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Publication of SI9200315BpublicationCriticalpatent/SI9200315B/en
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
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Chemical & Material Sciences
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Engineering & Computer Science
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Ceramic Engineering
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Resistance Heating
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Electric Stoves And Ranges
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Abstract
The radiation heating element (11) has a heating conductor (18a,18b) supported by an insulating carrier (14) beneath the glass ceramics surface (12) of the hob. The heating conductor (18a,18b) has a high surface to mass ratio, the mass of the heating conductor (18a,18b) to its electrical power being less than 7.10 power(-3) gamma per Watt. Pref. the heating conductor (18a,18b) comprises a number of individual wires connected in parallel, forming a loose mesh. The individual wires may have a circular, or flat, cross-section.
Claims (16)
Patentni zahtevki 1. Sevalni grelni vodnik električnega, atmosferi izpostavljenega sevalnega grela (11), ki mora biti za ogrevanje plošče (12), posebno plošče iz steklene keramike, nameščeno na izolacijskem nosilcu (14) v odmiku od plošče (12), pri čemer ima v glavnem prosto sevajoč grelni vodnik glede na konfiguracijo z enojno okroglo žico zvišano razmerje površine glede na maso, označen s tem, daje razmerje mase grelnega vodnika (18a, 18b) proti njegovi nazivni moči manjše kot 7.10‘3 gramov na vvatt (g/W) in grelni vodnik (18a, 18b) obstoji iz velikega števila mrežasto razmeščenih posamičnih vodnikov (20).Patent Claims 1. A heating electric conductor electric, an atmosphere of an exposed radiant heater (11), which is to be placed on the insulating support (14) away from the plate (12) for heating the plate (12), in particular glass ceramic plates preferably a free-flowing conductor of the heating conductor according to the configuration with a single round wire increases the ratio of the area by weight, characterized in that the mass ratio of the heating conductor (18a, 18b) to its nominal power is less than 7.10'3 grams per vwatt (g / W) and the heating conductor (18a, 18b) consists of a large number of mesh-disposed individual conductors (20).2. Grelni vodnik po zahtevku 1, označen s tem, da sestoji iz prepleta posamičnih vodnikov (20) ali več vzporedno medsebojno potekajočih posamičnih vodnikov (20). prednostno iz cevastega prepleta.The heating conductor according to claim 1, characterized in that it consists of a bundle of individual conductors (20) or more parallel to each other interconnecting conductors (20). preferably from a tubular interlace.3. Grelni vodnik po enem izmed zahtevkov 1 ali 2, označen s tem, da so posamični vodniki (20) druga proti drugi s površinsko oksidacijo izolirane žice.The heating conductor according to one of the claims 1 or 2, characterized in that the individual conductors (20) are each other with the surface oxidation of the insulated wire.4. Grelni vodnik po enem izmed predhodnih zahtevkov, označen s tem, da je grelni vodnik (18a, 18b) pritrjen z notranjo ali zunanjo pritrdilno strukturo, ki je v obliki vijačnice (22, 24) in kije v danih pogojih zasidrana v izolacijskem nosilcu (14).The heating conductor according to one of the preceding claims, characterized in that the heating conductor (18a, 18b) is secured with an internal or external fastening structure, which is in the form of a helix (22, 24) and which, under given conditions, is anchored in an insulating support (14).5. Grelni vodnik po enem izmed predhodnih zahtevkov, označen s tem, da mreža obsega zanke (21) s prosto ploskvijo, ki je vsaj pol tako velika, prednostno pa večja, kot le-ta od posamičnih vodnikov (20) zavzeta delna ploskev mreže.A heating guide according to one of the preceding claims, characterized in that the mesh comprises a loop (21) with a free surface, which is at least half as large, and preferably larger than the partial surface of the grid engaged by the individual conductors (20) .6. Grelni vodnik po enem od predhodnih zahtevkov, označen s tem, daje izoblikovan kot votli vodnik.A heating guide according to one of the preceding claims, characterized in that it is formed as a hollow conductor.7. Sevalni grelni vodnik po uvodnem delu zahtevka 1, označen s tem, daje razmerje λ mase grelnega vodnika proti njegovi nazivni moči manjše od 7.10' gramov na \vatt (g/W) in je grelni vodnik kot zvalovljena ploska žica nameščen stoječe na izolimem nosilcu (14).7. The heating conductor according to the introductory part of claim 1, characterized in that the ratio of the mass of the heating conductor to its nominal power is less than 7.10 'grams per watt (g / w) and the heating conductor is positioned as a flat-rolled flat wire on the insulation to the carrier (14).8. Sevalni grelni vodnik po zahtevku 7, označen s tem, daje zvalovljeni grelni vodnik na izolimem nosilcu (14) nameščen meandrasto ali spiralno.A radiant heating conductor according to claim 7, characterized in that the scratched heating conductor is mounted on the insulator (14) by means of a meander or spiral.9. Grelni vodnik po enem izmed predhodnih zahtevkov, označen s tem, daje samo del celotnega ogrevanja sevalnega grela (11) oblikovan kot grelni vodnik (18a, 18b) z nizkim razmerjem masa/nazivna moč.Heat conductor according to one of the preceding claims, characterized in that only a part of the total heating of a radiant heater (11) is formed as a low mass ratio / rated power cable (18a, 18b).10. Grelni vodnik po enem izmed predhodnih zahtevkov, označen s tem, da specifična površinska obremenitev, merjena v vvattih na kvadratni centimeter (W/cm2), grelnega vodnika (18a, 18b) v glavnem ustreza tisti za enako končno temperaturo izvedenega posamičnega masivnega grelnega vodnika z okroglim presekom.Heat conductor according to one of the preceding claims, characterized in that the specific surface load measured in vials per square centimeter (W / cm2) of the heating conductor (18a, 18b) generally corresponds to that for the same final temperature of the individual solid heater a circular conductor.11. Grelni vodnik po enem izmed predhodnih zahtevkov, označen s tem, daje pretežni del površine grelnega vodnika (18a, 18b) nameščen tako, da prosto seva.A heating conductor according to one of the preceding claims, characterized in that the predominant part of the surface of the heating conductor (18a, 18b) is arranged to freeze.12. Grelni vodnik po enem izmed predhodnih zahtevkov, označen s tem, da ima grelni vodnik (18a, 18b), kije glede na enostavno naleganje na izolacijskem telesu (14) izpo- '3' stavljen zvišanemu odvajanju toplote proti izolacijskemu telesu, npr. z delno vložitvijo vsake vijačnice oz. z drugimi toplotnimi mostiči, ki so predvideni v kratkih medsebojnih razmikih, razmerje masa/nazivna moč manjše kot 5.10'3 gramov na watt (g/W).A heating conductor according to one of the preceding claims, characterized in that the heating conductor (18a, 18b) has, in the case of a simple fit on the insulating body (14), exposed to an elevated heat dissipation against the insulating body, e.g. by partially inserting each helix or with other thermal bridges provided for at short intervals, the mass ratio / rated power is less than 5.10'3 grams per watt (g / W).13. Grelni vodnik po enem izmed predhodnih zahtevkov, označen s tem, da se njegova žarilna temperatura v stacionarnem stanju nahaja nad 1300 K in prednostno pod 1600 K.A heating guide according to one of the preceding claims, characterized in that its fired temperature in stationary state is located above 1300 K and preferably below 1600 K.14. Sevalni grelni vodnik po enem izmed zahtevkov 7 do 13, označen s tem, da razmerje širine proti debelini ploske žice ni manjše od 10.A heating conductor according to one of claims 7 to 13, characterized in that the width-to-thickness ratio of the flat wire is not less than 10.15. Sevalni grelni vodnik po uvodnem delu zahtevka 1, označen s tem, daje razmerje mase grelnega vodnika (18a, 18b) proti njegovi nazivni moči manjše od 7.10'3 gramov na watt (g/W) in da grelni vodnik (18a, 18b) obstoji iz zlitine železo-krom-aluminij z deležem aluminija nad 4%, prednostno pa približno 5%.15. A heating conductor according to the introductory part of claim 1, characterized in that the mass ratio of the heating conductor (18a, 18b) to its nominal power is less than 7.10'3 grams per watt (g / W) and that the heating conductor (18a, 18b ) consists of an alloy of iron chromium-aluminum with an aluminum content of more than 4% and preferably about 5%.16. Sevalno grelo z grelnim vodnikom (18a, 18b) po enem izmed predhodnih zahtevkov.16. Heated by means of a heating conductor (18a, 18b) according to one of the preceding claims.
SI9200315A1991-11-131992-11-12Electric heating conductor for infrared heating element
SI9200315B
(en)