EP0043959B1 - Gas- oder elektrisch beheizter Umluftofen zum Garen von Lebensmitteln - Google Patents

Gas- oder elektrisch beheizter Umluftofen zum Garen von Lebensmitteln Download PDF

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Publication number
EP0043959B1
EP0043959B1 EP81104950A EP81104950A EP0043959B1 EP 0043959 B1 EP0043959 B1 EP 0043959B1 EP 81104950 A EP81104950 A EP 81104950A EP 81104950 A EP81104950 A EP 81104950A EP 0043959 B1 EP0043959 B1 EP 0043959B1
Authority
EP
European Patent Office
Prior art keywords
blowers
oven
air
gas
radial
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.)
Expired
Application number
EP81104950A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0043959A3 (en
EP0043959A2 (de
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/de
Publication of EP0043959A3 publication Critical patent/EP0043959A3/de
Application granted granted Critical
Publication of EP0043959B1 publication Critical patent/EP0043959B1/de
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 invention relates to a gas or electrically heated convection oven for cooking food with several fans and switching means to change the direction of rotation of the fans.
  • the invention has for its object to provide a convection oven which does not have these disadvantages and which can create optimal conditions with regard to gas uniformity as well as air mixing and heat utilization.
  • the convection oven has a single tierless baking chamber, that the blowers are in pairs, arranged in a vertical plane, radial blowers, the blower housing enveloping the runners arranged symmetrically to the vertical center plane of the oven, enveloping and the most essential part of the Blower compressed air ducts, essentially delimited by the oven walls, is open towards the baking chamber, the blowers also being arranged symmetrically with respect to the ducts carrying compressed air which they act on, the whole in such a way that in one direction of rotation the blowers have a lower part these channels act as in the other direction of rotation, whereby a homogeneous heat treatment of the baked goods is achieved.
  • a forced air oven 1 has a foldable front wall 2 and two side walls 3 and 4 and a rear wall 5. It is covered at the bottom 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 fans 12 and 13 with a fan housing 36.
  • a heat exchanger Directly opposite a nozzle block 28 is 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 identified by means of a hot air stream 17.
  • the wall 15, together with corresponding baffles 21, defines an outlet nozzle 19 on both sides of the radiation and baffle wall 15, which directs the exhaust gas flow against the suction openings of the blowers 12, 13 and into the flow of the circulating air, which flows through a circulating air duct 22 flows back.
  • the baffles 21 define a suction / mixing space 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 guide walls, provide protection against high temperatures without disturbing a high level of turbulence in the circulating baking air, the result of which is an approximately uniform temperature field in the baking chamber 7.
  • the gas-heated device in the case of the gas-heated device, it is a flat-type radiation heating source for heating the air.
  • Four radial fans 12, 13 are arranged symmetrically on the long sides thereof.
  • the periodically reversed direction of rotation of the fans or the changed air flow ensures an astonishingly uniform temperature field of the baking air in the baking chamber.
  • the blower housings 36 which are designed as cylindrical half-shells, serve the same purpose, while the impellers of the radial blowers 12, 13 are equipped with flat, radial blades, so that their characteristic curve is independent of the running direction.
  • An electrically heated convection oven 41 (FIGS. 4, 5) has a foldable front wall 42 and two side walls 43 and 44 and a rear wall 45. At the bottom it is covered by a base 46. The top cover is not shown.
  • the walls with the bottom and an intermediate wall 61 define a baking space 47 in the main part, which lies at the front. Electrical heating elements 48 are fastened to the rear wall 45.
  • the coiled heating elements lie symmetrically to four motors 49 and 50 interacting in pairs. It is possible to provide only two, six or more such motors, which are arranged symmetrically to the furnace meridian plane.
  • the motors 49 and 50 drive radial blowers 52 and 53 with blower housings 76 made of sheet metal.
  • the path that the hot air flowing through the heating rods 48 takes is indicated by arrows 57.
  • the hot air stream 17 is drawn in by the radial fans 52, 53 through suction openings 62.
  • the blower housing 76 which is designed as a cylindrical half-shell, also supports a turbulent and thus temperature-constant flow throughout the baking chamber 47.
  • the impellers of the radial blowers 52, 53 are equipped with flat, radial blades, so that their characteristic is independent of the direction of rotation.
  • This symmetrical design makes it possible to dispense with baffles installed in the baking chamber to guide the hot air, usually slotted plates, and not only makes keeping the inside of the oven much easier, but also promotes the achievement of a practically homogeneous temperature field.
  • the circulated air volume of the blowers can also be adapted to the baked goods by means of appropriate control elements.
  • an explosion flap is provided for the gas version above the surface burner to prevent the destruction of oven parts.
  • a time relay is used, which can be set by hand 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)
  • General Preparation And Processing Of Foods (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Air Bags (AREA)
  • Furnace Details (AREA)
EP81104950A 1980-07-11 1981-06-26 Gas- oder elektrisch beheizter Umluftofen zum Garen von Lebensmitteln Expired EP0043959B1 (de)

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
CH5329/80 1980-07-11
CH532980 1980-07-11
CH3920/81 1981-06-15
CH392081 1981-06-15

Publications (3)

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

Family

ID=25694171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104950A Expired EP0043959B1 (de) 1980-07-11 1981-06-26 Gas- oder elektrisch beheizter Umluftofen zum Garen von Lebensmitteln

Country Status (8)

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

Families Citing this family (33)

* 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
US4817509A (en) * 1987-02-17 1989-04-04 Alternative Pioneering Systems Inc. Air Fryer
US5403607A (en) * 1987-02-17 1995-04-04 American Harvest, Inc. Method for rapidly cooking food
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
US5322007A (en) * 1991-08-15 1994-06-21 Heat And Control, Inc. Compact, high-capacity oven
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
KR100811923B1 (ko) * 2002-07-10 2008-03-10 듀크 매뉴팩쳐링 컴퍼니 음식 보온 장치 및 방법
US7105779B2 (en) * 2002-07-10 2006-09-12 Duke Manufacturing Company Food warming apparatus and method
US6943321B2 (en) * 2002-08-30 2005-09-13 Wolf Appliance Company, Llc Convection oven with forced airflow circulation zones
EP2087287B1 (en) * 2006-11-29 2017-01-04 LG Electronics Inc. Method of controlling oven
US8461488B2 (en) * 2007-01-17 2013-06-11 Lg Electronics, Inc. Oven
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
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
US8304695B2 (en) * 2008-12-16 2012-11-06 Whirlpool Corporation Priority controlled multi-fan convection oven
DE102010037284A1 (de) 2010-09-02 2012-03-08 Rational Ag Verfahren zur Durchführung eines Garprozesses
JP2018536826A (ja) 2015-10-30 2018-12-13 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． 熱風及び導入される流体により食品成分を調理するための装置及び方法
WO2017214129A1 (en) * 2016-06-06 2017-12-14 Alto-Shaam, Inc. Food service oven with multipoint temperature monitoring
TR201710035A2 (tr) * 2017-07-07 2019-01-21 Vestel Beyaz Esya Sanayi Ve Ticaret Anonim Sirketi Bir Pişirici Cihaz Ve Çalışma Yöntemi
US11045047B2 (en) 2017-11-10 2021-06-29 Ron's Enterprises, Inc. Variable capacity oven
WO2020088845A1 (en) * 2018-10-30 2020-05-07 Arcelik Anonim Sirketi A cooking device for homogeneous cooking
CN114052521A (zh) * 2020-07-27 2022-02-18 沙克忍者运营有限责任公司 台面烹饪系统

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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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patents Abstracts of Japan Band 4, Nr. 60, 06. Mai 1980 Seite 60M10 *

Also Published As

Publication number Publication date
NO155463B (no) 1986-12-22
DK301281A (da) 1982-01-12
ES503573A0 (es) 1982-04-16
GR74358B (lt) 1984-06-27
EP0043959A3 (en) 1982-03-31
EP0043959A2 (de) 1982-01-20
US4467777A (en) 1984-08-28
FR2486631B1 (lt) 1984-03-30
NO155463C (no) 1987-04-01
FR2486631A1 (fr) 1982-01-15
DE3165770D1 (en) 1984-10-04
NO812370L (no) 1982-01-12
ES8203564A1 (es) 1982-04-16

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