EP3489610A1 - Wärmetauscher - Google Patents

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Publication number
EP3489610A1
EP3489610A1 EP17203841.6A EP17203841A EP3489610A1 EP 3489610 A1 EP3489610 A1 EP 3489610A1 EP 17203841 A EP17203841 A EP 17203841A EP 3489610 A1 EP3489610 A1 EP 3489610A1
Authority
EP
European Patent Office
Prior art keywords
flat tubes
heat exchanger
flat
spacers
attachments
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.)
Withdrawn
Application number
EP17203841.6A
Other languages
English (en)
French (fr)
Inventor
Thierry Berger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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 Mahle International GmbH filed Critical Mahle International GmbH
Priority to EP17203841.6A priority Critical patent/EP3489610A1/de
Publication of EP3489610A1 publication Critical patent/EP3489610A1/de
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/04Arrangements for sealing elements into header boxes or end plates
    • F28F9/16Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/165Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007Auxiliary supports for elements
    • F28F9/013Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0138Auxiliary supports for elements for tubes or tube-assemblies formed by sleeves for finned tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00Reinforcing means
    • F28F2225/04Reinforcing means for conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00Reinforcing means
    • F28F2225/08Reinforcing means for header boxes

Definitions

  • the invention at hand relates to a heat exchanger comprising a plurality of flat tubes, which are arranged next to one another in at least one row and which are held in tube plates in both ends so as to be sealed.
  • Heat exchangers are used for example in motor vehicles and generally comprise a heat exchanger block, among others, which is substantially formed by flat tubes, ribs or lamellae as well as tube plates, as well as a header and/or distribution box or a deflection box.
  • the heat exchanger block and the header and/or distribution box or deflection box are connected to one another mechanically at the tube plates by means of a clamp connection or flare coupling, and provision can in each case be made for rubber seals to seal between the tube plates of the heat exchanger block and the header and/or distribution box or deflection box. In the alternative, provision can also be made for solder connections, which seal simultaneously.
  • the heat exchanger block consist of a metallic material, such as for example an aluminum material
  • the header and/or distribution box or deflection box consists of a plastic.
  • a heat exchanger in the case of which a strengthening comb is in each case arranged on the side of the tube plates, which faces the flat tubes, is known from DE 199 258 595 .
  • the strengthening comb has a row of teeth, which engage with the spaces between the side walls of adjacent flat tubes and which are connected to the tube plates, but not to the tubes themselves.
  • the tube plates are stabilized and strengthened by means of this design, so that the tube plates, which form a part of the header and/or distribution box or deflection box, can be subjected to a higher pressure.
  • the operating pressure of this known heat exchanger can thus be increased and the pressure retaining capacity is improved, without significantly increasing the weight.
  • a heat exchanger in the case of which provision is made for support means, which prevent a widening of the flat tubes and which are embodied as spacers, which run parallel to the tube plates, and which run between the side walls of adjacent flat tubes, is known from EP 0 479 012 . These spacers secure the distance of the side walls of adjacent flat tubes in the connecting area of the tube plate, in order to prevent a widening of the flat tubes in this area, which is caused by an overpressure load.
  • the invention at hand is based on the general idea of providing support means, which prevent a widening of the flat tubes and which are embodied as spacers, which run parallel to the tube plates, wherein the respective spacer is characterized in that it has flat attachments or attachment structures, which extend parallel to the side walls of the flat tubes in the longitudinal direction of the flat tubes.
  • the flat tubes are thus supported across a longer distance than this is known to date from the prior art, along their side walls, and are held apart from one another at a specified distance.
  • a widening of the flat tubes is thus not only prevented in the immediate vicinity of the tube plates, but across a relatively long distance of the flat tubes, which reaches far into the heat exchanger block.
  • the attachments can extend to the ribs or lamellae, which connect the flat tubes to one another.
  • a load on the seal of the flat tubes is reduced significantly or even prevented through this even in response to longer and higher load on the heat exchanger, and a widening of the flat tubes, which reduces the service life of the flat tubes and which is caused by the internal pressure changes and changing temperature loads, is prevented or at least reduced significantly.
  • the risk of damages to the seal of the flat tubes in the tube plates is reduced significantly, so that the reliability and service life of the heat exchanger according to the invention is increased significantly.
  • the reliability and service life of the flat tubes is also increased significantly due to the prevented or reduced widening thereof.
  • the flat attachments can hereby advantageously be embodied in such a way that they extend from the tube plate parallel to the side walls of the flat tubes in the longitudinal direction of the flat tubes and are thereby supported in a planar manner on the respective flat tube.
  • the attachments preferably extend to the ribs or lamellae.
  • the flat attachments can hereby advantageously be embodied in such a way that they extend at least across the entire width of the flat tube to the side edges of the flat tube, or that they extend beyond one or both side edges of the flat tube.
  • a large contact surface, which covers the side wall of the flat tube substantially across its entire width, is thus provided, so that the high compressive forces, which appear during the operation of the heat exchanger, can be absorbed, in order to reliably prevent a widening of the flat tubes.
  • Each spacer preferably has two such attachments or attachment structures, which extend parallel to one another and which are spaced apart from one another.
  • the respective spacer can further have a holding area, which abuts on the respective tube plate and from which the respective attachment sticks out.
  • the respective spacer can thus in particular have a substantially U-shaped cross sectional profile, wherein the two U-legs form two attachments, which are connected to one another via the U-base, which forms the holding area.
  • the spacers are embodied on at least one support comb, which can be inserted at right angles to the longitudinal axes of the flat tubes.
  • the support comb has a comb back, from which the spacers stick out sort of like teeth.
  • a simplified assembly of a heat exchanger according to the invention is thus possible, in that the respective support comb is simply inserted with its spacers into the pre-assembled heat block, parallel to the tube plates.
  • a plurality of individual spacers can hereby be assembled simultaneously in each case.
  • All of the spacers, which are assigned to the respective tube plate, are preferably embodied at a single one of such support comb.
  • the comb back can have an L-shaped cross sectional profile.
  • the spacers originate at the one or first L-leg, while the other or second L-leg can come to rest laterally on the respective tube plate and can in particular be fastened thereto, e.g. by means of soldering. Said second L-leg can laterally encompass the tube plate in this respect.
  • the support comb to have teeth, wherein the teeth have a U-shaped cross section.
  • the teeth form the spacers.
  • the legs of the U-shaped teeth are embodied as flat attachments, which extend parallel to the side walls of the flat tubes in the longitudinal direction of the flat tubes.
  • the flat tubes are thus supported across a larger distance along their side walls and are held at a specified distance from one another, so that a widening of the flat tubes is not only prevented in the immediate vicinity of the tube plates, but across a long distance of the flat tubes, which reaches far into the heat exchanger block.
  • a widening of the flat tubes can be prevented even better, when the flat attachments of the teeth abut on the side walls of the flat tubes, which is provided according to a further preferred embodiment. A widening of the flat tubes is almost completely prevented through this. If, however, a certain widening of the flat tubes is to be permitted, which may be advantageous in the case of certain applications, the flat attachments of the teeth can be arranged so as to be spaced apart from the side walls of the flat tubes at a predetermined distance, which corresponds to the permitted widening.
  • the support comb can be made of any material, which is suitable for the application purpose, which meets the requirements on temperature resistance, heat resistance, weight, etc..
  • plastics, light metal alloys or non-ferrous metals can be used.
  • the support comb can be punched out of an aluminum sheet for example and can be brought into the desired shape by means of simple bending methods.
  • the support comb is formed by means of a shaped sheet metal part, which is made of a single piece of sheet metal by means of forming, is particularly advantageous.
  • the individual attachments can be cut free and exposed, e.g., in order to form the spacers, which then stick out from the comb back.
  • a further advantageous embodiment provides for the spacers to be embodied as at least one intermediate plate, which has a slit-like opening for guide-through of the flat tubes.
  • the flat tubes are inserted into the slit-like openings of the intermediate plate, wherein at least one intermediate plate is in each case arranged adjacent to a tube plate.
  • a compact and in particular stable heat exchanger according to the invention is provided in this way.
  • the flat tubes are thus supported across a larger distance along their side walls and are held at a specified distance from one another, so that a widening of the flat tubes is not only prevented in the immediate vicinity of the tube plates, but across a long distance of the flat tubes, which reaches far into the heat exchanger block.
  • a widening of the flat tubes can be prevented even better, when the flat attachments abut on the side walls of the flat tubes, which is provided according to a further preferred embodiment. A widening of the flat tubes is almost completely prevented through this. If, however, a certain widening of the flat tubes is to be permitted, which may be advantageous in the case of certain applications, the flat attachments can be arranged so as to be spaced apart from the side walls of the flat tubes at a predetermined distance, which corresponds to the permitted widening.
  • the intermediate plate can be made of any material, which is suitable for the application purpose, which meets the requirements on temperature resistance, heat resistance, weight, etc..
  • plastics, light metal alloys or non-ferrous metals can be used.
  • the intermediate plate can be punched out of an aluminum sheet and can be brought into the desired shape by means of simple bending methods.
  • the flat attachments can advantageously be adapted to the respective application and can be embodied in such a way that they extend parallel to the side walls of the flat tubes in the longitudinal direction of the flat tubes in the described manner in accordance with the invention.
  • the flat attachments Different design options are conceivable for the flat attachments, as long as it is ensured that they extend parallel to the side walls of the flat tubes at least partially in the longitudinal direction of the flat tubes in the assembled state, and advantageously abut on the side walls of the flat tubes. As discussed in detail above, it is also possible, however, for a certain widening of the flat tubes to be permitted, which may be advantageous in the case of certain applications, so that the flat attachments can be arranged at a predetermined distance, which corresponds to the permitted widening, from the side walls of the flat tubes.
  • the remaining parameters for forming the spacers with the flat attachments can also be adapted to the respective application.
  • the width of the flat attachment as well as possibly their protrusion beyond the side edge of the side surface of the flat tube, the length of the flat attachment as well as the extension thereof from the tube plate, number of the support means or spacers, respectively, etc., among others, can be named here as relevant parameters.
  • the respective spacer can be fastened to the flat tubes, e.g. by means of a solder connection.
  • the two attachments of the spacer are fixed to the two sides of the adjacent flat tubes, which face one another, by means of solder connections.
  • the respective spacer can optionally be fixed to the respective end plate, e.g. by means of a solder connection.
  • the two U-legs are fixed to the adjacent flat tubes, while the U-base may be fixed to the respective tube plate.
  • Fig. 1 shows a heat exchanger block 10 according to the invention comprising two tube plates 20 and flat tubes 30 arranged between the tube plates 20.
  • the flat tubes 30 are in each case arranged in a tube plate 20 with their ends so as to be sealed.
  • Lamellae or ribs 70 which are advantageously soldered to the flat tubes 30, are arranged in the gaps of adjacent flat tubes 30. Only a few of such ribs are suggested in an exemplary manner in Fig. 1 .
  • the tube plates 20 in each case form a part of a box, which is not identified in more detail here, which can be a distribution box or a header box or a deflection box or a combined header and distribution box.
  • a support device 40 is arranged on each tube plate 20 so as to abut on the side, which faces the flat tubes 30.
  • the support device 40 is embodied by a support comb 60, which is inserted laterally or from the top, respectively, or in the viewing direction of Fig. 1 , respectively, into the heat exchanger block 10 illustrated here, and which is supported on the top side of the tube plate 20 by means of a support 46.
  • the support 46 is thereby part of a comb back 48 of the support comb 60.
  • the support comb 60 is held in its predetermined spot in a secure and reliable manner through this, and can additionally also be fastened to the top side of the tube plate 20 by means of suitable and known fastening means, which even further improves the reliability and service life of the heat exchanger block 10 according to the invention.
  • the support comb 60 is preferably soldered to the respective tube plate 20.
  • the support comb 60 On its side, which faces the flat tubes 30, the support comb 60 has a number of teeth 42, which are embodied in a U-shaped manner and which can basically act as spacers and which can also be identified as spacers 42 below.
  • the spacers 42 or teeth 42 engage with the gaps of adjacent flat tubes 30, namely between the respective tube plate 20 and the ribs 70.
  • the number of the teeth 42 or spacers 42, which are embodied in a U-shaped manner preferably corresponds to the number of the flat tubes 30, minus one, that is, provision is made for n-1 spacers 42 in the case of n flat tubes 30.
  • the legs of the teeth 42 are in each case embodied as flat attachments 44, which abut on the side walls 32 of the flat tubes 30.
  • the support comb 60 will be discussed in more detail later with reference to Fig. 2 . Every spacer 42 or tooth 42, which has a U-shaped profile, thus has two such attachments 44 here, which abut on side walls 32, which face one another, of adjacent flat tubes 30.
  • each end of the flat tubes 30 is supported by the flat attachments 44, wherein the flat attachments 44 in each case extend parallel to the side walls 32 of the flat tubes 30 in the longitudinal direction of the flat tubes 30.
  • the flat tubes 30 are thus supported across a larger distance along their side walls 32 and are held at a specified distance from one another. A widening of the flat tubes 30 is thus not only prevented in the immediate vicinity of the tube plates 20, but across a relatively long distance of the flat tubes 30, which reaches into the heat exchanger block 10.
  • These attachments 44 preferably extend all the way to the ribs 70.
  • Fig. 2 shows an isometric partial view of a first embodiment of a support comb 60 according to the invention comprising U-shaped teeth 42 or spacers 42, respectively.
  • the spacers 42 which are embodied in a U-shaped manner and which extend from the comb back 48, can be seen clearly in this isometric partial view of the support comb 60 according to the invention.
  • the comb back 48 can have an L-shaped profile, e.g. to form the support 46, namely as one leg of the L-profile.
  • the legs 44 of the teeth or spacers 42 which are embodied in a U-shaped manner, form the flat attachments 44, which, as already discussed, abut on the side walls 32 (not illustrated here) of the flat tubes 30 (not illustrated here) and which in each case extend parallel to the side walls 32 (not illustrated here) of the flat tubes 30 (not illustrated here) in the longitudinal direction of the flat tubes 30 (not illustrated here).
  • the flat attachments 44 are advantageously embodied in such a way that they extend at least across the entire width of the flat tube 30 (not illustrated here) to the side edges of the flat tube 30 (not illustrated here).
  • a large attachment surface, which covers the side wall 32 (not illustrated here) of the flat tube 30 (not illustrated here) substantially across its entire width, is thus provided, so that the high compressive forces, which appear during the operation of the heat exchanger, can be absorbed in order to reliably prevent a widening of the flat tubes 30 (not illustrated here).
  • the spacers 42 which have a U-shaped profile, thereby extend in the width direction of the flat tubes 30.
  • the support comb 60 can support itself on a longitudinal side of the tube plate 20 (not illustrated here) by means of the support 46.
  • the support comb 60 is held in its predetermined spot in a secure and reliable manner through this and can additionally also be fastened on the side of the tube plate 20 (not illustrated here) by means of suitable and known fastening means, which further improves the reliability and service life of the heat exchanger block 10 (not illustrated here) according to the invention.
  • the support comb 60 comprising the U-shaped teeth 42 is punched out of an aluminum sheet and can be brought into the desired form by means of simple bending methods. It is thus a shaped sheet metal part, which is made of a single piece of sheet metal by means of forming.
  • Fig. 3 shows an isometric partial view of a second embodiment of a support comb 60 according to the invention comprising U-shaped spacers 42 or teeth 42, respectively.
  • Identical components are provided with identical reference numerals here, so that a description of these components does not need to be repeated here.
  • the teeth 42 which are embodied in a U-shaped manner and which extend from the comb back 48, can also be seen clearly in the case of this embodiment of a support comb 60 according to the invention.
  • the legs 44 of the teeth 42 which are embodied in a U-shaped manner, form the flat attachments 44, which, as already discussed, abut on the side walls 32 (not illustrated here) of the flat tubes 30 (not illustrated here) and which in each case extend parallel to the side walls 32 (not illustrated here) of the flat tubes 30 (not illustrated here) in the longitudinal direction of the flat tubes 30 (not illustrated here).
  • the support 46 on the comb back 48 of the embodiment illustrated here of a support comb 60 according to the invention is bent over and is embodied in such a way that the support comb 60 can encompass the respective bottom plate (not illustrated) on the longitudinal side thereof.
  • the support comb 60 is held in its predetermined spot in a secure and reliable manner through this and can additionally also be fastened to the longitudinal side of the end plate 20 (not illustrated here) by means of suitable and known fastening means, which further improves the reliability and service life of the heat exchanger block 10 (not illustrated here) according to the invention.
  • the support comb 60 comprising the U-shaped teeth 42 is punched out of an aluminum sheet and can be brought into the desired shape by means of simple bending methods.
  • Fig. 4 shows an isometric partial view of an intermediate plate 50 according to the invention comprising slit-shaped openings 52 and flat attachments 54.
  • the flat attachments 54 are embodied on the sides of the slit-like openings 52 and abut on the side walls 32 (not illustrated here) of the flat tubes 30 (not illustrated here), as already discussed, and in each case extend parallel to the side walls 32 (not illustrated here) of the flat tubes 30 (not illustrated here) in the longitudinal direction of the flat tubes 30 (not illustrated here).
  • the slit-like openings 52 serve for the guide-through of the flat tubes 30 (not illustrated here), which are inserted into the slit-like openings 52 of the intermediate plate 50 in response to the assembly of the heat exchanger block 10 (not illustrated here).
  • the openings 52 thereby encompass the flat tubes 30 in the circumferential direction thereof.
  • the intermediate plate comprising the openings 52 and the attachments 54 also forms a support device 40.
  • the intermediate plate 50 comprising the flat attachments 54 is punched out of an aluminum sheet and has been brought into the desired shape by means of simple bending methods.

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  • 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)
EP17203841.6A 2017-11-27 2017-11-27 Wärmetauscher Withdrawn EP3489610A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17203841.6A EP3489610A1 (de) 2017-11-27 2017-11-27 Wärmetauscher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17203841.6A EP3489610A1 (de) 2017-11-27 2017-11-27 Wärmetauscher

Publications (1)

Publication Number Publication Date
EP3489610A1 true EP3489610A1 (de) 2019-05-29

Family

ID=60473427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17203841.6A Withdrawn EP3489610A1 (de) 2017-11-27 2017-11-27 Wärmetauscher

Country Status (1)

Country Link
EP (1) EP3489610A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021206141A1 (de) 2021-06-16 2022-12-22 Mahle International Gmbh Verfahren zum Beschichten eines Wärmeübertragers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479012A1 (de) 1990-10-05 1992-04-08 Behr GmbH & Co. Wärmetauscher
DE19958595A1 (de) 1998-12-07 2000-08-17 Serck Heat Transfer Ltd Verbindung für Wärmeaustauscherkern
US20010040021A1 (en) * 2000-01-28 2001-11-15 Stephane Avequin Heat-exchange module, for a motor vehicle in particular
JP2006162194A (ja) * 2004-12-09 2006-06-22 Denso Corp 熱交換器
JP2011075165A (ja) * 2009-09-29 2011-04-14 Daikin Industries Ltd 熱交換器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479012A1 (de) 1990-10-05 1992-04-08 Behr GmbH & Co. Wärmetauscher
DE19958595A1 (de) 1998-12-07 2000-08-17 Serck Heat Transfer Ltd Verbindung für Wärmeaustauscherkern
US20010040021A1 (en) * 2000-01-28 2001-11-15 Stephane Avequin Heat-exchange module, for a motor vehicle in particular
JP2006162194A (ja) * 2004-12-09 2006-06-22 Denso Corp 熱交換器
JP2011075165A (ja) * 2009-09-29 2011-04-14 Daikin Industries Ltd 熱交換器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021206141A1 (de) 2021-06-16 2022-12-22 Mahle International Gmbh Verfahren zum Beschichten eines Wärmeübertragers

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