WO2012160750A1 - Dispositif de cuisson à chauffage par induction et programme pour celui-ci - Google Patents

Dispositif de cuisson à chauffage par induction et programme pour celui-ci Download PDF

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Publication number
WO2012160750A1
WO2012160750A1 PCT/JP2012/002626 JP2012002626W WO2012160750A1 WO 2012160750 A1 WO2012160750 A1 WO 2012160750A1 JP 2012002626 W JP2012002626 W JP 2012002626W WO 2012160750 A1 WO2012160750 A1 WO 2012160750A1
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Prior art keywords
heating
sub
heating coil
main
power
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PCT/JP2012/002626
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English (en)
Japanese (ja)
Inventor
広美 蜷川
幸男 川田
和裕 亀岡
Original Assignee
三菱電機株式会社
三菱電機ホーム機器株式会社
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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 JP2013516178A priority Critical patent/JP5642271B2/ja
Publication of WO2012160750A1 publication Critical patent/WO2012160750A1/fr

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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

  • the present invention relates to an induction heating cooker for heating an object to be heated such as a metal pan containing the object to be cooked from below and a program for executing the control thereof.
  • a cooking device that heats an object to be heated, such as a metal pan, by a heating coil is recognized by consumers as having excellent features such as safety, cleanliness, and high efficiency.
  • Such induction heating cookers can be either a stationary type that is placed on the top surface of a sink or the like depending on the installation form, and a built-in type that is set in an installation space in kitchen furniture such as a sink. In any type, almost the entire upper surface is covered with a top plate (also called a top plate) formed of a heat-resistant glass plate or the like, and below that is one or more induction heatings.
  • the source is arranged.
  • the induction heating source As the induction heating source, a plurality of heating coils having different diameters arranged concentrically and substantially on the same plane, and a high-frequency generating power circuit (also referred to as an inverter circuit) for supplying high-frequency power to each of the heating coils are used.
  • a high-frequency generating power circuit also referred to as an inverter circuit
  • an inverter circuit for supplying high-frequency power to each of the heating coils.
  • a circular heating coil is placed in the center, a plurality of side heating coils are arranged so as to be adjacent to both sides of the center heating coil, and the central heating coil and the side heating coil are separately provided.
  • induction induction generated between the side heating coil and the central heating coil is considered by considering the direction of the high frequency current flowing through the plurality of side heating coils and the central heating coil.
  • There is one that can be used for applications such as canceling electric power and simultaneously heating a wide planar area see, for example, Patent Document 2).
  • the first heating coil is disposed in the vicinity of the first heating coil, the minimum outer diameter of the heating coil is shorter than the minimum outer diameter of the first heating coil, and the first Controlling the outputs of a plurality of heating coil groups, a first inverter circuit that drives the first heating coil, and a second inverter circuit that drives the plurality of heating coil groups, each having a different center from that of the heating coil
  • An induction heating cooker provided with a control unit is also proposed (see, for example, Patent Document 3).
  • a plurality of annular heating coils disposed in substantially the same plane below the top plate and having different circular centers, and an inverter circuit for supplying induction heating power to the plurality of heating coils And a control unit for controlling the output of the inverter circuit, and an operation unit for instructing the control unit to start / stop heating, set a heating power, etc., and the control unit is configured according to an instruction from the operation unit.
  • Japanese Patent No. 2978069 (first page, second page, FIG. 1) Japanese Patent No. 3725249 (first page, second page, FIG. 3) JP 2010-73384 A (page 2, page 7, FIG. 3) JP 2010-165656 A (first page, second page, FIGS. 1 and 2) JP 2010-146882 A (first page, second page, FIG. 1 and FIG. 2)
  • the hot water is rapidly boiled, the boiled food is kept at a high temperature or a predetermined temperature state (also referred to as heat retention), or the frying pan is rapidly heated to a predetermined temperature.
  • a predetermined temperature state also referred to as heat retention
  • the frying pan is rapidly heated to a predetermined temperature.
  • cooking menus that the user desires, such as making the overall temperature as uniform as possible, raising the temperature of the outer peripheral edge of the pan, the so-called pan skin temperature, to the desired level and then adding cooking ingredients.
  • pan skin temperature there is a problem that the user cannot easily or automatically select a driving pattern of the heating coil suitable for the cooking menu.
  • the present invention has been made in view of the above problems, and an induction heating cooker adopting a control that can promote the occurrence of convection in a liquid such as water or boiled juice in a heated object, and a control that can suppress burning
  • the main purpose is to obtain the program.
  • An induction heating cooker is an annular main heating coil, a flat-shaped first heating coil that is disposed in the vicinity of a side portion of the main heating coil and has a lateral width smaller than the radius of the main heating coil.
  • induction heating power is supplied from the inverter circuit to the main heating coil, and then the dielectric heating to the main heating coil, the first sub-heating coil, and the second sub-heating coil
  • a period 2 in which the power supply is stopped is provided, and then a period 3 in which no induction heating power is supplied to the main heating coil and the second sub heating coil is provided, and the induction heating power is supplied to the first sub heating coil during this period.
  • a period 4 is provided in which the supply of dielectric heating power to the main heating coil, the first sub-heating coil, and the second sub-heating coil is stopped, and then induction heating to the main heating coil and the first sub-heating coil is performed.
  • a period 5 in which the power is stopped is provided, and during this period, the dielectric heating power is supplied to the second sub-heating coil.
  • the main heating coil, the first sub-heating coil, and the second sub-heating are supplied.
  • the supply of the dielectric heating power to the coil is stopped, and the control unit repeats the energization control operation of the periods 1 to 6 for the main heating coil and the first and second sub-heating coils a plurality of times. Thereby, burning can be prevented.
  • An induction heating cooker is an N-shaped main heating coil and N pieces of a flat shape that are disposed close to the side of the main heating coil and have a width that is smaller than the radius of the main heating coil.
  • N is a number of 4 or more) sub-heating coils, an inverter circuit that supplies induction heating power to the main heating coil and all the sub-heating coils, a control unit that controls the output of the inverter circuit, and the control An operation unit for instructing at least one of heating operation or conditions to the unit, and the control unit provides a period 1 during which no induction heating power is supplied to the first to Nth sub-heating coils.
  • a period 2 is provided in which induction heating power is supplied from the inverter circuit to the main heating coil during the period, and thereafter, the dielectric heating power supply to the main heating coil and the first to Nth sub-heating coils is stopped.
  • a period 3 during which no induction heating power is supplied to the main heating coil and the second to Nth subheating coils is provided, and during this period, the induction heating power is supplied to the first subheating coil.
  • a period 4 in which the supply of dielectric heating power to the 1st to Nth sub-heating coils is stopped is provided, and thereafter the period during which no dielectric heating power is supplied to the main heating coil, the first subheating coil, and the 3rd to Nth subheating coils.
  • a dielectric heating power is supplied to the second sub-heating coil, and thereafter, a period 6 in which the dielectric heating power supply to the main heating coil and the first to N-th sub-heating coils is stopped is provided, Thereafter, a period 7 during which no induction heating power is supplied to the main heating coil, the first to second subheating coils, and the fourth to Nth subheating coils is provided, and the induction heating power is supplied to the third subheating coil during this period.
  • a period 8 is provided in which the dielectric heating power supply to the heating coil and the first to Nth sub-heating coils is stopped, and thereafter the dielectric heating power supply to the main heating coil and the first to third sub-heating coils is stopped.
  • 9 is provided, and during this period, a dielectric heating power is supplied to the fourth sub-heating coil, and thereafter, a period 10 during which the dielectric heating power is not supplied to the main heating coil and all the sub-heating coils is provided.
  • the energization control operation for the periods 1 to 10 for the main heating coil and the first to Nth sub-heating coils is repeated a plurality of times. Thereby, burning can be prevented.
  • An induction heating cooker is a flat main heating coil and a flat shape having a lateral width smaller than the radius of the main heating coil, each being arranged close to the side of the main heating coil.
  • N sub-heating coils (N is a number of 4 or more), an inverter circuit that supplies induction heating power to the main heating coil and all the sub-heating coils, and a control unit that controls the output of the inverter circuit,
  • An operation unit for instructing the control unit to perform at least one of heating operation or conditions, and the sub-heating coil includes a first set of sub-heating coils adjacent to each other that are more than half and less than the total number, and the rest
  • the control unit provides a period 1 during which no dielectric heating power is supplied to the first set and the second set of sub-heating coils.
  • a period 2 in which the supply of dielectric heating power to the main heating coil and the first set and the second set of sub heating coils is stopped is provided, and then the main heating coil and the second set of sub heating coils are provided.
  • a period 3 in which the supply of the dielectric heating power to is stopped is provided, during which the dielectric heating power is supplied from the inverter circuit to the first set of sub-heating coils, and then the main heating coil and the first heating coil are supplied.
  • a period 4 is provided in which the dielectric heating power supply to the set and the second set of sub-heating coils is stopped, and thereafter the period 5 is set to stop the supply of the dielectric heating power to the main heating coil and the first set of sub-heating coils.
  • dielectric heating power is supplied from the inverter circuit to the second set of sub-heating coils, and then to the main heating coil, the first set, and the second set of sub-heating coils.
  • Dielectric heating electric Period 6 stopping the supply provided, the control unit repeats the main heating coil and the first, a plurality of times the energization control operation of the period 1-6 for the second set of sub-heating coils. Thereby, burning can be prevented.
  • An induction heating cooker is an N-shaped main heating coil and N pieces of a flat shape that are disposed close to the side of the main heating coil and have a width smaller than the radius of the main heating coil.
  • N is a number of 4 or more
  • sub-heating coils an inverter circuit that supplies induction heating power to the main heating coil and all the sub-heating coils
  • control unit that controls the output of the inverter circuit
  • a first set of sub-heating coils that are located on a diagonal line that is greater than half and less than the total number.
  • the control unit is divided into a second group of remaining sub-heating coils, and the control unit provides a period 1 during which no dielectric heating power is supplied to the first group and the second group of sub-heating coils.
  • the main heating coil A period 2 is provided in which induction heating power is supplied from the inverter circuit, and thereafter the dielectric heating power supply to the main heating coil and the first and second sets of sub-heating coils is stopped.
  • a period 5 in which the supply of the dielectric heating power to is stopped is provided, during which the dielectric heating power is supplied from the inverter circuit to the second set of sub-heating coils, and then the main heating coil and the second heating coil are supplied.
  • Period 6 in which the supply of dielectric heating power to the second heating coil and the second heating coil is stopped, and the control unit sets the period 1 for the main heating coil and the first and second auxiliary heating coils. Repeat the energization control operation of ⁇ 6 several times. Thereby, burning can be prevented.
  • An induction heating cooker is a flat main heating coil and a flat shape having a lateral width smaller than the radius of the main heating coil, each being arranged close to the side of the main heating coil.
  • N sub-heating coils (N is a number of 4 or more), an inverter circuit that supplies induction heating power to the main heating coil and all the sub-heating coils, and a control unit that controls the output of the inverter circuit, An operation unit that instructs at least one of heating operation or conditions to the control unit, and the control unit provides a period 1 during which no dielectric heating power is supplied to the sub-heating coil.
  • a period 2 is provided in which induction heating power is supplied to the main heating coil from the inverter circuit, and thereafter the dielectric heating power supply to the main heating coil and the sub-heating coil is stopped.
  • a period 3 in which the supply of dielectric heating power to the heating coil is stopped is provided. During this period, dielectric heating power is supplied to the sub-heating coil from the inverter circuit, and thereafter, the dielectric heating power is supplied to the main heating coil and the sub-heating coil.
  • a period 4 in which the heating power supply is stopped is provided, and the control unit repeats the energization control operation in the periods 1 to 4 for the main heating coil and the sub-heating coil a plurality of times.
  • An induction heating cooker is an annular main heating coil and a flat-shaped first heating coil that is disposed close to the side of the main heating coil and has a width that is smaller than the radius of the main heating coil.
  • Electric power larger than the electric power supplied to each is supplied to the main heating coil, and the induction heating electric power supplied to the main heating coil is reduced in a predetermined period 2 thereafter.
  • Electric power larger than the power is supplied from the inverter circuit to the first sub-heating coil and the second sub-heating coil, respectively, and the control unit controls the energization of the periods 1-2 for the main heating coil and the sub-heating coil. Repeat the operation multiple times. Thereby, generation
  • An induction heating cooker is a flat main heating coil and a flat shape having a lateral width smaller than the radius of the main heating coil, each being arranged close to the side of the main heating coil.
  • N sub-heating coils (N is a number of 4 or more), an inverter circuit that supplies induction heating power to the main heating coil and all the sub-heating coils, and a control unit that controls the output of the inverter circuit, An operation unit that instructs at least one of heating operation or conditions to the control unit, and the control unit supplies each of the sub-heating coils from the inverter circuit in a predetermined period 1
  • the electric power larger than the electric power is supplied to the main heating coil, and the induction heating electric power supplied to the main heating coil is reduced in a predetermined period 2 thereafter, and the electric power is larger than this electric power.
  • Power is supplied to the each of the all sub-heating coil from said inverter circuit, wherein the control unit repeats a plurality of times of energization control operation the period 1-2 with respect to the main heating coil and the sub-heating coils.
  • An induction heating cooker is an annular main heating coil and a flat-shaped first heating coil disposed near the side of the main heating coil and having a lateral width smaller than the radius of the main heating coil.
  • Electric power that is larger than the sum of the supplied electric power is supplied to the main heating coil, and is supplied to the first sub-heating coil and the second sub-heating coil in a predetermined period 2 thereafter.
  • the energization control operation for the period 1 to 2 with respect to the main heating coil and the auxiliary heating coil is repeated a plurality of times. Thereby, generation
  • An induction heating cooker is an N-shaped main heating coil and N pieces of a flat shape that are disposed close to the side of the main heating coil and have a width that is smaller than the radius of the main heating coil.
  • N is a number of 4 or more) sub-heating coils, an inverter circuit that supplies induction heating power to the main heating coil and all the sub-heating coils, a control unit that controls the output of the inverter circuit, and the control An operation unit for instructing at least one of a heating operation or a condition to the unit, and the control unit supplies the first to Nth sub-heating coils from the inverter circuit in a predetermined period 1 In the predetermined period 2 thereafter, the induction heating power supplied to the first to Nth sub-heating coils is increased, and the first to second powers are supplied to the main heating coil.
  • Electric power smaller than the sum of the electric power supplied to the sub-heating coil is supplied from the inverter circuit to the main heating coil, and the control unit energizes the main heating coil and the sub-heating coil in the periods 1 to 2 Repeat the control action multiple times.
  • production of a convection can be accelerated
  • An induction heating cooker is an annular main heating coil and a flat-shaped first heating coil that is disposed in proximity to a side portion of the main heating coil and has a lateral width smaller than the radius of the main heating coil.
  • induction heating power is supplied to the first sub-heating coil and the second sub-heating coil from the inverter circuit with a second heating power, and then the inverter is connected to the main heating coil.
  • induction heating power is supplied from the circuit with a third heating power smaller than the first heating power
  • the first sub-heating coil and the second sub-heating coil are supplied from the inverter circuit to the first heating power by the second heating power.
  • the induction heating power is supplied with a small fourth heating power.
  • An induction heating cooker is an N-shaped main heating coil and a flat N shape having a lateral width smaller than the radius of the main heating coil, disposed close to the side of the main heating coil.
  • N is a number of 4 or more) sub-heating coils, an inverter circuit that supplies induction heating power to the main heating coil and all the sub-heating coils, a control unit that controls the output of the inverter circuit, and the control And an operation unit that instructs at least one of heating operation or conditions to the unit, and the control unit supplies induction heating power to the main heating coil from the inverter circuit with a first heating power.
  • induction heating power is supplied from the inverter circuit to the first to Nth sub-heating coils with a second heating power, and then the main heating coil is supplied from the inverter circuit to the first heating coil.
  • induction heating power is supplied with a third heating power smaller than the power
  • induction heating power is supplied from the inverter circuit to the first to Nth sub-heating coils with a fourth heating power smaller than the second heating power. Each one is to be supplied. Thereby, uneven heating can be made uniform.
  • An induction heating cooker is arranged at equal intervals on a concentric circle with the main heating coil so as to surround an annular main heating coil installed horizontally and the outer periphery of the main heating coil, A first sub-heating coil and a second sub-heating coil having the same shape and curved along the outer peripheral edge of the main heating coil, and the main heating coil and the first and second sub-heating coils.
  • An inverter circuit for supplying induction heating power to the control circuit, a control unit for controlling the output of the inverter circuit, and an operation unit for instructing the control unit at least one of heating operation and conditions,
  • the control unit controls the temperature of the object to be heated.
  • the control period for controlling the energization of the main heating coil and the first and second sub-heating coils is divided into four or more consecutive periods. In the first period 1, the main heating coil is driven.
  • the two sub-heating coils are not driven, the main heating coil and all the sub-heating coils are not driven in the next period 2, and one or all of the sub-heating coils are driven in the next period 3
  • the main heating coil and all the sub-heating coils are not driven, and the control unit repeats the energization control operation of the sections 1 to 4 a plurality of times, and the control unit
  • the direction of the high-frequency current flowing in the adjacent region of the main heating coil and the first sub-heating coil and the second sub-heating coil is the same or reverse depending on the cooking menu commanded from the operation unit. Is set to one of .
  • the heating unevenness can be made uniform, and when the main and sub heating coils are driven simultaneously in the preheating process, the flow of the high-frequency current in the adjacent areas is automatically switched in the opposite direction and the matching direction, and cooking is performed.
  • the menu it is possible to automatically select control with emphasis on heating rate and emphasis on uniform temperature distribution.
  • the thirteenth invention provides a program for causing a computer to execute at least one of the induction heating cookers of the first to twelfth inventions.
  • the heating operation of the object to be heated is executed by the main heating coil and at least one sub-heating coil provided on the side thereof, and the main heating coil and the sub-heating coil according to the contents of the cooking menu. Therefore, the convection during heating of the entire object to be cooked can be promoted and the temperature can be made uniform.
  • the induction heating cooker and its program that can be used for the cooking menu desired by the user, not only when heating the main heating coil alone but also when combining both the main heating coil and the sub-heating coil, and the program thereof. Can be provided.
  • top view 2 which shows a part of display part and operation part in the built-in type induction heating cooking appliance which concerns on Embodiment 1 of this invention.
  • top view 3 which shows a part of display part and operation part in the built-in type induction heating cooking appliance which concerns on Embodiment 1 of this invention.
  • flowchart 1 of the program which shows the control action of the built-in type induction heating cooking appliance which concerns on Embodiment 1 of this invention.
  • flowchart 2 of the program which shows cooking operation
  • FIG. 1 to 22 show an induction heating cooker and its program according to Embodiment 1 of the present invention, and show an example of a built-in (built-in) induction heating cooker.
  • symbol is attached
  • Heating condition of the heating means D (not shown, but refers to a heating source including a first induction heating unit 6L, a second induction heating unit 6R, etc., which will be described later) is an electrical condition for heating, It refers to physical conditions and is a general term for energization time, energization amount (thermal power), heating temperature, energization pattern (continuous energization, intermittent energization, etc.) and the like. That is, it refers to the energization condition of the heating means D.
  • Display refers to the operating conditions of cooking utensils and related information that is helpful for cooking (changes in characters, symbols, illustrations, colors, presence / absence of light emission, luminance, etc.) Including the purpose of notifying the occurrence of a condition, hereinafter referred to simply as “cooking related information”).
  • light emission and “lighting” have the same meaning, but when a light emitting element such as a light emitting diode emits light, it is often referred to as light emission, and when a lamp emits light, it is often referred to as lighting. It may be written together as described above.
  • the top plate to be described later is generally not colorless and transparent, and the material itself has a light color before painting on the surface. Therefore, the transmittance of visible light is not 100%. The light cannot be visually recognized from above the top plate 21 (described later).
  • display means of the display unit includes two types of liquid crystal (LCD), various light emitting elements (an example of a semiconductor light emitting element is an LED (Light Emitting Diode), and an LD (Laser Diode)).
  • LCD liquid crystal
  • LED Light Emitting Diode
  • LD Laser Diode
  • the display means includes a display screen such as a liquid crystal screen or an EL screen.
  • Notification refers to an operation for notifying the user of the operating conditions of the control means and cooking-related information by display or electrical sound (refers to electrically generated or synthesized sound).
  • “Informing means” includes, unless otherwise specified, notifying means using audible sounds such as a buzzer and a speaker, and notifying means using characters, symbols, illustrations, animation, or visible light.
  • FIGS. 1 and 3 are plan views schematically illustrating the entire induction heating coil of the induction heating cooker according to the present invention.
  • FIG. 2 is a plan view showing the entire induction heating cooker according to the present invention with the top plate removed.
  • the induction heating cooker according to the present invention includes a first induction heating unit 6L, a second induction heating unit 6R, and a radiant central electric heating unit 7, so-called three-mouth induction heating cooking.
  • a main body A having a horizontally long rectangle (also referred to as a horizontal rectangle) in plan view.
  • the main body portion A includes a top plate portion B in which the entire upper surface of the main body portion A is covered with a flat plate-like top plate 21 and a casing portion that constitutes the periphery (outside) other than the upper surface of the main body portion A.
  • C (not shown), heating means D for heating a pan, food, etc. with electric energy, etc., operating means E operated by a user, and control for controlling the heating means in response to a signal from the operating means Means F and a display part G for displaying operating conditions of the heating means are provided.
  • E1 is an input operation on the operating means E provided on the upper front part of the main body A by a touch key for detecting the presence or absence of input using a change in capacitance, a pressing key having a mechanical electrical contact, or the like.
  • the second selection unit, E2 is the second selection unit, and E3 is the third selection unit. The user can select various cooking menus described later by operating these selection units. Features of the functions of the selection units E1 to E3 will be described in detail later.
  • a first induction heating unit 6L is installed on the left side of the left and right center line CL1 of the main body A, and a second induction heating unit 6R is installed on the right side.
  • Reference numeral 100 denotes a display screen of the display unit G, which is a liquid crystal display screen, for example, and is arranged at the left and right central part of the main body part A so as to straddle the left and right center line CL1.
  • the main body A is formed in a substantially square shape in accordance with the size and space for covering the installation opening formed in kitchen furniture (not shown) such as a sink.
  • the upper part of the main body case 2 formed of a thin metal plate that forms the outline of the main body A is designed in a box shape with inner dimensions of a lateral width W3 of 540 mm (or 550 mm) and a depth DP2 of 402 mm.
  • the first induction heating unit 6L, the second induction heating unit 6R, and the radiant central electric heating unit 7 are installed inside the main body case.
  • the first and second induction heating sections 6L and 6R are respectively provided with induction heating coils 6LC and 6RC wound in a disk shape.
  • the rear end portion, front end portion, right end portion, and left end portion of the upper surface opening of the main body case 2 have flanges formed by integrally bending outward in an L shape.
  • the rear flange 3B, the left flange 3L, the right flange 3R, and the front flange 3F are mounted on the upper surface of the kitchen furniture, respectively, to support the load of the heating cooker.
  • a first induction heating unit that is placed on the top plate 21 is placed a heated object N such as a pan made of metal, which has magnetism (hereinafter sometimes simply referred to as a pan). 6L is configured to be induction heated by the second induction heating unit 6R.
  • the top plate 21 is rectangular as shown by a broken line in FIG. As shown in FIG. 2, the heat-resistant tempered glass plate constituting the top plate 21 has a width W2 of 728 mm and a depth dimension larger than the depth DP2.
  • W ⁇ b> 1 is a width dimension of the main body case 2 constituting the main body portion A.
  • a rectangular space below the top plate 21 having a width dimension of W3 and a depth dimension of DP2 is the component storage chamber.
  • the component storage chamber 10 includes a front wall 10F, a right side wall 10R, a left side wall 10L, and a back (rear) wall 10B.
  • the radiant type central electric heating unit 7 is disposed on the left and right center line CL1 of the main body part A and at a position closer to the rear part thereof.
  • the radiation type central electric heating source 7 uses an electric heater of a type heated by radiation (for example, a nichrome wire, a halogen heater, a radiant heater), and heats an object N to be heated such as a pan through the top plate 21 from below. It is.
  • MC is a main heating coil of the first induction heating source, and is arranged close to the lower side of the top plate 21 on which the object N to be heated is placed.
  • the outline of the heated object N such as a pan is shown by a broken circle.
  • the main heating coil is spirally wound into a bundle of about 30 thin wires of about 0.1 mm to 0.3 mm, and this bundle (hereinafter referred to as an assembly wire) is wound while one or more strands are twisted, and the center point
  • the outer shape is rounded starting from X1 and finally formed into a disk shape.
  • the diameter (maximum outer diameter dimension) of the main heating coil MC is about 180 mm to 200 mm, and the radius R1 is 90 to 100 mm.
  • a maximum power consumption (maximum thermal power) of 1.5 KW is provided (however, in the examples of FIGS. 16 and 17, the maximum rated power of the main heating coil MC is 2.0 KW, The total maximum rated power of the heating coils SC1 to SC4 is 2.0 KW).
  • SC1 to SC4 are four oval sub-heating coils, which are symmetrically arranged in the front-rear, left-right, and equidistant directions with the center point X1 of the main heating coil MC as a base point, from the center point X1.
  • the transverse dimension that is, the “thickness” (also referred to as “lateral width dimension”) WA is about 50% to 30% of the radius R1 of the main heating coil MC.
  • WA is set to 40 mm.
  • the long diameter MW is about twice as large as R1, that is, about 180 mm to 200 mm, similar to the diameter (maximum outer diameter) of the main heating coil MC.
  • the “side” of the main heating coil MC includes the upper side and the lower side (front side) as well as the right side and the left side in FIG. "" Means both the left and right sides, as well as the front and rear and diagonal directions.
  • the four sub-heating coils SC1 to SC4 are arranged on the outer peripheral surface of the main heating coil MC while maintaining a space 271 of a predetermined space (a size of several mm to 1 cm).
  • the sub-heating coils SC1 to SC4 are substantially equidistant (with the space 273 maintained).
  • These sub-heating coils SC1 to SC4 are also wound while twisting one or a plurality of assembly wires, and the assembly wires are wound in a predetermined direction so that the outer shape becomes an oval or oval shape, and then the partial wires are used to maintain the shape. It is formed by being constrained by a binding tool or being solidified with a heat resistant resin or the like.
  • the four sub-heating coils SC1 to SC4 have the same planar shape, and the vertical, horizontal, and height (thickness) dimensions are all the same. Accordingly, four sub-heating coils are manufactured and arranged at four locations.
  • these four sub-heating coils SC1 to SC4 have a tangential direction around the main coil MC having the radius R1 from the center point X1 and the longitudinal center line of each of the sub-heating coils SC1 to SC4. Match. In other words, it coincides with the major axis direction.
  • the sub-heating coils SC1 to SC4 each form a closed circuit electrically by extending each aggregated line while curving into an oval shape.
  • the vertical dimension (also referred to as height dimension and thickness) of the main heating coil MC and the vertical dimension of each of the sub-heating coils SC1 to SC4 are the same, and the facing distance between the upper surface and the lower surface of the top plate is as follows. It is installed and fixed horizontally so as to have the same dimensions.
  • DW indicates the outer diameter of a heated object N such as a metal pan that can be induction-heated by this cooker. From the diameter of the main heating coil MC and the thickness WA of the sub-heating coils SC1 to SC4 as described above, in the example of FIG. 3, the external dimension DW of the article to be heated N is about 220 mm to 240 mm.
  • FIG. 1 is a circuit block diagram of a power supply device built in the induction heating cooker 1.
  • the power supply device is a converter that converts three-phase AC power into DC current (also called a diode bridge circuit or rectifier bridge circuit), a smoothing capacitor connected to the output terminal of the converter, and a parallel connection to this smoothing capacitor.
  • Inverter circuits (power supply circuit units) SIV1 to SIV4 are provided.
  • 210L is an inverter circuit of the first induction heating unit 6L, and includes the main inverter circuit MIV and four sub inverter circuits SIV1 to SIV4.
  • 210R is an inverter circuit for the second induction heating unit 6R
  • 210M is a drive circuit for the radiation type central electric heating unit 7.
  • the heating coil 6RC of the second induction heating unit 6R includes one heating coil that is wound in an annular shape, or an inner heating coil that is wound in an annular shape, and an outer side that is in series with the heating coil. Therefore, the configuration of the inverter circuit is different from the configuration of the inverter circuit 210L described above.
  • the main inverter circuit MIV and the sub inverter circuits SIV1 to SIV4 convert the direct current from the converter into a high frequency current and supply the high frequency current to the main heating coil MC and the sub heating coils SC1 to SC4, respectively, independently of each other. Is.
  • the impedance of the induction heating coil changes depending on the presence and size (area) of the object N to be heated placed above the induction heating coil.
  • the amount of current flowing through the inverter circuits SIV1 to SIV4 also changes.
  • the power supply device of the present invention includes a current detection unit (detection circuit unit) 280 for detecting the respective current amounts flowing in the main heating coil MC and the sub-heating coils SC1 to SC4.
  • This electric current detection part is a kind of to-be-heated object mounting determination part 400 mentioned later.
  • the current detection unit 280 is used to detect the amount of current flowing through the main heating coil MC and the sub-heating coils SC1 to SC4, so that the object to be heated N is placed above each coil. Or whether the bottom area of the object N to be heated is larger than a predetermined value, and the estimation result is transmitted to the energization control unit 200, so that the placement state of the object N to be heated is detected accurately. be able to.
  • a current detection unit 280 that detects the amount of current flowing through the main inverter circuit MIV and the sub-inverter circuits SIV1 to SIV4 is used as the heated object placement determination unit 400 for detecting the placement state of the heated object N.
  • the present invention is not limited to this, and the placement state of the object to be heated N may be detected using another arbitrary sensor such as a mechanical sensor or an optical sensor.
  • the energization control unit 200 of the power supply device of the present invention is connected to a current detection unit 280 as shown in the figure, and the main inverter circuit MIV and the sub-inverter circuits SIV1 to SIV4 according to the mounting state of the object N to be heated. Is provided with a control signal. That is, the energization control unit 200 receives a signal (data indicating the placement state of the object to be heated N) related to the amount of current flowing through the main heating coil MC and the sub-heating coils SC1 to SC4 detected by the current detection unit 280.
  • the high-frequency current to the main heating coil MC and the auxiliary heating coils SC1 to SC4 are selectively controlled so as to prohibit the supply or stop the supply (if the supply has already started).
  • the energization control unit 200 supplies a control signal corresponding to the placement state of the object to be heated N to the main inverter circuit MIV and the sub-inverter circuits SIV1 to SIV4, so that the main heating coil MC and the sub-heating are supplied.
  • Power supply to the coils SC1 to SC4 can be controlled independently of each other.
  • the main heating coil MC in the center is not driven (turned off), and all the sub-heating coils SC1 to SC4 are driven (turned on), so that the pan skin such as a frying pan (the side of the pan) It is also possible to realize a cooking method that preheats only a).
  • the display screen 100 of the display unit G is commonly used for all heating sources, and is also referred to as an integrated display unit. All heating sources include first and second induction heating units 6L and 6R, a radiant central electric heating unit 7, and further an electric heating means called a grill box (grill heating chamber) or a roaster. Then, the electric heating means is also included.
  • the display screen 100 used in the integrated display means of the first embodiment is a known dot matrix type liquid crystal display screen.
  • a high-definition screen (QVGA with a resolution of 320 ⁇ 240 pixels or 640 ⁇ 480 dots, equivalent to VGA capable of displaying 16 colors) can be realized, and a large number of characters can be displayed even when characters are displayed. Can do.
  • the liquid crystal display screen is not limited to a single layer but may be a screen that displays two or more layers in order to increase display information. Further, it may be composed of STN (Super Twisted Nematic) liquid crystal using a simple matrix driving method. The user can also instruct the heating operation through this display screen, which will be described later.
  • the display area of the display screen 100 is a rectangle having a size of about 70 mm (or about 80 mm) in the vertical direction (back and forth direction) and about 100 mm (or about 120 mm) in the horizontal direction.
  • the display screen is driven by a display drive circuit.
  • the display unit driving circuit is connected to the energization control unit 200.
  • the display unit drive circuit includes a display memory, a display controller, an interface circuit, a dedicated power source, a common driver circuit, and a segment driver circuit.
  • the display unit driving circuit operates with power from a dedicated power source, and acquires image information from the display memory by the interface circuit.
  • the display memory stores image information acquired from the energization control unit 200.
  • the display controller reads the image information stored in the display memory, and drives the common driver circuit and the segment driver circuit based on the image information.
  • the common driver circuit and the segment driver circuit drive the liquid crystal by applying a voltage to mutually intersecting electrodes provided corresponding to each pixel of the display screen 100. In this way, the display drive circuit displays the image information stored in the display memory on the display screen 100 whenever necessary.
  • the display unit driving circuit is configured by a dedicated microcomputer different from the microcomputer configuring the energization control unit 200.
  • temperature sensor 31 is a temperature detection circuit provided with a temperature detection element (hereinafter referred to as “temperature sensor”) 31L (not shown).
  • the temperature sensing part of the temperature sensor is installed in the inner space of the main heating coil MC provided at the center of the heating coil 6LC of the first induction heating part 6L.
  • This temperature sensor is an infrared temperature sensor that measures the temperature by detecting the amount of infrared rays emitted from the heated object N.
  • An infrared temperature sensor 31R (not shown) is similarly installed in the heating coil 6RC of the second induction heating unit 6R.
  • the temperature sensing unit is not limited to one, and a plurality of temperature sensing units may be provided at intervals in order to capture the temperature of the bottom surface of the object N to be heated as accurately as possible.
  • it may be installed inside the main heating coil MC and in a space between the main heating coil and the sub-heating coils SC1 to SC4, or in a space inside the sub-heating coils SC1 to SC4.
  • the infrared temperature sensor is composed of a photodiode that can measure the temperature by detecting the amount of infrared radiation emitted from the heated object N such as a pan, and collects infrared radiation emitted from the heated object N.
  • the temperature can be detected from the amount of infrared rays received in real time (with almost no time difference).
  • This temperature sensor determines the temperature of the object to be heated N regardless of the temperature of the top plate 21 or the temperature of the object to be heated N and the temperature of the object to be heated N are not the same. It can be detected. That is, the infrared rays radiated from the heated object N are devised so that they are not absorbed or blocked by the top plate 21.
  • the top plate 21 is made of a material that transmits infrared rays in the wavelength range of 4.0 ⁇ m or 2.5 ⁇ m or less, while the temperature sensor detects infrared rays in the wavelength range of 4.0 ⁇ m or 2.5 ⁇ m or less. Is selected.
  • the temperature sensor may be a heat transfer type detection element, such as a thermistor type temperature sensor.
  • a heat transfer type such as a thermistor
  • it is inferior in capturing a rapid temperature change in real time as compared with the infrared temperature sensor described above, but it receives radiant heat from the top plate 21 or the heated object N.
  • the temperature of the bottom of the article N to be heated and the temperature of the top plate 21 immediately below it can be detected reliably. Further, the temperature of the top plate 21 can be detected even when there is no object to be heated N.
  • the temperature sensor and the temperature detection circuit 31 also become a part of the heated object placement determination unit 400 that is a means for detecting that the heated object N is not placed on the main / sub-heating coils. ing. That is, it can be said that the current detection unit 280 and the temperature detection circuit 31 are heated object placement determination units.
  • Reference numerals 40L and 40R denote upper surface operation units that are respectively installed left and right above the front flange 3F, as indicated by alternate long and short dash lines in FIG. These operation units receive commands from various input keys formed on the surface of the top plate 21, and the energization time of the first induction heating unit 6L, the second induction heating unit 6R, and the radiant central electric heating unit 7 You can set firepower.
  • the energization condition can be set independently of the setting by various keys for capacitive touch input on the surface of the display screen 100 described later.
  • Reference numeral 50 denotes an operation key of a main power switch (not shown) for simultaneously turning on / off all the power sources of the first induction heating unit 6L, the second induction heating unit 6R, and the radiation type central electric heating unit 7.
  • a main power switch not shown for simultaneously turning on / off all the power sources of the first induction heating unit 6L, the second induction heating unit 6R, and the radiation type central electric heating unit 7.
  • High-speed heating mode (Cooking menu giving priority to heating speed, selected with first selection unit E1)
  • the heating power applied to the object to be heated N can be set manually.
  • the total heating power of the main heating coil MC and the sub-heating coil is selected by the user from the following 16 stages within the range of 120W to 3.0KW. 120 W, 200 W, 300 W, 400 W, 500 W, 625 W, 750 W, 875 W, 1.0 KW, 1.25 KW, 1.5 KW, 1.75 KW, 2.0 KW, 2.25 KW, 2.5 KW, 3.0 KW.
  • the heating power ratio between the main heating coil MC and the auxiliary heating coils SC1 to SC4 (hereinafter referred to as “main heating power ratio”) is within the range of the predetermined heating power ratio as long as it does not exceed the total heating power selected by the user. Thus, it is automatically determined by the energization control unit 200 and cannot be arbitrarily set by the user.
  • the main / sub power ratio is from 2: 3 to (with small firepower) to 1: 1 (with small firepower).
  • the main heating coil MC and the sub-heating coils SC1 to SC4 are driven at the same time. In this case, the directions of the high-frequency currents in the adjacent areas are controlled to coincide.
  • Deep-fried food mode (automatic) (Cooking menu that requires heating speed and heat retention function, selected by third selection unit E3)
  • the heated object N (tempura pan or the like) containing the frying oil is heated to a predetermined temperature (first step), and then the energization control unit 200 generates thermal power so as to maintain the temperature of the heated object N within a predetermined range. Adjust automatically (second step).
  • 1st process It heats rapidly to predetermined temperature (for example, 180 degreeC).
  • Main heating coil thermal power is 2.5kW
  • 2nd process Deep-fried food is implemented here and tempura ingredients etc. are thrown in. Run for up to 30 minutes. In this step, (arbitrary) thermal power setting by the thermal power setting unit is prohibited. The heating operation ends automatically after 30 minutes (extension command is also possible).
  • the main / sub heating power ratio is automatically determined to be within a predetermined range in both the first step and the second step, and the user cannot arbitrarily set the heating power ratio between the main heating coil and the sub heating coil. For example, the main / sub heating power ratio is automatically changed from 2: 3 (at the time of large heating power) to 1: 1 (at the time of small heating power).
  • the main and sub heating coils are driven simultaneously in the first step, and the flow of the high frequency current of the coils in the adjacent areas is the same. This is because it quickly heats up to a predetermined temperature.
  • they are simultaneously driven and the current flows are matched. However, if the state with little change in temperature continues in the middle of fried food, the direction of the current is reversed to achieve uniform heating.
  • Preheating mode (cooking menu that prioritizes uniformity of heating. Select with second selection unit E2)
  • the first preheating process for heating the object N to be heated with a predetermined heating power is prohibited by prohibiting the setting or changing of the thermal power, and after the first preheating process is completed (using the detected temperature signal from the temperature sensor)
  • a heat retaining step for maintaining the heated object N in a predetermined temperature range is performed.
  • Preheating process Main heating coil 1.0KW (fixed)
  • Thermal insulation process Up to 5 minutes. If (arbitrary) heating power is not set during this period, the heating operation is automatically terminated after 5 minutes.
  • Main heating coil 300W to 100W (cannot be set by the user)
  • Sub-heating coil 300W to 100W (cannot be set by the user) If any thermal power setting is made during the heat insulation process, it becomes the same as high-speed heating.
  • the user can select one stage from the following 16 stages in the range where the total thermal power of the main heating coil MC and the sub-heating coil is 120 W to 3.0 KW. 120 W, 200 W, 300 W, 400 W, 500 W, 625 W, 750 W, 875 W, 1.0 KW, 1.25 KW, 1.5 KW, 1.75 KW, 2.0 KW, 2.25 KW, 2.5 KW, 3.0 KW.
  • the main / sub heating power ratio is automatically determined by the energization control unit 200 so as to be within the range of the predetermined heating power ratio, and cannot be arbitrarily set by the user.
  • the main-sub power ratio is from 1: 3 to 1 (for large thermal power) to 1: 1.
  • the main and sub-heating coils are driven simultaneously in the preheating process, but at this time, the flow of high-frequency current in the regions adjacent to each other is in the opposite direction. This is because in the adjacent region, it is important to make the heating intensity uniform by interfering with the magnetic flux generated from both heating coils. Although it is simultaneously driven in the heat insulation process, the directions of the high-frequency currents in the regions adjacent to each other are opposite. This is for uniform temperature distribution.
  • convection promotion control is started based on a user's command. This convection promotion control will be described later.
  • Water heating mode (Cooking menu giving priority to heating speed, selected with first selection unit E1)
  • the user starts heating the water in the heated object N with an arbitrary heating power, and the water boils (the temperature sensor causes the energization control unit 200 to boil from information such as the temperature of the heated object N and the temperature rise change).
  • the heating power is automatically set, and the boiling state is maintained for 2 minutes as it is.
  • Water heating process The total heating power of the main heating coil and sub-heating coil is 120W to 3.0KW (arbitrary setting from 16 levels from 1 to 9 heating power.
  • the main / sub heating power ratio is automatically determined by the energization control unit 200 so as to be within a predetermined heating power ratio within a range not exceeding the total heating power selected by the user. Can not.
  • the main / sub power ratio is from 2: 3 to (with small firepower) to 1: 1 (with small firepower).
  • Thermal insulation process Maximum 2 minutes.
  • the heating operation ends automatically after 2 minutes.
  • Main heating coil 1.0KW or less cannot be set by the user
  • Sub-heating coil 1.5KW or less cannot be set by the user) If the user sets any heating power during this period, it is the same as fast heating. You can select any one of 16 levels in the range of 120W to 3.0KW.
  • the main heating coil MC and the sub-heating coils SC1 to SC4 are driven simultaneously, and at that time, the directions of the high-frequency currents in the adjacent regions are controlled to coincide. After boiling, the direction of current is reversed.
  • Rice cooking mode (cooking menu that prioritizes the uniformity of heating. Select with the second selection unit E2) The user sets a container to be heated N containing appropriate amounts of cooked rice and water, and heats the container according to a predetermined rice cooking program (a series of programs such as a water absorption process, a heating process, a boiling process, and a steaming process). , Cook rice automatically.
  • Water absorption process and rice cooking process Main heating coil 0.6kW or less (cannot be set by the user. Automatically changes as the process progresses)
  • Sub-heating coil 0.7KW or less (cannot be set by the user. It changes automatically as the process progresses)
  • Steaming process 5 minutes main coil heating zero (thermal power 0W)
  • Thermal insulation process Up to 5 minutes.
  • Main heating coil 200W or less (cannot be set by the user)
  • Sub-heating coil 200W or less (cannot be set by the user)
  • the main and sub heating coils are driven at the same time, but are controlled so that the flow of high-frequency current in the adjacent areas is in the opposite direction. This is because it is important to make the heating intensity uniform by causing the magnetic fluxes generated from both heating coils to interfere with each other in the adjacent region.
  • the detection circuit unit (heated object placement detection unit) 280 detects that the object to be heated N is not placed on the main / sub heating coil, or the steaming process or heat retention Similarly, in any of the steps, when the object to be heated is detected by the object-to-be-heated object placement detection unit that the object to be heated N is not placed on the main and auxiliary heating coils at the same time, the main and auxiliary heating coils are heated. Stop immediately.
  • Heating process (until boiling):
  • the heating power applied to the object to be heated N can be set manually.
  • the total heating power of the main heating coil MC and the sub-heating coil is selected by the user from the following 16 stages within the range of 120W to 3.0KW. 120 W, 200 W, 300 W, 400 W, 500 W, 625 W, 750 W, 875 W, 1.0 KW, 1.25 KW, 1.5 KW, 1.75 KW, 2.0 KW, 2.25 KW, 2.5 KW, 3.0 KW.
  • the default value is 2 KW (when the user does not select thermal power, heating starts at 2 KW).
  • the main / sub heating power ratio is automatically determined by the energization control unit 200 so as to be within a predetermined heating power ratio range, and cannot be arbitrarily set by the user.
  • the main / sub power ratio is from 2: 3 to (with small firepower) to 1: 1 (with small firepower).
  • the control unit estimates that it is in a boiling state from information such as the temperature of the object to be heated N and the temperature rise degree change by the temperature sensor of the temperature detection circuit 31), the user is informed. Thereafter, the heating operation is automatically continued at the default value (600 W) so as to maintain the boiling state for 30 consecutive minutes (extension is possible), but the user may arbitrarily select the heating power after boiling.
  • the main heating coil MC and the sub-heating coils SC1 to SC4 are driven simultaneously throughout the entire heating process until boiling, and the directions of the high-frequency currents in the regions adjacent to each other are controlled to coincide. After boiling, convection promotion control is started based on the user's operation. This convection promotion control will be described later.
  • Water heater + heat retention mode (Cooking menu giving priority to heating speed and uniformity, selected with the third selection unit E3)
  • the user starts heating the water in the heated object N with an arbitrary heating power, and the water is boiled (by the temperature sensor, the control unit estimates that it is in a boiling state from information such as the temperature of the heated object N and the temperature rise degree change). ), The user is notified by the display unit G. Thereafter, the heating power is automatically set, and the boiling state is maintained for 2 minutes.
  • the main / sub heating power ratio is automatically determined by the energization control unit 200 so as to be within a predetermined heating power ratio within a range not exceeding the total heating power selected by the user. Can not.
  • the main / sub power ratio is from 2: 3 to (with small firepower) to 1: 1 (with small firepower).
  • Thermal insulation process Up to 10 minutes. The heating operation ends automatically after 10 minutes.
  • Sub-heating coil 1.5KW or less cannot be set by the user)
  • the current detection unit 280 is used to make the main heating coil MC and the sub-heating coils SC1 to SC4. By detecting the amount of current flowing through each of the coils, it is determined whether or not the object to be heated N is placed above each coil, or whether or not the bottom area of the object to be heated N is larger than a predetermined value. The result is transmitted to the energization control unit 200 which is a control unit (step MS1).
  • the energization control unit 200 displays on the operation unit E or the display unit G installed in the vicinity thereof, for example, on the liquid crystal display screen to prompt the user to select a desired cooking menu (MS2 ).
  • a heating prohibition process is performed (MS6).
  • the cooking menu displayed on the display unit G includes the above-mentioned “high-speed heating mode”, “fried food mode”, “hot water mode”, “preheating mode”, “rice cooking mode”, “boiled mode”, “hot water + warming mode” 7 ”.
  • the description of the mode is omitted, and for example, “fast heating mode” may be described as “fast heating”.
  • the control mode corresponding to these menus is automatically selected by the built-in program of the energization control unit 200, and the main heating coil MC and sub-heating are selected. Whether or not the coils SC1 to SC4 are energized, the energization amount (thermal power), the energization time, etc. are set. Depending on the cooking menu, a display prompting the user to set an arbitrary heating power, energizing time, etc. is performed on the display unit (MS5).
  • E1 includes three keys for selecting “fast heating” E1A, “boiling water E1B”, and “boil” E1C.
  • E2A and Ecooking there are two keys of “preheating” E2A and “cooking” E2B in the selection unit E2, and two keys of “hot water + heat retention” E3B and “fried food” E3A in the selection unit E3.
  • burn suppression control which is a feature of the present invention, will be described.
  • the temperature sensor detects that the temperature of the object to be heated N has increased to, for example, 98 ° C. after boiling or just before boiling, or from the elapsed time from the start of cooking
  • the energization control unit 200 determines that the boiling state is close.
  • the burn-in suppression control is started immediately after the user's arbitrary command, for example, immediately after the operation, but in the case of a specific cooking menu, Unless the user prohibits or stops heating halfway, the control may automatically shift to the burn-in suppression control.
  • This control is to heat the object N to be heated by any of the sub-heating coils SC1 to SC4 during a period when the main heating coil MC is not driven.
  • FIG. 5A shows a state where only the main heating coil MC is supplied with a high-frequency current from the main inverter circuit MIV and is heated.
  • the heat generating part of the article N to be heated is a part directly above the main heating coil MC. Therefore, the cooking object, for example, curry, stew, etc. accommodated inside the object to be heated N with the heat generating part as a reference is heated at a portion directly above the main heating coil MC.
  • the heating power of the main heating coil MC is a small heating power of about 200W.
  • FIG. 5B shows a state in which a high-frequency current is supplied from the inverter circuit SIV1 only to the sub-heating coil SC1.
  • the heat generating part of the object N to be heated is a part directly above the sub-heating coil SC1. Therefore, the food to be cooked, for example, curry, stew, etc. accommodated in the object to be heated N with the heat generating portion as a reference is heated at the portion directly above the sub-heating coil SC1.
  • the heating power of the sub-heating coil SC1 is a small heating power of about 200W.
  • FIG. 5C shows a state in which high-frequency current is supplied from the inverter circuit SIV2 only to the sub-heating coil SC2.
  • the heat generating part of the object N to be heated is a part directly above the sub-heating coil SC2. Therefore, the cooking object, for example, curry, stew, etc. accommodated inside the object to be heated N with the heat generating portion as a reference is heated at the portion directly above the sub-heating coil SC2.
  • the heating power of the sub-heating coil SC2 is a small heating power of about 200W.
  • FIG. 5D shows a state in which a high-frequency current is supplied from the inverter circuit SIV3 only to the sub-heating coil SC3.
  • the heat generating part of the object N to be heated is a part directly above the sub-heating coil SC3. Therefore, the food to be cooked, for example, curry, stew, etc. accommodated in the object to be heated N with the heat generating portion as a reference is heated at the portion directly above the sub-heating coil SC3.
  • the heating power of the sub-heating coil SC3 is a small heating power of about 200W.
  • FIG. 5E shows a state in which a high-frequency current is supplied from the inverter circuit SIV4 only to the sub-heating coil SC4.
  • the heat generating part of the object N to be heated is a part directly above the sub-heating coil SC4. Therefore, the food to be cooked, for example, curry, stew, etc. accommodated in the object to be heated N with the heat generating portion as a reference is heated at the portion directly above the sub-heating coil SC4.
  • the heating power of the sub-heating coil SC4 is a small heating power of about 200W.
  • the pan bottom temperature directly above the main heating coil MC becomes high, and it becomes easy to burn.
  • the ingredients are often stuck to the bottom of the pan, so the area where the ingredients are stuck becomes locally hot and easy to burn. End up.
  • heating is performed in the order of the main heating coil MC, the sub-heating coil SC1, the sub-heating coil SC2, the sub-heating coil SC3, and the sub-heating coil SC4. A period is provided, and the temperature of the pan bottom can be kept more uniform, and scorching can be prevented.
  • FIG. 6 is an explanatory diagram showing the timing of the current flowing through the main heating coil MC and the sub-heating coils SC1 to SC4 in the heating operation of FIG. ”, An OFF state where no voltage is applied is displayed as“ OFF ”.
  • section 1 is indicated by T1 unless otherwise specified, T1 is also referred to as “period 1”.
  • section 2 is indicated by T2, and corresponds to “period 2”.
  • sections 3 to 10 will be described with reference numerals T3 to T10.
  • the main heating coil MC is ON in the T1 section. All coils are OFF in T2.
  • sub-heating coil SC1 is ON. All coils are OFF in T4 section.
  • T5 section sub-heating coil SC2 is ON.
  • each of the sections T1 to T10 shown in FIG. 6 may be about 1 to 60 seconds. Thereafter, the current flowing through the main heating coil MC and the sub-heating coils SC1 to SC4 is turned on and off at predetermined intervals in this way.
  • the meaning of about 1 to 60 seconds means that the sections T1 to T10 are all set at 10-second intervals, and then when the sections T1 to T10 are controlled again, the same time as 10 seconds is used, and a different time is used. Means two cases.
  • the intervals T1 to T10 are all set at 15-second intervals.
  • the times of the sections T1 and T2 and the sections T3 and T4 may be different.
  • the section T1 is 10 seconds
  • T2 is 15 seconds
  • T3 is 10 seconds
  • T4 is 15 seconds.
  • the operation up to the section T10 has been described. However, when ten sections are provided, such as T11 to T20, the above-described operations from T1 to T10 are performed again. If the section T20 is provided, for example, the operations of the main heating coil MC and the first and second sub-heating coils SC1 and SC2 in T1 to T4 are performed again in the same manner as T1 to T4 in the period of T11 to T14.
  • the three heating coils repeat the same energization pattern twice. The same may be done after T21. This also applies to the energization examples shown in FIGS. 9, 11, 12, 14 and 16 to be described later, and the present invention does not necessarily complete cooking between the sections T1 to T10. Thereafter, the same operation may be repeated.
  • an OFF period is always provided after any of the main heating coil MC and the auxiliary heating coils SC1 to SC4 is turned on.
  • the cooked food can be once cooled, the penetration of the taste can be promoted, and the burning can be prevented.
  • the timing of the current flowing through the main heating coil MC and the sub heating coils SC1 to SC4 in FIG. 6 is as follows: main heating coil MC ⁇ sub heating coil SC1 ⁇ sub heating coil SC2 ⁇ sub heating coil SC3 ⁇ sub heating coil SC4.
  • the order may be changed.
  • the auxiliary heating coil may be heated in the order of the coils facing each other in the order of the main heating coil MC, the auxiliary heating coil SC1, the auxiliary heating coil SC4, the auxiliary heating coil SC2, and the auxiliary heating coil SC3.
  • the four sub-heating coils SC1 to SC4 may be heated as two sub-heating coils SCL and SCR in the order of main heating coil ⁇ sub-heating coil SCL ⁇ sub-heating coil SCR.
  • the four sub-heating coils SC1 to SC4 are divided into two groups.
  • the sub-heating coils SC1 and SC2 are adjacent to each other as in the first group and the sub-heating coils SC3 and SC4 are adjacent to each other as in the second group.
  • One set of matching sub-heating coils may be used. If there are six sub-heating coils, a third set is also possible.
  • auxiliary heating coil set (Variation 3 of the auxiliary heating coil set) As shown in FIGS. 10 and 11, two sets of four sub-heating coils SC1 to SC4, for example, one set of sub-heating coils SC1 and SC4 and one set of sub-heating coils SC3 and SC2 are arranged to face each other. One set may be used. In the case where the number of sub-heating coils is more than four, for example, six, for example, three sub-heating coils can be similarly combined into one set, and the remaining three sub-heating coils can be combined into another set.
  • convection promotion control which is a feature of the present invention.
  • convection promotion control which is a feature of the present invention.
  • the energization control unit 200 determines that the boiling state is close.
  • This control is to heat the object N to be heated by all the sub-heating coils SC1 to SC4 during a period in which the main heating coil MC is not driven.
  • FIG. 3B shows a state where only the main heating coil MC is supplied with a high-frequency current from the main inverter circuit MIV and is heated.
  • the heat generating part of the article N to be heated is a part directly above the main heating coil MC. Therefore, for example, boiled food such as boiled food housed in the object to be heated N with the heat generating portion as a reference is heated at a portion immediately above the main heating coil MC, and an ascending air current is generated. Therefore, if this state is continued, convection can be generated outward as indicated by an arrow YC in FIG. This causes the ingredients to be boiled.
  • the heating power of the main heating coil MC is set to medium to strong heating power of about 500 W to 800 W.
  • FIG. 3A shows a state in which high-frequency currents are supplied to all of the sub-heating coils SC1 to SC4 from the inverter circuits SIV1 to SC4, respectively.
  • the heat generating portion of the object to be heated N is a portion extending directly above the sub-heating coils SC1 to SC4 and between the sub-heating coils. Therefore, for example, boiled food such as boiled food accommodated in the object to be heated N with reference to the heat generating portion is heated at a portion directly above the sub-heating coils SC1 to SC4 and between the sub-heating coils, and ascending flow. Occurs.
  • the sum of the heating powers of the sub-heating coils SC1 to SC4 is medium to strong heating power of about 500W to 800W.
  • the broth is evenly applied to the cooked product, and the user can permeate the broth without stirring the cooked product.
  • the ingredients will be boiled if they are mixed in the middle, so that the boil can be suppressed.
  • FIG. 12 is an explanatory diagram showing the timing of the current flowing through the main heating coil MC and the sub-heating coils SC1 to SC4 in the heating operation.
  • the state where the high frequency current to be heated is applied is “ON” and the application is performed.
  • the OFF state that has not been set is displayed as “OFF”.
  • the main heating coil MC is ON in the T1 section. All coils are OFF in T2.
  • T3 section sub-heating coils SC1 to SC4 are ON. All coils are OFF in T4 section.
  • the main heating coil MC is ON.
  • T6 section all coils are OFF.
  • T7 section sub-heating coils SC1 to SC4 are ON.
  • T8 section all coils are OFF.
  • the sections T1 to T8 shown in FIG. 12 may be about 1 to 60 seconds.
  • the meaning of about 1 to 60 seconds means that the sections T1 to T10 are all set at 10-second intervals, and then when the sections T1 to T10 are controlled again, the same time as 10 seconds is used, and a different time is used. Means two cases. In the latter case, for example, it can be considered that the intervals T1 to T10 are all set at 15-second intervals. Note that the times of the sections T1 and T2 and the sections T3 and T4 may be different. For example, the section T1 is 10 seconds, T2 is 15 seconds, T3 is 10 seconds, and T4 is 15 seconds.
  • an OFF period is always provided after any of the main heating coil MC and the auxiliary heating coils SC1 to SC4 is turned on.
  • FIG. 13A shows a state in which a high-frequency current is simultaneously supplied from the inverter circuits MIV and SIV1 to SIV4 to the main heating coil MC and the subheating coils SC1 to SC4, and is heated.
  • size of the thermal power set to each is set as shown in FIG. 14 is demonstrated. That is, a case where the magnitude of the thermal power is set so that the main heating coil MC thermal power> the individual heating powers of the sub-heating coils SC1, SC2, SC3, and SC4 will be described.
  • the heating power set in the main heating coil MC is set larger than the heating power of each of the sub-heating coils SC1 to SC4, when two or more sub-heating coils are driven simultaneously,
  • the total sum of the heating power on the sub heating coil side is larger than the heating power of the main heating coil MC.
  • the heating part of the article N to be heated is a part directly above the main heating coil MC, a part directly above the sub-heating coils SC1 to SC4, and a part between the sub-heating coils.
  • the main heating coil MC is heated at the portion directly above and a flow rising in the YC1 direction is generated.
  • the main heating coil MC is driven (ON), and when the heating power is PW7, the heating power of the four sub-heating coils SC1 to SC4 driven in the same section T1 is PW2 smaller than PW7. .
  • the main heating coil MC continues to be driven (ON), and the thermal power PW7 becomes a smaller thermal power PW3.
  • the heating power of the four sub-heating coils SC1 to SC4 that are continuously driven in the same section T1 is changed from PW2 to a large PW6.
  • the heating power PW6 of one sub-heating coil, for example, SC1 is driven with a larger heating power than the heating power PW3 of the main heating coil MC, and simultaneously driven simultaneously with the other three sub-heating coils SC2 to SC4. Therefore, the total thermal power value (thermal power sum value) of the four sub-heating coils SC1 to SC4 is naturally several times larger than that of PW3.
  • the main heating coil MC and the four sub-heating coils SC2 to SC4 are simultaneously driven by the heating power of the section T1, and the next driving is performed in the same manner as the section T2, and thereafter the driving patterns of these sections T1 and T2 are repeated. It is.
  • FIG. 13B shows a state in which high-frequency current is simultaneously supplied from the inverter circuits MIV and SIV1 to SIV4 to the main heating coil MC and the sub-heating coils SC1 to SC4, and is heated.
  • the magnitude of the thermal power set for each is set so that the main heating coil MC ⁇ the auxiliary heating coils SC1, SC2, SC3, and SC4 as shown in FIG. That is, the magnitude of the heating power set in the main heating coil MC is set to be smaller than the heating power of each of the four sub-heating coils SC1 to SC4. Further, the heating power of the main heating coil MC is much smaller than the total heating power of the four sub-heating coils (sections T2, T4, etc. in FIG. 14).
  • the heat generating part of the object to be heated N is a part directly above the main heating coil MC, a part directly above the sub heating coils SC1 to SC4, and a part between the sub heating coils.
  • the sub-heating coils SC1 to SC4 are heated at the portion directly above, and an upward flow is generated in the YC3 direction. If the udon noodles are boiled with only the sub-heating coils SC1 to SC4, convection continues to occur in the direction of the inner YC3 and blown down.
  • thermal power to the main heating coil MC convection in the outer YC4 direction can be caused, convection in the inner YC3 direction can be slightly suppressed, and blown down can be suppressed.
  • the number of repetitions and the time interval, that is, the lengths of the sections T1 to T4 are determined by a control program built in the energization control unit 200.
  • the temperature detection circuit 31 detects a certain temperature during operation in the second convection promotion control, and when it detects electric blow-off after that, the main heating coil MC and the sub-heating coils SC1 to SC4 You may make it the operation
  • various methods have been proposed in the past for detecting blow-off, description thereof will be omitted.
  • the heating power distribution of the heating coil may be heated so that “main heating coil MC> the sum of the heating power of the sub-heating coils SC1 to SC4” and then “main heating coil MC ⁇ the sum of the heating power of the sub-heating coils SC1 to SC4”. Good.
  • thermocontrol In this control, the main heating coil MC and the sub-heating coils SC1 to SC4 are simultaneously heated, but the driving power of the main heating coil MC and the sub-heating coils SC1 to SC4 is differentiated, and the temperature detection circuit 31 detects a predetermined temperature. After that, the drive power of the main heating coil MC and the sub-heating coils SC1 to SC4 is lowered.
  • FIG. 13A shows a state in which a high-frequency current is simultaneously supplied from the inverter circuits MIV and SIV1 to SIV4 to the main heating coil MC and the sub-heating coils SC1 to SC4, and is heated.
  • the magnitude of the thermal power set for each is set such that the main heating coil MC side in the first section is set smaller than or equal to the total thermal power of the four sub-heating coils SC1 to SC4.
  • the heating coil MC and the four sub-heating coils SC1 to SC4 are driven simultaneously.
  • the heat generating part of the object N to be heated becomes a part directly above the main heating coil MC, directly above the sub heating coils SC1 to SC4, and between the sub heating coils. If the heating power on the main heating coil MC side is large, or the heating power of the main heating coil MC and the total heating power of the sub-heating coils SC1 to SC4 are equal, between the sub-heating coils SC1 to SC4 and between the sub-heating coils. There is a concern that the heating temperature is lower in the extending portion than in the portion directly above the main heating coil MC, the preheating is insufficient outside the frying pan, and the cooked food is not neatly colored.
  • control in the section after the predetermined temperature is detected by the temperature detection circuit 31, control is performed so that the sum of the heating powers of the sub-heating coils SC1 to SC4 is larger than the heating power of the main heating coil MC. .
  • a section becomes a preheating heat insulation section, and the pan can be preheated to a temperature suitable for fried egg, hamburger, dumplings, etc. without overheating and deteriorating the pan.
  • the temperature detection circuit 31 detects an abnormal temperature gradient during operation in the preheat insulation period, the heating power of the main heating coil MC and the auxiliary heating coils SC1 to SC4 is lowered or the heating power is turned off to prevent ignition. May be.
  • This control relates to the eighth and ninth inventions.
  • the main heating coil MC and the sub-heating coils SC1 to SC4 are simultaneously heated. After the temperature detection circuit 31 detects a predetermined temperature, the main heating coil MC and the sub-heating coils SC1 to SC4 are heated. A difference is made in the drive power of the coil MC and the sub-heating coils SC1 to SC4.
  • a circular main heating coil MC and four sub-heating coils SC1 to SC4 constitute an induction heating unit, and when these heating coils are driven, and as shown in FIG. 7, the main heating coil MC
  • Any of the two sub-heating coils SCL and SCR having a symmetrical shape arranged on both sides with respect to each other may be used, but the description will be made on the assumption of the latter configuration.
  • the ratio shown in FIG. 15 indicates that the main heating coil MC and the two sub-heating coils SCL and SCR respectively correspond to the total heating power input to the first induction heating unit 6L in each of the sections T1 to T7 (T8 and after are omitted). The ratio of individual thermal power.
  • the main heating coil MC is 80%, so 1600 W. Further, since the two sub-heating coils SCL and SCR are 10% each, 200 W each. That is, the main / sub heating power ratio is 4: 1.
  • the energization control unit 200 uses the driving power of the main heating coil MC, the auxiliary heating coils SCL, and SCR as in the section T1. Make a difference.
  • the magnitude of the total heating power of the two auxiliary heating coils main heating coils SCL, SCR of the main heating coil MC is set to 1: 4.
  • the heating power ratio of the main heating coil MC is set to 20%, and the heating power ratios of the sub heating coils SCL and SCR are set to 40%.
  • the state returns to the state of the section T1 again, and in the next section T4, the driving is performed again in the state of the section T2, but in the next section T5, the driving of the main heating coil MC and all the sub-heating coils SCL, SCR is suspended. To do.
  • This rest period is particularly effective when a deep pot contains a large amount of cooking liquid, such as stew, soup, curry or the like, or a liquid having a higher specific gravity than water. That is, if the heating is stopped for a short time instead of continuously heating, the flow of the liquid is temporarily stopped during the resting period, and a reverse convection is likely to occur in this state.
  • an upward flow is generated toward the top of the seed heating coil MC in the center at the beginning (when the main heating coil MC is in the ON state), and then in the direction directly above the sub-heating coils SCL and SCR. A rising flow is generated (with the sub-heating coil turned on).
  • a pause section T5 is provided after the sections T1 to T4.
  • a pause section such as the section T5 may be provided after the operations of the sections T1 and T2 are further repeated several times.
  • the intervals (time) of T1, T2, and the subsequent sections such as T3, T4, T5, etc. need not be the same.
  • the interval T5 during which the driving is stopped may be several seconds, for example, so that there is almost no influence that prolongs the entire cooking time.
  • the first sub-heating coil SC1 and the second sub-heating coil SC2 are divided into sections.
  • the thermal power ratio in T1 may be 5% each, and the third sub-heating coil SC3 and the fourth sub-heating coil SC4 may each have a thermal power ratio in the section T1 of 5%.
  • the annular main heating coil MC and the four flat sub-heating coils SC1 to SC having a lateral width smaller than the radius of the main heating coil are arranged close to the side of the main heating coil.
  • SC4 inverter circuits MIV, SIV1 to SIV4 that supply induction heating power to the main heating coil MC and all the sub-heating coils SC, an energization control unit 200 that controls the output of the inverter circuit, and the energization control unit And an operation unit E for instructing at least one of a heating operation or a condition to 200, and the energization control unit 200 supplies the first to fourth sub-heating coils from the inverter circuit MIV in the section T1. Supplying a larger amount of electric power (ratio to the whole is 80%) to the main heating coil MC.
  • the induction heating power supplied to the first to fourth sub-heating coils SC1 to SC4 is increased (the proportion of the total is increased to 80%), and the first to fourth sub-heatings are increased.
  • Electric power smaller than the sum of the electric power supplied to the coils (20% of the total) is supplied from the inverter circuit MIV to the main heating coil, and the energization control unit 200 includes the main heating coil MC and the sub-heating.
  • the energization switching operation shown in the sections T1 and T2 with respect to the coils SC1 to SC4 is repeated a plurality of times, thereby promoting the generation of convection in a liquid such as water or boiled juice in the heated object.
  • the second burn suppression control which is a feature of the present invention, will be described.
  • the temperature detection circuit 31 detects that the temperature of the article N to be heated has risen up to, for example, 98 ° C. after boiling or just before boiling, or when it is close to the boiling state from the elapsed time from the start of cooking
  • the energization control unit 200 it is desirable that the burn-in suppression control is started immediately after the operation, for example, immediately after the operation, but in the case of a specific cooking menu, it is in a boiling state. As long as the user does not prohibit or stops heating halfway, it may automatically shift to the burn suppression control.
  • This control relates to the tenth and eleventh aspects of the invention.
  • the main heating coil MC and the sub-heating coils SC1 to SC4 are simultaneously heated. After the temperature detection circuit 31 detects a predetermined temperature, the main heating coil MC The drive power of the coil MC and the sub-heating coils SC1 to SC4 is suppressed to be small.
  • a circular main heating coil MC and four sub-heating coils SC1 to SC4 constitute an induction heating unit, and when these heating coils are driven, and as shown in FIG. 7, the main heating coil MC
  • Any of the two sub-heating coils SCL and SCR having a symmetrical shape arranged on both sides with respect to each other may be used, but FIG. 16 will be described based on the former configuration.
  • PW2 to PW7 indicate thermal power, respectively.
  • the magnitude of the number is not necessarily the magnitude of the thermal power value.
  • PW7 and PW6 may exhibit greater thermal power than PW7, but may be equivalent or may be smaller than PW6.
  • the energization control unit 200 drives the main heating coil MC with the first heating power PW7 as in the section T1.
  • the auxiliary heating coils SC1 to SC4 are driven by the third heating power PW6.
  • PW7 is set to 700 W, for example, and PW6 is set to 600 W, for example.
  • the main / sub heating power ratio in the section T1 becomes 7:24.
  • the heating power of the main heating coil MC is changed from the first heating power PW7 to the third heating power PW3.
  • PW3 is set to 300 W, for example.
  • the heating power of the four sub-heating coils SC1 to SC4 is changed from the second heating power PW6 to the fourth heating power PW2.
  • PW2 is set to 200 W, for example.
  • the section T3 it is driven by the main and auxiliary heating power similar to that in the section T2. Further, in the section T4, the main heating coil MC and all the sub-heating coils SC1 to SC4 are stopped simultaneously.
  • the sections T1 to T4 are performed again with the same energization pattern and heating power.
  • the operations in the sections T1 to T4 may be repeated.
  • the thermal power of the main heating coil MC is changed from the first thermal power PW7 to a smaller thermal power PW5 (however, , Larger than the third thermal power PW3).
  • PW5 is set to 500 W, for example.
  • the heating power of the four sub-heating coil main heating coils SC1 to SC4 is changed from the second heating power PW6 to a smaller heating power PW4 (however, larger than the fourth heating power PW2).
  • PW4 is 400 W, for example.
  • the main-sub heating power ratio in the section T9 becomes 5:16.
  • the next sections T10 and T11 are the same as the section T2.
  • the reason why the heating power of the main heating coil and the auxiliary heating coil was slightly reduced in the section T9 is that the section T1 to T8 (the number of sections may be larger than this) has passed, so This is because the moisture content of the food to be cooked gradually decreases, and there is a concern that scorching may occur when heated with the same heating power for the same time. That is, as shown in this embodiment, reducing the thermal power and shortening the time of the section, which are not shown, are effective in suppressing scorching.
  • FIG. 17A specifically shows the thermal power values of the main heating coil MC and the four sub-heating coils SC1 to SC4 in watts (W) based on the concept shown in FIG.
  • the main heating coil MC is driven at 200 W as the first heating power PW7
  • the four sub-heating coils SC1 to SC4 are driven at 500 W as the second heating power PW6, respectively.
  • 200W of the first thermal power PW7 is changed to 100W as the third thermal power PW2 and driven
  • each of the four sub-heating coils SC1 to SC4 has the second thermal power PW6 (500W) as the fourth thermal power. Driven to 300W of PW2.
  • FIG. 17B shows the thermal power when driving the two sub-heating coils SCL and SCR arranged on both sides of the main heating coil MC as shown in FIG. 7 based on the concept shown in FIG. Values are given in watts (W).
  • the main heating coil MC is driven at 200 W as the first heating power PW7, and the two sub-heating coils SCL and SCR are respectively set at 750 W as the second heating power PW6.
  • 200W of the first thermal power PW7 is changed to the third thermal power 100W and driven, and each of the two sub-heating coils SCL and SCR has a fourth thermal power PW6 (750W). It is driven by being dropped to 350 W of the thermal power PW2.
  • the thermal power values of the second thermal power PW6 and the fourth thermal power PW2 are not the same, but this is mainly because the sizes of the sub-heating coils are different.
  • the first to fourth heating powers vary depending on the dimensions, materials, manufacturing methods, etc. of the main heating coil MC, the sub-heating coils SC1 to SC4, etc. The above example is merely an example.
  • the “not driven” state (“OFF” state) refers to the main heating coil MC and the sub heating coils Even if the heating coils SC1 to SC4, SCL, and SCR are physically energized, the energization result does not cause induction heating to the extent that induction heating can be performed on the article N to be heated. In this case, it means a “not driven” state in the present invention. That is, it does not mean that power is not completely supplied even in the OFF state. For example, in order to exhibit the function of the object-to-be-heated object placement determination unit 400, even when a small amount of electric power that can detect the current flowing through the heating coil by the detection circuit unit 280 is flowing, it is called an OFF state.
  • FIG. 18 shows a state immediately before the cooking menu is selected in the first induction heating unit 6L.
  • the screen of FIG. 18 is displayed first. . That is, for cooking menu selection, selection key E1A for high-speed heating, selection key E1B for boiling water, selection key E1C for boiling, selection key E2A for preheating, cooking rice selection key E2B, fried food selection key E3A, selection key E3B for boiling water and keeping warm The seven keys are displayed all at once (in the list state).
  • the seven keys E1A, E2A, E3A, etc. employ contact-type keys whose capacitance changes when the user touches a finger, etc., and the user has a position corresponding to the key surface.
  • an effective input signal for the energization control unit 200 is generated. That is, characters, figures, etc. indicating the key input function are not displayed by printing or engraving on the surface of the top plate 21 constituting the parts (sections) of the various input keys E1A, E2A, E3A, etc.
  • the display screen 100 below these keys is configured to display characters and figures indicating the key input function for each operation scene of the input keys.
  • FIG. 18 is a screen that appears first when the first induction heating unit 6L is used. Encourage the user to select a cooking menu. Here, if the “boiled” key E1C is touched, the display screen 100 changes as shown in FIG.
  • reference numeral 22 denotes a help key, which is displayed when the user is confused about the operation, performs an incorrect operation, emits an alarm sound, or displays a warning character on the display screen 100.
  • the related information is displayed in characters in the display area 35 of FIG.
  • Reference numeral 23 denotes an information key, which displays information on cooking utensils to be used, cooking method, points to be careful about cooking well, etc. in the display area 35 in detail.
  • reference numeral 24 denotes a cooking menu selection key. When this is touched in the scene of FIG. 19, the screen returns to the scene of FIG. 18, and is used when another cooking menu is to be executed.
  • Reference numeral 25 denotes a thermal power display graphic for displaying the magnitude of the thermal power as a bar graph graphic, and is displayed so that there are 16 in accordance with the 16 levels of thermal power.
  • 26A and 26B are a pair of thermal power adjustment keys. A key 26A with a plus sign increases the thermal power, and a key 26B with a minus sign is for reducing the thermal power. Each time the keys 26A and 26B are touched, the heating power is changed by one step.
  • 28 is a time display unit for displaying the heating time in units of 1 minute
  • 27A and 27B are keys for adjusting the heating time
  • a key 27A with a plus sign increases the time
  • a key 27B with a minus sign Is to save time.
  • the cooking time may not be displayed.
  • the adjustment key 27A, 27B may be used for adjustment. The same applies to firepower.
  • the adjustment keys 27A, 27B, 26A, and 26B are not displayed.
  • 29 is a cooking menu display section
  • 34 is a thermal power display section that indicates the thermal power in numbers
  • 33 is a key for instructing the convection promotion control described above. This key is not always displayed and is not displayed depending on the cooking menu. For example, it is not displayed in the rice cooking mode. In the case of “boiled”, this key 33 is not displayed when convection promotion control is automatically performed after boiling as an initial setting.
  • 32A is a key for starting the heating operation.
  • reference numeral 36 denotes a display area for displaying reference information and the like in characters
  • reference numeral 35 denotes a caution display area for appropriately displaying cautions in characters for safety to the user
  • Reference numeral 37 denotes a name display portion of the cooking menu being executed.
  • the display screen 100 indicates that the main heating coil MC and at least one of the four sub-heating coils SC1 to SC4 are cooperatively heated as shown in FIG.
  • a schematic figure 61 to be displayed to the user as a figure is displayed.
  • the value of the fired power is simultaneously displayed as numeral 62.
  • the switching of energization of the sub-heating coil is also displayed in a figure such as an arrow 61.
  • Each of these displays changes in real time according to the driving state (including the thermal power state) of the main heating coil MC and the four sub-heating coils SC1 to SC4.
  • the display screen 100 changes to a heating stop display. Since the top plate 21 is often at a high temperature even after cooking is finished, the high temperature notification is performed until the top plate 21 becomes a predetermined temperature or lower. Thereafter, the display screen 100 automatically disappears. For this reason, the various keys shown in FIGS. 19 and 20 disappear, and no operation signal is generated even if the displayed position is touched.
  • 63 is a time extension key, which can be operated at any time after the start of cooking. When this key is touched, a time display unit 28 for displaying the heating time in units of 1 minute as shown in FIG.
  • the heating time adjustment keys 27A and 27B appear on the display screen 100.
  • step 1 the main power supply key 50 is operated to turn on the main power supply (step 1.
  • step 2 step is abbreviated as “ST”
  • step 2 the energization control is performed.
  • ST2 the self-diagnosis program of the unit 200 is activated, the presence / absence of an abnormality before heating is checked, and the display unit G is activated (ST2).
  • the object to be heated N is placed on the main heating coil MC and the sub-heating coil SC by the detection circuit unit 280 constituting the object to be heated placement determination unit 400. Whether or not the bottom area of the object N to be heated is larger than a predetermined value, and the estimation result is transmitted to the energization control circuit 100 as a control unit (ST3).
  • the energization control circuit 100 it is determined whether the heat treatment suitable for the large-diameter pan or the heat treatment suitable for the normal pan is performed (a predetermined small current is passed through the heating coil, and the result is detected by the current sensor). . Although it is a suitable pan, in the case of a normal size pan or small pan, or heating nonconformity, etc., the processing is different from the large-diameter pan.
  • a pan having a diameter of about 120 mm to 180 mm on the bottom of the pan is called a “normal pan”, and a pan having a diameter of less than 120 mm is called a “small pan”.
  • These pans are basically the same as the above steps.
  • the diameter here is a diameter of the bottom face of the pan, the diameter dimension of the pan body is larger than this.
  • cooking menus such as “water heater” and “heat retention” are displayed on the display screen 100.
  • this embodiment since heating is performed only by the main heating coil MC at the center, the control content (thermal power, energization pattern, etc.) is greatly different.
  • the display screen 100 displays the screen of FIG. 18 and prompts the user to select a cooking menu (ST4). If a voice guidance device is also used, voice guidance such as “Please select the heating source to be used” is performed at this stage.
  • Basic information for determining whether or not the same heated object N is placed above the current sensor of the main heating coil MC and the four current sensors of the auxiliary heating coil SC is the heated object placement determination unit 400.
  • the current detection unit 280 detects a change in the impedance of the main heating coil MC and the sub-heating coil SC, and a main body on which a rectangular or elliptical pan (object to be heated N) is placed.
  • the energization control circuit 100 is configured so that a high-frequency current is passed through at least one) and the other sub-heating coil on which the elliptical pan (the object N to be heated) is not placed is suppressed or stopped. Emits a command signal.
  • the object-to-be-heated object placement determination unit 400 determines that the same elliptical pan (object to be heated N) is placed above the main heating coil MC and one sub-heating coil SC1,
  • the energization control circuit 100 operates only the main heating coil MC and the specific sub-heating coil SC1 in conjunction with each other, and supplies high frequency power to the two heating coils by the inverter circuits MIV and SIV1 at a predetermined heating power ratio. .
  • thermal power ratio refers to the ratio of main and sub power. For example, when the user starts cooking to cook with 3 KW of thermal power, when the energization control unit 200 distributes the main heating coil MC to 2400 W and the sub-heating coil SC1 to 600 W, the ratio between 2400 W and 600 W I mean. In this example, it is 4: 1.
  • the auxiliary heating coil SC1 alone cannot be driven to perform induction heating cooking, and each of the other three auxiliary heating coils SC2, SC3, SC4 and combinations thereof cannot be induction heating cooked. It has become.
  • any one or more of the four sub-heating coils SC1, SC2, SC3, and SC4 in the vicinity thereof are heated and driven simultaneously. If a heated object N having a large outer diameter is placed so as to cover all of the four sub-heating coils SC1, SC2, SC3, and SC4, the control pattern for driving the four sub-heating coils is energized. It is prepared in the control program of the control circuit 100.
  • the display screen 100 becomes a screen as shown in FIG. 19, and the control conditions necessary for cooking with the boil, such as heating power and time, are displayed. Prompt to set (ST6).
  • the user sets the heating power (ST7), sets the heating time (ST8), and sets the convection promotion control with the key 33 (ST9), the heating operation is started in earnest (ST10). Therefore, inverter circuit 210L is driven (ST11).
  • the energization control unit 200 starts measuring time.
  • the heating power (until boiling) can be set manually.
  • the total heating power of the main heating coil MC and the sub-heating coil is selected by the user from 16 levels in the range from 120 W to 3.0 KW. Since the default value is 2 KW (when the user does not select the heating power, heating is started at 2 KW), heating is started when the heating start key 32A is operated without operating the heating power adjustment keys 26A and 26B.
  • the main / sub heating power ratio is automatically determined by the energization controller 200 so as to be within a predetermined heating power ratio range, and cannot be arbitrarily set by the user.
  • the main / sub power ratio is from 2: 3 to (with small firepower) to 1: 1 (with small firepower).
  • the heating operation is automatically continued at the default value (600 W) so as to maintain the boiling state for 30 minutes continuously (can be extended), but the user may arbitrarily select the heating power after boiling.
  • the heating power adjustment keys 26A and 26B can be operated at any time (see FIG. 20). Even when the heating power is changed, the temperature control circuit 31 constantly monitors the temperature of the object N to be heated.
  • the energization control unit 200 detects the boiling state from the information of the temperature detection circuit 31, and when it is estimated that the boiling state has been reached (ST12), the display screen 100 displays that the boiling state has been reached. If a voice guidance device that cooperates with the display unit G is used in combination, voice guidance such as “hot water has boiled” may be performed at this stage, or a buzzer sound may be emitted.
  • the energization control unit 200 calculates the elapsed time from the heating start time (ST11) to the time when the boiling state is detected (hereinafter referred to as “time required until boiling”), and accumulates it in the built-in semiconductor memory. Subsequently, the subsequent time (hereinafter referred to as “elapsed time after boiling”) is measured.
  • the heating power is automatically changed to 600 W, when the temperature of the object N to be heated is rapidly lowered immediately after the addition of vegetables or the like to be boiled, the heating power is increased by the action of the temperature detection circuit 31 and returns to the boiling state. And then maintained at 600W.
  • the second convection promotion control is started (ST14).
  • this control simultaneously heats the main heating coil MC and the sub-heating coils SC1 to SC4, but makes a difference in the driving power of the main heating coil MC and the sub-heating coils SC1 to SC4. That is, power smaller than the induction heating power supplied to the main heating coil MC is supplied to each of the sub heating coils SC1 to SC4, and then the induction heating power supplied to each of the sub heating coils SC1 to SC4 is increased, Electric power smaller than this electric power is supplied to the main heating coil MC, and these operations are repeated a plurality of times.
  • this control as shown in FIG.
  • the heating part of the object N to be heated is located immediately above the main heating coil MC, directly above the auxiliary heating coils SC1 to SC4, and between the auxiliary heating coils. It becomes a part that spans. At this time, since the heating power of the main heating coil MC is stronger, the main heating coil MC is heated at the portion directly above and a flow rising in the YC1 direction is generated. If the noodles are boiled with only the main heating coil MC, convection continues to occur in the direction of the outer YC1, and blown out.
  • the energization control unit 200 determines whether the cooking liquid, water, vegetables, meat, etc. are contained in the pan of the object N to be heated from the data such as the length of time required for boiling and the thermal power value up to that time. Estimate whether there are a lot of ingredients. For example, even if a large pan is heated at 3 KW, the “time required to boil” is long. For example, the data for the time required to raise 1 liter of hot water from 20 ° C. to 100 ° C. at 3 KW is controlled. Since the part 200 has, it is estimated from the comparison result with it that the liquid of 2 liters or more was heated. In such a large amount of cooking liquid, there is a concern about the occurrence of scorching or spilling, so the energization control unit 200 selects a control method that is determined to be most suitable for such a situation.
  • the induction heating cooker according to the first invention has the following configuration as shown in FIG. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat shape disposed in the vicinity of the side of the main heating coil MC and having a lateral width smaller than the radius of the main heating coil.
  • First inverter heating coil SC1 and second auxiliary heating coil SC2 inverter circuits MIV, SIV1 and SIV2 for supplying induction heating power to the main heating coil MC and first and second auxiliary heating coils, respectively, and the inverter circuit
  • an operation unit E that instructs the control unit to perform at least one of heating operation or conditions.
  • the energization control unit 200 includes the first sub-heating coil. A period T1 during which no induction heating power is supplied to SC1 and the second sub-heating coil SC2 is provided, and the inverter is connected to the main heating coil MC during this period T1. A period T2 in which the induction heating power is supplied from the main circuit MIV and thereafter the dielectric heating power supply to the main heating coil MC, the first sub-heating coil SC1, and the second sub-heating coil SC2 is stopped.
  • T5 is provided, and during this period, the dielectric heating power is supplied to the second sub-heating coil SC2, and in the subsequent period T6, the main heating coil MC and the first sub-heating are supplied.
  • the supply of dielectric heating power to the coil SC1 and the second sub-heating coil SC2 is stopped, and the energization control unit 200 controls the main heating coil MC and the first and second sub-heating coils SC1, SC2 during the periods T1 to T6.
  • the energization control operation is repeated a plurality of times. Thereby, burning can be prevented.
  • the induction heating cooker according to the second invention has the following configuration as shown in FIG. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat shape having a lateral width smaller than the radius of the main heating coil, disposed close to the side of the main heating coil.
  • N sub-heating coils SC1 to SC4 (N is a number of 4 or more), inverter circuits MIV, SIV1 to SIV4 for supplying induction heating power to the main heating coil MC and all the sub-heating coils SC, and the inverter
  • An energization control unit 200 that controls an output of the circuit; and an operation unit E that instructs the energization control unit 200 to perform at least one of a heating operation or a condition.
  • the energization control unit 200 includes the first energization control unit 200.
  • a period T1 during which no induction heating power is supplied to the fourth sub-heating coil is provided, and the main heating coil MC is induced from the inverter circuit MIV during the period T1.
  • a period T2 in which the supply of heat is stopped and then the dielectric heating power supply to the main heating coil MC and the first to fourth sub-heating coils SC1 to SC4 is stopped is provided. Thereafter, the main heating coil MC and the second to second heating coils SC1 to SC4 are stopped.
  • a period T3 during which no induction heating power is supplied to the fourth sub-heating coil is provided, and during this period T3, the induction heating power is supplied to the first sub-heating coil SC1, and then the main heating coil MC, first to fourth A period T4 during which the supply of the dielectric heating power to the sub-heating coils SC1 to SC4 is stopped is provided, and then the dielectric heating power is supplied to the main heating coil MC, the first sub-heating coil SC1, and the third to fourth sub-heating coils SC3 and SC4.
  • a period T5 during which no power is supplied is provided, and during this period T5, dielectric heating power is supplied to the second sub-heating coil SC2, and thereafter, the main heating coil MC and the first to fourth sub-heating coils SC1 to SC4 are supplied.
  • a period T6 in which the supply of dielectric heating power is stopped is provided, and thereafter a period T7 in which no induction heating power is supplied to the main heating coil MC and the first and second sub-heating coils SC1, SC2, and the fourth sub-heating coil SC4 is provided.
  • period T8 the induction heating power is supplied to the third sub-heating coil SC3 during the period T7, and then the dielectric heating power supply to the main heating coil MC and the first to fourth sub-heating coils SC1 to SC4 is stopped. After that, a period T9 in which the supply of the dielectric heating power to the main heating coil MC and the first to third sub-heating coils SC1 to SC3 is stopped is provided. During this period T9, the fourth sub-heating coil SC4 has a dielectric heating power.
  • a period T10 in which no dielectric heating power is supplied to the main heating coil MC and all the sub-heating coils SC1 to SC4 is provided, and the energization control unit 200
  • the energization control operation in the period T1 to T8 for the thermal coil MC and the first to fourth sub-heating coils SC1 to SC4 is repeated a plurality of times. Thereby, burning can be prevented.
  • the induction heating cooker according to the third aspect of the invention has the following configuration, particularly as shown in FIGS. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat surface that is disposed close to each side of the main heating coil and has a width that is smaller than the radius of the main heating coil.
  • N-shaped sub-heating coils SC1 to SC4 (N is a number of 4 or more), inverter circuits MIV, SIV1 to SIV4 for supplying induction heating power to the main heating coil MC and all the sub-heating coils SC, An energization control unit 200 for controlling the output of the inverter circuit, and an operation unit E for instructing the control unit to perform at least one of heating operation or conditions, and the sub-heating coils SC1 to SC4 are half
  • the first set (SC1 and SC2) consisting of less than the total number of adjacent sub-heating coils and the second set (SC3 and SC4) consisting of the remaining sub-heating coils.
  • the energization control unit 200 provides a period T1 during which no dielectric heating power is supplied to the first and second sets of sub-heating coils, and the main heating coil MC is supplied to the main heating coil MC from the inverter circuit during the period T1.
  • a period T2 in which the induction heating power is supplied and then the dielectric heating power supply to the main heating coil MC and the first and second sets of sub-heating coils is stopped is provided, and then the main heating coil and
  • a period T3 in which the supply of dielectric heating power to the second set of sub-heating coils is stopped is provided, and during this period T3, the first set of sub-heating coils (SC1 and SC2) is supplied with dielectric heating power from the inverter circuit.
  • a period T6 in which the dielectric heating power is supplied and then the dielectric heating power supply to the main heating coil and the first and second sets of sub-heating coils is stopped is provided.
  • the energization switching operation of the periods T1 to T6 for the main heating coil MC, the first set of sub-heating coils SC1, SC2, and the second set of sub-heating coils SC3, SC4 is repeated a plurality of times. Thereby, burning can be prevented.
  • the induction cooking device has the following configuration as shown in FIGS. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat shape having a lateral width smaller than the radius of the main heating coil, disposed close to the side of the main heating coil.
  • N sub-heating coils SC1 to SC4 (N is a number of 4 or more), inverter circuits MIV, SIV1 to SIV4 for supplying induction heating power to the main heating coil MC and all the sub-heating coils SC, and the inverter
  • An energization control unit 200 that controls the output of the circuit, and an operation unit E that instructs the energization control unit 200 to perform at least one of heating operation or conditions
  • the sub-heating coil SC is more than half
  • a first set (SC1 and SC4) consisting of sub-heating coils located on a diagonal line less than the total number
  • SC2 and SC3 consisting of the remaining sub-heating coils.
  • the energization control unit 200 provides a period T1 during which no dielectric heating power is supplied to the first and second sets of sub-heating coils, and the main heating coil MC is connected to the main heating coil MC from the inverter circuit MIV during this period.
  • a period T2 in which the induction heating power is supplied and thereafter the dielectric heating power supply to the main heating coil MC and the sub-heating coils of the first set (SC1 and SC4) and the second set (SC2 and SC3) is stopped.
  • a period T3 in which the supply of dielectric heating power to the main heating coil MC and the second set of sub-heating coils (SC2 and SC3) is stopped is provided, and the first set of sub-heating is provided during this period.
  • Dielectric heating power is supplied to the coils (SC1 and SC4) from the inverter circuit, and thereafter, the dielectric heating power is supplied to the main heating coil and the first and second sets of sub-heating coils.
  • a stopped period T4 is provided, and thereafter, a period T5 is provided during which the dielectric heating power supply to the main heating coil and the first set of sub-heating coils (SC1 and SC4) is stopped.
  • the second set The dielectric heating power is supplied from the inverter circuit to the secondary heating coils (SC2 and SC3), and then the dielectric heating power supply to the main heating coil and the first and second sets of secondary heating coils is stopped.
  • the period T6 is provided, and the controller repeats the energization control operation of the periods T1 to T6 for the main heating coil and the first and second sets of sub-heating coils a plurality of times. Thereby, burning can be prevented.
  • the induction cooking device has the following configuration, particularly as shown in FIGS. That is, the annular main heating coil MC disposed horizontally below the top plate 21 and the side portions of the main heating coil MC are disposed close to each other and have a width dimension smaller than the radius of the main heating coil.
  • Flat N-shaped sub-heating coils SC1 to SC4 (N is a number of 4 or more), and inverter circuits MIV and SIV1 to SIV4 for supplying induction heating power to the main heating coil MC and all the sub-heating coils SC, respectively ,
  • An energization control unit 200 that controls the output of the inverter circuit, and an operation unit E that instructs the energization control unit 200 to perform at least one of heating operation or conditions.
  • a period T1 during which no dielectric heating power is supplied to the sub-heating coil is provided, and the inverter circuit MIV is connected to the main heating coil MC during this period T1.
  • a period T2 in which the induction heating power is supplied and then the dielectric heating power supply to the main heating coil MC and the sub-heating coils SC1 to SC4 is stopped is provided, and then the supply of the dielectric heating power to the main heating coil is stopped.
  • Period T3 is provided, and during this period T3, dielectric heating power is supplied from the inverter circuit to the sub-heating coils SC1 to SC4, and thereafter, the dielectric heating power is supplied to the main heating coil MC and the sub-heating coil SC1.
  • a stop period T4 is provided, and the energization control unit 200 repeats the energization control operation of the periods T1 to T4 for the main heating coil MC and the sub-heating coils SC1 to SC4 a plurality of times.
  • the induction cooking device has the following configuration, particularly as shown in FIG. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat shape disposed in the vicinity of the side of the main heating coil MC and having a lateral width smaller than the radius of the main heating coil.
  • First inverter heating coil SC1 and second auxiliary heating coil SC2 inverter circuits MIV, SIV1 and SIV2 for supplying induction heating power to the main heating coil MC and first and second auxiliary heating coils, respectively, and the inverter circuit
  • an operation unit E that instructs the control unit to perform at least one of a heating operation or conditions.
  • the energization control unit 200 (in the period T1) The main heating coil supplies more power than the power supplied from the inverter circuit to the first sub-heating coil SC1 and the second sub-heating coil SC2. After that (period T2), the induction heating power supplied to the main heating coil MC is reduced, and power larger than this power is supplied from the inverter circuits SIV1, SIV2 to the first sub-heating coil SC1 and The energization control unit 200 repeats the energization control operation of the periods T1 to T2 for the main heating coil MC and the subheating coils SC1 and SC2 a plurality of times. Thereby, generation
  • the induction heating cooker according to the seventh aspect of the invention has the following configuration as shown in FIGS. 13 and 14 in particular. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat surface that is disposed close to each side of the main heating coil and has a width that is smaller than the radius of the main heating coil.
  • N-shaped sub-heating coils SC1 to SC4 (N is a number of 4 or more), inverter circuits MIV, SIV1 to SIV4 for supplying induction heating power to the main heating coil MC and all the sub-heating coils SC,
  • the energization control unit 200 that controls the output of the inverter circuit, and the operation unit E that instructs the energization control unit 200 to perform at least one of heating operation or conditions.
  • T1 a power larger than the power supplied from the inverter circuits SIV1 to SIV4 to all the sub-heating coils SC is supplied.
  • the main heating coil MC is supplied to the main heating coil MC, and thereafter (in the period T2), the induction heating power supplied to the main heating coil MC is reduced, and power larger than this power is supplied from the inverter circuit to all the sub heating coils.
  • the energization control unit 200 repeats the energization control operation of the periods T1 to T2 for the main heating coil MC and the sub-heating coils SC1 to SC4 a plurality of times. Thereby, generation
  • the induction heating cooker according to the eighth invention has the following configuration as shown in FIG. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat shape having a lateral width smaller than the radius of the main heating coil, disposed close to the side of the main heating coil.
  • An energization control unit 200 that controls the output of the inverter circuit; and an operation unit E that instructs the energization control unit 200 to perform at least one of a heating operation or conditions.
  • the energization control unit 200 includes a period T1.
  • the energization control operation for the periods 1 and 2 for SCL and SCR is repeated a plurality of times. Thereby, generation
  • the induction heating cooker according to the ninth invention has the following configuration. That is, an annular main heating coil disposed horizontally below the top plate 21 and a flat N having a lateral width smaller than the radius of the main heating coil, disposed close to the side of the main heating coil.
  • Four sub-heating coils SC1 to SC4 (N is a number of 4 or more), inverter circuits MIV, SIV1 to SIV4 for supplying induction heating power to the main heating coil MC and all the sub-heating coils SC,
  • An energization control unit 200 that controls the output of the inverter circuit; and an operation unit E that instructs the energization control unit 200 to perform at least one of a heating operation or conditions.
  • the energization control unit 200 includes a period T1. Then, the electric power ((20% of the total is 20%) larger than the total electric power supplied from the inverter circuit MIV to the first to fourth sub-heating coils (( 80% of the body is supplied to the main heating coil MC, and thereafter, the induction heating power supplied to the first to fourth sub-heating coils SC1 to SC4 is increased during the period T2 (entirely) , And a power smaller than the total power supplied to the first to fourth sub-heating coils (20% of the total) is transferred from the inverter circuit MIV to the main heating coil MC.
  • the energization control unit 200 repeats the energization operation shown in the periods T1 and T2 for the main heating coil MC and the sub-heating coils SC1 to SC4 a plurality of times. It is possible to promote the occurrence of convection in liquids such as water and boiled juice.
  • the induction heating cooker according to the tenth aspect of the invention has the following configuration, particularly as shown in FIG. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat surface disposed near the side of the main heating coil MC and having a lateral width smaller than the radius of the main heating coil MC.
  • An energization control unit 200 that controls the output of the inverter circuit, and an operation unit E that instructs the energization control unit 200 to perform at least one of heating operation or conditions.
  • the first heating coil MC Induction heating power is supplied from the inverter circuits SIV1 and SIV2 to the sub-heating coil SC1 and the second sub-heating coil SC2 by the second heating power PW2, and then the main heating coil MC is supplied from the inverter circuit MIV to the first heating power.
  • the first heating power SC1 and the second auxiliary heating coil SC2 are supplied from the inverter circuits SIV1 and SIV2 to the second heating power PW2.
  • the induction heating power is supplied with a small fourth thermal power PW4.
  • the induction heating cooker according to the eleventh aspect of the invention has the following configuration as shown in FIG. That is, an annular main heating coil MC disposed horizontally below the top plate 21 and a flat shape disposed in the vicinity of the side of the main heating coil MC and having a lateral width smaller than the radius of the main heating coil.
  • N sub-heating coils SC1 to SC4 (N is a number of 4 or more), inverter circuits MIV, SIV1 to SIV4 for supplying induction heating power to the main heating coil MC and all the sub-heating coils SC,
  • An energization control unit 200 that controls the output of the inverter circuit; and an operation unit E that instructs the energization control unit 200 to perform at least one of a heating operation and a condition.
  • the first to fourth sub-heating coils C1 to SC4 are supplied with induction heating power from the inverter circuits SIV1 to SIV4 by the second heating power PW2, and then the third heating power PW3 smaller than the first heating power PW1 from the inverter circuit MIV to the main heating coil MC.
  • the first to fourth sub-heating coils SC1 to SC4 are supplied with induction heating power from the inverter circuits SIV1 to SIV4 with a fourth heating power PW4 smaller than the second heating power PW2. Are supplied respectively. Thereby, uneven heating can be made uniform.
  • An induction heating cooker is an annular main heating coil installed horizontally below a horizontal top plate 21 as shown in FIGS. 6, 9, 11 and 12 in particular.
  • MC is arranged at equal intervals on a concentric circle with the main heating coil so as to surround the outer periphery of the main heating coil MC, and a portion facing the main heating coil MC is curved along the outer peripheral edge of the main heating coil MC.
  • Inductive heating power is supplied to the first sub-heating coils SCL, SC1, SC2 and the second sub-heating coils SCR, SC4, SC3 having the same shape, and the main heating coil MC and the first and second sub-heating coils, respectively.
  • the control period for controlling energization is divided into four or more consecutive periods T1 to T4.
  • the main heating coil In the first period 1 (T1), the main heating coil is driven and the two sub-heating coils are not driven, and the next period 2 ( T2) does not drive the main heating coil and all the sub-heating coils, and the next period 3 (T3) does not drive one or all of the sub-heating coils to drive the main heating coil, and the next period 4 In (T4), the main heating coil and all sub-heating coils
  • the energization control unit 200 repeats the energization control operations of the sections 1 to 4 a total of a plurality of times, and the energization control unit 200 further includes the main heating coil, the first sub-heating coil, and the second
  • the direction of the high-frequency currents IA and IB flowing in the area adjacent to the sub-heating coil is set to either the same direction or the reverse direction according to the cooking menu commanded from the operation unit E.
  • the induction heating part is composed of a circular main heating coil MC and a sub-heating coil whose opposing portion (side) is curved so as to follow the outer peripheral shape thereof, the drive and non-drive of both are temporally driven.
  • the control may be performed in the same direction when the temperature is low and in the reverse direction after boiling.
  • the operations of the energization control unit 200, the temperature detection circuit 31, the heated object placement determination unit 400, and the like described in the present invention are performed by electronic devices and information devices including a microcomputer and various semiconductor storage devices (ROM, RAM, etc.) It can be realized and provided in the form of a program that can be executed on the computer. Therefore, it can be distributed via the recording medium in the form of the program, or distributed using the Internet communication line, and by the work such as distribution, update, installation, etc. of the new control function shown in the present invention It can also be expected to provide a cooking device with improved usability.
  • the energization control unit 200 When the temperature detection circuit 31 detects a predetermined temperature, for example, a boiling state (about 100 ° C.) or a temperature just before that (for example, 98 ° C.), the energization control unit 200 performs the main heating coil MC and the sub heating coil after the detection.
  • the energization state is controlled according to a predetermined section, but when a plurality of sections have passed, as described above, the heating power for each single period (section) is reduced, or the time interval of the section is shortened. You may employ
  • the amount of heat for heating the object to be heated N (for example, the cumulative amount of heat in the subsequent three sections) is reduced, the occurrence of scorching occurs even when the moisture content of the object to be cooked is gradually decreasing. The effect that it can be suppressed can be further expected.
  • a temperature sensor is provided in the vicinity of the main heating coil MC and the auxiliary heating coil SC1 or in the space inside thereof so that the temperature of the main heating coil MC and the auxiliary heating coil, for example, the region heated by the SC1 in FIG.
  • Each can be provided and the following control can be performed to further prevent burn-in.
  • the temperature detection circuit 31 drives one of the sub-heating coils SC1 with a predetermined heating power
  • the temperature detection circuit 31 detects how many times the partial temperature of the pan above the sub-heating coil SC1 is. (At this time, the main heating coil MC may be driven simultaneously).
  • the energization control unit 200 performs comparison determination processing in this way.
  • the energization control unit 200 determines that the viscosity of the liquid to be cooked (for example, curry) is high.
  • the energization state of the main heating coil MC and the sub heating coil is changed (for example, the total heating power is reduced by one step so that the whole main / sub heating coil is reduced to 875 W or two steps and is reduced to 750 W or less.
  • the energization control unit 200 determines that the viscosity of the liquid to be cooked (for example, curry) is low (for example, the temperature of the curry is increased). Along with this, the viscosity becomes lower from the middle).
  • the convection promotion control as described above is performed. However, if it is determined that the viscosity is still high, a unit for the object N to be heated, such as adopting a control that reduces the heating power for each single period (section) or shortens the time width of each period. A process of reducing the heating amount per time (for example, 10 seconds) is performed. As described above, it is possible to prevent the heating from being continued by inadvertently supplying a large heating power, and the effect of further suppressing the occurrence of scorching can be expected.
  • the temperature of a region heated by a pair of sub-heating coils on both sides of the main heating coil MC can be individually detected. It is desirable to provide temperature sensors at two or more locations (with the main heating coil MC in between) because the temperature change of the entire pan can be grasped more accurately.
  • the induction heating cooker according to the present invention is a heating drive that combines a main heating coil and a sub-heating coil, and can suppress scorching during stew cooking, etc., so it is dedicated to stationary and built-in induction heating sources It can be widely used in a combined induction heating cooker with a cooker and other radiant heating sources.

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

Abstract

L'invention concerne un dispositif de cuisson à chauffage par induction d'un type de chauffage et un programme pour le dispositif de cuisson à chauffage par induction, le dispositif de cuisson à chauffage par induction étant apte à produire de manière efficace une convexion dans le liquide dans un récipient de cuisson et d'empêcher qu'il brûle et qu'il colle. Le dispositif de cuisson à chauffage par induction a : une bobine de chauffage principale (MC) ; une pluralité de sous-bobines de chauffage (SC1 à SC4) ayant une forme plus plate que celle de la bobine de chauffage principale ; des circuits inverseurs (MIV, SIV) destinés à fournir des courants de chauffage par induction à la bobine de chauffage principale (MC) et à toutes les sous-bobines de chauffage (SC1 à SC4), respectivement, et une partie de commande d'attaque (200) destinée à donner instruction à chacun des circuits inverseurs d'exécuter un motif d'attaque correspondant à un menu de cuisson. La partie de commande d'attaque (200) fournit du courant simultanément à la bobine de chauffage principale (MC) et aux sous-bobines de chauffage (SC1 à SC4) durant une période prédéterminée et ne fournit pas de courant à la bobine de chauffage principale mais fournit du courant aux sous-bobines de chauffage durant l'autre période. Par instruction aux circuits inverseurs (MIV, SIV) de répéter les opérations exécutées durant ces deux types de périodes, un motif de chauffage est exécuté dans lequel une région du récipient chauffé par induction et le courant de chauffage sont modifiés dans le temps.
PCT/JP2012/002626 2011-05-24 2012-04-16 Dispositif de cuisson à chauffage par induction et programme pour celui-ci WO2012160750A1 (fr)

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JP2015034638A (ja) * 2013-07-08 2015-02-19 シャープ株式会社 加熱調理器
US10520199B2 (en) 2017-03-08 2019-12-31 Louis S. Polster Methods and systems for heat treating a food product

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JP2008269885A (ja) * 2007-04-18 2008-11-06 Mitsubishi Electric Corp 加熱調理器
JP2008287923A (ja) * 2007-05-15 2008-11-27 Mitsubishi Electric Corp 誘導加熱調理器
JP2010073384A (ja) * 2008-09-17 2010-04-02 Panasonic Corp 誘導加熱調理器
WO2010101202A1 (fr) * 2009-03-06 2010-09-10 三菱電機株式会社 Dispositif de cuisson par induction
JP2010244925A (ja) * 2009-04-08 2010-10-28 Panasonic Corp 誘導加熱調理器
JP2010262774A (ja) * 2009-04-30 2010-11-18 Mitsubishi Electric Corp 誘導加熱調理器

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JP2008269885A (ja) * 2007-04-18 2008-11-06 Mitsubishi Electric Corp 加熱調理器
JP2008287923A (ja) * 2007-05-15 2008-11-27 Mitsubishi Electric Corp 誘導加熱調理器
JP2010073384A (ja) * 2008-09-17 2010-04-02 Panasonic Corp 誘導加熱調理器
WO2010101202A1 (fr) * 2009-03-06 2010-09-10 三菱電機株式会社 Dispositif de cuisson par induction
JP2010244925A (ja) * 2009-04-08 2010-10-28 Panasonic Corp 誘導加熱調理器
JP2010262774A (ja) * 2009-04-30 2010-11-18 Mitsubishi Electric Corp 誘導加熱調理器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015034638A (ja) * 2013-07-08 2015-02-19 シャープ株式会社 加熱調理器
US10520199B2 (en) 2017-03-08 2019-12-31 Louis S. Polster Methods and systems for heat treating a food product
US11674691B2 (en) 2017-03-08 2023-06-13 Mary Noel Henderson Methods and systems for heat treating a food product

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