EP0891118A1 - Heizelement und Haushaltgerat, insbesonderes Dampfbügeleisen, mit ein solches Element - Google Patents

Heizelement und Haushaltgerat, insbesonderes Dampfbügeleisen, mit ein solches Element Download PDF

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Publication number
EP0891118A1
EP0891118A1 EP98401731A EP98401731A EP0891118A1 EP 0891118 A1 EP0891118 A1 EP 0891118A1 EP 98401731 A EP98401731 A EP 98401731A EP 98401731 A EP98401731 A EP 98401731A EP 0891118 A1 EP0891118 A1 EP 0891118A1
Authority
EP
European Patent Office
Prior art keywords
heating element
layer
resistive
ceramic
circuit
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
EP98401731A
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English (en)
French (fr)
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EP0891118B1 (de
Inventor
Eliette Rosell-Laclau
Dominique Gelus
Jean-Pierre Debourg
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
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Publication date
Application filed by SEB SA filed Critical SEB SA
Publication of EP0891118A1 publication Critical patent/EP0891118A1/de
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Publication of EP0891118B1 publication Critical patent/EP0891118B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • H05B3/265—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an inorganic material, e.g. ceramic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/24—Arrangements of the heating means within the iron; Arrangements for distributing, conducting or storing the heat

Definitions

  • the present invention relates to an element heating, of the type constituted by a resistive circuit capable of being crossed by an electric current and thermal bond with the internal part of a plate conductive of heat, through electrically insulating means.
  • Such a heating element is generally flat and it is reported on the conductive plate by all connecting means, such as for example by bonding.
  • the invention applies in particular, but not exclusively for household appliances such as irons in general, whether steam or not, fryers, or grilling appliances, etc ... fact, the invention can be applied to any device intended to operate in a humid environment in permanently or occasionally.
  • the invention is therefore susceptible of applications in a very large field, but an application preferential concerns its integration in an iron iron with steam or dry type.
  • the invention also relates to a iron provided with such a heating element.
  • the major difficulty in this type of device domestic using steam or operating in humid environment consists in achieving isolation electrical between the electrical resistive circuit heater and the heat conducting plate to exploit in one way or another.
  • the European patent application No. 0.555.159 filed by the plaintiff, describes a heating element intended in particular for an iron and made according to a sandwich structure inserting a resistive heating element, embedded in a resin thermoplastic and delimited on either side of its upper and lower sides by two sheets of electrical insulating coating, themselves receiving on either side of their outer faces a layer of thermoplastic resin, constituting means of insulating connection with rigid elements, one at less forms a heating plate.
  • the different constituent layers of such heating element are linked together by fusing.
  • a heating element of the type described in the above-mentioned European patent application present the disadvantage of requiring a manufacturing process heavy and expensive with expensive materials and whose operating temperature limit is relatively close to operating temperature of the device.
  • the aforementioned heating elements do not adapt well to the fact that the heating parts subjected to an electrical voltage are too close accessible edges of the spray orifices, when it comes to steam irons. Indeed, the current leakage lines are too short and this aspect therefore limits the number of steam possible.
  • WO-93/02533 discloses an element electric heater, especially usable in an iron ironing board, essentially comprising a plate of metal base coated with a dielectric glass ceramic, on which a track is placed electrical resistive in a material containing platinum.
  • the resistive track is itself covered of a dielectric material.
  • the present invention aims to remedy the disadvantages of a heating element entering the structure of a household appliance likely to be used in a humid environment.
  • such a heating element aims to provide a heating structure allowing good distribute the heat over the entire surface of the means of electrically insulating connection, and very quickly.
  • the heating element of the invention can also be particularly simple and present improved insulation characteristics, for a reduced manufacturing cost.
  • the invention relates to an element heater intended in particular for an iron, type constituted by a resistive circuit able to be crossed by an electric current and in connection thermal with the internal part of a plate heat conductive or sole, by through electrically insulating means, the resistive circuit being a thin layer and the means electrically insulating being constituted by a layer ceramic of which an upper face receives the circuit resistive and of which a lower face is in connection with the inner part of the sole.
  • the thin layer constituting the resistive circuit is divided into conductive strips, parallel to each other and distributed to cover any the surface of the ceramic layer by providing a constant surface power.
  • the heat is very quickly distributed over the entire surface of the ceramic layer.
  • the resistive circuit can have a very wide low, which further improves the regularity of the heater.
  • the present invention also relates to characteristics that will emerge during the description which will follow and which should be considered in isolation or according to all their possible technical combinations.
  • the heating element 1 shown in the figures is more particularly suitable for an iron with steam.
  • the heating element consists of a circuit resistive 2 able to be crossed by a current electrical and in thermal connection with the part internal of a heat conducting plate, in the occurrence of an iron soleplate 3, this connection made by means electrically insulating.
  • These electrically insulating means are made up by a ceramic layer 4 including an upper face 4a receives resistive circuit 2 and one side of which lower 4b is in connection with the internal part 3a of the sole 3.
  • the ceramic plate 4 is made directly on the internal face 3a of the sole 3 which it covers. This ceramic insulating layer is obtained by firing thick sprayed and dried slip less than 0.5 mm.
  • a thin layer conductive metal oxide preferably of tin oxide, from a precursor essentially composed of a chloride solution tin and a dopant, for example fluoride ammonium.
  • Thin layers of tin oxide can have a thickness of 0.05 ⁇ m to 0.5 ⁇ m. They are then transparent. In these thicknesses, the lowest resistance values are of the order of 20 ⁇ / cm 2 . In the present case, since transparency does not matter, it is possible to deposit greater thicknesses, preferably between 1 and 10 ⁇ m, and thus obtain resistances of the order of ⁇ / cm 2 .
  • the “Pyrosol” deposition technique is based on the thermal decomposition of fine droplets.
  • One of interests of this method lies in the mode obtaining the aerosol which gives it properties particular finesse and homogeneity of the droplet size.
  • the principle consists in cause a liquid to burst under the action of a ultrasonic pressure.
  • the implementation of the process “Pyrosol” implies the choice of three constituents: source compound, solvent and carrier gas, compatible with each other, and with the substrate on which the deposit must be made.
  • the process differs from conventional chemical vapor deposition "CVD” by the mode of transport of the reaction product. After evaporation of the latter, film formation is the result of a gas-solid reaction. As in “CVD", the active species reacts in the adsorbed phase and reaction products are desorbed later.
  • the conductive deposit of tin oxide can be carried out from tin chloride, preferably SnCl 4 dissolved in a solvent, preferably ethanol or methanol.
  • a solvent preferably ethanol or methanol.
  • the fluorine or antimony dopants are added from ammonium fluoride (NH 4 F) for fluorine and antimony chloride (SbCl 3 ) for antimony.
  • NH 4 F ammonium fluoride
  • SBCl 3 antimony chloride
  • the SnCl 4 concentration is preferably between 0.1 and 0.8 mol / l and the temperature of the substrate during deposition is between 300 and 500 ° C.
  • the thin conductive layer is produced from zinc oxides.
  • the precursors used can then be zinc chloride (ZnCl 2 ) or zinc acetate ((Zn (C 2 H 3 O 2 ) 2 ).
  • the solvent used can be a mixture of water and ethanol or methanol and the addition of a dopant, preferably indium, in the form of indium chloride.
  • the conductive layer thin is made from organometallic.
  • the thin layer constituting the resistive circuit 2 is divided into conductive strips 5, parallel between them, and distributed to cover the entire surface of the ceramic layer 4 and consequently that of the sole 3, to provide a constant pfd.
  • Conductive strips 5 of the thin layer constituting the resistive circuit 2 are obtained by chemical etching or masking.
  • the conductive strips 5 are interconnected via connections 7.
  • the element heating (not shown), it is made up of from a metal plate on which are successively arranged the ceramic layer 4 and the resistive circuit 2 to form a subset separate to report on the internal part 3a of the sole 3.
  • resistive circuit 2, 2A, 2B both with regard to the realization of the resistive circuit 2, 2A, 2B or in what relates to the way of bringing back the ceramic layer 4, 4A, 4B on the internal wall 3a of the sole 3, said resistive circuits 2, 2A, 2B are covered by a second insulating layer 14 (FIG. 1), so that build a limited sandwich structure externally, on the one hand, by the ceramic layer 4, 4A, 4B and, on the other hand, by said second layer insulator 14, between which the element is inserted resistive 2, 2A, 2B.
  • a second insulating layer 14 FIG. 1
  • the second insulating layer 14 is also a ceramic layer.
  • the deposition of the insulating layer 14 is preferably obtained by baking a slip sprayed with a lower melting temperature to that of the ceramic layer 4, 4A, 4B.
  • the heating element 1 which has just been described is intended to equip a household appliance, more particularly a steam iron whose ironing sole 3 has holes 15 in passage of steam from a vaporization (not shown).
  • the resistive circuit 2, 2A, 2B bypasses the orifices 15 for the passage of steam at a distance predetermined, so as to allow the second insulating layer 14 to be intimately linked to the zones free from ceramic layer 4, 4A, 4B, no covered by the resistive circuit 2, 2A, 2B and in particular around the orifices 15 for passage of the steam, in order to obtain electrical isolation from them.
  • the resistive circuit 2 constituted by the strips conductive 5 bypasses the orifices 15 for passage of vapor, at a relatively small distance which is less than 3 mm. Being able to approach the closer to the orifices 15, by the resistive circuit 2, 2A, 2B, allows to limit the unheated zones, without however create lines of flight. this allows increase the number of orifices 15 while keeping a sufficient heated area.
  • the free zones a, b, c, d, e, f, g, h of the ceramic layer 4 not covered by the circuit resistive 2 are intended to be in intimate connection with the second insulating layer 14 (not shown in the figure 2).
  • the heating element 1 is previously attached to a stainless steel plate, itself stuck on a sole 3 of polished or enameled aluminum, for example through a silicone adhesive.
  • the stainless steel plate is flat and raised on its outline in order to give it stiffness while by helping to improve the aesthetics of the whole.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Cookers (AREA)
  • Resistance Heating (AREA)
EP98401731A 1997-07-10 1998-07-08 Heizelement und Haushaltgerät, insbesonderes Dampfbügeleisen, mit einem solchen Element und Verfahren zur Herstellung des Dampfbügeleisens Expired - Fee Related EP0891118B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9708804 1997-07-10
FR9708804A FR2766047B1 (fr) 1997-07-10 1997-07-10 Element chauffant et appareil electromenager, notamment fer a repasser a vapeur, comportant un tel element

Publications (2)

Publication Number Publication Date
EP0891118A1 true EP0891118A1 (de) 1999-01-13
EP0891118B1 EP0891118B1 (de) 2002-09-18

Family

ID=9509109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401731A Expired - Fee Related EP0891118B1 (de) 1997-07-10 1998-07-08 Heizelement und Haushaltgerät, insbesonderes Dampfbügeleisen, mit einem solchen Element und Verfahren zur Herstellung des Dampfbügeleisens

Country Status (5)

Country Link
EP (1) EP0891118B1 (de)
AT (1) ATE224630T1 (de)
DE (1) DE69807995T2 (de)
ES (1) ES2181140T3 (de)
FR (1) FR2766047B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2437283A (en) * 2006-04-22 2007-10-24 Richards Morphy N I Ltd Steam iron
US7797863B2 (en) 2006-01-31 2010-09-21 Celaya, Emparanza Y Galdos, Internacional, S.A. Iron sole and iron containing same
US20120061372A1 (en) * 2009-05-22 2012-03-15 Morphy Richards Limited Iron

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA159445S (en) 2014-09-26 2015-06-09 Richards Morphy N I Ltd Iron

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299089B (de) * 1964-02-24 1969-07-10 Richards Morphy N I Ltd Heizeinheit fuer elektrisches Buegeleisen
FR2189562A1 (de) * 1972-06-20 1974-01-25 Zarzecki Jean
DE2534813A1 (de) * 1975-08-05 1977-02-10 Braun Ag Verfahren zur herstellung einer heizvorrichtung fuer haushaltsgeraete und geraete des persoenlichen bedarfs
EP0158779A1 (de) * 1984-03-17 1985-10-23 ROBERT KRUPS STIFTUNG & CO. KG. Heizkörper für Haushaltsgeräte
WO1993002533A1 (en) * 1991-07-23 1993-02-04 Global Domestic Products Limited Electrical heating elements

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299089B (de) * 1964-02-24 1969-07-10 Richards Morphy N I Ltd Heizeinheit fuer elektrisches Buegeleisen
FR2189562A1 (de) * 1972-06-20 1974-01-25 Zarzecki Jean
DE2534813A1 (de) * 1975-08-05 1977-02-10 Braun Ag Verfahren zur herstellung einer heizvorrichtung fuer haushaltsgeraete und geraete des persoenlichen bedarfs
EP0158779A1 (de) * 1984-03-17 1985-10-23 ROBERT KRUPS STIFTUNG & CO. KG. Heizkörper für Haushaltsgeräte
WO1993002533A1 (en) * 1991-07-23 1993-02-04 Global Domestic Products Limited Electrical heating elements

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7797863B2 (en) 2006-01-31 2010-09-21 Celaya, Emparanza Y Galdos, Internacional, S.A. Iron sole and iron containing same
GB2437283A (en) * 2006-04-22 2007-10-24 Richards Morphy N I Ltd Steam iron
US20120061372A1 (en) * 2009-05-22 2012-03-15 Morphy Richards Limited Iron
US9499935B2 (en) * 2009-05-22 2016-11-22 Morphy Richards Limited Iron

Also Published As

Publication number Publication date
ES2181140T3 (es) 2003-02-16
FR2766047B1 (fr) 1999-09-24
DE69807995T2 (de) 2003-07-31
EP0891118B1 (de) 2002-09-18
FR2766047A1 (fr) 1999-01-15
ATE224630T1 (de) 2002-10-15
DE69807995D1 (de) 2002-10-24

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