EP0680585B1 - Electric boiler for heat transfer liquid circulating in an open or closed system - Google Patents

Electric boiler for heat transfer liquid circulating in an open or closed system Download PDF

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Publication number
EP0680585B1
EP0680585B1 EP95902177A EP95902177A EP0680585B1 EP 0680585 B1 EP0680585 B1 EP 0680585B1 EP 95902177 A EP95902177 A EP 95902177A EP 95902177 A EP95902177 A EP 95902177A EP 0680585 B1 EP0680585 B1 EP 0680585B1
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Prior art keywords
plates
block
faces
heater block
corrugations
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EP95902177A
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German (de)
French (fr)
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EP0680585A1 (en
Inventor
Claude Roussel
Fabrice Chopard
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Vicarb SA
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Vicarb SA
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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
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/121—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using electric energy supply

Definitions

  • the present invention relates to a new type of boiler allowing a liquid to be brought to a predetermined temperature coolant.
  • It relates more particularly to a new type of boiler electric to ensure the production of hot water, for example when you want to produce domestic hot water (circulation of water in an open circuit), either for heating installations of water circulating in closed circuit (industrial heating, heating domestic ).
  • the general structure uses heating means of the type of those described in WO-A-93 20389 for the production of heat exchangers heat used in many industrial sectors (industry chemical, pharmaceutical, etc.), which allow regulation to be carried out thermal of a fluid.
  • such exchangers are in the form of a set comprising plates having corrugations on their two faces, for example in the form of rafters, clamped together between two bottoms by means of tie rods and which have in their corners openings which delimit in stacking of entry and exit passages allowing circulation fluids and which flow against the surface of said plates in the space between them.
  • a heating plate in the form of a homogeneous block with the interior of which is embedded a heating resistor, a block whose external dimensions and the structure of the external faces correspond to those of the elementary plates and which also includes in its angles orifices corresponding to those of said plates, can be inserted between two plates.
  • the block heater will be in the form of a parallelepiped assembly having a significantly greater thickness than the plates elements to incorporate a heating resistance in its middle part.
  • the heating block may have only one resistance, but its structure also allows to consider incorporating into the latter three electrical resistors connected to a three-phase source.
  • such a heating block will have a thickness of fifteen to twenty millimeters, while the stamped elementary plates arranged on either side of said block have, in turn, a space in thickness of the order of three millimeters (distance between the corrugations on each side).
  • the heating block is made of all conductive materials of the heat, especially in materials such as metals (aluminum for example), graphite, plastics, materials composites.
  • Such a block is preferably obtained by molding, a resistance electric shielded being incorporated during this operation.
  • the ribs or undulations, in the form of chevrons, as well as the peripheral groove on one of the faces for positioning of a joint, elements which correspond to those of an elementary plate stamped from a plate heat exchanger, are also produced during this molding operation, although it could be envisaged to carry out later by machining.
  • the two outer surfaces of said heating block can possibly receive a surface treatment depending on the nature of the liquid circulating against these walls.
  • a surface treatment may be coated with polytetrafluoroethylene, chromium, nickel among others.
  • the boiler conforms to the invention which allows to bring to a predetermined temperature a heat transfer liquid (FC) circulating in a circuit which can be open or closed, has the following structure.
  • FC heat transfer liquid
  • this boiler essentially consists of two stamped plates (P) having on their two faces, undulations, for example in shape of chevrons oriented in the same direction.
  • These plates (P) have in their corners openings which delimit entry and exit passages when stacked allowing the circulation of a fluid, circulation obtained by through a peripheral seal (J) associated with one of the faces of each plate (P).
  • a heating block (I) which is in the form of a homogeneous block with inside which an electrical resistance (R) is embedded, and this in its middle part (see Figures 2a, 2b and 3).
  • This resistance is of the armored type and its incorporation is carried out during the molding of the block (I), block which can be based on all conductive materials such as metal (aluminum), graphite, plastic ...
  • this block (I) as well as the structure of these external faces (A, B), correspond to those of the elementary plates stamped (P), except that the chevron-shaped undulations present on its external faces (A, B), are oriented in opposite directions, this which has the advantage, as will be seen in the following of the description, to be able to juxtapose several blocks heating when you want to increase the power while having electrical connections arranged on the same side of the plates.
  • the liquid (FC) therefore flows against the surface of the heating block (I) in the channels formed by the cooperation of the undulations that present the faces of said block (I) with those which the surfaces comprise opposite the stamped plates (P).
  • an electric boiler according to the invention using two elementary stamped plates (P) conventional for the production of heat exchangers having a dimension of 350 x 102 and a thickness taken between the vertices of the undulations of said plate of the order of three millimeters, in interposing between two elementary plates (P) a heating block (I) having a thickness of fifteen millimeters inside which is embedded a heating resistor of the armored type, having a diameter about 6.5 mm and a power of 3000 watts / 220 volts.
  • the resistance (R) has a configuration as it extends in the middle part of the block heating, and this inside the surface defined by the peripheral joint (I).
  • such a design also makes it possible to adapt easily the power of the boiler according to the needs.
  • the power being directly proportional to the number of heating blocks, it is possible to increase it by juxtaposing a number determined of modules, as illustrated in figure 2 (two plates stamped, a heating block), the circulation of heat transfer fluid always performed between the heating blocks and the stamped plates.
  • FIG. 4 and 5 Another possibility to increase the power of the boiler may consist, as shown in Figures 4 and 5, of juxtaposing several hot plates, the total power also being proportional to the number of heating blocks (I).
  • the two stamped elementary plates (P) two in number enclose between them two juxtaposed heating blocks (I). It is obvious that we could make a boiler with a larger number of heating blocks (I) juxtaposed.
  • all heat transfer fluid channels are in parallel (single pass circulation). Such an arrangement is particularly suitable when the flow of the heat transfer fluid is important for a small temperature difference.
  • Figure 5 illustrates the same type of boiler adapted to a flow of weak fluid but with a significant temperature difference, the circulation fluid is then produced in series (multi-pass circulation). For this do, it is enough to alternately close the openings (3) and (6) of the successive plates.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Central Heating Systems (AREA)
  • Table Equipment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

PCT No. PCT/FR94/01377 Sec. 371 Date Jul. 17, 1995 Sec. 102(e) Date Jul. 17, 1995 PCT Filed Nov. 25, 1994 PCT Pub. No. WO95/14893 PCT Pub. Date Jun. 1, 1995Electric boiler for heat-transfer liquid (FC) comprising a set of plates (P) having corrugations on both their faces, and which include, in their corners, openings (3, 4, 5, 6) allowing circulation of fluid. Said assembly consists of at least one module comprising two stamped plates (P), the corrugations of which are in the same sense on both their faces between which at least one heater block (I) is inserted, within which heater block a resistance element (R) is embedded, being in the form of a block which also includes orifices (3, 4, 5, 6) as well as herringbone corrugations on both its faces (A) and (B).

Description

La présente invention a trait à un nouveau type de chaudière permettant de porter à une température prédéterminée un liquide caloporteur.The present invention relates to a new type of boiler allowing a liquid to be brought to a predetermined temperature coolant.

Elle a trait plus particulièrement à un nouveau type de chaudière électrique permettant d'assurer la production d'eau chaude, par exemple lorsque l'on souhaite produire de l'eau chaude sanitaire (circulation de l'eau dans un circuit ouvert), soit pour des installations de chauffage d'eau circulant en circuit fermé (chauffage industriel, chauffage domestique ...).It relates more particularly to a new type of boiler electric to ensure the production of hot water, for example when you want to produce domestic hot water (circulation of water in an open circuit), either for heating installations of water circulating in closed circuit (industrial heating, heating domestic ...).

Plus précisément, elle concerne un nouveau type de chaudière dont la structure générale met en oeuvre des moyens de chauffage du type de ceux décrits dans le WO-A-93 20389 pour la réalisation d'échangeurs de chaleur utilisés dans de nombreux secteurs industriels (industrie chimique, pharmaceutique..), et qui permettent de réaliser la régulation thermique d'un fluide.More specifically, it relates to a new type of boiler, the general structure uses heating means of the type of those described in WO-A-93 20389 for the production of heat exchangers heat used in many industrial sectors (industry chemical, pharmaceutical, etc.), which allow regulation to be carried out thermal of a fluid.

Selon les enseignements du document précité, de tels échangeurs se présentent sous la forme d'un ensemble comprenant des plaques présentant sur leurs deux faces des ondulations, par exemple en forme de chevrons, serrées entre elles entre deux fonds au moyen de tirants et qui comportent dans leurs angles des ouvertures qui délimitent dans l'empilement des passages d'entrée et de sortie permettant la circulation de fluides et qui s'écoulent contre la surface desdites plaques dans l'espace compris entre elles. Selon les enseignements de ce document, une plaque chauffante se présentant sous la forme d'un bloc homogène à l'intérieur duquel est noyée une résistance chauffante, bloc dont les dimensions extérieures et la structure des faces externes correspondent à celles des plaques élémentaires et qui comporte également dans ses angles des orifices correspondant à ceux desdites plaques, peut être intercalée entre deux plaques.According to the teachings of the aforementioned document, such exchangers are are in the form of a set comprising plates having corrugations on their two faces, for example in the form of rafters, clamped together between two bottoms by means of tie rods and which have in their corners openings which delimit in stacking of entry and exit passages allowing circulation fluids and which flow against the surface of said plates in the space between them. According to the teachings of this document, a heating plate in the form of a homogeneous block with the interior of which is embedded a heating resistor, a block whose external dimensions and the structure of the external faces correspond to those of the elementary plates and which also includes in its angles orifices corresponding to those of said plates, can be inserted between two plates.

Or, on a trouvé et c'est ce qui fait l'objet de la présente invention, qu'il était possible de réaliser une véritable chaudière électrique pour liquide caloporteur en circulation dans un circuit ouvert ou fermé, qui peut être facilement adaptée en fonction de la puissance souhaitée pour tout type d'installation en utilisant de tels ensembles constitués de deux plaques embouties, dont les ondulations sont dans le même sens sur leurs deux faces et entre lesquelles est intercalé un bloc chauffant se présentant sous la forme d'un bloc homogène, ledit ensemble selon l'invention se caractérisant en ce que :

  • les ondulations en forme de chevrons que présente le bloc chauffant sur ses deux faces externes, sont orientées en sens inverse ;
  • la résistance noyée dans la partie médiane dudit bloc chauffant s'étendant parallèlement aux plans tangents aux faces externes, des connexions électriques étant disposées latéralement.
Now, it has been found, and this is what is the subject of the present invention, that it was possible to produce a real electric boiler for heat transfer liquid circulating in an open or closed circuit, which can be easily adapted according to of the desired power for any type of installation using such assemblies consisting of two stamped plates, the corrugations of which are in the same direction on their two faces and between which is inserted a heating block in the form of a block homogeneous, said assembly according to the invention being characterized in that:
  • the chevron-shaped undulations which the heating block has on its two external faces are oriented in the opposite direction;
  • the resistance embedded in the middle part of said heating block extending parallel to the planes tangent to the external faces, electrical connections being arranged laterally.

Une telle adaptation selon laquelle les nervures ou ondulations en forme de chevrons des deux faces externes du bloc chauffant sont orientées en opposé, contrairement aux plaques élémentaires embouties où elles sont dans le même sens, permet de réaliser la juxtaposition de plusieurs blocs chauffants et d'obtenir un canal standard pour la circulation du fluide tout en ayant des raccordements électriques situés du même côté desdites plaques, rendant ainsi la connexion à un boitier électrique beaucoup plus simple. Such an adaptation according to which the ribs or undulations in chevron shape of the two outer faces of the heating block are opposite, unlike stamped elementary plates where they are in the same direction, allows to realize the juxtaposition of multiple heating blocks and get a standard channel for the circulation of the fluid while having electrical connections located on the same side of said plates, thus making the connection to a housing much simpler electric.

Conformément à l'invention, pour réaliser une chaudière, le bloc chauffant se présentera sous la forme d'un ensemble parallélépipédique ayant une épaisseur nettement plus importante que les plaques élémentaires permettant d'incorporer une résistance chauffante dans sa partie médiane.According to the invention, to make a boiler, the block heater will be in the form of a parallelepiped assembly having a significantly greater thickness than the plates elements to incorporate a heating resistance in its middle part.

Le bloc chauffant peut comporter une seule résistance, mais sa structure permet également d'envisager d'incorporer dans ce dernier trois résistances électriques connectées à une source triphasée.The heating block may have only one resistance, but its structure also allows to consider incorporating into the latter three electrical resistors connected to a three-phase source.

A titre indicatif, un tel bloc chauffant aura une épaisseur de quinze à vingt millimètres, alors que les plaques élémentaires embouties disposées de part et d'autre dudit bloc ont, quant à elles, un encombrement en épaisseur de l'ordre de trois millimètres (distance entre les ondulations de chaque face).As an indication, such a heating block will have a thickness of fifteen to twenty millimeters, while the stamped elementary plates arranged on either side of said block have, in turn, a space in thickness of the order of three millimeters (distance between the corrugations on each side).

Le bloc chauffant est réalisé dans tous matériaux conducteurs de la chaleur, notamment dans des matériaux tels que les métaux (aluminium par exemple), le graphite, les matières plastiques, les matériaux composites.The heating block is made of all conductive materials of the heat, especially in materials such as metals (aluminum for example), graphite, plastics, materials composites.

Un tel bloc est de préférence obtenue par moulage, une résistance électrique blindée étant incorporée lors de cette opération. Avantageusement, les nervures ou ondulations, en forme de chevrons, ainsi que la gorge périphérique sur l'une des faces pour la mise en place d'un joint, éléments qui correspondent à ceux d'une plaque élémentaire emboutie d'un échangeur à plaques, sont également réalisées lors de cette opération de moulage, bien qu'il pourrait être envisagé de réaliser ultérieurement par usinage. Such a block is preferably obtained by molding, a resistance electric shielded being incorporated during this operation. Advantageously, the ribs or undulations, in the form of chevrons, as well as the peripheral groove on one of the faces for positioning of a joint, elements which correspond to those of an elementary plate stamped from a plate heat exchanger, are also produced during this molding operation, although it could be envisaged to carry out later by machining.

Enfin, les deux surfaces extérieures dudit bloc chauffant, peuvent recevoir éventuellement un traitement de surface en fonction de la nature du liquide circulant contre ces parois. Un tel traitement peut être effectué par un revêtement de polytétrafluoroéthylène, de chrome, de nickel entre autres.Finally, the two outer surfaces of said heating block can possibly receive a surface treatment depending on the nature of the liquid circulating against these walls. Such treatment may be coated with polytetrafluoroethylene, chromium, nickel among others.

Grâce à un tel ensemble, il est donc possible de réaliser de manière simple la production d'eau chaude, par exemple pour une installation de chauffage ou à usage domestique (chauffe-eau), voire même la génération de vapeur.Thanks to such an assembly, it is therefore possible to carry out simple hot water production, for example for an installation of heating or domestic use (water heater), or even generation steam.

L'invention et les avantages qu'elle apporte sera cependant mieux compris grâce à l'exemple de réalisation qui suit, donné à titre indicatif et qui est illustré par les schémas annexés dans lesquels :

  • la figure 1 est une vue schématique en perspective édatée montrant la structure générale de la forme la plus simple d'une chaudière réalisée conformément à l'invention, les fonds et tirants permettant d'associer les différents éléments entrant dans la réalisation d'une telle chaudière n'étant pas représentés par mesure de simplification ;
  • les figures 2A et 2B sont des vues en élévation des deux faces du bloc chauffant conforme à l'invention entrant dans la réalisation d'une telle chaudière ;
  • la figure 3 est une vue de détail de la partie cerdée de la figure 2A, montrant en coupe la structure dudit bloc chauffant ;
  • les figures 4 et 5 illustrent une variante d'une chaudière conforme à l'invention comportant deux blocs chauffants juxtaposés, afin d'augmenter la puissance ainsi que les différents types de circulation de fluide qu'il est possible d'obtenir grâce à une telle chaudière.
The invention and the advantages which it brings will however be better understood thanks to the example of embodiment which follows, given as an indication and which is illustrated by the appended diagrams in which:
  • FIG. 1 is a schematic, eroded perspective view showing the general structure of the simplest form of a boiler produced in accordance with the invention, the bottoms and tie rods making it possible to associate the various elements involved in the production of such a boiler not being shown for simplification;
  • Figures 2A and 2B are elevational views of the two faces of the heating block according to the invention used in the production of such a boiler;
  • Figure 3 is a detail view of the crimped part of Figure 2A, showing in section the structure of said heating block;
  • Figures 4 and 5 illustrate a variant of a boiler according to the invention comprising two juxtaposed heating blocks, in order to increase the power as well as the different types of fluid circulation that it is possible to obtain thanks to such a boiler.

Si l'on se reporte aux schémas annexés, la chaudière conforme à l'invention qui permet de porter à une température prédéterminée un liquide caloporteur (FC) en circulation dans un circuit pouvant être ouvert ou fermé, a la structure suivante.If we refer to the attached diagrams, the boiler conforms to the invention which allows to bring to a predetermined temperature a heat transfer liquid (FC) circulating in a circuit which can be open or closed, has the following structure.

Dans sa forme de réalisation la plus simple qui ressort de la figure 1, cette chaudière se compose essentiellement de deux plaques embouties (P) présentant sur leurs deux faces, des ondulations, par exemple en forme de chevrons orientés dans le même sens.In its simplest embodiment which emerges from FIG. 1, this boiler essentially consists of two stamped plates (P) having on their two faces, undulations, for example in shape of chevrons oriented in the same direction.

Ces plaques (P) comportent dans leurs angles des ouvertures qui délimitent lorsqu'on les empile des passages d'entrée et de sortie permettant la circulation d'un fluide, circulation obtenue par l'intermédiaire d'un joint périphérique (J) associé à l'une des faces de chaque plaque (P).These plates (P) have in their corners openings which delimit entry and exit passages when stacked allowing the circulation of a fluid, circulation obtained by through a peripheral seal (J) associated with one of the faces of each plate (P).

Conformément à l'invention, entre deux plaques (P), on intercale un bloc chauffant (I) qui se présente sous la forme d'un bloc homogène à l'intérieur duquel est noyée une résistance électrique (R), et ce dans sa partie médiane (voir figures 2a, 2b et 3). Cette résistance est du type blindé et son incorporation est réalisée lors du moulage du bloc (I), bloc qui peut être à base de tous matériaux conducteurs tels que métal (aluminium), graphite, matière plastique .. . According to the invention, between two plates (P), a heating block (I) which is in the form of a homogeneous block with inside which an electrical resistance (R) is embedded, and this in its middle part (see Figures 2a, 2b and 3). This resistance is of the armored type and its incorporation is carried out during the molding of the block (I), block which can be based on all conductive materials such as metal (aluminum), graphite, plastic ...

Les dimensions extérieures de ce bloc (I) ainsi que la structure de ces faces externes (A,B), correspondent à celles des plaques élémentaires embouties (P), si ce n'est que les ondulations en forme de chevrons présentes sur ses faces externes (A,B), sont orientées en sens inverse, ce qui présente comme avantage, ainsi que cela sera vu dans la suite de la description, de pouvoir éventuellement juxtaposer plusieurs blocs chauffants lorsque l'on souhaite augmenter la puissance tout en ayant des raccordements électriques disposés du même côté des plaques.The external dimensions of this block (I) as well as the structure of these external faces (A, B), correspond to those of the elementary plates stamped (P), except that the chevron-shaped undulations present on its external faces (A, B), are oriented in opposite directions, this which has the advantage, as will be seen in the following of the description, to be able to juxtapose several blocks heating when you want to increase the power while having electrical connections arranged on the same side of the plates.

Si l'on se reporte à la figure 1, et en isolant les orifices (3,4,5,6) des plaques élémentaires (P) et du bloc chauffant (1) comme illustré sur cette figure, le liquide (FC) s'écoule donc contre la surface du bloc chauffant (I) dans les canaux formés par la coopération des ondulations que présentent les faces dudit bloc (I) avec celles que comportent les surfaces en regard des plaques embouties (P).If we refer to FIG. 1, and by isolating the orifices (3,4,5,6) of the elementary plates (P) and the heating block (1) as illustrated on this figure, the liquid (FC) therefore flows against the surface of the heating block (I) in the channels formed by the cooperation of the undulations that present the faces of said block (I) with those which the surfaces comprise opposite the stamped plates (P).

A titre d'exemple, il est possible de réaliser une chaudière électrique conforme à l'invention utilisant deux plaques élémentaires embouties (P) conventionnelles pour la réalisation d'échangeurs de chaleur ayant une dimension de 350 x 102 et une épaisseur prise entre les sommets des ondulations de ladite plaque de l'ordre de trois millimètres, en interposant entre deux plaques élémentaires (P) un bloc chauffant (I) ayant une épaisseur de quinze millimètres à l'intérieur de laquelle est noyée une résistance chauffante du type blindé, ayant un diamètre d'environ 6,5 mm et une puissance de 3000 watts/220 volts.For example, it is possible to make an electric boiler according to the invention using two elementary stamped plates (P) conventional for the production of heat exchangers having a dimension of 350 x 102 and a thickness taken between the vertices of the undulations of said plate of the order of three millimeters, in interposing between two elementary plates (P) a heating block (I) having a thickness of fifteen millimeters inside which is embedded a heating resistor of the armored type, having a diameter about 6.5 mm and a power of 3000 watts / 220 volts.

Il convient également de noter que la résistance (R) a une configuration telle qu'elle s'étend dans la partie médiane du bloc chauffant, et ce à l'intérieur de la surface définie par le joint périphérique (I). It should also be noted that the resistance (R) has a configuration as it extends in the middle part of the block heating, and this inside the surface defined by the peripheral joint (I).

Une telle conception permet de réaliser de manière simple des chaudières faciles à monter à partir d'éléments pouvant être produits en grande série.Such a design makes it possible to carry out in a simple manner boilers easy to assemble from elements that can be produced in large series.

Par ailleurs, une telle conception permet également d'adapter facilement la puissance de la chaudière en fonction des besoins. Par exemple, la puissance étant directement proportionnelle au nombre de blocs chauffants, il est possible de l'augmenter en juxtaposant un nombre déterminé de modules, tels qu' illustrés à la figure 2 (deux plaques embouties, un bloc chauffant), la circulation de fluide caloporteur s'effectuant toujours entre les blocs chauffants et les plaques embouties.Furthermore, such a design also makes it possible to adapt easily the power of the boiler according to the needs. By example, the power being directly proportional to the number of heating blocks, it is possible to increase it by juxtaposing a number determined of modules, as illustrated in figure 2 (two plates stamped, a heating block), the circulation of heat transfer fluid always performed between the heating blocks and the stamped plates.

Une autre possibilité pour augmenter la puissance de la chaudière peut consister, comme cela ressort des figures 4 et 5, de juxtaposer plusieurs plaques chauffantes, la puissance totale étant également proportionnelle au nombre de blocs chauffants (I). Dans ces figures 4 et 5, les plaques élémentaires embouties (P) au nombre de deux, enserrent entre elles deux blocs chauffants (I) juxtaposés. Il est évident que l'on pourrait réaliser une chaudière comportant un nombre plus important de blocs chauffants (I) juxtaposés.Another possibility to increase the power of the boiler may consist, as shown in Figures 4 and 5, of juxtaposing several hot plates, the total power also being proportional to the number of heating blocks (I). In these figures 4 and 5, the two stamped elementary plates (P) two in number, enclose between them two juxtaposed heating blocks (I). It is obvious that we could make a boiler with a larger number of heating blocks (I) juxtaposed.

Il convient également de noter que la conception d'une chaudière conforme à l'invention permet de l'adapter très facilement en fonction du débit de fluide caloporteur et de l'écart de température que l'on souhaite avoir.It should also be noted that the design of a boiler according to the invention makes it possible to adapt it very easily according to the heat transfer fluid flow and the temperature difference that wish to have.

Ainsi, dans la forme de réalisation illustrée à la figure 4, tous les canaux du fluide caloporteur sont en parallèles (circulation monopasse). Une telle disposition est particulièrement adaptée lorsque le débit du fluide caloporteur est important pour un faible écart de température. Thus, in the embodiment illustrated in Figure 4, all heat transfer fluid channels are in parallel (single pass circulation). Such an arrangement is particularly suitable when the flow of the heat transfer fluid is important for a small temperature difference.

La figure 5 illustre le même type de chaudière adaptée à un débit de fluide faible mais avec un écart de température important, la circulation du fluide étant alors réalisée en série (circulation multipasse). Pour ce faire, il suffit d'obturer alternativement les ouvertures (3) et (6) des plaques successives.Figure 5 illustrates the same type of boiler adapted to a flow of weak fluid but with a significant temperature difference, the circulation fluid is then produced in series (multi-pass circulation). For this do, it is enough to alternately close the openings (3) and (6) of the successive plates.

Il pourrait également être envisagé de réaliser une chaudière combinant une circulation série/parallèle.It could also be envisaged to make a boiler combining a series / parallel circulation.

Outre la grande souplesse qu'offre la conception d'une chaudière conforme à l'invention, il convient également de noter que l'échange thermique entre la ou les blocs chauffants et le liquide en circulation, est pratiquement parfait, uniforme, sans point de surchauffe, tel que par exemple la différence de température entre les faces dudit bloc chauffant n'est d'environ que de 2°C pour une température à 90°C.Besides the great flexibility offered by the design of a boiler in accordance with the invention, it should also be noted that the exchange between the heating block (s) and the circulating liquid, is practically perfect, uniform, with no overheating point, such as example the temperature difference between the faces of said heating block is only about 2 ° C for a temperature of 90 ° C.

Claims (6)

  1. Electric boiler for heat-transfer liquid (FC) circulating in an open or closed circuit, being in the form of an assembly comprising plates (P) having, on both their faces, corrugations, for example herringbone corrugations, clamped together between two end walls by means of ties, and which include, in their corners, openings (3,4,5,6) which delimit, in the stack, inlet and outlet passages allowing circulation o fluid which flows against the surface of said plates in the space lying between them, said assembly consisting of at least one module including two stamped plates (P), the corrugations of which are in the same sense on both their faces and between which is inserted at least one heater block (I) which is in the form of a uniform block inside which a heater resistance element (R) is embedded, the outside dimensions and the structure of the external faces of which block correspond to those of the elementary plates (P), said block also including, in its corners, orifices (3,4,5,6) corresponding to those of said stamped plates (P), characterized in that :
    the herringbone corrugations that the heater block (I) has on both its external faces (A and B) are oriented in opposite senses ;
    the resistance element (R) embedded in the central part of the heater block (I) extends parallel to the external faces (A,B), the electrical connections being arranged laterally.
  2. Electric boiler according to claim 1, characterized in that it includes a plurality of juxtaposed heater blocks (I) inserted between two stamped plates (P), the electrical connections being arranged laterally on the same side.
  3. Boiler according to any one of claims 1 and 2, characterized in that the heater block (I) is based on a conductive material chosen from the group comprising metals, composites, graphites, and plastics.
  4. Boiler according to one of claims 1 to 3, , characterized in that the heater block (I) is obtained by molding, the shielded electrical resistance element (R) being incorporated during this operation.
  5. Boiler according according to one of claims 1 to 4, characterized in that the active outside surface of the heater block (I) receives a surface treatment.
  6. Boiler according to claim 5 , characterized in that the surface treatment of the heater block (I) consists of a coating of polytetrafluoroethylene, chromium or nickel.
EP95902177A 1993-11-25 1994-11-25 Electric boiler for heat transfer liquid circulating in an open or closed system Expired - Lifetime EP0680585B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9314351A FR2712964B1 (en) 1993-11-25 1993-11-25 Electric boiler for heat transfer liquid circulating in an open or closed circuit.
FR9314351 1993-11-25
PCT/FR1994/001377 WO1995014893A1 (en) 1993-11-25 1994-11-25 Electric boiler for heat transfer liquid circulating in an open or closed system

Publications (2)

Publication Number Publication Date
EP0680585A1 EP0680585A1 (en) 1995-11-08
EP0680585B1 true EP0680585B1 (en) 1998-05-27

Family

ID=9453398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95902177A Expired - Lifetime EP0680585B1 (en) 1993-11-25 1994-11-25 Electric boiler for heat transfer liquid circulating in an open or closed system

Country Status (9)

Country Link
US (1) US5727118A (en)
EP (1) EP0680585B1 (en)
AT (1) ATE166711T1 (en)
CA (1) CA2154360A1 (en)
DE (1) DE69410594T2 (en)
DK (1) DK0680585T3 (en)
ES (1) ES2119367T3 (en)
FR (1) FR2712964B1 (en)
WO (1) WO1995014893A1 (en)

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GB2305233A (en) * 1995-09-15 1997-04-02 Welwyn Components Ltd Water heater with thick film printed circuit
ES2229512T5 (en) * 1997-06-24 2009-06-02 Micro-Heat, Inc. DEFROSTING OF WINDSHIELD.
FR2775066B1 (en) * 1998-02-18 2000-06-02 Joel Bucaille PLATE FOR FORMING AN EXCHANGER AND METHOD OF USE
AUPP410598A0 (en) 1998-06-15 1998-07-09 Aos Pty Ltd Heat exchangers
AU768717C (en) * 1998-06-15 2004-07-01 Rheem Australia Pty Limited Water heater and water heater component construction
US6669109B2 (en) * 1998-11-06 2003-12-30 Micro-Heat Inc Apparatus for cleaning or de-icing a vehicle window
EP1285203A4 (en) * 1999-12-14 2006-06-21 Rheem Australia Pty Ltd Water heater and water heater component construction
AUPQ792400A0 (en) * 2000-06-02 2000-06-29 Southcorp Australia Pty Ltd Improved heat exchange element
SE516844C3 (en) 2000-07-07 2002-04-17 Alfa Laval Ab Plate heat / plate heat exchanger with electrically heated layers in double wall plate elements
FR2823995B1 (en) * 2001-04-25 2008-06-06 Alfa Laval Vicarb IMPROVED DEVICE FOR EXCHANGING AND / OR REACTING BETWEEN FLUIDS
PL366623A1 (en) * 2001-05-14 2005-02-07 Microheat Inc. System and method for cleaning or de-icing a windshield
DE20211040U1 (en) * 2002-07-22 2002-11-21 Elite Plus Int'l Inc., Pali Hsiang, Taipeh energy exchanger
WO2004035358A2 (en) * 2002-10-21 2004-04-29 Microheat Inc. Apparatus and method for cleaning or de-icing vehicle elements
WO2005076735A2 (en) 2004-02-12 2005-08-25 Microheat Inc. Apparatus and method for cleaning and de-icing
TW200738328A (en) 2006-03-31 2007-10-16 Lonza Ag Micro-reactor system assembly
US8391695B2 (en) 2006-07-24 2013-03-05 M-Heat Investors, Llc Vehicle surfaces cleaning and de-icing system and method
US8666238B2 (en) * 2008-08-06 2014-03-04 Nexthermal Corporation Fluid preheater
EP2689945B1 (en) * 2012-07-24 2017-05-31 MAHLE Behr GmbH & Co. KG Heating device
EP2757336B1 (en) * 2013-01-18 2017-11-08 Robert Bosch Gmbh Heat exchanger with optimised heat transmission and heating device with such a heat exchanger
EP2957848A1 (en) 2014-06-17 2015-12-23 Alfa Laval Corporate AB A heater and a heat exchanger installation
DE102015012557A1 (en) * 2015-09-25 2017-03-30 Webasto SE Heat exchanger and vehicle heater with a heat exchanger
CN111425839A (en) * 2020-02-27 2020-07-17 陶礼德 Module integrated quick heating type electric boiler main machine and manufacturing process thereof
ES2947513T3 (en) * 2020-12-15 2023-08-10 Alfa Laval Corp Ab heat transfer plate

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SE415928B (en) * 1979-01-17 1980-11-10 Alfa Laval Ab PLATTVERMEVEXLARE
NL8700430A (en) * 1987-02-20 1988-09-16 Texas Instruments Holland HEATING DEVICE FOR FUEL, IN PARTICULAR DIESEL OIL.
FR2689227B1 (en) * 1992-03-27 1999-05-14 Joel Bucaille DEVICE FOR THERMAL REGULATION OF A FLUID IN CIRCULATION.

Also Published As

Publication number Publication date
DE69410594D1 (en) 1998-07-02
EP0680585A1 (en) 1995-11-08
WO1995014893A1 (en) 1995-06-01
FR2712964A1 (en) 1995-06-02
CA2154360A1 (en) 1995-06-01
FR2712964B1 (en) 1995-12-29
US5727118A (en) 1998-03-10
ATE166711T1 (en) 1998-06-15
DE69410594T2 (en) 1999-03-25
DK0680585T3 (en) 1999-03-22
ES2119367T3 (en) 1998-10-01

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