EP1448024B1 - Heizungseinrichtung mit zwei Bereichen - Google Patents

Heizungseinrichtung mit zwei Bereichen Download PDF

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Publication number
EP1448024B1
EP1448024B1 EP04000818A EP04000818A EP1448024B1 EP 1448024 B1 EP1448024 B1 EP 1448024B1 EP 04000818 A EP04000818 A EP 04000818A EP 04000818 A EP04000818 A EP 04000818A EP 1448024 B1 EP1448024 B1 EP 1448024B1
Authority
EP
European Patent Office
Prior art keywords
area
power
excess temperature
heating device
temperature protection
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 - Lifetime
Application number
EP04000818A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1448024A2 (de
EP1448024A3 (de
Inventor
Eugen Wilde
Hans Mohr
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 Geratebau 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 Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to SI200430604T priority Critical patent/SI1448024T1/sl
Publication of EP1448024A2 publication Critical patent/EP1448024A2/de
Publication of EP1448024A3 publication Critical patent/EP1448024A3/de
Application granted granted Critical
Publication of EP1448024B1 publication Critical patent/EP1448024B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B3/74—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
    • 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
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to a heating device according to the preamble of claim 1 and a method for operating a heating device according to the preamble of claim 11.
  • a heating device and such a method are particularly suitable for a hotplate with a glass ceramic hob.
  • the heating time or warm-up time for radiant heaters as heating devices depends on the one hand on a adjusted glass-ceramic surface temperature and the quality of the cookware used and on the other hand on the rated power of the radiant heater and thus its power density. In many cases, it is desirable to shorten this cooking time to achieve comfortable operation and fast cooking. However, the power density of a radiant heater can not be increased to infinity. at Radiant heaters with BandMarleitern can be held at a certain power density, the heat conductor temperature is no longer within the specified limits.
  • Values for power densities in such radiant heaters are called, which represent a good compromise between the cooking time, quality of the cookware used and the heating conductor temperature.
  • An advantageous power density can be close to 8 watts / cm 2 .
  • radiant heaters with a nominal diameter of 140mm and 180mm such a power density is used successfully.
  • this power density has certain limits. From a nominal diameter of the radiator of 210mm with a theoretical 2700 watts of power, the switching capacity of the electromechanical rod controller or protection temperature limiter, which represent the protection of the glass ceramic cooktop from overheating, exceeded.
  • the switching capacity of the protection temperature limiter is at a certain current, which results from the predetermined mains voltage of 230 volts and a certain power value.
  • the US-A-4,327,280 describes a radiant heater with a round main area and a laterally adjoining additional area.
  • a rod regulator overlaps the main area as an excess temperature fuse only.
  • the additional area is not overlapped by the bar regulator and thus can not be influenced by it.
  • the EP-A-0 551 172 describes a radiant heater with three concentric heated areas.
  • a rod controller as over-temperature fuse covers all areas and extends far beyond the center, so that it is influenced by the temperature of all areas. All heating elements of the areas of the radiant heater are connected via the rod controller to a power supply, so that all areas and heating elements are monitored by the rod controller and in the event of an excess temperature at the rod controller are also switched off by this.
  • the invention has for its object to provide a heating device mentioned above and a method mentioned, with which the problems of the prior art can be avoided and in particular the size of a radiant heater regardless of the power density or a switching capacity of protection temperature limiters can be designed variable.
  • a heating device is divided into at least a first and a second region.
  • a first area can be monitored by a first over-temperature fuse.
  • This can be, for example, a rod regulator or a protective temperature limiter which at least partially overlaps or extends over this first region.
  • the first area has a maximum first power. This is matched to the above values.
  • a second area of the heater is operated without monitoring by the first overtemperature fuse.
  • the second area is operated at all without over-temperature protection. This is achieved by the maximum area coverage of the second area being approximately 2.5 watts / cm 2 .
  • the heating device is divided into two areas, so to speak.
  • a first area is operated at a critical power density and therefore must have a protection temperature limiter.
  • This first range can be chosen so large that the protective temperature limiter can just manage or switch the resulting power.
  • a second area is added. In any case, this second area is operated without monitoring by the over-temperature protection of the first area, preferably without any monitoring by an over-temperature fuse.
  • a value is chosen as power density, which is technically possible and permissible for a glass ceramic.
  • a separate over-temperature fuse could be provided for the second area. Although this would increase the effort, but also improve security.
  • the second region may rest against the first region, advantageously at least along half the outer border. This results in an approximately elongated heater.
  • the second region surrounds the first region, wherein they may be arranged concentrically. While the lateral connection of a second area to a first area corresponds approximately to a known elongated roaster heater, a concentric arrangement is advantageous for the use of either small or large round cookware.
  • the power for the first range may be more than the standard power common to a radiant heater of this size.
  • the power can approach the maximum value of the excess temperature fuse, for example a bar regulator.
  • a power for the first range of a maximum of 2500 or 2700 watts may be provided with a round area with a diameter of 230mm.
  • the first region can have a switchable power, which can be connected to the basic power. It is provided that the maximum first power is present when the switchable power is also applied.
  • a switchable power can be, for example, a parboiling or the like.
  • the power for the second range may be much lower, especially due to the lower power density. For example, 600 watts can be provided here. Since this power is advantageously present in the outer or edge region as a second region, in which also Cooking pots with not very even floor get up, this achievement is taken off in each case. Thus, excessive heating of a glass ceramic cooktop is avoided here. Furthermore, in the heating mode without pot, so if no heat output is removed, the glass ceramic in the edge region due to the larger area, the largest heat loss. This also protects it from overheating.
  • the heating device may have a control unit or be connected thereto.
  • This control unit may have an additional contact for switching a basic power of the heating device or a switchable power for the first range to the total added maximum first power.
  • the additional power can be defined and used for example as a boost.
  • the heating device may have an electronic control, for example with a touch switch arrangement for input.
  • Another relay may be provided to switch the switchable power in addition to the base load to the total maximum first power.
  • a radiant heater which can have a heating conductor of resistance material is used as heating device.
  • the heating conductor is preferably in a so-called flat band shape, wherein it is mounted upright on an insulating substrate and may be partially embedded therein.
  • a radiant heater 11 is shown in plan view, as it is known per se. Its heated area is overlapped by a rod regulator 13.
  • the temperature limiter or rod regulator 13 is fastened with its housing 14 on the side of the radiant heater 11.
  • the sensor rod 15 protrudes in the radial direction over the center of the radiant heater 11 a piece out.
  • an over-temperature protection is achieved by ensuring that the temperature generated above the radiant heater 11 at the bottom of a glass ceramic cooktop does not exceed a certain maximum temperature.
  • This maximum permissible temperature is around 700 ° C.
  • Such a rod controller and its function for example, go from the DE 33 33 645 or the DE 34 23 086 out.
  • the heating region of the radiant heater 11 is subdivided into a first innermost region 17.
  • the first region 17 is surrounded by an annular middle second region 19. This in turn is surrounded by a relatively narrow circumferential third region 21, which forms the outermost heating region.
  • the first region 17 is formed by first heating coils 18 which are laid in meandering fashion.
  • This basic structure of a radiant heater is apparent for example from the EP 590 315 , to which expressly referred.
  • the second heating area 19 is formed by second heating coils 20.
  • the third region 21 is again formed by third heating coils 22, which, as can be seen from FIG. 1, consist of a single loop.
  • the Schwarzhausen 18, 20 and 22 are for example advantageously formed from a heating tape in an upright ribbon shape. They may be specially selected for their characteristics in order to achieve a given power distribution or operating area performance or overall performance. It can also be seen that the heating coils 18 of the first region 17 extend at a smaller distance from one another than the second heating coils 20 of the second region 19.
  • the heating coils are connected to a power supply, for example power electronics or a so-called clocking energy regulator.
  • the heating coils 18 and 20 of the first and second regions are each contacted via the uppermost terminal lug 24a, as can be seen.
  • This terminal lug 24a is connected to the housing 14 of the rod controller 13. Your electrical connection is thus monitored by the rod controller 13 and interrupted in a case of over-temperature to turn off the first heating area 17 and the second heating area 19.
  • the rod controller 13 in this way a distinction between the first region 17 and the second region 19 in the overtemperature case. It would be possible in a further embodiment of the embodiment, to make such a distinction possible by a further rod controller. However, this does not matter for the invention in the frame discussed here.
  • the third heating coil 22 of the outer third region 21 is connected via the terminal lugs 24c and 24d. These are connected without the interposition of the rod controller 13 with a power supply. They are therefore not recognizable monitored by the rod controller 13 with respect to overtemperature.
  • FIG. 2 is a schematic thermal image of the radiant heater 11 of FIG. 1 in operation.
  • FIG. Due to the different surface markings the temperature that prevails is displayed. The brighter, the higher the temperature. The gradation is 10 ° C per brightness level.
  • the first area 17 is predominantly the brightest, the temperature here being between 545 ° C and 564 ° C and at about 555 ° C.
  • the second region 19 has temperatures in the range of 524 ° C to 544 ° C.
  • the third region 21 has predominantly temperatures in the range between 494 ° C and 514 ° C and about 500 ° C.
  • first region 17 and the second region 19 of the radiant heater 11 according to the embodiment of FIG. 1 correspond to the first region according to claim 1.
  • the third region 21 of the radiant heater 11 corresponds to the second region according to claim 1.
  • the first region 17 and the second region 19 can be activated separately. However, they are monitored jointly by the bar controller 13.
  • the radiant heater 11 is a two-circuit radiant heater. It has a diameter of 230 mm and a total nominal power of 2800 W. It accounts for the first area 17 1100 W, the second area 19 also 1100 W and the third area 21 600 W. This 600 W are the so-called unprotected or unregulated performance. From Fig. 2 it can be seen that here the temperature in about 50 ° to 60 ° lower than in the first or second region, which are centrally in the radiant heater 11. Further, the area power of the third region 21 is less than 2.5 W / cm 2 , while the power density in the first and second regions is 7.8 W / cm 2 .
  • a radiant heater can be provided with additional power, which does not have to be controlled by a rod controller or not a single common rod controller.
  • the radiant heater In operation of the radiant heater, it is such that in single-circuit operation, only the first region 17 is active. In the two-circuit operation, the second region 19 and the third region 21 are electrically connected separately but temporally together.
  • the third heating area 21 could additionally be switched off in the same way, but not indirectly by the bar controller 13, but indirectly by its characteristic as a signal generator. Although this would not be necessary in every case because of the thermal surface load of the third region 21. However, this would allow a uniform operation of all heating areas, so that the glowing image of the radiant heater does not cause the outermost area to continue to glow brightly while the central area is dark.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of Resistance Heating (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Control Of Combustion (AREA)
  • Resistance Heating (AREA)
EP04000818A 2003-02-17 2004-01-16 Heizungseinrichtung mit zwei Bereichen Expired - Lifetime EP1448024B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200430604T SI1448024T1 (sl) 2003-02-17 2004-01-16 Grelna priprava z dvema podrocjema

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10307246 2003-02-17
DE10307246A DE10307246A1 (de) 2003-02-17 2003-02-17 Heizungseinrichtung mit zwei Bereichen

Publications (3)

Publication Number Publication Date
EP1448024A2 EP1448024A2 (de) 2004-08-18
EP1448024A3 EP1448024A3 (de) 2005-10-19
EP1448024B1 true EP1448024B1 (de) 2007-11-14

Family

ID=32668113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04000818A Expired - Lifetime EP1448024B1 (de) 2003-02-17 2004-01-16 Heizungseinrichtung mit zwei Bereichen

Country Status (6)

Country Link
US (1) US7053340B2 (es)
EP (1) EP1448024B1 (es)
AT (1) ATE378797T1 (es)
DE (2) DE10307246A1 (es)
ES (1) ES2297282T3 (es)
SI (1) SI1448024T1 (es)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2583743A1 (en) * 2004-10-15 2006-04-27 Duke Manufacturing Company A food serving bar
DE102004059779A1 (de) * 2004-12-07 2006-06-08 E.G.O. Elektro-Gerätebau GmbH Vorrichtung und Verfahren zur Ansteuerung eines Mehrkreis-Heizkörpers
JP4728021B2 (ja) * 2005-03-17 2011-07-20 日本碍子株式会社 均熱性評価方法及び均熱性評価装置
US8931293B2 (en) 2007-04-12 2015-01-13 Duke Manufacturing Co. Food serving bar
FR2952289B1 (fr) * 2009-11-06 2012-02-24 Pillivuyt Ustensile de cuisson en ceramique
DE102013216290B4 (de) * 2013-08-16 2015-09-03 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Verfahren zum Betrieb einer Heizeinrichtung
DE202013007643U1 (de) 2013-08-21 2013-09-05 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung für eine Kochstelle in einem Kochfeld und Kochfeld
ES2564849B1 (es) * 2014-09-24 2017-01-12 BSH Electrodomésticos España S.A. Dispositivo de campo de cocción
DE102016224069A1 (de) * 2016-12-02 2018-06-07 E.G.O. Elektro-Gerätebau GmbH Kochgerät mit einer Kochplatte und einer Heizeinrichtung darunter
US11067288B2 (en) 2017-05-15 2021-07-20 Backer Ehp Inc. Dual coil electric heating element
US10132504B1 (en) 2017-05-15 2018-11-20 Backer Ehp Inc. Dual coil electric heating element
KR102177948B1 (ko) * 2018-10-16 2020-11-12 엘지전자 주식회사 전기 히터
USD955168S1 (en) 2019-07-03 2022-06-21 Backer Ehp Inc. Electric heating element
US11581156B2 (en) 2019-07-03 2023-02-14 Backer Ehp Inc. Dual coil electric heating element

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GB2044057B (en) * 1979-02-07 1983-04-20 Micropore International Ltd Smooth top cookers
NZ196104A (en) * 1980-02-01 1984-08-24 Micropore International Ltd Cooker plate with twin element:thermal cut-out for one
ZA813746B (en) * 1980-07-22 1982-07-28 Micropore International Ltd Electric radiant heater unit for a glass ceramic top cooker
DE3206024A1 (de) * 1982-02-19 1983-09-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Elektrokochplatte, vorzugsweise glaskeramik-kochmulde
DE3314501A1 (de) * 1983-04-21 1984-10-25 Ego Elektro Blanc & Fischer Heizelement, insbesondere strahlungs-heizelement fuer die beheizung von glaskeramikplatten
AT386714B (de) * 1983-07-07 1988-10-10 Electrovac Vorrichtung zur heissanzeige und zur regelung bzw. begrenzung der temperatur von strahlungsbzw. kontaktheizkoerpern von elektrischen kochgeraeten
DE3333645A1 (de) * 1983-09-17 1985-04-11 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Temperaturbegrenzer fuer eine glaskeramikkocheinheit
DE4022846C2 (de) * 1990-07-18 1994-08-11 Schott Glaswerke Vorrichtung zur Leistungssteuerung und -begrenzung bei einer Heizfläche aus Glaskeramik oder einem vergleichbaren Material
GB9102133D0 (en) * 1991-01-31 1991-03-13 Ceramaspeed Ltd Radiant electric heaters
GB2263379B (en) 1992-01-10 1995-07-26 Ceramaspeed Ltd Radiant heater having multiple heating zones
DE4229375C2 (de) * 1992-09-03 2000-05-04 Ego Elektro Blanc & Fischer Strahlungs-Heizkörper
GB2324946B (en) * 1997-05-01 2001-03-14 Ceramaspeed Ltd Radiant electric heater
DE19814949C2 (de) * 1997-05-07 2002-04-18 Aeg Hausgeraete Gmbh Gareinrichtung mit Induktionsbeheizung und Widerstandsbeheizung
GB2333406B (en) * 1998-01-16 2001-10-10 Ceramaspeed Ltd Radiant electric heater

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Title
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Also Published As

Publication number Publication date
DE10307246A1 (de) 2004-08-26
DE502004005460D1 (de) 2007-12-27
EP1448024A2 (de) 2004-08-18
ATE378797T1 (de) 2007-11-15
US7053340B2 (en) 2006-05-30
US20040182850A1 (en) 2004-09-23
EP1448024A3 (de) 2005-10-19
SI1448024T1 (sl) 2008-04-30
ES2297282T3 (es) 2008-05-01

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