EP1750484A1 - Ruban chauffant pour appareil de chauffage électrique, appareil de chauffage avec un tel ruban chauffant et procédé de fabrication du ruban chauffant - Google Patents

Ruban chauffant pour appareil de chauffage électrique, appareil de chauffage avec un tel ruban chauffant et procédé de fabrication du ruban chauffant Download PDF

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Publication number
EP1750484A1
EP1750484A1 EP06013809A EP06013809A EP1750484A1 EP 1750484 A1 EP1750484 A1 EP 1750484A1 EP 06013809 A EP06013809 A EP 06013809A EP 06013809 A EP06013809 A EP 06013809A EP 1750484 A1 EP1750484 A1 EP 1750484A1
Authority
EP
European Patent Office
Prior art keywords
heating tape
heating
fastening elements
starting material
strip
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Withdrawn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
EP06013809A
Other languages
German (de)
English (en)
Inventor
Josef Reithofer
Christian Dipl.-Ing. Auradnik
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.)
Electrovac AG
Original Assignee
Electrovac AG
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 Electrovac AG filed Critical Electrovac AG
Publication of EP1750484A1 publication Critical patent/EP1750484A1/fr
Withdrawn legal-status Critical Current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
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • 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
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/032—Heaters specially adapted for heating by radiation heating

Definitions

  • the invention relates to a heating tape according to the preamble of claim 1, to a heater (also heating module) according to the preamble of claim 9 and to a method according to the preamble of claim 11.
  • Electric heaters and especially those for use for electric heating plates, in particular for glass ceramic plates are known in various designs.
  • the heating tape is made of a starting material, which consists of a suitable for electrical heating elements thin band-shaped metal sheet, integrally formed with the fastening elements so that they protrude over a common longitudinal side extending over the entire heating tape length band-shaped resistor portion of the heating tape.
  • the production takes place by appropriate cutting of the strip-shaped starting material on a longitudinal side in the form that the fasteners are obtained or cut free in this cutting. Thereafter, in the known case, a permanent profiling of the heating tape in the form that this is sinusoidal corrugated in its longitudinal extent. A large part of the successive in the course of the heating tape fasteners is then each at least a reversal region of this corrugation and thus has a reverse sections corresponding profile.
  • the known heating tape has significant disadvantages.
  • its fastening elements are provided in the course of the heating tape at a relatively large distance from each other to during operation of the heater by elastic Deformation of the heating band to allow compensation of stresses resulting from different length expansions of the material of the body and the heating tape and without such compensation for damage to the body and in particular can lead to a loosening of the connection between the heating tape and body.
  • the invention has for its object to provide a heating tape which avoids the disadvantages of the prior art, in particular during operation of the heater ensures a uniform optical glow pattern, with improved lifetime and minimizing caused by different thermal expansion thermal stresses.
  • a heating tape according to the patent claim 1 is formed.
  • a heater or heating module is the subject of claim 9.
  • a method for producing the heating tape is the subject of claim 11.
  • the heating tape according to the invention made of a thin metallic sheet material (metal sheet) is profiled zig-zag-shaped, ie lying in the plane of the sheet lying and transverse or perpendicular to the course of the heating tape oriented axes often zig-zag-shaped permanently angled, preferably each with plan or substantially plan leg portions between the bends and the reverse portions of the zig-zag-shaped profiling.
  • the Material thickness of the metallic sheet or the heating tape is for example in the range of 0.04mm to 0.1mm.
  • the generally designated 1 in the figures electrical heater consists in a conventional manner from a cup-like, open at the top of base 2 and a heating tape 3, which is arranged edgewise on the bottom 4.1 of the recess 4 of the body 2, in one Course with a plurality of turns, so that the heating tape 3 extends as evenly as possible over the entire surface of the example circular bottom 4.1 and during operation of the heater 1 over the effective heating surface as uniform as possible distribution of the heating power is reached.
  • a plate 5 forming the hob of an electric range of a heat-resistant electrically insulating material, such as glass-ceramic closed.
  • the main body 2 consists of an inner, cup-shaped and the recess 4 forming carrier or base body member 6, which is made of an electrically and thermally insulating material with sufficiently high thermal strength, as well as an outer housing or body member 7 made of metal, with which the heating module 1 can be fastened to a support structure, not shown, of an electric range.
  • the heating tape 3 is made of a suitable for such heating tapes thin metallic sheet material (metal sheet) so that this heating tape 3, as shown clearly in Figures 2 and 3, to axes perpendicular to its longitudinal extent zig-zag-shaped remaining or spring-back bent or profiled, with each rectilinear or flat or substantially rectilinear or substantially planar band sections 8 between two outer rounded reversal regions 9 and 10 of the zig-zag profiling.
  • the heating tape 3 is in the middle of each leg portion 8, i. each with the same distance from the adjacent reverse regions 9 and 10 integrally provided with over a common longitudinal edge or a common longitudinal edge 11 wegêt tab-like fasteners 12, each of which as well as the associated leg portion 8 is formed plan.
  • the heating tape thus forms a continuous band-like resistance section 13 with the longitudinal edge 11 and a fastening section consisting of a plurality of fastening elements 12.
  • the heating tape 3 in the floor 4.1 is mounted upright standing such that the planes of the leg portions 8 are oriented perpendicular or substantially perpendicular to the plane of the bottom 4.1.
  • the fasteners 12 grab this into the material of the base body member 6 and are anchored there in a suitable manner, in such a way that the longitudinal edge 11 is in the plane of the bottom 4.1, or that the longitudinal edge 11 is slightly spaced from the plane of the bottom 4.1, or that the resistance portion 13 of the heating tape 3 along the longitudinal edge 11 is slightly embedded in the material of the base body element 6.
  • the resistance section 13 has a width or height H and the fastening elements 12 has a length L which is smaller than the width H in the illustrated embodiment, but in any case is also significantly smaller than the material thickness of the insulating base body element 6 in the area of the ground 4.1.
  • the width B of the fastening tabs 12 is smaller than the length of the respective leg section 8 and in the illustrated embodiment is approximately one third of the length of the associated leg section 8.
  • the zigzag-shaped profiled heating strip 3 distributed in several turns on the bottom 4.1 is connected at its two ends to connection electrodes 14, via which the heating current is supplied during operation of the heater, in such a way that the heating strip 3 is in a visible beam area is operated.
  • the heating tape 3 is uniformly profiled over its entire length, i. the leg portions 8 each have the same length.
  • the heating tape 3 is furthermore also mounted on the base body 2 in such a way that the fastening tabs or elements 12 which follow each other in the heating tape longitudinal direction have one and the same distance from each other.
  • the heating tape ie by the zigzag-shaped profiling, by the arrangement of the fasteners 12 each in the middle of a leg portion 8 and exclusively on these leg portions 8, and by the flat and relatively narrow design of the fasteners 12, also Compared to the height H of the resistance section 13 is achieved that when switching on and off of the heater 1 as well as during operation of the heater, a uniform temperature distribution along the heating tape 3 and in particular a uniform, homogeneous optical glow pattern result, without visually perceptible differences in brightness within the leg portions 8 and the adjacent reversal regions 9 and 10th
  • This uniform temperature distribution is due in particular to the fact that the fastening elements 12 are not provided distributed arbitrarily on the heating tape 3, but each exactly in the middle of the respective leg portion 8, and that the fastening elements 12 are formed relatively narrow, especially in comparison to the height H of Resistance section 13. Alone by the narrow design of the mounting tabs 12 results in no noticeable change in resistance or resistance along the heating strip 3 and no significant heat dissipation from the resistance region 13 to the base member 6.
  • the heating tape 3 is held on each leg section 8 with a fastening element 12 on the base body 2, a reliable anchoring of the heating tape 3 is ensured on the body, ie given a high bonding strength between the heating tape 3 and body 2. Due to the uniform temperature distribution along the heating strip 3 and by avoiding hot and cold areas thermally induced stresses within the heating band are further avoided and thus, inter alia, the risk of corrosion or oxidation at particularly hot areas of the heating tape, so that by the inventive design Life of the heating module 1 is substantially increased.
  • the materials used for the heating tape 3 and the base bodies 2 and the base body member 6 have greatly different coefficients of thermal expansion, so that it comes at the prevailing during operation of the heater 1 relatively high temperature to different length expansions between the base body 2 and heater 3 ( Length expansions) but by the zig-zag shape of the heating tape 3 and by the arrangement of the fasteners 12 each only in the middle of the leg sections 8 and balanced without a significant increase in mechanical stresses already by a slight elastic deformation in the rounded return regions 9 and 10 can be. Thermally induced stresses that could lead to damage to the base body 2 and in particular to a detachment of the heating tape 3 from the main body 2, are thus effectively avoided.
  • the fastening elements 12 are not distributed arbitrarily distributed on the heating tape 3, but in each case exclusively on the flat or substantially planar leg portions 8 and thus also plan or substantially plan are formed. This can be achieved, for example, with the production method of the heating strip 3 shown schematically in FIGS. 3 and 4.
  • a metallic thin strip-shaped flat or starting material 15 (metal sheet) is used, which has a width which is equal to the sum of H and L, and which in the manufacture, for example continuously from a supply or a Roll withdrawn and profiled in a first processing station 16.
  • the workstation 16 consists essentially of two counter-driven, gear-like Profiliercept17 and 18, which form a working or Profilierspalt in the region of their intermeshing teeth or interdental spaces through which the band-shaped starting material 15 is passed so that it then in the conveying direction A after Workstation 16 which has over the entire length of the heating band uniform zig-zag profiling.
  • the workstation 19 again has two gear-like wheels or rollers 20 and 21, which interlocking with their teeth and interdental spaces form a guide and Ausrichtspalt through which the profiled starting material 15 is guided aligned with respect to its profiling.
  • the wheels 20 and 21 simultaneously form the cutting tools for free cutting or free punching of the fasteners 12th
  • the starting sheet material 15 is precisely aligned with its profiling relative to the rotational position of the wheels 20 and 21, it is also possible to cut out the fastening elements 12 from the starting sheet material 15 with the cutting tools or cutting edges provided on these wheels, in each case exactly in the middle a leg section 8.
  • the relative resistance per unit length of the Trustflachmaterials 15 can be determined continuously, for example by measuring the electrical resistance between two spaced apart in the longitudinal direction of the Trustflachmaterials 15 areas. The measured resistance value is compared with a setpoint stored in a measurement and control electronics, so that then the width or height H of the resistance portion 13 are varied so when free cutting of the fasteners 12 in the workstation 19, that for the resistance portion 13 of the required resistance per unit length results, while maintaining the uniform zig-zag profiling.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)
EP06013809A 2005-08-01 2006-07-04 Ruban chauffant pour appareil de chauffage électrique, appareil de chauffage avec un tel ruban chauffant et procédé de fabrication du ruban chauffant Withdrawn EP1750484A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005036581A DE102005036581A1 (de) 2005-08-01 2005-08-01 Heizband für einen elektrischen Heizer, Heizer mit einem derartigen Heizband sowie Verfahren zum Herstellen des Heizbandes

Publications (1)

Publication Number Publication Date
EP1750484A1 true EP1750484A1 (fr) 2007-02-07

Family

ID=36926792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06013809A Withdrawn EP1750484A1 (fr) 2005-08-01 2006-07-04 Ruban chauffant pour appareil de chauffage électrique, appareil de chauffage avec un tel ruban chauffant et procédé de fabrication du ruban chauffant

Country Status (3)

Country Link
US (1) US7446286B2 (fr)
EP (1) EP1750484A1 (fr)
DE (1) DE102005036581A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2933916A3 (fr) * 2014-04-07 2016-02-17 Control Techniques Ltd Entraînement à moteur et procédé de commande de température d'un entraînement de moteur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110062145A1 (en) * 2007-09-10 2011-03-17 Amo Co., Ltd. Drying heater, heating unit for drying laundry using the same, drying control system and control method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161648A (en) * 1975-11-14 1979-07-17 E. G. O. Elektro-Geraete Blanc Und Fischer Electrical radiation heater for a glass ceramic plate
EP0590315A2 (fr) 1992-09-03 1994-04-06 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Elément chauffant, en particulier pour appareils de cuisine
EP0871346A2 (fr) * 1997-04-12 1998-10-14 Ceramaspeed Limited Elément de chauffage électrique et méthode de fabrication
US5834740A (en) * 1995-06-23 1998-11-10 E.G.O. Elektro-Geratebau Gmbh Method of producing a radiant heater and radiant heater
US5892205A (en) * 1995-05-17 1999-04-06 E.G.O. Elektro-Gerate Blanc Und Fischer Gmbh & Co. Kg Heater
EP1011296A1 (fr) * 1998-04-08 2000-06-21 Eika, S.Coop Systeme de fixation d'une resistance chauffante dans une plaque de cuisson
EP1229763A2 (fr) * 2001-02-02 2002-08-07 Eika, S.Coop Résistance plate destinée au chauffage de plaque de cuisson
WO2004066682A1 (fr) * 2003-01-18 2004-08-05 Ceramaspeed Limited Appareil de chauffage electrique par rayonnement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161648A (en) * 1975-11-14 1979-07-17 E. G. O. Elektro-Geraete Blanc Und Fischer Electrical radiation heater for a glass ceramic plate
EP0590315A2 (fr) 1992-09-03 1994-04-06 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Elément chauffant, en particulier pour appareils de cuisine
US5892205A (en) * 1995-05-17 1999-04-06 E.G.O. Elektro-Gerate Blanc Und Fischer Gmbh & Co. Kg Heater
US5834740A (en) * 1995-06-23 1998-11-10 E.G.O. Elektro-Geratebau Gmbh Method of producing a radiant heater and radiant heater
EP0871346A2 (fr) * 1997-04-12 1998-10-14 Ceramaspeed Limited Elément de chauffage électrique et méthode de fabrication
EP1011296A1 (fr) * 1998-04-08 2000-06-21 Eika, S.Coop Systeme de fixation d'une resistance chauffante dans une plaque de cuisson
EP1229763A2 (fr) * 2001-02-02 2002-08-07 Eika, S.Coop Résistance plate destinée au chauffage de plaque de cuisson
WO2004066682A1 (fr) * 2003-01-18 2004-08-05 Ceramaspeed Limited Appareil de chauffage electrique par rayonnement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2933916A3 (fr) * 2014-04-07 2016-02-17 Control Techniques Ltd Entraînement à moteur et procédé de commande de température d'un entraînement de moteur
US9722514B2 (en) 2014-04-07 2017-08-01 Nidec Control Techniques Limited Motor drive and method of controlling a temperature of a motor drive

Also Published As

Publication number Publication date
DE102005036581A1 (de) 2007-02-08
US7446286B2 (en) 2008-11-04
US20070023415A1 (en) 2007-02-01

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