EP1619932B1 - Insulating element - Google Patents

Insulating element Download PDF

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Publication number
EP1619932B1
EP1619932B1 EP05291461A EP05291461A EP1619932B1 EP 1619932 B1 EP1619932 B1 EP 1619932B1 EP 05291461 A EP05291461 A EP 05291461A EP 05291461 A EP05291461 A EP 05291461A EP 1619932 B1 EP1619932 B1 EP 1619932B1
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EP
European Patent Office
Prior art keywords
insulating
heating element
insulating element
longitudinal
receptacles
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EP05291461A
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German (de)
French (fr)
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EP1619932A3 (en
EP1619932A2 (en
Inventor
Dominique Soulard
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Atlantic Industrie SAS
Atlantic Industries Inc
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Atlantic Industrie SAS
Atlantic Industries Inc
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Priority to PL05291461T priority Critical patent/PL1619932T3/en
Publication of EP1619932A2 publication Critical patent/EP1619932A2/en
Publication of EP1619932A3 publication Critical patent/EP1619932A3/en
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Publication of EP1619932B1 publication Critical patent/EP1619932B1/en
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    • 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
    • H05B3/46—Heating elements having the shape of rods or tubes non-flexible heating conductor mounted on insulating base

Definitions

  • the invention relates to an insulating element used for the manufacture of heating elements consisting of mounting conductive son on at least one elongated body of insulating material.
  • Heating elements known by specialists "steatite resistance" are known to be mounted in a metal sheath.
  • These heating elements are constituted by mounting a wire wound or twisted and mounted on insulating elements steatite commonly called "barrel”.
  • Such heating elements are for example described in the document US Patent 1670437 .
  • the assembled assembly is held in position by a central fixing and holding rod, and is then locked in position.
  • connection of these heating elements of known type is generally done by means of lugs, terminals, nuts or other auxiliary means of electrical and mechanical connections.
  • the insulating elements are generally made of ceramic material, generally steatite, and have a central orifice of small diameter for the passage of the central holding rod.
  • the document CH 138 266 discloses insulating elements having at each end means for indexing in rotation of an insulating element relative to its neighbor, so as to achieve an angular offset between successive insulators while ensuring a locking in translation of the conductive wire.
  • Heating elements of known type generally give satisfaction, but require a significant preparation and assembly time, as well as a number of connection accessories further increasing the finishing time and electrical control of the mounted assembly.
  • a first object of the invention is to improve the state of the art, by providing a new insulating element for the manufacture of heating elements for quick and easy assembly.
  • a second object of the invention is to provide a new insulating element retaining the high temperature mechanical and dielectric characteristics of the prior art, while allowing to remove the holding rod of the prior art.
  • a third object of the invention is to provide a heating element consisting of assembling insulating elements according to the invention, and to avoid the use of terminals, nuts, lugs or other auxiliary means of connection.
  • the invention also relates to a heating element consisting of assembling insulating elements according to the invention and a connecting head of insulating material.
  • a heating assembly intended to be mounted on an electric water heater tank comprises a sheath 1 of enamelled metal, a flange 2 forming a cover, and a bundle 3 of insulated conductors connected to a steatite resistance comprising an alignment of insulating elements 5a 6 on which is mounted conductor wire generally twisted and intended to be worn at high temperature.
  • each insulating element 5a, 6 has a central recess providing a relief of the insulating element greater than ten percent, while maintaining the mechanical and dielectric characteristics of the insulating element at high temperature.
  • the assembly also comprises a glove finger 4 of a type known per se and does not require a more detailed description.
  • the insulated wires of the bundle 3 are connected to a heating thermostat, not shown, and are directly connected to the conductive wires of the steatite resistance by crimping or direct assembly, so as to avoid the use of terminals, nuts, lugs, or other auxiliary means. connection.
  • the steatite resistance is maintained in the sheath 1 by a peripheral locking means of the circlip type or the like.
  • a heating element comprises a connecting head 6 of insulating material, for example steatite, and several insulating elements 5a, 5b, 5c, 5d, made for example steatite.
  • the insulating member 5a is aligned with the connecting head 6, while the adjacent insulators 5a and 5b, 5b and 5c, 5c and 5d are aligned with each other at a predetermined angular offset.
  • the connecting head 6 of insulating material advantageously has a peripheral shoulder 7 intended to cooperate with a circlip or equivalent means of peripheral locking, ensuring the vertical retention of the steatite resistance inside the enamelled sheath 1 described with reference to the figure 1 .
  • each insulating element 5a, 5b, 5c, 5d and the connection head 6 has a central recess providing a relief of the insulating element greater than ten percent, while retaining the mechanical and dielectric characteristics of the insulating element at high temperature.
  • the central lightening of the insulating elements 5a, 5b, 5c, 5d and of the connection head 6 makes it possible, by the rigidity and the resulting weight gain, to eliminate the central fixing rod of the prior art.
  • This central fixing rod of the prior art had in effect the mechanical strength, mainly in bending, the assembly of the insulating elements and the head between them during the assembly phases.
  • the assembled assembly is less heavy, and deforms little under the effect of its own weight.
  • the assembly of the insulating elements and the head between them is subjected to a much lower bending during the assembly phases and withstands the different phases of assembly, without requiring the central fixing rod of the prior art.
  • an insulating element according to the invention has at one end indexing means 10 located on either side of a central recess 13.
  • the central recess 13 provides a significant relief of the insulating member 5, while retaining the mechanical and high temperature dielectric characteristics of the prior art.
  • the insulating element 5 comprises at the other end of the other indexing means 11 located on either side of the central recess 13 and intended to cooperate with indexing means 10 of an adjacent insulating element 5, not shown.
  • the indexing means 10 and 11 are angularly offset by a predetermined value to obtain a stepped bending of the unrepresented lead wire.
  • the bent wire passes from one insulating element 5 to the other via channels 12 or passages, allowing the communication of a longitudinal housing 8 of an insulating element with an adjacent longitudinal housing 8 of another adjacent insulating element.
  • the insulating element 5 comprises twelve longitudinal housings 8, separated regularly by spacing strips 9 intended to come into substantially contact with the inner surface of an enamelled sheath 1 described with reference to the figure 1 .
  • the indexing means 10 and 11 are made in the form of pins or male positioning conformations and in the form of housings or female positioning conformations intended to receive a locating pin of an adjacent insulating element.
  • the positioning pins 10 and the receiving housings 11 are preferably arranged on either side of the central recess 13 with an angular offset equal to half the angle defined by two successive longitudinal housings 8.
  • the angle formed by two successive longitudinal housing 8 is 15 degrees, while the angular offset of the lugs 10 and the housing 11 is 7 degrees and a half: this arrangement thus makes it possible to obtain a bend in stair wire sufficient to ensure longitudinal retention, while avoiding a risk of thermal expansion likely to remove two successive insulating elements.
  • the lightening of the heating elements according to the invention and their angular offset which allows cooperation with the stepwise bending of the conductive wire makes it possible to eliminate the holding rod of the prior art, while maintaining a good vertical stability of the steatite resistance. , even at high temperatures.
  • the central recess may be cylindrical or adopt any other geometric conformation, the essential being to obtain a reduction of the order of one third compared to the prior art while retaining the mechanical and dielectric characteristics at high temperature of the prior art.

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  • Resistance Heating (AREA)
  • Bipolar Transistors (AREA)

Abstract

The insulating unit (5) has a central recess (13) that permits to reduce the weight of the insulating unit greater than ten percent. Notches (10, 11) rotate the insulating unit with respect to an adjacent insulating unit so as to provide an angular shift between successive insulating units and block translation of a conductor wire of a steatitic resistor. The unit (11) cooperates with the unit (10) of an adjacent insulating unit. An independent claim is also included for a heating unit constituted by assembling of a set of insulting units.

Description

L'invention est relative à un élément isolant utilisé pour la fabrication d'éléments chauffants constitués par montage de fils conducteurs sur au moins un corps allongé en matériau isolant.The invention relates to an insulating element used for the manufacture of heating elements consisting of mounting conductive son on at least one elongated body of insulating material.

On connaît des éléments chauffants appelés par les spécialistes « résistance stéatite » destinés à être montés dans un fourreau métallique.Heating elements known by specialists "steatite resistance" are known to be mounted in a metal sheath.

Ces éléments chauffants sont constitués· par montage d'un fil métallique enroulé ou torsadé et monté sur des éléments isolants en stéatite communément appelés « barillet ».These heating elements are constituted by mounting a wire wound or twisted and mounted on insulating elements steatite commonly called "barrel".

De tels éléments chauffants sont par exemple décrits dans le document US-A-1670437 .Such heating elements are for example described in the document US Patent 1670437 .

L'ensemble monté est maintenu en position par une tige centrale de fixation et de maintien, puis est ensuite verrouillé en position.The assembled assembly is held in position by a central fixing and holding rod, and is then locked in position.

La connexion de ces éléments chauffants de type connu s'effectue généralement au moyen de cosses, bornes, écrous ou autres moyens auxiliaires de raccordements électrique et mécanique.The connection of these heating elements of known type is generally done by means of lugs, terminals, nuts or other auxiliary means of electrical and mechanical connections.

Les éléments isolants, communément appelés « barillet », sont généralement réalisés en matériau céramique, généralement en stéatite, et présentent un orifice central de faible diamètre destiné au passage de la tige centrale de maintien.The insulating elements, commonly known as "barrel", are generally made of ceramic material, generally steatite, and have a central orifice of small diameter for the passage of the central holding rod.

Le document CH 138 266 décrit des éléments isolants présentant à chaque extrémité des moyens d'indexation en rotation d'un élément isolant par rapport à son voisin, de manière à réaliser un décalage angulaire entre éléments isolants successifs tout en assurant un blocage en translation du fil conducteur.The document CH 138 266 discloses insulating elements having at each end means for indexing in rotation of an insulating element relative to its neighbor, so as to achieve an angular offset between successive insulators while ensuring a locking in translation of the conductive wire.

Les éléments chauffants de type connu donnent généralement satisfaction, mais nécessitent un temps de préparation et de montage important, ainsi qu'un nombre d'accessoires de connexion augmentant encore le temps de finition et de contrôle électrique de l'ensemble monté.Heating elements of known type generally give satisfaction, but require a significant preparation and assembly time, as well as a number of connection accessories further increasing the finishing time and electrical control of the mounted assembly.

Un premier but de l'invention est de perfectionner l'état de la technique connue, en fournissant un nouvel élément isolant pour la fabrication d'éléments chauffants permettant un montage rapide et facile.A first object of the invention is to improve the state of the art, by providing a new insulating element for the manufacture of heating elements for quick and easy assembly.

Un deuxième but de l'invention est de fournir un nouvel élément isolant conservant les caractéristiques mécaniques et diélectriques à haute température de l'art antérieur, tout en permettant de supprimer la tige de maintien de l'art antérieur.A second object of the invention is to provide a new insulating element retaining the high temperature mechanical and dielectric characteristics of the prior art, while allowing to remove the holding rod of the prior art.

Un troisième but de l'invention est de fournir un élément chauffant constitué par assemblage d'éléments isolants selon l'invention, et permettant d'éviter l'utilisation de bornes, écrous, cosses ou autres moyens auxiliaires de raccordement.A third object of the invention is to provide a heating element consisting of assembling insulating elements according to the invention, and to avoid the use of terminals, nuts, lugs or other auxiliary means of connection.

L'invention a pour objet un élément chauffant constitué par assemblage d'éléments isolants et d'une tête de raccordement en matériau isolant,
dans lequel chaque élément isolant communément appelé « barillet » est réalisé en matériau céramique, notamment en stéatite, et présente :

  • un évidement central fournissant un allégement central de l'élément isolant ayant un premier diamètre,
  • une pluralité de logements longitudinaux ayant un deuxième diamètre, pour des fils conducteurs enroulés ou torsadés, lesdits logements longitudinaux étant séparés régulièrement par des barrettes d'espacement ;
  • et à chaque extrémité des moyens d'indexation en rotation de l'élément isolant par rapport à un élément isolant suivant, de manière à réaliser un décalage angulaire entre éléments isolants successifs, tout en assurant un blocage en translation du fil conducteur,
ledit élément chauffant étant constitué par montage de fils conducteurs enroulés ou torsadés sur un alignement d'une tête de raccordement en matériau isolant et de plusieurs éléments isolants, dans des logements longitudinaux successifs ;
caractérisé par le fait que ledit premier diamètre est supérieur à deux fois la valeur dudit deuxième diamètre et par le fait que chaque élément isolant comporte à chaque extrémité des passages de fil conducteur faisant communiquer un logement longitudinal d'un élément isolant avec un logement longitudinal angulairement décalé d'un autre élément isolant, pour obtenir un coudage en escalier du fil conducteur qui, en coopération avec l'allégement des éléments chauffants, et leur décalage angulaire, permet de supprimer la tige de maintien.The subject of the invention is a heating element constituted by assembling insulating elements and a connecting head made of insulating material,
wherein each insulating element commonly referred to as a "barrel" is made of ceramic material, in particular steatite, and has:
  • a central recess providing central relief of the insulating member having a first diameter,
  • a plurality of longitudinal housings having a second diameter, for wound or twisted conductive wires, said longitudinal housing being separated regularly by spacers;
  • and at each end of the indexing means in rotation of the insulating element with respect to a subsequent insulating element, so as to achieve an angular offset between successive insulators, while ensuring a locking in translation of the conductive wire,
said heating element being constituted by mounting conductive wires wound or twisted on an alignment of a connecting head of insulating material and of several insulating elements, in successive longitudinal housings;
characterized in that said first diameter is greater than twice the value of said second diameter and in that each insulating member has at each end conductive wire passages communicating a longitudinal housing of an insulating member with an angularly longitudinal housing offset from another insulating element, to obtain a stepped bend of the conductor wire which, in cooperation with the lightening of the heating elements, and their angular offset, allows to remove the holding rod.

Selon d'autres caractéristiques de l'invention

  • l'élément isolant présente une conformation cylindrique comportant deux ergots de positionnement et deux logements de réception d'ergot de positionnement, de manière à aligner les éléments isolants avec un décalage angulaire prédéterminé.
  • les ergots de positionnement et les logements de réception sont décalés angulairement et disposés de part et d'autre de l'évidement central.
  • l'élément isolant comporte à chaque extrémité des passages de fil conducteur faisant communiquer un logement longitudinal d'un élément isolant avec un logement longitudinal angulairement décalé d'un autre élément isolant.
  • le décalage angulaire est égal à la moitié de l'angle défini par deux logements longitudinaux successifs.
According to other features of the invention
  • the insulating element has a cylindrical conformation comprising two locating lugs and two locating pin receiving housings, so as to align the insulators with a predetermined angular offset.
  • the positioning pins and the receiving housings are angularly offset and arranged on either side of the central recess.
  • the insulating element comprises at each end conductive wire passages communicating a longitudinal housing of an insulating member with a longitudinal housing angularly offset from another insulating member.
  • the angular offset is equal to half the angle defined by two successive longitudinal housings.

L'invention a également pour objet un élément chauffant constitué par assemblage d'éléments isolants selon l'invention et d'une tête de raccordement en matériau isolant.The invention also relates to a heating element consisting of assembling insulating elements according to the invention and a connecting head of insulating material.

Selon d'autres caractéristiques alternatives de l'invention :

  • des extrémités de fils conducteurs sont connectées à un thermostat de chauffage et sont directement serties ou assemblées aux conducteurs raccordés au thermostat, de manière à éviter l'utilisation de bornes, écrous, cosses, ou autres moyens auxiliaires de raccordement.
  • la tête de raccordement en matériau isolant peut présenter un épaulement périphérique destiné à coopérer avec un circlips ou moyen équivalent de blocage périphérique pour assurer le maintien vertical de l'élément chauffant.
According to other alternative features of the invention:
  • ends of conductive wires are connected to a heating thermostat and are directly crimped or assembled to the conductors connected to the thermostat, so as to avoid the use of terminals, nuts, lugs, or other auxiliary means of connection.
  • the connection head of insulating material may have a peripheral shoulder intended to cooperate with a circlip or equivalent means of peripheral locking to ensure the vertical retention of the heating element.

L'invention sera mieux comprise grâce à la description qui va suivre donnée à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels :

  • La figure 1 représente schématiquement une vue en perspective avec arrachement partiel d'un ensemble chauffant destiné à un chauffe-eau électrique.
  • La figure 2 représente schématiquement une vue en perspective d'un élément chauffant selon l'invention, dans lequel les fils conducteurs ne sont pas représentés.
  • La figure 3 représente schématiquement deux vues en perspective selon deux angles différents des deux extrémités d'un élément isolant selon l'invention.
The invention will be better understood from the following description given by way of nonlimiting example with reference to the accompanying drawings in which:
  • The figure 1 schematically represents a partially cutaway perspective view of a heater assembly for an electric water heater.
  • The figure 2 schematically represents a perspective view of a heating element according to the invention, in which the conductive wires are not shown.
  • The figure 3 schematically represents two perspective views at two different angles of the two ends of an insulating member according to the invention.

En référence à la figure 1, un ensemble chauffant destiné à être monté sur une cuve de chauffe-eau électrique comporte un fourreau 1 en métal émaillé, une bride 2 formant couvercle, et un faisceau 3 de conducteurs isolés raccordés à une résistance stéatite comportant un alignement d'éléments isolants 5a, 6 sur lesquels est monté du fil conducteur généralement torsadé et destiné à être porté à haute température.With reference to the figure 1 , a heating assembly intended to be mounted on an electric water heater tank comprises a sheath 1 of enamelled metal, a flange 2 forming a cover, and a bundle 3 of insulated conductors connected to a steatite resistance comprising an alignment of insulating elements 5a 6 on which is mounted conductor wire generally twisted and intended to be worn at high temperature.

Selon l'invention, chaque élément isolant 5a, 6 présente un évidement central fournissant un allégement de l'élément isolant supérieur à dix pour cent, tout en conservant les caractéristiques mécaniques et diélectriques de l'élément isolant à haute température.According to the invention, each insulating element 5a, 6 has a central recess providing a relief of the insulating element greater than ten percent, while maintaining the mechanical and dielectric characteristics of the insulating element at high temperature.

L'ensemble comporte également un doigt de gant 4 de type connu en soi et ne nécessitant pas de description plus détaillée.The assembly also comprises a glove finger 4 of a type known per se and does not require a more detailed description.

Les fils isolés du faisceau 3 sont connectés à un thermostat de chauffage non représenté et sont directement raccordés aux fils conducteurs de la résistance stéatite par sertissage ou assemblage direct, de manière à éviter l'utilisation de bornes, écrous, cosses, ou autres moyens auxiliaires de raccordement.The insulated wires of the bundle 3 are connected to a heating thermostat, not shown, and are directly connected to the conductive wires of the steatite resistance by crimping or direct assembly, so as to avoid the use of terminals, nuts, lugs, or other auxiliary means. connection.

La résistance stéatite est maintenue dans le fourreau 1 par un moyen de blocage périphérique du genre circlips ou analogue.The steatite resistance is maintained in the sheath 1 by a peripheral locking means of the circlip type or the like.

Le montage et le maintien de la résistance stéatite dans le fourreau 1 métallique par un moyen de blocage périphérique permet de supprimer la tige centrale de fixation de l'art antérieur sans conséquence défavorable sur la tenue et le fonctionnement de l'ensemble.Mounting and maintaining the steatite resistance in the metal sleeve 1 by a peripheral locking means makes it possible to eliminate the central fixing rod of the prior art without any adverse effect on the strength and the operation of the assembly.

En référence à la figure 2, un élément chauffant selon l'invention comporte une tête 6 de raccordement en matériau isolant, par exemple en stéatite, et plusieurs éléments isolants 5a, 5b, 5c, 5d, réalisés par exemple en stéatite.With reference to the figure 2 , a heating element according to the invention comprises a connecting head 6 of insulating material, for example steatite, and several insulating elements 5a, 5b, 5c, 5d, made for example steatite.

L'élément isolant 5a est aligné avec la tête de raccordement 6, tandis que les éléments isolants adjacents : 5a et 5b, 5b et 5c, 5c et 5d, sont alignés entre eux avec un décalage angulaire prédéterminé.The insulating member 5a is aligned with the connecting head 6, while the adjacent insulators 5a and 5b, 5b and 5c, 5c and 5d are aligned with each other at a predetermined angular offset.

Ainsi, lorsque le fil conducteur passe d'un élément isolant 5 à un isolant 5 adjacent, il subit un coudage formant une conformation en escalier qui assure le blocage en translation du fil conducteur et permet de respecter les distances d'écartement diélectrique entre parties électriquement actives.Thus, when the conductive wire goes from an insulating member 5 to an adjacent insulator 5, it undergoes a bend forming a staircase conformation which ensures the locking in translation of the conductive wire and allows to respect the dielectric spacing distances between electrically active.

La tête 6 de raccordement en matériau isolant présente avantageusement un épaulement 7 périphérique destiné à coopérer avec un circlips ou moyen équivalent de blocage périphérique, assurant le maintien vertical de la résistance stéatite à l'intérieur du fourreau émaillé 1 décrit en référence à la figure 1.The connecting head 6 of insulating material advantageously has a peripheral shoulder 7 intended to cooperate with a circlip or equivalent means of peripheral locking, ensuring the vertical retention of the steatite resistance inside the enamelled sheath 1 described with reference to the figure 1 .

Selon l'invention, chaque élément isolant 5a, 5b, 5c, 5d et la tête de raccordement 6 présente un évidement central fournissant un allégement de l'élément isolant supérieur à dix pour cent, tout en conservant les caractéristiques mécaniques et diélectriques de l'élément isolant à haute température.According to the invention, each insulating element 5a, 5b, 5c, 5d and the connection head 6 has a central recess providing a relief of the insulating element greater than ten percent, while retaining the mechanical and dielectric characteristics of the insulating element at high temperature.

L'allègement central des éléments isolants 5a, 5b, 5c, 5d et de la tête de raccordement 6 permet par la rigidité et le gain de poids qui en résultent, de supprimer la tige centrale de fixation de l'art antérieur. Cette tige centrale de fixation de l'art antérieur avait en effet pour fonction la tenue mécanique, principalement en flexion, de l'assemblage des éléments isolants et de la tête entre eux pendant les phases de montage.The central lightening of the insulating elements 5a, 5b, 5c, 5d and of the connection head 6 makes it possible, by the rigidity and the resulting weight gain, to eliminate the central fixing rod of the prior art. This central fixing rod of the prior art had in effect the mechanical strength, mainly in bending, the assembly of the insulating elements and the head between them during the assembly phases.

Grâce à l'invention, l'ensemble monté est moins lourd, et se déforme peu sous l'effet de son propre poids.Thanks to the invention, the assembled assembly is less heavy, and deforms little under the effect of its own weight.

L'assemblage des éléments isolants et de la tête entre eux est soumis à une flexion beaucoup plus faible pendant les phases de montage et résiste aux différentes phase du montage, sans nécessiter la tige centrale de fixation de l'art antérieur.The assembly of the insulating elements and the head between them is subjected to a much lower bending during the assembly phases and withstands the different phases of assembly, without requiring the central fixing rod of the prior art.

En référence à la figure 3, un élément isolant selon l'invention présente à une première extrémité des moyens d'indexation 10 situés de part et d'autre d'un évidement central 13.With reference to the figure 3 , an insulating element according to the invention has at one end indexing means 10 located on either side of a central recess 13.

L'évidement central 13 permet d'obtenir un allégement important de l'élément isolant 5, tout en conservant les caractéristiques mécaniques et diélectriques à haute température de l'art antérieur.The central recess 13 provides a significant relief of the insulating member 5, while retaining the mechanical and high temperature dielectric characteristics of the prior art.

L'élément isolant 5 comporte à l'autre extrémité des autres moyens d'indexation 11 situés de part et d'autre de l'évidement central 13 et destinés à coopérer avec des moyens d'indexation 10 d'un élément isolant 5 adjacent, non représenté.The insulating element 5 comprises at the other end of the other indexing means 11 located on either side of the central recess 13 and intended to cooperate with indexing means 10 of an adjacent insulating element 5, not shown.

Les moyens d'indexation 10 et 11 sont décalés angulairement d'une valeur prédéterminée permettant d'obtenir un coudage en escalier du fil conducteur non représenté.The indexing means 10 and 11 are angularly offset by a predetermined value to obtain a stepped bending of the unrepresented lead wire.

Le fil conducteur coudé passe d'un élément isolant 5 à l'autre par l'intermédiaire de canaux 12 ou de passages, permettant la communication d'un logement longitudinal 8 d'un élément isolant avec un logement longitudinal 8 adjacent d'un autre élément isolant 5 adjacent.The bent wire passes from one insulating element 5 to the other via channels 12 or passages, allowing the communication of a longitudinal housing 8 of an insulating element with an adjacent longitudinal housing 8 of another adjacent insulating element.

Dans l'exemple représenté, l'élément isolant 5 comporte douze logements longitudinaux 8, séparés régulièrement par des barrettes 9 d'espacement destiné à venir sensiblement au contact de la surface intérieure d'un fourreau émaillé 1 décrit en référence à la figure 1.In the example shown, the insulating element 5 comprises twelve longitudinal housings 8, separated regularly by spacing strips 9 intended to come into substantially contact with the inner surface of an enamelled sheath 1 described with reference to the figure 1 .

De préférence, les moyens d'indexation 10 et 11 sont réalisés sous forme d'ergots ou conformations mâles de positionnement et sous forme de logements ou conformations femelles de positionnement destinés à recevoir un ergot de positionnement d'un élément isolant 5 adjacent.Preferably, the indexing means 10 and 11 are made in the form of pins or male positioning conformations and in the form of housings or female positioning conformations intended to receive a locating pin of an adjacent insulating element.

Les ergots 10 de positionnement et les logements 11 de réception sont de préférence disposés de part et d'autre de l'évidement central 13 avec un décalage angulaire égal à la moitié de l'angle défini par deux logements longitudinaux 8 successifs.The positioning pins 10 and the receiving housings 11 are preferably arranged on either side of the central recess 13 with an angular offset equal to half the angle defined by two successive longitudinal housings 8.

Dans l'exemple représenté, l'angle formé par deux logements 8 longitudinaux successifs est de 15 degrés, tandis que le décalage angulaire des ergots 10 et des logements 11 est de 7 degrés et demi : cette disposition permet ainsi d'obtenir un coudage en escalier du fil conducteur suffisant pour assurer le maintien longitudinal, tout en évitant un risque de dilatation thermique susceptible de déchausser deux éléments isolants 5 successifs.In the example shown, the angle formed by two successive longitudinal housing 8 is 15 degrees, while the angular offset of the lugs 10 and the housing 11 is 7 degrees and a half: this arrangement thus makes it possible to obtain a bend in stair wire sufficient to ensure longitudinal retention, while avoiding a risk of thermal expansion likely to remove two successive insulating elements.

L'allégement des éléments chauffants selon l'invention et leur décalage angulaire qui permet une coopération avec le coudage en escalier du fil conducteur permet de supprimer la tige de maintien de l'art antérieur, tout en conservant une bonne stabilité verticale de la résistance stéatite, même à haute température.The lightening of the heating elements according to the invention and their angular offset which allows cooperation with the stepwise bending of the conductive wire makes it possible to eliminate the holding rod of the prior art, while maintaining a good vertical stability of the steatite resistance. , even at high temperatures.

L'invention décrite en référence à un mode de réalisation particulier n'y est nullement limitée, mais couvre au contraire toute modification de forme et toute variante de réalisation couverte par les revendications.The invention described with reference to a particular embodiment is not limited thereto, but on the contrary covers any modification of form and any variant embodiment covered by the claims.

Ainsi, l'évidement central peut être cylindrique ou adopter toute autre conformation géométrique, l'essentiel étant d'obtenir un allégement de l'ordre d'un tiers par rapport à l'art antérieur tout en conservant les caractéristiques mécaniques et diélectriques à haute température de l'art antérieur.Thus, the central recess may be cylindrical or adopt any other geometric conformation, the essential being to obtain a reduction of the order of one third compared to the prior art while retaining the mechanical and dielectric characteristics at high temperature of the prior art.

Claims (6)

  1. Heating element constituted by an assembly of insulating elements and a connection head made of insulating material,
    wherein each insulating element (5), which is commonly known as a "barrel", is made of a ceramic material, in particular steatite, and has:
    - a central recess (13) which provides central lightening of the insulating element (5), with a first diameter;
    - a plurality of longitudinal receptacles (8) with a second diameter, for coiled or twisted conductor wires, the said longitudinal receptacles (8) being separated regularly by space bars (9);
    - and at each end means (10, 11) for indexing in rotation of the insulating element (5) relative to a following insulating element (5), such as to provide angular offsetting between successive insulating elements, whilst assuring locking in translation of the conductor wire,
    the said heating element being constituted by fitting of coiled or twisted conductor wires on an alignment of a connection head (6) made of insulating materials and a plurality of insulating elements (5a, 5b, 5c, 5d) in successive longitudinal receptacles (8);
    characterised in that the said first diameter is twice as large as the value of the said second diameter; in that each insulating element (5) comprises at each end conductive wire passages (12) which make a longitudinal receptacle (8) of an insulating element (5) communicate with an angularly offset longitudinal receptacle (8) of another insulating element (5), in order to obtain bending in the form of a staircase of the conductor wire, which, in co-operation with the lightening of the heating elements and their angular offsetting, makes it possible to eliminate the retention rod.
  2. Heating element according to claim 1, characterised in that each insulating element (5) has a cylindrical form comprising two positioning lugs (10) and two receptacles (11) to receive a positioning lug (10), such as to align the insulating elements (5) with a predetermined angular offsetting.
  3. Heating element according to claim 2, characterised in that the positioning lugs (10) and the receptacles (11) for receipt are angularly offset and arranged on both sides of the central recess (13).
  4. Heating element according to either of claims 2 or 3, characterised in that the angular offsetting is equal to half the angle defined by two successive longitudinal receptacles (8).
  5. Heating element according to claim 1, characterised in that the connection head (6) made of insulating material has a peripheral shoulder (7) which is designed to co-operate with a circlip or an equivalent peripheral locking means, in order to assure the vertical retention of the heating element.
  6. Heating element according to claim 1, characterised in that the ends of these conductive wires are directly crimped or assembled on conductors which are connected to a thermostat, such as to avoid the use of terminals, nuts, connectors, or other auxiliary connection means.
EP05291461A 2004-07-23 2005-07-06 Insulating element Active EP1619932B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05291461T PL1619932T3 (en) 2004-07-23 2005-07-06 Insulating element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0408163A FR2873534B1 (en) 2004-07-23 2004-07-23 INSULATING ELEMENT

Publications (3)

Publication Number Publication Date
EP1619932A2 EP1619932A2 (en) 2006-01-25
EP1619932A3 EP1619932A3 (en) 2007-04-25
EP1619932B1 true EP1619932B1 (en) 2009-12-02

Family

ID=34948738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05291461A Active EP1619932B1 (en) 2004-07-23 2005-07-06 Insulating element

Country Status (8)

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EP (1) EP1619932B1 (en)
AT (1) ATE451001T1 (en)
DE (1) DE602005017986D1 (en)
DK (1) DK1619932T3 (en)
ES (1) ES2337371T3 (en)
FR (1) FR2873534B1 (en)
PL (1) PL1619932T3 (en)
PT (1) PT1619932E (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2908953B1 (en) * 2006-11-17 2009-01-23 Atlantic Ind Soc Par Actions S "METHOD OF MANUFACTURING HEATING ELEMENTS, INSULATING ELEMENTS AND CORRESPONDING RESISTORS"
FR3007828B1 (en) * 2013-07-01 2017-12-08 Atlantic Industrie Sas HEATING ELEMENT AND WATER HEATER HAVING SUCH A HEATING ELEMENT

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1670437A (en) * 1926-04-08 1928-05-22 Moll Mfg Company Electrically-heated steam boiler
CH138266A (en) * 1929-04-30 1930-02-28 Maxim A G Fabrik Fuer Thermo E Electric rod heating element.
US3839623A (en) * 1973-08-30 1974-10-01 Watlow Electric Mfg Co Electric heater with add-on leads
DE2548085A1 (en) * 1975-10-28 1977-05-05 Draloric Electronic Electrical resistor wound on cylindrical former - has sinusoidal longitudinal waves on outer surface with terminal rings at ends
US4621251A (en) * 1985-03-28 1986-11-04 North American Philips Corp. Electric resistance heater assembly
US4667086A (en) * 1985-10-21 1987-05-19 North American Philips Corp. Heater element for blow dryers, paint strippers and the like
US5034595A (en) * 1990-05-09 1991-07-23 Ogden Manufacturing Co. Cartridge heater assembly
US6118934A (en) * 1997-11-14 2000-09-12 Tseng; Chuan-Tseng Safety protection structure for aquarium heater

Also Published As

Publication number Publication date
EP1619932A3 (en) 2007-04-25
ATE451001T1 (en) 2009-12-15
DE602005017986D1 (en) 2010-01-14
ES2337371T3 (en) 2010-04-23
DK1619932T3 (en) 2010-04-12
PT1619932E (en) 2010-03-05
FR2873534A1 (en) 2006-01-27
EP1619932A2 (en) 2006-01-25
FR2873534B1 (en) 2006-11-17
PL1619932T3 (en) 2010-07-30

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