EP2295916A2 - Stacked plate cooler, use of same and combustion engine with a stacked plate cooler - Google Patents

Abstract

The stacked disk-radiator (10) has multiple tub-shaped plates (12) directly fastened on a base plate (20), where the base plate has a recess (24) in the base plate main level (23). A lowest plate is inserted in the recess and is added by an adding connection.

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 Stapeischeiben cooler.

Stapeischeiben - cooler - the aforementioned type are, for example, as 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 in the 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 that stability a Stapefscheiben-cooler, especially in the lower area, and to ensure a secure operation.

In DE 197 112 58 C2 The Applicant is to a Stapeischeiben-Olkühler described which provides between the base plate and the bottom plate erne reinforcing plate, which is provided with a bordering the edge of the bottom plates 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 simpler to produce and yet has sufficient stability. In particular, a stacked-disk cooler in the region of the bottom 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 Stapeischeiben cooler should be specified.

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

The invention is based on the consideration that a trough-shaped plate of the stacked-plate cooler, both in terms of loads from the inside and the outside of the radiator, in the transition region to its upstanding edge is relatively vulnerable. Due to the interleaved, spaced-apart plate of the stacking disk cooler, the majority of the plates support each other. The invention has recognized that the above-mentioned problem escapes at the transition to the base plate, in particular in the region of the lowermost plate, since an underlying trough-shaped plate, as in the upper region of the slice disc cooler, is missing. On the other hand, the invention has recognized that a reinforcing plate as in the prior art - can be saved in principle, if the base plate is carried out 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 in accordance with the concept of the invention has a depression in the base flat-top plane, with the lowermost plate being inserted into the depression and being 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 stacked-disk radiator 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 adapted 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 separate and heat exchanging guidance of the first and second fluids, with a number of flow channels through which the first and second fluids flow through 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-disk 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 subclaims and specify in detail advantageous possibilities to realize the above-described concept within the scope of the problem as well as 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 proven to be distributive that the bottom contour corresponds precisely to a contour of the depression in the base plate. The plate is thus already held by the recess edges already fit.

Next, the bottom plate has advantageously 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 envisages 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 upstanding edge in that the intermediate space is filled with a joining means of the joint connection, in a particularly preferred manner has been shown that this - in supervision in a radius range 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 joining connection projects beyond the base plate main plane in a joining maleiscus. As a result, surprisingly, an increased stability of the lowermost plate can be continued even up to the high-order edge region. Overall, the concept of the invention can be implemented 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. It has also proven particularly advantageous to have a joint in the form of an adhesive bond. 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 the depression, e.g. a milling method or other protruding methods 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 Wärmeabieitung 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 exchanging flow guidance of the first and / or second fluid are, for example, soil profiles in wave or rib shape or a suitable corrugated pattern, such as 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 basically also applies to the lowest plate and to 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 stacking disk cooler as an oil cooler, as oil cooler, the stacked-plate 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 stacked disk cooler is distributed with the base plate directly mounted 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. It should be noted that various modifications and changes concerning the form and detail of an embodiment can be made without departing from the general idea 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 object that would be limited compared 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.

Fig. 1

eine schematische Ansicht eines Stapelscheiben-Ölkühlers zur Erläuterung des grundsätzlichen Aufbaus;

Fig. 2:

eine seitliche Schnittansicht einer bevorzugten Grundplatte, wie sie bei einem Stapelscheiben-Ölkühler der Fig. 1 zur Realisierung einer bevorzugten Ausführungsform gemäß dem Konzept der Er- findung eingesetzt werden kann - in Ansicht (B) ist die Grundplat- te als Draufsicht gezeigt,

Fig. 3:

eine vergrößerte, schematische Darstellung des Details D der Fig. 2 (A);

Fig. 4:

eine in Fig. 2 (B) gezeigte Ausführungsform einer Grundplatte mit einer eingesetzten untersten Platte, wie sie bei einem Stapel- scheiben-Ölkühler der Fig. 1 zur Realisierung einer Ausführungs- form gemäß dem Konzept der Erfindung eingesetzt werden kann;

Fig, 5

eine Explosionsdarstellung eines bevorzugten Kerns einer bevor- zugten Ausführungsform eines Stapelscheiben-Kühlers gemäß dem Konzept der Erfindung.

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:

Fig. 1

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

Fig. 2:

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

3:

an enlarged, schematic representation of the detail D of Fig. 2 (A) ;

4:

one in Fig. 2 (B) shown embodiment of a base plate with a bottom plate inserted, as in a stacked disc oil cooler of Fig. 1 for implementing an embodiment according to the concept of the invention can be used;

Fig. 5

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

Fig. 1 shows a stacked disc oil cooler 10 'with a block 1, whose core is constructed of spaced-apart stacked trough-shaped plates 2, the 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 10th 'is arranged. For details regarding the basic structure of the stacked disc oil cooler 10 'is also 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 respective adjacent plates 2 hollow chambers 4 are formed in this way, which are alternately of the involved in the heat transfer media - namely a first fluid to be cooled 5.1 in the form of a motor oil and a second cooling fluid 5.2 in the form of cooling water - flows through. Thus, according to the flow directions indicated by arrows, the first fluid 5.1 in the form of the engine oil to be cooled enters through an inlet connection 6 into the stacking plate oil cooler 10 'and out again through an outlet connection 7. The second fluid 5.2 - in the present case an engine coolant in the form of cooling water passes through a bore, not shown in the engine block by in Fig. 2B shown openings 8, 9 in the Stapeischeiben oil cooler 10 'on and off. In an application-related In an appropriate manner, in order to realize a heat transfer between the engine oil and the cooling water, respectively adjacent hollow chambers 4 are flowed through by engine oil or cooling water. In this case, in a known manner, all chambers through which a first fluid 5.1 flows are separated relative to the inlet of the second fluid 5.2, so that in block 1 a separate and heat-exchanging guidance of the first and second fluids 5.1 or 5.2 is realized.

The base plate 20 of the Fig. 1 has a peripheral edge 21 for supporting the block 1 and to the side protruding tab portions 22 for receiving connecting means not shown for attachment to the engine block of an internal combustion engine, not shown.

Fig. 2A shows a executed according to the concept of the invention base plate 20 on which the block 1 can be placed. The base plate 20 is in Fig. 2A in a side cross-sectional view in a modified form as a flat base plate without edge and tab. In the in Fig. 2A In the illustrated embodiment according to the concept of the invention, the base plate 20 in the base plate main plane 23 a recess 24 which in Fig. 2B can be seen in plan view of the base plate 20. The lowermost plate 12 of the Stapelscheiben-Ölkühters 10 can be used in this embodiment according to the concept of the invention in the recess 24 and - as shown Fig. 3 with the enlarged detail D of the Fig. 2A visible - be joined with a joint connection F.

To insert a in Fig. 2 Trough-shaped plate 12 shown in more detail, this has a bottom 13 with a bottom contour 14, which corresponds exactly to a contour 25 of the recess 24. For this purpose, the recess 24 is embossed in the base main plane 23 in the base plate 20.

The base plate 20 is provided in its surrounding the recess 24, edge region 26 at mounting points with holes 28 through which screw connections can be introduced to mount the base plate 20, for example on an engine block of an internal combustion engine. In addition, a Materiaiausnehmung 27 is provided in the region of the recess 24. The material recess 27 has the advantage that, during the embossing process, excess material volume can escape into the material recess, thereby ensuring the accuracy of fit of the contour 25

Fig. 3 shows the detail D at a base plate 20 with respect to the base plate main plane 23 lowered recess 24. In the recess 24, the lowermost trough-shaped plate 12 is inserted and joined by means of a joint connection F. The bottom plate 12 has a bottom 13 with a recognizable in plan view bottom contour 14. The bottom contour 14 - which in Fig. 3 is shown by way of example - is determined in plan view essentially by a surrounding the bottom 13 course of Krummungsradius 16 between the bottom 13 and the upstanding edge 15 of the trough-shaped plate 12. In the region of the radius of curvature 16, a gap filled by the joint F between an outer edge 17 of the lowermost plate 12 and a recess surface 18 is realized. As a result, stabilization of the lowermost trough-shaped plate 12 is achieved in the region of the radius of curvature 16 by forming the joint maleiscus 19 above the base tattoo main plane 23 even in the region of the upstanding edge 15. The stabilization is directed in particular against attacking transverse forces Q1, which can be generated by an internal pressure of the first fluid 5.1 or second fluid 5.2 and / or against transverse forces Q2, which may be caused by lateral accelerations at vibrations of the Stapeischeiben oil cooler 10 on an engine block.

Fig. 4 shows an arrangement of Fig. 3 In plan view, consisting of the base plate 20 and an inserted lowest trough-shaped plate 12. From this, the above-explained accurate alignment of the bottom contour 14 of the bottom plate 12 with respect to the contour 25 of the recess 24 can be seen, the bottom contour 14 of the bottom plate 12 has a present Radius range 11, in which the stabilization through the joint F is particularly effective. In a very simple embodiment, not shown here, the joint connection can, if necessary, be limited to the radius region 11,

The lowest trough-shaped plate 12 is presently provided on its bottom with a bottom profiling 31, which serves to conduct in a hollow chamber 4 fluid 5.1 or - depending on use - 5.2 to perform so that a heat exchange is optimized. The bottom profiling 31 can also be supplemented, for example, by turbulence-generating elements in a hollow chamber 4. In addition, openings 36, 37, 38, 39 of the lowermost trough-shaped plate 12 can be seen with the openings 6, 7, 8, 9 of the bottom plate 20. These are flexibly attachable as needed and still allow a passage of a fluid 5.1, 5.2 through the base plate in a Hohlkamrner. 4

Fig. 5 shows by way of example in an exploded view, the Kassetierung a core at a block 1 of the stacked-plate 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 Fig. 1 Mistake. Basically, the structure of the stacked-plate cooler 10 corresponds to the structure of the stacked-plate cooler 10. In the present preferred embodiment of the stacked-plate cooler 10, the base plate 20 is provided instead of the base plate 20 'according to the concept of the invention, so that the lowermost plate 12 is simple and nevertheless safely stabilized is used.

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

The exploded view of the Fig. 5 shows that when Kassettenierung the stack-disk oil cooler 10, the lowest trough-shaped plate 12 can be inserted directly into the recess 24 of the base plate 20 and joined 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 arranged between cover 40 and base plate 20 housing 3, as for example in Fig. 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 wannenförmiger 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-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, wherein the plates 2 are stacked and joined to each other with the edge 15 to form adjacent hollow chambers 4; and
• a base plate 20 having a base plate main plane 23; wherein a lowermost one of the number of trough-shaped plates 12 is attached to the base plate 20. According to the invention, it is provided that a lowermost of the number of trough-shaped plates 12 is fastened directly to the base plate 20, the base plate 20 having a depression 24 in the base plate main plane 23 and the lowermost plate 12 inserted into the depression 24 and joined by means of a joint connection F. is.

LIST OF REFERENCE NUMBERS

1

block

2

plates

2a

margins

3

casing

4

hollow chambers

5.1

first fluid

5.2

second fluid

6

Einiriftsstutzen, 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

Claims (13)

Stacked disc radiator (10), in particular oil cooler, for an internal combustion engine, comprising: - A number of trough-shaped plates (2) having a raised edge (15), wherein the plates (2) for forming adjacent hollow chambers (4) with the edge (15) are stacked and joined in a spaced apart, and a base plate (20) having a base main plane (23); wherein a lowest of the plurality of trough-shaped plates (12) is attached to the base plate (20);
characterized in that
a bottommost of the plurality of trough-shaped plates (12) is mounted directly on the base plate (20), wherein the base plate (20) in the base plate main plane (23) has a recess (24) and the lowest plate (12) inserted in the recess and is joined by means of a joint connection (F). A stacking disk cooler (10) according to claim 1, characterized in that the lowermost plate (12) has a bottom (13) with a bottom contour (14) which precisely matches a contour (25) of the recess (24). A stacked-plate cooler (10) according to claim 1 or 2, characterized in that the lowermost plate (12) has a bottom (13) which in a radius of curvature (16) in the upstanding edge (15) and wherein in the region of the radius of curvature (16) a gap between an outer edge (17) of the lowermost plate (12) and a recess surface (18) is filled by a joining means of the joint (F). A stacking disk cooler (10) according to any one of claims 1 to 3, characterized in that a joining means of the joint connection (F) in a joint maleiscus (19) projects beyond the base plate main plane (23). A stacking disk cooler (10) according to any one of claims 1 to 4, characterized in that a bottom contour (14) of a bottom (13) of the bottom plate (12) has a radius region (11) and a joint connection (F), in particular joint ( 19), in the radius region (11) is arranged. Stacking disk cooler (10) according to one of claims 1 to 5, characterized in that the joint connection (F) is a solder joint. Stacking disk cooler (10) according to one of claims 1 to 6, characterized in that the joint connection (F) is an adhesive connection. A stacking disk cooler (10) according to any one of claims 1 to 7, characterized in that the recess (24) is embossed in the base plate (20). A stacking disk cooler (10) according to any one of claims 1 to 8, characterized in that the recess (24) is milled into the base plate (20). A stacking disk cooler (10) according to any one of claims 1 to 9, characterized in that a plate of the number of plate (2), in particular the lowermost plate (12), preferably all plates (2, 12) having a bottom (13) Floor profiling (31) has, and / or in a hollow chamber (4) is arranged a turbulence-generating element. A stacking disk cooler (10) according to any one of claims 1 to 10, characterized in that the base plate (20) is flat, in particular free from an edge. Use of the stacking disk 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 stacked-plate cooler (10) according to one of claims 1 to 11.

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