WO2015096927A1 - An induction cooker, the safe utilization of which is provided - Google Patents

An induction cooker, the safe utilization of which is provided Download PDF

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Publication number
WO2015096927A1
WO2015096927A1 PCT/EP2014/073349 EP2014073349W WO2015096927A1 WO 2015096927 A1 WO2015096927 A1 WO 2015096927A1 EP 2014073349 W EP2014073349 W EP 2014073349W WO 2015096927 A1 WO2015096927 A1 WO 2015096927A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooktop
sensor
induction
cooker
induction coil
Prior art date
Application number
PCT/EP2014/073349
Other languages
French (fr)
Inventor
Gamze DAG
Caglar VARAN
Sinan BABA
Yasin Sedat Yirmili
Ugur Camli
Selcuk SOYYIGIT
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2015096927A1 publication Critical patent/WO2015096927A1/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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H05B6/1263—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements using coil cooling arrangements
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • 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 present invention relates to an induction cooker that is enabled to operate in a safe manner.
  • the induction cooker functions according to the principle of heating a cast iron or steel ferromagnetic cooking container with the magnetic field generated by the induction coil. During the heating process, the surfaces of the induction coils reach high temperatures. The induction coil temperature is kept under control in order to enable the induction cooker to operate in safe conditions. The current passing over the induction coil is cut off when the induction coil temperature reaches the critical temperature value predetermined by the producer. Therefore, it is critical for safe utilization to accurately measure the actual induction coil temperature.
  • the aim of the present invention is the realization of an induction cooker that is enabled to operate in a safe manner by measuring the temperature of the induction coils as close as possible to the actual values.
  • the induction cooker realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises more than one induction coil that enables the cooking process to be performed by creating a magnetic field, a cooktop disposed over the induction coils so as to conceal the induction coils, whereon the cooking containers are placed, a fan disposed below the cooktop and providing the cooling of the induction coils, and a sensor that is connected to the circuit board and that measures the induction coil temperature.
  • the sensor of the present invention is produced integrated with the cooktop and thus is isolated from the cooling air by being moved away from the fan that remains inside the casing. Thus, the sensor is enabled to measure the temperature of the induction coil more accurately. By means of the present invention, it is ensured that the temperature of the induction coil does not exceed the safe temperature limits predetermined by the producer and the cooking effectiveness of the induction cooker is increased.
  • the senor is printed on the cooktop by means of serigraphy method.
  • the senor is disposed on the cooktop at the center of the induction coils.
  • the heat that is emitted from the induction coils is enabled to spread homogeneously on the cooktop.
  • the induction cooker comprises a cable that provides transfer of energy and data between the sensor and the circuit board.
  • the cooktop is produced from tempered glass material.
  • the senor is shaped as a ring or half ring.
  • the senor is spiral.
  • Figure 1 – is the schematic view of a cooker.
  • Figure 2 – is the top view of a cooker, induction coils, a fan and a cable.
  • the induction cooker (1) comprises a cooktop (2) produced from a material like glass or ceramic, suitable to place the cooking container thereon, more than one induction coil (3) disposed under the cooktop (2) and providing the heating of the cooking container with ferromagnetic features by creating a magnetic field, at least one circuit board (4) enabling the induction coils (3) to be energized, a fan (5) that is disposed under the cooktop (2) and that cools the induction coil (3), and at least one sensor (6) that is connected to the circuit board (4) and that measures the temperature of the induction coil (3).
  • the fan (5) enables the temperature of the induction coils (3) to remain below a critical temperature value predetermined by the producer by cooling the induction coil (3).
  • the induction coils (3) are prevented from overheating above the determined limits, providing safe operating conditions with respect to the user.
  • the sensor (6) of the present invention is produced integrated with the cooktop (2) and thus is moved away from the fan (5).
  • the sensor (6) measurement accuracy which is critical for safe utilization of the induction cooker (1) is increased by isolating the sensor (6) from the fan (5).
  • the heat energy emitted to the cooktop (2) from the induction coil (3) forms a resistance on the sensor (6) with a lesser amount of loss.
  • the senor (6) is printed on the cooktop (2) by means of serigraphy method.
  • the senor (6) is embedded into the cooktop (2). In this embodiment, the sensor (6) is almost completely covered by the cooktop (2) and is isolated from the fan (5).
  • the senor (6) is disposed almost at the center of the cooktop (2). By means of placing the sensor (6) almost at the center of the cooktop (2), the heat spread effectively on the cooktop (2) is enabled to be measured more accurately.
  • the induction cooker (1) comprises a cable (7) that connects the sensor (6) to the circuit board (4).
  • the cable (7) is soldered to the cooktop (2) and extends between the sensor (6) and the circuit board (4).
  • the cable (7) provides transfer of data and energy between the sensor (6) and the circuit board (4).
  • the cooktop (2) is produced from tempered glass material that has high mechanical strength and thermal resistance.
  • the senor (6) is preferably shaped as a ring or half ring.
  • the sensor (6) can be printed easily on the cooktop (2) and occupy less space on the cooktop (2).
  • the senor (6) is spiral.
  • the senor (6) is joined with the cooktop (2) and is moved away and isolated from the fan (5) disposed inside the casing of the cooker (1). Consequently, the difference between the measured induction coil (3) temperature and the actual induction coil (3) temperature is decreased and the measurement accuracy of the sensor (6) is increased.
  • the measured induction coil (3) temperature is prevented from being measured less than the actual induction coil (3) temperature due to effect of the fan (5). Consequently, the temperature controls performed so as to prevent the induction coil (3) temperature from exceeding the safe temperature limits predetermined by the producer are rendered reliable.

Abstract

The present invention relates to an induction cooker (1) comprising a cooktop (2) whereon the cooking container is placed, more than one induction coil (3) disposed under the cooktop (2) and providing the heating of the cooking container placed on the cooktop (2) by creating a magnetic field, at least one circuit board (4) enabling the induction coils (3) to be energized, a fan (5) that is disposed under the cooktop (2) and that cools the induction coil (3), and at least one sensor (6) that is connected to the circuit board (4) and that measures the temperature of the induction coil (3).

Description

AN INDUCTION COOKER, THE SAFE UTILIZATION OF WHICH IS PROVIDED
The present invention relates to an induction cooker that is enabled to operate in a safe manner.
The induction cooker functions according to the principle of heating a cast iron or steel ferromagnetic cooking container with the magnetic field generated by the induction coil. During the heating process, the surfaces of the induction coils reach high temperatures. The induction coil temperature is kept under control in order to enable the induction cooker to operate in safe conditions. The current passing over the induction coil is cut off when the induction coil temperature reaches the critical temperature value predetermined by the producer. Therefore, it is critical for safe utilization to accurately measure the actual induction coil temperature.
In the state of the art Chinese Utility Model Application No. CN201945401, an induction cooker is disclosed, wherein the temperature measurement precision is improved by using two temperature sensors that are insulated from one another in two separate encapsulations.
The aim of the present invention is the realization of an induction cooker that is enabled to operate in a safe manner by measuring the temperature of the induction coils as close as possible to the actual values.
The induction cooker, realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises more than one induction coil that enables the cooking process to be performed by creating a magnetic field, a cooktop disposed over the induction coils so as to conceal the induction coils, whereon the cooking containers are placed, a fan disposed below the cooktop and providing the cooling of the induction coils, and a sensor that is connected to the circuit board and that measures the induction coil temperature. The sensor of the present invention is produced integrated with the cooktop and thus is isolated from the cooling air by being moved away from the fan that remains inside the casing. Thus, the sensor is enabled to measure the temperature of the induction coil more accurately. By means of the present invention, it is ensured that the temperature of the induction coil does not exceed the safe temperature limits predetermined by the producer and the cooking effectiveness of the induction cooker is increased.
In an embodiment of the present invention, the sensor is printed on the cooktop by means of serigraphy method.
In an embodiment of the present invention, the sensor is disposed on the cooktop at the center of the induction coils. Thus, the heat that is emitted from the induction coils is enabled to spread homogeneously on the cooktop.
In an embodiment of the present invention, the induction cooker comprises a cable that provides transfer of energy and data between the sensor and the circuit board.
In an embodiment of the present invention, the cooktop is produced from tempered glass material.
In an embodiment of the present invention, the sensor is shaped as a ring or half ring.
In another embodiment of the present invention, the sensor is spiral.
The induction cooker realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 – is the schematic view of a cooker.
Figure 2 – is the top view of a cooker, induction coils, a fan and a cable.
The elements illustrated in the figures are numbered as follows:
  1. Induction cooker
  2. Cooktop
  3. Induction coil
  4. Circuit board
  5. Fan
  6. Sensor
  7. Cable
The induction cooker (1) comprises a cooktop (2) produced from a material like glass or ceramic, suitable to place the cooking container thereon, more than one induction coil (3) disposed under the cooktop (2) and providing the heating of the cooking container with ferromagnetic features by creating a magnetic field, at least one circuit board (4) enabling the induction coils (3) to be energized, a fan (5) that is disposed under the cooktop (2) and that cools the induction coil (3), and at least one sensor (6) that is connected to the circuit board (4) and that measures the temperature of the induction coil (3). The fan (5) enables the temperature of the induction coils (3) to remain below a critical temperature value predetermined by the producer by cooling the induction coil (3). Thus, the induction coils (3) are prevented from overheating above the determined limits, providing safe operating conditions with respect to the user.
The sensor (6) of the present invention is produced integrated with the cooktop (2) and thus is moved away from the fan (5). The sensor (6) measurement accuracy which is critical for safe utilization of the induction cooker (1) is increased by isolating the sensor (6) from the fan (5). The heat energy emitted to the cooktop (2) from the induction coil (3) forms a resistance on the sensor (6) with a lesser amount of loss.
In an embodiment of the present invention, the sensor (6) is printed on the cooktop (2) by means of serigraphy method.
In an embodiment of the present invention, the sensor (6) is embedded into the cooktop (2). In this embodiment, the sensor (6) is almost completely covered by the cooktop (2) and is isolated from the fan (5).
In an embodiment of the present invention, the sensor (6) is disposed almost at the center of the cooktop (2). By means of placing the sensor (6) almost at the center of the cooktop (2), the heat spread effectively on the cooktop (2) is enabled to be measured more accurately.
In an embodiment of the present invention, the induction cooker (1) comprises a cable (7) that connects the sensor (6) to the circuit board (4). The cable (7) is soldered to the cooktop (2) and extends between the sensor (6) and the circuit board (4). The cable (7) provides transfer of data and energy between the sensor (6) and the circuit board (4).
In an embodiment of the present invention, the cooktop (2) is produced from tempered glass material that has high mechanical strength and thermal resistance.
In an embodiment of the present invention, the sensor (6) is preferably shaped as a ring or half ring. Thus, the sensor (6) can be printed easily on the cooktop (2) and occupy less space on the cooktop (2).
In an embodiment of the present invention, the sensor (6) is spiral.
By means of the present invention, the sensor (6) is joined with the cooktop (2) and is moved away and isolated from the fan (5) disposed inside the casing of the cooker (1). Consequently, the difference between the measured induction coil (3) temperature and the actual induction coil (3) temperature is decreased and the measurement accuracy of the sensor (6) is increased. The measured induction coil (3) temperature is prevented from being measured less than the actual induction coil (3) temperature due to effect of the fan (5). Consequently, the temperature controls performed so as to prevent the induction coil (3) temperature from exceeding the safe temperature limits predetermined by the producer are rendered reliable.

Claims (7)

  1. An induction cooker (1) comprising a cooktop (2) whereon the cooking container is placed, more than one induction coil (3) disposed under the cooktop (2) and providing the heating of the cooking container placed on the cooktop (2) by creating a magnetic field, at least one circuit board (4) enabling the induction coils (3) to be energized, a fan (5) that is disposed under the cooktop (2) and that cools the induction coil (3), and at least one sensor (6) that is connected to the circuit board (4) and that measures the temperature of the induction coil (3), characterized by the sensor (6) that is moved away from the fan (5) by being produced integrated with the cooktop (2).
  2. An induction cooker (1) as in Claim 1, characterized by the sensor (6) that is printed on the cooktop (2) by means of serigraphy method.
  3. An induction cooker (1) as in Claim 1, characterized by the sensor (6) that is embedded into the cooktop (2).
  4. An induction cooker (1) as in any one of the Claims 1 to 3, characterized by the sensor (6) that is disposed almost at the center of the cooktop (2).
  5. An induction cooker (1) as in any one of the above claims, characterized by a cable (7) that connects the sensor (6) to the circuit board (4).
  6. An induction cooker (1) as in any one of the above claims, characterized by the cooktop (2) that is produced from tempered glass.
  7. A cooker (1) as in any one of the above claims, characterized by the ring- or half ring-shaped sensor(6).
PCT/EP2014/073349 2013-12-27 2014-10-30 An induction cooker, the safe utilization of which is provided WO2015096927A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2013/15397 2013-12-27
TR201315397 2013-12-27

Publications (1)

Publication Number Publication Date
WO2015096927A1 true WO2015096927A1 (en) 2015-07-02

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Application Number Title Priority Date Filing Date
PCT/EP2014/073349 WO2015096927A1 (en) 2013-12-27 2014-10-30 An induction cooker, the safe utilization of which is provided

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201351944Y (en) * 2008-12-29 2009-11-25 浙江苏泊尔家电制造有限公司 Induction cooker with coil temperature protector
JP2011090795A (en) * 2009-10-20 2011-05-06 Mitsubishi Electric Corp Electromagnetic induction heating cooker
CN201945401U (en) 2011-02-22 2011-08-24 肇庆爱晟电子科技有限公司 High-precision three-wire double-probe quick-induction sensor
EP2413659A1 (en) * 2010-07-28 2012-02-01 Samsung Electronics Co., Ltd. Temperature sensor and induction heating cooker having the same
WO2012035494A1 (en) * 2010-09-13 2012-03-22 University Of Cape Town Printed temperature sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201351944Y (en) * 2008-12-29 2009-11-25 浙江苏泊尔家电制造有限公司 Induction cooker with coil temperature protector
JP2011090795A (en) * 2009-10-20 2011-05-06 Mitsubishi Electric Corp Electromagnetic induction heating cooker
EP2413659A1 (en) * 2010-07-28 2012-02-01 Samsung Electronics Co., Ltd. Temperature sensor and induction heating cooker having the same
WO2012035494A1 (en) * 2010-09-13 2012-03-22 University Of Cape Town Printed temperature sensor
CN201945401U (en) 2011-02-22 2011-08-24 肇庆爱晟电子科技有限公司 High-precision three-wire double-probe quick-induction sensor

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