EP0493665B2 - Echangeur de chaleur et procédé de production d'une lamelle pour un échangeur de chaleur - Google Patents

Echangeur de chaleur et procédé de production d'une lamelle pour un échangeur de chaleur Download PDF

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Publication number
EP0493665B2
EP0493665B2 EP91119203A EP91119203A EP0493665B2 EP 0493665 B2 EP0493665 B2 EP 0493665B2 EP 91119203 A EP91119203 A EP 91119203A EP 91119203 A EP91119203 A EP 91119203A EP 0493665 B2 EP0493665 B2 EP 0493665B2
Authority
EP
European Patent Office
Prior art keywords
cutouts
heat exchanger
lamella
exchanger according
hot
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
EP91119203A
Other languages
German (de)
English (en)
Other versions
EP0493665B1 (fr
EP0493665A3 (en
EP0493665A2 (fr
Inventor
Ernst Dipl.-Ing. Schmidt
Manfred Dipl.-Ing. Seebauer (Fh)
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0493665A2 publication Critical patent/EP0493665A2/fr
Publication of EP0493665A3 publication Critical patent/EP0493665A3/de
Application granted granted Critical
Publication of EP0493665B1 publication Critical patent/EP0493665B1/fr
Publication of EP0493665B2 publication Critical patent/EP0493665B2/fr
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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators

Definitions

  • the invention relates to a heat exchanger according to the genus of the main claim.
  • a known heat exchanger of this type AT-A-391 022 is about the exhaust gas temperature to prevent condensation to bring sufficient height, a variable number removable slats available.
  • As another Measure is proposed, which is between adjacent tubes extending walls make the slats removable in certain areas, around their heat transfer surface if necessary to reduce and thereby the exhaust gas temperature to increase.
  • This version requires a subsequent one Processing of the fully assembled heat exchanger.
  • slats like fixed and removable slats or Slats with break-out wall parts required.
  • the arrangement according to the invention characteristic features of the main claim has the advantage that the Recesses can influence the heat flow so that a predeterminable temperature gradient trained along the lamella in the flow direction. Areas can be very different Avoid temperature and the maximum temperature difference at the opposite ends of the Keep the slat small.
  • the ratios of the opening angles move as well as the relationships from the distance of one Recess to the edge of a hot water pipe and its radius in certain areas corrosion behavior by reducing the Temperature gradients in the flow direction of the Improve exhaust gas.
  • FIG. 1 shows a heat exchanger in side view
  • Figure 2 is a plan view of the heat exchanger, partly cut according to line II-II in Figure 1.
  • Figure 3 shows a lamella and Figure 4 a design of the recesses.
  • Figure 5a to e are versions of different recesses shown and Figure 5f shows a variant of Hot water pipe according to Figure 1.
  • FIG. 1 shows a typical application a second-circuit heat exchanger 10 with one in the heating water pipes 12 led water pipe coil 14.
  • the water flows through an inlet 15 an upper coil 16 consisting of tubes 17 and horizontal elbows 18, over a vertical one Manifold 19 in a lower serpent 20, consisting of tubes 21 and horizontal Bends (not shown in the drawing) and from there via an outlet 24 into the not shown Service water network.
  • the heating circuit without external circulation can essentially be operated from an inlet chamber 26, a collecting or. Deflection chamber 27, an outlet chamber 28 and a heating network, not shown.
  • the Chambers 26 and 27 or 27 and 28 are respectively connected to each other via parallel heating water pipes 12.
  • the process water pipe coil 14 is by means of Copper profile rails 30 against the heating water pipes 12 supported.
  • the copper profile rails 30 can on both sides between the upstream edge of the Edelwasserrohres 12 and the tubes 21 of the lower Snake 20 and the tubes 17 of the top Snake 16 and the downstream end of the Heating water pipes 12 may be inserted ( Figure 1) or only in the upstream area (Figure 5f), wherein the tubes 17 of the upper coil 16 directly to the downstream edge of the heating water pipes 12 pressed will.
  • the heating water pipes 12 are surrounded by one Variety of slats 32, which passages 34 own the shape of the heating water pipes are adapted and incorporate them. Between the exhaust gas upstream edge 36 and the exhaust gas upstream edge 38 of the passage 34 there are recesses 40, 41 between which a web 42 is formed.
  • the slats 32 can be made of copper or other materials consist. When using copper, the Heat spread on the lamella 32 through the Cutouts are so hampered that despite none of the high thermal conductivity coefficient of copper Areas with temperatures below the dew point temperature form.
  • the shape of the cutouts 40, 41 is matched to the shape of the edge 38 on the exhaust gas inflow side and runs at a distance 44 therefrom.
  • the opening angles ⁇ 1 and ⁇ 2 seen from the lower center 46 limit the cutouts 40, 41 and the web 42 in the circumferential direction.
  • the size of the area of the recesses 48 is determined by the performance of the water heater, into the one equipped with these slats Heat exchanger is installed, determined.
  • FIG. 5 shows other possible shapes and Positions for the recesses controlling the heat flow 40, 41 and the recess 48 for power adjustment.
  • FIG. 5a shows a recess 60 in the form of an arc
  • FIG. 5b an arcuate Recess 62 with a web
  • the Figure 5c with an arcuate recess 64 two webs 65.
  • Figure 5d is a straight recess 66 and in FIG. 5e several are straight, recesses 68 distributed in the arc are shown.
  • the recesses intended for performance adjustment can of triangular shape 70, more rectangular Form 71 to 73 or round form 74 and can both on the exhaust gas inflow side Edge 36, the exhaust gas downstream edge 50 as also bring in the middle of the slat, taking it is not necessary, the recesses 70 to 74 always to position between the passages. It is also several different shapes possible combine.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (12)

  1. Echangeur de chaleur comprenant des tubes garnis d'une multiplicité de lamelles, et des évidements pratiqués dans les lamelles et influençant le passage de la chaleur, caractérisé en ce que
    les évidements (40, 41) sont pratiqués dans les lamelles (32), dans la zone des températures élevées, sensiblement entre des bords (36) des lamelles (32) situés du côté amont des gaz d'échappement pendant le fonctionnement,
    les bords (38) des lamelles (32), situés du côté amont des gaz d'échappement, des passages (34) recevant les tubes (12), pour produire une répartition uniforme de la température et une différence maximale de température aussi faible que possible sur chaque lamelle (32) et il n'y a pas de passage (34) entre les bords amont et les évidements.
  2. Echangeur de chaleur selon la revendication 1,
    caractérisé en ce que
    les évidements (40, 41) sont prévus de façon prépondérante dans la zone (36) située du côté amont des lamelles (32).
  3. Echangeur de chaleur selon la revendication 1 ou 2,
    caractérisé en ce que
    les évidements (40, 41) sont répartis en forme de demi-cercle autour des tubes d'eau chaude (12).
  4. Echangeur de chaleur selon l'une des revendications 1 à 3,
    caractérisé en ce que
    plusieurs évidements (40, 41) sont répartis autour de chaque tube d'eau chaude (12).
  5. Echangeur de chaleur selon la revendication 4,
    caractérisé en ce qu'
    entre les évidements (40, 41) sont formées des entretoises (42), et au moins une entretoise (42) relie directement le bord (36), situé du côté amont, de la lamelle (32), au bord tourné vers celle-ci, (38) d'un tube d'eau chaude (12).
  6. Echangeur de chaleur selon la revendication 4 ou 5,
    caractérisé en ce que
    les évidements (40, 21) sont répartis régulièrement, et les rapports entre les largeurs des évidements (40, 41) et les entretoises (42) situées entre eux, sont constants.
  7. Echangeur de chaleur selon l'une des revendications 1 à 6,
    caractérisé en ce que
    la forme des évidements (40, 41) est adaptée à la forme des tubes d'eau chaude (12), et les évidements (40, 41) sont mis à une distance constante du bord (38) des tubes d'eau chaude (12).
  8. Echangeur de chaleur selon l'une des revendications 6 et 7,
    caractérisé en ce que
    les angles d'ouverture α1 et α2, vus à partie d'un centre (46) d'un tube d'eau chaude (12), des entretoises (42) et des évidements (40, 41), sont l'un par rapport à l'autre dans un rapport constant.
  9. Echangeur de chaleur selon la revendication 8,
    caractérisé en ce que
    le rapport des angles d'ouverture α1 et α2 est compris entre 1:7 et 1:10.
  10. Echangeur de chaleur selon la revendication 8 et 9,
    caractérisé en ce que
    le rapport entre la distance d'un évidement (40, 41) par rapport au bord (38) d'un tube d'eau chaude (12), et le rayon du tube d'eau chaude (12) est compris entre 1:1,5 et 1:2,5, et est de préférence de l'ordre de 1:2.
  11. Echangeur de chaleur selon l'une des revendications précédentes,
    caractérisé en ce que des évidements (48) sont prévus pour ajuster, avec les lamelles (32), la puissance de l'échangeur de chaleur (10).
  12. Procédé pour fabriquer une lamelle d'un échangeur de chaleur selon l'une des revendications précédentes, lamelle qui présente des évidements influençant le passage de la chaleur, essentiellement entre des bords (36) des lamelles (32) situés, pendant le fonctionnement, du côté amont des gaz d'échappement, et des bords (38), situés du côté amont des gaz d'échappement des passages (34) des lamelles (32) recevant les tubes (12), procédé caractérisé en ce que dans une première étape, on fabrique une lamelle de base d'une seule pièce avec des passages (34) pour des tubes (12) et, dans une deuxième étape, on estampe les évidements (40, 41, 48) pour régler le flux de chaleur et pour adapter en puissance la lamelle (12) à l'échangeur de chaleur (10).
EP91119203A 1990-12-29 1991-11-12 Echangeur de chaleur et procédé de production d'une lamelle pour un échangeur de chaleur Expired - Lifetime EP0493665B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4042195 1990-12-29
DE4042195A DE4042195A1 (de) 1990-12-29 1990-12-29 Waermeuebertrage und verfahren zur herstellung einer lamelle fuer einen waermeuebertrager

Publications (4)

Publication Number Publication Date
EP0493665A2 EP0493665A2 (fr) 1992-07-08
EP0493665A3 EP0493665A3 (en) 1992-11-19
EP0493665B1 EP0493665B1 (fr) 1995-09-13
EP0493665B2 true EP0493665B2 (fr) 1998-04-15

Family

ID=6421663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119203A Expired - Lifetime EP0493665B2 (fr) 1990-12-29 1991-11-12 Echangeur de chaleur et procédé de production d'une lamelle pour un échangeur de chaleur

Country Status (4)

Country Link
EP (1) EP0493665B2 (fr)
DE (2) DE4042195A1 (fr)
ES (1) ES2077142T5 (fr)
PT (1) PT99947B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9310827U1 (de) * 1993-07-06 1993-09-23 Balcke-Dürr AG, 40882 Ratingen Waermetauscher aus mehreren parallel zueinander angeordneten austauscherrohren
DE10315966B4 (de) 2003-04-08 2007-04-05 Robert Bosch Gmbh Wärmeübertrager
PT115164A (pt) * 2018-11-21 2020-05-21 Bosch Termotecnologia Sa Permutador de calor para um dispositivo de aquecimento

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB696380A (en) * 1949-11-25 1953-08-26 Junkers & Co Improvements in heat exchange apparatus
DE2813747A1 (de) * 1978-03-30 1979-10-04 Thermal Waerme Kaelte Klima Waermetauscherlamelle und anwendungen derselben
US4738225A (en) * 1987-06-03 1988-04-19 Juang Jinn C Heat transfer apparatus for water heater
AT391022B (de) * 1987-11-03 1990-08-10 Vaillant Gmbh Waermetauscher

Also Published As

Publication number Publication date
DE4042195A1 (de) 1992-07-02
PT99947B (pt) 1999-05-31
DE59106481D1 (de) 1995-10-19
ES2077142T3 (es) 1995-11-16
ES2077142T5 (es) 1998-06-16
PT99947A (pt) 1993-11-30
EP0493665B1 (fr) 1995-09-13
EP0493665A3 (en) 1992-11-19
EP0493665A2 (fr) 1992-07-08

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