WO2013136577A1 - Cuisinière à induction - Google Patents

Cuisinière à induction Download PDF

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Publication number
WO2013136577A1
WO2013136577A1 PCT/JP2012/077943 JP2012077943W WO2013136577A1 WO 2013136577 A1 WO2013136577 A1 WO 2013136577A1 JP 2012077943 W JP2012077943 W JP 2012077943W WO 2013136577 A1 WO2013136577 A1 WO 2013136577A1
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WO
WIPO (PCT)
Prior art keywords
frequency
drive
drive circuit
driving
circuit
Prior art date
Application number
PCT/JP2012/077943
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English (en)
Japanese (ja)
Inventor
吉野　勇人
浩志郎 ▲高▼野
彰 森井
西　健一郎
田村　憲一
Original Assignee
三菱電機株式会社
三菱電機ホーム機器株式会社
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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Application filed by 三菱電機株式会社, 三菱電機ホーム機器株式会社 filed Critical 三菱電機株式会社
Priority to ES13760292.6T priority Critical patent/ES2573657T3/es
Priority to PCT/JP2013/056917 priority patent/WO2013137287A1/fr
Priority to JP2014504949A priority patent/JP6238888B2/ja
Priority to EP13760292.6A priority patent/EP2827679B1/fr
Priority to CN201380014442.5A priority patent/CN104170524B/zh
Publication of WO2013136577A1 publication Critical patent/WO2013136577A1/fr
Priority to JP2016118937A priority patent/JP6141492B2/ja

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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
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like

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, it is determined that the temperature change of the object to be heated is 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 drive circuit that supplies high-frequency power to the heating coil, load determination means that performs load determination processing of the heating coil, and the drive A control unit that controls driving of the circuit and controls high-frequency power supplied to the heating coil, wherein the control unit drives the driving circuit according to a determination result of the load determination unit, and the driving In a state where the drive frequency of the circuit is fixed, the amount of change per predetermined time of at least one of the input current to the drive circuit and the coil current flowing through the heating coil is obtained, and based on the amount of change per predetermined time, The temperature change of the to-be-heated object is detected.
  • 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 the figure which expanded the part shown with the broken line of FIG. 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 another drive circuit of the induction heating cooking appliance which concerns on Embodiment 1.
  • FIG. It is a figure which shows the relationship between the drive frequency of the induction heating cooking appliance which concerns on Embodiment 2, temperature, input current, and time.
  • 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 operation of the whole induction heating cooker.
  • 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 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, respectively, as flywheel diodes. 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 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. Further, when the change amount per predetermined time obtained in a state where the drive frequency of the inverter circuit 23 is fixed is equal to or less than the predetermined value, the control unit 45 releases the fixation of the drive frequency, and the drive frequency of the inverter circuit 23 To vary the high-frequency power supplied to the heating coil 11a. Details of such an operation will be described with reference to FIGS.
  • FIG. 7 is an enlarged view of a portion indicated by a broken line in FIG.
  • FIG. 8 is a diagram showing the relationship between the drive frequency, temperature, input current, and time of the induction heating cooker according to Embodiment 1.
  • FIG. 8A shows the driving frequency
  • FIG. Water temperature shows the input current.
  • the control unit 45 releases the fixed driving frequency, increases the driving frequency of the inverter circuit 23 to decrease the input current, and decreases the high-frequency power (thermal power) supplied to the heating coil 11a. At this time, even if the driving frequency is increased to lower the thermal power, the temperature hardly decreases, so that the operating point moves (changes) from point B to point C as shown in FIG. And the control part 45 fixes the drive frequency of the inverter circuit 23 again, and continues heating by the reduced thermal power.
  • boiling water boiling water
  • the water temperature does not become 100 ° C. or higher, so that the water temperature can be maintained even if the driving frequency is increased to lower the heating power.
  • the drive of the inverter circuit 23 is controlled to reduce the high frequency power supplied to the heating coil 11a. Energy saving can be achieved by suppressing.
  • control unit 45 raises the drive frequency to the inverter circuit 23 and notifies the user of the completion of boiling by using the notification means 42. Note that the user may be notified before or after raising the drive frequency.
  • the user may throw the ingredients into the object to be heated 5 (pan) by notifying the completion of boiling.
  • a case will be described as an example where ingredients are put into the article to be heated 5 at time t2.
  • the temperature of the article to be heated 5 decreases as shown in FIG. 8 (b). This temperature decrease is more markedly reduced when the added ingredients are at a low temperature, such as frozen food. As the temperature drops, the input current increases rapidly as shown in FIG. At this time, as shown in FIG. 7, the operating point moves (changes) from point C to point D.
  • the control unit 45 When the amount of change per predetermined time obtained when the drive frequency of the inverter circuit 23 is fixed is equal to or greater than the second predetermined value, the control unit 45 performs an operation of adding food, adding water, or the like. Thus, it is determined that the temperature has decreased (time t3).
  • the information on the second predetermined value may be set in the control unit 45 in advance, or may be input from the operation unit 40 or the like.
  • the control unit 45 releases the fixed driving frequency, decreases the driving frequency of the inverter circuit 23, increases the input current, and increases the high-frequency power (thermal power) supplied to the heating coil 11a.
  • the operating point moves (changes) from point D to point E as shown in FIG.
  • the control part 45 fixes the drive frequency of the inverter circuit 23 again, and continues heating by the increased thermal power.
  • the drive frequency is fixed and the inverter circuit 23 is driven.
  • the drive frequency is fixed and the inverter circuit 23 is driven.
  • 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 temperature detection means 30 such as a thermistor or an infrared sensor for detecting the temperature of the object to be heated 5 is used to detect the amount of change in the input current and the temperature detection means 30. In combination with temperature detection by, we realize a reliable induction heating cooker that suppresses overheating of oil.
  • the control unit 45 When the deep-fried food mode is selected as the cooking menu (operation mode) by the operation unit 40, the control unit 45 performs a load determination process in the same manner as described above, determines an appropriate driving frequency for the material of the object to be heated 5, An induction heating operation is performed with the determined drive frequency fixed. Further, by outputting the value of the input current during heating and the temperature detected by the temperature detection means 30 to the control unit 45, the control unit 45 can store the relationship between the temperature and the input current.
  • the control unit 45 releases the fixing of the driving frequency and gradually increases the driving frequency so as to maintain the temperature. Increase to lower firepower. At this time, that is, when the drive frequency is gradually increased, the control unit 45 stores the value of the input current detected by the input current detection means 25a and the temperature detected by the temperature detection means 30 simultaneously with the changed drive frequency. Let The control unit 45 notifies the user of the completion of the preheating of the deep-fried food cooking by the notification means 42, fixes the drive frequency of the inverter circuit 23 again, and continues heating with the reduced heating power. The notification to the user may be performed before or after raising the drive frequency.
  • the control unit 45 controls the drive of the inverter circuit 23 when the amount of change per predetermined time of the input current or the coil current obtained with the drive frequency of the inverter circuit 23 fixed is equal to or greater than a third predetermined value. Then, the high frequency power supplied to the heating coil 11a is increased.
  • the information of the third predetermined value may be set in the control unit 45 in advance, or may be input from the operation unit 40 or the like.
  • the high frequency power supplied to the heating coil 11a is reduced, and the input current obtained in a state where the drive frequency of the inverter circuit 23 is fixed is obtained.
  • the drive of the inverter circuit 23 is controlled to increase the high frequency power supplied to the heating coil 11a. For this reason, since the temperature fall of oil can be suppressed and the temperature suitable for deep-fried food cooking can be maintained, the easy-to-use induction heating cooker which shortened the time of deep-fried food cooking can be obtained.
  • the temperature detecting means 30 such as a thermistor or an infrared sensor
  • the input current in the drive frequency fixed control changes abruptly, it is possible to detect the temperature drop of the oil by detecting the change amount of the input current.
  • FIG. 9 is a diagram showing another drive circuit of the induction heating cooker according to the first embodiment.
  • the drive circuit 50 shown in FIG. 9 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. 9 by connecting the resonance capacitors 24a and 24b in parallel, the respective capacities can be halved, and an inexpensive control circuit can be obtained even when two resonance 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.
  • FIG. 10 is a diagram showing the relationship between the drive frequency, temperature, input current and time of the induction heating cooker according to the second embodiment.
  • FIG. 10 shows the elapsed time and the change of each characteristic when water is poured into the article to be heated 5 and the water is heated are shown.
  • FIG. 10 (a) shows the driving frequency
  • FIG. 10 (b) shows the temperature
  • FIG. 10C shows the input current.
  • Water heating mode 3 Another control operation when the water heating mode is selected by the operation unit 40 will be described.
  • the controller 45 performs a load determination process, determines a drive frequency according to the determined pan material, drives the inverter circuit 23 with the determined drive frequency fixed. To perform induction heating. And the control part 45 judges completion of boiling by the time change of input current. Further, when the change amount per predetermined time obtained in a state where the drive frequency of the inverter circuit 23 is fixed is equal to or less than the predetermined value, the control unit 45 releases the fixation of the drive frequency, and the drive frequency of the inverter circuit 23 To vary the high-frequency power supplied to the heating coil 11a. Details of such an operation will be described with reference to FIG.
  • control unit 45 releases the fixed driving frequency and increases the driving frequency of the inverter circuit 23 to decrease the input current, thereby reducing the high-frequency power (thermal power) supplied to the heating coil 11a. At this time, even if the driving frequency is increased to lower the thermal power, the temperature hardly decreases. And the control part 45 fixes the drive frequency of the inverter circuit 23 again, and continues heating by the reduced thermal power.
  • boiling water boiling water
  • the water temperature does not become 100 ° C. or higher, so that the water temperature can be maintained even if the driving frequency is increased to lower the heating power.
  • the drive of the inverter circuit 23 is controlled to reduce the high frequency power supplied to the heating coil 11a. Energy saving can be achieved by suppressing.
  • control unit 45 raises the drive frequency to the inverter circuit 23 and notifies the user of the completion of boiling by using the notification means 42. Note that the user may be notified before or after raising the drive frequency.
  • the temperature of the object to be heated 5 (the temperature at the bottom of the pan) changes at a temperature almost equal to or slightly higher than the water temperature. That is, the temperature of the article 5 to be heated is constant at about 100 ° C. during boiling of water.
  • the change amount per predetermined time (decrease amount) obtained in a state where the drive frequency of the inverter circuit 23 is fixed becomes equal to or greater than a fourth predetermined value (when decreased below the fourth predetermined value), It is determined that water has evaporated (time t3).
  • the information of the fourth predetermined value may be set in advance in the control unit 45, or may be input from the operation unit 40 or the like.
  • the control part 45 stops supply of the high frequency electric power (thermal power) to the heating coil 11a. At this time, the control unit 45 notifies the user of water evaporation by the notification means 42.
  • the temperature detection means 30 Even when a contact-type thermistor or a non-contact-type infrared sensor is applied as the temperature detection means 30, it is possible to detect the evaporation of water, but It is difficult to detect an abrupt temperature change instantaneously, and there is a risk (problem) that the temperature of the article 5 to be heated rises rapidly.
  • 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.
  • Embodiments 1 and 2 can be combined.
  • an operation mode in which the operation in the hot water mode 2 and the operation in the hot water mode 3 can be combined.
  • the example in which the amount of change in the input current detected by the input current detection unit 25a is detected has been described.
  • the coil current detected by the coil current detection unit 25b The amount of change 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 a single-tone voltage resonance type inverter may be used.
  • the IH cooking heater has been described as an example of the induction heating cooker of the present invention, but the present 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, 40a to 40c operation section, 41a to 41c display section, 42 notification means, 45 control section, 50 drive circuit, 100 induction heating cooker.

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

Abstract

Dans la présente invention, un circuit onduleur (23) est commandé en fonction des résultats de détermination d'un moyen de détermination de charge, et dans un état dans lequel une fréquence de commande pour le circuit onduleur (23) est constante, des variations par temps prescrit du courant d'entrée ou du courant de bobine sont trouvées. Sur la base des variations par temps prescrit, des changements de température d'un objet (5) à chauffer sont détectés.
PCT/JP2012/077943 2012-03-14 2012-10-30 Cuisinière à induction WO2013136577A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
ES13760292.6T ES2573657T3 (es) 2012-03-14 2013-03-13 Cocina de calentamiento por inducción
PCT/JP2013/056917 WO2013137287A1 (fr) 2012-03-14 2013-03-13 Cuisinière à induction
JP2014504949A JP6238888B2 (ja) 2012-03-14 2013-03-13 誘導加熱調理器
EP13760292.6A EP2827679B1 (fr) 2012-03-14 2013-03-13 Cuisinière à induction
CN201380014442.5A CN104170524B (zh) 2012-03-14 2013-03-13 感应加热烹调器
JP2016118937A JP6141492B2 (ja) 2012-03-14 2016-06-15 誘導加熱調理器

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Application Number Priority Date Filing Date Title
JP2012057049 2012-03-14
JP2012-057049 2012-03-14

Publications (1)

Publication Number Publication Date
WO2013136577A1 true WO2013136577A1 (fr) 2013-09-19

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PCT/JP2012/077943 WO2013136577A1 (fr) 2012-03-14 2012-10-30 Cuisinière à induction
PCT/JP2013/056917 WO2013137287A1 (fr) 2012-03-14 2013-03-13 Cuisinière à induction

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PCT/JP2013/056917 WO2013137287A1 (fr) 2012-03-14 2013-03-13 Cuisinière à induction

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EP (1) EP2827679B1 (fr)
JP (2) JP6238888B2 (fr)
CN (1) CN104170524B (fr)
ES (1) ES2573657T3 (fr)
WO (2) WO2013136577A1 (fr)

Cited By (4)

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WO2015059802A1 (fr) * 2013-10-24 2015-04-30 三菱電機株式会社 Cuisinière à chauffage par induction
JP6038344B2 (ja) * 2013-10-24 2016-12-07 三菱電機株式会社 誘導加熱調理器
JP6038343B2 (ja) * 2013-10-24 2016-12-07 三菱電機株式会社 誘導加熱調理器
WO2015063942A1 (fr) * 2013-11-01 2015-05-07 三菱電機株式会社 Plaque de cuisson à induction
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CN111385922A (zh) * 2018-12-29 2020-07-07 佛山市顺德区美的电热电器制造有限公司 电磁加热器具的控制方法、装置及电磁加热器具
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