EP3386268B1 - A glass-ceramic cooking apparatus and a method relating to temperature limiting control for preventing cooking oil ignition - Google Patents

A glass-ceramic cooking apparatus and a method relating to temperature limiting control for preventing cooking oil ignition Download PDF

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Publication number
EP3386268B1
EP3386268B1 EP18181419.5A EP18181419A EP3386268B1 EP 3386268 B1 EP3386268 B1 EP 3386268B1 EP 18181419 A EP18181419 A EP 18181419A EP 3386268 B1 EP3386268 B1 EP 3386268B1
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EP
European Patent Office
Prior art keywords
temperature
glass
cooking
ceramic
heating element
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.)
Active
Application number
EP18181419.5A
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German (de)
English (en)
French (fr)
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EP3386268A2 (en
EP3386268A3 (en
Inventor
Yun Bai
Chunlei SHEN
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.)
Zhejiang Jiu Kang Electric Appliances Co Ltd
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Zhejiang Jiu Kang Electric Appliances Co Ltd
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.)
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Publication date
Application filed by Zhejiang Jiu Kang Electric Appliances Co Ltd filed Critical Zhejiang Jiu Kang Electric Appliances Co Ltd
Priority to PL18181419T priority Critical patent/PL3386268T3/pl
Priority to SI201830084T priority patent/SI3386268T1/sl
Priority to HUE18181419A priority patent/HUE049621T2/hu
Priority to RS20200745A priority patent/RS60473B1/sr
Priority to EP18181419.5A priority patent/EP3386268B1/en
Publication of EP3386268A2 publication Critical patent/EP3386268A2/en
Publication of EP3386268A3 publication Critical patent/EP3386268A3/en
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Publication of EP3386268B1 publication Critical patent/EP3386268B1/en
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/083—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on tops, hot plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/087—Arrangement or mounting of control or safety devices of electric circuits regulating heat
    • 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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0261—For cooking of food
    • H05B1/0266—Cooktops
    • 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 disclosure herein relates to the field of glass-ceramic cooking apparatuses with temperature limiting control function, in particular, to a temperature limiting of the glass heating area to prevent cooking oil ignition during cooking while still maintain the minimum oil temperature required for a desired cooking performance.
  • the glass-ceramic cooking apparatus has the advantages of simple structure, low manufacturing cost, reliability, and is easy to maintain, hence it is widely used.
  • the glass-ceramic cooking apparatus is internally provided with a standard temperature limiter connected in series with the heating source for limiting the temperature of the glass below 600°C/1112°F to prevent any possible damage to components inside the apparatus or the glass surface caused by the excessive temperature, but the limiter cannot prevent the cooking oil ignition during cooking.
  • US Patent 7307246 to Smolenski provides a system for detecting temperature of a cooking utensil over a radiant cooktop. But, it does not provide a solution for preventing the cooking oil ignition during cooking while still maintaining the minimum cooking temperature for a desired cooking performance.
  • US Patent 9132302 to Luongo provides a sensing device and an algorithm for preventing cooking oil ignition on gas cooktop, cooktop with coil surface and glass-ceramic cooktop. But, it does not disclose details on how this system works on a glass-ceramic apparatus, such as the sensor placing and wiring, temperature limits setup, control cycle timing, etc. In addition, the algorithm limits the cooking vessel bottom temperature remains below the oil ignition temperature, which is not an effect way to prevent the cooking oil ignition while still maintain a desired cooking performance.
  • GB Patent 2,325,533 by McWilliams provides a glass-ceramic cook top with predetermined temperature limits based on the temperature reached by the glass-ceramic. The document focuses on controlling and maintaining temperature level of the glass-ceramic surface itself
  • Prior devices such as that disclosed in the Luongo and McWilliams patents typically detect the temperature of the cookware based only on the temperature measured by the sensor under the glass, assume it is the real cooking oil temperature during cooking, and compare it with the cooking oil ignition temperature.
  • the measurement is heavily affected by the temperature transfer model from under the glass to the cooking oil in the cooking vessel, the temperature sensor design, the placement of the temperature sensor (for example, whether there is a direct contact between the sensor and the underside of the glass, or if there is a gap between the sensor and the glass), the heating element type and output power, and the cooking vessel type.
  • the cooking oil temperature cannot be effectively controlled, and the minimum oil temperature for a desired cooking performance cannot be maintained.
  • the present invention solves those problems.
  • the present invention is defined by the claims.
  • the invention provides a glass-ceramic cooking apparatus and a method relating to the glass heating area temperature limiting control, with which, the apparatus is capable of preventing the cooking oil ignition during cooking while still maintaining the minimum cooking temperature for a desired cooking performance.
  • the apparatus comprises a glass-ceramic surface for supporting and heating a cooking vessel, one or more heat elements mounted below the glass-ceramic; a temperature sensor for each heating element placed on an underside of the glass-ceramic for measuring the temperature of a glass heating area of the glass-ceramic; and a control unit which is electrically connected with each heating element for adjusting an output power of the heating element; the control unit configured to compare the temperature sensor's output against predetermined upper and lower temperature limits derived from an established relationship between the measured glass-ceramic temperature and a cooking oil temperature during cooking, whereby, in use, when the temperature output by the temperature sensor reaches the upper temperature limit, the control unit is configured to reduce the output power of the heating element, and when the temperature output by the temperature sensor reaches the lower temperature limit, the control unit is configured to increase output power of the heating element, such that, in use, the cooking oil temperature within the cooking vessel is controlled within the upper and lower temperature limits; characterised in that the temperature sensor comprises a temperature probe, insulation material and a ceramic casing, the
  • the real-time temperature of the cooking oil in the cooking vessel needs to be obtained by measuring the temperature of the glass heating area contacting with the cooking vessel.
  • the temperature transfer model for the temperature transferring from the underside of the glass heating area to the cooking vessel, then to the cooking oil can be established, and the temperature of the cooking oil within the cooking vessel can be obtained with the experimental temperature transfer model and the measured heating area temperature.
  • the upper and lower temperature limits are determined based on the experimental temperature transfer model, which take into account the temperature sensor design, the placement of the temperature sensor (for example, direct contact the glass bottom or with a gap), the heating element type and output power, the cooking vessel type, the cooking oil temperature ignition point and cooking performance requirement.
  • the control unit reduces the output power of the heating element so that the maximum temperature of the cooking oil is limited below the oil ignition point; when the temperature of the cooking oil in the cooking vessel drops to the minimum cooking temperature for a desired cooking performance, and the measured heating area temperature reaches the lower temperature limit, the control unit increases the output power of the heating element, hence increases temperature of the cooking oil to maintain the minimum cooking temperature required by a desired cooking. Accordingly, a controlled cycle of the temperature of the cooking oil and the power change of the heating element is formed, and the maximum temperature of the cooking oil is limited in a range below the cooking oil ignition point, while the apparatus still maintains a desired cooking performance.
  • a two-heating elements glass-ceramic cooktop comprises a glass surface 201, two radiant heating elements 103 under the glass with a temperature limiter 104 on each heating element, and two heating areas 202.
  • the temperature limiter comprises the temperature sensor and the control unit that is connected in series with the heating element.
  • the temperature sensor 303 with a long tube 105 (for some large heating elements) or a short tube 401(for some small heating elements) is made with expandable metal and is placed inside a multi-layer sleeve 301, which is formed by an inner thermal insulation layer, and an outer thermal insulation layer.
  • the inner insulation layer and the outer insulation layer may be made of ceramic or glass or steel.
  • a metal reflect coating is applied between two insulation layers.
  • the length of the outer heat insulation layer is shorter than or equal to the inner heat insulation layer.
  • the limiter's control unit 302 compares the measured temperature by the sensor with the predetermined upper and lower temperature limits, and then connects or disconnects the heating element power to control the cooking oil temperature in the cooking vessel.
  • the table below shows an example of the experimental temperature transfer model for this embodiment, wherein an expansion metal temperature sensor with a long tube, a steel inner insulation layer and a glass outer layer is placed cross the center of a 2300W radiant heating element and 1.5mm below the glass; a cast iron fry pan is used here; the minimum cooking temperature is defined as 250°C/482°F, which is the boiling point for most cooking oil; the temperature of the cooking oil in the cooking vessel is measured, and temperature limits of the temperature limiter are determined. Temperature measured by the sensor (°C) Temperature in the cooking oil (°C) Temperature limit (°C) 260 150 324 245 330; Lower temperature limit 400 285 510 340 505; Upper temperature limit
  • the temperature limiter disconnects the power of the heating element and causes the heating element to stop generating heat; when the measured temperature of the sensor is close to the lower temperature limit, 330°C/626°F, the limiter connects the power of the heating element causing the heating element to generate heat.
  • a controlled temperature cycle for the cooking oil in the cooking vessel is formed, and the maximum temperature of the cooking oil is limited below 340°C/644°F, which is below the cooking oil ignition point, typically 360°C/680°F to 400°C/752°F.
  • Changing the lower temperature limit will affect the timing of the controlled oil temperature cycle and the cooking temperature, which will meet different cooking performance requirements. For example, for users who prefer a high-temperature cooking, raising the lower temperature limit will shorten the controlled oil temperature cycle, and raise overall cooking temperature while still prevents the cooking oil ignition.
  • a two-heating elements glass-ceramic cooktop similar to that shown in Fig.1 with a standard temperature limiter 104, but also includes a temperature sensor 501 and a control unit integrated in the cooktop's control circuit 107.
  • the temperature sensor 501 may be mounted on the tube 105 of the temperature limiter 104, or a separate supporting tube. As shown in Figure 5 , the temperature sensor 501 has a temperature probe 602 surrounded by insulation material 603 that is compressed between the glass and the sensor's ceramic case 604.
  • the temperature sensor is glued on the underside of the glass heating area 202 or is pushed against the glass by an elastic device such as a coil spring or a leaf spring 608.
  • the insulation material surrounding the probe creates a heat insulation area, or cold area 502, on the heating area 202. Because the insulation material blocks the heat radiation from the heating element to the probe and the cold area, and glass-ceramic material is primarily radiative rather than conductive, the probe measures the cold area glass temperature, which has the main heat source transferring through the cold area glass from the cooking vessel sitting on the heating area.
  • the heating wire 609 is placed with an empty area, or a non-heating zone 605, right below the temperature sensor. The temperature sensor's output signal is sent through the heat resistant wires 606 to the control circuit 107 shown in Fig. 1 .
  • Fig. 7 shows an example of the flow chart illustrating the steps carried out by the control circuit.
  • the control unit compares predetermined upper and lower temperature limits with the measured glass temperature by the sensor, and then increases or reduces the power to the heating element to form a controlled temperature cycle.
  • the maximum temperature of the cooking oil is limited below the cooking oil ignition point while a desired cooking performance still maintains.
  • the temperature probe in this embodiment may be one or multi fiber optic temperature sensors, resistance temperature sensors, thermocouples, high temperature thermistors, polymer-derived ceramics (PDC) sensors, or any kind of temperature detectors, which is placed, or are distributed if using multi devices, on the underside of the glass.
  • the temperature probe may have an infrared coating applied on the probe surface to further improve the sensor performance.
  • the control unit in this embodiment may be a relay, a set of relays, or a silicon-controlled rectifier (SCR) to adjust the heating element output power.
  • SCR silicon-controlled rectifier
  • the table below shows an example of the experimental temperature transfer model for this embodiment, wherein a polymer-derived ceramics (PDC) temperature probe with 0.1mm infrared radiant coating applied on the probe surface contacting the glass is glued under the glass; the sensor is placed 35mm away from the heating element center and surrounded by 10mm ceramic fiber insulation layer; the control unit is a long-life DPST power relay; a 2300W radiant heating element and a cast iron fry pan are used in this example; the minimum cooking temperature is defined as 265°C/509°F, which is higher than the cooking oil boiling point, but below the typical cooking oil smoking point; the temperature of the cooking oil in the cooking vessel is measured, and temperature limits of the control unit are determined. Temperature measured by the probe (°C) Temperature in the cooking oil (°C) Temperature limit (°C) 190 150 318 265 325; Lower temperature limit 325 285 347 340 340; Upper temperature limit
  • the control unit when the measured temperature of the probe reaches the upper temperature limit, 340°C/644°F, whereby the temperature of the cooking oil reaches 340°C, the control unit reduces the power of the heating element, causing the heating element to generate less heat; when the measured temperature of the sensor is close to the lower temperature limit, 325°C/617°F, the control unit increases the power of the heating element, causing the heating element to generate more heat.
  • a controlled temperature cycle for the cooking oil in the cooking vessel is formed, and the maximum temperature of the cooking oil is limited below 340°C/644°F, which is below the cooking oil ignition point, while the apparatus still maintains the minimum cooking temperature, 265°C/509°F, for a desired cooking performance.
  • a two-heating elements glass-ceramic cooktop similar to that shown in Fig.1 with a standard temperature limiter 104, but also includes a 2-in-1 temperature controller 900, which integrates a temperature sensor 901 and a control unit 902 in a single device.
  • the temperature controller is surrounded by the insulation layer 903 that is compressed to the glass by the ceramic case 904.
  • the temperature controller may be mounted on the probe tube 105 of the temperature limiter 104 or a separate supporting tube.
  • the controller is glued on the underside of the heating area 202 or is pushed against the glass by an elastic device such as a coil spring 906.
  • the control unit is connected in series with the heating wire 609 through heat-resistant wire 905.
  • the insulation material generates a heat insulation area, or cold area 908 in the heating area 202.
  • the sensor contacting in direct with the glass measures the cold area glass temperature, which has the main heat source transferring through the cold area glass from the cooking vessel sitting on the heating area.
  • the heating wire 609 is placed with an empty area, or a non-heating zone right below the temperature controller.
  • the control unit compares predetermined upper and lower temperature limits with the measured temperature by the sensor, and then connects or disconnects the power of the heating element, hence the maximum temperature of the cooking oil in the cooking vessel is limited and the minimum oil temperature for a desired cooking is maintained.
  • the table below shows an example of the experimental temperature transfer model for this embodiment, where the temperature controller is a disc bimetallic thermostat and is glued on the underside of the glass heating area and 30mm away from the heating element center. A 10mm ceramic fiber insulation layer is placed between the thermostat and its outer ceramic case. A 0.1mm infrared coating is applied on the thermostat surface contacting the glass. A 2300W radiant heating element and a cast iron fry pan are used in this example. The minimum cooking temperature is defined as 265°C/509°F, which is higher than the cooking oil boiling point, but below the typical cooking oil smoking point. The temperature of the cooking oil in the cooking vessel is measured, and temperature limits of the control unit are determined. Temperature measured by the thermostat (°C) Temperature in the cooking oil (°C) Temperature limit (°C) 200 150 275 265 280; Lower temperature limit 310 285 380 340 375; Upper temperature limit
  • the thermostat when the measured temperature of the thermostat reaches the upper temperature limit, 375°C/7076°F, the thermostat disconnects the power of the heating element, causing the heating element to stop generating heat; when the measured temperature reaches the lower temperature limit, 280°C/536°F, the control unit connects the power of the heating element, causing the heating element to generate heat.
  • a controlled temperature cycle for the cooking oil in the cooking vessel is formed, and the maximum temperature of the cooking oil is limited below 340°C/644°F, which is below the cooking oil ignition point, while the apparatus still maintains the minimum cooking temperature, 265°C/509°F, for a desired cooking performance.
  • Fig. 9 shows another embodiment in accordance with the present invention, which is similar to the embodiment shown in Fig. 8 . But in this embodiment, the temperature controller 900 is placed in the center area of the heating element, and the temperature limiter's probe has a short tube 401.
  • the table below shows an example of the experimental temperature transfer model for this embodiment, where the temperature controller is a disc bimetallic thermostat and is glued on the underside of the heating area, and right below the center of the heating area. All other test conditions are the same as in the embodiment in Fig. 8 Temperature measured by the thermostat (°C) Temperature in the cooking oil (°C) Temperature limit (°C) 200 150 260 265 265; Lower temperature limit 300 285 340 340 335; Upper temperature limit
  • the thermostat when the measured temperature of the thermostat reaches the upper temperature limit, 335°C/635°F, the thermostat disconnects the power of the heating element causing the heating element to stop generating heat; when the measured temperature reaches the lower temperature limit, 265°C/509°F, the control unit connects the power of the heating element causing the heating element to generate heat.
  • a controlled temperature cycle for the cooking oil in the cooking vessel is formed, and the maximum temperature of the cooking oil is limited below 340°C/644°F, which is below the cooking oil ignition point, while the apparatus still maintains the minimum cooking temperature, 265°C/509°F, for a desired cooking performance.
  • the heating element of the glass-ceramic cooking apparatus has a rated output power between 500W and 3500W.
  • the heating element of the glass-ceramic cooking apparatus may be a radiant heating element, an infrared halogen lamp, or an induction heating element.
  • the glass-ceramic cooking apparatus may be a single or multi heating elements cooktop.
  • the glass-ceramic cooking apparatus may be a free-standing range with at least 4 heating elements and an oven under the cooktop.
  • the temperature controller or the control unit can shorten the controlled temperature cycle time, increase average cooking temperature, and the apparatus still be able to prevent the cooking oil ignition.
  • the apparatus can be configured to maintain 10-60 seconds cycle time, and keep a higher average cooking oil temperature, 300°C/572°F to 330°C/626°F, thereby achieves a desired cooking performance for users requiring higher cooking temperature, while still prevents the cooking oil ignition.
  • the glass-ceramic cooking apparatus may include a hot surface indicator 204 shown in Fig. 2 , which is controlled by the control circuit 107, to warn the user that the glass heating area is hot.
  • the control circuit receives the measured temperature from a temperature sensor, which measures the temperature under the heating area, and then calculates the temperature of the heating area based on an experimental temperature transfer model. If the temperature of the heating area is higher than a pre-set point, for example 50°C/122°F ⁇ 60°C/140°F, the indicator is turned on until the heating area temperature is below the pre-set point, and then is turned off.
  • a pre-set point for example 50°C/122°F ⁇ 60°C/140°F
  • the glass-ceramic cooking apparatus may include an automatic shutdown function. After a heating element is turned on, and the power selector 203 is set to the maximum power, if the power selector of any heating element is not changed within a pre-set period by the user, for example 60 minutes, the apparatus automatically turns off all heating elements; the pre-set period may be extended, for example 60 to 120 minutes if the power selector is set to a point between the minimum power and the maximum power.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)
EP18181419.5A 2018-07-03 2018-07-03 A glass-ceramic cooking apparatus and a method relating to temperature limiting control for preventing cooking oil ignition Active EP3386268B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PL18181419T PL3386268T3 (pl) 2018-07-03 2018-07-03 Szklano-ceramiczne urządzenie do gotowania oraz sposób związany z kontrolą ograniczenia temperatury w celu zapobiegania zapaleniu się oleju do gotowania
SI201830084T SI3386268T1 (sl) 2018-07-03 2018-07-03 Steklokeramični kuhalni aparat in postopek, ki se nanaša na krmiljenje omejevanja temperature za preprečevanje vžiga olja za kuhanje
HUE18181419A HUE049621T2 (hu) 2018-07-03 2018-07-03 Üvegkerámia fõzõberendezés, valamint hõmérséklet-határoló szabályozással kapcsolatos eljárás fõzõolaj meggyulladásának megelõzésére
RS20200745A RS60473B1 (sr) 2018-07-03 2018-07-03 Staklokeramički uređaj za kuvanje i postupak koji se odnosi na kontrolu ograničenja temperature radi sprečavanja zapaljenja ulja za kuvanje
EP18181419.5A EP3386268B1 (en) 2018-07-03 2018-07-03 A glass-ceramic cooking apparatus and a method relating to temperature limiting control for preventing cooking oil ignition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18181419.5A EP3386268B1 (en) 2018-07-03 2018-07-03 A glass-ceramic cooking apparatus and a method relating to temperature limiting control for preventing cooking oil ignition

Publications (3)

Publication Number Publication Date
EP3386268A2 EP3386268A2 (en) 2018-10-10
EP3386268A3 EP3386268A3 (en) 2019-03-06
EP3386268B1 true EP3386268B1 (en) 2020-04-15

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EP18181419.5A Active EP3386268B1 (en) 2018-07-03 2018-07-03 A glass-ceramic cooking apparatus and a method relating to temperature limiting control for preventing cooking oil ignition

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EP (1) EP3386268B1 (sr)
HU (1) HUE049621T2 (sr)
PL (1) PL3386268T3 (sr)
RS (1) RS60473B1 (sr)
SI (1) SI3386268T1 (sr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019109409A1 (de) * 2019-04-10 2020-10-15 Miele & Cie. Kg Sicherheitsvorrichtung für ein Kochfeld und Verfahren für deren Betrieb

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5628242A (en) * 1996-09-05 1997-05-13 Higley; John E. Gas grill with automatic shut off controlled by dynamic activity sensor
GB2325533B (en) * 1997-05-22 2001-08-08 Ceramaspeed Ltd Method and apparatus for controlling an electric heater
US20030192873A1 (en) * 2001-02-21 2003-10-16 Lerner William S. Heat warning safety device using light emitting diodes
GB0214036D0 (en) * 2002-06-19 2002-07-31 Ceramaspeed Ltd Temperature-limiting device
US7307246B2 (en) 2004-06-28 2007-12-11 General Electric Company System and method of detecting temperature of a cooking utensil over a radiant cooktop
US9132302B2 (en) 2012-08-14 2015-09-15 Primaira, Llc Device and method for cooktop fire mitigation

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* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
SI3386268T1 (sl) 2020-08-31
RS60473B1 (sr) 2020-08-31
EP3386268A2 (en) 2018-10-10
EP3386268A3 (en) 2019-03-06
HUE049621T2 (hu) 2020-09-28
PL3386268T3 (pl) 2020-10-05

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