EP4368896A1 - Lampe pour appareil de cuisson - Google Patents

Lampe pour appareil de cuisson Download PDF

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Publication number
EP4368896A1
EP4368896A1 EP23205588.9A EP23205588A EP4368896A1 EP 4368896 A1 EP4368896 A1 EP 4368896A1 EP 23205588 A EP23205588 A EP 23205588A EP 4368896 A1 EP4368896 A1 EP 4368896A1
Authority
EP
European Patent Office
Prior art keywords
light
cooking appliance
cover glass
sleeve
cooking
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.)
Pending
Application number
EP23205588.9A
Other languages
German (de)
English (en)
Inventor
Philipp Henrici
Olaf Baumeister
Jörg Harnischmacher
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.)
BJB GmbH and Co KG
Original Assignee
BJB GmbH and Co KG
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
Priority claimed from DE202022106278.1U external-priority patent/DE202022106278U1/de
Application filed by BJB GmbH and Co KG filed Critical BJB GmbH and Co KG
Publication of EP4368896A1 publication Critical patent/EP4368896A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/237—Details of housings or cases, i.e. the parts between the light-generating element and the bases; Arrangement of components within housings or cases
    • 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
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/061—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/008—Combination of two or more successive refractors along an optical axis
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V29/80—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with pins or wires
    • 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

  • Typical cooking appliance lights are made from EN 20 2019 106 170 U1 They are used to illuminate the cooking chamber of a cooking appliance, such as an oven, steam cooker or microwave oven. Such lights have to meet high temperature stability requirements. Cooking temperatures of up to 300° are possible in ovens in particular. Ovens capable of pyrolysis heat the cooking chamber to up to 500 °C during the pyrolysis process.
  • cooking fumes are produced when food is being cooked, which usually contain fat and can have a corrosive effect when combined with high temperatures.
  • moisture load caused by cooking fumes This is naturally particularly high in steam cookers, but also occurs to a lesser extent in ovens and microwave ovens.
  • the lamp must be able to withstand such influences or - particularly in the case of steam cookers - be specially sealed.
  • LED lamps also requires special cooling management. Since LED lamps are particularly temperature-sensitive, they must be as far away from the cooking chamber as possible, which must be taken into account when designing and constructing cooking appliance lights.
  • the lighting of the cooking chamber serves, among other things, to enable the user to observe and inspect the cooking process from the outside through the appliance door.
  • the temperature sensitivity of the LED lamps requires - as described in detail - that they be as far away from the cooking chamber wall as possible, so that a comparatively long beam path is created.
  • the light emitted by the LED lamp is regularly fed into the cooking chamber via light guides.
  • this technology has the disadvantage that the light guide is usually an expensive component. In addition, it must be encapsulated when it is routed between the cooking chamber wall and the appliance wall in order to prevent contact with the insulation present there. Contact between the light guide and the insulation would lead to undesirable and detrimental light extraction.
  • the openings for the cooking chamber walls must be regularly adapted to the use of light guides. This requires a great deal of effort in cooking appliance production, as new manufacturing tools must be produced to form the cooking appliance walls.
  • the object of the invention is therefore to create a cooking appliance light which is designed without a light guide between the LED light source and the cooking chamber wall and yet ensures good cooking chamber illumination.
  • the object of the invention is achieved by a cooking appliance light with the features of claim 1, in particular with its characterizing features, according to which the light entry surface of the cover glass is designed as an optically effective surface which influences the light emitted by the lamp in the direction of the cover glass and passing through the cover glass in its direction of emission.
  • the cooking appliance light according to the invention advantageously uses the fixing known from the prior art by means of a metal sleeve which is anchored in a cutout in the cooking chamber wall.
  • the sleeve itself is closed off from the cooking chamber by a cover glass.
  • this is known from the use of cooking appliance lights with conventional light sources, in particular with incandescent filament lamps.
  • the invention then uses the sleeve as a spacer element and holding part for the LED light source.
  • the LED light source is arranged at the end of the sleeve facing away from the cooking chamber wall and is preferably fixed there outside the sleeve. In this way, a cooling air flow can be guided past the LED light source and sufficient heat dissipation can be ensured.
  • the cover glass and in particular its inside, is used to influence the light exiting the cover glass, in particular to scatter the light over a wide area as it exits the cover glass.
  • the LED light source itself is provided with an optic that focuses the light in order to emit the light through the sleeve to the cover glass with as little loss as possible.
  • the optic is usually positioned immediately downstream of the LED light source in the direction of light exit, i.e. close to the LED.
  • the light entry surface of the cover glass i.e. the optically effective surface of the cover glass, is preferably concavely curved and in this way fans out the incoming light rays.
  • the concave curvature of the optically effective surface of the cover glass preferably has its apex in the center of the cover glass, i.e. where the longitudinal center axis of the cooking appliance light passes through the cover glass.
  • the concave surface extends in particular into the area of a mutual contact surface of the sleeve and cover glass.
  • the entire inner surface of the cover glass can be used as an optically effective surface. It goes without saying that any neck section of the cover glass, which can form an external thread for fastening in the sleeve, remains unaffected by this.
  • the light exit surface of the cover glass is preferably directed orthogonally to the longitudinal central axis. It can be flat or structured, whereby structuring of the light exit surface can complement the optically effective inner surface of the cover glass.
  • a cooking appliance lamp according to the invention is provided with the reference number 10.
  • the cooking appliance light is in Figure 1 initially shown in an exploded view. It initially comprises a lighting unit 11, consisting of a circuit board 12 with an LED light source 13 arranged thereon. The light emitted by the LED light source is radiated along a light exit direction X in the direction of a cover glass 14.
  • the circuit board 12 carries connection terminals 15, which serve to connect connecting conductors.
  • the circuit board 12 itself is mounted on a heat sink 16 by means of two fastening elements 17. Downstream of the LED light source 13 in the light exit direction X is an approximately pot-shaped holder 18 for an optic 19 in the form of a converging lens.
  • a holding part 20 is used to hold the circuit board 12, the heat sink 16 and the converging lens 19 and to fix them to a sleeve 21.
  • the holding part 20 has fastening stamps 30, the free ends of which point away from the cover glass 14 and in this case hold the heat sink 16, on which the circuit board 12 with the LED light source 13 is attached.
  • the optics holder 18 with the converging lens 19, however, is inserted into the holding part 20.
  • the holding part 20 is also provided with three ring-disk-like slats 22, which are spaced apart from one another in the light exit direction X and form a ventilation gap between them. The free ring diameter of the slats 22 expands in the light exit direction X.
  • the sleeve 21 has a first end close to the cover glass, which is provided with a support flange 23. Locking wings 25 are notched out of the sleeve wall 24.
  • the second end of the sleeve 21, facing away from the cover glass 14, has tabs 26 projecting in the direction of the holding part 20, each of which has a locking opening 27.
  • the tabs 26 engage in tab receptacles 28 of the holding part 20.
  • Each tab receptacle 28 has a locking projection 29, which reaches through the locking opening 27 of each tab 26.
  • the cover glass 14 has a neck 31 directed towards the sleeve 21.
  • the neck 31 is provided with an external thread 32.
  • the external thread 32 interacts with thread sections 33 of the sleeve 21, which are produced by impressions in the sleeve wall 24. The interaction of the external thread 32 and thread sections 33 allows the cover glass 14 to be easily screwed into the sleeve 21.
  • Figure 4 shows the representation according to Figure 1 in a vertical section.
  • the cutting plane lies along the section line IV-IV in Figure 3 In this respect, Figure 4 that to Figure 1 Said.
  • FIG. 2 shows the cooking appliance light 10 in the assembled state.
  • the cover glass 14 is screwed into the sleeve 21.
  • the holding part 20 here is firmly seated at the second end of the sleeve.
  • the cooling body 16 with the lighting unit 11 - consisting primarily of the circuit board 12 with the LED light source 13 - is in turn fixed to the holding part 20, with the optics holder 18 with the internal collecting lens 19 being arranged between the circuit board 12 and the slat 22 close to the circuit board 12.
  • the cooking appliance light 10 forms a comparatively compact unit.
  • a unit can be produced.
  • the cooking appliance light 10 shown is inserted into the cutout of a cooking chamber wall (not shown).
  • the sleeve 21 extends through the cutout as far as possible until the support flange 23 is positioned on the inside of the cooking chamber wall.
  • the locking wings 25 engage behind the cooking chamber wall and arrange the cooking appliance light 10 firmly and captively on the cooking chamber wall.
  • FIG. 2 one can see in particular that the lamp unit 11 is clearly spaced from the cover glass 14 and thus from the cooking chamber (not shown) by the sleeve 21 - and here also by the holding part 20.
  • the lamp unit 11 and in particular the LED light source 13 is arranged outside the sleeve 21 and thus outside a room with heat build-up.
  • the numerous air gaps between A cooling air flow can be passed through the second end of the sleeve 21 facing away from the cover glass 14 and the LED light source 13, which ensures sufficient heat dissipation, on the one hand from the LED operating heat and, on the other hand, from the heat radiated from the cooking chamber.
  • Figure 5 shows a longitudinal section through the cooking appliance light 10 as shown in Figure 2
  • the cutting plane lies along the section line IV-IV in Figure 3 .
  • Figure 5 allows a view into the interior of the assembled cooking appliance light 10. You can see the Figures 1 and 4 components already described in detail. In this respect, reference is made to the previous drawing description.
  • the light leaves the LED light source 13 in the light exit direction X, i.e. in the direction of the cover glass 14. It first reaches the optics 19, which is designed as a converging lens and focuses the light emitted by the LED light source 13. In this way, the light is prevented from fanning out too widely and the light is guided in the form of a directed and focused light beam in the direction of the cover glass 14.
  • the light first passes through the circular openings of the slats 22 and then the interior of the sleeves 21.
  • the cover glass 14 has an inner light entry surface 34 facing the LED light source, which is designed as an optically effective surface.
  • the light leaves the cover glass 14 through the light exit surface 35 facing outwards, i.e. away from the LED light source 13, which in turn faces the cooking chamber of a cooking appliance.
  • the light entry surface of the cover glass 14 is concave, as seen in the light exit direction X. It has its apex in the center of the cover glass 14. This center point corresponds to the passage of a longitudinal center axis (not shown in more detail) parallel to the sleeve wall through the cover glass.
  • the light entry surface 34 extends outwards into the area of a mutual contact surface of the neck 31 of the cover glass 14 with the sleeve 21. With the exception of a material web required to form the external thread 32, the entire inside of the cover glass 14 is thus designed as a light entry surface 34 or, due to the concave design, as an optically effective surface.
  • the entrance surface 34 is designed to scatter the light from the LED light source 13 that is bundled by the collecting lens 19 for optimal illumination of the cooking chamber.
  • the radius of curvature of the light entrance surface 34 is adapted to the conditions of the cooking chamber. Depending on the arrangement of the cooking appliance light in the cooking chamber, a suitable curvature is selected in order to scatter the light as optimally as possible for illumination.
  • the light entrance surface 34 therefore forms an optical lens surface.
  • the exit surface 35 is directed orthogonally to the longitudinal center axis of the sleeve 21 and can be structured for additional diffuser effects.
  • the invention shows how a compact cooking appliance light 10 can be designed without the use of complex light-guiding elements, without having to make compromises in terms of heat dissipation to protect the LED light source 13.
  • the arrangement of the lamp unit 11, which is spaced from the cover glass by the sleeve 21 and located outside the sleeve 21, is essential.

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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)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Electric Stoves And Ranges (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP23205588.9A 2022-11-09 2023-10-24 Lampe pour appareil de cuisson Pending EP4368896A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202022106278.1U DE202022106278U1 (de) 2022-11-09 2022-11-09 Gargeräteleuchte für Gargeräte mit Mikrowellengarfunktion
DE102023108263.9A DE102023108263A1 (de) 2022-11-09 2023-03-31 Gargeräteleuchte

Publications (1)

Publication Number Publication Date
EP4368896A1 true EP4368896A1 (fr) 2024-05-15

Family

ID=88510916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23205588.9A Pending EP4368896A1 (fr) 2022-11-09 2023-10-24 Lampe pour appareil de cuisson

Country Status (2)

Country Link
US (1) US20240151403A1 (fr)
EP (1) EP4368896A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251588A2 (fr) * 2009-04-30 2010-11-17 BSH Bosch und Siemens Hausgeräte GmbH Lampe pour appareil ménager et appareil ménager, notamment pour la préparation d'aliments, doté d'une lampe
DE102016113617A1 (de) * 2016-07-25 2018-01-25 Vossloh-Schwabe Italia S.P.A. Ofenleuchte
WO2018018743A1 (fr) * 2016-07-29 2018-02-01 深圳和而泰智能控制股份有限公司 Lampe à del, four et four à micro-ondes
EP2597365B1 (fr) * 2011-11-23 2019-06-12 BSH Hausgeräte GmbH Module d'éclairage pour appareil ménager
DE202019106170U1 (de) 2019-11-06 2019-11-22 Bjb Gmbh & Co. Kg Schwenkbare Beleuchtungseinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251588A2 (fr) * 2009-04-30 2010-11-17 BSH Bosch und Siemens Hausgeräte GmbH Lampe pour appareil ménager et appareil ménager, notamment pour la préparation d'aliments, doté d'une lampe
EP2597365B1 (fr) * 2011-11-23 2019-06-12 BSH Hausgeräte GmbH Module d'éclairage pour appareil ménager
DE102016113617A1 (de) * 2016-07-25 2018-01-25 Vossloh-Schwabe Italia S.P.A. Ofenleuchte
WO2018018743A1 (fr) * 2016-07-29 2018-02-01 深圳和而泰智能控制股份有限公司 Lampe à del, four et four à micro-ondes
DE202019106170U1 (de) 2019-11-06 2019-11-22 Bjb Gmbh & Co. Kg Schwenkbare Beleuchtungseinrichtung

Also Published As

Publication number Publication date
US20240151403A1 (en) 2024-05-09

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