EP4067750A1 - Intelligente lebensmittelzubereitungsvorrichtung mit beleuchtung - Google Patents

Intelligente lebensmittelzubereitungsvorrichtung mit beleuchtung Download PDF

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Publication number
EP4067750A1
EP4067750A1 EP21182974.2A EP21182974A EP4067750A1 EP 4067750 A1 EP4067750 A1 EP 4067750A1 EP 21182974 A EP21182974 A EP 21182974A EP 4067750 A1 EP4067750 A1 EP 4067750A1
Authority
EP
European Patent Office
Prior art keywords
food
food preparation
preparation apparatus
transmissive body
light
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.)
Withdrawn
Application number
EP21182974.2A
Other languages
English (en)
French (fr)
Inventor
Ming Li
Weimin Xiao
Zhongchi LUO
Xiao Yun KUI
Wei Shun BAO
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Publication of EP4067750A1 publication Critical patent/EP4067750A1/de
Withdrawn legal-status Critical Current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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/085—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on baking ovens
    • 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

Definitions

  • the present invention relates to a food preparation apparatus comprising a food preparation chamber having a food support area for supporting food to be prepared and a light transmissive body providing a view of said food support area, the food preparation apparatus further comprising a lighting arrangement comprising at least one light source arranged to illuminate said food support area.
  • such a food preparation apparatus may comprise a light transmissive body through which the food within the food preparation apparatus can be observed, such that an image can be taken of the food within the food preparation apparatus with a camera that either forms an integral part of the food preparation apparatus or forms part of an external device such as a smart phone or tablet held by a user in alignment with the light transmissive body, thereby capturing the image of the food within the food preparation apparatus through the light transmissive body.
  • This image may be processed using image recognition algorithms that may run on a processor of the smart phone or tablet or within the food preparation apparatus in order to recognize the ingredients of the food within the food preparation apparatus, which recognized ingredients may be used to control a controller of a heating element of the food preparation apparatus, for example by selection of a food preparation mode or program based on the recognized ingredients such as to automate the appropriate preparation of the food within the food preparation apparatus without requiring a user to select the appropriate forms preparation program.
  • the camera may be used to monitor progress of the food preparation operation within the food preparation apparatus to facilitate automatic termination of the food preparation program once it is observed with the camera that the food preparation is done. Other potential uses of such image feedback will be apparent.
  • US 10 440 245 B1 discloses a door assembly for providing selective access to a cooking chamber of an oven appliance including an inner glass assembly and an outer glass assembly spaced apart by an outer air gap.
  • a mounting bracket is positioned within the outer air gap and a camera is mounted to the mounting bracket.
  • the door assembly further includes a primary light shield, which may be an extension of the mounting bracket or a non-reflective coating on the outer glass assembly, which blocks reflected light from reaching the camera.
  • the inner glass assembly may include an inner glass pane and a middle glass pane separated by an inner air gap, and a secondary light shield may be positioned within the inner air gap to block more reflected light.
  • a secondary light shield may be positioned within the inner air gap to block more reflected light.
  • the present invention seeks to provide a food preparation apparatus having a lighting arrangement for illuminating the food support area in such a manner that a camera external to the food preparation chamber is protected from glare originating from the lighting arrangement.
  • a food preparation apparatus comprising a food preparation chamber having a food support area for supporting food to be prepared and a light transmissive body providing a view of said food support area, the food preparation apparatus further comprising a lighting arrangement comprising at least one light source arranged to illuminate said food support area and a baffle arranged proximal to the at least one light source arranged to prevent light generated by the at least one light source from exiting the food preparation apparatus through certain regions of the light transmissive body such as to prevent interference of said light with a camera when said camera is positioned relative to said light transmissive body in order to capture an image of the food on said food support area through said light transmissive body.
  • baffle ensures that light produced by the at least one light source cannot directly or indirectly, e.g. through reflections from the light transmissive body, reach certain regions outside the food preparation chamber where a camera may be positioned, e.g. a camera integral to the food preparation apparatus or a camera forming part of a smart device such as a smart phone or tablet computer, such that when the camera is present is such regions, its lens is protected from experiencing glare from the at least one light source by the baffle.
  • a camera may be positioned, e.g. a camera integral to the food preparation apparatus or a camera forming part of a smart device such as a smart phone or tablet computer, such that when the camera is present is such regions, its lens is protected from experiencing glare from the at least one light source by the baffle.
  • the light transmissive body may be a cover, e.g. to cover a camera integral to food preparation apparatus, or may be a lid or a door providing (visual) access to the food preparation chamber such that a camera can capture an image of the food within the food preparation chamber through the cover, lid or door.
  • the lighting arrangement is arranged within the food preparation chamber in between the light transmissive body and the food support area or between a sidewall of the food preparation chamber and the light transmissive body opposing said sidewall.
  • the baffle may comprise a planar portion extending away from the sidewall or a ceiling of the food preparation chamber beyond the at least one light source, said planar portion being located in between the at least one light source and the light transmissive body such as to prevent direct illumination of certain regions of the light transmissive body by the at least one light source.
  • the baffle may further comprise a further planar portion extending from an end portion of the planar portion distal to said sidewall or ceiling towards the food support area to further limit the exposure of the light transmissive body to light produced by the at least one light source.
  • the light transmissive body comprises a cavity delimited by opposing transparent surfaces including an inner surface and an outer surface opposing the inner surface, and wherein the lighting arrangement is located within said cavity. This for instance is beneficial to protect the lighting arrangement from thermal stress during preparation of the food in the food preparation chamber, and may improve the homogeneity of the illumination of the food support area.
  • the baffle may comprise a planar portion extending away from a side of the light transmissive body beyond the at least one light source, said planar portion being located in between the at least one light source and the outer surface of the light transmissive body; and a further planar portion extending from an end portion of the planar portion distal to said side towards the inner surface of the light transmissive body such as to limit the regions of the inner surface being exposed to light produced by the at least one light source, which consequently limits the range of directions in which such light is reflected towards the outer surface by the inner surface, thus reducing reflective glare.
  • the at least one light source comprises an annular array of light sources arranged proximally to a sidewall or an outer perimeter of a ceiling of the food processing chamber, as this achieves a particularly homogeneous illumination of the food support area, thereby facilitating suitable conditions for the capture of a high-quality image of the food in the food support area.
  • the at least one light source comprises a plurality of LEDs as such light sources are mechanically robust, have a long operational lifetime and are highly energy-efficient.
  • the baffle may form a housing in which the at least one light source is housed, said housing having a U-shaped cross-sectional profile.
  • a lighting arrangement can be mounted within the food preparation apparatus in a straightforward manner, and offers high control over the light distribution produced by the at least one light source.
  • the food preparation apparatus further comprises said camera, wherein the camera is arranged to capture an image of the food on said food support area in its field of view through the light transmissive body, thereby providing a self-contained smart food preparation apparatus.
  • the lighting arrangement is located outside said field of view such as to offer an unobscured view of the food support area to the camera, which improves the image quality of the food image captured with the camera, thus increasing the likelihood that the food in this image is correctly recognized.
  • the food preparation apparatus may further comprise a heating element under control of a controller and a communication interface communicatively coupled to the controller, wherein the controller is arranged to configure a food preparation program based on food recognition information received by the communication interface from a processor having recognized said food by processing an image of said food captured by said camera.
  • configuring the food preparation program is also intended to cover selection of the food preparation program, as well as adjusting a template food preparation program based on ingredient information provided by the processor. This consequently yields a food preparation apparatus that may be configured based on information about the actual food within the food preparation chamber derived from an image capturing the actual food.
  • the food preparation apparatus further comprises said processor.
  • the food preparation apparatus may take any suitable shape or form.
  • the food preparation apparatus may be one of an oven, a microwave oven, a steamer or a fryer.
  • FIG. 1 schematically depicts a food preparation apparatus 10 according to an embodiment of the present invention.
  • the food preparation apparatus 10 comprises a food preparation chamber 20 covered by a light transmissive body 30 through which a camera 100 can capture an image of food 1 in a food support area 22 within the food preparation chamber 20.
  • the food support area 22 may be the floor of the food preparation chamber 20 or may be a support body supported by or suspended over the floor of the food preparation chamber 20.
  • the food support area 22 may take any suitable form or shape, e.g. a plate, rack or the like.
  • the light transmissive body 30 takes the form of a double-walled lid having an inner surface 32 and an outer surface 34 delimiting a cavity 36, e.g. to provide heat insulation for protecting the lid from overheating.
  • a double-walled lid is by way of non-limiting example only, and that such as lid may take any suitable shape or form, e.g. a single-walled lid.
  • a lighting arrangement comprising at least one light source 40 and a baffle 50 is arranged on a sidewall 24 of the food preparation chamber 20.
  • the baffle 50 typically comprises a portion 52 extending from the sidewall 24 and arranged in between the light source 40 and the light transparent body 30 such that light produced by the light source 40 is shielded by the baffle 50 from illuminating certain regions of the light transparent body 30 such as to create a glare-free zone outside the food preparation chamber 20 from which the camera 100 may capture a high-quality image of the food 1 in the food support area 22. This is schematically depicted in FIG.
  • the baffle 50 is dimensioned such that it prevents light rays 42 produced by the light source 40 from directly illuminating the lens of the camera 100 when the camera is correctly positioned relative to the food preparation chamber 20.
  • the baffle 50 preferably is light absorbent, e.g. made of a light absorbent material or carrying a light absorbent layer facing the light source 40 although in alternative embodiments the baffle 50 may be a reflector.
  • the lighting arrangement including the at least one light source 40 and the baffle 50 preferably is located outside the field of view 110 of the camera 100 such as not to obscure the food support area 22 within the food preparation chamber 20 from the view of the camera 100.
  • the food preparation apparatus 10 may receive food recognition information from the camera 100 in any suitable manner.
  • the food preparation apparatus may comprise a communication interface 12, e.g. a Bluetooth or Wi-Fi radio, for establishing a communication link with the external device over which image information may be communicated from the external device to the food preparation apparatus 10.
  • image information comprises raw image data
  • the food preparation apparatus 10 may further comprise a processor 14 in communication with the communication interface 12, which processor 14 may be adapted to deploy one or more image recognition algorithms to identify the food 1 captured in the raw image data, e.g. in case the camera 100 forms an integral part of the food preparation apparatus 10.
  • the thus obtained food information may be used to configure a controller 16 adapted to control a heating element 18 for heating the food 1 within the food preparation chamber 20.
  • a food preparation program may be selected or configured based on the recognized food ingredients, or a food preparation program may be controlled based on images captured of the food 1 with the camera 100 during the food preparation process such as to monitor changes to the food 1 in order to assess when the food 1 is done such that the controller 16 can terminate the food preparation program at the optimal point in time.
  • a food preparation program may be selected or configured based on the recognized food ingredients, or a food preparation program may be controlled based on images captured of the food 1 with the camera 100 during the food preparation process such as to monitor changes to the food 1 in order to assess when the food 1 is done such that the controller 16 can terminate the food preparation program at the optimal point in time.
  • images captured of the food 1 with the camera 100 during the food preparation process such as to monitor changes to the food 1 in order to assess when the food 1 is done such that the controller 16 can terminate the food preparation program at the optimal point
  • the communication interface 12 may simply take the shape of a communicative coupling between the image sensor of the camera 100 and the processor 14.
  • the heating element 18 may take any suitable shape or form, e.g. a resistive heating element, a steam heating source, a microwave radiation generator and so on. It will furthermore be understood that although the processor 14 and controller 16 are shown as separate entities, it is equally feasible for processor 14 and the controller 16 to be implemented as a single device performing multiple functions.
  • the at least one light source 40 is formed of multiple LEDs. This has a number of advantages. Firstly, LEDs are robust, have a long operational lifetime and are energy-efficient.
  • LEDs tend to produce a luminous distribution with a spread angle of about 180° from their light emitting surfaces compared to a 360° luminous distribution of incandescent light sources, such that when such LED light emitting surfaces are facing the food support area 22, the generation of light rays 42 towards the camera 100 is already significantly reduced compared to incandescent light sources 40.
  • the generation of some light rays 42 is still likely to occur even when using LEDs as the at least one light source 40, e.g. because of reflections generated by a light transmissive medium covering the light emitting surface of such LEDs, e.g. a phosphor layer, LED package layer and so on.
  • the at least one light source 40 may be a single light source, in a preferred embodiment schematically depicted in FIG. 2 , the at least one light source 40 comprises an array of light sources 40 along the perimeter of the food preparation chamber 20 proximal to the light transmissive body 30 in order to provide more homogeneous illumination of the food 1 in the food support area 22 such as to facilitate the capturing of a high quality image of the food 1 in this area with the camera 100.
  • the array of light sources 40 may be an annular array of light sources 40.
  • the baffle 50 may comprise an annular portion 52 extending from the sidewall 24 of the food preparation chamber 20 and arranged in between the annular array of light sources 40 and the light transmissive body 30 to prevent direct illumination of the lens of the camera 100 by light rays 42 exiting the food preparation chamber 30 through the light transmissive body 30.
  • the baffle 50 may have an L-shaped profile in a cross-sectional view in which case the baffle 50 comprises a planar portion 52 extending from the sidewall 24 of the food preparation chamber 20 beyond the at least one light source 40 in between the at least one light source and the light transmissive body 30 and a further planar portion 54 extending from an end portion of the planar portion 52 distal to the sidewall 24 towards the food support area 22, thus further shielding the at least one light source 40 and preventing light rays 42 from exiting the food preparation chamber 20 through the light transmissive body 30.
  • this embodiment of the baffle 50 may be deployed with any suitable arrangement of light sources 40, e.g. a single light source 40 or an array of light sources 40.
  • the baffle 50 may form a housing of the at least one light source 40 having a U-shaped profile in a cross-sectional view.
  • the optical performance of the baffle 50 in FIG. 3 and FIG. 4 is comparable, in particular if the sidewall 24 is light-absorbent, in FIG. 4 the baffle may be more easily mounted relative to the food support area 22, as the baffle 50 may be mounted on the sidewall 24 as well as on or adjacent to the light transmissive body 30, e.g. on a ceiling of the food preparation chamber 20.
  • FIG. 5 schematically depicts an alternative embodiment in which the lighting arrangement is integrated within the light transmissive body 30, e.g. a double-layered lid on the food preparation chamber 20, in which case the baffle 50 comprises a planar portion 52 extending away from a side of the light transmissive body 30 beyond the at least one light source 40.
  • the planar portion 52 is located in between the at least one light source 40 and the outer surface 34 of the light transmissive body 30.
  • the baffle 50 further comprises a further planar portion 54 extending from an end portion of the planar portion 52 distal to said side towards the inner surface 32 of the light transmissive body 30.
  • the planar portion 52 of the baffle 50 prevents direct illumination of the lens of the camera 100 by the at least one light source 40 when the camera 100 is positioned outside the food preparation chamber 20 such as to capture an image of the food support area 22, whereas the further planar portion 54 restricts illumination of the inner surface 32 of the light transmissive body 30 such that those regions of the inner surface 32 that would reflect light rays 42 towards the lens of the camera 100 are shielded from illumination by the at least one light source 40 by the further portion 52 of the baffle 50.
  • the light source 40 is shown as a single light source, it is equally feasible for an array of light sources 40 to be integrated within the light transmissive body 30, with the baffle 50 arranged to shield the array of light sources 40 from causing glare on the lens of the camera 100 when the camera 100 is in certain positions of the light transmissive body 30.
  • the baffle 50 may take any suitable shape or form, such as the U-shape profile shown in FIG. 4 .
  • the light transmissive body 30 was shown as a lid on top of the food preparation chamber 20 through which access to the food preparation chamber 20 might be provided.
  • FIG. 6 schematically depicts an alternative embodiment in which the light transmissive body 30 takes to shape of a door providing access to the food preparation chamber 20, in which case a camera 100 may be arranged to capture an image of the food 1 at the food support area 22 through the door of the food preparation apparatus 10.
  • the lighting arrangement may be arranged proximal to a ceiling 26 of the food preparation apparatus 20, with the baffle 50 extending from the ceiling 26 beyond the at least one light source 40, with the baffle being located in between the light source 40 and the door such as to shield the lens of the camera 100 from direct exposure to light rays 42 generated by the at least one light source 40.
  • the at least one light source 40 may comprise a plurality of light sources 40 arranged in any suitable arrangement such as an array or the like proximal to the ceiling 26 of the food preparation chamber 20 for providing a homogeneous illumination of the food preparation area 22 opposing the ceiling 26.
  • the baffle 50 may take any suitable shape, such as for example having a first planar portion 52 extending from the ceiling 26 towards the food support area 22, which first planar portion is arranged in between the at least one light source and the light transmissive body 30 and a further planar portion 54 extending from an end portion of the first planar portion 52 distal to the ceiling 26 towards the sidewall 24 of the food preparation chamber 20, which sidewall 24 opposes the light transmissive body 30.
  • FIG. 7 schematically depicts an example embodiment of a food preparation apparatus 10 in which the camera 100 is integrated within a ceiling 26 of the food preparation chamber 20 of the food preparation apparatus 10 such that the field of view 110 of the camera 100 is aligned with the food support area 22 for supporting the food 1 within the food preparation chamber 10.
  • the lighting arrangement including the at least one light source 40 and the baffle 50 is typically arranged outside the field of view 110 of the camera 100 on or proximal to a sidewall 24 of the food preparation chamber 20 such as to not obscure the view of the food support area 22 of the camera 100.
  • the ceiling 26 comprises a light transmissive body 30, e.g. a light transmissive cover such as a glass cover or the like behind which the camera 100 is positioned such that the light transmissive body 30 protects the camera 100 from direct exposure to the ambient conditions within the food preparation chamber 20, in particular during operation of the food preparation apparatus 10.
  • the camera 100 is mounted within the food preparation chamber 20 on its ceiling 26.
  • the light transmissive body 30 extends across the food preparation chamber 20 such as to provide a barrier between the food support area 22 and the camera 100 in order to protect the camera 100 from ambient conditions in the food preparation chamber 22, in particular during operation of the food preparation apparatus 10.
  • the lighting arrangement including the at least one light source 40 and the baffle 50 may be located at the same side of the light transmissive body 30 as the camera 100, in which case the baffle 50 is typically dimensioned such as to protect the camera 100 from glare by light emitted by the at least one light source 40, i.e., direct emissions as well as light rays 42 reflected by the light transmissive body 30 onto the lens of the camera 100.
  • the lighting arrangement including the at least one light source 40 and the baffle 50 to be located at the same side of the light transmissive body 30 as the food support area 22 such that the light transmissive body 30 is located in between the lighting arrangement and the camera 100, in which case the baffle 50 is typically dimensioned such as to shield the at least one light source 40 to protect the lens of the camera 100 from direct emissions of light rays 42 towards the lens of the camera 100.
  • the camera 100 is shown to be positioned in a centred position relative to the food support area 22, as in such a position the field of view 110 of the camera 100 typically can be aligned with the food support area 22.
  • the field of view 110 of the camera 100 may still be aligned with the food support area 22 without the camera 100 being centred over this area.
  • the shape of the baffle 50 may be adjusted such as to ensure that these off-centred locations of the camera 100 are appropriately shielded from glare. This for instance may mean that where the lighting arrangement comprises a plurality of light sources 40, the shape of the baffle 50 may change as a function of the relative location of such a light source 40 to the intended position of the camera 100 to ensure that light generated from these different relative locations cannot reach the intended position of the camera 100, as will be readily understood by the skilled person.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Preparation And Processing Of Foods (AREA)
EP21182974.2A 2021-04-01 2021-06-30 Intelligente lebensmittelzubereitungsvorrichtung mit beleuchtung Withdrawn EP4067750A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2021085034 2021-04-01

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EP4067750A1 true EP4067750A1 (de) 2022-10-05

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EP21182974.2A Withdrawn EP4067750A1 (de) 2021-04-01 2021-06-30 Intelligente lebensmittelzubereitungsvorrichtung mit beleuchtung

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474654A1 (fr) * 1980-01-29 1981-07-31 Rhone Fonderies Atel Dispositif d'eclairage pour four de cuisiniere a usage domestique
EP0271726A2 (de) * 1986-12-18 1988-06-22 Bosch-Siemens HausgerÀ¤te GmbH Beleuchtungseinrichtung für einen Backofen
DE102009027890A1 (de) * 2009-07-21 2011-01-27 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät mit verstellbarer Innenraumleuchte
US20160366314A1 (en) * 2015-06-12 2016-12-15 General Electric Company Oven camera assembly
US10440245B1 (en) 2018-05-02 2019-10-08 Haier Us Appliance Solutions, Inc. Oven appliance camera assembly including a light shield

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474654A1 (fr) * 1980-01-29 1981-07-31 Rhone Fonderies Atel Dispositif d'eclairage pour four de cuisiniere a usage domestique
EP0271726A2 (de) * 1986-12-18 1988-06-22 Bosch-Siemens HausgerÀ¤te GmbH Beleuchtungseinrichtung für einen Backofen
DE102009027890A1 (de) * 2009-07-21 2011-01-27 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät mit verstellbarer Innenraumleuchte
US20160366314A1 (en) * 2015-06-12 2016-12-15 General Electric Company Oven camera assembly
US10440245B1 (en) 2018-05-02 2019-10-08 Haier Us Appliance Solutions, Inc. Oven appliance camera assembly including a light shield

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