EP0098391A1 - Plaque de cuisson électrique - Google Patents

Plaque de cuisson électrique Download PDF

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Publication number
EP0098391A1
EP0098391A1 EP83105515A EP83105515A EP0098391A1 EP 0098391 A1 EP0098391 A1 EP 0098391A1 EP 83105515 A EP83105515 A EP 83105515A EP 83105515 A EP83105515 A EP 83105515A EP 0098391 A1 EP0098391 A1 EP 0098391A1
Authority
EP
European Patent Office
Prior art keywords
hotplate
electric
grooves
heating resistor
sintered material
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.)
Granted
Application number
EP83105515A
Other languages
German (de)
English (en)
Other versions
EP0098391B1 (fr
Inventor
Karl Fischer
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer GmbH
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 EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT83105515T priority Critical patent/ATE30999T1/de
Publication of EP0098391A1 publication Critical patent/EP0098391A1/fr
Application granted granted Critical
Publication of EP0098391B1 publication Critical patent/EP0098391B1/fr
Expired legal-status Critical Current

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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
    • H05B3/70—Plates of cast metal

Definitions

  • the invention relates to an electric hotplate with a hotplate body having a substantially mariossene cooking surface that an electric heater is heated from at least the cooking p lath body sintered from metallic material.
  • German patent applications P 30 33 828.4 and P 30 49 521 it has already been proposed to use a plate-shaped hotplate body which has tubular heating elements with a triangular cross-section pressed on the underside instead of the heating coil inserted in grooves.
  • the hotplate body is very easy to manufacture, but it is necessary to subsequently install the tubular heating element and to provide it with insulation which presses it onto the underside of the hotplate body.
  • the object of the invention is to further develop the main patent T i the sense of ease of manufacture.
  • the possibility of producing the hotplate with a relatively low material thickness contributes to a shortening of the heating-up time and to a low energy consumption when it comes to short-term heating processes.
  • a hotplate made of sintered material also has advantages in production because the sintered material can be produced with the final surface and there is no need for machining.
  • the sintered material can preferably have different material compositions in a horizontal layering. For reasons of strength and / or thermal reasons, a different material composition can be used at the top or bottom or outside or inside.
  • the sintered material can be provided with other metal additives on the basis of iron powder, so that the desired properties, for example corrosion resistance, can be achieved. It is therefore also possible to obtain surface protection by arranging them in different layers with low consumption of high-quality alloy components.
  • spiral grooves and ribs can be so narrow because of the precision of the sintering and the plate can be so thin that its mass and heat capacity are considerable is reduced.
  • Converted, slightly wavy wires or tapes as well as strands can be used as radiators, which can absorb slight differences in elongation.
  • a particularly dense and mechanically strong sintered material is created when pressed under vacuum.
  • the hotplate body 12m is made of sintered material.
  • the hotplate body 12m consists of sintered material, the material of which contains iron powder as a base and which can contain various powdery additives of different metals, such as copper, chromium, nickel, aluminum, manganese, etc.
  • the upper flat cooking surface 13 is set back somewhat in the central zone 14a and ends on the outer circumference in an outwardly directed flange 36m, in the area of which there is an annular rim 19m which stands down and on the outer surface of which an installation ring (not shown) cannot be pressed.
  • the heating of the hotplate is in the form of heating resistors 17m accommodated in spirally arranged grooves 40.
  • the grooves 40 are located on the underside of the hotplate body and are separated from one another by ribs 41 of the hotplate body 12m.
  • the depth and width of the grooves is very small and is less than 5 mm, preferably 3.5 mm.
  • the ribs can have a thickness of only 0.8 to 1 mm, so that a clear groove width of about 2.5 mm remains.
  • the heating resistors 17m are inserted into these in the form of slightly corrugated solid wires, which are therefore not used in the usual spiral shape.
  • the slight curl of the wires serves to allow the wire to adapt to any differences in elongation compared to the hotplate body. It can be made, for example, by first winding the wire in a helix shape and then not completely pulling it straight again.
  • the heating resistors from strands which consist, for example, of 3 to 5 individual wires, which are twisted or stranded with one another with a relatively small twist.
  • the heating resistors as shown in FIG. 2, from a band 17m which is also slightly corrugated and is arranged vertically in the groove 40.
  • the heating resistors 17n, n are embedded in the grooves in an investment material 42, which consists of an electrically insulating powdery bulk material, which is used in the manufacture position is thickened by pressing. Due to the small width or division of the grooves, it is possible to lay the heating resistor (s) in a large number of spiral turns. If, for example, three electrically differently switchable heating resistors are used, such as those required for a 7-stroke switchable hotplate, these three heating resistors can be put around a total of five times in parallel spiral grooves, resulting in a total of fifteen parallel grooves in an arrangement corresponding to one three-course spiral leads.
  • the hotplate has considerable advantages. They consist in an improvement in efficiency compared to conventional hotplates and in simple manufacture, largely without machining.
  • the very narrow design of the grooves and ribs is possible due to the production in the sintering process. It is first of all This method ensures that the grooves are free of any unwanted protrusions and that they have a precisely defined surface structure, so that the distance between the heating resistors and the walls of the grooves can also be exactly maintained. Sintering also has other advantages.
  • the rib height can thus also be reduced to almost half, ie preferably also 3.5 mm, and the plate thickness, ie the distance between the cooking surface 13 and the groove base, can be reduced to approximately 2.5 mm. This also reduces the height of the ring rim 19m and thus the entire hotplate to less than 15 mm. In the end, a hotplate can be produced that has only half the mass of a conventional hotplate.
  • the slight corrugation of the heating resistors makes it possible to insert a largely uncoiled wire or ribbon into very narrow grooves in all types of hot plates of various materials and different manufacturing methods, without the risk that they tear or come into contact with the hot plate body if there are differences in thermal expansion.

Landscapes

  • Resistance Heating (AREA)
  • Cookers (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Table Devices Or Equipment (AREA)
  • Insulated Conductors (AREA)
  • Baking, Grill, Roasting (AREA)
  • Massaging Devices (AREA)
  • General Induction Heating (AREA)
EP83105515A 1982-06-23 1983-06-03 Plaque de cuisson électrique Expired EP0098391B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105515T ATE30999T1 (de) 1982-06-23 1983-06-03 Elektrokochplatte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823223417 DE3223417A1 (de) 1982-06-23 1982-06-23 Elektrokochplatte
DE3223417 1982-06-23

Publications (2)

Publication Number Publication Date
EP0098391A1 true EP0098391A1 (fr) 1984-01-18
EP0098391B1 EP0098391B1 (fr) 1987-11-19

Family

ID=6166642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105515A Expired EP0098391B1 (fr) 1982-06-23 1983-06-03 Plaque de cuisson électrique

Country Status (7)

Country Link
US (1) US4504731A (fr)
EP (1) EP0098391B1 (fr)
AT (1) ATE30999T1 (fr)
AU (1) AU570636B2 (fr)
DE (2) DE3223417A1 (fr)
ES (1) ES281241Y (fr)
YU (1) YU134783A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002083A1 (fr) * 1984-10-01 1986-04-10 Exxon Research And Engineering Company Halogenation de polymeres par l'utilisation d'un coprecipitant acide
DE3911761A1 (de) * 1989-04-11 1990-10-18 Ako Werke Gmbh & Co Strahlungsheizeinrichtung
DE4229373A1 (de) * 1992-09-03 1994-03-10 Ego Elektro Blanc & Fischer Heizkörper, insbesondere für Kochgeräte
GB2293952A (en) * 1994-10-05 1996-04-10 Redring Electric Ltd A heating unit for a ceramic hob
GB2302003B (en) * 1995-06-07 2000-02-16 West Bend Co Improved heating device for a small appliance
NZ512355A (en) * 2001-06-14 2004-01-30 Auckland Uniservices Ltd Combination cooking device using electrical food resistance and heated elements
GB0518338D0 (en) * 2005-09-09 2005-10-19 Strix Ltd Heaters for liquid heating vessels

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD31112A (fr) *
GB353563A (en) * 1929-05-10 1931-07-30 Elektrisk Bureau As Improvements in or relating to electrical heating apparatus
CH150862A (de) * 1931-01-21 1931-11-30 Hofer Hans Elektrische Kochplatte.
DE1256811B (de) * 1962-06-27 1967-12-21 Siemens Elektrogeraete Gmbh Elektrische, durch Anwendung des Fliesspressverfahrens aus Stahlblech hergestellte Kochplatte
DE1765260A1 (de) * 1967-04-28 1971-07-15 Husqvarna Vapenfabriks Ab Elektrische Kochplatte
DE2104677B2 (de) * 1971-02-02 1973-01-04 Siemens-Electrogeraete Gmbh, 1000 Berlin U. 8000 Muenchen Elektrische Heizeinrichtung
GB2077560A (en) * 1980-05-12 1981-12-16 Stokes Australasia Hotplate
DE3027998A1 (de) * 1980-07-24 1982-02-25 Fischer, Karl, 7519 Oberderdingen Elektrische kochplatte mit einem ueberhitzungsschutzschalter

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US560588A (en) * 1896-05-19 Electric rheostat or heater
DE1075817B (de) * 1960-02-18 VEB Elektrowärme Sornewitz, Coswig (Bez Dresden) Verfahren zur Befestigung des Uberfallrandes an elektrisch beheizten Koch platten
US1547837A (en) * 1923-03-30 1925-07-28 Gen Electric Electrical heating element
US1645867A (en) * 1926-12-21 1927-10-18 William B Louthan Electric heating unit
US1709438A (en) * 1928-01-28 1929-04-16 Frederick W Moffat Electric heating element
US1868620A (en) * 1928-08-06 1932-07-26 Edwin L Wiegand Electrical heating unit
AT153865B (de) * 1933-12-13 1938-07-25 Siemens Ag Elektrisch beheizte Kochplatte.
CH175609A (de) * 1934-07-03 1935-03-15 Burckhardt Ag Maschf Elektrische Heizplatte.
US2195705A (en) * 1936-11-25 1940-04-02 Power Patents Co Electric heater
US2164650A (en) * 1937-01-16 1939-07-04 Rutenber Electric Company Heating plate device
US2290901A (en) * 1940-04-22 1942-07-28 Liberty Electric Company Electric heating element
US2260165A (en) * 1940-06-06 1941-10-21 Edwin L Wiegand Heating means
US2359983A (en) * 1941-02-19 1944-10-10 Gen Motors Corp Domestic appliance
DE962920C (de) * 1941-02-27 1957-05-02 Siemens Ag Elektrische Waermeleitungskochplatte
DE896966C (de) * 1941-03-30 1953-11-16 Siemens Ag Ringfoermig beheizte elektrische Kochplatte
FR880865A (fr) * 1941-03-31 1943-04-07 Dispositif de chauffage
US2409244A (en) * 1943-11-05 1946-10-15 Bilan John Glass electric hot plate
US2664492A (en) * 1949-02-09 1953-12-29 Fischer Karl Heating plate structure
US2691717A (en) * 1950-12-30 1954-10-12 Knapp Monarch Co Electrical appliance heater
CH321446A (fr) * 1954-09-23 1957-05-15 Brev Et Procedes Pyror S A Procédé de fabrication d'une plaque chauffante électrique et plaque chauffante obtenue par ce procédé
US2851572A (en) * 1957-05-13 1958-09-09 Raybestos Manhattan Inc Heating unit
US3221203A (en) * 1962-06-01 1965-11-30 Rca Corp Sintered metal conductor support
US3300621A (en) * 1964-04-22 1967-01-24 Fischer Karl Electric hotplate and method of making same
US3346720A (en) * 1965-05-25 1967-10-10 Gen Motors Corp Infrared surface heating unit with corrugated ribbon-shaped filament
US3621200A (en) * 1968-10-31 1971-11-16 American Packaging Corp Heating element and packaging machine equipped therewith
DE2045674A1 (de) * 1970-09-16 1972-03-23 Siemens Elektrogeraete Gmbh Elektrische Heizplatte aus Stahlblech
US4002883A (en) * 1975-07-23 1977-01-11 General Electric Company Glass-ceramic plate with multiple coil film heaters
DE3033828A1 (de) * 1980-09-09 1982-04-29 Fischer, Karl, 7519 Oberderdingen Elektrokochplatte
DE3049521A1 (de) * 1980-12-30 1982-07-29 Karl 7519 Oberderdingen Fischer Elektrischer heizkoerper

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD31112A (fr) *
GB353563A (en) * 1929-05-10 1931-07-30 Elektrisk Bureau As Improvements in or relating to electrical heating apparatus
CH150862A (de) * 1931-01-21 1931-11-30 Hofer Hans Elektrische Kochplatte.
DE1256811B (de) * 1962-06-27 1967-12-21 Siemens Elektrogeraete Gmbh Elektrische, durch Anwendung des Fliesspressverfahrens aus Stahlblech hergestellte Kochplatte
DE1765260A1 (de) * 1967-04-28 1971-07-15 Husqvarna Vapenfabriks Ab Elektrische Kochplatte
DE2104677B2 (de) * 1971-02-02 1973-01-04 Siemens-Electrogeraete Gmbh, 1000 Berlin U. 8000 Muenchen Elektrische Heizeinrichtung
GB2077560A (en) * 1980-05-12 1981-12-16 Stokes Australasia Hotplate
DE3027998A1 (de) * 1980-07-24 1982-02-25 Fischer, Karl, 7519 Oberderdingen Elektrische kochplatte mit einem ueberhitzungsschutzschalter

Also Published As

Publication number Publication date
ES281241Y (es) 1985-10-01
AU570636B2 (en) 1988-03-24
US4504731A (en) 1985-03-12
ATE30999T1 (de) 1987-12-15
DE3223417A1 (de) 1983-12-29
YU134783A (en) 1985-12-31
DE3374643D1 (en) 1987-12-23
EP0098391B1 (fr) 1987-11-19
AU1594583A (en) 1984-01-05
ES281241U (es) 1985-02-16

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