EP0098391B1 - Plaque de cuisson électrique - Google Patents
Plaque de cuisson électrique Download PDFInfo
- Publication number
- EP0098391B1 EP0098391B1 EP83105515A EP83105515A EP0098391B1 EP 0098391 B1 EP0098391 B1 EP 0098391B1 EP 83105515 A EP83105515 A EP 83105515A EP 83105515 A EP83105515 A EP 83105515A EP 0098391 B1 EP0098391 B1 EP 0098391B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooking plate
- heating resistor
- slots
- plate body
- wire
- 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.)
- Expired
Links
Images
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 Koch.platten redesign according to the preamble of independent claim 1 or 2, which has a substantially closed cooking surface, which is heated by at least one electric heater, the hotplate body consists of metallic sintered material.
- An electric hotplate according to the preamble of claims 1 and 2 is known from DE - A-1 765 260 and GB-A-2 077 560. While in GB-A-2 077 560 the heating resistor is formed from an uncoiled straight wire, in DE-A-1 765 260 the heating resistor consists of a serpentine ribbon or wire.
- the object of the invention is to produce a hotplate with a relatively low material thickness, which contributes to shortening the heating-up time and to a low energy consumption when it comes to short-term heating processes.
- a hotplate made of sintered material 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 based on iron powder, so that the desired properties, for example corrosion resistance, can be achieved. It is also possible that, by the arrangement in different layers with low consumption of high quality alloy - constituents to obtain a surface protection.
- spiral grooves and ribs can be so narrow because of the precision of the sintering and the plate can be made so thin that its mass and heat capacity are considerably reduced. Inverted, only slightly wavy wires or tapes and strands are used as radiators, which can absorb slight differences in elongation.
- a particularly dense and mechanically strong sintered material is created when pressed under vacuum.
- FIG. 4 shows the section through an electric hotplate 11m, the hotplate body 12m of which 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 a ring edge 19m which stands down and on the outer surface of which an installation ring (not shown) can be pressed tightly.
- 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 is produced by first winding the wire in a spiral 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 17m are embedded in the grooves in an investment compound 42, which consists of an electrically insulating powdery bulk material, which is compressed during manufacture 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 are required for a 7-stroke switchable hotplate, these three heating resistors can be rotated a total of five times in parallel spirally guided grooves, resulting in a total of five leads ten parallel grooves in an arrangement corresponding to a three-start spiral.
- protective gas should preferably be used. It is advantageously possible to change the material composition in layers, for example in the area of the outer surfaces to use mechanically particularly dense and therefore less break-sensitive materials, so that a sandwich body is produced. It is also possible to use materials protected against corrosion after sintering on the outer sides, in particular the upper side.
- 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.
- This method ensures that the grooves are free of any unwanted protrusions and that they have a precisely specified 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 also be reduced to almost half, i.e. H. preferably 3.5 mm, and the plate thickness, i.e. 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 into very narrow grooves in all types of hotplates of various materials and different manufacturing methods without the risk of them tearing or coming into contact with the hotplate body if there are differences in thermal expansion.
Landscapes
- Cookers (AREA)
- Resistance Heating (AREA)
- Massaging Devices (AREA)
- General Induction Heating (AREA)
- Baking, Grill, Roasting (AREA)
- Insulated Conductors (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Table Devices Or Equipment (AREA)
Claims (5)
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 EP0098391A1 (fr) | 1984-01-18 |
EP0098391B1 true 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)
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 |
Family Cites Families (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1075817B (de) * | 1960-02-18 | VEB Elektrowärme Sornewitz, Coswig (Bez Dresden) | Verfahren zur Befestigung des Uberfallrandes an elektrisch beheizten Koch platten | |
US560588A (en) * | 1896-05-19 | Electric rheostat or heater | ||
DD31112A (fr) * | ||||
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 |
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. |
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 |
DE1256811B (de) * | 1962-06-27 | 1967-12-21 | Siemens Elektrogeraete Gmbh | Elektrische, durch Anwendung des Fliesspressverfahrens aus Stahlblech hergestellte Kochplatte |
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 |
SE332668B (fr) * | 1967-04-28 | 1971-02-15 | Husqvarna Vapenfabriks Ab | |
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 |
DE2104677B2 (de) * | 1971-02-02 | 1973-01-04 | Siemens-Electrogeraete Gmbh, 1000 Berlin U. 8000 Muenchen | Elektrische Heizeinrichtung |
US4002883A (en) * | 1975-07-23 | 1977-01-11 | General Electric Company | Glass-ceramic plate with multiple coil film heaters |
US4481407A (en) * | 1980-05-12 | 1984-11-06 | Stokes (Australasia) Limited | Electric hotplate |
DE3027998A1 (de) * | 1980-07-24 | 1982-02-25 | Fischer, Karl, 7519 Oberderdingen | Elektrische kochplatte mit einem ueberhitzungsschutzschalter |
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 |
-
1982
- 1982-06-23 DE DE19823223417 patent/DE3223417A1/de not_active Withdrawn
-
1983
- 1983-06-03 DE DE8383105515T patent/DE3374643D1/de not_active Expired
- 1983-06-03 AT AT83105515T patent/ATE30999T1/de not_active IP Right Cessation
- 1983-06-03 EP EP83105515A patent/EP0098391B1/fr not_active Expired
- 1983-06-17 YU YU01347/83A patent/YU134783A/xx unknown
- 1983-06-20 AU AU15945/83A patent/AU570636B2/en not_active Ceased
- 1983-06-21 US US06/506,539 patent/US4504731A/en not_active Expired - Fee Related
- 1983-06-22 ES ES1983281241U patent/ES281241Y/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ATE30999T1 (de) | 1987-12-15 |
EP0098391A1 (fr) | 1984-01-18 |
DE3223417A1 (de) | 1983-12-29 |
AU570636B2 (en) | 1988-03-24 |
ES281241Y (es) | 1985-10-01 |
AU1594583A (en) | 1984-01-05 |
US4504731A (en) | 1985-03-12 |
ES281241U (es) | 1985-02-16 |
YU134783A (en) | 1985-12-31 |
DE3374643D1 (en) | 1987-12-23 |
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Inventor name: FISCHER, KARL |
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