EP0517578A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0517578A1
EP0517578A1 EP92401503A EP92401503A EP0517578A1 EP 0517578 A1 EP0517578 A1 EP 0517578A1 EP 92401503 A EP92401503 A EP 92401503A EP 92401503 A EP92401503 A EP 92401503A EP 0517578 A1 EP0517578 A1 EP 0517578A1
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EP
European Patent Office
Prior art keywords
heat exchanger
circuit
heating
water
exchanger according
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Withdrawn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
EP92401503A
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German (de)
French (fr)
Inventor
Jean-Claude Puzio
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Individual
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Individual
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Publication date
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Publication of EP0517578A1 publication Critical patent/EP0517578A1/en
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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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F24H1/526—Pipes in pipe heat exchangers for sanitary water
    • 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
    • F24H1/287—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 with the fire tubes arranged in line with the combustion chamber
    • 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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/14—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically both tubes being bent

Definitions

  • the present invention relates to an improved heat exchanger intended more particularly for reheating liquids, in particular water for heating premises and the like and for heating domestic water.
  • heat exchangers for heating water from hot gases originating from a combustion system, for example from burners with liquid or gaseous fuels.
  • these exchangers comprise a ferrule on which a tubular circuit is wound in which the water to be heated circulates, the hot gases coming from the combustion system passing through the ferrule, conventional systems being provided to facilitate the heat exchanges between the hot gases and the water to be heated.
  • the present invention proposes to make improvements to heat exchangers using the heat energy contained in hot gases.
  • the fin bundle is wound in a spiral and welded to the tubular circuit traversed by the hot gases and, preferably, the pipe wound in a spiral, traversed by the domestic water to be heated is welded to the spiral constituting the bundle of fins.
  • the enclosure in which the fluid to be heated circulates is constituted by an isolated storage tank.
  • the heat exchanger is applied to a heating installation, the circuit of which comprises a circulation pump with two directions of rotation and a system of non-return valves making it possible to isolate and condemn circulation of the heating water to the radiators, allowing only the heating of the domestic water.
  • Figure 1 is a schematic view in vertical axial section of a first embodiment of a heat exchanger according to the present invention.
  • Figure 2 is also a schematic view similar to Figure 1 illustrating a second embodiment of the heat exchanger according to the invention.
  • FIG. 3 is a sectional view along 3-3 of FIG. 2 illustrating a detail of the exchanger illustrated by this FIG. 2.
  • FIG. 4 is a view similar to FIG. 1 illustrating a mode of application of the heat exchanger object of the invention and,
  • FIG. 5 illustrates a variant of the heat exchanger according to the invention in a view similar to FIG. 1.
  • FIG. 1 represents a simplified embodiment of the heat exchanger which is the subject of the invention.
  • This exchanger comprises a tubular circuit which is constituted by a tube 10 having the shape of a U through which circulate hot gases whose calories are used for the heating of a fluid and in particular of water.
  • the hot gases come from a conventional combustion installation such as in particular a system of burners 12 for gaseous or liquid fuels, the fuel being brought to the burner by line 14.
  • the hot gases traversing the tube 10 in the direction of the arrow on the drawings are extracted by a fan 16 and discharged to the outside.
  • a condensate recovery tube is provided which is mounted at the base of the tube 10.
  • the tube 10 carrying the hot gases is immersed in a closed enclosure 18 in which the fluid to be heated circulates.
  • this enclosure 18 is insulated, it has the shape of a U so as to match the configuration of the tubular circuit 10 and it is provided with a settling pot 20 at its lower part to recover any impurities which may be present in the fluid to be heated .
  • This fluid to be heated for example the water of a central heating circuit, circulates against the current of the direction of circulation of the hot gases in the tube 10. This fluid is brought by the pipe 22 and is evacuated towards the radiators by line 24.
  • a bundle of fins 26 is provided, fixed by any suitable means, preferably by welding or brazing on the tube. 10. According to a preferred embodiment of the present invention, these fins are wound in spirals on the tube 10 so as to obtain the maximum exchange surface.
  • the heat exchanger according to the present invention makes it possible to obtain an excellent yield, the hot gases discharged after the heat exchange having a very low temperature.
  • the burner 12 is controlled by a solenoid valve making it possible to obtain an all-or-nothing operation, this solenoid valve being controlled by means of the extractor 16 so as to be actuated when the suction is sufficient to get the burner working.
  • the conventional temperature control systems provided by the invention act on the extractor 16 and simultaneously on an accelerator causing the fluid to be heated to circulate, for example the heating water in a central heating installation.
  • the exchanger according to the invention of the type described above can be used not only for heating by example of water from a heating system (in particular central heating) but also also, water intended for sanitary uses. Such an application is illustrated in FIG. 2.
  • a tubular circuit 28 is provided in which the sanitary water to be heated circulates, this tubular circuit being maintained in thermal contact with the tube 10 in which the hot gases circulate.
  • the tubular circuit 28 for sanitary water is a spiral circuit wound around the fins 26 of the tube 10 and welded or brazed on these fins and, according to a preferred embodiment, the spiral circuit 28 is welded directly to the external edge of the spiral circuit according to which the fin beam 26 is configured. Thanks to this arrangement, an optimal heat exchange is obtained between the fin beam and the domestic water circuit 28 while maintaining excellent exchange thermal between this bundle of fins and the fluid to be heated contained in the enclosure 18.
  • FIG. 4 represents an example of non-limiting application of the heat exchanger according to the present invention to a heating installation.
  • the water to be heated circulates in pipes 24 and 22 through a network of radiators such as 30.
  • the pipe circuit 22-24 is provided with a circulation pump 32 with two directions of rotation and it has two check valves return 34-36 making it possible to isolate the network of radiators 30 if desired. It is thus possible to obtain mixed operation by reversing the direction of circulation of the fluid by means of the pump 32 with two directions of rotation, the circuit towards the radiators 30 being interrupted by non-return valves 36 and 34, which makes it possible to obtain operation in domestic water heating only.
  • the extractor 16 can be be controlled by a water valve and the heating regulation can be short-circuited.
  • an auxiliary circulation circuit 38 has been provided for the heating water making it possible to absorb the overheating of the heating circuit for the domestic water in the absence of this domestic water being drawn.
  • this auxiliary circuit is maintained in close thermal contact with the tube 10 in which the hot gases circulate and also in thermal contact with the pipe in which the sanitary water circulates.
  • FIG. 5 is designated by the reference 40 the schematic representation of the spiral circuits of the fin bundle and of the pipe for sanitary water, these two systems being welded to each other so that 'saw above.
  • an auxiliary tube such as 38 can be provided, having a configuration also in a spiral, this auxiliary tube being welded on the fin-sanitary water pipe network itself wound in a spiral. An optimal heat exchange is thus obtained.
  • the heat exchanger according to the invention can be used in natural draft with a chimney or with a suction system. It can be adapted to a conventional storage tank by immersing the enclosure 18 of this exchanger in the volume of water contained in this storage tank.
  • the enclosure 18 is not insulated and it can be made of any material, a good thermal conductor, for example glass.
  • this enclosure 18 can be produced in the form of a conventional storage tank.
  • the spiral arrangement of the fin bundle, inside the tubular circuit traversed by the hot gases makes it possible to produce a baffled path for the latter, which increases the heat exchange surface with the gases. hot.
  • the thickness of the fin is cut in a spiral on the tubular circuit, part of the fin is inserted into the circuit traversed by the hot gases, the other part remaining immersed in the circuit of the fluid to be heated. . This improves the heat exchange between the hot gases and the fluid or fluids to be heated.
  • the present invention provides an improved heat exchanger making it possible to obtain very high yields when reheating fluids, in particular water for heating installations and water for sanitary use.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Heat exchanger of the type comprising a means of heating producing hot gases for the purpose of heating a fluid, in particular water, intended more specifically for heating rooms and/or sanitary water, characterised in that it comprises: - a tubular circuit (10) having the general shape of a U passed through by the hot gases and positioned in an enclosure (18) in which the fluid to be heated circulates; - a bank of fins (26) fixed on said tubular circuit (10) in order to improve the heat exchanges between the hot gases circulating in said tubular circuit and the fluid circulating in said enclosure, and - a pipe (28), in which the sanitary water to be heated circulates and which is coiled in a spiral inside said enclosure and kept in heat-exchange contact with said bank of fins. <IMAGE>

Description

La présente invention a pour objet un échangeur thermique perfectionné destiné plus particulièrement au réchauffage de liquides, notamment de l'eau pour le chauffage de locaux et similaires et pour le chauffage d'eau sanitaire.The present invention relates to an improved heat exchanger intended more particularly for reheating liquids, in particular water for heating premises and the like and for heating domestic water.

On connaît de nombreuses réalisations d'échangeurs thermiques pour le chauffage de l'eau à partir de gaz chauds provenant d'un système de combustion , par exemple de brûleurs à combusibles liquides ou gazeux. Généralement ces échangeurs comportent une virole sur laquelle s'enroule un circuit tubulaire dans lequel circule l'eau à réchauffer, les gaz chauds issus du système de combustion traversant la virole, des systèmes classiques étant prévus pour faciliter les échanges thermiques entre les gaz chauds et l'eau à réchauffer.Numerous embodiments of heat exchangers are known for heating water from hot gases originating from a combustion system, for example from burners with liquid or gaseous fuels. Generally, these exchangers comprise a ferrule on which a tubular circuit is wound in which the water to be heated circulates, the hot gases coming from the combustion system passing through the ferrule, conventional systems being provided to facilitate the heat exchanges between the hot gases and the water to be heated.

La présente invention se propose d'apporter des perfectionnements aux échangeurs thermiques utilisant l'énergie calorifique contenue dans des gaz chauds.The present invention proposes to make improvements to heat exchangers using the heat energy contained in hot gases.

Cette invention a donc pour objet un échangeur thermique du type comportant un moyen de chauffage produisant des gaz chauds en vue de chauffer un fluide notamment de l'eau destinée plus particulièrement au chauffage de locaux et/ou d'eau sanitaire caractérisé en ce qu'il comporte :

  • un circuit tubulaire ayant la forme générale d'un U parcouru par les gaz chauds et positionné dans une enceinte dans laquelle circule le fluide à réchauffer ;
  • un faisceau d'ailettes soudé sur ledit circuit tubulaire afin d'améliorer les échanges thermiques entre les gaz chauds circulant dans ledit circuit tubulaire et le fluide circulant dans ladite enceinte et,
  • une canalisation, dans laquelle circule de l'eau sanitaire à réchauffer, enroulée en spirale à l'intérieur de ladite enceinte et maintenue en contact d'échanges thermiques avec ledit faisceau d'ailettes.
The subject of this invention is therefore a heat exchanger of the type comprising a heating means producing hot gases with a view to heating a fluid, in particular water intended more particularly for heating premises and / or sanitary water, characterized in that it comprises :
  • a tubular circuit having the general shape of a U traversed by the hot gases and positioned in an enclosure in which the fluid to be heated circulates;
  • a bundle of fins welded to said tubular circuit in order to improve the heat exchanges between the hot gases circulating in said tubular circuit and the fluid circulating in said enclosure and,
  • a pipe, in which circulates sanitary water to be heated, wound in a spiral inside said enclosure and kept in contact with heat exchanges with said bundle of fins.

Selon une caractéristique de la présente invention le faisceau d'ailettes est enroulé en spirale et soudé sur le circuit tubulaire parcouru par les gaz chauds et, de préférence la canalisation enroulée en spirale, parcourue par l'eau sanitaire à réchauffer est soudée sur la spirale constituant le faisceau d'ailettes.According to a characteristic of the present invention, the fin bundle is wound in a spiral and welded to the tubular circuit traversed by the hot gases and, preferably, the pipe wound in a spiral, traversed by the domestic water to be heated is welded to the spiral constituting the bundle of fins.

Selon l'invention, l'enceinte dans laquelle circule le fluide à réchauffer est constituée par un ballon d'accumulation isolé.According to the invention, the enclosure in which the fluid to be heated circulates is constituted by an isolated storage tank.

Selon un exemple de réalisation préféré de la présente invention , l'échangeur thermique est appliqué à une installation de chauffage dont le circuit comporte une pompe de circulation à double sens de rotation et un système de clapets anti-retour permettant d'isoler et de condamner la circulation de l'eau de chauffage vers les radiateurs en ne permettant que le chauffage de l'eau sanitaire.According to a preferred embodiment of the present invention, the heat exchanger is applied to a heating installation, the circuit of which comprises a circulation pump with two directions of rotation and a system of non-return valves making it possible to isolate and condemn circulation of the heating water to the radiators, allowing only the heating of the domestic water.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent divers exemples de réalisation dépourvus de tout caractère limitatif. Sur les dessins :Other characteristics and advantages of the present invention will emerge from the description given below with reference to the accompanying drawings which illustrate various embodiments thereof which are not limiting in any way. In the drawings:

La figure 1 est une vue schématique en coupe axiale verticale d'un premier exemple de réalisation d'un échangeur thermique selon la présente invention.Figure 1 is a schematic view in vertical axial section of a first embodiment of a heat exchanger according to the present invention.

La figure 2 est également une vue schématique similaire à la figure 1 illustrant un second exemple de réalisation de l'échangeur thermique selon l'invention.Figure 2 is also a schematic view similar to Figure 1 illustrating a second embodiment of the heat exchanger according to the invention.

La figure 3 est une vue en coupe selon 3-3 de la figure 2 illustrant un détail de l'échangeur illustré par cette figure 2.FIG. 3 is a sectional view along 3-3 of FIG. 2 illustrating a detail of the exchanger illustrated by this FIG. 2.

La figure 4 est une vue similaire à la figure 1 illustrant un mode d'application de l'échangeur thermique objet de l'invention et,FIG. 4 is a view similar to FIG. 1 illustrating a mode of application of the heat exchanger object of the invention and,

La figure 5 illustre une variante de l'échangeur thermique selon l'invention en une vue similaire à la figure 1.FIG. 5 illustrates a variant of the heat exchanger according to the invention in a view similar to FIG. 1.

On se réfère en premier lieu à la figure 1 qui représente un exemple de réalisation simplifié de l'échangeur thermique objet de l'invention.Reference is firstly made to FIG. 1 which represents a simplified embodiment of the heat exchanger which is the subject of the invention.

Cet échangeur comprend un circuit tubulaire qui est constitué par un tube 10 ayant la forme d'un U au travers duquel circulent des gaz chauds dont les calories sont utilisées pour le réchauffage d'un fluide et notamment de l'eau. Dans l'exemple de réalisation illustré par la figure 1 les gaz chauds proviennent d'une installation de combustion classique telle que notamment un système de brûleurs 12 à combustibles gazeux ou liquides, le combustible étant amené au brûleur par la conduite 14. Les gaz chauds parcourant le tube 10 selon le sens de la flèche portée sur les dessins sont extraits par un ventilateur 16 et évacués vers l'extérieur. Selon l'invention, on prévoit un tube de récupération des condensats qui est monté à la base du tube 10.This exchanger comprises a tubular circuit which is constituted by a tube 10 having the shape of a U through which circulate hot gases whose calories are used for the heating of a fluid and in particular of water. In the embodiment illustrated in FIG. 1, the hot gases come from a conventional combustion installation such as in particular a system of burners 12 for gaseous or liquid fuels, the fuel being brought to the burner by line 14. The hot gases traversing the tube 10 in the direction of the arrow on the drawings are extracted by a fan 16 and discharged to the outside. According to the invention, a condensate recovery tube is provided which is mounted at the base of the tube 10.

Le tube 10 véhiculant les gaz chauds est immergé dans une enceinte close 18 dans laquelle circule le fluide à réchauffer. Dans cet exemple de réalisation, cette enceinte 18 est isolée, elle présente la forme d'un U de manière à épouser la configuration du circuit tubulaire 10 et elle est pourvue d'un pot de décantation 20 à sa partie inférieure pour récupérer les impuretés éventuelles pouvant être présentes dans le fluide à réchauffer. Ce fluide à réchauffer, par exemple l'eau d'un circuit de chauffage central, circule à contre-courant du sens de circulation des gaz chauds dans le tube 10. Ce fluide est amené par la canalisation 22 et est évacué vers les radiateurs par la canalisation 24.The tube 10 carrying the hot gases is immersed in a closed enclosure 18 in which the fluid to be heated circulates. In this exemplary embodiment, this enclosure 18 is insulated, it has the shape of a U so as to match the configuration of the tubular circuit 10 and it is provided with a settling pot 20 at its lower part to recover any impurities which may be present in the fluid to be heated . This fluid to be heated, for example the water of a central heating circuit, circulates against the current of the direction of circulation of the hot gases in the tube 10. This fluid is brought by the pipe 22 and is evacuated towards the radiators by line 24.

Afin d'améliorer les échanges thermiques entre les gaz chauds circulant dans le tube 10 et le fluide à réchauffer circulant dans l'enceinte 18 on prévoit un faisceau d'ailettes 26 fixé par tout moyen approprié, de préférence par soudage ou brasage sur le tube 10. Selon un mode de réalisation préféré de la présente invention, ces ailettes sont enroulées en spirales sur le tube 10 de façon à obtenir la surface d'échange maximal. Ainsi, l'échangeur thermique selon la présente invention permet d'obtenir un excellent rendement, les gaz chauds évacués après l'échange thermique présentant une température très basse.In order to improve the heat exchanges between the hot gases circulating in the tube 10 and the fluid to be heated circulating in the enclosure 18, a bundle of fins 26 is provided, fixed by any suitable means, preferably by welding or brazing on the tube. 10. According to a preferred embodiment of the present invention, these fins are wound in spirals on the tube 10 so as to obtain the maximum exchange surface. Thus, the heat exchanger according to the present invention makes it possible to obtain an excellent yield, the hot gases discharged after the heat exchange having a very low temperature.

De préférence, le brûleur 12 est commandé par une électro-vanne permettant d'obtenir un fonctionnement par tout ou rien, cette électro-vanne étant pilotée par l'intermédiaire de l'extracteur 16 de manière à être actionnée lorsque l'aspiration est suffisante pour obtenir le fonctionnement du brûleur. Les systèmes de régulation de température classiques prévus par l'invention agissent sur l'extracteur 16 et simultanément sur un accélérateur faisant circuler le fluide à réchauffer, par exemple l'eau de chauffage dans une installation de chauffage central.Preferably, the burner 12 is controlled by a solenoid valve making it possible to obtain an all-or-nothing operation, this solenoid valve being controlled by means of the extractor 16 so as to be actuated when the suction is sufficient to get the burner working. The conventional temperature control systems provided by the invention act on the extractor 16 and simultaneously on an accelerator causing the fluid to be heated to circulate, for example the heating water in a central heating installation.

L'échangeur selon l'invention du type décrit ci-dessus peut être utilisé non seulement pour assurer le chauffage par exemple de l'eau d'un système de chauffage (notamment chauffage central) mais également en outre, de l'eau destinée à des usages sanitaires. Une telle application est illustrée par la figure 2.The exchanger according to the invention of the type described above can be used not only for heating by example of water from a heating system (in particular central heating) but also also, water intended for sanitary uses. Such an application is illustrated in FIG. 2.

Dans l'exemple de réalisation d'une telle application, on prévoit un circuit tubulaire 28 dans lequel circule l'eau sanitaire à réchauffer, ce circuit tubulaire étant maintenu en contact thermique avec le tube 10 dans lequel circulent les gaz chauds. De préférence, le circuit tubulaire 28 pour l'eau sanitaire est un circuit en spirale enroulé autour des ailettes 26 du tube 10 et soudé ou brasé sur ces ailettes et, selon un exemple de réalisation préféré, le circuit en spirale 28 est soudé directement sur l'arête externe du circuit en spirale selon lequel est configuré le faisceau d'ailettes 26. Grâce à cette disposition, on obtient un échange thermique optimal entre le faisceau d'ailettes et le circuit d'eau sanitaire 28 tout en maintenant un excellent échange thermique entre ce faisceau d'ailettes et le fluide à réchauffer contenu dans l'enceinte 18.In the embodiment of such an application, a tubular circuit 28 is provided in which the sanitary water to be heated circulates, this tubular circuit being maintained in thermal contact with the tube 10 in which the hot gases circulate. Preferably, the tubular circuit 28 for sanitary water is a spiral circuit wound around the fins 26 of the tube 10 and welded or brazed on these fins and, according to a preferred embodiment, the spiral circuit 28 is welded directly to the external edge of the spiral circuit according to which the fin beam 26 is configured. Thanks to this arrangement, an optimal heat exchange is obtained between the fin beam and the domestic water circuit 28 while maintaining excellent exchange thermal between this bundle of fins and the fluid to be heated contained in the enclosure 18.

La figure 4 représente un exemple d'application non limitatif de l'échangeur thermique selon la présente invention à une installation de chauffage. L'eau à réchauffer circule dans les canalisations 24 et 22 en traversant un réseau de radiateurs tels que 30. Le circuit de canalisation 22-24 est pourvu d'une pompe de circulation 32 à double sens de rotation et il comporte deux clapets anti-retour 34-36 permettant d'isoler si on le désire le réseau de radiateurs 30. On peut ainsi obtenir un fonctionnement mixte en inversant le sens de circulation du fluide grâce à la pompe 32 à double sens de rotation, le circuit vers les radiateurs 30 étant interrompu grâce aux clapets anti-retour 36 et 34, ce qui permet d'obtenir un fonctionnement en chauffage eau sanitaire uniquement. Dans ce cas, l'extracteur 16 peut être être commandé par une valve eau et la régulation chauffage peut être court-circuitée.FIG. 4 represents an example of non-limiting application of the heat exchanger according to the present invention to a heating installation. The water to be heated circulates in pipes 24 and 22 through a network of radiators such as 30. The pipe circuit 22-24 is provided with a circulation pump 32 with two directions of rotation and it has two check valves return 34-36 making it possible to isolate the network of radiators 30 if desired. It is thus possible to obtain mixed operation by reversing the direction of circulation of the fluid by means of the pump 32 with two directions of rotation, the circuit towards the radiators 30 being interrupted by non-return valves 36 and 34, which makes it possible to obtain operation in domestic water heating only. In this case, the extractor 16 can be be controlled by a water valve and the heating regulation can be short-circuited.

Dans la variante illustrée par la figure 5, on a prévu un circuit auxiliaire 38 de circulation pour l'eau de chauffage permettant d'absorber la surchauffe du circuit de chauffage de l'eau sanitaire en l'absence de tirage de cette eau sanitaire.In the variant illustrated in FIG. 5, an auxiliary circulation circuit 38 has been provided for the heating water making it possible to absorb the overheating of the heating circuit for the domestic water in the absence of this domestic water being drawn.

Dans l'exemple de réalisation illustré par la figure 5, ce circuit auxiliaire est maintenu en contact thermique étroit avec le tube 10 dans lequel circulent les gaz chauds et également en contact thermique avec la canalisation dans laquelle circule l'eau sanitaire. Sur cette figure 5 on a désigné par la référence 40 la représentation schématique des circuits en spirale du faisceau d'ailettes et de la canalisation pour l'eau sanitaire, ces deux systèmes étant soudés l'un sur l'autre ainsi qu'on l'a vu ci-dessus. On peut bien entendu envisager toute autre disposition par exemple on peut prévoir un tube auxiliaire tel que 38 ayant une configuration également en spirale, ce tube auxiliaire étant soudé sur le réseau ailettes-canalisation d'eau sanitaire lui même enroulé en spirale. On obtient ainsi un échange thermique optimal.In the embodiment illustrated by FIG. 5, this auxiliary circuit is maintained in close thermal contact with the tube 10 in which the hot gases circulate and also in thermal contact with the pipe in which the sanitary water circulates. In this FIG. 5 is designated by the reference 40 the schematic representation of the spiral circuits of the fin bundle and of the pipe for sanitary water, these two systems being welded to each other so that 'saw above. It is of course possible to envisage any other arrangement, for example an auxiliary tube such as 38 can be provided, having a configuration also in a spiral, this auxiliary tube being welded on the fin-sanitary water pipe network itself wound in a spiral. An optimal heat exchange is thus obtained.

L'échangeur thermique selon l'invention peut être utilisé en tirage naturel avec une cheminée ou avec un système à ventouse. Il peut être adapté sur un ballon d'accumulation classique en plongeant l'enceinte 18 de cet échangeur dans le volume d'eau contenu dans ce ballon d'accumulation. Dans ce cas, l'enceinte 18 n'est pas isolée et elle peut être réalisée en tout matériau, bon conducteur thermique par exemple en verre. De même, cette enceinte 18 peut être réalisée sous la forme d'un ballon d'accumulation classique.The heat exchanger according to the invention can be used in natural draft with a chimney or with a suction system. It can be adapted to a conventional storage tank by immersing the enclosure 18 of this exchanger in the volume of water contained in this storage tank. In this case, the enclosure 18 is not insulated and it can be made of any material, a good thermal conductor, for example glass. Likewise, this enclosure 18 can be produced in the form of a conventional storage tank.

Selon l'invention, la disposition en spirale du faisceau d'ailettes, à l'intérieur du circuit tubulaire parcouru par les gaz chauds permet de réaliser un parcours en chicane pour ces derniers, ce qui augmente la surface d'échange thermique avec les gaz chauds. A cet effet, on découpe en spirale l'épaisseur de l'ailette sur le circuit tubulaire, on insère une partie de l'ailette dans le circuit parcouru par les gaz chauds, l'autre partie restant immergée dans le circuit du fluide à réchauffer. On améliore ainsi les échanges thermiques entre les gaz chauds et le ou les fluides à réchauffer.According to the invention, the spiral arrangement of the fin bundle, inside the tubular circuit traversed by the hot gases makes it possible to produce a baffled path for the latter, which increases the heat exchange surface with the gases. hot. To this end, the thickness of the fin is cut in a spiral on the tubular circuit, part of the fin is inserted into the circuit traversed by the hot gases, the other part remaining immersed in the circuit of the fluid to be heated. . This improves the heat exchange between the hot gases and the fluid or fluids to be heated.

Il ressort clairement de la description qui précède que la présente invention apporte un échangeur thermique perfectionné permettant d'obtenir des rendements très élevés lors du réchauffage de fluides notamment de l'eau pour installation de chauffage et de l'eau à usage sanitaire.It is clear from the above description that the present invention provides an improved heat exchanger making it possible to obtain very high yields when reheating fluids, in particular water for heating installations and water for sanitary use.

Il demeure bien entendu que la présente invention n'est pas limitée aux divers exemples de réalisation décrit et/ou représenté ici mais qu'elle en englobe toutes les variantes.It remains to be understood that the present invention is not limited to the various exemplary embodiments described and / or shown here but that it encompasses all variants thereof.

Claims (10)

Echangeur thermique du type comportant un moyen de chauffage produisant des gaz chauds en vue de chauffer un fluide notamment de l'eau destinée plus particulièrement au chauffage de locaux et/ou d'eau sanitaire caractérisé en ce qu'il comporte : - un circuit tubulaire (10) ayant la forme générale d'un U parcouru par les gaz chauds et positionné dans une enceinte (18) dans laquelle circule le fluide à réchauffer ; - un faisceau d'ailettes (26) fixé sur ledit circuit tubulaire (10) afin d'améliorer les échanges thermiques entre les gaz chauds circulant dans ledit circuit tubulaire et le fluide circulant dans ladite enceinte et, - une canalisation (28), dans laquelle circule de l'eau sanitaire à réchauffer, enroulée en spirale à l'intérieur de ladite enceinte et maintenue en contact d'échanges thermiques avec ledit faisceau d'ailettes. Heat exchanger of the type comprising a heating means producing hot gases with a view to heating a fluid, in particular water intended more particularly for heating premises and / or sanitary water, characterized in that it comprises: - A tubular circuit (10) having the general shape of a U traversed by the hot gases and positioned in an enclosure (18) in which the fluid to be heated circulates; a bundle of fins (26) fixed on said tubular circuit (10) in order to improve the heat exchanges between the hot gases circulating in said tubular circuit and the fluid circulating in said enclosure and, - A pipe (28), in which circulates sanitary water to be heated, wound in a spiral inside said enclosure and maintained in contact with heat exchanges with said bundle of fins. Echangeur thermique selon la revendication 1 caractérisé en ce que le faisceau d'ailettes (26) est enroulé en spirale et soudé sur le circuit tubulaire (10) parcouru par les gaz chauds.Heat exchanger according to claim 1 characterized in that the fin bundle (26) is wound in a spiral and welded on the tubular circuit (10) traversed by the hot gases. Echangeur thermique selon la revendication 2 caractérisé en ce que la canalisation (28) enroulée en spirale, parcourue par l'eau sanitaire à réchauffer est soudée sur la spirale constituant le faisceau d'ailettes (26).Heat exchanger according to claim 2 characterized in that the pipe (28) wound in a spiral, traversed by the sanitary water to be heated is welded to the spiral constituting the bundle of fins (26). Echangeur thermique selon l'une quelconque des revendications précédentes caractérisé en ce que ladite enceinte (18) est en forme de U et elle comporte un pot de décantation (20) prévu à sa partie inférieure.Heat exchanger according to any one of the preceding claims, characterized in that the said enclosure (18) is U-shaped and it comprises a decanting pot (20) provided at its lower part. Echangeur thermique selon l'une quelconque des revendications précédentes caractérisé en ce que l'on prévoit un tube de récupération des condensats à la partie inférieure du circuit tubulaire (10) parcouru par les gaz chauds.Heat exchanger according to any one of the preceding claims, characterized in that a condensate recovery tube is provided at the lower part of the tubular circuit (10) through which the hot gases pass. Echangeur thermique selon l'une quelconque des revendications précédentes caractérisé en ce que l'on prévoit un circuit auxiliaire (38) de circulation pour l'eau de chauffage en contact thermique étroit avec le circuit tubulaire (10) dans lequel circule l'eau sanitaire.Heat exchanger according to any one of the preceding claims, characterized in that an auxiliary circulation circuit (38) is provided for the heating water in close thermal contact with the tubular circuit (10) in which the domestic water circulates . Echangeur thermique selon la revendication 6 caractérisé en ce que ledit circuit auxiliaire (38) présente une configuration en spirale et il est soudé sur le réseau (40) ailettes-canalisation d'eau sanitaire lui même enroulé en spirale.Heat exchanger according to claim 6 characterized in that said auxiliary circuit (38) has a spiral configuration and it is welded to the network (40) fins-pipe of sanitary water itself wound in a spiral. Echangeur thermique selon l'une quelconque des revendications précédentes caractérisé en ce qu'il est adapté sur un ballon d'accumulation classique en plongeant l'enceinte (18) dans ledit ballon.Heat exchanger according to any one of the preceding claims, characterized in that it is adapted to a conventional storage tank by immersing the enclosure (18) in said tank. Echangeur thermique selon l'une quelconque des revendications précédentes caractérisé en ce qu'il est appliqué à une installation de chauffage dont le circuit comporte une pompe de circulation (32) à double sens de rotation et un système de clapets anti-retour (34-36) permettant d'isoler et de condamner la circulation de l'eau de chauffage vers les radiateurs en ne permettant que le chauffage de l'eau sanitaire.Heat exchanger according to any one of the preceding claims, characterized in that it is applied to a heating installation the circuit of which comprises a circulation pump (32) with two directions of rotation and a system of non-return valves (34- 36) to isolate and condemn the circulation of the heating water to the radiators, allowing only the heating of the domestic water. Echangeur thermique selon l'une quelconque des revendications précédentes caractérisé en ce que l'on réalise une découpe en spirale de l'épaisseur de l'ailette sur le circuit tubulaire, une partie de l'ailette étant insérée dans le circuit parcouru par les gaz chauds et l'autre partie restant immergée dans le circuit du fluide à réchauffer.Heat exchanger according to any one of the preceding claims, characterized in that a spiral cut is made of the thickness of the fin on the tubular circuit, part of the fin being inserted in the circuit traversed by the gases. hot and the other part remaining immersed in the circuit of the fluid to be heated.
EP92401503A 1991-06-03 1992-06-02 Heat exchanger Withdrawn EP0517578A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9106655A FR2677113B1 (en) 1991-06-03 1991-06-03 TUBULAR HEAT EXCHANGER WITH FINS FOR HEATING A LIQUID FLUID BY HOT GASES.
FR9106655 1991-06-03

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EP0517578A1 true EP0517578A1 (en) 1992-12-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451527C (en) * 2007-06-19 2009-01-14 张伟 Double-drwn counter-current heat exchanger
WO2010072530A2 (en) * 2008-12-23 2010-07-01 G+R Technology Group Ag Tubular heat exchanger for a device for producing polysilicon
EP2787314A4 (en) * 2011-11-30 2015-08-05 Daikin Ind Ltd Double-pipe heat exchanger and air conditioner using same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2208503A5 (en) * 1972-11-28 1974-06-21 Carlier Marcel
EP0008568A1 (en) * 1978-08-24 1980-03-05 Lennart Bernstein A boiler for heating the heat-transfer medium in a heating system
DE3824367A1 (en) * 1988-07-19 1990-01-25 Ernst Roehner Combination heating boiler
DE3838507A1 (en) * 1988-11-12 1990-05-17 Ernst Roehner Combined heating boiler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2208503A5 (en) * 1972-11-28 1974-06-21 Carlier Marcel
EP0008568A1 (en) * 1978-08-24 1980-03-05 Lennart Bernstein A boiler for heating the heat-transfer medium in a heating system
DE3824367A1 (en) * 1988-07-19 1990-01-25 Ernst Roehner Combination heating boiler
DE3838507A1 (en) * 1988-11-12 1990-05-17 Ernst Roehner Combined heating boiler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451527C (en) * 2007-06-19 2009-01-14 张伟 Double-drwn counter-current heat exchanger
WO2010072530A2 (en) * 2008-12-23 2010-07-01 G+R Technology Group Ag Tubular heat exchanger for a device for producing polysilicon
WO2010072530A3 (en) * 2008-12-23 2011-02-17 G+R Technology Group Ag Tubular heat exchanger for a device for producing polysilicon
EP2787314A4 (en) * 2011-11-30 2015-08-05 Daikin Ind Ltd Double-pipe heat exchanger and air conditioner using same

Also Published As

Publication number Publication date
FR2677113B1 (en) 1993-11-26
FR2677113A1 (en) 1992-12-04

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