EP0454969B1 - Lighting device for an oven - Google Patents

Lighting device for an oven Download PDF

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Publication number
EP0454969B1
EP0454969B1 EP91103303A EP91103303A EP0454969B1 EP 0454969 B1 EP0454969 B1 EP 0454969B1 EP 91103303 A EP91103303 A EP 91103303A EP 91103303 A EP91103303 A EP 91103303A EP 0454969 B1 EP0454969 B1 EP 0454969B1
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EP
European Patent Office
Prior art keywords
lamp
sleeve
lamp housing
equipment according
illuminating equipment
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
EP91103303A
Other languages
German (de)
French (fr)
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EP0454969A2 (en
EP0454969A3 (en
Inventor
Johann Klement
Josef Gerl
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
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Individual
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Publication of EP0454969A2 publication Critical patent/EP0454969A2/en
Publication of EP0454969A3 publication Critical patent/EP0454969A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/65—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air the gas flowing in a closed circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/008—Illumination for oven cavities
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6444—Aspects relating to lighting devices in the microwave cavity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/30—Lighting for domestic or personal use
    • F21W2131/307—Lighting for domestic or personal use for ovens

Definitions

  • the invention is based on a lighting device in a stove according to the preamble of claim 1.
  • a lamp holder with lamps is arranged vertically behind an opening in the appliance wall, the lamp axis running parallel to the appliance wall.
  • the aforementioned opening is closed by a transparent cover made of glass or plastic.
  • a lamp holder with a lamp is arranged behind an opening in the cooking space wall, the axis of which is perpendicular to the cooking space wall.
  • the opening is in turn closed by a glass cover.
  • the lamp and lamp holder are largely surrounded by a metallic sleeve, this metallic sleeve having a perforation for ventilation of the lamp area and for the exit of light rays through the perforation in the direction of a serving as a reflector part of the wall of the lamp housing.
  • the lamp is also surrounded by a perforated metallic sleeve in other known lighting devices in a microwave oven (DE-A-37 32 690; EP-A-0 310 741), the lamp or sleeve axis running parallel to the cooking chamber wall.
  • the invention has for its object to obtain effective protection of the lamp from harmful influences emanating from the oven cavity with structurally simple and spatially inexpensive means.
  • the sleeve Due to the sleeve made of transparent material and its arrangement in relation to the opening in the cooking space wall, an effective thermal barrier is obtained for the heat radiation emanating from the cooking space, at which the heat radiation is partly reflected or absorbed and is diverted to the metallic lamp housing, which The lamp housing itself is located in a relatively cool area outside the oven.
  • the sleeve can be double-sided open tube-like element or as an element that is only open on one side, it being possible in the latter case, during normal operation of the cooker, to even dispense with a cover closing the opening in the cooking space wall. In any case, it is advantageous if the sleeve at least largely covers the lamp and lamp holder.
  • a particular advantage of the lighting device according to the invention is that it can be used universally for different operating modes. It can be used for maximum temperature operation, e.g. Self-cleaning operation by pyrolysis as well as for microwave operation, provided that the sleeve is provided with a lattice-like, metallic and microwave-tight shielding, which can be done in a simple manner by means of a metallic shielding grid inserted into the sleeve or by means of metallic printing. In any case, the lamp and lamp holder are effectively protected against harmful influences from the cooking space. Last but not least, the special geometric arrangement of the lamp holder and lamp results in a very flat design.
  • Fig. 1 denotes a vertical cooking chamber wall of an oven, not shown, into which, for example, a circular opening 2 is incorporated.
  • a metallic lamp housing 4 Attached to an outwardly drawn ring flange 3 of the cooking space wall 1, for example by screws or the like, is a metallic lamp housing 4 which tightly encloses the opening in the cooking space wall and forms a housing space 5.
  • This lamp housing 4 has resilient holding elements 6 for holding onto the opening 2, made of glass or glass-like material, lens-like cover 7, the ring flange 8 of which snaps onto the holding elements 6.
  • a lamp socket 10 Attached to the lower base part 9 of the lamp housing is a lamp socket 10 of conventional design, into which a lamp 11 is inserted or screwed, the lamp axis a running parallel to the plane of the cooking space wall 1 at a distance.
  • the lamp holder 10 and lamp 11 are at least largely surrounded by a tubular sleeve 12 made of glass or glass-like material, for example plastic, which is open at both ends in the first variant and which largely allows light rays to pass through unimpeded.
  • This sleeve is shown in detail in Fig. 2.
  • a lattice-like, metallic shield 13 is incorporated in the glass material in the form of lattice-like arranged metallic wires, the ends of which extend over the lower sleeve boundary 14 protrude.
  • the entire sleeve 12 is attached to the metallic lamp holder 10, specifically in that a plurality of spring washers 15 are pressed onto these wire ends with elastic deformation, which spring washers are in contact with the wire ends and clamp or claw the bottom part of the lamp housing 4.
  • a shield 13 ' can also be produced by evaporating a suitable metal layer in a grid-like structure onto the outer surface of the sleeve 12'.
  • the passage of light through the sleeve 12, 12 ' is no longer noticeably impeded.
  • the luminous efficiency on the one hand and the thermal insulating ability of the sleeve 12 can be further improved in that the shield has a surface that reflects heat rays well, for example has a silvery surface that strongly reflects heat and light rays.
  • Fig. 1 shows that the lamp housing 4 is provided in the lower region and in the upper region with ventilation slots 16, also on the bottom part 9.
  • the sleeve 12 or 12 'on the bottom part has ventilation slots 17, as can be seen from the ventilation arrows through these ventilation slots 16, 17 relatively cool air flows into the housing space 5 of the lamp housing 4 and flows around the outside of the sleeve and through the inside and again at the top emerge. In this way, the lamp holder 10 and lamp 11 are flowed around in a very intensive manner, so that the operating heat is dissipated during lamp operation.
  • Fig. 1 it is indicated by dash-dotted lines that the sleeve 12 can also be closed at the top by an extension 18, with the exception of a ventilation opening 19 through which the aforementioned cooling air can flow upwards. In this way, an outer cover 7 can be dispensed with during normal operation of the cooker.
  • the inner surface of the lamp housing 4 can be provided with a surface that reflects light rays well and serves as a reflector.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electric Ovens (AREA)
  • Electric Stoves And Ranges (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Resistance Heating (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Lighting device for an oven, which has, arranged behind an opening in the cooking chamber wall of the oven, a lamp holder for a lamp which is surrounded by a transparent sleeve. According to the invention, the lamp cap is arranged such that lamps and the axis of the sleeve extend parallel to the cooking chamber wall, the sleeve consisting of glass material and being closely connected to the lamp housing. <IMAGE>

Description

Die Erfindung geht aus von einer Beleuchtungseinrichtung in einem Herd gemäß dem Oberbegriff des Patentanspruches 1.The invention is based on a lighting device in a stove according to the preamble of claim 1.

Bei einer bekannten Beleuchtungseinrichtung für Backöfen (DE-OS 32 19 326) ist hinter einer Öffnung in der Gerätewand senkrecht stehend eine Lampenfassung mit Lampen angeordnet, wobei die Lampenachse parallel zur Gerätewand verläuft. Die vorgenannte Öffnung ist verschlossen durch eine transparente Abdeckung aus Glas oder Kunststoff. Obwohl sich durch die Abdeckung eine spürbare Wärmedämmung gegenüber dem Backofenraum ergibt, ist zu befürchten, daß bei Hochtemperaturbetrieb des Backofens, insbesondere bei Selbstreinigungsbetrieb durch Pyrolyse mit Betriebstemperaturen um 500° C, insbesondere infolge Wärmestrahlung durch die Glasabdeckung hindurch Lampe und Lampenfassung durch Überhitzung Schaden erleiden, verstärkt noch durch die Eigenerwärmung der Lampe selbst. Für Mikrowellenbetrieb ist die Beleuchtungseinrichtung nicht vorgesehen und auch nicht geeignet. Bei einer anderen bekannten Beleuchtungseinrichtung in einem Mikrowellenherd (DE-PS 36 06 421) ist wiederum hinter einer Öffnung in der Garraumwand eine Lampenfassung mit Lampe angeordnet, deren Achse senkrecht steht zur Garraumwand. Die Öffnung ist wiederum verschlossen durch eine gläserne Abdeckung. Um hierbei die Lampe selbst und die Lampenfassung vor der schädlichen Einwirkung der Mikrowellenenergie zu schützen, ist Lampe und Lampenfassung weitgehend von einer metallischen Hülse umgeben, wobei diese metallische Hülse eine Perforation aufweist zur Belüftung des Lampenbereiches und zum Austritt von Lichtstrahlen durch die Perforation hindurch in Richtung eines als Reflektor dienenden Wandungsteils des Lampengehäuses. Auch bei dieser Bauweise würde bei Hoch- oder Höchsttemperaturbetrieb die Lampe einer extremen Belastung durch Wärmestrahlung ausgesetzt sein. Ebenfalls von einer perforierten metallischen Hülse umgeben ist die Lampe bei weiteren, bekannten Beleuchtungseinrichtungen in einem Mikrowellenherd (DE-A-37 32 690; EP-A-0 310 741) wobei Lampen- oder Hülsenachse parallel zur Garraumwand verlaufen.In a known lighting device for ovens (DE-OS 32 19 326), a lamp holder with lamps is arranged vertically behind an opening in the appliance wall, the lamp axis running parallel to the appliance wall. The aforementioned opening is closed by a transparent cover made of glass or plastic. Although there is noticeable thermal insulation from the oven space due to the cover, there is reason to fear that the lamp and lamp holder may be damaged by overheating when the oven is operated at high temperature, particularly when it is self-cleaning through pyrolysis with operating temperatures of around 500 ° C., in particular as a result of heat radiation through the glass cover. intensified by the self-heating of the lamp itself. The lighting device is not intended and also not suitable for microwave operation. In another known lighting device in a microwave oven (DE-PS 36 06 421), in turn, a lamp holder with a lamp is arranged behind an opening in the cooking space wall, the axis of which is perpendicular to the cooking space wall. The opening is in turn closed by a glass cover. Around To protect the lamp itself and the lamp holder from the harmful effects of microwave energy, the lamp and lamp holder are largely surrounded by a metallic sleeve, this metallic sleeve having a perforation for ventilation of the lamp area and for the exit of light rays through the perforation in the direction of a serving as a reflector part of the wall of the lamp housing. With this construction too, the lamp would be exposed to extreme heat radiation during high or maximum temperature operation. The lamp is also surrounded by a perforated metallic sleeve in other known lighting devices in a microwave oven (DE-A-37 32 690; EP-A-0 310 741), the lamp or sleeve axis running parallel to the cooking chamber wall.

Der Erfindung liegt die Aufgabe zugrunde, mit konstruktiv einfachen und räumlich unaufwendigen Mitteln einen wirksamen Schutz der Lampe vor vom Garraum des Herdes ausgehenden schädlichen Einflüssen zu erhalten.The invention has for its object to obtain effective protection of the lamp from harmful influences emanating from the oven cavity with structurally simple and spatially inexpensive means.

Diese Aufgabe wird gemäß der Erfindung gelöst durch die im Kennzeichnungsteil des Patentanspruches 1 aufgeführten Maßnahmen. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Patentansprüchen.This object is achieved according to the invention by the measures listed in the characterizing part of claim 1. Advantageous further developments of the invention result from the following patent claims.

Durch die aus transparentem Material bestehende Hülse sowie durch deren Anordnung in bezug auf die Öffnung in der Garraumwand wird für die vom Garraum ausgehende Wärmestrahlung eine wirksame thermische Barriere erhalten, an welcher die Wärmestrahlung zum Teil reflektiert oder aber absorbiert und zum metallischen Lampengehäuse abgeleitet wird, welches Lampengehäuse seinerseits sich in einem relativ kühlen Bereich außerhalb des Backofens befindet. Die Hülse kann als beidseitig offenes rohrartiges Element oder aber als nur einseitig offenes Elemnt ausgebildet sein, wobei im letztgenannten Fall bei Normalbetrieb des Herdes evtl. sogar auf eine die Öffnung in der Garraumwand verschließende Abdeckung verzichtet werden kann. In jedem Falle ist es vorteilhaft, wenn die Hülse Lampe und Lampenfassung zumindest weitgehend überdeckt. Durch die Hülse und durch die Anordnung von Lüftungsschlitzen im Lampengehäuse und in der Hülse selbst wird innerhalb der Hülse eine Art Kaminwirkung für Kühlluft erzielt, welche Kühlluft Lampenfassung und Lampe unmittelbar umströmt und die Betriebswärme abführt. Diese Wirkung tritt insbesondere ein, wenn Hülse und Lampe senkrecht stehen, wobei infolge natürlicher Konvektion an der Garraumwand erwärmte Luft von unten nach oben strömt und hierbei auch das Lampengehäuse durchströmt.Due to the sleeve made of transparent material and its arrangement in relation to the opening in the cooking space wall, an effective thermal barrier is obtained for the heat radiation emanating from the cooking space, at which the heat radiation is partly reflected or absorbed and is diverted to the metallic lamp housing, which The lamp housing itself is located in a relatively cool area outside the oven. The sleeve can be double-sided open tube-like element or as an element that is only open on one side, it being possible in the latter case, during normal operation of the cooker, to even dispense with a cover closing the opening in the cooking space wall. In any case, it is advantageous if the sleeve at least largely covers the lamp and lamp holder. Due to the sleeve and the arrangement of ventilation slots in the lamp housing and in the sleeve itself, a kind of chimney effect for cooling air is achieved within the sleeve, the cooling air flowing directly around the lamp holder and lamp and dissipating the operating heat. This effect occurs in particular when the sleeve and the lamp are vertical, where, as a result of natural convection, heated air flows from the bottom to the top and thereby also flows through the lamp housing.

Ein besonderer Vorteil der erfindungsgemäßen Beleuchtungseinrichtung besteht darin, daß dieselbe universell für unterschiedliche Betriebsarten verwendbar ist. Sie ist verwendbar für Höchsttemperaturbetrieb, z.B. Selbstreinigungsbetrieb durch Pyrolyse ebenso wie für Mikrowellenbetrieb, sofern die Hülse mit einer gitterartigen, metallischen und mikrowellendichten Abschirmung versehen ist, was in einfacher Weise durch ein in die Hülse eingelegtes metallisches Abschirmgitter oder durch eine metallische Bedruckung geschehen kann. In jedem Falle ist hierbei Lampe und Lampenfassung vor schädlichen, vom Garraum ausgehenden Einflüssen wirksam geschützt. Nicht zuletzt ergibt sich die besondere geometrische Anordnung von Lampenfassung und Lampe eine sehr flache Bauweise.A particular advantage of the lighting device according to the invention is that it can be used universally for different operating modes. It can be used for maximum temperature operation, e.g. Self-cleaning operation by pyrolysis as well as for microwave operation, provided that the sleeve is provided with a lattice-like, metallic and microwave-tight shielding, which can be done in a simple manner by means of a metallic shielding grid inserted into the sleeve or by means of metallic printing. In any case, the lamp and lamp holder are effectively protected against harmful influences from the cooking space. Last but not least, the special geometric arrangement of the lamp holder and lamp results in a very flat design.

Die Erfindung ist anhand von in der Zeichnung dargestellten Ausführungsbeispielen nachstehend erläutert. Es zeigt:

Fig. 1
eine Schnittansicht der mit einer Garraumwand eines nicht weiter dargestellten Herdes verbundenen Beleuchtungseinrichtung gemäß der Erfindung,
Fig. 2 und Fig. 3
Ausführungsvarianten der Hülse der Beleuchtungseinrichtung in Seitenansicht.
The invention is explained below with reference to exemplary embodiments shown in the drawing. It shows:
Fig. 1
2 shows a sectional view of the lighting device according to the invention connected to a cooking space wall of an oven, not shown,
2 and 3
Variants of the sleeve of the lighting device in side view.

In Fig. 1 ist mit 1 eine senkrechte Garraumwand eines nicht weiter dargestellten Herdes bezeichnet, in die eine z.B. kreisrunde Öffnung 2 eingearbeitet ist. An einem nach außen gezogenen Ringflansch 3 der Garraumwand 1, z.B. durch Schrauben oder dergleichen befestigt, ist ein metallisches Lampengehäuse 4, das die Öffnung in der Garraumwand dicht und unter Bildung eines Gehäuseraumes 5 umschließt. Dieses Lampengehäuse 4 besitzt federnde Halteelemente 6 für die Halterung auf die Öffnung 2 aufgesetzten, aus Glas oder glasartigem Material bestehenden, linsenartigen Abdeckung 7, deren Ringflansch 8 mit den Halteelementen 6 verschnappt. Am unteren Bodenteil 9 des Lampengehäuses befestigt ist eine Lampenfassung 10 üblicher Bauart, in welche eine Lampe 11 eingesteckt oder eingeschraubt ist, wobei die Lampenachse a mit Abstand parallel zur Ebene der Garraumwand 1 verläuft. Lampenfassung 10 und Lampe 11 sind zumindest weitgehend umgeben von einer in der ersten Variante beidenends offenen, rohrartigen Hülse 12 aus Glas oder glasartigem Material, z.B. Kunststoff, das Lichtstrahlen weitgehend ungehindert durchläßt. Diese Hülse ist in Fig. 2 als Einzelheit dargestellt. Man erkennt, daß in das Glasmaterial eine gitterartige, metallische Abschirmung 13 eingearbeitet ist in Form von gitterartig angeordneten metallischen Drähten, deren Enden über die untere Hülsenbegrenzung 14 hinausragen. An diesen freiragenden Enden der Abschirmung erfolgt eim Ausführungsbeispiel gemäß Fig. 1 die Befestigung der gesamten Hülse 12 an der metallischen Lampenfassung 10, und zwar dadurch, daß auf diese Drahtenden eine doer mehrere Federscheiben 15 unter elastischer Verformung aufgedrückt sind, welche Federscheiben sich mit den Drahtenden und dem Bodenteil des Lampengehäuses 4 verspannen bzw. verkrallen. Auf diese Weise wird zwischen der metallischen Abschirmung und dem metallischen Lampengehäuse 4, das wiederum in unmittelbarem metallischen Kontakt steht, mit der Garraumwand eine durchgehende, metallische und elektrisch leitende Verbindung geschaffen, die ein Eintritt von Mikrowellen in den Innenbereich der Hülse 12 verhindert. Wie in Fgi. 3 dargestellt, kann anstelle einer drahtartigen Abschirmung eine Abschirmung 13' auch durch Aufdampfen einer geeigneten Metallschicht in gitterförmiger Struktur auf die Außenfläche der Hülse 12' hergestellt werden. Bei beiden Varianten ist ein Lichtdurchtritt durch die Hülse 12, 12' nicht mehr merklich behindert. Die Lichtausbeute einerseits und die thermische Isolierfähigkeit der Hülse 12 kann dadurch noch verbessert werden, daß die Abschgirmung eine Wärmestrahlen gut reflektierende Oberfläche aufweist, z.B. eine Wärme- und Lichtstrahlen stark reflektierende silbrige Oberfläche besitzt.In Fig. 1, 1 denotes a vertical cooking chamber wall of an oven, not shown, into which, for example, a circular opening 2 is incorporated. Attached to an outwardly drawn ring flange 3 of the cooking space wall 1, for example by screws or the like, is a metallic lamp housing 4 which tightly encloses the opening in the cooking space wall and forms a housing space 5. This lamp housing 4 has resilient holding elements 6 for holding onto the opening 2, made of glass or glass-like material, lens-like cover 7, the ring flange 8 of which snaps onto the holding elements 6. Attached to the lower base part 9 of the lamp housing is a lamp socket 10 of conventional design, into which a lamp 11 is inserted or screwed, the lamp axis a running parallel to the plane of the cooking space wall 1 at a distance. The lamp holder 10 and lamp 11 are at least largely surrounded by a tubular sleeve 12 made of glass or glass-like material, for example plastic, which is open at both ends in the first variant and which largely allows light rays to pass through unimpeded. This sleeve is shown in detail in Fig. 2. It can be seen that a lattice-like, metallic shield 13 is incorporated in the glass material in the form of lattice-like arranged metallic wires, the ends of which extend over the lower sleeve boundary 14 protrude. On the cantilevered ends of the shielding, in the exemplary embodiment according to FIG. 1, the entire sleeve 12 is attached to the metallic lamp holder 10, specifically in that a plurality of spring washers 15 are pressed onto these wire ends with elastic deformation, which spring washers are in contact with the wire ends and clamp or claw the bottom part of the lamp housing 4. In this way, a continuous, metallic and electrically conductive connection is created between the metallic shield and the metallic lamp housing 4, which in turn is in direct metallic contact, with the cooking chamber wall, which prevents microwaves from entering the inner region of the sleeve 12. As in Fgi. 3, instead of a wire-like shield, a shield 13 'can also be produced by evaporating a suitable metal layer in a grid-like structure onto the outer surface of the sleeve 12'. In both variants, the passage of light through the sleeve 12, 12 'is no longer noticeably impeded. The luminous efficiency on the one hand and the thermal insulating ability of the sleeve 12 can be further improved in that the shield has a surface that reflects heat rays well, for example has a silvery surface that strongly reflects heat and light rays.

Fig. 1 zeigt, daß das Lampengehäuse 4 im unteren Bereich und im oberen Bereich mit Lüftungsschlitzen 16 versehen ist, auch am Bodenteil 9. Ebenso besitzt die Hülse 12 bzw. 12' am Bodenteil als Ausnehmungen ausgeführte Lüftungsschlitze 17. Wie durch Lüftungspfeile verdeutlicht, kann durch diese Lüftungsschlitze 16, 17 relativ kühle Luft in den Gehäuseraum 5 des Lampengehäuses 4 einströmen und die Hülse außen umströmen und innen durchströmen und oben wieder austreten. Auf diese Weise wird Lampenfassung 10 und Lampe 11 auf sehr intensive Art umströmt, womit bei Lampenbetrieb die Betriebswärme abgeführt wird.Fig. 1 shows that the lamp housing 4 is provided in the lower region and in the upper region with ventilation slots 16, also on the bottom part 9. Likewise, the sleeve 12 or 12 'on the bottom part has ventilation slots 17, as can be seen from the ventilation arrows through these ventilation slots 16, 17 relatively cool air flows into the housing space 5 of the lamp housing 4 and flows around the outside of the sleeve and through the inside and again at the top emerge. In this way, the lamp holder 10 and lamp 11 are flowed around in a very intensive manner, so that the operating heat is dissipated during lamp operation.

In Fig. 1 ist durch strichpunktierte Linienzüge angedeutet, daß die Hülse 12 auch nach oben hin durch eine Erweiterung 18 verschlossen sein kann, mit Ausnahme einer Lüftungsöffnung 19, durch die hindurch die vorgenannte Kühlluft nach oben hin abströmen kann. Auf diese Weise kann bei Normalbetrieb des Herdes auf eine äußere Abdeckung 7 verzichtet werden.In Fig. 1 it is indicated by dash-dotted lines that the sleeve 12 can also be closed at the top by an extension 18, with the exception of a ventilation opening 19 through which the aforementioned cooling air can flow upwards. In this way, an outer cover 7 can be dispensed with during normal operation of the cooker.

Um insgesamt die Lichtausbeute der Beleuchtungseinrichtung zu erhöhen, kann die Innenfläche des Lampengehäuses 4 mit einer Lichtstrahlen gut reflektierenden Oberfläche versehen sein, die als Reflektor dient.In order to increase the overall light yield of the lighting device, the inner surface of the lamp housing 4 can be provided with a surface that reflects light rays well and serves as a reflector.

Claims (9)

  1. Illuminating equipment in a cooker with an equipment for the heating of stock to be cooked, with a lamp holder (10), which is arranged within a lamp housing (4) in the cooking chamber wall (1) and behind an opening (2), for a lamp (11), which is surrounded at least to a large extent by a translucent sleeve (12), which stands in close mechanical connection with the lamp housing (4), wherein the lamp holder (10) is arranged in the lamp housing (4) in such a manner that the axis (a) of the lamp and the sleeve extends at least substantially parallelly to the cooking chamber wall (1), characterised thereby, that the sleeve (12) consists of glass or glass-like transparent material.
  2. Illuminating equipment according to claim 1 in a cooker with an equipment for the high-frequency heating of the stock to be cooked, characterised thereby, that the lamp housing (4) surrounds the opening (2) in the cooking chamber wall (1) in microwave-tight manner and that the sleeve (12, 12') carries a grid-like metallic and microwave-tight screening (13, 13').
  3. Illuminating equipment according to one of the claims 2 and 3, characterised thereby, that the screening (13, 13') stands in mechanical and electrically conductive connection with the lamp housing (4).
  4. Illuminating equipment according to one of the claims 2 and 3, characterised thereby, that the screening (13, 13') displays a surface well reflecting the heat radiation.
  5. Illuminating equipment according to one of the preceding claims, characterised thereby, that the lamp housing (4) preferably has ventilation slots (16) at upper and lower housing parts.
  6. Illuminating equipment according to claim 5, characterised thereby, that the preferably vertical sleeve (12) is open at both ends and has ventilation slots (17) in the region of the lower connection with the lamp housing (4).
  7. Illuminating equipment according to claim 5, characterised thereby, that the preferably vertical sleeve (12) is closed at one end and has ventilation slots (17; 19) in the region of the lower connection with the lamp housing (4) and at the upper closed end.
  8. Illuminating equipment according to one of the preceding claims, characterised thereby, that a transparent cover (7) is detachably inserted into the opening (2) of the cooking chamber wall (1).
  9. Illuminating equipment according to one of the preceding claims, characterised thereby, that the inward surface of the lamp housing (4) is constructed as reflector.
EP91103303A 1990-05-04 1991-03-05 Lighting device for an oven Expired - Lifetime EP0454969B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4014360A DE4014360A1 (en) 1990-05-04 1990-05-04 LIGHTING DEVICE FOR A STOVE
DE4014360 1990-05-04

Publications (3)

Publication Number Publication Date
EP0454969A2 EP0454969A2 (en) 1991-11-06
EP0454969A3 EP0454969A3 (en) 1992-04-01
EP0454969B1 true EP0454969B1 (en) 1995-05-24

Family

ID=6405721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103303A Expired - Lifetime EP0454969B1 (en) 1990-05-04 1991-03-05 Lighting device for an oven

Country Status (7)

Country Link
EP (1) EP0454969B1 (en)
JP (1) JPH04227420A (en)
KR (1) KR910020366A (en)
AT (1) ATE123128T1 (en)
DE (2) DE4014360A1 (en)
DK (1) DK0454969T3 (en)
ES (1) ES2074596T3 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4304523A1 (en) * 1993-02-15 1994-08-18 Bosch Siemens Hausgeraete Luminaire for ovens
DE4304522A1 (en) * 1993-02-15 1994-08-18 Bosch Siemens Hausgeraete Luminaire for microwave oven
DE19748002A1 (en) 1997-10-30 1999-05-06 Bosch Siemens Hausgeraete Cooker with cooled lighting equipment
DE19833774A1 (en) * 1998-07-27 2000-02-03 Bsh Bosch Siemens Hausgeraete Cooking appliance with cooled light
DE10122878B4 (en) * 2001-05-11 2015-03-26 BSH Bosch und Siemens Hausgeräte GmbH Lighting device for ovens
DE20202558U1 (en) * 2002-02-19 2003-07-03 Zumtobel Staff GmbH & Co. KG, 32657 Lemgo Konvektionsreflektor
KR20050056053A (en) * 2003-12-09 2005-06-14 삼성전자주식회사 Lamp assembly and cooking apparatus having the same
DE102005044347A1 (en) * 2005-09-16 2007-03-22 BSH Bosch und Siemens Hausgeräte GmbH Lighting device for ovens and ovens
DE102009002775A1 (en) * 2009-04-30 2010-11-04 BSH Bosch und Siemens Hausgeräte GmbH Lamp for household appliance and household appliance, in particular for preparing food, with a lamp
DE102012211202A1 (en) * 2012-06-28 2014-01-02 BSH Bosch und Siemens Hausgeräte GmbH Closed cooking compartment light
JP6172247B2 (en) * 2015-12-01 2017-08-02 株式会社島津製作所 Gas chromatograph
CN106016201A (en) * 2016-07-29 2016-10-12 深圳和而泰智能控制股份有限公司 LED lamp, oven and microwave oven

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421640A (en) * 1977-07-20 1979-02-19 Matsushita Electric Ind Co Ltd High frequency heater
JPS5623606U (en) * 1979-07-30 1981-03-03
DE3732690A1 (en) * 1987-09-29 1989-04-13 Licentia Gmbh Illuminating device for illuminating the cooking space of a microwave oven
DE8713264U1 (en) * 1987-10-02 1987-12-03 Hurst & Schröder GmbH, 5980 Werdohl Stove light for a microwave oven

Also Published As

Publication number Publication date
ES2074596T3 (en) 1995-09-16
JPH04227420A (en) 1992-08-17
EP0454969A2 (en) 1991-11-06
DK0454969T3 (en) 1995-10-16
KR910020366A (en) 1991-12-20
DE59105555D1 (en) 1995-06-29
EP0454969A3 (en) 1992-04-01
DE4014360A1 (en) 1991-11-07
ATE123128T1 (en) 1995-06-15

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