim 26, characterized in that two individual tubes arranged side by side are covered by a continuous fin ( 22 ). 28. A collector profile according to claim 26, characterized in that a storage tank ( 20 ) is integrated in the collector profile ( 12 ). 29. A collector profile according to claims 26 to 28, characterized in that the collector tubes ( 24 ) are constructed from two shells and only the outer shell ( 15 ) of the collector tubes ( 24 ) are part of the one-piece collector profile ( 12 , 12 '). 30. A collector profile according to claim 29, characterized in that the inner shells ( 16 ) fixed to the outer shells ( 15 ), preferably made of solder-coated sheet metal, with a series of slots ( 17 ) for inserting the ends of the tubes ( 2 , 3 , 5 ) are provided. 31. A collector profile according to claim 30, characterized in that the outer shells ( 15 ) are equipped at their longitudinal ends with longitudinal grooves ( 18 ) for receiving and fastening the inner shells ( 16 ).