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EP0807367A1 - Heating element with a diffusing plate, and method for assembling same - Google Patents

Heating element with a diffusing plate, and method for assembling same

Info

Publication number
EP0807367A1
EP0807367A1 EP96902320A EP96902320A EP0807367A1 EP 0807367 A1 EP0807367 A1 EP 0807367A1 EP 96902320 A EP96902320 A EP 96902320A EP 96902320 A EP96902320 A EP 96902320A EP 0807367 A1 EP0807367 A1 EP 0807367A1
Authority
EP
European Patent Office
Prior art keywords
electric heating
heating element
assembly according
heating assembly
plate
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
EP96902320A
Other languages
German (de)
French (fr)
Other versions
EP0807367B1 (en
Inventor
Henri Galliou
Roger Schaich
Alain Bourdin
Gérard Saudry-Dreyer
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.)
SEB SA
Original Assignee
SEB SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR9501347A external-priority patent/FR2730119B1/en
Priority claimed from FR9501348A external-priority patent/FR2730120B1/en
Application filed by SEB SA filed Critical SEB SA
Publication of EP0807367A1 publication Critical patent/EP0807367A1/en
Application granted granted Critical
Publication of EP0807367B1 publication Critical patent/EP0807367B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/688—Fabrication of the plates

Definitions

  • the present invention relates to the field of electric heating assemblies in general and applies more particularly to electric heating assemblies comprising at least one diffusing plate and at least one heating element fixed against said plate. According to an advantageous variant of the invention, a cover plate is also provided.
  • Electric heating assemblies with diffusing plates are already known.
  • One of the drawbacks of these assemblies lies in the complexity of the method of assembling the various constituent elements.
  • the heating elements are fixed to another element such as a support, for example by welding.
  • the production of such a weld requires sophisticated tools and involves a long and costly operating mode. This operation greatly affects the aesthetic appearance of the attached elements, and is the source of many quality problems.
  • Heating elements are also known which are fixed by crimping, gluing, or by means of riveted, screwed, welded, etc. fasteners. In such cases, the resulting assembly often has certain weaknesses in terms of cohesion between the elements which can considerably affect the durability of the product. In addition, the many parts required for assembly often complicate it and make it expensive.
  • the invention specifically aims to remedy the aforementioned drawbacks and / or limitations, and proposes a method for producing an electric heating assembly comprising at least one diffusing plate and at least one heating element fixed against said plate, said assembly being produced by hot stamping.
  • the invention also provides the electric heating assembly assembled by hot stamping resulting.
  • diffusing plates can be used in which the profile of the heating element:
  • a groove is then preformed in the plate or plates in question.
  • the path of the groove is advantageously similar to that of the corresponding heating element.
  • the material of the diffusing plate at least partially interferes around the heating elements by creep of this material.
  • the material of the diffusing plate fills the portion of the groove initially left free by the heating element, so as to at least partially surround the latter. In this way, a resistant and durable fixing is obtained.
  • the striking tool is advantageously shaped as a function of the profile of the heating element, in particular with the aim of minimizing the stresses suffered by the latter during striking.
  • Another object of the invention is to propose an electric heating assembly which is perfectly sealed.
  • an electric heating assembly comprising at least one diffusing plate and at least one heating element disposed against the diffusing plate, comprising the following steps:
  • the heating elements are arranged against the diffusing plate, -the assembly is subjected to a hot stamping.
  • An electric heating assembly is also provided, assembled according to the method described above, comprising at least one diffusing plate made of metallic material, and at least one heating element disposed against said plate, characterized in that the assembly is held by a connection. intimate mechanics between the diffusing plate and the heating element (s).
  • this electric heating assembly is innumerable.
  • steam generators for ironing, cleaning, etc.
  • coffee makers for ironing, cleaning, etc.
  • kettles for steam cooking vessels
  • steam cooking vessels under pressure or not
  • all kinds of heated cooking vessels such as frying pans, casseroles, wok, fryers, hobs, hobs of particular shapes
  • meat grills waffle irons
  • pancake makers for ovens
  • radiant panels for heating electric, the soles of iron, and in general, any device comprising a crimped or overmolded heating element, etc.
  • Figure 1 shows a sectional view of an example of an electric heating assembly according to the invention, after assembly by hot stamping;
  • Figure 1 ' shows the same example further comprising a cover plate.
  • Figure 2 shows a similar assembly and the dies of the press before final assembly by hot stamping; Figure 2 'shows the same assembly further comprising a cover plate.
  • FIG. 3 illustrates a radiant panel produced using an electric heating assembly according to the invention, the heating element is in the form of a coil; Figure 3 'shows the same panel further comprising a cover plate.
  • Figure 4 illustrates an iron soleplate produced using an electric heating assembly according to the invention
  • Figures 5a and 5b illustrate an electric heating assembly according to the invention before assembly by hot stamping, where at least one groove whose shape advantageously corresponds to the profile of the heating element: in Figure 5a, is not preformed in the diffusing plate; in Figure 5b, is preformed in at least a portion of the diffusing plate.
  • Figures 5a ', 5b', 5c ' illustrate an electric heating assembly according to the invention, with cover plate, before assembly by hot stamping, where at least one groove whose shape advantageously corresponds to the profile of the heating element : in Figure 5a ', is not preformed in the plates of the assembly; in Figure 5b ', is preformed in at least a portion of the diffusing plate; in Figure 5c ', is preformed in at least a portion of the cover plate.
  • the electric heating assembly comprises a diffusing plate 1, preferably made using a metallic material having good malleability when heated to moderate temperature. It may, for example, be a plate made of aluminum or copper alloy, the shape of which can vary according to a very wide range of possibilities depending on the intended use of the assembly.
  • One (or more) heating element 4 is arranged against the diffusing plate 1 (the singular used in the rest of the present application for reasons of simplification actually designates one or the other possibility). It is preferably an armored heating element of known type.
  • the radial section of the heating element can be substantially circular, triangular or the like.
  • the path followed by the heating element in the plan varies according to the modes of execution. It can be a circular path, a serpentine path, an oval shape or whatever. It is also possible to provide several heating elements, arranged for example side by side or in concentric circles.
  • non-preformed plates are used.
  • the impact then has the effect of causing a partial movement of the material around the heating element and / or causing the heating element to penetrate at least partially into the diffusing plate.
  • diffusing plates can be used in which at least one groove whose shape advantageously corresponds to the profile of the heating element:
  • one or more grooves 3 are then preformed in the plate or plates in question, so as to form a housing in which rests at least a portion of the radial section of the corresponding heating element.
  • the path of the groove is advantageously similar to that of the corresponding heating element.
  • the striking dies 10 are advantageously shaped as a function of the desired final contour of the assembly. It is therefore advantageous to preform the grooves in the diffusing plate as a function of the desired final contour. Under the effect of striking, the material of the diffusing plate fills the portion of the groove initially left free by the heating element, so as to at least partially surround the latter.
  • the striking tool is advantageously shaped with a groove whose shape advantageously corresponds to the profile of the heating element .
  • the grooves 3 or 3 are shaped and arranged so as to minimize the deformations undergone by the casing 5 (fig. 1 and 1 ') of the heating element 4 so that these deformations remain within acceptable limits, in particular in order to avoid any short circuit between the casing 5 and the core 6 of the heating element 4.
  • the diffusing plate 1 plays in particular a role of conduction and distribution of the thermal energy. In this way, thanks to a larger transmission surface, unfavorable local overheating zones are avoided. For this reason, it is advantageous to use a material having good thermal conductivity characteristics.
  • the diffusing plate can fulfill a multiplicity of other functions.
  • it may be a substantially flat plate serving for example as a support on which an object intended to be heated is deposited, such as for example a cooking container. It can also be the bottom of a container. In this case, the outline of the plate can be shaped so as to serve as walls for the container.
  • the plate can also be juxtaposed with another element, itself serving as the bottom of a container.
  • This variant makes it possible to adapt with great ease the heating assembly according to the invention to a multiplicity of elements, in particular with the aim of obtaining optimal heating characteristics.
  • the diffusing plate makes it possible in particular to transmit the thermal energy generated by the heating element from the latter to the free surface 9 of the diffusing plate 1.
  • the electric heating assembly can also be configured according to other types of applications, to serve for example as a heating panel.
  • the diffusing plate 1 is then advantageously configured so as to optimize the heat transmission surface, for example with a profile having a series of fins, as illustrated in FIG. 3.
  • the electric heating assembly is configured so as to form the body of an iron soleplate.
  • the conductive material for example an aluminum alloy, is advantageously placed against an attached plate 20, for example made of stainless steel.
  • a sole plate of known type the sliding properties and resistance to wear of which are advantageous.
  • fix the plate 20 after striking for example by gluing, riveting or screwing.
  • the ends 7 (fig. 1) of the heating element can be folded in a direction opposite to the plate 1 and thus move away from the assembly.
  • the tips thus arranged can be used for a standard type connection.
  • the end pieces 7 can also extend into the plane of the assembly to exit from the side thereof.
  • the striking dies are then provided with clearances to avoid any damage that could be caused to said tips.
  • FIG. 2 illustrates the process used for assembling the various constituent elements of the electric heating assembly according to the invention.
  • an assembly consisting of a plate 1 and at least one heating element 4, the plate comprising or not including one or more preformed grooves 3.
  • the hot stamping is then carried out.
  • This hot stamping is advantageously carried out at a temperature allowing optimal creep of the material constituting the diffusing plate 1.
  • this temperature is between 400 * C and 500 * C and preferably around 455 * C .
  • the assembly of the various elements by hot stamping allows the assembly to be maintained by an intimate mechanical connection between the diffusing plate 1 and the adjoining portion of the heating elements 4.
  • FIG. 1 illustrates the result obtained with a heating element of substantially triangular section.
  • the material of the plate 1 after creep, partially surrounds the edges of the heating element.
  • FIG. 4 illustrates the result obtained with a heating element of substantially circular section arranged against a plate forming an iron soleplate.
  • Hot stamping therefore provides a multiple effect: strong cohesion between the heating element 4 and the adjacent portion of the diffusing plate 1, in particular the portion of the groove 3 filled by creep of the material of the diffusing plate.
  • the resulting electric heating assembly therefore has very high cohesion. It is also strong, stable and durable.
  • the simplicity and speed of the hot stamping process make it possible to obtain a wide range of different embodiments, at a very advantageous cost.
  • the hot stamping process also lends itself well to automation.
  • a second advantageous embodiment of the invention is illustrated in Figures 1 'to 5'.
  • the elements corresponding to those of Figures 1 to 5 bear the same reference numerals.
  • a cover plate 2 is arranged against the first plate, so as to cover the heating element. It is a plate made of a harder alloy than that of the diffusing plate 1, so as to promote the creep of the plate 1 during assembly, as described below.
  • a metal plate 2 advantageously made of steel, is used.
  • the cover plate advantageously occupies the entire surface covered by the diffusing plate. It can extend more or less over the sides, as shown in Figure 1 ', so as to allow the formation of an edge 11 for example. It can also cover a smaller area and / or have openings or clearances where the plate 1 is free. This then gives only a partial covering of the plate 1.
  • diffusing and covering plates in which at least one groove whose shape advantageously corresponds to the profile of the heating element:
  • one or more grooves 3 are then preformed in the plate or plates in question, so as to form a housing in which rests at least a portion of the radial section of the corresponding heating element.
  • the path of the groove is advantageously similar to that of the corresponding heating element. If a rather rigid cover plate of substantial thickness is used, the preformed grooves have the advantage of protecting the heating element placed in this groove during striking.
  • the striking dies 10 are advantageously shaped as a function of the desired final contour of the cover plate and of the whole assembly. It is therefore advantageous to preform the grooves 3 'in the image of the desired final contour.
  • the heating element benefits from a protection minimizing the deformations which it could undergo during striking, since the cover plate is for all practical purposes not deformed during striking.
  • non-preformed plates are used. It is then advantageous to use a thinner and / or more flexible cover plate, so as to allow this plate to follow the outline of the heating element and / or that provided on the striking die, avoiding deterioration. the heating element when typing.
  • the striking tool 10 is advantageously shaped with a groove 3' whose shape advantageously corresponds to the profile of the heating element.
  • the groove is provided in the diffusing plate.
  • the grooves 3 or 3 ′ are shaped and arranged so as to minimize the deformations undergone by the casing 5 of the heating element 4 so that these deformations remain within acceptable limits, in particular in order to avoid any short circuit between the casing 5 and the core 6 of the heating element 4.
  • the material of the diffusing plate fills the portion of the groove initially left free by the heating element, so as to at least partially surround the latter.
  • the diffusing plate 1 plays in particular a role of conduction and distribution of the thermal energy. In this way, thanks to a larger transmission surface, unfavorable local overheating zones are avoided. For this reason, a material advantageously having good thermal conductivity characteristics is used. Given the holding effect provided by the addition of at least one attached plate, it is possible to produce a heating assembly comprising several diffusing plates 1 juxtaposed to one another. The plates are then preferably arranged in close proximity to one another, or even so as to be in contact with one another. 13
  • the electric heating assembly is configured so as to form the body of an iron soleplate.
  • the conductive material for example an aluminum alloy, is advantageously disposed between two cover plates 2 and 20, for example of stainless steel.
  • Plate 2 plays a role similar to that described above.
  • the ends 7 of the heating element can be folded in a direction opposite to the plate 1 and exit from the assembly by holes or grooves specially provided for this purpose in the cover plate.
  • the tips thus arranged can be used for a standard type connection.
  • the end pieces 7 can also extend in the plane of the assembly to exit from the side thereof.
  • the striking dies are provided with clearances to avoid any damage that could be caused to said tips.
  • sensors in particular temperature sensors, making it possible to ensure regulation and / or safety of the heating assembly.
  • sensors of known type, can be inserted between the plates 1 and 2, for example near the heating element.
  • FIG. 2 ′ illustrates the process used for assembling the various constituent elements of the electric heating assembly according to the invention.
  • a set of plates 1 and 2 and at least one heating element 4 are used, the plates optionally comprising one or more preformed grooves 3.
  • the hot stamping is then carried out.
  • This hot stamping is advantageously carried out at a temperature allowing optimal creep of the material constituting the diffusing plate 1.
  • this temperature is between 400 ° C. and 500 ° C. and preferably around 455 ° C. .
  • the minimum pressure exerted during striking is advantageously around 250 N / mm 2 and the striking speed is generally at least 0.30 m / s.
  • the assembly of the various elements by hot stamping allows the assembly to be maintained by an intimate mechanical connection between on the one hand the diffusing plate 1 and the cover plate 2 and on the other hand between the adjoining portion of the plate 1 and the heating element (s) 4.
  • Figure 1 Illustrates the result obtained with a heating element of substantially triangular section. In this case, the material which has partially interfered in the groove partially surrounds the edges of the heating element.
  • Figure 4 Illustrates the result obtained with a heating element of substantially circular section arranged between a set of plates so as to form an iron soleplate.
  • Hot stamping therefore provides a multiple effect: a little, strong cohesion between the diffusing plates 1 and the covering plates 2 and / or 20 added; on the other hand, strong cohesion between the heating element 4 and the adjacent portion of the diffusing plate 1, in particular the portion of the groove 3 filled by creep of the material of the diffusing plate.
  • This cohesive force also provides an additional clamping retention effect of the heating element 4 fixedly maintained between the portion of the covering plate 2 partially surrounding it and the adjacent portion of the diffusing plate 1.
  • the heating assembly resulting electric therefore has a very high cohesion. It is also strong, stable and durable.
  • the simplicity and speed of the hot stamping process make it possible to obtain a wide range of different embodiments, at a very advantageous cost.
  • the hot stamping process also lends itself well to automation.
  • the assembly process and the electrical heating assembly according to the invention therefore make it possible, for example, to obtain a heating base or a thermal diffuser which can be regulated according to several heating stages, offering a high thermal efficiency as well as a heat distribution. optimal and able to support significant powers without decohesion of the assembly in the long term.
  • the shapes and dimensions of the heating assembly can vary depending on the entire range of corresponding applications.
  • the invention finds its application in the production of electric heating assemblies.

Landscapes

  • Surface Heating Bodies (AREA)
  • Resistance Heating (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

A method for assembling an electrical heating assembly including at least one diffusing plate (1) and at least one heating element (4) arranged in contact therewith. The heating elements (4) are arranged in contact with the diffusing plate (1) and the assembly is subjected to hot heading. The resulting electrical heating assembly produced according to the method is also disclosed.

Description

ELEMENT CHAUFFANT AVEC PLAQUE DIFFUSANTE ET PROCEDE D'ASSEMBLAGE DUDIT ENSEMBLE HEATING ELEMENT WITH DIFFUSING PLATE AND METHOD FOR ASSEMBLING THE SAME
DOMAINE TECHNIQUETECHNICAL AREA
La présente invention concerne le domaine des ensembles chauffants électriques en général et s'applique plus particulièrement aux ensembles chauffants électriques comprenant au moins une plaque diffusante et au moins un élément chauffant fixé contre ladite plaque. Selon une variante avantageuse de l'invention, une plaque de recouvrement est également prévue.The present invention relates to the field of electric heating assemblies in general and applies more particularly to electric heating assemblies comprising at least one diffusing plate and at least one heating element fixed against said plate. According to an advantageous variant of the invention, a cover plate is also provided.
Elle concerne par ailleurs le procédé d'assemblage d'un tel ensemble chauffant électrique.It also relates to the method of assembling such an electric heating assembly.
TECHNIQUE ANTERIEUREPRIOR ART
Des ensembles chauffants électriques avec plaques diffusantes sont déjà connus. L'un des inconvénients de ces ensembles réside dans la complexité du mode d'assemblage dés différents éléments constituants. En effet, dans la plupart des cas, les éléments chauffants sont fixés à un autre élément tel un support, par exemple par soudure. La réalisation d'une telle soudure nécessite un outillage sophistiqué et implique un mode opératoire long et coûteux. Cette opération affecte grandement l'aspect esthétique des éléments joints, et, est la source de nombreux problèmes de qualité.Electric heating assemblies with diffusing plates are already known. One of the drawbacks of these assemblies lies in the complexity of the method of assembling the various constituent elements. In fact, in most cases, the heating elements are fixed to another element such as a support, for example by welding. The production of such a weld requires sophisticated tools and involves a long and costly operating mode. This operation greatly affects the aesthetic appearance of the attached elements, and is the source of many quality problems.
On connaît également des éléments chauffants qui sont fixés par sertissage, collage, ou au moyen de fixations rivetées, vissées, soudées, etc. Dans de tels cas, l'assemblage résultant présente souvent certaines faiblesses au niveau de la cohésion entre les éléments pouvant affecter considérablement la durabilite du produit. De plus, les nombreuses pièces nécessaires à l'assemblage compliquent souvent celui-ci et le rendent coûteux. EXPOSE DE L'INVENTIONHeating elements are also known which are fixed by crimping, gluing, or by means of riveted, screwed, welded, etc. fasteners. In such cases, the resulting assembly often has certain weaknesses in terms of cohesion between the elements which can considerably affect the durability of the product. In addition, the many parts required for assembly often complicate it and make it expensive. STATEMENT OF THE INVENTION
L'invention a précisément pour but de remédier aux inconvénients et/ou aux limitations précités, et propose un procédé permettant de réaliser un ensemble chauffant électrique comprenant au moins une plaque diffusante et au moins un élément chauffant fixé contre ladite plaque, ledit ensemble étant réalisé par frappe à chaud. L'invention propose également l'ensemble chauffant électrique assemblé par frappe à chaud résultant.The invention specifically aims to remedy the aforementioned drawbacks and / or limitations, and proposes a method for producing an electric heating assembly comprising at least one diffusing plate and at least one heating element fixed against said plate, said assembly being produced by hot stamping. The invention also provides the electric heating assembly assembled by hot stamping resulting.
Selon les formes d'exécution de l'invention, on peut utiliser des plaques diffusantes dans lesquelles le profil de l'élément chauffant :According to the embodiments of the invention, diffusing plates can be used in which the profile of the heating element:
- n'est pas préformé ou - est préformé dans au moins une portion de la plaque diffusante et/ou, selon une forme avantageuse de l'invention,- is not preformed or - is preformed in at least a portion of the diffusing plate and / or, according to an advantageous form of the invention,
- est préformé dans au moins une portion de la plaque de recouvrement.- is preformed in at least a portion of the cover plate.
Dans ces deux derniers cas, on préforme alors une gorge dans la ou les plaques en question. Le cheminement de la gorge est avantageusement similaire à celui de l'élément chauffant correspondant. Sous l'effet de la frappe, le matériau de la plaque diffusante s'immisce au moins partiellement autour des éléments chauffants par fluage de ce matériau. Dans les cas particuliers où une gorge est préformée, le matériau de la plaque diffusante remplit la portion de la gorge laissée initialement libre par l'élément chauffant, de façon à entourer au moins partiellement celui-ci. On obtient de la sorte une fixation résistante et durable.In the latter two cases, a groove is then preformed in the plate or plates in question. The path of the groove is advantageously similar to that of the corresponding heating element. Under the effect of striking, the material of the diffusing plate at least partially interferes around the heating elements by creep of this material. In particular cases where a groove is preformed, the material of the diffusing plate fills the portion of the groove initially left free by the heating element, so as to at least partially surround the latter. In this way, a resistant and durable fixing is obtained.
Par ailleurs, tel que décrit ultérieurement, l'outil de frappe est avantageusement conformé en fonction du profil de l'élément chauffant, notamment dans le but de minimiser les contraintes subies par ce dernier lors de la frappe. Un autre but de l'invention est de proposer un ensemble chauffant électrique qui soit parfaitement étanche.Furthermore, as described later, the striking tool is advantageously shaped as a function of the profile of the heating element, in particular with the aim of minimizing the stresses suffered by the latter during striking. Another object of the invention is to propose an electric heating assembly which is perfectly sealed.
Afin d'atteindre ces buts, il est prévu un procédé d'assemblage d'un ensemble chauffant électrique comprenant au moins une plaque diffusante et au moins un élément chauffant disposé contre la plaque diffusante, comprenant les étapes suivantes:In order to achieve these goals, there is provided a method of assembling an electric heating assembly comprising at least one diffusing plate and at least one heating element disposed against the diffusing plate, comprising the following steps:
-les éléments chauffants sont disposés contre la plaque diffusante, -l'ensemble est soumis à une frappe à chaud.-the heating elements are arranged against the diffusing plate, -the assembly is subjected to a hot stamping.
Il est également prévu un ensemble chauffant électrique assemblé suivant le procédé décrit ci-haut, comprenant au moins une plaque diffusante en matériau métallique, et au moins un élément chauffant disposé contre ladite plaque, caractérisé en ce que l'ensemble est maintenu par une liaison mécanique intime entre la plaque diffusante et le ou les éléments chauffants.An electric heating assembly is also provided, assembled according to the method described above, comprising at least one diffusing plate made of metallic material, and at least one heating element disposed against said plate, characterized in that the assembly is held by a connection. intimate mechanics between the diffusing plate and the heating element (s).
Les applications de cet ensemble chauffant électrique sont innombrables. Par exemple, dans le domaine des appareils électroménagers, il peut être utilisé notamment avec les générateurs de' vapeur (pour repassage, nettoyage, etc), les cafetières, bouilloires, les récipients de cuisson à vapeur (sous pression ou non) tels les autocuiseurs, ainsi que tous genres de récipients de cuisson chauffants tels poêles, casseroles, wok, les friteuses, les plaques de cuisson, les plans de cuisson de formes particulières tels les grille-viandes, gaufriers, crêpiers, les fours, les panneaux radiants pour chauffage électrique, les semelles de fer à repasser, et de manière générale, tout dispositif comprenant un élément chauffant serti ou surmoulé, etc.The applications of this electric heating assembly are innumerable. For example, in the field of household appliances, it can be used in particular with steam generators (for ironing, cleaning, etc.), coffee makers, kettles, steam cooking vessels (under pressure or not) such as pressure cookers , as well as all kinds of heated cooking vessels such as frying pans, casseroles, wok, fryers, hobs, hobs of particular shapes such as meat grills, waffle irons, pancake makers, ovens, radiant panels for heating electric, the soles of iron, and in general, any device comprising a crimped or overmolded heating element, etc.
DESCRIPTION SOMMAIRE DES DESSINSSUMMARY DESCRIPTION OF THE DRAWINGS
D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lumière de la description et des dessins qui suivent, illustrant, à titre d'exemples non limitatifs, des modes de mise en oeuvre de l'invention. Ainsi, référence est faite aux figures 1 à 5, où:Other characteristics and advantages of the invention will appear more clearly in the light of the description and the drawings which follow, illustrating, by way of nonlimiting examples, embodiments of the invention. Thus, reference is made to Figures 1 to 5, where:
- la figure 1 représente une vue en coupe d'un exemple d'un ensemble chauffant électrique selon l'invention, après assemblage par frappe à chaud; la figure 1 ' représente le même exemple comprenant en plus une plaque de recouvrement.- Figure 1 shows a sectional view of an example of an electric heating assembly according to the invention, after assembly by hot stamping; Figure 1 'shows the same example further comprising a cover plate.
- la figure 2 représente un ensemble similaire ainsi que les matrices de la presse avant assemblage final par frappe à chaud; la figure 2' représente le même ensemble comprenant en plus une plaque de recouvrement.- Figure 2 shows a similar assembly and the dies of the press before final assembly by hot stamping; Figure 2 'shows the same assembly further comprising a cover plate.
- la figure 3 illustre un panneau radiant réalisé à l'aide d'un ensemble chauffant électrique selon l'invention dont l'élément chauffant est en forme de serpentin; la figure 3' représente le même panneau comprenant en plus une plaque de recouvrement.- Figure 3 illustrates a radiant panel produced using an electric heating assembly according to the invention, the heating element is in the form of a coil; Figure 3 'shows the same panel further comprising a cover plate.
- la figure 4 illustre une semelle de fer à repasser réalisée à l'aide d'un ensemble chauffant électrique selon l'invention; la figure 4' illustre la même semelle, comprenant en plus une plaque de recouvrement.- Figure 4 illustrates an iron soleplate produced using an electric heating assembly according to the invention; Figure 4 'illustrates the same sole, further comprising a cover plate.
- les figures 5a et 5b illustrent un ensemble chauffant électrique selon l'invention avant assemblage par frappe à chaud, où au moins une gorge dont la forme correspond avantageusement au profil de l'élément chauffant: à la figure 5a, n'est pas préformée dans la plaque diffusante; à la figure 5b, est préformée dans au moins une portion de la plaque diffusante.- Figures 5a and 5b illustrate an electric heating assembly according to the invention before assembly by hot stamping, where at least one groove whose shape advantageously corresponds to the profile of the heating element: in Figure 5a, is not preformed in the diffusing plate; in Figure 5b, is preformed in at least a portion of the diffusing plate.
- les figures 5a', 5b', 5c' illustrent un ensemble chauffant électrique selon l'invention, avec plaque de recouvrement, avant assemblage par frappe à chaud, où au moins une gorge dont la forme correspond avantageusement au profil de l'élément chauffant : à la figure 5a', n'est pas préformée dans les plaques de l'ensemble; à la figure 5b', est préformée dans au moins une portion de la plaque diffusante; à la figure 5c', est préformée dans au moins une portion de la plaque de recouvrement.- Figures 5a ', 5b', 5c 'illustrate an electric heating assembly according to the invention, with cover plate, before assembly by hot stamping, where at least one groove whose shape advantageously corresponds to the profile of the heating element : in Figure 5a ', is not preformed in the plates of the assembly; in Figure 5b ', is preformed in at least a portion of the diffusing plate; in Figure 5c ', is preformed in at least a portion of the cover plate.
MEILLEURE MANIERE DE REALISER L'INVENTIONBEST WAY TO IMPLEMENT THE INVENTION
En faisant référence à la figure 1, l'ensemble chauffant électrique selon l'invention comprend une plaque diffusante 1 , réalisée de préférence à l'aide d'un matériau métallique possédant une bonne malléabilité lorsqu'on le chauffe à température modérée. Il peut s'agir par exemple d'une plaque en alliage d'aluminium ou de cuivre dont la forme peut varier selon un très vaste éventail de possibilités en fonction de l'utilisation prévue pour l'ensemble.Referring to Figure 1, the electric heating assembly according to the invention comprises a diffusing plate 1, preferably made using a metallic material having good malleability when heated to moderate temperature. It may, for example, be a plate made of aluminum or copper alloy, the shape of which can vary according to a very wide range of possibilities depending on the intended use of the assembly.
Un (ou plusieurs) élément chauffant 4 est disposé contre la plaque diffusante 1 (le singulier utilisé dans le reste de la présente demande pour des raisons de simplification désigne en fait l'une ou l'autre possibilité). Il s'agit de préférence d'un élément chauffant blindé de type connu. La section radiale de l'élément chauffant peut être sensiblement circulaire, triangulaire ou autre. Le cheminement suivi par l'élément chauffant dans le plan varie selon les modes d'exécution. Il peut s'agir d'un cheminement circulaire, d'un cheminement en forme de serpentin, de forme ovale ou quelconque. Il est également possible de prévoir plusieurs éléments chauffants, disposés par exemple côte à côte ou encore en cercles concentriques.One (or more) heating element 4 is arranged against the diffusing plate 1 (the singular used in the rest of the present application for reasons of simplification actually designates one or the other possibility). It is preferably an armored heating element of known type. The radial section of the heating element can be substantially circular, triangular or the like. The path followed by the heating element in the plan varies according to the modes of execution. It can be a circular path, a serpentine path, an oval shape or whatever. It is also possible to provide several heating elements, arranged for example side by side or in concentric circles.
Selon une forme d'exécution avantageuse de l'invention, on utilise des plaques non préformées. La frappe a alors pour effet de provoquer un mouvement partiel de la matière autour de l'élément chauffant et/ou de faire pénétrer au moins partiellement l'élément chauffant dans la plaque diffusante. Selon une forme d'exécution avantageuse de l'invention, on peut utiliser des plaques diffusantes dans lesquelles au moins une gorge dont la forme correspond avantageusement au profil de l'élément chauffant:According to an advantageous embodiment of the invention, non-preformed plates are used. The impact then has the effect of causing a partial movement of the material around the heating element and / or causing the heating element to penetrate at least partially into the diffusing plate. According to an advantageous embodiment of the invention, diffusing plates can be used in which at least one groove whose shape advantageously corresponds to the profile of the heating element:
- n'est pas préformée, tel qu'illustré à la figure 5a; ou- is not preformed, as illustrated in Figure 5a; or
- est préformée dans au moins une portion de la plaque diffusante tel qu'illustré à la figure 5b;- Is preformed in at least a portion of the diffusing plate as illustrated in Figure 5b;
Dans ce dernier cas, on préforme alors une ou plusieurs gorges 3 dans la ou les plaques en question, de façon à former un logement dans lequel repose au moins une portion de la section radiale de l'élément chauffant correspondant. Le cheminement de la gorge est avantageusement similaire à celui de l'élément chauffant correspondant.In the latter case, one or more grooves 3 are then preformed in the plate or plates in question, so as to form a housing in which rests at least a portion of the radial section of the corresponding heating element. The path of the groove is advantageously similar to that of the corresponding heating element.
Les matrices de frappe 10 sont avantageusement conformées en fonction du contour final souhaité de l'ensemble. Il est donc avantageux de préformer les gorges dans la plaque diffusante en fonction du contour final souhaité. Sous l'effet de la frappe, le matériau de la plaque diffusante remplit la portion de la gorge laissée initialement libre par l'élément chauffant, de façon à entourer au moins partiellement celui-ci.The striking dies 10 are advantageously shaped as a function of the desired final contour of the assembly. It is therefore advantageous to preform the grooves in the diffusing plate as a function of the desired final contour. Under the effect of striking, the material of the diffusing plate fills the portion of the groove initially left free by the heating element, so as to at least partially surround the latter.
Ainsi, en particulier dans le cas de la figure 5a, où aucune gorge n'est préformée dans les plaques de l'ensemble, l'outil de frappe est avantageusement conformé avec une gorge dont la forme correspond avantageusement au profil de l'élément chauffant.Thus, in particular in the case of FIG. 5a, where no groove is preformed in the plates of the assembly, the striking tool is advantageously shaped with a groove whose shape advantageously corresponds to the profile of the heating element .
On peut évidemment combiner les diverses variantes afin de préformer les gorges à l'endroit le plus convenable, selon l'utilisation prévue de l'ensemble chauffant électrique résultant.The various variants can obviously be combined in order to preform the grooves in the most suitable place, depending on the intended use of the resulting electric heating assembly.
Les gorges 3 ou 3" sont conformées et disposées de façon à minimiser les déformations subies par l'enveloppe 5 (fig. 1 et 1 ') de l'élément chauffant 4 afin que ces déformations demeurent dans des limites acceptables, notamment dans le but d'éviter tout court-circuit entre l'enveloppe 5 et l'âme 6 de l'élément chauffant 4.The grooves 3 or 3 "are shaped and arranged so as to minimize the deformations undergone by the casing 5 (fig. 1 and 1 ') of the heating element 4 so that these deformations remain within acceptable limits, in particular in order to avoid any short circuit between the casing 5 and the core 6 of the heating element 4.
La plaque diffusante 1 joue notamment un rôle de conduction et répartition de l'énergie thermique. De cette façon, grâce à une plus grande surface de transmission, on évite les zones de surchauffe locale défavorables. Pour cette raison, on utilise avantageusement un matériau présentant de bonnes caractéristiques de conductibilité thermique.The diffusing plate 1 plays in particular a role of conduction and distribution of the thermal energy. In this way, thanks to a larger transmission surface, unfavorable local overheating zones are avoided. For this reason, it is advantageous to use a material having good thermal conductivity characteristics.
Selon l'utilisation prévue de l'ensemble thermique chauffant, la plaque diffusante peut remplir une multiplicité d'autres fonctions. Ainsi, il peut s'agir d'une plaque sensiblement plane servant par exemple de support sur lequel on dépose un objet destiné à être chauffé, comme par exemple un récipient de cuisson. Il peut également s'agir du fond d'un récipient. Dans ce cas, le contour de la plaque peut être conformé de façon à servir de parois pour le récipient.Depending on the intended use of the heating thermal assembly, the diffusing plate can fulfill a multiplicity of other functions. Thus, it may be a substantially flat plate serving for example as a support on which an object intended to be heated is deposited, such as for example a cooking container. It can also be the bottom of a container. In this case, the outline of the plate can be shaped so as to serve as walls for the container.
Autrement, plutôt que de servir directement de fond d'un récipient comme dans le cas précédent, la plaque peut également être juxtaposée à un autre élément, servant lui-même de fond d'un récipient. Cette variante permet d'adapter avec une grande aisance l'ensemble chauffant selon l'invention à une multiplicité d'éléments, notamment dans le but d'obtenir des caractéristiques de chauffe optimales.Otherwise, rather than serving directly as the bottom of a container as in the previous case, the plate can also be juxtaposed with another element, itself serving as the bottom of a container. This variant makes it possible to adapt with great ease the heating assembly according to the invention to a multiplicity of elements, in particular with the aim of obtaining optimal heating characteristics.
Dans tous ces exemples, la plaque diffusante permet en particulier de transmettre l'énergie thermique générée par l'élément chauffant depuis celui-ci vers la surface libre 9 de la plaque diffusante 1.In all these examples, the diffusing plate makes it possible in particular to transmit the thermal energy generated by the heating element from the latter to the free surface 9 of the diffusing plate 1.
L'ensemble chauffant électrique peut également être configuré en fonction d'autres types d'applications, pour servir par exemple de panneau chauffant.The electric heating assembly can also be configured according to other types of applications, to serve for example as a heating panel.
Dans un tel cas, il est avantageux d'isoler la face externe de la plaque 2 et de prévoir un moyen de support permettant de disposer verticalement l'ensemble. La face libre 9 de la plaque diffusante 1 est alors avantageusement configurée de façon à optimiser la surface de transmission de chaleur, par exemple avec un profil présentant une série d'ailettes, comme illustré à la figure 3.In such a case, it is advantageous to isolate the external face of the plate 2 and to provide a support means making it possible to arrange the assembly vertically. The free face 9 of the diffusing plate 1 is then advantageously configured so as to optimize the heat transmission surface, for example with a profile having a series of fins, as illustrated in FIG. 3.
Une fois la frappe effectuée, on souhaitera souvent protéger et/ou isoler la face libre de l'élément chauffant, notamment pour des raisons de sécurité. Il est alors avantageux de disposer un élément rapporté de façon à recouvrir cette face libre.Once the strike has been made, it will often be desired to protect and / or isolate the free face of the heating element, in particular for safety reasons. It is then advantageous to have an added element so as to cover this free face.
Par ailleurs, selon une autre forme d'exécution illustrée à la figure 4, l'ensemble chauffant électrique est configuré de façon à former le corps d'une semelle de fer à repasser. Selon ce mode d'exécution, le matériau conducteur, par exemple un alliage d'aluminium, est avantageusement disposé contre une plaque rapportée 20 par exemple en acier inoxydable. La plaque 20, disposée contre la face libre 12 de la plaque diffusante et frappée simultanément avec les autres éléments de l'ensemble, sert de semelle. Pour cette raison, on utilise de préférence une plaque de semelle de type connu dont les propriétés de glisse et de résistance à l'usure sont avantageuses. Il est également possible de fixer la plaque 20 après la frappe, par exemple par collage, rivetage ou vissage.Furthermore, according to another embodiment illustrated in FIG. 4, the electric heating assembly is configured so as to form the body of an iron soleplate. According to this embodiment, the conductive material, for example an aluminum alloy, is advantageously placed against an attached plate 20, for example made of stainless steel. The plate 20, disposed against the free face 12 of the diffusing plate and struck simultaneously with the other elements of the assembly, serves as a sole. For this reason, it is preferable to use a sole plate of known type, the sliding properties and resistance to wear of which are advantageous. It is also possible to fix the plate 20 after striking, for example by gluing, riveting or screwing.
Les embouts 7 (fig. 1) de l'élément chauffant peuvent être repliés suivant une direction opposée à la plaque 1 et ainsi s'éloigner de l'ensemble. Les embouts ainsi disposés peuvent être utilisés pour un branchement de type standard. Les embouts 7 peuvent également se prolonger dans le pian de l'ensemble pour sortir par le côté de celui-ci. Les matrices de frappe sont alors prévues avec des dégagements pour éviter tout dommage qui pourrait être causé auxdits embouts.The ends 7 (fig. 1) of the heating element can be folded in a direction opposite to the plate 1 and thus move away from the assembly. The tips thus arranged can be used for a standard type connection. The end pieces 7 can also extend into the plane of the assembly to exit from the side thereof. The striking dies are then provided with clearances to avoid any damage that could be caused to said tips.
Par ailleurs, selon diverses variantes, il est prévu d'insérer des capteurs, notamment des capteurs de température, permettant d'assurer la régulation et/ou la sécurité de l'ensemble chauffant. Ces capteurs, de type connu, peuvent être insérés entre les plaques 1 et 2, par exemple à proximité de l'élément chauffant. La figure 2 illustre le procédé utilisé pour l'assemblage des différents éléments constituants de l'ensemble chauffant électrique selon l'invention.Furthermore, according to various variants, provision is made for inserting sensors, in particular temperature sensors, making it possible to ensure regulation and / or safety of the heating assembly. These sensors, of known type, can be inserted between the plates 1 and 2, for example near the heating element. FIG. 2 illustrates the process used for assembling the various constituent elements of the electric heating assembly according to the invention.
Tel que déjà décrit, on utilise un ensemble constitué d'une plaque 1 et au moins un élément chauffant 4, la plaque comprenant ou non une ou plusieurs gorges 3 préformées.As already described, an assembly is used consisting of a plate 1 and at least one heating element 4, the plate comprising or not including one or more preformed grooves 3.
Selon une variante d'exécution avantageuse, il est prévu de prépositionner ou de préassembler les éléments chauffants contre la plaque par tout moyen approprié de type connu, comme par exemple par soudage 8 (fig. 2'), par collage, sertissage, etc. afin de faciliter la réalisation de la frappe.According to an advantageous alternative embodiment, provision is made to preposition or pre-assemble the heating elements against the plate by any suitable means of known type, such as for example by welding 8 (fig. 2 '), by bonding, crimping, etc. to facilitate the completion of the strike.
Il peut s'avérer avantageux d'utiliser un lubrifiant approprié de type connu afin d'éviter tout problème d'adhérence de l'un ou l'autre des éléments de l'ensemble contre les outils de frappe.It may be advantageous to use an appropriate lubricant of known type in order to avoid any problem of adhesion of one or the other of the elements of the assembly against the striking tools.
On effectue ensuite la frappe à chaud.The hot stamping is then carried out.
Cette frappe à chaud est avantageusement réalisée à une température permettant un fluage optimal du matériau constituant la plaque diffusante 1. Pour l'aluminium et ses alliages, cette température se situe entre 400*C et 500*C et de préférence autour de 455* C.This hot stamping is advantageously carried out at a temperature allowing optimal creep of the material constituting the diffusing plate 1. For aluminum and its alloys, this temperature is between 400 * C and 500 * C and preferably around 455 * C .
L'assemblage des différents éléments par frappe à chaud permet que l'ensemble soit maintenu par une liaison mécanique intime entre la plaque diffusante 1 et la portion attenante des éléments chauffants 4.The assembly of the various elements by hot stamping allows the assembly to be maintained by an intimate mechanical connection between the diffusing plate 1 and the adjoining portion of the heating elements 4.
Tel qu'illustré à la figure 1, sous l'effet de la frappe, le matériau de la plaque diffusante s'immisce au moins partiellement autour de l'élément chauffant par fluage de ce matériau. La figure 1 illustre le résultat obtenu avec un élément chauffant de section sensiblement triangulaire. Dans ce cas, le matériau de la plaque 1 , après fluage, entoure partiellement les rebords de l'élément chauffant. La figure 4 illustre quant à elle le résultat obtenu avec un élément chauffant de section sensiblement circulaire agencé contre une plaque formant une semelle de fer à repasser.As illustrated in FIG. 1, under the effect of striking, the material of the diffusing plate at least partially interferes around the heating element by creep of this material. Figure 1 illustrates the result obtained with a heating element of substantially triangular section. In this case, the material of the plate 1, after creep, partially surrounds the edges of the heating element. FIG. 4 illustrates the result obtained with a heating element of substantially circular section arranged against a plate forming an iron soleplate.
La frappe à chaud procure donc un effet multiple: une forte cohésion entre l'élément chauffant 4 et la portion adjacente de la plaque diffusante 1 , notamment la portion de la gorge 3 remplie par fluage du matériau de la plaque diffusante. L'ensemble chauffant électrique résultant présente donc une très grande cohésion. Il est également résistant, stable et durable. Par ailleurs, la simplicité et la rapidité du procédé de frappe à chaud permettent d'obtenir une vaste gamme de formes d'exécution différentes, à un coût très avantageux. Le procédé de frappe à chaud se prête par ailleurs bien à l'automatisation.Hot stamping therefore provides a multiple effect: strong cohesion between the heating element 4 and the adjacent portion of the diffusing plate 1, in particular the portion of the groove 3 filled by creep of the material of the diffusing plate. The resulting electric heating assembly therefore has very high cohesion. It is also strong, stable and durable. Furthermore, the simplicity and speed of the hot stamping process make it possible to obtain a wide range of different embodiments, at a very advantageous cost. The hot stamping process also lends itself well to automation.
Un deuxième mode de réalisation avantageux de l'invention, est illustré aux figures 1 ' à 5'. Dans ces figures, les éléments correspondant à ceux des figures 1 à 5 portent les mêmes références numériques. Une plaque de recouvrement 2 est disposée contre la première plaque, de façon à recouvrir l'élément chauffant. Il s'agit d'une plaque réalisée en un alliage plus dur que celui de la plaque diffusante 1 , de façon à favoriser le fluage de la plaque 1 lors de l'assemblage, tel que décrit ci-après. Ainsi, on utilise une plaque 2 métallique avantageusement en acier.A second advantageous embodiment of the invention is illustrated in Figures 1 'to 5'. In these figures, the elements corresponding to those of Figures 1 to 5 bear the same reference numerals. A cover plate 2 is arranged against the first plate, so as to cover the heating element. It is a plate made of a harder alloy than that of the diffusing plate 1, so as to promote the creep of the plate 1 during assembly, as described below. Thus, a metal plate 2, advantageously made of steel, is used.
La plaque de recouvrement occupe avantageusement toute la surface couverte par la plaque diffusante. Elle peut déborder plus ou moins sur les côtés, comme le montre la figure l', de façon à permettre la formation d'un bord 11 par exemple. Elle peut également couvrir une surface moins importante et/ou présenter des ouvertures ou dégagements où la plaque 1 est libre. On obtient alors un recouvrement uniquement partiel de la plaque 1. Selon divers modes de réalisation, il est également possible de prévoir plusieurs plaques de recouvrement 2 disposées du côté de l'élément chauffant et/ou même contre la face libre 9 de la plaque diffusante 1 tel que cela est décrit ultérieurement dans l'exemple d'une semelle de fer à repasser. Selon les multiples variantes de ce deuxième mode de réalisation de l'invention, on peut utiliser des plaques diffusantes et de recouvrement dans lesquelles au moins une gorge dont la forme correspond avantageusement au profil de l'élément chauffant:The cover plate advantageously occupies the entire surface covered by the diffusing plate. It can extend more or less over the sides, as shown in Figure 1 ', so as to allow the formation of an edge 11 for example. It can also cover a smaller area and / or have openings or clearances where the plate 1 is free. This then gives only a partial covering of the plate 1. According to various embodiments, it is also possible to provide several covering plates 2 arranged on the side of the heating element and / or even against the free face 9 of the diffusing plate. 1 as described later in the example of an iron soleplate. According to the multiple variants of this second embodiment of the invention, it is possible to use diffusing and covering plates in which at least one groove whose shape advantageously corresponds to the profile of the heating element:
- n'est pas préformée, tel qu'illustré à la figure 5a';- is not preformed, as illustrated in Figure 5a ';
- est préformée dans au moins une portion de la plaque diffusante tel qu'illustré à la figure 5b'; et/ou- Is preformed in at least a portion of the diffusing plate as illustrated in Figure 5b '; and or
- est préformée dans au moins une portion de la plaque de recouvrement, tel qu'illustré à la figure 5c';- Is preformed in at least a portion of the cover plate, as illustrated in Figure 5c ';
Dans les deux derniers cas, on préforme alors une ou plusieurs gorges 3 dans la ou les plaques en question, de façon à former un logement dans lequel repose au moins une portion de la section radiale de l'élément chauffant correspondant. Le cheminement de la gorge est avantageusement similaire à celui de l'élément chauffant correspondant. Si on utilise une plaque de recouvrement plutôt rigide et d'épaisseur importante, les gorges préformées présentent l'avantage de protéger l'élément chauffant disposé dans cette gorge lors de la frappe.In the latter two cases, one or more grooves 3 are then preformed in the plate or plates in question, so as to form a housing in which rests at least a portion of the radial section of the corresponding heating element. The path of the groove is advantageously similar to that of the corresponding heating element. If a rather rigid cover plate of substantial thickness is used, the preformed grooves have the advantage of protecting the heating element placed in this groove during striking.
Les matrices de frappe 10 sont avantageusement conformées en fonction du contour final souhaité de la plaque de recouvrement et de tout l'ensemble. Il est donc avantageux de préformer les gorges 3' à l'image du contour final souhaité. Dans ce cas, l'élément chauffant bénéficie d'une protection minimisant les déformations qu'il pourrait subir lors de la frappe, puisque la plaque de recouvrement n'est à toutes fins pratiques pas déformée lors de la frappe.The striking dies 10 are advantageously shaped as a function of the desired final contour of the cover plate and of the whole assembly. It is therefore advantageous to preform the grooves 3 'in the image of the desired final contour. In this case, the heating element benefits from a protection minimizing the deformations which it could undergo during striking, since the cover plate is for all practical purposes not deformed during striking.
Selon une variante du procédé, on utilise des plaques non préformées. Il est alors avantageux d'utiliser une plaque de recouvrement plus mince et/ou plus souple, de façon à permettre à cette plaque d'épouser le contour de l'élément chauffant et/ou celui prévu sur la matrice de frappe en évitant de détériorer l'élément chauffant lors de la frappe. Ainsi, en particulier dans le cas de la figure 5a', où aucune gorge n'est préformée dans les plaques de l'ensemble, l'outil de frappe 10 est avantageusement conformé avec une gorge 3' dont la forme correspond avantageusement au profil de l'élément chauffant.According to a variant of the method, non-preformed plates are used. It is then advantageous to use a thinner and / or more flexible cover plate, so as to allow this plate to follow the outline of the heating element and / or that provided on the striking die, avoiding deterioration. the heating element when typing. Thus, in particular in the case of FIG. 5a ', where no groove is preformed in the plates of the assembly, the striking tool 10 is advantageously shaped with a groove 3' whose shape advantageously corresponds to the profile of the heating element.
Selon une autre variante, la gorge est prévue dans la plaque diffusante.According to another variant, the groove is provided in the diffusing plate.
On peut évidemment combiner ces diverses variantes afin de préformer les gorges à l'endroit le plus convenable, selon l'utilisation prévue de l'ensemble chauffant électrique résultant.It is obviously possible to combine these various variants in order to preform the grooves in the most suitable place, according to the intended use of the resulting electric heating assembly.
Les gorges 3 ou 3' sont conformées et disposées de façon à minimiser les déformations subies par l'enveloppe 5 de l'élément chauffant 4 afin que ces déformations demeurent dans des limites acceptables, notamment dans le but d'éviter tout court-circuit entre l'enveloppe 5 et l'âme 6 de l'élément chauffant 4.The grooves 3 or 3 ′ are shaped and arranged so as to minimize the deformations undergone by the casing 5 of the heating element 4 so that these deformations remain within acceptable limits, in particular in order to avoid any short circuit between the casing 5 and the core 6 of the heating element 4.
Sous l'effet de la frappe, le matériau de la plaque diffusante remplit la portion de la gorge laissée initialement libre par l'élément chauffant, de façon à entourer au moins partiellement celui-ci.Under the effect of striking, the material of the diffusing plate fills the portion of the groove initially left free by the heating element, so as to at least partially surround the latter.
La plaque diffusante 1 joue notamment un rôle de conduction et répartition de l'énergie thermique. De cette façon, grâce à une plus grande surface de transmission, on évite les zones de surchauffe locale défavorables. Pour cette raison, on utilise avantageusement un matériau présentant de bonnes caractéristiques de conductibilité thermique. Etant donné l'effet de maintien procuré par l'ajout d'au moins une plaque rapportée, il est possible de réaliser un ensemble de chauffage comportant plusieurs plaques diffusantes 1 juxtaposées l'une à l'autre. Les plaques sont alors préférablement disposées à proximité immédiate l'une par rapport à l'autre, ou encore de façon à être en contact l'une avec l'autre. 13The diffusing plate 1 plays in particular a role of conduction and distribution of the thermal energy. In this way, thanks to a larger transmission surface, unfavorable local overheating zones are avoided. For this reason, a material advantageously having good thermal conductivity characteristics is used. Given the holding effect provided by the addition of at least one attached plate, it is possible to produce a heating assembly comprising several diffusing plates 1 juxtaposed to one another. The plates are then preferably arranged in close proximity to one another, or even so as to be in contact with one another. 13
Par ailleurs, selon une autre variante de ce second mode de réalisation illustrée à la figure 4', l'ensemble chauffant électrique est configuré de façon à former le corps d'une semelle de fer à repasser. Selon ce mode d'exécution, le matériau conducteur, par exemple un alliage d'aluminium, est avantageusement disposé entre deux plaques de recouvrement 2 et 20 par exemple en acier inoxydable. La plaque 2 joue un rôle similaire à celui décrit plus haut. La plaque 20, disposée contre la face libre 12 de la plaque diffusante et frappée simultanément avec les autres éléments de l'ensemble, sert de semelle. Pour cette raison, on utilise de préférence une plaque de semelle de type connu dont les propriétés de glisse et de résistance à l'usure sont avantageuses. Il est également possible de fixer la plaque 20 après la frappe, par exemple par collage, rivetage ou vissage.Furthermore, according to another variant of this second embodiment illustrated in FIG. 4 ', the electric heating assembly is configured so as to form the body of an iron soleplate. According to this embodiment, the conductive material, for example an aluminum alloy, is advantageously disposed between two cover plates 2 and 20, for example of stainless steel. Plate 2 plays a role similar to that described above. The plate 20, disposed against the free face 12 of the diffusing plate and struck simultaneously with the other elements of the assembly, serves as a sole. For this reason, it is preferable to use a sole plate of known type, the sliding properties and resistance to wear of which are advantageous. It is also possible to fix the plate 20 after striking, for example by gluing, riveting or screwing.
Les embouts 7 de l'élément chauffant peuvent être repliés suivant une direction opposée à la plaque 1 et sortir hors de l'ensemble par des orifices ou rainures spécialement prévus à cette fin dans la plaque de recouvrement. Les embouts ainsi disposés peuvent être utilisés pour un branchement de type standard. Les embouts 7 peuvent également se- prolonger dans le plan de l'ensemble pour sortir par le côté de celui-ci. Les matrices de frappe sont prévues avec des dégagements pour éviter tout dommage qui pourrait être causé auxdits embouts.The ends 7 of the heating element can be folded in a direction opposite to the plate 1 and exit from the assembly by holes or grooves specially provided for this purpose in the cover plate. The tips thus arranged can be used for a standard type connection. The end pieces 7 can also extend in the plane of the assembly to exit from the side thereof. The striking dies are provided with clearances to avoid any damage that could be caused to said tips.
Par ailleurs, selon diverses variantes, il est prévu d'insérer des capteurs, notamment des capteurs de température, permettant d'assurer la régulation et/ou la sécurité de l'ensemble chauffant. Ces capteurs, de type connu, peuvent être insérés entre les plaques 1 et 2, par exemple à proximité de l'élément chauffant.Furthermore, according to various variants, provision is made for inserting sensors, in particular temperature sensors, making it possible to ensure regulation and / or safety of the heating assembly. These sensors, of known type, can be inserted between the plates 1 and 2, for example near the heating element.
La figure 2' illustre le procédé utilisé pour l'assemblage des différents éléments constituants de l'ensemble chauffant électrique selon l'invention.FIG. 2 ′ illustrates the process used for assembling the various constituent elements of the electric heating assembly according to the invention.
Tel que déjà décrit, on utilise un ensemble de plaques 1 et 2 et au moins un élément chauffant 4, les plaques comprenant ou non une ou plusieurs gorges 3 préformées. Selon une variante d'exécution avantageuse, il est prévu de prépositionner ou de préassembler les plaques par tout moyen approprié de type connu, comme par exemple par soudage 8, par collage, sertissage, etc., afin de faciliter la réalisation de la frappe.As already described, a set of plates 1 and 2 and at least one heating element 4 are used, the plates optionally comprising one or more preformed grooves 3. According to an advantageous alternative embodiment, provision is made to preposition or pre-assemble the plates by any suitable means of known type, such as for example by welding 8, by bonding, crimping, etc., in order to facilitate the production of the strike.
Il peut s'avérer avantageux d'utiliser un lubrifiant approprié de type connu afin d'éviter tout problème d'adhérence de l'un ou l'autre des éléments de l'ensemble contre les outils de frappe 10.It may prove advantageous to use an appropriate lubricant of known type in order to avoid any problem of adhesion of one or other of the elements of the assembly against the striking tools 10.
On effectue ensuite la frappe à chaud.The hot stamping is then carried out.
Cette frappe à chaud est avantageusement réalisée à une température permettant un fluage optimal du matériau constituant la plaque diffusante 1. Pour l'aluminium et ses alliages, cette température se situe entre 400*C et 500'C et de préférence autour de 455* C.This hot stamping is advantageously carried out at a temperature allowing optimal creep of the material constituting the diffusing plate 1. For aluminum and its alloys, this temperature is between 400 ° C. and 500 ° C. and preferably around 455 ° C. .
Dans le cas où la plaque diffusante est en aluminium, la pression minimale exercée lors de la frappe se situe avantageusement autour de 250 N/mm2 et la vitesse de frappe est en général d'au moins 0.30 m/s.In the case where the diffusing plate is made of aluminum, the minimum pressure exerted during striking is advantageously around 250 N / mm 2 and the striking speed is generally at least 0.30 m / s.
L'assemblage des différents éléments par frappe à chaud permet que l'ensemble soit maintenu par une liaison mécanique intime entre d'une part la plaque diffusante 1 et la plaque de recouvrement 2 et d'autre part entre la portion attenante de la plaque 1 et le ou les éléments chauffants 4.The assembly of the various elements by hot stamping allows the assembly to be maintained by an intimate mechanical connection between on the one hand the diffusing plate 1 and the cover plate 2 and on the other hand between the adjoining portion of the plate 1 and the heating element (s) 4.
Dans le cas avantageux où une gorge est formée dans la plaque de recouvrement, celle-ci étant la plus rigide des deux plaques, on obtient des conditions permettant à la fois une protection de l'élément chauffant et un fluage facilité lors de la frappe à chaud de la plaque diffusante en matériau plus mou. Tel qu'illustré à la figure l', sous l'effet de la frappe, le matériau de la plaque diffusante s'immisce au moins partiellement autour de l'élément chauffant par 15In the advantageous case where a groove is formed in the cover plate, the latter being the more rigid of the two plates, conditions are obtained allowing both protection of the heating element and facilitated creep when striking at the diffusing plate made of softer material. As illustrated in FIG. 1 a, under the effect of striking, the material of the diffusing plate at least partially interferes around the heating element by 15
fluage de ce matériau. En effet, le matériau de la plaque diffusante remplit la portion de la gorge laissée libre par l'élément chauffant. La figure 1 ' illustre le résultat obtenu avec un élément chauffant de section sensiblement triangulaire. Dans ce cas, le matériau qui s'est immiscé partiellement dans la gorge entoure partiellement les rebords de l'élément chauffant. La figure 4' illustre quant à elle le résultat obtenu avec un élément chauffant de section sensiblement circulaire agencé entre un ensemble de plaques de façon à former une semelle de fer à repasser.creep of this material. Indeed, the material of the diffusing plate fills the portion of the groove left free by the heating element. Figure 1 'illustrates the result obtained with a heating element of substantially triangular section. In this case, the material which has partially interfered in the groove partially surrounds the edges of the heating element. Figure 4 'illustrates the result obtained with a heating element of substantially circular section arranged between a set of plates so as to form an iron soleplate.
La frappe à chaud procure donc un effet multiple: d'une peut, une forte cohésion entre les plaques diffusantes 1 et les plaques de recouvrement 2 et/ou 20 rapportées; d'autre part, une forte cohésion entre l'élément chauffant 4 et la portion adjacente de la plaque diffusante 1 , notamment la portion de la gorge 3 remplie par fluage du matériau de la plaque diffusante. Cette force de cohésion procure également un effet additionnel de maintien par serrage de l'élément chauffant 4 maintenu de façon fixe entre la portion de la plaque de recouvrement 2 l'entourant partiellement et la portion adjacente de la plaque diffusante 1. L'ensemble chauffant électrique résultant présente donc une très grande cohésion. Il est également résistant, stable et durable. Par ailleurs, la simplicité et la rapidité du procédé de frappe à chaud permettent d'obtenir une vaste gamme de formes d'exécution différentes, à un coût très avantageux. Le procédé de frappe à chaud se prête par ailleurs bien à l'automatisation.Hot stamping therefore provides a multiple effect: a little, strong cohesion between the diffusing plates 1 and the covering plates 2 and / or 20 added; on the other hand, strong cohesion between the heating element 4 and the adjacent portion of the diffusing plate 1, in particular the portion of the groove 3 filled by creep of the material of the diffusing plate. This cohesive force also provides an additional clamping retention effect of the heating element 4 fixedly maintained between the portion of the covering plate 2 partially surrounding it and the adjacent portion of the diffusing plate 1. The heating assembly resulting electric therefore has a very high cohesion. It is also strong, stable and durable. Furthermore, the simplicity and speed of the hot stamping process make it possible to obtain a wide range of different embodiments, at a very advantageous cost. The hot stamping process also lends itself well to automation.
Il est à noter que contrairement à ce que l'on aurait pu prédire, la frappe à chaud n'endommage aucunement l'élément chauffant. En effet, les forces et les vitesses impliquées dans ce type de procédés sont telles que tout aurait porté à croire que l'élément chauffant n'en sortirait pas indemne.It should be noted that contrary to what one might have predicted, hot stamping does not damage the heating element in any way. Indeed, the forces and speeds involved in this type of process are such that everything would have led to believe that the heating element would not come out unscathed.
Le procédé d'assemblage ainsi que l'ensemble chauffant électrique selon l'invention permettent donc d'obtenir par exemple un fond chauffant ou un diffuseur thermique pouvant être régulé suivant plusieurs allures de chauffe, offrant un rendement thermique élevé ainsi qu'une répartition calorifique optimale et pouvant supporter des puissances importantes sans décohésion de l'ensemble à long terme.The assembly process and the electrical heating assembly according to the invention therefore make it possible, for example, to obtain a heating base or a thermal diffuser which can be regulated according to several heating stages, offering a high thermal efficiency as well as a heat distribution. optimal and able to support significant powers without decohesion of the assembly in the long term.
Les formes et les dimensions de l'ensemble chauffant peuvent varier en fonction de toute la panoplie d'application correspondante.The shapes and dimensions of the heating assembly can vary depending on the entire range of corresponding applications.
L'invention n'est pas limitée aux exemples décrits et représentés. Diverses modifications peuvent y être apportées sans sortir du cadre de l'invention.The invention is not limited to the examples described and shown. Various modifications can be made without departing from the scope of the invention.
POSSIBILITES D'APPLICATION INDUSTRIELLEPOSSIBILITIES OF INDUSTRIAL APPLICATION
L'invention trouve son application dans la réalisation d'ensembles chauffants électriques. The invention finds its application in the production of electric heating assemblies.

Claims

REVENDICATIONS
1. Procédé d'assemblage d'un ensemble chauffant électrique comprenant au s moins une plaque diffusante (1) et au moins un élément chauffant (4) disposé contre la plaque diffusante (1), comprenant les étapes suivantes: -les éléments chauffants (4) sont disposés contre la plaque diffusante (1), -l'ensemble est soumis à une frappe à chaud.1. A method of assembling an electric heating assembly comprising at least one diffusing plate (1) and at least one heating element (4) disposed against the diffusing plate (1), comprising the following steps: the heating elements ( 4) are arranged against the diffusing plate (1), -the assembly is subjected to a hot stamping.
0 2. Procédé d'assemblage d'un ensemble chauffant électrique selon la revendication 1 , comprenant les étapes préliminaires suivantes: -au moins une gorge (3, 3') à laquelle sera associée au moins un élément chauffant (4) est préformée dans au moins une portion d'au moins une plaque diffusante (1) et/ou dans l'outil de frappe (10). 5 -chaque élément chauffant (4) associé à une gorge (3, 3') donnée est disposé contre les plaques diffusantes (1) correspondantes de façon à cheminer suivant un parcours sensiblement-similaire à celui de la gorge correspondante.0 2. A method of assembling an electric heating assembly according to claim 1, comprising the following preliminary steps: -at least one groove (3, 3 ') with which at least one heating element (4) will be associated is preformed in at least a portion of at least one diffusing plate (1) and / or in the striking tool (10). 5 - each heating element (4) associated with a given groove (3, 3 ') is arranged against the corresponding diffusing plates (1) so as to travel along a path substantially-similar to that of the corresponding groove.
3. Procédé d'assemblage d'un ensemble chauffant électrique, selon la revendication 1 , ledit ensemble comprenant également au moins une plaque de recouvrement (2; 20) et le ou les éléments chauffants (4) étant disposés entre d'une part les plaques diffusantes (1) et d'autre part les plaques de recouvrement (2), comprenant les étapes suivantes:3. Method for assembling an electric heating assembly, according to claim 1, said assembly also comprising at least one cover plate (2; 20) and the heating element or elements (4) being arranged on the one hand between the diffusing plates (1) and on the other hand the covering plates (2), comprising the following steps:
- les éléments chauffants (4) sont disposés entre d'une part les plaques diffusantes (1) et d'autre part les plaques de recouvrement (2),the heating elements (4) are arranged between on the one hand the diffusing plates (1) and on the other hand the covering plates (2),
-l'ensemble est soumis à une frappe à chaud.-the whole is subjected to a hot stamping.
4. Procédé d'assemblage d'un ensemble chauffant électrique selon la revendication 3, comprenant les étapes préliminaires suivantes: -au moins une gorge (3, 3') à laquelle sera associée au moins un élément chauffant (4) est préformée dans au moins une portion d'au moins une plaque de recouvrement (2) et/ou diffusante (1) et/ou dans l'outil de frappe (10), -chaque élément chauffant (4) associé à une gorge (3, 3') donnée est disposé entre les plaques de recouvrement (2) et diffusantes (1) correspondantes de façon à cheminer suivant un parcours sensiblement similaire à celui de la gorge (3, 3') correspondante.4. Method for assembling an electric heating assembly according to claim 3, comprising the following preliminary steps: -at least one groove (3, 3 ') with which at least one heating element (4) will be associated is preformed in at at least a portion of at least one cover plate (2) and / or diffusing plate (1) and / or in the striking tool (10), each heating element (4) associated with a given groove (3, 3 ′) is disposed between the corresponding covering (2) and diffusing plates (1) so as to travel along a path substantially similar to that of the groove (3 , 3 ') corresponding.
5. Procédé d'assemblage d'un ensemble chauffant électrique selon l'une des revendications 1 ou 3, dans lequel, sous l'effet de la frappe, le matériau de la plaque diffusante (1) s'immisce au moins partiellement autour des éléments chauffants (4) par fluage de ce matériau.5. A method of assembling an electric heating assembly according to one of claims 1 or 3, wherein, under the effect of striking, the material of the diffusing plate (1) at least partially interferes around the heating elements (4) by creep of this material.
6. Procédé d'assemblage d'un ensemble chauffant électrique selon l'une des revendications 2 ou 4, dans lequel, sous l'effet de la frappe, le matériau de la plaque diffusante remplit la portion de la gorge (3, 3') laissée libre par l'élément chauffant (4), de façon à entourer au moins partiellement celui-ci.6. Method of assembling an electric heating assembly according to one of claims 2 or 4, in which, under the effect of striking, the material of the diffusing plate fills the portion of the groove (3, 3 ' ) left free by the heating element (4), so as to at least partially surround it.
7. Procédé d'assemblage d'un ensemble chauffant électrique selon l'une des revendication 2 ou 4, dans lequel les dites gorges (3, 3') sont conformées de façon à présenter une forme correspondant sensiblement au profil de l'élément chauffant (4) associé.7. A method of assembling an electric heating assembly according to one of claims 2 or 4, wherein said grooves (3, 3 ') are shaped so as to have a shape corresponding substantially to the profile of the heating element (4) associated.
8. Procédé d'assemblage d'un ensemble chauffant électrique selon l'une des revendication précédentes, dans lequel la frappe à chaud est réalisée à une température permettant un fluage optimal du matériau constituant la plaque diffusante (1).8. A method of assembling an electric heating assembly according to one of the preceding claim, wherein the hot stamping is carried out at a temperature allowing optimal creep of the material constituting the diffusing plate (1).
9. Procédé d'assemblage d'un ensemble chauffant électrique selon la revendication 8, dans lequel ladite température de fluage se situe entre 400*C et 500*C et de préférence autour de 455*C.9. A method of assembling an electric heater assembly according to claim 8, wherein said melt temperature is between 400 ° C and 500 ° C and preferably around 455 ° C.
10. Procédé d'assemblage d'un ensemble chauffant électrique selon l'une des revendications précédentes, dans lequel la frappe à chaud est réalisée avec une pression minimale se situant autour de 250 N/mm2. 10. Method for assembling an electric heating assembly according to one of the preceding claims, in which the hot stamping is carried out with a minimum pressure of around 250 N / mm 2 .
11. Procédé d'assemblage d'un ensemble chauffant électrique selon l'une des revendications précédentes, dans lequel la frappe à chaud est réalisée avec une vitesse minimale de 0.30 m/s.11. Method for assembling an electric heating assembly according to one of the preceding claims, in which the hot stamping is carried out with a minimum speed of 0.30 m / s.
12. Procédé d'assemblage d'un ensemble chauffant électrique selon l'une des revendications précédentes, dans lequel au moins deux des éléments constituants de l'ensemble sont prépositionnés ou préassemblés avant la frappe à chaud par soudure (8), collage ou sertissage.12. Method for assembling an electric heating assembly according to one of the preceding claims, in which at least two of the constituent elements of the assembly are pre-positioned or pre-assembled before hot stamping by welding (8), bonding or crimping .
13. Ensemble chauffant électrique, obtenu par le procédé selon l'une des revendications 1 à 12, comprenant au moins une plaque diffusante (1) en matériau métallique, et au moins un élément chauffant (4) disposé contre ladite plaque, caractérisé en ce que l'ensemble est maintenu par une liaison mécanique intime entre les différents éléments.13. Electric heating assembly, obtained by the method according to one of claims 1 to 12, comprising at least one diffusing plate (1) made of metallic material, and at least one heating element (4) disposed against said plate, characterized in that that the whole is maintained by an intimate mechanical connection between the different elements.
14.Ensemble chauffant électrique selon la revendication 13, dans lequel la liaison mécanique intime entre les différents éléments résulte d'une frappe à chaud à laquelle ledit ensemble à été soumis.14.Electric heating assembly according to claim 13, wherein the intimate mechanical connection between the different elements results from a hot stamping to which said assembly has been subjected.
15. Ensemble chauffant électrique selon l'une des revendications 13 ou 14, comprenant également au moins une plaque de recouvrement (2; 20), l'élément chauffant étant disposé entre les plaques de recouvrement et diffusantes.15. Electric heating assembly according to one of claims 13 or 14, also comprising at least one cover plate (2; 20), the heating element being disposed between the cover and diffusing plates.
16.Ensemble chauffant électrique selon l'une des revendications 13 à 15, dans lequel au moins une gorge (3) est préformée dans au moins une portion d'au moins une plaque de recouvrement (2) et/ou diffusante (1 ) de façon à former un logement dans lequel repose au moins une portion de la section d'au moins un élément chauffant, le parcours de ladite gorge correspondant sensiblement à celui de l'élément chauffant correspondant. 16.Electric heating assembly according to one of claims 13 to 15, wherein at least one groove (3) is preformed in at least a portion of at least one cover plate (2) and / or diffusing (1) of so as to form a housing in which rests at least a portion of the section of at least one heating element, the path of said groove corresponding substantially to that of the corresponding heating element.
17. Ensemble chauffant électrique selon l'une des revendications 15 ou 16, ledit ensemble étant étanche.17. Electric heating assembly according to one of claims 15 or 16, said assembly being sealed.
18.Ensemble chauffant électrique selon l'une des revendications 13 à 17, dans lequel la plaque diffusante (1) est en alliage à base d'aluminium.18.Electric heating assembly according to one of claims 13 to 17, wherein the diffusing plate (1) is made of aluminum-based alloy.
19. Ensemble chauffant électrique selon l'une des revendications 13 à 17, dans lequel la plaque diffusante (1) est en alliage à base de cuivre.19. Electric heating assembly according to one of claims 13 to 17, wherein the diffusing plate (1) is made of a copper-based alloy.
20. Ensemble chauffant électrique selon l'une des revendications 13 à 18, dans lequel la plaque de recouvrement (2) est en acier.20. Electric heating assembly according to one of claims 13 to 18, in which the cover plate (2) is made of steel.
21. Ensemble chauffant électrique selon l'une des revendications 13 à 20, dans lequel au moins un capteur de température est disposé.21. Electric heating assembly according to one of claims 13 to 20, in which at least one temperature sensor is arranged.
22.Appareil électroménager comprenant un ensemble chauffant électrique selon l'une des revendications 13 à 21.22. Household appliance comprising an electric heating assembly according to one of claims 13 to 21.
23.Appareil électroménager selon la revendication 22, consistant en un appareil de cuisson.23. Home appliance according to claim 22, consisting of a cooking appliance.
24.Appareil électroménager selon la revendication 22, consistant en un dispositif destiné à chauffer un fluide, notamment de l'eau.24. Home appliance according to claim 22, consisting of a device for heating a fluid, in particular water.
25.Appareil électroménager selon la revendication 22, consistant en un panneau radiant de chauffage.25. Home appliance according to claim 22, consisting of a radiant heating panel.
26.Appareil électroménager selon la revendication 22, consistant en un dispositif de repassage, notamment une semelle de fer à repasser. 26. Home appliance according to claim 22, consisting of an ironing device, in particular an iron soleplate.
EP96902320A 1995-02-01 1996-01-31 Heating element with a diffusing plate, and method for assembling same Expired - Lifetime EP0807367B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9501347A FR2730119B1 (en) 1995-02-01 1995-02-01 ELECTRIC HEATING ASSEMBLY
FR9501348 1995-02-01
FR9501348A FR2730120B1 (en) 1995-02-01 1995-02-01 HEATING ELEMENT WITH DIFFUSING PLATE
FR9501347 1995-02-01
PCT/FR1996/000167 WO1996024233A1 (en) 1995-02-01 1996-01-31 Heating element with a diffusing plate, and method for assembling same

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EP0807367B1 EP0807367B1 (en) 2000-04-26

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CN1172574A (en) 1998-02-04
JPH10513303A (en) 1998-12-15
DE69607939T2 (en) 2000-11-09
MX9705805A (en) 1998-07-31
ES2147916T3 (en) 2000-10-01
BR9607163A (en) 1997-11-11
WO1996024233A1 (en) 1996-08-08
EP0807367B1 (en) 2000-04-26
DE69607939D1 (en) 2000-05-31

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