WO2016016860A1 - Four domestique - Google Patents

Four domestique Download PDF

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Publication number
WO2016016860A1
WO2016016860A1 PCT/IB2015/055816 IB2015055816W WO2016016860A1 WO 2016016860 A1 WO2016016860 A1 WO 2016016860A1 IB 2015055816 W IB2015055816 W IB 2015055816W WO 2016016860 A1 WO2016016860 A1 WO 2016016860A1
Authority
WO
WIPO (PCT)
Prior art keywords
radial fan
oven
resistance wire
fan
radial
Prior art date
Application number
PCT/IB2015/055816
Other languages
English (en)
Inventor
Federico ZOPPAS
Angelo Irrera
Roberto MERZ
Stefano Zanella
Original Assignee
I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini
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 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini filed Critical I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini
Priority to EP15760277.2A priority Critical patent/EP3194854B1/fr
Publication of WO2016016860A1 publication Critical patent/WO2016016860A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—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
    • F24C15/325—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation electrically-heated
    • 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
    • F24C15/006—Arrangements for circulation of cooling air
    • 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 present invention relates to a domestic oven for cooking food.
  • Ventilated domestic ovens are already known, i.e. ovens which provide the possibility of a so-called ventilated cooking system which allows to uniform the temperature inside the oven.
  • the ventilation is performed by an axial fan which conveys air onto an electric resistor positioned near the fan itself.
  • the air is heated, runs along the walls of the compartment and, once reached the door of the oven, is aspirated by the fan center to be pushed onto the electric resistor again.
  • the fan-resistor system is positioned on the wall opposite to the cavity door, as diagrammatically shown in Fig. 1 .
  • this configuration may generate an asymmetric air flow which leads to an imbalanced heat distribution at the walls of the oven compartment.
  • the fan, the electric resistor and the resistor support are disadvantageously assembled in the cavity of the oven at different times and according to different methods.
  • Another object of the invention is to make a domestic oven which also allows to improve the steam distribution inside the compartment if a steam diffusion device is provided inside the oven.
  • the present invention thus aims to reach the object discussed above by making a domestic oven provided with an inner compartment for cooking food which, according to claim 1 , comprises a radial fan, defining and revolving about an axis X, exclusively arranged on an upper wall of said inner compartment; at least one spiral coiled resistance wire, arranged along a circumference, coaxially outside said radial fan; wherein said radial fan is adapted to take air in from the inner compartment along the direction of axis X and to expel, radially with respect to axis X, air flows directed towards said at least one resistance wire, wherein a support structure is provided to support the radial fan and said at least one resistance wire,
  • said support structure is a closed housing, in which the radial fan and the at least one resistance wire are assembled, said closed housing being fixed to the upper wall of the inner compartment.
  • the radial fan is positioned only on the roof of the cavity or inner compartment of the oven in the oven of the invention.
  • a further advantage is that one or more spiral coiled resistance wires are provided near the roof, coaxially outside the radial fan.
  • the use of these simple resistance wires instead of the classic tubular serpentine resistor allows to have a smaller mass and to improve system efficiency.
  • Forced ventilation occurs because the air flows let out from the radial fan are directed onto the resistance wires, are heated and run along the roof and then downwards along the side walls of the compartment to reach the position of the tray or vessel containing the food. From the center of the tray, a resulting flow of air will go upwards again towards the center of the radial fan and the cycle will be repeated.
  • the radial fan positioned on the roof, can be coupled to the fan which cools the electronics and the door of the oven, a single motor being provided for both fans.
  • the oven of the present invention has an inner compartment for cooking food, closed by a door, the oven comprising:
  • a radial fan defining and revolving about an axis Y, exclusively arranged on a rear wall of the inner compartment, opposite to the oven door, the axis Y being substantially perpendicular to said rear wall,
  • said radial fan is adapted to take air in from the inner compartment along the direction of axis Y and to expel, radially with respect to axis Y, air flows directed towards said at least one resistance wire.
  • the support structure comprises a flat surface and a protective lid, which jointly define a closed housing, inside which the at least one resistance wire and the fan are provided.
  • the protective lid is provided with a least one series of first slots arranged peripherally, or laterally, along a respective circumference, at the at least one resistance wire for the radial ejection of air flows crossing said at least one resistance wire.
  • the lid may also be provided with at least one series of second slots arranged centrally along a respective circumference, at the radial fan, for the passage of aspirated air from the inner compartment.
  • one or more series of first slots can be provided arranged, for example, on circumferences at different axial heights along the rotation axis of the fan.
  • the cover can have one or more series of second slots, arranged, for example, along respective concentric circumferences of different radius.
  • the fan, the electric resistor and the support/protective lid of the resistor are mutually preassembled and form an integrated system, i.e. defining a single assembled component, which can be subsequently fitted in the oven cavity more simply and cost-effectively than in the prior art. Furthermore, there are advantages in terms of robustness and compactness by providing a preassembled component.
  • Fig. 1 is a diagram of an oven solution according to the prior art
  • Fig. 2 is a perspective view of a first embodiment of the oven according to the invention.
  • Fig. 3 is an enlargement of the view in Fig. 2;
  • Fig. 4 is a cross section of part of the oven in Fig. 1 ;
  • Fig. 5 is a perspective view of some components of the oven of the invention.
  • Fig. 6 is the same view as in Fig. 5, with one component less for better visibility of the other components;
  • Fig. 7 is a view of a second embodiment of the oven according to the invention.
  • Fig. 8 is a view of a third embodiment of the oven according to the invention.
  • Fig. 9 is a perspective view of a support structure according to the invention, which can be used in all embodiments.
  • FIGS. 2 to 4 show a first embodiment of a ventilated domestic oven, provided with an inner compartment for cooking food.
  • a ventilated domestic oven provided with an inner compartment for cooking food.
  • Such an oven comprises:
  • a radial fan 1 defining and revolving about an axis X, exclusively arranged on an upper wall 2 of the inner compartment, the axis X being substantially perpendicular to said upper wall 2;
  • the radial fan 1 is configured to take air in from the inner compartment along the direction of axis X and to expel, radially with respect to axis X, air flows directed towards said at least one resistance wire 3.
  • Each resistance wire 3, which can be single or more than one, consists of either a single winding or two or more windings appropriately connected to one another.
  • a support structure 4 is provided, which defines a closed housing, in which the radial fan 1 and the at least one resistance wire 3 are housed.
  • the support structure 4 comprises a base 16, or a flat surface, and a protective lid 17.
  • the base 16 is fixed to the upper wall 2, for example by means of screws.
  • the protective lid 17 can be defined, for example, by a spherical zone, i.e. by a part of a spherical surface comprised between two parallel planes which cut the sphere or by a spherical cap surface.
  • Such a protective lid 17 is provided with at least one series of first slots 14 arranged along a circumference. Near the radial fan 1 , preferably on the bottom of the lid, distal from the base 16, three series of second slots 15 are provided, wherein each series is arranged along a respective circumference. Such circumferences are preferably concentric and have a different radius from one another. A further air inlet slot 18 can be positioned at a central portion of the bottom of the lid, coaxial to the center of such circumferences. The number of the series of first and/or second slots can be varied.
  • the support structure 4, radial fan 1 and at least one resistance wire 3 are preassembled so as to form a single component to be installed in the oven.
  • a pipe 8 connected to a reservoir 10 outside the support structure 4 is provided inside the oven compartment, preferably but not necessarily on the support structure 4.
  • Such a pipe is provided with a plurality of holes 9 facing towards the upper wall 2 for releasing steam.
  • the pipe 8 is fed with water coming from the reservoir 10, by using a pump 21 , producing steam which exits from the holes 9.
  • the pipe 8 substantially circular in shape, is arranged between the at least one resistance wire 3 and the radial fan 1 , coaxially to said radial fan 1 .
  • the pipe 8 is arranged adjacently between the single resistance wire 3 or one of the resistance wires 3 and a tubular electric resistor 7, of substantially circular shape and coaxial to the radial fan 1 .
  • the resistor 7 transmits heat to the pipe 8 by conduction, the pipe 8 and the resistor 7 being mechanically and thermally connected.
  • the support structure 4 comprises a cavity facing towards the upper wall 2 of the compartment, having a circular bottom 5 for housing the radial fan 1 and a flared edge 6 onto which the single resistance wire 3 or the two or more resistance wires 3 are fixed by means of appropriate ceramic supports.
  • the pipe 8, arranged between a resistance wire 3 and the radial fan 1 can be provided in a connection zone between the circular bottom 5 and the flared edge 6.
  • the radial fan 1 is positioned so as to expel air flows, which at least partially brush the pipe 8 and the one or more resistance wires 3, and preferably also the tubular electric resistor 7, so as to heat and optimally distribute the air of the inner compartment of the oven and optimize the dispersion of steam released from the holes 9.
  • the outlet sections of the bladed impeller of the radial fan 1 are arranged at a height or position corresponding at least partially to the height or position of the pipe 8, of the one or more resistance wires 3 and of the tubular electric resistor 7.
  • a support structure may be provided as described for the first embodiment, comprising the base and the lid and the series of first and second slots.
  • a further either radial or axial fan 12 is provided, configured to aspirate cool air from the outside of the oven and to expel air flows for cooling the electronics of the oven and of the door 22 of said oven.
  • the further fan 12 is a radial fan arranged along the axis X itself and a single motor 13 is provided to actuate both the radial fan 1 , which operates on the hot air of the oven and the radial cooling fan 12.
  • an inner compartment for cooking food closed by a door is provided instead, the oven comprising:
  • a radial fan 1 ' defining and revolving about an axis Y (perpendicular to the sheet in Fig. 8), exclusively arranged on a rear wall 20 of the inner compartment, opposite to the oven door, the axis Y being substantially perpendicular to said rear wall 20,
  • the radial fan 1 is configured to take air in from the inner compartment along the direction of axis Y and to expel, radially with respect to axis Y, air flows directed towards said at least one resistance wire.
  • the resistance wire 3 which can be one or more than one, consists of either a single winding or two or more windings appropriately connected together.
  • a support structure 4 of the radial fan 1 ' and of the at least one resistance wire 3 is provided.
  • a pipe 8 connected to a reservoir 10 outside the support structure 4 is provided within the compartment of the oven, preferably but not necessarily on the support structure 4.
  • Such a pipe is provided with a plurality of holes 9 (not shown in Figure 8) at least partially facing towards the upper wall 2 of the compartment to release steam.
  • the pipe 8 is fed with water coming from the reservoir 10, by using a pump 21 , producing steam which exits from the holes 9.
  • the pipe 8 substantially circular in shape, is arranged between the at least one resistance wire 3 and the radial fan 1 ', coaxially to said radial fan 1 '.
  • the pipe 8 is arranged adjacently between the single resistance wire 3 or one of the resistance wires 3 and a tubular electric resistor 7, of substantially circular shape and coaxial to the radial fan 1 '.
  • the resistor 7 transmits heat to the pipe 8 by conduction, the pipe 8 and the resistor 7 being mechanically and thermally connected.
  • the support structure 4 comprises a cavity facing towards the rear wall 20 of the compartment, having a circular bottom 5 for housing the radial fan 1 ' and a flared edge 6 onto which the single resistance wire 3 or the two or more resistance wires 3 are fixed by means of appropriate ceramic supports.
  • the pipe 8, arranged between the one or more resistance wires 3 and the radial fan 1 ', can be provided in a connection zone between the circular bottom 5 and the flared edge 6.
  • the radial fan 1 ' is positioned so as to expel air flows, which at least partially brush the pipe 8 and the one or more resistance wires 3, and preferably also the tubular electric resistor 7, so as to heat and distribute in optimal manner the air of the inner compartment of the oven and optimize the dispersion of steam released from the holes 9.
  • the outlet sections of the bladed impeller of the radial fan 1 ' are arranged at least partially facing the pipe 8, the one or more resistance wires 3 and the tubular electric resistor 7.
  • a cooling cavity 1 1 arranged over the upper wall 2 of the inner compartment of the oven, is provided also in this third embodiment.
  • a further either radial or axial fan 12 is provided in such a cooling cavity 1 1 , which fan is configured to aspirate cool air from the outside of the oven and to expel air flows for cooling the electronics of the oven and of the door 22 of said oven.
  • a support structure can be provided as described for the first embodiment, comprising the base and the lid and the series of first and second slots.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

L'invention concerne un four domestique comportant un compartiment interne destiné à la cuisson d'aliments, le four comprenant : un ventilateur radial (1), définissant un axe (X) et tournant autour de celui-ci, disposé exclusivement sur une paroi supérieure (2) dudit compartiment interne, au moins un fil de résistance enroulé en spirale (3), disposé le long d'une circonférence, de manière coaxiale à l'extérieur dudit ventilateur radial (1), ledit ventilateur radial (1) étant conçu pour prélever l'air dans le compartiment interne dans la direction de l'axe (X) et pour évacuer, dans le sens radial par rapport à l'axe (X), les flux d'air dirigés vers ledit au moins un fil de résistance (3), une structure de support (4) étant fournie pour soutenir le ventilateur radial (1) et ledit au moins un fil de résistance (3).
PCT/IB2015/055816 2014-07-31 2015-07-31 Four domestique WO2016016860A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15760277.2A EP3194854B1 (fr) 2014-07-31 2015-07-31 Four domestique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM20140430 2014-07-31
ITRM2014A000430 2014-07-31

Publications (1)

Publication Number Publication Date
WO2016016860A1 true WO2016016860A1 (fr) 2016-02-04

Family

ID=51799241

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2015/055816 WO2016016860A1 (fr) 2014-07-31 2015-07-31 Four domestique

Country Status (2)

Country Link
EP (1) EP3194854B1 (fr)
WO (1) WO2016016860A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4008967A1 (fr) * 2020-12-07 2022-06-08 WELBILT Deutschland GmbH Appareil de cuisson, en particulier appareil de cuisson industriel
EP4158254A4 (fr) * 2020-06-02 2024-01-10 Femas Metal San. Ve Tic. A.S. Four à ensemble vapeur

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379189A (en) * 1966-08-08 1968-04-23 Gen Electric Forced convection oven
US3529582A (en) * 1968-12-09 1970-09-22 Gen Electric Self-cleaning forced convection oven
US3828760A (en) * 1973-05-23 1974-08-13 Lca Corp Oven
FR2614976A1 (fr) * 1987-05-06 1988-11-10 Seb Sa Four electrique pour la cuisson des aliments comprenant un generateur de vapeur
DE3941322A1 (de) * 1989-12-14 1991-06-20 Bosch Siemens Hausgeraete Dampfgarvorrichtung an einer backofenmuffel
WO1994018839A1 (fr) * 1993-02-26 1994-09-01 Food Automation Service Techniques, Inc. Four de rotisserie
DE19812465A1 (de) * 1998-03-23 1999-10-07 Miwe Michael Wenz Gmbh Dampferzeuger
US20040089648A1 (en) * 2002-07-29 2004-05-13 Griffey Dean J. Open coil heater element convection system for convection ovens and the like
EP1550828A1 (fr) * 2003-12-30 2005-07-06 Samsung Electronics Co., Ltd. Cuisinière à chauffage avec générateur de vapeur
EP1617148A1 (fr) * 2004-07-16 2006-01-18 Samsung Electronics Co., Ltd. Dispositif chauffant pour appareil de cuisson
US20080128405A1 (en) * 2006-11-15 2008-06-05 Lg Electronics Inc. Cooking device
DE102012200704A1 (de) * 2012-01-19 2013-07-25 E.G.O. Elektro-Gerätebau GmbH Garvorrichtung und Verfahren zum Betrieb einer Garvorrichtung
EP2636955A1 (fr) * 2012-03-08 2013-09-11 Electrolux Home Products Corporation N.V. Four de cuisson prévu pour le transfert de chaleur par convection

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379189A (en) * 1966-08-08 1968-04-23 Gen Electric Forced convection oven
US3529582A (en) * 1968-12-09 1970-09-22 Gen Electric Self-cleaning forced convection oven
US3828760A (en) * 1973-05-23 1974-08-13 Lca Corp Oven
FR2614976A1 (fr) * 1987-05-06 1988-11-10 Seb Sa Four electrique pour la cuisson des aliments comprenant un generateur de vapeur
DE3941322A1 (de) * 1989-12-14 1991-06-20 Bosch Siemens Hausgeraete Dampfgarvorrichtung an einer backofenmuffel
WO1994018839A1 (fr) * 1993-02-26 1994-09-01 Food Automation Service Techniques, Inc. Four de rotisserie
DE19812465A1 (de) * 1998-03-23 1999-10-07 Miwe Michael Wenz Gmbh Dampferzeuger
US20040089648A1 (en) * 2002-07-29 2004-05-13 Griffey Dean J. Open coil heater element convection system for convection ovens and the like
EP1550828A1 (fr) * 2003-12-30 2005-07-06 Samsung Electronics Co., Ltd. Cuisinière à chauffage avec générateur de vapeur
EP1617148A1 (fr) * 2004-07-16 2006-01-18 Samsung Electronics Co., Ltd. Dispositif chauffant pour appareil de cuisson
US20080128405A1 (en) * 2006-11-15 2008-06-05 Lg Electronics Inc. Cooking device
DE102012200704A1 (de) * 2012-01-19 2013-07-25 E.G.O. Elektro-Gerätebau GmbH Garvorrichtung und Verfahren zum Betrieb einer Garvorrichtung
EP2636955A1 (fr) * 2012-03-08 2013-09-11 Electrolux Home Products Corporation N.V. Four de cuisson prévu pour le transfert de chaleur par convection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4158254A4 (fr) * 2020-06-02 2024-01-10 Femas Metal San. Ve Tic. A.S. Four à ensemble vapeur
EP4008967A1 (fr) * 2020-12-07 2022-06-08 WELBILT Deutschland GmbH Appareil de cuisson, en particulier appareil de cuisson industriel

Also Published As

Publication number Publication date
EP3194854B1 (fr) 2018-10-24
EP3194854A1 (fr) 2017-07-26

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