EP0467250A1 - Tuyau plat de tirage pour gaz de chauffage - Google Patents

Tuyau plat de tirage pour gaz de chauffage Download PDF

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Publication number
EP0467250A1
EP0467250A1 EP91111719A EP91111719A EP0467250A1 EP 0467250 A1 EP0467250 A1 EP 0467250A1 EP 91111719 A EP91111719 A EP 91111719A EP 91111719 A EP91111719 A EP 91111719A EP 0467250 A1 EP0467250 A1 EP 0467250A1
Authority
EP
European Patent Office
Prior art keywords
ribs
pocket
wall
heizgaszugtasche
gas
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Withdrawn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
EP91111719A
Other languages
German (de)
English (en)
Inventor
Hans Dr. Viessmann
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 EP0467250A1 publication Critical patent/EP0467250A1/fr
Withdrawn legal-status Critical Current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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular element

Definitions

  • the invention relates to a Walkergaszugtasche, in particular for condensing boilers of lower power with an atmospheric or gas fan burner according to the preamble of the main claim.
  • the invention is therefore based on the object of creating a heating gas draw-in pocket which can be produced at reasonable cost, which, despite the small boiler dimensions, has a sufficiently large heat transfer area and which ensures that the boilers equipped therewith can be operated as so-called condensing boilers.
  • This design according to the invention is therefore neither corrugated sheet metal bent or pressed sheet metal walls nor, for example, heat transfer surfaces produced by the continuous casting process, which would have a wall thickness which is much too great for the present purpose, but wall sheets which are produced by extrusion, that is to say a relatively strong sheet metal (stainless steel, copper, light metal, e.g. 3 mm thick) as the original starting material is significantly reduced in wall thickness by extrusion with formation of the gas-side ribs and water-side waves, whereby the ribs and grooves also have a corresponding wall thickness by the extrusion ( approx.
  • wall plates can be produced for the formation of the pocket, which, measured from the rib ends on the gas side to the level in which the wave maxima lie on the water side, a total thickness of approx. 5 mm, where di e small ribs parallel to each other have a distance that corresponds approximately to their height. It is practically not possible to achieve this with folding deformations of a thin-walled sheet metal from the outset, quite apart from the fact that this did not result in solid ribs, but only double-layered folding ribs.
  • heating gas draw pockets formed from such wall plates have gas-side ribs and water-side grooves, which will be shown in detail in the following, i.e. do not have a corrugated-sheet-like shape, but thanks to the extrusion production have practically the same small wall thickness as they previously had corrugated-sheet-shaped wall plates, this ensures that due to the fins correspondingly enlarged heat exchange surface does not assume a significantly higher temperature than the boiler water, but this ensures that a small heating boiler equipped with such heating gas pockets can also be optimally operated as a condensing boiler.
  • Another advantage associated with the simultaneous extrusion with wave-like grooves produced in the area between two rib feet is that a turbulent flow of water can be generated on the water side, which would not be possible at all to pockets with smooth inner surfaces and only attached ribs and which is not attainable to such a high degree in the case of sheet metal walls of the pockets which are deformed like corrugated sheet metal, since the wave deformations there must be correspondingly larger.
  • the Schushiffy consists of two parallel and liquid-tight along two opposite edges connected with each other and the water-bearing interior 5 'to the inflow and outflow opening wall panels 4, which are provided with wave-like, parallel embossments.
  • the embossments are formed as extruded embossments from outwardly directed, gas-side, parallel ribs 1 on the wall plate 4, to which water side in the area under the respective rib feet 2 (see FIG. 2) corresponding grooves 3 are formed in the wall plates 4 of the pocket, the depth T of the grooves being smaller than the height H of the ribs and furthermore the distance A (see FIG.
  • the height H of the ribs 1 is the same or approximately the same as one another.
  • a hot gas draft pocket 5 formed from two such wall plates is shown in the sense of FIG. 4.
  • the left-hand sides of the sectional representations in FIGS. 1, 2 illustrate the thickness of the plate before the extrusion deformation, which in the end results in a shaping of the sheets according to the right side of FIGS. 1, 2, ie, di
  • the original thickness of the starting plate which, as mentioned above, can be, for example, 3 to 4 mm, is reduced considerably, so that the wall thickness of the deformed wall plates is only about 1 mm, as it is for known Schugaszugtaschen are common, which consist of corrugated sheet metal wall plates.
  • the extrusion deformation of the wall sheets 4 in the sense of FIGS. 1, 2 is carried out with suitable shaping tools on appropriately dimensioned sheet metal blanks, but it is also possible to effect this deformation in a continuous manner by means of appropriately profiled rollers.
  • the course of the direction of the mutually parallel ribs 1 and grooves 3 is preferably made inclined with respect to the cutting edges, the two wall plates 4 forming a pocket 5 then being joined together in such a way that the course of inclination of the ribs and grooves is directed in the opposite direction to the other sheet is.
  • the water-side wave maxima M lie in a plane E which corresponds to the original plane Ei of the undeformed wall sheets 4 used as the starting material.
  • the extrusion molding is brought about in such a way that the embossed ribs 1 protrude with their ends 1 ′ over the plane E2 of the undeformed wall sheets 4.
  • the thickness S 1 of both the ribs and the thickness of the sheet in the area of the grooves 3 is likewise only about 1 mm, the grooves being in the form of waves.
  • FIGS. 5, 6 The sheet metal walls 4 joined together to form a pocket 5 are shown in FIGS. 5, 6.
  • the pocket 5 is provided with inlet and outlet connections 9 with which the pocket is appropriately integrated into the boiler structure .
  • the pocket or several such pockets in the sense of FIG. 4 are integrated into corresponding connecting walls 10 of the boiler construction.
  • the two wall sheets 4 are formed from a sheet metal blank, into which the ribs 1 and grooves 3 are molded in two spaced groups G while keeping the edges R free by extrusion, as mentioned above.
  • the sheet metal blank Z is then bent along the line 12 with suitable auxiliary tools, so that the previously bent edges 13 collide and can be connected in a liquid-tight manner at 11 with a longitudinal weld seam.
  • the use of such a pocket in the boiler construction one of which is illustrated, for example, in FIG. 13, then takes place in the sense of FIGS. 6, 7.
  • the pockets can also be easily assembled from two separate wall plates 4, in which case the upper and lower edge regions 14 in the sense of FIG. 8, of course without the connections 9 indicated there, are closed in a liquid-tight manner.
  • a boiler with an atmospheric burner arranged under the heat exchanger in the form of heating gas draw pockets 5, in which the heating gas pockets described above can of course also be used. If such small boilers are to be operated as so-called condensing boilers, suitable and known measures must be taken to ensure that either condensate dripping does not get onto the burner or the burner tubes, or that the burner (then as a gas blower burner) is arranged at a suitable distance above the heating gas pockets 5 .
  • FIGS. 10-12 differ from the ones described above in that in this case the pockets 5 are wound spirally, which basically has the advantage that the surrounding boiler housing (not shown) can be designed cylindrically, combined with the advantage of more favorable compressive strength and a more complex manufacturing.
  • Such spiral heat exchangers are known in the basic principle. Apart from the fact that such a spiral-shaped pocket 5 'on the inlet and outlet sides for the heat transfer medium to be passed through can be incorporated in a suitable manner and as described above in a boiler housing, it is also possible, as shown, the single-stranded (Fig. 10) or the to insert two-strand pocket 5 "(FIG.
  • the distances A of the ribs 1 on the wall panels 4 forming the pockets are each dimensioned so differently in order to ensure that the ribs are distributed as evenly as possible and that the heat transfer conditions are as uniform as possible at all points and also in consideration of the required curvature that the outwardly pointing ribs of the respective inner pocket strand 7, as seen in section (see FIG.

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  • 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)
EP91111719A 1990-07-17 1991-07-13 Tuyau plat de tirage pour gaz de chauffage Withdrawn EP0467250A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904022730 DE4022730A1 (de) 1990-07-17 1990-07-17 Heizgaszugtasche
DE4022730 1990-07-17

Publications (1)

Publication Number Publication Date
EP0467250A1 true EP0467250A1 (fr) 1992-01-22

Family

ID=6410456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111719A Withdrawn EP0467250A1 (fr) 1990-07-17 1991-07-13 Tuyau plat de tirage pour gaz de chauffage

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EP (1) EP0467250A1 (fr)
DE (1) DE4022730A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0813037A1 (fr) * 1996-05-31 1997-12-17 VIESSMANN WERKE GmbH & CO. Echangeur de chaleur, en particulier pour une chaudière
EP0971195A2 (fr) * 1998-07-06 2000-01-12 Fontecal S.p.A. Echangeur de chaleur gaz-eau perfectionné
EP0851200B2 (fr) † 1996-12-24 2010-03-17 Behr GmbH & Co. KG Procédé pour la réalisation de languettes et/ou de saillies sur une tôle mince, tôle mince avec languettes et/ou saillies et tube en tôle mince à section rectangulaire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10226641B4 (de) * 2002-06-14 2004-11-04 Rohde & Schwarz Ftk Gmbh Wärmetauscher-Element und Verfahren zum Herstellen eines Wärmetauscher-Elements
DE102007023051A1 (de) * 2007-05-15 2008-11-20 Martin Ahrends Kessel mit Brennmaterial aufnehmenden Brennraum

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028830A1 (fr) * 1979-11-12 1981-05-20 Huber, Markus Gerätebau Chaudière de chauffage central avec des surfaces chauffantes en spires ajustables sans intervalles et avec nettoyage opérable de l'extérieur
EP0102407A1 (fr) * 1982-09-03 1984-03-14 Wieland-Werke Ag Tube à ailettes avec protubérances internes et procédé et dispositif de fabrication
JPS60144595A (ja) * 1984-01-06 1985-07-30 Mitsubishi Heavy Ind Ltd 熱交換器の伝熱管構造
EP0321667A1 (fr) * 1987-12-22 1989-06-28 Hans Dr. Viessmann Chaudière

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT576251A (fr) * 1957-08-01
SE357055B (fr) * 1971-10-11 1973-06-12 Alfa Laval Ab

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028830A1 (fr) * 1979-11-12 1981-05-20 Huber, Markus Gerätebau Chaudière de chauffage central avec des surfaces chauffantes en spires ajustables sans intervalles et avec nettoyage opérable de l'extérieur
EP0102407A1 (fr) * 1982-09-03 1984-03-14 Wieland-Werke Ag Tube à ailettes avec protubérances internes et procédé et dispositif de fabrication
JPS60144595A (ja) * 1984-01-06 1985-07-30 Mitsubishi Heavy Ind Ltd 熱交換器の伝熱管構造
EP0321667A1 (fr) * 1987-12-22 1989-06-28 Hans Dr. Viessmann Chaudière

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 307 (M-435)(2030) 4. Dezember 1985 & JP-A-60 144 595 (MITSUBISHI JUKOGYO K.K. ) 30. Juli 1985 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0813037A1 (fr) * 1996-05-31 1997-12-17 VIESSMANN WERKE GmbH & CO. Echangeur de chaleur, en particulier pour une chaudière
EP0851200B2 (fr) † 1996-12-24 2010-03-17 Behr GmbH & Co. KG Procédé pour la réalisation de languettes et/ou de saillies sur une tôle mince, tôle mince avec languettes et/ou saillies et tube en tôle mince à section rectangulaire
EP0971195A2 (fr) * 1998-07-06 2000-01-12 Fontecal S.p.A. Echangeur de chaleur gaz-eau perfectionné
EP0971195A3 (fr) * 1998-07-06 2000-08-02 Fontecal S.p.A. Echangeur de chaleur gaz-eau perfectionné

Also Published As

Publication number Publication date
DE4022730A1 (de) 1992-01-23

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