EP1619932A2 - Insulating element - Google Patents

Insulating element Download PDF

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Publication number
EP1619932A2
EP1619932A2 EP05291461A EP05291461A EP1619932A2 EP 1619932 A2 EP1619932 A2 EP 1619932A2 EP 05291461 A EP05291461 A EP 05291461A EP 05291461 A EP05291461 A EP 05291461A EP 1619932 A2 EP1619932 A2 EP 1619932A2
Authority
EP
European Patent Office
Prior art keywords
insulating element
insulating
characterized
heating
element according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05291461A
Other languages
German (de)
French (fr)
Other versions
EP1619932B1 (en
EP1619932A3 (en
Inventor
Dominique Soulard
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.)
Atlantic Industrie SAS
Atlantic Industries Inc
Original Assignee
Atlantic Industrie SAS
Atlantic Industries Inc
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 to FR0408163A priority Critical patent/FR2873534B1/en
Application filed by Atlantic Industrie SAS, Atlantic Industries Inc filed Critical Atlantic Industrie SAS
Publication of EP1619932A2 publication Critical patent/EP1619932A2/en
Publication of EP1619932A3 publication Critical patent/EP1619932A3/en
Application granted granted Critical
Publication of EP1619932B1 publication Critical patent/EP1619932B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B3/00Ohmic-resistance heating
    • H05B3/40Heating elements having the shape of rods or tubes
    • H05B3/42Heating elements having the shape of rods or tubes non-flexible
    • H05B3/46Heating elements having the shape of rods or tubes non-flexible heating conductor mounted on insulating base

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

  • 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".
  • The assembled assembly is held in position by a central fixing and holding rod, and is then locked in position.
  • 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.
  • 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.
  • 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 subject of the invention is an insulating element for the manufacture of heating elements constituted by mounting conductive wires on at least one elongated body made of insulating material, characterized in that the insulating element has a central recess providing relief of the insulation. insulation element greater than ten percent, while maintaining the mechanical and dielectric characteristics of the insulating element at high temperature.
  • According to other alternative features of the invention
    • the insulating element has at each end means for indexing in rotation of the insulating element with respect to a subsequent insulating element, so as to achieve an angular offset between successive insulators ensuring translation locking of the conductive wire.
    • 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.
  • The invention also relates to a heating element consisting of assembling insulating elements according to the invention and a connecting head of insulating material.
  • 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.
  • The invention will be better understood from the following description given by way of nonlimiting example with reference to the accompanying drawings in which:
    • Figure 1 schematically shows a perspective view partially broken away of a heating assembly for an electric water heater.
    • FIG. 2 schematically represents a perspective view of a heating element according to the invention, in which the conducting wires are not represented.
    • Figure 3 schematically shows two perspective views at two different angles of the two ends of an insulating member according to the invention.
  • With reference to FIG. 1, a heating assembly intended to be mounted on an electric water heater tank comprises a sheath 1 made of enamelled metal, a flange 2 forming a cover, and a bundle 3 of insulated conductors connected to a steatite resistor comprising a alignment of insulating elements 5a, 6 on which is mounted conductor wire generally twisted and intended to be heated to high temperature.
  • 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.
  • 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.
  • 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.
  • Referring to 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.
  • 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.
  • 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.
  • 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 maintenance of the steatite resistance inside the enamelled sheath 1 described with reference to FIG. .
  • 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.
  • 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.
  • Thanks to the invention, 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.
  • With reference to FIG. 3, an insulating element according to the invention has at one end indexing means 10 situated 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.
  • 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 FIG.
  • 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.
  • 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.
  • 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.
  • 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 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 within the scope and spirit of the invention.
  • 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 (9)

  1. Insulating element (5) for the manufacture of heating elements consisting of mounting conductors son on at least one elongate body of insulating material, characterized in that the insulating element (5) has a central recess (13) providing relief of the insulating element (5) greater than ten percent, while maintaining the mechanical and dielectric characteristics of the insulating element at high temperature.
  2. Insulating element according to Claim 1, characterized in that the insulating element (5) has at each end means for indexing (10, 11) in rotation of the insulating element (5) with respect to an insulating element ( 5) according to, so as to achieve an angular offset between successive insulators, while providing locking in translation of the conductive wire.
  3. Insulating element according to Claim 1 or Claim 2, characterized in that the insulating element (5) has a cylindrical conformation comprising two locating lugs (10) and two lug receiving receptacles (10) of positioning, so as to align the insulating elements (5) with a predetermined angular offset.
  4. Insulating element according to Claim 3, characterized in that the positioning lugs (10) and the receiving receptacles (11) are angularly offset and arranged on either side of the central recess (13).
  5. Insulating element according to any one of the preceding claims, characterized in that the insulating element (5) has at each end passages (12) of conductive wire communicating a longitudinal housing (8) of an insulating element (5). ) with a longitudinal housing (8) angularly offset from another insulating element (5).
  6. Insulating element according to any one of claims 2 to 5, characterized in that the angular offset is equal to half the angle defined by two recesses (8) longitudinal successive.
  7. Heating element constituted by assembly of insulating elements (5) according to any one of the preceding claims and a connecting head (6) of insulating material.
  8. Heating element according to claim 7, wherein ends of the conductive wires are connected to a heating thermostat, characterized in that the ends of the conductive wires are directly crimped or assembled to the conductors connected to the thermostat, so as to avoid the use terminals, nuts, lugs or other auxiliary means of connection.
  9. Heating element according to claim 7 or claim 8, characterized in that the connecting head (6) of insulating material has a peripheral shoulder (7) intended to cooperate with a circlip or equivalent means of peripheral locking, to ensure the maintenance vertical heating element.
EP05291461A 2004-07-23 2005-07-06 Insulating element Active EP1619932B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0408163A FR2873534B1 (en) 2004-07-23 2004-07-23 Insulating element

Applications Claiming Priority (1)

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

Publications (3)

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

Country Link
EP (1) EP1619932B1 (en)
AT (1) AT451001T (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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1924126A1 (en) * 2006-11-17 2008-05-21 Atlantic Industrie Method of producing heating elements, insulating members and resistors
FR3007828A1 (en) * 2013-07-01 2015-01-02 Atlantic Industrie Sas Heating element and water heater having such a heating element

Citations (2)

* 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 bar heater.

Family Cites Families (6)

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

Patent Citations (2)

* 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 bar heater.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1924126A1 (en) * 2006-11-17 2008-05-21 Atlantic Industrie Method of producing heating elements, insulating members and resistors
FR2908953A1 (en) * 2006-11-17 2008-05-23 Atlantic Ind Soc Par Actions S "method of manufacturing heating elements, insulating elements and corresponding resistors"
FR3007828A1 (en) * 2013-07-01 2015-01-02 Atlantic Industrie Sas Heating element and water heater having such a heating element

Also Published As

Publication number Publication date
EP1619932B1 (en) 2009-12-02
ES2337371T3 (en) 2010-04-23
PL1619932T3 (en) 2010-07-30
PT1619932E (en) 2010-03-05
FR2873534A1 (en) 2006-01-27
EP1619932A3 (en) 2007-04-25
FR2873534B1 (en) 2006-11-17
DK1619932T3 (en) 2010-04-12
AT451001T (en) 2009-12-15
DE602005017986D1 (en) 2010-01-14

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