EP2628896B1 - Heat transfer arrangement - Google Patents

Heat transfer arrangement Download PDF

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Publication number
EP2628896B1
EP2628896B1 EP13155041.0A EP13155041A EP2628896B1 EP 2628896 B1 EP2628896 B1 EP 2628896B1 EP 13155041 A EP13155041 A EP 13155041A EP 2628896 B1 EP2628896 B1 EP 2628896B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
fluid
box
tubes
core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP13155041.0A
Other languages
German (de)
French (fr)
Other versions
EP2628896A3 (en
EP2628896A2 (en
Inventor
Matthias Dipl.-Ing. Fehrenbach (FH)
Mark Dipl.-Ing. Schienemann (FH)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Behr GmbH and Co KG
Original Assignee
Mahle Behr GmbH and Co KG
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Filing date
Publication date
Application filed by Mahle Behr GmbH and Co KG filed Critical Mahle Behr GmbH and Co KG
Publication of EP2628896A2 publication Critical patent/EP2628896A2/en
Publication of EP2628896A3 publication Critical patent/EP2628896A3/en
Application granted granted Critical
Publication of EP2628896B1 publication Critical patent/EP2628896B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0234—Header boxes; End plates having a second heat exchanger disposed there within, e.g. oil cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F28D7/0083—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids with units having particular arrangement relative to a supplementary heat exchange medium, e.g. with interleaved units or with adjacent units arranged in common flow of supplementary heat exchange medium
    • F28D7/0091—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids with units having particular arrangement relative to a supplementary heat exchange medium, e.g. with interleaved units or with adjacent units arranged in common flow of supplementary heat exchange medium the supplementary medium flowing in series through the units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0082—Charged air coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • F28F2280/06—Adapter frames, e.g. for mounting heat exchanger cores on other structure and for allowing fluidic connections

Definitions

  • the invention relates to a heat exchanger arrangement, in particular for charge air cooling, with a first heat exchanger and a second heat exchanger, which are flowed through by a first fluid to be cooled such that the first heat exchanger is arranged in the flow direction of the first fluid before the second heat exchanger.
  • intercooling is essential in order to achieve high engine performance.
  • intercoolers are as heat exchangers in motor vehicles in application, which in the past mainly air-cooled charge air cooler in the cooling module in the vehicle front were used.
  • the proportion of coolant-cooled charge air coolers is increasing, which has the advantage that the coolant-cooled charge air cooler no longer has to be arranged in the cooling module, but can also be arranged flanged to another location in the engine compartment, for example directly flanged to the engine.
  • the coolant-cooled intercoolers have the disadvantage over the air-cooled intercoolers that the coolant usually has a higher temperature than the air for the air-cooled intercooler, so that the temperature drop in coolant-cooled intercoolers is usually lower than in air-cooled intercoolers.
  • EP 2 412 950 A1 EP 0 289 406 A1 .
  • EP 2 161 429 A2 and DE 10 2006 032 205 A1 known.
  • a heat exchanger arrangement is provided, in particular for charge air cooling, with a first heat exchanger and a second heat exchanger, which are flowed through by a first fluid to be cooled such that the first heat exchanger is arranged in the flow direction of the first fluid before the second heat exchanger, wherein the first heat exchanger is traversed by a first cooling fluid and the second heat exchanger is flowed through by a second cooling fluid, such that the first heat exchanger cools the first fluid to a first temperature and the second heat exchanger cools the first fluid from the first temperature to a second temperature, the lower as the first temperature, wherein the first and the second heat exchanger are formed as a structural unit.
  • the first heat exchanger has an inlet box and an outlet box for the first fluid and a heat transfer core arranged therebetween, wherein the second heat exchanger is arranged in the outlet box of the first heat exchanger or downstream of the outlet box of the first heat exchanger.
  • the second heat exchanger has an inlet box and an outlet box for the first fluid and a heat transfer core arranged therebetween, wherein the first heat exchanger in the inlet box of the second Heat exchanger arranged or upstream of the inlet box of the second heat exchanger.
  • first heat exchanger has an inlet box and a first heat exchanger core and the second heat exchanger has a second heat exchanger core and an outlet box for the first fluid, wherein the two heat exchanger cores are accommodated in a common housing or each have their own housing or into one Housing are received and / or connected to each other by means of a connecting element.
  • the first and / or the second heat transfer core is a shell and tube heat transfer core with a bundle of tubes through which the first fluid can be taken, which are received at their ends in openings of a tube plate, the tubes of the first and second cooling fluid can flow around.
  • the inlet box of the second heat exchanger and / or the outlet box of the first heat exchanger has an opening in which the first or the second heat exchanger is introduced.
  • the first and / or the second heat transfer core is a Rohrbündelianoschreibtragerkern or Scheibentownübertragerkern, with a bundle or stack of pipes or disks, wherein the tubes or disks are flowed around by the first fluid and wherein the tubes or disks of the first or second cooling fluid can be flowed through.
  • the inlet box of the second heat exchanger and / or the outlet box of the first heat exchanger has an opening in which the first or the second heat exchanger is introduced.
  • the heat exchanger introduced into the opening has on one side a collecting box which at least partially protrudes from the opening and has at least one connection for a cooling fluid.
  • outlet box of the first or the second heat exchanger is a distributor strip of the cylinder head or can be connected to such.
  • FIG. 1 shows a heat exchanger assembly 1 with a first heat exchanger 2 and a second heat exchanger 3, which are flowed through by a first fluid to be cooled 4, such as charge air.
  • a first fluid to be cooled 4 such as charge air.
  • the arrows 5 and 6 are used, which characterize the inflow of the fluid 4 into the inlet box 7 of the first heat exchanger, and the outflow of the first fluid 4 from the outlet box 8 of the first heat exchanger.
  • the first heat exchanger 2 is thus formed by an inlet box 7 and an outlet box 8, wherein between the inlet box 7 and the outlet box 8, a heat transfer core 9 is arranged, which is flowed through by the first fluid 4.
  • the first heat transfer core 9 is designed as a tube bundle heat transfer core, in which a plurality of tubes 10 in tube sheets 11 and 12 are arranged end and fluid-tight, so that the inflowing fluid 4 can flow from the inlet box 7 inside through the tubes 10 to the outlet box 8, while the tubes in the tube bundle are received in a housing 13 and can be flowed around by a cooling fluid.
  • the housing 13 has an inlet connection 14 and an outlet connection 15, so that the cooling fluid 16 can flow into the inlet connection 14 according to the arrow 17, can flow around the tubes 10 and can then flow out of the outlet connection 15, see arrow 18.
  • the first heat transfer core 9 cools the inflowing first fluid 4 from an inlet temperature to a first temperature at which the fluid enters the outlet box 8.
  • the second heat exchanger 3 is arranged in the outlet box 8, so that substantially all of the flow of the first fluid 4 from the first heat exchanger core thereafter flows through the second heat exchanger core 19 of the second heat exchanger 3 before it can exit the outlet box 8.
  • the first fluid 4 flows according to the arrow 20 through the first heat exchanger 2, wherein the cooling fluid according to arrow 21 flows in the opposite direction, so that there is a counter-current arrangement.
  • the second heat exchanger 3 is arranged transversely to the flow direction 20 of the first fluid, so that the first fluid can flow through the heat exchanger in its full width perpendicular to the flow direction of the fluid 22.
  • the second cooling fluid 23 flows through the inlet port 24 in the heat exchanger 3, flows through the heat exchanger according to arrow 22 transversely to the flow direction 20 of the first fluid is deflected in the collection box 25, for example, U-shaped and flows thereafter according to arrow 26 back to the collection box 27 back, from where it can flow out of the heat exchanger 3 again.
  • the heat exchanger 3 is seated with a flange 28 in an opening 29 of the outlet box 8 and serves to cool the fluid from a first temperature, with which it leaves the first heat exchanger, to a second temperature which is below the first temperature ,
  • Suction tube 50 shown includes an inlet box 51.
  • This can be formed as a plastic injection molded part. Alternatively, it may also be formed as a metal part.
  • the inlet box 51 tapers in cross-section in a width direction B of the suction pipe 50.
  • an inlet port 52 for supplying a first fluid, such as charge air, is provided, such as flanged.
  • the feed is indicated by the arrow 53.
  • the inlet box 51 essentially fulfills the function of an inlet side
  • the heat exchanger 54 is flowed through in a direction according to arrow 55 of the first fluid, wherein heat of the fluid is delivered to a first cooling fluid in the form of a liquid coolant.
  • a motor flange 56 On the outlet side of the heat exchanger 54 through which the first fluid flows, a motor flange 56 is arranged, which can be flanged directly to a cylinder head (not shown) of an internal combustion engine. In the present case, the fixing takes place by means of sealing surfaces 57 and fastening bores 58.
  • the passage cross-section of the motor flange 56 widens in the flow direction of the first fluid from the outlet of the heat exchanger 54 to the connection plane of the cylinder head.
  • the flange 56 is the outlet box of the heat exchanger, which can then direct the first fluid directly into the cylinder head of the engine.
  • the heat exchanger is formed by the inlet box 51, the outlet box 56 and the heat transfer core 59, which is arranged between the two boxes 51, 56.
  • the heat transfer core 59 is connected by means of a flange 60, 61 with the inlet box 51 and outlet box 56.
  • the heat transfer core 59 is flowed through by a first cooling fluid, which flows through the port 62, flows through the core 59 and flows out again at the port 63.
  • the first cooling fluid flows in countercurrent according to arrow 64 to the flow direction 55 of the first fluid.
  • the motor flange 56 is presently formed as an aluminum die cast part. But it can also be formed as a plastic part. It comprises at a lateral region a connection member 65 for a high pressure exhaust gas recirculation, which is also optional and may be omitted.
  • the heat transfer core 70 is in Fig. 3 as well as in the exploded illustration Fig. 4 shown in detail. It comprises a plurality of tubes 71 stacked in the width direction B and formed as flat tubes.
  • the broad sides of the flat tubes extend in the vertical direction H and depth direction T.
  • the narrow sides of the flat tubes extend in the vertical direction H and width direction B.
  • turbulence inserts or ribs which are each arranged between the broad sides of adjacent flat tubes 71. These can also be soldered flat with the pipes.
  • the flat tubes 5 are presently formed as folded from sheets and welded or extruded flat tubes. Alternatively, they can also be designed as extruded profiles. Depending on requirements, the flat tubes 71 can have indentations inwards and / or outwards in order to generate turbulence and / or to ensure a defined spacing of adjacent flat tubes during assembly. The interior of the flat tubes 71 may alternatively or in addition to such forms be provided with turbulence inserts or fin sheets.
  • the flat tubes 71 open at the ends in openings 72 with or without passages of a tube plate 73.
  • the tube plates 73 are produced as sheet metal parts from an aluminum sheet.
  • On the inlet side and outlet side bottom 73 are advantageously identical, whereby the number of different components is reduced.
  • the stack of flat tubes 71 is surrounded by a water jacket 74, which has a first water jacket part 75 and a second water jacket part 76.
  • the water jacket 74 also forms part of the housing of the suction pipe according to the invention, which is formed overall by the inlet section 51, the water jacket 74 and the motor flange 56.
  • Both water jacket parts 75, 76 each have a base 77, 78 with two end, angled legs 79.
  • the base 77, 78 extends in each case along the width direction B transverse to the flow direction of the first fluid, such as the charge air, and is flat with the narrow sides the exchanger tubes 71 soldered.
  • the legs 79 each cover a portion of a broad side of each outer flat tube 71 of the stack and are soldered flat with this broadside.
  • the water jacket has two bases 77, 78 and two end side portions 79 formed separately from the base.
  • both the base and the side parts are substantially flat and form the four sides of a square or box.
  • the base 77, 78 extends in each case along the width direction B transversely to the flow direction of the first fluid, such as the charge air, and is soldered flat with the narrow sides of the exchanger tubes 71.
  • the side parts 79 cover the broad side of the respective outer flat tube 71 of the stack and are soldered flat with this broad side.
  • the lateral limb can also be full-surface and be spaced from the lateral flat tubes, so that a housing forms, which can be flowed through completely and thus also the outer flat tubes can be flowed around.
  • the water jacket parts 75, 76 each have, in the region of their bases 77, 78, elongated bulges 81 extending in the width direction B, which function as collectors for the liquid first cooling fluid flowing around the flat tubes 71.
  • For supply and discharge of the cooling fluid are on the bulges 81 of a water jacket part ports 82, 83 are provided.
  • the bulges 81 on the second water jacket part shown below, improve the distribution of the cooling fluid, which flows essentially in the vertical direction H opposite to the flow direction of the first fluid charge air along the broad sides of the flat tubes 71, that flows in the counterflow direction with respect to the first fluid.
  • the ports may also be provided on different sides of the water jacket.
  • the tubesheets 73 are mechanically preassembled or cassetted together with the flat tubes 71 and the water jacket parts 75, 76 and soldered in a brazing oven to form a heat exchanger block.
  • suitable surfaces of the individual components are plated with solder.
  • the floors have edges that are 90 ° angled, which are advantageously provided with corrugated slots.
  • FIGS. 5, 6 . 7 and 8 show schematic embodiments of heat exchangers, which can be used as first or second heat exchanger, and which can be arranged in an inlet and outlet box.
  • the heat exchangers 101, 102, 103 each have a heat transfer core 104, 105, 106 and a first collection box 107, 108, 109 and a deflection box 110, 111, 112, wherein the one collecting box 107, 108, 109 and the deflection box 110th , 111, 112 are respectively disposed at opposite ends of the heat exchanger core.
  • the collecting box 107, 108, 109 respectively has an inlet port 113 and an outlet port 114, so that a first or second cooling fluid can flow through the inlet port into the collecting box, through which the heat exchanger core can flow in order to be deflected in the deflection box, in order subsequently to flow through the heat exchanger core again to flow back into the collecting box, which is advantageously separated by a partition, to flow out through the outlet port 114 again from the heat exchanger.
  • a flange 115 is provided, which serves that the heat exchanger in an opening in a housing, such as an inlet box or an outlet box, can be arranged and sealed sealed.
  • a heat transfer core according to the FIGS. 5 to 8 is advantageously designed as a radiator block with tubes and ribs, wherein the tubes are fluid-tightly fitted and connected to the manifolds through openings in a tube sheet and a coolant flows through the interior of the tubes, wherein between the tubes advantageous ribs or turbulence liners are arranged so that transversely to the flow direction of the fluid through the tubes can flow through a first fluid, or can flow around the tubes of the radiator block to flow through the heat exchanger.
  • FIGS. 6 . 7 and 8 show embodiments of a heat exchanger in which the collecting box is arranged with the flange plate at a lateral small end of the heat exchanger core
  • the embodiment of the FIG. 5 an embodiment is, in which the collecting box is arranged with the flange plate at a lateral larger end portion of the heat exchanger core.
  • the Gland plate arranged substantially in a plane parallel to a plane of the tubes
  • the flange plate is arranged substantially in a plane which is aligned perpendicular to the plane of the flat tubes.
  • a heat exchanger according to the FIGS. 5 to 8 can thus easily into an opening of an inlet or outlet box according to the FIG. 1 be integrated, so that the heat exchanger can form the second heat exchanger in the outlet of the first heat exchanger.
  • FIG. 9 shows a further non-inventive embodiment of a heat exchanger assembly 200, in which two heat exchanger cores 201 and 202 are accommodated in a housing 203.
  • the FIGS. 10 and 11 show this heat exchanger arrangement again in a perspective view from the outside, or a heat transfer core with tubes and tube sheets.
  • FIG. 11 shows the heat exchanger core 201 as an array of tubes 204 which are received in tube plates 205, 206 in openings, wherein between the tubes 204 each turbulence inserts 207 are arranged, which are flowed through by a flowing around the tubes coolant.
  • FIG. 12 shows a non-inventive heat exchanger assembly, which consists of substantially two heat exchanger cores substantially corresponding to Figures 3 or 4 or this heat exchanger cores similar is formed.
  • a first heat transfer core 301 is arranged between an inlet box 302 and an intermediate element 303, wherein the second heat transfer core 304 is arranged between the intermediate element 303 and the outlet box 305.
  • the first fluid to be cooled flows according to arrow 306 through the inlet connection flange or through the inlet connecting piece 307 into the inlet box 302. Subsequently it flows through the heat transfer core 301. From there it flows into the intermediate element 303, which serves as a coupling element. From there, the first fluid flows through the second heat exchanger core 304 and then through the outlet box 305 and the corresponding connecting piece 308 according to arrow 309 again.
  • the heat exchanger cores have a housing with a corresponding cover 310, 311, wherein connecting pieces 312, 313, 314 and 315 are provided, for the inflow or outflow of a first cooling fluid for the first heat transfer core 301 and for a second cooling fluid for the second heat transfer core 304 ,
  • the tubesheets 316, 317, 318, 319 are respectively arranged on both sides of the heat exchanger core 301 or 304 and serve the connection between the heat exchanger core and the inlet box 302 and the outlet box 305 and with the intermediate element 303.
  • the connection is advantageous via a corrugated slot flange.
  • tubes 204 may further not shown charge air side ribs may be arranged.
  • the inlet box 208 is formed as a funnel-shaped element with a pipe connection piece 209.
  • the outlet box 210 is schematically formed as an opening box, which is connectable to a cylinder head of the engine.
  • the housing parts 203 of the individual heat exchanger cores are connected to one another at the interface, advantageously formed integrally with one another. It may be particularly advantageous if the housing or the housing 203 is made in one piece from plastic.
  • the housing structure may be formed substantially rectangular, wherein on the surface of a rib-like design may be formed to improve the strength.
  • connecting stubs 211, 212, 213 and 214 can be seen, which serve to admit and discharge a first cooling fluid and a second cooling fluid into the first heat exchanger core and into the second heat exchanger core, respectively.
  • the first cooling fluid is introduced into the inlet 212, flows through the heat exchanger core and flows around the tubes 204 arranged there and is discharged from the heat exchanger core at the outlet 211 again.
  • the second cooling fluid is introduced into the second heat exchanger core, it also flows through the heat exchanger core and flows around the tubes 204 arranged there, before it leaves the heat exchanger core again at the outlet connection 213.
  • the two heat exchanger cores are thus flowed through in countercurrent in comparison to the flow direction of the first fluid, such as the charge air.
  • the heat exchanger assembly is surrounded by a housing 203 as a plastic jacket.
  • the housing can be made of plastic or alternatively of metal, such as aluminum.
  • the two cooling fluids are separated via the seal 215 between the middle floors 216, 217 with the housing 203, so that there can be no mixing of the circuits.
  • the two tube bundles of heat exchanger cores can also be welded directly to each other or via a mechanical connection, such as crimping or screws or gluing over a plastic or aluminum intermediate element as Coupling element to be connected.
  • An intermediate element which is sealed by elastomer seals on both floors, has the advantage that this as a decoupling element thermoelectric and Can reduce vibration stresses that can occur between the two components.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

Technisches GebietTechnical area

Die Erfindung betrifft eine Wärmeübertrageranordnung, insbesondere zur Ladeluftkühlung, mit einem ersten Wärmeübertrager und einem zweiten Wärmeübertrager, die von einem zu kühlenden ersten Fluid derart durchströmt werden, dass der erste Wärmeübertrager in Strömungsrichtung des ersten Fluids vor dem zweiten Wärmeübertrager angeordnet ist.The invention relates to a heat exchanger arrangement, in particular for charge air cooling, with a first heat exchanger and a second heat exchanger, which are flowed through by a first fluid to be cooled such that the first heat exchanger is arranged in the flow direction of the first fluid before the second heat exchanger.

Stand der TechnikState of the art

Bei Kraftfahrzeugen mit aufgeladenen Motoren ist die Ladeluftkühlung wesentlich, um eine hohe Motorleistung erreichen zu können. Dazu sind Ladeluftkühler als Wärmeübertrager in Kraftfahrzeugen in Anwendung, wobei in der Vergangenheit vorwiegend luftgekühlte Ladeluftkühler im Kühlmodul in der Fahrzeugfront eingesetzt wurden. In jüngster Zeit nimmt der Anteil an kühlmittelgekühlten Ladeluftkühlern zu, was den Vorteil hat, dass der kühlmittelgekühlte Ladeluftkühler nicht mehr im Kühlmodul angeordnet sein muss, sondern auch an anderer Stelle im Motorraum beispielsweise direkt am Motor angeflanscht angeordnet werden kann.In motor vehicles with turbocharged engines intercooling is essential in order to achieve high engine performance. For this intercoolers are as heat exchangers in motor vehicles in application, which in the past mainly air-cooled charge air cooler in the cooling module in the vehicle front were used. Recently, the proportion of coolant-cooled charge air coolers is increasing, which has the advantage that the coolant-cooled charge air cooler no longer has to be arranged in the cooling module, but can also be arranged flanged to another location in the engine compartment, for example directly flanged to the engine.

Die kühlmittelgekühlten Ladeluftkühler haben jedoch gegenüber den luftgekühlten Ladeluftkühlern den Nachteil, dass das Kühlmittel üblicherweise eine höhere Temperatur aufweist als die Luft für die luftgekühlten Ladeluftkühler, so dass die Temperaturabsenkung in kühlmittelgekühlten Ladeluftkühlern meist geringer ist, als bei luftgekühlten Ladeluftkühlern.However, the coolant-cooled intercoolers have the disadvantage over the air-cooled intercoolers that the coolant usually has a higher temperature than the air for the air-cooled intercooler, so that the temperature drop in coolant-cooled intercoolers is usually lower than in air-cooled intercoolers.

Darüber hinaus ist auch die Anforderung hinsichtlich der Ladeluftkühlung in letzter Zeit immer mehr gestiegen, weil auf Grund der immer stärkeren Aufladung der Motoren auch die Ladelufttemperaturen immer stärker zunehmen, so dass eine höhere Kühlleistung notwendig wird, um die Ladeluft auf niedrigere Temperaturen abzukühlen.In addition, the demand for intercooler lately increased more and more, because due to the increasing charge of the engines and the charge air temperatures increase more and more, so that a higher cooling capacity is necessary to cool the charge air to lower temperatures.

Darüber hinaus sind die Anforderungen an den Druckverlust der Ladeluft im Ladeluftkühler sowie die immer steigenden Anforderungen an reduzierte Bauräume weiterhin gegeben, so dass auch dies für die Erreichung der immer weiter steigenden Kühlleistungen nachteilig ist.In addition, the requirements for the pressure loss of the charge air in the intercooler and the ever increasing demands for reduced space are still given, so that this is disadvantageous for the achievement of ever-increasing cooling performance.

Auch sind durch die DE 41 14 704 C1 Ladeluftkühler in zwei Stufen bekannt geworden, bei der ein Hochtemperatur- und ein Niedertemperaturkreislauf zur Abkühlung der Luft in zwei Stufen vorgesehen ist.Also are by the DE 41 14 704 C1 Intercooler in two stages has become known, in which a high-temperature and a low-temperature circuit for cooling the air is provided in two stages.

Die Anordnung zweistufiger Ladeluftkühler führt jedoch zu dem Problem, dass bei einer Anordnung von mehreren Wärmetauschern bei gleichzeitiger Durchströmung unterschiedlich temperierter Kühlfluide hohe Spannungen auf Grund von thermischer Ausdehnung entstehen, die auf Grund der sich häufig ändernden thermischen Belastungen zu unkontrollierten Schädigungen der Wärmeübertrager führen können.However, the arrangement of two-stage intercooler leads to the problem that in an arrangement of several heat exchangers with simultaneous flow of different tempered cooling fluids high voltages due to thermal expansion arise, which can lead to uncontrolled damage to the heat exchanger due to the frequently changing thermal loads.

Weitere Wärmeübertrageranordnungen sind aus EP 2 412 950 A1 , EP 0 289 406 A1 , EP 2 161 429 A2 und DE 10 2006 032 205 A1 bekannt.Further heat exchanger arrangements are made EP 2 412 950 A1 . EP 0 289 406 A1 . EP 2 161 429 A2 and DE 10 2006 032 205 A1 known.

Darstellung der Erfindung, Aufgabe, Lösung, VorteilePresentation of the invention, object, solution, advantages

Es ist die Aufgabe der Erfindung, eine Wärmeübertrageranordnung nach dem Oberbegriff von Anspruch 1 zu schaffen, welche hinsichtlich Dauerfestigkeit, Bauraumbedarf und Druckabfall gegenüber dem Stand der Technik verbessert ist.It is the object of the invention to provide a heat exchanger assembly according to the preamble of claim 1, which is improved in terms of fatigue strength, space requirements and pressure drop over the prior art.

Dies wird erreicht mit den Merkmalen von Anspruch 1.This is achieved with the features of claim 1.

Dabei wird eine Wärmeübertrageranordnung geschaffen, insbesondere zur Ladeluftkühlung, mit einem ersten Wärmeübertrager und einem zweiten Wärmeübertrager, die von einem zu kühlenden ersten Fluid derart durchströmt werden, dass der erste Wärmeübertrager in Strömungsrichtung des ersten Fluids vor dem zweiten Wärmeübertrager angeordnet ist, wobei der erste Wärmeübertrager von einem ersten Kühlfluid durchströmt wird und der zweite Wärmeübertrager von einem zweiten Kühlfluid durchströmt wird, derart, dass der erste Wärmeübertrager das erste Fluid auf eine erste Temperatur kühlt und der zweite Wärmeübertrager das erste Fluid von der ersten Temperatur auf eine zweite Temperatur kühlt, die geringer als die erste Temperatur ist, wobei der erste und der zweite Wärmeübertrager als eine Baueinheit ausgebildet sind.In this case, a heat exchanger arrangement is provided, in particular for charge air cooling, with a first heat exchanger and a second heat exchanger, which are flowed through by a first fluid to be cooled such that the first heat exchanger is arranged in the flow direction of the first fluid before the second heat exchanger, wherein the first heat exchanger is traversed by a first cooling fluid and the second heat exchanger is flowed through by a second cooling fluid, such that the first heat exchanger cools the first fluid to a first temperature and the second heat exchanger cools the first fluid from the first temperature to a second temperature, the lower as the first temperature, wherein the first and the second heat exchanger are formed as a structural unit.

Dabei ist es vorteilhaft, wenn der erste Wärmeübertrager einen Einlasskasten und einen Auslasskasten für das erste Fluid und einen dazwischen angeordneten Wärmeübertragerkern aufweist, wobei der zweite Wärmeübertrager im Auslasskasten des ersten Wärmeübertragers angeordnet oder dem Auslasskasten des ersten Wärmeübertragers nachgeordnet ist.It is advantageous if the first heat exchanger has an inlet box and an outlet box for the first fluid and a heat transfer core arranged therebetween, wherein the second heat exchanger is arranged in the outlet box of the first heat exchanger or downstream of the outlet box of the first heat exchanger.

Bei einem anderen Ausführungsbeispiel ist es zweckmäßig, wenn der zweite Wärmeübertrager einen Einlasskasten und einen Auslasskasten für das erste Fluid und einen dazwischen angeordneten Wärmeübertragerkern aufweist, wobei der erste Wärmeübertrager im Einlasskasten des zweiten Wärmeübertragers angeordnet oder dem Einlasskasten des zweiten Wärmeübertragers vorgeschaltet ist.In another embodiment, it is expedient if the second heat exchanger has an inlet box and an outlet box for the first fluid and a heat transfer core arranged therebetween, wherein the first heat exchanger in the inlet box of the second Heat exchanger arranged or upstream of the inlet box of the second heat exchanger.

Auch ist es zweckmäßig, wenn der erste Wärmeübertrager einen Einlasskasten und einen ersten Wärmeübertragerkern und der zweite Wärmeübertrager einen zweiten Wärmeübertragerkern und einen Auslasskasten für das erste Fluid aufweisen, wobei die beiden Wärmeübertragerkerne in einem gemeinsamen Gehäuse aufgenommen sind oder jeweils ein eigenes Gehäuse aufweisen oder in ein Gehäuse aufgenommen sind und/oder mittels eines Verbindungselements miteinander verbunden sind.It is also expedient if the first heat exchanger has an inlet box and a first heat exchanger core and the second heat exchanger has a second heat exchanger core and an outlet box for the first fluid, wherein the two heat exchanger cores are accommodated in a common housing or each have their own housing or into one Housing are received and / or connected to each other by means of a connecting element.

Gemäß eines weiteren Gedankens der Erfindung ist es vorteilhaft, wenn der erste und/oder der zweite Wärmeübertragerkern ein Rohrbündelwärmeübertragerkern mit einem Bündel von von dem ersten Fluid durchströmbaren Rohren ist, die an ihren Enden jeweils in Öffnungen eines Rohrbodens aufgenommen sind, wobei die Rohre von dem ersten bzw. zweiten Kühlfluid umströmbar sind.According to a further aspect of the invention, it is advantageous if the first and / or the second heat transfer core is a shell and tube heat transfer core with a bundle of tubes through which the first fluid can be taken, which are received at their ends in openings of a tube plate, the tubes of the first and second cooling fluid can flow around.

Auch ist es zweckmäßig, wenn der Einlasskasten des zweiten Wärmetauschers und/oder der Auslasskasten des ersten Wärmetauschers eine Öffnung aufweist, in welcher der erste bzw. der zweite Wärmetauscher eingebracht ist.It is also expedient if the inlet box of the second heat exchanger and / or the outlet box of the first heat exchanger has an opening in which the first or the second heat exchanger is introduced.

Dabei ist es vorteilhaft, wenn der erste und/oder der zweite Wärmeübertragerkern ein Rohrbündelwärmeübertragerkern oder Scheibenwärmeübertragerkern ist, mit einem Bündel oder Stapel von Rohren oder Scheiben, wobei die Rohre oder Scheiben von dem ersten Fluid umströmbar sind und wobei die Rohre oder Scheiben von dem ersten bzw. zweiten Kühlfluid durchströmbar sind.It is advantageous if the first and / or the second heat transfer core is a Rohrbündelwärmeübertragerkern or Scheibenwärmeübertragerkern, with a bundle or stack of pipes or disks, wherein the tubes or disks are flowed around by the first fluid and wherein the tubes or disks of the first or second cooling fluid can be flowed through.

Vorteilhaft ist es auch, wenn der Einlasskasten des zweiten Wärmetauschers und/oder der Auslasskasten des ersten Wärmetauschers eine Öffnung aufweist, in welcher der erste bzw. der zweite Wärmetauscher eingebracht ist.It is also advantageous if the inlet box of the second heat exchanger and / or the outlet box of the first heat exchanger has an opening in which the first or the second heat exchanger is introduced.

Weiterhin ist es vorteilhaft, wenn der in die Öffnung eingebrachte Wärmetauscher an einer Seite einen Sammelkasten aufweist, der aus der Öffnung zumindest teilweise herausragt und zumindest einen Anschluss für ein Kühlfluid aufweist.Furthermore, it is advantageous if the heat exchanger introduced into the opening has on one side a collecting box which at least partially protrudes from the opening and has at least one connection for a cooling fluid.

Auch ist es zweckmäßig, wenn der Austrittskasten des ersten oder des zweiten Wärmetauschers eine Verteilleiste des Zylinderkopfes darstellt oder mit einer solchen verbindbar ist.It is also expedient if the outlet box of the first or the second heat exchanger is a distributor strip of the cylinder head or can be connected to such.

Weitere vorteilhafte Ausgestaltungen sind durch die nachfolgende Figurenbeschreibung und durch die Unteransprüche beschrieben.Further advantageous embodiments are described by the following description of the figures and by the subclaims.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Nachstehend wird die Erfindung auf der Grundlage zumindest eines Ausführungsbeispiels anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine schematische Darstellung einer erfindungsgemäßen Wärmeübertrageranordnung mit zwei Stufen zur Kühlung eines Fluids, insbesondere einer Ladeluft,
Fig. 2
eine schematische Darstellung eines ersten Wärmeübertragers, insbesondere für die erste Stufe,
Fig. 3
eine schematische Darstellung eines ersten Wärmeübertragers, insbesondere für eine erste Stufe,
Fig. 4
eine schematische Darstellung eines ersten Wärmeübertragers, insbesondere für eine erste Stufe, in einer Explosionsdarstellung,
Fig. 5
eine schematische Darstellung eines zweiten Wärmeübertragers, insbesondere für eine zweite Stufe,
Fig. 6
eine schematische Darstellung eines zweiten Wärmeübertragers, insbesondere für eine zweite Stufe,
Fig. 7
eine schematische Darstellung eines zweiten Wärmeübertragers, insbesondere für eine zweite Stufe,
Fig. 8
eine schematische Darstellung eines zweiten Wärmeübertragers, insbesondere für eine zweite Stufe,
Fig. 9
eine schematische Darstellung einer nicht erfindungsgemäßen Wärmeübertrageranordnung mit zwei Wärmeübertragern zur zweistufigen Kühlung eines Fluids, wie insbesondere einer Ladeluft,
Fig. 10
eine Wärmeübertrageranordnung gemäß Fig. 9 in perspektivischer Ansicht,
Fig. 11
einen Rohrblock mit Rohrböden eines Wärmeübertragerkerns, und
Fig. 12
eine schematische Darstellung einer nicht erfindungsgemäßen Wärmeübertrageranordnung mit zwei Wärmeübertragern zur zweistufigen Kühlung eines Fluids, wie insbesondere einer Ladeluft.
The invention will be explained in more detail on the basis of at least one embodiment with reference to the drawings. Show it:
Fig. 1
1 is a schematic representation of a heat exchanger arrangement according to the invention with two stages for cooling a fluid, in particular a charge air,
Fig. 2
a schematic representation of a first heat exchanger, in particular for the first stage,
Fig. 3
a schematic representation of a first heat exchanger, in particular for a first stage,
Fig. 4
1 is a schematic representation of a first heat exchanger, in particular for a first stage, in an exploded view,
Fig. 5
a schematic representation of a second heat exchanger, in particular for a second stage,
Fig. 6
a schematic representation of a second heat exchanger, in particular for a second stage,
Fig. 7
a schematic representation of a second heat exchanger, in particular for a second stage,
Fig. 8
a schematic representation of a second heat exchanger, in particular for a second stage,
Fig. 9
1 is a schematic representation of a heat exchanger arrangement with two heat exchangers for two-stage cooling of a fluid, in particular a charge air, not according to the invention.
Fig. 10
a heat exchanger assembly according to Fig. 9 in perspective view,
Fig. 11
a tube block with tube sheets of a heat transfer core, and
Fig. 12
a schematic representation of a non-inventive heat exchanger assembly with two heat exchangers for two-stage cooling of a fluid, such as in particular a charge air.

Bevorzugte Ausführung der ErfindungPreferred embodiment of the invention

Die Figur 1 zeigt eine Wärmeübertrageranordnung 1 mit einem ersten Wärmeübertrager 2 und einem zweiten Wärmeübertrager 3, die von einem zu kühlenden ersten Fluid 4, wie Ladeluft, durchströmt werden. Dazu sind die Pfeile 5 und 6 verwendet, welche die Einströmung des Fluids 4 in den Einlasskasten 7 des ersten Wärmeübertragers kennzeichnen, bzw. die Ausströmung des ersten Fluids 4 aus dem Auslasskasten 8 des ersten Wärmeübertragers.The FIG. 1 shows a heat exchanger assembly 1 with a first heat exchanger 2 and a second heat exchanger 3, which are flowed through by a first fluid to be cooled 4, such as charge air. For this purpose, the arrows 5 and 6 are used, which characterize the inflow of the fluid 4 into the inlet box 7 of the first heat exchanger, and the outflow of the first fluid 4 from the outlet box 8 of the first heat exchanger.

Der erste Wärmeübertrager 2 wird somit gebildet durch einen Einlasskasten 7 und einen Auslasskasten 8, wobei zwischen dem Einlasskasten 7 und dem Auslasskasten 8 ein Wärmeübertragerkern 9 angeordnet ist, der von dem ersten Fluid 4 durchströmt wird.The first heat exchanger 2 is thus formed by an inlet box 7 and an outlet box 8, wherein between the inlet box 7 and the outlet box 8, a heat transfer core 9 is arranged, which is flowed through by the first fluid 4.

Im Ausführungsbeispiel der Figur 1 ist der erste Wärmeübertragerkern 9 als Rohrbündelwärmeübertragerkern ausgestaltet, bei dem eine Vielzahl von Rohren 10 in Rohrböden 11 und 12 endseitig und fluiddicht verbunden angeordnet sind, so dass das einströmende Fluid 4 ausgehend vom Einlasskasten 7 innen durch die Rohre 10 zum Auslasskasten 8 strömen kann, während die Rohre im Rohrbündel in einem Gehäuse 13 aufgenommen sind und von einem Kühlfluid umströmt werden können. Dazu weist das Gehäuse 13 einen Einlassanschluss 14 und einen Auslassanschluss 15 auf, so dass das Kühlfluid 16 gemäß dem Pfeil 17 in den Einlassanschluss 14 einströmen kann, um die Rohre 10 herumströmen kann und anschließend aus dem Auslassanschluss 15 wieder herausströmen kann, siehe Pfeil 18. Somit kühlt der erste Wärmeübertragerkern 9 das einströmende erste Fluid 4 von einer Eingangstemperatur auf eine erste Temperatur, mit der das Fluid in den Auslasskasten 8 eintritt.In the embodiment of FIG. 1 the first heat transfer core 9 is designed as a tube bundle heat transfer core, in which a plurality of tubes 10 in tube sheets 11 and 12 are arranged end and fluid-tight, so that the inflowing fluid 4 can flow from the inlet box 7 inside through the tubes 10 to the outlet box 8, while the tubes in the tube bundle are received in a housing 13 and can be flowed around by a cooling fluid. For this purpose, the housing 13 has an inlet connection 14 and an outlet connection 15, so that the cooling fluid 16 can flow into the inlet connection 14 according to the arrow 17, can flow around the tubes 10 and can then flow out of the outlet connection 15, see arrow 18. Thus, the first heat transfer core 9 cools the inflowing first fluid 4 from an inlet temperature to a first temperature at which the fluid enters the outlet box 8.

Im Auslasskasten 8 ist der zweite Wärmeübertrager 3 angeordnet. Dieser Wärmeübertrager 3 nimmt im Wesentlichen die gesamte Querschnittsfläche des Auslasskastens 8 ein, so dass im Wesentlichen der gesamte Strom des ersten Fluids 4 aus dem ersten Wärmeübertragerkern im Anschluss daran durch den zweiten Wärmeübertragerkern 19 des zweiten Wärmeübertragers 3 durchströmt, bevor es aus dem Auslasskasten 8 austreten kann.In the outlet box 8, the second heat exchanger 3 is arranged. This heat exchanger 3 occupies substantially the entire cross-sectional area of the outlet box 8, so that substantially all of the flow of the first fluid 4 from the first heat exchanger core thereafter flows through the second heat exchanger core 19 of the second heat exchanger 3 before it can exit the outlet box 8.

Das erste Fluid 4 strömt gemäß dem Pfeil 20 durch den ersten Wärmeübertrager 2, wobei das Kühlfluid gemäß Pfeil 21 in die entgegengesetzte Richtung strömt, so dass eine Gegenstromanordnung vorliegt.The first fluid 4 flows according to the arrow 20 through the first heat exchanger 2, wherein the cooling fluid according to arrow 21 flows in the opposite direction, so that there is a counter-current arrangement.

Der zweite Wärmeübertrager 3 ist quer zu der Durchströmungsrichtung 20 des ersten Fluids angeordnet, so dass das erste Fluid den Wärmeübertrager in seiner vollen Breite senkrecht zur Durchströmungsrichtung des Fluids 22 durchströmen kann. Dabei strömt das zweite Kühlfluid 23 durch den Einlassanschluss 24 in den Wärmeübertrager 3 ein, durchströmt gemäß Pfeil 22 den Wärmeübertrager quer zur Durchströmungsrichtung 20 des ersten Fluids, wird im Sammelkasten 25 beispielsweise U-förmig umgelenkt und strömt im Anschluss daran gemäß Pfeil 26 wieder zum Sammelkasten 27 zurück, von wo es aus dem Wärmeübertrager 3 wieder ausströmen kann. Wie zu erkennen ist, sitzt der Wärmeübertrager 3 mit einem Flansch 28 in einer Öffnung 29 des Auslasskastens 8 und dient der Abkühlung des Fluids von einer ersten Temperatur, mit welcher es den ersten Wärmeübertrager verlässt, auf eine zweite Temperatur, die unterhalb der ersten Temperatur liegt.The second heat exchanger 3 is arranged transversely to the flow direction 20 of the first fluid, so that the first fluid can flow through the heat exchanger in its full width perpendicular to the flow direction of the fluid 22. In this case, the second cooling fluid 23 flows through the inlet port 24 in the heat exchanger 3, flows through the heat exchanger according to arrow 22 transversely to the flow direction 20 of the first fluid is deflected in the collection box 25, for example, U-shaped and flows thereafter according to arrow 26 back to the collection box 27 back, from where it can flow out of the heat exchanger 3 again. As can be seen, the heat exchanger 3 is seated with a flange 28 in an opening 29 of the outlet box 8 and serves to cool the fluid from a first temperature, with which it leaves the first heat exchanger, to a second temperature which is below the first temperature ,

Das in Fig. 2 gezeigte Saugrohr 50 umfasst einen Einlasskasten 51. Dieser kann als Kunststoff-Spritzgussteil ausgebildet sein. Alternativ kann er auch als Metallteil ausgebildet sein. Der Einlasskasten 51 verjüngt sich im Querschnitt in einer Breitenrichtung B des Saugrohrs 50. An seinem seitlichen Ende mit maximalem Querschnitt ist ein Einlassanschluss 52 zur Zuführung von einem ersten Fluid, wie beispielsweise Ladeluft, vorgesehen, wie beispielsweise angeflanscht. Die Zuführung ist durch den Pfeil 53 gekennzeichnet. Der Einlasskasten 51 erfüllt im Wesentlichen die Funktion eines eintrittsseitigen Sammlers eines an den Eintrittsabschnitt 1 angrenzenden Wärmeübertragers 54. Der Wärmeübertrager 54 wird in einer Richtung gemäß Pfeil 55 von dem ersten Fluid durchströmt, wobei Wärme des Fluids an ein erstes Kühlfluid in Form eines flüssigen Kühlmittels abgegeben wird.This in Fig. 2 Suction tube 50 shown includes an inlet box 51. This can be formed as a plastic injection molded part. Alternatively, it may also be formed as a metal part. The inlet box 51 tapers in cross-section in a width direction B of the suction pipe 50. At its maximum cross-sectional end, an inlet port 52 for supplying a first fluid, such as charge air, is provided, such as flanged. The feed is indicated by the arrow 53. The inlet box 51 essentially fulfills the function of an inlet side The heat exchanger 54 is flowed through in a direction according to arrow 55 of the first fluid, wherein heat of the fluid is delivered to a first cooling fluid in the form of a liquid coolant.

Austrittsseitig des von dem ersten Fluid durchströmten Wärmeübertragers 54 ist ein Motorflansch 56 angeordnet, der an einen (nicht dargestellten) Zylinderkopf eines Verbrennungsmotors unmittelbar angeflanscht werden kann. Vorliegend erfolgt die Festlegung mittels Dichtflächen 57 und Befestigungsbohrungen 58. Der Durchtrittsquerschnitt des Motorflanschs 56 erweitert sich in Strömungsrichtung des ersten Fluids vom Austritt des Wärmeübertragers 54 bis zur Anschlussebene des Zylinderkopfs. Dabei stellt der Flansch 56 den Auslasskasten des Wärmeübertragers dar, welcher das erste Fluid dann direkt in den Zylinderkopf des Motors leiten kann.On the outlet side of the heat exchanger 54 through which the first fluid flows, a motor flange 56 is arranged, which can be flanged directly to a cylinder head (not shown) of an internal combustion engine. In the present case, the fixing takes place by means of sealing surfaces 57 and fastening bores 58. The passage cross-section of the motor flange 56 widens in the flow direction of the first fluid from the outlet of the heat exchanger 54 to the connection plane of the cylinder head. In this case, the flange 56 is the outlet box of the heat exchanger, which can then direct the first fluid directly into the cylinder head of the engine.

Der Wärmeübertrager wird dabei gebildet durch den Einlasskasten 51, den Auslasskasten 56 und den Wärmeübertragerkern 59, welcher zwischen den beiden Kästen 51, 56 angeordnet ist. Der Wärmeübertragerkern 59 ist dabei mittels einer Bördelung 60, 61 mit dem Einlasskasten 51 und Auslasskasten 56 verbunden.The heat exchanger is formed by the inlet box 51, the outlet box 56 and the heat transfer core 59, which is arranged between the two boxes 51, 56. The heat transfer core 59 is connected by means of a flange 60, 61 with the inlet box 51 and outlet box 56.

Der Wärmeübertragerkern 59 wird von einem ersten Kühlfluid durchströmt, welches durch den Anschluss 62 einströmt, durch den Kern 59 strömt und bei dem Anschluss 63 wieder ausströmt. Dabei strömt das erste Kühlfluid im Gegenstrom gemäß Pfeil 64 zu der Strömungsrichtung 55 des ersten Fluids.The heat transfer core 59 is flowed through by a first cooling fluid, which flows through the port 62, flows through the core 59 and flows out again at the port 63. In this case, the first cooling fluid flows in countercurrent according to arrow 64 to the flow direction 55 of the first fluid.

Der Motorflansch 56 ist vorliegend als Aluminium-Druckgussteil ausgeformt. Er kann aber auch als Kunststoffteil gebildet sein. Er umfasst an einem seitlichen Bereich ein Anschlussglied 65 für eine Hochdruck-Abgasrückführung, die jedoch auch optional ist und weggelassen sein kann.The motor flange 56 is presently formed as an aluminum die cast part. But it can also be formed as a plastic part. It comprises at a lateral region a connection member 65 for a high pressure exhaust gas recirculation, which is also optional and may be omitted.

Der Wärmeübertragerkern 70 ist in Fig. 3 sowie in der explodierten Darstellung nach Fig. 4 im Detail dargestellt. Er umfasst eine Mehrzahl von in der Breitenrichtung B gestapelten Rohren 71, die als Flachrohre ausgebildet sind. Die Breitseiten der Flachrohre erstrecken sich in Hochrichtung H und Tiefenrichtung T. Die Schmalseiten der Flachrohre erstrecken sich in Hochrichtung H und Breitenrichtung B. Nicht dargestellt sind Turbulenzeinlagen oder Rippen, die jeweils zwischen den Breitseiten benachbarter Flachrohre 71 angeordnet sind. Diese können mit den Rohren auch flächig verlötet sein.The heat transfer core 70 is in Fig. 3 as well as in the exploded illustration Fig. 4 shown in detail. It comprises a plurality of tubes 71 stacked in the width direction B and formed as flat tubes. The broad sides of the flat tubes extend in the vertical direction H and depth direction T. The narrow sides of the flat tubes extend in the vertical direction H and width direction B. Not shown are turbulence inserts or ribs, which are each arranged between the broad sides of adjacent flat tubes 71. These can also be soldered flat with the pipes.

Die Flachrohre 5 sind vorliegend als aus Blechen gefaltete und geschweißte oder extrudierte Flachrohre ausgeformt. Sie können alternativ auch als Strangpressprofile ausgebildet sein. Je nach Anforderungen können die Flachrohre 71 Einprägungen nach innen und/oder nach außen aufweisen, um Turbulenzen zu erzeugen und/oder einen definierten Abstand benachbarter Flachrohre bei einer Montage zu gewährleisten. Das Innere der Flachrohre 71 kann alternativ oder zusätzlich zu solchen Ausprägungen mit Turbulenzeinlagen oder Rippenblechen versehen sein.The flat tubes 5 are presently formed as folded from sheets and welded or extruded flat tubes. Alternatively, they can also be designed as extruded profiles. Depending on requirements, the flat tubes 71 can have indentations inwards and / or outwards in order to generate turbulence and / or to ensure a defined spacing of adjacent flat tubes during assembly. The interior of the flat tubes 71 may alternatively or in addition to such forms be provided with turbulence inserts or fin sheets.

Die Flachrohre 71 münden endseitig in Öffnungen 72 mit oder ohne Durchzüge eines Rohrbodens 73. Die Rohrböden 73 sind als Blechformteile aus einem Aluminiumblech hergestellt. Eintrittsseitiger und austrittsseitiger Boden 73 sind vorteilhaft baugleich, wodurch die Zahl der verschiedenen Bauteile verringert wird.The flat tubes 71 open at the ends in openings 72 with or without passages of a tube plate 73. The tube plates 73 are produced as sheet metal parts from an aluminum sheet. On the inlet side and outlet side bottom 73 are advantageously identical, whereby the number of different components is reduced.

Der Stapel von Flachrohren 71 wird von einem Wassermantel 74 umfangen, der einen ersten Wassermantelteil 75 und einen zweiten Wassermantelteil 76 aufweist. Der Wassermantel 74 bildet zugleich einen Teil des Gehäuses des erfindungsgemäßen Saugrohrs aus, welches insgesamt von dem Eintrittsabschnitt 51, dem Wassermantel 74 und dem Motorflansch 56 gebildet ist.The stack of flat tubes 71 is surrounded by a water jacket 74, which has a first water jacket part 75 and a second water jacket part 76. The water jacket 74 also forms part of the housing of the suction pipe according to the invention, which is formed overall by the inlet section 51, the water jacket 74 and the motor flange 56.

Beide Wassermantelteile 75, 76 haben jeweils eine Basis 77, 78 mit zwei endseitigen, abgewinkelten Schenkeln 79. Die Basis 77, 78 erstreckt sich jeweils entlang der Breitenrichtung B quer zu der Strömungsrichtung des ersten Fluids, wie der Ladeluft, und ist flächig mit den Schmalseiten der Tauscherrohre 71 verlötet. Die Schenkel 79 überdecken jeweils einen Teil einer Breitseite des jeweils äußeren Flachrohrs 71 des Stapels und sind mit dieser Breitseite flächig verlötet.Both water jacket parts 75, 76 each have a base 77, 78 with two end, angled legs 79. The base 77, 78 extends in each case along the width direction B transverse to the flow direction of the first fluid, such as the charge air, and is flat with the narrow sides the exchanger tubes 71 soldered. The legs 79 each cover a portion of a broad side of each outer flat tube 71 of the stack and are soldered flat with this broadside.

Alternativ hat der Wassermantel zwei Basis 77, 78 und zwei endseitige Seitenteile 79, die von der Basis getrennt ausgebildet sind. Dabei sind sowohl die Basis als auch die Seitenteile im Wesentlichen flach ausgebildet und bilden die vier Seiten eines Vierecks bzw. Kastens. Die Basis 77, 78 erstreckt sich jeweils entlang der Breitenrichtung B quer zu der Strömungsrichtung des ersten Fluids, wie der Ladeluft, und ist flächig mit den Schmalseiten der Tauscherrohre 71 verlötet. Die Seitenteile 79 überdecken die Breitseite des jeweils äußeren Flachrohrs 71 des Stapels und sind mit dieser Breitseite flächig verlötet.Alternatively, the water jacket has two bases 77, 78 and two end side portions 79 formed separately from the base. In this case, both the base and the side parts are substantially flat and form the four sides of a square or box. The base 77, 78 extends in each case along the width direction B transversely to the flow direction of the first fluid, such as the charge air, and is soldered flat with the narrow sides of the exchanger tubes 71. The side parts 79 cover the broad side of the respective outer flat tube 71 of the stack and are soldered flat with this broad side.

Alternativ kann der seitliche Schenkel auch vollflächig sein und von den seitlichen Flachrohren beabstandet sein, so dass sich ein Gehäuse bildet, das vollständig durchströmt werden kann und damit auch die äußeren Flachrohre umströmt werden können.Alternatively, the lateral limb can also be full-surface and be spaced from the lateral flat tubes, so that a housing forms, which can be flowed through completely and thus also the outer flat tubes can be flowed around.

Zur Verbindung der Rohrböden 73 bzw. des Gehäuses mit den Einlass- bzw. Auslasskästen 51, 56 gemäß Figur 2 sind an den Rohrböden 73 umlaufende Ränder 80 vorgesehen, welche als Bördelung der Verbindung mit den Einlass- und Auslasskästen dienen.For connecting the tube plates 73 and the housing with the inlet and outlet boxes 51, 56 according to FIG. 2 are provided on the tubesheets 73 circumferential edges 80, which serve as flanging the connection with the inlet and outlet boxes.

Die Wassermantelteile 75, 76 haben im Bereich ihrer Basen 77, 78 jeweils längliche, sich in der Breitenrichtung B erstreckende Ausbuchtungen 81, die die Funktion eines Sammlers für das die Flachrohre 71 umströmende flüssige erste Kühlfluid ausüben. Zur Zuleitung und Ableitung des Kühlfluids sind an den Ausbuchtungen 81 des einen Wassermantelteils Anschlüsse 82, 83 vorgesehen. Die Ausbuchtungen 81 an dem zweiten, unten dargestellten Wassermantelteil verbessern die Verteilung des Kühlfluids, das insgesamt im Wesentlichen in der Hochrichtung H entgegengesetzt zu der Strömungsrichtung des ersten Fluids Ladeluft an den Breitseiten der Flachrohre 71 entlang strömt, also in Gegenstromrichtung bezüglich des ersten Fluids strömt. Bei alternativen Ausführungsformen können die Anschlüsse auch an unterschiedlichen Seiten des Wassermantels vorgesehen sein.The water jacket parts 75, 76 each have, in the region of their bases 77, 78, elongated bulges 81 extending in the width direction B, which function as collectors for the liquid first cooling fluid flowing around the flat tubes 71. For supply and discharge of the cooling fluid are on the bulges 81 of a water jacket part ports 82, 83 are provided. The bulges 81 on the second water jacket part, shown below, improve the distribution of the cooling fluid, which flows essentially in the vertical direction H opposite to the flow direction of the first fluid charge air along the broad sides of the flat tubes 71, that flows in the counterflow direction with respect to the first fluid. In alternative embodiments, the ports may also be provided on different sides of the water jacket.

Die Rohrböden 73 werden zusammen mit den Flachrohren 71 und den Wassermantelteilen 75, 76 mechanisch vormontiert bzw. kassettiert und in einem Lötofen zu einem Wärmetauscherblock verlötet. Hierzu sind geeignete Oberflächen der einzelnen Bauteile mit Lot plattiert.The tubesheets 73 are mechanically preassembled or cassetted together with the flat tubes 71 and the water jacket parts 75, 76 and soldered in a brazing oven to form a heat exchanger block. For this purpose, suitable surfaces of the individual components are plated with solder.

Zum Anschluss des Einlasskastens und des Motorflansches als Auslasskasten haben die Böden um 90° abgewinkelte Ränder, die vorteilhaft mit Wellschlitz-Bördelungen versehen sind. Bei der Montage des erfindungsgemäßen Saugrohrs werden korrespondierende Strukturen an den Seiten des Einlasskastens und des Motorflansches als Auslasskasten mit den Wellschlitz-Bördelungen formschlüssig verbunden, so dass eine nicht dargestellte Dichtung zwischen Einlasskasten und des Motorflansches als Auslasskasten einerseits sowie dem jeweiligen Boden andererseits dichtend angepresst ist.To connect the inlet box and the motor flange as an outlet box, the floors have edges that are 90 ° angled, which are advantageously provided with corrugated slots. During assembly of the intake manifold according to the invention, corresponding structures on the sides of the inlet box and the engine flange as an outlet box with the Wellschlitz flanges positively connected, so that a seal, not shown between the inlet box and the engine flange as an outlet box on the one hand and the respective bottom is pressed sealingly on the other hand.

Die Figuren 5, 6, 7 und 8 zeigen schematische Ausgestaltungen von Wärmeübertragern, die als erste oder zweite Wärmeübertrager verwendet werden können, und die in einen Einlass- bzw. Auslasskasten angeordnet werden können. Dabei verfügen die Wärmeübertrager 101, 102, 103 jeweils über einen Wärmeübertragerkern 104, 105, 106 und einen ersten Sammelkasten 107, 108, 109 sowie über einen Umlenkkasten 110, 111, 112, wobei der eine Sammelkasten 107, 108, 109 und der Umlenkkasten 110, 111, 112 jeweils an entgegengesetzten Enden des Wärmeübertragerkerns angeordnet sind.The FIGS. 5, 6 . 7 and 8 show schematic embodiments of heat exchangers, which can be used as first or second heat exchanger, and which can be arranged in an inlet and outlet box. In this case, the heat exchangers 101, 102, 103 each have a heat transfer core 104, 105, 106 and a first collection box 107, 108, 109 and a deflection box 110, 111, 112, wherein the one collecting box 107, 108, 109 and the deflection box 110th , 111, 112 are respectively disposed at opposite ends of the heat exchanger core.

Der Sammelkasten 107, 108, 109 weist dabei jeweils einen Einlassanschluss 113 und einen Auslassanschluss 114 auf, so dass ein erstes oder zweites Kühlfluid durch den Einlassanschluss in den Sammelkasten einströmen kann, durch den Wärmetauscherkern strömen kann, um im Umlenkkasten umgelenkt zu werden, um anschließend den Wärmetauscherkern erneut zu durchströmen, um im Sammelkasten, der vorteilhaft getrennt durch eine Trennwand unterteilt ist, wieder einzuströmen, um durch den Auslassstutzen 114 wieder aus dem Wärmeübertrager auszuströmen.In this case, the collecting box 107, 108, 109 respectively has an inlet port 113 and an outlet port 114, so that a first or second cooling fluid can flow through the inlet port into the collecting box, through which the heat exchanger core can flow in order to be deflected in the deflection box, in order subsequently to flow through the heat exchanger core again to flow back into the collecting box, which is advantageously separated by a partition, to flow out through the outlet port 114 again from the heat exchanger.

Mit dem jeweiligen Sammelkasten ist ein Flansch 115 vorgesehen, welcher dazu dient, dass der Wärmeübertrager in einer Öffnung in einem Gehäuse, beispielsweise eines Einlasskastens oder eines Auslasskastens, angeordnet und abgedichtet befestigt werden kann.With the respective collection box, a flange 115 is provided, which serves that the heat exchanger in an opening in a housing, such as an inlet box or an outlet box, can be arranged and sealed sealed.

Ein Wärmeübertragerkern gemäß den Figuren 5 bis 8 ist vorteilhaft als Kühlerblock mit Rohren und Rippen ausgebildet, wobei die Rohre mit den Sammelkästen durch Öffnungen in einem Rohrboden fluiddicht eingepasst und verbunden sind und ein Kühlmittel durch den Innenraum der Rohre strömt, wobei zwischen den Rohren vorteilhaft Rippen oder Turbulenzeinlagen angeordnet sind, so dass quer zur Strömungsrichtung des Fluids durch die Rohre ein erstes Fluid durchströmen kann, bzw. um die Rohre des Kühlerblocks herumströmen kann, um den Wärmetauscher zu durchströmen.A heat transfer core according to the FIGS. 5 to 8 is advantageously designed as a radiator block with tubes and ribs, wherein the tubes are fluid-tightly fitted and connected to the manifolds through openings in a tube sheet and a coolant flows through the interior of the tubes, wherein between the tubes advantageous ribs or turbulence liners are arranged so that transversely to the flow direction of the fluid through the tubes can flow through a first fluid, or can flow around the tubes of the radiator block to flow through the heat exchanger.

Die Figuren 6, 7 und 8 zeigen Ausführungsbeispiele eines Wärmeübertragers, bei dem der Sammelkasten mit der Flanschplatte an einem seitlichen kleinen Ende des Wärmetauscherkerns angeordnet ist, wobei das Ausführungsbeispiel der Figur 5 ein Ausführungsbeispiel ist, bei dem der Sammelkasten mit der Flanschplatte an einem seitlichen größeren Endbereich des Wärmeübertragerkerns angeordnet ist. Dabei ist in Figur 5 die Flanschplatte im Wesentlichen in einer Ebene parallel zu einer Ebene der Rohre angeordnet, wobei in den Figuren 6 bis 8 die Flanschplatte im Wesentlichen in einer Ebene angeordnet ist, die senkrecht zu der Ebene der Flachrohre ausgerichtet ist.The FIGS. 6 . 7 and 8 show embodiments of a heat exchanger in which the collecting box is arranged with the flange plate at a lateral small end of the heat exchanger core, wherein the embodiment of the FIG. 5 an embodiment is, in which the collecting box is arranged with the flange plate at a lateral larger end portion of the heat exchanger core. It is in FIG. 5 the Gland plate arranged substantially in a plane parallel to a plane of the tubes, wherein in the FIGS. 6 to 8 the flange plate is arranged substantially in a plane which is aligned perpendicular to the plane of the flat tubes.

Ein Wärmeübertrager gemäß der Figuren 5 bis 8 kann somit einfach in eine Öffnung eines Einlass- oder Auslasskastens gemäß der Figur 1 integriert werden, so dass der Wärmeübertrager den zweiten Wärmeübertrager im Auslasskasten des ersten Wärmeübertragers bilden kann.A heat exchanger according to the FIGS. 5 to 8 can thus easily into an opening of an inlet or outlet box according to the FIG. 1 be integrated, so that the heat exchanger can form the second heat exchanger in the outlet of the first heat exchanger.

Die Figur 9 zeigt ein weiteres nicht erfindungsgemäßes Ausführungsbeispiel einer Wärmeübertrageranordnung 200, bei welcher zwei Wärmeübertragerkerne 201 und 202 in ein Gehäuse 203 aufgenommen sind. Die Figuren 10 und 11 zeigen diese Wärmeübertrageranordnung noch einmal in einer perspektivischen Darstellung von außen, bzw. einen Wärmeübertragerkern mit Rohren und Rohrböden.The FIG. 9 shows a further non-inventive embodiment of a heat exchanger assembly 200, in which two heat exchanger cores 201 and 202 are accommodated in a housing 203. The FIGS. 10 and 11 show this heat exchanger arrangement again in a perspective view from the outside, or a heat transfer core with tubes and tube sheets.

Die Figur 11 zeigt dazu den Wärmetauscherkern 201 als Anordnung von Rohren 204, die in Rohrböden 205, 206 in Öffnungen aufgenommen sind, wobei zwischen den Rohren 204 jeweils Turbulenzeinlagen 207 angeordnet sind, welche von einem die Rohre umströmenden Kühlmittel durchströmt werden.The FIG. 11 shows the heat exchanger core 201 as an array of tubes 204 which are received in tube plates 205, 206 in openings, wherein between the tubes 204 each turbulence inserts 207 are arranged, which are flowed through by a flowing around the tubes coolant.

Die Figur 12 zeigt eine nicht erfindungsgemäße Wärmeübertrageranordnung, die aus im Wesentlichen zwei Wärmeübertragerkernen im Wesentlichen entsprechend der Figuren 3 bzw. 4 oder diesen ähnliche Wärmeübertragerkerne gebildet ist. Dabei wird ein erster Wärmeübertragerkern 301 zwischen einem Einlasskasten 302 und einem Zwischenelement 303 angeordnet, wobei der zweite Wärmeübertragerkern 304 zwischen dem Zwischenelement 303 und dem Auslasskasten 305 angeordnet ist. Das erste zu kühlende Fluid strömt gemäß Pfeil 306 durch den Einlassanschlussflansch bzw. durch den Einlassanschlussstutzen 307 in den Einlasskasten 302. Anschließend durchströmt er den Wärmübertragerkern 301. Von dort strömt er in das Zwischenelement 303, welches als Kopplungselement dient. Von dort strömt das erste Fluid durch den zweiten Wärmeübertragerkern 304 und anschließend durch den Auslasskasten 305 und den entsprechenden Anschlussstutzen 308 gemäß Pfeil 309 wieder aus.The FIG. 12 shows a non-inventive heat exchanger assembly, which consists of substantially two heat exchanger cores substantially corresponding to Figures 3 or 4 or this heat exchanger cores similar is formed. In this case, a first heat transfer core 301 is arranged between an inlet box 302 and an intermediate element 303, wherein the second heat transfer core 304 is arranged between the intermediate element 303 and the outlet box 305. The first fluid to be cooled flows according to arrow 306 through the inlet connection flange or through the inlet connecting piece 307 into the inlet box 302. Subsequently it flows through the heat transfer core 301. From there it flows into the intermediate element 303, which serves as a coupling element. From there, the first fluid flows through the second heat exchanger core 304 and then through the outlet box 305 and the corresponding connecting piece 308 according to arrow 309 again.

Die Wärmeübertragerkerne weisen ein Gehäuse mit einer entsprechenden Abdeckung 310, 311 auf, wobei Anschlussstutzen 312, 313, 314 und 315 vorgesehen sind, zur Einströmung bzw. zur Ausströmung eines ersten Kühlfluids für den ersten Wärmübertragerkern 301 und für ein zweites Kühlfluid für den zweiten Wärmeübertragerkern 304.The heat exchanger cores have a housing with a corresponding cover 310, 311, wherein connecting pieces 312, 313, 314 and 315 are provided, for the inflow or outflow of a first cooling fluid for the first heat transfer core 301 and for a second cooling fluid for the second heat transfer core 304 ,

Wie zu erkennen ist, sind die Rohrböden 316, 317, 318, 319 jeweils beiderseits des Wärmeübertragerkerns 301 bzw. 304 angeordnet und dienen der Verbindung zwischen dem Wärmeübertragerkern und dem Einlasskasten 302 bzw. dem Auslasskasten 305 sowie mit dem Zwischenelement 303. Die Verbindung erfolgt vorteilhaft über eine Wellschlitzbördelung.As can be seen, the tubesheets 316, 317, 318, 319 are respectively arranged on both sides of the heat exchanger core 301 or 304 and serve the connection between the heat exchanger core and the inlet box 302 and the outlet box 305 and with the intermediate element 303. The connection is advantageous via a corrugated slot flange.

In den Rohren 204 können weiterhin nicht dargestellte ladeluftseitige Rippen angeordnet sein.In the tubes 204 may further not shown charge air side ribs may be arranged.

Der Eintrittskasten 208 ist als trichterförmiges Element mit einem Rohranschlussstutzen 209 ausgebildet. Der Auslasskasten 210 ist schematisch als sich öffnender Kasten ausgebildet, welcher mit einem Zylinderkopf des Motors verbindbar ist. Wie zu erkennen ist, sind die Gehäuseteile 203 der einzelnen Wärmetauscherkerne an der Grenzfläche miteinander verbunden, vorteilhaft einteilig miteinander ausgebildet. Dabei kann es besonders vorteilhaft sein, wenn die Gehäuse bzw. das Gehäuse 203 einteilig aus Kunststoff hergestellt wird. Die Gehäusestruktur kann dabei im Wesentlichen rechteckig ausgebildet sein, wobei an der Oberfläche eine rippenartige Gestaltung zur Verbesserung der Festigkeit ausgebildet sein kann.The inlet box 208 is formed as a funnel-shaped element with a pipe connection piece 209. The outlet box 210 is schematically formed as an opening box, which is connectable to a cylinder head of the engine. As can be seen, the housing parts 203 of the individual heat exchanger cores are connected to one another at the interface, advantageously formed integrally with one another. It may be particularly advantageous if the housing or the housing 203 is made in one piece from plastic. The housing structure may be formed substantially rectangular, wherein on the surface of a rib-like design may be formed to improve the strength.

Weiterhin sind Anschlussstutzen 211, 212, 213 und 214 zu erkennen, die dazu dienen, ein erstes Kühlfluid und ein zweites Kühlfluid in den ersten Wärmetauscherkern bzw. in den zweiten Wärmetauscherkern einzulassen und wieder auszulassen. Dazu wird das erste Kühlfluid in den Einlass 212 eingelassen, es durchströmt den Wärmetauscherkern und umströmt die dort angeordneten Rohre 204 und wird bei dem Auslass 211 wieder aus dem Wärmetauscherkern ausgelassen. Bei dem Anschluss 214 wird das zweite Kühlfluid in den zweiten Wärmetauscherkern eingelassen, es durchströmt ebenso den Wärmetauscherkern und umströmt die dort angeordneten Rohre 204, bevor es bei dem Auslassanschluss 213 den Wärmetauscherkern wieder verlässt. Die beiden Wärmetauscherkerne werden somit im Gegenstrom im Vergleich zur Strömungsrichtung des ersten Fluids, wie der Ladeluft, durchströmt.Furthermore, connecting stubs 211, 212, 213 and 214 can be seen, which serve to admit and discharge a first cooling fluid and a second cooling fluid into the first heat exchanger core and into the second heat exchanger core, respectively. For this purpose, the first cooling fluid is introduced into the inlet 212, flows through the heat exchanger core and flows around the tubes 204 arranged there and is discharged from the heat exchanger core at the outlet 211 again. In the connection 214, the second cooling fluid is introduced into the second heat exchanger core, it also flows through the heat exchanger core and flows around the tubes 204 arranged there, before it leaves the heat exchanger core again at the outlet connection 213. The two heat exchanger cores are thus flowed through in countercurrent in comparison to the flow direction of the first fluid, such as the charge air.

Dabei wird die Wärmeübertrageranordnung von einem Gehäuse 203 als Kunststoffmantel umhaust. Auch kann das Gehäuse aus Kunststoff oder alternativ aus Metall, wie beispielsweise aus Aluminium, gebildet werden.The heat exchanger assembly is surrounded by a housing 203 as a plastic jacket. Also, the housing can be made of plastic or alternatively of metal, such as aluminum.

Die beiden Kühlfluide werden über die Abdichtung 215 zwischen den mittleren Böden 216, 217 mit dem Gehäuse 203 getrennt, so dass es zu keiner Vermischung der Kreisläufe kommen kann.The two cooling fluids are separated via the seal 215 between the middle floors 216, 217 with the housing 203, so that there can be no mixing of the circuits.

Bei entsprechender Bauweise, bei dem Aluminium-Kühlmittelmäntel mit den Flachrohren und Böden verlötet werden, können die beiden Rohrbündel der Wärmeübertragerkerne auch direkt miteinander verschweißt oder über eine mechanische Verbindung, wie beispielweise Krimpen oder Schrauben bzw. Kleben über ein Kunststoff- oder Aluminium-Zwischenelement als Kopplungselement verbunden werden. Ein Zwischenelement, welches über Elastomerdichtungen an beiden Böden abgedichtet wird, hat den Vorteil, dass dieses als Entkopplungselement Thermospannungen und Vibrationsspannungen, die zwischen den beiden Bauteilen auftreten können, reduzieren kann.With appropriate design in which aluminum coolant jackets are soldered to the flat tubes and floors, the two tube bundles of heat exchanger cores can also be welded directly to each other or via a mechanical connection, such as crimping or screws or gluing over a plastic or aluminum intermediate element as Coupling element to be connected. An intermediate element, which is sealed by elastomer seals on both floors, has the advantage that this as a decoupling element thermoelectric and Can reduce vibration stresses that can occur between the two components.

Claims (8)

  1. A heat exchanger arrangement (1), in particular for charge air cooling, with a first heat exchanger (2) and a second heat exchanger (3) through which a first fluid (4) requiring cooling flows in such a way that the first heat exchanger (2) is arranged ahead of the second heat exchanger (3) in the flow direction of the first fluid (4), wherein a first coolant flows through the first heat exchanger and a second coolant flows through the second heat exchanger such that the first heat exchanger cools the first fluid to a first temperature and the second heat exchanger cools the first fluid from the first temperature to a second temperature that is lower than the first temperature, wherein the first and the second heat exchanger are implemented as one structural unit, characterised in that the first heat exchanger (2) has an inlet box (7) and an outlet box (8) for the first fluid (4) and a heat exchanger core (9) arranged therebetween, wherein the second heat exchanger (3) is arranged in the outlet box (8) of the first heat exchanger (2) or the second heat exchanger (3) has an inlet box and an outlet box for the first fluid (4) and a heat exchanger core arranged therebetween, wherein the first heat exchanger is arranged in the inlet box of the second heat exchanger.
  2. The heat exchanger arrangement according to claim 1, characterised in that the first heat exchanger (2) has an inlet box (7) and a first heat exchanger core (9, 201) and the second heat exchanger (3) has a second heat exchanger core (202) and an outlet box for the first fluid, wherein the two heat exchanger cores (201, 202) are accommodated in a common housing (203) or each have a separate housing or are accommodated in one housing and/or are connected to one another via a connecting element.
  3. The heat exchanger arrangement according to one of the preceding claims, characterised in that the first and/or the second heat exchanger core (201, 202) is a tube bundle heat exchanger core with a bundle of tubes through which the first fluid can flow, ends of each of the tubes being accommodated in openings of a tube base, wherein the first or second coolant can flow around the tubes.
  4. The heat exchanger arrangement according to claim 3, characterised in that the inlet box of the second heat exchanger and/or the outlet box (8) of the first heat exchanger has an opening in which the first or the second heat exchanger is placed.
  5. The heat exchanger arrangement according to one of the preceding claims, characterised in that the first and/or the second heat exchanger core (201, 202) is a tube bundle heat exchanger core or plate heat exchanger core with a bundle or stack of tubes or plates, wherein around the tubes or plates the first fluid can flow, wherein the first or second coolant can flow through the tubes or plates.
  6. The heat exchanger arrangement according to claim 5, characterised in that the inlet box of the second heat exchanger and/or the outlet box (8) of the first heat exchanger has an opening in which the first or the second heat exchanger (2, 3) is placed.
  7. The heat exchanger arrangement according to one of the preceding claims, characterised in that the heat exchanger placed in the opening has, on one side, a header box that projects at least partially out of the opening and has at least one connection for a coolant.
  8. The heat exchanger arrangement according to one of the preceding claims, characterised in that the outlet box of the first or of the second heat exchanger (2, 3) is a manifold of the cylinder head or is connectable with the manifold.
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EP2628896A3 (en) 2014-03-12
DE102012202234A1 (en) 2013-08-14
EP2628896A2 (en) 2013-08-21
US20130206364A1 (en) 2013-08-15

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