CN1754078B - Heat exchange device and adjustment method for working medium - Google Patents

Abstract

The present invention provides a heat-exchanger device, inner this device, to regulate the working medium through heat-exchanger medium. During the regulation process, to reach the needed working point through the heat exchange of the working medium and the heat exchange medium. The exchanging heat surface forms in the heat-exchange device, the two mediums separate with each other and exchange heat through the exchanging heat surface. In this invention, the above mentioned device has a chamber and the working medium flow into this chamber. The chamber is run through or separated by at least a pipe and the heat exchange medium flow through this pipe.

Description

Heat exchange device and adjustment method for working medium

technical field

The present invention relates to a heat exchange device and a method for regulating a working medium, that is, a working fluid, in particular to regulating the working fluid by means of the heat exchanging device.

Background technique

In a heat exchange device, the working fluid exchanges heat with the heat exchange medium through the heat exchange surface so as to reach the required working point. Various heat exchange devices of this type have been disclosed. For example, this heat exchanging device can be an automobile radiator, its working medium is the coolant of the engine, and the heat exchanging medium is the surrounding air flowing through it. Other working fluids of engines such as internal combustion engines also need to use heat exchange media. For example, the combustion air of an internal combustion engine is cooled by a heat exchanger before being returned to the combustion chamber. It is also known that compressed air cooling is required to actuate the vehicle brake or the vehicle engine brake.

These known heat exchangers are special components which are installed in separate housings and only partly participate in the overall cooling system of the engine.

In this heat exchanger, the working fluid flows through an area in a forced flow, and the heat exchange medium also flows through this area. The disadvantage is that the shell must be matched accordingly and have good pressure resistance; The way to make the working medium flow. It is therefore the object of the present invention to provide a heat exchange device in which the working fluid can be adjusted in as simple a manner as possible.

Contents of the invention

The object of the present invention is achieved by a heat exchange device related to the present invention. A method for regulating a working fluid involved in the present invention is also suitable for realizing the purpose of the present invention.

In a heat exchange device, the working fluid is conditioned by a heat exchange medium. In this process, the adjustment is to achieve the required working point through the heat exchange between the working fluid and the heat exchange medium. For this purpose, a heat exchange surface is formed in the heat exchange device, and the two media are separated from each other and exchange heat via this heat exchange surface. In the present invention, a chamber is correspondingly formed, and the working fluid flows into the chamber. The chamber is at least partially penetrated by a pipe through which the heat exchange medium flows.

In this structure, the working fluid does not have to actively flow through the heat exchange surface, so that the heat exchange can be realized through free convection with partial forced flow or no forced flow at all. In this case, the conditioning of the working fluid specifically refers to the cooling of the working fluid.

According to a preferred configuration of the present invention, the chamber is penetrated by at least one duct in the direction in which its longitudinal length is greatest. The direction in which the longitudinal length of the pipes along the chamber is the greatest can make the surface area of the pipes in the chamber as large as possible, thereby forming a heat exchange surface as large as possible. This structure is particularly advantageous for heat exchange if the heat exchange takes place mainly or almost exclusively by free convection.

According to a preferred embodiment of the invention, at least one of the tubes has heat exchange fins, such as heat exchange fins. Heat exchange fins are used to increase the surface of the pipe, thereby increasing the heat exchange surface, thereby improving the heat exchange between the two media. According to a preferred variant, the heat exchange fins are arranged on the outside of the tube and protrude from the tube into the chamber. This will especially increase the area of the heat exchange surface formed by the heat exchange fins and in contact with the working fluid. The heat conduction in the material can be increased by using suitable, good thermally conductive materials such as metals. In this way, even if the inside of the heat exchanging fins is not flowed by the heat exchanging medium, the increase in the surface is effective. According to the actual situation and the requirements of the working fluid entering and leaving the chamber, the extension direction of the heat exchange fins can also be perpendicular to the extension direction of the pipes in the chamber, which is conducive to forming a good heat exchange. It is particularly advantageous here to arrange the fins parallel to the direction of action of gravity.

According to a preferred modification of the present invention, the heat exchange fins are formed according to the direction in which the working fluid flows into the chamber and/or the direction in which it flows out of the chamber.

According to a further preferred embodiment of the invention, at least one line is arranged in the region of at least one inflow opening of the chamber. By arranging the pipes in the area of the inlet, the pipes are forced to flow around, so that in addition to a purely free convective heat exchange, a forced convective heat exchange also partially occurs. According to a further embodiment, it is also possible to provide a plurality of inflow openings for the chamber, with a conduit in the region of each inflow opening. It is of course also possible to provide a common line for several inflows. In particular, it may also be the case that only a small number of conduits are provided, each of which is arranged in several inflow regions. On the other hand, it is also possible to set up another pipe that belongs only to each inflow port. In this way, the number of ducts is at least the same as the number of inflow openings.

Likewise, as an alternative or supplementary provision, at least one conduit is arranged in the region of at least one outflow. Here, when the working fluid flows out of the chamber, the flow around the pipe also causes a forced convection, thus forming a supplement to the free convection. In this case, in particular, a pipe is arranged per outflow region. In this case, one pipe can also correspond to multiple outlets. However, it is also possible to arrange that there is another corresponding pipe for each outflow. The inflow port and the outflow port can also be the same opening, that is to say, one opening can serve as both the inflow port and the outflow port in circulation.

According to a special structure, each pipe corresponds to at least one inflow opening, preferably exactly one inflow opening, and corresponds to at least one outflow opening, preferably at least exactly one outflow opening. In particular, it is possible to arrange a pipe to correspond to several inflow inlets, but only one outflow outlet.

In an advantageous manner, if the working fluid flows directly through the region provided with the heat exchange fins on the flow path from the inlet or to the outlet, then this region can be well flowed through by the medium. This results in a particularly beneficial forced flow of the inflowing or outflowing working fluid, thereby increasing the efficiency of the forced convection.

According to a preferred configuration of the present invention, the chamber serves as a reservoir for the working fluid. In this way, a possibly required storage simultaneously becomes a heat exchange device. This makes it possible to dispense with a separate housing for the heat exchange device. The advantage of this design is in particular that the structural requirements for the housing of the heat exchange device are identical at least in major parts to that of a store. The two have basically the same requirements for sealing, pressure resistance and thermal allowable load.

In a further development of the invention, the chamber can also form a pressure accumulator. Especially when the working fluid is in gaseous phase, the pressure accumulator has the following advantages: the heat exchange between the working fluid under pressure and the heat exchange medium is better than the heat exchange between the working fluid and the heat exchange medium under atmospheric pressure.

According to a further development of the invention, the chamber is formed as a component of an engine component or compressor component, in particular an engine exhaust gas recirculation system, an exhaust gas recirculation device or a braking device. No matter whether the heat exchanging device has the storage function or not, once it becomes a functional element, the manufacturing cost of the heat exchanging device will be greatly reduced. According to a preferred embodiment, the chambers required for the heat exchange device can be formed directly on the area of the engine block or form part of it. In this way, the chamber can be produced in a particularly simple manner.

In the present invention, the method for conditioning the working fluid via the heat exchange medium provides that the working fluid flows into a chamber and the heat exchange medium flows through the chamber through a pipe running through the chamber. This working method enables heat exchange to be realized without relying on forced flow of the working fluid through the heat exchanger. Advantageously, the conditioning of the working fluid in the chamber is at least partially by free convection. This heat exchange can be achieved in a particularly simple and convenient manner. According to an advantageous embodiment, the working medium flows through a region with heat exchange fins at least when flowing into or out of the chamber. The medium flows through the area with heat exchange fins, thus forming a forced convection, which will improve the efficiency of heat exchange, but will not require the working fluid to flow through the heat exchange device forcibly. In short, it will only make full use of the existing flow of working fluid. This flow is produced in particular by a pressure drop or, in most cases, has the flow characteristics of the medium itself, except for the necessary bypass flow or outflow of the working medium from the chamber. In a preferred manner, the heat exchange fins should be oriented along the inflow or outflow direction of the working fluid, so that the working fluid can flow through the fins particularly conveniently. This orientation will reduce flow resistance while allowing the media to pass between the heat exchange fins better.

According to a preferred embodiment of the method according to the invention, the heat exchange fins are oriented in the direction of the convective flow. This orientation will promote the generation of convective flow in the chamber where the residence time is relatively long and the structure in the chamber favors convective flow. This flow faces little flow resistance and flows well around the heat exchange fins, thereby enhancing free convection. If the outflow of the working fluid is relatively small compared to the volume of the chamber and the flow velocity is low, convective flow will occur first. Through this structure of the chamber and the volume of the chamber, the working fluid can be adjusted very well, because through the relatively long average residence time of the working fluid in the chamber, the relationship between the working fluid and the heat exchange medium A very good heat exchange can be achieved between them. Of course, the generation of convective flow can also be promoted by their flow direction and position on the chamber when the inflow opening and outflow opening are arranged.

According to a further preferred embodiment of the method, the working fluid is pressurized in the chamber. Such pressurized storage of the working fluid in the chamber is particularly advantageous when the working fluid is in the gas phase. The density of the particles can be increased by pressurization, thereby improving the heat exchange by free convection. Advantageously, the working fluid can be used for the operation of the vehicle engine (internal combustion engine), brake system or pressure accumulator.

Preferably, the method of the present invention is carried out by means of a heat exchange device formed according to the present invention.

Description of drawings

The present invention will be described in detail below by means of drawings and embodiments. in:

Fig. 1 is the schematic cross-sectional view of the first embodiment of the heat exchange device in the present invention;

Fig. 2 is the cross-sectional schematic view of the second embodiment of the heat exchange device in the present invention;

Fig. 3 is the longitudinal sectional schematic view of the third embodiment of the heat exchange device in the present invention;

Fig. 4 is the vertical sectional schematic diagram of the 4th embodiment of heat exchange device among the present invention;

Fig. 5 is the heat exchanging fin at the pipe region on the heat exchanging device in the present invention;

Fig. 6 is a schematic cross-sectional view of a fifth heat exchange device;

Fig. 7 is a schematic cross-sectional view of the sixth heat exchange device;

Fig. 8 is a longitudinal sectional schematic diagram of a heat exchange device;

FIG. 9 is a schematic longitudinal sectional view of a modified embodiment of a heat exchange device.

Detailed ways

Figures 1 to 4 show different embodiments of chambers and tubes arranged therein, wherein heat exchanging fins are formed on the tubes. The embodiments differ in the different configurations of the chamber 10 , the different forms of the at least one inlet and outlet and the different positioning of the at least one conduit in the chamber.

In Fig. 1 is shown a heat exchange device 99 with a chamber 10, which is rectangular in cross-section. Here, this chamber forms a reservoir for the working fluid, especially if the working fluid is under pressure.

In the embodiment shown in the figures, the chamber 10 is penetrated by three pipes 20 through which a heat exchange medium 21 flows. At the same time each of the three tubes 20 is surrounded on the outside by heat exchange fins 22 . In the plane of the illustration, an inflow opening 11 is visible, through which a working fluid 13 enters the chamber 10 . Here, the three pipes 20 are arranged so that the incoming working fluid 13 directly brushes past the pipes or passes through the heat exchange fin area. In the embodiment shown in the figures, the inflow openings 11 are assigned a plurality of ducts 20 . In the longitudinal direction of the heat exchange device 99, additional inlets can also be arranged corresponding to these pipes, or as an alternative or supplement, one or more outlets 12 can be arranged correspondingly, as shown in the longitudinal sectional views in the following Figures 3 and 4 Show.

Here, the heat exchange between the working fluid 13 and the heat exchange medium 21 is realized on the one hand by the contact of the working fluid 13 with the heat exchange fins 22 when it flows in, and on the other hand by the subsequent contact of the working fluid 13 in the chamber 10 Dwelling and cooling by free convection is achieved.

In the embodiment of the invention shown in FIG. 1 , the ducts 20 consist of circular tubes surrounded by heat exchange fins, also of circular outer contour, which are preferably positioned along an axis centered on the duct 20 . In the plane extending radially, as shown in Figure 5.

Figure 2 shows a modified structure of an exhaust gas heat exchange device. The heat exchange devices in Figures 1 and 2 are basically the same, so only the differences between the two structures are shown in Figure 2. In FIG. 2, the outer contour of the heat exchanging fins 22 is rectangular, so that the heat exchanging fins constitute a centrally isolated area of the chamber, and there is no gap between this area and the heat exchanging fins. In addition, a separate reservoir 14 is formed without heat exchange fins and has substantially the same volume as the chamber 10 . Except for this, the structure of the heat exchange device 99 in FIG. 2 is the same as that in FIG. 1 . This structure of the heat exchange fins, on the one hand, increases the heat exchange surface, and on the other hand, allows the inflowing working fluid to pass through the fin area better.

1 and 2 show a cross-section of the structure of the heat exchange device 99 of the present invention. 3 and 4 that follow show the chamber 10 in longitudinal section.

FIG. 3 shows a heat exchange device 99 with a chamber 10 which is longitudinally penetrated by a pipe 20 . At the same time, the pipe 20 has heat exchanging fins protruding toward the interior of the chamber 10 on its outer side, where a heat exchanging medium 21 (not shown in the figure) flows through the pipe as indicated by arrow 23 . Here, the heat exchange fins 22 protrude radially from the tube 20 to the periphery as shown in the figure. The working medium 13 (not shown in the figure) enters the working chamber 10 through the inlet 11 . The inflow ports 11 are arranged in sequence along the longitudinal direction of the pipe 20 , and of course they may not be staggered vertically as shown in the figure, and do not necessarily correspond to the same pipe 20 . The inflowing working fluid 13 first reaches the areas of the pipe 20 and the heat exchange fins 22 , and passes through these areas in the direction indicated by the arrow 16 . In addition, the chamber 10 also has a storage area 14, in which there are no heat exchange fins 22, and the working fluid 13 is stored to the greatest extent. In this zone, the working fluid is conditioned by free convection, during which further heat exchange takes place between the working fluid and the heat exchange medium. All the descriptions of the heat exchange medium regulating the working fluid through heat exchange either refer to the cooling of the working fluid or the heating of the working fluid. The type of regulation depends only on the direction of the temperature difference. Whether it is heating or cooling, the structural principle of the heat exchange device in the present invention is not affected.

In FIG. 3 there are two alternative or simultaneously usable arrangements of the outflow openings 12 . One of the outflow openings 12 is arranged in the longitudinal extension of the inflow opening 11 , while the other is arranged axially outwards from the storage area. In the case of the first described outflow port 12, the outflowing working fluid 13 again passes through the region with at least one pipe 20 and heat exchange fins 22, while in the case of the second described outflow port Next, the working fluid directly flows out from the storage area 14 through the outflow port 12 , and does not directly pass by the heat exchange fins 22 and the pipes 20 . A valve (not shown) can be provided in the structures of the two outflow ports to control the outflow medium, and the valves of the two outflow ports can be operated independently of each other.

FIG. 4 likewise shows a longitudinal section through the chamber 10 of the heat exchange device or pressurized cooler. Inflow openings 11 and outflow openings 12 are arranged alternately on the longitudinal sides of the chamber 10 . In the chamber 10 there is initially a gap region 18 in the inflow direction 16 . Partitions 19 are arranged in the interstitial area 18 , which separate the regions of the interstitial area 18 which correspond to the inflow openings and outflow openings from one another.

The working fluid flowing into the chamber 10 first passes through the inlet 11 as shown by the arrow 16 , flows through the gap region 18 and reaches the region with the heat exchange fins 22 . During this process, the medium flows around through the pipe 20 . The working fluid then reaches the overflow zone 14 . It is particularly advantageous in this structure of the invention that the heat exchange fins 22 protrude radially opposite to the longitudinal extension of the duct 20, between which the medium passes, while ensuring that the contact with the heat exchange fins 22 is formed. Prolonged contact of heat transfer surfaces. In the overflow zone 14, the working fluid 13 is further conditioned by free convection. Conditioning of the working fluid by free convection also takes place in the interstitial zone 18 . The working fluid flows to the outflow port 12 as shown by the arrow 17, and during this process, the area of the pipe 20 and the heat exchange fin 22 is again bypassed or passed by the medium.

In addition, it is also possible to provide an outflow opening 12 directly from the overflow region 14 to the outside. And the following structure can also be used to replace, that is, only the inflow port 11 is arranged on the side, and the gap area 18 between the two inflow ports is separated from each other by a partition 19, and the working fluid that flows in separately is only in the overflow area 14. come together. The working fluid then flows out via a single outflow opening 12 directly out of the overflow region 14 , previously referred to as a supplementary outflow opening, and protrudes out of the chamber 10 in the longitudinal direction.

In FIG. 5 are fins 22 which protrude radially from the pipe 20 . The use of such oriented fins 22 is particularly advantageous if the inflow or outflow of the working fluid is perpendicular to the direction of extension of the pipe 20 and the working medium 13 flows transversely to the throughflow in the pipe 20 during inflow or outflow. In particular, the heat exchange fins are parallel to the direction of gravity. The height of the fins is preferably between 1 mm and about 40 mm, and the pitch between the fins is preferably between 0.1 and about 20 mm.

FIG. 6 is another embodiment of the heat exchange device 100 of the present invention, which is substantially the same as the embodiment shown in FIG. 1 . The working fluid 113 first enters into the chamber 110 through the inlet 111 . The chamber 110 is penetrated by ducts 120 through which a heat exchange medium 121 flows and which are surrounded by heat exchange fins 122 . In order to increase the heat exchange between the heat exchange medium 121 and the working medium 113, another pipe 140 for accommodating the heat exchange medium 121 is provided in the wall 130 of the chamber 110, so that the chamber 110 is bounded by the pipe 140 . Conduit 140 surrounds at least a portion of chamber 110 . In order to increase the heat exchange surface between the chamber 110 and the pipe 140, the wall 130 also has heat exchange fins 150, which are parallel to the pipe 120 running through the chamber 110 in this embodiment and perpendicular to the heat exchange fins 122 .

Fig. 7 is a heat exchange device 200, the basic difference between it and the heat exchange device 100 in Fig. 6 is that the heat exchange fins 222 of the pipeline 220 occupy a larger proportion in the cross section of the chamber 210, so that the working The heat exchange surface between the mass 213 and the heat exchange medium 221 is enlarged, similar to the heat exchange device 99 shown in FIG. 2 .

FIG. 8 is a longitudinal sectional view of the heat exchange device 300 . The heat exchange device 300 is basically the same as the heat exchange device 100 in FIG. 6 , including an inflow port 311, a chamber 310, and an outflow port 312 of a working fluid 313, and an inflow port 324, pipes 320, 340, and an outflow port of a heat exchange medium 321. 325, wherein the pipes 320 and 340 have heat exchange fins 322 and 350.

The working fluid 313 enters the chamber 310 through the inlet 311, then flows from the heat exchange fin 322 to the heat exchange fin 350 as shown by the arrow 355, then flows in the direction shown by the arrow 360, and flows along one of the arrows 365 and 366 The flow shown again flows through the heat exchange fins 322 and finally exits the chamber 310 through the outflow port 312 . The arrangement of the fins 322, 350 serves as a guide for the working fluid 313, which allows the heat exchange between the working fluid and the heat exchange medium 321 flowing along arrow 370 to be enhanced and if necessary controlled.

Since there is no one-to-one correspondence between the inlet 311 and the outlet 312 on the heat exchange device 300, the working medium 313 can flow into the chamber 310 through one or more inlets 311 and/or pass through one or more Outlet 312 flows out of chamber 310 .

In FIG. 9 is a simplified embodiment of the heat exchange device 300 shown in FIG. 8 . The heat exchange device 400 has a chamber 410 and a pipe 420 for a heat exchange medium 421 , which runs through the chamber 410 and has fins 422 , as well as a wall 430 with fins 450 . The fins 450 are used to increase heat exchange between the working fluid 413 in the chamber 410 and the surrounding environment of the heat exchange device 400 . In an embodiment not shown in the figure, a further conduit for the heat exchange medium is arranged in the wall 430 , similar to the embodiment in FIG. 8 .

Each fin 450 is interrupted in the middle. In this case, each interrupted fin is preferably located in the area of the inflow or outflow ports 411 and 412 of the working fluid 413, so as to reduce the flow resistance of the working fluid 413 in these areas. , so that the pressure loss in the chamber 410 can be reduced in favor of the working medium.

Apart from that, the working principle of the heat exchange device 400 is the same as that shown in FIG. 8 .

Claims (35)

1. The heat exchanging device has a working fluid and a heat exchanging medium, wherein the working fluid exchanges heat with the heat exchanging medium through the heat exchanging surface so as to reach the required working point. It is characterized in that the device forms a working medium into which the working fluid can flow A chamber, and the chamber is penetrated and/or surrounded by at least one pipe, and the heat exchange medium flows through the pipe; the at least one pipe has heat exchange fins; the working fluid passes through the pipe with the at least one The area of tubes and heat exchange fins then flows through an overflow zone and then again through the area with the at least one tube and heat exchange fins. 2. The heat exchange device according to claim 1, characterized in that the chamber is penetrated by at least one pipe in the direction in which its longitudinal length is greatest. 3. The heat exchange device according to claim 2, wherein the heat exchange fins are arranged on the outside of the pipe and protrude from the pipe into the chamber. 4 . The heat exchange device according to claim 3 , wherein the direction of the heat exchange fins is perpendicular to the extending direction of at least one pipe, and protrudes radially outward. 5 . The heat exchange device according to claim 4 , wherein the heat exchange fins are formed along a direction in which the working fluid flows into the chamber. 6 . The heat exchange device according to claim 5 , wherein the heat exchange fins are formed in a direction in which the working fluid flows out of the chamber. 7. The heat exchange device as claimed in claim 1, characterized in that at least one line is arranged in the area of at least one inflow opening of the chamber. 8. The heat exchange device according to claim 7, characterized in that it is further provided with a plurality of inflow openings, with a pipe in the area of each inflow opening. 9. The heat exchange device according to claim 7, characterized in that it is further provided with a plurality of inlets, and the plurality of inlets correspond to a common pipe. 10. The heat exchange device according to claim 8, wherein each inlet has another corresponding pipe. 11. The heat exchange device according to claim 7, characterized in that at least one pipe is arranged in the area of at least one outflow opening. 12. The heat exchange device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9 or 10, characterized in that at least one pipe is arranged in the area of at least one outflow. 13. The heat exchange device according to claim 11, wherein a plurality of outlets are provided, and a pipe is arranged in each outlet area. 14. The heat exchange device according to claim 11, wherein a plurality of outlets are provided, and the plurality of outlets correspond to a common pipe. 15. The heat exchange device according to claim 13, wherein each outflow port has another corresponding pipe. 16. The heat exchange device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9 or 10, wherein each pipe corresponds to at least one inlet and at least one outlet. 17. The heat exchange device according to claim 16, wherein one inlet corresponds to one outlet. 18. Heat exchange device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9 or 10, characterized in that at least one duct surrounding the chamber is arranged in the wall of the chamber, wherein , with heat exchange fins on the wall. 19. The heat exchange device according to claim 18, characterized in that the heat exchange fins of the walls and the heat exchange fins of the pipes penetrating the chamber form guides for the working fluid. 20. The heat exchange device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9 or 10, characterized in that the working fluid flows through the device on the flow path from the inlet to the outlet The area of the heat exchange fins. 21. The heat exchange device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9 or 10, wherein the chamber forms a storage for working fluid. 22. Heat exchange device according to claim 21, characterized in that the chamber forms a pressure accumulator. 23. Heat exchange device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9 or 10, characterized in that the chamber is an integral part of a functional element of the vehicle 24. The heat exchange device of claim 23, wherein the chamber forms an engine component. 25. The heat exchange device according to claim 24, characterized in that the chamber forms part of an engine exhaust gas recirculation system, an exhaust gas recirculation device, a braking device or a compressor. 26. Heat exchange device according to claim 24, characterized in that the chamber is formed directly on the engine block area or forms part thereof. 27. The heat exchange device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9 or 10, characterized in that the height of the fins is between 1mm and 40mm, and the fin spacing is between 0.1 and Between 20mm. 28. A method for regulating working fluid through a heat exchange medium, characterized in that the working fluid flows into a chamber, and the heat exchange medium flows through at least one pipe penetrating the chamber. 29. The method of claim 28, wherein the conditioning of the working fluid in the chamber is at least in part by free convection. 30. A method according to claim 28 or 29, characterized in that the working fluid passes through the region with heat exchange fins at least when flowing into or out of the chamber. 31. The method according to claim 30, characterized in that the heat exchange fins are oriented along the inflow or outflow direction of the working fluid. 32. The method of claim 30, wherein the heat exchange fins are oriented along the direction of convective flow in the chamber. 33. The method according to claim 28 or 29 or 31 or 32, characterized in that the working fluid is stored in the chamber while the working fluid is under pressure in the chamber. 34. The method according to claim 28 or 29 or 31 or 32, characterized in that the working fluid is used for the operation of the vehicle engine or brake. 35. The method according to claim 28 or 29 or 31 or 32, characterized in that the method is carried out by a heat exchange device as claimed in one of the preceding claims 1 to 23.

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