EP0680585A1 - 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

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Publication number
EP0680585A1
EP0680585A1 EP95902177A EP95902177A EP0680585A1 EP 0680585 A1 EP0680585 A1 EP 0680585A1 EP 95902177 A EP95902177 A EP 95902177A EP 95902177 A EP95902177 A EP 95902177A EP 0680585 A1 EP0680585 A1 EP 0680585A1
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EP
European Patent Office
Prior art keywords
plates
faces
block
heating
heating block
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.)
Granted
Application number
EP95902177A
Other languages
German (de)
French (fr)
Other versions
EP0680585B1 (en
Inventor
Claude Roussel
Fabrice Chopard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vicarb SA
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Vicarb SA
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Publication date
Application filed by Vicarb SA filed Critical Vicarb SA
Publication of EP0680585A1 publication Critical patent/EP0680585A1/en
Application granted granted Critical
Publication of EP0680585B1 publication Critical patent/EP0680585B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • 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 making it possible to bring a heat transfer liquid to a predetermined temperature.
  • such exchangers are in the form of an assembly comprising plates having on their two faces corrugations, for example in the form of
  • the heating block will be in the form of a parallelepiped assembly having a thickness significantly greater than the elementary plates making it possible to incorporate a heating resistor in its middle part.
  • the heating block can comprise a single resistance, but its structure also makes it possible to envisage incorporating into the latter three electrical resistances connected to a three-phase source.
  • such a heating block will have a thickness of fifteen to twenty millimeters, while the stamped elementary plates disposed on either side of said block have, in turn, a thickness in the order of three millimeters ( distance between the undulations of each face).
  • the heating block is made of all heat conducting materials, in particular in materials such as metals (aluminum for example), graphite, plastics, composite materials.
  • Such a block is preferably obtained by molding, an armored electrical resistance being incorporated during this operation.
  • the ribs or corrugations, in the form of chevrons, as well as the peripheral groove on one of the faces for the installation of a seal, elements which correspond to those of an elementary plate stamped with a plate exchanger. are also carried out during this molding operation, although it could be envisaged to carry out later by machining.
  • the two outer surfaces of said heating block can optionally receive a surface treatment depending on the nature of the liquid flowing against these walls. Such a treatment can be carried out with a coating of polyethylene tetrafluoroethylene, chromium, nickel among others.
  • FIG. 1 is a schematic exploded 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 a such a boiler not being represented by simplification measure;
  • FIGS. 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;
  • FIG. 3 is a detail view of the circled part of Figure 2A, showing in section the structure of said heating block;
  • FIG. 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 which it is possible to obtain by means of a such a boiler.
  • the boiler according to the invention which makes it possible to bring to a predetermined temperature a heat transfer liquid (FC) circulating in a circuit which can be opened or closed, has the following structure.
  • FC heat transfer liquid
  • this boiler consists essentially of two stamped plates (P) having on their two faces, corrugations, for example in the form of chevrons oriented in the same direction.
  • These plates (P) have in their corners openings which delimit, when stacked, inlet and outlet passages allowing the circulation of a fluid, circulation obtained by means of a peripheral seal (J) associated with one of the faces of each plate (P).
  • a heating block (I) is interposed which is in the form of a homogeneous block 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 material.
  • this block (I) as well as the structure of these external faces (A, B), correspond to those of the stamped elementary plates (P), except that the corrugations in the form of chevrons present on its faces external (A, B), are oriented in opposite directions, which has the advantage, as will be seen in the following description, of being able to optionally juxtapose several heating blocks when it is desired to increase the power while having electrical connections arranged on the same side of the plates.
  • the liquid (FC) s 'therefore flows against the surface of the heating block (I) in the channels formed by the cooperation of the corrugations which have the faces of said block (I) with those which comprise the facing surfaces of the pressed plates (P).
  • an electric boiler according to the invention using two conventional stamped elementary plates (P) for the production of heat exchangers having a dimension of 350 ⁇ 102 and a thickness taken between the tops undulations of said plate of the order of three millimeters, by 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 of about 6.5 mm and a power of 3000 watts / 220 volts.
  • the resistor (R) has a configuration such that it extends in the middle part of the heating block, and this inside the surface defined by the peripheral seal (I). Such a design makes it easy to make boilers that are easy to assemble from elements that can be mass produced.
  • such a design also makes it possible to easily adapt the power of the boiler as required.
  • the power being directly proportional to the number of heating blocks, it is possible to increase it by juxtaposing a determined number of modules, as illustrated in FIG. 2 (two stamped plates, one heating block), the circulation of heat transfer fluid always carried out between the heating blocks and the pressed plates.
  • FIGS. 4 and 5 Another possibility for increasing the power of the boiler can consist, as is shown in FIGS. 4 and 5, of juxtaposing several heating plates, the total power also being proportional to the number of heating blocks (I).
  • the elementary stamped plates (P) two in number, enclose between them two heating blocks (I) juxtaposed. It is obvious that a boiler could be produced comprising a larger number of juxtaposed heating blocks (I).
  • FIG. 5 illustrates the same type of boiler adapted to a low fluid flow rate but with a large temperature difference, the circulation of the fluid then being carried out in series (multi-pass circulation). To do this, it suffices alternately to close the openings (3) and (6) of the successive plates.
  • the heat exchange between the heating block (s) and the liquid in circulation is practically perfect, uniform, without point of overheating, such as for example the temperature difference between the faces of said heating block is only about 2 ° C. for a temperature at 90 ° C.
  • the invention is not limited to the embodiment described above, but it covers all the variants produced in the same spirit.
  • it could be envisaged to have a heating block in which the corrugations on the two faces (A, B) are oriented in the same direction, but then the electrical assembly would be complicated.

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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

CHAUDIERE ELECTRIQUE POUR LIQUIDE CALOPORTEUR EN CIRCULATION DANS UN CIRCUIT OUVERT OU FERME. ELECTRIC BOILER FOR HEAT LIQUID FLOWING IN AN OPEN OR CLOSED CIRCUIT.
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 making it possible to bring a heat transfer liquid to a predetermined temperature.
Elle a trait plus particulièrement à un nouveau type de chaudière électrique permettant d'assurer la production d'eau chaude, par exempleIt relates more particularly to a new type of electric boiler making it possible to ensure the production of hot water, for example
10 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 ...).10 when it is desired to produce domestic hot water (circulation of water in an open circuit), or for water heating installations circulating in a closed circuit (industrial heating, domestic heating, etc.).
15 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 20 thermique d'un fluide.15 More specifically, it relates to a new type of boiler, the general structure of which employs heating means of the type described in WO-A-93 20389 for producing heat exchangers used in many industrial sectors ( chemical, pharmaceutical industry), and which make it possible to carry out thermal regulation 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 deAccording to the teachings of the aforementioned document, such exchangers are in the form of an assembly comprising plates having on their two faces corrugations, for example in the form of
^5 chevrons, serrées entre elles entre deux fonds au moyen de tirants et qui comportent dans leurs angles des ouvertures qui délimitent dans^ 5 rafters, clamped together between two bottoms by means of tie rods and which have in their angles openings which delimit in
, l'empilement des passages d'entrée et de sortie permettant la circulation à de fluides et qui s'écoulent contre la surface desdites plaques dans, the stack of inlet and outlet passages allowing circulation to fluids and which flow against the surface of said plates in
* l'espace compris entre elles. Selon les enseignements de ce document,* the space between them. According to the teachings of this document,
30 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.30 a heating plate in the form of a homogeneous block inside which is embedded a heating resistor, 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 interposed 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 intercalée un bloc chauffant se présentant sous la forme d'un bloc homogène, ledit ensemble selon l'invention se caractérisant en ce que :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:
- les ondulations en forme de chevrons que présente le bloc chauffant sur ses deux faces, sont orientées en sens inverse ;- the chevron-shaped corrugations that the heating block has on its two faces, are oriented in opposite directions;
- la résistance noyée dans la partie médiane dudit bloc chauffant s'étendant parallèlement aux faces actives, des connexions électriques étant disposées latéralement.- The resistance embedded in the middle part of said heating block extending parallel to the active 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. 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.Such an adaptation according to which the ribs or corrugations in the form of chevrons of the two external faces of the heating block are oriented in opposite, unlike the elementary stamped plates where they are in the same direction, makes it possible to carry out the juxtaposition of several heating blocks and obtain 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 an electrical box much simpler. According to the invention, to produce a boiler, the heating block will be in the form of a parallelepiped assembly having a thickness significantly greater than the elementary plates making it possible to incorporate a heating resistor 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 can comprise a single resistance, but its structure also makes it possible to envisage incorporating into the latter three electrical resistances 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 disposed on either side of said block have, in turn, a thickness in the order of three millimeters ( distance between the undulations of each face).
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 heat conducting materials, in particular in materials such as metals (aluminum for example), graphite, plastics, composite materials.
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. 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 poiytétrafluoroéthylène, de chrome, de nickel entre autres.Such a block is preferably obtained by molding, an armored electrical resistance being incorporated during this operation. Advantageously, the ribs or corrugations, in the form of chevrons, as well as the peripheral groove on one of the faces for the installation of a seal, elements which correspond to those of an elementary plate stamped with a plate exchanger. , are also carried out during this molding operation, although it could be envisaged to carry out later by machining. Finally, the two outer surfaces of said heating block can optionally receive a surface treatment depending on the nature of the liquid flowing against these walls. Such a treatment can be carried out with a coating of polyethylene tetrafluoroethylene, 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 in a simple manner the production of hot water, for example for a heating installation or for domestic use (water heater), or even the generation of 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 mais non limitatif et qui est illustré par les schémas annexés dans lesquels :The invention and the advantages which it brings will however be better understood thanks to the embodiment which follows, given by way of indication but not limitation and which is illustrated by the appended diagrams in which:
- la figure 1 est une vue schématique en perspective éclatée 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 ;- Figure 1 is a schematic exploded 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 a such a boiler not being represented by simplification measure;
- 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'tme telle chaudière ;- 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;
- la figure 3 est une vue de détail de la partie cerclée de la figure 2A, montrant en coupe la structure dudit bloc chauffant ;- Figure 3 is a detail view of the circled part of Figure 2A, showing in section the structure of said heating block;
- 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. 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.- 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 which it is possible to obtain by means of a such a boiler. If reference is made to the appended diagrams, the boiler according to the invention which makes it possible to bring to a predetermined temperature a heat transfer liquid (FC) circulating in a circuit which can be opened 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 Figure 1, this boiler consists essentially of two stamped plates (P) having on their two faces, corrugations, for example in the form 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, when stacked, inlet and outlet passages allowing the circulation of a fluid, circulation obtained by means of 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) is interposed which is in the form of a homogeneous block 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 material.
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 stamped elementary plates (P), except that the corrugations in the form of chevrons present on its faces external (A, B), are oriented in opposite directions, which has the advantage, as will be seen in the following description, of being able to optionally juxtapose several heating blocks when it is desired 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).Referring to FIG. 1, and by isolating the orifices (3,4,5,6) of the elementary plates (P) and of the heating block (1) as illustrated in this figure, the liquid (FC) s 'therefore flows against the surface of the heating block (I) in the channels formed by the cooperation of the corrugations which have the faces of said block (I) with those which comprise the facing surfaces of the pressed 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'echangeurs 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 produce an electric boiler according to the invention using two conventional stamped elementary plates (P) for the production of heat exchangers having a dimension of 350 × 102 and a thickness taken between the tops undulations of said plate of the order of three millimeters, by 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 of 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). Une telle conception permet de réaliser de manière simple des chaudières faciles à monter à partir d'éléments pouvant être produits en grande série.It should also be noted that the resistor (R) has a configuration such that it extends in the middle part of the heating block, and this inside the surface defined by the peripheral seal (I). Such a design makes it easy to make boilers that are easy to assemble from elements that can be mass produced.
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 easily adapt the power of the boiler as required. For example, the power being directly proportional to the number of heating blocks, it is possible to increase it by juxtaposing a determined number of modules, as illustrated in FIG. 2 (two stamped plates, one heating block), the circulation of heat transfer fluid always carried out between the heating blocks and the pressed 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 for increasing the power of the boiler can consist, as is shown in FIGS. 4 and 5, of juxtaposing several heating plates, the total power also being proportional to the number of heating blocks (I). In these Figures 4 and 5, the elementary stamped plates (P) two in number, enclose between them two heating blocks (I) juxtaposed. It is obvious that a boiler could be produced comprising a larger number of juxtaposed heating blocks (I).
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 in accordance with the invention makes it possible to adapt it very easily as a function of the flow rate of heat transfer fluid and of the temperature difference that it is desired 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. 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.Thus, in the embodiment illustrated in Figure 4, all the channels of the heat transfer fluid are in parallel (single pass circulation). Such an arrangement is particularly suitable when the flow rate of the heat transfer fluid is high for a small temperature difference. FIG. 5 illustrates the same type of boiler adapted to a low fluid flow rate but with a large temperature difference, the circulation of the fluid then being carried out in series (multi-pass circulation). To do this, it suffices alternately to 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 produce 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.In addition to the great flexibility offered by the design of a boiler in accordance with the invention, it should also be noted that the heat exchange between the heating block (s) and the liquid in circulation is practically perfect, uniform, without point of overheating, such as for example the temperature difference between the faces of said heating block is only about 2 ° C. for a temperature at 90 ° C.
Bien entendu, l'invention n'est pas limitée à l'exemple de réalisation décrit précédemment, mais elle en couvre toutes les variantes réalisées dans le même esprit. Ainsi, il pourrait être envisagé d'avoir un bloc chauffant dans lequel les ondulations sur les deux faces (A,B) sont orientées dans le même sens, mais alors le montage électrique s'en trouverait compliqué. Of course, the invention is not limited to the embodiment described above, but it covers all the variants produced in the same spirit. Thus, it could be envisaged to have a heating block in which the corrugations on the two faces (A, B) are oriented in the same direction, but then the electrical assembly would be complicated.

Claims

REVENDICATIONS
1/ Chaudière électrique pour liquide caloporteur (FC) en circulation dans un circuit ouvert ou fermé, se présentant sous la forme d'un ensemble comprenant des plaques (P) 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 (3,4,5,6) qui délimitent dans l'empilement des passages d'entrée et de sortie permettant la circulation de fluide qui s'écoule contre la surface desdites plaques dans l'espace compris entre elles, ledit ensemble étant constitué d'au moins un module comportant deux plaques (P) embouties dont les ondulations sont dans le même sens sur leurs deux faces entre lesquelles est intercalée au moins un bloc chauffant (I) se présentant sous la forme d'un bloc homogène à l'intérieur duquel est noyée une résistance chauffante (R), dont les dimensions extérieures et la structure des faces externes correspondent à celles des plaques élémentaires (P), ledit bloc comportant également, dans ses angles, des orifices (3,4,5,6) correspondant à ceux desdites plaques embouties (P), caractérisée en ce que :1 / Electric boiler for heat transfer liquid (FC) circulating in an open or closed circuit, in the form of an assembly comprising plates (P) having corrugations on their two faces, for example in the form of chevrons, tight between them between two bottoms by means of tie rods, and which have in their angles openings (3,4,5,6) which delimit in the stack inlet and outlet passages allowing the circulation of flowing fluid against the surface of said plates in the space between them, said assembly consisting of at least one module comprising two stamped plates (P) whose corrugations are in the same direction on their two faces between which is interposed at least one block heater (I) in the form of a homogeneous block inside which is embedded a heating resistor (R), whose external dimensions and the structure of the external faces correspond to those of s elementary plates (P), said block also comprising, in its angles, orifices (3,4,5,6) corresponding to those of said stamped plates (P), characterized in that:
- les ondulations en forme de chevrons que présente le bloc chauffant (I) sur ses deux faces (A) et (B), sont orientées en sens inverse- the chevron-shaped corrugations presented by the heating block (I) on its two faces (A) and (B), are oriented in opposite directions
- la résistance (R) noyée dans la partie médiane du bloc chauffant (I) s'étend parallèlement aux faces actives, les connexions électriques étant disposées latéralement.- The resistor (R) embedded in the middle part of the heating block (I) extends parallel to the active faces, the electrical connections being arranged laterally.
2/ Chaudière électrique selon la revendication 1, caractérisée en ce qu'elle comporte une pluralité de blocs chauffants (I) juxtaposés intercalées entre deux plaques (P) embouties, les connexions électriques étant disposées latéralement sur le même côté. 3/ Chaudière selon l'une des revendications 1 et 2, caractérisée en ce que le bloc chauffant (I) est à base d'un matériau conducteur choisi dans le groupe comprenant les métaux (aluminium par exemple), les composites, graphites, matières plastiques.2 / electric boiler according to claim 1, characterized in that it comprises a plurality of heating blocks (I) juxtaposed interposed between two plates (P) stamped, the electrical connections being arranged laterally on the same side. 3 / Boiler according to one of claims 1 and 2, characterized in that the heating block (I) is based on a conductive material selected from the group comprising metals (aluminum for example), composites, graphites, materials plastics.
4/ Chaudière selon l'une des revendications 1 à 3, caractérisée en ce que le bloc chauffant (I) est obtenue par moulage, la résistance électrique (R) blindée étant incorporée lors de cette opération.4 / Boiler according to one of claims 1 to 3, characterized in that the heating block (I) is obtained by molding, the electrical resistance (R) shielded being incorporated during this operation.
5/ Chaudière selon l'une des revendications 1 à 4, caractérisée en ce que la surface extérieure active du bloc chauffant (I) reçoit un traitement de surface.5 / Boiler according to one of claims 1 to 4, characterized in that the active outer surface of the heating block (I) receives a surface treatment.
6/ Chaudière selon la revendication 5, caractérisée en ce que le traitement de surface du bloc chauffant (I) est constitué par un revêtement de poiytétrafluoroéthylène, de chrome, de nickel. 6 / Boiler according to claim 5, characterized in that the surface treatment of the heating block (I) consists of a coating of polyethylene tetrafluoroethylene, chromium, 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
FR9314351 1993-11-25
FR9314351A FR2712964B1 (en) 1993-11-25 1993-11-25 Electric boiler for heat transfer liquid circulating in an open or closed circuit.
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 true EP0680585A1 (en) 1995-11-08
EP0680585B1 EP0680585B1 (en) 1998-05-27

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

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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)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2305233A (en) * 1995-09-15 1997-04-02 Welwyn Components Ltd Water heater with thick film printed circuit
CA2294103C (en) * 1997-06-24 2007-01-16 Micro-Heat, Inc. Windshield de-icing
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
JP2003517559A (en) * 1999-12-14 2003-05-27 リーム オーストラリア ピーティーワイ リミテッド Water heater and water heater member structure
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
BR0209595A (en) * 2001-05-14 2006-01-17 Microheat Inc System and method for cleaning or defogging a windshield
DE20211040U1 (en) * 2002-07-22 2002-11-21 Elite Plus Int L Inc energy exchanger
BR0315451A (en) * 2002-10-21 2005-08-09 Microheat Inc Device and method for cleaning or defrosting vehicle components
CZ2006518A3 (en) * 2004-02-12 2007-03-21 Microheat Inc. Apparatus for and method of cleaning or de-icing
TW200738328A (en) 2006-03-31 2007-10-16 Lonza Ag Micro-reactor system assembly
JP5059858B2 (en) 2006-07-24 2012-10-31 エム−ヒート インベスターズ，リミティド ライアビリティ カンパニー Vehicle surface cleaning and deicing systems and methods
WO2010017095A2 (en) * 2008-08-06 2010-02-11 Hotset 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
RS64264B1 (en) * 2020-12-15 2023-07-31 Alfa Laval Corp Ab Heat transfer plate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9514893A1 *

Also Published As

Publication number Publication date
FR2712964A1 (en) 1995-06-02
FR2712964B1 (en) 1995-12-29
EP0680585B1 (en) 1998-05-27
ES2119367T3 (en) 1998-10-01
WO1995014893A1 (en) 1995-06-01
CA2154360A1 (en) 1995-06-01
DE69410594D1 (en) 1998-07-02
DK0680585T3 (en) 1999-03-22
US5727118A (en) 1998-03-10
ATE166711T1 (en) 1998-06-15
DE69410594T2 (en) 1999-03-25

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