EP1774554B1 - Dispositif pour commander plusieurs unites de chauffage d'un appareil de cuisson, et appareil de cuisson equipe d'un tel dispositif - Google Patents

Dispositif pour commander plusieurs unites de chauffage d'un appareil de cuisson, et appareil de cuisson equipe d'un tel dispositif Download PDF

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Publication number
EP1774554B1
EP1774554B1 EP05763998A EP05763998A EP1774554B1 EP 1774554 B1 EP1774554 B1 EP 1774554B1 EP 05763998 A EP05763998 A EP 05763998A EP 05763998 A EP05763998 A EP 05763998A EP 1774554 B1 EP1774554 B1 EP 1774554B1
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EP
European Patent Office
Prior art keywords
triggering
travel
heating
power
heating device
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EP05763998A
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German (de)
English (en)
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EP1774554A1 (fr
Inventor
Eugen Wilde
Erich John
Hans Mohr
Ralf Stoll
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
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EGO Elektro Geratebau GmbH
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Priority to PL05763998T priority Critical patent/PL1774554T3/pl
Publication of EP1774554A1 publication Critical patent/EP1774554A1/fr
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Publication of EP1774554B1 publication Critical patent/EP1774554B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/26—Means for adjustment of "on" or "off" operating temperature by adjustment of abutment for "off" position of the movable contact

Definitions

  • the invention relates to a device for switching or switching on and off of several heating devices of a cooking appliance and a cooking appliance with such a device.
  • Radiant heater with a certain diameter which is greater than 230 mm, for example, have the problem that their energy supply by so-called energy control devices on the one hand and overtemperature protection for a glass ceramic plate above the radiant heater by so-called temperature limiter on the other hand limited by maximum achievable benefits and a so-called Flicker standard are.
  • the Flicker standard states how often in a certain time a particular power can be switched on or off with a cooking appliance and should prevent larger network perturbations in the sense of the energy supply companies.
  • the switching capacity of both the energy control devices and the temperature limiter which work with so-called snap-action switches, as for example in the EP 898 291 A and the DE 33 33 645 A are usually limited. For example, for the US, these are 12 and 13 amps respectively. This is because 100,000 switching cycles must be achievable.
  • the US-A-5847636 shows a device for switching a plurality of heaters, for example in a hob. It has more than two switching devices, in addition to an adjustable by turning clocking switch several contact switch. These contact switches are each switched at different locations or in different rotational positions.
  • the invention has for its object to provide an aforementioned device and a cooking appliance, with which the disadvantages of the prior art can be avoided and in particular the activation of another heater to increase the heat output of a cooking stove can be achieved with the least possible effort.
  • the device has a clocking energy control device, as for example from the aforementioned EP 898 291 A is known, which has a change in distance for a trip path of a first switching device, which is included in the power control unit.
  • the change in distance in turn, can be influenced by a set adjustment path on the energy control device, for example by a rotary movement by means of a rotary knob of the energy control unit.
  • the trip path in turn defines the on or off times or their relationship to each other, with which the heater is either disabled or activated at full power.
  • the so-called average energy production can take place or results in the so-called average power.
  • a second trip point is provided, on which a second switching device is activated or turned on, with which a second heating device can be activated.
  • This second heating device is advantageously an additional heater for the first heating device.
  • both heaters form a cooking point, it is possible in this way that the power for the second heater does not have to be switched via the same first switching device which also switches the first heating device. This means that larger heating capacities are possible at a cooking place than before.
  • the change in distance is designed such that it resets the triggering path for the first switching device to an initial value at the second triggering point for the definition of the on and off times and their relationship to one another, wherein the triggering path is then changed again as the adjustment path increases further, especially in the same direction as before.
  • the change in distance causes the triggering path to increase from an initial value to the second triggering point, in each case with an overall increasing adjustment travel, and thus correspondingly influences the first shifting device.
  • the second heating device is activated via the second switching device in addition to the first heating device.
  • the triggering for the first heating device in turn is reset and thus also their average power output over a certain period of time, so for example at a Cooking device set to a low level again.
  • this second triggering point is set so that the average power generated by the first heating device until shortly before the second triggering point corresponds to that which then generates the second heating device.
  • the average power generated by the first heater from the second trigger point is again greatly reduced and begins with increasing Setting path and increasing triggering path to rise again.
  • a certain constant value of the average power is generated by the second heating device.
  • the variable component which can be influenced by the energy control device at the first heating device in its height, then comes again in an increasing manner from the heater.
  • the device may include or be connected to a temperature limiter, which is arranged in the effective range of the first heating device, under certain circumstances also in the effective range of the second heating device.
  • This temperature limiter can be formed, for example, as described in the aforementioned De 33 33 645 A and switch off the first heating means when a certain temperature is exceeded, in particular for the protection of a glass ceramic plate arranged above the heating device.
  • the temperature limiter may have a switch in the connection path for the first heating device.
  • the clocking power control device may be designed as an electromechanical device such that the adjustment path is influenced by a linear movement or preferably a rotary movement. When turning it should be slightly less than 360 °. About the change in distance, the rotational movement is converted into a substantially rectilinear tripping.
  • the energy control unit or the change in distance for example, have a rotary shaft with a non-circular running disk, at the outer edge of a part of a switching device and the first switching device is applied. Their switching behavior with respect to the on-off times or their relationship to each other depends on the variable triggering path, ie the variable radius of the disc.
  • a similar, triggering can be provided, in particular by a non-circular disc or a kind of cam.
  • this disc or cam activates the second switching device to turn on the second heater.
  • no continuously changed radius is required because no increasing trip path is required.
  • the second trigger point at which the second heater detaches the generation of the heating power from the first heater, so to speak may preferably be set so that the average power of the first heater at that point is less than half the maximum total power, for example, about one One-third.
  • the transition between cooking, such as liquids, and frying, such as meat in a pan takes place.
  • the particularly advantageous with the invention particularly large heating capacities at a cooking area are in addition to the fastest possible boiling of pots with water for such frying with high performance advantage.
  • two heaters may be provided for a cooking area, wherein the cooking appliance is a hob with a glass ceramic plate and radiant heaters underneath and may have a plurality of such cooking zones.
  • the second heating device has a maximum continuous power corresponding to a power density of about 2.5 W per cm 2 . With this value, the second heating device can generally be operated without temperature monitoring against overheating of the glass ceramic plate. Thus, no temperature monitoring against overheating of the glass ceramic needs to be provided for the second heating device or its operation.
  • the power density can also be chosen over 2.5 W / cm 2 , if the Specifications or tests of the manufacturer of the glass ceramic give this or permit.
  • the two heaters are advantageously electrically separated from each other.
  • they are contained in a so-called single-circuit radiator in contrast to two-circuit radiators, which allow a size extension of a cooking area for larger cooking vessels.
  • the first heating device and the second heating device consist of elongated heating resistors, in particular in flat band form, which are laid in a spiral or meandering shape on a surface.
  • the two heating devices can each extend in parallel as heating strips and cover the same total area overall.
  • Fig. 1 a functional diagram of a device 11 according to the invention is shown, with which a first heating device 13 and a second heating device 15 can be controlled. These form a common hotplate 19, as seen from Fig. 3 can be removed. It should be noted that the two heaters 13 and 15 do not form a basic and an additional heating zone, but both heat approximately the same area. The second heating device 15 serves only to provide additional heating power on the surface of the hotplate 19.
  • Both heaters 13 and 15 may be so-called radiant heaters, as shown for example in the EP 590 315 A are described, to which express reference is made. They are operated with mains voltage, in Germany for example 230V and in the USA 120V - 240V. Their operation is usually carried out in a clocking manner such that a heating device either rests on the supply voltage and operates at full power or is disconnected from the supply voltage and is thus deactivated. The amount of energy production takes place over a certain period of time not by lowering the supply voltage for continuous operation, but by clocking with on-times and off-times. By the clock ratio or the duration of the respective on and off times, the so-called average power generation can take place or results in the so-called average power.
  • the first heater 13 is clocked to determine the height of the average continuous power, as well as the second heater 15.
  • a Energy control device 21 is provided for the control of the heaters in the aforementioned manner with on and off times in a clocking manner.
  • a similar power control device 21 is, for example, in the aforementioned EP 898 291 A or the DE 102 004 020 977 A described, which is expressly referred to.
  • a rotational movement of a knob 22 by an operator a certain cooking level can be set, which determines the height of the average power of the heaters or hotplate 19 over a long period of time.
  • the knob 22 is seated on a rotary shaft 23.
  • the power control device 21 turns on and off the first heater 13 with the illustrated first switching device 24.
  • a first shift drum 27 is mounted on the rotary shaft 23, which has a certain course. At the first shift drum 27 is located on a slider 26 which carries the first switching device 24 with the contacts 25.
  • the switching device 24 is designed as a snap-action switch. Regarding the more accurate function is based on the aforementioned EP 898 291 A Reference is made to the content of this application by express reference. The exact shape of the first shift drum 27 will also be explained in detail below.
  • a cam 34 sits on the rotary shaft 23, a cam 34.
  • the exact course of the cam plate 34 will also be explained in more detail below.
  • Fig. 3 is a plan view of the hotplate 19 shown schematically. It can be seen how the two heaters 13 and 15 as elongated Schuleiterb selected or resistors parallel to each other, the surface of the cooking area 19 cover approximately. Furthermore, a temperature limiter 40 is provided, as it is for example in the aforementioned DE 33 33 645 A is described. It has a long sensor 41 and includes a temperature limiting switch 42. Concerning the exact training and function is on the aforementioned DE 33 33 645 A Reference is made to the content of this application by express reference.
  • the sensor 41 covers a certain area of the cooking zone 19 and preferably passes over a type of free zone between the tracks of the first heater 13 and the second heater 15.
  • the temperature limit switch 42 can only interrupt the supply of the first heater 13. Thus, although it detects the temperature of the entire cooking zone 19, but only interrupts the power supply to the first heater 13 in the case of too high a temperature or a temperature corresponding to a covering glass ceramic plate 18 according to Fig. 4 is considered harmful.
  • the second heating device 15 is designed for a continuous power which does not exceed a value of about 2.5 W per cm 2 of covered area. For this value, it is possible and allowed to operate the second heater 15 permanently, without an excess temperature on the glass ceramic plate 18 could arise. Thus, no temperature limiter 40 must be provided here.
  • the power of the second heater 15 may provide an overall desired total output in addition to the power of the first heater 13.
  • the advantage of this division 'of the total power Pges on the two heaters is that via the energy control unit 21 and the two switching devices 24 and 30 contained therein both heaters 13 and 15 are turned on with respect to their be specified by an operator cooking level. Since the total power of the cooking zones 19 distributed to the two switching devices 24 and 30, there are no problems here with too large to be switched currents or overload.
  • the temperature limiter 40 or its switch 42 only has to switch or interrupt the power of the first heating device 13 when the overtemperature is to be threatened. Since the maximum average power for the second heater 15 is in a range for which no temperature limitation is necessary, it can still be operated even if the first heater 13 must be turned off due to otherwise too high temperature.
  • first region 27a which extends from 0 ° to about 140 °, so the radius of the shift drum 27 decreases steadily from the largest value.
  • the radius increases again, to such an extent that it corresponds to that radius in the region 27a at which the smallest cooking level is reached, ie the smallest average continuous power which the first heating device 13 generates via the energy control device 21. This is just past the outermost point of the shift drum 27 in the area 27a. From this increase, the radius decreases again in the area 27b over substantially the remaining angular range to just before 360 °. There again, the area 27a begins with the strong increase.
  • the cam disk 34 has the beginning of the region 34b. This extends from this angle ⁇ of about 140 ° to about 360 °, wherein here the radius is increased compared to the radius in the region 34a and is approximately constant. Over an angle of about 0 ° to about 140 °, the range extends. If the grinder 32 of the second switching device 30 at the region 34a, so the contacts 31 are opened and the second heater 15 is turned off. Energy is generated at the cooking area 19 only via the first heating device 13. If the full power of the second heating device 15 is switched via the second switching device 30, then it is recommended that these also be designed as snap-action switches for improved switching behavior.
  • the average powers P1 for the first heater 13, P2 for the second heater 15 and Pges for the entire cooking point 19 are shown in the course of the rotation angle.
  • P2 is shown dotted, Pges dot-dashed.
  • the power P1 increases from a certain starting value, for example, just over 100 watts, up to about 1,200 watts at 140 °.
  • the slider 26 together with the first switching device 24 is pushed up again by the beginning of the range 27b, and as far as in the area 27a after the survey and at the lowest possible switched on average power. So these are just over 100 watts again. From here, the power P1 increases again due to the decreasing radius of the region 27b, as shown.
  • the second switching device 30 switches on through the second region 34b on the cam disk 34, and the second heating device 15 is activated.
  • the power P2 is constant even as the angle increases.
  • the total power Pges is given by adding P1 and P2.
  • the value for P2 can be selected at about 1,100 watts.
  • P1 can be a maximum of 2,100 watts, so that a total of 1900 heating power of 3,200 watts is generated, which is well above current maximum heating power.
  • the temperature limiter 40 disconnects only the first heater 13 via the switch 42.
  • the size of the hob 19 may be about 230mm or correspond to such a conventional hob. At a voltage of 240V, this normally only has a power of 2,500 watts, so that an increase of the heating power by more than 25% is possible.
  • the cyclic operation of the energy control device 21 does not affect the second heating device 15. This is depending on the angular position of the rotary shaft 23 either on or off. This must be taken into account when dimensioning the respective heating devices for a certain average power.
  • the coverage of the second heater 15 by the sensor 41 of the temperature limiter 40 affects or does not interfere with the function here.
  • the second heater 15 contributes to increase the temperature.
  • due to the choice of its maximum heating power of about 2.5 W per cm 2 it can even when reaching an excess temperature and subsequent shutdown of the first heater 13 continue to be easily operated. Continuous heating may even be beneficial for some cooking operations because it is more uniform.
  • An advantageous embodiment of the invention can thus have a device for power supply for a cooking place two heaters, which are laid parallel to each other.
  • a device for power supply for a cooking place two heaters, which are laid parallel to each other.
  • an electromechanical energy control device depending on an angular position, either only a first heater operated regulated or a second heater firmly connected.
  • the power of the second heater is chosen so low that no temperature limiter must be provided in the drive path of the second heater to protect a glass ceramic plate against overheating.
  • the second heater is switched on, the regulated power of the first heater is reduced to an initial value by approximately the amount of power of the second heater. The total power results from the added power of the two heaters.

Landscapes

  • Electric Stoves And Ranges (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Cookers (AREA)
  • Baking, Grill, Roasting (AREA)
  • Resistance Heating (AREA)

Claims (9)

  1. Dispositif (11) pour mettre en et hors circuit plusieurs unités de chauffage (13, 15) d'un appareil de cuisson, les unités de chauffage étant disposées sur l'appareil de cuisson, le dispositif présentant un appareil de commande d'énergie cyclique (21) pour régler les temps de cycle d'une première unité de chauffage (13), l'appareil de commande d'énergie présentant un premier dispositif de commutation (24) avec une course de déclenchement et un premier point de déclenchement pour le premier dispositif de commutation, ainsi qu'un deuxième dispositif de commutation (30) avec une course de déclenchement et un deuxième point de déclenchement (34b) pour le deuxième dispositif de commutation, et un variateur d'espacement (26, 27, 32, 34) pour la course de déclenchement des dispositifs de commutation (24, 30), sachant que l'appareil de commande d'énergie présente un mécanisme pour une course de réglage afin d'influencer le variateur d'espacement, que la course de déclenchement définit les temps de marche ou d'arrêt ou leur rapport entre eux et qu'au deuxième point de déclenchement (34b) de la deuxième course de déclenchement est activé ou mis en circuit par la course de réglage le deuxième dispositif de commutation (30) pour la deuxième unité de chauffage (15), caractérisé en ce qu'au deuxième point de déclenchement (34b), le variateur d'espacement (26, 27, 32, 34) règle de nouveau sur la valeur initiale (27a) de la définition des temps de marche ou d'arrêt ou du rapport entre eux la course de déclenchement pour le premier dispositif de commutation (24) afin de modifier de nouveau la course de déclenchement quand la course de réglage augmente, sachant que le deuxième point de déclenchement (34b) pour activer le deuxième dispositif de commutation (30) se trouve sur la course de déclenchement à l'endroit où la puissance moyenne (P1) de la première unité de chauffage (13) établie sur plusieurs temps de marche et d'arrêt est au moins égale à la puissance (P2) de la deuxième unité de chauffage (15).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'au deuxième point de déclenchement (34b), la puissance moyenne (P1) réglable pour la première unité de chauffage (13) est égale à moins de la moitié de la puissance moyenne maximale (Pges).
  3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce qu'il présente un limiteur de température (40) disposé au moins dans le champ d'action de la première unité de chauffage (13) et la met hors circuit lorsqu'une certaine température est dépassée, sachant que le limiteur de température présente de préférence un commutateur (42) disposé dans la voie de raccordement pour la première unité de chauffage (13).
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'appareil de commande d'énergie cyclique (21) est conçu pour un mouvement rotatoire faisant fonction de course de réglage, sachant que la course de réglage est inférieure à 360°, et que de préférence le variateur d'espacement (26, 27, 32, 34) convertit le mouvement rotatoire en une course de déclenchement rectiligne pour l'essentiel.
  5. Dispositif selon la revendication 4, caractérisé en ce que l'appareil de commande d'énergie cyclique (21) présente un arbre rotatif (23) pour le réglage, sachant que sur l'arbre rotatif est disposé un deuxième déclencheur (34) au deuxième point de déclenchement (34b) pour le deuxième dispositif de commutation (30).
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la première course de déclenchement et la deuxième course de déclenchement se modifient en fonction de la course de réglage, la course de réglage étant la même pour les deux courses de déclenchement.
  7. Appareil de cuisson avec un dispositif (11) selon l'une des revendications précédentes, avec une première et une deuxième unités de chauffage (13, 15), sachant que l'appareil de cuisson est une table de cuisson avec une plaque en vitrocéramique (18) et des éléments thermiques radiants (13, 15) situés en dessous et faisant fonction d'unités de chauffage, sachant que la deuxième unité de chauffage (15) présente une puissance continue maximale d'environ 2,5 W par cm2.
  8. Appareil de cuisson selon la revendication 7, caractérisé en ce que les deux unités de chauffage (13, 15) sont électriquement séparées l'une de l'autre.
  9. Appareil de cuisson selon la revendication 7 ou 8, caractérisé en ce que les unités de chauffage (13, 15) sont disposées parallèlement, sachant qu'elles s'étendent sur une seule et même surface pour l'essentiel.
EP05763998A 2004-08-03 2005-07-23 Dispositif pour commander plusieurs unites de chauffage d'un appareil de cuisson, et appareil de cuisson equipe d'un tel dispositif Active EP1774554B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05763998T PL1774554T3 (pl) 2004-08-03 2005-07-23 Urządzenie do przełączania szeregu urządzeń grzejnych sprzętu do gotowania oraz sprzęt do gotowania z takim urządzeniem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/910,434 US7145109B2 (en) 2004-08-03 2004-08-03 Appliance for switching on and off several heating devices of a cooker, as well as cooker having such an appliance
PCT/EP2005/008043 WO2006015710A1 (fr) 2004-08-03 2005-07-23 Dispositif pour commander plusieurs unites de chauffage d'un appareil de cuisson, et appareil de cuisson equipe d'un tel dispositif

Publications (2)

Publication Number Publication Date
EP1774554A1 EP1774554A1 (fr) 2007-04-18
EP1774554B1 true EP1774554B1 (fr) 2010-12-29

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ID=35044922

Family Applications (1)

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EP05763998A Active EP1774554B1 (fr) 2004-08-03 2005-07-23 Dispositif pour commander plusieurs unites de chauffage d'un appareil de cuisson, et appareil de cuisson equipe d'un tel dispositif

Country Status (7)

Country Link
US (1) US7145109B2 (fr)
EP (1) EP1774554B1 (fr)
AT (1) ATE493745T1 (fr)
DE (1) DE502005010762D1 (fr)
ES (1) ES2358874T3 (fr)
PL (1) PL1774554T3 (fr)
WO (1) WO2006015710A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8258437B2 (en) * 2009-08-27 2012-09-04 Whirlpool Corporation Non-concentric surface heating element switch
US9752784B2 (en) 2014-07-21 2017-09-05 Electrolux Home Products, Inc. Heating element control circuit
US20160227609A1 (en) * 2015-01-30 2016-08-04 Schott Corporation Multi function glass or glass-ceramic cooktop system and method of cooking thereon
CN109206339B (zh) * 2017-06-29 2021-04-27 湘潭大学 一种环己胺氧化制备环己酮肟的方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH391057A (de) * 1962-03-21 1965-04-30 Elcalor Ag Bimetallschalter und Verwendung desselben
DE3410442A1 (de) 1983-09-17 1985-09-26 Ego Elektro Blanc & Fischer Temperaturfuehler, insbesondere fuer einen temperaturbegrenzer fuer eine glaskeramik-kocheinheit
DE4229375C2 (de) 1992-09-03 2000-05-04 Ego Elektro Blanc & Fischer Strahlungs-Heizkörper
US5847636A (en) * 1997-02-07 1998-12-08 Sehlhorst; Scott B. Heat motor operated load regulating switch assembly
DE19736308A1 (de) * 1997-08-21 1999-02-25 Ego Elektro Geraetebau Gmbh Leistungssteuergerät
US6951997B2 (en) * 2002-07-26 2005-10-04 Ark-Les Corporation Control of a cooktop heating element
DE102004020977B4 (de) 2004-04-22 2007-06-21 E.G.O. Elektro-Gerätebau GmbH Vorrichtung zur variablen Einstellung der Leistung einer Heizeinrichtung mit mindestens zwei Heizkreisen

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Publication number Publication date
US7145109B2 (en) 2006-12-05
ATE493745T1 (de) 2011-01-15
ES2358874T3 (es) 2011-05-16
US20060027563A1 (en) 2006-02-09
EP1774554A1 (fr) 2007-04-18
WO2006015710A1 (fr) 2006-02-16
DE502005010762D1 (de) 2011-02-10
PL1774554T3 (pl) 2011-05-31

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