EP0024381A2 - Floating heat exchanger for a combustion heater - Google Patents

Floating heat exchanger for a combustion heater Download PDF

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Publication number
EP0024381A2
EP0024381A2 EP80810256A EP80810256A EP0024381A2 EP 0024381 A2 EP0024381 A2 EP 0024381A2 EP 80810256 A EP80810256 A EP 80810256A EP 80810256 A EP80810256 A EP 80810256A EP 0024381 A2 EP0024381 A2 EP 0024381A2
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EP
European Patent Office
Prior art keywords
exchanger
combustion chamber
free space
exchanger according
double wall
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EP80810256A
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German (de)
French (fr)
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EP0024381A3 (en
Inventor
Claude Hays
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EVITHERM SA
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EVITHERM SA
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Publication date
Application filed by EVITHERM SA filed Critical EVITHERM SA
Publication of EP0024381A2 publication Critical patent/EP0024381A2/en
Publication of EP0024381A3 publication Critical patent/EP0024381A3/en
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    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • 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
    • F24H2230/00—Solid fuel fired boiler

Definitions

  • the invention relates to generators of hot fluids such as water, steam, air or others, and particularly generators where the fluid follows a circuit in which it is separated from the production of heat which has its seat in a room combustion, therefore fuel boilers. It relates more precisely to a heat exchanger between the gases produced by combustion and the fluid to be heated which circulates in a blade forming a wall and eliminating the combustion chamber.
  • the object of the invention is to overcome these drawbacks while considerably improving the thermal efficiency compared to known exchanger boilers.
  • the expansion problems are solved by the shape of the exchanger, in one or more (advantageously two) distinct and separate parts, and fixed on one side therefore cantilevered.
  • a baffle device increases the path of the fluid to be heated, therefore the effective exchange surface.
  • the external profile, both transverse and longitudinal of each of the parts of the exchanger is shaped so as to facilitate the evacuation of the combustion gases while increasing their travel at the level of the exchange surfaces.
  • the boiler shown in the drawings conventionally comprises a combustion chamber 1, limited below in the particular case which is illustrated, by a grid 2 serving to support a solid fuel. What will be explained in relation to this particular case can still be applied by analogy mutatis / with some small modifications in the case of the use of a liquid or gaseous fuel.
  • the combustion chamber 1 is moreover limited by a cylindrical casing 3 of longitudinal axis with double wall which closes it on the sides, as well as at the top and at the bottom, leaving under the grate 2 sufficient free space 4 for a good distribution of the air necessary for combustion.
  • the combustion chamber 1 is further closed at the end on the one hand by a front door 5 in which is formed at a level below that of the grate 2 an opening 6 for the supply of fresh air, and on the other hand part by a rear facade 7 in which is formed in the upper part a duct 8 for discharging the fumes.
  • a second evacuation duct 9 also crosses in the upper part and towards the rear the upper part of the double envelope 3.
  • the heat transfer fluid to be heated arrives at the bottom and preferably at the rear via an inlet duct 10 inside the double wall 3 and escapes from this envelope at the top and before 11 after having circulated in the form of a blade in the double wall 3 and absorbs the heat supplied by the radiation from the hearth and the licking of the internal wall of the casing 3 by the flames and products of combustion.
  • the boiler body which has just been described is also enclosed in a thermally insulating covering 12 itself contained in a sheet metal casing 13.
  • the exchanger 14 comprises two parts 15, 15 ′ shown symmetrical with respect to the vertical plane AA of the boiler and which in fact constitute two elementary exchangers each connected to one of the side faces of the double wall 3 and preferably about two thirds of the combustion chamber 1 above the grate 2, so as to be in communication with the interior of the double wall 3.
  • the median plane of each of the parts 15.15 ' is approximately horizontal, and these two parts 15.15' are separated from each other so as to provide a free space between them 16 by which the combustion gases can flow upwards.
  • the two parts 15, 15 ′ are cantilevered, since they are fixed only at one of their ends, so that the expansions which arise cause practically no stress in these parts. 15.15 ', the end near the median vertical plane being completely free or "floating".
  • This arrangement also presents an important additional advantage: the combustion products which rise by licking the lateral faces of the double wall 3 are diverted by the exchanger towards the free space 16 and their course in contact with the envelope of the heat-transfer fluid. is therefore extended, which greatly improves the efficiency of the heat exchange.
  • each part 15, 15 ′ of the exchanger 14 does not form a single blade extending in the upper region of the combustion chamber 1 but two adjacent blades (superimposed on the drawings).
  • the external faces 17, 18 of each part 15, 15 ′ are fixed to the internal face of the double wall 3 and, between them, a middle plate 19 is fixed to the external face of the double wall 3 while having its other end (on the side of the vertical median plane AA) free.
  • a middle plate 19 is fixed to the external face of the double wall 3 while having its other end (on the side of the vertical median plane AA) free.
  • the free space 16 between the two parts 15, 15 ′ will advantageously be slightly divergent from back to front, as illustrated in Figure 3.

Abstract

Exchanger (14) for a fuel boiler in which the fluid to be heated circulates in a double wall (3) forming a sheet and with which the exchanger (14) is in communication. It comprises two hollow symmetrical parts (15, 15') in the form of sheets which are arranged above or at the bottom of the combustion chamber (1), forming between them a free space (16), and connected on the opposite side to the internal face of the double wall (3). In each part (15, 15'), a central plate (19), fixed only to the external face of the double wall (3), makes it possible to form in the exchanger (14) two parallel fluid sheets which communicate with one another via a chicane (20). The invention is applied particularly to domestic or industrial boilers for hot water, steam, hot air or other fluid. <IMAGE>

Description

L'invention concerne les générateurs de fluides chauds comme l'eau, la vapeur, l'air ou autres, et particulièrement les générateurs où le fluide suit un circuit dans lequel il est séparé de la production de chaleur qui a son siège dans une chambre de combustion, donc les chaudières à combustibles. Elle est plus précisément relative à un échangeur de chaleur entre les gaz produits par la combustion et le fluide à chauffer qui circule dans une lame formant paroi et déliminant la chambre de combustion.The invention relates to generators of hot fluids such as water, steam, air or others, and particularly generators where the fluid follows a circuit in which it is separated from the production of heat which has its seat in a room combustion, therefore fuel boilers. It relates more precisely to a heat exchanger between the gases produced by combustion and the fluid to be heated which circulates in a blade forming a wall and eliminating the combustion chamber.

Dans les dispositifs connus de ce genre, notamment les chaudières domestiques ou industrielles, les gaz de combustion lèchent les parois de la chambre, chauffant ainsi la lame de fluide et s'échappent par un conduit de fumée alors qu'ils sont encore à haute température, d'où une perte importante d'énergie thermique. Une amélioration sensible a toutefois été apportée en forçant le fluide à chauffer à passer dans un organe supplémentaire qui accroît la surface d'échange entre les produits de combustion chauds et le fluide, cet échangeur étant de préférence disposé dans la partie supérieure de la chambre de combustion, en amont du conduit d'évacuation des produits de combustion(fumées). Le rendement thermique de l'installation est nettement amélioré, mais cependant, dans les solutions connues proposées, cet échangeur est d'une seule pièce et fixé rigidement de part et d'autre aux parois de la chambre de combustion, ce qui est souvent à l'origine de graves problèmes de dilatation qui réduisent la durée de vie de l'appareillage. Par ailleurs ces échangeurs sont souvent un obstacle, surtout à température modérée quand on est en phase de démarrage ou à bas régime, à une bonne évacuation des gaz de combustion, d'où un phénomène de bouchon ou blocage qui peut faire "tousser" la chaudière, et nuire au rendement de la combustion.In known devices of this kind, in particular domestic or industrial boilers, the combustion gases lick the walls of the chamber, thus heating the blade of fluid and escape through a smoke duct while they are still at high temperature. , hence a significant loss of thermal energy. A significant improvement has however been made by forcing the fluid to be heated to pass through an additional member which increases the exchange surface between the hot combustion products and the fluid, this exchanger preferably being arranged in the upper part of the combustion, upstream of the combustion products (smoke) evacuation pipe. The thermal efficiency of the installation is significantly improved, but however, in the known solutions proposed, this exchanger is in one piece and rigidly fixed on either side to the walls of the combustion chamber, which is often the origin of serious problems of expansion which reduce the lifespan of the apparatus. Furthermore, these exchangers are often an obstacle, especially at moderate temperature when one is in the start-up phase or at low speed, to good evacuation of the combustion gases, hence a plug or blocking phenomenon which can cause the cough to "cough". boiler, and adversely affect combustion efficiency.

L'invention a pour but de s'affranchir de ces inconvénients tout en améliorant considérablement le rendement thermique par rapport aux chaudières à échangeur connues. Les problèmes de dilatation sont résolus par la forme de l'échangeur, en une seule ou plusieurs(avantageusement deux) parties distinctes et séparées, et fixées d'un seul côté donc en porte-à-faux. Dans chacune des parties un dispositif à chicane augmente le parcours du fluide à chauffer donc la surface efficace d'échange. Par ailleurs le profil extérieur tant transversal que longitudinal de chacune des parties de l'échangeur, est conformé de manière à faciliter l'évacuation des gaz de combustion tout en augmentant leur parcours au niveau des surfaces d'échange.The object of the invention is to overcome these drawbacks while considerably improving the thermal efficiency compared to known exchanger boilers. The expansion problems are solved by the shape of the exchanger, in one or more (advantageously two) distinct and separate parts, and fixed on one side therefore cantilevered. In each of the parts, a baffle device increases the path of the fluid to be heated, therefore the effective exchange surface. Furthermore, the external profile, both transverse and longitudinal of each of the parts of the exchanger, is shaped so as to facilitate the evacuation of the combustion gases while increasing their travel at the level of the exchange surfaces.

Pour l'intelligence de la description qui suit, on se référera aux dessins parmi lesquels :

  • - la figure 1 est une vue schématique en coupe transversale selon le plan B-B(fig.2) d'une chaudière équipée d'un échangeur selon l'invention,
  • - la figure 2 est une vue schématique en coupe longitudinale selon le plan vertical de symétrie AA(fig.l) de la même chaudière, et
  • - la figure 3 une vue en coupe longitudinale selon le plan horizontal C-C(fig.2).
For the understanding of the description which follows, reference will be made to the drawings among which:
  • FIG. 1 is a schematic view in cross section along the plane BB (FIG. 2) of a boiler equipped with an exchanger according to the invention,
  • FIG. 2 is a schematic view in longitudinal section along the vertical plane of symmetry AA (FIG. 1) of the same boiler, and
  • - Figure 3 a longitudinal sectional view along the horizontal plane CC (fig.2).

La chaudière représentée aux dessins comprend de façon classique une chambre de combustion 1, limitée inférieurement dans le cas particulier qui est illustré, par une'grille 2 servant de support à un combustible solide. Ce qui va être exposé relativement à ce cas particu- utandis lier pourra encore s'appliquer par analogie mutatis/avec quelques petites modifications au cas de l'utilisation d'un combustible liquide ou gazeux. La chambre de combustion 1 est par ailleurs limitée par une enveloppe cylindrique 3 d'axe longitudinal à paroi double qui la ferme sur les côtés, de même qu'en haut et en bas en laissant sous la grille 2 un espace libre suffisant 4 pour une bonne répartition de l'air nécessaire à la combustion. La chambre de combustion 1 est en outre fermée en bout d'une part par une porte avant 5 dans laquelle est ménagée à un niveau inférieur à celui de la grille 2 une ouverture 6 pour l'amenée d'air frais, et d'autre part par une façade arrière 7 dans laquelle est ménagé en partie haute un conduit 8 d'évacuation des fumées. Un second conduit d'évacuation 9 traverse également en partie haute et vers l'arrière la partie supérieure de l'enveloppe double 3.The boiler shown in the drawings conventionally comprises a combustion chamber 1, limited below in the particular case which is illustrated, by a grid 2 serving to support a solid fuel. What will be explained in relation to this particular case can still be applied by analogy mutatis / with some small modifications in the case of the use of a liquid or gaseous fuel. The combustion chamber 1 is moreover limited by a cylindrical casing 3 of longitudinal axis with double wall which closes it on the sides, as well as at the top and at the bottom, leaving under the grate 2 sufficient free space 4 for a good distribution of the air necessary for combustion. The combustion chamber 1 is further closed at the end on the one hand by a front door 5 in which is formed at a level below that of the grate 2 an opening 6 for the supply of fresh air, and on the other hand part by a rear facade 7 in which is formed in the upper part a duct 8 for discharging the fumes. A second evacuation duct 9 also crosses in the upper part and towards the rear the upper part of the double envelope 3.

Le fluide caloporteur à chauffer arrive en partie basse et de préférence arrière par un conduit d'arrivée 10 à l'intérieur de la double paroi 3 et s'échappe de cette enveloppe en partie haute et avant 11 après avoir circulé sous forme de lame dans la double paroi 3 et absorbe la chaleur fournie par le rayonnement du foyer et le léchage de la paroi interne de l'enveloppe 3 par les flammes et produits de la combustion.The heat transfer fluid to be heated arrives at the bottom and preferably at the rear via an inlet duct 10 inside the double wall 3 and escapes from this envelope at the top and before 11 after having circulated in the form of a blade in the double wall 3 and absorbs the heat supplied by the radiation from the hearth and the licking of the internal wall of the casing 3 by the flames and products of combustion.

Le corps de chaudière qui vient d'être décrit est par ailleurs enfermé dans un habillage thermiquement isolant 12 lui-même contenu dans un carter de tôle 13.The boiler body which has just been described is also enclosed in a thermally insulating covering 12 itself contained in a sheet metal casing 13.

Ce qui vient d'être dit est classique et ne concerne que l'état da la technique, de même que la possibilité d'adjoindre un échangeur de chaleur disposé dans la chambre de combustion 1 et en communication avec le circuit du fluide caloporteur.What has just been said is conventional and relates only to the state of the art, as well as the possibility of adding a heat exchanger disposed in the combustion chamber 1 and in communication with the heat transfer fluid circuit.

Selon l'exemple d'exécution de l'invention illustré par les figures 1 à 3, l'échangeur 14 comprend deux parties 15,15' représentées symétriques par rapport au plan vertical A-A médian de la chaudière et qui constituent en fait deux échangeurs élémentaires raccordés chacun à une des faces latérales de la paroi double 3 et de préférence environ aux deux tiers de la chambre de combustion 1 au-dessus de la grille 2, et ce, de manière à être en communication avec l'intérieur de la paroi double 3. Le plan médian de chacune des parties 15,15' est approximativement horizontal, et ces deux parties 15,15' sont séparées l'une de l'autre de manière à ménager entre elles un espace libre 16 par lequel les gaz de combustion peuvent s'écouler vers le haut.According to the embodiment of the invention illustrated in FIGS. 1 to 3, the exchanger 14 comprises two parts 15, 15 ′ shown symmetrical with respect to the vertical plane AA of the boiler and which in fact constitute two elementary exchangers each connected to one of the side faces of the double wall 3 and preferably about two thirds of the combustion chamber 1 above the grate 2, so as to be in communication with the interior of the double wall 3. The median plane of each of the parts 15.15 'is approximately horizontal, and these two parts 15.15' are separated from each other so as to provide a free space between them 16 by which the combustion gases can flow upwards.

Du fait de cette construction, les deux parties 15,15' sont en porte-à-faux, car fixées seulement à une seule de leurs extrémités, si bien que les dilatations survenant ne sont à l'origine de pratiquement aucune contrainte dans ces parties 15,15', l'extrémité voisine du plan vertical médian étant tout à fait libre ou "flottante". Cette disposition présente par ailleurs un avantage supplémentaire important: les produits de combustion qui montent en léchant les faces latérales de la paroi double 3 sont déviés par l'échangeur vers l'espace libre 16 et leur parcours en contact avec l'enveloppe du fluide caloporteur est donc prolongé, ce qui améliore grandement le rendement de l'échange thermique.Due to this construction, the two parts 15, 15 ′ are cantilevered, since they are fixed only at one of their ends, so that the expansions which arise cause practically no stress in these parts. 15.15 ', the end near the median vertical plane being completely free or "floating". This arrangement also presents an important additional advantage: the combustion products which rise by licking the lateral faces of the double wall 3 are diverted by the exchanger towards the free space 16 and their course in contact with the envelope of the heat-transfer fluid. is therefore extended, which greatly improves the efficiency of the heat exchange.

De préférence chaque partie 15,15' de l'échangeur 14 ne forme pas une simple lame s'étendant dans la région supérieure de la chambre de combustion 1 mais deux lames adjacentes(superposées sur les dessins). A cet effet, les faces extérieures 17,18 de chaque partie 15,15' sont fixées à la face intérieure de la paroi double 3 et, entre elles, une plaque médiane 19 est fixée à la face extérieure de la paroi double 3 tout en ayant son autre extrémité (du côté du plan vertical médian A-A) libre. Ainsi sont formées dans chaque partie 15'15' de l'échangeur 14 deux lames de fluide distinctes, l'une circulant vers le plan médian A-A de la chaudière, et l'autre s'en éloignant, les deux lames étant en communication par la chicane 20 constituée par l'espace restant libre entre la plaque médiane 19 et l'extrémité libre de la partie correspondante 15,15'. De cette manière, le fluide caloporteur montant dans la paroi double 3 jusqu'au niveau de l'échangeur 14 passe dans la première lame de l'échangeur vers le centre, puis par la chicane 20, passe ensuite dans la seconde lame pour retrouver l'intérieur de la paroi double 3 et poursuivre son parcours dans la partie supérieure de celle-ci vers l'orifice de sortie 11. Cette augmentation de surface d'échange entre le fluide caloporteur et les produits de combustion, avec une circulation du fluide qui n'est pas seulement due à la convexion locale, donc sans circulation parasite spontanée, améliore considérablement le rendement.Preferably each part 15, 15 ′ of the exchanger 14 does not form a single blade extending in the upper region of the combustion chamber 1 but two adjacent blades (superimposed on the drawings). To this end, the external faces 17, 18 of each part 15, 15 ′ are fixed to the internal face of the double wall 3 and, between them, a middle plate 19 is fixed to the external face of the double wall 3 while having its other end (on the side of the vertical median plane AA) free. Thus are formed in each part 15'15 'of the exchanger 14 two separate fluid blades, one circulating towards the median plane AA of the boiler, and the other moving away from it, the two blades being in communication by the baffle 20 formed by the remaining free space between the middle plate 19 and the free end of the corresponding part 15, 15 ′. In this way, the heat transfer fluid rising in the double wall 3 to the level of the exchanger 14 passes through the first blade of the exchanger towards the center, then through the baffle 20, then passes te in the second strip to find the interior of the double wall 3 and continue its course in the upper part thereof towards the outlet orifice 11. This increase in the exchange surface between the heat transfer fluid and the products of combustion, with a circulation of the fluid which is not only due to the local convection, therefore without spontaneous parasitic circulation, considerably improves the efficiency.

Le transfert de chaleur par convexion entre les produits de la combustion et l'échangeur 14 peut d'autre part être amélioré de façon très significative en donnant à l'échangeur 14 à sa face inférieure 21 une pente ascendante d'arrière en avant et à sa face supérieure 22 une pente descendante dans le même sens. La figure 2 est particulièrement explicite pour illustrer l'effet ainsi obtenu.The transfer of heat by convection between the products of combustion and the exchanger 14 can on the other hand be improved very significantly by giving the exchanger 14 on its underside 21 an upward slope from back to front and to its upper face 22 slopes downward in the same direction. Figure 2 is particularly explicit to illustrate the effect thus obtained.

De la même manière, pour faciliter l'écoulement des produits de combustion vers l'échappement tout en augmentant les effets de la convexion, l'espace libre 16 entre les deux parties 15,15' sera avantageusement légèrement divergent d'arrière en avant, comme l'illustre bien la figure 3.Likewise, to facilitate the flow of combustion products to the exhaust while increasing the effects of convection, the free space 16 between the two parts 15, 15 ′ will advantageously be slightly divergent from back to front, as illustrated in Figure 3.

L'invention vient d'être exposée à la lumière d'un exemple d'exécution simple et avantageux, notamment du point de vue de sa construction et de la facilité d'accès aux surfaces d'échange pour les ramonages périodiques. Mais il apparaîtra immédiatement à l'homme du métier que sans sortir du cadre de la présente invention, on pourrait ne prévoir qu'une partie (15) à l'échangeur, ce qui est encore plus simple. De même, dans le cas de deux parties (15,15'), celles-ci, au lieu d'être symétriques peuvent être situées à des niveaux différents, l'une surplombant partiellement l'autre, ce qui permet de les allonger. En outre, il est également possible de prévoir un nombre de parties supérieur à deux sans autre difficulté particulière.The invention has just been exposed in the light of an example of simple and advantageous embodiment, in particular from the point of view of its construction and of the ease of access to the exchange surfaces for periodic sweeping. However, it will immediately appear to those skilled in the art that without departing from the scope of the present invention, only one part (15) could be provided for the exchanger, which is even simpler. Similarly, in the case of two parts (15,15 '), these, instead of being symmetrical, can be located at different levels, one partially overhanging the other, which makes it possible to lengthen them. In addition, it is also possible to provide for a number of parts greater than two without any other particular difficulty.

Par ailleurs, une amélioration supplémentaire du rendement peut être obtenue, si nécessaire, en disposant tant sur la surface interne que la surface externe des parois 17, 18 de chaque partie 15,15' des ailettes dans le sens transversal ou longitudinal par rapport à l'écoulement, respectivement du fluide caloporteur et des produits de combustion. Cette disposition facultative ne pose aucun problème à l'homme du métier, aussi n'a-t-elle pas été représentée pour ne pas nuire à la clarté des dessins.Furthermore, an additional improvement in efficiency can be obtained, if necessary, by placing both on the internal surface and the external surface of the walls 17, 18 of each part 15, 15 'of the fins in the transverse or longitudinal direction with respect to the flow, respectively of the heat transfer fluid and combustion products. This optional provision poses no problem to those skilled in the art, so it has not been shown so as not to affect the clarity of the drawings.

Les caractéristiques de l'échangeur 14 qui viennent d'être décrites permettent une augmentation considérable du rendement de la chaudière, et ce, non seulement en régime stable, mais aussi en phase transitoire de démarrage, car le profil extérieur de l'échangeur 14 permet d'éliminer les phénomènes de blocage en favorisant l'écoulement des produits de combustion avec une perte de charge minimale.The characteristics of the exchanger 14 which have just been described allow a considerable increase in the efficiency of the boiler, and this, not only in steady state, but also in transient start-up phase, because the external profile of the exchanger 14 allows eliminate blocking phenomena by promoting the flow of combustion products with minimal pressure drop.

Ce qui vient d'être dit en référence à une chaudière à combustible solide avec grille, reste valable pour une chaudière à combustible liquide ou gazeux avec brûleur. Dans ce cas un second échangeur du même type pourra être placé au fond de la chambre de combustion. Il jouera ainsi par ailleurs un rôle de tampon protecteur qui évitera la pose d'un revêtement réfractaire au fond de la chaudière, revêtement qui selon les techniques habituellement utilisées nécessite un entretien et remplacement fréquents.What has just been said with reference to a solid fuel boiler with grate, remains valid for a liquid or gaseous fuel boiler with burner. In this case a second exchanger of the same type could be placed at the bottom of the combustion chamber. It will thus also play a role of protective buffer which will prevent the installation of a refractory lining at the bottom of the boiler, a coating which according to the techniques usually used requires frequent maintenance and replacement.

Claims (7)

1. Echangeur pour chaudière à combustible dans laquelle le fluide à chauffer circule dans une paroi double(3) formant lame avec laquelle l'échangeur est en communication, caractérisé par le fait qu'il est constitué d'au moins une partie creuse (15,15') en forme de lame disposée au-dessus ou au fond de la chambre de combustion (1) en ménageant un espace libre (16) pour l'ascension des produits de combustion et raccordée du côté opposé à cet espace(16) à la face intérieure de la paroi double formant lame (3) de la chambre de combustion(l).1. Exchanger for a fuel boiler in which the fluid to be heated circulates in a double wall (3) forming a blade with which the exchanger is in communication, characterized in that it consists of at least one hollow part (15 , 15 ′) in the form of a blade arranged above or at the bottom of the combustion chamber (1) while providing a free space (16) for the ascent of the combustion products and connected on the opposite side to this space (16) to the inner face of the double blade wall (3) of the combustion chamber (l). 2. Echangeur selon la revendication 1, caractérisé par le fait que chaque partie (15,15') renferme une plaque médiane (19) fixée · à la face extérieure de la paroi double de la chambre de combustion(1) et ménageant un jeu entre elle même (19) et les parois (17,,18) de la partie correspondante (15,15') de manière à former deux lames parallèles communiquant par une chicane (20) du côté de l'espace libre (16).2. Exchanger according to claim 1, characterized in that each part (15,15 ') contains a middle plate (19) fixed · to the outer face of the double wall of the combustion chamber (1) and providing a clearance between itself (19) and the walls (17,, 18) of the corresponding part (15,15 ') so as to form two parallel blades communicating by a baffle (20) on the side of the free space (16). 3. Echangeur selon l'une quelconque des revendications 1 et 2, caractérisé par le fait que les faces externes de chaque partie (15,15') en forme de lame présentent une pente ascendante de l'arrière vers l'avant pour la face inférieure(21) et descendante de l'arrière vers l'avant pour la face supérieure(22).3. Exchanger according to any one of claims 1 and 2, characterized in that the external faces of each part (15,15 ') in the form of a blade have an ascending slope from the rear to the front for the face lower (21) and descending from rear to front for the upper face (22). 4. Echangeur selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que l'espace libre (16) est divergent de l'arrièré vers l'avant de la chambre de combustion(11)•4. Exchanger according to any one of claims 1 to 3, characterized in that the free space (16) is divergent from the rear towards the front of the combustion chamber (11) • 5. Echangeur selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que chaque partie (15,15') est pourvue d'ailettes internes baignées par le fluide caloporteur ou externes baignées par les produits de combustion.5. Exchanger according to any one of claims 1 to 4, characterized in that each part (15,15 ') is provided with internal fins bathed by the heat transfer fluid or external bathed by the combustion products. 6. Echangeur selon l'une quelconque des revendications 1 à 5, caractérisé par le fait qu'il est constitué de deux parties (15,15') symétriques ménageant entre elles l'espace libre (16).6. Exchanger according to any one of claims 1 to 5, characterized in that it consists of two parts (15,15 ') symmetrical leaving between them the free space (16). 7. Echangeur selon l'une quelconque des revendications 1 à 5, caractérisé par le fait qu'il est constitué de deux parties (15,15!) disposées de part et d'autre de la chambre de combustion(1), l'une surplombant partiellement l'autre et ménageant entre elles l'espace libre (16).7. Exchanger according to any one of claims 1 to 5, characterized in that it consists of two parts (15,15 ! ) Arranged on either side of the combustion chamber (1), the one partially overhanging the other and providing between them the free space (16).
EP80810256A 1979-08-21 1980-08-19 Floating heat exchanger for a combustion heater Withdrawn EP0024381A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH760579 1979-08-21
CH7605/79 1979-08-21

Publications (2)

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EP0024381A2 true EP0024381A2 (en) 1981-03-04
EP0024381A3 EP0024381A3 (en) 1981-05-06

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EP80810256A Withdrawn EP0024381A3 (en) 1979-08-21 1980-08-19 Floating heat exchanger for a combustion heater

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EP (1) EP0024381A3 (en)
ES (1) ES8105848A1 (en)
FR (1) FR2463899A1 (en)
PT (1) PT71711B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2741006A3 (en) * 2012-12-06 2017-06-14 Wagner Production s.r.o. Heating stove for warm air and/or heat exchanger for solid fuels

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2119606A (en) * 1937-08-23 1938-06-07 Earl C Stauffer Domestic heating boiler
US2128820A (en) * 1938-02-10 1938-08-30 Holtz Ireneus Basil Furnace
FR2279034A1 (en) * 1974-07-18 1976-02-13 Rapido Dinsing Werk Gmbh Oil fired sectional central heating boiler - stacked horizontal sections form alternate heater and heat exchange units

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2119606A (en) * 1937-08-23 1938-06-07 Earl C Stauffer Domestic heating boiler
US2128820A (en) * 1938-02-10 1938-08-30 Holtz Ireneus Basil Furnace
FR2279034A1 (en) * 1974-07-18 1976-02-13 Rapido Dinsing Werk Gmbh Oil fired sectional central heating boiler - stacked horizontal sections form alternate heater and heat exchange units

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2741006A3 (en) * 2012-12-06 2017-06-14 Wagner Production s.r.o. Heating stove for warm air and/or heat exchanger for solid fuels

Also Published As

Publication number Publication date
ES494418A0 (en) 1981-06-01
EP0024381A3 (en) 1981-05-06
ES8105848A1 (en) 1981-06-01
FR2463899A1 (en) 1981-02-27
PT71711A (en) 1980-09-01
PT71711B (en) 1981-06-25

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