DE102009049282A1 - Heat exchanger for use as cooling agent radiator of internal-combustion engine of motor vehicle, has pipes and collecting boxes connected with one another using heat guiding device, which locks exchange areas in coolant-tight manner - Google Patents

Abstract

The exchanger (1) has fluid-guiding components (2) provided with collecting boxes (4, 5) and fluid pipes (3). The fluid pipes and the collecting boxes are spatially connected with one another in exchange areas (15) using a heat guiding device (9) such that fluid flows through the fluid pipes from one of the collecting boxes to the other collecting box. The heat guiding device outwardly locks the exchange areas in a coolant-tight manner, where the heat guiding device comprises a sealant (16). The heat guiding device and/or the sealant and the components are made of an open-porous aluminum foam.

Description

The The invention relates to a heat exchanger with fluid-conducting Components comprising at least collecting boxes and fluid pipes and with a heat conducting device, in which the fluid pipes and the collecting boxes in connection areas so spatially connected to each other, that is a fluid through the fluid pipes passing from a first of the headers to another the collection boxes can get.

Heat exchanger are well known in the art. They become common used in the field of automotive engineering, for example as Coolant cooler of an internal combustion engine of a motor vehicle. Also, heat exchangers are, for example, as capacitors, Radiator or evaporator known.

It object of the present invention is a generic Heat exchanger to develop, so he in particular easier to produce.

The The object of the invention is a heat exchanger with fluid-conducting components comprising at least collecting boxes and fluid pipes and solved with a heat conduction device, in which the fluid pipes and the collecting boxes in connection areas are spatially interconnected such that a fluid through the fluid pipes from a first one of the headers can get to another of the collection boxes, and in which the fluid pipes and the heat conduction device can form a heat exchanger network, wherein the heat exchanger is characterized in that the heat conducting the connection areas outside coolant tightly seals.

Thereby, that the heat conducting device, the connection areas outside Closes coolant tight, the present builds Heat exchanger according to the invention very easy, as for example on solder joints between the fluid pipes and collecting tanks are dispensed with can. There is no question that this causes the production makes the heat exchanger much easier.

With the term "heat exchanger" is in the present case, any device is described by means of which process heat transferred from a first medium to another medium can be, so that the first medium are cooled in this case can. In particular, this heat exchangers detected by motor vehicles, such as used there Cross-flow heat exchanger, in which one to cooling coolant liquid and / or gas through cooling tubes of the heat exchanger is passed, which also with a heat conduction device can be in contact, and in which the heat conducting device additionally circulated and / or flowed through by ambient air can be, so that the heat energy from the coolant in particular via the heat conducting device the ambient air can be diverted particularly well.

One Such closed coolant circuit can in one first embodiment by an engine block a Internal combustion engine, by connected thereto circulation line strands and by the heat exchanger according to the invention to be provided. It is understood that the present heat exchanger also be used with regard to other cooling purposes can.

Such "heat conducting devices" are also known from the prior art and available in various embodiments. For example, in the published patent application CA 2 490 563 A1 describes a heat exchanger in which an open-pored metal foam is disposed between pipes for conducting cooling water or steam, so that by means of the metal foam heat dissipation of ambient air, which can flow through the metal foam, is substantially improved. However, the open-cell metal foam does not seal the tubes to the outside in a coolant-tight manner, so that additional measures, such as soldering or welding, are required for this purpose.

Of the Term "collection boxes" describes in this Connected any structures, in which ends of the cooling tubes of the heat exchanger preferably different can protrude into it, and in which at least one Coolant introduced into the heat exchanger, discharged and / or can be easily or repeatedly redirected. The headers sit here preferably laterally one at least of the cooling tubes formed by the cooling tubes of the heat exchanger and can thus have a forming the heat exchanger limiting edge region.

With The term "fluid-tight" is present essentially a sealing with respect to a fluid, a liquid and / or a gas, depending on the use of the heat exchanger, so that these from the fluid-conducting components of the heat exchanger can not inadvertently enter the environment.

A "heat exchanger network" can in the case of the present heat exchanger, ideally consist of the fluid pipes and the heat conducting device. In essence, by means of the heat exchanger network a heat transfer between a first fluid and another fluid on the heat exchanger achieved.

With the term "connection areas" are those Areas of the heat exchanger detected at which For example, two together inserted fluid-conducting components of the heat exchanger into each other and thus spatially interconnected. Thus form the connection areas each interfaces between individual Components of the heat exchanger, through which through which a fluid can be passed. Such an interface can be characterized in particular by a gap between a fluid pipe and a collecting box is present. The fluid-conducting Components must be at the connection areas to the outside are sealed so that at the connection areas no fluid, no liquids and / or no gases from the fluid-conducting components can escape to the outside into the environment.

One Sealing of such column at the connection areas can by means of the Wärmeleiteinrichtung succeed particularly well when the Heat conducting device comprises a sealant. The sealant This can be on the outside of the fluid-conducting components nestle around the terminal areas, leaving existing column This makes it particularly easy to be closed structurally.

A preferred embodiment provides that the fluid pipes and the headers by means of the heat conducting device fluid, liquid and / or gas tight and firmly together are connected. Advantageously, here are no further constructive Action required to the fluid pipes and the collection boxes inseparably connect with each other.

are the fluid pipes loosely inserted into the collecting tanks, can a mounting of the heat exchanger made easier become. Preferably, it is sufficient on the basis of the present heat conducting device or the sealant when mounting the fluid-conducting components of the heat exchanger already off when the fluid-conducting Components are loosely plugged into each other. In particular an additional soldering or welding connection, like in generic heat exchangers for example, between fluid pipes and a tube plate of a collecting tank previously common, advantageously unnecessary.

For example is in previous Kühlmittelkühler concepts a rib / pipe assembly with floors of collection boxes soldered. The tightness is here on the actual solder joint after a corresponding soldering process achieved the heat exchanger. Although this can be a permanent tightness be reached at the relevant connection areas, however, due to the soldering process, it may become a decrease in strength the core material used all fluid-conducting components and the heat conducting device come, for example Made of an aluminum alloy that is up to 50% over may be the initial strength.

Favorable Way can in the present heat exchanger also such a decrease in strength in the present case can be avoided.

Also eliminates the one hand, a costly plating of components of a heat exchanger with solders and on the other hand can be dispensed with flux.

Also In this context, the object of the invention of a Heat exchanger with fluid-conducting components comprising at least collecting boxes and fluid pipes, in which the fluid pipes and the collecting boxes in connection areas spatially interconnected such that a fluid through the fluid pipes from a first one of the headers can get to another of the collecting boxes, and in which the fluid pipes form a heat transfer network, whereby the heat exchanger is characterized, the fluid-conducting components are coolant-sealed in a sealant are embedded to each other.

specifically, if in terms of the heat transfer network on an additional heat conduction omitted can be, the fluid pipes and the collection boxes good by means of the sealant on the one hand unsolvable and On the other hand, fluid-tightly connected to each other. Need for this the fluid-conducting components only at the connection areas be provided and sealed there by means of the sealant.

It It is understood that a suitable heat conducting device or a suitable sealant provided diverse can be. Are the heat conducting device and / or the Foamed sealant, they can be constructive be implemented particularly easily, reducing the heat exchanger constructive addition can be simplified.

A advantageous embodiment provides that the heat conducting device and / or the sealant of a metal or aluminum foam, preferably made of an aluminum foam with a multi-region Body, are made.

Aluminum foam is particularly suitable for heat exchangers made of aluminum or an alloy thereof exceptionally well, on the one hand a fluid tightness outside of the Anschlussberei Chen and on the other hand to ensure a permanent, permanent connection between the fluid pipes and the manifolds permanently. Instead of the aluminum foam, another metal foam may be used, such as copper foam. Accordingly, the aluminum foam is also synonymous with other metal foams.

Of the Term "multi-body" describes in this case a foamed body, preferably made of an aluminum foam, which is divided into different areas Properties is divided so that the multi-body in itself may have an inhomogeneous structure, which makes him special inherent versatile properties. It understands itself, that the aluminum foam are made of an alloy which is particularly good with an alloy of fluid-conducting Components and collection boxes can interact and be electrochemically tuned is. This means that the electrochemical potential of the aluminum foam alloy advantageously be 50 meV below the fluid-conducting component.

In this regard, is a use of a foamed material, in particular an aluminum foam, for sealing fluid-conducting components a heat exchanger extraordinary advantageous. Advantageously, due to the foamed Material on further additional bonding techniques be waived. In this respect, the manufacture of the heat exchanger can thereby be simplified.

About that addition, a use of a foamed material, especially an aluminum foam, for mechanical fastening of fluid-conducting components of a heat exchanger to each other enormously advantageous, since also here on additional Connection techniques can be dispensed with. Especially the aluminum foam can be a permanent form-fitting opposite the individual components of the heat exchanger or ensure the components to each other, so that too Excellent heat dissipation can be guaranteed.

A Particularly preferred embodiment provides that a first portion of the aluminum foam is made more porous is as more areas of aluminum foam. The porous one trained area is particularly well suited for one Heat dissipation to the environment, reducing to conventional Heat transfer fins, such as external corrugated fins, can be waived. In this respect, the present heat exchanger be structurally further simplified. By means of less porous trained areas can have better sealing properties will be realized.

Consequently sees a particularly preferred embodiment in Reference to exceptionally good sealing properties before, that the heat conduction device and / or the sealant closed pores or closed pores around the connection areas is formed as between the terminal areas.

Especially in connection with a heat exchanger Aluminum can be an excellent seal on the heat exchanger be ensured when the fluid-conducting components to the Connection areas around of a closed-cell aluminum foam are surrounded.

are the heat conduction device and / or the sealant between two connection areas of a fluid pipe open-pored formed as at the connection areas, may be a heat exchanger network the heat exchanger can be accomplished advantageous.

A Especially good heat dissipation between two media can guaranteed at the heat exchanger when the fluid-conducting components in the area of the heat exchanger network of surrounded by an open-pored aluminum foam.

Of Furthermore, different performance profiles of a Heat exchanger by the choice of aluminum alloy or a composite, the pore size, the orientation of the pores in the body and the thickness of the foam block or the body can be achieved.

About that In addition, the present heat exchanger can further distinguished by the fact that further seals, side parts, Floors, stiffeners and / or mounting brackets omitted can. If necessary, wall thicknesses the components of the heat exchanger used can be reduced because the components are approximately from the aluminum foam can be supported. Also can be an improved Corrosion protection can be achieved, for example against Splash. Especially because of the foamed body can be a crash performance in terms of a front-end composite be improved on a vehicle.

Further Advantages, objects and characteristics of the present invention explained on the basis of the following description of the appended drawing, in which by way of example a heat exchanger with a multi-section aluminum foam body shown is.

It the single figure shows schematically a view of a heat exchanger with fluid-conducting components, which are made of an aluminum foam sealed to each other fluid, liquid and / or gas-tight and which in addition are firmly connected with each other.

The heat exchanger shown in the single figure 1 in particular of a motor vehicle, not shown here, has fluid-conducting components 2 on, which in this embodiment of a plurality of, for example, approximately horizontally extending fluid pipes 3 , here only exemplarily numbered, a first collection box 4 and a second collection box 5 consist. The two collection boxes 4 and 5 For example, are arranged approximately vertically and by means of the fluid pipes 3 mechanically connected to each other. So can a fluid 6 which is at an upper end 7 of the collecting tank 4 in the heat exchanger 1 is introduced through the fluid pipes 3 through into the second collection box 5 get in. The fluid 6 then can the heat exchanger 1 again at a lower end 8th of the second collection box 5 leave.

The heat exchanger 1 further includes an additional heat device 9 by means of which heat from the coolant 6 very good to the environment 10 can be delivered.

In particular, the fluid pipes 3 and the heat conducting device 9 together form a heat exchanger network 11 of the heat exchanger 1 , about which the heat is particularly large area of the environment 10 can be added or delivered to the environment or a local medium or fluid. The heat conducting device 9 is foamed in the present case and in particular as mehrbereichiger body 12 made of aluminum foam 13 formed on block.

By means of aluminum foam 13 become the collection boxes 4 . 5 and the fluid pipes 3 which in openings or passages 14 the collection boxes 4 . 5 are plugged in, firmly connected. Thus, conventional solder joints between the coolant boxes 4 . 5 and the cooling pipes 3 in the area of the passages 14 omitted, so that the heat exchanger 1 is particularly advantageous to produce.

Advantageously, the aluminum foam seals 13 additionally all connection areas 15 with regard to the fluid pipes 3 and the collection boxes 4 respectively. 5 especially at the passages 14 so that even in this regard can be dispensed with sealing solder joints. Thus, the aluminum foam 13 altogether also as a sealant 16 be viewed, by means of which the fluid-conducting components 3 outside at the connection areas 15 be sealed fluid-tight.

The multi-body 12 in the present case is characterized by a first side area 17 , a second side area 18 and a third area therebetween 19 out, so he essentially enters those three areas 17 . 18 and 19 is divided.

The multi-body 12 is here in his third area 19 more porous than in the two side areas 17 and 18 such that a fluid, such as cooling air, 20 the third area 19 of the multi-body 12 ideally flow through and the heat conducting device 9 from the aluminum foam 13 especially there particularly good heat energy to the environment 10 can deliver. Thus, the heat conduction device 9 between two connection areas 15 the fluid pipes 3 open-pored than at the connection areas 15 so that the fluid-conducting components 2 in the area of the heat exchanger network 11 from an open-pore aluminum foam 13A are surrounded.

In contrast, in the side areas 17 and 18 a good seal on the multi-body 12 To be able to guarantee is the aluminum foam 13 around the connection areas 15 closed pores formed around as between the terminal areas 15 , Thus, the fluid-conducting components 2 around the connection areas 15 around from a closed-cell aluminum foam 13B surrounded, whereby the heat conduction device 9 at their ends 21 and 22 in the field of collection boxes 4 and 5 In particular, liquid and / or gas-tight can be formed.

In addition, the fluid-conducting components 2 of the heat exchanger 1 by means of the multi-body 12 particularly well protected for environmental influences.

LIST OF REFERENCE NUMBERS

1

Heat exchanger

2

fluid-conducting components

3

fluid tubes

4

first collection box

5

second collection box

6

fluid

7

upper The End

8th

lower The End

9

heat conducting

10

Surroundings

11

heat exchanger network

12

mehrbereichiger body

13

Aluminum foam

13A

open-pored Aluminum foam

13B

closed- Aluminum foam

14

Passages, openings

15

lands

16

caulk

17

first page range

18

second page range

19

third Area

20

Cooling air fluid

21

first End of the heat conducting device

22

second End of the heat conducting device

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - CA 2490563 A1 [0008]

Claims (14)

Heat exchanger ( 1 ) with fluid-conducting components ( 2 ) comprising at least collection boxes ( 4 . 5 ) and fluid pipes ( 3 ) and with a heat conducting device ( 9 ), in which the fluid pipes ( 3 ) and the collection boxes ( 4 . 5 ) in connection areas ( 15 ) are spatially interconnected such that a fluid ( 6 ) through the fluid pipes ( 3 ) through from a first ( 4 ) of the collection boxes ( 4 . 5 ) to another ( 5 ) of the collection boxes ( 4 . 5 ) and in which the fluid pipes ( 3 ) and the heat conducting device ( 9 ) a heat transfer network ( 11 ), characterized in that the heat conducting device ( 9 ) the connection areas ( 15 ) closes coolant-tight on the outside. Heat exchanger ( 1 ) according to claim 1, characterized in that the heat conducting device ( 9 ) a sealant ( 16 ). Heat exchanger ( 1 ) according to claim 1 or 2, characterized in that the fluid pipes ( 3 ) and the collection boxes ( 4 . 5 ) by means of the heat conducting device ( 9 ) are fluid-tightly interconnected. Heat exchanger ( 1 ) with fluid-conducting components ( 2 ) comprising at least collection boxes ( 4 . 5 ) and fluid pipes ( 3 ), in which the fluid pipes ( 3 ) and the collection boxes ( 4 . 5 ) in connection areas ( 15 ) are spatially interconnected such that a fluid ( 6 ) through the fluid pipes ( 3 ) through from a first ( 4 ) of the collection boxes ( 4 . 5 ) to another ( 5 ) of the collection boxes ( 4 . 5 ) and in which the fluid pipes ( 3 ) a heat transfer network ( 11 ), characterized in that the fluid-conducting components ( 2 ) in a sealant ( 16 ) are coolant-tightly embedded to each other. Heat exchanger ( 1 ) according to one of the preceding claims, characterized in that the heat conducting device ( 9 ) and / or the sealant ( 16 ) are foamed. Heat exchanger ( 1 ) according to one of the preceding claims, characterized in that the heat conducting device ( 9 ) and / or the sealant ( 16 ) from an aluminum foam ( 13 ), preferably of an aluminum foam ( 13 ) with a multi-body ( 12 ) are made. Heat exchanger ( 1 ) according to claim 6, characterized in that an area ( 19 ) of the aluminum foam ( 13 ) is more porous than other areas ( 17 . 18 ) of the aluminum foam ( 13 ). Heat exchanger ( 1 ) according to one of the preceding claims, characterized in that the heat conducting device ( 9 ) and / or the sealant ( 16 ) around the connection areas ( 15 ) are formed closed pores around than between the connection areas ( 15 ). Heat exchanger ( 1 ) according to one of the preceding claims, characterized in that the fluid-conducting components ( 2 ) around the connection areas ( 15 ) of a closed-pore aluminum foam ( 13B ) are surrounded. Heat exchanger ( 1 ) according to one of the preceding claims, characterized in that the heat conducting device ( 9 ) and / or the sealant ( 16 ) between two connection areas ( 15 ) at least one of the fluid pipes ( 3 ) are formed open-pored than at the connection areas ( 15 ). Heat exchanger ( 1 ) according to one of the preceding claims, characterized in that the fluid-conducting components ( 2 ) in the area of the heat exchanger network ( 11 ) of an open-pore aluminum foam ( 13A ) are surrounded. Heat exchanger ( 1 ) according to one of the preceding claims, characterized in that the fluid pipes ( 3 ) loosely in the collecting boxes ( 4 . 5 ) are inserted. Use of a foamed material, in particular an aluminum foam ( 13 ), for sealing fluid-conducting components ( 2 ) of a heat exchanger ( 1 ). Use of a foamed material, in particular an aluminum foam ( 13 ), for the mechanical fastening of fluid-conducting components ( 2 ) of a heat exchanger ( 1 ) to each other.

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