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WO2014068645A1 - Cuisinière à induction - Google Patents

Cuisinière à induction Download PDF

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Publication number
WO2014068645A1
WO2014068645A1 PCT/JP2012/077941 JP2012077941W WO2014068645A1 WO 2014068645 A1 WO2014068645 A1 WO 2014068645A1 JP 2012077941 W JP2012077941 W JP 2012077941W WO 2014068645 A1 WO2014068645 A1 WO 2014068645A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating
input current
change
heated
induction heating
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.)
Ceased
Application number
PCT/JP2012/077941
Other languages
English (en)
Japanese (ja)
Inventor
吉野　勇人
浩志郎 ▲高▼野
雄一郎 伊藤
西　健一郎
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.)
Mitsubishi Electric Home Appliance Co Ltd
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Home Appliance Co Ltd
Mitsubishi Electric Corp
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 Mitsubishi Electric Home Appliance Co Ltd, Mitsubishi Electric Corp filed Critical Mitsubishi Electric Home Appliance Co Ltd
Priority to PCT/JP2012/077941 priority Critical patent/WO2014068645A1/fr
Priority to JP2014544330A priority patent/JP5921707B2/ja
Priority to PCT/JP2013/056914 priority patent/WO2014069009A1/fr
Publication of WO2014068645A1 publication Critical patent/WO2014068645A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • 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

  • This invention relates to an induction heating cooker.
  • Some conventional induction heating cookers determine the temperature of an object to be heated based on the input current or control amount of an inverter. For example, it has a control means for controlling the inverter so that the input current of the inverter becomes constant, and when the control amount changes more than a predetermined amount within a predetermined time, the temperature change of the object to be heated is determined to be large.
  • An induction heating cooker that suppresses the output of an inverter has been proposed (see, for example, Patent Document 1).
  • a temperature detection device for an induction heating cooker comprising temperature determination processing means for determining a temperature corresponding to the change amount of the input current detected by the input current change amount detection means for detecting only the change amount of the input current Has been proposed (see, for example, Patent Document 2).
  • JP 2008-181892 A page 3 to page 5, FIG. 1
  • Japanese Patent Laid-Open No. 5-62773 pages 2 to 3, FIG. 1
  • the present invention has been made to solve the above-described problems, and provides an induction heating cooker that can detect a temperature change of a heated object regardless of the material of the heated object. Moreover, the highly reliable induction heating cooking appliance which suppressed the increase in input current is obtained.
  • An induction heating cooker includes a heating coil that induction-heats an object to be heated, a DC power supply circuit that converts an AC voltage from an AC power supply into a DC voltage, and a DC voltage from the DC power supply circuit to high-frequency power.
  • a drive circuit that converts and supplies the heating coil, load determination means that performs load determination processing of the heating coil, and a control unit that controls driving of the drive circuit and controls high-frequency power supplied to the heating coil
  • the control unit drives the drive circuit according to the determination result of the load determination unit, and the AC voltage from the AC power supply or the DC power supply in a state where the drive frequency of the drive circuit is fixed.
  • a predetermined time of a value based on a primary voltage value corresponding to a DC voltage of the circuit and a current value of at least one of an input current to the drive circuit and a coil current flowing in the heating coil Determine the amount of change or, based on the amount of change per predetermined time, the which detects the temperature change of the heated object.
  • This invention can detect the temperature change of the heated object regardless of the material of the heated object. Further, an increase in input current can be suppressed, and reliability can be improved.
  • FIG. It is a disassembled perspective view which shows the induction heating cooking appliance which concerns on Embodiment 1.
  • FIG. It is a figure which shows the drive circuit of the induction heating cooking appliance which concerns on Embodiment 1.
  • FIG. It is a load discrimination
  • FIG. It is an interphase figure of the input current with respect to the drive frequency at the time of the temperature change of the to-be-heated material of the induction heating cooking appliance which concerns on Embodiment 1.
  • FIG. It is the figure which expanded the part shown with the broken line of FIG.
  • FIG. 1 It is a figure which shows the relationship between the drive frequency of the induction heating cooking appliance which concerns on Embodiment 1, temperature, input current, and time. It is a figure which shows the relationship between the drive frequency of the induction heating cooking appliance which concerns on Embodiment 1, temperature, input current, an input electric current correction value, and time. It is a figure which shows another drive circuit of the induction heating cooking appliance which concerns on Embodiment 1.
  • FIG. (Constitution) 1 is an exploded perspective view showing an induction heating cooker according to Embodiment 1.
  • an induction heating cooker 100 has a top plate 4 on which an object to be heated 5 such as a pan is placed.
  • the top plate 4 includes a first heating port 1, a second heating port 2, and a third heating port 3 as heating ports for inductively heating the object to be heated 5, and corresponds to each heating port.
  • the first heating unit 11, the second heating unit 12, and the third heating unit 13 are provided, and the object to be heated 5 can be placed on each heating port to perform induction heating. Is.
  • the first heating means 11 and the second heating means 12 are provided side by side on the front side of the main body, and the third heating means 13 is provided at substantially the center on the back side of the main body.
  • positioning of each heating port is not restricted to this.
  • three heating ports may be arranged side by side in a substantially straight line.
  • the top plate 4 is entirely made of a material that transmits infrared rays, such as heat-resistant tempered glass or crystallized glass, and a rubber packing or sealing material is interposed between the upper surface and the outer periphery of the upper surface of the induction heating cooker 100 main body. Fixed in a watertight state.
  • the top plate 4 has a circular pan showing a rough placement position of the pan corresponding to the heating range (heating port) of the first heating unit 11, the second heating unit 12 and the third heating unit 13.
  • the position display is formed by applying paint or printing.
  • a heating power and cooking menu (boiling mode, fried food mode when heating the article 5 to be heated by the first heating means 11, the second heating means 12, and the third heating means 13. Etc.) are provided as an input device for setting the operation unit 40a, the operation unit 40b, and the operation unit 40c (hereinafter may be collectively referred to as the operation unit 40). Further, in the vicinity of the operation unit 40, as the notification unit 42, a display unit 41a, a display unit 41b, and a display unit 41c for displaying the operation state of the induction heating cooker 100, the input / operation content from the operation unit 40, and the like. Is provided. Note that the operation units 40a to 40c and the display units 41a to 41c are not particularly limited, for example, when the operation units 40a and 41c are provided for each heating port, or when the operation unit 40 and the display unit 41 are provided collectively.
  • a first heating means 11, a second heating means 12, and a third heating means 13 are provided below the top plate 4 and inside the main body, and each heating means is a heating coil (not shown). Z).
  • the control unit 45 for controlling the overall operation of the induction heating cooker 100.
  • the control unit 45 in the present embodiment constitutes a “control unit” and a “load determination unit” in the present invention.
  • the heating coil has a substantially circular planar shape, and is configured by winding a conductive wire made of an arbitrary metal with an insulating film (for example, copper, aluminum, etc.) in the circumferential direction. Is supplied to each heating coil, whereby an induction heating operation is performed.
  • FIG. 2 is a diagram illustrating a drive circuit of the induction heating cooker according to the first embodiment.
  • the drive circuit 50 is provided for every heating means, and the structure is the same. In FIG. 2, only one drive circuit 50 is shown.
  • the drive circuit 50 includes a DC power supply circuit 22, an inverter circuit 23, and a resonance capacitor 24a.
  • the input current detection means 25a detects a current input from the AC power supply (commercial power supply) 21 to the DC power supply circuit 22 and outputs a voltage signal corresponding to the input current value to the control unit 45.
  • the DC power supply circuit 22 includes a diode bridge 22a, a reactor 22b, and a smoothing capacitor 22c, converts an AC voltage input from the AC power supply 21 into a DC voltage, and outputs the DC voltage to the inverter circuit 23.
  • the primary voltage detection means 35 is configured by connecting a resistor 35a and a resistor 35b in series.
  • the primary voltage detection means 35 detects a primary voltage value (voltage division ratio) corresponding to the DC voltage of the DC power supply circuit 22 from the resistance ratio of the resistors 35 a and 35 b and inputs the detected voltage value to the control unit 45.
  • the primary voltage detection means 35 is provided on the output side of the diode bridge 22a.
  • the present invention is not limited to this, and the AC voltage from the AC power supply 21 or the DC of the DC power supply circuit 22 is not limited thereto. What is necessary is just to detect the primary voltage value according to the voltage. For example, you may detect the alternating voltage of the alternating current power supply 21 as a primary voltage value. Further, for example, the output of the smoothing capacitor 22c may be detected as the primary voltage value.
  • the inverter circuit 23 is a so-called half-bridge type inverter in which IGBTs 23a and 23b as switching elements are connected in series to the output of the DC power supply circuit 22, and diodes 23c and 23d are parallel to the IGBTs 23a and 23b as flywheel diodes, respectively. It is connected to the.
  • the inverter circuit 23 converts the DC power output from the DC power supply circuit 22 into a high-frequency AC power of about 20 kHz to 50 kHz, and supplies the AC power to the resonance circuit including the heating coil 11a and the resonance capacitor 24a.
  • the IGBTs 23a and 23b which are switching elements, are composed of, for example, a silicon-based semiconductor, but may be configured using a wide band gap semiconductor such as silicon carbide or a gallium nitride-based material.
  • the coil current detection means 25b is connected between the heating coil 11a and the resonance capacitor 24a.
  • the coil current detection unit 25b detects the peak of the current flowing through the heating coil 11a and outputs a voltage signal corresponding to the peak value of the heating coil current to the control unit 45.
  • the temperature detection means 30 is composed of, for example, a thermistor, and detects the temperature by the heat transferred from the heated object 5 to the top plate 4.
  • control unit 45 load determination means
  • FIG. 3 is a load discrimination characteristic diagram of an object to be heated based on the relationship between the heating coil current and the input current in the induction heating cooker according to the first embodiment.
  • the material of the heated object 5 (pan) serving as a load is largely divided into a magnetic material such as iron or SUS430, a high resistance nonmagnetic material such as SUS304, and a low resistance nonmagnetic material such as aluminum or copper. Separated.
  • the relationship between the coil current and the input current differs depending on the material of the pan load placed on the top plate 4.
  • the control unit 45 stores therein in advance a load determination table in which the relationship between the coil current and the input current shown in FIG. 3 is tabulated. By storing the load determination table therein, the load determination means can be configured with an inexpensive configuration.
  • the control unit 45 drives the inverter circuit 23 with a specific drive signal for load determination, and detects the input current from the output signal of the input current detection means 25a. At the same time, the control unit 45 detects the coil current from the output signal of the coil current detection means 25b.
  • the control part 45 determines the material of the to-be-heated material (pan) 5 mounted from the detected coil current and input current, and the load determination table showing the relationship of FIG. Thus, the control part 45 (load determination means) determines the material of the article 5 to be heated placed on the heating coil 11a based on the correlation between the input current and the coil current.
  • control unit 45 After performing the above load determination processing, the control unit 45 performs a control operation based on the load determination result.
  • the induction heating cooker 100 When the load determination result is a low-resistance non-magnetic material, the induction heating cooker 100 according to the first embodiment cannot be heated. Encourage people to change the pan.
  • the notification means 42 is notified that heating is impossible, and the user is prompted to place the pan.
  • these pans are materials that can be heated by the induction heating cooker 100 of the first embodiment, and thus the control unit 45 has determined.
  • This drive frequency is set to a frequency higher than the resonance frequency so that the input current does not become excessive.
  • the drive frequency can be determined by referring to a frequency table or the like corresponding to the material of the article 5 to be heated and the set heating power, for example.
  • the control unit 45 fixes the determined drive frequency and drives the inverter circuit 23 to start the induction heating operation.
  • FIG. 4 is a phase diagram of the input current with respect to the drive frequency when the temperature of the heated object of the induction heating cooker according to Embodiment 1 is changed.
  • a thin line is a characteristic when the to-be-heated object 5 (pan) is low temperature
  • a thick line is a characteristic when the to-be-heated object 5 is high temperature.
  • the characteristics change depending on the temperature of the object to be heated 5 because the resistivity of the object to be heated 5 increases and the magnetic permeability decreases due to the temperature rise, so that the heating coil 11a and the object to be heated are heated. This is because the magnetic coupling of the object 5 changes.
  • a frequency higher than the frequency at which the input current shown in FIG. 4 is maximized is determined as the driving frequency, and this driving frequency is fixed and the inverter circuit 23 is controlled.
  • FIG. 5 is an enlarged view of a portion indicated by a broken line in FIG.
  • the input current value (operating point) at the drive frequency increases as the heated object 5 changes from low temperature to high temperature.
  • the point A changes from point A to point B, and the input current gradually decreases as the temperature of the article to be heated 5 rises.
  • the control unit 45 obtains a change amount (time change) of the input current per predetermined time with the drive frequency of the inverter circuit 23 fixed, and based on the change amount per predetermined time, the object to be heated 5 Detects temperature changes in
  • the material of the to-be-heated object 5 mounted above the heating coil 11a is determined, the drive frequency of the inverter circuit 23 is determined according to the material of the to-be-heated object 5, and the inverter circuit 23 is determined by the drive frequency. Drive.
  • the inverter circuit 23 can be fixed and driven by the drive frequency according to the material of the to-be-heated material 5, and the increase in input current can be suppressed. Therefore, the high temperature of the inverter circuit 23 can be suppressed and the reliability can be improved.
  • control unit 45 performs a load determination process, determines a drive frequency corresponding to the determined pan material, drives the inverter circuit 23 with the determined drive frequency fixed, and performs an induction heating operation. carry out. And the control part 45 judges completion of boiling by the time change of input current.
  • the elapsed time and the change of each characteristic when performing water boiling will be described with reference to FIG.
  • FIG. 6 is a diagram showing the relationship between the drive frequency, temperature, input current and time of the induction heating cooker according to the first embodiment.
  • FIG. 6 the elapsed time and the change of each characteristic when water is poured into the article to be heated 5 and the boiling of water are shown
  • FIG. 6 (a) shows the driving frequency
  • FIG. 6 (b) shows the temperature ( Water temperature)
  • FIG. 6 (c) shows the input current.
  • the inverter circuit 23 is controlled with the drive frequency fixed.
  • the temperature (water temperature) of the article to be heated 5 gradually rises until it boils, and when it boils, the temperature becomes constant.
  • the input current gradually decreases as the temperature of the article 5 to be heated increases, and when the water boils and the temperature becomes constant, the input current also becomes constant. That is, when the input current becomes constant, the water boils and the boiling is completed.
  • control unit 45 in the present embodiment obtains a change amount (time change) of the input current per predetermined time with the drive frequency of the inverter circuit 23 fixed, and the change amount per predetermined time.
  • the value becomes equal to or less than the predetermined value it is determined that the water heater has been completed.
  • the predetermined value information may be set in the control unit 45 in advance, or may be input from the operation unit 40 or the like.
  • reports that the kettle was completed using the alerting
  • the notification means 42 is not particularly limited, for example, displaying the completion of boiling on the display unit 41 or notifying the user by voice using a speaker (not shown).
  • the notification means 42 notifies the completion of boiling. For this reason, it is possible to promptly notify the completion of boiling of water, and an easy-to-use induction heating cooker can be obtained.
  • the input current depends on the value of the DC voltage (primary voltage) of the DC power supply circuit 22, and even if the temperature of the article to be heated 5 is the same, the input current is high if the primary voltage is high and the primary voltage is low. Input current is also reduced. For this reason, when the AC voltage value of the AC power supply 21 (commercial power supply) changes during the control operation, the DC voltage of the DC power supply circuit 22 also changes, and the input current changes accordingly. In the water heating mode 1 control operation described above, the completion of the water heating is determined based on the amount of change in the input current per predetermined time. Or it may not be possible to detect the completion of boiling without the input current being constant.
  • the control unit 45 divides the input current detected by the input current detection means 25a by the DC voltage (primary voltage) detected by the primary voltage detection means 35, whereby the ratio of the input current to the primary voltage ( Hereinafter, “input current correction value”) is calculated. Then, the amount of change per predetermined time of the input current correction value is detected, and when the amount of change becomes equal to or less than a predetermined value (substantially constant), it is determined that the water has boiled and boiling is completed. Details of such operation will be described with reference to FIG.
  • FIG. 7 is a diagram showing the relationship between the drive frequency, temperature, input current, input current correction value, and time of the induction heating cooker according to the first embodiment.
  • FIG. 7 shows the elapsed time and the change of each characteristic when water is poured into the article to be heated 5 and the boiling of water are shown
  • FIG. 7 (a) shows the drive frequency
  • FIG. 7 (b) shows the temperature ( Water temperature)
  • FIG. 7C shows the input current
  • FIG. 7D shows the input current correction value.
  • the temperature (water temperature) of the article 5 to be heated gradually rises until it boils (FIG. 7 ( b)).
  • the input current gradually decreases as the temperature of the article to be heated 5 rises.
  • the primary voltage V1 increases, the input current also increases, and when the primary current V1 decreases, the input current also decreases.
  • the input current correction value obtained by dividing the input current by the primary DC voltage is not affected by the change in the primary voltage, and depends on the temperature change of the article 5 to be heated. Change.
  • the control unit 45 obtains a change amount (time change) per predetermined time of the input current correction value in a state where the drive frequency of the inverter circuit 23 is fixed.
  • the amount of change in the temperature becomes equal to or less than a predetermined value, it is determined that the kettle is completed.
  • the predetermined value information may be set in the control unit 45 in advance, or may be input from the operation unit 40 or the like.
  • reports that the kettle was completed using the alerting
  • the notification means 42 is not particularly limited, for example, displaying the completion of boiling on the display unit 41 or notifying the user by voice using a speaker (not shown).
  • the amount of change per predetermined time of the input current correction value (ratio of the input current to the primary voltage value) is set in a state where the drive frequency of the inverter circuit 23 is fixed in the water heating mode in which the water boiling operation is set. Then, when the amount of change per predetermined time becomes equal to or less than the predetermined value, the notification means 42 notifies the fact that the boiling has been completed. For this reason, even if the AC voltage value of the AC power supply 21 changes, the completion of boiling of water can be detected with high accuracy, and a highly reliable induction heating cooker can be obtained. In addition, a user-friendly induction heating cooker can be obtained.
  • the control unit 45 obtains a change amount (time change) per predetermined time of the DC voltage (primary voltage) detected by the primary voltage detection means 35, and the change amount per predetermined time becomes a predetermined upper limit value or more. That is, when a change (increase or decrease) exceeds a predetermined upper limit value, the hot water heating mode is canceled and the drive of the inverter circuit 23 is controlled to reduce the high frequency power (thermal power) supplied to the heating coil 11a, or The supply of high-frequency power to the heating coil 11a is stopped.
  • the information on the predetermined upper limit value may be set in the control unit 45 in advance or may be input from the operation unit 40 or the like.
  • reports that the protection control operation
  • the notification means 42 is not particularly limited, for example, displaying on the display unit 41 or notifying the user by voice using a speaker (not shown).
  • the high-frequency power (thermal power) supplied to the heating coil 11a is reduced. Therefore, an induction heating cooker with high safety (reliability) can be obtained.
  • the controller 45 determines that the kettle has been completed, the driving frequency is released, the driving frequency of the inverter circuit 23 is increased, the input current is decreased, and the high-frequency power supplied to the heating coil 11a. You may make it reduce (thermal power). In the case of boiling water (boiling water), the water temperature does not become 100 ° C. or higher even if the heating power is increased more than necessary, so that the water temperature can be maintained even if the driving frequency is increased and the heating power is decreased. Thus, when the amount of change per predetermined time of the input current correction value is equal to or less than the predetermined value, the drive of the inverter circuit 23 is controlled to reduce the high frequency power supplied to the heating coil 11a. Energy can be saved by reducing power.
  • FIG. 8 is a diagram illustrating another drive circuit of the induction heating cooker according to the first embodiment.
  • the drive circuit 50 shown in FIG. 8 is obtained by adding a resonance capacitor 24b to the configuration shown in FIG.
  • Other configurations are the same as those in FIG. 2, and the same parts are denoted by the same reference numerals.
  • the resonance circuit is configured by the heating coil 11a and the resonance capacitor, the capacity of the resonance capacitor is determined by the maximum heating power (maximum input power) required for the induction heating cooker.
  • the drive circuit 50 shown in FIG. 8 by connecting the resonant capacitors 24a and 24b in parallel, the respective capacities can be halved, and an inexpensive control circuit can be obtained even when two resonant capacitors are used. .
  • the coil current detection means 25b can be used, a small and inexpensive control circuit can be obtained, and an inexpensive induction heating cooker can be obtained.
  • the method for controlling the thermal power by changing the drive frequency is described.
  • the method for controlling the thermal power by changing the on-duty (on / off ratio) of the switching element of the inverter circuit 23 is used. Also good.
  • the input current correction value is calculated by dividing the input current detected by the input current detection means 25a by the DC voltage (primary voltage) detected by the primary voltage detection means 35.
  • the present invention is not limited to this, and the system is not particularly limited as long as the system corrects the input current with the primary voltage (for example, a system using a coefficient or a calculation formula).
  • the change amount of the input current detected by the input current detection unit 25a has been described.
  • the change amount of the coil current detected by the coil current detection unit 25b instead of the input current. May be detected, or the amount of change in both the input current and the coil current may be detected.
  • the half-bridge type inverter circuit 23 has been described. However, a configuration using a full-bridge type or single-stone voltage resonance type inverter may be used.
  • IH cooking heater was demonstrated to the example as an example of the induction heating cooking appliance of this invention, this invention is not limited to this.
  • the present invention can be applied to any induction heating cooker that employs an induction heating method, such as a rice cooker that performs cooking by induction heating.
  • SYMBOLS 1 1st heating port, 2nd heating port, 3rd heating port, 4 top plate, 5 to-be-heated object, 11 1st heating means, 11a heating coil, 12 2nd heating means, 13th Three heating means, 21 AC power supply, 22 DC power supply circuit, 22a diode bridge, 22b reactor, 22c smoothing capacitor, 23 inverter circuit, 23a, 23b IGBT, 23c, 23d diode, 24a, 24b resonance capacitor, 25a input current detection means 25b, coil current detection means, 30 temperature detection means, 35 primary voltage detection means, 35a, 35b resistance, 40a-40c operation section, 41a-41c display section, 42 notification means, 45 control section, 50 drive circuit, 100 induction heating Cooking device.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

L'invention concerne une cuisinière à induction dans laquelle un circuit onduleur (23) est piloté en fonction des résultats d'une détermination par un moyen de détermination de charge, et dans un état dans lequel la fréquence de pilotage du circuit onduleur (23) est fixe, un niveau de modification par durée prédéterminée d'une valeur est obtenu, ladite valeur étant obtenue en se basant sur une valeur de tension primaire correspondant à une tension alternative provenant d'une alimentation électrique en courant alternatif (21) ou d'une tension continue d'une alimentation électrique en courant continu (22), et en se basant sur une valeur de courant d'un courant d'entrée du circuit onduleur (23) et/ou d'un courant de bobine qui circule dans une bobine de chauffage (11a). Une variation de température d'un objet à chauffer (5) est détectée en se basant sur le niveau de modification par durée prédéterminée.
PCT/JP2012/077941 2012-10-30 2012-10-30 Cuisinière à induction Ceased WO2014068645A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2012/077941 WO2014068645A1 (fr) 2012-10-30 2012-10-30 Cuisinière à induction
JP2014544330A JP5921707B2 (ja) 2012-10-30 2013-03-13 誘導加熱調理器
PCT/JP2013/056914 WO2014069009A1 (fr) 2012-10-30 2013-03-13 Cuisinière à induction

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Application Number Priority Date Filing Date Title
PCT/JP2012/077941 WO2014068645A1 (fr) 2012-10-30 2012-10-30 Cuisinière à induction

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KR102849408B1 (ko) * 2020-02-27 2025-08-21 엘지전자 주식회사 유도 가열 구현 가능한 무선 전력 전송 장치 및 그의 제어 방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0562773A (ja) * 1991-09-03 1993-03-12 Zojirushi Corp 誘導加熱調理器の温度検出装置
JP2003151753A (ja) * 2001-11-13 2003-05-23 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2006114371A (ja) * 2004-10-15 2006-04-27 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2006114311A (ja) * 2004-10-14 2006-04-27 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2007287702A (ja) * 2007-07-11 2007-11-01 Matsushita Electric Ind Co Ltd 誘導加熱調理器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0562773A (ja) * 1991-09-03 1993-03-12 Zojirushi Corp 誘導加熱調理器の温度検出装置
JP2003151753A (ja) * 2001-11-13 2003-05-23 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2006114311A (ja) * 2004-10-14 2006-04-27 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2006114371A (ja) * 2004-10-15 2006-04-27 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2007287702A (ja) * 2007-07-11 2007-11-01 Matsushita Electric Ind Co Ltd 誘導加熱調理器

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