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WO1997034490A1 - A heater unit for ovens - Google Patents

A heater unit for ovens Download PDF

Info

Publication number
WO1997034490A1
WO1997034490A1 PCT/DK1997/000118 DK9700118W WO9734490A1 WO 1997034490 A1 WO1997034490 A1 WO 1997034490A1 DK 9700118 W DK9700118 W DK 9700118W WO 9734490 A1 WO9734490 A1 WO 9734490A1
Authority
WO
WIPO (PCT)
Prior art keywords
door
cavity
oven
heater unit
food
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.)
Ceased
Application number
PCT/DK1997/000118
Other languages
French (fr)
Inventor
Christian Eskildsen
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Priority to EP97914170A priority Critical patent/EP0830063B1/en
Priority to AT97914170T priority patent/ATE222696T1/en
Priority to AU21522/97A priority patent/AU2152297A/en
Priority to DE69714927T priority patent/DE69714927D1/en
Publication of WO1997034490A1 publication Critical patent/WO1997034490A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising
    • 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
    • F24C15/008—Illumination for oven cavities
    • 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
    • F24C15/02—Doors specially adapted for stoves or ranges
    • 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
    • F24C15/08—Foundations or supports plates; Legs or pillars; Casings; Wheels
    • 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
    • F24C15/22—Reflectors for radiation heaters
    • 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

Definitions

  • the inventions concerns a heater unit for ovens for the preparation of food.
  • Ovens for the preparation of food generally consist of a cavity and heating means.
  • the traditional electrical oven has heating elements in conjunction with the walls of the cavity which is made of a heat resistant material, such as sheet metal. These heating means may be supplemented with radiating high temperature heating means, such as a grill.
  • More recent oven constructions circulate the hot air, and in some cases all the energy is supplied as hot air which is generated in a heater unit external to the cavity but connected to it by an inlet and an exhaust . The hot air is re-circulated in the oven-heater unit system, and is reheated before injection.
  • the door unit may be manufactured in a high-technology manufacturing plant with all electrical installations and controls. Such units may be individually tested on test benches which take up much less space than traditional test benches.
  • the manufacture of the oven itself may take place in a low-technology assembly plant where the door is a component connected by hinges and pluggable connections to the rest of the oven.
  • An advantageous embodiment of the invention is particular in that the components comprise a steam generating unit. This means that the whole cooking and baking process may be controlled entirely from the oven door.
  • a further advantageous embodiment is particular in that the cavity is free-standing and transparent. This enables the close supervision of the baking process, and there is no need to peer through the door window. In effect, the door may have no inspection function at all.
  • the lights for the inside of the cavity may also be placed in the door, and a suitable stream of air may prevent condensation on the sides of the transparent cavity.
  • a further advantageous embodiment comprises a radiating heating element in the door, the radiation of which is distributed over the food by means of an infrared reflector.
  • This reflector may perform a scanning motion in order to reach all the food.
  • Fig. 1 shows the principal components in an oven door according to the invention
  • Fig. 2 shows an infrared scanning device.
  • a cavity 1 for an oven Thi ⁇ cavity is quite thin and may be in a transparent material .
  • the cavity is closed by means of an oven door which is hinged at 2.
  • the oven door contains a heating unit consisting of a ventilator 3 rotated by a motor 4 which pulls air from air inlets 5 and 5' and heats it by means of a heating resistance 6.
  • the air is expelled through the flow control grid 7.
  • the temperature inside the oven is sensed by means of the temperature sensor 9, and the operation is controlled from a control panel 10 disposed at the top of the door above the handle 11.
  • the control panel also comprises a control computer for controlling the operation of heater 6 and the velocity of air by controlling the motor 4.
  • the internal wiring is not shown, however by means of plug 12 the door is connected to the oven chassis. This forms the only connection between the chassis and the oven door.
  • the controls also comprise a safety device which disables the heating and ventilator when the door is opened.
  • Fig. 2 a door which is similar to that shown in Fig. 1.
  • the cavity is shown in broken lines 1.
  • a halogen line source 13 is fitted inside a reflector 14.
  • the radiation which is both visible light and infrared is directed towards a reflector 15, from which it is directed towards the food, essentially covering the horizontal plane 16 inside the cavity.
  • the plane reflector 15 is a Fresnel-type reflector (cylindrical, i.e. with straight parallel prismatic reflectors) which is the only practical way to provide in a small space an uneven distribution of radiation in the directions a and b.
  • a greater part of the radiation from the halogen line source is directed towards a and relatively less towards b. This is necessary to provide an even radiation density over the plane 16.
  • a similar distribution may be obtained with a cylindrical curved reflector, however the space taken up by the reflector would be greater.

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)
  • Electric Ovens (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Tunnel Furnaces (AREA)
  • Resistance Heating (AREA)

Abstract

All components and installations for an oven for food preparation including controls are placed in the oven door. This means that the door can be connected by means of hinges and plugs to any door frame and any cavity. The cavity may be transparent so that the food may be inspected from any angle.

Description

otherhoc
A heater unit for ovens
The inventions concerns a heater unit for ovens for the preparation of food.
Ovens for the preparation of food generally consist of a cavity and heating means. The traditional electrical oven has heating elements in conjunction with the walls of the cavity which is made of a heat resistant material, such as sheet metal. These heating means may be supplemented with radiating high temperature heating means, such as a grill. More recent oven constructions circulate the hot air, and in some cases all the energy is supplied as hot air which is generated in a heater unit external to the cavity but connected to it by an inlet and an exhaust . The hot air is re-circulated in the oven-heater unit system, and is reheated before injection. It has been considered a complex task to redesign an oven to a different volume, because the cavity has to be reconstructed with new inlet and outlet vents, and the utilization of space outside the cavity has to be redesigned. Furthermore the temperature measuring means have to be redesigned and placed differently. This makes the change of models more expensive which reflects in the cost to the consumer or end user.
This situation is redressed by the invention which is particular in that all components, such as heating means, air circulating means, temperature control means, or adjustment means are disposed in the oven door. In this manner it becomes possible to have a completely free hand in designing the cavity which may be made any size smaller than the maximum that the door unit will supply.
The use of the invention also means that the door unit may be manufactured in a high-technology manufacturing plant with all electrical installations and controls. Such units may be individually tested on test benches which take up much less space than traditional test benches. The manufacture of the oven itself may take place in a low-technology assembly plant where the door is a component connected by hinges and pluggable connections to the rest of the oven.
An advantageous embodiment of the invention is particular in that the components comprise a steam generating unit. This means that the whole cooking and baking process may be controlled entirely from the oven door.
A further advantageous embodiment is particular in that the cavity is free-standing and transparent. This enables the close supervision of the baking process, and there is no need to peer through the door window. In effect, the door may have no inspection function at all. The lights for the inside of the cavity may also be placed in the door, and a suitable stream of air may prevent condensation on the sides of the transparent cavity.
A further advantageous embodiment comprises a radiating heating element in the door, the radiation of which is distributed over the food by means of an infrared reflector. This reflector may perform a scanning motion in order to reach all the food.
The invention will be described in greater detail with reference to the drawing, in which
Fig. 1 shows the principal components in an oven door according to the invention, and
Fig. 2 shows an infrared scanning device. In Fig. 1 is shown a cavity 1 for an oven. Thiε cavity is quite thin and may be in a transparent material . The cavity is closed by means of an oven door which is hinged at 2. The oven door contains a heating unit consisting of a ventilator 3 rotated by a motor 4 which pulls air from air inlets 5 and 5' and heats it by means of a heating resistance 6. The air is expelled through the flow control grid 7. In order not to heat the outside of the oven door it is insulated as shown at 8. The temperature inside the oven is sensed by means of the temperature sensor 9, and the operation is controlled from a control panel 10 disposed at the top of the door above the handle 11. The control panel also comprises a control computer for controlling the operation of heater 6 and the velocity of air by controlling the motor 4. The internal wiring is not shown, however by means of plug 12 the door is connected to the oven chassis. This forms the only connection between the chassis and the oven door. The controls also comprise a safety device which disables the heating and ventilator when the door is opened.
In Fig. 2 is shown a door which is similar to that shown in Fig. 1. The cavity is shown in broken lines 1. In order to provide radiant heat to the food, a halogen line source 13 is fitted inside a reflector 14. The radiation which is both visible light and infrared is directed towards a reflector 15, from which it is directed towards the food, essentially covering the horizontal plane 16 inside the cavity. The plane reflector 15 is a Fresnel-type reflector (cylindrical, i.e. with straight parallel prismatic reflectors) which is the only practical way to provide in a small space an uneven distribution of radiation in the directions a and b. A greater part of the radiation from the halogen line source is directed towards a and relatively less towards b. This is necessary to provide an even radiation density over the plane 16. A similar distribution may be obtained with a cylindrical curved reflector, however the space taken up by the reflector would be greater.

Claims

P A T E N T C L A I M S
1. A heater unit for ovens for the preparation of food c h a r a c t e r i z e d i n that all components, such as heating means, air circulating means, temperature control means, or adjustment means are disposed in the oven door.
2. A heater unit according to claim 1, c h a r a c t e r i z e d i n that the components comprise a steam generating unit.
3. A heater unit according to claim 1, c h a r a c t e r i z e d i n that the cavity is free-standing and transparent.
4. A heater according to claim 1, c h a r a c t e r i z e d i n that it comprises a radiating heating element in the door, the radiation of which is distributed over the food by means of an infrared reflector.
PCT/DK1997/000118 1996-03-18 1997-03-18 A heater unit for ovens Ceased WO1997034490A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP97914170A EP0830063B1 (en) 1996-03-18 1997-03-18 A heater unit for ovens
AT97914170T ATE222696T1 (en) 1996-03-18 1997-03-18 HEATING UNIT FOR OVENS
AU21522/97A AU2152297A (en) 1996-03-18 1997-03-18 A heater unit for ovens
DE69714927T DE69714927D1 (en) 1996-03-18 1997-03-18 HEATING UNIT FOR OVENS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK30296 1996-03-18
DK0302/96 1996-03-18

Publications (1)

Publication Number Publication Date
WO1997034490A1 true WO1997034490A1 (en) 1997-09-25

Family

ID=8092019

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1997/000118 Ceased WO1997034490A1 (en) 1996-03-18 1997-03-18 A heater unit for ovens

Country Status (5)

Country Link
EP (1) EP0830063B1 (en)
AT (1) ATE222696T1 (en)
AU (1) AU2152297A (en)
DE (1) DE69714927D1 (en)
WO (1) WO1997034490A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19836732A1 (en) * 1998-08-13 2000-02-24 Aeg Hausgeraete Gmbh Temperature indicator and sensor, for oven having glass door, to indicate to cook that door is too hot to touch
DE29922756U1 (en) 1999-12-24 2000-03-09 Wiesheu Gmbh, 71563 Affalterbach Oven with glass door for heat treatment of food
DE10019934A1 (en) * 2000-04-20 2001-10-31 We Ma Werkzeug Und Maschb Gmbh Device for a heating oven provided with an oven door
EP1182405A1 (en) 2000-08-17 2002-02-27 Schott Glas Temperature indicating device
WO2009107016A1 (en) 2008-02-29 2009-09-03 Indesit Company S.P.A. Household cooking oven
EP3165830A1 (en) 2015-11-03 2017-05-10 Arçelik Anonim Sirketi An oven with improved hot air circulation
EP3165829A1 (en) 2015-11-03 2017-05-10 Arçelik Anonim Sirketi An oven with improved hot air circulation
WO2019129451A1 (en) 2017-12-26 2019-07-04 Arcelik Anonim Sirketi Transparent cooker with vertical air duct
WO2019129438A1 (en) 2017-12-26 2019-07-04 Arcelik Anonim Sirketi Transparent cooker with air distribution from below
WO2019129436A1 (en) 2017-12-26 2019-07-04 Arcelik Anonim Sirketi Transparent cooker with modular air duct
US11454401B2 (en) 2019-01-11 2022-09-27 Lg Electronics Inc. Cooking appliance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR201721974A2 (en) 2017-12-26 2019-07-22 Arcelik As Profile Assembly and Electrical Connections in Transparent Cooker
EP3973828B1 (en) * 2019-01-11 2023-09-06 LG Electronics Inc. Cooking appliance

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1027739A (en) * 1910-09-30 1912-05-28 Wm Heap & Co Electric oven or cooker.
US2668898A (en) * 1949-12-09 1954-02-09 Tropic Aire Inc Electric food broiler
GB1089886A (en) * 1965-03-27 1967-11-08 Fellows Chamberlin Ltd Improvements relating to space heating appliances and doors therefor
US3564201A (en) * 1967-06-14 1971-02-16 Viking Sauna Co Compact sauna unit
US4163144A (en) * 1975-04-25 1979-07-31 Elmetherm Heated doors
DE3151094A1 (en) * 1981-12-23 1983-07-07 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart OVEN
FR2592915A1 (en) * 1986-01-15 1987-07-17 Alexandre Andre Door unit assembly equipped with a heating element

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1027739A (en) * 1910-09-30 1912-05-28 Wm Heap & Co Electric oven or cooker.
US2668898A (en) * 1949-12-09 1954-02-09 Tropic Aire Inc Electric food broiler
GB1089886A (en) * 1965-03-27 1967-11-08 Fellows Chamberlin Ltd Improvements relating to space heating appliances and doors therefor
US3564201A (en) * 1967-06-14 1971-02-16 Viking Sauna Co Compact sauna unit
US4163144A (en) * 1975-04-25 1979-07-31 Elmetherm Heated doors
DE3151094A1 (en) * 1981-12-23 1983-07-07 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart OVEN
FR2592915A1 (en) * 1986-01-15 1987-07-17 Alexandre Andre Door unit assembly equipped with a heating element

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19836732A1 (en) * 1998-08-13 2000-02-24 Aeg Hausgeraete Gmbh Temperature indicator and sensor, for oven having glass door, to indicate to cook that door is too hot to touch
DE29922756U1 (en) 1999-12-24 2000-03-09 Wiesheu Gmbh, 71563 Affalterbach Oven with glass door for heat treatment of food
DE10019934A1 (en) * 2000-04-20 2001-10-31 We Ma Werkzeug Und Maschb Gmbh Device for a heating oven provided with an oven door
EP1182405A1 (en) 2000-08-17 2002-02-27 Schott Glas Temperature indicating device
WO2009107016A1 (en) 2008-02-29 2009-09-03 Indesit Company S.P.A. Household cooking oven
EP3165830A1 (en) 2015-11-03 2017-05-10 Arçelik Anonim Sirketi An oven with improved hot air circulation
EP3165829A1 (en) 2015-11-03 2017-05-10 Arçelik Anonim Sirketi An oven with improved hot air circulation
WO2019129451A1 (en) 2017-12-26 2019-07-04 Arcelik Anonim Sirketi Transparent cooker with vertical air duct
WO2019129438A1 (en) 2017-12-26 2019-07-04 Arcelik Anonim Sirketi Transparent cooker with air distribution from below
WO2019129436A1 (en) 2017-12-26 2019-07-04 Arcelik Anonim Sirketi Transparent cooker with modular air duct
US11454401B2 (en) 2019-01-11 2022-09-27 Lg Electronics Inc. Cooking appliance
US12385650B2 (en) 2019-01-11 2025-08-12 Lg Electronics Inc. Cooking appliance

Also Published As

Publication number Publication date
DE69714927D1 (en) 2002-10-02
EP0830063B1 (en) 2002-08-28
EP0830063A1 (en) 1998-03-25
ATE222696T1 (en) 2002-09-15
AU2152297A (en) 1997-10-10

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