EP0265635B1 - Elément chauffant à radiation - Google Patents

Elément chauffant à radiation Download PDF

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Publication number
EP0265635B1
EP0265635B1 EP87112841A EP87112841A EP0265635B1 EP 0265635 B1 EP0265635 B1 EP 0265635B1 EP 87112841 A EP87112841 A EP 87112841A EP 87112841 A EP87112841 A EP 87112841A EP 0265635 B1 EP0265635 B1 EP 0265635B1
Authority
EP
European Patent Office
Prior art keywords
light source
radiant heater
top plate
heating resistor
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.)
Revoked
Application number
EP87112841A
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German (de)
English (en)
Other versions
EP0265635A1 (fr
Inventor
Gerhard Gössler
Eugen Wilde
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 Gerate Blanc und Fischer 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
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Application filed by EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT87112841T priority Critical patent/ATE77030T1/de
Publication of EP0265635A1 publication Critical patent/EP0265635A1/fr
Application granted granted Critical
Publication of EP0265635B1 publication Critical patent/EP0265635B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • 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 arrangement on the inside of a cover plate, in particular made of glass ceramic, with a support for at least one elongated heating resistor, lying essentially in a plane approximately parallel to the cover plate on a front side facing the cover plate, in particular an essentially exposed heating coil. and with an electrical light source connected as an additional display device, which is provided within the outer circumference of the carrier.
  • a radiant heater has become known in which the display light source formed by an electric bulb bulb is relatively deep below the plane the heating resistor is arranged so that there is a very large height for the radiant heater.
  • Another disadvantage of this known design is that the lighting effect caused by the light source and thus the display effect caused is relatively weak, which in particular with high room brightness leads to the fact that the display state can not be recognized even if a relatively complex refector for the Light source is used.
  • Another major disadvantage of the known design is that the bulb is hardly accessible for replacement, which is why replacement is hardly possible after the initial failure of this bulb and therefore the display device is shut down for the remaining life of the associated cooker.
  • a temperature sensor is a component which is designed from the outset to accommodate relatively high temperatures and to which completely different demands are made than on a light source of a display device.
  • DE-A1-3 237 849 shows a display for the operating state of an electrical device which can be controlled both with alternating current and with direct current, so that four different signals are available.
  • a special structural arrangement of the indicator lamp is not apparent from this document.
  • a switching of the light source of the display device is provided so that the brightness is changed in proportion to the temperature of the cover plate.
  • DE-A1-2 938 257 shows a control device for displaying residual heat in the hotplates of a stove, for which a signal lamp and an operating lamp are provided.
  • DE-A1-3 108 640 shows a signaling device for displaying the temperature state of cooking appliances, which has an indicator lamp which is supplied by an independent power supply line.
  • the invention has for its object to provide a radiant heater of the type mentioned, which allows a clearly visible display of the display device with a simple and compact structure.
  • a radiant heater of the type described at the outset according to the invention in that at least one light source is arranged at least approximately reaching into the region of the level of the heating resistor.
  • the light source can be arranged essentially completely within the space enclosed by a flat outer shell of the carrier and the cover plate and at a smaller distance from the cover plate compared to its width, for example directly adjacent to the inside of the cover plate, so that essentially the full luminosity of the Light source is available for display.
  • the inventive design makes it possible to arrange the light source so that only indirect light is visible in the display or in the translucent cover plate and no glare from the bulb.
  • the side of the light source facing the cover plate for example the The cap of the associated lamp bulb can be provided with an optionally hood-shaped cover attached to it, for example by pushing it on, or with a reflective coating applied as a layer.
  • the cover can be translucent in the manner of a light filter, so that the area of the cover plate opposite it is also illuminated and does not appear as an unilluminated, for example black zone.
  • the light source is expediently arranged in such a way that it illuminates the cover plate in the area of the entire field delimited by the inner circumference of the carrier, possibly without gaps.
  • the design according to the invention is particularly suitable for those radiant heaters in which the heating coils consist of essentially bare exposed resistance wire, for example of a chromium, iron, aluminum alloy, it also being conceivable for at least one switchable heating circuit to be provided by a high-temperature radiator, how a quartz bulb-encapsulated heating lamp is formed.
  • Such single-, two- or multi-circuit radiant heaters are very easy to manufacture, in particular if their heating circuits are formed exclusively by bare exposed heating coils, and they have a high level of functional reliability and a long service life.
  • the heating coils only glow for a while after being switched on, whereby there are considerable time differences depending on the radiator structure, cross-section of the resistance wire and its specific load.
  • the display device according to the invention is suitable.
  • the display device according to the invention is also suitable, for example, for displaying the hot state of the hob after it has been switched off until the cover plate has cooled to such an extent that contact is no longer dangerous.
  • the radiant heater according to the invention is also for others Heating systems, for example the heating of a baking muffle, are suitable, in which case the cover plate at least partially forms a muffle wall, for example the upper or as lower heat the lower muffle wall.
  • a radiant heater 1 which is, for example, axially symmetrical with respect to a central axis and which is round, circular or polygonal in view is assigned to a cover plate 2 made of translucent glass ceramic.
  • the cover plate 2 can have a size corresponding to the radiant heater 1 and form a self-contained structural unit with the radiant heater 1 or it can be significantly larger than the radiant heater 1, so that it can be equipped, for example, to form two or more separate or different hob sizes with two or more arranged on the inside 3, jointly and / or separately switchable radiant heaters 1, which can then be equipped are pressed side by side against the inside 3 of the cover plate 2, the edge of which is received, for example, in a support frame.
  • the flat-shell-shaped radiant heater 1 the overall height of which corresponds, for example, to at most only a quarter, in particular approximately one-sixth of its width, has a flat-shell-shaped carrier 4 for an electric heating element, namely a heating resistor 5.
  • the elongated heating resistor 5, laid in at least one spiral shape, is formed by one, two or more heating coils 6, 7 which are switched on individually or together, depending on the desired output.
  • the carrier 4 has an outer carrier shell 8 made of sheet metal or the like, which extends with its edge at a short distance to the inside of the cover plate 2, but is also essentially rimless as a simple base plate can.
  • an insulating body 9 designed as a shaped body is arranged with its flat rear side lying essentially over the entire surface, which essentially consists of ceramic fiber and is produced, for example, by pressing.
  • the carrier shell 4 also has one on the outer circumference Insulating material existing, for example made of ceramic fiber and on the heating resistor 5 against the cover plate 2 projecting edge 11, which is formed in one piece with the insulating body 9 and bears against the inner circumference of the edge of the carrier shell 8 in the illustrated embodiment.
  • the end face of the edge 11 is pressed against the inside 3 of the cover plate 2, essentially over the entire surface, and delimits the associated hob with its inner circumference.
  • the radiant heater 1 is provided with a display device 12 which has a light source 13 as a display element.
  • this light source 13 can have the same nominal voltage as the heating resistor 5, it is expediently formed by a low-voltage lamp of 6 or 12 volts, since this can be made very compact.
  • the light source 13 has at least one miniature version of a halogen bulb 14, the central axis of the lamp advantageously being approximately at right angles to the cover plate 2 and preferably at least approximately in the central axis of the radiant heater 1.
  • the halogen bulb 14 has a filament 15 which is transverse to its central axis and is provided at its rear end with a squeeze base 17 of the bulb 16 which is reduced in width.
  • This pin base 17 leads lugs of the filament 15 parallel to each other and parallel to the central axis to the outside, the outer parts of the lugs forming connector lugs for the electrical connection of the light source 13.
  • the total length of the piston 16 and thus of the actual bulb body is only slightly greater than twice the length of the squeeze base 17 and only slightly, for example approximately one third longer than the largest width of the piston 16, which is at its front end in a central, knob-shaped elevation , the so-called pump nozzle, runs out. Furthermore, the total length of the piston 16 is approximately in the order of the thickness of the carrier 4 in the region of the heating resistors.
  • a socket 18 is provided in the central axis thereof and has sockets for receiving the plug-in lugs of the bulb.
  • the socket 18 is easily removable towards the back of the carrier 4 in a holder of the carrier 4, which is essentially formed by a socket-shaped plug collar 19, which is formed from the bottom of the carrier shell 8 and in the insulating part of the carrier 4, namely engages in the thermal insulation 10.
  • the heating resistor 5 or the heating coils 6, 7 lie essentially in a common central plane 20 which is perpendicular to the central axis of the radiant heater 1 and which is only slightly offset from the front plate 21 in the area of the heating resistor 5 in relation to the cover plate 2, since the heating coils 6, 7 are fastened to the carrier 4 and secured in their position by, for example, partial embedding of longitudinal sections in the insulating body 9.
  • the light source 13 or the bulb extends both to the cover plate 2 and to the rear 22 of the carrier 4 towards both sides beyond this plane 20, which passes through the piston 16 forming the cavity for the filament 15 in such a way that the filament 15 is offset slightly from the plane 20 in the direction of the cover plate 2.
  • the filament 15 is therefore between the plane 20 or the front 21 and the inside 3 of the cover plate 2, but closer to the front 21 of the insulating body 9.
  • a part of the piston 16 is thus inside the insulating body 9, while the crimp base 17 is completely inner is half of the insulating part of the carrier 4, for example so that the parting plane between the insulating body 9 and the thermal insulation 10 goes approximately through the middle of the length of the crimp base 17.
  • the electrical connection of the light source 13 is also essentially entirely within the carrier 4 or within its insulating part, wherein it is provided in the thermal insulation 10 in the illustrated embodiment.
  • the Socket 18 rests with an annular collar projecting over its outer circumference on the rear side 22 of the carrier 4 or the carrier formwork shell 8, so that the socket 18 projects beyond this rear side 22 only by the extremely small thickness of this annular collar. But it is also conceivable that the jack 18 lies completely within the thickness of the carrier 4, that is, does not protrude beyond the rear side 22 thereof.
  • a cover 23 is provided between the light source 13 and the cover plate 2, which in the exemplary embodiment shown is made thinner by a cover plate 2 that is thinner than the cover plate 2.
  • flat and, for example, circular cover plate 24 is formed.
  • This cover plate 24 is in turn either uniform over its surface or increasingly translucent or translucent from the center to the outside, so that the cover plate 2 is also illuminated by the light source 13 in its area.
  • the cover 23 preferably has a gap distance from the inside 3 of the cover plate 2, but could also be in contact with this inside 3 if necessary over a small area or over the entire area.
  • the cover 23 can also be provided in a contact-free manner with respect to the light source 13 or the piston 16, but it is also possible for the light cell 13 or the piston 16 to approach the cover 24 approximately until it comes into contact with its pump nozzle, so that the latter in exceptional cases without the use of any glue or other additional fastening means between the light source 13 and the cover plate 2 can be kept essentially free of play.
  • the cover 23 expediently consists of an at least slightly pressure-elastic material, so that it can, if necessary, be held with a certain elastic tension.
  • the cover 23 consists of an insulating material that contains, for example, ceramic fiber, in particular the same insulating material as the molded body 9, that is to say that the cover 23 can be produced by pressing and then drying.
  • the light transmittance can be changed over the entire surface or in the manner of patterns, so that watermark-like symbols or the like can also be provided.
  • a light guide device 25 is provided, which essentially consists exclusively of the shape of the molded body 9, for example at least slightly reflecting on the surface, and possibly by the associated surface of the cover 23 can be formed.
  • the molded body 9 has a bump 26 which surrounds the light source 13 in a ring and protrudes slightly beyond the front side 21, the outer circumference of which, with a concave cross section, merges with the front side 21, the end face of this bump 26 lying in one plane, which is set back only very slightly with respect to the filament 15.
  • the light-guiding device 25 is expediently designed such that the light is directed primarily toward the outer edge 11 surrounding the heating resistor 5.
  • a cooling device 27 is provided for the light source 13, this cooling device being provided in particular for the relatively temperature-sensitive crimp base 17 and being designed such that it Squeeze base 17 is not heated above the permissible level of approx. 350 ° Celsius for the bulb.
  • the through opening for the light source 13 in the insulating parts of the carrier 4 in such a way that the light sources or the piston 16 approximately at least over part of its length, in particular in the region of a linear ring zone of the insulating material, of at least one of the insulating parts touching is included; this ring zone could be provided in particular at the end of the through opening facing the cover plate 2 and thus in the area of the bulb 16 in the immediate vicinity of the filament 15, so that the part of the bulb 16 behind it is virtually sealed off from the space accommodating the heating resistor 5.
  • a shaft 28 which is further than the bulb, so that the bulb is completely non-contact with the insulating parts in the shaft 28 which is coaxial, for example cylindrical, the width of which, for example, is half larger than the largest width of the Piston 16 and the same extent as the outer circumference of the plug collar 19, so that it can engage in the shaft 28.
  • the socket 18 is also air-permeable in the longitudinal direction of the through-opening, for example as a result of openings, at least a small amount of air circulation can develop in the shaft 28, which contributes to sufficient cooling of the bulb.
  • the metal plug-in collar 19 engaging in the through opening also contributes more or less to cooling, depending on the diameter and length, since it absorbs the heat absorbed in the through opening relatively quickly to the outside in the large base of the carrier shell, which is well shielded from direct heating by the insulating parts can forward.
  • the plug-in collar 19 can also be provided with surface-enlarging heat exchange profiles, for example ribs projecting inwards, whereby an increase in its heat absorption capacity can be achieved.
  • the jack 18 suitably consists of a ceramic material, for example steatite.
  • Fig. 2 the same reference numerals as in Fig. 1, but with the index "a" are used for corresponding parts. While in the embodiment according to FIG. 1, between the cover 23 and the insulating body 9 or the hump 26, an annular light passage slot for the one emanating from the light source 13 extends continuously over the circumference 2, the cover 23a according to FIG. 2 has a jacket which surrounds the light source 13a or the bulb at a distance in a ring, which expediently starts from the front 21a of the insulating body 9a and is preferably formed in one piece therewith from the same material.
  • This sheath which increases in thickness downward through the shape of a truncated cone, is provided with light passage openings 29 lying approximately parallel to the cover plate 2a and extending at least over part of its length, whereby instead of, as also conceivable, only a single light passage opening expediently a plurality of light passage openings over the entire Circumference are evenly distributed.
  • the light passage openings 29 expediently lie approximately in the plane of the filament 15a.
  • the cover plate 24a is formed in one piece with the cover jacket, so that the cover 23a is cup-shaped or hood-shaped over the light source 13a.
  • the cover 23a is at a small distance from the cover plate 2a, so it is contact-free. In special cases, the cover 23a could be used to dampen the impact of the cover plate 2a in the area of the associated field zone, in particular the central field zong of the associated hob and thus to protect the cover plate 2a against damage caused by impact stresses.
  • the cooling device 27a has a funnel or truncated cone-shaped shaft 28a towards the rear 22a of the carrier 4a, the funnel-shaped expansion extending approximately over the entire thickness of the thermal insulation 10a and thus essentially over the entire length of the crimp base 17a.
  • the funnel-shaped extension is delimited by the shaft collar 19a, which extends with a cylindrical end collar into the inner circumference of the insulating body 9a or the jacket of the cover 23a and lies against this inner circumference.
  • the cone angle of the funnel-shaped extension can be, for example, approximately 90 °.
  • the jack 18a is not directly on the carrier shell 8a, but on a ge arranged special support member 30, which extends into the area of the shaft 28a and near the outer periphery of the carrier 4a on the carrier shell 8a is easily detachably fastened, for example with a screw.
  • the support part 30 and with it the light source 13a can be easily detached from the area of the outer circumference of the carrier 4a and removed as a whole, so that the bulb can then be replaced very easily.
  • the support part 30 is formed, for example, by a sheet metal strip, which can have a bent outer end, which engages in a corresponding edge shoulder set apart from the rest of the base of the carrier shell 8a relative to the cover plate 2a and is fastened to this edge shoulder with the screw or the like.
  • the plug-in socket 18a is fastened to the other end of the sheet-metal strip which rests resiliently on the rear side 22a of the carrier shell 8a and projects freely in the manner of a cantilever arm from its fastening point.
  • the light source 13b can be connected directly to the switching contacts 31 for the heating resistor 5b, so that no separate contact for actuating the display device is required. If the nominal voltage of the light source 13b is lower than that of the heating resistor 5b, the latter can be used in the manner of a potentiometer to tap the voltage for the light source 13b.
  • the voltage tap that is to say the connection of the two lines for the light source, is expediently not carried out directly on the respective heating coil, but expediently according to FIG.
  • a connecting pin 32 which is either at the end of one or between the ends of two heating coils which connect in series or in Connection area of the heating coil is provided and is advantageously attached in any case so that it engages in a section of the heating coil in which a plurality of the windings are provided close to one another and on which the connecting pin 32 with an angled end section, for example, is fixed by spot welding or the like so that this end section engages in the inner circumference of the helical shape.
  • the connector pin 32 can at least partially penetrate the insulating parts of the carrier 4, the associated supply line to the jack 18 being fastened at its end. This feed line can thus also be laid within the carrier 4.
  • the radiant heater 1 or 1a or 1b is assigned a further, automatically temperature-dependent or clocking switching contact 34, which is arranged between the manually operated contact 31 and the heating resistor 5b in a supply line is.
  • This switch contact 34 which is assigned, for example, a temperature monitor or overheating protection, is influenced by a temperature sensor 35 or 35a or 35b, which can be designed as a rod-shaped expansion sensor arranged directly on the housing of the switch contact 34;
  • Such an expansion sensor has, for example, two telescopically arranged rods of different expansion coefficients, namely an outer tube fixedly arranged on the housing of the switch contact 34 and an inner rod with its outer end axially supported on the outer tube in the area of its free end, the one in the housing of the switch contact 34 projecting other end acts directly on a pressure point of the switch contact designed as a snap switch.
  • the temperature sensor 35 or 35a or 35b is in the area of the center of the heating resistor 5 or the hob between the front 21 of the carrier 4 and the inside 3 of the cover plate 2 with respect to these or all Parts arranged without contact and parallel to the cover plate. It is located directly adjacent to the outer circumference of the cover 23 or 23a and closer to the cover plate 2 than to the front 21 of the carrier 4, being essentially tangential to a circle placed around the central axis of the radiant heater 1 or 1a, the diameter of which is approximately in the order of the diameter of the smallest spiral turn of the heating resistor 5 or 5a or, on the other hand, is smaller and slightly larger than the diameter of the cover 23 or 23a .
  • the temperature sensor 35 lies in the region of one side of the ring-shaped light exit slot.
  • the temperature sensor 35 passes through the edge 11 of the insulating body 9 and the edge of the carrier shell 8 of the carrier 4, the switch housing or the switching head of the temperature-dependent switching contact 34 being provided directly on the outside of this edge and on the same.
  • the light source 13b is switched on and off in the working cycle of the switch contact 34.
  • the switch contact 31 according to FIG. 3 is, for example, part of an electrical actuation device 36 for the radiant heater 1b, which is designed as an on and off switch or as a multi-cycle switch.
  • This actuating device 36 can be actuated by hand, for example, via an actuating button 37 arranged at the end of a control shaft.
  • the actuating device 36c can also be a temperature controller instead of a power control device or a clocking switch, the switching contact 31c thereof for the heating resistor 5c as a function of the target temperature set with the actuating button 37c via a temperature-dependent sensor system, in particular a hydraulic expansion system in and out is turned off.
  • This sensor system has, for example, a tubular temperature sensor 38, which is arranged in the heating region of the heating resistor 5c and is filled with an expansion liquid and is connected via a capillary line 39 to an expansion element 40, for example a pressure cell of the actuating device 36, which acts on the switching contact 31c.
  • the actuating device 36 also has a signal contact 41, which is designed as an on / off switch and is closed except in the "zero" position of the selector shaft. This signal contact 41 lies in one of the two feed lines to the light source 13c.
  • the light source 13c can also be controlled via a hot-signal contact 42, which is expediently assigned in parallel connection to the same feed line as the signal contact 41.
  • The preferably influenced by the same temperature sensor as the switching contact 34 and in this respect formed by a further contact of the same switching head, is affected by the associated temperature sensor so that it is only open below a predetermined temperature of the radiant heater and is otherwise closed. If the signal contact 41 is opened by switching off the radiant heater while it is still hot, the hot signal contact 42 remains closed until the radiant heater or the associated hob of the cover plate 2 has cooled down, and the light source 13c is thus still present and lit despite the signal contact 41 being open.
  • the hot-signaling contact 42 Only when the temperature falls below the predetermined temperature does the hot-signaling contact 42 also open, so that the light source 13c then goes out.
  • the light source 13c indicates the switched-on state of the heating resistor 5c or only the hot state of the hob
  • separate voltages are generated via the two leads, on the one hand the signal contact 41 and on the other hand the hot alarm contact 42, in particular via the lead of the hot signaling contact 42 led to a lower voltage.
  • the light source 13c shines brighter for differentiation in one case and less brightly in the other case.
  • a diode 43 can be easily connected to the associated supply line as a voltage reducer.
  • a voltage supply separate from the heating resistor 5c is provided for the light source 13c, which is in the low-voltage range of 6 or 12 volts, for example, and is connected to the mains via a suitable voltage reducer.
  • a transformer 44, a simple phase control or capacitors can be used as series resistors as voltage reducers.
  • the signal contact 41d and the hot alarm contact 42d can also switch separate light sources or separate bulbs or separate filaments 15d, which are arranged in the manner of a two-filament lamp in a common bulb 16d. With each of these designs, there is the possibility of a very good distinction between the hot alarm state and the on state of the heating resistor.
  • the peripheral edge of the cover 23a can also be made thin-walled, possibly without separate light breakthroughs, that it is sufficiently translucent to ensure good illumination of the heating field. If light passage openings are provided, these can act as ventilation openings for the lamp room.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)
  • Power Steering Mechanism (AREA)

Claims (13)

  1. Elément thermique à rayonnement (1) à placer sur la face intérieure (3) d'une plaque de couverture (2) en particulier en vitrocéramique, comprenant un support (4) pour au moins une résistance chauffante (5) allongée, en particulier un boudin (6, 7) sensiblement dénudé, étendue en longueur autant dire dans un plan (20) plus ou moins parallèle à la plaque de couverture (2) sur une face avant (21) orientée vers la plaque de couverture (2), et une source lumineuse (13) électrique connectée en tant que dispositif indicateur (12) supplémentaire prévue à l'intérieur de la surface extérieure du support (4), caractérisé en ce qu'au moins une source lumineuse (13) de ce genre s'étend pratiquement jusque dans la zone du plan (20) de la résistance chauffante (5).
  2. Elément thermique à rayonnement suivant la revendication 1, caractérisé en ce que la source lumineuse (13) forme une saillie au moins par rapport au plan de la face avant (21) du support (4) et en ce que de préférence au moins un filament incandescent (15) à blindage translucide de la source lumineuse (13) occupe une position intermédiaire entre cette face avant (21) et la plaque de couverture (2), en particulier plus près de la face avant (21).
  3. Elément thermique à rayonnement suivant la revendication 1 ou 2, caractérisé en ce qu'entre la source lumineuse (13) et la plaque de couverture (2) est disposée une garniture (23) adjacente à au moins l'un des deux éléments formés par la plaque de couverture (2) et la source lumineuse (13), plus grande que le diamètre extérieur de la source lumineuse (13), qui est réalisée en particulier au moins partiellement en forme de plaque et présente une épaisseur maximale à peu près égale à celle de la plaque de couverture (2).
  4. Elément thermique à rayonnement suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'une garniture (23) présente un rebord entourant au moins partiellement la source lumineuse (13a), est réalisée sous forme de hotte et présente au moins une ouverture (29) de passage de la lumière, de préférence en son rebord.
  5. Elément thermique à rayonnement suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'une garniture (23, 23a) pour la source lumineuse (13, 13a) est fabriquée en matière isolante à base de fibres céramiques, par exemple dans la même matière qu'un corps isolant (9a) du support (4a) qui porte la résistance chauffante (5a), et est réalisée de préférence d'un seul tenant avec le corps isolant (9a).
  6. Elément thermique à rayonnement suivant l'une quelconque des revendications précédentes, caractérisé en ce que la source lumineuse (13) est formée par une lampe à faible intensité, en particulier une ampoule halogène (14) agencée à angle droit par rapport à la plaque de couverture (2), enfoncée avec un socle dans une douille (18) qui ne dépasse que très légèrement, au maximum, de la face arrière (22) du support (4).
  7. Elément thermique à rayonnement suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'est prévu un dispositif de refroidissement (27) de la source lumineuse (13) qui présente au moins une cheminée d'aération (20) et dont la cheminée (28) enveloppe avec un certain espacement la source lumineuse (13), traverse le support (4) de la face arrière (22) à la face avant (21) et a une section transversale qui va en s'évasant dans la direction de la face arrière (22a) du support (4a).
  8. Elément thermique à rayonnement suivant l'une quelconque des revendications précédentes, caractérisé par un dispositif de guidage de la lumière (25) destiné à la source lumineuse (13), qui est adapté pour orienter la lumière dans au moins l'une de deux directions définies par une direction plus ou moins parallèle à la plaque de couverture (2) et par une direction allant vers la surface intérieure d'un rebord (11) du support enveloppant la résistance chauffante (5) et s'étendant au moins approximativement jusqu'à la plaque de couverture (2), et en ce que le dispositif de guidage de la lumière (25) est réalisé de préférence par profilage du corps isolant (9).
  9. Elément thermique à rayonnement suivant l'une quelconque des revendications précédentes, caractérisé en ce que la source lumineuse (13b) est commutée directement avec les contacts de commutation de commande (31) pour la résistance chauffante (5b) et est couplée en parallèle à la résistance chauffante (5b), au moins une prise de tension, en particulier en forme de potentiomètre, étant prévue directement sur la résistance chauffante (5b).
  10. Elément thermique à rayonnement suivant l'une quelconque des revendications précédentes, caractérisé en ce que la source lumineuse (13c) est commutée avec au moins un contact secondaire distinct des contacts de commutation de commande (31c) pour la résistance chauffante (5c), c'est-à-dire au moins l'un des contacts qui consistent en un contact de signalisation (41) à activer avec le commutateur de mise en marche (36c) et en un contact de signalisation de montée en chaleur (42) activé par une sonde de température.
  11. Elément thermique à rayonnement suivant l'une quelconque des revendications précédentes, caractérisé en ce que la source lumineuse (13c, 13d) est commutée suivant au moins deux paliers de clarté différente, un palier de clarté étant de préférence commandé par la résistance chauffante (5c), et l'autre par le contact de signalisation de montée en chaleur (42) installé dans une conduite montée en parallèle avec le contact de signalisation (41).
  12. Elément thermique à rayonnement suivant la revendication 11, caractérisé en ce qu'un palier de clarté, en particulier celui commandé par le contact de signalisation de montée en chaleur (42 ou 42d) présente une intensité lumineuse du même filament commandée par une diode (43) ou similaire, inférieure à celle de l'autre palier de clarté.
  13. Elément thermique à rayonnement suivant la revendication 11 ou 12, caractérisé en ce que deux paliers de clarté sont destinés à des filaments (15d) distincts qui sont disposés de préférence dans une ampoule (16d) commune de la source lumineuse (13d) matérialisée par une lampe à plusieurs filaments.
EP87112841A 1986-10-17 1987-09-03 Elément chauffant à radiation Revoked EP0265635B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112841T ATE77030T1 (de) 1986-10-17 1987-09-03 Strahlheizkoerper.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3635345 1986-10-17
DE19863635345 DE3635345A1 (de) 1986-10-17 1986-10-17 Strahlheizkoerper

Publications (2)

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EP0265635A1 EP0265635A1 (fr) 1988-05-04
EP0265635B1 true EP0265635B1 (fr) 1992-06-03

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ID=6311909

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Application Number Title Priority Date Filing Date
EP87112841A Revoked EP0265635B1 (fr) 1986-10-17 1987-09-03 Elément chauffant à radiation

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US (1) US4794233A (fr)
EP (1) EP0265635B1 (fr)
AT (1) ATE77030T1 (fr)
DE (2) DE3635345A1 (fr)
YU (1) YU191087A (fr)

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ES2112285T3 (es) * 1991-11-07 1998-04-01 Bosch Siemens Hausgeraete Dispositivo de control para hervidores.
US5572205A (en) * 1993-03-29 1996-11-05 Donnelly Technology, Inc. Touch control system
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DE19802571C2 (de) * 1998-01-23 2000-12-21 Bsh Bosch Siemens Hausgeraete Kochmulde mit Anzeigeelementen
EP2106196B1 (fr) * 1999-12-02 2017-04-26 Panasonic Corporation Dispositif de cuisson avec chauffage par induction
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DE10065215A1 (de) * 2000-12-28 2002-07-04 Bsh Bosch Siemens Hausgeraete Gargerät
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KR101510380B1 (ko) * 2008-03-25 2015-04-14 엘지전자 주식회사 조리기기 및 그 제어방법
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Also Published As

Publication number Publication date
DE3779559D1 (de) 1992-07-09
YU191087A (en) 1990-04-30
ATE77030T1 (de) 1992-06-15
US4794233A (en) 1988-12-27
DE3635345A1 (de) 1988-04-28
EP0265635A1 (fr) 1988-05-04

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