EP0927503B1 - Element chauffant a rayonnement avec conducteur chauffant en feuille metallique - Google Patents

Element chauffant a rayonnement avec conducteur chauffant en feuille metallique Download PDF

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Publication number
EP0927503B1
EP0927503B1 EP97909277A EP97909277A EP0927503B1 EP 0927503 B1 EP0927503 B1 EP 0927503B1 EP 97909277 A EP97909277 A EP 97909277A EP 97909277 A EP97909277 A EP 97909277A EP 0927503 B1 EP0927503 B1 EP 0927503B1
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EP
European Patent Office
Prior art keywords
heating element
element according
radiant heating
insulating base
holding
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
EP97909277A
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German (de)
English (en)
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EP0927503A1 (fr
Inventor
Günter Dittmar
Josef Hecht
Günther Wildner
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Diehl AKO Stiftung and Co KG
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Diehl AKO Stiftung and Co KG
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    • 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

Definitions

  • the invention relates to a radiant heater for a hob, in particular a glass ceramic hob with a metal foil heating conductor.
  • US-A-4,034,206 discloses a generic radiant heater for a glass ceramic cooktop with a heating conductor made of a metal foil and an insulating base underneath the heating conductor.
  • the heating conductor runs between in a geometric pattern the hob and the insulating floor.
  • the geometric pattern of the heating conductor is from the Separated metal foil and forms heating webs whose thickness is much smaller than theirs Width and the large surface of which faces upwards towards the glass ceramic cooktop.
  • the Heating bars are held and lie on at least one outer ring edge of the insulating base with external current bridges free in recesses in the wall, so a certain To be able to record movement of the heating conductor.
  • a radiant heater is known in which the The bottom of the heating webs facing the insulating floor is at least partially free at a distance runs over the insulating floor.
  • the heating conductor consists of a flexible flat strip that spirals on the insulating floor is laid that its large surface perpendicular to the insulating floor and stand by the hob. Only its narrow top edge faces the hob. By this arrangement mutually irradiates the large surfaces. To determine the Schuleiterbandes this on its lower edge retaining tabs, which in the insulating floor are plugged in themselves.
  • the assembly of the heating conductor is complex because the ribbon must be laid in spiral turns, and because the retaining tabs in the insulating floor must be pushed in. At the high temperatures, greater than 600 ° C, the In radiation operation, corresponding strains occur on the heating conductor, which do not lead to this may that the heating conductor detaches from the insulating floor.
  • a heating conductor is described in EP 0 175 662 B1 whose flat geometric pattern is stamped out a foil laminate enclosing a metal foil is separated out.
  • This radiator is only suitable for Temperatures below 200 ° C, max. 400 ° C, and is therefore as Radiant heaters cannot be used.
  • EP 0 229 928 A2 describes a heating element for Cooking places known that a Schuleiterbahn in Flat conductor technology, preferably thick-film paste technology, has on a dimensionally stable support element is applied. A radiant heater where it is on the glow of the heating conductor arrives is not there described.
  • U.S. Patent 3,567,906 describes a sinusoidal winding flat heating wire, in parallel strips is laid under the hob.
  • the flat heating wire should not be visible through the hob. It is not a radiant heater, where it is important that the heating conductor for the User glows visibly.
  • DE 41 22 106 A1 is a radiant heater described, the heating coil by means of a molded part are held down on the insulating floor.
  • the object of the invention is a radiant heater to propose of the type mentioned at the outset Heating conductor can be easily installed above the insulating floor, whereby the thermal expansion of the heating conductor is safe caught and favorable radiation properties, before all with regard to the quickly visible glow and of efficiency, should be achieved.
  • the above task is for one Radiant heater of the type mentioned by Features of the characterizing part of claim 1 solved.
  • the heating conductor is separated from a metal foil, for example punched out, cut out or etched out is, it is in the plane of its flat geometric Patterns fairly stable, with this plane parallel between the level of the hob and the level of the Insulating floor.
  • the geometric pattern is for example star-shaped, meandering or spiral. It can also take the form of a company logo, for example a character, a characteristic Sequence of letters, or of letters and / or numbers take in.
  • the heating conductor can be made in one piece from a metal foil cut out if a metal foil is available, the one corresponding to the diameter of the heating conductor Width. However, it can also be made up of several pieces put together, each part of the geometric Pattern. The heating conductor pieces are thereby preferably in such widened zones with each other connected in operation compared to the heating bars stay cold.
  • the prefabricated heating conductor can be easily over put the insulating floor, laying procedures such as for example, spiral winding is eliminated.
  • the heating bars of the heating conductor turn their large Surface to the hob. It is thus achieved that the heating conductor covers a large part of the area of the Occupies the hob, making it cheap Radiation properties are achieved. The distances between the narrow edges of the heating conductor only need be so large that the necessary electrical insulation between the heating bars is guaranteed. The for Available surface of the hob can be largely cover with heating conductors.
  • Another advantage is that the overall height of the radiant heater can be made small, or at the same height, the thickness of the insulating floor and so that its thermal insulation effect can be increased.
  • the actual heating webs preferably float, especially when cold and preferably also when hot, free above the insulating floor. You can at the consequence the high radiation temperatures, which are above 600 ° C and can reach up to 1200 ° C, inevitably occurring Thermal expansion in the direction of the insulating floor sag without loosening the Heating conductor comes.
  • the air space between the heating bars and the insulating floor has a heat-insulating effect. To do that To decrease sagging can reduce the rigidity of the flexible heating elements can be increased in that they are U-shaped or V-shaped in their cross-section.
  • the profiling can extend over the entire length or extend part of the length.
  • the heating conductor is preferably fixed on its Geometric pattern designed holding tabs for example on a ring edge of the insulating base sit. This ring edge can be a separate part of the Insulated floor attached or in one piece on this be designed.
  • the outer ring edge is preferably one ring-shaped outer zone of the Isolier undergraduate and a ring part placed on this made of thermally and electrically insulating material formed, the retaining tabs between the outer zone and grip the ring part. This allows the Simply attach the heating conductor to the ring-shaped one Put on the outer zone, keeping the desired distance from occupies the insulating floor. By putting on the ring part the heating conductor is fixed.
  • the heating conductor can also be connected to a central inner point of the heating web fixed his.
  • Holding tabs so wide than the heating bars that their Operating temperature remains below the annealing temperature. It is thus avoided that those sitting in the ring edge Retaining tabs on the insulating material unnecessarily heating temperature come. In addition, in such widened, especially comparatively cool zones also any necessary electrical connections be provided so that this the life of the Do not affect the heating element.
  • a heating conductor is in a desired geometric Pattern (see Fig. 1 to 5) from a thin, equally thick Metal foil with a suitable for a heating conductor specific electrical resistance, for example through a cutting process, punching process or etching process separated.
  • the thickness of the metal foil is for example about 0.03 to 0.1 mm.
  • the Heating conductor in one piece, being below one circular hob of a glass ceramic plate lying entire flat geometric pattern separated out a correspondingly wide metal foil is.
  • the heating conductor from two or more pieces with each piece being part of the forms geometric pattern.
  • heating bars (1) on the heating conductor there are several heating bars (1) on the heating conductor, outer ones Holding tabs (2) and two power connections (3) formed.
  • the heating webs (1) are so wide that they are in operation glow visibly.
  • the retaining tabs (2) and the Power connections (3) are wider than the heating bars (1) designed so that they do not Annealing temperature come.
  • the heating webs run (1) in a right and left semicircle, respectively parallel.
  • the outer retaining tabs (2) are on the Circumference, with two adjacent heating bars are connected externally by an outer retaining tab.
  • Two adjacent heating elements (1) are on the inside an inner retaining tab (8) connected, the Heating bars (1) between the power connections (3) electrically in line.
  • a row / Parallel connection can be designed.
  • the inner retaining tabs (8) lie in two rows a diagonal zone of circular shape (see Fig. 1).
  • To the outer or inner retaining tabs (2.8) can Heating conductor in the manner described in more detail below fix.
  • connection point (X) with each other, for example by welding, connect.
  • each stabilizing bar (5) serves to stiffen the flexible heating conductor during transport and assembly.
  • the cross section of each stabilizing bar (5) is much smaller than that of a heating element (1).
  • the heating conductor is composed of six identical segments, which on the Connection points (X) are interconnected.
  • the heating bars (1) run parallel to each segment to each other.
  • the outer Retaining tabs (2) stabilizing bars (5).
  • the inner ones Retaining tabs (8) are only indicated schematically. This Semiconductor pattern brings good use of the Heating surface and provides a star-like glow pattern.
  • a star-shaped heating conductor pattern is shown in FIG. 3.
  • a pair of parallel heating elements (1) form one Ray of the star pattern.
  • the rays are radial alternately different lengths
  • the heating conductor there is on the heating conductor as a stabilizing web (5) an inner ring.
  • the inner ring (5) is because it has a forms an electrical short circuit before assembly, burned out, for example, over predetermined breaking points.
  • the heating bars (1) are between the Power connections (3) electrically in series, being over the retaining tabs (2), which are on the branches of the geometric pattern are provided, and the outer Form connecting webs (6) and over inner Connecting webs (7), which are also inner retaining tabs (8) form, are electrically connected.
  • FIG. 5 different courses of the heating webs (1) are Clarification of the possibilities shown.
  • a part of Heating bars (1) run in pairs parallel to each other.
  • Other heating webs (1 ') run approximately radially to Center point (M).
  • M Center point
  • the outer retaining tabs (2) face each other the outer connecting webs (6) to the outside.
  • the inner retaining tabs (8) are opposite the inner ones Connecting webs (7) inwards over.
  • the widths of the inner connecting webs (7) and / or the outer Connecting webs (6) can do this depending on the requirement be designed so that they operate like the heating webs (1, 1 ') glow or not glow.
  • 6,7,8,10,15 and 24 to 30 is one under one translucent glass ceramic plate (9) Radiant heater (10) shown schematically.
  • Pot (11) made of sheet metal of the radiant heater (10) is a Insulating floor (12) from a radiator known, thermally and electrically insulating material arranged.
  • 6,7,8,10 and 24,27 the ring edge (13) of the insulating base (12) in Protruding in the direction of the glass ceramic plate (9) annular outer zone (14) and one on this attachable ring part (15) is formed.
  • annular outer zone (14) and the ring part (15) are the outer retaining tabs (2) frictionally or positively held.
  • Breakthroughs (21) or claws are provided, which after down into the outer zone (14) or up into the ring part (15) are depressed.
  • the 6 is for storage of the inner holding tabs (8) on the insulating base (12) a base (17) trained. This extends for one 1 in the diagonal zone on the the inner retaining tabs (8) are also located.
  • the two parallel rows of the inner retaining tabs (8) are by means of an inner holding part (19) by a straight retaining strip is formed on the base (17) fixed.
  • the retaining strip consists of a ceramic Material that is more dimensionally stable than the material of the Insulated floor (12).
  • the retaining bar is on the base (17) for example attached by gluing or staples or held by means of the ring part (15). Above the Retaining bar (19) extends parallel to the Radiant heaters known per se Expansion temperature sensor.
  • Fig. 6 shows the sag (23) of the heating webs (1) in the hot Status.
  • the arrangement is preferably chosen so that even when hot, the heating bars (1) the insulating floor (12) do not touch. In the cold state there is a correspondingly larger distance between the large lower Surface of the heating webs (1) and the insulating base (12).
  • Fig. 7 shows an alternative to Fig. 6.
  • the heating webs are profiled here, as is shown in FIG. 9 is shown to the stability of the heating webs too increase and thus reduce the sag.
  • the inner retaining tabs (8) are like this bent down that they the heating webs (1) from Keep the insulating base (12) spaced apart. You are in one the insulating base (12) fastened holding part (19) electrically insulating material, for example ceramic or mikanite (resin-bonded mica), inserted. Corresponding insertion openings can be made on the holding part (19) be designed. The one occurring on the heating bars (1) Thermal expansion is due to the flexibility of the inner Holding tabs (8) caught. To accommodate the Thermal expansion can also be provided that the inner and / or outer holding tabs on their holding parts in are movable to a limited extent.
  • electrically insulating material for example ceramic or mikanite (resin-bonded mica
  • the heating webs (1) are only profiled over part of its length and in one Length range (L) not profiled.
  • This length range (L) runs slightly angled and reduces thermal expansion the heating bars on.
  • the profiled length ranges can lie completely or almost on the insulating floor (12).
  • FIG. 9 shows a cross section of two neighboring ones profiled heating elements (1).
  • This profile is through Press in the heating elements (1) before assembly in Radiant heater V or U-shaped.
  • This Design has the advantage that the heating bars in Longitudinal direction become more stable and that neighboring, parallel heating elements (1) when the Heating conductor from the metal foil with a single Cut can be separated from each other without loss of material can and the necessary electrical insulation distance (c) then by pressing in the V-shaped profile arises.
  • this shape has the advantage that the Radiation properties of each holding bridge (1) targeted be affected by either the concave surface or the convex surface of the glass ceramic plate (9) is facing.
  • a cap (19) can be put on as an inner holding part like the ring part (15) from an electrical and thermal insulating material.
  • passages (21) On the outer retaining tabs (2) and / or the inner Retaining tabs (8) can be designed passages (21) (cf. Fig. 11). These passages (21) can be on the Simple metal foil in the area of the holding tabs (2.8) by hammering in a pointed tool, where metal foil tips arise. These take effect when Pressing on the ring part (15) (see Fig. 11) and / or the inner holding part (19) depending on the orientation in the Ring part (15) or the holding part (19) or in the outer zone (14) or the base (17). It can also be a combination of tabs and / or claws and / or passages be provided. Instead of the passages (21) could also claws bent at the ends of the retaining tabs (2,8) be provided.
  • the passages or claws serve the radial securing of the heating conductor in the Radiant heater.
  • the swivels or claws can also be a frictional clamping of the retaining tabs (2,8) through the ring part (15) and / or the holding part (19) be provided.
  • FIG. 12 shows a further alternative for the definition the inner retaining tabs (8).
  • the in the case of the heating conductor according to FIG. 1 via the diagonal Zone is elongated, in the case of the heat conductor Fig. 2 is star-like according to the segmentation and in the case of the heating conductor according to FIGS. 3 and 4 is circular.
  • the retaining tabs (8) Over the upper edges (17 ', 17' ') of the Base part are the retaining tabs (8) in one Turning angle bent and using a U-shaped strip-like holding parts (19 ', 19' ') clamped. Thereby is a tight fit that prevents the retaining tabs (8) at the temperature-related Loosen stretch or shrink. This is because of it supports that the heating bars shrink to the Holding parts (19 ', 19' ') exert a tilting moment that the Clamp effect increased.
  • FIG. 13 and 14 show further alternatives for the Fastening the retaining tabs.
  • On the inner and / or outer retaining tabs (8,2) are indentations (8 ') trained (see Fig. 13), which a toothing (17 '' ') a ceramic, attached to the insulating base (12) Base part (17) is assigned.
  • Indentations (8 ') By inserting the Indentations (8 ') between the teeth (17' '') a positive fit of the retaining tabs is achieved.
  • a similar form-fitting connection could also be carried out create a hole and pin pair.
  • the assembly is essentially as follows:
  • the outer Retaining tabs (2) and the inner retaining tabs (8) are located then on, with those running between them Heating webs (1) preferably at a distance (a) from that Extend insulating floor (12).
  • the bottom big ones Surfaces of the heating webs (1) are the insulating floor (12) facing.
  • the upper large surfaces of the heating elements (1) are facing the level of the glass ceramic plate (9). Just the narrow edges of adjacent heating elements stand towards each other. Then, to fix the outer retaining tabs (2) and the inner retaining tabs (8) the ring part (15) and the inner holding part (19) placed.
  • the retaining tabs (2.8) can therefore only be limited or stop moving, taking some agility in the radial direction on the outer zone (14) and / or on Base (17) can be approved. In any case, come loose the retaining tabs (2.8) for operational stretching and shrinkage from their attachment points.
  • the upper large surface of the heating webs (1) is located thus at a distance (b) from the glass ceramic plate (9). Then, if necessary, the stabilizing bars (5) severed. In operation when the heating bars (1) at Temperatures above 600 ° C radiate visibly on them a considerable temperature expansion, so that it in sag the space (22) formed by the distance (a). This sag is 23 in FIGS. 6 and 10 designated.
  • the distance (a) is designed so that the Heating bars (1) when sagging the insulating floor (12) preferably do not touch.
  • a further metal foil part (20) be arranged as a temperature sensor (see Fig. 10). This has a temperature dependent electrical Resistance on which is a measure of the temperature of it irradiating heating webs (1).
  • the temperature sensor (20) can with a usual with radiant heaters Temperature controller can be connected.
  • FIG. 15 shows a further exemplary embodiment.
  • the insulating base (12) does not face the glass ceramic plate (9) raised outer zone (14).
  • recesses (24) are provided, in which the in this version angled downwards Engage the retaining tabs (2.8).
  • a corresponding Design with recesses (25) is the inner Retaining tabs (8) provided.
  • Holding tabs (2) are bent downwards and grip Play in a recess (24) in the outer zone (14). Similar grab the inner retaining tabs that are bent downwards (8) in a recess (25) of the base (17). The The heating conductor is thereby secured radially and its Thermal expansion is absorbed.
  • 16, 17 and 18 are in the embodiment the heating webs (1) in the longitudinal direction, perpendicular to Insulated floor (12) corrugated. Between the wave valleys there is the distance (a) to the insulating floor (12). Between There is a distance (b) to the wave ceramic peaks (9). 16, the waves are uniform. According to Fig. 17 the wave crests or wave valleys are different high or low. This is in zone (A) with the higher waves have a higher radiation density than in zone (B) with the flatter waves. According to Fig. 18 the wavelengths are different. This will in the zone (A) with the shorter wavelengths a larger one Radiation density reached than in zone (B) with the longer wavelengths. This makes it a targeted one Influencing the radiation density in the inner and outer Areas of the radiant heater possible.
  • FIGS. 19 and 20 Another embodiment is shown in FIGS. 19 and 20 shown.
  • a straight meandering pattern (cf. Fig. 19) is separated from a metal foil strip, the has the width (C).
  • the cuts at which the Connect adjacent identical patterns are with the Power connections (3).
  • the outer zone (14) has a slope (34) sloping outwards towards the pot (11) on.
  • a corresponding slope (35) is on the Ring part (15) formed, the retaining tabs (2) engage a bend (36) between the bevels (34, 35).
  • the bends (36) on the retaining tabs (2) be prefabricated.
  • the ring part (15) on the bends (36) exerted pressure arises at the bends (36) Force component that tries to pull this outwards so that the heating webs (1) are stretched radially.
  • an upward bend (37) is provided, which engages in a recess (38) of the ring part (15).
  • the bend (37) around less than 90 ° from the plane of the geometric Pattern of the heating conductor bent.
  • the bend (39) of the retaining tab (2) more than 90 ° upwards from the plane mentioned bent over so that a fairly stable hook arises. This is one formed by the ring part (15) Stop (40) assigned to the bend (39) and thus the retaining tab (2) is not between the outer zone (14) and the ring part (15) can slide out.
  • 25 and 26 show alternatives for the Fastening the inner retaining tabs (8).
  • 25 and 26 is an inner holding part, a holding bar (19) intended. This has for the inner retaining tabs (8) of the heating conductor (see Fig. 1) two rows of slots (42), with each holding tab (8) having its own Slot is provided.
  • the retaining bar (19) is there for example made of resin-bound mica flakes (Micanite). Through the slots (42) are the ends of the Retaining tabs (8) inserted and at the top and bottom of the Retaining strip (19) bent about 90 °, so that it in the Firmly lock the slots (42) (see Fig. 25).
  • the retaining strip (19) according to FIGS. 25 and 26 can be on a base (17) of the insulating base (12) described above sit on and / or be attached to it.
  • the Retaining strip (19) can, however, also over the insulating floor (12) float freely.
  • the retaining tabs (8) are on the Retaining strip (19) attached before the heat conductor in the Pot (11) is used.
  • Fig. 27 shows a configuration similar to Figs. 10 and 12 of the inner holding part (19).
  • Base (17 which is fixed to the insulating base (12), Bends (44) of the retaining tabs (8).
  • the bends (44) in the base (17) clamped. 1 are the Base (17) and the holding part (19) strip-shaped.
  • the inner retaining tabs (8) on lie in a circle are the base (17) and that Holding part (19) correspondingly circular.
  • This ring-shaped Carrier and the holding bar (19) can be a form one-piece molding.
  • the sewing takes place before the insertion of the heating conductor in the pot (11) or the insulating floor (12). The sewn on the molding
  • the heating conductor is then used as a prefabricated assembly in the Pot (11) or placed on the insulating base (12), wherein all retaining straps are fixed in their desired position. Then the ring part (15) can be put on.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Surface Heating Bodies (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Central Heating Systems (AREA)

Claims (22)

  1. Corps chauffant radiant pour une zone de cuisson, en particulier une zone de cuisson en vitrocéramique, comportant un conducteur chauffant et un fond isolant (12) au-dessous du conducteur chauffant, le conducteur chauffant étant découpé dans une feuille métallique, suivant un dessin géométrique et s'étendant entre la zone de cuisson et le fond isolant (12) et formant des ponts chauffants (1) dont l'épaisseur est sensiblement inférieure à leur largeur et dont la grande surface est tournée vers le haut, et les ponts chauffants (1) étant maintenus au moins sur un bord annulaire extérieur (13) du fond isolant (12), caractérisé en ce que la face inférieure des ponts chauffants (1), tournée vers le fond isolant (12), s'étend au moins librement à distance, au-dessus du fond isolant (12), en ce que sur la feuille métallique, dans le plan du dessin géométrique, sont formées des pattes de maintien (2, 4, 8), en ce que les pattes de maintien (2), formées en des emplacements situés à l'extérieur du dessin géométrique, sont maintenues sur le bord annulaire extérieur (13) du fond isolant (12) au moyen d'une pièce de maintien (15) du fond isolant (12), en ce que les pattes de maintien intérieures (8) sont formées en des emplacements situés à l'intérieur du dessin géométrique du conducteur chauffant et sont fixées à un socle ou barrette (17) du fond isolant (12) au moyen d'une pièce de maintien (19) qui est maintenue sur le socle ou barrette (17), et en ce que les pattes de maintien intérieures et/ou extérieures (2, 8) sont maintenues par friction et/ou par complémentarité de forme sur les pièces de maintien (15, 19).
  2. Corps chauffant radiant selon la revendication 1, caractérisé en ce que les pattes de maintien intérieures (8) sont enfichées à travers des fentes (42) de la pièce de maintien (19) et sont repliées vers ses côtés larges.
  3. Corps chauffant radiant selon la revendication 1, caractérisé en ce que sur les pattes de maintien (2, 4, 8) sont formés des soyages (21) et/ou des griffes qui s'engagent dans la matière du fond isolant (2) et/ou de la piece annulaire (15) et/ou de la pièce de maintien (19).
  4. Corps chauffant radiant selon la revendication 1, caractérisé en ce que les pattes de maintien (2, 4, 8) sont repliées par rapport au plan du dessin géométrique et s'engagent avec jeu ou de manière flexible dans des renfoncements (24, 25) du fond isolant (2), pour absorber les dilatations thermiques des ponts chauffants (1).
  5. Corps chauffant radiant selon l'une des revendications 1 à 4, caractérisé en ce que les pattes de maintien (2, 4, 8) sont plus larges que les ponts chauffants (1) de manière que leur température de service reste inférieure à la température d'incandescence.
  6. Corps chauffant radiant selon la revendication 1, caractérisé en ce que le bord annulaire extérieur (13) est formé par une zone extérieure (14) surélevée, de forme annulaire, du fond isolant (12) et par une pièce annulaire (15) placée sur cette zone, en matière isolante thermiquement et électriquement, les pattes de maintien extérieures (2) passant entre la zone extérieure (14) et la pièce annulaire (15).
  7. Corps chauffant radiant selon la revendication 1, caractérisé en ce que le socle (17) est formé par une partie formant socle fixée au fond isolant (12), des pattes de maintien intérieures (8) étant repliées et coincées au moyen d'au moins une pièce de maintien (10, 19', 19"), autour d'au moins un bord (17', 17") de cette partie formant socle.
  8. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que les pattes de maintien extérieures (2) se situent sur un cercle périphérique du conducteur chauffant et les pattes de maintien intérieures (8) sur une zone diagonale du conducteur chauffant, et les ponts chauffants (1) s'étendent parallèlement entre eux.
  9. Corps chauffant radiant selon l'une des revendications 1 à 8 précédentes, caractérisé en ce que les pattes de maintien extérieures (2) se situent sur un cercle périphérique du conducteur chauffant et les pattes de maintien intérieures (8) sur au moins un cercle concentrique, les ponts chauffants (1) s'étendant parallèlement deux par deux.
  10. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce qu'une patte de maintien extérieure (2) et une patte de maintien intérieure (8) relient entre eux des ponts chauffants (1) s'étendant parallèlement entre eux deux par deux.
  11. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que les parties repliées (41) des pattes de maintien (2, 8) ont une section transversale profilée et sont enfoncées dans la matière du fond isolant (12).
  12. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que des parties repliées (36) des pattes de maintien extérieures (2) sont coincées entre une surface oblique (34), descendant vers l'extérieur, du fond isolant (12) et une surface oblique (35) correspondante de la pièce annulaire (15).
  13. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que des parties repliées (37) des pattes de maintien extérieures (12) s'engagent dans une découpe (38) de la pièce annulaire (15).
  14. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce qu'à des parties repliées (39) de type crochet des pattes de maintien extérieures (2) est associée une butée (40) de la pièce annulaire (15).
  15. Corps chauffant radiant selon la revendication 1, caractérisé en ce que la pièce de maintien (19) repose sur un socle (17) du fond isolant (12) ou flotte librement au-dessus du fond isolant (12).
  16. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que les pattes de maintien (2, 8) sont cousues à une pièce de maintien.
  17. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce qu'un profilé de section transversale en V ou en U est imprimé dans les ponts chauffants (1).
  18. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que les ponts chauffants (1) sont au moins partiellement ondulés dans la direction longitudinale, perpendiculairement au fond isolant (12).
  19. Corps chauffant radiant selon la revendication 18, caractérisé en ce que les hauteurs des sommets et/ou des creux des ondes et/ou les longueurs d'ondes sont différentes de manière à obtenir une densité de rayonnement différente.
  20. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que sur le dessin géométrique du conducteur chauffant sont formées des connexions électriques (3) qui sont plus larges que les ponts chauffants (1) de manière que leur température de service soit inférieure à la température d'incandescence.
  21. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que le dessin géométrique du conducteur chauffant est composé de plusieurs pièces qui sont découpées dans une feuille métallique plane.
  22. Corps chauffant radiant selon l'une des revendications précédentes, caractérisé en ce que le dessin géométrique du conducteur chauffant est replié dans une forme en méandres droite, qui est découpée dans une feuille métallique plane.
EP97909277A 1996-09-21 1997-09-16 Element chauffant a rayonnement avec conducteur chauffant en feuille metallique Expired - Lifetime EP0927503B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19638640 1996-09-21
DE19638640A DE19638640C2 (de) 1996-09-21 1996-09-21 Strahlungsheizkörper mit einem Metallfolien-Heizleiter
PCT/EP1997/005067 WO1998012899A1 (fr) 1996-09-21 1997-09-16 Element chauffant a rayonnement avec conducteur chauffant en feuille metallique

Publications (2)

Publication Number Publication Date
EP0927503A1 EP0927503A1 (fr) 1999-07-07
EP0927503B1 true EP0927503B1 (fr) 2001-11-28

Family

ID=7806380

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Application Number Title Priority Date Filing Date
EP97909277A Expired - Lifetime EP0927503B1 (fr) 1996-09-21 1997-09-16 Element chauffant a rayonnement avec conducteur chauffant en feuille metallique

Country Status (10)

Country Link
US (1) US6207935B1 (fr)
EP (1) EP0927503B1 (fr)
JP (1) JP2001504261A (fr)
AT (1) ATE209845T1 (fr)
AU (1) AU720572B2 (fr)
CA (1) CA2263937A1 (fr)
CZ (1) CZ98499A3 (fr)
DE (2) DE19638640C2 (fr)
PL (1) PL332274A1 (fr)
WO (1) WO1998012899A1 (fr)

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GB2349059B (en) * 1999-04-16 2003-07-16 Ceramaspeed Ltd Radiant electric heater and method of manufacture
DE10025539A1 (de) * 2000-05-23 2001-11-29 Diehl Ako Stiftung Gmbh & Co Heizeinrichtung für ein Haushaltsgerät
DE10048424A1 (de) * 2000-09-29 2002-04-18 Bsh Bosch Siemens Hausgeraete Heizelement und Verfahren zur Herstellung eines Heizelements
ITPN20010045U1 (it) * 2001-11-19 2003-05-19 Irca Spa Resistenza elettrica corrugata e relativa piastra irradiante.
GB0221519D0 (en) * 2002-09-17 2002-10-23 Ceramaspeed Ltd Radiant electric heater
GB0221520D0 (en) * 2002-09-17 2002-10-23 Ceramaspeed Ltd Electric heater and method of manufacture
GB0610118D0 (en) * 2006-05-11 2006-06-28 Ceramaspeed Ltd Radiant electric heater
JP1541874S (fr) * 2015-03-16 2016-01-18
DE102016225462A1 (de) * 2016-12-19 2018-06-21 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, Kochgerät mit einer Heizeinrichtung und Verfahren zur Herstellung eines Heizelements
DE102018218245A1 (de) * 2018-10-24 2020-04-30 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Elektrokochgerät

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Also Published As

Publication number Publication date
AU4703697A (en) 1998-04-14
ATE209845T1 (de) 2001-12-15
AU720572B2 (en) 2000-06-08
JP2001504261A (ja) 2001-03-27
DE19638640A1 (de) 1998-04-02
US6207935B1 (en) 2001-03-27
DE19638640C2 (de) 2000-11-30
CZ98499A3 (cs) 1999-08-11
PL332274A1 (en) 1999-08-30
WO1998012899A1 (fr) 1998-03-26
DE59705582D1 (de) 2002-01-10
CA2263937A1 (fr) 1998-03-26
EP0927503A1 (fr) 1999-07-07

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