WO2007113320A1 - Heat exchanger for gases, especially exhaust gases from an engine - Google Patents

Heat exchanger for gases, especially exhaust gases from an engine Download PDF

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Publication number
WO2007113320A1
WO2007113320A1 PCT/EP2007/053319 EP2007053319W WO2007113320A1 WO 2007113320 A1 WO2007113320 A1 WO 2007113320A1 EP 2007053319 W EP2007053319 W EP 2007053319W WO 2007113320 A1 WO2007113320 A1 WO 2007113320A1
Authority
WO
WIPO (PCT)
Prior art keywords
surrounding member
gases
exchanger according
peripheral
peripheral surrounding
Prior art date
Application number
PCT/EP2007/053319
Other languages
French (fr)
Inventor
Yolanda Bravo Rodriguez
Abel Ruiz Domingo
Benjamin Gracia Lazaro
Francisco Lopez Lazaro
Original Assignee
Valeo Termico S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Termico S.A. filed Critical Valeo Termico S.A.
Publication of WO2007113320A1 publication Critical patent/WO2007113320A1/en

Links

Classifications

    • 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
    • F28D7/1684—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 the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/06—Derivation channels, e.g. bypass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/20—Fastening; Joining with threaded elements

Definitions

  • This invention relates to a heat exchanger for gases, especially exhaust gases from an engine.
  • the invention applies especially to engine exhaust gas recirculation (EGRC) exchangers, and exhaust gas exchangers for thermal control of the exhaust pipe (ETR) .
  • EGRC engine exhaust gas recirculation
  • ERR exhaust gas exchangers for thermal control of the exhaust pipe
  • heat exchangers for cooling gases for example those used in systems for the recirculation of exhaust gases to the inlet of a combustion engine, the two media which exchange heat are separated by a wall.
  • the gases pass through a number of parallel tubes or conduits located within the interior of a body, and are cooled by thermal exchange with a cooling fluid which circulates outside the conduits through which the gases pass.
  • Some heat exchangers also use an appropriate branch conduit to cause the exhaust gases to circulate without being subject to substantial cooling.
  • the branch conduit which can be referred to merely as a "by- pass”, makes it possible to minimise cooling of the exhaust gases under some engine operating conditions, for example cold starting, when its temperature is not high and cooling would be prejudicial to the emission of contaminants.
  • the tubes are attached at their extremities between two supporting plates attached to each extremity of the body.
  • the two supporting plates have a plurality of openings for fitting the corresponding tubes, and provide a joint between the tubes and the body.
  • connection means which may comprise a V connection or a peripheral connecting surrounding member or flange, depending upon the design of the recirculation unit with which the exchanger is assembled.
  • peripheral surrounding member may be assembled together with a gas containment vessel in such a way that the gas containment vessel is an intermediate piece between the body and the surrounding member.
  • the surrounding member may also be assembled directly with the body. The latter design frequently corresponds to a situation where the exchanger is directly combined with an EGR valve.
  • this component is a large part with a standard width of 8 mm, and has a rough area manufactured by pressing, forging, casting, microfusion or sintering, and the final dimensions are obtained by means of machining. These dimensions are especially important in the internal cross section given that the shape of the surface performs the function of assembly with the body through friction. In addition to this the flat area for assembly with the gas recirculation line must also be machined.
  • the supporting plates are located at both ends of the body and have the same outside dimensions as these plates are external to the body. In addition to this the plates receive all the tubes through suitable openings .
  • the supporting plates are attached to the tube bundles once the extremities of the tubes have been inserted. However, these plates do not maintain a fixed position with respect to the body on their own.
  • the correct position of the tube bundle and the body is achieved through assembling the gas containment vessel or peripheral connecting surrounding member, securing it in position radially and axially.
  • the object of the heat exchanger for gases, especially engine exhaust gases, according to this invention is to overcome the disadvantages of the exchangers known in the art, providing a reduction in manufacturing costs, as well as improved integration between the connecting components between the tube bundle and the gas recirculation line.
  • the heat exchanger for gases, especially engine exhaust gases, to which this invention relates is of the type comprising a plurality of parallel conductors located within a body through which the gases which have to be cooled by heat exchange with a cooling fluid circulate, the said conduits being connected between two supporting plates fixed at the two extremities of the said body, as well as means for connection to a conduit of the gas recirculation line, and is characterized in that the said connection means comprise a peripheral surrounding member which is incorporated as a single part with a supporting plate or tube frame, the said part being manufactured by means of a process of pressing from thin sheet.
  • peripheral surrounding member into the supporting plate and the gas containment vessel gives rise to a reduction in components, which is reflected in a lower manufacturing cost for the exchanger, given that the peripheral surrounding member in particular has a significant impact on the total cost of manufacture.
  • This merging of components also implies a reduction in weight.
  • the thin sheet will have a thickness of 3 mm or less.
  • the peripheral surrounding member includes a tubular frame facing the interior of the body.
  • this tubular frame is of short length and is intended for assembly with the body, or the said tubular frame is of a length appropriate for distributing the flow of gases in the same way as a gas containment vessel, the final extremity being designed to be assembled with the body.
  • the peripheral surrounding member is used without supporting plates, because only the peripheral surrounding member is altered, and the part is therefore very much easier to manufacture.
  • the part obtained may perform the function of a gas containment vessel, or only perform the peripheral surrounding member function.
  • the peripheral surrounding member includes a central area provided with a plurality of openings designed to support the gas tubes, acting in the way of a supporting plate, and a peripheral slot surrounding the said central area provided for assembly with one extremity of the body through an interference fit.
  • a part which performs the functions of the peripheral surrounding member and the supporting plate incorporated into a single part is obtained.
  • peripheral surrounding member with the tube bundle is assembled by means of an interference fit. This implies that no machining is required in order to achieve appropriate assembly. Furthermore quality incidents are reduced because the reduction in components implies a reduction in welding points, which are the main cause of possible gas leaks.
  • the peripheral surrounding member advantageously also includes a perimetral area provided with openings intended for the fitting of boltwork elements for attachment to the body and the conduit of the gas recirculation line.
  • This configuration is used in circumstances where junction with the recirculation gas line takes place by means of boltwork.
  • the peripheral surrounding member includes an opening which is designed to receive an exchanger by-pass conduit within it.
  • This configuration is used in circumstances where the exchanger includes a by-pass conduit, as a result of which the peripheral surrounding member can also be used to support the said by-pass conduit.
  • peripheral surrounding member includes an opening which is designed to provide the assembly with a by—pass valve.
  • Figure 1 is a perspective view of a peripheral surrounding member incorporated with a tubular frame of short length according to a first embodiment of the invention
  • Figure 2 is a perspective view of a peripheral surrounding member incorporated with a tubular frame in the form of a gas containment vessel according to a second embodiment of the invention
  • Figure 3 is a perspective view of a peripheral surrounding member incorporated with a supporting plate according to a third embodiment of the invention
  • Figure 4 is a perspective view of a peripheral surrounding member incorporated with a supporting plate according to Figure 3, being further provided with openings for boltwork
  • Figure 5 is a perspective view of a peripheral surrounding member incorporated with a supporting plate and provided with an opening designed to supported the by-pass conduit according to a fourth embodiment of the invention .
  • the heat exchanger for gases comprises a plurality of parallel tubes arranged within a body, through which the gases which have to be cooled through heat exchange for the cooling fluid circulate. These tubes are connected between two supporting plates fixed at the two extremities of the said body.
  • the exchanger also includes the peripheral surrounding member through which it can be joined to the conduit of the gas recirculation line. This peripheral surrounding member is incorporated in a single part with a tubular frame or supporting plate as described previously. Furthermore, the said peripheral surrounding member is manufactured using a process of pressing from thin sheet of thickness 3 mm or less.
  • peripheral surrounding member 1 includes a tubular frame 2 facing the interior of the body which is of short length to allow direct assembly with the body. The said length is selected solely for this assembly without altering the patterns of gas flow .
  • Peripheral surrounding member 1 also includes a perimeter area 4 provided with openings 5 for the positioning of boltwork elements for attachment to the conduit of the gas recirculation line.
  • peripheral surrounding member Ia comprises the same elements as surrounding member 1 described in the first embodiment, with the difference that tubular frame 2a is of greater length.
  • assembly is performed using a specified length and the remainder of that length acts as a gas containment vessel, bringing about an improvement in the distribution of the gases.
  • the nature of the length associated with gas containment vessel 2a may vary according to the design.
  • peripheral surrounding member Ib includes a central area 3 provided with a plurality of openings 6 designed to support the bundle of gas tubes, as a result of which it fulfils the function of a supporting plate. It also includes a peripheral slot 7 surrounding the said central area 3 provided for assembly with one extremity of the body through an interference fit.
  • a gas containment vessel can be connected between peripheral surrounding member Ib and the conduit of the recirculation line.
  • peripheral surrounding member Ic includes the same elements as surrounding member Ib and also includes a perimetral area 4 provided with openings 5 intended for fitting boltwork elements for attachment to the body and the conduit of the gas recirculation line.
  • peripheral surrounding member Id comprises the same elements as surrounding member Ib described in the third embodiment, with the difference that it also includes an opening 8 designed to receive a by-pass conduit of the interchanger through it. Said opening 8 provides longitudinal support and guidance for the by-pass conduit.
  • this part Id includes the functions of a supporting plate 2 for the gas tubes and also joins the body and the by-pass conduit .
  • perimetral surrounding member Id may include an opening intended to provide the assembly with a by ⁇ pass valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The present invention concerns a heat exchanger for gases, especially engine exhaust gases, which comprises a plurality of parallel conduits located within a body through which gases which are to be cooled through heat exchange with a cooling fluid circulate, the said conduits being connected to supporting plates attached to the two extremities of the said body, and connecting means (1 to 1d) to a conduit of the gas recirculation line, characterized in that the said connecting means comprise a peripheral surrounding member (1 to 1d) incorporated as a single piece with a supporting plate (3) or a tubular frame (2, 2a), this part being manufactured by means of a process of pressing from thin sheet.

Description

HEAT EXCHANGER FOR GASES, ESPECIALLY EXHAUST GASES FROM
AN ENGINE
This invention relates to a heat exchanger for gases, especially exhaust gases from an engine.
The invention applies especially to engine exhaust gas recirculation (EGRC) exchangers, and exhaust gas exchangers for thermal control of the exhaust pipe (ETR) .
BACKGROUND TO THE INVENTION
In some heat exchangers for cooling gases, for example those used in systems for the recirculation of exhaust gases to the inlet of a combustion engine, the two media which exchange heat are separated by a wall.
More particularly the gases pass through a number of parallel tubes or conduits located within the interior of a body, and are cooled by thermal exchange with a cooling fluid which circulates outside the conduits through which the gases pass.
Some heat exchangers also use an appropriate branch conduit to cause the exhaust gases to circulate without being subject to substantial cooling. The branch conduit, which can be referred to merely as a "by- pass", makes it possible to minimise cooling of the exhaust gases under some engine operating conditions, for example cold starting, when its temperature is not high and cooling would be prejudicial to the emission of contaminants.
The tubes are attached at their extremities between two supporting plates attached to each extremity of the body. The two supporting plates have a plurality of openings for fitting the corresponding tubes, and provide a joint between the tubes and the body.
The body is connected to the conduits of the recirculation line through connection means which may comprise a V connection or a peripheral connecting surrounding member or flange, depending upon the design of the recirculation unit with which the exchanger is assembled.
Where a peripheral surrounding member connection or flange is used, two different designs are possible. The peripheral surrounding member may be assembled together with a gas containment vessel in such a way that the gas containment vessel is an intermediate piece between the body and the surrounding member. In addition to this the surrounding member may also be assembled directly with the body. The latter design frequently corresponds to a situation where the exchanger is directly combined with an EGR valve.
In the two situations in which the peripheral surrounding member is directly assembled with the tube bundle, this component is a large part with a standard width of 8 mm, and has a rough area manufactured by pressing, forging, casting, microfusion or sintering, and the final dimensions are obtained by means of machining. These dimensions are especially important in the internal cross section given that the shape of the surface performs the function of assembly with the body through friction. In addition to this the flat area for assembly with the gas recirculation line must also be machined.
The standard assembly process is carried out using standard components having the following geometrical characteristics :
The supporting plates are located at both ends of the body and have the same outside dimensions as these plates are external to the body. In addition to this the plates receive all the tubes through suitable openings .
The supporting plates are attached to the tube bundles once the extremities of the tubes have been inserted. However, these plates do not maintain a fixed position with respect to the body on their own.
The correct position of the tube bundle and the body is achieved through assembling the gas containment vessel or peripheral connecting surrounding member, securing it in position radially and axially.
Spanish Patent Application no. 200301449 by the same applicant as the applicant for this invention, which was not published, describes a heat exchanger in which the means of connection to the gas recirculation line are incorporated as a single piece with the body or with the supporting plates.
However, the aforementioned systems for connection between the body and the tube bundle and the gas recirculation line have a number of disadvantages:
The machining process required for the peripheral surrounding member together with the large quantity of material required for its manufacture implies that this part has a high cost, with a considerable impact on the total cost of the exchanger.
There are no components in the tube bundle which can provide assembly with the gas recirculation line. Each component required needs a process of assembly and the application of welding flux in a furnace. The tube bundle in itself does not guarantee a fixed position, given that the supporting plate does not attach the tube bundle to the shell. Components are therefore required for the corresponding connection to the gas recirculation line, i.e. a gas containment vessel or a peripheral connecting surrounding member must be used. DESCRIPTION OF THE INVENTION
The object of the heat exchanger for gases, especially engine exhaust gases, according to this invention is to overcome the disadvantages of the exchangers known in the art, providing a reduction in manufacturing costs, as well as improved integration between the connecting components between the tube bundle and the gas recirculation line.
The heat exchanger for gases, especially engine exhaust gases, to which this invention relates is of the type comprising a plurality of parallel conductors located within a body through which the gases which have to be cooled by heat exchange with a cooling fluid circulate, the said conduits being connected between two supporting plates fixed at the two extremities of the said body, as well as means for connection to a conduit of the gas recirculation line, and is characterized in that the said connection means comprise a peripheral surrounding member which is incorporated as a single part with a supporting plate or tube frame, the said part being manufactured by means of a process of pressing from thin sheet.
In this way it is possible to replace the supporting plate or the gas containment vessel and the peripheral surrounding member by a single part which is produced by pressing. This component is manufactured by pressing from thin sheet, while the peripheral surrounding members known in the state of the art are manufactured by pressing, casting and/or machining from sheet of thickness over 4 mm.
In the same way, incorporation of the peripheral surrounding member into the supporting plate and the gas containment vessel gives rise to a reduction in components, which is reflected in a lower manufacturing cost for the exchanger, given that the peripheral surrounding member in particular has a significant impact on the total cost of manufacture. This merging of components also implies a reduction in weight.
Preferably the thin sheet will have a thickness of 3 mm or less.
According to another embodiment of this invention, the peripheral surrounding member includes a tubular frame facing the interior of the body.
Preferably, this tubular frame is of short length and is intended for assembly with the body, or the said tubular frame is of a length appropriate for distributing the flow of gases in the same way as a gas containment vessel, the final extremity being designed to be assembled with the body.
In this case a part which performs the functions of a peripheral surrounding member and a gas containment vessel is incorporated into a single part.
In this case the peripheral surrounding member is used without supporting plates, because only the peripheral surrounding member is altered, and the part is therefore very much easier to manufacture. Depending upon the length of the tubular frame, the part obtained may perform the function of a gas containment vessel, or only perform the peripheral surrounding member function.
According to one embodiment of this invention, the peripheral surrounding member includes a central area provided with a plurality of openings designed to support the gas tubes, acting in the way of a supporting plate, and a peripheral slot surrounding the said central area provided for assembly with one extremity of the body through an interference fit. In this case a part which performs the functions of the peripheral surrounding member and the supporting plate incorporated into a single part is obtained.
As mentioned previously, the peripheral surrounding member with the tube bundle is assembled by means of an interference fit. This implies that no machining is required in order to achieve appropriate assembly. Furthermore quality incidents are reduced because the reduction in components implies a reduction in welding points, which are the main cause of possible gas leaks.
Advantageously provision is made for fitting a gas containment vessel between the peripheral surrounding member and the conduit of the recirculation line.
In any of the embodiments mentioned, the peripheral surrounding member advantageously also includes a perimetral area provided with openings intended for the fitting of boltwork elements for attachment to the body and the conduit of the gas recirculation line.
This configuration is used in circumstances where junction with the recirculation gas line takes place by means of boltwork.
Optionally the peripheral surrounding member includes an opening which is designed to receive an exchanger by-pass conduit within it.
This configuration is used in circumstances where the exchanger includes a by-pass conduit, as a result of which the peripheral surrounding member can also be used to support the said by-pass conduit.
In addition to this the peripheral surrounding member includes an opening which is designed to provide the assembly with a by—pass valve. BRIEF DESCRIPTION OF THE DRAWINGS
In order to assist the description of what has been described above, drawings in which practical embodiments of the heat exchanger for gases, especially engine exhaust gases according to the invention, are illustrated diagrammatically and purely by way of non- restrictive examples are appended, and in these: Figure 1 is a perspective view of a peripheral surrounding member incorporated with a tubular frame of short length according to a first embodiment of the invention,
Figure 2 is a perspective view of a peripheral surrounding member incorporated with a tubular frame in the form of a gas containment vessel according to a second embodiment of the invention,
Figure 3 is a perspective view of a peripheral surrounding member incorporated with a supporting plate according to a third embodiment of the invention, Figure 4 is a perspective view of a peripheral surrounding member incorporated with a supporting plate according to Figure 3, being further provided with openings for boltwork, and Figure 5 is a perspective view of a peripheral surrounding member incorporated with a supporting plate and provided with an opening designed to supported the by-pass conduit according to a fourth embodiment of the invention .
DESCRIPTION OF PREFERRED EMBOIDMENTS
The heat exchanger for gases, especially engine exhaust gases, comprises a plurality of parallel tubes arranged within a body, through which the gases which have to be cooled through heat exchange for the cooling fluid circulate. These tubes are connected between two supporting plates fixed at the two extremities of the said body. The exchanger also includes the peripheral surrounding member through which it can be joined to the conduit of the gas recirculation line. This peripheral surrounding member is incorporated in a single part with a tubular frame or supporting plate as described previously. Furthermore, the said peripheral surrounding member is manufactured using a process of pressing from thin sheet of thickness 3 mm or less.
According to a first embodiment of the invention, as may be seen in Figure 1, peripheral surrounding member 1 includes a tubular frame 2 facing the interior of the body which is of short length to allow direct assembly with the body. The said length is selected solely for this assembly without altering the patterns of gas flow .
Peripheral surrounding member 1 also includes a perimeter area 4 provided with openings 5 for the positioning of boltwork elements for attachment to the conduit of the gas recirculation line.
According to a second embodiment of the invention, as may be seen in Figure 2, peripheral surrounding member Ia comprises the same elements as surrounding member 1 described in the first embodiment, with the difference that tubular frame 2a is of greater length. In this case assembly is performed using a specified length and the remainder of that length acts as a gas containment vessel, bringing about an improvement in the distribution of the gases. The nature of the length associated with gas containment vessel 2a may vary according to the design.
According to a third embodiment of the invention, as may be seen in Figures 3 and 4, peripheral surrounding member Ib (see Figure 3) includes a central area 3 provided with a plurality of openings 6 designed to support the bundle of gas tubes, as a result of which it fulfils the function of a supporting plate. It also includes a peripheral slot 7 surrounding the said central area 3 provided for assembly with one extremity of the body through an interference fit.
Furthermore, if desired a gas containment vessel can be connected between peripheral surrounding member Ib and the conduit of the recirculation line.
With reference to Figure 4, peripheral surrounding member Ic includes the same elements as surrounding member Ib and also includes a perimetral area 4 provided with openings 5 intended for fitting boltwork elements for attachment to the body and the conduit of the gas recirculation line.
According to a fourth embodiment of the invention, as may be seen in Figure 5, peripheral surrounding member Id comprises the same elements as surrounding member Ib described in the third embodiment, with the difference that it also includes an opening 8 designed to receive a by-pass conduit of the interchanger through it. Said opening 8 provides longitudinal support and guidance for the by-pass conduit. In this case this part Id includes the functions of a supporting plate 2 for the gas tubes and also joins the body and the by-pass conduit .
Optionally perimetral surrounding member Id may include an opening intended to provide the assembly with a by¬ pass valve.
It should be pointed out that the said opening for positioning of the by-pass conduit can be provided in any of the embodiments described.
Incorporation of the components of the peripheral surrounding member according to the invention therefore makes it possible to reduce manufacturing costs, as well as reducing weight.

Claims

1. Heat exchanger for gases, especially engine exhaust gases, which comprises a plurality of parallel conduits located within a body through which gases which are to be cooled through heat exchange with a cooling fluid circulate, the said conduits being connected to supporting plates attached to the two extremities of the said body, and connecting means (1 to Id) to a conduit of the gas recirculation line, characterized in that the said connecting means comprise a peripheral surrounding member (1 to Id) incorporated as a single piece with a supporting plate (3) or a tubular frame
(2, 2a), this part being manufactured by means of a process of pressing from thin sheet.
2. Exchanger according to Claim 1, characterized in that the thin sheet has a thickness of 3 mm or less.
3. Exchanger according to Claim 1 or 2, characterized in that the peripheral surrounding member (1, Ia) includes a tubular frame (2, 2a) facing the interior of the body.
4. Exchanger according to Claim 3, characterized in that the said tubular frame (2) is of short length, intended for assembly with the body.
5. Exchanger according to Claim 3, characterized in that the said tubular frame (2a) is of appropriate length to distribute the flow of gases in the manner of a gas containment vessel (2a) , the terminal extremity of which is designed to be assembled with the body.
6. Exchanger according to Claim 1 or 2, characterized in that the peripheral surrounding member (Ib, Ic) includes a central area (3) provided with a plurality of openings (6) intended to support the gas tubes, acting in the way of a supporting plate (3) , and a peripheral slot (7) surrounding the said central area (3) provided for assembly with one extremity of the body through an interference fit .
7. Exchanger according to Claim 6, characterized in that provision is made for a gas containment vessel between the peripheral border (Ib, Ic) and the conduit of the recirculation line.
8. Exchanger according to any one of the preceding claims, characterized in that the peripheral surrounding member (1 to Id) also includes a perimetral area (4) provided with openings (5) intended for the fitting of boltwork elements for attachment to the body and the conduit of the gas recirculation line.
9. Exchanger according to any one of the preceding claims, characterized in that the peripheral surrounding member (1 to Id) includes an opening (8) designed to receive a by-pass conduit of the exchanger through it .
10. Exchanger according to Claim 9, characterized in that the peripheral surrounding member (1 to Id) includes an opening intended to provide the assembly with a by-pass valve.
PCT/EP2007/053319 2006-04-05 2007-04-04 Heat exchanger for gases, especially exhaust gases from an engine WO2007113320A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200600875 2006-04-05
ES200600875A ES2296514B1 (en) 2006-04-05 2006-04-05 HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE.

Publications (1)

Publication Number Publication Date
WO2007113320A1 true WO2007113320A1 (en) 2007-10-11

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PCT/EP2007/053319 WO2007113320A1 (en) 2006-04-05 2007-04-04 Heat exchanger for gases, especially exhaust gases from an engine

Country Status (2)

Country Link
ES (1) ES2296514B1 (en)
WO (1) WO2007113320A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1925899A2 (en) * 2006-11-17 2008-05-28 Valeo Termico S.A. Heat exchanger for gas, in particular for the exhaust gas of an engine
US20120305220A1 (en) * 2009-10-27 2012-12-06 Frank Sauter Exhaust gas heat exchanger
FR2997485A1 (en) * 2012-10-25 2014-05-02 Valeo Systemes Thermiques THERMAL EXCHANGER, IN PARTICULAR FOR MOTOR VEHICLE

Citations (11)

* Cited by examiner, † Cited by third party
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US3625170A (en) * 1968-12-03 1971-12-07 Olofstroem Ab Process of making holes in a plate to be used in a heat exchanger
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GB1448294A (en) * 1973-03-09 1976-09-02 Gould Contardo Spa Heat exchanger
GB2110574A (en) * 1980-03-27 1983-06-22 Modine Mfg Co A metal plate having an integral depression formed therein
GB2313438A (en) * 1996-05-22 1997-11-26 Usui Kokusai Sangyo Kk EGR gas cooler
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EP1925899A2 (en) * 2006-11-17 2008-05-28 Valeo Termico S.A. Heat exchanger for gas, in particular for the exhaust gas of an engine
EP1925899A3 (en) * 2006-11-17 2010-11-17 Valeo Termico S.A. Heat exchanger for gas, in particular for the exhaust gas of an engine
US20120305220A1 (en) * 2009-10-27 2012-12-06 Frank Sauter Exhaust gas heat exchanger
US9874404B2 (en) * 2009-10-27 2018-01-23 Mahle International Gmbh Exhaust gas heat exchanger
FR2997485A1 (en) * 2012-10-25 2014-05-02 Valeo Systemes Thermiques THERMAL EXCHANGER, IN PARTICULAR FOR MOTOR VEHICLE
WO2014064086A3 (en) * 2012-10-25 2014-06-26 Valeo Systemes Thermiques Heat exchanger, particularly for a motor vehicle
CN104884890A (en) * 2012-10-25 2015-09-02 法雷奥热系统公司 Heat exchanger, particularly for a motor vehicle
KR101757996B1 (en) * 2012-10-25 2017-07-14 발레오 시스템므 떼르미끄 Heat exchanger, particularly for a motor vehicle
CN104884890B (en) * 2012-10-25 2018-01-02 法雷奥热系统公司 Heat exchanger, the particularly heat exchanger for motor vehicles
US10279648B2 (en) 2012-10-25 2019-05-07 Valeo Systemes Thermiques Heat exchanger, particularly for a motor vehicle

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