EP3546834A1 - Ofen ausgestattet mit einem waschsystem - Google Patents

Ofen ausgestattet mit einem waschsystem Download PDF

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Publication number
EP3546834A1
EP3546834A1 EP19165686.7A EP19165686A EP3546834A1 EP 3546834 A1 EP3546834 A1 EP 3546834A1 EP 19165686 A EP19165686 A EP 19165686A EP 3546834 A1 EP3546834 A1 EP 3546834A1
Authority
EP
European Patent Office
Prior art keywords
washing
cooking
zone
flow
water
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Withdrawn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
EP19165686.7A
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English (en)
French (fr)
Inventor
Luca Gemelli
Fabio Segato
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.)
Angelo Po Grandi Cucine SpA
Original Assignee
Angelo Po Grandi Cucine 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 Angelo Po Grandi Cucine SpA filed Critical Angelo Po Grandi Cucine SpA
Publication of EP3546834A1 publication Critical patent/EP3546834A1/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Withdrawn legal-status Critical Current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
    • F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
    • F24C14/005—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning using a cleaning liquid
    • 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
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising

Definitions

  • the invention relates to an oven for cooking food provided with a washing system.
  • Washing systems are known for washing an oven for cooking food that comprise:
  • the washing processes used in the ovens that use a washing system as disclosed above can be of various type, but all comprise at least one dirt-removal procedure, consisting of the following steps:
  • the step of recirculating the washing fluid is the most important step and the efficacy of the washing depends thereupon.
  • the washing fluid consisting of water and of a detergent product is dispensed continuously inside the cooking chamber and has to be distributed as evenly as possible over all the surfaces of the cooking chamber, so as to remove the dirt as effectively as possible and in as short a time as possible.
  • the distribution system and, in particular, the manner in which the washing fluid is dispensed and distributed inside the cooking chamber is accordingly of fundamental importance for obtaining an optimum washing result with minimal consumption of energy, water and detergent chemical product.
  • the recirculating step is important also in the rinsing procedure where the rinsing fluid consists of only water. Optimum distribution of the flow of water inside the cooking chamber helps to rinse better the walls of the cooking chamber and remove more effectively and faster the residues of the detergent chemical product.
  • Cooking chambers of ovens are generally divided into two zones by a wall known as a "conveyor", which separates the cooking zone in which the trays or the grilles are arranged, on which the foods to be cooked are arranged, from a heating zone in which hot air is produced that is sent to the cooking zone.
  • a heating element electrical resistance or gas heat exchanger
  • the conveyor has a circular opening in the centre at the suction port of the fan and has openings, generally arranged along the perimeter thereof or near thereto, through which hot air, heated by the heating element, passes from the heating zone to the cooking zone.
  • a pipe or a duct is located that leads a flow of water coming from the outside to the suction zone of the fan.
  • This flow of water is used to generate steam: the water exiting the duct is, in fact, nebulized by the fan or by another device connected thereto and radially diverted outside by the movement of the fan and, subsequently, knocking the heating elements, or passing near the heating elements, is transformed into steam.
  • the distribution of the washing fluid in the cooking chamber occurs by exploiting only the action of the fan.
  • the washing fluid is dispensed from the top of the cooking chamber opposite, and near, the conveyor, so that the freely falling flow passes in front of the port of the fan and is sucked up by the fan.
  • the sucking effect of the fan is not however sufficient to suck all the flow and accordingly part of the flow directly arrives on the bottom of the cooking chamber and from here to the drain, without contributing to wash the walls.
  • washing fluid is dispensed directly into the cooking zone (usually through the top of the cooking chamber).
  • the flow of air into the cooking zone is usually too weak to divert the entering flow of washing liquid and act in such a way that it hits the vertical walls of the cooking chamber.
  • the distribution circuit is provided with one or more dispensing devices that have the task of diverting the entering flow of washing liquid to the walls of the cooking chamber.
  • the dispensing devices can be fixed (for example distributing heads provided with nozzles, sprinklers, etc) or movable (for example comprising a rotating arm).
  • German utility model DE202012104832U1 and US patent application US2003/0159721 describe two different structural solutions for the dispensing system, arranged in both the solutions on the top of the cooking chamber approximately in the centre of the cooking zone.
  • the international patent application WO2015/091803 discloses a particular dispensing device arranged on the top of the cooking chamber in the cooking zone. In this case the dispensing device is also used to distribute the detergent chemical product.
  • German patent application DE 10 2012 004197 Another embodiment of this type is illustrated in German patent application DE 10 2012 004197 in which different solutions for dispensing the washing fluid are disclosed, some arranged in the cooking zone and others at the suction zone of the fan.
  • One object of the present invention is to provide an oven for cooking food provided with a washing system that is simple and cheap to make and enables all the zones of the cooking chamber to be reached with an appropriate flow of washing liquid.
  • a further object of the present invention is to provide a washing system for washing an oven that can be at least partially integrated with the system for supplying water for producing steam during cooking of the food.
  • the objects of the present invention are reached with an oven for cooking food provided with a washing system according to claim 1.
  • a washing system for washing an oven for cooking food that enables a flow of washing liquid to be sent inside the oven that ensures that each part of the cooking zone and of the heating zone of the cooking chamber is reached by a suitable quantity of washing liquid.
  • a part of the washing system according to the invention can be used to supply water for producing steam during cooking of the food.
  • Figure 1 shows a section of an oven 1 for cooking food according to the invention, provided with a body 2, inside which a cooking chamber 3 is defined, divided into a cooking zone 3a, inside which cooking of the food occurs, and into a heating zone 3b in which air is heated that is sent to the cooking zone 3a.
  • support elements 4 can be provided, which extend in a direction that is perpendicular to the plane of Figure 1 , on which trays or grilles (not shown) can be placed that are intended to support the food during cooking.
  • a fan 11 driven by a motor (not visible in the figures) and a heating element 16, consisting, for example, of a plurality of electrical resistances or of a heat exchanger, which heats the air in the heating zone 3b.
  • the cooking zone 3a and the heating zone 3b are separated by a wall 15, commonly known as a "conveyor", in which a first opening (not visible in the figures) is made at the suction zone 5 of the fan 11 and one or more second openings (which are not visible in the figures) at the delivery zone of the fan 11.
  • a first opening (not visible in the figures) is made at the suction zone 5 of the fan 11 and one or more second openings (which are not visible in the figures) at the delivery zone of the fan 11.
  • the fan 11 sucks air from the cooking zone 3, whereas through the second opening, or the second openings, the fan 11 sends to the cooking zone 3a heated air removed from the heating zone 3b.
  • a nebulizing element 20 is arranged that is configured for nebulizing a liquid sent to said suction zone 5.
  • One embodiment of the nebulizing element 20 is disclosed in Italian patent for industrial invention n. 0001368785, in the name of the same applicant, to which the reader is referred for
  • the supply system comprises a supplying and distributing assembly of a washing liquid configured for supplying and distributing said washing liquid in the cooking zone 3a and in the heating zone 3b.
  • the supplying and distributing assembly comprises a supply chamber 6, arranged, for example, in the upper part of the heating zone 3b, near an upper wall 17 of the oven 1.
  • the supply chamber 6 can be supplied with a washing liquid, consisting of a mixture of water and of a detergent substance, by a first supply conduit 7 and with water by a second supply conduit 8.
  • the supply chamber 6 communicates, through a first opening 13, with a distributor element, configured for distributing said washing liquid both in the cooking zone 3a and in the heating zone 3b.
  • the distributor element comprises a tubular conduit 9, a first end 18 of which communicates with said first opening 13 and a second end 19 of which, opposite the first end 18, terminates with a chute 10 oriented towards a suction zone 5 of the fan 11.
  • the supply chamber 6 is provided with a bottom 21 tilted by an angle ⁇ with respect to a longitudinal axis A of the tubular conduit 9.
  • the tilt angle ⁇ of the bottom 21 with respect to the longitudinal axis A has a size comprised advantageously between 30° and 60°. In one preferred embodiment of the present invention, the bottom 21 is tilted by about 45° with respect to said longitudinal axis A.
  • the second opening 14 is staggered downwards with respect to the first opening 13 in a direction parallel to the longitudinal axis A of the tubular conduit 9.
  • the second opening 14 is so arranged that a lower edge 22 thereof is located on an extension of the bottom 21 of the supply chamber 6, i.e. on a plane containing the bottom 21, or slightly higher than said plane, at a distance not above 20 mm.
  • a washing fluid is delivered consisting of a mixture of water and of a detergent chemical substance.
  • the flow rate of the washing fluid is comprised between about 10 1/min and about 20 1/min at a supply pressure comprised between 0.3 bar and 0.8 bar.
  • the flow rate of said mixture is 15 1/min, with a supply pressure of about 0.6 bar.
  • the flow of washing fluid delivered into the supply chamber 6 is directed from the bottom 21 to the first opening 13 and the second opening 14.
  • the second flow upon reaching the suction zone 5 of the fan 11, in which the nebulizing element 20 is arranged, is nebulized and distributed over the entire heating zone 3b, thus washing said zone.
  • the first flow after passing through the second opening 14, is distributed over all parts of the cooking zone 3a, owing to the kinetic energy thereof.
  • a rinsing procedure is conducted by delivering water into the supply chamber 6, again by the first supply conduit 7, at a flow rate comprised between about 10 l/min and about 20 l/min at a supply pressure comprised between 0.3 bar and 0.8 bar, so as to obtain complete rinsing of the cooking zone 3a and the heating zone 3b.
  • the flow rate of rinsing water is 15 1/min, at a supply pressure of about 0.6 bar.
  • a flow of water is delivered into the supply chamber 6 by the second supply conduit 8.
  • the flow rate of water delivered into the supply chamber 6 for producing of steam is much lower than the flow rate of washing liquid, or of rinsing water, delivered into the supply chamber 6 during the washing and rinsing procedures.
  • the flow rate of water delivered into the supply chamber 6 for producing steam is comprised between about 0.10 1/min and about 0.35 1/min. In one preferred embodiment of the present invention, the flow rate of water for producing of steam is equal to about 0.15 1/min.
  • the water for producing of steam delivered into the supply chamber 6 does not reach the second opening 14 of the tubular conduit 9 and flows by gravity until it reaches the chute 10, which directs the water into the suction zone of the fan 11 on the nebulizing element 20, which nebulizes the water and sends it to the heating element, or against the heating element, so that the water is transformed into steam, which is then delivered to the cooking zone 3a.
  • a first flow distributor element 23 is illustrated by means of which the washing liquid is distributed inside the cooking zone 3a of the cooking chamber 3, so as to obtain a distribution of the washing liquid as uniform as possible that enables all the parts of the cooking zone 3a to be reached, so as to obtain an effective washing of the entire cooking zone 3a.
  • the first flow distributor element 23 has a parallelepiped-shaped body 24, with a cage-shaped structure 25 that extends on three adjacent sides of the body 24 and is open at a fourth side.
  • the body 24 is provided with a first pair of hooking elements 26 and with a second pair of hooking elements 27, by means of which the flow distributor element 23 can be hooked onto the tubular conduit 9, at the second opening 14, so that the latter is at the open fourth side of the cage-shaped structure 25.
  • the first flow of washing liquid passes through the second opening 14, it enters the first flow distributor element 23 through the fourth open side of the cage-shaped structure 25 and interacts with said structure that divides said first flow of washing liquid into a plurality of parts that are distributed substantially evenly inside the cooking zone 3a, ensuring complete washing of the latter.
  • the flow of rinsing liquid that passes through the second opening 14 enters the first flow distributor element 23 and, by interacting with the cage structure 25, is divided and distributed substantially evenly in the cooking zone 3a, ensuring effective rinsing of the latter.
  • a second flow distributor element 28 is illustrated that comprises a parallelepipedon-shaped body 29 consisting of a lower part 29a and an upper part 29b connected together by two uprights 29c. Between the two uprights 29c, a passage 30 is defined through which the first flow of washing, or rinsing, liquid can pass.
  • the body 29 is provided with a flow distributor device 31 that comprises a first chute-shaped part 32 that widens towards the outside of the body 29, a second part 33 connected to an end 40 of the first part 32 facing the outside of the body 29, said second part 33 curving upwards, and a third part 34 connected to an end 41 of the second part 33 opposite said end 40 of the first part 32.
  • the third part 34 is tilted upwards.
  • the second part 33 and the third part 34 are provided with holes 35.
  • the body 29, like the body 24 of the first flow distributor element 23, is provided with a first pair of hooking elements 26 and with a second pair of hooking elements 27, by means of which the second flow distributor element 28 can be hooked to the tubular conduit 9, at the second opening 14.
  • the first flow of washing liquid traverses the second opening 14 and enters the second flow distributor element 28 through the passage 30, it is distributed on the first part 32 of the device 31 and is partially diverted upwards by the second part 33 and by the third part 34 of the flow distributor device 31 and partially downwards, passing through the holes 35, so as to be distributed substantially evenly inside the cooking zone 3a, ensuring complete washing of the latter.
  • the flow of rinsing liquid that traverses the second opening 14 enters the second flow distributor element 28 and, interacting with the flow distributor device 31, it is partially diverted upwards and partially downwards, being distributed substantially evenly in the cooking zone 3a, ensuring effective rinsing of the latter.
  • a third flow distributor element 36 is illustrated that comprises a parallelepiped-shaped body 37 consisting of a lower part 37a and an upper part 37b connected together by two uprights 37c. Between the two uprights 37c, a passage 38 is defined through which the first flow of washing, or rinsing, liquid can pass,
  • the body 37 is provided with a chute 39 tilted downwards, placed in a lower zone of the passage 38 and connected to the lower part 37a of the body 37.
  • the first flow of washing liquid after traversing the second opening 14, enters the third flow distributor element 36 through the passage 38, is conveyed from the chute 39 to the inside of the cooking zone 3a and is distributed substantially evenly inside the cooking zone 3a, ensuring complete washing of the latter.
  • the flow of rinsing liquid that passes through the second opening 14 enters the third flow distributor element 36 and is conveyed from the chute 39 to the inside of the cooking zone 3a so as to ensure effective rinsing of the latter.
  • the second flow distributor element 28 is hooked with the first hooking elements 26 to a crosspiece 42 provided in said second opening 14, and with the second hooking means 27 to the lower edge 22 of the second opening 14, so as to obtain stable fixing of the second flow distributor element 28.
  • Fixing the first flow distributor element 23 and the third flow distributor element 36 to the tubular conduit 9 is made in an identical manner to fixing of the second flow distributor element 28, disclosed above.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Commercial Cooking Devices (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detergent Compositions (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
EP19165686.7A 2018-03-29 2019-03-28 Ofen ausgestattet mit einem waschsystem Withdrawn EP3546834A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000004080A IT201800004080A1 (it) 2018-03-29 2018-03-29 Sistema di lavaggio di un forno

Publications (1)

Publication Number Publication Date
EP3546834A1 true EP3546834A1 (de) 2019-10-02

Family

ID=62751327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19165686.7A Withdrawn EP3546834A1 (de) 2018-03-29 2019-03-28 Ofen ausgestattet mit einem waschsystem

Country Status (2)

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EP (1) EP3546834A1 (de)
IT (1) IT201800004080A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3702678B1 (de) * 2019-02-26 2022-12-21 Electrolux Professional S.p.A. Backofen mit einem automatischen oder halbautomatischen reinigungssystem

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2842771A1 (de) * 1978-09-30 1980-04-10 Lechmetall Landsberg Gmbh Vorrichtung und verfahren zur waermebehandlung von nahrungsmitteln, insbesondere zur zubereitung von speisen
DE29606655U1 (de) * 1996-04-12 1996-06-20 Wiesheu-Wiwa GmbH, 71563 Affalterbach Ofen zur Wärmebehandlung von Lebensmitteln
EP0801271A1 (de) 1996-04-12 1997-10-15 Wiesheu-Wiwa GmbH Ofen und Verfahren zur Reinigung eines Ofenraums
US20020036196A1 (en) 2000-04-12 2002-03-28 Peter Kohlstrung Apparatus and method for cleaning the interior of a cooking device
US20030159721A1 (en) 2002-02-22 2003-08-28 Ubert Gastrotechnik Gmbh Food serving preparation oven with a cleaning device
WO2007098732A2 (de) 2006-03-03 2007-09-07 Rational Ag Verfahren zur reinigung eines gargerätes und gargerät
US20080223357A1 (en) 2007-03-08 2008-09-18 Janus Bartelick Self-cleaning cooking appliance
EP1978309A1 (de) * 2007-03-08 2008-10-08 Alto-Shaam, Inc. Selbstreinigende Kochvorrichtung
DE202012104832U1 (de) 2012-12-12 2013-01-14 Kärcher Futuretech GmbH Reinigungsdüse zum Reinigen eines Innenraums eines Gar- oder Kombidämpfgeräts
WO2013088227A2 (en) 2011-12-13 2013-06-20 Convotherm Elektrogerate Gmbh Cleaning cartridge for a heating apparatus for cooking food and mechanism for opening cartridge
DE102012004197A1 (de) 2012-03-01 2013-09-05 Rational Ag Gargerät mit Reinigungsfunktion
WO2015091803A1 (de) 2013-12-20 2015-06-25 i-clean Technologies GmbH Reinigerkartusche für reinigungsvorrichtung in öfen

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2842771A1 (de) * 1978-09-30 1980-04-10 Lechmetall Landsberg Gmbh Vorrichtung und verfahren zur waermebehandlung von nahrungsmitteln, insbesondere zur zubereitung von speisen
DE29606655U1 (de) * 1996-04-12 1996-06-20 Wiesheu-Wiwa GmbH, 71563 Affalterbach Ofen zur Wärmebehandlung von Lebensmitteln
EP0801271A1 (de) 1996-04-12 1997-10-15 Wiesheu-Wiwa GmbH Ofen und Verfahren zur Reinigung eines Ofenraums
US20020036196A1 (en) 2000-04-12 2002-03-28 Peter Kohlstrung Apparatus and method for cleaning the interior of a cooking device
US20030159721A1 (en) 2002-02-22 2003-08-28 Ubert Gastrotechnik Gmbh Food serving preparation oven with a cleaning device
WO2007098732A2 (de) 2006-03-03 2007-09-07 Rational Ag Verfahren zur reinigung eines gargerätes und gargerät
US20080223357A1 (en) 2007-03-08 2008-09-18 Janus Bartelick Self-cleaning cooking appliance
EP1978309A1 (de) * 2007-03-08 2008-10-08 Alto-Shaam, Inc. Selbstreinigende Kochvorrichtung
WO2013088227A2 (en) 2011-12-13 2013-06-20 Convotherm Elektrogerate Gmbh Cleaning cartridge for a heating apparatus for cooking food and mechanism for opening cartridge
DE102012004197A1 (de) 2012-03-01 2013-09-05 Rational Ag Gargerät mit Reinigungsfunktion
DE202012104832U1 (de) 2012-12-12 2013-01-14 Kärcher Futuretech GmbH Reinigungsdüse zum Reinigen eines Innenraums eines Gar- oder Kombidämpfgeräts
WO2015091803A1 (de) 2013-12-20 2015-06-25 i-clean Technologies GmbH Reinigerkartusche für reinigungsvorrichtung in öfen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3702678B1 (de) * 2019-02-26 2022-12-21 Electrolux Professional S.p.A. Backofen mit einem automatischen oder halbautomatischen reinigungssystem

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