CA2871787A1 - Heat exchanger comprising a supply channel - Google Patents
Heat exchanger comprising a supply channel Download PDFInfo
- Publication number
- CA2871787A1 CA2871787A1 CA2871787A CA2871787A CA2871787A1 CA 2871787 A1 CA2871787 A1 CA 2871787A1 CA 2871787 A CA2871787 A CA 2871787A CA 2871787 A CA2871787 A CA 2871787A CA 2871787 A1 CA2871787 A1 CA 2871787A1
- Authority
- CA
- Canada
- Prior art keywords
- casing
- heat exchanger
- medium
- channel
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0202—Header boxes having their inner space divided by partitions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F2009/0285—Other particular headers or end plates
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
The invention relates to a heat exchanger (1) for a motor vehicle, said heat exchanger (1) comprising an outer casing (2) in which heat exchanger tubes (13) are arranged and a medium can be guided into the casing (2) on the front side and can be evacuated on the opposite side, and a second medium (6) can be guided to the casing (2) via the lateral side. The invention is characterised in that a channel (7) extends along at least part of the periphery on the outer side of the casing (2), the second medium (6) can be guided by a supply line into the peripheral channel (7) and passes the channel (7) into the inner chamber (I) of the casing (2) via the openings (9) in the casing (2).
Description
Heat Exchanger Comprising a Supply Channel The present invention relates to a heat exchanger for a motor vehicle, according to the features in the preamble of Claim 1.
From the prior art it is known to use heat exchangers, in particular in motor vehicles, in order to cool components by means of a medium and/or in order to remove heat from a medium in a controlled manner. In this way it is possible, for example, to cool the cooling water of an internal combustion engine of a motor vehicle in a controlled manner by means of a second medium, in particular air. However, it is also possible to cool the exhaust gas of a motor vehicle, for example, in order to feed the cooled exhaust gas itself back into the combustion process.
From DE 434 34 05 Al, for example, a tube cluster heat exchanger is known, in which at one end a medium is introduced, which strikes a tube sheet and accumulates at the tube sheet, and then is led through heat exchanger tubes CONFIRMATION COPY
located in the tube sheet. In the cross flow principle, a second medium is then introduced on the outside onto a casing of the heat exchanger, it flows through the heat exchanger and it exits the heat exchanger again at an outlet side on the opposite side from the inlet of the second medium.
From the prior art it is known to use heat exchangers, in particular in motor vehicles, in order to cool components by means of a medium and/or in order to remove heat from a medium in a controlled manner. In this way it is possible, for example, to cool the cooling water of an internal combustion engine of a motor vehicle in a controlled manner by means of a second medium, in particular air. However, it is also possible to cool the exhaust gas of a motor vehicle, for example, in order to feed the cooled exhaust gas itself back into the combustion process.
From DE 434 34 05 Al, for example, a tube cluster heat exchanger is known, in which at one end a medium is introduced, which strikes a tube sheet and accumulates at the tube sheet, and then is led through heat exchanger tubes CONFIRMATION COPY
located in the tube sheet. In the cross flow principle, a second medium is then introduced on the outside onto a casing of the heat exchanger, it flows through the heat exchanger and it exits the heat exchanger again at an outlet side on the opposite side from the inlet of the second medium.
The disadvantage here is that, in the case of the use of such a tube cluster heat exchanger as exhaust gas heat exchanger, the tube sheet in particular is exposed at least locally to the high temperatures of the flowing exhaust gas.
Therefore, the problem of the invention is to provide a heat exchanger for a motor vehicle which, with a cooling power which remains at least constant, has a better resistance of the internal components to high temperatures of the media to be passed through.
The above-mentioned problem is solved according to the invention with a heat exchanger for a motor vehicle by the features in Claim 1.
Advantageous embodiment variants of the present invention are the subject matter of the dependent claims.
The heat exchanger according to the invention for a motor vehicle, wherein the heat exchanger comprises an outer casing and heat exchanger tubes are arranged in the outer casing, and a first medium can be fed on the end side into the casing, and a second medium can be fed via the lateral face to the casing, characterized in that, on the casing, on the outside, a channel that is at least partially peripheral is formed, wherein the second medium can be led from a feed line into the peripheral channel, and through openings in the casing, it reaches the inner space of the casing from the channel.
As a result, it becomes possible that, in the heat exchanger itself, which is designed in particular as a tube cluster heat exchanger, most particularly preferably as an exhaust gas heat exchanger for a motor vehicle, an end plate or perforated plate, also known as tube sheet, through which heat exchanger tubes pass, is cooled more satisfactorily. Now, a first medium is fed into the heat exchanger and discharged again on the opposite end side.
Here, the first medium is led through the heat exchanger tubes. In the process, a second medium is introduced, based on the countercurrent principle or else on the cross current principle or else on the cocurrent principle, into the heat exchanger from one side of the casing. However, according to the invention it is provided that the second medium not just led from one side at points or else from one side through the casing of the heat exchanger laterally to the heat exchanger tubes located in the casing of the heat exchanger, but is led instead first via a feed line in the direction of the casing, most particularly preferably in the direction of an end of the casing.
Here, it is then provided according to the invention that a channel that is at least partially peripheral, and in particular completely peripheral, is formed, channel in which the second medium first flows and as a result is distributed around the casing.
In the channel itself, openings are provided, wherein the second medium, which has become distributed in the channel, can pass through the openings into the interior of the casing.
As a result, it is ensured that the second medium strikes the heat exchanger tubes not only on one side or else at points, but penetrates instead on all sides from the outside of the casing in particular simultaneously and/or at approximately equal temperature, in particular the flow temperature, into the casing of the heat exchanger. In the case of a channel arranged in the area of the end of the casing, the second medium similarly flows around the tube sheet, wherein the second medium is preferably a cooling medium, most particularly preferably cooling water.
The first medium, which is introduced on the end side into the heat exchanger and thus also strikes the tube sheet, ensures a strong heating of the tube sheet. In particular, as first medium, an exhaust gas, which can have exhaust gas temperatures of more than 600 C, at times even more than 800 C, is led here through the heat exchanger. As a result of the approximately homogeneous cooling of the tube sheet with the second medium, an excessively strong heating of the tube sheet is avoided, and at the same time, since such a heat exchanger is often thermally =
joined, in particular soldered, a one-sided distortion due to different thermal expansions is prevented. As a result, the longevity and the tightness of the heat exchanger are increased, wherein cost intensive and heat resistant materials do not need to be used, since the tube sheet is cooled more satisfactorily. Consequently, it is possible to produce the heat exchanger with improved cooling power in a clearly more cost effective manner.
In the context of the invention, the casing of the heat exchanger is, in particular, an outer cartridge or an external peripheral lateral surface. Said surface itself in turn can be designed so that it has a cross section that is, for example, round, oval or else angular, in particular polygonal, most particularly preferably rectangular or square.
Moreover it is preferable, in the context of the invention, for a flange to extend, on the outside, over the casing itself, wherein the flange can be formed as a pipe component or also as a fitting or else a elbow piece, and the flange has in particular a feed line or discharge line for the first medium. The radially peripheral channel according to the invention is formed by a radially outward oriented shaping of the flange, wherein the outward oriented shaping is designed in particular as a radial outward oriented curvature. Consequently, a hollow space forms between an inner side of the curvature and an outer lateral surface of the casing. The feed line for the second medium is then in turn connected to the flange. In particular, in the area of the curvature, a connecting piece is formed and/or a recess is formed which forms the feed line for the channel according to the invention. As a result, the second medium, in particular a cooling medium, most particularly preferably cooling water, is then led into the channel and it is distributed radially peripherally on the outside around the casing. The medium then passes through openings in the casing into the inner space of the heat exchanger or into the inner space of the casing.
In particular, the openings themselves are formed for this purpose by mutually spaced holes, wherein the holes in the casing are formed peripherally in the area of the channel. Here it is possible, in the context of the invention, to place the holes at equal mutual spacings radially peripherally to one another in the casing. Here it is conceivable, for example, for the holes to first have larger mutual spacings in the area of the feed line, wherein then, with increasing distance from the feed line in the flow direction of the channel, the mutual spacings of the holes are decreased. Here, for example, at first few holes are provided, so that, in the area of the feed line, in which a higher pressure and/or a higher flow rate of the second medium exist(s), only a small portion, relatively speaking, of the second medium enters the casing, and, with increasing distance from the feed line, due to a decrease in the spacings and thus an increase in the number of the holes, a sufficient portion of the second medium likewise enters the inner space of the casing, but with simultaneously decreasing pressure and/or decreasing flow rate of the second medium.
Moreover, in the context of the invention, it is provided that the holes have mutually differing opening cross sections, wherein the opening cross sections in particular of mutually separated openings, are formed so that they increase from the feed line on in the flow direction of the channel. Consequently, the openings in the area of the feed line have a smaller opening cross section than the openings at a distance from the feed line in the flow direction. The size of the opening cross section of each opening thus increases in the flow direction of the channel. As a result, it is possible again for the second medium to have a higher pressure and/or a higher flow rate in the area of the feed line, wherein the pressure and/or the flow rate decreases in the flow direction of the channel, so as to convey sufficient medium from the channel into the inner space of the casing, resulting in a homogeneous inflow radially peripherally into the casing.
Moreover, in the context of the invention it is possible for the cross-sectional area of the channel to be of different design; in particular the cross-sectional area of the feed line decreases in the flow direction of the channel. Due to the decreasing cross-sectional area, the decreasing pressure of the second medium in the flow direction of the channel and/or the decreasing flow rate of the second medium is/are likewise counteracted. Due to the narrowing of the cross-sectional area, the pressure and/or the flow rate of the second medium in the flow direction of the channel is/are kept approximately constant or else increased, resulting in an approximately homogeneous flow pattern through the openings into the interior of the casing.
Moreover, it is preferable in the context of the invention for a baffle plate to be arranged in the casing in the flow direction of the first fluid after the openings in the casing, wherein the baffle plate is passed through by heat exchanger tubes, and the baffle plate preferably has a central cutout for the passage of the second medium in the longitudinal direction of the casing.
The baffle plate itself first ensures that the second medium, consequently the cooling fluid, does not run or flow, after entry into the casing, directly both in the radial and also in the axial direction into the interior space of the casing, thus cooling the end plate or the tube collar only insufficiently. Thus, an accumulation of the second medium first occurs in the area of the end plate, so that the second medium in particular also cools the end plate and the heat exchanger tubes in its inflow area for the first medium. Then the second medium also flows in the axial direction, into the interior of the casing in particular through an opening or else a cutout arranged centrally in the baffle plate.
Moreover, an end plate is preferably arranged upstream of the openings in the casing in the flow direction of the first fluid through the casing, wherein the end plate for the passage of the first medium is passed through by the heat exchanger tubes. In the context of the invention, the end plate is, in particular, a tube collar or else a tube sheet. The latter, on the one hand, does not have to be formed from a high-temperature resistant and thus cost intensive material, and it can also be formed so that, in terms of wall thickness and thus is in terms of the overall material use, it is thinner and smaller, as a result of which the production costs for manufacturing due to material cost are reduced. In the context of the invention it is also possible for the coupling between the heat exchanger tube and the end plate in the tube sheet, by soldering, for example, to be manufactured with greater tolerances, since the thermal distortion does not affect the tightness and thus the longevity aspects, due to the clearly improved cooling properties in the area of the end plate.
For the manufacture of the heat exchanger according to the invention, at least one bonding connection, in particular a soldering connection, most particularly preferably a hard soldering connection, is established between the flange and the casing, most particularly preferably between the outer side of the casing and the inner side of the flange. However, in the context of the invention, it is also possible to couple the two components, the flange and the casing, to one another by a welding connection or else by a gluing connection.
In particular, the casing, but also the flange, can be produced from a metal material, for example, from a steel material, but preferably also from a light metal material. The soldering process itself here allows high degrees of freedom during the joining, since even materials that can essentially not be welded but can be soldered can be joined in a bonding and thus fluid tight manner to one another.
In particular, the channel is formed by two mutually spaced peripheral contact surfaces, between the flange and the outer side of the casing, wherein the contact surfaces are thermally joined to one another, in particular in a fluid tight manner. Consequently it is possible to first produce the holes in the casing in the predetermined manner, then shift the flange over the casing, and thereafter establish the fluid-tight thermal joining of the two components.
Additional advantages, features, properties and aspects of the present invention are the subject matter of the following description. Preferred embodiment variants are represented in the diagrammatic figures. They are used to facilitate understanding of the invention.
Figures la and lb show a heat exchanger according to the invention in a perspective view and partial section view, Figure 2 shows the operating principle of the manufacturing of the peripheral channel in a detailed section view, Figure 3 shows a heat exchanger according to the invention in a section view, Figure 4 shows an end plate according to the invention, and Figure 5 shows the end of a casing according to the invention.
In the figures, the same reference numerals are used for identical or similar components, even if a repeated description is omitted for reasons of simplification.
Figure la shows the heat exchanger 1 in a perspective view, comprising a casing 2 as well as a flange 3 which is slipped on to the casing 2 on the end side. The flange 3 has an exhaust gas line 4 for feeding a flowing exhaust gas A as well as a feed line 5 for feeding a second medium 6. The second medium 6 here reaches, through the feed line 5 itself, an outer peripheral channel 7, which is formed by means of an outward directed curvature 8 on the flange 3 itself.
According to the invention, the external peripheral channel 7 has openings 9 toward the casing 2, through which the respective medium 6 flows into a collection chamber 12 represented in Figure 3, and from said collection chamber it flows through a cutout 15 into the inner space of the heat exchanger.
Figure lb shows the heat exchanger 1 in a perspective partial section view.
Figure 2 shows the external peripheral channel 7 according to the invention in a detailed section view. The outward oriented curvature 8 on the flange 3 here forms the external peripheral channel 7 between casing 2 and flange 3. Into this channel 7, the second medium 6 flows on the outside, around the casing 2, and then, via openings 9 in the casing 2 itself, enters the inner space I of the casing 2. The medium is then separated from the feed side 10 of the exhaust gas A by an end plate 11.
Figure 3 then shows the further course of both the flowing exhaust gas A and also of the second medium 6 through the heat exchanger 1 according to the invention. The second medium 6 accumulates via the external peripheral channel 7 first on the outside around the casing 2, and then flows into the inner space I of the casing 2 first into a collection chamber 12. The collection chamber 12, on the one hand, has a border formed by the end plate 11, wherein the end plate 11 is passed through by the heat exchanger tubes 13, so that the flowing exhaust gas A can flow through the heat exchanger tubes 13. However, the collection chamber 12 is furthermore sealed off in the flow direction by a baffle plate 14, wherein the heat exchanger tubes 13 are moreover passed through the baffle plate 14. The baffle plate 14 itself has, in particular, a central cutout 15 through which the second medium 6 can then flow out of the collection chamber 12 into the inner space I of the casing 2.
Figure 4 shows the baffle plate 14 in a front view, wherein the individual heat exchanger tubes 13 or openings for the heat exchanger tubes 13 can be seen clearly, as can the central cutout 15.
Figure 5 shows a perspective view of a casing 2 according to the invention, wherein no flange 3 is slipped onto the casing 2. At the end of the casing 2, one can clearly see radially . .
peripheral individual openings 9 at a mutual spacing a for the inflow of the second fluid into the collection chamber.
Furthermore, in Figure 2, in which the baffle plate 14 is not represented, one can clearly see that in each case a bonding coupling 16 is formed between casing 2, flange 3 and end plate 11.
In Figure 5, furthermore, the baffle plate 14 is arranged in the casing 2. A
medium can thus flow through the openings 9 into the collection chamber 12 and from there it can flow through the cutout 15 into the inner space I.
, Reference numerals:
1 - Heat exchanger 2 - Casing 3 - Flange 4 - Exhaust gas line - Feed line 6 - Second medium 7 - Channel 8 - Curvature 9 - Opening - Inflow side 11 - End plate 12 - Collection chamber 13 - Heat exchanger tube 14 - Baffle plate - Cutout 16¨ Bonding coupling A - Exhaust gas I - Inner space a - Spacing
Therefore, the problem of the invention is to provide a heat exchanger for a motor vehicle which, with a cooling power which remains at least constant, has a better resistance of the internal components to high temperatures of the media to be passed through.
The above-mentioned problem is solved according to the invention with a heat exchanger for a motor vehicle by the features in Claim 1.
Advantageous embodiment variants of the present invention are the subject matter of the dependent claims.
The heat exchanger according to the invention for a motor vehicle, wherein the heat exchanger comprises an outer casing and heat exchanger tubes are arranged in the outer casing, and a first medium can be fed on the end side into the casing, and a second medium can be fed via the lateral face to the casing, characterized in that, on the casing, on the outside, a channel that is at least partially peripheral is formed, wherein the second medium can be led from a feed line into the peripheral channel, and through openings in the casing, it reaches the inner space of the casing from the channel.
As a result, it becomes possible that, in the heat exchanger itself, which is designed in particular as a tube cluster heat exchanger, most particularly preferably as an exhaust gas heat exchanger for a motor vehicle, an end plate or perforated plate, also known as tube sheet, through which heat exchanger tubes pass, is cooled more satisfactorily. Now, a first medium is fed into the heat exchanger and discharged again on the opposite end side.
Here, the first medium is led through the heat exchanger tubes. In the process, a second medium is introduced, based on the countercurrent principle or else on the cross current principle or else on the cocurrent principle, into the heat exchanger from one side of the casing. However, according to the invention it is provided that the second medium not just led from one side at points or else from one side through the casing of the heat exchanger laterally to the heat exchanger tubes located in the casing of the heat exchanger, but is led instead first via a feed line in the direction of the casing, most particularly preferably in the direction of an end of the casing.
Here, it is then provided according to the invention that a channel that is at least partially peripheral, and in particular completely peripheral, is formed, channel in which the second medium first flows and as a result is distributed around the casing.
In the channel itself, openings are provided, wherein the second medium, which has become distributed in the channel, can pass through the openings into the interior of the casing.
As a result, it is ensured that the second medium strikes the heat exchanger tubes not only on one side or else at points, but penetrates instead on all sides from the outside of the casing in particular simultaneously and/or at approximately equal temperature, in particular the flow temperature, into the casing of the heat exchanger. In the case of a channel arranged in the area of the end of the casing, the second medium similarly flows around the tube sheet, wherein the second medium is preferably a cooling medium, most particularly preferably cooling water.
The first medium, which is introduced on the end side into the heat exchanger and thus also strikes the tube sheet, ensures a strong heating of the tube sheet. In particular, as first medium, an exhaust gas, which can have exhaust gas temperatures of more than 600 C, at times even more than 800 C, is led here through the heat exchanger. As a result of the approximately homogeneous cooling of the tube sheet with the second medium, an excessively strong heating of the tube sheet is avoided, and at the same time, since such a heat exchanger is often thermally =
joined, in particular soldered, a one-sided distortion due to different thermal expansions is prevented. As a result, the longevity and the tightness of the heat exchanger are increased, wherein cost intensive and heat resistant materials do not need to be used, since the tube sheet is cooled more satisfactorily. Consequently, it is possible to produce the heat exchanger with improved cooling power in a clearly more cost effective manner.
In the context of the invention, the casing of the heat exchanger is, in particular, an outer cartridge or an external peripheral lateral surface. Said surface itself in turn can be designed so that it has a cross section that is, for example, round, oval or else angular, in particular polygonal, most particularly preferably rectangular or square.
Moreover it is preferable, in the context of the invention, for a flange to extend, on the outside, over the casing itself, wherein the flange can be formed as a pipe component or also as a fitting or else a elbow piece, and the flange has in particular a feed line or discharge line for the first medium. The radially peripheral channel according to the invention is formed by a radially outward oriented shaping of the flange, wherein the outward oriented shaping is designed in particular as a radial outward oriented curvature. Consequently, a hollow space forms between an inner side of the curvature and an outer lateral surface of the casing. The feed line for the second medium is then in turn connected to the flange. In particular, in the area of the curvature, a connecting piece is formed and/or a recess is formed which forms the feed line for the channel according to the invention. As a result, the second medium, in particular a cooling medium, most particularly preferably cooling water, is then led into the channel and it is distributed radially peripherally on the outside around the casing. The medium then passes through openings in the casing into the inner space of the heat exchanger or into the inner space of the casing.
In particular, the openings themselves are formed for this purpose by mutually spaced holes, wherein the holes in the casing are formed peripherally in the area of the channel. Here it is possible, in the context of the invention, to place the holes at equal mutual spacings radially peripherally to one another in the casing. Here it is conceivable, for example, for the holes to first have larger mutual spacings in the area of the feed line, wherein then, with increasing distance from the feed line in the flow direction of the channel, the mutual spacings of the holes are decreased. Here, for example, at first few holes are provided, so that, in the area of the feed line, in which a higher pressure and/or a higher flow rate of the second medium exist(s), only a small portion, relatively speaking, of the second medium enters the casing, and, with increasing distance from the feed line, due to a decrease in the spacings and thus an increase in the number of the holes, a sufficient portion of the second medium likewise enters the inner space of the casing, but with simultaneously decreasing pressure and/or decreasing flow rate of the second medium.
Moreover, in the context of the invention, it is provided that the holes have mutually differing opening cross sections, wherein the opening cross sections in particular of mutually separated openings, are formed so that they increase from the feed line on in the flow direction of the channel. Consequently, the openings in the area of the feed line have a smaller opening cross section than the openings at a distance from the feed line in the flow direction. The size of the opening cross section of each opening thus increases in the flow direction of the channel. As a result, it is possible again for the second medium to have a higher pressure and/or a higher flow rate in the area of the feed line, wherein the pressure and/or the flow rate decreases in the flow direction of the channel, so as to convey sufficient medium from the channel into the inner space of the casing, resulting in a homogeneous inflow radially peripherally into the casing.
Moreover, in the context of the invention it is possible for the cross-sectional area of the channel to be of different design; in particular the cross-sectional area of the feed line decreases in the flow direction of the channel. Due to the decreasing cross-sectional area, the decreasing pressure of the second medium in the flow direction of the channel and/or the decreasing flow rate of the second medium is/are likewise counteracted. Due to the narrowing of the cross-sectional area, the pressure and/or the flow rate of the second medium in the flow direction of the channel is/are kept approximately constant or else increased, resulting in an approximately homogeneous flow pattern through the openings into the interior of the casing.
Moreover, it is preferable in the context of the invention for a baffle plate to be arranged in the casing in the flow direction of the first fluid after the openings in the casing, wherein the baffle plate is passed through by heat exchanger tubes, and the baffle plate preferably has a central cutout for the passage of the second medium in the longitudinal direction of the casing.
The baffle plate itself first ensures that the second medium, consequently the cooling fluid, does not run or flow, after entry into the casing, directly both in the radial and also in the axial direction into the interior space of the casing, thus cooling the end plate or the tube collar only insufficiently. Thus, an accumulation of the second medium first occurs in the area of the end plate, so that the second medium in particular also cools the end plate and the heat exchanger tubes in its inflow area for the first medium. Then the second medium also flows in the axial direction, into the interior of the casing in particular through an opening or else a cutout arranged centrally in the baffle plate.
Moreover, an end plate is preferably arranged upstream of the openings in the casing in the flow direction of the first fluid through the casing, wherein the end plate for the passage of the first medium is passed through by the heat exchanger tubes. In the context of the invention, the end plate is, in particular, a tube collar or else a tube sheet. The latter, on the one hand, does not have to be formed from a high-temperature resistant and thus cost intensive material, and it can also be formed so that, in terms of wall thickness and thus is in terms of the overall material use, it is thinner and smaller, as a result of which the production costs for manufacturing due to material cost are reduced. In the context of the invention it is also possible for the coupling between the heat exchanger tube and the end plate in the tube sheet, by soldering, for example, to be manufactured with greater tolerances, since the thermal distortion does not affect the tightness and thus the longevity aspects, due to the clearly improved cooling properties in the area of the end plate.
For the manufacture of the heat exchanger according to the invention, at least one bonding connection, in particular a soldering connection, most particularly preferably a hard soldering connection, is established between the flange and the casing, most particularly preferably between the outer side of the casing and the inner side of the flange. However, in the context of the invention, it is also possible to couple the two components, the flange and the casing, to one another by a welding connection or else by a gluing connection.
In particular, the casing, but also the flange, can be produced from a metal material, for example, from a steel material, but preferably also from a light metal material. The soldering process itself here allows high degrees of freedom during the joining, since even materials that can essentially not be welded but can be soldered can be joined in a bonding and thus fluid tight manner to one another.
In particular, the channel is formed by two mutually spaced peripheral contact surfaces, between the flange and the outer side of the casing, wherein the contact surfaces are thermally joined to one another, in particular in a fluid tight manner. Consequently it is possible to first produce the holes in the casing in the predetermined manner, then shift the flange over the casing, and thereafter establish the fluid-tight thermal joining of the two components.
Additional advantages, features, properties and aspects of the present invention are the subject matter of the following description. Preferred embodiment variants are represented in the diagrammatic figures. They are used to facilitate understanding of the invention.
Figures la and lb show a heat exchanger according to the invention in a perspective view and partial section view, Figure 2 shows the operating principle of the manufacturing of the peripheral channel in a detailed section view, Figure 3 shows a heat exchanger according to the invention in a section view, Figure 4 shows an end plate according to the invention, and Figure 5 shows the end of a casing according to the invention.
In the figures, the same reference numerals are used for identical or similar components, even if a repeated description is omitted for reasons of simplification.
Figure la shows the heat exchanger 1 in a perspective view, comprising a casing 2 as well as a flange 3 which is slipped on to the casing 2 on the end side. The flange 3 has an exhaust gas line 4 for feeding a flowing exhaust gas A as well as a feed line 5 for feeding a second medium 6. The second medium 6 here reaches, through the feed line 5 itself, an outer peripheral channel 7, which is formed by means of an outward directed curvature 8 on the flange 3 itself.
According to the invention, the external peripheral channel 7 has openings 9 toward the casing 2, through which the respective medium 6 flows into a collection chamber 12 represented in Figure 3, and from said collection chamber it flows through a cutout 15 into the inner space of the heat exchanger.
Figure lb shows the heat exchanger 1 in a perspective partial section view.
Figure 2 shows the external peripheral channel 7 according to the invention in a detailed section view. The outward oriented curvature 8 on the flange 3 here forms the external peripheral channel 7 between casing 2 and flange 3. Into this channel 7, the second medium 6 flows on the outside, around the casing 2, and then, via openings 9 in the casing 2 itself, enters the inner space I of the casing 2. The medium is then separated from the feed side 10 of the exhaust gas A by an end plate 11.
Figure 3 then shows the further course of both the flowing exhaust gas A and also of the second medium 6 through the heat exchanger 1 according to the invention. The second medium 6 accumulates via the external peripheral channel 7 first on the outside around the casing 2, and then flows into the inner space I of the casing 2 first into a collection chamber 12. The collection chamber 12, on the one hand, has a border formed by the end plate 11, wherein the end plate 11 is passed through by the heat exchanger tubes 13, so that the flowing exhaust gas A can flow through the heat exchanger tubes 13. However, the collection chamber 12 is furthermore sealed off in the flow direction by a baffle plate 14, wherein the heat exchanger tubes 13 are moreover passed through the baffle plate 14. The baffle plate 14 itself has, in particular, a central cutout 15 through which the second medium 6 can then flow out of the collection chamber 12 into the inner space I of the casing 2.
Figure 4 shows the baffle plate 14 in a front view, wherein the individual heat exchanger tubes 13 or openings for the heat exchanger tubes 13 can be seen clearly, as can the central cutout 15.
Figure 5 shows a perspective view of a casing 2 according to the invention, wherein no flange 3 is slipped onto the casing 2. At the end of the casing 2, one can clearly see radially . .
peripheral individual openings 9 at a mutual spacing a for the inflow of the second fluid into the collection chamber.
Furthermore, in Figure 2, in which the baffle plate 14 is not represented, one can clearly see that in each case a bonding coupling 16 is formed between casing 2, flange 3 and end plate 11.
In Figure 5, furthermore, the baffle plate 14 is arranged in the casing 2. A
medium can thus flow through the openings 9 into the collection chamber 12 and from there it can flow through the cutout 15 into the inner space I.
, Reference numerals:
1 - Heat exchanger 2 - Casing 3 - Flange 4 - Exhaust gas line - Feed line 6 - Second medium 7 - Channel 8 - Curvature 9 - Opening - Inflow side 11 - End plate 12 - Collection chamber 13 - Heat exchanger tube 14 - Baffle plate - Cutout 16¨ Bonding coupling A - Exhaust gas I - Inner space a - Spacing
Claims (9)
1. Heat exchanger for a motor vehicle, wherein the heat exchanger (1) comprises an outer casing (2) and heat exchanger tubes (13) are arranged in the outer casing (2), and a medium can be fed on the end side into the casing (2) and discharged on the opposite side, and a second medium (6) can be fed via the lateral face to the casing (2), characterized in that, on the casing (2), on the end side, a flange (3) is arranged, which encompasses the casing (2) on the outside, and the flange (3) has a radially outward oriented shaping, so that, between casing (2) and flange (3), a channel (7) is arranged, wherein the second medium (6) can be led from a feed line (5) of the flange (3) into the peripheral channel (7) and, through openings (9) in the casing (2), it reaches the inner space (I) of the casing (2) from the channel (7), wherein, furthermore, an exhaust gas line (4) is formed on the inner flange, in order to lead a first medium on the end side into the casing (2).
2. Heat exchanger according to Claim 1, characterized in that the channel (7) is formed on the flange (3) by a radially outward oriented curvature (8).
3. Heat exchanger according to Claim 1 or 2, characterized in that the openings (9) are holes with a mutual spacing, wherein the holes in the casing (2) are formed peripherally in the area of the channel (7).
4. Heat exchanger according to Claim 3, characterized in that the holes have mutually differing opening cross sections, and in particular the opening cross sections of mutually spaced holes are formed so that they increase from the feed line (5) on.
5. Heat exchanger according to one of the previous claims, characterized in that the cross-sectional area of the channel (7) is designed variably, and in particular the cross-sectional area decreases from the feed line (5) in the flow direction of the channel (7).
6. Heat exchanger according to one of the previous claims, characterized in that, in the flow direction of the first fluid, a baffle plate (14) is arranged after the openings (9) in the casing (2), wherein baffle plate (14) is passed through by the heat exchanger tubes (13) and preferably comprises a central cutout (15) for the passage of the second medium (6).
7. Heat exchanger according to one of the previous claims, characterized in that, in the flow direction of the first fluid, an end plate (11) is arranged upstream of the openings (9), wherein the end plate (11) is passed through by the heat exchanger tubes (13) for the passage of the first medium.
8. Heat exchanger according to one of the previous claims, characterized in that, between the flange (3) and the casing (2), in particular the outer side of the casing (2), a bonding connection, in particular a soldering connection, preferably a hard soldering connection, is established.
9. Heat exchanger according to one of the previous claims, characterized in that the channel (7) is formed by two mutually spaced peripheral contact surfaces between the flange (3) and the outer side of the casing (2), wherein the latter are thermally joined in particular in a fluid-tight manner.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261641125P | 2012-05-01 | 2012-05-01 | |
| US61/641,125 | 2012-05-01 | ||
| DE102013100885.2 | 2013-01-29 | ||
| DE102013100885.2A DE102013100885B4 (en) | 2013-01-29 | 2013-01-29 | Heat exchangers for a motor vehicle |
| PCT/EP2013/001280 WO2013164083A1 (en) | 2012-05-01 | 2013-04-30 | Heat exchanger comprising a supply channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2871787A1 true CA2871787A1 (en) | 2013-11-07 |
Family
ID=49514210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2871787A Abandoned CA2871787A1 (en) | 2012-05-01 | 2013-04-30 | Heat exchanger comprising a supply channel |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20150129182A1 (en) |
| EP (1) | EP2844943A1 (en) |
| JP (1) | JP6010217B2 (en) |
| KR (1) | KR20150006031A (en) |
| BR (1) | BR112014027282A2 (en) |
| CA (1) | CA2871787A1 (en) |
| DE (1) | DE102013100885B4 (en) |
| WO (1) | WO2013164083A1 (en) |
Cited By (1)
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|---|---|---|---|---|
| JP2015190697A (en) * | 2014-03-28 | 2015-11-02 | 日野自動車株式会社 | EGR cooler |
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| DE102014202447A1 (en) * | 2014-02-11 | 2015-08-13 | MAHLE Behr GmbH & Co. KG | Exhaust gas heat exchanger |
| DE102014226883A1 (en) * | 2014-12-22 | 2016-06-23 | Mahle International Gmbh | Heat exchanger |
| DE102015103269A1 (en) * | 2015-03-06 | 2016-09-08 | Bomat Heiztechnik Gmbh | End cap for a heat exchanger |
| HRP20220236T1 (en) * | 2016-07-19 | 2022-05-13 | Lummus Technology Inc. | Feed effluent heat exchanger |
| CN110100142A (en) * | 2016-12-20 | 2019-08-06 | 东京滤器株式会社 | Heat-exchange device |
| GB2565145B (en) * | 2017-08-04 | 2021-06-30 | Hieta Tech Limited | Heat exchanger |
| US11365942B2 (en) * | 2018-03-16 | 2022-06-21 | Hamilton Sundstrand Corporation | Integral heat exchanger mounts |
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-
2013
- 2013-01-29 DE DE102013100885.2A patent/DE102013100885B4/en not_active Expired - Fee Related
- 2013-04-30 EP EP13721908.5A patent/EP2844943A1/en not_active Withdrawn
- 2013-04-30 JP JP2015509329A patent/JP6010217B2/en not_active Expired - Fee Related
- 2013-04-30 KR KR1020147033500A patent/KR20150006031A/en not_active Application Discontinuation
- 2013-04-30 US US14/398,322 patent/US20150129182A1/en not_active Abandoned
- 2013-04-30 WO PCT/EP2013/001280 patent/WO2013164083A1/en active Application Filing
- 2013-04-30 BR BR112014027282A patent/BR112014027282A2/en not_active IP Right Cessation
- 2013-04-30 CA CA2871787A patent/CA2871787A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015190697A (en) * | 2014-03-28 | 2015-11-02 | 日野自動車株式会社 | EGR cooler |
Also Published As
| Publication number | Publication date |
|---|---|
| US20150129182A1 (en) | 2015-05-14 |
| JP2015518559A (en) | 2015-07-02 |
| DE102013100885B4 (en) | 2020-02-27 |
| BR112014027282A2 (en) | 2017-06-27 |
| DE102013100885A1 (en) | 2014-07-31 |
| WO2013164083A1 (en) | 2013-11-07 |
| EP2844943A1 (en) | 2015-03-11 |
| KR20150006031A (en) | 2015-01-15 |
| JP6010217B2 (en) | 2016-10-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20141028 |
|
| FZDE | Discontinued |
Effective date: 20170717 |