EP2653786B1 - Ofen mit Beleuchtungssystem - Google Patents

Ofen mit Beleuchtungssystem Download PDF

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Publication number
EP2653786B1
EP2653786B1 EP12425075.4A EP12425075A EP2653786B1 EP 2653786 B1 EP2653786 B1 EP 2653786B1 EP 12425075 A EP12425075 A EP 12425075A EP 2653786 B1 EP2653786 B1 EP 2653786B1
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EP
European Patent Office
Prior art keywords
door
oven
support
longitudinal support
cooking chamber
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
EP12425075.4A
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English (en)
French (fr)
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EP2653786A1 (de
Inventor
Aldo Fumagalli
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.)
Candy SpA
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Candy SpA
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Publication date
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Priority to EP12425075.4A priority Critical patent/EP2653786B1/de
Priority to ES12425075.4T priority patent/ES2636412T3/es
Publication of EP2653786A1 publication Critical patent/EP2653786A1/de
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Publication of EP2653786B1 publication Critical patent/EP2653786B1/de
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/008Illumination for oven cavities
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/02Doors specially adapted for stoves or ranges
    • F24C15/04Doors specially adapted for stoves or ranges with transparent panels

Definitions

  • the present invention relates to an oven with an improved lighting system.
  • the present invention finds application in pyrolytic ovens.
  • Pyrolytic ovens are known in the art. In this particular type of ovens, an interior cleaning cycle may be initiated, which utilizes high temperature to reduce any organic residue in the cooking chamber of the oven.
  • the maximum temperatures attained during a cleaning cycle may exceed 450 °C. Therefore all the components in the proximity of the cooking chamber of the oven are exposed to high thermal stress.
  • Interior lighting is also a common feature of ovens, as it allows constant monitoring of food cooking degree.
  • a third common need is related to power savings, which has caused LEDs to become increasingly popular as lighting devices.
  • An example of a traditional oven using LEDs for lighting the cooking chamber is given by document EP 2336644 .
  • LEDs have a poor resistance to high temperatures: therefore, LEDs have never been used instead of normal incandescent lamps (which can withstand temperatures even higher than those reached inside ovens) that have been hitherto used for interior lighting of pyrolytic ovens.
  • the object of the present invention is to provide an oven having a LED lighting device.
  • the present invention affords advantages in terms of simple fabrication, greater strength, more compact design and/or higher versatility.
  • the directions “up/down”, “forward/backward”, “left/right”, in pairs and individually, are related to a user in front of the oven, in an ordinary position of use thereof.
  • numeral 1 generally designates an oven of the present invention.
  • the oven 1 may be a pyrolytic oven.
  • the oven 1 comprises a frame 4 which defines a cooking chamber 3.
  • the frame 4 has a front opening 46 for access to the cooking chamber 3.
  • the frame 4 has a base wall 41, two side walls 42, 44, a top wall 45 and a back wall 43. As shown in the figures, the front opening 46 is located opposite to the back wall 43.
  • the frame 4 also has a top opening 5 and a bottom opening 6 for air passage, whose purpose will be described in greater detail hereinbelow.
  • the devices that allow operation of the oven including the heating system and/or the ventilation system (not shown) are advantageously located in the frame 4.
  • the oven 1 further comprises a door 2, which is connected in an articulated fashion to the frame 4 and is adapted to move between an open position, to allow access to the cooking chamber 3 and a closed position, to close the front of the front opening 46 and prevent access to the cooking chamber 3.
  • the door 2 is hinged at the bottom to the frame 4, in this example via articulation means, generally referenced 7.
  • the door 2 comprises a support structure 21, which supports a plurality of panels, generally referenced 22.
  • the plurality of panels 22 comprises an outer panel 22a, an inner panel 22d and at least one intermediate panel between the inner panel 22d and the outer panel 22a.
  • the panels 22 are arranged to define respective cavities, generally referenced 23, therebetween.
  • the cavity 23a is defined between the panel 22a and the panel 22b
  • the cavity 23b is defined between the panel 22b and the panel 22c
  • the cavity 23c is defined between the panel 22c and the panel 22d.
  • the panels 22 are arranged parallel to one another and parallel to the plane defined by the support structure 21.
  • the panels 22 are made of a reflective material, to reduce the absorbed amount of heat radiated by the cooking chamber 3.
  • At least one of the panels 22, preferably all of them, are transparent, semi-transparent or partially transparent, for a user to see therethrough.
  • the outermost panel 22a substantially defines the outer surface of the door 2 of the oven 1
  • the innermost panel 22d substantially defines the inner surface of the door 2.
  • the support structure 21 of the door 2 comprises two posts 24, 25, which define the right and left sides of the door 2; the lower side is constrained by hinges, thereby allowing the opening and closing movements of the door 2.
  • each cavity 23 is defined at its sides by two posts 24, 25 of the support structure 21 and is open at its top and bottom so that, when the door 2 is in the closed position, the top and bottom openings of the cavity face the top and bottom air passage openings 5, 6 of the frame 4.
  • each cavity 23 which flow enters the cavity from the bottom opening and exits the upper opening and picks up part of the heat from the panels that defines the cavity as it flows therethrough, thereby cooling them.
  • a closing grid 35 extends between the two posts 24, 25, and allow air to flow into the cavities 23.
  • the oven 1 comprises ventilation means 50 which can increase the air flow through each cavity 23, thereby optimizing efficiency of heat extraction from the panels 22.
  • the ventilation means 50 may be located either downstream from the top opening, to suck in air therethrough and generate the air flow into the cavities 23 or upstream from the bottom opening to generate a delivery flow to the opening and into the cavities 23.
  • Each of the posts 24, 25 comprises a support for one or more panels 22; particularly the two posts 24, 25 together define a support for all the intermediate panels 22b, 22c, i.e. those that define, with the outer panels 22a, 22d, the cavities 23 of the door 2.
  • the post 24 may comprise seats 24a, 24b having the same size as the panels 22, and adapted to receive and support the panels 22. Opposed seats 25a, 25b are defined in the post 25.
  • the seats 24a and 25a are located in the lower portion of their respective posts, and the seats 24b and 25b are located in the upper portion of their respective posts.
  • the seats 24a, 24b of the post 24 are spaced from the opposed seats 25a, 25b of the post 25, at a distance that is slightly greater than the width of the intermediate panels 22b, 22c, between the two posts 24, 25, thereby allowing the intermediate panels 22b, 22c to smoothly slide in the horizontal direction X-X perpendicular to the vertical direction Y-Y.
  • the intermediate panels 22b, 22c gave some clearance between the two posts 24, 25.
  • the seats 24a, 24b are formed on the side of the post 24 that faces the interior of the door 2, i.e. the other post 25.
  • at least one of the seats 24a (but preferably all of them) substantially has a U shape, to prevent any movement of the panel 22 except a sliding movement on its own plane.
  • the post 24 comprises a longitudinal support 26 which substantially extends between the lower end and the upper end of the door 2 and a transverse support 27 which is coupled, e.g. by way of interlocking or form-fit engagement, to the longitudinal support 26, and overhangs toward the interior of the door 2 in the direction of the longitudinal support 28 and the transverse support 29 of the post 25.
  • the seats 24a, 24b are formed in the transverse support 27, and the seats 25a, 25b are formed in the transverse support 29.
  • the post 24 has a flat or substantially flat side facing the interior of the door 2.
  • such flat side may be the inner side of the longitudinal support 26.
  • each intermediate panel 22b, 22c may define a substantially continuous interface between two adjacent cavities 23. Nevertheless, it will be apparent from the above that some residual clearance may exist between each intermediate panel 22b, 22c and its posts 24, also depending on the temperature of the intermediate panel 22b, 22c and hence its expansion.
  • This residual clearance may cause increased heat exchange between two adjacent cavities 23, for reasons to be further clarified below.
  • a temperature-resistant sealant may be provided, or the door 2 may be designed for the influence of such heat exchange to be substantially lower than the overall heat exchange between two adjacent cavities 23.
  • the residual clearance when the door 2 is at ambient temperature may be of less than about 5 mm at each side, preferably less than about 3 mm, for instance about 2 mm.
  • the transverse support 27 may be made of a heat-resistant material, for instance a polymeric material, preferably reinforced with glass fibers.
  • the longitudinal support 26 may be also made of a heat-resistant material, for instance of one piece with the transverse support 27, or of metal.
  • the longitudinal support 26 is hollow and has an inner channel 26a open at its bottom and top and having respective bottom and top openings 26b, 26c which, with the door 2 in the closed position, face the bottom and top openings 6, 5 of the frame 4 of the oven 1 for air to flow therethrough and extract the heat absorbed by the longitudinal support 26.
  • a heat insulating material may be placed in the lower portion of the door 2 between the inner panel 22 and the longitudinal support 26, to reduce the amount of heat transferred to the longitudinal support 26.
  • the door 2 further comprises LED supporting means 30 connected to the support structure 21 and LED lighting means 40 mounted to the LED supporting means 30, to direct the light beam generated thereby to the interior of the cooking chamber 3, when the door 2 is in the closed position.
  • the LED lighting means 40 are placed in the cavity 23a formed between the outer panel 22a and the intermediate panel 22b adjacent to the outer panel 22a.
  • the particular configuration of the cavities 23, particularly the cavity 23a allows the heat radiated by the cooking chamber 3 to be effectively removed from the panels 22 and the chamber 23a to reach temperatures of less than 80°C, and be thus able to accommodate LED lighting means having commercially available LEDs.
  • the LED supporting means 30 are connected to the longitudinal support 26 and include an angular structure 31 having a portion 32 for attachment to the longitudinal support 26 and a portion 33 for supporting the LED lighting means 40.
  • the angular structure 31 extends parallel to the longitudinal support 26 in the direction Y-Y along at least one portion of the length of the longitudinal support 26.
  • the LED lighting means 40 are arranged along the angular structure 31 over a portion thereof, particularly to about 75% of the longitudinal length of the longitudinal support 26.
  • the LED lighting means 40 should not be located in the upper portion of the longitudinal support 26, where heat cannot be effectively removed.
  • the angular structure 31 has a substantially triangular shape, with a first side defining the attachment portion 31, arranged parallel to the inner side of the longitudinal support 26, a second side defining the support portion 32, which is inclined relative to the first side to direct the light beam generated by the LED lighting means 40 to the interior of the cooking chamber 3 when the door 2 is in the closed position, and a third side that connects the two sides 31, 32 and is placed parallel to the panel 22a,
  • the LED supporting means 30 and the LED lighting means 40 are in such positions that, when the door 2 is in the closed position, they are at least partially external to an ideal extension of the cooking chamber 3 beyond the front opening 43.
  • the LED supporting means 30 and the LED lighting means 40 are in such positions that the heat radiated from the cooking chamber 3 only partially impinges upon them.

Claims (8)

  1. Ofen (1) umfassend:
    - einen Rahmen (4), der eine Backkammer (3) definiert, wobei der Rahmen (4) eine frontseitige Öffnung (46) für den Zugang zur Backkammer (3) und eine oberseitige Öffnung (5) sowie eine unterseitige Öffnung (4) für den Luftdurchlass aufweist,
    - eine Tür (2), die in angelenkter Weise in dem Rahmen (4) eingebaut und dazu geeignet ist, zwischen einer offenen Stellung zur Ermöglichung des Zugangs zur Backkammer (3) und einer geschlossenen Stellung zur Schließung der frontseitigen Öffnung (46) und Verhinderung des Zugangs zur Backkammer (3) bewegt zu werden,
    wobei die Tür (2) eine Trägerstruktur (21) umfasst, die eine Außenscheibe (22a), eine Innenscheibe (22d) und wenigstens eine Zwischenscheibe (22b, 22c) zwischen der Außenscheibe (22a) und der Innenscheibe (22d) trägt, wobei die Scheiben (22a-22d) derart angeordnet sind, dass jeweilige Hohlräume (23a, 23b, 23c) zwischen ihnen definiert sind, wobei jeder Hohlraum seitlich durch die Trägerstruktur (21) definiert und an seiner Oberseite und seiner Unterseite offen ist, derart, dass in geschlossener Stellung der Tür (2) die oberseitige und die unterseitige Öffnung des Hohlraums der oberseitigen und der unterseitigen Luftdurchlassöffnung (5, 6) des Rahmens (4) zugewandt sind,
    - LED-Tragmittel (30), die mit der Trägerstruktur (21) verbunden sind,
    - LED-Leuchtmittel (40), die in den LED-Tragmitteln (30) eingebaut sind, um den hierdurch erzeugten Lichtstrahl in die Backkammer (3) zu richten, wenn die Tür (2) sich in geschlossener Stellung befindet, wobei die LED-Leuchtmittel (40) in dem Hohlraum (23a) angeordnet sind, der zwischen der Außenscheibe (22a) und der Zwischenscheibe (22b) gebildet wird, die sich neben der Außenscheibe (22a) befindet,
    wobei die Trägerstruktur (21) zwei Pfosten (24, 25) umfasst, wobei jeder Hohlraum an seinen Seiten von den beiden Pfosten (24, 25) definiert ist, wobei jeder Pfosten (24, 25) jeweils gegenüberliegende Sitze (24a, 24b, 25a, 25b) zum Aufnehmen und Tragen der Scheiben umfasst,
    - jeder Pfosten (24,25) umfasst einen Längsträger (26,28), der sich im Wesentlichen zwischen dem unteren Ende und dem oberen Ende der Tür (2) erstreckt, und einen Querträger (27, 29), der an den Längsträger (26, 28) gekoppelt ist und ins Innere der Tür (2) in Richtung des Längsträgers (28) und des Querträgers des anderen Pfostens überkragt, wobei die Sitze (24a, 24b, 25a, 25b) in ihren jeweiligen Querträgern (27, 29) gebildet werden,
    - der Längsträger (26, 28) ist hohl und weist einen inneren Kanal (26a) auf, der an seiner Oberseite und seiner Unterseite offen ist, mit jeweiligen oberseitigen und unterseitigen Öffnungen (26b, 26c), die bei geschlossener Stellung der Tür (2) den oberseitigen (5) und unterseitigen (6) Öffnungen des Rahmens (4) zugewandt sind,
    dadurch gekennzeichnet, dass die LED-Tragmittel (30) mit den Längsträgern (26) verbunden sind und eine gewinkelte Struktur (31) umfassen, die einen Abschnitt (32) zum Befestigen an den Längsträgern (26) sowie einen Abschnitt (33) zum Tragen der LED-Leuchtmittel (40) aufweisen.
  2. Ofen nach Anspruch 1, wobei die Sitze (24a, 24b) eines Pfostens (24) von den gegenüberliegenden Sitzen (25a, 25b) des anderen Pfostens (25) in einer Entfernung beabstandet sind, die etwas größer als die Breite der Zwischenpfosten (22b, 22c) zwischen den beiden Pfosten (24, 25) ist, derart, dass die Zwischenscheiben (22b, 22c) etwas Spiel zwischen den beiden Pfosten (24, 25) aufweisen.
  3. Ofen nach Anspruch 2, wobei die Zwischenscheiben (22b, 22c) bei Raumtemperatur auf jeder Seite ein Spiel von weniger als ca. 5 mm, bevorzugt von weniger als ca. 3 mm, mehr bevorzugt von ca. 2 mm aufweisen.
  4. Ofen nach Anspruch 1, wobei die gewinkelte Struktur (31) sich parallel zum Längsträger (26) entlang wenigstens eines Abschnitts der Länge des Längsträgers (26) erstreckt.
  5. Ofen nach Anspruch 1 oder 2, wobei die LED-Leuchtmittel (40) entlang der gewinkelten Struktur (31) über einen Abschnitt der gewinkelten Struktur (31) angeordnet sind.
  6. Ofen nach einem der Ansprüche 2 bis 5, wobei die gewinkelte Struktur (31) eine im Wesentlichen dreieckige Form aufweist, wobei die erste Seite den Befestigungsabschnitt (31) definiert, der parallel zu einer inneren Seite des Längsträgers (26) angeordnet ist, eine zweite Seite, die den Trägerabschnitt (32) definiert, der relativ zur ersten Seite geneigt ist, um den von den LED-Leuchtmitteln (40) erzeugten Lichtstrahl ins Innere der Backkammer (3) zu richten, wenn die Tür (2) sich in geschlossener Stellung befindet, und eine dritte Seite, die die erste und die zweite Seite (31, 32) verbindet und parallel zur Außenscheibe (22a) angeordnet ist.
  7. Ofen nach einem der Ansprüche 1 bis 6, wobei die LED-Tragmittel (30) und die LED-Leuchtmittel (40) sich in einer derartigen Anordnung befinden, dass sie sich bei geschlossener Stellung der Tür (2) wenigstens teilweise außerhalb einer ideellen Verlängerung der Backkammer (3) jenseits der frontseitigen Öffnung (43) befinden.
  8. Ofen nach einem der Ansprüche 1 bis 7, wobei die Belüftungsmittel (50) sich in einer Anordnung befinden, derart, dass Luft durch die oberseitige Öffnung (5) des Rahmens (4) angesaugt oder durch die unterseitige Öffnung (6) des Rahmens (4) ausgestoßen wird, um den Luftstrom durch jeden Hohlraum (23) zu erhöhen.
EP12425075.4A 2012-04-20 2012-04-20 Ofen mit Beleuchtungssystem Active EP2653786B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12425075.4A EP2653786B1 (de) 2012-04-20 2012-04-20 Ofen mit Beleuchtungssystem
ES12425075.4T ES2636412T3 (es) 2012-04-20 2012-04-20 Horno con sistema de iluminación

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12425075.4A EP2653786B1 (de) 2012-04-20 2012-04-20 Ofen mit Beleuchtungssystem

Publications (2)

Publication Number Publication Date
EP2653786A1 EP2653786A1 (de) 2013-10-23
EP2653786B1 true EP2653786B1 (de) 2017-07-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11022322B2 (en) 2019-01-04 2021-06-01 Whirlpool Corporation Cooking appliance with an imaging device
US11287140B2 (en) 2019-01-04 2022-03-29 Whirlpool Corporation Cooking appliance with an imaging device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20155043A1 (it) * 2015-10-19 2017-04-19 Piron S R L Forno per la cottura di prodotti alimentari
KR102493915B1 (ko) 2016-06-03 2023-02-01 삼성전자주식회사 오븐

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2906872B1 (fr) * 2006-10-05 2015-05-08 Brandt Ind Four de cuisson comprenant un dispositif de deflexion d'air.
EP1995522B1 (de) * 2007-05-25 2011-01-05 Candy S.p.A. Ofen
ITTO20090999A1 (it) * 2009-12-17 2011-06-18 Indesit Co Spa Sistema di illuminazione per un forno domestico e ad un forno provvisto di tale sistema di illuminazione

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11022322B2 (en) 2019-01-04 2021-06-01 Whirlpool Corporation Cooking appliance with an imaging device
US11287140B2 (en) 2019-01-04 2022-03-29 Whirlpool Corporation Cooking appliance with an imaging device
US11686477B2 (en) 2019-01-04 2023-06-27 Whirlpool Corporation Cooking appliance with an imaging device

Also Published As

Publication number Publication date
ES2636412T3 (es) 2017-10-05
EP2653786A1 (de) 2013-10-23

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