KR20190109935A - Heating device for determining type of cooking practicable in object to be heated - Google Patents

Abstract

According to an embodiment of the present invention, a heating device of an induction heating type comprises: a coil which is electromagnetically coupled to an object to be heated placed on a burner, and induces current to the object to be heated by receiving alternating current power of a predetermined operation frequency, so as to heat the object to be heated, in an operation mode of the heating device; a coupling characteristic measurement unit which generates a result of measuring electromagnetic coupling characteristics between the coil and the object to be heated by using alternating current characteristic of an equivalent circuit of the coil and the object to be heated, in a determination mode of determining a type of cooking which can be performed in the object to be heated; a control unit which determines whether the object to be heated exists on the burner, and if the object to be heated exists on the burner, determines the type of cooking which can be performed in the object to be heated based on the result of measuring the electromagnetic coupling characteristics and a cooking type database stored in the heating device, in the determination mode; and a display unit which receives a cooking type determination result from the control unit and notifies the cooking type determination result to a user.

Description

HEATING DEVICE FOR DETERMINING TYPE OF COOKING PRACTICABLE IN OBJECT TO BE HEATED}

The technical idea of the present disclosure relates to a heating device, and more particularly, to a heating device for determining a cooking type executable on a heated object mounted on the heating device.

Various types of heating devices are used in homes and restaurants for various purposes, including cooking or sterilization. Conventionally, gas ranges using gas as fuel have been widely used, and in recent years, heating devices for heating a heated object such as a pot, a frying pan, a steamer or a kettle by using electricity have been made.

Electric heating methods include a resistance heating method and an induction heating method. The resistance heating method is a method of heating an object by directly transferring heat generated when a current flows through a non-metallic heating element such as a metal resistance wire or silicon carbide to the heating object through radiation or conduction. On the other hand, the induction heating method is a method of heating the heated object by generating an induced current in the heated object by using a change in the magnetic field generated around the coil when applying a high frequency power to the coil.

In the case of a heating apparatus using an induction heating method, since the heating target body is heated by an induction current flowing through the heating target body due to a change in the magnetic field, the heating efficiency may vary depending on the characteristics of the heating target body. The heating efficiency may vary depending on the characteristics of the object to be heated, and thus, a user may feel inconvenience in use, and a method for solving such a problem is required.

The technical idea of the present disclosure provides a method and apparatus for providing a device for determining a cooking type executable in a heated object placed in a heating device in accordance with a characteristic of a heated object.

In order to achieve the above object, the heating device of the induction heating method according to an aspect of the technical idea of the present disclosure, in the operating mode of the heating device, is electromagnetically coupled to the heating element mounted on the crater, In the judgment mode of determining a cooking type that can be executed in the coil and the coil to heat the heated object by inducing a current to the heated object by receiving AC power of an operating frequency of the alternating current of the coil and the equivalent circuit of the heated object. Coupling characteristics measuring unit that generates the result of measuring the electromagnetic coupling characteristics between the coil and the heating element using the characteristic characteristics, in the judgment mode, it is determined whether the heating element is on the fire zone, and the heating element is on the fire zone. If present, the cooking type viable on the heating target is based on the measurement results of the electromagnetic coupling properties and the cooking type database stored in the heating unit. The control unit may include a determination unit, and a display unit configured to receive a cooking type determination result from the control unit and inform the user of the cooking type determination result.

According to a heating apparatus according to an exemplary embodiment of the present disclosure, by determining the electromagnetic coupling characteristics between the coil and the heating body by using the alternating characteristics of the coil and the heating body to determine the cooking type executable in the heating body. And may inform the user of a list of viable cooking types to help the user selectively perform cooking according to the heating object.

1 illustrates a heating device, an external power source, and a heated object according to an exemplary embodiment of the present disclosure.
2 illustrates a heating device and an external power source according to an exemplary embodiment of the present disclosure.
3 is a flowchart illustrating a cooking type determination method executable in a heated object according to an exemplary embodiment of the present disclosure.
4 illustrates a graph of frequency characteristics of average power consumed by an equivalent circuit of a coil and a heated object according to an exemplary embodiment of the present disclosure.
5 illustrates heated object rating criteria information according to an exemplary embodiment of the present disclosure.
6 illustrates a coupling characteristic measurer and a controller according to an exemplary embodiment of the present disclosure.
7 illustrates heated object rating criteria information according to an exemplary embodiment of the present disclosure.
8A and 8B illustrate a cooking type database according to an exemplary embodiment of the present disclosure.
9 is a flowchart illustrating a control operation after a cooking type selection is made by a user according to an exemplary embodiment of the present disclosure.
10 illustrates a cooking type database according to an exemplary embodiment of the present disclosure.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 illustrates a heating apparatus 10, an external power source 20, and a heating target body 30 according to an exemplary embodiment of the present disclosure. The heating device 10 may receive electric power from the external power source 20, and heat the heated object 30 placed on the crater of the heating device 10 by using the electric power supplied from the external power source 20. have. Although FIG. 1 shows that the heating device 10 includes one crater, this is for convenience of description only and the heating device 10 may include a plurality of craters.

The heating device 10 may include a coil 100, a coupling characteristic measurement unit 200, a cooking type determination unit 320, a display unit 400, and a power supply unit 500. As a non-limiting example, the heating device 10 may be an electric range for heating the heating element on the fireball through a heating unit corresponding to the fireball using electricity as an energy source.

The mode in which the heating device 10 heats the heated object 30 may be referred to as an operation mode. The heating device 10 according to the technical spirit of the present disclosure may determine the cooking type executable in the heating object 30, and the heating device 10 determines the cooking type executable in the heating object 30. The mode of the section will be referred to as a determination mode. The determination mode may be located in the middle of the operation mode.

The coil 100 may receive AC power from the power supply unit 500 and generate a magnetic field that changes with time by the supplied AC power. The change in the magnetic field generated by the coil 100 may cause a change in the magnetic flux around the heated object 30, and a current may be induced in the heated object 30 due to the change in the magnetic flux. The coil 100 may be referred to as a walking coil. The coil 100 may be electromagnetically coupled with an inductor of the heating element 30.

The coupling characteristic measuring unit 200 may measure the electromagnetic coupling characteristic CHAR_COMB between the coil 100 and the heated body 30 in an evaluation mode for evaluating the suitability of the heated object 30. The electromagnetic coupling characteristic (CHAR_COMB) is a concept including the overall circuit characteristics according to the coupling of the inductor of the coil 100 and the heating element 30. The inductance value L_coil of the coil 100, the heating element The inductance value L_load of the inductor 30, the resistance value R_load of the load resistance of the heating element 30, and the coupling ratio (or winding ratio) of the inductor of the coil 100 and the heating element 30, and the like. May include varying circuit characteristics. For example, the coupling characteristic measuring unit 200 may measure the average power consumed by the coil 100 and the heating element 30 when AC power of a specific frequency is applied to the coil 100. Can be measured as However, the present disclosure is not limited thereto. For example, the coupling characteristic measurer 200 may convert the equivalent impedance Zeq between the first node Nd1 and the second node Nd2 across the coil 100 to an electromagnetic coupling characteristic. Can be measured as (CHAR_COMB). The coupling characteristic measurer 200 may provide the measured electromagnetic coupling characteristic CHAR_COMB to the cooking type determiner 320. Coupling characteristic measurement unit 200 may be implemented as hardware, such as a separate chip or circuit on the PCB, may be implemented as software implemented by the control unit (300 of FIG. 2), some are implemented in hardware and the rest Some may be a combination of hardware and software implemented in software.

The cooking type determination unit 320 may receive an electromagnetic coupling characteristic CHAR_COMB between the coil 100 and the object to be heated 30 received from the coupling characteristic measurement unit 200. In the determination mode, when the heating element 30 is present on the crater corresponding to the coil 100, the cooking type determination unit 320 is based on the received electromagnetic coupling characteristic CHAR_COMB and the cooking type database. It is possible to determine the cooking type executable in the heated object 30. The cooking type determination unit 320 may be included in the control unit 300 of the heating apparatus 10. The cooking type determination unit 320 may provide the display unit 400 with a cooking type determination result RST_TYPE indicating a result of determining a cooking type executable in the heated object. The cooking type database and the cooking type determination result RST_TYPE will be described in more detail with reference to the following drawings.

The display unit 400 may provide various information about the operation of the heating apparatus 10 by a visual method, an audio method, or a method through other senses. To this end, the display unit 400 may include a display unit and / or a speaker. The display unit 400 may inform the user of the cooking type determination result RST_TYPE received from the cooking type determination unit 320. For example, the display unit 400 may inform the user of the cooking type determination result RST_TYPE by unpacking and displaying the received cooking type determination result RST_TYPE in terms that the user can easily recognize.

The power supply unit 500 may supply high frequency AC power to the coil 100 using AC power received from the external power source 20. To this end, the power supply unit 500 may include a DC link generation unit 520 of FIG. 2, a switching unit 540 of FIG. 2, and at least one capacitor C of FIG. 2. This will be described in more detail with reference to FIG. 2.

The external power source 20 may supply power to the heating device 10. The external power source 20 may be a commercial power source connected to the power input terminal of the heating device 10. The commercial power source may include an AC power source having a 110V AC power source, a 220V AC power source, a 380V AC power source or any other voltage level depending on the country and / or region of use.

The object to be heated 30 may represent an object heated by the heating device 10. The heated object 30 may include at least one of heated containers such as a pot, a frying pan, a steamer, a kettle, and a teapot. The object to be heated 30 may be represented as an equivalent circuit having a load inductor coupled to a load inductor electromagnetically coupled with the coil 100 of the heating device 10. By applying AC power to the coil 100 of the heating device 10, the magnetic field and magnetic flux around the inductor of the heating element 30 electromagnetically coupled with the coil 100. In this case, a current may be induced in the inductor and the load resistance of the heating element 30. As the inductive current flows to the load resistor, the load resistor can generate heat, and the heated object 30 can be heated by heat generated from the load resistor.

The electromagnetically coupled coil 100 and the heated object 30 between the first node Nd1 and the second node Nd2 are equivalently connected in series between the first node Nd1 and the second node Nd2. It can be represented as the equivalent circuit 35 of equivalent impedance Zeq including an inductor and equivalent resistance. The real part and the imaginary part of the equivalent impedance Zeq may include an equivalent resistance value Req and an equivalent impedance value Leq, respectively. The equivalent inductance value Leq and the equivalent resistance value Req according to the inductance value L_load of the object to be heated 30, the load resistance value R_load and the coupling degree of the inductor of the coil 100 and the object to be heated 30. ) May vary. Therefore, even if the power supply unit 500 supplies an AC voltage having the same duty ratio of the same frequency, the inductance value L_load, the load resistance value R_load and the coil 100 and the heating element ( Depending on the coupling degree of the inductor of 30), the average power value consumed in the heating element 30 may vary. That is, an output for heating the heated object 30 may vary.

On the other hand, the cooking type is a type of cooking performed by heating the to-be-heated body 30, and may be a concept including a wide range of cooking types such as steaming, frying, roasting, and roasting. However, the present invention is not limited thereto. For example, the cooking type may be a concept including a specific range of cooking types such as braised beef ribs, pork ribs, duck duck, fried shrimp, fried chicken fries, fried squid and grilled mackerel. . In addition, the selection of the term 'cooking type' is for convenience of description, and the broad 'cooking type' may include all operations that can be performed in the heated object 30 by heating the heated object 30. have. For example, the cooking type in a broad sense may include an operation of boiling or sterilizing a specific object in the heated object 30.

On the other hand, the cooking types may differ in the environment required for the execution depending on the type. For example, cooking types may vary in the range of temperatures required for their practice. As a non-limiting example, in the case of 'frying' among cooking types, when cooking is performed at a temperature of 160 degrees to 170 degrees Celsius, cooking may not be normally performed. Therefore, in the case of a cooking type such as 'fried', it may not be able to be normally executed in the heating target body 30 having low heating output. Therefore, there may be a cooking type that can be executed in the heating object 30 and a cooking type that cannot be executed according to the characteristics of the heating object 30. In addition, there may be a cooking type that can be cooked well in the heated body 30, that is, optimized for the heated body 30, depending on the characteristics of the heated body 30. Therefore, the user may need to selectively perform cooking according to the heated object 30.

According to the heating device 10 according to an exemplary embodiment of the present disclosure, the coupling characteristic measuring unit 200 measures the electromagnetic coupling characteristics of the coil 100 and the object to be heated 30, and determines the cooking type determination unit ( The 320 determines the type of cooking that can be executed in the heated object 30, and the display unit 400 notifies the user of the cooking type determination result RST_TYPE, thereby allowing the user to selectively cook according to the heated object 30. Can help you to run

2 shows a heating device 10 and an external power source 20 according to an exemplary embodiment of the present disclosure. The description overlapping with FIG. 1 regarding the heating apparatus 10 and the external power supply 20 of FIG. 2 is abbreviate | omitted.

The heating device 10 may include a control unit 300. The controller 300 may control overall operations of various components in the heating apparatus 10. The controller 300 may be implemented in various forms such as a central processing unit (CPU), a processor, a microprocessor, an application processor (AP), a micro controller unit (MCU), a microcomputer, or a minicomputer. .

The controller 300 may include a cooking type determiner 320 and a switching controller 340. The cooking type determination unit 320 and the switching control unit 340 may be implemented in hardware, such as separate chips or circuits, respectively, or a series of algorithms each of which is performed is stored in the memory 600 as software, and the control unit ( 300 may perform the operations of the cooking type determiner 320 and the switching controller 340 by loading the algorithm stored in the memory 600. However, the present invention is not limited thereto, and the cooking type determination unit 320 and the switching control unit 340 may be implemented as a combination of hardware and software.

The switching controller 340 may control the switching operation of the switching unit 540. For example, the switching controller 340 may control the frequency of the AC voltage supplied by the switching unit 540 by adjusting the switching period, and the switching unit 540 is supplied by adjusting the switching duty ratio. The amount of AC power can be controlled.

The power supply unit 500 may include a DC link generation unit 520, a switching unit 540, and at least one capacitor C.

The DC link generator 520 may generate a DC voltage using an AC voltage received from the external power source 20. The DC link generator 520 may be implemented using various types of rectifier circuits or rectifiers.

The switching unit 540 may change a DC voltage provided by the DC link generation unit 520 into an AC voltage according to a switching control signal received by the switching controller 340. If necessary, the switching unit 540 may generate an AC voltage having a higher frequency than an AC voltage received from the external power source 20. The switching unit 540 may be implemented as an inverter.

At least one capacitor C may be connected to the switching unit 540 in series with the equivalent circuit 35 of the coil and the heating object. As a result, a high frequency AC voltage may be applied by the switching unit 540 across the circuit in which the equivalent circuit 35 and the capacitor C are connected in series. For example, if the equivalent circuit 35 is represented by the series connection of the equivalent inductor and equivalent resistor of FIG. 1, the equivalent resistance having an equivalent resistance value Req, the equivalent inductor and capacitor C having an equivalent inductance value Leq The high frequency AC power is applied to the RLC series circuit connected in series.

The heating device 10 may further include a memory 600. The memory 600 may store information about the heating device 10 and various information necessary for controlling the heating device 10. For example, various information and algorithms necessary for the control operation of the controller 300 may be stored in the memory 600. The memory 600 may include at least one of a nonvolatile memory such as a flash memory and a magnetoresistive memory, and a volatile memory such as a DRAM and an SRAM. The memory 600 may be implemented as hardware separate from the controller 300, but is not limited thereto. For example, when the controller 300 is implemented as a microcomputer or a minicomputer, the memory 600 may be implemented as one piece of hardware with the controller 300.

The memory 600 may store the heated object grade evaluation criteria information CRIT_EVAL and the cooking type database DB_TYPE. The cooking type determination unit 320 may be heated based on the electromagnetic coupling property CHAR_COMB between the coil and the heating object received from the coupling property measurement unit 200 and the cooking type database DB_TYPE stored in the memory 600. The type of cooking that can be performed in the sieve can be determined. For example, the cooking type determination unit 320 may evaluate the grade of the heating element based on the electromagnetic coupling property CHAR_COMB and the heating element rating evaluation criterion information CRIT_EVAL, and the grade of the evaluated heating element may be evaluated. And a cooking type executable in the heated object based on the cooking type database DB_TYPE. The heating element rating criterion information CRIT_EVAL is described in more detail with reference to FIGS. 5 and 7, and the cooking type database DB_TYPE is described in more detail with reference to FIGS. 8A, 8B, and 10.

According to the heating device 10 according to the exemplary embodiment of the present disclosure, the coupling characteristic measuring unit 200 measures the electromagnetic coupling characteristics of the coil and the heating body, and the cooking type determination unit 320 is the heating body. In operation 30, the cooking type may be determined, and the display unit 400 may notify the user of the cooking type determination result RST_TYPE, thereby helping the user to selectively perform cooking according to the heating object 30. .

3 is a flowchart illustrating a cooking type determination method executable in a heated object according to an exemplary embodiment of the present disclosure. 3 is described with reference to FIGS. 1 and 2 together.

In step S110, the control unit 300 may detect the presence or absence of the heating element 30 on the crater corresponding to the coil 100. For example, the controller 300 supplies the test AC power to the coil 100, and then monitors the power value consumed to determine whether the heating element 30 exists on the crater corresponding to the coil 100. You can judge.

In step S120, the next step may be divided into the step S130 and the step S140, respectively, depending on whether the heating element is present on the crater.

In step S130, when the control unit 300 determines that the heating element 30 does not exist on the crater, the control unit 300 may stop the heating operation by the coil 100.

In operation S140, when the controller 300 determines that the heating element 30 exists on the crater, the coupling characteristic measuring unit 200 may have electromagnetic coupling characteristics between the coil 100 and the heating element 30. (CHAR_COMB) can be measured.

In operation S150, the cooking type determining unit 320 included in the control unit 300 determines the cooking type executable in the heated object based on the electromagnetic coupling property CHAR_COMB measured by the coupling property measuring unit 200. can do. For example, the cooking type determination unit 320 may determine the cooking type executable in the heated object based on the electromagnetic coupling characteristic CHAR_COMB and the cooking type database DB_TYPE stored in the memory 600. The cooking type determination unit 320 may provide the display unit 400 with a cooking type determination result (RST_TYPE) that can be executed in the object to be heated. That is, the cooking type determination result RST_TYPE may include information on cooking types executable in the heated object. At this time, when the cooking types are executed in the heated object, the suitability of execution in the heated object may vary depending on the cooking types. For example, when the heating object is one kind of 'pot,' the cooking pot or stew may be more suitable for execution than 'frying'. In an embodiment, the cooking type determination result RST_TYPE may include not only information on cooking types executable in the heated object but also a performance suitability rank for each cooking type. Accordingly, in one embodiment, the display unit 400 may provide the user with an executable cooking type determination result by sorting the cooking types executable in the heated object according to the execution suitability ranking. For example, the display unit 400 may display the highest ranking cooking types in the top row by sorting in the order of high execution suitability, and display the lowest cooking type in the bottom row by displaying the cooking type in the bottom row in the order. Can be marked on. Here, the cooking type with a higher rank may mean a cooking type with higher execution suitability.

In operation S160, the display unit 400 may notify the user of the cooking type determination result RST_EVAL received from the cooking type determination unit 320 through at least one of a visual method, an audio method, and other methods. have.

4 illustrates a graph of frequency characteristics of average power consumed by an equivalent circuit of a coil and a heated object according to an exemplary embodiment of the present disclosure. 4 is described with reference to FIGS. 1 and 2 together.

Since the circuit supplied with alternating current power by the switching unit 540 exhibits substantially the characteristics of the RLC series circuit by the equivalent circuit and the capacitor of the coil 100 and the heating element 30, the average power consumed is 1st. Frequency characteristics such as curve 41, second curve 42, and third curve 43 can be exhibited.

In order to explain the frequency characteristics of the RLC series circuit, the first curve 41 is described as an example. The average power consumed may represent the maximum average power Pmax at the resonance frequency f_res. The resonance frequency f_res may be determined by the equivalent inductance value Leq and the capacitance of the capacitor C. The value obtained by dividing the resonance frequency f_res by the difference Δf between two frequencies at which the average power consumed is half the maximum average power Pmax is called a cue factor Q factor. Since the larger the Q factor, the smaller the difference Δf of the frequency, the better the circuit characteristics. The cue factor Q factor may be determined by the equivalent inductance value Leq, the equivalent resistance value Req, and the capacitance of the capacitor C.

The first curve 41 shows a case where the heated object 30 is most suitable for the heating device 10. The first curve 41 shows a case where the resonance frequency f_res coincides with the operating frequency f_op of the AC power provided by the power supply 500. Thus, the equivalent inductance value Leq when the resonance frequency f_res coincides with the operating frequency f_op will be referred to as a resonance inductance value. When the frequency characteristic of the average power represents the first curve 41, if the AC power of the operating frequency f_op is supplied to the coil 100, the coil 100 and the heated object 30 have the maximum average power Pmax. Average power consumption.

The second curve 42 represents a case where the equivalent inductance value Leq is smaller than the resonance inductance value defined above. Since the resonant frequency is increased because the equivalent inductance value Leq is smaller than the resonance inductance value, it can be seen that the maximum point of the average power has moved to the lower right on the graph. In the case of the second curve 42, if the operation is performed under the operating frequency f_op, the average power may represent the first power P1 smaller than the maximum average power Pmax. Not only in the case of the second curve 42, but also in the case where the equivalent inductance value Leq is larger than the above defined resonance inductance value, the performance degradation can likewise occur because the resonance frequency becomes smaller than the operating frequency f_op.

The third curve 43 represents a case where the equivalent resistance value Req is larger than that of the first curve 41. As the equivalent resistance value Req increases, the cue factor may decrease, and thus, the curve becomes wider. Also in the case of the third curve 43, it can be seen that the average power is reduced under the operating frequency f_op compared to the first curve 41.

5 illustrates the heating element rating criteria information CRIT_EVAL according to an exemplary embodiment of the present disclosure. FIG. 5 is for evaluating when the electromagnetic coupling characteristic CHAR_COMB of FIG. 1 represents the first power P1 which is the average power consumed by the coil and the heating element under the operating frequency f_op as shown in FIG. 4. Evaluation criteria information is shown.

Referring to FIG. 5, the grade evaluation result RST_EVAL of the heated object may include k levels (k_1 to L_k) and 'FAIL' of k (k is a natural number of 2 or more). As the k-th level L_k goes from the first level L_1, the grade of the heated object may be higher. The heated object rating criteria information CRIT_EVAL may include a look-up table of the rating results RST_EVAL corresponding to the first powers P1. According to the range of the first power P1, the controller may evaluate the grade of the heated object as one of k levels L_1 to L_k and 'FAIL'.

6 illustrates a coupling characteristic measurement unit 200 and a control unit 300 according to an exemplary embodiment of the present disclosure. FIG. 6 illustrates a coupling characteristic measuring unit 200 and a controller 300 when the electromagnetic coupling characteristic CHAR_COMB represents an equivalent impedance value Zeq between the first node Nd1 and the second node Nd2 of FIG. 1. ).

The coupling characteristic measuring unit 200 may measure the equivalent impedance value Zeq of the coil and the object to be heated by various methods. For example, the coupling characteristic measuring unit 200 may be implemented as a chip that senses an impedance value, or may measure the equivalent impedance value Zeq through the method described with reference to FIG. 7. The coupling characteristic measurement unit 200 may provide the measured equivalent impedance value Zeq to the cooking type determination unit 320 as the electromagnetic coupling characteristic CHAR_COMB. In order to measure the equivalent impedance value Zeq through the method of FIG. 7, the coupling characteristic measurer 200 provides a control signal CTRL for controlling the switching control operation of the switching controller 340 to the controller 300. can do.

In this case, the cooking type determination unit 320 may evaluate the grade of the heated object based on the received equivalent impedance value Zeq. For example, the cooking type determination unit 320 may evaluate the grade of the heating element by comparing the equivalent impedance value Zeq with the heating element grade evaluation criterion information.

7 illustrates heated object rating criteria information CRIT_EVAL according to an exemplary embodiment of the present disclosure. The heating element rating criterion information CRIT_EVAL may include a lookup table of evaluation results RST_EVAL corresponding to equivalent impedance values.

Referring to FIG. 7, the evaluation result RST_EVAL may include k levels L_1 to L_k and 'FAIL' (k is a natural number of 2 or more). As the k-th level L_k goes from the first level L_1, the grade of the heated object may be higher. In this case, the higher level may be referred to as the first level L_1 from the k-th level L_k. The heating element rating criterion information CRIT_EVAL includes evaluation results in which the equivalent inductance value Leq corresponds to the equivalent resistance value Req for each section divided by a plurality of reference inductance values Lref_L1 to LrefLn and Lref_H1 to Lref_Hn. It may include a lookup table of (RST_EVAL). For example, as the equivalent inductance value Leq is closer to the resonance inductance value described with reference to FIG. 4, the evaluation result RST_EVAL may be determined to a higher level. Also, for example, as long as the equivalent resistance value is greater than or equal to the threshold resistance value, the smaller the equivalent resistance value, the higher the determination result RST_EVAL can be determined.

8A and 8B illustrate a cooking type database DB_TYPE according to an exemplary embodiment of the present disclosure.

Referring to FIG. 8A, the cooking type database DB_TYPE may include a lookup table of the executable cooking type lists TYPE_ENABLE corresponding to the grade evaluation results RST_EVAL of the heated object. For example, the executable cooking type list TYPE_ENABLE corresponding to the evaluation result RST_EVAL of the first level L_1 may be the first list LIST_1. The first list LIST_1 may include cooking types executable in the heated object having the grade of the first level L_1. Since the grade of the heated object increases from the k-th level L_k to the first level L_1, the executable cooking type list TYPE_ENABLE increases more from the k-th list LIST_k to the first list LIST_1. Cooking types may be included. 1 and 2 together, the cooking type determination unit 320 is based on the electromagnetic coupling characteristics (CHAR_COMB) of the coil 100 and the heating element 30 and the heating element rating criteria information (CRIT_EVAL). The grade of the heated object 30 may be evaluated, and cooking types executable in the heated object 30 may be determined by comparing the grade evaluation result RST_EVAL with the cooking type data DB_TYPE. The cooking type determination unit 320 may provide the display unit 400 with executable cooking types as a cooking type determination result RST_TYPE.

Referring to FIG. 8B, the cooking type database DB_TYPE may include a lookup table of the optimized cooking type lists TYPE_OPT corresponding to the grade evaluation results RST_EVAL of the heated object. For example, the optimized cooking type list TYPE_OPT corresponding to the evaluation result RST_EVAL of the first level L_1 may be the first optimization list LIST_OPT_1. The first optimization list LIST_OPT_1 may include cooking types optimized for the heating object having a grade of the first level L_1. The optimized cooking types included in the first optimization list LIST_OPT_1 may be included in the executable cooking types included in the first executable list LIST_EN_1. 1 and 2 together, the cooking type determination unit 320 is based on the electromagnetic coupling characteristics (CHAR_COMB) of the coil 100 and the heating element 30 and the heating element rating criteria information (CRIT_EVAL). The cooking type and the heated object 30 executable in the heated object 30 may be evaluated by comparing the grade of the heated object 30, and comparing the rating result RST_EVAL with the cooking type data DB_TYPE. Cooking types optimized for may be determined. The cooking type determination unit 320 may provide the display unit 400 with executable cooking types and optimized cooking types as a cooking type determination result RST_TYPE.

9 is a flowchart illustrating a control operation after a cooking type selection is made by a user according to an exemplary embodiment of the present disclosure. That is, FIG. 9 may show an operation flowchart in an operation mode after the determination mode for determining the executable cooking type. 9 is described with reference to FIGS. 1 and 2 together.

In operation S162, the user may select a cooking type to be executed. That is, the heating device 10 may further include an input unit configured to receive a selected cooking type from a user. The input unit includes various types of input devices such as capacitive touch panels, pressure sensitive touch panels, infrared touch panels, ultrasonic touch panels, physical buttons, optical keys, keypads, (digital) pen sensors, and voice input devices. It may include at least one. In addition, according to the implementation of the heating device 10, the input unit may be implemented as one device with the display unit 400. For example, when the display unit 400 includes a touchable display unit, the display unit 400 may also perform a function of an input unit that receives a touch input signal. As such, when the display unit 400 includes a touchable display unit, the display unit 400 may provide a user with a cooking type executable on the heated object 30 and select a cooking type to be executed from among the provided cooking types. You can provide a user interface (User Interface). When such a user interface is provided, the determination of step S164 may not be made.

In operation S164, it may be determined whether the selected cooking type input through the input unit is included in the executable cooking type. For example, the controller 300 may determine whether the selected cooking type is included in the cooking type determination result RST_TYPE. Depending on whether it is included in the executable cooking type may proceed to step S166 or S168.

In operation S166, when the selected cooking type is not included in the executable cooking type, the heating device 10 may warn the user through the display unit 400. For example, the heating device 10 may notify the user through the display unit 400 that the selected cooking type is a cooking type that is not executable in the heated object 30.

In operation S168, when the selected cooking type is included in the executable cooking type, the heating device 10 may notify the user through the display unit 400 that the selected cooking type is the cooking type executable in the heating object 30. In addition, the heating device 10 may provide a cooking manual necessary for the execution of the selected cooking type in the heating target body 30. The cooking manual is described with reference to FIG. 10.

10 illustrates a cooking type database DB_TYPE according to an exemplary embodiment of the present disclosure. The cooking type database DB_TYPE may include a lookup table of a cooking manual MANUAL corresponding to the grade evaluation result RST_EVAL of the heated object and the selected cooking types TYPE_SEL. The cooking manual MANUAL may include information regarding an exemplary sequence and / or an ideal sequence of execution operations when executing the selected cooking type.

Referring to FIG. 1 and FIG. 2, the control unit 300 evaluates the rating result of the heating element 30 evaluated based on the electromagnetic coupling characteristic CHAR_COMB and the heating element rating criterion information CRIT_EVAL. ) And the cooking manual (MANUAL) when executing the selected cooking type on the object to be heated by comparing the selected cooking type (TYPE_SEL) input by the user with a look-up table included in the cooking type database (DB_TYPE). You can decide. The controller 300 may provide a cooking manual MANUAL to the display unit 400, and the display unit 400 may provide the provided cooking manual MANUAL to a user.

As described above, exemplary embodiments have been disclosed in the drawings and the specification. Although embodiments have been described using specific terms in this specification, they are used only for the purpose of describing the technical spirit of the present disclosure and are not used to limit the scope of the present disclosure as defined in the meaning or claims. . Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present disclosure will be defined by the technical spirit of the appended claims.

Claims (7)

In the induction heating heating device,
In the operating mode of the heating apparatus, the heating object is electromagnetically coupled to the heating object mounted on the crater, and supplied with alternating current power of a predetermined operating frequency to induce a current in the heating object. Coil heating;
In the determination mode for determining a cooking type executable in the heating object, a result of measuring electromagnetic coupling characteristics between the coil and the heating object using the AC characteristics of the coil and the equivalent circuit of the heating object A coupling characteristic measurement unit to generate;
In the determination mode, it is determined whether the object to be heated is on the crater, and when the object to be heated is on the crater, the measurement result of the electromagnetic coupling property and the cooking type database stored in the heating apparatus are determined. A controller configured to determine a cooking type executable on the heated object based on the result; And
And a display unit configured to receive a cooking type determination result from the control unit and inform the user of the cooking type determination result. The method of claim 1,
The control unit,
The grade of the heated object is evaluated at one of a plurality of levels by comparing the measurement result of the electromagnetic coupling property with predetermined heating element rating criteria information stored in the heating device, and the evaluation result and evaluation of the grade And determine the executable cooking type based on the cooking type database including a lookup table of the executable cooking type lists corresponding to the results. The method of claim 2,
The cooking type database,
The apparatus may further include a lookup table of optimized cooking type lists corresponding to the evaluation results.
The control unit,
Further determine a cooking type optimized for the heated object based on the measurement result of the electromagnetic coupling property and the cooking type database,
The display unit,
And further receiving a determination result of the optimized cooking type from the controller, and further notifying a user of the determination result of the optimized cooking type. The method of claim 3,
The heating device,
In the operation mode after the determination mode, further comprising an input unit for receiving a selection cooking type,
The control unit,
And when the selected cooking type is not included in the cooking type determination result, a warning message is displayed to the user through the display unit. The method of claim 4, wherein
The control unit,
When the selected cooking type is included in the cooking type determination result, an execution manual of the cooking type is provided through the display unit based on the level of the grade and the selected cooking type according to the evaluation result of the grade. Heating device. The method of claim 1,
In the operation mode after the determination mode, the heating apparatus further comprises an input unit for receiving a cooking type of one of the cooking types included in the cooking type determination result displayed through the display unit. The method of claim 1,
The control unit,
Determine the suitability of performance in the heated object for each of the viable cooking types,
The display unit,
And notify the user by sorting the cooking type determination result according to the execution suitability determined for each of the executable cooking types.

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