EP0084701A1 - Elément échangeur de chaleur - Google Patents

Elément échangeur de chaleur Download PDF

Info

Publication number
EP0084701A1
EP0084701A1 EP82305862A EP82305862A EP0084701A1 EP 0084701 A1 EP0084701 A1 EP 0084701A1 EP 82305862 A EP82305862 A EP 82305862A EP 82305862 A EP82305862 A EP 82305862A EP 0084701 A1 EP0084701 A1 EP 0084701A1
Authority
EP
European Patent Office
Prior art keywords
tube
exchange element
heat exchange
inner tube
outer tube
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Withdrawn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
EP82305862A
Other languages
German (de)
English (en)
Inventor
John Dodds
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0084701A1 publication Critical patent/EP0084701A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F28D7/10—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 one within the other, e.g. concentrically
    • F28D7/106—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 one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes

Definitions

  • This invention relates to a heat exchange element, for example a heat exchange element for use in an oil cooler, and a method of producing a heat exchange element.
  • One type comprises a bundle of tubes mounted in a cylindrical casing. At intervals along the bundle of tubes baffles are provided with shut off the annular space between the exterior of the tube bundle and the interior of the casing over a sector of, say 75%, the remaining 25% sector being open. The baffles are offset with respect to one another so that the open sector of one baffle is not aligned with the open sector of the next baffle. Oil to be cooled is directed to flow across the tubes in the casing and coolant, for example water, flows through the tubes. The oil is forced to flow in a convoluted path by the baffles. Oil coolers of this type have a number of disadvantages. They have many components, are complex to assemble and have many potential leak paths. Also, they are generally expensive, partly as a consequence of the complexity in manufacturing them.
  • FIG. 1 of the accompanying drawings Another type of known oil cooler is shown in Figure 1 of the accompanying drawings.
  • This comprises an outer tube 1 within which the oil to be cooled flows.
  • An inner tube 2 is mounted within the tube 1.
  • the end portions 3 of the tube 2 are flared outwardly and either soldered, brazed or welded joints 4 are formed between the end portions 3 and the inner wall of the tube 1.
  • Metal fins or other heat transfer members 5 are in heat conductive connection with the exterior wall of the inner tube 2.
  • An inlet 6 and an outlet 7 are provided for oil to flow into and out of the annular region defined between the inner and outer tubes.
  • This type of oil cooler also has disadvantages.
  • the main one is that the joints 4 are difficult to form reliably, partly because of their having to be formed inside the tube 1. Furthermore, once the joints have been formed it is difficult to be sure that they have been formed correctly, because of the difficulty in inspecting the joints.
  • a heat exchange element comprising a first tube for a first fluid to flow through, and a second tube surrounding the first tube in the manner of a jacket and defining therewith an annular space for a second fluid to flow through, the end regions of the second tube being tapered and in sealing relationship with the exterior surface of the first tube.
  • the invention further provides a method of producing a heat exchange element which comprises locating an inner tube within an outer tube, with the ends of the inner tube extending from the ends of the outer tube, positioning at each end of the assembly of inner and outer tubes a die having means for receiving the inner tube and a bearing surface for engagement with a respective end of the outer tube, and moving the dies towards one another so as to cause the ends of the outer tube to travel radially inwardly along the said bearing surfaces into a position in engagement with or adjacent to the outer surface of the inner tube.
  • grommets preferably resilient grommets, are used to form seals between the ends of the outer tube and the exterior surface of the tube, as will be apparent from the ensuing description.
  • Figure 2 shows an embodiment comprising an inner tube 21 through which the coolant, water, or other fluid flows.
  • An outer tube 22 surrounds the inner tube in the manner of a jacket.
  • the end portions 23 of the outer tube are tapered and are joined to the inner tube by soldered, brazed or welded joints 24.
  • the end portions 23 may be of part spherical form or frusto-conical form or some other suitable shape.
  • the end portions 23 may, for example, be formed by a method described in more detail below, in which the ends of a tube are distorted into the desired shape by placing the tube between two opposed mould halves and exerting a longitudinal compressive force thereon.
  • An inlet 26 and an outlet 27 are provided for oil to flow into and out of the annular region defined between the inner and outer tubes.
  • the flows of coolant and oil are in countercurrent.
  • the cooler shown in Figure 2 has substantial advantages over that shown in Figure 1. Firstly, in the event of a failure in service of a joint 24 there can be no contamination of one fluid by the other as would be the case with both the type shown in Figure 1 and the shell and tube type which has a multitude of joints and consequently an increased possibility of contamination. Secondly, the joints 24 are external so that they are easy to form and easy to inspect for soundness. Thirdly, the process of forming the end portions 23 results in the thickness thereof increasing towards the ends where the joints 24 are formed. The increased thickness of metal adjacent the joints means that those joints are easier to form satisfactorily than would otherwise have been the case. This is in contrast to the known cooler shown in Figure 1 where the formation of the flared portions 3 means that joints are formed where the metal is thinnest.
  • Metal fins or other heat transfer members 25 are in heat conductive connection with the exterior wall of the inner tube 21.
  • the members 25 are advantageously in the form of metal coils, so the inner tube may advantageously be a wire wound metal tube of the type known as ALPHATUBE (Registered Trade Mark of Alpha Interchange Limited). If desired, heat transfer may be further improved by forming a wire winding on the interior of the inner tube 21 as well as on the exterior.
  • FIG. 3 The method illustrated in Figures 3 to 7 begins, as shown in Figure 3, with an inner tube 31.
  • this tube may be provided internally with an extended surface 32, for example a winding.
  • an external winding 33 is formed on the outside of the tube 31.
  • an outer tube 34 is placed over the inner tube 31.
  • holes 35 are drilled in the outer tube and inlet and outlet tubes 36 are welded or brazed into position. It is preferred to form the holes 35 and attach the inlet and outlet 36 prior to positioning the outer tube over the inner tube in order to avoid the risk of damage to the external winding of the inner tube as a result of the drilling process and the welding or brazing.
  • Other methods besides welding and brazing could be used for attaching the inlet and outlet, but these methods are preferred since they are low-temperature operations, thus lessening the risk of damage to the outer tube and reducing the danger of producing weak points.
  • the next step is to position a die 37 at each end of the assembly of inner and outer tubes.
  • Each die has a central aperture 38 through which passes a respective end of the inner tube 31.
  • Each die is further provided with a part-spherical bearing surface 39 which engages with a respective end of the outer tube 34. Where the aperture 38 opens into the bearing surface 39 a resilient grommet 40 is located.
  • the dies are in position with the inner tube passing through the apertures 38 the inner, cylindrical surfaces of the grommet 40 are in engagement with the exterior surface of the inner tube 31.
  • the dies 37 are then moved towards one another and in the process deform the end regions of the outer tube 34 so that these regions slide radially inwardly along the bearing surfaces 39 until they come into tight engagement with the exterior of the grommets 40.
  • the heat exchange element thus formed is shown in Figure 7.
  • FIG 8 shows, purely by way of example, one form which the grommet 40 may take. It will be seen that this grommet has an external peripheral recess 41 in which the end of the outer tube 34 can engage.
  • the material of which the grommets 40 is made will depend on the temperature range at which the heat exchange element is to operate and on other operating conditions, for example the possible presence of corrosive fluids.
  • the grommet may, for example, be made of natural rubber, polyvinylchloride, neoprene rubber, nitrile rubber, a fluorocarbon rubber, e.g. that sold under the Trade Mark VITON, or silicone.
  • Grommets may be used in conjunction with methods of sealing the ends of the heat exchange element other than the use of the dies described above.
  • ends of the outer tube instead of deforming the ends of the outer tube that tube could be left completely cylindrical, with circular discs welded or brazed to the inner and outer tube to form the connection between them.
  • the ends of the outer tube could assume some other form, for example, a frusto-conical form.
  • connection between the inner and outer tubes may be formed by welding or brazing.
  • resilient grommets allow relative expansion between the inner and outer tubes. This is valuable since, in use, the outer tube generally becomes hotter than the inner tube so that expansion of the outer tube is usually greater than that of the inner tube. When such expansion of the outer tube occurs the tube is caused to be embedded into the material of the grommet, which thus absorbs the expansion.
  • Figure 9 shows a further embodiment of the invention, towards the end of its process of formation.
  • the embodiment comprises an inner tube 51, provided internally with a winding 52 and provided externally with a winding 53.
  • An outer tube 54 is placed over the inner tube and has holes 55 formed therein over which are secured inlet and outlet tubes 56.
  • a throttling tube 62 closed at the left-hand (upstream) end is positioned inside the inner tube 51 within the internal winding 52. The presence of the tube 62 increases the efficiency of heat exchange.
  • the winding 52 is soldered both to the inner tube 51 and the throttling tube 62, and the outer winding 53 is soldered to the inner tube 51.
  • Figure 9 the embodiment of Figure 9 is shown at the stage where dies 57 have completed the deformation of the end portions of the outer tube 54, but have not yet been withdrawn. It will also be seen from Figure 9 that the dies 57 have bushes 63 defining central apertures 58, the bushes 63 providing seats which hold grommets 60 in place during movement of the dies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP82305862A 1982-01-11 1982-11-04 Elément échangeur de chaleur Withdrawn EP0084701A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8200682 1982-01-11
GB8200682 1982-01-11
GB8205946 1982-03-01
GB8205946 1982-03-01

Publications (1)

Publication Number Publication Date
EP0084701A1 true EP0084701A1 (fr) 1983-08-03

Family

ID=26281695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82305862A Withdrawn EP0084701A1 (fr) 1982-01-11 1982-11-04 Elément échangeur de chaleur

Country Status (2)

Country Link
EP (1) EP0084701A1 (fr)
AU (1) AU9062982A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3702963A1 (de) * 1987-01-31 1988-08-11 Sueddeutsche Kuehler Behr Waermetauscher
DE102004035955A1 (de) * 2004-07-23 2006-03-16 Wilhelm Hedrich Vakuumanlagen Gmbh & Co. Kg Anschlusselement für Rohrleitungen
WO2009063234A1 (fr) * 2007-11-15 2009-05-22 Specialist Heat Exchangers Limited Appareil, système et procédé de transfert thermique
SE2050529A1 (sv) * 2020-05-07 2021-11-08 Naeslund Alf Förfarande för att tillverka en spillvärmeväxlare

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107238308A (zh) * 2017-07-25 2017-10-10 陕西路圣里德太阳能研究院有限公司 导热油‑水翅片管换热管组及储能装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH280011A (fr) * 1942-12-12 1951-12-31 Westinghouse Freins & Signaux Procédé pour échanger de la chaleur entre deux fluides et échangeur de chaleur pour la mise en oeuvre de ce procédé.
FR1162651A (fr) * 1955-10-17 1958-09-16 Modine Mfg Co Perfectionnements aux structures d'échange de chaleur
GB1384606A (en) * 1972-06-09 1975-02-19 Ctc Ab Method of manufacturing a heat exchanger and a heat exchanger manufactured by such method
US4306617A (en) * 1980-01-07 1981-12-22 The Budd Company Heater for pre-heating fuel with a heated liquid

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH280011A (fr) * 1942-12-12 1951-12-31 Westinghouse Freins & Signaux Procédé pour échanger de la chaleur entre deux fluides et échangeur de chaleur pour la mise en oeuvre de ce procédé.
FR1162651A (fr) * 1955-10-17 1958-09-16 Modine Mfg Co Perfectionnements aux structures d'échange de chaleur
GB1384606A (en) * 1972-06-09 1975-02-19 Ctc Ab Method of manufacturing a heat exchanger and a heat exchanger manufactured by such method
US4306617A (en) * 1980-01-07 1981-12-22 The Budd Company Heater for pre-heating fuel with a heated liquid

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3702963A1 (de) * 1987-01-31 1988-08-11 Sueddeutsche Kuehler Behr Waermetauscher
DE102004035955A1 (de) * 2004-07-23 2006-03-16 Wilhelm Hedrich Vakuumanlagen Gmbh & Co. Kg Anschlusselement für Rohrleitungen
WO2009063234A1 (fr) * 2007-11-15 2009-05-22 Specialist Heat Exchangers Limited Appareil, système et procédé de transfert thermique
SE2050529A1 (sv) * 2020-05-07 2021-11-08 Naeslund Alf Förfarande för att tillverka en spillvärmeväxlare
WO2021225506A1 (fr) * 2020-05-07 2021-11-11 Naeslund Alf Procédé de fabrication d'un échangeur de chaleur résiduelle
SE544039C2 (sv) * 2020-05-07 2021-11-16 Naeslund Alf Förfarande för att tillverka en spillvärmeväxlare

Also Published As

Publication number Publication date
AU9062982A (en) 1983-07-21

Similar Documents

Publication Publication Date Title
AU754417B2 (en) Welded heat exchanger with grommet construction
US4172496A (en) Heat exchanger assembly
US3447603A (en) Means for resiliently mounting tubular members
US7984752B2 (en) Double-pipe heat exchanger and manufacturing method thereof
US3877518A (en) Heat exchange coil
US4372374A (en) Vented heat transfer tube assembly
AU666149B2 (en) Full fin evaporator core
US6082447A (en) Heat exchanger member and baffle installation method therefor
US20080245507A1 (en) Heat Exchanger with Telescoping Expansion Joint
US2735698A (en) Header plate-tube joint for heat-
EP0097431B1 (fr) Echangeurs de chaleur
EP0084701A1 (fr) Elément échangeur de chaleur
EP1900931A1 (fr) Propriété d'expansion thermique pour refroidisseur de gaz d'échappement
US4258460A (en) Method of making a heat exchanger
EP0259895A1 (fr) Echangeur de chaleur tubulaire
BRPI0410974B1 (pt) Trocador de calor para um veículo automotivo, e, defletor duplo de tanque de trocador de calor para um veículo automotivo
JP3017683B2 (ja) 熱交換器
JPS58120080A (ja) 熱交換器とその製造方法
CN112082404A (zh) 换热管、换热器管芯、换热器及制造方法
US4229869A (en) Method of repairing aluminum plate fin coils
JPH0684167U (ja) 熱交換器
JPH07294163A (ja) 熱交換器
GB2047833A (en) Joining tubes to plates
GB2049150A (en) Making a heat exchanger
JP2006300407A (ja) シェルアンドチューブ型熱交換器

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19831115

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840703