EP2251588B1 - Lamp for household device and household device, in particular for preparing food, with a lamp - Google Patents

Lamp for household device and household device, in particular for preparing food, with a lamp Download PDF

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Publication number
EP2251588B1
EP2251588B1 EP10160449.4A EP10160449A EP2251588B1 EP 2251588 B1 EP2251588 B1 EP 2251588B1 EP 10160449 A EP10160449 A EP 10160449A EP 2251588 B1 EP2251588 B1 EP 2251588B1
Authority
EP
European Patent Office
Prior art keywords
light
lamp
cover
housing part
light source
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.)
Active
Application number
EP10160449.4A
Other languages
German (de)
French (fr)
Other versions
EP2251588A2 (en
EP2251588A3 (en
Inventor
Konrad Bleier
Frank Wittrock
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2251588A2 publication Critical patent/EP2251588A2/en
Publication of EP2251588A3 publication Critical patent/EP2251588A3/en
Application granted granted Critical
Publication of EP2251588B1 publication Critical patent/EP2251588B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0004—Personal or domestic articles
    • F21V33/0044—Household appliances, e.g. washing machines or vacuum cleaners
    • 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
    • F21V29/15—Thermal insulation
    • 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
    • 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
    • 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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lamp for a household appliance, which has at least one light source and a translucent cover on the front side, which is connected to a housing part. Furthermore, the invention relates to a household appliance with a lamp.
  • lamps are used to illuminate the cooking space. Since it usually gets very warm in the cooking chamber when the domestic appliance is in operation, the lamp is exposed to these conditions. Precisely when they are arranged in the cooking chamber or at least partially extend into the cooking chamber, specific lamp types can be impaired or damaged as a result. This temperature effect is relatively unproblematic with conventional oven lamps that have an incandescent lamp. However, these require a relatively large amount of energy during operation.
  • Such a lamp disclose the EP 0 454 969 A2 , which discloses a lighting device for a stove, the GB 216,423 which discloses an improvement in lighting of a bakery oven and which DE 86 09 316 U1 , which reveals an oven.
  • EP 446 692 A1 a lighting device with light guides, in particular for cold rooms and explosion-proof rooms and the WO 2008/047335 A1 Improvements to display case lighting.
  • a lamp according to the invention for a domestic appliance comprises at least one light source.
  • the lamp includes a front translucent cover.
  • This Cover is connected to a housing part of the lamp.
  • the light source is arranged on the side of the housing part facing away from the cover outside of the housing part.
  • the housing part is tapered to the side.
  • At least one transparent cover element is arranged in the beam path of the light source between the cover and the light source, light from the light source being able to be emitted from the lamp through the cover element and the cover.
  • a cover element is preferably arranged on the upper side of the housing part facing the light source.
  • the cover element thus serves as a kind of cover of the housing part, so that the cover and the cover element are arranged on the opposite sides of the housing part.
  • the configuration enables the cover element to be fastened as well as possible.
  • this arrangement so to speak, one behind the other and the positioning between the cover element and the cover arranged in a row with respect to the view in the longitudinal axis of the lamp allows the light from the light source to be emitted particularly easily and without complicated detours and distractions through these two components is.
  • the housing part has ventilation openings through which heat can be dissipated from a cavity formed by the housing part and the cover.
  • a hollow chamber is formed by the housing part, the cover and a cover element arranged in particular on the housing part, so that when temperature is applied via the side of the cover, the heat can initially be kept in this cavity for the most part and not in large quantities via the cover element, even up to to the light source.
  • This quasi-first heat accumulation space then enables this heat to escape through the ventilation openings in the housing part and overheating does not occur in this cavity.
  • the ventilation openings are designed in such a way that the escaping heat is not conducted to the light source.
  • the ventilation openings are formed in an outer wall of the housing part that is positioned obliquely downwards relative to the horizontal. The heat can thus from the Cavity rise to the top and automatically escape from the cavity through the vents.
  • the arrangement of the components cover, cover element and housing part on the one hand and the ventilation openings in the housing part on the other hand provide a particularly advantageous concept for the thermal decoupling of the light source from temperature loading of the lamp acting on the side of the cover.
  • the lamp preferably has a light shaft which is arranged on the side of the housing part which is remote from the cover, the light from the light source being able to be guided through the light shaft to the cover element.
  • the light shaft is preferably arranged coaxially with the axis of the lamp.
  • the light shaft is preferably fastened directly to the upper side of the housing part and connected to it.
  • the cavity in the light well is preferably separated, in particular thermally decoupled, from the cavity between the housing part and the cover by the cover element.
  • the light well is formed in a straight line and is in particular attached to a housing part.
  • This configuration also means that the light shaft is arranged directly in front of the housing part in the viewing direction along the longitudinal axis of the lamp, viewed from the light source, so that no necessary light deflection elements or the like are required here either.
  • the components mentioned are therefore arranged in particular in the main emission direction of the light source, which corresponds in particular to the longitudinal axis of the lamp or, if there are several light sources, at least one light source has a main emission direction parallel to this longitudinal axis of the lamp.
  • the at least one light source is arranged on the end of the light well that faces away from the housing part, in particular outside of the light well.
  • this allows for easy access to the light source and guarantees it there is also an additional cooling option for the light source with cooling air.
  • a carrier element which carries the at least one light source, is preferably arranged on the end of the light shaft facing away from the housing part. The mechanically stable attachment can thereby be guaranteed.
  • the at least one light source is preferably arranged on a circuit carrier which is held by the carrier element.
  • the at least one light source is arranged on a heat sink which is connected to the carrier element.
  • this heat sink enables particularly efficient heat dissipation from the light source and in particular the circuit carrier, and on the other hand the mechanically stable connection of the carrier element to this heat sink can be particularly suitable for holding the components.
  • the carrier element preferably has openings through which cooling air can flow for cooling the at least one light source.
  • the carrier element is U-shaped in cross section. It can also be designed in such a way that at its corner points it only has upright columns with which the heat sink is held. As a result, the flow of cooling air can be further improved.
  • a further translucent cover element and/or an optical element for deflecting the light beam and/or an optical element for bundling or widening the light beam is preferably arranged in the light well.
  • the inside of the light shaft is designed with a light-reflecting layer, at least in some areas.
  • the light losses can on the one hand be further reduced and the use of a further cover element and/or an optical element can ensure that the light is concentrated or widened for the best possible light emission and uniform illumination of a room.
  • Mirrors or lenses etc. can be provided as optical elements.
  • At least one light source is a light-emitting diode and thus a light-emitting semiconductor component.
  • This can be particularly compact and small and also enables particularly energy-efficient operation.
  • the design of the lamp enables problem-free use under relatively high temperature ambient conditions, as is the case, for example, in ovens or the like. Since light-emitting diodes are usually very temperature-sensitive, the lamp and its components can ensure that the light source is exposed to relatively low temperature loads even when the household appliance is in operation and the lamp can nevertheless be arranged at least in certain areas within the temperature-loaded room.
  • the invention relates to a household appliance, in particular for preparing food, which has a lamp according to the invention or an advantageous embodiment thereof.
  • the domestic appliance can be designed, for example, as an oven with a cooking space.
  • this domestic appliance has a receiving space, in particular a cooking space, to which heat can be applied by a heating device, the lamp being arranged to illuminate the receiving space and the cover of the lamp extending at least partially into the receiving space.
  • the best possible illumination of the recording space can be guaranteed on the one hand, and particularly energy-efficient operation can be guaranteed on the other hand, particularly when light-emitting diodes are used as light sources, with precisely these light sources then being positioned outside of the recording space and excessive heat being applied to the light source can be avoided.
  • the lamp is preferably arranged in the ceiling of the accommodation space.
  • this is installed in the ceiling in a gas-tight and moisture-tight manner.
  • the housing part is arranged in a sealing manner with respect to the ceiling of the receiving space.
  • a design made of plastic can be provided.
  • the housing part and the light shaft can also be detachably connected in a non-destructive manner be, in this regard, a screw connection or a plug connection or a snap-in connection can be provided.
  • the light shaft and the carrier element can be designed in one piece.
  • a realization made of plastic can also be provided here.
  • the light well and the carrier part are designed to be detachable without being destroyed, with reference being made to those of how they can be implemented between the housing part and the light well with regard to specific examples.
  • the cover is detachably connected to the housing part in a non-destructive manner, it also being possible for a screw connection or a plug-in connection or a snap-in connection to be provided here in particular.
  • the at least one cover element which is preferably arranged on the upper side within the housing part on the housing part, is also preferably arranged on the housing part so that it can be detached in a non-destructive manner.
  • a plug-in connection can also be provided here as an advantageous embodiment.
  • the at least one arrangement of the cover element enables a thermal separation between the cavity in the arrangement formed between the cover and the housing part and the cavity in the light well to be achieved.
  • the cover element can be made of a glass material and can be clear, opaque or embodied as a diffuser lens. This cover element can also be glued into the housing part in addition to a simple insertion in the form of an insertion or clamping.
  • the light well can also be designed in multiple stages, with several cover elements being arranged in this connection. A further improved thermal decoupling of the light source can then be achieved by these several cover elements, since additional cavities are formed, through which heat buffering can be achieved.
  • the light from the at least one light source can be bundled and thus radiated up to the cover and out of the cover with the lowest possible losses.
  • each light source has an associated lens.
  • This can be provided, for example, in an embodiment of the lamp with a plurality of light-emitting diodes.
  • the bundled light can then be scattered again through the last cover element furthest away from the light source or through the cover in order to be able to achieve the most uniform possible illumination of the room to be illuminated with the lamp.
  • this cover element and/or the cover is designed as a milky, cloudy disk or as a diffuser lens.
  • a temperature sensor can also be arranged, which switches off the light-emitting diodes or regulates them down if the temperature is too high, in order to protect them from damage.
  • the circuit carrier which can be made of known materials or ceramics, is preferably glued to the heat sink, which is preferably made of aluminum, with a heat-conducting adhesive.
  • the circuit carrier and the heat sink can also be designed in one piece from ceramic.
  • the heat sink can be thermally coupled to an outer housing of the domestic appliance in order to increase the cooling surface.
  • the cover element or elements are preferably made of a material that is not thermally conductive or has poor thermal conductivity.
  • glass can be provided.
  • In 1 is a perspective view of a domestic appliance for preparing food, which is designed as a baking oven 1.
  • the oven 1 comprises a receiving space designed as a cooking chamber 2 into which foodstuffs can be placed for preparation.
  • the cooking chamber 2 is delimited by a muffle 3 or its walls, with a front opening being formed through a door 4 can be closed.
  • At least one lamp 6 is formed in a cover 5 of the muffle 3 . Both the number and the position of the lamp 6 are merely exemplary.
  • the cooking chamber 2 is illuminated with the lamp 6 when the oven 1 is in operation.
  • devices for generating heat such as radiators, generate heat in the cooking chamber 2, through which the food can be cooked. This heat also acts on the lamp 6, with the design of the lamp 6 making it possible to prevent the light source of the lamp 6 from being subjected to heat in an undesirable manner.
  • In 2 1 is a schematic representation of a sectional view of an exemplary embodiment of the lamp 6 according to its arrangement in the ceiling 5.
  • the lamp 6 extends into the cooking chamber 2 in certain areas.
  • An insulating material 7 is attached to the ceiling 5 outside of the cooking chamber 2 .
  • the lamp 6 comprises a light-transmitting cover 9 on the front side, which is made of glass, for example.
  • the cover 9 extends into the cooking chamber 2.
  • the lamp 6 also includes a housing part 10, which is formed in one piece from plastic, for example.
  • the cover 9 is screwed into the housing part 10 .
  • the housing part 10 is connected to the cover 5 in such a way that the opening 8 is sealed gas-tight and also moisture-tight. A separate sealing element can be provided for this purpose.
  • the cover 9 is screwed to the housing part 10 at a lower end 12 thereof, a screw connection 11 being provided for this purpose in the exemplary embodiment.
  • the cover 9 can thus be detached from the housing part 10 without being destroyed.
  • a cavity 13 is formed by the housing part 10 and the cover 9 .
  • the housing part 10 has at its upper end 14 and thus at the end 14 facing away from the cover 9 an opening which is covered by a first transparent cover element 16 .
  • the cover element 16 is on the inside of the Housing part 10 attached, for example, a pinch or an insertion or a gluing can be provided.
  • the cover 9 and the cover element 16 are arranged on opposite sides 12 and 14 of the housing part 10, but arranged in series with one another in the direction of the longitudinal axis of the lamp, which in the exemplary embodiment is the same as the main emission direction H of at least one centrally positioned light source 23.
  • the opening 15 is covered by the cover element 16 so that the cavity 13 is closed via the opening 15 .
  • the cover element 16 is made of a translucent material, in particular glass, so that in addition to transparency, thermal decoupling of the light source 23 can also be achieved, with the cover element 16 being coated accordingly or having a corresponding material component.
  • the housing part 10 tapers towards the upper end 14, ventilation openings 17 and 18 being formed on this taper and on the oblique outer wall produced thereby.
  • the number of ventilation openings 17 and 18 is only an example; several ventilation openings of this type can also be provided, which are not identified in any more detail.
  • the heat W generated in the cavity 13 during operation of the baking oven 1 can be dissipated via these ventilation openings 17 and 18 in accordance with the arrow illustration.
  • a light shaft 19 Directly adjoining the upper end 14 is a light shaft 19 which, on the one hand, contributes to guiding the light L of the light source 23 and to further creating a distance between the light source 23 and the cooking chamber 2 .
  • the light shaft 19 has an inner side 20 which is made of a highly light-reflecting material, at least in some areas.
  • the light well 19 is coaxial with the longitudinal axis of the lamp 6 .
  • the light shaft 19 is designed in a straight line, so that the light L of the light source 23 can be emitted in the main emission direction and does not have to be deflected.
  • a further translucent cover element 22 is arranged on an upper end 21 of the light shaft 19 facing away from the housing part 10 .
  • This can also be designed as an optical element in the form of a converging lens.
  • at least one further cover element and/or one optical element is arranged in the light shaft 19, so that several are also separated in the light shaft 19 Cavities are formed in a cascade. In the embodiment shown, only the entire cavity 28 is shown. The thermal decoupling of the at least one light source 23 can be further improved by this configuration of cavities 13 and 28 one behind the other.
  • the light source 23 is in the form of a light-emitting diode, which is arranged on a circuit carrier 24 .
  • the light source 23 is formed outside of the light well 19 and positioned adjacent to the top 21 of the light well 19 .
  • the light source 23 and the circuit carrier 24 are attached to a heat sink 25 in the exemplary embodiment.
  • This cooling body 25 also enables the heat of the light source 23 to be dissipated and is preferably thermally coupled to a housing (not shown) of the oven 1 so that an enlarged design of the cooling body can be produced for heat dissipation.
  • the lamp 6 includes a carrier element 26, which in 2 is not recognizable.
  • the carrier element 26 is connected to the light shaft 19 and the heat sink 25 and carries the heat sink 25 and thus also the circuit carrier 24 and the at least one light source 23.
  • the carrier element 26 is designed in one piece and comprises openings through which cooling air K can flow in laterally and out again on the other side, so that the light source 23 can be cooled by the cooling air flow K.
  • the components of the lamp 6 are positioned in series with one another in the main emission direction H of the centrally positioned light source 23 and thus also the longitudinal axis of the lamp 6, with first the light source 23, then the light well 19, then the first cover element 16, the housing part 10 and the cover 9 follow.
  • the light L from the light source 23 is essentially radiated in the main emission direction H through the light well 19 and the cover element 16 and the cover 9 into the cooking chamber 2 .
  • maximum temperatures of up to approximately 70° C. occur.
  • a plurality of light sources 23 in the form of a plurality of light-emitting diodes is preferably used.
  • FIG. 3 a side view of the lamp 6 is shown.
  • the components can be seen from the outside, with the connection between the light shaft 19 and the heat sink 25 by means of the carrier element 26 being particularly visible.
  • the carrier element 26 has relatively large openings 27a, through which cooling air K can flow through the carrier element 26 in the direction of flow perpendicular to the figure sheet and can thus cool the plurality of light sources 23a, 23b and 23c.
  • additional openings 27b to be formed in the carrier element 26, as a result of which a cooling air flow in the plane of the figure can cool the light sources 23a to 23c from the other side, as it were.
  • In 4 12 is a sectional perspective view of the lamp 6 as shown in FIG 3 shown, with the cutting plane in 3 lies in the plane of the figure and the representation in 4 shows a representation rotated somewhat about the lamp axis.
  • the structure of the carrier element 26 can be seen, which has columns that project upwards at the corners, through which the connection to the heat sink 25 is provided.
  • the underside of the cooling body rests on the carrier webs of the carrier element 26 .
  • the circuit carrier 24 is fastened to this underside of the heat sink 25, and in this regard bonding with a thermally conductive adhesive is provided.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Electric Stoves And Ranges (AREA)

Description

Die Erfindung betrifft eine Lampe für ein Hausgerät, welche zumindest eine Lichtquelle und eine frontseitige lichtdurchlässige Abdeckung aufweist, die mit einem Gehäuseteil verbunden ist. Des Weiteren betrifft die Erfindung ein Hausgerät mit einer Lampe.The invention relates to a lamp for a household appliance, which has at least one light source and a translucent cover on the front side, which is connected to a housing part. Furthermore, the invention relates to a household appliance with a lamp.

Bei Hausgeräten, wie Backöfen oder dergleichen ist es bekannt, dass Lampen verwendet werden, um den Garraum auszuleuchten. Da es in dem Garraum im Betrieb des Hausgeräts üblicherweise sehr warm wird, ist die Lampe diesen Bedingungen ausgesetzt. Gerade wenn sie im Garraum angeordnet sind oder sich zumindest bereichsweise in den Garraum erstreckt, kann dadurch bei spezifischen Lampentypen eine Funktionsbeeinträchtigung oder eine Beschädigung auftreten. Relativ unproblematisch ist diese Temperatureinwirkung bei herkömmlichen Backofenlampen, die eine Glühlampe aufweisen. Diese benötigen im Betrieb jedoch relativ viel Energie. Eine solche Lampe offenbaren die EP 0 454 969 A2 , die eine Beleuchtungseinrichtung für einen Herd offenbart, die GB 216,423 , die eine Verbesserung in Bezug auf die Beleuchtung eines eines Bäckereiofens offenbart, sowie die DE 86 09 316 U1 , die einen Backofen offenbart.In household appliances, such as ovens or the like, it is known that lamps are used to illuminate the cooking space. Since it usually gets very warm in the cooking chamber when the domestic appliance is in operation, the lamp is exposed to these conditions. Precisely when they are arranged in the cooking chamber or at least partially extend into the cooking chamber, specific lamp types can be impaired or damaged as a result. This temperature effect is relatively unproblematic with conventional oven lamps that have an incandescent lamp. However, these require a relatively large amount of energy during operation. Such a lamp disclose the EP 0 454 969 A2 , which discloses a lighting device for a stove, the GB 216,423 which discloses an improvement in lighting of a bakery oven and which DE 86 09 316 U1 , which reveals an oven.

Ferner offenbart die EP 446 692 A1 eine Beleuchtungsvorrichtung mit Lichtleitern, insbesondere für Kühlräume und explosionsgeschützte Räume und die WO 2008/047335 A1 Verbesserungen bei Anzeigegehäusebeleuchtungen.Furthermore, the EP 446 692 A1 a lighting device with light guides, in particular for cold rooms and explosion-proof rooms and the WO 2008/047335 A1 Improvements to display case lighting.

Es ist Aufgabe der vorliegenden Erfindung, eine Lampe für ein Hausgerät zu schaffen, welche unproblematisch im Hinblick auf Wärmeeinwirkung ist und darüber hinaus energieeffizienter betrieben werden kann.It is the object of the present invention to create a lamp for a household appliance which is unproblematic with regard to the effect of heat and which can also be operated more energy-efficiently.

Diese Aufgabe wird durch eine Lampe, welche die Merkmale nach Anspruch 1 aufweist, und ein Hausgerät, welches die Merkmale nach Anspruch 12 aufweist, gelöst.This object is achieved by a lamp having the features of claim 1 and a domestic appliance having the features of claim 12.

Eine erfindungsgemäße Lampe für ein Hausgerät umfasst zumindest eine Lichtquelle. Darüber hinaus umfasst die Lampe eine frontseitige lichtdurchlässige Abdeckung. Diese Abdeckung ist mit einem Gehäuseteil der Lampe verbunden. Die Lichtquelle ist an der der Abdeckung abgewandten Seite des Gehäuseteils außerhalb des Gehäuseteils angeordnet. Das Gehäuseteil ist zur Seite hin verjüngt ausgebildet. Im Strahlengang der Lichtquelle ist zumindest ein lichtdurchlässiges Deckelement zwischen der Abdeckung und der Lichtquelle angeordnet, wobei Licht der Lichtquelle durch das Deckelement und die Abdeckung aus der Lampe abstrahlbar ist. Durch eine derartige Ausgestaltung der Lampe mit der Abdeckung und dem Deckelement kann die quasi dahinter angeordnete Lichtquelle vor Temperatureinflüssen besser geschützt werden. Des Weiteren ist die Lampe für einen energieeffizienteren Betrieb ausgelegt.A lamp according to the invention for a domestic appliance comprises at least one light source. In addition, the lamp includes a front translucent cover. This Cover is connected to a housing part of the lamp. The light source is arranged on the side of the housing part facing away from the cover outside of the housing part. The housing part is tapered to the side. At least one transparent cover element is arranged in the beam path of the light source between the cover and the light source, light from the light source being able to be emitted from the lamp through the cover element and the cover. With such a configuration of the lamp with the cover and the cover element, the light source arranged behind it can be better protected from temperature influences. Furthermore, the lamp is designed for more energy-efficient operation.

Vorzugsweise ist ein Deckelement an der der Lichtquelle zugewandten Oberseite des Gehäuseteils angeordnet. Das Deckelement dient somit quasi als Deckel des Gehäuseteils, sodass an den gegenüberliegenden Seiten des Gehäuseteils zum einen die Abdeckung und zum anderen das Deckelement angeordnet ist. Die Ausgestaltung ermöglicht zum einen eine möglichst gute Befestigung des Deckelements. Zum anderen kann durch diese quasi Hintereinanderanordnung und im Hinblick auf die Betrachtung in Längsachse der Lampe in Reihe zueinander angeordnete Positionierung zwischen dem Deckelement und der Abdeckung erreicht werden, dass das Licht der Lichtquelle besonders einfach und ohne komplizierte Umwege und Ablenkungen durch diese beiden Komponenten hindurch abstrahlbar ist.A cover element is preferably arranged on the upper side of the housing part facing the light source. The cover element thus serves as a kind of cover of the housing part, so that the cover and the cover element are arranged on the opposite sides of the housing part. On the one hand, the configuration enables the cover element to be fastened as well as possible. On the other hand, this arrangement, so to speak, one behind the other and the positioning between the cover element and the cover arranged in a row with respect to the view in the longitudinal axis of the lamp allows the light from the light source to be emitted particularly easily and without complicated detours and distractions through these two components is.

Das Gehäuseteil weist Lüftungsöffnungen auf, durch welche Wärme aus einem durch das Gehäuseteil und der Abdeckung gebildeten Hohlraum abführbar ist. Durch das Gehäuseteil, die Abdeckung und ein insbesondere an dem Gehäuseteil angeordnetes Deckelement wird somit eine Hohlkammer gebildet, sodass bei einer Temperaturbeaufschlagung über die Seite der Abdeckung die Wärme zunächst in diesem Hohlraum quasi großteils gehalten werden kann und nicht über das Deckelement in großen Mengen auch bis zur Lichtquelle vordringt. Dieser quasi erste Wärmesammelraum ermöglicht dann durch die Lüftungsöffnungen im Gehäuseteil, dass diese Wärme austreten kann und es nicht zu einer Überhitzung in diesem Hohlraum kommt. Die Lüftungsöffnungen sind insbesondere so ausgebildet, dass die austretende Wärme nicht zur Lichtquelle geführt ist. Insbesondere ist dabei vorgesehen, dass die Lüftungsöffnungen in einer gegenüber der Horizontalen schräg nach unten gestellten Außenwand des Gehäuseteils ausgebildet sind. Die Wärme kann somit aus dem Hohlraum nach oben steigen und automatisch aus dem Hohlraum über die Lüftungsöffnungen entweichen. Die Anordnung der Komponenten Abdeckung, Deckelement und Gehäuseteil einerseits und die Lüftungsöffnungen im Gehäuseteil andererseits geben ein besonders vorteilhaftes Konzept zur thermischen Entkopplung der Lichtquelle von einer über die Seite der Abdeckung einwirkenden Temperaturbeaufschlagung der Lampe.The housing part has ventilation openings through which heat can be dissipated from a cavity formed by the housing part and the cover. A hollow chamber is formed by the housing part, the cover and a cover element arranged in particular on the housing part, so that when temperature is applied via the side of the cover, the heat can initially be kept in this cavity for the most part and not in large quantities via the cover element, even up to to the light source. This quasi-first heat accumulation space then enables this heat to escape through the ventilation openings in the housing part and overheating does not occur in this cavity. In particular, the ventilation openings are designed in such a way that the escaping heat is not conducted to the light source. In particular, it is provided that the ventilation openings are formed in an outer wall of the housing part that is positioned obliquely downwards relative to the horizontal. The heat can thus from the Cavity rise to the top and automatically escape from the cavity through the vents. The arrangement of the components cover, cover element and housing part on the one hand and the ventilation openings in the housing part on the other hand provide a particularly advantageous concept for the thermal decoupling of the light source from temperature loading of the lamp acting on the side of the cover.

Vorzugsweise weist die Lampe einen Lichtschacht auf, der auf der der Abdeckung abgewandten Seite des Gehäuseteils angeordnet ist, wobei durch den Lichtschacht das Licht der Lichtquelle zum Deckelement leitbar ist. Vorzugsweise ist der Lichtschacht koaxial zur Achse der Lampe angeordnet. Durch den Lichtschacht wird quasi ein Distanzelement zwischen der Anordnung umfassend das Gehäuseteil und der Abdeckung und insbesondere des Deckelements einerseits und der Lichtquelle andererseits geschaffen. Die Lichtquelle kann somit nochmals weiter beabstandet von temperaturbeaufschlagten Komponenten der Lampe positioniert werden. Gleichzeitig kann jedoch eine besonders vorteilhafte Lichtleitung hin zur Abdeckung gewährleistet werden.The lamp preferably has a light shaft which is arranged on the side of the housing part which is remote from the cover, the light from the light source being able to be guided through the light shaft to the cover element. The light shaft is preferably arranged coaxially with the axis of the lamp. Through the light well, a spacer element is created between the arrangement comprising the housing part and the cover and in particular the cover element on the one hand and the light source on the other hand. The light source can thus be positioned further away from components of the lamp that are subject to temperature. At the same time, however, a particularly advantageous transmission of light to the cover can be ensured.

Vorzugsweise ist der Lichtschacht unmittelbar an der Oberseite des Gehäuseteils befestigt und mit diesem verbunden. Dadurch kann zum einen eine mechanisch stabile Anordnung geschaffen werden und darüber hinaus möglichst geringe Lichtverluste erzielt werden.The light shaft is preferably fastened directly to the upper side of the housing part and connected to it. As a result, on the one hand, a mechanically stable arrangement can be created and, on the other hand, the lowest possible light losses can be achieved.

Vorzugsweise ist durch das Deckelement der Hohlraum im Lichtschacht von dem Hohlraum zwischen dem Gehäuseteil und der Abdeckung separiert, insbesondere thermisch entkoppelt.The cavity in the light well is preferably separated, in particular thermally decoupled, from the cavity between the housing part and the cover by the cover element.

Vorzugsweise ist der Lichtschacht geradlinig ausgebildet und ist insbesondere an einem Gehäuseteil befestigt. Auch durch diese Ausgestaltung wird quasi in Betrachtungsrichtung entlang der Längsachse der Lampe der Lichtschacht unmittelbar von der Lichtquelle aus betrachtet vor dem Gehäuseteil angeordnet, sodass auch hier keine erforderlichen Lichtumlenkelemente oder dergleichen benötigt werden. Die genannten Komponenten sind somit insbesondere in Hauptabstrahlrichtung der Lichtquelle, welche insbesondere der Längsachse der Lampe entspricht oder bei mehreren Lichtquellen zumindest bei einer Lichtquelle eine parallele als Hauptabstrahlrichtung zu dieser Längsachse der Lampe ausgebildet ist, entlang dieser angeordnet.Preferably, the light well is formed in a straight line and is in particular attached to a housing part. This configuration also means that the light shaft is arranged directly in front of the housing part in the viewing direction along the longitudinal axis of the lamp, viewed from the light source, so that no necessary light deflection elements or the like are required here either. The components mentioned are therefore arranged in particular in the main emission direction of the light source, which corresponds in particular to the longitudinal axis of the lamp or, if there are several light sources, at least one light source has a main emission direction parallel to this longitudinal axis of the lamp.

Vorzugsweise ist die zumindest eine Lichtquelle an dem dem Gehäuseteil abgewandten Ende des Lichtschachts, insbesondere außerhalb des Lichtschachts, angeordnet. Dies ermöglicht zum einen eine einfache Zugänglichkeit zur Lichtquelle und gewährleistet darüber hinaus auch noch eine zusätzliche Kühlungsmöglichkeit der Lichtquelle mit Kühlluft.Preferably, the at least one light source is arranged on the end of the light well that faces away from the housing part, in particular outside of the light well. On the one hand, this allows for easy access to the light source and guarantees it there is also an additional cooling option for the light source with cooling air.

Vorzugsweise ist an dem dem Gehäuseteil abgewandten Ende des Lichtschachts ein Trägerelement angeordnet, welches die zumindest eine Lichtquelle trägt. Die mechanisch stabile Anbringung kann dadurch gewährleistet werden.A carrier element, which carries the at least one light source, is preferably arranged on the end of the light shaft facing away from the housing part. The mechanically stable attachment can thereby be guaranteed.

Vorzugsweise ist die zumindest eine Lichtquelle auf einem Schaltungsträger angeordnet, welcher von dem Trägerelement gehalten ist. Insbesondere ist vorgesehen, dass die zumindest eine Lichtquelle an einem Kühlkörper angeordnet ist, welcher mit dem Trägerelement verbunden ist. Durch diesen Kühlkörper wird zum einen eine besonders effiziente Wärmeabfuhr von der Lichtquelle und insbesondere dem Schaltungsträger ermöglicht, zum anderen kann die mechanisch stabile Verbindung des Trägerelements mit diesem Kühlkörper zur Halterung der Komponenten besonders geeignet erfolgen.The at least one light source is preferably arranged on a circuit carrier which is held by the carrier element. In particular, it is provided that the at least one light source is arranged on a heat sink which is connected to the carrier element. On the one hand, this heat sink enables particularly efficient heat dissipation from the light source and in particular the circuit carrier, and on the other hand the mechanically stable connection of the carrier element to this heat sink can be particularly suitable for holding the components.

Vorzugsweise weist das Trägerelement Öffnungen auf, durch welche Kühlluft zum Kühlen der zumindest einen Lichtquelle durchströmbar ist. Insbesondere ist das Trägerelement im Querschnitt U-förmig. Es kann auch so ausgebildet sein, dass es an seinen Eckpunkten lediglich nach oben stehende Säulen aufweist, mit denen der Kühlkörper gehalten ist. Dadurch kann die Durchströmung der Kühlluft nochmals verbessert werden.The carrier element preferably has openings through which cooling air can flow for cooling the at least one light source. In particular, the carrier element is U-shaped in cross section. It can also be designed in such a way that at its corner points it only has upright columns with which the heat sink is held. As a result, the flow of cooling air can be further improved.

Vorzugsweise ist im Lichtschacht ein weiteres lichtdurchlässiges Deckelement und/oder ein optisches Element zur Umlenkung des Lichtstrahls und/oder ein optisches Element zur Bündelung oder Aufweitung des Lichtstrahls angeordnet. Zusätzlich oder anstatt dessen kann vorgesehen sein, dass die Innenseite des Lichtschachts zumindest bereichsweise mit einer lichtreflektierenden Schicht ausgebildet ist. Dadurch können die Lichtverluste zum einen nochmals reduziert werden und durch die Verwendung eines weiteren Deckelements und/oder eines optischen Elements kann die Lichtbündelung oder Aufweitung zur bestmöglichen Lichtabstrahlung und gleichmäßigen Ausleuchtung eines Raums gewährleistet werden. Als optische Elemente können Spiegel oder Linsen etc. vorgesehen sein.A further translucent cover element and/or an optical element for deflecting the light beam and/or an optical element for bundling or widening the light beam is preferably arranged in the light well. In addition or instead of this, it can be provided that the inside of the light shaft is designed with a light-reflecting layer, at least in some areas. As a result, the light losses can on the one hand be further reduced and the use of a further cover element and/or an optical element can ensure that the light is concentrated or widened for the best possible light emission and uniform illumination of a room. Mirrors or lenses etc. can be provided as optical elements.

Als besonders bevorzugt erweist es sich, wenn zumindest eine Lichtquelle eine Leuchtdiode und somit ein lichtemittierendes Halbleiterbauelement ist. Diese kann besonders kompakt und klein ausgebildet sein und ermöglicht darüber hinaus einen besonders energieeffizienten Betrieb. Gerade bei derartigen Lichtquellen ist durch die Ausgestaltung der Lampe ein problemloser Einsatz bei relativ stark temperaturbeaufschlagten Umgebungsbedingungen, wie dies beispielsweise in Backöfen oder dergleichen der Fall ist, ermöglicht werden. Da Leuchtdioden üblicherweise sehr temperaturempfindlich sind, kann durch die Lampe und deren Komponenten erreicht werden, dass die Lichtquelle auch im Betrieb des Hausgeräts relativ geringen Temperaturbelastungen ausgesetzt ist und die Lampe dennoch zumindest bereichsweise innerhalb des temperaturbeaufschlagten Raums angeordnet sein kann.It proves to be particularly preferred if at least one light source is a light-emitting diode and thus a light-emitting semiconductor component. This can be particularly compact and small and also enables particularly energy-efficient operation. With light sources of this type in particular, the design of the lamp enables problem-free use under relatively high temperature ambient conditions, as is the case, for example, in ovens or the like. Since light-emitting diodes are usually very temperature-sensitive, the lamp and its components can ensure that the light source is exposed to relatively low temperature loads even when the household appliance is in operation and the lamp can nevertheless be arranged at least in certain areas within the temperature-loaded room.

Des Weiteren betrifft die Erfindung ein Hausgerät, insbesondere zum Zubereiten von Lebensmitteln, welches eine erfindungsgemäße Lampe oder eine vorteilhafte Ausgestaltung davon aufweist. Das Hausgerät kann beispielsweise als Backofen mit einem Garraum ausgebildet sein.Furthermore, the invention relates to a household appliance, in particular for preparing food, which has a lamp according to the invention or an advantageous embodiment thereof. The domestic appliance can be designed, for example, as an oven with a cooking space.

Insbesondere ist vorgesehen, dass dieses Hausgerät einen Aufnahmeraum, insbesondere einen Garraum aufweist, welcher durch eine Wärmeeinrichtung mit Wärme beaufschlagbar ist, wobei die Lampe zur Ausleuchtung des Aufnahmeraums angeordnet ist und die Abdeckung der Lampe sich zumindest bereichsweise in den Aufnahmeraum hineinerstreckt. Die bestmögliche Ausleuchtung des Aufnahmeraums kann dadurch einerseits gewährleistet werden und andererseits kann ein besonders energieeffizienter Betrieb, insbesondere wenn Leuchtdioden als Lichtquellen eingesetzt werden, gewährleistet werden, wobei gerade diese Lichtquellen dann außerhalb des Aufnahmeraums positioniert sind und eine übermäßig große Wärmebeaufschlagung der Lichtquelle vermieden werden kann.In particular, it is provided that this domestic appliance has a receiving space, in particular a cooking space, to which heat can be applied by a heating device, the lamp being arranged to illuminate the receiving space and the cover of the lamp extending at least partially into the receiving space. The best possible illumination of the recording space can be guaranteed on the one hand, and particularly energy-efficient operation can be guaranteed on the other hand, particularly when light-emitting diodes are used as light sources, with precisely these light sources then being positioned outside of the recording space and excessive heat being applied to the light source can be avoided.

Vorzugsweise ist die Lampe in der Decke des Aufnahmeraums angeordnet. Insbesondere ist diese in der Decke gasdicht und feuchtigkeitsdicht eingebracht. Insbesondere ist vorgesehen, dass das Gehäuseteil dichtend zur Decke des Aufnahmeraums angeordnet ist.The lamp is preferably arranged in the ceiling of the accommodation space. In particular, this is installed in the ceiling in a gas-tight and moisture-tight manner. In particular, it is provided that the housing part is arranged in a sealing manner with respect to the ceiling of the receiving space.

Es kann vorgesehen sein, dass das Gehäuseteil und der Lichtschacht einstückig ausgebildet sind. Es kann eine Ausgestaltung aus Kunststoff vorgesehen sein. Das Gehäuseteil und der Lichtschacht können jedoch auch zerstörungsfrei lösbar verbunden sein, wobei diesbezüglich eine Schraubverbindung oder eine Steckverbindung oder eine Rastverbindung vorgesehen sein kann. In entsprechender Weise kann der Lichtschacht und das Trägerelement einstückig ausgebildet sein. Auch hier kann eine Realisierung aus Kunststoff vorgesehen sein. Ebenso kann jedoch auch hier realisiert sein, dass der Lichtschacht und das Trägerteil zerstörungsfrei lösbar ausgebildet sind, wobei im Hinblick auf spezifische Beispiele auf diejenigen verwiesen wird, wie sie zwischen dem Gehäuseteil und dem Lichtschacht realisiert sein können.Provision can be made for the housing part and the light shaft to be designed in one piece. A design made of plastic can be provided. However, the housing part and the light shaft can also be detachably connected in a non-destructive manner be, in this regard, a screw connection or a plug connection or a snap-in connection can be provided. Correspondingly, the light shaft and the carrier element can be designed in one piece. A realization made of plastic can also be provided here. However, it can also be implemented here that the light well and the carrier part are designed to be detachable without being destroyed, with reference being made to those of how they can be implemented between the housing part and the light well with regard to specific examples.

Vorzugsweise ist die Abdeckung zerstörungsfrei lösbar mit dem Gehäuseteil verbunden, wobei hier insbesondere ebenfalls eine Schraubverbindung oder eine Steckverbindung oder eine Rastverbindung vorgesehen sein kann.Preferably, the cover is detachably connected to the housing part in a non-destructive manner, it also being possible for a screw connection or a plug-in connection or a snap-in connection to be provided here in particular.

Das zumindest eine Deckelement, welches vorzugsweise an der Oberseite innerhalb des Gehäuseteils an dem Gehäuseteil angeordnet ist, ist auch in bevorzugter Weise zerstörungsfrei lösbar an dem Gehäuseteil angeordnet. Hier kann ebenfalls eine Steckverbindung als vorteilhafte Ausführung vorgesehen sein.The at least one cover element, which is preferably arranged on the upper side within the housing part on the housing part, is also preferably arranged on the housing part so that it can be detached in a non-destructive manner. A plug-in connection can also be provided here as an advantageous embodiment.

Durch die zumindest eine Anordnung des Deckelements kann eine thermische Trennung zwischen dem Hohlraum in der Anordnung gebildet zwischen der Abdeckung und dem Gehäuseteil von dem Hohlraum im Lichtschacht erreicht werden.The at least one arrangement of the cover element enables a thermal separation between the cavity in the arrangement formed between the cover and the housing part and the cavity in the light well to be achieved.

Bis zur Lichtquelle hin wird somit keine weitere Wärmezuführung erreicht, sodass die thermische Anstrahlung der Lichtquelle minimiert werden kann.Up to the light source, no further supply of heat is thus achieved, so that the thermal irradiation of the light source can be minimized.

Das Deckelement kann aus einem Glasmaterial sein und kann klar, milchig oder als Streulinse ausgeführt sein. Dieses Deckelement kann neben einer einfachen Einbringung in Form eines Einsteckens oder Einklemmens auch in das Gehäuseteil eingeklebt sein. Der Lichtschacht kann auch mehrstufig ausgebildet sein, wobei in diesem Zusammenhang mehrere Deckelemente angeordnet sind. Durch diese mehreren Deckelemente kann dann eine nochmalig verbesserte thermische Entkopplung der Lichtquelle erreicht werden, da zusätzliche Hohlräume gebildet werden, durch welche eine Wärmepufferung erzielt werden kann.The cover element can be made of a glass material and can be clear, opaque or embodied as a diffuser lens. This cover element can also be glued into the housing part in addition to a simple insertion in the form of an insertion or clamping. The light well can also be designed in multiple stages, with several cover elements being arranged in this connection. A further improved thermal decoupling of the light source can then be achieved by these several cover elements, since additional cavities are formed, through which heat buffering can be achieved.

Vorzugsweise ist vorgesehen, dass ein optisches Element am Eingang des Lichtkanals angeordnet ist, wobei das optische Element beispielsweise eine Sammellinse sein kann. Dadurch kann das Licht der zumindest einen Lichtquelle gebündelt werden und damit mit möglichst geringen Verlusten bis hin zur Abdeckung und aus der Abdeckung heraus gestrahlt werden. Es kann auch vorgesehen sein, dass anstatt einer Linse für alle Lichtquellen jede Lichtquelle eine zugeordnete Linse aufweist. Dies kann beispielsweise bei einer Ausgestaltung der Lampe mit mehreren Leuchtdioden vorgesehen sein. Das gebündelte Licht kann dann durch das letzte, von der Lichtquelle am weitesten entfernte Deckelement oder durch die Abdeckung wieder aufgestreut werden, um eine möglichst gleichmäßige Beleuchtung des mit der Lampe zu beleuchtenden Raums erreichen zu können. Vorzugsweise wird dieses Deckelement und/oder die Abdeckung dazu als milchig eingetrübte Scheibe oder als Streulinse ausgeführt.Provision is preferably made for an optical element to be arranged at the entrance of the light channel, it being possible for the optical element to be a converging lens, for example. As a result, the light from the at least one light source can be bundled and thus radiated up to the cover and out of the cover with the lowest possible losses. It can also be provided that instead of a lens for all light sources, each light source has an associated lens. This can be provided, for example, in an embodiment of the lamp with a plurality of light-emitting diodes. The bundled light can then be scattered again through the last cover element furthest away from the light source or through the cover in order to be able to achieve the most uniform possible illumination of the room to be illuminated with the lamp. Preferably, this cover element and/or the cover is designed as a milky, cloudy disk or as a diffuser lens.

Auf dem Schaltungsträger, auf dem vorzugsweise die Lichtquelle, insbesondere die LEDs angeordnet sind, kann auch ein Temperatursensor angeordnet sein, der bei zu hoher Temperatur die Leuchtdioden abschaltet oder herunterregelt, um diese vor Beschädigung zu schützen. Der Schaltungsträger, welcher aus bekannten Materialien oder aus Keramik sein kann, ist vorzugsweise mit einem wärmeleitenden Klebstoff auf den Kühlkörper, welcher vorzugsweise aus Aluminium ist, geklebt. Der Schaltungsträger und der Kühlkörper können auch einstückig aus Keramik ausgeführt sein. Der Kühlkörper kann thermisch mit einem Außengehäuse des Hausgeräts gekoppelt werden, um die Kühlfläche zu vergrößern.On the circuit carrier, on which the light source, in particular the LEDs, is preferably arranged, a temperature sensor can also be arranged, which switches off the light-emitting diodes or regulates them down if the temperature is too high, in order to protect them from damage. The circuit carrier, which can be made of known materials or ceramics, is preferably glued to the heat sink, which is preferably made of aluminum, with a heat-conducting adhesive. The circuit carrier and the heat sink can also be designed in one piece from ceramic. The heat sink can be thermally coupled to an outer housing of the domestic appliance in order to increase the cooling surface.

Vorzugsweise sind das oder die Deckelemente aus einem nicht oder schlecht wärmeleitenden Material ausgebildet. Beispielsweise kann Glas vorgesehen sein.The cover element or elements are preferably made of a material that is not thermally conductive or has poor thermal conductivity. For example, glass can be provided.

Gerade dann, wenn eine oder mehrere Leuchtdioden als Lichtquelle beziehungsweise Lichtquellen verwendet werden, kann gegenüber einer Lampe mit konventionellem Glühdrahtleuchtmittel ein deutlich energieeffizienterer Betrieb ermöglicht werden. Aufgrund der geringeren Größe der Leuchtdioden kann dann auch die Öffnung in der Decke des Aufnahmeraums kleiner gestaltet werden als bei konventionellen Glühdrahtleuchtmitteln. Dadurch werden die Wärmeverluste durch die kleinere, nicht isolierte Stelle verringert. Dies führt zu einem geringeren Energieverbrauch des Gesamtgeräts beim Zubereiten von Lebensmitteln. Durch die Verwendung von Leuchtdioden kann darüber hinaus die Farbtemperatur des Lichts nahezu frei gewählt werden. Dies ermöglicht auch eine Beleuchtung, die dem Beobachter ähnlicher dem üblichen Tageslicht erscheint als dies bei herkömmlichen Leuchtmitteln der Fall ist.It is precisely when one or more light-emitting diodes are used as the light source or light sources that a significantly more energy-efficient operation can be made possible compared to a lamp with a conventional glow-wire illuminant. Due to the smaller size of the light-emitting diodes, the opening in the ceiling of the recording room can then also be made smaller than in the case of conventional glow-wire lamps. This reduces heat loss through the smaller, non-insulated spot. This leads to lower energy consumption of the entire device when preparing food. By the use of LEDs, the color temperature of the light can also be chosen almost freely. This also enables lighting that appears more similar to normal daylight to the observer than is the case with conventional light sources.

Weitere Merkmale der Erfindung ergeben sich aus den Ansprüchen, den Figuren und der Figurenbeschreibung.Further features of the invention result from the claims, the figures and the description of the figures.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand schematischer Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine schematische perspektivische Darstellung eines erfindungsgemäßen Hausgeräts;
Fig. 2
eine schematische Schnittdarstellung der Lampe im Hausgerät gemäß Fig. 1;
Fig. 3
eine Seitenansicht eines Ausführungsbeispiels einer erfindungsgemäßen Lampe; und
Fig. 4
eine perspektivische Schnittdarstellung der Lampe gemäß Fig. 3.
An embodiment of the invention is explained in more detail below with reference to schematic drawings. Show it:
1
a schematic perspective view of a household appliance according to the invention;
2
according to a schematic sectional view of the lamp in the household appliance 1 ;
3
a side view of an embodiment of a lamp according to the invention; and
4
a perspective sectional view of the lamp according to FIG 3 .

In den Figuren werden gleiche oder funktionsgleiche Elemente mit den gleichen Bezugszeichen versehen.Elements that are the same or have the same function are provided with the same reference symbols in the figures.

In Fig. 1 ist in einer perspektivischen Darstellung ein Hausgerät zum Zubereiten von Lebensmitteln gezeigt, welches als Backofen 1 ausgebildet ist. Der Backofen 1 umfasst einen als Garraum 2 ausgebildeten Aufnahmeraum, in den Lebensmittel zum Zubereiten eingebracht werden können. Der Garraum 2 ist durch eine Muffel 3 beziehungsweise deren Wände begrenzt, wobei eine frontseitige Öffnung ausgebildet ist, die durch eine Tür 4 verschließbar ist. In einer Decke 5 der Muffel 3 ist zumindest eine Lampe 6 ausgebildet. Sowohl die Anzahl als auch die Position der Lampe 6 sind lediglich beispielhaft.In 1 is a perspective view of a domestic appliance for preparing food, which is designed as a baking oven 1. The oven 1 comprises a receiving space designed as a cooking chamber 2 into which foodstuffs can be placed for preparation. The cooking chamber 2 is delimited by a muffle 3 or its walls, with a front opening being formed through a door 4 can be closed. At least one lamp 6 is formed in a cover 5 of the muffle 3 . Both the number and the position of the lamp 6 are merely exemplary.

Mit der Lampe 6 wird der Garraum 2 im Betrieb des Backofens 1 ausgeleuchtet. Nicht gezeigte Einrichtungen zur Erzeugung von Wärme, beispielsweise Heizkörper, erzeugen Wärme im Garraum 2, durch welche das Lebensmittel gegart werden kann. Diese Wärme wirkt auch auf die Lampe 6 ein, wobei aufgrund der Ausgestaltung der Lampe 6 eine Temperaturbeaufschlagung in unerwünschter Weise der Lichtquelle der Lampe 6 vermieden werden kann.The cooking chamber 2 is illuminated with the lamp 6 when the oven 1 is in operation. Not shown devices for generating heat, such as radiators, generate heat in the cooking chamber 2, through which the food can be cooked. This heat also acts on the lamp 6, with the design of the lamp 6 making it possible to prevent the light source of the lamp 6 from being subjected to heat in an undesirable manner.

In Fig. 2 ist in einer schematischen Darstellung eine Schnittansicht eines Ausführungsbeispiels der Lampe 6 gemäß ihrer Anordnung in der Decke 5 gezeigt. Die Lampe 6 erstreckt sich bereichsweise in den Garraum 2 hinein. Außerhalb des Garraums 2 ist an der Decke 5 ein Isolationsmaterial 7 angebracht. In dem Isolationsmaterial 7 und der Decke 5 ist eine Öffnung 8 ausgebildet, durch welche sich die Lampe 6 erstreckt und beidseits der Decke 5 ausgebildet ist.In 2 1 is a schematic representation of a sectional view of an exemplary embodiment of the lamp 6 according to its arrangement in the ceiling 5. The lamp 6 extends into the cooking chamber 2 in certain areas. An insulating material 7 is attached to the ceiling 5 outside of the cooking chamber 2 . In the insulating material 7 and the ceiling 5 there is an opening 8 through which the lamp 6 extends and is formed on both sides of the ceiling 5 .

Die Lampe 6 umfasst eine frontseitige lichtdurchlässige Abdeckung 9, welche beispielsweise aus Glas ausgebildet ist. Die Abdeckung 9 erstreckt sich in den Garraum 2. Die Lampe 6 umfasst darüber hinaus ein Gehäuseteil 10, welches beispielsweise aus Kunststoff einstückig ausgebildet ist. Die Abdeckung 9 ist in das Gehäuseteil 10 eingeschraubt. Das Gehäuseteil 10 ist mit der Decke 5 so verbunden, dass die Öffnung 8 gasdicht und auch feuchtigkeitsdicht abgedichtet ist. Dazu kann ein separates Dichtelement vorgesehen sein.The lamp 6 comprises a light-transmitting cover 9 on the front side, which is made of glass, for example. The cover 9 extends into the cooking chamber 2. The lamp 6 also includes a housing part 10, which is formed in one piece from plastic, for example. The cover 9 is screwed into the housing part 10 . The housing part 10 is connected to the cover 5 in such a way that the opening 8 is sealed gas-tight and also moisture-tight. A separate sealing element can be provided for this purpose.

Die Abdeckung 9 ist an einem unteren Ende 12 des Gehäuseteils 10 mit diesem verschraubt, wobei dazu im Ausführungsbeispiel eine Schraubverbindung 11 vorgesehen ist. Die Abdeckung 9 kann somit zerstörungsfrei von dem Gehäuseteil 10 gelöst werden.The cover 9 is screwed to the housing part 10 at a lower end 12 thereof, a screw connection 11 being provided for this purpose in the exemplary embodiment. The cover 9 can thus be detached from the housing part 10 without being destroyed.

Durch das Gehäuseteil 10 und die Abdeckung 9 ist ein Hohlraum 13 gebildet.A cavity 13 is formed by the housing part 10 and the cover 9 .

Das Gehäuseteil 10 weist an seinem oberen Ende 14 und somit an dem der Abdeckung 9 abgewandten Ende 14 eine Öffnung auf, welche durch ein erstes lichtdurchlässiges Deckelement 16 abgedeckt ist. Das Deckelement 16 ist an der Innenseite des Gehäuseteils 10 befestigt, wobei dazu beispielsweise eine Einklemmung oder ein Einstecken oder auch ein Einkleben vorgesehen sein kann. Die Abdeckung 9 und das Deckelement 16 sind an gegenüberliegenden Seiten 12 und 14 des Gehäuseteils 10 angeordnet, jedoch in Richtung der Längsachse der Lampe, welche im Ausführungsbeispiel gleich der Hauptabstrahlrichtung H zumindest einer mittig positionierten Lichtquelle 23 ist, in Reihe zueinander angeordnet. Mittels dem Deckelement 16 wird die Öffnung 15 abgedeckt, sodass der Hohlraum 13 über die Öffnung 15 verschlossen ist. Das Deckelelement 16 ist aus einem lichtdurchlässigen Material, insbesondere aus Glas ausgebildet, sodass neben der Lichtdurchlässigkeit auch eine thermische Entkopplung der Lichtquelle 23 erreicht werden kann, wobei dazu das Deckelement 16 entsprechend beschichtet ist oder eine entsprechende Materialkomponente aufweist.The housing part 10 has at its upper end 14 and thus at the end 14 facing away from the cover 9 an opening which is covered by a first transparent cover element 16 . The cover element 16 is on the inside of the Housing part 10 attached, for example, a pinch or an insertion or a gluing can be provided. The cover 9 and the cover element 16 are arranged on opposite sides 12 and 14 of the housing part 10, but arranged in series with one another in the direction of the longitudinal axis of the lamp, which in the exemplary embodiment is the same as the main emission direction H of at least one centrally positioned light source 23. The opening 15 is covered by the cover element 16 so that the cavity 13 is closed via the opening 15 . The cover element 16 is made of a translucent material, in particular glass, so that in addition to transparency, thermal decoupling of the light source 23 can also be achieved, with the cover element 16 being coated accordingly or having a corresponding material component.

Das Gehäuseteil 10 ist zum oberen Ende 14 hin verjüngt ausgebildet, wobei an dieser Verjüngung und der damit erzeugten schrägen Außenwand Lüftungsöffnungen 17 und 18 ausgebildet sind. Die Anzahl der Lüftungsöffnungen 17 und 18 ist lediglich beispielhaft, es können auch mehrere derartige Lüftungsöffnungen vorgesehen sein, welche nicht näher gekennzeichnet sind.The housing part 10 tapers towards the upper end 14, ventilation openings 17 and 18 being formed on this taper and on the oblique outer wall produced thereby. The number of ventilation openings 17 and 18 is only an example; several ventilation openings of this type can also be provided, which are not identified in any more detail.

Über diese Lüftungsöffnungen 17 und 18 kann die in dem Hohlraum 13 beim Betrieb des Backofens 1 erzeugte Wärme W gemäß der Pfeildarstellung abgeführt werden. Unmittelbar an das obere Ende 14 anschließend ist ein Lichtschacht 19 ausgebildet, welcher zur Lichtführung des Lichts L der Lichtquelle 23 einerseits und zur weiteren Distanzerzeugung zwischen der Lichtquelle 23 und dem Garraum 2 beiträgt. Der Lichtschacht 19 weist eine Innenseite 20 auf, welche zumindest bereichsweise aus einem hoch lichtreflektierenden Material ausgebildet ist. Darüber hinaus ist der Lichtschacht 19 koaxial zur Längsachse der Lampe 6 ausgebildet. Der Lichtschacht 19 ist geradlinig konzipiert, sodass das Licht L der Lichtquelle 23 in Hauptabstrahlrichtung abgestrahlt werden kann und nicht umgelenkt werden muss. An einem dem Gehäuseteil 10 abgewandten oberen Ende 21 des Lichtschachts 19 ist im Ausführungsbeispiel ein weiteres lichtdurchlässiges Deckelement 22 angeordnet. Dies kann auch als optisches Element in Form einer Sammellinse ausgebildet sein. Darüber hinaus kann vorgesehen sein, dass im Lichtschacht 19 zumindest ein weiteres Deckelement und/oder ein optisches Element angeordnet ist, sodas auch im Lichtschacht 19 mehrere separierte Hohlräume kaskadenartig ausgebildet werden. In der gezeigten Ausführung ist lediglich der gesamte Hohlraum 28 gezeigt. Durch diese Hintereinanderausgestaltung von Hohlräumen 13 und 28 kann die thermische Entkopplung der zumindest einen Lichtquelle 23 noch verbessert werden.The heat W generated in the cavity 13 during operation of the baking oven 1 can be dissipated via these ventilation openings 17 and 18 in accordance with the arrow illustration. Directly adjoining the upper end 14 is a light shaft 19 which, on the one hand, contributes to guiding the light L of the light source 23 and to further creating a distance between the light source 23 and the cooking chamber 2 . The light shaft 19 has an inner side 20 which is made of a highly light-reflecting material, at least in some areas. In addition, the light well 19 is coaxial with the longitudinal axis of the lamp 6 . The light shaft 19 is designed in a straight line, so that the light L of the light source 23 can be emitted in the main emission direction and does not have to be deflected. In the exemplary embodiment, a further translucent cover element 22 is arranged on an upper end 21 of the light shaft 19 facing away from the housing part 10 . This can also be designed as an optical element in the form of a converging lens. In addition, it can be provided that at least one further cover element and/or one optical element is arranged in the light shaft 19, so that several are also separated in the light shaft 19 Cavities are formed in a cascade. In the embodiment shown, only the entire cavity 28 is shown. The thermal decoupling of the at least one light source 23 can be further improved by this configuration of cavities 13 and 28 one behind the other.

Die Lichtquelle 23 ist als Leuchtdiode ausgebildet, welche auf einem Schaltungsträger 24 angeordnet ist. Die Lichtquelle 23 ist außerhalb des Lichtschachts 19 ausgebildet und benachbart zum oberen Ende 21 des Lichtschachts 19 positioniert.The light source 23 is in the form of a light-emitting diode, which is arranged on a circuit carrier 24 . The light source 23 is formed outside of the light well 19 and positioned adjacent to the top 21 of the light well 19 .

Die Lichtquelle 23 und der Schaltungsträger 24 sind im Ausführungsbeispiel an einem Kühlkörper 25 befestigt. Dieser Kühlkörper 25 ermöglicht zusätzlich die Wärme der Lichtquelle 23 abzuführen und ist vorzugsweise mit einem nicht gezeigten Gehäuse des Backofens 1 thermisch gekoppelt, sodass eine vergrößerte Ausgestaltung des Kühlkörpers zur Wärmeabfuhr erzeugt werden kann.The light source 23 and the circuit carrier 24 are attached to a heat sink 25 in the exemplary embodiment. This cooling body 25 also enables the heat of the light source 23 to be dissipated and is preferably thermally coupled to a housing (not shown) of the oven 1 so that an enlarged design of the cooling body can be produced for heat dissipation.

Darüber hinaus umfasst die Lampe 6 ein Trägerelement 26, welches in Fig. 2 nicht zu erkennen ist. Das Trägerelement 26 ist mit dem Lichtschacht 19 und dem Kühlkörper 25 verbunden und trägt den Kühlkörper 25 und somit auch den Schaltungsträger 24 und die zumindest eine Lichtquelle 23.In addition, the lamp 6 includes a carrier element 26, which in 2 is not recognizable. The carrier element 26 is connected to the light shaft 19 and the heat sink 25 and carries the heat sink 25 and thus also the circuit carrier 24 and the at least one light source 23.

Das Trägerelement 26 ist einstückig ausgebildet und umfasst Öffnungen, durch welche Kühlluft K seitlich einströmen kann, und auf der anderen Seite wieder ausströmen kann, sodass die Lichtquelle 23 durch den Kühlluftstrom K gekühlt werden kann.The carrier element 26 is designed in one piece and comprises openings through which cooling air K can flow in laterally and out again on the other side, so that the light source 23 can be cooled by the cooling air flow K.

Die Komponenten der Lampe 6 sind im gezeigten Ausführungsbeispiel in Hauptabstrahlrichtung H der mittig positionierten Lichtquelle 23 und somit auch der Längsachse der Lampe 6 in Reihe zueinander positioniert, wobei diesbezüglich zunächst die Lichtquelle 23, dann der Lichtschacht 19, dann das erste Deckelement 16, das Gehäuseteil 10 und die Abdeckung 9 folgen.In the exemplary embodiment shown, the components of the lamp 6 are positioned in series with one another in the main emission direction H of the centrally positioned light source 23 and thus also the longitudinal axis of the lamp 6, with first the light source 23, then the light well 19, then the first cover element 16, the housing part 10 and the cover 9 follow.

Im Garraum 2 treten Temperaturen von beispielsweise 275°C auf, wodurch dadurch auch die Lampe 6 thermisch beaufschlagt wird. Im Hohlraum 13 bildet sich daher Wärme, wobei diese Wärme W über die Lüftungsöffnungen 17, 18 so abgeführt wird, dass die Lampe 23 nicht beeinträchtigt wird.Temperatures of, for example, 275° C. occur in the cooking chamber 2, as a result of which the lamp 6 is also thermally loaded. Heat is therefore generated in the cavity 13, this heat W being dissipated via the ventilation openings 17, 18 in such a way that the lamp 23 is not impaired.

Das Licht L der Lichtquelle 23 wird im Ausführungsbeispiel quasi wesentlich in Hauptabstrahlrichtung H durch den Lichtschacht 19 und das Deckelement 16 und die Abdeckung 9 in den Garraum 2 gestrahlt. Außerhalb des Garraums 2 im Bereich der Lichtquelle 23 treten insbesondere maximal Temperaturen bis ungefähr 70°C auf.In the exemplary embodiment, the light L from the light source 23 is essentially radiated in the main emission direction H through the light well 19 and the cover element 16 and the cover 9 into the cooking chamber 2 . Outside the cooking chamber 2 in the area of the light source 23, maximum temperatures of up to approximately 70° C. occur.

Vorzugsweise wird eine Mehrzahl von Lichtquellen 23 in Form von mehreren Leuchtdioden eingesetzt.A plurality of light sources 23 in the form of a plurality of light-emitting diodes is preferably used.

In Fig. 3 ist eine Seitenansicht der Lampe 6 gezeigt. Bei dieser Ausgestaltung sind die Komponenten von außen zu erkennen, wobei insbesondere die Verbindung zwischen dem Lichtschacht 19 und dem Kühlkörper 25 mittels des Trägerelements 26 zu sehen ist. Das Trägerement 26 weist relativ große Öffnungen 27a auf, durch welche Kühlluft K in Strömungsrichtung senkrecht zum Figurenblatt durch das Trägerelement 26 strömen kann und somit die Mehrzahl von Lichtquellen 23a, 23b und 23c kühlen kann. Darüber hinaus kann auch vorgesehen sein, dass zusätzliche Öffnungen 27b im Trägerelement 26 ausgebildet sind, wodurch ein Kühlluftstrom in der Figurenebene quasi von der anderen Seite die Lichtquellen 23a bis 23c kühlen kann.In 3 a side view of the lamp 6 is shown. In this configuration, the components can be seen from the outside, with the connection between the light shaft 19 and the heat sink 25 by means of the carrier element 26 being particularly visible. The carrier element 26 has relatively large openings 27a, through which cooling air K can flow through the carrier element 26 in the direction of flow perpendicular to the figure sheet and can thus cool the plurality of light sources 23a, 23b and 23c. In addition, provision can also be made for additional openings 27b to be formed in the carrier element 26, as a result of which a cooling air flow in the plane of the figure can cool the light sources 23a to 23c from the other side, as it were.

In Fig. 4 ist eine perspektivische Schnittdarstellung der Lampe 6 gemäß der Darstellung in Fig. 3 gezeigt, wobei die Schnittebene in Fig. 3 in der Figurenebene liegt und die Darstellung in Fig. 4 eine dazu etwas um die Lampenachse gedrehte Darstellung zeigt. Auch hier ist die Struktur des Trägerelements 26 zu erkennen, welches an den Ecken nach oben ragende Säulen aufweist, durch welche das Verbinden mit dem Kühlkörper 25 gegeben ist. Darüber hinaus sitzt der Kühlkörper mit seiner Unterseite auf Trägerstegen des Trägerelements 26 auf. Der Schaltungsträger 24 ist an dieser Unterseite des Kühlkörpers 25 befestigt, wobei diesbezüglich eine Anklebung mit einem wärmeleitfähigen Klebstoff vorgesehen ist.In 4 12 is a sectional perspective view of the lamp 6 as shown in FIG 3 shown, with the cutting plane in 3 lies in the plane of the figure and the representation in 4 shows a representation rotated somewhat about the lamp axis. Here, too, the structure of the carrier element 26 can be seen, which has columns that project upwards at the corners, through which the connection to the heat sink 25 is provided. In addition, the underside of the cooling body rests on the carrier webs of the carrier element 26 . The circuit carrier 24 is fastened to this underside of the heat sink 25, and in this regard bonding with a thermally conductive adhesive is provided.

BezugszeichenlisteReference List

11
Backofenoven
22
Garraumcooking chamber
33
Muffelmuffle
44
Türdoor
55
Decke der Muffelcover of the muffle
66
Lampelamp
77
Isolationsmaterialinsulation material
88th
Öffnungopening
99
Abdeckungcover
1010
Gehäuseteilhousing part
1111
Schraubverbindungscrew connection
1212
unteres Endelower end
1313
Hohlraumcavity
1414
oberes Endetop end
1515
Öffnungopening
1616
Deckelementcover element
17, 1817, 18
Lüftungsöffnungenvents
1919
Lichtschachtlight well
2020
Innenseite des Lichtschachtsinside of the light well
2121
oberes Endetop end
2222
Deckelementcover element
23, 23a, b, c23, 23a, b, c
Lichtquelle(n)light source(s)
2424
Schaltungsträgercircuit carrier
2525
Kühlkörperheatsink
2626
Trägerelementcarrier element
27a, b27a, b
Öffnungenopenings
HH
Strahlengangbeam path
LL
LichtLight
WW
Wärmewarmth

Claims (13)

  1. Lamp (6) for a household appliance (1), which has at least one light source (23), a housing part (10) and a front-side trough-shaped cover (9) that is permeable to light, which is connected to the housing part (10), wherein the at least one light source (23; 23a, 23b, 23c) is arranged on the side (14) of the housing part (10) that is remote from the cover (9), and wherein at least one cover element (16, 22) that is formed from a material that is permeable to light is arranged in the beam path (H) of the at least one light source (23), wherein light (L) of the at least one light source (23; 23a, 23b, 23c) can be emitted from the lamp (6) through the at least one cover element (16, 22) and the cover (9), wherein a first cover element (16) is arranged on the side (14) of the housing part (10) that is facing the at least one light source (23; 23a, 23b, 23c) in order to cover an opening (15) of the housing part (10) on the side (14) of the housing part (10) that is remote from the cover (9), wherein the housing part (10) is designed as tapered towards the side (14), the at least one light source (23; 23a, 23b, 23c) is arranged outside of the housing part (10) and the first cover element (16) is designed in addition to the permeability to light to also achieve a thermal decoupling of the light source and the first cover element (16) is accordingly coated or has a corresponding material component for this purpose, wherein the housing part (10) has ventilation openings (17, 18) through which heat (W) can be dissipated from a hollow space (13) that is formed by the housing part (10) and the cover (9).
  2. Lamp (6) according to claim 1, characterised in that a light shaft (19) is arranged on the side (14) of the housing part (10) that is remote from the cover (9) and the light (L) of the at least one light source (23; 23a, 23b, 23c) can be guided through the light shaft to the cover element (16, 22).
  3. Lamp (6) according to claim 1 and 2, characterised in that the hollow space (28) in the light shaft (19) is separated by the cover element (16, 22) from the hollow space (13) between the housing part (10) and the cover (9).
  4. Lamp (6) according to claim 2 or 3, characterised in that the light shaft (19) is designed as straight and is fastened to the housing part (10).
  5. Lamp (6) according to one of claims 2 to 4, characterised in that the at least one light source (23; 23a, 23b, 23c) is arranged on the end (21) of the light shaft (19) that is remote from the housing part (10).
  6. Lamp (6) according to one of claims 2 to 5, characterised in that a carrier element (26) is arranged on the end (21) of the light shaft (19) that is remote from the housing part (10) and the carrier element supports the at least one light source (23; 23a, 23b, 23c).
  7. Lamp (6) according to claim 6, characterised in that the at least one light source (23; 23a, 23b, 23c) is arranged on a circuit carrier (24) that is held by the carrier element (26).
  8. Lamp (6) according to claim 6 or 7, characterised in that the at least one light source (23; 23a, 23b, 23c) is arranged on a cooling body (25) that is connected to the carrier element (26).
  9. Lamp (6) according to one of claims 6 to 8, characterised in that the carrier element (26) has openings (27a, 27b) through which cooling air (K) can flow so as to cool the at least one light source (23; 23a, 23b, 23c).
  10. Lamp (6) according to one of claims 2 to 9, characterised in that a further cover element (22) that is permeable to light and/or an optical element for deflecting the light beam and/or for bundling or separating a light beam is arranged in the light shaft (19) and/or a light-reflecting coating is formed on the inner side (20) of the light shaft (19).
  11. Lamp (6) according to one of the preceding claims, characterised in that the at least one light source (23; 23a, 23b, 23c) is a light-emitting semiconductor component.
  12. Household appliance (1) having a lamp (6) according to one of the preceding claims.
  13. Household appliance (1) according to claim 12, which has a receiving compartment (2) that can be influenced with heat by a heating facility, wherein the lamp (6) is arranged so as to illuminate the receiving compartment (2) and the cover (9) extends at least in regions into the receiving compartment (2).
EP10160449.4A 2009-04-30 2010-04-20 Lamp for household device and household device, in particular for preparing food, with a lamp Active EP2251588B1 (en)

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DE102009002775A DE102009002775A1 (en) 2009-04-30 2009-04-30 Lamp for household appliance and household appliance, in particular for preparing food, with a lamp

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EP2251588A3 EP2251588A3 (en) 2014-07-09
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WO2013098018A1 (en) * 2011-12-28 2013-07-04 Arcelik Anonim Sirketi An oven
ITTO20120586A1 (en) * 2012-07-02 2014-01-03 Illinois Tool Works LED LIGHTING DEVICE FOR ILLUMINATING THE CAVITY OF AN OVEN
DE102012222030A1 (en) * 2012-12-03 2014-06-18 BSH Bosch und Siemens Hausgeräte GmbH Cooking appliance for use as microwave oven or steam cooker, has cooking chamber for receiving cooking goods, where cooking chamber is limited by wall that has opening
DE102012223679A1 (en) * 2012-12-19 2014-06-26 BSH Bosch und Siemens Hausgeräte GmbH Lighting device for a cooking appliance and cooking appliance
DE102013210823B3 (en) * 2013-06-10 2014-12-11 Irlbacher Blickpunkt Glas Gmbh LED hot room light and this hot room light containing household appliance
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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
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KR102600945B1 (en) * 2017-01-03 2023-11-13 삼성전자주식회사 Cooking appliance
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JP7108820B2 (en) * 2018-04-27 2022-07-29 パナソニックＩｐマネジメント株式会社 heating cooker
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EP2251588A2 (en) 2010-11-17
EP2251588A3 (en) 2014-07-09

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