EP0532051A1 - Echangeur de chaleur avec des ailettes à lamelle - Google Patents

Echangeur de chaleur avec des ailettes à lamelle Download PDF

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Publication number
EP0532051A1
EP0532051A1 EP92115721A EP92115721A EP0532051A1 EP 0532051 A1 EP0532051 A1 EP 0532051A1 EP 92115721 A EP92115721 A EP 92115721A EP 92115721 A EP92115721 A EP 92115721A EP 0532051 A1 EP0532051 A1 EP 0532051A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
fins
finned heat
exchanger according
tubes
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.)
Granted
Application number
EP92115721A
Other languages
German (de)
English (en)
Other versions
EP0532051B1 (fr
Inventor
Peter Goebel
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.)
N.V. VAILLANT S.A.
Vaillant Austria GmbH
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Original Assignee
Vaillant Austria GmbH
Nv Vaillant Sa
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
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 Vaillant Austria GmbH, Nv Vaillant Sa, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd filed Critical Vaillant Austria GmbH
Publication of EP0532051A1 publication Critical patent/EP0532051A1/fr
Application granted granted Critical
Publication of EP0532051B1 publication Critical patent/EP0532051B1/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
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • 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
    • 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

Definitions

  • the invention relates to a finned heat exchanger with tubes arranged in at least one row and flowing through by a fluid to be heated, which pass through the fins arranged parallel to one another and which are exposed to a flue gas stream originating from a burner.
  • rectangular fins are mostly provided, which, with the exception of the areas directly surrounding the tubes, which are provided with a substantially cylindrical flange and an angled edge area, are flat. This results in channels between the lamellae which have a constant internal width throughout.
  • the aim of the invention is to avoid these disadvantages and to propose a finned heat exchanger of the type mentioned at the beginning in which the formation of dead spaces is avoided.
  • this is achieved in that in the region of the edge of the fins located downstream of the flue gas flow, open embossments towards it or cross-sectionally substantially U-shaped bends are provided in sections, which are arranged between the row of tubes closest to this edge of the fins .
  • the depth of the impressions increases towards the edge of the fins located downstream of the flue gas flow and that the outlet cross section lies in the shadow of the pipes themselves.
  • the impressions have a substantially circular cross-section.
  • impressions correspond to part of a cone shell and slightly overlap one another.
  • the impressions correspond to a part of a cone shell, the height of which is designed to be half the distance, and that a triangular surface is punched out of the lamella.
  • the bends delimit essentially triangular incisions arranged at the lower edge of the slats.
  • a finned heat exchanger in which the tubes pass through circumferential bores provided with cross-sections which are essentially U-shaped, it can be provided according to a further feature of the invention that the resultant between the tubes and the collars or the fins lying against them Caverns are filled with a resin.
  • the lamellae are provided with depressions which extend as far as the caverns.
  • the collars which are U-shaped in cross section are flared at a small angle, for example approximately 3 °.
  • the plate pack can be pressed together, the plates resting resiliently on the adjacent plates or their collars.
  • fins 3 are held, which are penetrated by tubes 4 arranged in two rows running one below the other.
  • the heat exchanger formed by the tubes 4 and the fins 3 is acted upon by the flames 11 of a gas-blown tumble burner 10.
  • incisions 7 which are arranged centrally between the tubes 4 forming the upper row also facing the lintel burner. The incisions bring about an equalization of the temperature distribution in the individual fins 3.
  • impressions 8 are arranged, the depth of these impressions 8 increasing towards the edge of the fins 3 and being open at the edge, as can be seen from FIG remaining outlet cross section is in the shadow of the pipes of the upper row of pipes.
  • the tubes 4 are held in bores of the lamellae 3 which have a substantially U-shaped collar 6 in cross section, these simultaneously serving as spacers for determining the distance between the individual lamellae 3.
  • 4 displacers 5 are arranged inside the lower tubes.
  • the collars 6 are flared by a small angular amount, for example approximately 3 °. H. they deviate from a parallel position in relation to the plane of the lamella 3. This results in a certain spring effect and the entire package of the slats 3 can be pressed together, whereby the collars 6 of the slats 3 lie essentially close to the respectively adjacent slat 3.
  • the tubes 4, which are arranged in the two rows, are offset from one another, so that the cuts 7 aligned with the tubes of the lower row of tubes and the impressions 8 are also offset from one another.
  • the flue gases 12 are deflected by the impressions 8, so that they flow around the pipes 4 in a large angular range and therefore their heat to a large extent to the pipes 4 or the heating or flowing in them Dispense hot water.
  • FIG. 4 shows the design of the edge region 9 of the heat exchanger or its fins 3.
  • the edges 9 of the fins 3 are angled, the edges 9 of the fins 3 resting against one another and resulting in cavities 13 through which flue gases can flow.
  • the lamella heat exchanger according to FIG. 5 differs from that according to FIG. 1 in that, instead of the impressions 8, 3 cuts 7, 7 'are arranged on both edges of the fins, which run essentially transversely to the flow direction of the flue gases 12. Bends 20 are arranged at the lower edge of the slats 3, which surround the incisions 7 'and divide the flue gas flow in the same way as the impressions 8 according to FIG. 1.
  • the smoke gases 12 are deflected by the impressions 8, so that they flow around the pipes 4 in a large angular range and therefore their heat to a large extent to the pipes or to the heating or process water led into them submit. If the condensate accumulates due to the temperature, the flue gas flow and the condensate are led out of the heat exchanger separately depending on the degree of wetting of the heat exchanger. Condensate will escape through the open area under the pipes and the flue gas through the triangular open areas 7 in the indentations 8 or in the area between the adjacent pipes of the lower row of pipes. This prevents the resulting condensate from clogging the heat exchanger, the pressure loss across the heat exchanger increasing on the flue gas side, and the area blocked by condensate leading to severe heat transfer losses.
  • FIGS. 6 and 7 show details of the fins 3.
  • the fins 3 are provided in the vicinity of the collars 6 with depressions 15 which run essentially radially to the bores for receiving the tubes 4 and extend into the region through which the collars 6 conditional caverns 14, which is delimited by the corresponding tube 4, the collar 6 of the one lamella 3 and the second lamella 3 resting on this collar 6.
  • These caverns 14 are filled with a resin or lacquer which can be introduced into the caverns 14 via the depressions 15.

Landscapes

  • 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)
  • Fuel Cell (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Defrosting Systems (AREA)
EP92115721A 1991-09-12 1992-09-14 Echangeur de chaleur avec des ailettes à lamelle Expired - Lifetime EP0532051B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1828/91 1991-09-12
AT0182891A AT396981B (de) 1991-09-12 1991-09-12 Lamellenwärmetauscher

Publications (2)

Publication Number Publication Date
EP0532051A1 true EP0532051A1 (fr) 1993-03-17
EP0532051B1 EP0532051B1 (fr) 1996-09-25

Family

ID=3521866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92115721A Expired - Lifetime EP0532051B1 (fr) 1991-09-12 1992-09-14 Echangeur de chaleur avec des ailettes à lamelle

Country Status (3)

Country Link
EP (1) EP0532051B1 (fr)
AT (2) AT396981B (fr)
DE (2) DE59207235D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467169A3 (fr) * 2003-04-08 2011-07-20 Robert Bosch Gmbh Echangeur de chaleur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1295238B1 (it) * 1997-09-29 1999-05-04 Ferroli Spa Caldaia perfezionata premiscelata a condensazione,particolarmente idonea alla produzione di acqua sanitaria e per riscaldamento
NL2014432B1 (en) * 2015-03-10 2017-01-06 Atag Verwarming Nederland B V Heat exchanger and assembly of a heat exchanger and a burner.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2412430A1 (de) * 1974-03-15 1975-09-25 Vaillant Joh Kg Waermetauscher
FR2346660A1 (fr) * 1976-03-31 1977-10-28 Volkswagenwerk Ag Echangeur tubulaire
US4279298A (en) * 1980-03-17 1981-07-21 Borg-Warner Corporation Heat exchanger with condensate blow-off suppressor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3219099C2 (de) * 1982-05-18 1985-05-02 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Wärmetauscher
DE3515426A1 (de) * 1985-04-29 1986-10-30 Fritz 7500 Karlsruhe Schwenkler Waermeaustauscher

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2412430A1 (de) * 1974-03-15 1975-09-25 Vaillant Joh Kg Waermetauscher
FR2346660A1 (fr) * 1976-03-31 1977-10-28 Volkswagenwerk Ag Echangeur tubulaire
US4279298A (en) * 1980-03-17 1981-07-21 Borg-Warner Corporation Heat exchanger with condensate blow-off suppressor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 330 (M-442)25. Dezember 1985 & JP-A-60 162 193 ( AKACHI HISATERU ) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467169A3 (fr) * 2003-04-08 2011-07-20 Robert Bosch Gmbh Echangeur de chaleur

Also Published As

Publication number Publication date
AT396981B (de) 1994-01-25
DE9212347U1 (fr) 1992-10-29
DE59207235D1 (de) 1996-10-31
ATA182891A (de) 1993-05-15
EP0532051B1 (fr) 1996-09-25
ATE143478T1 (de) 1996-10-15

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