EP3715724A1 - Backofenmuffel mit einer beleuchtungsvorrichtung zur beleuchtung des garraums - Google Patents

Backofenmuffel mit einer beleuchtungsvorrichtung zur beleuchtung des garraums Download PDF

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Publication number
EP3715724A1
EP3715724A1 EP20165400.1A EP20165400A EP3715724A1 EP 3715724 A1 EP3715724 A1 EP 3715724A1 EP 20165400 A EP20165400 A EP 20165400A EP 3715724 A1 EP3715724 A1 EP 3715724A1
Authority
EP
European Patent Office
Prior art keywords
muffle
wall
cooking chamber
supporting
lighting device
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Withdrawn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
EP20165400.1A
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English (en)
French (fr)
Inventor
Alberto Dall'oglio
Nebojsa Mastilovic
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.)
Smeg SpA
Original Assignee
Smeg SpA
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 Smeg SpA filed Critical Smeg SpA
Publication of EP3715724A1 publication Critical patent/EP3715724A1/de
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/008—Illumination for oven cavities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/16—Shelves, racks or trays inside ovens; Supports therefor

Definitions

  • the present invention relates to an oven muffle. Therefore, the reference technical field of the present invention is that of ovens (domestic and industrial) for cooking or heating dishes. More specifically, the technical field of the present invention refers to oven muffles equipped with lighting devices capable of illuminating the cooking chamber so that a user can easily check the cooking or heating state of the dishes.
  • the technical field of the present invention is not limited to a particular type of cooking of the dishes. In this sense, an oven according to the present invention can be an electric oven, a gas oven, a steam or humidified oven, a microwave oven, or a hybrid oven with various cooking modes.
  • domestic or industrial ovens for cooking or heating dishes include a particular internal structure known in the sector as a muffle which defines the cooking chamber. Outside the muffle there is an external frame and between the muffle and this external frame there are all the devices designed for the correct operation of the oven.
  • the muffle comprises a plurality of walls, which are interconnected to each other or made directly in one piece.
  • the muffle comprises a back wall, a roof wall, a floor wall, two lateral walls and a front door.
  • the door is movable (usually hinged to a lateral wall) between a first position, in which it closes the cooking chamber to reduce the dispersion of the cooking heat, and a second position in which it allows the user to access the cooking chamber.
  • the lateral walls of the muffle include supports or guides configured to support at least one shelf for dividing the cooking chamber into sub-chambers. As is known, these shelves allow several dishes to be cooked at the same time or the dishes to be brought closer to the roof wall where, for example, there may be an electric resistance for particular types of cooking.
  • the supporting devices for the shelves can be made in the form of protruding ribs or parallel grooves placed one above the other along the lateral walls from the floor to the roof of the cooking chamber.
  • muffles equipped with lighting devices configured for illuminating the cooking chamber are now available on the market, so that a user can easily check the cooking or heating state of the dishes.
  • a first example of these muffles provides for the presence of a light source in the area of the roof of the cooking chamber.
  • this solution is not optimal because, if a shelf is present in the oven, it is not able to illuminate dishes placed under a shelf, for example on a lower shelf or on the floor wall of the muffle.
  • a first available solution for this purpose for example, is described in DE102006061793 .
  • this document describes a muffle wherein each shelf is provided with a dedicated light source in the form of a horizontal light guide supported on a special support coupled to the lateral wall of the cooking chamber.
  • this solution is not particularly advantageous in view of the high number of components used for lighting.
  • a second example of a muffle with lighting devices configured to illuminate all the shelves is described in EP2746676 .
  • this vertical light guide extends over the entire height of the cooking chamber, and therefore with a single light source (for example, a LED) coupled to one of its ends it is possible to illuminate all the shelves in the oven.
  • the vertical light guide is supported, in the area of the lateral walls, by a special support equipped with reflective elements or can be supported by a special vertical recess in the lateral wall of the muffle.
  • EP2746676 also addresses the problem of correctly conveying the light emitted by the vertical light guide and preventing glare for the user.
  • the solution proposed in this document is to make particular surface processing in some portions of the vertical light guide so as to allow the emission of light at these surface-processed portions.
  • Even this solution described in EP2746676 although it actually reduces the devices in the muffle for lighting the cooking chamber, is not without drawbacks.
  • the presence of special devices solely intended to support the vertical light guides are however additional elements to be provided in the cooking chamber, and on the other hand, the surface processing for partially shielding the light guides makes this solution not advantageous economically.
  • the main object of the present invention is to provide a muffle equipped with lighting devices wherein all the shelves in the oven can be illuminated with a few simple components.
  • the present invention relates to an innovative oven muffle, wherein this muffle defines a cooking chamber and comprises:
  • the main aspect of the present invention is the interaction between one of the devices for supporting the shelves and the lighting device, where interaction means their mutual positioning inside the cooking chamber, and preferably also particular profiles of some portions of these elements.
  • the lighting device is positioned close to a supporting device, which is configured for partially shielding the light emitted by the lighting device.
  • two functions now delegated to two distinct components namely the structural function of supporting the shelves and the optical function of partially shielding the light emitted by the lighting device, are synergistically combined in a single component.
  • the supporting devices can be made in any shape as long as they are capable of performing the aforementioned dual function, and the lighting device can also be of any type.
  • the attached figures will describe a particularly advantageous embodiment of the invention wherein the number of components used is reduced.
  • the device for supporting the shelves which also houses the lighting device, is configured to shield the light emitted towards the muffle door, or generally towards a user who intends to observe the inside of the cooking chamber from the outside.
  • the glare for the user is prevented in a simple and inexpensive way without requiring particular surface processing of the lighting device.
  • the muffle comprises a front supporting device opposite the back wall and close to the door, and a rear supporting device close to the back wall.
  • the support configured to shield the light emitted by the lighting device is one of the two front supporting devices.
  • the muffle comprises two lighting devices, each of which is associated with a front supporting device in the manner provided according to the present invention.
  • the rear supporting devices can be the same as or different from the front ones. In fact, for economy of scale, the rear supporting devices can be identical to the front ones. However, their retracted position would make it difficult to prevent glare for the user if the lighting devices were housed therein, and therefore usually the rear supporting devices only have the structural function of supporting the shelves.
  • the devices for supporting the shelves are made in the form of uprights or vertical supports.
  • the uprights extend substantially over the entire height of the cooking chamber from the floor wall to the roof wall, so as to guarantee cooperation with lighting devices capable of illuminating all the shelves that may be present.
  • the uprights supporting the shelves are a substantially cylindrical body made of an electrically insulating material.
  • the lighting device comprises a cylindrical light guide extending along the entire vertical length of the respective supporting device.
  • cylindrical refers to a body with surfaces defined by parallel generators regardless of the cross section of the body itself.
  • the light emitted by the light guide is introduced into it by at least one LED located outside the muffle as described in EP2746676 . This solution is extremely advantageous because it cuts down to one the number of lighting devices for illuminating all the shelves.
  • each front supporting device comprises a cylindrical body with a first wall contacting the respective lateral wall of the muffle and a second wall opposite the first and configured to support shelves, or lateral frames for supporting shelves.
  • the light guide (or the lighting device in general) is positioned in the cooking chamber at a distance from the lateral wall less than the distance from the second wall, so as to be entirely contained in the projection of the body of the front supporting device towards the back wall of the muffle.
  • the front supporting device comprises a lip portion extending from the second wall towards the back wall beyond the body of the upright.
  • the light guide (or the lighting device in general) is positioned in the cooking chamber so that the projection of the lip on the lateral wall of the muffle intersects at least part of said light guide.
  • this type of lighting device can also be independent of the section a of the upright, meaning that the upright can have other shapes (for example, it may have a real seat for housing different lighting devices), or vice versa, the lighting device can be a single vertical cylindrical light guide that cooperates with differently shaped supporting devices (provided they are always able to shield part of the light emitted).
  • the front supporting devices have not only a shielding function but also the (original) structural function of supporting the shelves or the shelf-supporting frames.
  • the front uprights (as well as the rear ones) comprise, along their vertical length, a plurality of mushroom-shaped point protrusions configured to be coupled to one end of a shelf-supporting frame equipped with a corresponding slotted seat.
  • the frames can be easily removed for cleaning reasons or in order to possibly equip the muffle with different frames, for example telescopic frames, if required.
  • Figure 1 shows a schematic view of an embodiment of an oven muffle 1 according to the present invention.
  • the muffle 1 defines a cooking chamber 2 and comprises a plurality of walls.
  • Figure 1 shows a floor wall 3, a back wall 4, a roof wall 5 and two lateral walls 6 and 7.
  • the muffle 1 also comprises a door (not shown and usually hinged to a lateral wall) to selectively close and open the cooking chamber 2 with respect to the surrounding environment.
  • the oven incorporating the muffle 1 comprises, in a known manner, an external frame that encases the muffle 1, and the devices for the correct operation of the oven are housed in the cavity between the muffle 1 and the frame.
  • each lateral wall 6 and 7 is equipped with two uprights 8, 9, a front upright 8 at the door (not shown) and a rear upright 9 at the back wall 4 of the muffle 1, respectively.
  • Both the uprights 8 and 9 of each lateral wall 6 and 7 extend vertically along substantially the entire height of the lateral wall 6 and 7 and act as supporting devices for a plurality of parallel frames which, in turn, support shelves for dividing the cooking chamber 2 into sub-chambers.
  • the uprights 8 and 9 can be configured to directly support the shelves that divide the cooking chamber 2 into sub-chambers.
  • the uprights 8 and 9 are coupled to the lateral walls in a known manner, for example by means of rivets or threaded couplings.
  • This coupling is schematized by reference number 14.
  • the muffle 1 in Figure 1 comprises two lighting devices 11 wherein each of these devices 11 comprises a LED light source 12 and a cylindrical light guide 13 (i.e. in the form of a rectangular-section parallelepiped). As can be seen, the LEDs 12 are located outside the cooking chamber 2 at a first end of the light guide 13.
  • the lateral walls 6 and 7 have a recess towards the outside with respect to the cooking chamber 2 and the roof 5 so that, in its vertical movement, the light guide 13 has a first section external to the cooking chamber 2 (where the LED 12 is present) and a section internal to the cooking chamber 2.
  • the main aspect of the present invention relates to the relative positioning of the light guide 13 with the respective front upright 8 inside the cooking chamber 2, as well as the particular profile of said front upright 8.
  • Figures 2 and 3 show perspective views of a front upright 8 supporting the front of the frames 19 for the shelves.
  • the front upright 8 has a substantially constant section along its vertical length (i.e. from the floor to the roof of the muffle) and comprises a cylindrical body 21 provided with a first wall 15 for coupling to the respective lateral wall 6 of the muffle 1, and a second opposite wall 16 configured to (releasably) support the frames 19.
  • the first wall 15 is equipped with a plurality of holes 17 arranged one after the other along the length of the upright 8 and configured to receive the above-mentioned rivets or threads 14 passing through the lateral walls of the muffle.
  • the second wall 16 is a flat surface, in use parallel to the lateral wall 6, equipped with a plurality of mushroom-shaped point protrusions 18 arranged one after the other along the length of the upright 8.
  • These protrusions 18 are configured to be coupled to respective slotted seats obtained in the front end of the frames 19. This coupling is known per se and occurs by providing an inverted U-shaped seat at the front end of the frames 19 configured to be fitted by sliding on the respective protrusion 18 which, for this purpose, is in the shape of a mushroom.
  • Figure 4 shows a top view of the upright 8, i.e. a view along the arrow F of Figure 2 .
  • the second wall 16 is parallel to the lateral wall 6 of the muffle 1 and is at a distance D from the wall 6 of the muffle at least equal to the thickness of the body 21 of the upright 8.
  • Figure 4 shows that the second wall 16 has a lip extension 20 or a protruding portion with respect to the body 21 in the direction transverse to the length of the upright 8 towards the back wall 4 of the muffle 1. The following will show that the upright 8 and the aforementioned lip portion 20 collaborate with the light guide 13 in order to at least partially shield the light emitted by said light guide 13.
  • Figures 5 and 6 show the mutual positioning of the light guide 13 with respect to the upright 8 according to the present invention.
  • Figures 5 and 6 respectively, show a perspective view and a sectional view of the mutual positioning of the light guide 13 with respect to the upright 8.
  • the lighting device 11 is arranged close to the upright 8 which is configured to shield at least part of the light emitted by the light guide, in particular the light directed towards the opening of the muffle 1.
  • the light guide 13 is positioned in the cooking chamber 2 in a position such that it is located in a space between the lateral wall 6 and the extension of the second surface 16 of the upright 8 towards the back wall 4 of the muffle 1.
  • the light guide 13 is at a distance from the lateral wall 6 of the muffle 1 less than the distance D which separates the same lateral wall 6 of the muffle 1 from the second wall 16 of the upright 8. Therefore, in this example, the light guide 13 is entirely inside the projection of the upright 8 on the back wall of the muffle. Furthermore, as mentioned in the general description of the invention, the lighting device 11 is close to the supporting device 8. According to the example shown, this close positioning means positioning the light guide 13 in a position such that the projection P of the lip 20 on the lateral wall 6 at least partially intersects the light guide 13.
  • the positioning of the light guide 13 in the space between the lateral wall 6 of the muffle 1 and the second surface 16 of the upright 8 and the proximity of the light guide to said upright 8 allow the technical effect (anti-glare for the user) to be reached in a simple way, without adding other elements in the cooking chamber and even in the absence of surface processing on the light guide 13.
  • the light guide 13 has a rectangular section with a short side facing the upright. In this embodiment, the long side opposite to that facing the lateral wall of the muffle 1 is inclined relative to the lateral wall of the muffle 1 towards the back wall. This further prevents glare for the user.
  • the present invention does not set particular limits to the materials that can be used.
  • the uprights are made of an electrically insulating material (for example alumina oxide) so that the oven can be used in microwave mode without the risk of generating electric discharges.
  • the upright of the example shown solves the problems of the prior art underlying the present invention.
  • a single component installed in the cooking chamber performs both the structural function of supporting the shelves and the function of housing the lighting devices.
  • the particular shape of the upright shields the light along the direction of the door to prevent glare for a user and conveys the light optimally towards the inside of the cooking chamber.
  • the single vertical light guide allows all the shelves in the oven to be illuminated with a single device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)
EP20165400.1A 2019-03-25 2020-03-24 Backofenmuffel mit einer beleuchtungsvorrichtung zur beleuchtung des garraums Withdrawn EP3715724A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000004291A IT201900004291A1 (it) 2019-03-25 2019-03-25 Muffola per forno dotata di un dispositivo di illuminazione per illuminare la camera di cottura

Publications (1)

Publication Number Publication Date
EP3715724A1 true EP3715724A1 (de) 2020-09-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20165400.1A Withdrawn EP3715724A1 (de) 2019-03-25 2020-03-24 Backofenmuffel mit einer beleuchtungsvorrichtung zur beleuchtung des garraums

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EP (1) EP3715724A1 (de)
IT (1) IT201900004291A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4130579A1 (de) * 2021-08-02 2023-02-08 Miele & Cie. KG Verfahren zur herstellung eines gargeräts und gargerät

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006061739A1 (de) * 2006-12-28 2008-07-03 BSH Bosch und Siemens Hausgeräte GmbH Muffel für einen Backofen und Verfahren zum Ausleuchten eines Garraums
DE102012223465A1 (de) * 2012-12-17 2014-06-18 BSH Bosch und Siemens Hausgeräte GmbH Beleuchtung für ein Gargerät
EP2746676A1 (de) 2012-12-19 2014-06-25 BSH Bosch und Siemens Hausgeräte GmbH Beleuchtungsvorrichtung für ein Gargerät und Gargerät
EP2867581A1 (de) * 2012-07-02 2015-05-06 Illinois Tool Works Inc. Led-beleuchtungsvorrichtung zum beleuchten einer ofenkammer
US20160320069A1 (en) * 2015-04-30 2016-11-03 General Electric Company Lighting system for an oven appliance
EP3153780A1 (de) * 2015-10-08 2017-04-12 Miele & Cie. KG Gargerät

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006061739A1 (de) * 2006-12-28 2008-07-03 BSH Bosch und Siemens Hausgeräte GmbH Muffel für einen Backofen und Verfahren zum Ausleuchten eines Garraums
EP2867581A1 (de) * 2012-07-02 2015-05-06 Illinois Tool Works Inc. Led-beleuchtungsvorrichtung zum beleuchten einer ofenkammer
DE102012223465A1 (de) * 2012-12-17 2014-06-18 BSH Bosch und Siemens Hausgeräte GmbH Beleuchtung für ein Gargerät
EP2746676A1 (de) 2012-12-19 2014-06-25 BSH Bosch und Siemens Hausgeräte GmbH Beleuchtungsvorrichtung für ein Gargerät und Gargerät
US20160320069A1 (en) * 2015-04-30 2016-11-03 General Electric Company Lighting system for an oven appliance
EP3153780A1 (de) * 2015-10-08 2017-04-12 Miele & Cie. KG Gargerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4130579A1 (de) * 2021-08-02 2023-02-08 Miele & Cie. KG Verfahren zur herstellung eines gargeräts und gargerät

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Publication number Publication date
IT201900004291A1 (it) 2020-09-25

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