EP1581028A1 - Heizelement - Google Patents

Heizelement Download PDF

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Publication number
EP1581028A1
EP1581028A1 EP05356048A EP05356048A EP1581028A1 EP 1581028 A1 EP1581028 A1 EP 1581028A1 EP 05356048 A EP05356048 A EP 05356048A EP 05356048 A EP05356048 A EP 05356048A EP 1581028 A1 EP1581028 A1 EP 1581028A1
Authority
EP
European Patent Office
Prior art keywords
heating element
bead
tube
visual code
resin
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.)
Withdrawn
Application number
EP05356048A
Other languages
English (en)
French (fr)
Inventor
Michel Sasso
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
Application filed by SEB SA filed Critical SEB SA
Publication of EP1581028A1 publication Critical patent/EP1581028A1/de
Withdrawn legal-status Critical Current

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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
    • H05B3/40—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

Definitions

  • the present invention relates to the field of heating elements able to equip household appliances and aims more particularly at simplification of their manufacture.
  • the heating elements concerned by the present invention are commonly referred to as "shielded” heating elements, their structure a metal tube inside which is housed a resistant wire surrounded by magnesia. Capping beads close the heating element.
  • a step overmolding with a resin or a silicone is generally performed.
  • Such elements are common in home appliances. kettle-type heating, home appliances, grills, fryers, where wish to be able to clean under water the heating element, or even to clean it by dishwasher safe
  • the present invention aims in particular at simplifying the recognition such heating elements. Indeed, in order to present different powers and be satisfied with different supply voltages depending on the country, nature and the characteristics of the resistive wire housed inside the tube can strongly vary without the external dimensions of the heating element being changed.
  • the sealing operation is an operation which is generally performed outside the method of producing the element heating itself. Therefore, risks of manipulation error and permutations between the heating elements can lead to serious consequences for the future use of these elements.
  • the present invention aims to remedy these drawbacks by proposing a heating element comprising a metal tube inside which is housed a set consisting of a resistant wire, surrounded by magnesia, and two connection terminals connected to the resistant wire, the tube being plugged, at least one of its ends, by an insulating pearl through which passes one of the connection terminals, said bead being held mechanically or by gluing in this position, said heating element having a overmoulding, by a resin, the end of the tube comprising the bead, said overmoulding including a lateral portion of the tube, as well as a portion of the Incoming connection terminal, characterized in that the bead carries a code distinctive visual identity to identify electrical characteristics and / or of use of the heating element, and that the resin is translucent or transparent to allow observation and recognition of the code visual once the overmolding done.
  • the present invention proposes to identify the characteristics electrical components of the heating element at the time of its elaboration, on at least a bead and then seal the end of the heating element to using a translucent or transparent resin in order to be able to through capping, the identification made on the pearl and therefore the electrical characteristics of the heating element.
  • the resin used is a silicone which has a simplicity of implementation and mechanical strength in temperature.
  • the silicone will be of the pumpable liquid silicone or LSR type (Liquid Silicon Rubber), which has the advantage of easier formatting to be controlled and automated by the low viscosity presented by this silicone.
  • LSR Liquid Silicon Rubber
  • the present invention will preferably be applied to elements heated metal tube of aluminum or stainless steel, low cost.
  • the visual code used is the color of at least one of the pearls.
  • a color code can easily be put in place, such as the code color for electrical resistors, in order to define the characteristics electric heating element.
  • a variant may consist of several associated color bands. It is also conceivable to associate the two ends of the heating element, which allows, from a number determined colors, to increase the possibilities of codification.
  • the insulating bead opens at the end of the tube, the resin then encompassing this opening portion of pearl.
  • the wall of the tube has openings facing the pearl, the resin encompassing these openings which constitute windows of distinction of the visual code used.
  • the visual code consists of a marking by a distinctive sign of the pearl, this which can offer more possibility of more important signaling. It could be here a symbol, a lettering system or a code that must be sufficiently visible to be recognized through the silicone wall.
  • the pearl bearing the visual code is a pearl ceramic which has good insulating and holding characteristics temperature.
  • the characteristics associated with the visual code are the supply voltage of the heating elements and the power generated by the heating element when is powered under this voltage. These two characteristics are the fundamental characteristics of a heating element.
  • a heating element 1 according to the art front includes a metal tube 2 inside which is housed a wire resistant 4 surrounded by an insulator 8 such as magnesia. At the end of the element heating is housed a pearl 10 having a shoulder 14 to take support on the physical end 12 of the tube. The pearl 10 is crossed by a connector 6 in connection with the resistant wire 4, for example by a link between the end of the connector and the end of the resistant wire 4.
  • the manufacture of the heating element is then completed relative to industrial tools needed.
  • heating elements are rendered watertight, essentially by the realization of an overmoulding 16 based on a resin silicone type plastic including the pearl and resting on the edges of the tube 2, the silicone is then tinted to identify the electrical characteristics of the heating element by a color code.
  • the present invention makes it possible to avoid this large problem by proposing, on the basis of the same structure of the element 21, to identify the electrical characteristics of said heating element what are the supply voltage and the power of the heating element, when steps of manufacturing said heating element which comprise, in any way, at a given moment, a control of the electrical characteristics of item.
  • the sealing beads of the heating element that carry the information of the electrical characteristics of the heating element.
  • This information can be a color code or a sign distinctive.
  • a translucent or transparent material is used when the overmolding operation so that the color code can be identified by the operator 20 through said overmoulding 36.
  • the bead resting on the end of the tube 2, the portion 34 emerging from the tube can therefore be identified, either by observing the bead axially, but also laterally.
  • Color bands can also increase the possibilities of codification.
  • FIGS. 3 and 4 show two variants of implementation of the invention.
  • the heating element 41 comprises a tube 42 whose the end has a shoulder 54 for holding the bead 50.
  • the bead is held inside the tube.
  • the transparency of the coating 56 may indeed be sufficient so that there is no need for arrange the bead by a shoulder on the end of the tube to identify the visual code laterally on the side of the tube by the emerging part of the pearl.
  • FIG. 4 presents another variant of embodiment which can be used in addition to the embodiments already presented.
  • the metal tube 62 of the heating element 61 has punctual openings 74 at the bead 70 capping, these openings constituting viewing windows of said bead 70.
  • the overmoulding 76 then covers these openings to ensure the watertightness of the heating element.
  • any distinctive sign can be used on the pearl of capping for identification, such as alphanumeric coding, drawing, a specific brand.
  • any overmolding process known in the field may be suitable to the present invention, insofar as it does not distort the quality of transparency or translucency of the material used, or requires, for overmoulding needs, specific additives that would cause loss of quality to the material.
EP05356048A 2004-03-24 2005-03-17 Heizelement Withdrawn EP1581028A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0403021 2004-03-24
FR0403021A FR2868238B1 (fr) 2004-03-24 2004-03-24 Element chauffant

Publications (1)

Publication Number Publication Date
EP1581028A1 true EP1581028A1 (de) 2005-09-28

Family

ID=34855153

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05356048A Withdrawn EP1581028A1 (de) 2004-03-24 2005-03-17 Heizelement

Country Status (2)

Country Link
EP (1) EP1581028A1 (de)
FR (1) FR2868238B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104678172A (zh) * 2013-11-27 2015-06-03 浙江金徕镀膜有限公司 加热管中绝缘介质的绝缘电阻测量方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19516080A1 (de) * 1995-05-03 1996-11-07 Ego Elektro Blanc & Fischer Feuchtedichte Rohrendenversiegelung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021518B (de) * 1954-04-07 1957-12-27 Voigt & Haeffner Ag Elektrischer Rohrheizkoerper grosser Leistung
DE1276838B (de) * 1963-04-05 1968-09-05 Licentia Gmbh Elektrischer Mantelrohrheizstab fuer Hochspannung
DE1565337B1 (de) * 1964-09-28 1970-10-22 Bleckmann & Co Rohrheizkoerper und Verfahren zu seiner Herstellung
DE3400160A1 (de) * 1984-01-04 1985-07-11 Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden Verfahren zur herstellung eines rohrheizkoerperabschlusses
US5034595A (en) * 1990-05-09 1991-07-23 Ogden Manufacturing Co. Cartridge heater assembly
DE19613346A1 (de) * 1996-04-03 1997-10-09 Ego Elektro Blanc & Fischer Thermische Arbeitseinheit, insbesondere Rohrheizkörper
FR2830163B1 (fr) * 2001-09-21 2004-08-27 Seb Sa Procede de fabrication d'elements chauffants

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19516080A1 (de) * 1995-05-03 1996-11-07 Ego Elektro Blanc & Fischer Feuchtedichte Rohrendenversiegelung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104678172A (zh) * 2013-11-27 2015-06-03 浙江金徕镀膜有限公司 加热管中绝缘介质的绝缘电阻测量方法

Also Published As

Publication number Publication date
FR2868238B1 (fr) 2006-05-05
FR2868238A1 (fr) 2005-09-30

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