EP0501855B1 - Rohrschlangenwärmetauscher - Google Patents

Rohrschlangenwärmetauscher Download PDF

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Publication number
EP0501855B1
EP0501855B1 EP92400450A EP92400450A EP0501855B1 EP 0501855 B1 EP0501855 B1 EP 0501855B1 EP 92400450 A EP92400450 A EP 92400450A EP 92400450 A EP92400450 A EP 92400450A EP 0501855 B1 EP0501855 B1 EP 0501855B1
Authority
EP
European Patent Office
Prior art keywords
end plate
heat exchanger
connecting block
flanges
exchanger according
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.)
Expired - Lifetime
Application number
EP92400450A
Other languages
English (en)
French (fr)
Other versions
EP0501855A1 (de
Inventor
Michel Potier
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.)
Valeo Thermique Moteur SA
Original Assignee
Valeo Thermique Moteur SA
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 Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP0501855A1 publication Critical patent/EP0501855A1/de
Application granted granted Critical
Publication of EP0501855B1 publication Critical patent/EP0501855B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • 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
    • F28D1/00—Heat-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
    • F28D1/02—Heat-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
    • F28D1/04—Heat-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
    • F28D1/047—Heat-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 bent, e.g. in a serpentine or zig-zag
    • F28D1/0475—Heat-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 bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0251—Massive connectors, e.g. blocks; Plate-like connectors
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines

Definitions

  • the invention relates to a heat exchanger, of the coil type, suitable for being part of an air conditioning installation of a motor vehicle, with an inlet or outlet pipe forming part of a circulation circuit of a Refrigerant.
  • the coil type heat exchangers usually comprise a bundle of hairpin tubes, also called U-tubes, which are interconnected by crosses and which pass through a multiplicity of parallel fins.
  • the fin assembly is provided with at least one end plate which is also crossed by the hairpin tubes.
  • the end plate is generally constituted by a core which extends parallel to the fins and which comprises two fallen edges directed either on the side of the fins, or on the opposite side.
  • This end plate is essentially used for holding the heat exchanger and / or for attaching accessories, for example for attaching a support leg for the tubing.
  • brackets are brazed by ultrasound or else crimped onto the ends of the pin tubes.
  • Most heat exchangers include two coils, the tubing then being connected to the respective ends of two bundle tubes.
  • the tubing is then composed of three parts previously assembled by brazing, namely a threaded connection, an intermediate tube and two secondary tubes connected respectively to the two tubes of the bundle.
  • the connection of the two secondary tubes to the two tubes of the the heat exchanger bundle is produced either by brazing or by means of special clamping rings.
  • At least one of the pin tubes has one end which protrudes from the end plate and which is suitable for being connected to the circulation pipe of fluid by a connecting member to the fluid circulation pipe and providing a receiving housing for the sealed fitting of the or each end of the tube to be connected.
  • the invention particularly aims to remedy the aforementioned drawbacks.
  • the exchanger comprises a connection block provided with the connecting member as well as fixing means for securing the connection block on the plate end of the heat exchanger.
  • connection device which is much simpler in structure than the prior devices, since it simply comprises a block which is fitted onto the or each end of the tubes to be connected, which is provided with a connecting member to the tubing and which is attached to the end plate of the heat exchanger.
  • connecting member to the tubing can adopt any orientation desired, depending on each particular use.
  • the invention applies very particularly to a heat exchanger defined above, in which the end plate comprises a core extending parallel to the fins and provided with two fallen edges extending perpendicular to the core.
  • the aforementioned fixing means comprise screws, rivets or the like passing through the fallen edges of the end plate.
  • the two fallen edges of the end plate are turned on the side opposite to the fins of the heat exchanger, the two fallen edges form, with the core, a receiving housing for the connection block, this the latter comprising two opposite parallel faces suitable for being maintained between the two fallen edges of the end plate.
  • connection block comprises two spaced apart edges suitable for covering the two fallen edges respectively. the end plate.
  • the invention can also be applied to a heat exchanger in which the end plate is, as taught by French Patent No. 2,509,031, a clamping plate provided with holes suitable for crimping the hooks on the hairpin tubes.
  • the plate then comprises a receiving housing for the connection block.
  • this plate is molded, for example from plastic, and the receiving housing is molded with the plate.
  • This receiving housing is advantageously delimited by a cylindrical wall which depends on the plate and which is provided with an external thread, the means for fixing the connection block comprising a retaining nut suitable for being screwed onto the wall thread and having an orifice for passage of the tubing.
  • connection block comprises a housing for fitting the tubing and the retaining nut comprises an annular shoulder surrounding the passage orifice and suitable for bearing on a bead of the tubing .
  • the retaining nut is used on the one hand for holding the connection block in its housing and, on the other hand, for fitting the tubing onto this connection block.
  • the housing for receiving the connection block comprises at least one recess suitable for receiving the end of a tube to be connected, with the interposition of an annular seal.
  • the invention in another aspect, relates to a coil heat exchanger, provided with at least one connection device as defined above.
  • FIG. 1 shows a heat exchanger 10, of the coil type, comprising a bundle of hairpin tubes 12, also called U-shaped tubes, interconnected by brackets 14 of generally semi shape -circular.
  • Each pin tube 12 is produced in one piece from a tube section of circular section which is appropriately bent to form two rectilinear parts 16, parallel to each other, connected by a semi-circular part 18.
  • Each of the rectilinear parts 16 ends in an end 20 of flared shape.
  • Each of the hooks 14 is fitted and brazed, for example by ultrasound, into the respective ends 20 of two adjacent tubes 12.
  • the straight parts 16 of the tubes 12 pass through a multiplicity of fins 22 which extend parallel to each other and perpendicular to the direction of the straight parts 16.
  • the set of fins 22 is completed, at at least one of its ends, by an end plate 24 comprising a core 26 which extends parallel to the fins 22 and which is crossed by the rectilinear parts 16 of the tubes 12 .
  • the core 26 is extended by two fallen edges 28 which extend perpendicular to the core 26 and which are turned towards the side of the fins 22.
  • the core 24 further comprises two other fallen edges 30, of shorter length than the edges 28, located on the left side of the heat exchanger 10 in FIG. 1.
  • the edges 30 are turned on the side opposite to the fins 22 to serve as receptacle for a connection block 32 (FIGS. 1 to 4) which will be described in detail later.
  • the heat exchanger 10 comprises a first ply of tubes 12 whose rectilinear parts 16 are located in the same plane and connected in pairs by brackets 14, which makes it possible to define a first coil.
  • the heat exchanger 10 further comprises a second ply formed of pinned tubes 12 ′ (FIG. 3) whose rectilinear portions are located in the same plane and linked together in pairs by brackets to form a second coil.
  • the two tubes 12 and 12 ′ situated on the left side of the exchanger 10 have free flared ends, respectively 34 and 34 ′ (FIG. 3), which protrude from the end plate 24, in the region between the two fallen edges 30 located opposite.
  • the two ends 34 and 34 ′ are intended to be connected to a pipe 36 for circulating fluid.
  • the heat exchanger 10 is a condenser intended to form part of an air conditioning installation of a motor vehicle, the pipe 36 serving for the admission or the evacuation of a refrigerant simultaneously in the two coils of the heat exchanger.
  • the block 32 of generally parallelepipedal shape, is limited by a lower face 38 capable of bearing on the core 26 of the plate 24, an opposite upper face 40 two opposite lateral faces 42 capable of coming to bear against the two fallen edges 30, and two other opposite side faces 44 ( Figures 2 to 4).
  • connection block 32 comprises a connecting member 46 which is formed in one piece with the block.
  • the connecting member 46 is constituted by a nozzle provided with an external thread 48 suitable for receiving a retaining nut 50 (FIG. 1) to allow the connection of the tubing 36 with the block 32.
  • a connection with the tubing by clipping means can be envisaged, such as a connection with the tubing by clipping means.
  • the threaded end piece 46 extends along an axis XX which, in the example, is parallel to that of the tubes 12 and 12 ′. However, it is possible to give the axis XX any desired orientation, depending on the installation conditions desired for the heat exchanger 10.
  • the end piece 46 has a axial passage 52 of stepped shape which communicates with two cylindrical housings 54 and 54 ′ of parallel axes which both open into the underside 38 of the connection block 32 and which are adapted to receive respectively the ends 34 and 34 ′ of the tubes 12 and 12 ′ ( Figure 3).
  • the housings 54 and 54 ′ are formed by cylindrical bores opening onto the face 38 by means of a cylindrical part 56, respectively 56 ′, of larger diameter, suitable for receiving an O-ring seal 58, respectively 58 ′, On a recess 60 extending parallel to the face 38 to receive a plate 62.
  • This plate is provided with two orifices for the passage of the tubes 12 and 12 ′ and it is intended to ensure the compression of the O-rings 58 and 58 ′.
  • connection block 32 is fixed to the end plate 24 by two rivets 64 which pass through the two fallen edges 30 as well as the thickness of the connection block 32.
  • the latter can be made of metal, for example aluminum, or also made of plastic, for example polyamide.
  • the end plate 24 could have two fallen edges, both turned on the side opposite the fins.
  • FIGS 5 and 6 show a heat exchanger equipped with a connection device similar to that of Figures 1 to 4.
  • the heat exchanger 10 is provided with a end plate 24 whose two fallen edges 28 are, over their entire length, turned towards the side of the fins 22.
  • the connection block 32 includes two spaced apart flanges 66 located in the extension of the external faces 42 of the block.
  • the flanges 66 extend beyond the underside 38 of the block and these two edges provide between them a space whose width corresponds to that of the end plate 24.
  • the flanges 66 are adapted to come to cap respectively the two fallen edges 28 of the plate 24.
  • the block 32 is provided with a threaded end piece 46 providing an internal passage 52 opening into two cylindrical bores 54 and 54 ′.
  • the latter are suitable for receiving the ends 34 and 34 ′ of the tubes 12 and 12 ′, with the interposition of O-ring seals 58 and 58 ′.
  • the compression of the seals 58 and 58 ′ is carried out directly by the core 26 of the end plate 24.
  • the connection block 32 is held on the heat exchanger by means of two rivets 68 which cross the edges 66 and the fallen edges 28.
  • FIGS. 7 and 9 relate to another variant embodiment of the invention.
  • the ends of the pin tubes 12 are fitted and crimped on the brackets 14, instead of being brazed as in the previous embodiments.
  • the crimping of the ends of the tubes on the hooks is carried out simultaneously by means of a clamping plate 70 which at the same time constitutes an end plate of the heat exchanger as taught by French patent n ° 82 11470 cited above.
  • the plate 70 is produced by molding, for example of a plastic material, and comprises a very thick core 72 which extends parallel to the fins 22. This core comprises a multiplicity of holes arranged in the same geometrical configuration as the ends of the beam tubes.
  • the plate After insertion of the ends of the bundle tubes into the corresponding holes of the plate, and after introduction of the hooks, the plate is moved in a direction parallel to that of the tubes to allow the simultaneous crimping of the ends of the tubes of the bundle into the ends of the corresponding hooks.
  • the plate 70 is modified so as to allow the mounting of a one-piece connection device.
  • the core 72 of the plate 70 is provided, at one of its ends, with a cylindrical wall 74 turned on the side opposite to the fins 22 and provided with an external thread 76 to allow the screwing of a retaining nut 78.
  • the wall 74 delimits internally, in combination with the core 72, a cylindrical housing 80 into which open the ends 34 and 34 ′ of the tubes 12 and 12 ′ to be connected.
  • the cylindrical housing 80 receives a connection block 82 delimited by a cylindrical wall 84 whose diameter is slightly less than the diameter of the cylindrical housing 80.
  • the block 82 is further limited by a lower circular face 86 and an upper circular face 88.
  • the block 82 comprises an axial housing 90 constituted by a stepped cylindrical bore which opens, on the one hand, into the upper face 88 of the block and, on the other hand, into two spaced cylindrical bores 92 and 92 ′ opening into the lower face 86 of the block.
  • the bores 92 and 92 ′ form housings to receive the respective ends 34 and 34 ′ of the tubes 12 and 12 ′ to be connected.
  • the seal between the block 82 and the ends 34 and 34 ′ is ensured by annular seals 58 and 58 ′, as in the case of the preceding embodiments.
  • the connection tube 36 is provided, near its end 94, with an external bead 96. This bead is able to bear against a shoulder 98 of the housing 90, an annular seal 100 being interposed between the end 94 of the tubing 36 and the internal wall of the housing 90.
  • the clamping nut 78 is provided with a passage orifice 102 and further comprises an annular shoulder 104 which surrounds this passage orifice and which is capable of bearing on the bead 92 of the tubing.
  • the invention applies to any type of coil heat exchanger, in particular to condensers, but also to evaporators.

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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)

Claims (10)

  1. Schlangenrohr-Wärmetauscher, bestehend aus einem Bündel von Haarnadelrohren (12), die durch Bogenstücke (14) verbunden sind und durch eine Mehrzahl von Rippen (22) sowie durch eine Endplatte (24;70) hindurchgehen, wobei zumindest eines der Rohre (12, 12') ein Ende (34, 34') umfaßt, das über die Endplatte hinausragt, um an einem Fluidumlaufstutzen (36) durch ein Verbindungsorgan (46; 90, 78) angeschlossen zu werden, das einen Aufnahmesitz (54, 54'; 92, 92') für die dichte Einpassung des bzw. jedes Endes (34, 34') des anzuschließenden Rohrs enthalt, dadurch gekennzeichnet, daß er einen Anschlußblock (32; 82) mit dem Verbindungsorgan (46; 90; 78) sowie Befestigungsmittel (64; 68; 78) umfaßt, um den Anschlußblock (32; 82) fest an der Endplatte (24; 70) des Wärmetauschers anzubringen.
  2. Wärmetauscher nach Anspruch 1, bei dem die Endplatte (24) des Wärmetauschers einen Steg (26) enthält, der parallel zu den Rippen (22) verläuft und der mit zwei Krempen (28; 30) versehen ist, die sich senkrecht zum Steg erstrecken , dadurch gekennzeichnet, daß die Befestigungsmittel Schrauben, Nieten oder ähnliche Elemente (64; 68) umfassen, die durch die Krempen hindurchgehen.
  3. Wärmetauscher nach Anspruch 2, bei dem die beiden Krempen (30) der Endplatte (24) entgegengesetzt zu den Rippen (22) des Wärmetauschers gerichtet sind , dadurch gekennzeichnet, daß die beiden Krempen zusammen mit dem Steg (26) einen Aufnahmesitz für den Anschlußblock (32) bilden, wobei dieser zwei gegenüberliegende parallele Flächen (42) umfaßt, die zwischen den beiden Krempen (30) der Endplatte gehalten werden können.
  4. Wärmetauscher nach Anspruch 2, bei dem die beiden Krempen (28) der Endplatte (24) zur Seite der Rippen (22) des Wärmetauschers gerichtet sind , dadurch gekennzeichnet, daß der Anschlußblock (32) zwei voneinander entfernte Ränder (66) enthält, die jeweils die beiden Krempen (28) der Endplatte (24) abdecken können.
  5. Wärmetauscher nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das Verbindungsorgan zum Verbinden des Anschlußblocks ein Gewindestück (46) enthält, das mit dem Stutzen (36) über eine Mutter (50) verbunden werden kann.
  6. Wärmetauscher nach Anspruch 1, bei dem die Endplatte eine Klemmplatte (70) mit Löchern für das Anfalzen der Bogenstücke (14) an den Haarnadelrohren (12) ist, dadurch gekennzeichnet, daß die Platte (70) einen Aufnahmesitz (80) für den Anschlußblock (82) enthält.
  7. Wärmetauscher nach Anspruch 6, dadurch gekennzeichnet, daß der Aufnahmesitz (80) durch eine zylindrische Wand (74) begrenzt wird, die zu der Platte (70) gehört und die mit einem Außengewinde (76) versehen ist, und daß die Befestigungsmittel zum Befestigen des Anschlußblocks (82) eine Haltemutter (78) umfassen, die an dem Gewinde (76) der Wand (74) aufgeschraubt werden kann und eine Durchgangsöffnung (102) für den Stutzen (36) enthält.
  8. Wärmetauscher nach Anspruch 7, dadurch gekennzeichnet, daß der Anschlußblock (82) eine Aufnahme (90) für die Einpassung des Stutzens (36) umfaßt und daß die Haltemutter (78) eine ringförmige Schulter (104) aufweist, welche die Durchgangsöffnung (102) umgibt und auf einem Wulst (96) des Stutzens zur Anlage kommen kann.
  9. Wärmetauscher nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Aufnahmesitz des Anschlußblocks (32; 82) zumindest eine Aussparung (54, 54'; 92, 92') umfaßt, um das Ende (34, 34') eines anzuschließenden Rohrs (12, 12') aufzunehmen, wobei dazwischen ein Dichtring (58; 58') eingesetzt wird.
  10. Verwendung eines Anschlußblocks für einen Wärmetauscher nach einem der Ansprüche 1 bis 9.
EP92400450A 1991-02-26 1992-02-20 Rohrschlangenwärmetauscher Expired - Lifetime EP0501855B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9102285 1991-02-26
FR9102285A FR2673275B1 (fr) 1991-02-26 1991-02-26 Dispositif de raccordement d'un echangeur de chaleur, du type a serpentin, a une tubulure de circulation de fluide.

Publications (2)

Publication Number Publication Date
EP0501855A1 EP0501855A1 (de) 1992-09-02
EP0501855B1 true EP0501855B1 (de) 1995-01-11

Family

ID=9410110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400450A Expired - Lifetime EP0501855B1 (de) 1991-02-26 1992-02-20 Rohrschlangenwärmetauscher

Country Status (4)

Country Link
US (1) US5224537A (de)
EP (1) EP0501855B1 (de)
DE (1) DE69201143T2 (de)
FR (1) FR2673275B1 (de)

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JP6357178B2 (ja) * 2015-07-30 2018-07-11 株式会社デンソーエアクール 熱交換器およびその製造方法
JP6529604B2 (ja) * 2015-12-01 2019-06-12 三菱電機株式会社 冷凍サイクル装置
WO2021167355A1 (ko) 2020-02-19 2021-08-26 한온시스템 주식회사 열교환기
EP3901506A1 (de) * 2020-04-24 2021-10-27 Carrier Corporation Rohrverbindungsanordnung für einen wärmetauscher
CN111906532B (zh) * 2020-06-22 2021-11-23 黑龙江建筑职业技术学院 一种供热工程用组装式暖气片及其组装方法

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Also Published As

Publication number Publication date
FR2673275B1 (fr) 1994-01-07
FR2673275A1 (fr) 1992-08-28
EP0501855A1 (de) 1992-09-02
DE69201143D1 (de) 1995-02-23
US5224537A (en) 1993-07-06
DE69201143T2 (de) 1995-05-11

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