EP1774831B1 - Vorrichtung zum schalten von mehreren heizeinrichtungen eines kochgerätes sowie kochgerät mit einer solchen vorrichtung - Google Patents

Vorrichtung zum schalten von mehreren heizeinrichtungen eines kochgerätes sowie kochgerät mit einer solchen vorrichtung Download PDF

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Publication number
EP1774831B1
EP1774831B1 EP05775822.9A EP05775822A EP1774831B1 EP 1774831 B1 EP1774831 B1 EP 1774831B1 EP 05775822 A EP05775822 A EP 05775822A EP 1774831 B1 EP1774831 B1 EP 1774831B1
Authority
EP
European Patent Office
Prior art keywords
switching
heating
cooking appliance
heating device
temperature
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.)
Not-in-force
Application number
EP05775822.9A
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German (de)
English (en)
French (fr)
Other versions
EP1774831A1 (de
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
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 PL05775822T priority Critical patent/PL1774831T3/pl
Publication of EP1774831A1 publication Critical patent/EP1774831A1/de
Application granted granted Critical
Publication of EP1774831B1 publication Critical patent/EP1774831B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B3/746—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
    • H05B2213/04—Heating plates with overheat protection means
    • 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 device for switching or switching on and off of several heating devices of a cooking appliance and a cooking appliance with such a device.
  • thermomechanical temperature detection of the device in the manner of a so-called rod controller triggers two switches in a housing of the device in a single movement.
  • the switching points of Both switches are separated and independently adjustable.
  • thermo-mechanical temperature detection namely the so-called rod, in a single movement triggers two switches in a housing of the device.
  • the invention has for its object to provide an aforementioned device and an aforementioned cooking appliance with which the problems of the prior art can be avoided and in particular at a cooking place with radiant heating, the maximum power can be increased.
  • the device has a temperature sensing device or under some circumstances forms such, which has a temperature-dependent thermo-mechanical release movement as a functional principle.
  • the temperature detecting device has or is connected to a first switching device, which is triggered directly by a triggering movement at an adjustable switching device Trigger point can be actuated to turn the first heater on and off.
  • a second switching device is provided for switching on and off the second heating device. This second switching device can also be activated by the release movement.
  • Both the first switching device and the second switching device are designed for the switching of the heating power of the respective heating device, ie as a so-called power switch, such as relays. They are also designed so that they reach the required number of switching cycles.
  • the second switching device or its release is provided that it can be activated indirectly by the release movement.
  • the switching contacts are moved directly by the tripping movement.
  • the second switching device is activated due to the triggering of the first switching device by the release movement and the signal or a voltage caused thereby the second switching device.
  • the activation does not take place directly mechanically via the tripping movement, but indirectly, by being controlled by the first switching device activated by the tripping movement.
  • a temperature detecting device which instead of a conventional temperature limiter, as for example from the DE 33 33 645 A shows, may be provided to monitor the glass ceramic plate of a hob with radiant heating against overtemperature.
  • the two heaters belong to a single hotplate, so they are operated together at least occasionally. In particular, it is a so-called two-or Mehrnikstelle.
  • the temperature detection device thus triggers the first and the second switching device, wherein each switching device switches on or off its associated heating device.
  • the entire power of the hotplate no longer has to be from a single one Switching device of the temperature detection device can be switched, whereby the overall performance of the heaters or the hotplate can be increased.
  • relays When using relays as switching devices, it is preferred if they are designed so that they are open in the de-energized state, ie in the deactivated or non-activated state. Then the connected heating devices are switched off.
  • the second switching device can be activated directly by the first switching device. This can be done, for example, such that, when the first switching device is closed to switch on the first heating device, the second switching device receives a corresponding electrical signal, in order then to activate or to turn on the second heating device.
  • the second switching device can be supplied with energy from the connection of the first heating device to a supply voltage for activation.
  • the second switching device is not activated directly by the tripping movement, but indirectly, by being controlled by the activated by the tripping first switching device.
  • the third switching device for driving the second switching device can either operate at a lower voltage than mains voltage or be designed for much lower currents. Your task is only to switch the activation current for the second switching device. In the case of power relays as well as under certain circumstances electronic switches, this is relatively low, so that no increased mechanical or contact-specific requirements are to be placed on the third switching device.
  • the temperature detection device may advantageously have an expansion device which expands depending on the detected temperature or causes a mechanical release movement.
  • it may be a temperature limiter, as he from the DE 33 33 645 A which is expressly referred to in this regard and whose content is incorporated by express reference into the content of this application.
  • a temperature limiter can have two elongate and parallel longitudinal elements which are coupled at one end and have different coefficients of thermal expansion. At a predetermined or detected temperature, these expand to different degrees, and this relative movement causes the release movement, since at the non-coupled end, the relative movement takes place between them.
  • one of the elements can be fixed to the temperature detection device. The other moves relative thereto and produces a force which, together with the triggering movement, can actuate a switching device or the like, for example.
  • the device may have or be connected to a drive for the heating devices, for example a so-called clocking energy control device.
  • a drive for the heating devices for example a so-called clocking energy control device.
  • clocking energy control device By such a radiant heater, for example, operated clocking, which means that they are either turned off or turned on at full power.
  • the amount of power generation at the heaters over several clocks or a certain time can be specified.
  • the temperature-detecting device merely provides overheating protection, for example of a glass-ceramic plate, against excessive heating by the heating devices.
  • An inventive cooking appliance may include an aforementioned device for at least two independently controllable heating devices. These two heaters form a hotplate or are placed very close to each other so that in some modes they are used together to heat a single appropriately sized cooking vessel placed thereon.
  • the first heater is a main heater
  • the second heater is an auxiliary heater.
  • the second heating device can either connect laterally to the first heating device in approximately one half, if necessary, it can even completely surround it. For smaller cooking vessels is intended to heat these only with the first heater. For larger cooking vessels that cover the entire area of the first and second heaters, both heaters will be used used together.
  • the temperature detection device in the case of an excess temperature at a region, in particular at the area of the first heater, not only this, but both heaters off. Otherwise, especially with the use of radiant heaters, a picture unfamiliar to the operator would be displayed.
  • the power of the first heater is substantially greater than that of the second heater, for example, about twice as large.
  • a maximum continuous power corresponding to a power density of at most about 2.5W per cm 2 may be provided.
  • Such a value has the advantage that when using radiant heaters and a glass ceramic plate as a hob such power density can be operated so to speak unprotected, so without temperature control for the glass ceramic. Harmful temperatures of about 550 ° C and more can not be achieved. Such power densities can not lead to overheating of the glass ceramic.
  • the power density can also be selected above 2.5 W / cm 2 , if the specifications or tests of the manufacturer of the glass-ceramic result or permit.
  • the power of the second heater is used for a warming function for a placed cooking vessel, in particular with a clock mode. For this purpose, a lower power density is good. This can also be rationalized when the control of the heaters via clocking power relay takes place, for example, controlled by touch switch as controls.
  • the temperature detection device in its function as overheat protection, to use only the first heating device must monitor, but not the second.
  • it may cover the first heater, but not the second heater.
  • it may be deactivated in the area of the second heating device.
  • one of the two longitudinal elements is partially replaced by another part longitudinal element which has the same temperature extension as the other longitudinal element.
  • the cooking appliance can advantageously have a clocking energy control device, as has been described above and for example from the EP 898 291 A evident.
  • This energy control device is designed at least for the activation of the first heating device. Characterized in that the second heater is activated or activated via the aforementioned device or the temperature detection device, and the power level of the heaters in turn is determined by the power control unit, this gives the on and off times for both the first heater and consequently for the second heating device.
  • a fourth switching device can be provided, which independently of the second or third switching device, the second heater ever activated or deactivated for synchronous operation with the heater.
  • This fourth switching device may, for example, allow an operator, depending on the size of the attached cooking vessel, to activate the additional heating in principle or not. It can be formed, for example, by a circuit breaker inserted in the supply voltage, in particular a relay, with a corresponding control for an operator, for example a touch switch.
  • the second switching device is provided separately from the power control unit on the cooking appliance. This may, as described above, be a separate power switch, in particular a relay.
  • 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 can form a so-called two-circuit heating, as they are in Fig. 2 is shown and explained there.
  • Both heaters 13 and 15 are so-called radiant heaters, as shown for example in the EP 590 315 A are described. They are operated with mains voltage, so for example 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 power generation over a period of time does not occur by lowering the supply voltage for continuous operation, but by clocking on-times and off-times.
  • the so-called average energy production can take place or results in the so-called average power. From the drawing can also be seen that the two heaters 13 and 15 are galvanically separated from each other, which is generally advantageous.
  • securing means which can turn off one of the heaters 13 or 15 at excess temperature in the trough of the hob.
  • This has the advantage that not only the glass ceramic 18 is protected against excessive temperature, but also the units such as electrical or electronics in the trough. Likewise, the environment of the hob 17 is protected.
  • These safety devices are advantageous for the heaters 13 and 15 separately or respectively provided in their control. It may be, for example, so-called Klixons, in particular as in distributed to the USA. These are bimetallic switches that open a contact when a certain temperature is exceeded, the switching point is set to the critical or too high temperature. In such safety devices can also be provided that only one of the two heaters a fuse is available. By reducing a part of the heat output too high a temperature can usually be avoided.
  • an energy control device 21 For the control of the first heater 13, namely in the aforementioned manner with on and off times in a clocking manner, an energy control device 21 is provided.
  • This power control device 21 is for example in the EP 898 291 A whose content is hereby incorporated by express reference into the content of this description.
  • a rotational movement of a knob 22 by an operator a certain cooking level can be set, which determines the amount of power generation of the heater 13 and the average power. Usually this is divided into so-called cooking stages, for example in half steps from zero to nine.
  • the power controller 21 turns on or off the heater 13 with the illustrated switch corresponding to the above-described first switch means in the predetermined on and off times.
  • the temperature limiter 23 which is shown in a functional manner surrounded by a dashed line, is similar in construction, for example in the aforementioned DE 33 33 645 A described.
  • the temperature limiter 23 has a first switch 24, which corresponds to the aforementioned first switching device. Furthermore, it has a third switch 25, which corresponds functionally to the aforementioned third switching device. This will be discussed in more detail later.
  • the temperature limiter 23 has an elongate sensor 26, which consists of an outer sensor tube 27 and inner rods arranged therein 28a and 28b exists. Its function is with respect to those not covered by the invention Fig. 4 explained in more detail.
  • the first switch 24 is opened or closed. Up to a usually set temperature in the range 550 ° C to 650 ° C, the first switch 24 is closed and the power supply or the activation of the first heater 13 is carried out exclusively via the power controller 21. If this limit temperature is exceeded, which will be discussed in more detail below , the temperature limiter 23 opens the first switch 24 and the first heater 13 is turned off or deactivated.
  • the device 11 has a second heating device 15. These, like the first heating device 13, can also be designed as radiant heating with the same clocking mode of operation. Via an additional switch 31, a basic activation of the second heating device 15 by the operator takes place. Furthermore, a power relay 32 is provided in the power supply, which corresponds to the aforementioned second switching device. Only when auxiliary switch 31 and power relay 32 are closed, the second heater 15 is activated. In order to control the power relay 32, the temperature limiter 23 uses the third switch 25, which is usually provided for a hot display, but not here. He corresponds here to the aforementioned third switching device.
  • the power relay 32 can only close and thus activate the second heater 15 when the temperature limiter 23 is connected to the supply voltage, ie when the power controller 21 provides a on-time. Furthermore, it is then the case here that the first switch 24 and the third switch 25 are always opened or closed at the same time, so that the heating devices 13 and 15 are in the case of common operation be switched on and off simultaneously and simultaneously.
  • the third switch 25 can only supply the power relay 32 with voltage when the first switch 24 is closed. It is thereby achieved that the power relay 32 can be activated depending on the switching state of the third switch 25 as well as on the switching state of the first switch 24 for switching on the second heating device 15.
  • Fig. 2 It is shown how the first heating device 13 as an inner heating circuit and the second heating device 15 as an outer heating circuit form a cooking zone 19 of a hob 17 as an electrical appliance with a glass ceramic plate 18.
  • the temperature limiter 23 extends with the sensor 26 from the outside once across a circular ring of the second heater 15 and fully on the first heater 13. In the area above the second heater 15, the sensor 26 is deactivated, which in connection with Fig. 4 is explained in more detail.
  • the supply line to the first heating device 13 via the temperature limiter 23 and there the first switch 24 runs. It is the power control unit 21 is provided with the knob 22, which is connected to the supply voltage and the hotplate 19 controls.
  • additional switch 31 consisting of an accessible for an operator control element and a switch shown a fundamental connection of the second heater 15 can be done. Furthermore, via the temperature limiter 23, the power relay 32 can be controlled as the first Heater 13 so as to connect the second heater 15 with the supply voltage.
  • Fig. 3 is the arrangement after Fig. 2 shown in a side view.
  • the sensor 26 of the temperature limiter 23 extends above the heating devices 13 and 15, ie between them and the underside of the glass-ceramic plate 18. Since the distance of the heating devices 13 and 15 and of the sensor 26 to the underside of the glass-ceramic plate 18 is known , the temperature limiter 23 can be set to a shutdown temperature or limiting temperature, which corresponds to a not to be exceeded limit temperature on the glass ceramic plate 18.
  • Fig. 4 is a detailed representation of not encompassed by the invention temperature limiter 23 including sensor 26 included.
  • the sensor 26 it can be said that it consists of an outer sensor tube 27 and two inner rods 28a and 28b.
  • the sensor tube 27 is fixed, for example metallic and fixed to a housing of the temperature limiter 23.
  • the inner rod 28 and the sensor tube 27 are connected to each other, for example, jammed or by a stop.
  • the inner rod 28a may be made of ceramic, that is, have a negligible temperature expansion coefficient.
  • the sensor tube 27 expands considerably more than the inner rod 28a.
  • a relative movement of the entire inner rod takes place relative to the sensor tube, whereby the switches 24 and 25 are moved or switch.
  • the deactivation of the sensor 26 via the second heating device 15 has the purpose and can only be carried out if the power of the second heating device 15 is so low that it does not exceed a surface-related heating power of about 2.5W per cm 2 . This has been done before.
  • the choice of this heating power thus makes it possible to make do without temperature limitation in the region of the second heating device 15 and thus to require no temperature limiter.
  • the achievable total heating power of the cooking area 19, which should be sensibly monitored to avoid unnecessary expense only by a single temperature limiter be higher than it would be possible if the entire power would have to be switched exclusively via the temperature limiter 23.
  • the temperature limiter 23 for the activation of the additional second heating device 15 is used only as a signaling control.
  • This division of the hotplate 19 into two heaters 13 and 15 may either be provided, as has been essentially described above, to provide a simple and meaningful power control depending on the size of the cooking vessel used.
  • an operator decides whether the second heater 15 is to be used at all because of a corresponding cooking vessel.
  • the two heaters 13 and 15 in terms of variable sizing, but always to use both to combine in the then provided cooking place the largest possible heating power and continue to only a single Provide temperature limiter 23 and a single switch in the power controller 21. Then can be dispensed with the additional switch 31, and the second heater 15 is always switched on together with the first heater 13 at the same time or just off.
  • FIG. 5 Another alternative not covered by the invention is in Fig. 5 shown.
  • the power relay 32 wherein the third switch 25 'corresponds to the above-described second switching device, but the power for the second heater 15 switches directly.
  • the first switch 24 also designed as a circuit breaker.
  • a conventional temperature limiter 23 is structurally modified in such a way, in particular with some effort, that two mains voltage switches or circuit breakers 24 and 25 'are contained in a housing. This can be dispensed with the second power relay 32.
  • FIG. 6 Another alternative arrangement 111 to that after Fig. 1 is in Fig. 6 shown.
  • the control of the relay 132 is not made here via a further switching device in dashed symbolized temperature limiter 123.
  • the switch 24 off Fig. 1 corresponds, a contact P1 is provided.
  • the relay 132 is connected.
  • the switch 124 directly energizes both the heater 113 and the second heater 115 indirectly via the activation of the relay 132. Both heaters 113 and 115 are always in operation at the same time.
  • the relay 132 corresponds to the second switching device according to the invention. Because the first switch 124 is triggered via the activation movement in the temperature limiter, thereby also the relay 132 is triggered in the sense of the invention.
  • a drive can be provided for switching on and off of two heaters of a hob, which form a multi-circuit cooking area.
  • About an energy control unit can be set in a clocking manner, the permanent energy or power generation in height.
  • a temperature limiter monitors a maximum temperature above the first heating device, but not above the second heating device. The energy control device directly controls or switches the first heating device. The temperature limiter triggers a power relay to switch the second heater simultaneously with the first heater.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
EP05775822.9A 2004-08-03 2005-07-26 Vorrichtung zum schalten von mehreren heizeinrichtungen eines kochgerätes sowie kochgerät mit einer solchen vorrichtung Not-in-force EP1774831B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05775822T PL1774831T3 (pl) 2004-08-03 2005-07-26 Urządzenie do przełączania kilku urządzeń grzejnych sprzętu do gotowania oraz sprzęt do gotowania z takim urządzeniem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/910,437 US7180038B2 (en) 2004-08-03 2004-08-03 Device for switching on and off several heating mechanisms of cooking equipment as well as cooking equipment with such a device
PCT/EP2005/008099 WO2006015719A1 (de) 2004-08-03 2005-07-26 Vorrichtung zum schalten von mehreren heizeinrichtungen eines kochgerätes sowie kochgerät mit einer solchen vorrichtung

Publications (2)

Publication Number Publication Date
EP1774831A1 EP1774831A1 (de) 2007-04-18
EP1774831B1 true EP1774831B1 (de) 2015-07-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05775822.9A Not-in-force EP1774831B1 (de) 2004-08-03 2005-07-26 Vorrichtung zum schalten von mehreren heizeinrichtungen eines kochgerätes sowie kochgerät mit einer solchen vorrichtung

Country Status (5)

Country Link
US (1) US7180038B2 (pl)
EP (1) EP1774831B1 (pl)
ES (1) ES2546791T3 (pl)
PL (1) PL1774831T3 (pl)
WO (1) WO2006015719A1 (pl)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7268324B2 (en) * 2005-06-29 2007-09-11 Ceramaspeed Limited Electric cooking assembly with hot-warning indicator
ES2393495B1 (es) * 2010-10-20 2013-11-04 Eika S. Coop. Aparato de cocina que comprende al menos un calefactor radiante adaptado a una encimera de cocción principalmente vitrocerámica, y método de funcionamiento de dicho aparato de cocina.
US8723085B2 (en) * 2010-11-24 2014-05-13 Pioneering Technology Corp. Temperature controlled/limiting heating element for an electric cooking appliance
US8933377B2 (en) 2011-12-09 2015-01-13 E.G.O. Elektro-Gerätebau GmbH Control device for an electrical heating device for a cooking field, cooking field and method for operating such an electrical heating device
US20130146582A1 (en) * 2011-12-09 2013-06-13 E.G.O. Elektro-Gerätebau GmbH Heating Device, Cooking Field and Method for Operating a Heating Device
US8884195B2 (en) 2011-12-09 2014-11-11 E.G.O. Elektro-Gerätebau GmbH Heating device, method of producing a heating device and method for operating a heating device

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Publication number Priority date Publication date Assignee Title
DE2422684C3 (de) * 1974-05-10 1978-10-12 Karl 7519 Oberderdingen Fischer Schnappschalter
US4281237A (en) * 1979-03-05 1981-07-28 Sunbeam Corporation Safety circuit for electric bedcover
DE3007037A1 (de) * 1980-02-26 1981-09-03 Ego Elektro Blanc & Fischer Glaskeramik-kochgeraet
DE3378516D1 (en) * 1982-09-16 1988-12-22 Ego Elektro Blanc & Fischer Heating element, especially radiant heating element for the heating of ceramic plates
DE3410442A1 (de) 1983-09-17 1985-09-26 Ego Elektro Blanc & Fischer Temperaturfuehler, insbesondere fuer einen temperaturbegrenzer fuer eine glaskeramik-kocheinheit
US4788398A (en) * 1987-09-30 1988-11-29 General Electric Company Temperature sensor failure detection arrangement using a heater energy counter
DE4229375C2 (de) 1992-09-03 2000-05-04 Ego Elektro Blanc & Fischer Strahlungs-Heizkörper
US5308957A (en) * 1992-10-27 1994-05-03 Eaton Corporation Heater control system
DE19736308A1 (de) 1997-08-21 1999-02-25 Ego Elektro Geraetebau Gmbh Leistungssteuergerät

Also Published As

Publication number Publication date
PL1774831T3 (pl) 2015-12-31
ES2546791T3 (es) 2015-09-28
EP1774831A1 (de) 2007-04-18
US7180038B2 (en) 2007-02-20
WO2006015719A1 (de) 2006-02-16
US20060027564A1 (en) 2006-02-09

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