EP1923621B1 - Illumination device for a domestic appliance with a processing chamber - Google Patents

Illumination device for a domestic appliance with a processing chamber Download PDF

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Publication number
EP1923621B1
EP1923621B1 EP07020484A EP07020484A EP1923621B1 EP 1923621 B1 EP1923621 B1 EP 1923621B1 EP 07020484 A EP07020484 A EP 07020484A EP 07020484 A EP07020484 A EP 07020484A EP 1923621 B1 EP1923621 B1 EP 1923621B1
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EP
European Patent Office
Prior art keywords
processing chamber
illumination device
light
lighting means
light beams
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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.)
Not-in-force
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EP07020484A
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German (de)
French (fr)
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EP1923621A1 (en
Inventor
Friedrich Littau
August Oberröhrmann
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Miele und Cie KG
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Miele und Cie KG
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Publication of EP1923621A1 publication Critical patent/EP1923621A1/en
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    • 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
    • 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 relates to a lighting device for a household appliance having a treatment room, comprising at least one light source, which is arranged outside the treatment room on the household appliance, and wherein the light source cooperates with at least one light well, which is arranged on one of the walls of the treatment room or the treatment room door, and wherein light rays generated by the illuminant for illuminating the treatment space are deflectable in the direction of the treatment space by reflecting means arranged in the light shaft and can be introduced into the treatment space through transparent areas in the wall or the treatment room door, wherein the extent of the reflection means extends at least in one direction transverse to the treatment space from the illuminant in the direction of the reflection means radiated light rays with increasing distance of the respective reflection means of the illuminant increases such that a portion of the light rays unhindered rt reaches the remotely located reflection means.
  • Such a lighting device is from the WO 03/036176 A1 known.
  • a lighting device for a household appliance and here for example for an oven or a refrigerator, according to G 86 02 774.3 known, wherein a arranged on the side wall lamp is provided, which is separated from the treatment room by a glass pane , The illuminant is surrounded by a reflector means, so that the light rays are directed into the treatment room.
  • the same is also disclosed for a baking oven according to G 86 09 316.9, wherein in this embodiment the lighting means are arranged above the treatment space, and in which case the light beams are irradiated into the treatment space via so-called light guide channels.
  • Another lighting device for the treatment room of a household appliance is from the EP 0 922 910 known, wherein in this embodiment so-called light wells are arranged on the side walls of the treatment space, through which the light beams of a arranged in the upper region of the treatment space illuminant can be introduced.
  • the light beams are deflected in the direction of the treatment space via reflection means located one above the other in the light shaft, so that different levels in the treatment room are illuminated.
  • reflecting means are also arranged at different levels in shafts in the region of the door, which allow the emission of the light beams in different planes.
  • the design of the light shaft is designed such that the expansion of the reflection means increases at least in a direction transverse to the radiated light from the light source in the direction of the reflection means with increasing distance of the respective reflection means of the light source such that a portion of the light rays unhindered on the farther remote arranged reflecting means passes.
  • the invention thus raises the problem of further developing a lighting device with a light shaft for a domestic appliance with a treatment space in such a way that a significantly improved luminous efficiency is brought about in the treatment space.
  • individual reflection means are arranged in the light shaft, which are formed differently in terms of their extension in both Hauptausdehnungsplatzen the plane transverse to the emission direction of the light beams, that a mutual shading of the reflector surfaces is prevented. Due to this design results in a radiation effect in the direction of the treatment room on the different levels in the depth of the treatment room.
  • the individual reflectors formed as a reflection means in the light shaft reflector surfaces whose reflective areas are configured differently such that a mutual shading of the reflector surfaces is prevented.
  • the individual preferably strip-shaped reflector surfaces are each preferably arranged at a 45 ° position to the emission direction of the light beams in the light shaft.
  • the individual strip-shaped reflector preferably has areas which are recessed over its length, so that light beams introduced above the treatment space can penetrate unhindered even to deeper reflector surfaces, and a sufficient light output is also provided on the reflector surfaces lying deeper.
  • the light source is surrounded by a parabolic mirror housing.
  • standard illuminants such as fluorescent tubes can be used with a much better efficiency. These extend over the strip-shaped reflector surfaces.
  • the parabolic mirror housing is arranged on the light shaft via a thermal insulating means, in which case the insulating means is preferably a glass pane.
  • a flat glass pane is advantageously arranged at least in one of the side wall of the treatment room or in the treatment room door, which forms the side wall of the flat-shaped light shaft.
  • This design has the effect that the illumination device can act essentially over the entire wall surface, because, as already explained above, the individual reflection means covers both main expansion directions in the plane transverse to the emission direction of the light rays. This makes it possible to provide a lighting device which enables an area radiation, wherein, in particular, the light shaft can also be made very narrow due to the differently configured reflector surfaces.
  • the FIG. 1 shows in the sectional view of a lighting device 1 for a household appliance 2 with a treatment room 3, in which case, for example, the treatment room 3 may be formed as a baking muffle or as a cooling room.
  • the lighting device 1 comprises at least one lighting means 4, which is arranged outside the treatment space 3 on the household appliance 2.
  • the light source 4 cooperates with a light shaft 5, which is arranged on one of the walls of the treatment room 3 or a treatment room door, not shown.
  • light beams 6 generated by the light source 4 are deflected by means arranged in the light shaft 5 reflection means 7.1, 7.2 and 7.3 in the direction of the treatment chamber 3.
  • the light beams 6 enter through a arranged in the wall or the treatment room door transparent glass 8 into the treatment room 3 a.
  • the expansion of the reflection means 7.1 to 7.3 transversely to the emitted from the light source 4 in the direction of the reflection means 7.1 to 7.3 light rays 6 with increasing distance of the respective reflection means 7.1 to 7.3 from the light source 4 such that a portion of the light rays 6 unimpeded reaches the more distant arranged reflecting means 7.2 and 7.3.
  • the individual reflection means 7.1 to 7.3 is formed extended in terms of its extension in both main directions of extension of the plane transverse to the emission direction of the light beams 6.
  • the individual reflectors 7.1 to 7.3 designed as individual reflectors in the light shaft 5 strip-shaped reflector surfaces 9.1, 9.2 and 9.3.
  • the reflectable areas of the strip-shaped areas 9.1 to 9.3 are designed differently such that mutual shading of the reflector areas 9.1 to 9.3 caused by incident light beams 6 is prevented.
  • the areas 9.1 to 9.3 in the FIG. 2 be taken directly from the light rays 6 and these are also deflected accordingly and radiate into the treatment room 3.
  • the lower reflector surface 9.3 still has the sufficient emission efficiency in the width, because the light beams 6 can still act in both main directions of extension transversely to the emission direction of the light beams 6.
  • the individual strip-shaped reflector surfaces 9.1, 9.2 and 9.3 are preferably arranged at a 45 ° position to the emission direction of the light beams 6 in the light shaft 5.
  • the individual strip-shaped reflector surface 9.1, 9.2 or 9.3 has recessed regions along its length, as is the case for example with the reflector surface 9.2.
  • the luminous means 4 is surrounded by a parabolic mirror housing 10, wherein in the parabolic mirror housing 10 a fluorescent tube can be provided as the illuminant 4, as described in particular in US Pat FIG. 2 is clearly visible.
  • the parabolic mirror housing 10 is arranged on the light shaft 5 via a thermal insulation means 12.
  • the insulating agent is a glass pane 12.
  • a flat glass pane 8 a side wall of the flat formed light shaft fifth
  • FIG. 3 shows a further embodiment of the inventive reflection means 7.1 to 7.5, in which case the reflection means 7.1 to 7.5 have reflector surfaces 9.1, 9.2, 9.3, 9.4 and 9.5. It is clear in this variation of the reflector surfaces 9.1 to 9.5, that due to the design of the different reflector surfaces in both Main extension directions transverse to the emission direction of the light beams 6, a sufficient light output even on the lowest reflector surface 9.5 is achieved.
  • the individual strip-shaped reflector surfaces 9.1 to 9.5 are also preferably arranged at a 45 ° position to the emission direction of the light beams 6 in the light shaft 5, wherein the individual strip-shaped reflector surfaces 9.1 to 9.5 have over their length also recessed areas, which in particular ensure that Even on the lower reflector surfaces 9.2 to 9.5 still a sufficient light output for the treatment room 3 can be kept.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Cookers (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Electric Stoves And Ranges (AREA)
  • Planar Illumination Modules (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The device has individual reflectors formed as multiple reflection units (7.1-7.5), where the reflectors exhibit reflector surfaces (9.1-9.5) in a light shaft (5). The reflector surfaces exhibit reflectable regions that are formed differently transverse to a radiation direction of light beams in both main extension directions of a plane. The reflector surfaces are formed in a lamellar manner. The reflector surfaces are arranged under an angle 45 degree to a radiation direction of the light beams in the light shaft.

Description

Die Erfindung betrifft eine Beleuchtungsvorrichtung für ein Haushaltsgerät mit einem Behandlungsraum, umfassend zumindest ein Leuchtmittel, welches außerhalb des Behandlungsraumes an dem Haushaltsgerät angeordnet ist, und wobei das Leuchtmittel mit zumindest einem Lichtschacht zusammenwirkt, der an einer der Wände des Behandlungsraumes oder der Behandlungsraumtür angeordnet ist, und wobei zur Ausleuchtung des Behandlungsraumes von dem Leuchtmittel erzeugte Lichtstrahlen durch im Lichtschacht angeordnete Reflektionsmittel in Richtung des Behandlungsraumes umlenkbar sind und durch transparente Bereiche in der Wand oder der Behandlungsraumtür in den Behandlungsraum einleitbar sind, wobei die Ausdehnung der Reflektionsmittel zumindest in einer Richtung quer zu den von dem Leuchtmittel in Richtung der Reflektionsmittel abgestrahlten Lichtstrahlen mit zunehmender Entfernung des jeweiligen Reflektionsmittels von dem Leuchtmittel derart zunimmt, dass ein Teil der Lichtstrahlen ungehindert auf das weiter entfernt angeordnete Reflektionsmittel gelangt.The invention relates to a lighting device for a household appliance having a treatment room, comprising at least one light source, which is arranged outside the treatment room on the household appliance, and wherein the light source cooperates with at least one light well, which is arranged on one of the walls of the treatment room or the treatment room door, and wherein light rays generated by the illuminant for illuminating the treatment space are deflectable in the direction of the treatment space by reflecting means arranged in the light shaft and can be introduced into the treatment space through transparent areas in the wall or the treatment room door, wherein the extent of the reflection means extends at least in one direction transverse to the treatment space from the illuminant in the direction of the reflection means radiated light rays with increasing distance of the respective reflection means of the illuminant increases such that a portion of the light rays unhindered rt reaches the remotely located reflection means.

Eine derartige Beleuchtungseinrichtung ist aus der WO 03/036176 A1 bekannt. Außerdem ist aus dem Stand der Technik eine Beleuchtungsvorrichtung für ein Haushaltsgerät, und hier beispielsweise für einen Backofen oder einen Kühlschrank, gemäß der G 86 02 774.3 bekannt, wobei ein an der Seitenwand angeordnetes Leuchtmittel vorgesehen ist, welches gegenüber dem Behandlungsraum durch eine Glasscheibe getrennt ist. Das Leuchtmittel wird von einem Reflektormittel umgeben, so dass die Lichtstrahlen in den Behandlungsraum gelenkt werden. Entsprechendes ist auch für einen Backofen gemäß der G 86 09 316.9 offenbart, wobei bei dieser Ausführungsform die Leuchtmittel oberhalb des Behandlungsraums angeordnet sind, und wobei hier die Lichtstrahlen über so genannte Lichtleitkanäle in den Behandlungsraum eingestrahlt werden. Gemäß der EP 0 446 692 ist eine weitere Beleuchtungsvorrichtung für einen Kühlschrank bekannt, die mit einem rohrförmigen Lichtleiter ausgestattet ist. Dabei wird die Lichteinstrahlung in den Kühlraum mittels eines stabförmigen Lichtleitträgers aus Glas oder Kunststoff in den Behandlungsraum eingeleitet, wobei das Leuchtmittel außerhalb des Behandlungsraumes angeordnet ist.Such a lighting device is from the WO 03/036176 A1 known. In addition, from the prior art, a lighting device for a household appliance, and here for example for an oven or a refrigerator, according to G 86 02 774.3 known, wherein a arranged on the side wall lamp is provided, which is separated from the treatment room by a glass pane , The illuminant is surrounded by a reflector means, so that the light rays are directed into the treatment room. The same is also disclosed for a baking oven according to G 86 09 316.9, wherein in this embodiment the lighting means are arranged above the treatment space, and in which case the light beams are irradiated into the treatment space via so-called light guide channels. According to the EP 0 446 692 Another lighting device for a refrigerator is known, which is equipped with a tubular light guide. In this case, the light radiation is introduced into the cooling space by means of a rod-shaped Lichtleitträgers of glass or plastic in the treatment room, wherein the lighting means is arranged outside the treatment room.

Eine weitere Beleuchtungsvorrichtung für den Behandlungsraum eines Haushaltsgerätes ist aus der EP 0 922 910 bekannt, wobei bei dieser Ausführungsform an den seitlichen Wänden des Behandlungsraumes so genannte Lichtschächte angeordnet sind, durch die die Lichtstrahlen eines im oberen Bereich des Behandlungsraumes angeordneten Leuchtmittels einleitbar sind. Die Lichtstrahlen werden über in dem Lichtschacht übereinander liegende Reflektionsmittel in Richtung des Behandlungsraums umgelenkt, so dass unterschiedliche Ebenen im Behandlungsraum ausgeleuchtet werden.Another lighting device for the treatment room of a household appliance is from the EP 0 922 910 known, wherein in this embodiment so-called light wells are arranged on the side walls of the treatment space, through which the light beams of a arranged in the upper region of the treatment space illuminant can be introduced. The light beams are deflected in the direction of the treatment space via reflection means located one above the other in the light shaft, so that different levels in the treatment room are illuminated.

Eine äquivalente Beleuchtungsvorrichtung für ein Gargerät ist ebenfalls gemäß dem Stand der Technik in den Dokumenten DE 103 18 860 , DE 103 18 859 und DE 103 18 861 dokumentiert. Bei dieser Ausführungsform sind ebenfalls auf unterschiedlichen Ebenen Reflektionsmittel in Schächten im Bereich der Tür angeordnet, die das Abstrahlen der Lichtstrahlen in unterschiedlichen Ebenen ermöglichen. Die Auslegung des Lichtschachtes ist derart ausgebildet, dass die Ausdehnung der Reflektionsmittel zumindest in einer Richtung quer zu den von dem Leuchtmittel in Richtung der Reflektionsmittel abgestrahlten Lichtstrahlen mit zunehmender Entfernung des jeweiligen Reflektionsmittels von dem Leuchtmittel derart zunimmt, dass ein Teil der Lichtstrahlen ungehindert auf das weiter entfernt angeordnete Reflektionsmittel gelangt.An equivalent lighting device for a cooking appliance is also according to the prior art in the documents DE 103 18 860 . DE 103 18 859 and DE 103 18 861 documented. In this embodiment, reflecting means are also arranged at different levels in shafts in the region of the door, which allow the emission of the light beams in different planes. The design of the light shaft is designed such that the expansion of the reflection means increases at least in a direction transverse to the radiated light from the light source in the direction of the reflection means with increasing distance of the respective reflection means of the light source such that a portion of the light rays unhindered on the farther remote arranged reflecting means passes.

Bei diesen aus dem Stand der Technik bekannten Beleuchtungsvorrichtungen ergibt sich das Problem, dass eine optimale Ausleuchtung des Behandlungsraumes nicht gegeben ist, zumal die eingeleitete Lichtstrahlenmenge nicht optimal genutzt wird. Bedingt ist dies auch dadurch, dass nur Spezialleuchtmittel mit geringem Wirkungsgrad bei den bekannten Beleuchtungsvorrichtungen für ein Haushaltsgerät zum Einsatz kommen.In these known from the prior art lighting devices there is the problem that an optimal illumination of the treatment room is not given, especially since the light beam amount introduced is not optimally utilized. This is also due to the fact that only special lighting with low efficiency in the known lighting devices for a household appliance are used.

Der Erfindung stellt sich somit das Problem, eine Beleuchtungsvorrichtung mit einem Lichtschacht für ein Haushaltsgerät mit einem Behandlungsraum derart weiter zu bilden, dass eine wesentlich verbesserte Leuchteffizienz im Behandlungsraum bewirkt ist.The invention thus raises the problem of further developing a lighting device with a light shaft for a domestic appliance with a treatment space in such a way that a significantly improved luminous efficiency is brought about in the treatment space.

Erfindungsgemäß wird dieses Problem mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention, this problem is solved by the features of patent claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

Bei der erfindungsgemäßen Beleuchtungsvorrichtung sind im Lichtschacht einzelne Reflektionsmittel angeordnet, die hinsichtlich ihrer Ausdehnung in beide Hauptausdehnungsrichtungen der Ebene quer zur Abstrahlrichtung der Lichtstrahlen derart unterschiedlich ausgebildet sind, dass eine gegenseitige Beschattung der Reflektorflächen verhindert ist. Aufgrund dieser Ausbildung ergibt sich eine Abstrahlwirkung in Richtung des Behandlungsraumes auf den unterschiedlichen Ebenen auch in der Tiefe des Behandlungsraumes. Hierzu umfassen die als Reflektionsmittel ausgebildeten einzelnen Reflektoren im Lichtschacht Reflektorflächen, deren reflektierbare Bereiche derart unterschiedlich ausgestaltet sind, dass eine gegenseitige Beschattung der Reflektorflächen verhindert ist. Die einzelnen vorzugsweise streifenförmigen Reflektorflächen sind jeweils vorzugsweise unter einer 45°-Lage zur Abstrahlrichtung der Lichtstrahlen im Lichtschacht angeordnet.In the illumination device according to the invention individual reflection means are arranged in the light shaft, which are formed differently in terms of their extension in both Hauptausdehnungsrichtungen the plane transverse to the emission direction of the light beams, that a mutual shading of the reflector surfaces is prevented. Due to this design results in a radiation effect in the direction of the treatment room on the different levels in the depth of the treatment room. For this purpose, the individual reflectors formed as a reflection means in the light shaft reflector surfaces whose reflective areas are configured differently such that a mutual shading of the reflector surfaces is prevented. The individual preferably strip-shaped reflector surfaces are each preferably arranged at a 45 ° position to the emission direction of the light beams in the light shaft.

Hierbei verfügt der einzelne streifenförmige Reflektor vorzugsweise über seine Länge ausgesparte Bereiche, so dass oberhalb des Behandlungsraumes eingespeiste Lichtstrahlen auch bis auf tiefer liegende Reflektorflächen ungehindert durchdringen können, und eine hinreichende Lichtausbeute auch noch auf den tiefer liegenden Reflektorflächen gegeben ist.In this case, the individual strip-shaped reflector preferably has areas which are recessed over its length, so that light beams introduced above the treatment space can penetrate unhindered even to deeper reflector surfaces, and a sufficient light output is also provided on the reflector surfaces lying deeper.

In vorteilhafter Weiterbildung ist das Leuchtmittel mit einem Parabolspiegelgehäuse umgeben. Dabei können insbesondere Standardleuchtmittel wie zum Beispiel Leuchtstoffröhren mit einem wesentlich besseren Wirkungsgrad verwendet werden. Diese erstrecken sich über die streifenförmigen Reflektorflächen. Das Parabolspiegelgehäuse ist über ein thermisches Isoliermittel an dem Lichtschacht angeordnet, wobei hier das Isoliermittel vorzugsweise eine Glasscheibe ist. Dabei ist in vorteilhafter Weise zumindest in einer der Seitenwand des Behandlungsraumes oder in der Behandlungsraumtür eine flächige Glasscheibe angeordnet, die die Seitenwand des flach ausgebildeten Lichtschachtes bildet. Diese Ausbildung bewirkt, dass im Wesentlichen über die gesamte Wandfläche die Beleuchtungsvorrichtung wirken kann, weil, wie bereits schon oben ausgeführt, das einzelne Reflektionsmittel hinsichtlich seiner Ausdehnung beide Hauptsausdehnungsrichtungen in der Ebene quer zur Abstrahlrichtung der Lichtstrahlen abdeckt. Dies ermöglicht eine Beleuchtungsvorrichtung bereit zu stellen, die eine Flächenabstrahlung ermöglicht, wobei insbesondere der Lichtschacht aufgrund der unterschiedlich ausgebildeten Reflektorflächen auch sehr schmal bauend ausgebildet werden kann.In an advantageous embodiment, the light source is surrounded by a parabolic mirror housing. In particular, standard illuminants such as fluorescent tubes can be used with a much better efficiency. These extend over the strip-shaped reflector surfaces. The parabolic mirror housing is arranged on the light shaft via a thermal insulating means, in which case the insulating means is preferably a glass pane. In this case, a flat glass pane is advantageously arranged at least in one of the side wall of the treatment room or in the treatment room door, which forms the side wall of the flat-shaped light shaft. This design has the effect that the illumination device can act essentially over the entire wall surface, because, as already explained above, the individual reflection means covers both main expansion directions in the plane transverse to the emission direction of the light rays. This makes it possible to provide a lighting device which enables an area radiation, wherein, in particular, the light shaft can also be made very narrow due to the differently configured reflector surfaces.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt

Figur 1
eine geschnittene Frontansicht eines Behandlungsraumes mit integrierter Beleuchtungsvorrichtung;
Figur 2
eine isolierte Darstellung der Beleuchtungsvorrichtung in Frontansicht; und
Figur 3
eine isolierte Darstellung des Reflektionsmittels einmal in Frontansicht sowie mit korrespondierender Seitenansicht.
An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows
FIG. 1
a sectional front view of a treatment room with integrated lighting device;
FIG. 2
an isolated view of the lighting device in front view; and
FIG. 3
an isolated representation of the reflection means once in front view and with a corresponding side view.

Die Figur 1 zeigt in der geschnittenen Ansicht eine Beleuchtungsvorrichtung 1 für ein Haushaltsgerät 2 mit einem Behandlungsraum 3, wobei hier beispielsweise der Behandlungsraum 3 als eine Backmuffel oder aber auch als Kühlraum ausgebildet sein kann. Die Beleuchtungsvorrichtung 1 umfasst dabei zumindest ein Leuchtmittel 4, welches außerhalb des Behandlungsraumes 3 an dem Haushaltsgerät 2 angeordnet ist. Wie aus der geschnittenen Ansicht der Figur 1 zu erkennen ist, wirkt dabei das Leuchtmittel 4 mit einem Lichtschacht 5 zusammen, der an einer der Wände des Behandlungsraumes 3 oder einer nicht näher dargestellten Behandlungsraumtür angeordnet ist. Wie aus der Darstellung zu erkennen ist, werden zur Ausleuchtung des Behandlungsraumes 3 von dem Leuchtmittel 4 erzeugte Lichtstrahlen 6 durch im Lichtschacht 5 angeordnete Reflektionsmittel 7.1, 7.2 und 7.3 in Richtung des Behandlungsraumes 3 umgelenkt. Die Lichtstrahlen 6 treten dabei durch eine in der Wand oder der Behandlungsraumtür angeordnete transparente Glasscheibe 8 in den Behandlungsraum 3 ein.The FIG. 1 shows in the sectional view of a lighting device 1 for a household appliance 2 with a treatment room 3, in which case, for example, the treatment room 3 may be formed as a baking muffle or as a cooling room. In this case, the lighting device 1 comprises at least one lighting means 4, which is arranged outside the treatment space 3 on the household appliance 2. As seen from the cut view of FIG. 1 can be seen, the light source 4 cooperates with a light shaft 5, which is arranged on one of the walls of the treatment room 3 or a treatment room door, not shown. As can be seen from the illustration, for the illumination of the treatment chamber 3 light beams 6 generated by the light source 4 are deflected by means arranged in the light shaft 5 reflection means 7.1, 7.2 and 7.3 in the direction of the treatment chamber 3. The light beams 6 enter through a arranged in the wall or the treatment room door transparent glass 8 into the treatment room 3 a.

Wie aus der Figur 1 zu erkennen ist, nimmt die Ausdehnung der Reflektionsmittel 7.1 bis 7.3 quer zu den von dem Leuchtmittel 4 in Richtung der Reflektionsmittel 7.1 bis 7.3 abgestrahlten Lichtstrahlen 6 mit zunehmender Entfernung des jeweiligen Reflektionsmittels 7.1 bis 7.3 von dem Leuchtmittel 4 derart zu, dass ein Teil der Lichtstrahlen 6 ungehindert auf das weiter entfernte angeordnete Reflektionsmittel 7.2 bzw. 7.3 gelangt. Wie insbesondere in der Zusammenschau der Figur 1 und 2 deutlich wird, ist das einzelne Reflektionsmittel 7.1 bis 7.3 hinsichtlich seiner Ausdehnung in beide Hauptausdehnungsrichtungen der Ebene quer zur Abstrahlrichtung der Lichtstrahlen 6 erweitert ausgebildet.Like from the FIG. 1 can be seen, the expansion of the reflection means 7.1 to 7.3 transversely to the emitted from the light source 4 in the direction of the reflection means 7.1 to 7.3 light rays 6 with increasing distance of the respective reflection means 7.1 to 7.3 from the light source 4 such that a portion of the light rays 6 unimpeded reaches the more distant arranged reflecting means 7.2 and 7.3. As in particular in the synopsis of FIGS. 1 and 2 becomes clear, the individual reflection means 7.1 to 7.3 is formed extended in terms of its extension in both main directions of extension of the plane transverse to the emission direction of the light beams 6.

So umfassen die als Reflektionsmittel 7.1 bis 7.3 ausgebildeten einzelnen Reflektoren im Lichtschacht 5 streifenförmige Reflektorflächen 9.1, 9.2 und 9.3. Die reflektierbaren Bereiche der streifenförmigen Flächen 9.1 bis 9.3 sind derart unterschiedlich ausgestaltet, dass eine durch auftreffende Lichtstrahlen 6 verursachte gegenseitige Beschattung der Reflektorflächen 9.1 bis 9.3 verhindert ist. Somit wird deutlich, dass die Flächen 9.1 bis 9.3 in der Figur 2 unmittelbar von den Lichtstrahlen 6 getroffen werden und diese auch entsprechend umgelenkt werden und in den Behandlungsraum 3 abstrahlen. Deutlich wird, dass insbesondere auch die untere Reflektorfläche 9.3 noch die hinreichende Abstrahleffizienz in der Breite aufweist, weil die Lichtstrahlen 6 noch in beide Hauptausdehnungsrichtungen quer zur Abstrahlrichtung der Lichtstrahlen 6 wirken können.Thus, the individual reflectors 7.1 to 7.3 designed as individual reflectors in the light shaft 5 strip-shaped reflector surfaces 9.1, 9.2 and 9.3. The reflectable areas of the strip-shaped areas 9.1 to 9.3 are designed differently such that mutual shading of the reflector areas 9.1 to 9.3 caused by incident light beams 6 is prevented. Thus, it becomes clear that the areas 9.1 to 9.3 in the FIG. 2 be taken directly from the light rays 6 and these are also deflected accordingly and radiate into the treatment room 3. It is clear that in particular the lower reflector surface 9.3 still has the sufficient emission efficiency in the width, because the light beams 6 can still act in both main directions of extension transversely to the emission direction of the light beams 6.

Wie aus der Figur 1 zu erkennen ist, sind die einzelnen streifenförmigen Reflektorflächen 9.1, 9.2 und 9.3 vorzugsweise unter einer 45°-Lage zur Abstrahlrichtung der Lichtstrahlen 6 im Lichtschacht 5 angeordnet. Wie bereits schon beschrieben, weist die einzelne streifenförmige Reflektorfläche 9.1, 9.2 oder 9.3 über seine Länge ausgesparte Bereiche auf, wie dies beispielsweise bei der Reflektorfläche 9.2 gegeben ist.Like from the FIG. 1 can be seen, the individual strip-shaped reflector surfaces 9.1, 9.2 and 9.3 are preferably arranged at a 45 ° position to the emission direction of the light beams 6 in the light shaft 5. As already described, the individual strip-shaped reflector surface 9.1, 9.2 or 9.3 has recessed regions along its length, as is the case for example with the reflector surface 9.2.

Was die Einbindung insbesondere des Leuchtmittels 4 betrifft, so ist das Leuchtmittel 4 mit einem Parabolspiegelgehäuse 10 umgeben, wobei in dem Parabolspiegelgehäuse 10 eine Leuchtstoffröhre als Leuchtmittel 4 vorgesehen werden kann, wie sie insbesondere in der Figur 2 deutlich zu erkennen ist. Wie aus der Zusammenschau der Figur 1 und 2 zu erkennen ist, ist das Parabolspiegelgehäuse 10 über ein thermisches Isoliermittel 12 an dem Lichtschacht 5 angeordnet. Hierbei ist das Isoliermittel eine Glasscheibe 12. Wie in der Figur 1, aber auch in Zusammenschau mit der Figur 2 deutlich wird, bildet zumindest in einer der Seitenwand des Behandlungsraumes 3 oder einer Behandlungsraumtür, die nicht näher dargestellt ist, eine flächige Glasscheibe 8 eine Seitenwand des flach ausgebildeten Lichtschachtes 5.As far as the integration of the luminous means 4 in particular is concerned, the luminous means 4 is surrounded by a parabolic mirror housing 10, wherein in the parabolic mirror housing 10 a fluorescent tube can be provided as the illuminant 4, as described in particular in US Pat FIG. 2 is clearly visible. As from the synopsis of FIGS. 1 and 2 can be seen, the parabolic mirror housing 10 is arranged on the light shaft 5 via a thermal insulation means 12. Here, the insulating agent is a glass pane 12. As in the FIG. 1 , but also in synopsis with the FIG. 2 becomes clear forms, at least in one of the side wall of the treatment room 3 or a treatment room door, which is not shown in detail, a flat glass pane 8 a side wall of the flat formed light shaft fifth

Die Figur 3 zeigt eine weitere Ausführungsform der erfindungsgemäßen Reflektionsmittels 7.1 bis 7.5, wobei hierbei die Reflektionsmittel 7.1 bis 7.5 über Reflektorflächen 9.1, 9.2, 9.3, 9.4 und 9.5 verfügen. Deutlich wird bei dieser Variation der Reflektorflächen 9.1 bis 9.5, dass aufgrund der Ausgestaltung der unterschiedlichen Reflektorflächen in beide Hauptausdehnungsrichtungen quer zur Abstrahlrichtung der Lichtstrahlen 6 eine hinreichende Lichtausbeute auch noch auf der untersten Reflektorfläche 9.5 erreicht wird. So sind die einzelnen streifenförmigen Reflektorflächen 9.1 bis 9.5 ebenfalls vorzugsweise unter einer 45°-Lage zur Abstrahlrichtung der Lichtstrahlen 6 im Lichtschacht 5 angeordnet, wobei die einzelnen streifenförmigen Reflektorflächen 9.1 bis 9.5 über ihre Länge auch ausgesparte Bereiche aufweisen, die insbesondere dafür Sorge tragen, dass auch auf den tiefer liegenden Reflektorflächen 9.2 bis 9.5 noch eine hinreichende Lichtausbeute für den Behandlungsraum 3 vorgehalten werden kann.The FIG. 3 shows a further embodiment of the inventive reflection means 7.1 to 7.5, in which case the reflection means 7.1 to 7.5 have reflector surfaces 9.1, 9.2, 9.3, 9.4 and 9.5. It is clear in this variation of the reflector surfaces 9.1 to 9.5, that due to the design of the different reflector surfaces in both Main extension directions transverse to the emission direction of the light beams 6, a sufficient light output even on the lowest reflector surface 9.5 is achieved. Thus, the individual strip-shaped reflector surfaces 9.1 to 9.5 are also preferably arranged at a 45 ° position to the emission direction of the light beams 6 in the light shaft 5, wherein the individual strip-shaped reflector surfaces 9.1 to 9.5 have over their length also recessed areas, which in particular ensure that Even on the lower reflector surfaces 9.2 to 9.5 still a sufficient light output for the treatment room 3 can be kept.

Claims (9)

  1. Illumination device (1) for a domestic appliance (2) having a processing chamber (3), comprising at least one lighting means (4) which is arranged outside the processing chamber (3) on the domestic appliance (2), the lighting means (4) cooperating with at least one light shaft (5), which is arranged on one of the walls of the processing chamber (3) or on the processing chamber door, and it being possible for light beams (6) generated by the lighting means (4) to be reflected in the direction of the processing chamber (3) by reflection units (7.1 to 7.5) arranged in the light shaft (5), in order to light up the processing chamber (3), and to be introduced into the processing chamber (3) through transparent regions in the wall or the processing chamber door, the extent of the reflection units (7.1 to 7.5), at least in a direction transverse to the light beams (6) radiated towards the reflection units (7.1 to 7.5) by the lighting means (4), increasing with increasing distance of the respective reflection unit (7.1 to 7.5) from the lighting means (4), in such a way that some of the light beams (6) reach the reflection units (7.2 to 7.5) which are arranged at a greater distance away without obstruction, characterised in that the individual reflectors, formed as reflection units (7.1 to 7.5), in the light shaft (5) comprise reflector surfaces (9.1 to 9.5) of which the reflective regions are configured differently, in the two main extension directions of the plane transverse to the direction of radiation of the light beams (6), in such a way as to prevent mutual shadowing of the reflective regions of the reflective surfaces (9.1 to 9.5).
  2. Illumination device according to claim 1, characterised in that the reflective surfaces (9.1 to 9.5) are formed in the shape of strips.
  3. Illumination device according to claim 2, characterised in that the individual strip-shaped reflector surfaces (9.1 to 9.5) are each preferably arranged in a position at 45° to the direction of radiation of the light beams (6) in the light shaft (5).
  4. Illumination device according to claims 1 to 3, characterised in that the individual strip-shaped reflector comprises recessed regions over the length thereof.
  5. Illumination device according to claims 1 to 4, characterised in that the lighting means (4) is surrounded by a parabolic mirror housing (10).
  6. Illumination device according to claims 1 to 5, characterised in that the lighting means (4) is formed as a fluorescent tube.
  7. Illumination device according to either claim 5 or claim 6, characterised in that the parabolic mirror housing (10) is arranged on the light shaft (5) via a heat-insulation means (12).
  8. Illumination device according to claim 7, characterised in that the insulating means is a glass pane (12).
  9. Illumination device according to claims 1 to 8, characterised in that a planar glass pane (8) is arranged at least in one of the side walls of the processing chamber (3) or in the processing chamber door, and forms the side wall of the light shaft (5) which is formed so as to be planar.
EP07020484A 2006-11-16 2007-10-19 Illumination device for a domestic appliance with a processing chamber Not-in-force EP1923621B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006054456A DE102006054456A1 (en) 2006-11-16 2006-11-16 Lighting device for a household appliance with a treatment room

Publications (2)

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EP1923621A1 EP1923621A1 (en) 2008-05-21
EP1923621B1 true EP1923621B1 (en) 2010-03-10

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EP07020484A Not-in-force EP1923621B1 (en) 2006-11-16 2007-10-19 Illumination device for a domestic appliance with a processing chamber

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US (1) US7731381B2 (en)
EP (1) EP1923621B1 (en)
AT (1) ATE460621T1 (en)
DE (2) DE102006054456A1 (en)

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Also Published As

Publication number Publication date
ATE460621T1 (en) 2010-03-15
EP1923621A1 (en) 2008-05-21
US7731381B2 (en) 2010-06-08
DE102006054456A1 (en) 2008-05-29
DE502007003068D1 (en) 2010-04-22
US20080123325A1 (en) 2008-05-29

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