WO2017168376A1 - Appareil de cuisson et procédé d'assemblage - Google Patents

Appareil de cuisson et procédé d'assemblage Download PDF

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Publication number
WO2017168376A1
WO2017168376A1 PCT/IB2017/051842 IB2017051842W WO2017168376A1 WO 2017168376 A1 WO2017168376 A1 WO 2017168376A1 IB 2017051842 W IB2017051842 W IB 2017051842W WO 2017168376 A1 WO2017168376 A1 WO 2017168376A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
cooking apparatus
cooking
heating element
frangible
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/IB2017/051842
Other languages
English (en)
Inventor
Anthony ROWLAND
Harvey ROWLAND
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.)
Unisite Pty Ltd
Original Assignee
Unisite Pty 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
Priority claimed from AU2016901199A external-priority patent/AU2016901199A0/en
Application filed by Unisite Pty Ltd filed Critical Unisite Pty Ltd
Priority to AU2017243978A priority Critical patent/AU2017243978A1/en
Publication of WO2017168376A1 publication Critical patent/WO2017168376A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • A47J37/07—Roasting devices for outdoor use; Barbecues
    • 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
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/72—Plates of sheet metal

Definitions

  • This invention relates to electrical cooking apparatus and a method of increasing heat utilisation at the cooking surface of such apparatus.
  • Electrically powered barbecue (BBQ) installations that are provided in public areas, such as parks, picnic sites and camping grounds, typically comprise a housing into which is installed a heating apparatus, which presents a cooktop of stainless steel, defining a heatable cooking surface.
  • Such installations generally have an on/off switch and/or control dial connected to operate a thyristor or similar, to switch on a heating element, which is housed securely in a tamper-resistant heating enclosure.
  • the enclosure comprises an assembly of components and is mounted in a cavity below the cook top.
  • Such installations are notorious for uneven heat distribution within the cooking surface, symptomized by clearly noticeable relatively hot and cold areas. This can lead to meat placed on the surface being stewed instead of seared. This tends to lengthen the overall cooking process, leading to unnecessary energy consumption.
  • a further object of the invention is to provide a method of increasing energy efficiency in cooking apparatus.
  • a cooking apparatus comprising an electrical heating element and an abutting cooking plate and biasing means located to bias the element against the plate.
  • the biasing means comprises a compressible layer and a surface supporting the layer, the layer being located between said supporting surface and the heating element.
  • the compressible layer comprises frangible fibres.
  • the frangible fibres comprise silica.
  • the frangible fibres comprise at least 72% by mass silica as Si0 2 .
  • the frangible fibres comprise silica in the range from 90% to 98% by mass.
  • the cooking apparatus preferably comprises an enclosure having a floor defined by said supporting surface and by a wall peripherally disposed about the floor, the heating element being mounted within the enclosure.
  • the assembly comprises spacing means establishing a space between said compressible layer and the heating element.
  • the spacing means comprises a rigid plate.
  • the rigid plate comprises polished stainless steel providing a thermally reflective surface.
  • the plate has projections spacing the plate from the heating element.
  • the projections are on a side of the plate opposite to a side against which the compressible layer is disposed.
  • the projections have a cradling formation at their distal ends and are thus adapted for supporting the element at various points along the length of the element.
  • the element is thus spaced from the rigid plate while being urged against the cooking plate underside surface.
  • the projections may be integrally formed with the plate or may be fastened thereto, for example by rivets, or screw-threaded means, or by welding or suitable heat-resistant adhesive.
  • a method of increasing efficiency of heat transfer in a cooking assembly having a cooking plate heated by an electrical heating element located below it comprising the step of biasing the element into abutting relationship with the plate.
  • the biasing step comprises providing a compressible layer and a surface for supporting the layer, disposing the layer between said supporting surface and the heating element and urging said supporting surface toward the cooking plate thereby to exert biasing pressure on the element to press it against the plate.
  • the compressible layer comprises frangible fibres.
  • the method includes the step of allowing at least some of the frangible fibres to break when pressing the element against the plate.
  • the method includes the step of providing a space between said compressible layer and the heating element.
  • the method preferably further includes interposing spacing means between said element and the compressible layer.
  • the spacing means comprises a rigid plate.
  • the spacing means further comprises projections from the rigid plate for spacing the element from the rigid plate.
  • the projections are adapted to support the element. The method extends to forming cradle formations at the distal ends of the projections.
  • the method includes providing an enclosure having a floor defined by said supporting surface and by a wall peripherally disposed about the floor, and mounting the heating element within the enclosure.
  • the method further includes fastening the enclosure, with the element mounted within, to the cooking plate.
  • the method includes providing fastening means for use in fastening the enclosure and cooking plate together in thermally sealing relationship.
  • Figure 1 is a perspective view of a preferred embodiment of the cooking apparatus of this invention in exploded form.
  • Figure 2 is a cross-sectional view of the apparatus enclosure when operatively mounted.
  • FIG. 10 in a preferred embodiment of this invention, an example of electrical cooking apparatus, according to the invention, is generally denoted by the number 10 and shown in sideways exploded perspective view.
  • the heating apparatus is configured for mounting as an assembly into a secure housing, the relevant benchtop portion of which is shown in Figure 2. Access to the housing is via a lockable door, not shown. A rectangular aperture 74 is cut into the benchtop 72. The aperture is sized for receiving the assembly into a cavity in the housing, as will be described in more detail below.
  • the apparatus has an assembly clamp 12, which is shaped to have lipped formations 14, 14', 16, 16' to be brought into abutment with the underside 76 of benchtop 72 peripheral to aperture 74.
  • An element enclosure tray 24 is adapted to rest on the assembly clamp. It has sides 26 and a floor 28 with a centrally located aperture 30 and a protruding lip 32. The lip has apertures through which it is fastened to the underside of a cooking plate 46.
  • Assembly clamp 12 further has twin apertures 18, 18' and a central aperture 19 to allow for ventilation and avoid excessive heat build-up in the electrical components (not shown) located in the zone below enclosure tray 24.
  • a thermostat housing is spot welded to the element enclosure tray 24 and provides protection and mounting support for a thermostat (not shown).
  • the thermostat housing cover plate 20 is bolted on to the thermostat housing, to cover the wiring that is connected to the electrical heating element 22.
  • a textile glass insulating barrier sheet 34 is placed in enclosure tray 24, to cover its floor 28.
  • a preferred example of a textile glass product is a silica glass needle mat having silica of about 95% as Si0 2 .
  • a supplier of this product is the Australian corporation, Aleteck Pty Ltd, of 73-75 Thabeban Street, Bundaberg, QLD.
  • an element keeper plate 36 having a plurality of upwardly projecting spacer tabs 38.
  • Each of the tabs has a cradle formation 40 at its summit edge, shaped for cradling the heating element 22 substantially equidistantly from keeper plate layer 36, defining an intervening space, so that an air- filled barrier layer exists between them.
  • the tabs are cut and folded up out of the keeper plate, although other suitable fastening means may be employed.
  • the keeper plate is made from stainless steel, polished to enhance its reflectivity. It assists in directing dissipated heat from the element back toward the underside of the cooking plate.
  • the insulating barrier sheet 34 is of a compressible nature compared with the sheets above and below it, its compressibility provides biasing forces that act upwardly through the support sheet and its cradle formations to urge the element against the underside 44 of the cooking plate 46. This biasing effect is established when cooking plate 44 is urged towards tray 24 in the process of being secured thereto. This is described further below.
  • the cooking plate is of rectangular shape and made of stainless steel. It is of conventional design, having a peripheral raised lip 48 that seats on a bench gasket 50.
  • the gasket is made of thermally resistant vulcanized textile fibre of known composition.
  • the cooking plate has locator pins 52 that locate into and through correspondingly located apertures 54 on the bench gasket and aligned apertures 56 in the element enclosure tray lip 32.
  • the bench gasket rests on lip 32.
  • the locating pins are threaded to enable them to be engaged by correspondingly threaded nuts 58 for positioning below the enclosure tray.
  • nuts When the nuts are engaged with the locating pins and screwed upwardly, this causes the assembly components described above to come into abutment with each other.
  • the lower tray approaches the element and urges it via the cradles against the underside of the cooking plate, this places the insulating layer 34 under compression. As a result of the compression, some of the frangible fibres in the insulating layer break.
  • Cooking plate 46 has four facets 64 sloping to a central drain aperture 66 leading into a drain pipe 68.
  • the drain pipe is fitted to pass through correspondingly located apertures in support layer 36, insulating layer 34, enclosure tray 24 and assembly clamp 12. It drains liquid from the cooking surface to a receptacle in the housing, or to a drainage installation leading to a grease trap or other waste disposal apparatus (not shown).
  • Additional nuts 60 enable fastening of the element enclosure sub-assembly described above to the assembly clamp, so as to grip the housing bench-top 72, as illustrated in the cross sectional diagram of Figure 2.
  • the nuts hold assembly clamp 12 up against the underside 76 of the bench, pulling cooking plate 46 down firmly on to the upper surface of the bench top.
  • a copper or other suitable coating may be applied to the underside of the plate. This result may be obtained by known techniques, such as fusing or electroplating.
  • silica textile it preferably has a Si0 2 content of at least 70% by mass, further preferably 95% or more by mass.
  • the frangible fibres comprise at least 72% by mass silica as Si0 2 .
  • the frangible fibres comprise silica in the range from 90% to 98% by mass.
  • the entire inside, including floor and internal side surfaces of the element enclosure are preferably well insulated with a high performance insulation sheet of the kind described above. This is to ensure that as much as possible of the heat emitted from the element is trapped in the enclosure zone below it, which is bounded by the keeper plate and the sides of the enclosure tray, and is allowed to escape upward through the cooking plate only, achieving maximum efficiency in the use of the supplied energy.
  • the barrier sheet in other embodiments is therefore cut appropriately, preferably to fit not only over the floor of the enclosure or containment tray, but also up the adjacent sloping side walls until meeting the underside of the cooking plate periphery.
  • the element keeper ensures maximum surface contact of the element against the under-surface being retained, despite possible relative displacement between plate and element caused by expansion or contraction from change of temperature.
  • the cooking plate may have different shapes and food-containment formations, wall inclines lip profiles and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)

Abstract

L'invention concerne un appareil de cuisson électrique et un procédé d'augmentation d'utilisation de chaleur au niveau de la surface de cuisson d'un tel appareil, en améliorant la propagation de chaleur, une couche compressible étant placée contre un élément de chauffage électrique en vue de la pousser contre le côté inférieur d'une plaque de cuisson à chauffer. L'appareil est conçu pour une utilisation extérieure et, en particulier, une utilisation dans des zones publiques telles que des installations de pique-nique publiques et des terrains de camping.
PCT/IB2017/051842 2016-03-31 2017-03-31 Appareil de cuisson et procédé d'assemblage Ceased WO2017168376A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2017243978A AU2017243978A1 (en) 2016-03-31 2017-03-31 Cooking apparatus and method of assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUAU2016901199 2016-03-31
AU2016901199A AU2016901199A0 (en) 2016-03-31 Cooking apparatus and method of assembly

Publications (1)

Publication Number Publication Date
WO2017168376A1 true WO2017168376A1 (fr) 2017-10-05

Family

ID=59963598

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/051842 Ceased WO2017168376A1 (fr) 2016-03-31 2017-03-31 Appareil de cuisson et procédé d'assemblage

Country Status (2)

Country Link
AU (1) AU2017243978A1 (fr)
WO (1) WO2017168376A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200370758A1 (en) * 2017-11-22 2020-11-26 Chad Michael Cusimano Cooking Appliance With Integral Drain

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2627965A (en) * 2023-03-09 2024-09-11 Active Food Systems Ltd Cooking appliance

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356561A (en) * 1962-11-07 1967-12-05 Haveg Industries Inc Glass fiber mats
US3632983A (en) * 1970-10-13 1972-01-04 Gen Electric Smooth surfaced, heated cooktop
US4410793A (en) * 1980-09-09 1983-10-18 Karl Fischer Electric hotplate
US6855298B2 (en) * 1998-12-08 2005-02-15 Unifrax Corporation Amorphous non-intumescent inorganic fiber mat for low temperature exhaust gas treatment device
US20070257021A1 (en) * 2006-05-02 2007-11-08 Barnstead/Thermolyne Corporation Hot plate with stainless steel top

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356561A (en) * 1962-11-07 1967-12-05 Haveg Industries Inc Glass fiber mats
US3632983A (en) * 1970-10-13 1972-01-04 Gen Electric Smooth surfaced, heated cooktop
US4410793A (en) * 1980-09-09 1983-10-18 Karl Fischer Electric hotplate
US6855298B2 (en) * 1998-12-08 2005-02-15 Unifrax Corporation Amorphous non-intumescent inorganic fiber mat for low temperature exhaust gas treatment device
US20070257021A1 (en) * 2006-05-02 2007-11-08 Barnstead/Thermolyne Corporation Hot plate with stainless steel top

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200370758A1 (en) * 2017-11-22 2020-11-26 Chad Michael Cusimano Cooking Appliance With Integral Drain
US12044413B2 (en) * 2017-11-22 2024-07-23 Chad Michael Cusimano Cooking appliance with integral drain

Also Published As

Publication number Publication date
AU2017243978A1 (en) 2018-09-20

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