EP0373706A2 - Radiant heating element for cooking devices - Google Patents

Radiant heating element for cooking devices Download PDF

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Publication number
EP0373706A2
EP0373706A2 EP89203123A EP89203123A EP0373706A2 EP 0373706 A2 EP0373706 A2 EP 0373706A2 EP 89203123 A EP89203123 A EP 89203123A EP 89203123 A EP89203123 A EP 89203123A EP 0373706 A2 EP0373706 A2 EP 0373706A2
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EP
European Patent Office
Prior art keywords
hotplate
radiator
reflector
edges
edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89203123A
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German (de)
French (fr)
Other versions
EP0373706B1 (en
EP0373706A3 (en
Inventor
Walter Braun
Reinhard Dr. Kersten
Heinz Körver
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.)
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
Original Assignee
BAUKNECHT HAUSGERATE GmbH
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
Whirlpool International BV
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Filing date
Publication date
Priority claimed from DE19883842033 external-priority patent/DE3842033A1/en
Application filed by BAUKNECHT HAUSGERATE GmbH, Bauknecht Hausgeraete GmbH, Whirlpool Europe BV, Whirlpool International BV filed Critical BAUKNECHT HAUSGERATE GmbH
Priority to AT89203123T priority Critical patent/ATE93674T1/en
Publication of EP0373706A2 publication Critical patent/EP0373706A2/en
Publication of EP0373706A3 publication Critical patent/EP0373706A3/en
Application granted granted Critical
Publication of EP0373706B1 publication Critical patent/EP0373706B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B3/744—Lamps as heat source, i.e. heating elements with protective gas envelope, e.g. halogen lamps

Definitions

  • the invention relates to a radiant heater for cooking appliances with a hotplate, in particular in the form of a glass ceramic plate, and with at least two rod-shaped radiators which run parallel to one another, e.g. B.
  • Halogen lamps which are arranged between the hotplate and associated reflectors, each reflector, forming a raised edge in the area of the radiator, has two abutting partial parabolic surfaces with raised outer edges, and the parts mentioned are arranged such that the above each radiator lying area of the hotplate is mainly hit by direct radiation and the outer areas are mostly hit by reflected radiation, according to patent application P 37 23 077.8.
  • a radiant heater in which a circular housing is provided under a hotplate, in which two halogen lamps, each with an associated reflector, are fastened. It has been shown that the largely parallel and straight bend edges below the spotlights, ie the halogen lamps, together with the round border certain places lead to an undesirable increase in power density. These locations lie once in the center of the circular arrangement, i.e. .H. in the middle between the two halogen lamps, and on the other hand in the two outside corners outside the halogen lamps, where their imaginary extension meets the circular border. Furthermore, the radiation density in all four zones of the boundary, which lie between the four points mentioned with the undesirable increase in the power density, is lower than desired.
  • the invention has for its object to design a radiant heater of the type mentioned in such a way that the radiation density is distributed as uniformly as possible over a circular plate.
  • This object is achieved according to the invention in that the halogen lamps are located in a reflector trough which is closed on all sides and in that the bent edges assigned to the halogen lamps, lying in a plane parallel to the hotplate, are curved outwards in such a way that the projection of a folded edge and an associated halogen lamp on the hotplate there are two interfaces in the end area of the halogen lamp.
  • the radiation is influenced by such a configuration of the fold edge or fold line in such a way that the radiation density is reduced in the center and in the outer gussets of the radiator ends and the radiation density is increased in the edge regions which lie between the mentioned outer gussets.
  • An advantageous embodiment is characterized by a circular reflector trough with two halogen lamps, the location of the smallest distance between the two circular arc-shaped folding edges being in the middle between the two halogen lamps and with each folding edge at its ends, after passing under the halogen lamp in its end regions, into the Trough wall runs out.
  • a circular reflector trough with the aforementioned folding edges designed according to the invention enables an optimal distribution of the radiation energy with little effort.
  • a preferred embodiment of the invention is that the fictitious interfaces between the fold edges and the respective ends of the halogen lamps are in the last quarter of the halogen lamps.
  • 1a and 1b show a radiant heater 10 with a housing 11 and with two halogen lamps 12 which are arranged between two reflectors 13, 14 and the hotplate 15.
  • the reflectors 13, 14 are each formed from two partial parabolic surfaces 13 ', 13 ⁇ and 14', 14 ⁇ and have two folding edges 13a, 14a, which run parallel to the halogen lamps 12 at a constant distance.
  • the reflectors 13, 14 run out into the conical edge boundary in the outer region.
  • the measured power distribution has shown that the largely parallel and straight fold edges 13a, 14a below the radiators 12 together with the round edge limitation of the housing 11 at the points 16a and 16b lead to an undesirable increase in the power density (+).
  • the point 16a lies in the center of the hotplate, and the points 16b lie in the outer gussets of the ends of the radiators 12. In contrast, in the edge zones 16c and 16d lying between these points, the radiation density is lower than desired (-).
  • 1b schematically shows a cross section through the center of the known radiator according to FIG. 1a.
  • Fig. 2 shows the radiant heater 10 with its housing 11 and the two parallel rod shaped halogen lamps 12.
  • the reflectors specially designed according to the invention are designated, the buckling edges 17a, 18a of which are designed in the shape of a circular arc and, viewed from above, each form two fictitious interfaces 19, 20 with the halogen lamps 12.
  • the curved folding edges 17a, 18a have the smallest mutual distance 21 in the middle between the two halogen lamps 12.
  • the projection of the halogen lamps 12 and the folding edges 17a, 18a onto the hob 15 results, measured at right angles to the halogen lamps 12, on this side of the halogen lamps being the largest mutual distance 22, 23 and beyond the halogen lamps 12 a greatest mutual distance 24, 25.
  • the schematic course of the reflectors 17 and 18 with their kinked edges 17a, 18a can be seen from the sectional images shown in FIGS. 3 and 4.
  • Each reflector 17, 18 has two partial parabolic surfaces 17 ', 17 ⁇ and 18', 18 ⁇ , which merge into one another at the folding edges 17a, 18a.
  • the radiation course belonging to these figures and the radiation distribution can be seen from FIGS. 5 and 6.
  • With 26 the radiation course and with 27 the respectively achievable radiation distribution in the area of the lamp center according to section A-A and in the area of the lamp ends according to section B-B is shown.
  • Such an asymmetrical course of the reflectors 17, 18 results in a radiation distribution which has been corrected with regard to the irregularities mentioned in the marginal zones and in the middle. 5, the radiation density 27a is increased in the region of the edge zones 16c. 6, the radiation density 27b is increased in the middle of the plate at the end of the lamp in the region of the edge zone 16d.

Abstract

A radiant heating element for cooking devices having a cooking plate constructed in particular as a glass ceramic plate has preferably two halogen lamps to which in each case a reflector is assigned, each reflector having a bending edge rising in the direction of the halogen lamp, which bending edge, according to the invention, is bent outwards in a circular arc shape extending in a plane parallel to the cooker plate, the projection of a halogen lamp producing two intersection points with the projection of the bending line onto the cooker plate. <IMAGE>

Description

(Zusatz zu Patentanmeldung P 37 23 007.8)(Addition to patent application P 37 23 007.8)

Die Erfindung bezieht sich auf einen Strahlheizkörper für Kochgeräte mit einer insbesondere als Glaskeramikplatte ausgebildeten Kochplatte und mit mindestens zwei stab­förmigen, zueinander parallel verlaufenden Strahlern, z. B. Halogenlampen, die zwischen der Kochplatte und zugehörigen Reflektoren angeordnet sind, wobei jeder Reflektor, unter Bildung einer im Bereich des Strahlers hochgezogenen Knickkante, zwei aneinanderstoßende Teil­parabolflächen mit hochgezogenen Außenkanten aufweist und wobei die genannten Teile derart zueinander angeordnet sind, daß der oberhalb jedes Strahlers liegende Bereich der Kochplatte überwiegend von direkter und die Außen­bereiche überwiegend von reflektierter Strahlung getroffen werden, nach Patentanmeldung P 37 23 077.8.The invention relates to a radiant heater for cooking appliances with a hotplate, in particular in the form of a glass ceramic plate, and with at least two rod-shaped radiators which run parallel to one another, e.g. B. Halogen lamps, which are arranged between the hotplate and associated reflectors, each reflector, forming a raised edge in the area of the radiator, has two abutting partial parabolic surfaces with raised outer edges, and the parts mentioned are arranged such that the above each radiator lying area of the hotplate is mainly hit by direct radiation and the outer areas are mostly hit by reflected radiation, according to patent application P 37 23 077.8.

In der genannten älteren Anmeldung wird ein Strahlheiz­körper beschrieben, bei dem unter einer Kochplatte ein kreisförmiges Gehäuse vorgesehen ist, in dem zwei Halogen­lampen mit je einem zugeordneten Reflektor befestigt sind. Es hat sich gezeigt, daß die weitgehend parallelen und geraden Knickkanten unterhalb der Strahler, d. h. der Halogenlampen, zusammen mit der runden Randbegrenzung an bestimmten Stellen zu einer unerwünschten Erhöhung der Leistungsdichte führen. Diese Stellen liegen einmal im Zentrum der kreisförmigen Anordnung, d. .h. mitten zwischen den beiden Halogenlampen, und zum anderen in den beiden Außenecken außerhalb der Halogenlampen, wo deren gedachte Verlängerung mit der kreisförmigen Randbegrenzung zusammentrifft. Ferner ist die Strahlungsdichte in allen vier Zonen der Randbegrenzung, die zwischen den vier genannten Stellen mit der unerwünschten Erhöhung der Leistungsdichte liegen, geringer als erwünscht.In the older application mentioned, a radiant heater is described in which a circular housing is provided under a hotplate, in which two halogen lamps, each with an associated reflector, are fastened. It has been shown that the largely parallel and straight bend edges below the spotlights, ie the halogen lamps, together with the round border certain places lead to an undesirable increase in power density. These locations lie once in the center of the circular arrangement, i.e. .H. in the middle between the two halogen lamps, and on the other hand in the two outside corners outside the halogen lamps, where their imaginary extension meets the circular border. Furthermore, the radiation density in all four zones of the boundary, which lie between the four points mentioned with the undesirable increase in the power density, is lower than desired.

Der Erfindung liegt die Aufgabe zugrunde, einen Strahl­heizkörper der eingangs genannten Art derart zu gestalten, daß die Strahlungsdichte möglichst gleichförmig über eine kreisförmige Platte verteilt ist. Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die Halogenlampen in einer allseitig geschlossenen Reflektormulde liegen und daß die den Halogenlampen zugeordneten Knickkanten, in einer zur Herdplatte parallelen Ebene liegend, nach außen hin derart gekrümmt sind, daß die Projektion einer Knick­kante und einer zugehörigen Halogenlampe auf die Herd­platte zwei Schnittstellen im Endbereich der Halogenlampe ergibt. Durch eine solche Ausbildung der Knickkante bzw. Knicklinie wird die Strahlung derart beeinflußt, daß im Zentrum und in den Außenzwickeln der Strahlerenden die Strahlungsdichte erniedrigt und in den Randbereichen, die zwischen den genannten Außenzwickeln liegen, die Strah­lungsdichte erhöht wird. Damit ergibt sich eine annähernd gleichförmige Strahlungsdichte auf der Herdplatte, d. h. die Strahlungsverteilung im Bereich der Lampenmitte und der Lampenenden wird durch die erfindungsgemäße Gestaltung in der gewünschten Weise korrigiert.The invention has for its object to design a radiant heater of the type mentioned in such a way that the radiation density is distributed as uniformly as possible over a circular plate. This object is achieved according to the invention in that the halogen lamps are located in a reflector trough which is closed on all sides and in that the bent edges assigned to the halogen lamps, lying in a plane parallel to the hotplate, are curved outwards in such a way that the projection of a folded edge and an associated halogen lamp on the hotplate there are two interfaces in the end area of the halogen lamp. The radiation is influenced by such a configuration of the fold edge or fold line in such a way that the radiation density is reduced in the center and in the outer gussets of the radiator ends and the radiation density is increased in the edge regions which lie between the mentioned outer gussets. This results in an approximately uniform radiation density on the hotplate, ie the radiation distribution in the area of the lamp center and lamp ends is corrected in the desired manner by the design according to the invention.

Eine vorteilhafte Ausführungsform ist gekennzeichnet durch eine kreisförmige Reflektormulde mit zwei Halogenlampen, wobei die Stelle der kleinsten Entfernung zwischen den beiden kreisbogenförmigen Knickkanten in der Mitte zwischen den beiden Halogenlampen liegt und wobei jede Knickkante an ihren Enden, nach Unterquerung der Halogen­lampe in deren Endbereichen, in die Muldenwandung aus­läuft. Eine derartige kreisförmige Reflektormulde mit den genannten, erfindungsgemäß gestalteten Knickkanten ermöglicht mit wenig Aufwand eine optimale Verteilung der Strahlungsenergie. Eine bevorzugte Ausführungsform der Erfindung besteht darin, daß die fiktiven Schnittstellen zwischen den Knickkanten und den jeweiligen Enden der Halogenlampen im letzten Viertel der Halogenlampen liegen.An advantageous embodiment is characterized by a circular reflector trough with two halogen lamps, the location of the smallest distance between the two circular arc-shaped folding edges being in the middle between the two halogen lamps and with each folding edge at its ends, after passing under the halogen lamp in its end regions, into the Trough wall runs out. Such a circular reflector trough with the aforementioned folding edges designed according to the invention enables an optimal distribution of the radiation energy with little effort. A preferred embodiment of the invention is that the fictitious interfaces between the fold edges and the respective ends of the halogen lamps are in the last quarter of the halogen lamps.

In der Zeichnung ist in Fig. 1 schematisch ein Ausführungsbeispiel gemäß dem Stand der Technik und in Fig. 2 bis 6 ein Ausführungsbeispiel gemäß der Erfindung dargestellt.

  • Fig. 1a zeigt eine Draufsicht einer Herdplatte gemäß dem Stand der Technik,
  • Fig. 1b zeigt einen Querschnit zu Fig. 1a,
  • Fig. 2 zeigt eine Draufsicht einer Herdplatte gemäß der Erfindung,
  • Fig. 3 zeigt einen Schnitt A-A gemäß Fig. 2,
  • Fig. 4 zeigt einen Schnitt B-B gemäß Fig. 2,
  • Fig. 5 zeigt den Strahlungsverlauf und die Strahlungs­verteilung, dargestellt am vergrößerten rechten Teil der Fig. 3, und
  • Fig. 6 zeigt den Strahlungsverlauf und die Strahlungs­verteilung, dargestellt am rechten vergrößerten Teil der Fig. 4.
In the drawing, an exemplary embodiment according to the prior art is shown schematically in FIG. 1 and an exemplary embodiment according to the invention is shown in FIGS. 2 to 6.
  • 1a shows a plan view of a hotplate according to the prior art,
  • 1b shows a cross section to FIG. 1a,
  • 2 shows a top view of a hotplate according to the invention,
  • 3 shows a section AA according to FIG. 2,
  • FIG. 4 shows a section BB according to FIG. 2,
  • FIG. 5 shows the radiation course and the radiation distribution, shown on the enlarged right part of FIG. 3, and
  • FIG. 6 shows the radiation course and the radiation distribution, shown on the right enlarged part of FIG. 4.

Fig. 1a und 1b zeigen einen Strahlheizkörper 10 mit einem Gehäuse 11 und mit zwei Halogenlampen 12, die zwischen zwei Reflektoren 13, 14 und der Herdplatte 15 angeordnet sind. Die Reflektoren 13, 14 sind jeweils aus zwei Teilparabolflächen 13′, 13˝ und 14′, 14˝ gebildet und besitzen zwei Knickkanten 13a, 14a, die parallel zu den Halogenlampen 12 in einem gleichbleibenden Abstand verlaufen. Die Reflektoren 13, 14 laufen im Außenbereich in die kegelförmige Randbegrenzung aus. Die gemessene Leistungsverteilung hat gezeigt, daß die weitgehend parallelen und geraden Knickkanten 13a, 14a unterhalb der Strahler 12 zusammen mit der runden Randbegrenzung des Gehäuses 11 an den Stellen 16a und 16b zu einer unerwünschten Erhöhung der Leistungsdichte führen (+). Die Stelle 16a liegt im Zentrum der Herdplatte, und die Stellen 16b liegen in den Außenzwickeln der Enden der Strahler 12. In den zwischen diesen Stellen liegenden Randzonen 16c und 16d dagegen ist die Strahlungsdichte geringer als erwünscht (-). Fig. 1b zeigt schematisch einen Querschnitt durch die Mitte des bekannten Strahlers gemäß Fig. 1a.1a and 1b show a radiant heater 10 with a housing 11 and with two halogen lamps 12 which are arranged between two reflectors 13, 14 and the hotplate 15. The reflectors 13, 14 are each formed from two partial parabolic surfaces 13 ', 13˝ and 14', 14˝ and have two folding edges 13a, 14a, which run parallel to the halogen lamps 12 at a constant distance. The reflectors 13, 14 run out into the conical edge boundary in the outer region. The measured power distribution has shown that the largely parallel and straight fold edges 13a, 14a below the radiators 12 together with the round edge limitation of the housing 11 at the points 16a and 16b lead to an undesirable increase in the power density (+). The point 16a lies in the center of the hotplate, and the points 16b lie in the outer gussets of the ends of the radiators 12. In contrast, in the edge zones 16c and 16d lying between these points, the radiation density is lower than desired (-). 1b schematically shows a cross section through the center of the known radiator according to FIG. 1a.

Fig. 2 zeigt den Strahlheizkörper 10 mit seinem Gehäuse 11 und den beiden parallel zueinander verlaufenden, stab­ förmigen Halogenlampen 12. Mit 17 und 18 sind die gemäß der Erfindung speziell gestalteten Reflektoren bezeichnet, deren Knickkanten 17a, 18a kreisbogenförmig gestaltet sind und, von oben gesehen, jeweils zwei fiktive Schnittstellen 19, 20 mit den Halogenlampen 12 bilden. Die gekrümmten Knickkanten 17a, 18a besitzen in der Mitte zwischen den beiden Halogenlampen 12 den kleinsten gegenseitigen Abstand 21. Die Projektion der Halogenlampen 12 und der Knickkanten 17a, 18a auf die Herdplatte 15 ergibt, rechtwinklig zu den Halogenlampen 12 gemessen, diesseits der Halogenlampen einen größten gegenseitigen Abstand 22, 23 und jenseits der Halogenlampen 12 einen größten gegenseitigen Abstand 24, 25.Fig. 2 shows the radiant heater 10 with its housing 11 and the two parallel rod shaped halogen lamps 12. With 17 and 18, the reflectors specially designed according to the invention are designated, the buckling edges 17a, 18a of which are designed in the shape of a circular arc and, viewed from above, each form two fictitious interfaces 19, 20 with the halogen lamps 12. The curved folding edges 17a, 18a have the smallest mutual distance 21 in the middle between the two halogen lamps 12. The projection of the halogen lamps 12 and the folding edges 17a, 18a onto the hob 15 results, measured at right angles to the halogen lamps 12, on this side of the halogen lamps being the largest mutual distance 22, 23 and beyond the halogen lamps 12 a greatest mutual distance 24, 25.

Aus den in Fig. 3 und 4 dargestellten Schnittbildern ist der schematische Verlauf der Reflektoren 17 und 18 mit ihren Knickkanten 17a, 18a erkennbar. Jeder Reflektor 17, 18 weist zwei Teilparabolflächen 17′, 17˝ und 18′, 18˝ auf, die an den Knickkanten 17a, 18a ineinander über­gehen. Der zu diesen Figuren gehörende Strahlungsverlauf und die Strahlungsverteilung sind aus Fig. 5 und 6 erkenn­bar. Mit 26 ist der Strahlungsverlauf und mit 27 die jeweils erzielbare Strahlungsverteilung im Bereich der Lampenmitte gemäß Schnitt A-A und im Bereich der Lampenenden gemäß Schnitt B-B dargestellt. Durch einen derartigen asymmetrischen Verlauf der Reflektoren 17, 18 ergibt sich eine Strahlungsverteilung, die im Hinblick auf die eingangs erwähnten Unregelmäßigkeiten in den Randzonen und in der Mitte korrigiert worden ist. Gemäß Fig. 5 ist die Strahlungsdichte 27a im Bereich der Randzonen 16c erhöht. Gemäß Fig. 6 ist die Strahlungsdichte 27b in der Plattenmitte am Lampenende im Bereich der Randzone 16d erhöht.The schematic course of the reflectors 17 and 18 with their kinked edges 17a, 18a can be seen from the sectional images shown in FIGS. 3 and 4. Each reflector 17, 18 has two partial parabolic surfaces 17 ', 17˝ and 18', 18˝, which merge into one another at the folding edges 17a, 18a. The radiation course belonging to these figures and the radiation distribution can be seen from FIGS. 5 and 6. With 26 the radiation course and with 27 the respectively achievable radiation distribution in the area of the lamp center according to section A-A and in the area of the lamp ends according to section B-B is shown. Such an asymmetrical course of the reflectors 17, 18 results in a radiation distribution which has been corrected with regard to the irregularities mentioned in the marginal zones and in the middle. 5, the radiation density 27a is increased in the region of the edge zones 16c. 6, the radiation density 27b is increased in the middle of the plate at the end of the lamp in the region of the edge zone 16d.

Claims (2)

1. Strahlheizkörper für Kochgeräte mit einer insbesondere als Glaskeramikplatte ausgebildeten Kochplatte und mit mindestens zwei stabförmigen, zueinander parallel verlaufenden Strahlern, z. B. Halogenlampen, die zwischen der Kochplatte und zugehörigen Reflektoren angeordnet sind, wobei jeder Reflektor, unter Bildung einer im Bereich des Strahlers hochgezogenen Knickkante, zwei aneinanderstoßende Teilparabolflächen mit hochgezogenen Außenkanten aufweist und wobei die genannten Teile derart zueinander angeordnet sind, daß der oberhalb jedes Strahlers liegende Bereich der Kochplatte überwiegend von direkter und die Außenbereiche überwiegend von reflektier­ter Strahlung getroffen werden, nach Patentanmeldung P 37 23 077.8, dadurch gekennzeichnet, daß die Strahler (12) in einer allseitig geschlossenen Reflektormulde (17, 18) liegen und daß die den Strahlern(12) zugeordneten Knickkanten (17a, 18a) in einer zur Herdplatte (15) parallelen Ebene liegen und derart nach außen hin gekrümmt sind, daß die Projektion einer Knickkante (17a, 18a) und der zugehörigen Halogenlampe (12) auf die Herdplatte (15) zwei Schnittstellen (19, 20) im Endbereich des Strahlers (12) ergibt.1. radiant heater for cooking appliances with a hotplate designed in particular as a glass ceramic plate and with at least two rod-shaped, mutually parallel radiators, for. B. Halogen lamps, which are arranged between the hotplate and associated reflectors, each reflector, forming a raised edge in the area of the radiator, has two abutting partial parabolic surfaces with raised outer edges, and the parts mentioned are arranged such that the above each radiator lying area of the hotplate is mainly hit by direct radiation and the outer areas mainly by reflected radiation, according to patent application P 37 23 077.8, characterized in that the emitters (12) lie in a reflector trough (17, 18) which is closed on all sides and that the emitters ( 12) associated kinked edges (17a, 18a) lie in a plane parallel to the hotplate (15) and are curved outwards in such a way that the projection of a kinked edge (17a, 18a) and the associated halogen lamp (12) onto the hotplate (15) results in two interfaces (19, 20) in the end region of the radiator (12) . 2. Strahlheizkörper nach Anspruch 1, gekennzeichnet durch eine kreisförmige Reflektormulde (17, 18) mit zwei Strah­lern (12), wobei die Stelle der kleinsten Entfernung (21) zwischen den kreisbogenförmigen Knickkanten (17a, 18a) in der Mitte zwischen den beiden Strahlern (12) liegt und wobei jede Knickkante (17a, 18a), nach Unterquerung des Strahlers (12) in dessen Endbereichen, in die Wandung der Reflektormulde (17, 18) ausläuft.2. radiant heater according to claim 1, characterized by a circular reflector trough (17, 18) with two radiators (12), the location of the smallest distance (21) between the circular arc-shaped fold edges (17a, 18a) in the middle between the two radiators (12) and each fold edge (17a, 18a), after passing under the radiator (12) in its end regions, into the wall of the reflector trough (17, 18 ) expires.
EP89203123A 1988-12-14 1989-12-08 Radiant heating element for cooking devices Expired - Lifetime EP0373706B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89203123T ATE93674T1 (en) 1988-12-14 1989-12-08 RADIANT HEATING ELEMENT FOR COOKING APPLIANCES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3842033 1988-12-14
DE19883842033 DE3842033A1 (en) 1987-07-11 1988-12-14 Radiating heating element for cooking appliances

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EP0373706A2 true EP0373706A2 (en) 1990-06-20
EP0373706A3 EP0373706A3 (en) 1992-01-02
EP0373706B1 EP0373706B1 (en) 1993-08-25

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AT (1) ATE93674T1 (en)
DE (1) DE58905389D1 (en)
ES (1) ES2042984T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8263909B2 (en) 2007-02-07 2012-09-11 Lg Electronics Inc. Cooking apparatus and heater supporter for the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008096942A2 (en) 2007-02-07 2008-08-14 Lg Electronics Inc. Cooking apparatus

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Publication number Priority date Publication date Assignee Title
DE1059854B (en) * 1956-07-28 1959-06-25 Siemens Ag Wide-beam light, in particular street light
FR1520463A (en) * 1967-01-12 1968-04-12 Floodlight for radiant lighting or heating apparatus
DE2755253A1 (en) * 1976-12-21 1978-06-22 Poulsen & Co As L Light source mirror reflector - used for street or security outside lighting has reflecting surface partially enclosing light source
GB2161348A (en) * 1984-06-09 1986-01-08 Micropore International Ltd Radiation heater reflector
DE3710241A1 (en) * 1987-03-27 1988-10-06 Siemens Ag Exterior luminaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1059854B (en) * 1956-07-28 1959-06-25 Siemens Ag Wide-beam light, in particular street light
FR1520463A (en) * 1967-01-12 1968-04-12 Floodlight for radiant lighting or heating apparatus
DE2755253A1 (en) * 1976-12-21 1978-06-22 Poulsen & Co As L Light source mirror reflector - used for street or security outside lighting has reflecting surface partially enclosing light source
GB2161348A (en) * 1984-06-09 1986-01-08 Micropore International Ltd Radiation heater reflector
DE3710241A1 (en) * 1987-03-27 1988-10-06 Siemens Ag Exterior luminaire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8263909B2 (en) 2007-02-07 2012-09-11 Lg Electronics Inc. Cooking apparatus and heater supporter for the same

Also Published As

Publication number Publication date
EP0373706B1 (en) 1993-08-25
ATE93674T1 (en) 1993-09-15
ES2042984T3 (en) 1993-12-16
EP0373706A3 (en) 1992-01-02
DE58905389D1 (en) 1993-09-30

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