EP0076031A2 - Four de cuisson comportant au moins un élément radiant - Google Patents

Four de cuisson comportant au moins un élément radiant Download PDF

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Publication number
EP0076031A2
EP0076031A2 EP82304395A EP82304395A EP0076031A2 EP 0076031 A2 EP0076031 A2 EP 0076031A2 EP 82304395 A EP82304395 A EP 82304395A EP 82304395 A EP82304395 A EP 82304395A EP 0076031 A2 EP0076031 A2 EP 0076031A2
Authority
EP
European Patent Office
Prior art keywords
oven
wall
radiant
reflective
sheet
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Withdrawn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
EP82304395A
Other languages
German (de)
English (en)
Other versions
EP0076031A3 (fr
Inventor
Peter William Crossley
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.)
Thorn EMI Appliances Ltd
Original Assignee
Thorn EMI Appliances Ltd
Thorn EMI Domestic Appliances Ltd
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 Thorn EMI Appliances Ltd, Thorn EMI Domestic Appliances Ltd filed Critical Thorn EMI Appliances Ltd
Publication of EP0076031A2 publication Critical patent/EP0076031A2/fr
Publication of EP0076031A3 publication Critical patent/EP0076031A3/fr
Withdrawn legal-status Critical Current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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements

Definitions

  • This invention relates to improvements in ovens and is more particularly concerned with reducing heat losses in ovens, or using more of the heat generated for cooking.
  • an oven having at least one radiant element mounted substantially parallel to an upright wall thereof, characterised in that the oven contains reflective means, associated with the element, said reflective means being arranged to reflect radiant energy from the element away from the oven wall, and the oven further including lining means, associated with the oven wall, having an air outlet situated adjacent the top thereof to allow circulating air heated by the element to re-enter the oven from a space formed between the oven wall and the lining means.
  • the reflective means comprises a radiant - reflective sheet mounted in between the oven wall and the element, but the oven wall may instead be provided with a reflective coating or foil.
  • the foil is, preferably, of aluminium and may be glued to the oven wall.
  • the lining means preferably comprises an oven liner mounted between the element and the interior of the oven and modified so as to increase substantially the flow of circulating air over the element.
  • the circulating air in an oven carries soiling agents, such as grease from food and deposits them on the walls of the oven.
  • soiling agents are transported in circulating oven air in the vicinity of the oven wall
  • the reflective means is, preferably, a radiant reflective sheet with a rear surface capable of inhibiting radiant heat transfer.
  • the sheet is spaced from the oven wall, and the airgap between the sheet and the wall supresses conductive and convective heat flow to the wall, which means that energy may be saved by the radiant reflective sheet even when the front surface of the sheet becomes soiled. It has been found that savings in energy of up to 15% can be made by employing a radiant reflective sheet in this manner, for a centre oven temperature (C.O.T.) of 200 C median.
  • the reflective means comprises the said reflective coating or foil to avoid the expense of providing a separate radiant reflective sheet. It has been found that where a radiant-reflective sheet and a modified oven liner are provided heat losses from the element are reduced with the consequence that the temperature of the element is increased, as well as there being a substantial increase in the flow of circulating air over the element.
  • Figures 1 and 2 show a radiant element 1 of an oven which is mounted in a vertical plane in a manner known per se.
  • Radiant reflective means in the form of a metal sheet 2 is located in a vertical plane behind the element 1, and in between the element and a wall 3 of the oven.
  • the sheet 2 extends upwardly, downwardly and laterally just beyond the upward, downward, and lateral extent of the element which is disposed in front of the oven wall 3. This is to enable a radiant-reflective surface 2a of sheet 2 to receive substantially all the radiant energy from the element which is directed towards the oven wall 3.
  • a rear surface 2b of the sheet 2 exhibits low thermal emissivity, and thus inhibits radiant heat transfer.
  • the sheet 2 is supported on the oven wall 3 at its upper and lower extremities and this may be by any suitable means, for example by a bayonet fixing.
  • a narrow air gap 4 is defined by the sheet 2 and the oven wall 3 and this gap supresses conductive and convective heat flow to the wall. This, in conjunction with the low emissivity of surface 2b, means that the sheet is still capable of reducing heat losses even if the radiant-reflective surface 2a should become soiled with deposits emanating from cooking food which is uncovered.
  • Figure 3 shows a prior art oven including an oven cavity 5 1 and an oven liner 6' of conventional form, which can be compared with a modified oven liner 6 shown in Figure 4.
  • Figure 3 shows that a hot air pocket develops in a space 7' at the top of the oven in between the oven wall 3' and the oven liner 6'.
  • the modified oven liner 6 in Figure 4 is primarily for use in conjunction with the reflective sheet 2.
  • the oven liner 6 is shaped to increase the airflow over the element 1 as compared to the airflow over the element 1'a shown in the prior art in Figure 3, to thereby improve the efficiency of heat transfer.
  • the modified oven liner 6 is approximately 20 mm shorter at the bottom 6a than the oven liner 6' in Figure 3 in order to increase the area into which air from the oven cavity can flow.
  • the prior art shows a right-angled flow deflector 8' situated above air outlet 9' and in the embodiment shown in Figure 4 this deflector has been omitted, to permit a proportion of air flowing in between the oven wall and the liner to flow over the uppermost bar la of element 1.
  • the modified oven liner 6 has, in addition to air outlet 9, an extra air outlet 10 situated towards the top, to allow circulating air, heated by the element, to re-enter the oven cavity 5 from a space 7.
  • the modified oven liner 6, used in conjunction with a radiant reflective sheet 2 improves the efficiency of heat transfer from a radiant element which is located in a vertical plane.
  • an oven may comprise more than one heating element and may be provided with reflective means associated with one or more of the elements.
  • Oven liners which have been modified as described may also be associated with one or more of the elements.
  • Alternative materials to aluminium may be used, such as aluminised steel or stainless steel, and the reflective sheet may have a particular finish, such as being anodised.

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)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Display Devices Of Pinball Game Machines (AREA)
  • Glass Compositions (AREA)
EP82304395A 1981-09-26 1982-08-20 Four de cuisson comportant au moins un élément radiant Withdrawn EP0076031A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8129143 1981-09-26
GB8129143 1981-09-26

Publications (2)

Publication Number Publication Date
EP0076031A2 true EP0076031A2 (fr) 1983-04-06
EP0076031A3 EP0076031A3 (fr) 1985-07-10

Family

ID=10524769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82304395A Withdrawn EP0076031A3 (fr) 1981-09-26 1982-08-20 Four de cuisson comportant au moins un élément radiant

Country Status (4)

Country Link
EP (1) EP0076031A3 (fr)
JP (1) JPS5862439A (fr)
DK (1) DK421082A (fr)
ES (1) ES277010Y (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1519117A2 (fr) * 2003-09-19 2005-03-30 Electrolux Home Products Corporation N.V. Four de cuisson avec corps dissipateur de chaleur
ITMI20081260A1 (it) * 2008-07-10 2010-01-11 Whirlpool Co Forno con funzionalita' migliorata nella fase di grigliatura

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191322402A (en) * 1913-10-04 1914-09-24 Bertram Thomas Improvements in Electric Cooking Ovens.
GB592986A (en) * 1945-03-29 1947-10-06 Benham & Sons Ltd Improvements in or relating to electric cooking apparatus
GB664461A (en) * 1949-08-12 1952-01-09 Jackson Electric Stove Company Improvements relating to electrically heated ovens
CH336915A (de) * 1956-02-13 1959-03-15 Glanzmann Moritz Elektrischer Backofen mit Infrarot-Strahlung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191322402A (en) * 1913-10-04 1914-09-24 Bertram Thomas Improvements in Electric Cooking Ovens.
GB592986A (en) * 1945-03-29 1947-10-06 Benham & Sons Ltd Improvements in or relating to electric cooking apparatus
GB664461A (en) * 1949-08-12 1952-01-09 Jackson Electric Stove Company Improvements relating to electrically heated ovens
CH336915A (de) * 1956-02-13 1959-03-15 Glanzmann Moritz Elektrischer Backofen mit Infrarot-Strahlung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1519117A2 (fr) * 2003-09-19 2005-03-30 Electrolux Home Products Corporation N.V. Four de cuisson avec corps dissipateur de chaleur
EP1519117A3 (fr) * 2003-09-19 2008-11-26 Electrolux Home Products Corporation N.V. Four de cuisson avec corps dissipateur de chaleur
ITMI20081260A1 (it) * 2008-07-10 2010-01-11 Whirlpool Co Forno con funzionalita' migliorata nella fase di grigliatura
EP2144006A1 (fr) * 2008-07-10 2010-01-13 Whirpool Corporation Four avec fonctionnalité améliorée durant le grill
US8513573B2 (en) 2008-07-10 2013-08-20 Whirlpool Corporation Oven with improved functionality during grilling

Also Published As

Publication number Publication date
JPS5862439A (ja) 1983-04-13
EP0076031A3 (fr) 1985-07-10
DK421082A (da) 1983-03-27
ES277010U (es) 1984-08-16
ES277010Y (es) 1985-03-01

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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

Designated state(s): BE DE FR GB IT NL SE

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

Owner name: THORN EMI DOMESTIC APPLIANCES LIMITED

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL SE

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

Owner name: THORN EMI APPLIANCES LIMITED

17P Request for examination filed

Effective date: 19850930

17Q First examination report despatched

Effective date: 19860225

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19860701

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CROSSLEY, PETER WILLIAM