EP1478896A1

EP1478896A1 - Heat exchanger system

Info

Publication number: EP1478896A1
Application number: EP03742538A
Authority: EP
Inventors: Peter Prechtl
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-20
Filing date: 2003-02-19
Publication date: 2004-11-24
Anticipated expiration: 2023-02-19
Also published as: AU2003215566A1; DE10207116A1; DE50308790D1; ATE380992T1; DE10207116B4; EP1478896B1; WO2003071214A1

Abstract

The invention relates to a heat exchanger system (10) for exchanging energy between two liquids. Said system comprises an inner part (11) in the form of a heat exchanger comprising a stack of plates (13, 14) having exchanging channels for guiding the liquids, and openings (16, 17, 18, 19) which form distribution and collection guiding elements (21, 22, 23, 24) for both fluids through the stacked arrangement of the plates (13, 14), said guiding elements being essentially perpendicular to the exchanging channels. In a first part of the plates (13), the exchanging channels open up into the distribution guiding element (21) and into the collection guiding element (22) for the first liquid, and in a second part of the plates (14), the exchanging channels open up into the distribution guiding element (23) and into the collection guiding element (24) for the second liquid. Said system also comprises an outer part (12) for receiving the inner part (11), and lines (25, 26, 27, 28) for supplying and evacuating both liquids. Connections (29, 30, 31, 32) are established between the lines (25, 26, 27, 28) and the distribution and collection guiding elements (21, 22, 23, 24) when the inner part (11) is arranged in the outer part (12) in an operable position.

Description

heat exchanger system

description

The present invention is directed to a heat exchanger system with an inner part as a heat exchanger and an outer part for the up and downflow of the liquids.

Heat exchangers are used in a wide variety of technical fields, for example for cooling or heating units such as motors, in the area of heat pumps and in cooling systems, for example refrigerators or system cooling. Heat exchangers are known, for example, from DE 691 11 218 T2 or JP 08178575 A.

To enable efficient energy exchange, heat exchangers are often made from stacks of plates in which the liquids or other fluids flow through channels. The plates are arranged alternately, i.e. that the liquid to be cooled flows through every second plate and the cooling liquid through the other plates arranged between them. In this way, particularly efficient energy transmission can be achieved. The channels can be drilled in the plates in the transverse direction, for example, or grooves can be milled into the plates, so that when the plates are stacked, the undersides of adjacent plates serve as lids on the grooves and the channels are thereby formed.

The dimensions of the heat exchangers can be significantly reduced by using so-called microstructure technology. This technique uses, for example, the principles of chip manufacture and related techniques for manufacturing certain mechanical structures, such as corresponding etching processes or the like. The use of the finest milling tools or laser devices also belongs to the area of microstructure technology, if structures of comparable size can be achieved with it.

The arrangement of plates in a stack as a heat exchanger takes place, for example, by the crosswise (in each case rotated by 90 °) alignment of the alternating plates, so that a square stack is obtained which has channel opening fields on four sides. In order to enable the liquids to be fed in and out, connections must now be made to this stack. In the prior art, this is done by placing a type of cap on each of the channel opening surfaces, which leads in a funnel-like manner to an opening to which a line for supplying and removing the fluid is arranged. The caps of the different sides are partly housed in a common frame and thus firmly connected to each other. Such an arrangement, which is known in the prior art, is large and bulky in terms of its cooling capacity, since caps protrude on four sides, which are also connected to lines that have to be routed to the corresponding units. A major advantage of microstructure technology, namely its small dimensions, is thereby nullified or at least reduced. Furthermore, such cap arrangements of the prior art are susceptible to faults, particularly with regard to their tightness.

It is therefore the object of the present invention to provide a heat exchanger system which can compactly effect a tight heat exchange between two fluids.

This object is achieved by the provision of a heat exchanger system with the features according to independent claim 1. Further advantageous refinements, aspects and details of the present invention result from the dependent claims, the description and the accompanying drawings. The invention is based on the idea of providing a two-part system in which the channels and supply / discharge lines are integral in the first part, and the supply and discharge lines in a second part, with the two parts being plugged together or into one another Connections are made.

Accordingly, the invention is directed to a heat exchanger system for energy exchange between two fluids, which comprises:

an inner part as a heat exchanger with a stack of plates with exchanger channels for the passage of the fluids; and with breakthroughs, which form distribution and collection guides for both fluids due to the stacked arrangement of the plates, which are essentially perpendicular to the exchanger channels, the exchange channels opening into the distribution guide and collection guide for the first fluid and at a first portion of the plates a second portion of the plates open the exchanger channels into the distribution guide and collecting guide for the second fluid; and an outer part for receiving the inner part with lines for supplying and discharging both fluids, connections being made between the lines and the distribution and collecting guides when the inner part is received in the outer part in an operational position.

In the context of the invention, a fluid is to be understood as a liquid or a gas.

The exchanger channels are the areas in the plates that are used for the flow of the fluids. They lie in the plane of the plates (i.e. parallel to the largest areas of the plates). There are additional openings in the plates, which come to lie one above the other when the plates are stacked and form guides for the fluids. The arrangement of the exchanger channels in the plane of the plates creates these guides perpendicular to the channels. The guides are larger channels, which should be dimensioned so that they can receive the fluids in their flow. Since a heat exchanger uses two different fluids, namely one too Cooling and a fluid to be heated, a total of four of these guides are necessary for inflow and outflow. The distribution and collection guide of the first fluid are connected to the channel ends of the channels for the first fluid (usually by the channels simply ending at the edge of the openings), while the distribution and collection guide for the second fluid correspond to the channels for the second fluid are connected. The distribution guides serve to take the fluids from the supply lines and distribute them (as evenly as possible) over all channels, while the collection guides serve to collect the fluids flowing out of the channels again and to lead them to the discharge lines.

The outer part has two functions. On the one hand, it serves to hold the inner part as compact and fluid-tight as possible, and on the other hand to connect the lines integrated in the outer part to the guides of the inner part. Ideally, the inner part can simply be pushed into the outer part like a cartridge and closed. The necessary connections are created immediately by the insertion. The outer part can also be designed as part of a unit to be cooled, so that hose lines can be completely avoided.

For the purposes of the present invention, an operational position is understood to mean a relative spatial positioning of the inner part and outer part, in which fluids can be passed through the heat exchanger and an energy exchange can take place.

Various options are available for realizing the connections between the lines and the guides. It may be preferred that at least one of the lines is connected to the distribution or collecting guides via openings in the inner part. The opening (s) can be formed by recesses in the stacked plates. The recesses are realized in adjacent plates and can, for example, each have shapes that lead to an overall shape of the opening that is essentially hollow cylindrical. At the Such openings can be made most simply by drilling or milling a hole in the finished plate stack.

It is also possible that at least one of the lines is connected to a free end of the distribution or collecting guides. When the plates are stacked towards the inner part, if the plates arranged at the end of the stack have identically shaped recesses, guides are formed which have open ends. These ends can be closed with end pieces such as lids. The outer part can also be designed such that it can close the free ends when the inner part is inserted, for example by means of a base part and a cover. However, as described, in a preferred embodiment of the invention it is also possible to connect the lines of the outer part to the free ends of the guides. This can be done for example by means of adapters or by the special design of the base part and cover of the outer part. In a simple embodiment, in which all guides at the free ends to the

Cables are connected, it is even possible to reduce the outer part to the bottom and lid, which leads to a particularly simple structure. With the implemented four guides for the inlet and outlet of two fluids, a maximum of eight free ends are available that can be used to connect lines.

Both embodiments can be combined with one another. For example, it is possible to place the connections for one of the liquids at the open ends on one side of the plate stack and for the other liquid to provide lateral bores on the inner part which break through to the other guides. It is also possible to provide only either the inlet or the outlet of a liquid through a side opening in the stack, while the other connection, that is to say the outlet or inlet, is realized at one of the open ends. As mentioned above, it is possible to implement the outer part only as a set of cover and bottom. As a rule, however, it will be preferred that the outer part is a housing which encloses the inner part on several or all sides. In this way, the outer part can be designed to be particularly fluid-tight, and it achieves better options for routing the cable compared to the simple solution with the lid and base part.

For example, it is possible for the lines to be routed around the inner part as annular or partially annular circulation channels in the housing. Such circulation channels can have problems known from the prior art

Hose lines etc. eliminate completely. They are simple to manufacture and allow a compact construction of the heat exchanger system, in which, for example, all lines can be led out on one side of the housing.

In a particularly preferred embodiment of the invention, the circulation channels are designed as grooves in an inner wall of the housing, the inner part being in an operational position so that it closes the grooves. In this way, the grooves only have to be milled or otherwise introduced into an inner wall of the outer part that comes into contact with the inner part (especially the outer wall). Standard tools can be used for this. This construction is particularly simple to manufacture.

In order to ensure fluid tightness both to the outside and to the individual channels with one another, it is advantageous if the best possible fit is produced between the inner wall of the outer part and the outer wall of the inner part. However, this requires a higher manufacturing effort, especially if the outer and inner parts are not to be produced in a set, but individually and interchangeably. Alternatively, it is also possible for sealing rings to be arranged on the inner wall between the grooves. These are easy to attach (by additionally milling grooves for these O-rings) and allow a good seal between the individual lines.

As is also customary, the plates can be arranged in a stack in such a way that the exchange channels of the plates alternately serve to pass the first and second liquids. Each second plate thus serves for the passage of the first liquid, the other plates arranged between them for the passage of the other liquid.

When viewed on the main surfaces, the plates can have different shapes, for example rectangular, square, trapezoidal or polygonal. The shape can be adapted to the spatial conditions in the units in which the heat exchanger system according to the invention is to be installed, provided that an integral installation is provided. The variability of the shape of the plates is only limited by the need to arrange the exchange channels in a sensible manner and to have enough space to realize the openings for the guides of the liquids.

In a preferred embodiment, the plates are circular and consist of a square central area with the exchanger channels and a ring area connected at the corners of the central area, four openings being cut out between the ring and the central area to form the distribution and collecting guides. In this embodiment, a quasi-square (with the exchanger channels) is inserted into a ring, the outside of which is somewhat larger than the square and the inside of which is somewhat smaller, so that the square overlaps with the ring. A total of four recesses are formed between the sides of the square and the inner sides of the ring opposite these, which are used as guides when stacked.

There are also various options available for shaping the entire stack. The easiest way is to lay the panels on top of each other so that the stack of plates is essentially columnar, the shape of the column resulting from the shape of the individual plates. However, it is also possible to arrange the plates somewhat offset, for example, so that inclined stacks result. The specific design depends on the requirements with regard to use, space requirements and costs etc.

The heat exchanger system according to the invention can further be characterized in that the exchanger channels and / or recesses in the plates are manufactured or can be produced using microstructure technology. Depending on the thickness or size of the plates, a microstructure technique can be used to manufacture the channels and / or recesses. It is also possible to produce the plates in mixed processes, in which, for example, the channels are produced as microchannels using microstructure technology, but the cutouts are simply punched out in order to reduce the costs of plate production.

Especially when using plates made in microstructure technology, the channels are so small that a flow of oil, for example, cannot be guaranteed under all operating conditions. At low temperatures, such an oil may become so viscous that the forces acting in the channels are too great to still allow passage. In order to avoid an overpressure in the pressure area of the heat exchanger system, it can therefore be advantageous that a pressure relief valve is arranged on the heat exchanger system, which is connected in parallel with the distribution guide and the collector guide of one of the liquids (for example an oil which is viscous at low temperatures). The parallel connection is such that the pressure relief valve is either connected to the supply line or to the distribution guide and opens from a certain pressure in this area. A channel leads from the pressure relief valve to the discharge line or to the collecting line for this liquid. The channel is dimensioned so that it can in any case pass the liquid. Spatially, such a pressure relief valve can either be assigned to the inner part or to the outer part. As already indicated, the heat exchanger system according to the invention can be designed to be particularly compact due to the fact that there is no need for pipes or hoses. In particular, this makes it possible for the first time that the outer part is an integral part of a functional block. A functional block is to be understood here to mean any unit that is designed as a "monolithic" compact unit and, due to its mode of operation, requires a heat exchanger. The outer part can be embedded in such a block, so that any liquid lines inside the block open directly into the outer part and can thus be connected directly to the inner part. in the

In extreme cases, the outer part is nothing more than a cavity in the functional block to which the lines with the liquids lead.

Such a functional block can be, for example, an engine block of an internal combustion engine. In this case e.g. the connections for the engine oil to be cooled are located directly on the side wall of the inner part, while the connections for the coolant are provided at free ends of the other guides in order to lead the coolant via a pipe or hose system to the heat exchanger and from there to the radiator.

A common field of application for heat exchangers is the cooling of lubricants. It is therefore preferred that the first fluid is an oil and the second fluid is a cooling medium, for example water or a water-based cooling medium. If the heat exchanger is used to heat lubricants, the second fluid is preferably a corresponding heating medium.

Various materials can be used for the heat exchanger systems according to the invention, in particular the exchanger channel walls, such as plastics, metals or ceramics. In particular, materials with a high thermal conductivity, such as metals, are preferred for a heat exchanger system. Metals can be, for example Aluminum, iron, copper, gold, or other sufficiently workable and thermally conductive metals.

In the following, the invention will be explained in more detail with reference to specific embodiments, reference being made to the accompanying drawings, in which the following is shown.

Fig. 1 shows the cross section of a heat exchanger system according to a first

Embodiment of the present invention, in which the connections are laterally on the inner part;

FIG. 2 shows the embodiment according to FIG. 1 in a perspective view, in which the outer part has been partially removed;

Fig. 3 shows the inner part of the first embodiment, in which the openings to the

Guides and the free ends can be seen; Fig. 4 shows an example of two of the plates used for the inner part and their successive sequence;

Fig. 5 shows a heat exchanger system according to a second embodiment of the present invention, in which the lines to the free ends of the guides in

Inner part are connected; 6 shows the course of the guides and the "X-ray display"

Terminals in the second embodiment of the present invention;

Fig. 7 shows the inner part of this embodiment in which the free ends can be seen; and

8 shows a heat exchanger system according to another embodiment of the present invention, which is a combination of the first and second

Embodiments.

The present invention provides cartridge-type heat exchangers as internal parts of the heat exchanger system according to the invention, in which the guides which serve to supply and discharge the fluids through the actual exchanger channels are already included as an integral part. Such one Heat exchanger system 10 is shown by way of example in FIG. 1. An inner part 11 is inserted into an outer part 12. The inner part 11, which represents the actual heat exchanger, consists of a stack of plates, as shown for example in FIG. 4. Shown in cross section is a distribution guide 21 formed in the plate stack and a collecting guide 22 for a first fluid. The outer part 12 has four lines 26, 27, 28, 29, which in the selected embodiment all begin on the same side of the outer part and serve to supply and discharge the two fluids. The lines are routed as circulation channels 33, 34, 35, 36 around the inner part 11, wherein these circulation channels are only designed as grooves in the inner wall 45 of the outer part 12 and theirs

Completion to channels only takes place through the outer wall 46 of the inner part 11 which is ready for use.

The supply line 27 is connected via the circulation channel 35 by means of a connection 31 (the spatial transition between line and opening) to an opening 39, which in turn establishes a connection to the distribution guide 21. The discharge line 28 for the same liquid is connected to the opening 40 and the collecting guide 22 via the circulation channel 36 and the connection 32. The circulation channel 32 is not absolutely necessary here, since the opening 40 lies directly on the line 28. However, it is also conceivable that all lines are at different locations than that

Openings so that circulation channels, possibly of different lengths, are always required for their connection. Otherwise, the symmetrical design of the circulation channels is more advantageous with regard to the force distribution and absorption, especially at higher pressures.

1 shows neither the guides 23, 24 for the other liquid nor the openings 37, 38 which connect them to the lines 25, 26 or the circulation channels 33, 34.

The flow of fluid through the piping system is illustrated in Fig. 1 by the arrows. The fluid, for example an oil, flows through line 27 which Circulation channel 35, and the opening 39 in the distribution guide 21, in which it is distributed before it flows through the exchanger channels (not shown) in the horizontal direction of FIG. 1 (from right to left). After passing through the Tauscherkan le, the fluid collects in the collecting guide 22, from where it leaves the heat exchanger system 10 according to the invention via the opening 40, possibly the circulation channel 36 and the line 28.

Overall, the following line systems result, represented by the reference symbols used:

Inlet 1st fluid: 27-35-31-39-21 Outlet 1st fluid: 22-40-32- (36) -28 Inlet 2nd fluid: 25-33-30-38-23 Outlet 2nd fluid: 24 -37-29-34-26

The inner part 11 is tightly fitted into the outer part 12. In order to avoid leakage between the ring channels 33, 34, 35, 36 or between the openings 37, 38, 39, 40 and the ring channels, sealing rings 53 are furthermore arranged between the circulation channels, which enable the channels to be sealed, even if the lid areas, which are formed by the outer wall 46 of the inner part 11, are not completely sealed.

The heat exchanger system 10 also has a pressure relief valve 49 which is accessible to the liquid via the distribution guide 21 (dashed arrow in FIG. 1). The pressure relief valve consists of a housing, one

Ball seal 50, which is pressed into the valve opening facing the fluid by means of the compression spring 51, and a valve channel 52, through which the fluid can flow directly into the collecting guide 22 when the ball seal 50 is opened and thereby bypasses the exchanger channels. The pressure relief valve 50 has the same diameter and the same cylindrical shape as the inner part 11, so that it can be inserted into the likewise cylindrical hollow form of the outer part. The connection to the inner part is made via two of the free ends of the guides 21, 22 of the inner part. Overpressure valve 50 and inner part 11 are held in position by means of a retaining ring 55.

The embodiment of a heat exchanger system according to the invention shown in FIG. 1 can be used excellently as an integral part in an assembly such as an engine block. So it is conceivable to design the entire outer part as part of a bog block, in which only a hole for receiving the inner part (with lines) is made.

To illustrate the three-dimensional relationships of this embodiment of the invention, a segment of the outer part 12 has been omitted in FIG. 2 in order to improve the view of the inner part 11. In addition, important elements that are hidden behind others are indicated as dashed lines. In the selected embodiment, the inner part 11 has a cylindrically curved outer wall 46. On the top of the cylinder which forms the inner part 11, the regions of the guides 21, 22 which reach the pressure relief valve 49 can be seen. The two other guides 23, 24 for the other fluid, which are not connected in parallel to the pressure relief valve 49, are not guided upwards, but are covered in the selected example by the lower region of the pressure relief valve 49. On the left, the lines 26, 27, 28, 29 for the two fluids are shown, which open into the circulation channels 33, 34, 35, 36 which are designed as grooves and which via openings 37, 38, 39, 40 with the inner part guides 21, 22, 23, 24 are connected by means of connections 29, 30, 31, 32. The connections are again not physical objects, but spatial zones of the transition of the openings in the inner part 11 to the lines in the outer part 12.

Fig. 3 shows the inner part 11 without outer part 12 and pressure relief valve 49. The cylindrical shape of the inner part 11 leads to crescent-shaped distribution and Collection guides 21, 22, 23, 24, the edges of which are formed by the inside of a ring which is guided around the outside of the exchanger channel stack and by the edges of the exchanger channel stack, each of which contains those exchanger channels which are connected to the respective guide.

As already explained above, the inner part 11 consists of a stack of alternately arranged plates, in which the two liquids each flow through the exchanger channels in cross flow. 4 shows two such plates by way of example, which differ in the orientation of their channels. The upper plate 13 has an exchange channel field 15 and an annular region 20. There are two openings 16, 17 for the supply and discharge of the first fluid, and two further openings 18, 19 for the supply and discharge of the second fluid between the exchanger channel field 15 and the ring region 20. In plate 13, the exchanger channels (which are not shown in detail due to their small dimensions), which are designed as furrows or grooves in exchanger channel field 15, are connected at their ends to openings 16 and 17, thus serving to pass the first liquid , The lower plate 14 is rotated by 90 ° with respect to the upper plate 13, the exchanger channels being connected to the openings 18 and 19, which have not been rotated as well. The exchanger channels of this exchanger channel field 15 thus serve to pass the second fluid. As also shown in the illustration in FIG. 4, the individual plates can be positioned exactly in relation to one another when stacked by pins which are guided through small holes in the ring regions 20 in order to have smooth-walled walls in which the openings 16, 17 are stacked , 18, 19 result in guides 21, 22, 23, 24. The longitudinal edges of the exchanger channel fields 15 can be designed without exchanger channels in order to enable a better seal with respect to the guides located laterally from them.

A heat exchanger system according to a further embodiment of the present invention is shown in FIG. 5, in which the lines are connected to free ends of the guides. The same reference numerals designate identical elements 1 to 4. The inner part 11 is here, together with a pressure relief valve 49, inserted between the two connection covers 47 and 48 of the outer part. The connection cover 47 contains the supply line 27 and the discharge line 28 for the first fluid. The fluid is routed through lines in the pressure relief valve 49 to the free end 43 of the distribution guide 21, is distributed from the distribution guide 21 via the exchanger channels to flow through the heat exchanger, and is conducted into the collecting guide 22 at the other ends of the channels. From there, the first fluid leaves the collecting guide 22 via the free end 44 and in turn reaches the discharge line 28 via the pressure relief valve 49.

The second fluid is directed to the other end of the inner part 11 by connecting a connection cover 48 to the other side, as best seen in FIG. 6. The second fluid is fed via line 25 to the free end 41, where it reaches the distribution guide 23, from where it distributes into the exchanger channels. After flowing through the exchanger channels provided for it, it arrives in the collecting guide 24, from where it flows via the free end 42 of the discharge line 26. 6 again explains the spatial relationship of the various guides in the inner part and their relationship to the connection covers 47, 48 by means of a representation of the internal structures.

In order to avoid leakage of fluids from the free ends of the inner part 11 to which no lines are connected (every second in the embodiment presented), it can further be advantageous to attach an end plate to the ends of the plate stack. Such a measure is shown in FIG. 7, where an end plate 54 is placed on the stack and connected to it in a fluid-tight manner. In contrast to the other plates of the plate stack, the end plate 54 contains only two openings which leave the guides 21 and 22 free, but which close off the other two guides 23 and 24. A corresponding, further end plate (not shown) is arranged on the underside of the plate stack, which closes the other ends of the guides 21 and 22, but instead has openings which leave the ends of the guides 23 and 24 free. A combination of the two previously presented embodiments of the invention is shown in FIG. 8. Here, for example, the first fluid is fed to and removed from the heat exchanger via the free ends of the guides, while the second fluid is fed in and discharged via lateral openings.

Specifically, the supply line 27 of the first fluid is connected via connection 31 to the free end 43 of the distribution guide 21, while the collecting guide 22 is connected at its free end 44 via connection 32 to the discharge line for the first fluid. The second fluid reaches the distribution guide 23 via the feed line 25, the circulation channel 33 and the opening 38 (not shown, see FIG. 2), flows from there through the exchanger channels assigned to the second liquid and reaches the collecting guide 24, the opening 37, and the circulation channel 34 back into the discharge line 26. This embodiment is well suited, for example, if a fluid is supplied from outside an aggregate while the other fluid is circulating in the aggregate and the heat exchanger system can therefore be integrated directly into this aggregate. In the embodiment shown in FIG. 8, however, a pressure relief valve 49 is also provided, which corresponds in function to that of FIG. 5 and which can divert cold engine oil, for example. In this case, the embodiment shown in FIG. 8 would be an inversion of the principle of integrating an engine oil cooler into the engine block.

In the exemplary embodiments shown, the grooves for the circulation channels 35 and the seals 53 are provided in the outer part 12. It goes without saying that these grooves can of course also be formed in the inner part 11.

As stated in the introduction to the description, the described exemplary embodiments of a heat exchanger can be produced particularly advantageously using microstructure technology. In the context of the present invention, for example, microstructured channels are understood to be channels in which at least one of the dimensions channel height or channel width is in the submillimeter range, for example channel width = 5 mm, channel height = 200 μm or channel width = 300 μm and channel height = 200 μm, where these are purely exemplary values. LIST OF REFERENCE NUMBERS

10 heat exchanger system

11 inner part 12 outer part

13, 14 plates

15 exchanger channel field

16, 17 breakthroughs for first fluid

18, 19 breakthroughs for second fluid 20 ring area of the plates

21, 22 distribution guide and collecting guide for the first fluid

23, 24 distribution guide and collecting guide for the second fluid

25 supply line for first fluid

26 discharge line for first fluid 27 supply line for second fluid

28 discharge for second fluid

29, 30 connections for first fluid

31, 32 connections for second fluid

33 Circulation channel of the first fluid feed line 34 Circulation channel of the first fluid discharge line

35 circulation channel of the supply line second fluid

36 circulation channel of the discharge of second fluid

37 Opening for connection to drainage with collective guide 1. Fluid

38 Opening for connecting supply line with distribution guide 1. Fluid 39 Opening for connecting supply line with distribution guide 2. Fluid

40 Opening for connection to drainage with collective guide 2. Fluid

41-44 Free ends of the distribution and collection guides

45 Inner wall of the outer part

46 outer wall of the inner part 47, 48 connection cover of the outer part

49 pressure relief valve ball seat

compression spring

valve channel

seals

End plate (with only two openings)

retaining ring

Claims

claims

1. Heat exchanger system (10) for energy exchange between two fluids, comprising an inner part (11) as a heat exchanger with a stack of plates (13, 14) with exchanger channels for the passage of the fluids; and with openings (16, 17, 18, 19), which through the stacked arrangement of the plates (13, 14) form distribution and collection guides (21, 22, 23, 24) for both fluids, which are essentially perpendicular to the exchanger channels lie, with a first portion of the plates (13) the exchanger channels opening into the distribution guide (21) and collecting guide (22) for the first fluid and with a second portion of the plates (14) the exchanger channels into the distributor guide (23) and collecting guide (24) open for the second fluid; and an outer part (12) for receiving the inner part (11) with lines (25, 26, 27, 28) for supplying and discharging both fluids, connections being received when the inner part (11) is received in the outer part (12) in an operational position (29, 30, 31, 32) between the lines (25, 26, 27, 28) and the distribution and collection guides (21, 22, 23, 24) are made.

2. Heat exchanger system (10) according to claim 1, characterized in that at least one of the lines (25, 26, 27, 28) via openings (37, 38, 39, 40) in the inner part (11) to the distribution or collection guides (21, 22, 23, 24) is connected.

3. Heat exchanger system (10) according to claim 1 or 2, characterized in that the openings (37, 38, 39, 40) are formed by recesses in the stacked plates (13, 14).

4. Heat exchanger system (10) according to one of claims 1 to 3, characterized in that at least one of the lines (25, 26, 27, 28) at a free end (41, 42, 43, 44) of the distribution or collecting guides ( 21, 22, 23, 24) is connected.

5. Heat exchanger system (10) according to one of claims 1 to 4, characterized in that the outer part (12) is a housing which encloses the inner part (11) on several or all sides.

6. Heat exchanger system (10) according to claim 5, characterized in that the lines as annular or partially annular circulation channels (33, 34, 35, 36) in the housing are guided around the inner part.

7. Heat exchanger system (10) according to claim 6, characterized in that the circulation channels (33, 34, 35, 36) are designed as grooves in an inner wall (45) of the housing, and the inner part (11) is in an operational position that it closes the grooves.

8. Heat exchanger system (10) according to claim 7, characterized in that sealing rings (53) are arranged on the inner wall (45) between the grooves for sealing.

9. Heat exchanger system (10) according to one of claims 1 to 8, characterized in that the plates (13, 14) are arranged in the stack so that the exchange channels of the plates (13, 14) alternately passing the first and second fluids serve.

10. Heat exchanger system (10) according to any one of claims 1 to 9, characterized in that the plates are circular and from a square central area with the exchanger channels and one at the corners of the

Central area connected ring area exist, between the ring and In the central area, four breakthroughs for the formation of distribution and collection guides have been left out.

11. Heat exchanger system (10) according to one of claims 1 to 10, characterized in that the stack of plates is substantially columnar.

12. Heat exchanger system (10) according to one of claims 1 to 11, characterized in that the exchanger channels and / or openings (16, 17, 18, 19) in the plates (13, 14) are manufactured or can be produced using microstructure technology.

13. Heat exchanger system (10) according to one of claims 1 to 12, characterized in that there is a pressure relief valve (49) which is connected in parallel with the distribution guide (21, 23) and the collecting guide (22, 24) of one of the fluids ,

14. Heat exchanger system (10) according to one of claims 1 to 13, characterized in that the outer part (12) is an integral part of a functional block.

15. Heat exchanger system (10) according to claim 14, characterized in that the functional block is an engine block.

16. Heat exchanger system (10) according to one of claims 1 to 15, characterized in that the first fluid is an oil and the second fluid is a cooling medium, in particular water or a water-based cooling medium.