EP0163106A1 - Plaque de cuisson électrique - Google Patents

Plaque de cuisson électrique Download PDF

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Publication number
EP0163106A1
EP0163106A1 EP85104826A EP85104826A EP0163106A1 EP 0163106 A1 EP0163106 A1 EP 0163106A1 EP 85104826 A EP85104826 A EP 85104826A EP 85104826 A EP85104826 A EP 85104826A EP 0163106 A1 EP0163106 A1 EP 0163106A1
Authority
EP
European Patent Office
Prior art keywords
heating resistor
main heating
main
hotplate
switched
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
EP85104826A
Other languages
German (de)
English (en)
Other versions
EP0163106B1 (fr
Inventor
Felix Schreder
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
Publication of EP0163106A1 publication Critical patent/EP0163106A1/fr
Application granted granted Critical
Publication of EP0163106B1 publication Critical patent/EP0163106B1/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, on the underside of which heating resistors are embedded in inspiring turns, one of which is a main heating resistor that can be controlled by a clocking energy control device, and with an additional heating resistor that can be switched on during a heating phase and can then be switched off by a temperature or time switch.
  • Such an electric hotplate has become known from DE-OS 31 44 631.
  • the main heating resistor which contains a power in the order of magnitude of the usual maximum power of such a hotplate and is controlled by a power control device, it contains an additional heating resistor, the power of which exceeds the normal power of the hotplate, but only during the Boiling phase switched on and then switched off again by a temperature switch.
  • the hotplate is subject to very high thermal loads and, in particular at higher voltages (e.g. 380 volts), it is difficult to achieve a long-term stability of the heating which corresponds to the very high requirements for such hotplates, although the additional heating element is only switched on temporarily .
  • heating resistors are arranged in three spirally parallel grooves. They are switched by a cam switch step by step in several switch combinations in order to achieve - with the switch position "zero" - constant steps. They achieve the maximum continuous power in the highest power level, in which all heating resistors are connected in parallel, which is achieved with the main heating resistor alone in the circuit according to DE-OS 31 44 631 (FIG. 1).
  • DE-OS 31 44 631 in FIG. 2 suggests using an additional heating resistor in the form of a fourth heating resistor.
  • the object of the invention is to provide an electric hotplate which has excellent properties with regard to long-term loadability and temperature distribution.
  • each spiral turn contains three essentially parallel grooves, of which the outer one has the addition - Heating resistor and the other two each contain a main resistance part, which are connected in series to form the main heating resistor.
  • the grooves on the underside of the hotplate are thus arranged in three-start spiral turns, preferably two almost completely revolving spiral turns being provided.
  • the start and end points of the spirals are relatively close together, so that there are short connection paths.
  • the spiral is not a purely Archimedean spiral, but the outermost and innermost spiral winding runs almost on an arc and has an oblique transition in the circumferential area in which the beginning and the end of the spiral lie, with a significant change in the Center point distance over a short circumferential range. However, it is called a spiral because of the shape that runs from inside to outside (or vice versa).
  • the two main heating resistor parts can be arranged in grooves which are arranged separately from one another and can be embedded separately.
  • the main heating resistor parts lying in two parallel grooves can preferably be connected to one another at one of their adjacent ends outside their embedding, preferably by welding their connecting pins protruding from the embedding to a bridging conductor.
  • the arrangement of the heating conductors according to the invention results in an excellent long-term durability of the hotplate despite the high power load on the heating surface.
  • the use of the circumferential groove for the additional heating resistor in continuous operation could result in a special concentration on the central area of the heating surface and thus a risk of overheating. this is not the case.
  • the concentration in continuous operation leads to a particularly good efficiency, whereby it has been shown to be important that the additional heating resistor circulating between spiral windings, which is switched off in continuous operation, results in thermal relief of the heating resistors and uniform heating surface load.
  • the electric hotplate 11 shown in the drawing has a hotplate body 12 made of cast iron with an upper annular, closed, flat cooking surface 15 and a peripheral, downward-facing edge 16 in the peripheral area. It is surrounded by a mounting ring 13 which can be supported on a hotplate .
  • the central region 17 of the circular hotplate body 12 is somewhat lowered in relation to the cooking surface 15, is unheated and carries a downward screwing pin 18 in its center.
  • three spirally arranged grooves 20, 21, 22 are arranged in the form of a three-course spiral that makes almost two complete rotations.
  • Three mutually parallel grooves thus each form a turn 36.
  • the outer spiral turn runs in the form of a circle on the outer circumference, then, when it has almost completed one run, obliquely inward and the rest of the run again in the form of a circular arc around the unheated central zone 17 around, where the grooves end relatively close to each other.
  • the outer ends of the grooves are arranged in a somewhat staggered manner, the beginnings of the outer and inner grooves being relatively close to one another, while the groove 21 lying in between is set back somewhat with its beginning.
  • each groove there is a heating resistor in the form of a coil made of electrical resistance wire. It is arranged in an embedding 37, which is electrically insulating and consists of a poured and compressed mass.
  • the outer connection ends 26, 27, 28 and the inner connection ends 29, 30, 31 of the three heating resistors 23, 24, 25 are each with one connection pin 32 provided, which projects through the embedding 37 to the outside, ie downwards.
  • the groove 20 located in the outside of the spiral turns contains the heating resistor 23, which forms the additional heating resistor. It therefore runs around the outer circumference of the hotplate near the edge 16 and then inwards, with it rotating approximately in the middle of the heated area 19.
  • connection pins 32 at their inner connection ends 30, 31 are connected by a bridging conductor 33 which is welded to the connection pins 32.
  • the power distribution is such that for a hotplate with a nominal diameter of 145 mm (outer diameter on the flange 16) the additional heating resistor 23 has a power of about 700 watts and the two other heating conductors 24, 25 connected in series have a power of about 900 watts, while the heating resistor 24 has about 500 watts and the heating resistor 25 has about 400 watts.
  • a continuously manually adjustable power control device 40 with a bimetal heated depending on the load and a clocking switch controls the power of the main heating resistors 24, 25 depending on the manual setting by different relative duty cycle.
  • An upstream additional switch 41 is only closed at the highest power setting and switches on the additional heating resistor 23 in parallel with the main heating resistor 24, 25, in series with a temperature switch 34, which is arranged in the central zone of the hotplate, in order to increase the power in the heating phase to have. After boiling, the temperature switch 34 switches off the additional heating resistor 23 and the power is limited to the power of the main heating resistor 24, 25 set on the energy control device 40.
  • the temperature switch 34 is provided with a very large switching hysteresis by arrangement and / or construction, so that it does not switch on again after normal switching off at the end of the boiling phase in normal operation, that is to say has a characteristic of a time switch that could also be used.
  • a purely time switch would not be quite as suitable, however, due to the fact that the food does not influence it.
  • Leistun g sabstufun g s indicate that both Haupttogetherwiderstandsmaschine 24, 25 different power levels, have to be precise preferably inside the smaller, thereby equalizing the in the same wire size and coil density of the influence of the different lengths of the middle and inner groove 21, 22 and the heating surface load is further evened out.

Landscapes

  • Cookers (AREA)
  • Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Central Heating Systems (AREA)
EP85104826A 1984-05-12 1985-04-20 Plaque de cuisson électrique Expired EP0163106B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843417713 DE3417713A1 (de) 1984-05-12 1984-05-12 Elektrokochplatte
DE3417713 1984-05-12

Publications (2)

Publication Number Publication Date
EP0163106A1 true EP0163106A1 (fr) 1985-12-04
EP0163106B1 EP0163106B1 (fr) 1989-01-04

Family

ID=6235701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104826A Expired EP0163106B1 (fr) 1984-05-12 1985-04-20 Plaque de cuisson électrique

Country Status (4)

Country Link
EP (1) EP0163106B1 (fr)
DE (2) DE3417713A1 (fr)
ES (1) ES8608263A1 (fr)
YU (1) YU46296B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0303854A1 (fr) * 1987-08-18 1989-02-22 E.G.O. Elektro-Geräte Blanc u. Fischer Radiateur électrique
FR2682253A1 (fr) * 1991-10-07 1993-04-09 Commissariat Energie Atomique Sole chauffante destinee a assurer le chauffage d'un objet dispose a sa surface et reacteur de traitement chimique muni de ladite sole.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735265A1 (de) * 1987-10-17 1989-04-27 Ego Elektro Blanc & Fischer Kochgeraet

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR821554A (fr) * 1936-08-13 1937-12-08 Alsthom Cgee Nouveau foyer électrique de cuisson à feu vif
FR886384A (fr) * 1939-07-19 1943-10-13 Licentia Gmbh Plaque de cuisson chauffée électriquement munie à la face inférieure de nervures pour insérer la spirale de chauffage
US2419083A (en) * 1943-01-12 1947-04-15 Proctor Electric Co Electrical cooking apparatus
US2689903A (en) * 1950-06-03 1954-09-21 Cutler Hammer Inc Electric range surface heating unit
FR1221462A (fr) * 1958-03-28 1960-06-02 Plaque de cuisson électrique
DE1127007B (de) * 1958-03-28 1962-04-05 Karl Fischer Elektrisch beheizte Masse-Schnellkochplatte
EP0103741B1 (fr) * 1982-09-16 1988-11-17 E.G.O. Elektro-Geräte Blanc u. Fischer Elément chauffant, en particulier élément chauffant radiant pour le chauffage de plaques en céramique

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE614234C (de) * 1935-06-04 Ehrich & Graetz Akt Ges Kreisrunde elektrische Hochleistungskochplatte
DE643275C (de) * 1937-04-02 Ehrich & Graetz Akt Ges Elektrische Hochleistungskochplatte
DE653992C (de) * 1937-12-07 Ehrich & Graetz Akt Ges Kreisrunde elektrische Hochleistungskochplatte
DE579681C (de) * 1931-12-18 1933-06-29 Siemens Schuckertwerke Akt Ges Elektrische Kochplatte aus Metall mit hoher Heizleistung, bei der an der Unterseite der Platte zwischen Waermeleitrippen Hochleistungsheizwicklungen in Pressmasse eingebettet sind
GB447565A (en) * 1935-03-08 1936-05-21 Revo Electric Company Ltd Improvements relating to electric hot-plates
US2330867A (en) * 1940-07-08 1943-10-05 Firm Entpr S Electr Fribourgeo Electric heating plate
DE962920C (de) * 1941-02-27 1957-05-02 Siemens Ag Elektrische Waermeleitungskochplatte
FR1005100A (fr) * 1947-06-04 1952-04-07 Perfectionnements apportés aux dispositifs de chauffage électrique, notamment aux dispositifs du genre des plaques chauffantes pour usages domestiques
DE3144631A1 (de) * 1981-11-10 1983-05-26 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektrokochplatte

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR821554A (fr) * 1936-08-13 1937-12-08 Alsthom Cgee Nouveau foyer électrique de cuisson à feu vif
FR886384A (fr) * 1939-07-19 1943-10-13 Licentia Gmbh Plaque de cuisson chauffée électriquement munie à la face inférieure de nervures pour insérer la spirale de chauffage
US2419083A (en) * 1943-01-12 1947-04-15 Proctor Electric Co Electrical cooking apparatus
US2689903A (en) * 1950-06-03 1954-09-21 Cutler Hammer Inc Electric range surface heating unit
FR1221462A (fr) * 1958-03-28 1960-06-02 Plaque de cuisson électrique
DE1127007B (de) * 1958-03-28 1962-04-05 Karl Fischer Elektrisch beheizte Masse-Schnellkochplatte
EP0103741B1 (fr) * 1982-09-16 1988-11-17 E.G.O. Elektro-Geräte Blanc u. Fischer Elément chauffant, en particulier élément chauffant radiant pour le chauffage de plaques en céramique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0303854A1 (fr) * 1987-08-18 1989-02-22 E.G.O. Elektro-Geräte Blanc u. Fischer Radiateur électrique
US4931621A (en) * 1987-08-18 1990-06-05 E.G.O. Elektro-Gerate Blanc U. Fischer Electric heater
FR2682253A1 (fr) * 1991-10-07 1993-04-09 Commissariat Energie Atomique Sole chauffante destinee a assurer le chauffage d'un objet dispose a sa surface et reacteur de traitement chimique muni de ladite sole.
WO1993007550A1 (fr) * 1991-10-07 1993-04-15 Commissariat A L'energie Atomique Sole chauffante destinee a assurer le chauffage d'un objet dispose a sa surface et reacteur de traitement chimique muni de ladite sole

Also Published As

Publication number Publication date
EP0163106B1 (fr) 1989-01-04
DE3417713A1 (de) 1985-11-14
ES8608263A1 (es) 1986-06-01
YU46296B (sh) 1993-05-28
YU78385A (en) 1987-12-31
DE3567348D1 (en) 1989-02-09
ES543024A0 (es) 1986-06-01

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