DE102009035239A1 - Stacked disc radiator, use of the stacked disc radiator and internal combustion engine with a stacked disc radiator - Google Patents

Abstract

The invention relates to a stacked-plate cooler (10), in particular oil cooler, for an internal combustion engine, comprising: - a number of trough-shaped plates (2) with a raised edge (15), the plates (2) being used to form adjacent hollow chambers (4 ) are stacked and joined together with the edge (15) at a distance; and - a base plate (20) having a base plate main plane (23); wherein a lowermost one of the plurality of trough-shaped plates (12) is attached to the base plate (20). According to the invention, a lowermost of the number of trough-shaped plates (12) is fastened directly on the base plate (20), wherein the base plate (20) has a depression (24) in the base plate main plane (23) and the lowermost plate (12) used in the recess and joined by means of a joint connection (F).

Description

The invention relates to a stacked-plate radiator according to the preamble of claim 1. Furthermore, the invention relates to a use of the stacked-plate radiator as an oil cooler. The invention also relates to an internal combustion engine with a stacked-plate radiator.

Stacking disc cooler of the type mentioned are, for example, as an oil cooler EP 0 623 798 A2 known. In such designs, the lowermost of the trough-shaped plates forms the weakest link in terms of strength. Oil coolers of this type are generally attached to the base plate, for example, directly to an engine block of an internal combustion engine and are therefore subjected to relatively high lateral acceleration forces during operation of the engine. In particular, the lowest of the number of trough-shaped plates is at risk of deforming in operation, so that in the worst case, the operation of the cooler is in question. It is therefore desirable to ensure the stability of a stacked-plate cooler, especially in the lower area, and a secure operation.

In DE 197 112 58 C2 The Applicant is to a stacked disc oil cooler described which provides between the base plate and the bottom plate a reinforcing plate, which is provided with a border of the bottom plate enclosing board.

This solution has proved to be particularly safe, but can still be improved.

The object of the invention is to provide a stacked-disk cooler, which is comparatively easy to manufacture and yet has sufficient stability. In particular, a stacked-disk cooler in the region of the lowermost plate and the base plate should be comparatively simplified to produce and still have sufficient stability. Next, an advantageous use of the stacked-disk cooler and an advantageous internal combustion engine with a stacking disk cooler to be specified.

With regard to the stacked-disk cooler, the object is achieved by the invention with a stacked-disk cooler of the type mentioned, in which according to the invention the features of the characterizing part of claim 1 are provided.

The invention is based on the consideration that a trough-shaped plate of the stacked-disk cooler, both with regard to loads from the inside and the outside of the cooler, is relatively susceptible in the transition region to its upstanding edge. Due to the interleaved, spaced stacked plates of the stacking disk cooler, the majority of the plates support each other. The invention has recognized that the above-mentioned problem, in particular in the region of the lowermost plate, occurs at the transition to the base plate, since an underlying trough-shaped plate, as in the upper region of the stacked-plate cooler, is missing. On the other hand, the invention has recognized that a reinforcing plate - as in the prior art - can basically be saved if the base plate is designed as such in an improved manner. Accordingly, the concept of the invention provides that a lowermost of the number of well-shaped plates is fixed directly on the base plate. This saves a reinforcement plate - this simplifies both the manufacturing process and the cost of the manufacturing process, as well as the cost of the stacked-plate cooler. The base plate formed according to the concept of the invention has a recess in the base plate main plane, wherein the lowermost plate is inserted in the recess and joined by means of a joint connection. The invention has recognized that a base plate has sufficient strength to be additionally provided with a depression can, without affecting the function of the base plate. Surprisingly, the invention thus utilizes the function of the base plate in a synergetic manner as a support of the stacking disk cooler and also as a support of the lowermost plate, in particular in the region of the upstanding edge.

As such, the stacked plate cooler is designed for heat exchange between a first fluid and a second fluid. In an advantageous oil cooler, the first fluid to be cooled is an oil, preferably an engine oil of an internal combustion engine or the like. The second cooling fluid is advantageously a coolant, such as water or the like. The core of the heat exchanger is formed by the number of trough-shaped plates for the separate and heat exchanging guidance of the first and second fluids, wherein a number of flow channels through which the first and second fluids flow are formed by the adjacent hollow chambers of the spaced-apart and joined plates.

The core of the heat exchanger can be arranged in a housing. In this form, a heat exchanger block of the stacked-plate cooler is advantageously provided with connections for the first fluid and the second fluid for guiding the same, advantageously in alternating sequence of adjacent flow channels.

Further advantageous developments of the invention can be found in the dependent claims and specify in particular advantageous ways to implement the above-mentioned concept within the scope of the task and with regard to further advantages.

The bottom plate of the number of trough-shaped plates has a bottom with a bottom contour designed as needed. The bottom contour essentially forms the outer boundary of the plate. Accordingly, it has proved to be advantageous that the bottom contour corresponds exactly to a contour of the recess in the base plate. The plate is thus already held by the recess edges already fit.

Next, the bottom plate advantageously has a bottom, which - in cross section - merges in a radius of curvature in the upstanding edge. It has been recognized in a particularly preferred development that there is a gap in the region of the radius of curvature between an outer edge of the lowermost plate and a recess surface of the recess of the base plate when the lowermost plate is inserted into the recess. The concept of the development provides that a joint connection for fastening the lowermost plate in this position can be used particularly advantageously in order to stabilize the lowermost plate, in particular in the region of the radius of curvature and into the region of the raised edge. For this purpose, the development provides that the intermediate space is filled with a joining agent of the joint connection. In a particularly preferred manner has been shown that this - in supervision - in a radius range of the bottom contour makes sense. Provided with advantage is a joint connection arranged in the radius range.

In a further preferred manner, it is provided that a joining means of the joint connection projects beyond the base plate main plane in a joining maleiscus. As a result, an increased stability of the lowermost plate can be continued, even surprisingly, even into the upstanding edge region. Overall, the concept of the invention can be realized in a particularly advantageous manner together with the further forming joint connection.

Preferably, the joint connection is formed in the form of a solder joint. In principle, however, other joint connections, such as a welded joint or the like, can be used. A solder joint has the advantage that it can be formed together with the other solder joints of the stacking disk cooler. A joining connection in the form of an adhesive bond has proven to be particularly advantageous. This can be realized very easily.

The recess of the base plate main plane is advantageously embossed in the base plate. An impression in the base plate can be comparatively simple and yet represent needs and versatile. In principle, however, other production methods for deepening, z. As a milling process or other ablative method for forming the recess.

Provided with advantage is a plate, in particular the bottom plate, if necessary. Also provided the base plate in the region of the bottom with a bottom profile. The profile can advantageously support the heat exchange or a heat dissipation from an adjacent cavity or flow channel of the radiator. The profile can also perform hold functions. There may also be provided a number of turbulence-generating elements. For heat exchange flow guidance of the first and / or second fluid, for example, soil profiles in wave or rib shape or a suitable corrugated pattern, z. B. the zig-zag shape. These can influence the flow guidance in order to increase the heat transfer by convection or turbulence or the like. This also applies to the bottom plate and the recess in the base plate.

Following the concept of the invention, a particularly preferred embodiment provides that the base plate is flat. In particular, the base plate may advantageously be rimless. This results in an advantageous material saving and a cost reduction.

The invention leads to the solution of the problem in an advantageous manner to a use of the stacked disk cooler as oil cooler. As an oil cooler, the stacking disk cooler is particularly suitable for cooling engine oil and / or gear oil. As a motor oil cooler, the stacking disk cooler is mounted in a particularly advantageous manner directly on an engine block of an internal combustion engine. Accordingly, the concept of the invention for solving the problem also leads to an internal combustion engine with a stacked disk cooler. The stacking disk cooler is advantageously attached to the base plate directly on the engine block, for example via a screw or other suitable connection.

Embodiments of the invention will now be described below with reference to the drawing. This is not necessarily to scale the embodiments, but the drawing, where appropriate for explanation, executed in a schematized and / or slightly distorted form. With regard to additions to the teachings directly recognizable from the drawing reference is made to the relevant prior art. there It should be understood that various modifications and changes may be made in the form and detail of an embodiment without departing from the general spirit of the invention. The disclosed in the description, in the drawing and in the claims features of the invention may be essential both individually and in any combination for the development of the invention. In addition, all combinations of at least two of the features disclosed in the description, the drawings and / or the claims fall within the scope of the invention. The general idea of the invention is not limited to the exact form or detail of the preferred embodiment shown and described below or limited to an article which would be limited in comparison to the subject matter claimed in the claims. For the given design ranges, values within the stated limits should also be disclosed as limit values and be arbitrarily usable and claimable. For simplicity, the same reference numerals are used below for identical or similar parts or parts with identical or similar function.

Further advantages, features and details of the invention will become apparent from the following description of the preferred embodiments and from the drawing; this shows in:

1 a schematic view of a stacked disc oil cooler to explain the basic structure;

2 FIG. 4 is a side sectional view of a preferred base plate as used in a stacked disc oil cooler. FIG 1 to implement a preferred embodiment according to the concept of the invention can be used - in view (B), the base plate is shown as a plan view;

3 : an enlarged, schematic representation of the detail D of 2 (A) ;

4 : one in 2 B) shown embodiment of a base plate with an inserted bottom plate, as in a stacked disc oil cooler of 1 can be used to implement an embodiment according to the concept of the invention;

5 an exploded view of a preferred core of a preferred embodiment of a stacked-disk cooler according to the concept of the invention.

1 shows a stacked disc oil cooler 10 ' with a block 1 whose core consists of spaced-apart, trough-shaped plates 2 is constructed, their edges 2a overlap each other and are soldered, and wherein the core in a housing 3 of the block 1 of the stacked disc oil cooler 10 ' is arranged. For details regarding the basic structure of the stacked disc oil cooler 10 ' will also be on DE 19 711 258 C2 the applicant, the disclosure of which is incorporated by reference herein in the disclosure of the present application. Between two adjacent plates 2 become hollow chambers in this way 4 formed alternately by the participating in the heat transfer media - namely a first fluid to be cooled 5.1 in the form of an engine oil and a second cooling fluid 5.2 in the form of cooling water - are flowed through. Thus, according to the flow directions indicated by arrows, the first fluid occurs 5.1 in the form of the engine oil to be cooled through an inlet connection 6 in the stacking disc oil cooler 10 ' in and through an outlet nozzle 7 out again. The second fluid 5.2 - In this case, an engine coolant in the form of cooling water - occurs through a hole not shown in the engine block in 2 B openings shown in detail 8th . 9 in the stacking disc oil cooler 10 ' in and out. In an application-appropriate manner, to realize a heat transfer between the engine oil and the cooling water each adjacent hollow chambers 4 perfused by engine oil or cooling water. In a known manner, all of a first fluid 5.1 flowed through chambers with respect to the inlet of the second fluid 5.2 separated, so in the block 1 a separate and heat exchanging leadership of the first and second fluid 5.1 respectively. 5.2 is realized.

The base plate 20 ' of the 1 has a circumferential edge 21 for holding the block 1 as well as to the side protruding tab areas 22 for receiving connecting means not shown for attachment to the engine block of an internal combustion engine, not shown.

2A shows a executed according to the concept of the invention base plate 20 on which the block 1 can be put on. The base plate 20 is in 2A in a side cross-sectional view in a modified form as a flat base plate without edge and tab. In the in 2A illustrated embodiment according to the concept of the invention, the base plate 20 in the base plate main plane 23 a depression 24 on that in 2 B in plan view of the base plate 20 can be seen. The lowest plate 12 of the stacked disc oil cooler 10 in this embodiment, following the concept of the invention in the recess 24 be used and - as out 3 with the enlarged detail D of the 2A visible - be joined with a joint connection F.

To use a in 2 Trough-shaped plate shown in more detail 12 this one has a floor 13 with a bottom contour 14 on, the perfect fit of a contour 25 the depression 24 equivalent. This is the depression 24 in the base plate main plane 23 in the base plate 20 imprinted.

The base plate 20 is in her, the recess 24 surrounding, border area 26 at mounting points with holes 28 provided by which screw can be introduced to the base plate 20 To mount, for example, on an engine block of an internal combustion engine. In addition, in the field of deepening 24 a material recess 27 intended. The material recess 27 has the advantage that, during the embossing process, excess material volume can escape into the material recess. This will make the fit of the contour 25 guaranteed.

3 shows the detail D at a base plate 20 with one opposite the base plate main plane 23 lowered depression 24 , In the depression 24 is the lowest trough-shaped plate 12 is inserted and joined by means of a joint connection F. The lowest plate 12 has a floor 13 with a recognizable in plan view bottom contour 14 , The floor contour 14 - what a 3 is shown by way of example - is in plan view essentially through a the ground 13 surrounding course of the radius of curvature 16 between the ground 13 and the upstanding border 15 the trough-shaped plate 12 certainly. In the area of the radius of curvature 16 is a space filled by the joint F between a peripheral edge 17 the lowest plate 12 and a pit surface 18 realized. This will be in the range of the radius of curvature 16 through the formation of the joint meniscus 19 above the base plate main plane 23 also in the area of the upstanding edge 15 a stabilization of the lowest trough-shaped plate 12 is reached. The stabilization is directed in particular against attacking transverse forces Q1, which by an internal pressure of the first fluid 5.1 or second fluids 5.2 can be generated and / or against lateral forces Q2, which by lateral accelerations at shocks of the stacked disc oil cooler 10 can arise on an engine block.

4 shows an arrangement of 3 in plan view consisting of the base plate 20 and an inserted bottom pan-shaped plate 12 , This is the precise adaptation of the ground contour explained above 14 the lowest plate 12 in terms of the contour 25 the depression 24 seen. The floor contour 14 the lowest plate 12 in this case has a radius range 11 in which the stabilization through the joint F is particularly effective. In a very simple embodiment, not shown here, the joint can possibly. On the radius range 11 restrict.

The lowest trough-shaped plate 12 is present on its floor with a bottom profiling 31 provided, which serves, in a hollow chamber 4 flowing fluid 5.1 or - depending on use - 5.2 to guide so that a heat exchange is optimized. The soil profiling 31 For example, it can also be supplemented by turbulence-generating elements in a hollow chamber 4 , Also, with the openings 6 . 7 . 8th . 9 the bottom plate 20 partially overlapping openings 36 . 37 . 38 . 39 the lowest trough-shaped plate 12 recognizable. These are flexibly attachable as required and still allow a passage of a fluid 5.1 . 5.2 through the base plate into a hollow chamber 4 ,

5 shows by way of example in an exploded view, the Kassetierung a core in a block 1 of the stacking disk cooler 10 with base plate 20 according to a preferred embodiment. Here, identical or similar parts or parts identical or similar function for the sake of simplicity with the same reference numerals as in 1 Mistake. Basically, the structure of the stacking disc cooler 10 the structure of the stacking disc cooler 10 ' , In the present preferred embodiment of the stacked disk cooler 10 is the base plate 20 instead of the base plate 20 ' provided according to the concept of the invention, so that the bottom plate 12 simple and yet safely stabilized is used.

Unlike the in 2 B shown base plate 20 is present in the 5 shown base plate 20 with a number of three expansion joints 27 provided - this in turn by the embossing process for the depression 24 to absorb resulting excess volume of material.

The exploded view of the 5 indicates that when the stacked disc oil cooler ceases 10 the lowest trough-shaped plate 12 directly into the depression 24 the base plate 20 used and can be added there; and together with the other trough-shaped plates 2 of the block 1 and a cover 40 , The block 1 can (here without housing shown), if necessary, in a between cover plate 40 and base plate 20 arranged housing 3 as it is for example in 1 is presented.

• – eine Anzahl von wannenförmigen Platten 2 mit einem hochstehenden Rand 15, wobei die Platten 2 zur Bildung von benachbarten Hohlkammern 4 mit dem Rand 15 ineinander liegend auf Abstand gestapelt und gefügt sind; und
• – eine Grundplatte 20 mit einer Grundplattenhauptebene 23; wobei eine unterste der Anzahl von wannenförmigen Platten 12 an der Grundplatte 20 angebracht ist. Erfindungsgemäß ist dabei vorgesehen, dass eine unterste der Anzahl von wannenförmigen Platten 12 unmittelbar auf der Grundplatte 20 befestigt ist, wobei die Grundplatte 20 in der Grundplattenhauptebene 23 eine Vertiefung 24 aufweist und die unterste Platte 12 in der Vertiefung 24 eingesetzt und mittels einer Fügeverbindung F gefügt ist.

In summary, the invention relates to a stacked disk cooler 10 , in particular oil cooler, for an internal combustion engine, comprising:

• - a number of trough-shaped plates 2 with a raised edge 15 , where the plates 2 for the formation of adjacent hollow chambers 4 with the edge 15 stacked one inside the other at a distance and joined; and
• - a base plate 20 with a base plate main plane 23 ; wherein a lowest of the number of trough-shaped plates 12 at the base plate 20 is appropriate. According to the invention, it is provided that a lowest of the number of trough-shaped plates 12 directly on the base plate 20 is attached, with the base plate 20 in the base plate main plane 23 a depression 24 and the bottom plate 12 in the depression 24 used and joined by means of a joint connection F.

LIST OF REFERENCE NUMBERS

1

block

2

plates

2a

margins

3

casing

4

hollow chambers

5.1

first fluid

5.2

second fluid

6

Entry port, openings

7

Outlet, openings

8th

openings

9

openings

10 ', 10

Stacked-plate oil cooler

11

radius area

12

lowest trough-shaped plate

13

ground

14

ground contour

15

upstanding edge

16

radius of curvature

17

outer edge

18

well surface

19

Add meniscus

20 ', 20

baseplate

21

edge

22

Tab areas, tab

23

Baseplate main level

24

deepening

25

contour

26

border area

27

Material recess, expansion joints

28

drilling

31

bottom profiling

36

openings

37

openings

38

openings

39

openings

40

cover plate

D

detail

F

Retaining compound

Q1

transverse forces

Q2

transverse forces

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0623798 A2 [0002]
• DE 19711258 C2 [0003, 0026]

Claims (13)

Stacking disc cooler ( 10 ), in particular oil coolers, for an internal combustion engine, comprising: - a number of trough-shaped plates ( 2 ) with a raised edge ( 15 ), the plates ( 2 ) to form adjacent hollow chambers ( 4 ) with the edge ( 15 ) are stacked and spaced one inside the other; and - a base plate ( 20 ) with a base plate main plane ( 23 ); wherein a lowest of the number of trough-shaped plates ( 12 ) on the base plate ( 20 ) is attached; characterized in that a lowest of the number of trough-shaped plates ( 12 ) directly on the base plate ( 20 ), the base plate ( 20 ) in the base plate main plane ( 23 ) a recess ( 24 ) and the lowest plate ( 12 ) is inserted in the recess and joined by means of a joint connection (F). Stacking disc cooler ( 10 ) according to claim 1, characterized in that the lowest plate ( 12 ) a floor ( 13 ) with ground contour ( 14 ), which fits perfectly to a contour ( 25 ) of the depression ( 24 ) corresponds. Stacking disc cooler ( 10 ) according to claim 1 or 2, characterized in that the lowest plate ( 12 ) a floor ( 13 ), which in a radius of curvature ( 16 ) in the upright border ( 15 ), and wherein in the region of the radius of curvature ( 16 ) a gap between an outer edge ( 17 ) of the lowest plate ( 12 ) and a recessed surface ( 18 ) is filled by a joining means of the joint connection (F). Stacking disc cooler ( 10 ) according to any one of claims 1 to 3, characterized in that a joining means of the joint (F) in a joint ( 19 ) over the base plate main plane ( 23 protrudes). Stacking disc cooler ( 10 ) according to one of claims 1 to 4, characterized in that a bottom contour ( 14 ) of a soil ( 13 ) of the lowest plate ( 12 ) a radius range ( 11 ) and has a joint (F), in particular joint ( 19 ), in the radius range ( 11 ) is arranged. Stacking disc cooler ( 10 ) according to one of claims 1 to 5, characterized in that the joint connection (F) is a solder joint. Stacking disc cooler ( 10 ) according to one of claims 1 to 6, characterized in that the joint connection (F) is an adhesive bond. Stacking disc cooler ( 10 ) according to one of claims 1 to 7, characterized in that the depression ( 24 ) in the base plate ( 20 ) is imprinted. Stacking disc cooler ( 10 ) according to one of claims 1 to 8, characterized in that the depression ( 24 ) in the base plate ( 20 ) is milled. Stacking disc cooler ( 10 ) according to one of claims 1 to 9, characterized in that one plate of the number of plates ( 2 ), in particular the lowest plate ( 12 ), preferably all plates ( 2 . 12 ) a floor ( 13 ) with soil profiling ( 31 ), and / or in a hollow chamber ( 4 ) is arranged a turbulence generating element. Stacking disc cooler ( 10 ) according to one of claims 1 to 10, characterized in that the base plate ( 20 ) is flat, in particular free of an edge. Using the stacking disc cooler ( 10 ) according to one of claims 1 to 10 as an oil cooler, in particular for cooling engine oil and / or gear oil. Internal combustion engine with a stacking disk cooler ( 10 ) according to one of claims 1 to 11.

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