EP0043959A2 - Four à circulation d'air chauffé à gaz ou électriquement pour cuire des denrées alimentaires - Google Patents

Four à circulation d'air chauffé à gaz ou électriquement pour cuire des denrées alimentaires Download PDF

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Publication number
EP0043959A2
EP0043959A2 EP81104950A EP81104950A EP0043959A2 EP 0043959 A2 EP0043959 A2 EP 0043959A2 EP 81104950 A EP81104950 A EP 81104950A EP 81104950 A EP81104950 A EP 81104950A EP 0043959 A2 EP0043959 A2 EP 0043959A2
Authority
EP
European Patent Office
Prior art keywords
oven according
gas
oven
nozzle block
nozzles
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.)
Granted
Application number
EP81104950A
Other languages
German (de)
English (en)
Other versions
EP0043959A3 (en
EP0043959B1 (fr
Inventor
Hans-Rudolf Weber
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.)
Niro Plan AG
Original Assignee
Niro Plan AG
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 Niro Plan AG filed Critical Niro Plan AG
Priority to AT81104950T priority Critical patent/ATE9179T1/de
Publication of EP0043959A2 publication Critical patent/EP0043959A2/fr
Publication of EP0043959A3 publication Critical patent/EP0043959A3/de
Application granted granted Critical
Publication of EP0043959B1 publication Critical patent/EP0043959B1/fr
Expired 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
    • 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
    • F24C15/32—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 a gas or electrically heated convection oven for cooking food with at least one fan.
  • the present task aims to create a convection oven which does not have these disadvantages and which can create optimal conditions with regard to cooking uniformity as well as air mixing and heat utilization.
  • Such a circulating air oven is characterized in that switching means are arranged to change the direction of rotation of the fan, in the case of several fans e.g. individually, to change.
  • the oven 1 has a foldable front wall 2 and two side walls 3 and 4 and a rear wall 5. At the bottom it is covered by a base 6. The cover is not shown.
  • the walls with the floor define a baking chamber 7 in the main part, which lies at the front.
  • a gas burner mixing chamber 8 with a gas supply line 11 is provided on the rear wall 5.
  • the motors 9 and 10 drive radial blower rotors 12 and 13 with blower housings 36, which, however, can in principle also be replaced by cross-flow blowers.
  • a heat exchanger in the form of a radiation, convection and guide wall 15.
  • the path that the combustion gases flowing out of the nozzle block 28 take is indicated by arrows 17.
  • the wall 15, together with corresponding guide plates 21, defines on the two sides of the radiation and guide wall 15 an outlet nozzle 19 which directs the exhaust gas flow against the suction openings of the fan rotors 12, 13 and into the flow of the circulating air which flows through a Circulation air duct 22 enters.
  • the baffles 21 define a suction / mixing chamber 24, which ensures that the two fans do not suck in the hot combustion gases directly, but rather a mixture of air with a temperature of normally up to 300 ° C.
  • the fans together with the chamber walls and the other internals, create a high level of turbulence in the circulating baking air, the result of which is an almost uniform temperature field in the oven.
  • Figs. 1 and 2 and this is an important point of the present invention, in the case of the gas-heated device, it is a sheet-like radiant heat source for heating the air.
  • the gas burner consists of the nozzle block 28 made of ceramic material, which is preferably corrugated in one direction (FIG.
  • Main nozzles 29 are provided next to one another on the wave crests 33, while the secondary nozzles 30 are provided for the pilot flames in the wave troughs 34.
  • the nozzles 29 and 30 are connected to the gas / air mixing space 8. They are designed such that they form a short-flame, continuous flame carpet 31 when the flames are burning.
  • Four radial fans 12, 13 are provided symmetrically on its long sides. The high internal turbulence and the often reversed direction of rotation of the blower or blower or the changed air flow, for example in a two-minute cycle, ensure an astonishingly uniform temperature field of the baking air in the oven.
  • the fan guide plates 36 which are designed as cylindrical half-shells, serve the same purpose, while the impellers of the radial fans are equipped with radial blades, so that their characteristics are independent of the direction of rotation.
  • the electrically heated oven 41 (FIGS. 5, 6) has a foldable front wall 42 and two side walls 43 and 44 and a rear wall 45 a floor 46 covered. The cover is not shown.
  • the walls with the bottom and the intermediate wall 61 define a baking space 47 in the main part, which lies in front.
  • Electrical heating elements 48 are fastened to the rear wall 45.
  • the spiral heating elements are symmetrical to four motors 49 and 50. It is possible to provide only two or six or an odd number of such motors, which are arranged symmetrically to the furnace meridian plane.
  • Motors 49 and 50 drive radial blower rotors 52 and 53 with blower baffles 76, which, however, can in principle also be replaced by cross-flow blowers.
  • the path that the hot air flowing through the heating rods 48 takes is indicated by arrows 57.
  • the hot air flow 17 is sucked in by the radial fan blades 52, 53 through the suction openings 62.
  • Fig. 7 shows an embodiment with only one air blower.
  • the high internal turbulence and the often, e.g. in a two-minute cycle, the direction of rotation of the blower or blower or the changed air flow is reversed for an astonishingly uniform temperature field of the baking air in the oven.
  • the fan baffles 76 which are designed as cylindrical half-shells, also support a turbulent and thus temperature-constant flow in the entire baking chamber 47 that is as uniform as possible.
  • the impellers of the radial blowers are equipped with radial blades, so that their characteristics are independent of the direction of rotation.
  • baffles installed in the baking chamber to guide the warm air, usually slotted plates possible due to this symmetrical structure and thus makes it much easier to keep the inside of the oven clean.
  • the circulated air volume of the blowers can also be adapted to the baked goods by means of appropriate control elements.
  • a time relay which can be set manually, is used to achieve a uniform temperature and a uniformly turbulent flow, in order to reverse the direction of rotation of the motors and thus drive the fans in the opposite direction.
  • a thermostat-controlled microprocessor can also take over these functions. This creates an almost uniform air temperature, which is advantageous for achieving an optimal baking result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Furnace Details (AREA)
  • Air Bags (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
EP81104950A 1980-07-11 1981-06-26 Four à circulation d'air chauffé à gaz ou électriquement pour cuire des denrées alimentaires Expired EP0043959B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81104950T ATE9179T1 (de) 1980-07-11 1981-06-26 Gas- oder elektrisch beheizter umluftofen zum garen von lebensmitteln.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH532980 1980-07-11
CH5329/80 1980-07-11
CH392081 1981-06-15
CH3920/81 1981-06-15

Publications (3)

Publication Number Publication Date
EP0043959A2 true EP0043959A2 (fr) 1982-01-20
EP0043959A3 EP0043959A3 (en) 1982-03-31
EP0043959B1 EP0043959B1 (fr) 1984-08-29

Family

ID=25694171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104950A Expired EP0043959B1 (fr) 1980-07-11 1981-06-26 Four à circulation d'air chauffé à gaz ou électriquement pour cuire des denrées alimentaires

Country Status (8)

Country Link
US (1) US4467777A (fr)
EP (1) EP0043959B1 (fr)
DE (1) DE3165770D1 (fr)
DK (1) DK301281A (fr)
ES (1) ES8203564A1 (fr)
FR (1) FR2486631A1 (fr)
GR (1) GR74358B (fr)
NO (1) NO155463C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528593A1 (fr) * 1991-08-15 1993-02-24 Heat And Control, Inc. Four à vapeur pour le traitement de produits alimentaires
EP3425286A1 (fr) * 2017-07-07 2019-01-09 Vestel Beyaz Esya Sanayi Ve Ticaret A.S. Dispositif de cuisson et son procédé de fonctionnement

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671250A (en) * 1986-07-28 1987-06-09 Thermo Electron Corporation Direct-firing gas convection oven
US5403607A (en) 1987-02-17 1995-04-04 American Harvest, Inc. Method for rapidly cooking food
US4817509A (en) * 1987-02-17 1989-04-04 Alternative Pioneering Systems Inc. Air Fryer
AT403734B (de) * 1987-04-01 1998-05-25 Vanicek Friedrich Anordnung von axialventilatoren für holztrocknungsanlagen
US4920948A (en) * 1987-10-29 1990-05-01 Micro-Technology Licensing Corporation Parameter control system for an oven
US4867132A (en) * 1988-11-23 1989-09-19 Garland Commercial Industries, Inc. Gas fired convection oven with improved air delivery and heat exchange structure
US5121737A (en) * 1989-11-14 1992-06-16 Garland Commercial Industries, Inc. Convection cooking oven with enhanced temperature distribution uniformity
US5222474A (en) * 1989-11-14 1993-06-29 Garland Commercial Industries, Inc. Convection cooking oven with enhanced temperature distribution uniformity
US5466912A (en) * 1993-04-13 1995-11-14 American Harvest, Inc. Convection oven
US6140626A (en) * 1998-04-23 2000-10-31 Turbochef Technologies, Inc. System for rapid air temperature modification in a recycling oven
KR100388274B1 (ko) * 1999-12-11 2003-06-27 주식회사 엘지이아이 전자레인지의 대류팬제어방법
US6805112B2 (en) * 2001-06-27 2004-10-19 James T. Cole Convection oven having multiple airflow patterns
US6727478B2 (en) * 2002-02-05 2004-04-27 General Electric Company Multi rack oven and methods for operating same
US6730880B2 (en) * 2002-02-05 2004-05-04 General Electric Company Oven and methods for operating same
US7105779B2 (en) * 2002-07-10 2006-09-12 Duke Manufacturing Company Food warming apparatus and method
CN1691890B (zh) * 2002-07-10 2010-11-03 杜克制造公司 食物加热装置和方法
US6943321B2 (en) * 2002-08-30 2005-09-13 Wolf Appliance Company, Llc Convection oven with forced airflow circulation zones
US8242413B2 (en) * 2006-11-29 2012-08-14 Lg Electronics Inc. Method of controlling oven
WO2008105581A1 (fr) * 2007-01-17 2008-09-04 Lg Electronics Inc. Four
AU2009209178B2 (en) 2008-01-28 2014-05-15 Duke Manufacturing Co. Convection oven
US8138452B2 (en) * 2008-07-14 2012-03-20 Whirlpool Corporation Convection oven
US8350192B2 (en) * 2008-07-18 2013-01-08 Electrolux Home Products, Inc. Dual fan convection performance divider
US8304695B2 (en) * 2008-12-16 2012-11-06 Whirlpool Corporation Priority controlled multi-fan convection oven
US8097833B2 (en) * 2008-12-16 2012-01-17 Whirlpool Corporation Convection cooking in multi-fan convection oven
US8258435B2 (en) * 2008-12-16 2012-09-04 Whirlpool Corporation Dual fan convection oven
DE102010037284A1 (de) 2010-09-02 2012-03-08 Rational Ag Verfahren zur Durchführung eines Garprozesses
BR112018008687B1 (pt) 2015-10-30 2022-06-14 Koninklijke Philips N.V. Fritadeira à base de ar, e método de preparação de ingredientes alimentícios em uma fritadeira à base de ar
WO2017214129A1 (fr) * 2016-06-06 2017-12-14 Alto-Shaam, Inc. Four de restauration avec surveillance de température multipoint
US11045047B2 (en) 2017-11-10 2021-06-29 Ron's Enterprises, Inc. Variable capacity oven
WO2020088845A1 (fr) * 2018-10-30 2020-05-07 Arcelik Anonim Sirketi Dispositif de cuisson pour cuisson homogène
CN216293794U (zh) * 2020-07-27 2022-04-15 沙克忍者运营有限责任公司 台面烹饪系统

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Publication number Priority date Publication date Assignee Title
US1923145A (en) * 1931-01-28 1933-08-22 Leeds & Northrup Co Method and apparatus for heat treating
US3861378A (en) * 1969-08-27 1975-01-21 Lincoln Mfg Co Reversible air flow oven
US3620520A (en) * 1970-07-29 1971-11-16 Sunbeam Equip Furnace heating control system
DE2100818B2 (de) * 1971-01-08 1973-05-03 Vosswerke Gmbh, 3203 Sarstedt Vorrichtung zum erwaermen, garen, braten und auftauen von speisen
DE2145094C3 (de) * 1971-09-09 1975-05-28 G. Bauknecht Gmbh, Elektronische Fabriken, 7000 Stuttgart Ofen zum Erhitzen von Nahrungsmitteln
US4029463A (en) * 1973-01-26 1977-06-14 Tipe Revent Ab Method for baking food products
DE2346085A1 (de) * 1973-09-13 1975-03-27 Licentia Gmbh Bratofen mit beheizung und einem geblaese
IT1024113B (it) * 1974-05-18 1978-06-20 Zanussi Grandi Forro a convenzione forzata
GB1599655A (en) * 1977-08-09 1981-10-07 Tennant & Sons Warrington Ltd Gas burners
DE2739198C2 (de) * 1977-08-31 1985-06-27 Küppersbusch AG, 4650 Gelsenkirchen Gerät zum Garen von Eßwaren mittels Heißluft
US4162141A (en) * 1977-12-27 1979-07-24 West Clarence W Variable air flow oven
JPS5525773A (en) * 1978-08-14 1980-02-23 Matsushita Electric Ind Co Ltd Infrared radiant burner
DE7908555U1 (de) * 1979-03-27 1979-06-28 Fr. Winkler Kg, Spezialfabrik Fuer Baeckereimaschinen Und Backoefen, 7730 Villingen Etagenbackofen mit strahlungsheizung und backraum-luftumwaelzung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528593A1 (fr) * 1991-08-15 1993-02-24 Heat And Control, Inc. Four à vapeur pour le traitement de produits alimentaires
EP3425286A1 (fr) * 2017-07-07 2019-01-09 Vestel Beyaz Esya Sanayi Ve Ticaret A.S. Dispositif de cuisson et son procédé de fonctionnement

Also Published As

Publication number Publication date
NO155463C (no) 1987-04-01
DE3165770D1 (en) 1984-10-04
GR74358B (fr) 1984-06-27
US4467777A (en) 1984-08-28
EP0043959A3 (en) 1982-03-31
FR2486631A1 (fr) 1982-01-15
NO155463B (no) 1986-12-22
ES503573A0 (es) 1982-04-16
FR2486631B1 (fr) 1984-03-30
DK301281A (da) 1982-01-12
ES8203564A1 (es) 1982-04-16
NO812370L (no) 1982-01-12
EP0043959B1 (fr) 1984-08-29

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