EP0729290B1 - Unité de chauffage par radiation et procédé de sa fabrication - Google Patents

Unité de chauffage par radiation et procédé de sa fabrication Download PDF

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Publication number
EP0729290B1
EP0729290B1 EP96101946A EP96101946A EP0729290B1 EP 0729290 B1 EP0729290 B1 EP 0729290B1 EP 96101946 A EP96101946 A EP 96101946A EP 96101946 A EP96101946 A EP 96101946A EP 0729290 B1 EP0729290 B1 EP 0729290B1
Authority
EP
European Patent Office
Prior art keywords
heating
radiant heater
strip
foot portions
heater 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.)
Expired - Lifetime
Application number
EP96101946A
Other languages
German (de)
English (en)
Other versions
EP0729290A2 (fr
EP0729290A3 (fr
Inventor
Martin Dipl.-Ing. Gross (Ba)
Eugen Wilde
Hans Mohr
Werner Dipl.-Ing. Renz (Fh)
Franz Dr.-Ing. Bogdanski
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP0729290A2 publication Critical patent/EP0729290A2/fr
Publication of EP0729290A3 publication Critical patent/EP0729290A3/fr
Application granted granted Critical
Publication of EP0729290B1 publication Critical patent/EP0729290B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • the invention relates to an electric radiant heater with an insulating body and at least one heating conductor fixed to its surface by embedding in the form of an upright band, which with its width section lying above the surface has a substantially uninterrupted heating area with a corrugation and with its width section embedded in the insulating body at least one partially broken open embedding area with individual foot sections.
  • the invention also relates to a method for producing a heating conductor for such a radiant heater.
  • Such a radiant heater is known from DE-93 13 219 U.
  • the very thin band design and its relatively weak coupling to the insulating body make it possible to make the radiator glow very quickly (in the order of 3 seconds) despite surface temperatures in a range permissible for the life of the band.
  • the foot sections are in the form of e.g. trapezoidal projections are provided, which are more or less heating-dependent depending on their length.
  • the utility model is preferably embedded by pressing the foot sections into a molded body made of microporous insulating material.
  • a molded body made of microporous insulating material.
  • the heating conductor tape in that the insulating material body is compressed around the foot sections.
  • the spade shape has an advantageous stiffening effect, in that it increases the resistance to falling of the band and increases the holding force in the lateral and longitudinal directions.
  • the object of the invention is to provide an electric radiant heater which further improves the described prior art and in particular improves the fixing of the heating conductor strip in the insulating body with little heating activity of the foot sections.
  • the object of the invention is also to provide a method for producing a heating conductor for such a radiant heater.
  • the foot sections differ in shape and orientation from the corrugation of the heating area, the following advantages are achieved: If the foot sections are placed very closely parallel to the tape and to improve their anchoring, they form a continuous channel in the insulating body. Since the individual heating conductors are guided parallel to each other at a relatively short distance in the radiator, the intermediate area between two heating conductors is then “cut free” and tends to crumble out. If, on the other hand, the foot sections have a different orientation, this largely continuous cutout is not necessary.
  • the foot sections can be substantially flat. They then deviate from the curl shape of the heating area. However, they can also be deliberately turned in relation to the heating area.
  • the foot sections can be connected to the heating area by connecting sections, the dimensions of which along the band are considerably smaller than the dimensions of the foot sections in this direction.
  • the connecting sections can be incisions which are separated from the heating area either by a relatively wide punching or by very narrow incisions.
  • the fixing by overlapping the insulating material over the foot sections is particularly good, while in the latter case overall height and tape material are saved. Due to the deviation of the foot sections from the Corrugation of the heating area is also avoided that, in the case of relatively narrow incisions, contact is made outside the connecting sections between the heating area and the foot section, which in turn would increase the heating activity of the foot sections. This is undesirable because it causes performance degradation in these sections and can increase the glow time.
  • the invention also proposes a method for producing the heating conductor for the aforementioned radiant electric heater.
  • foot sections can be divided on a strip of heating conductor material by means of incisions and / or punched-outs, and the strip can then be corrugated in the heating conductor area.
  • the fact that the foot sections are not corrugated means that they remain essentially flat in the orientation that their connecting section assumes with respect to the heating conductor strip. If there is no synchronization between the corrugation and the spacing of the foot sections, they protrude relatively irregularly essentially tangentially from the strip, so that they are ideally fixed in the insulating material.
  • Fig. 1 shows a radiant heater which is provided for attachment below a cooking surface, for example a glass ceramic plate. It has a sheet metal carrier shell 9 which has a flat bowl shape. In it is an insulation 3, which consists of an essentially flat, disc-shaped insulating body 4 and an insulating edge 8 which is placed thereon and runs around it.
  • the insulating body 4 consists, for example, of a tablet made of pressed, previously pourable insulating material, for example of pyrogenic silicon dioxide, which has the best thermal insulation properties with high temperature resistance.
  • the insulating material can be adapted to the respective conditions by incorporating mineral fibers, binders and other components which may influence the radiation properties.
  • heating conductors 10 which are made in the form of upright, corrugated strips made of conventional electrical resistance material. These bands are very thin. Their thickness is between 0.02 mm and 0.1 mm, preferably between 0.03 and 0.08 mm.
  • the resistance values and the relationship between the heating conductor mass and the surface are designed in such a way that a rapidly glowing radiator is produced which reaches an annealing temperature after only a few, for example 3 seconds. Nevertheless, the good radiation conditions of the band, which is relatively wide compared to its thickness, ensure that the surface temperatures in the steady state do not exceed a limit that would reduce the service life.
  • a temperature limiter 58 projects with its temperature sensor 61 at a distance beyond the surface 7 of the insulating body 4, which is evenly coated with the heating conductors 10 in spiral or loop-shaped paths (only partially shown).
  • the heating conductors 10 are partially embedded in the insulating body 4, specifically with foot sections 11 which are clearly delimited from the heating region 15 which is designed as a continuous corrugated band.
  • the heating conductors are connected via connections 16, which protrude through the insulating edge 8, to the temperature limiter 58, which also serves as a connecting piece.
  • the curl which can be done quite intensely and with little division, can reach curl factors (ratio of stretched length to length of the corrugated band) of up to 4.
  • the foot sections 11 can have the most varied of shapes, triangular with an arrow shape pointing downwards, semicircular, trapezoidal, circular, triangular with a longer side at the bottom, rectangular or the like. They are from the heating area 15 separated by incisions 12 which are relatively narrow in Fig. 2, while they are relatively wide in Fig. 3. The narrower cuts can be made by cutting and the wider cuts can be made.
  • the foot sections 11 are connected to the heating region 15 by connecting sections 13 which, in the exemplary embodiment, interrupt the incisions 12 made from both sides in the middle of the foot sections and are formed in FIG. 3 as middle webs.
  • they could also be arranged on one side, which, under certain conditions, can further improve the holding effect described below.
  • the foot sections are essentially flat, ie they do not follow the corrugation of the band in their profile or are less or more curved than this.
  • the two middle sections are deflected from the band stretching, which can be done by various influences. However, they are flat, while the right-hand, already mentioned foot section formation 11 corresponds to the band in its curvature, but is deflected differently.
  • the foot sections are thermally and electrically connected to the heating region 15 only via the narrow connecting section 13. As a result, the foot section is practically non-current-carrying and heating-passive. It is not originally heated.
  • a method can be used to produce the radiant heater by attaching the heating conductors 10, in which the insulating body 4 is still relatively soft while the heating conductors 10 are being attached. This also depends on the type of foot sections and the thickness of the heating conductor material and the type of insulating material for the insulating body.
  • the embedding can be done by pressing the previously loose insulation material around the foot sections by attaching the heating conductors to a stamp so that the heating area 15 is in grooves while the foot sections protrude.
  • the heating conductor material is then introduced into a cylindrical counter-shape and compressed with the stamp, the foot sections 11 being also molded in.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)

Claims (7)

  1. Corps de chauffage électrique par rayonnement avec un corps isolant (4) et au moins un conducteur chauffant (10) fixé à la surface (7) de celui-ci par incorporation, en forme d'une bande en position droite, ondulée dans sa direction longitudinale, laquelle forme dans le secteur de l'extension en large situé au-dessus de la surface (7) un domaine de chauffage (15) essentiellement ininterrompu et avec son secteur de l'extension en large incorporé dans le corps isolant (4) un domaine d'incorporation ajouré au moins en partie avec des secteurs de patte de fixation (11) individuels, caractérisé en ce que le secteur de chauffe et le secteur d'incorporation sont séparés l'un de l'autre de telle manière qu'en direction longitudinale de la bande les secteurs de patte (11) sont formés et/ou orientés de manière différente par rapport à l'ondulation du domaine de chauffe (15).
  2. Corps de chauffage par rayonnement d'après la revendication 1, caractérisé en ce que les secteurs de patte (11) sont essentiellement plans.
  3. Corps de chauffage par rayonnement d'apres la revendication 1 ou 2,
    caractérisé en ce que les secteurs de patte (11) sont raccordés au domaine de chauffe (15) par de secteurs de raccordement (13), dont les dimensions le long de la bande sont essentiellement inférieures par rapport aux dimensions des secteurs de patte dans cette direction.
  4. Corps de chauffage par rayonnement d'après la revendication 3, caractérisé en ce que les secteurs de patte (11) sauf les secteurs de raccordement (13) sont séparés du domaine de chauffe (15) par des entailles (12).
  5. Corps de chauffage par rayonnement d'après la revendication 4, caractérisé en ce que les entailles (12) ont une faible largeur de moins de 1 mm, de préférence de moins de 0,5 mm.
  6. Corps de chauffage par rayonnement d'après une des revendications précédentes, caractérisé en ce que la bande de conducteur chauffant (10) est ondulée en substance seulement dans le domaine de chauffe (15).
  7. Procédé pour la fabrication d'un conducteur chauffant pour un corps de chauffage électrique par rayonnement d'après une des revendications précédentes, caractérisé en ce qu'auprès d'une bande en matériau de conducteur chauffant des secteurs de patte (11) sont séparés par des entailles (12) et/ou par des découpages et qu'ensuite la bande est ondulée dans le domaine de chauffe, les secteurs de patte étant exclus de cette action de mise en forme ondulée.
EP96101946A 1995-02-25 1996-02-10 Unité de chauffage par radiation et procédé de sa fabrication Expired - Lifetime EP0729290B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19506685 1995-02-25
DE19506685A DE19506685A1 (de) 1995-02-25 1995-02-25 Elektrischer Strahlungsheizkörper und Verfahren zu seiner Herstellung

Publications (3)

Publication Number Publication Date
EP0729290A2 EP0729290A2 (fr) 1996-08-28
EP0729290A3 EP0729290A3 (fr) 1997-06-04
EP0729290B1 true EP0729290B1 (fr) 2001-09-19

Family

ID=7755078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101946A Expired - Lifetime EP0729290B1 (fr) 1995-02-25 1996-02-10 Unité de chauffage par radiation et procédé de sa fabrication

Country Status (4)

Country Link
US (1) US5753892A (fr)
EP (1) EP0729290B1 (fr)
AT (1) ATE205995T1 (fr)
DE (2) DE19506685A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ169298A3 (cs) * 1997-07-15 1999-02-17 Ako-Werke Gmbh & Co. Kg Topný vodič pro sálavé topné těleso kuchyňského vařiče
DE10111000A1 (de) * 2001-03-07 2002-09-19 Microhellix Systems Gmbh Heizleiterwendel zum Erwärmen eines strömenden gasförmigen Mediums sowie elektrisches Widerstandsheizelement
ITPN20010045U1 (it) * 2001-11-19 2003-05-19 Irca Spa Resistenza elettrica corrugata e relativa piastra irradiante.
DE20304982U1 (de) * 2003-03-26 2004-08-05 Krieger, Detlev, Dipl.-Ing. Elektrische Widerstandsheizvorrichtung
DE20304976U1 (de) * 2003-03-26 2004-07-29 Krieger, Detlev, Dipl.-Ing. Elektrische Widerstandsheizvorrichtung
EP1687428A1 (fr) 2003-11-14 2006-08-09 Novo Nordisk A/S Procede de fabrication d'insuline acylee
DE102004049184A1 (de) * 2004-10-08 2006-04-13 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld sowie Verfahren zur Herstellung eines Kochfelds
KR102173541B1 (ko) * 2013-06-14 2020-11-03 샌드빅 가부시키가이샤 이규화몰리브덴계 세라믹 발열체 유지 구조체

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE317753C (fr) *
US600057A (en) * 1898-03-01 Rheostat and electric heater
US3567906A (en) * 1969-04-14 1971-03-02 Gen Electric Planar surface heater with integral fasteners for heating element
US3984615A (en) * 1975-10-14 1976-10-05 Btu Engineering Corporation Electrical resistance furnace heater
DE2551137C2 (de) * 1975-11-14 1986-04-24 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektrischer Strahlungsheizkörper für Glaskeramikkochplatten
US4207672A (en) * 1978-12-18 1980-06-17 Aerospex Corporation Heater element mounting
US4292504A (en) * 1979-10-02 1981-09-29 Tutco, Inc. Expanded metal electric heating element with edge support
DE3129239A1 (de) * 1981-07-24 1983-02-10 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektrischer heizkoerper fuer die beheizung einer platte und verfahren zu seiner herstellung
DE3812490A1 (de) * 1988-04-15 1989-11-02 Ego Elektro Blanc & Fischer Strahlheizkoerper
DE3828192A1 (de) * 1988-08-19 1990-02-22 Ego Elektro Blanc & Fischer Strahlheizkoerper sowie verfahren und vorrichtung zu seiner herstellung
ATE136382T1 (de) * 1988-10-14 1996-04-15 Omron Tateisi Electronics Co Kartenleser mit verriegelungsmechanismus
DE4019898A1 (de) * 1990-06-22 1992-01-02 Ego Elektro Blanc & Fischer Verfahren und vorrichtung zum befestigen von heizwiderstaenden auf einem traeger
DE4229375C2 (de) * 1992-09-03 2000-05-04 Ego Elektro Blanc & Fischer Strahlungs-Heizkörper
DE9313219U1 (de) * 1992-09-03 1993-10-28 Ego Elektro Blanc & Fischer Heizer, insbesondere für Küchengeräte
GB2275161B (en) * 1993-02-11 1996-05-15 Ceramaspeed Ltd Method of manufacturing a radiant electric heater
DE69406818T2 (de) * 1993-02-11 1998-04-30 Ceramaspeed Ltd Elektrisches Heizelement, seine Herstellung und Verwendung
GB2278261B (en) * 1993-05-21 1996-07-03 Ceramaspeed Ltd Method of manufacturing a radiant electric heater

Also Published As

Publication number Publication date
US5753892A (en) 1998-05-19
DE59607699D1 (de) 2001-10-25
EP0729290A2 (fr) 1996-08-28
ATE205995T1 (de) 2001-10-15
DE19506685A1 (de) 1996-08-29
EP0729290A3 (fr) 1997-06-04

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