EP1715253A2 - Ofen mit Heissluftumwälzung, insbesondere zum Kochen von Lebensmitteln - Google Patents

Ofen mit Heissluftumwälzung, insbesondere zum Kochen von Lebensmitteln Download PDF

Info

Publication number
EP1715253A2
EP1715253A2 EP06111826A EP06111826A EP1715253A2 EP 1715253 A2 EP1715253 A2 EP 1715253A2 EP 06111826 A EP06111826 A EP 06111826A EP 06111826 A EP06111826 A EP 06111826A EP 1715253 A2 EP1715253 A2 EP 1715253A2
Authority
EP
European Patent Office
Prior art keywords
oven
chamber
air
oven according
ventilation 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.)
Withdrawn
Application number
EP06111826A
Other languages
English (en)
French (fr)
Other versions
EP1715253A3 (de
Inventor
Enrico Franzolin
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.)
Unox SRL
Original Assignee
Unox SRL
Unox 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 Unox SRL, Unox SpA filed Critical Unox SRL
Publication of EP1715253A2 publication Critical patent/EP1715253A2/de
Publication of EP1715253A3 publication Critical patent/EP1715253A3/de
Withdrawn legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to an oven with forced hot air circulation, particularly for cooking food.
  • Ovens with forced hot air circulation for cooking food generally comprise a muffle, in which the food to be cooked is arranged and behind which a ventilation chamber is associated, such chamber being connected to the muffle and accommodating means for producing the heating and forced circulation of air.
  • Such hot air circulation ovens are highly appreciated because of their ability to cook in an optimum manner food even when fully loaded, thanks to the uniform and constant distribution of the airflow within the muffle.
  • the accumulation of steam inside the oven can cause inconvenience when the oven access door is opened, since the steam, in addition to annoying a user while removing the food from inside the oven, can escape in such an amount that it cannot be aspirated completely by the hood that is generally arranged above the oven and spreads undesirably into the surrounding environment.
  • ovens which have, for example, means for the controlled inflow of air, which are constituted by a tube which is connected to the inside of the oven at one end and to the outside at the other end.
  • the inlet of the tube arranged outside is controlled by a mushroom-type flow control element, which is actuated by a solenoid inductor and is contrasted by a compression spring.
  • the end of the tube that lies inside the oven instead tapers, so that when the flow control element is open, air flows into the muffle by being aspirated by the lower pressure caused by the smaller cross-section of the tube end (Venturi effect).
  • vent stack for the outflow of the steam, which is propelled by the incoming air.
  • the internal end of the air intake tube is arranged in a corner of the muffle, while the inlet of the stack is at the opposite corner.
  • This arrangement does not allow to optimize the uniformity of the temperature and humidity in the muffle, with consequent different cooking qualities for the food.
  • the aim of the present invention is to provide an oven with forced hot air circulation, particularly for cooking food, which can obviate the drawbacks of known types of oven.
  • an object of the present invention is to provide an oven which is structurally simpler and cheaper, both in terms of components and in terms of assembly times.
  • Another object of the present invention is to provide an oven in which the steam is evacuated no less effectively than in known ovens.
  • Another object of the present invention is to provide an oven in which the degree of humidity in the muffle is more uniform than in known ovens.
  • a further object of the present invention is to provide an oven with forced hot air circulation, particularly for cooking food, which can be manufactured cheaply with known systems and technologies.
  • an oven with forced hot air circulation particularly for cooking food, of the type which comprises a muffle in which the food to be cooked is placed and to the rear of which a ventilation chamber is associated, said chamber being connected to said muffle and accommodating means for the heating and forced circulation of air
  • said oven being characterized in that said forced circulation means are constituted by at least one fan, the shaft of which is supported and actuated by a motor drive which is fixed externally with respect to the back of said chamber, said shaft passing through a hole in said back, the rim of which is adapted to form, with said shaft, an annular intake port whose cross-section is such as to optimize the exchange of air inside the oven, in relation to the position and cross-section of the inlet of a stack for venting from the ventilation chamber.
  • an oven with forced hot air circulation particularly for cooking food, according to the invention, is generally designated by the reference numeral 10.
  • the oven 10 comprises a muffle 11, in which the food to be cooked is placed.
  • a ventilation chamber 12 is arranged to the rear of the muffle 11 and is connected thereto.
  • the chamber 12 accommodates means for the heating and forced circulation of air.
  • the forced circulation means are constituted by a fan 13, a shaft 15 of which is supported and actuated by a motor drive 16, which is fixed externally with respect to a back 17 of the chamber 12.
  • the means for heating the air inside the ventilation chamber 12 are constituted by a coiled electrical resistor 22.
  • the coils 22 surround the fan 13, heating the air which it propels radially.
  • the shaft 15 passes through a hole 18, which is provided in the back 17 and the rim of which, according to the invention, forms with the shaft 15 an annular intake port 19.
  • the shaft differently from what is known, therefore does not rest on the rim of the hole 18 by interposing gaskets or bearings, but is supported in a cantilevered fashion by the motor drive 16.
  • Intake occurs, as shown schematically in Figure 4, owing to the lower pressure that occurs inside the chamber 12 in the region that surrounds the shaft 15 and thanks to the cross-section of the annular port 19, which is such as to optimize the exchange of the air within the oven 10, in relation to the position and cross-section of an inlet 20 of a stack 21 for venting from the chamber 12.
  • the motor drive 16 which in the embodiment described here is an electric motor, is fixed by means of screws to a sheet metal support 26, which has, around the hole 18, a concave portion 27 suitable to increase the Venturi effect generated by the annular port 19, forming a region at lower pressure than the space that surrounds the motor drive 16, which draws air which is then aspirated by means of the annular port 19 into the chamber 12.
  • the intake of the air by means of the port 19 that surrounds the shaft 15 causes the ambient-temperature air to strike both the motor 16 and the fan 13, cooling their components (bearings, the shaft 15, et cetera) and accordingly extending their life.
  • the motor drive 16 of an oven 10 operates at a temperature which is up to 35°C lower than the motor drives provided in known ovens.
  • the inlet 20 of the vent stack 21 is open on the back 17 of the ventilation chamber 12 and is provided with baffle means, which are adapted to optimize the conveyance of the humid air to be eliminated into the stack 21.
  • the inlet 20 of the vent stack 21 opens in the region of maximum pressure of the air stream on the internal face of the back 17 of the ventilation chamber 12.
  • the baffle means are constituted by a flap 23 which is perpendicular to the back 17.
  • the flap 23 is arranged on a diameter of the inlet 20, a position which has been found experimentally to be the optimum one, since the motor drive 16 is of the reversible type.
  • the flap 23 lies substantially on a plane which is tangent to the cylinder formed by the coils of the resistor 22.
  • the flap 23 has a substantially L-shaped contour, with a first part 23a thereof which is arranged in the ventilation chamber 12 and is rigidly coupled thereat to the back 17 with threaded couplings, while a second part 23b thereof is inserted within the inlet 20.
  • the baffle means are constituted by a portion 123a of a partition 123 which is perpendicular to the back 117 of the chamber 112.
  • the partition 123 separates the ventilation chamber into two compartments 112a and 112b, each of which contains one of the two fans 113 and 114.
  • the partition 123 is also perpendicular to the bottom 124 of the ventilation chamber 112.
  • the inlet 120 is arranged substantially centrally between the two fans 113 and 114, a position in which its ability to collect the vapors propelled by the fans is optimized.
  • the flap 23 of the first embodiment of the invention and the partition 123 of the second embodiment are both made of blanked and folded metal plate, with great savings in material and machining.
  • the present invention provides an oven which is structurally simpler and cheaper, both in terms of components and in terms of assembly times.
  • the present invention provides an oven in which the steam is evacuated no less effectively than in known ovens, and indeed more effectively, thanks to the particular placement of the stack inlet in the point of maximum pressure of the air on the back 17 of the ventilation chamber 12.
  • the present invention provides an oven in which the degree of humidity in the muffle is more uniform than in known ovens, thanks to the intake of air from outside in a central region of the ventilation chamber.
  • Such central intake region adds the advantage of reduced overheating of the motor drive 16 and of the shaft 15, with consequent advantages regarding the lifespan of these components.
  • the present invention provides an oven with forced hot air circulation, particularly for cooking food, which can be manufactured cheaply with known systems and technologies.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
EP06111826A 2005-04-13 2006-03-28 Ofen mit Heissluftumwälzung, insbesondere zum Kochen von Lebensmitteln Withdrawn EP1715253A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPD20050099 ITPD20050099A1 (it) 2005-04-13 2005-04-13 Forno a circolazione forzata d'aria calda, particolarmente per la cottura di alimenti

Publications (2)

Publication Number Publication Date
EP1715253A2 true EP1715253A2 (de) 2006-10-25
EP1715253A3 EP1715253A3 (de) 2007-12-26

Family

ID=36741318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06111826A Withdrawn EP1715253A3 (de) 2005-04-13 2006-03-28 Ofen mit Heissluftumwälzung, insbesondere zum Kochen von Lebensmitteln

Country Status (2)

Country Link
EP (1) EP1715253A3 (de)
IT (1) ITPD20050099A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008010360U1 (de) 2008-08-01 2008-10-02 Rational Ag Fluidführungseinrichtung und Gargerät hiermit
US8132500B2 (en) 2008-04-04 2012-03-13 Illinois Tool Works Inc. Humidity controlled food warming cabinet
US8378265B2 (en) 2008-01-28 2013-02-19 Duke Manufacturing Co. Convection oven
CN103217992A (zh) * 2013-03-19 2013-07-24 沈国庆 一种智能循环电动执行器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930957Y1 (de) * 1970-12-16 1974-08-21
IT1024113B (it) * 1974-05-18 1978-06-20 Zanussi Grandi Forro a convenzione forzata
JPS5981426A (ja) * 1982-10-28 1984-05-11 Matsushita Electric Ind Co Ltd 加熱装置
JP2529243B2 (ja) * 1987-03-17 1996-08-28 松下電器産業株式会社 加熱調理器
FR2660418A1 (fr) * 1990-04-03 1991-10-04 Bonnet Sa Four de cuisson d'aliments.
US5601070A (en) * 1996-06-17 1997-02-11 Middleby Marshall, Inc. Convection oven
US6943322B1 (en) * 2004-04-15 2005-09-13 Maytag Corporation Pressure exhaust system for a convection cooking appliance

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8378265B2 (en) 2008-01-28 2013-02-19 Duke Manufacturing Co. Convection oven
US8735778B2 (en) 2008-01-28 2014-05-27 Duke Manufacturing Co. Convection oven
US9074776B2 (en) 2008-01-28 2015-07-07 Duke Manufacturing Co. Convection oven
US9903598B2 (en) 2008-01-28 2018-02-27 Duke Manufacturing Co. Convection oven
US8132500B2 (en) 2008-04-04 2012-03-13 Illinois Tool Works Inc. Humidity controlled food warming cabinet
DE202008010360U1 (de) 2008-08-01 2008-10-02 Rational Ag Fluidführungseinrichtung und Gargerät hiermit
EP2149757A2 (de) 2008-08-01 2010-02-03 Rational AG Gargerät mit Fluidführungseinrichtung
CN103217992A (zh) * 2013-03-19 2013-07-24 沈国庆 一种智能循环电动执行器

Also Published As

Publication number Publication date
ITPD20050099A1 (it) 2006-10-14
EP1715253A3 (de) 2007-12-26

Similar Documents

Publication Publication Date Title
EP1211914B1 (de) Heizvorrichtung versehen mit einer Heizquelle unterschiedlicher von Mikrowellen bei einem Mikrowellenofen
US20150241069A1 (en) Wall oven cooling system
US10813491B2 (en) Appliance for cooking by heating flow with stirring means
CN114158903B (zh) 一种蒸烤烹饪控制方法及蒸烤箱和集成灶
KR100697022B1 (ko) 조리기기의 컨벡션 챔버
EP2636955B1 (de) Kochherd für Wärmeübertragung durch Konvektion
US6615819B1 (en) Convection oven
EP1748255A2 (de) Elektrischer Ofen
JP6898140B2 (ja) 加熱調理器
US20240015859A1 (en) Cooking device
CN211355060U (zh) 一种用于烤箱的排气结构
US6943322B1 (en) Pressure exhaust system for a convection cooking appliance
JP2009008297A (ja) 加熱調理器
US7282672B2 (en) Baking oven
EP1715253A2 (de) Ofen mit Heissluftumwälzung, insbesondere zum Kochen von Lebensmitteln
CN112545302B (zh) 烹饪器具
US20130008426A1 (en) Convection cooking using bake element heater
EP0959305A2 (de) Ofen mit Heissluftumwälzung
KR101411760B1 (ko) 전기오븐
CN216521867U (zh) 一种烹饪装置及具有该烹饪装置的集成灶
CN212089259U (zh) 底壳以及加热器具
JP4251156B2 (ja) 加熱調理器
EP1560464A1 (de) Wandmontierter Mikrowellenofen
KR100676135B1 (ko) 이중 컨벡션팬이 구비된 가열조리기
GB2349457A (en) Cooking appliance

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: UNOX S.R.L.

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20080627