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WO1996012388A1 - Element de cuisiniere - Google Patents

Element de cuisiniere Download PDF

Info

Publication number
WO1996012388A1
WO1996012388A1 PCT/SE1995/001186 SE9501186W WO9612388A1 WO 1996012388 A1 WO1996012388 A1 WO 1996012388A1 SE 9501186 W SE9501186 W SE 9501186W WO 9612388 A1 WO9612388 A1 WO 9612388A1
Authority
WO
WIPO (PCT)
Prior art keywords
building element
heating unit
slab
element according
recess
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/SE1995/001186
Other languages
English (en)
Inventor
Lennart W. Castwall
Christer C. I. Wiss
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 AU37150/95A priority Critical patent/AU3715095A/en
Publication of WO1996012388A1 publication Critical patent/WO1996012388A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the present invention relates to a building element for a domestic cooking range fitted with a ceramic glass hob, wherein the building element includes an insulating plate or slab which is provided in its upwardly facing main side with a measurement-adapted open recess for receiving a correspond ⁇ ing heating unit forming part of the building element.
  • heating units such as electric heating plates, heating spirals or the like in a domestic cooking range
  • a building element has the form of a basin made of insulating ceramic material which embraces the heating unit or units placed in the basin, and is lined externally with stabilizing sheet-metal.
  • the building element is dimensioned in accor ⁇ dance with the measurements of its separate associated heating unit, which means that building elements of mutually different dimensions must be provided.
  • Each building element is fitted separately to the undersurface of the ceramic glass hob and there secured in some appropriate way, for instance with the aid of metal bracket connections. Electric wires or cables extend from the heating unit in respective basins to a related range operating knob.
  • the wires are drawn to the knob at least partially unprotected.
  • the ceramic material in each building element is relatively thin and is easily damaged during transportation, although the risk of damage is reduced considerably by the protective plate on the underside of the basin.
  • the plate forms a part of the building element when fitting said element in the range.
  • the building elements are normally sorted and packaged in accordance with size prior to their transportation.
  • the thin wires or filaments that may form a heating unit in a building element intended for a domestic cooking range provided with a ceramic glass hob must be well-protected with special packaging material. Different types of heating filaments are generally used in building elements of the kind intended here (see for instance U.S. Patent No. 3,833,793 and EP 0 266 115). These filaments lie with one side in direct contact with an insulating support surface. As the filaments are heated, the insulating support surface affords a certain cooling effect which reduces the speed at which the filaments are heated.
  • This cooling effect is particularly noticeable when using a thin sintered KANTHAL ® filament as a heating unit.
  • a filament of this kind can be heated quickly to very high temperatures and in order to achieve the best possible performance, it is absolutely necessary that the filament environment will not give rise to undesirable cooling effects.
  • rapid cooling of the filament may also be desirable, for corre ⁇ sponding reasons, for instance when wishing to lower the temperature of the filament.
  • one object of the present invention is to provide a building element which substantially decreases the aforesaid cooling effects and which enables a heating unit to be heated and cooled rapidly. Because the heating units and the wires included in the building element are very sensitive to impact, it is also important to ensure that the building element is well-protected when transported. In accordance with the invention, this protection is afforded by virtue of the fact that the building element has a thickness which in itself constitutes a durable transporta ⁇ tion safeguard.
  • the building element shall be of relatively light construction and it shall be possible to arrange the heating unit/units and electric wires well-protected in the insulating ceramic material.
  • heating units and wires When transporting the new building elements, it is advantageous to position said elements in relation to one another so that heating units and wires will always be surrounded by the actual containment material.
  • the possibility of incorporating a plurality of heating units in one single building element in accordance with the invention also facilitates the assembling of a domestic cooking range, since a building element need now only be fixed relative to the ceramic glass hob, whereas in the earlier known case it was necessary to affix perhaps four separate building elements for each heating unit.
  • the novel inventive building element is mainly characterized in that the heating unit consisting of a heating filament rests with a small abutment surface on a projection which is upstanding from the bottom of the recess, wherein the slab includes at least one channel which is intended to accommo ⁇ date electric wires which are intended for connection to the heating unit and for the remote control of said unit and which extend from each recess to one of the remaining sides of the plate.
  • Fig. 1 illustrates one embodiment of a novel inventive building element from above
  • Fig. 2 is a sectional view of the building element shown in Fig. l taken on the line A-A, said building element being shown installed in a schematically and only partially indicated domestic cooking range;
  • Fig. 3 is a sectional view of part of a building element, wherein a special heating arrangement is illustrated in relation to adjacent range parts.
  • the building element illustrated in Fig. 1 includes a base unit in the form of a slab 10 consisting of an insulating, ceramic encasement material.
  • the slab 10 is rectangular in shape and the measurements of said slab are adapted to the horizontal cross-section of the cooking range.
  • the slab is suitably made of aluminium oxide. This material is light in weight and somewhat brittle, although the slab 10 will nevertheless be relatively strong mechanically, due to its thickness.
  • the fact that the material is also well-suited to function as a transportation packaging medium, as before mentioned, is to a large part due to the relatively large thickness of the material.
  • the novel building element shown in Fig. 1 includes four heating units 12, 14, 16, 18 in three different sizes, said units being arranged in corresponding recesses 20, 22, 24, 26 in the ceramic slab 10.
  • the heating units 14, 18 are mutually of the same size.
  • each heating unit 12, 14, 16, 18 is comprised of a thin sintered SUPERKANTHAL ® filament, which is relatively brittle when cold.
  • the filament patterns are shown clearly in the Figure. The filaments are very light in weight and have the advantage of retaining their form without weighting down the light encasement material in any way.
  • Fig. 2 illustrates the novel building element in more detail and shows the element fitted in a domestic cooking range 28 equipped with a ceramic glass hob 30.
  • the Figure shows the upper parts 32, 34 of two mutually opposing sheet-metal side walls of the range 28.
  • the side walls include an upper stiffening frame part 36.
  • the frame part 36 is provided with an inwardly facing flange 38, on which the ceramic glass hob 30 is placed.
  • Extending between the adjacent side edges of the frame part 36 and the hob 30 is a thin silicone layer 40 which functions to seal and affix the hob 30.
  • the novel building element is fitted immediately beneath the hob 30, said building element being pressed in between mutually abutting and inwardly facing side edges 42 of the flange 38.
  • a metal bracket means 44 which is attached to the flange 40 and abuts with the underside of the building element, so as to press said element lightly against the ceramic glass hob 30.
  • the building element illustrated in Fig. 2 has two recesses 20, 24 provided in the upwardly facing main side thereof, each of these recesses accommodating a corresponding heating unit 12 and 16 respectively.
  • the measurements of respective recesses 20, 22, 24, 26 are adapted to the measurements of respective corresponding heating units 12, 13, 16, 18, so as to provide a suitable clearance between the inner surface of a recess and the juxtaposed heating element, and between the heating element 12, 14, 16, 18 and the upper side of the building element, i.e. the side that faces towards the hob 30.
  • the slab 10 consisting of insulating, ceramic encasement material has essentially the same thickness over the major part of its extension. This is made possible by providing the underside of the slab 10 with elevated parts 46, 48 centrally opposite the respective recesses 20 and 24. This arrangement provides a saving in material while enabling the total weight of the slab 10 to be kept down without jeopardizing its mechanical strength.
  • Each heating unit 12, 14, 16, 18 rests on a plurality of raised parts 50 which constitute part of the material in the ceramic slab 10.
  • the raised parts or projections 50 are conveniently disposed in mutually parallel relationship transversely across the bottom of respective recesses 20, 22, 24, 26.
  • the projections 50 may either be continuous or discontinuous. In this latter case, the projections support- ing a respective heating unit are disposed in mutually spaced relationship along the same line.
  • Each heating unit 12, 13, 16, 18 rests on its projections 50 in respective recesses 20, 22, 24, 26 and is also affixed in relation to said projections. This is achieved with the aid of wire U-shaped fasteners 52 which lock the SUPERKANTHAL ® filaments firmly in relation to the projections 50.
  • two electric wires 54, 56 are drawn from each heating unit 12, 14, 16, 18 for the purpose of enabling said units to be remotely controlled.
  • the two wires 54, 56 extend through a passage which, in the illustrated case, has an upwardly open part 58 which extends in towards the centre of the building element and which then passes transversely through the ceramic slab 10 and opens out at its underside.
  • the electric wires 54, 56 will pass out into the protected free space 60 between the elevated parts 46, 48 resting on the plate 44.
  • the wires 54, 56 can then be led to a desired place of connection (not shown) without risk of being damaged.
  • Fig. 3 illustrates a special arrangement of heating units 62, 64 which is advantageous in certain cases.
  • the Figure is a view of part of a novel building element fitted in a partial ⁇ ly indicated domestic cooking range 66.
  • the range includes a glass hob 68, an insulating plate or slab 70, and a bottom plate 72.
  • the insulating slab 70 includes recesses 74 in which the two separate heating units 62 and 64 are accommo ⁇ dated.
  • These heating units may be remotely controlled in a conventional manner and may be either series-connected or parallel-connected.
  • the lower heating unit 62 rests on a plurality of upstanding parts or projections 76.
  • the unit is also fixed in relation to said projections with the aid of U-shaped fastener means 78.
  • an intermediate sheet is placed above the heating unit 62.
  • This intermediate sheet has the form of a grid-like spacer provided with projections 80 which are similar to the projections 76 in all essentials.
  • the projections 76, 80 have the form of longitudinally extending ridges which extend parallel with one another transversely across the recess 74.
  • the heating unit 64 is placed on top of the spacer.
  • the heating unit 64 is fastened to its respective projections 80 in the same way as the heating unit 62, with the aid of U-shaped wire fasteners 82.
  • a building element of the kind illustrated in Fig. 3 may be supplemented with additional heating units, which in turn may be placed above the heating unit 64. This provides a building element in which the heating units are located on several levels.
  • the ceramic plate may have a planar underside.
  • the underside of the ceramic plate can be strengthened with a thin metal sheet or with thin metal strips.
  • the elevated parts located in the recesses can be formed in many different ways. It is also feasible to allow an upper heating unit to rest on elevations which extend from the bottom of a recess to a point beyond a lower heating unit. A separate hole may also be provided for each wire connected to a heating unit.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)

Abstract

Un élément constitutif d'une cuisinière domestique (28; 66) comprend une plaque vitrocéramique (30), ainsi qu'une dalle isolante (10) qui présente sur sa face principale orientée vers le haut des évidements (20, 22) adaptés aux dimensions de modules chauffants (12, 16) correspondants devant s'y intégrer. Un module chauffant comprend un filament chauffant et repose sur des éléments (50) faisant saillie à partir du fond de l'évidement sur une petite surface de butée. Cette dalle (10) comporte au moins un passage (58) recevant des fils électriques (54, 56) chargés d'alimenter et commander le module chauffant (12, 16), ces fils partant de chaque évidement (24) vers un des autres côtés de la dalle (10; 70).
PCT/SE1995/001186 1994-10-14 1995-10-13 Element de cuisiniere Ceased WO1996012388A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU37150/95A AU3715095A (en) 1994-10-14 1995-10-13 Unit for a kitchen range

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9403517A SE9403517D0 (sv) 1994-10-14 1994-10-14 Byggelement för hushållsspis
SE9403517-7 1994-10-14

Publications (1)

Publication Number Publication Date
WO1996012388A1 true WO1996012388A1 (fr) 1996-04-25

Family

ID=20395619

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/001186 Ceased WO1996012388A1 (fr) 1994-10-14 1995-10-13 Element de cuisiniere

Country Status (3)

Country Link
AU (1) AU3715095A (fr)
SE (1) SE9403517D0 (fr)
WO (1) WO1996012388A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325604A (en) * 1997-05-22 1998-11-25 Ceramaspeed Ltd Electric heater support insulation

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640906A (en) * 1949-06-02 1953-06-02 Clyde H Haynes Electrical heating device
US3833793A (en) * 1972-08-05 1974-09-03 J Hughes Electrical cooker unit for a ceramic glass plate type electrical cooker
US3912905A (en) * 1974-02-25 1975-10-14 Kanthal Corp Electric resistance heating device
US4243874A (en) * 1977-07-02 1981-01-06 Karl Fischer Radiant heating unit
US4296311A (en) * 1979-08-15 1981-10-20 The Kanthal Corporation Electric hot plate
US4371780A (en) * 1979-10-27 1983-02-01 E.G.O. Elektro-Berate Blanc U. Fischer Multi-element cooking unit with control device
EP0266115A1 (fr) * 1986-10-25 1988-05-04 Micropore International Limited Radiateurs chauffants
US4810857A (en) * 1986-07-03 1989-03-07 E.G.O. Elektro-Gerate Blanc U. Fischer Radiant heater unit
DE3820691A1 (de) * 1988-06-18 1989-12-21 Ako Werke Gmbh & Co Strahlungsheizkoerper
DE3908600A1 (de) * 1989-03-16 1990-09-20 Ako Werke Gmbh & Co Strahlungsheizeinrichtung

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640906A (en) * 1949-06-02 1953-06-02 Clyde H Haynes Electrical heating device
US3833793A (en) * 1972-08-05 1974-09-03 J Hughes Electrical cooker unit for a ceramic glass plate type electrical cooker
US3912905A (en) * 1974-02-25 1975-10-14 Kanthal Corp Electric resistance heating device
US4243874A (en) * 1977-07-02 1981-01-06 Karl Fischer Radiant heating unit
US4296311A (en) * 1979-08-15 1981-10-20 The Kanthal Corporation Electric hot plate
US4371780A (en) * 1979-10-27 1983-02-01 E.G.O. Elektro-Berate Blanc U. Fischer Multi-element cooking unit with control device
US4810857A (en) * 1986-07-03 1989-03-07 E.G.O. Elektro-Gerate Blanc U. Fischer Radiant heater unit
EP0266115A1 (fr) * 1986-10-25 1988-05-04 Micropore International Limited Radiateurs chauffants
DE3820691A1 (de) * 1988-06-18 1989-12-21 Ako Werke Gmbh & Co Strahlungsheizkoerper
DE3908600A1 (de) * 1989-03-16 1990-09-20 Ako Werke Gmbh & Co Strahlungsheizeinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325604A (en) * 1997-05-22 1998-11-25 Ceramaspeed Ltd Electric heater support insulation

Also Published As

Publication number Publication date
SE9403517D0 (sv) 1994-10-14
AU3715095A (en) 1996-05-06

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