EP0545954B1 - Chauffe-eau a gaz - Google Patents

Chauffe-eau a gaz Download PDF

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Publication number
EP0545954B1
EP0545954B1 EP91914090A EP91914090A EP0545954B1 EP 0545954 B1 EP0545954 B1 EP 0545954B1 EP 91914090 A EP91914090 A EP 91914090A EP 91914090 A EP91914090 A EP 91914090A EP 0545954 B1 EP0545954 B1 EP 0545954B1
Authority
EP
European Patent Office
Prior art keywords
lamina
water
end lamina
water pipes
water heater
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
EP91914090A
Other languages
German (de)
English (en)
Other versions
EP0545954A1 (fr
Inventor
Walter Kohl
Peter Reicherter
Ernst Schmidt
Manfred Seebauer
Günter Weber
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0545954A1 publication Critical patent/EP0545954A1/fr
Application granted granted Critical
Publication of EP0545954B1 publication Critical patent/EP0545954B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • 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
    • F28F1/30—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 being attachable to the element
    • 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

Definitions

  • the invention is based on a gas-heated water heater according to the preamble of the main claim.
  • a known water heater of this type both end lamella parts of an end lamella are provided on the upstream side with an angled edge strip and are firmly connected to one another by welding.
  • a sufficiently dimensioned space must be provided between the end fins and the adjacent water chambers so that the edges of the base parts and cover parts of the water chambers to be soldered or welded remain easily accessible by the soldering or welding device and are not covered by the angled edge strips of the end fins become.
  • This increased space requirement causes a broadening of the heat exchanger, which does not affect the performance of the device and only increases its manufacturing costs.
  • a water heater which has become known which has a heat exchanger, the frame of which is composed of individual sheet metal strips, which are attached to these after complete soldering of the lamella block and are connected to one another by tab closures. At its ends, the heat exchanger only has water-deflecting elbows.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that the two Parts of a water chamber, connection and deflection chamber can be connected to each other without hindrance by the angled edge strips of the end lamellae, so that the water chambers move closer to the end lamellae and as a result the heat exchanger can be made shorter overall with the same output than in the known devices of the generic type.
  • the second end lamella part is simply pushed onto the first end lamella part from below until the latching means engage and connect the two end lamella parts with the necessary strength.
  • the end plates according to the invention are also more elastic due to the locking connection of their two parts than the known end plates with welded plate parts, so that the forces exerted by the end plates designed according to the invention on the water chambers due to different thermal expansions are lower than the forces exerted by the end plates of the known type.
  • the latching means for connecting the first and second end lamella parts between the passages or recesses for the water pipes are provided on the two end lamella parts, the latching means can be dimensioned sufficiently large without additional space requirement for proper functioning.
  • the second end lamella part is provided with tabs which extend between the water pipes and cover the slots on the first end lamella part, from which locking tongues are brought out, which are located behind locking shoulders on the first end lamella part grip which are formed on the edge edges of the tabs of the first end lamella part which play without tabs.
  • the end lamellae of which are provided on the outflow side with an edge leg emerging from the lamella plane, which serves as a support or guide for flow protection or the like, it is proposed that the upper edge leg be formed on a third end lamella part, which is also only formed by Locking means is connected to the first end plate part.
  • edge leg of an end lamella provided on the outflow side does not hinder the production of the adjacent water chamber and, moreover, does not adversely affect the thermal expansion capacity or the "softness" of the end lamella.
  • FIG. 1 shows a partial area of a heat exchanger and a combustion shaft of a gas-heated water heater, partly in side view and partly in section
  • FIG. 2 shows a section of a first end lamella part of the heat exchanger according to FIG. 1 in side view
  • FIGS. 3 and 4 show sections along lines III-III and IV-IV in Figure 2
  • Figures 5 and 6 sections of a second and a third end lamella part in side view
  • a water heater has a combustion shaft 10, on which a heat exchanger, designated as a whole with reference number 12, is placed and held in place by means not visible in the drawing.
  • the heat exchanger 12 has a lamella block consisting of individual fins 14, through which a plurality of water pipes 16 arranged parallel to one another are passed.
  • the individual fins 14 can consist of copper or stainless steel and are between the passages provided for the water pipes 16 with pleats to increase the thermal expansion or "softness".
  • the water pipes 16 open out on both sides in water chambers 18, which are each formed from a base part 20 and a cover part 22.
  • the two parts 20, 22 are connected to one another at their flat edges 20a, 22a by soldering or welding.
  • the heat exchanger 12 is provided with end fins 24 made of stainless steel, as described in more detail below, from three individual parts, which are provided at the bottom with an edge strip 26 angled from the lamella plane and at the top with an obliquely angled edge leg 28. With the edge strip 26, the heat exchanger 12 is centered on the combustion shaft 10.
  • the edge leg 28 forms a guide and a support for a flow safety device, which can be pushed onto the heat exchanger 12 from the front.
  • the end fins 24 have in addition to these load-bearing and centering functions to seal the path of the combustion gases to the sides and must also be designed so that they do not exert unacceptably high thermal expansion forces on the adjacent water chambers 18 despite the required mechanical strength.
  • Each end lamella 24 consists of a first end lamella part 30 (FIG. 2) which is provided with openings 34 for the water pipes 16 which are surrounded by collars 32 and is welded to them.
  • the end lamella part 30 is also between the openings 34 Provided from the lower edge 36 slots 38, which result in the required "softness" of the end lamella 24.
  • two tabs 40 are protruded from the end lamella part 30, which lie opposite one another in pairs and form an insertion channel 42 between them and the adjacent, undeformed lamella areas.
  • further insertion channels 44 are provided in the upper region of the end lamella part 30, which are formed by webs 46 made out of the flat lamella material.
  • the first end lamella part 30 is completely flat, so that after completion of the entire end lamella parts 30 with extensive lamella blocks, the parts 20, 22 forming the water chambers 16 can be soldered or welded to one another without hindrance.
  • the lower edge strip 26 of an end lamella 24 is formed on a second end lamella part 50 (FIG. 5) which is provided with cutouts 52 open at the top for the water pipes 16. Between the cutouts 52, alternately and at the same pitch as the slots 38 on the first end lamella part 30, narrower tabs 54 and wider tabs 56 are formed. From the narrower tabs 54 downward facing latching tongues 58 are highlighted. The tabs 54 are dimensioned such that they can be inserted in a suitable manner into the insertion channels 42 of the first end lamella part 30.
  • the second end lamella parts 50 are after the manufacture of what serhunt 18 simply pushed from below onto the first end lamella parts 30 so that the tabs 54 enter the insertion channels 42 and the tabs 58 finally catch behind the upper edge 59 of the tabs 40. Then the second lamella parts 50 are firmly attached to the first end lamella parts 30, the tabs 54 and 56 covering their slots 38 from the inside except for a short upper area in the manner of a labyrinth seal.
  • the upper edge leg 28 of an end plate 24 is formed on a third end plate part 60 (FIG. 6). Analogous to the second end lamella part 50, this is provided with recesses 62 which are open at the bottom for the water pipe 16 and with tabs 64, 66. The narrower tabs 64 have tongues 68 pointing upward and are dimensioned such that they can be inserted appropriately into the insertion channels 44 of the first lamella part 30.
  • the third end lamella parts 60 are simply plugged onto the first end lamella parts 30 from above such that the tabs 64 enter the insertion channels 44 and the tongues 68 finally engage behind the lower edge edges 69 of the webs 46. Thereafter, the third end lamella parts 60 are also firmly attached to the first end lamella parts 30, the tabs 64, 66 covering the upper regions of the slots 38 from the outside in the manner of a labyrinth seal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (AREA)

Abstract

Dans des chauffe-eau du type décrit, les lamelles terminales en acier spécial sont formées de deux parties mutuellement reliées de manière fixe, de sorte que les cordons de soudure des chambres à eau (18) doivent être latéralement décalées par rapport aux bandes marginales (26) des lamelles terminales afin d'être accessibles à l'appareil de soudage. L'insertion des parties (30, 50, 60) qui forment les lamelles terminales permet d'ajouter les bandes marginales (26, 28) après le montage des chambres à eau (28), de sorte que celles-ci peuvent être rapprochées du bloc de lamelles de l'échangeur de chaleur, qui peut ainsi être réduit de manière à diminuer les coûts. Le domaine préféré d'application est constitué par les chauffe-eau à gaz servant à l'alimentation en eau chaude et au chauffage central.

Claims (4)

  1. Chauffe-eau à gaz dans lequel :
    - l'échangeur de chaleur (12) est un bloc de lamelles traversées par des tubes d'eau qui débouchent dans des chambres à eau (18) constituées chacune d'un fond (20), fixé aux tubes d'eau et d'un couvercle (22) dont le bord est relié à celui du fond (20) par brasage ou soudage,
    - l'échangeur (12) est muni, à chaque extrémité, près d'une chambre à eau, d'une lamelle (24), en acier spécial de préférence, présentant un rebord (26) sous forme d'une bande en déport par rapport au plan de la lamelle,
    - les lamelles d'extrémité comportent chacune deux parties, une première (30) solidarisée de manière étanche aux tubes d'eau, ainsi qu'une seconde partie (50) liée à la première,
    caractérisé en ce que :
    a) la seconde partie (50) de la lamelle d'extrémité est reliée à la première partie des lamelles d'extrémité (30), simplement par des organes d'arrêt (58, 59),
    b) seule la seconde partie (50)des lamelles d'extrémité porte un rebord constitué d'une bande (26) déportée par rapport au plan de la lamelle,
    c) la seconde partie (50) des lamelles d'extrémité, qui présente des encoches ouvertes vers le haut pour le passage de tubes d'eau (16), est glissée par le bas sur la première partie (30) de la lamelle d'extrémité.
  2. Chauffe-eau selon la revendication 1, comportant une première partie des lamelles d'extrémité, entre les passages des tubes d'eau, par des fentes augmentant l'élasticité, caractérisé en ce que les organes d'arrêt (58, 59) assurant la liaison de la première et de la seconde partie (30, 50)des lamelles d'extrémité sont prévus entre les passages (34) et encoches (52) destinés aux tubes d'eau dans les deux parties (30, 50) respectivement.
  3. Chauffe-eau selon la revendication 2, caractérisé en ce que la seconde partie (30) des lamelles d'extrémité est équipée de languettes passant entre les tubes (16) et recouvrant au moyen partiellement des fentes (38) de la première partie (30) des lamelles d'extrémité, ces languettes portant, en saillie, des becs d'arrêt (58) venant se bloquer derrière des épaulements (59) de la première partie (30), constitués par les bords des pattes (40) des premières languettes d'extrémité assurant le guidage sans jeu des languettes (54).
  4. Chauffe-eau selon une des revendications précédentes, dans lequel les lamelles d'extrémité situées du côté sortie de l'écoulement sont équipées d'un rebord en déport vis-à-vis du plan de la lamelle et servant de support ou de guidage à un organe assurant la sécurité de l'écoulement ou analogue, caractérisé en ce que le rebord (28) est porté par une troisième partie (60) des lamelles d'extrémité, liée également à la première partie des lamelles d'extrémité (30), simplement par des organes d'arrêt (68, 69).
EP91914090A 1990-09-05 1991-08-13 Chauffe-eau a gaz Expired - Lifetime EP0545954B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4028081 1990-09-05
DE4028081A DE4028081A1 (de) 1990-09-05 1990-09-05 Gasbeheizter wassererhitzer
PCT/DE1991/000644 WO1992004583A1 (fr) 1990-09-05 1991-08-13 Chauffe-eau a gaz

Publications (2)

Publication Number Publication Date
EP0545954A1 EP0545954A1 (fr) 1993-06-16
EP0545954B1 true EP0545954B1 (fr) 1995-05-17

Family

ID=6413605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91914090A Expired - Lifetime EP0545954B1 (fr) 1990-09-05 1991-08-13 Chauffe-eau a gaz

Country Status (4)

Country Link
EP (1) EP0545954B1 (fr)
DE (2) DE4028081A1 (fr)
PT (1) PT98852B (fr)
WO (1) WO1992004583A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI111029B (fi) 1998-09-09 2003-05-15 Outokumpu Oy Lämmönvaihtoyksikkö ja käyttö
PL221028B1 (pl) * 2011-06-24 2016-02-29 Aic Spółka Akcyjna Pakiet rurowy wymiennika ciepła

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1028401A (fr) * 1949-11-25 1953-05-22 Dessa Warmegerate G M B H échangeur de chaleur
US3792729A (en) * 1972-07-07 1974-02-19 R Perry Heat exchanger
DE2742854C2 (de) * 1977-09-23 1985-05-02 Robert Bosch Gmbh, 7000 Stuttgart Wassererhitzer mit einem Gas- oder Ölbrenner

Also Published As

Publication number Publication date
DE4028081A1 (de) 1992-03-12
PT98852B (pt) 1999-01-29
EP0545954A1 (fr) 1993-06-16
WO1992004583A1 (fr) 1992-03-19
PT98852A (pt) 1993-11-30
DE59105537D1 (de) 1995-06-22

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